mermaid-c4-zoom

1import { atom, read, update } from 'claude-code'
2import type { EngineInterface, Register } from 'claude-code'
3
4import type { Diagram } from '../types'
5import { joinStems, paint, roundCorners, runs } from './paint'
6import { ASK_PROBLEM_MAP, cleanTree, parsePromptTimes, tocPrompt, groupsOf, isTree, paintTreeLine, treeTitle, wrapTreeLine } from './tree'
7import { renderMermaidAscii } from './vendor/mermaid-text.js'
8
9const PANE = 'diagrams'
10const TOOL = 'mcp__mermaid-c4-zoom__show_diagram'
11const MAX_KEPT = 20
12
13const list = atom({ plugin: 'mermaid-c4-zoom', key: 'list' } as const, [])
14const shown = atom({ plugin: 'mermaid-c4-zoom', key: 'shown' } as const, 0)
15const path = atom({ plugin: 'mermaid-c4-zoom', key: 'path' } as const, [])
16const transcriptPath = atom({ plugin: 'mermaid-c4-zoom', key: 'transcriptPath' } as const, '')
17const isMapping = atom({ plugin: 'mermaid-c4-zoom', key: 'isMapping' } as const, false)
18
19const TOOL_DESCRIPTION = [
20  'Draw a mermaid diagram in the side pane beside the conversation.',
21  'Use it when a flow, a sequence, states, classes or tables are easier to see than read.',
22  'Supported: flowchart/graph (TD or LR), sequenceDiagram, stateDiagram-v2,',
23  'classDiagram, erDiagram, xychart-beta. Pie charts and other types are not supported.',
24  'Keep labels short; the pane is about 40 to 60 columns wide, so prefer TD over LR',
25  'for anything with more than four nodes in a row.',
26  'Avoid arrows that point back up to an earlier node: in text they squeeze between boxes and tangle.',
27  'In labels, avoid * and ~ (read as markdown) and = (fonts may merge it with the character before).',
28  'For a layered, C4-style view, pass zoom: it maps a node id of this diagram to the diagram inside that node',
29  '({ title, mermaid, zoom }, nested as deep as needed). The person clicks the node to go one level in.',
30].join(' ')
31
32const NBSP = '\u00a0'
33
34/** Pads each line of a flowchart's [box] and {diamond} labels with a no-break space, so text never touches the border. */
35export function padLabels(source: string): string {
36  if (!/^\s*(graph|flowchart)\b/.test(source)) return source
37  const pad = (inner: string) => {
38    if (/^[([/\\>{]/.test(inner)) return null
39    const quoted = /^".*"$/s.test(inner)
40    const body = quoted ? inner.slice(1, -1) : inner
41    const padded = body
42      .split(/(<br\s*\/?>)/i)
43      .map(part => (/^<br/i.test(part) ? part : `${NBSP}${part.trim()}${NBSP}`))
44      .join('')
45
46    return quoted ? `"${padded}"` : padded
47  }
48
49  return source
50    .replace(/(\w)\[([^\]\n]*)\]/g, (whole, id: string, inner: string) => {
51      const padded = pad(inner)
52      return padded === null ? whole : `${id}[${padded}]`
53    })
54    .replace(/(\w)\{([^}\n]*)\}/g, (whole, id: string, inner: string) => {
55      const padded = pad(inner)
56      return padded === null ? whole : `${id}{${padded}}`
57    })
58}
59
60export const ZOOM_MARK = ' ▸'
61
62/** The first line of a node's [box] or {diamond} label, or undefined. */
63export function labelOf(source: string, id: string): string | undefined {
64  const m = new RegExp(`(?:^|[^\\w])${id}\\s*(?:\\[|\\{)"?([^"\\]}\\n]*)`, 'm').exec(source)
65  if (!m) return undefined
66  const first = (m[1] ?? '').split(/<br\s*\/?>/i)[0]?.trim()
67
68  return first === '' ? undefined : first
69}
70
71/** Adds the zoom mark after the first label line of each node that opens a level. */
72export function markZoomable(source: string, ids: string[]): string {
73  return ids.reduce((text, id) => {
74    const label = labelOf(text, id)
75    if (label === undefined) return text
76    const at = new RegExp(`((?:^|[^\\w])${id}\\s*(?:\\[|\\{)"?\\s*)`, 'm').exec(text)
77    if (!at) return text
78    const start = at.index + at[0].length
79    const end = text.indexOf(label, start) + label.length
80
81    return text.slice(0, end) + ZOOM_MARK + text.slice(end)
82  }, source)
83}
84
85/** Mermaid source as monospace text art, or the parser's complaint. */
86export function drawMermaid(source: string): { art: string } | { error: string } {
87  try {
88    const art = renderMermaidAscii(padLabels(source.replace(/^(\s*%%[^\n]*\n)+/, '')), {
89      colorMode: 'none',
90      paddingX: 2,
91      // Three rows between nodes leave room for a stem, a fork and the arrowhead.
92      paddingY: 3,
93      boxBorderPadding: 0,
94    })
95      .replace(/[ \t]+$/gm, '')
96      .trimEnd()
97    if (art === '') return { error: 'The diagram drew nothing.' }
98
99    return { art: roundCorners(joinStems(art)) }
100  } catch (err) {
101    return { error: err instanceof Error ? err.message : String(err) }
102  }
103}
104
105/** The ```mermaid blocks in a reply, in order. */
106export function mermaidBlocks(text: string): string[] {
107  return [...text.matchAll(/```mermaid[ \t]*\n([\s\S]*?)\n[ \t]*```/g)].map(m => (m[1] ?? '').trim()).filter(s => s !== '')
108}
109
110/** A fallback title: the diagram type named on the first line. */
111export function guessTitle(source: string): string {
112  const head = source.split('\n')[0]?.trim() ?? 'Diagram'
113  const type = head.split(/\s+/)[0] ?? 'Diagram'
114
115  return type.replace(/-v2|-beta/, '')
116}
117
118/** Reads one level of tool input (title, mermaid, zoom) into a Diagram, collecting every problem. */
119export function parseLevel(raw: unknown, where: string): { diagram: Diagram } | { errors: string[] } {
120  const input = (raw ?? {}) as { title?: unknown; mermaid?: unknown; zoom?: unknown }
121  const source = typeof input.mermaid === 'string' ? input.mermaid.replace(/^```(?:mermaid)?\s*\n|\n```\s*$/g, '').trim() : ''
122  const title = typeof input.title === 'string' && input.title.trim() !== '' ? input.title.trim() : guessTitle(source)
123  const errors: string[] = []
124  const drawn = drawMermaid(source)
125  if ('error' in drawn) errors.push(`The ${where} diagram did not parse: ${drawn.error}.`)
126
127  const zoom: Record<string, Diagram> = {}
128  if (input.zoom !== undefined && (typeof input.zoom !== 'object' || input.zoom === null)) {
129    errors.push(`zoom in the ${where} diagram must be an object of node id to diagram.`)
130  }
131  for (const [id, child] of Object.entries((input.zoom ?? {}) as Record<string, unknown>)) {
132    if (labelOf(source, id) === undefined) {
133      errors.push(`zoom names ${id}, but the ${where} diagram has no [box] or {diamond} node with that id.`)
134      continue
135    }
136    const level = parseLevel(child, `${where} > ${id}`)
137    if ('errors' in level) errors.push(...level.errors)
138    else zoom[id] = level.diagram
139  }
140  if (errors.length > 0) return { errors }
141
142  return { diagram: { id: newId(), title, source, ...(Object.keys(zoom).length > 0 ? { zoom } : {}) } }
143}
144
145function countLevels(diagram: Diagram): number {
146  return 1 + Object.values(diagram.zoom ?? {}).reduce((sum, child) => sum + countLevels(child), 0)
147}
148
149/** The diagram at the end of a zoom path, and the titles along the way; a stale path stops where it breaks. */
150export function follow(top: Diagram, ids: string[]): { diagram: Diagram; trail: string[]; depth: number } {
151  let diagram = top
152  const trail = [top.title]
153  let depth = 0
154  for (const id of ids) {
155    const child = diagram.zoom?.[id]
156    if (child === undefined) break
157    diagram = child
158    trail.push(child.title)
159    depth += 1
160  }
161
162  return { diagram, trail, depth }
163}
164
165/** Where each zoomable node's first label line sits in the art: row and character columns. */
166export function zoomSpans(lines: string[], diagram: Diagram, ids: string[]): { id: string; row: number; start: number; end: number }[] {
167  const spans: { id: string; row: number; start: number; end: number }[] = []
168  for (const id of ids) {
169    const label = labelOf(diagram.source, id)
170    if (label === undefined) continue
171    const target = [...`${label}${ZOOM_MARK}`]
172    for (let row = 0; row < lines.length; row++) {
173      const chars = [...(lines[row] ?? '')].map(ch => (ch === NBSP ? ' ' : ch))
174      const start = chars.findIndex((_, c) => target.every((t, k) => chars[c + k] === t))
175      if (start === -1) continue
176      spans.push({ id, row, start, end: start + target.length })
177      break
178    }
179  }
180
181  return spans.sort((a, b) => a.row - b.row || a.start - b.start)
182}
183
184function newId(): string {
185  return Math.random().toString(36).slice(2, 10)
186}
187
188/** Two diagrams are the same when everything but their ids matches, zoom levels included. */
189function sameness(diagram: Diagram): string {
190  return JSON.stringify(diagram, (key, value: unknown) => (key === 'id' ? undefined : value))
191}
192
193async function addDiagrams($: EngineInterface, fresh: Diagram[]) {
194  if (fresh.length === 0) return
195  const known = new Set((await read($, list)).map(sameness))
196  const unseen = fresh.filter(d => !known.has(sameness(d)))
197  if (unseen.length === 0) return
198  const kept = await update($, list, old => [...old, ...unseen].slice(-MAX_KEPT))
199  await update($, shown, () => kept.length - 1)
200  await update($, path, () => [])
201  try {
202    await openPane($)
203  } catch {
204    // The diagram is kept; /diagrams opens the pane by hand.
205  }
206}
207
208async function openPane($: EngineInterface) {
209  const panes = await $.ui.panes()
210  if (!panes.some(pane => pane.id === PANE)) await $.ui.open({ id: PANE, title: 'Diagrams' })
211}
212
213async function togglePane($: EngineInterface): Promise<boolean> {
214  const panes = await $.ui.panes()
215  if (panes.some(pane => pane.id === PANE)) {
216    await $.ui.close({ id: PANE })
217
218    return false
219  }
220  await $.ui.open({ id: PANE, title: 'Diagrams' })
221
222  return true
223}
224
225async function step($: EngineInterface, by: number) {
226  const count = (await read($, list)).length
227  await update($, shown, i => Math.min(Math.max(i + by, 0), Math.max(count - 1, 0)))
228  await update($, path, () => [])
229}
230
231const TREES = {
232  map: { name: 'problem map' },
233  toc: { name: 'table of contents' },
234} as const
235
236/** The person's typed prompts with local times, read from the transcript with grep; empty when it cannot. */
237async function promptTimes($: EngineInterface): Promise<string[]> {
238  const file = await read($, transcriptPath)
239  if (file === '') return []
240  try {
241    const ran = await $.process.run(['sh', '-c', 'date +%z; grep -F \'"origin":{"kind":"human"\' "$1"', 'sh', file])
242
243    return parsePromptTimes(ran.stdout)
244  } catch {
245    return []
246  }
247}
248
249/** Asks a fork of the agent for a tree of the session (a problem map or a table of contents) and shows it; the main conversation never sees it. */
250async function mapSession($: EngineInterface, which: keyof typeof TREES = 'map') {
251  if (await read($, isMapping)) return
252  await update($, isMapping, () => true)
253  try {
254    await openPane($)
255    const prompt = which === 'toc' ? tocPrompt(await promptTimes($)) : ASK_PROBLEM_MAP
256    const reply = await $.model.fork({ prompt })
257    if (!reply.isAnswered) {
258      await $.ui.toast('Nothing to map yet: the session has no conversation.')
259      return
260    }
261    const text = cleanTree(reply.text)
262    if (!isTree(text)) {
263      await $.ui.toast(`The ${TREES[which].name} came back in the wrong shape. Try again.`)
264      return
265    }
266    await addDiagrams($, [{ id: newId(), title: treeTitle(text), source: text, kind: 'tree' }])
267  } finally {
268    await update($, isMapping, () => false)
269  }
270}
271
272async function zoomIn($: EngineInterface, id: string) {
273  await update($, path, ids => [...ids, id])
274}
275
276async function zoomOut($: EngineInterface, depth: number) {
277  await update($, path, ids => ids.slice(0, depth))
278}
279
280async function forget($: EngineInterface) {
281  const index = await read($, shown)
282  const left = await update($, list, old => old.filter((_, i) => i !== index))
283  await update($, shown, i => Math.min(i, Math.max(left.length - 1, 0)))
284  await update($, path, () => [])
285}
286
287export const register: Register = on => {
288  on('session.start', async ($, e, next) => {
289    await $.tool.register({
290      name: 'show_diagram',
291      description: TOOL_DESCRIPTION,
292      inputSchema: {
293        type: 'object',
294        properties: {
295          title: { type: 'string', description: 'A short title, under 40 characters.' },
296          mermaid: { type: 'string', description: 'The mermaid source, without ``` fences.' },
297          zoom: {
298            type: 'object',
299            description: 'Optional. Node id of this diagram -> { title, mermaid, zoom } for the level inside that node.',
300            additionalProperties: { type: 'object' },
301          },
302        },
303        required: ['title', 'mermaid'],
304      },
305    })
306    await $.command.register({
307      name: 'diagrams',
308      description: 'Open or close the diagrams pane; /diagrams map draws a problem map, /diagrams toc a table of contents of this session',
309      immediate: true,
310    })
311
312    return next(e)
313  })
314
315  // The transcript file holds each prompt's time; the classic hook is where its path shows.
316  on('classic.UserPromptSubmit', async ($, e, next) => {
317    await update($, transcriptPath, () => e.transcript_path)
318
319    return next(e)
320  })
321
322  on('tool.call', { tool: TOOL }, async ($, e) => {
323    // MCP tool arguments arrive on the event itself, beside tool and tool_use_id.
324    const parsed = parseLevel(e, 'top')
325    if ('errors' in parsed) {
326      return { isError: true, result: `Nothing was shown. ${parsed.errors.join(' ')}` }
327    }
328    const top = parsed.diagram
329    await addDiagrams($, [top])
330    const drawn = drawMermaid(markZoomable(top.source, Object.keys(top.zoom ?? {})))
331    const size = 'art' in drawn ? drawn.art.split('\n') : []
332    const width = Math.max(0, ...size.map(line => [...line].length))
333    const levels = countLevels(top) - 1
334    const inside = levels > 0 ? ` with ${levels} zoomed level${levels === 1 ? '' : 's'} inside` : ''
335
336    return { result: `Shown in the diagrams pane as "${top.title}"${inside}, ${width} columns wide and ${size.length} rows tall.` }
337  })
338
339  // Mermaid blocks the agent writes in its reply show in the pane too.
340  on('turn.complete', async ($, e, next) => {
341    const done = await next(e)
342    if (e.agentId === undefined && !e.isAborted) {
343      const fresh = mermaidBlocks(e.answer)
344        .filter(source => !('error' in drawMermaid(source)))
345        .map(source => ({ id: newId(), title: guessTitle(source), source }))
346      await addDiagrams($, fresh)
347    }
348
349    return done
350  })
351
352  on('command.run', { command: 'diagrams' }, async ($, e) => {
353    const arg = e.args.trim()
354    if (arg === 'map' || arg === 'toc') {
355      // On a timer, so the command answers at once while the fork works.
356      $.clock.after(0, () => void mapSession($, arg))
357
358      return { text: arg === 'toc' ? 'Writing a table of contents of this session in the diagrams pane. The agent keeps working; it never sees it.' : 'Mapping this session in the diagrams pane. The agent keeps working; it never sees the map.' }
359    }
360    const isOpen = await togglePane($)
361
362    return { text: isOpen ? 'Diagrams pane opened.' : 'Diagrams pane closed.' }
363  })
364
365  on('ui.render', { component: 'Pane', requestId: PANE }, async ($, e) => {
366    const { Box, Text, Button } = $.ui.resolve(e)
367    const diagrams = await read($, list)
368    const index = await read($, shown)
369    const top = diagrams[index]
370    const width = e.props.bodyColumns
371    const mapping = await read($, isMapping)
372    const mapButton = mapping ? (
373      <Text dimColor>writing…</Text>
374    ) : (
375      <Box flexDirection="row" gap={3}>
376        <Button key="map" plain onPress={() => void mapSession($, 'map')}>
377          problem map
378        </Button>
379        <Button key="toc" plain onPress={() => void mapSession($, 'toc')}>
380          table of contents
381        </Button>
382      </Box>
383    )
384
385    if (top === undefined) {
386      return (
387        <Box flexDirection="column" width={width}>
388          <Text bold>Diagrams</Text>
389          <Text dimColor wrap="wrap">No diagrams yet. Ask the agent to draw one, or it can write a mermaid block in a reply.</Text>
390          <Box marginTop={1}>{mapButton}</Box>
391        </Box>
392      )
393    }
394
395    const { diagram, trail, depth } = follow(top, await read($, path))
396    const zoomIds = Object.keys(diagram.zoom ?? {})
397    const isTreeView = diagram.kind === 'tree'
398    const drawn = isTreeView ? ({ art: '' } as const) : drawMermaid(markZoomable(diagram.source, zoomIds))
399    const treeSource = isTreeView ? diagram.source.split('\n') : []
400    const treeGroups = groupsOf(treeSource)
401    const treeRows = treeSource.flatMap((line, i) => wrapTreeLine(line, width).map(text => ({ text, group: treeGroups[i] ?? 0 })))
402    const lines = 'art' in drawn && !isTreeView ? drawn.art.split('\n') : []
403    const colors = 'art' in drawn ? paint(drawn.art) : []
404    const spans = zoomSpans(lines, diagram, zoomIds)
405    const isTooWide = lines.some(line => [...line].length > width)
406
407    return (
408      <Box flexDirection="column" width={width}>
409        <Box flexDirection="row" gap={1}>
410          <Button key="prev" plain onPress={() => void step($, -1)}>
411            ‹
412          </Button>
413          <Text dimColor>{`${index + 1}/${diagrams.length}`}</Text>
414          <Button key="next" plain onPress={() => void step($, 1)}>
415            ›
416          </Button>
417          <Text bold wrap="truncate-end">
418            {top.title}
419          </Text>
420        </Box>
421        {depth > 0 && (
422          <Box flexDirection="row" gap={1}>
423            <Button key="up" label="‹ up" hotkey="u" plain onPress={() => void zoomOut($, depth - 1)} />
424            <Text wrap="truncate-end">{trail.slice(1).join(' › ')}</Text>
425          </Box>
426        )}
427        <Box flexDirection="column" marginTop={1}>
428          {isTreeView ? (
429            treeRows.map((row, i) => (
430              <Text key={`t${i}`}>
431                {paintTreeLine(row.text, row.group).map((run, k) => (
432                  <Text key={`r${k}`} color={run.color} bold={run.bold}>
433                    {run.text}
434                  </Text>
435                ))}
436              </Text>
437            ))
438          ) : 'art' in drawn ? (
439            lines.map((line, i) => {
440              const parts = runs(line, colors[i])
441              const row = spans.filter(span => span.row === i)
442              if (row.length === 0) {
443                return (
444                  <Text key={`l${i}`} wrap="truncate-end">
445                    {line === '' ? ' ' : parts.map((run, k) => <Text key={`r${k}`} color={run.color}>{run.text}</Text>)}
446                  </Text>
447                )
448              }
449              const chars = [...line]
450              const pieces: { text: string; color?: string; zoom?: string }[] = []
451              let at = 0
452              for (const span of row) {
453                pieces.push(...runs(chars.slice(at, span.start).join(''), colors[i]?.slice(at, span.start)))
454                pieces.push({ text: chars.slice(span.start, span.end).join(''), zoom: span.id })
455                at = span.end
456              }
457              pieces.push(...runs(chars.slice(at).join(''), colors[i]?.slice(at)))
458
459              return (
460                <Box key={`l${i}`} flexDirection="row">
461                  {pieces.map((piece, k) =>
462                    piece.zoom !== undefined ? (
463                      <Button key={`zoom-${piece.zoom}`} label={piece.text} plain onPress={() => void zoomIn($, piece.zoom!)} />
464                    ) : (
465                      <Text key={`r${k}`} color={piece.color}>
466                        {piece.text}
467                      </Text>
468                    ),
469                  )}
470                </Box>
471              )
472            })
473          ) : (
474            <Text color="red" wrap="wrap">{`Could not draw it: ${drawn.error}`}</Text>
475          )}
476        </Box>
477        {isTooWide && (
478          <Text dimColor wrap="wrap">
479            Cut off at the right edge. Widen the window, or ask for a top-down layout.
480          </Text>
481        )}
482        {zoomIds.length > 0 && (
483          <Box flexDirection="column" marginTop={1}>
484            <Text dimColor>Click a ▸ box, or press its number, to look inside:</Text>
485            {zoomIds.slice(0, 9).map((id, k) => (
486              <Button
487                key={`key-${id}`}
488                label={labelOf(diagram.source, id) ?? id}
489                hotkey={String(k + 1)}
490                plain
491                onPress={() => void zoomIn($, id)}
492              />
493            ))}
494          </Box>
495        )}
496        <Box marginTop={1} flexDirection="row" gap={3}>
497          {mapButton}
498          <Button key="forget" plain onPress={() => void forget($)}>
499            remove this one
500          </Button>
501        </Box>
502      </Box>
503    )
504  })
505}
506

1// Colors for diagram text art. Adapted from prismantis hooks/mermaid.tsx
2// (MIT): each box gets its own pastel, the same label keeps its color,
3// lines and arrowheads share one quiet color.
4
5/** Catppuccin Mocha pastels, one per box, in turn. */
6const BOX_COLORS = ['#f5c2e7', '#89b4fa', '#a6e3a1', '#f9e2af', '#cba6f7', '#94e2d5', '#fab387']
7// Lines and arrowheads share one color, so a head never floats apart from its line.
8const LINE_COLOR = '#9399b2'
9const TEXT_COLOR = '#cdd6f4'
10
11const LINE = /[─-╿◇]/
12const ROUND: Record<string, string> = { '┌': '╭', '┐': '╮', '└': '╰', '┘': '╯' }
13
14/** Swaps square corners for round ones, boxes and line bends alike. */
15export function roundCorners(art: string): string {
16  return art.replace(/[┌┐└┘]/g, ch => ROUND[ch] ?? ch)
17}
18
19/** Puts a ┬ in a box's bottom edge where a line leaves it straight down. */
20export function joinStems(art: string): string {
21  const grid = art.split('\n').map(line => [...line])
22  grid.forEach((row, r) =>
23    row.forEach((ch, c) => {
24      if (ch !== '─') return
25      const left = row.slice(0, c).join('')
26      const isBottomEdge = /[└╰][─┬┴]*$/.test(left)
27      if (isBottomEdge && grid[r + 1]?.[c] === '│') row[c] = '┬'
28    }),
29  )
30
31  return grid.map(row => row.join('')).join('\n')
32}
33
34type Box = { r: number; c: number; r2: number; c2: number }
35
36/** A color for every cell of the art, row by row. */
37export function paint(art: string): (string | undefined)[][] {
38  const grid = art.split('\n').map(line => [...line])
39  const cell = (r: number, c: number) => grid[r]?.[c] ?? ''
40  const color: (string | undefined)[][] = grid.map(row => row.map(() => undefined))
41  const labels = new Map<string, string>()
42
43  const boxes: Box[] = []
44  for (let r = 0; r < grid.length; r++) {
45    for (let c = 0; c < (grid[r]?.length ?? 0); c++) {
46      if (!/[┌╭(]/.test(cell(r, c))) continue
47      let c2 = c + 1
48      while (/[─┬┴┼▲▼]/.test(cell(r, c2))) c2++
49      if (!/[┐╮)]/.test(cell(r, c2)) || c2 === c + 1) continue
50      let r2 = r + 1
51      while (/[│├┤┼►◄▶◀]/.test(cell(r2, c))) r2++
52      if (!/[└╰(]/.test(cell(r2, c)) || !/[┘╯)]/.test(cell(r2, c2))) continue
53      boxes.push({ r, c, r2, c2 })
54    }
55  }
56  const inside = (a: Box, b: Box) => a !== b && b.r > a.r && b.r2 < a.r2 && b.c > a.c && b.c2 < a.c2
57  for (const box of boxes.filter(a => !boxes.some(b => inside(a, b)))) {
58    const { r, c, r2, c2 } = box
59    const label = grid
60      .slice(r + 1, r2)
61      .map(row => row.slice(c + 1, c2).join(''))
62      .join(' ')
63      .trim()
64    if (!labels.has(label)) labels.set(label, BOX_COLORS[labels.size % BOX_COLORS.length]!)
65    const hue = labels.get(label)
66    for (let y = r; y <= r2; y++) for (let x = c; x <= c2; x++) if (cell(y, x).trim()) color[y]![x] = hue
67  }
68
69  grid.forEach((row, r) =>
70    row.forEach((ch, c) => {
71      if (color[r]![c] !== undefined || ch.trim() === '') return
72      if (LINE.test(ch) || /[►◄▲▼▶◀]/.test(ch)) color[r]![c] = LINE_COLOR
73      else color[r]![c] = TEXT_COLOR
74    }),
75  )
76
77  return color
78}
79
80/** One art line as runs of same-colored text. */
81export function runs(line: string, colors: (string | undefined)[] | undefined): { text: string; color?: string }[] {
82  const chars = [...line]
83  const out: { text: string; color?: string }[] = []
84  let at = 0
85  while (at < chars.length) {
86    const hue = colors?.[at]
87    let end = at + 1
88    while (end < chars.length && colors?.[end] === hue) end++
89    out.push({ text: chars.slice(at, end).join(''), color: hue })
90    at = end
91  }
92
93  return out
94}
95

1// Problem maps: an indented text tree of what the session is working on,
2// written by a fork of the agent and drawn in the pane beside the diagrams.
3
4export const ASK_PROBLEM_MAP = [
5  'Pause the work for a moment. Do not use tools.',
6  'Draw a problem map of what we are working on in this session, as a plain text tree.',
7  'Use exactly this shape, and nothing before or after it:',
8  '',
9  'Problem: <the business problem, two or three plain sentences, said to the person as "you want ...":',
10  '  what they are trying to get done and why it matters to them, then the limits they set. No tool or code names.>',
11  '',
12  'Problem: <the same problem in under eight words>',
13  '│',
14  '├── 1. WHAT <short heading>',
15  '│   ├── <one fact or decision>',
16  '│   └── <one fact or decision>',
17  '├── 2. HOW <short heading>',
18  '│   └── <...>',
19  '└── 7. <last group>',
20  '    └── <...>',
21  '',
22  'Rules:',
23  '- Start from the person\'s goal, not from the code: group 1 is WHY, what changes for them when this works.',
24  '- Then 3 to 7 more groups, such as WHAT, HOW, WHEN, WHERE it lives, WHERE results go, WHAT the person sees, SAFETY.',
25  '- Each group has 2 to 4 items. Each item is one line under 60 characters.',
26  '- Use the real names, numbers and decisions from this session. Mark open questions with "?".',
27  '- Plain everyday words a high school student would understand.',
28  '- Use the characters │ ├── └── exactly as shown.',
29].join('\n')
30
31export const ASK_SESSION_TOC = [
32  'Pause the work for a moment. Do not use tools.',
33  'Write a table of contents of this whole session, as a plain text tree.',
34  'Use exactly this shape, and nothing before or after it:',
35  '',
36  'Session: <what this session was about, in under eight words>',
37  '│',
38  '├── 1. <topic>',
39  '│   ├── <what was done> [seen]',
40  '│   └── Decided: <a choice the person made>',
41  '├── 2. <topic>',
42  '│   └── <...> [tested]',
43  '└── Open',
44  '    └── <something unfinished>',
45  '',
46  'Rules:',
47  '- 3 to 8 numbered topics, in the order they happened.',
48  '- Each topic has 2 to 5 items. Each item is one line under 60 characters.',
49  '- End each finished item with one tag: [seen] if it was shown working on screen,',
50  '  [tested] if it was only checked by tests or commands, [live] if it is published or running for real.',
51  '- Start a choice the person made with "Decided:". Decisions take no tag.',
52  '- Put real file paths, repo names and commands in items where they help find the work.',
53  '- The last group is Open: what is unfinished or never seen working. If nothing, one item: nothing open.',
54  '- Plain everyday words a high school student would understand.',
55  '- Use the characters │ ├── └── exactly as shown.',
56].join('\n')
57
58const MONTHS = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
59
60/**
61 * The person's typed prompts with local times, one line each, from the output
62 * of `date +%z` followed by the transcript rows grep picked out.
63 */
64export function parsePromptTimes(stdout: string, max = 60): string[] {
65  const [zone = '+0000', ...rows] = stdout.split('\n')
66  const z = /^([+-])(\d\d)(\d\d)$/.exec(zone.trim())
67  const offset = z ? (z[1] === '-' ? -1 : 1) * (Number(z[2]) * 60 + Number(z[3])) * 60000 : 0
68  const lines: string[] = []
69  for (const row of rows) {
70    if (row.trim() === '') continue
71    try {
72      const d = JSON.parse(row) as { timestamp?: string; message?: { content?: unknown } }
73      const text = d.message?.content
74      const at = Date.parse(d.timestamp ?? '')
75      if (typeof text !== 'string' || Number.isNaN(at)) continue
76      const t = new Date(at + offset)
77      const hh = String(t.getUTCHours()).padStart(2, '0')
78      const mm = String(t.getUTCMinutes()).padStart(2, '0')
79      const said = text.replace(/\s+/g, ' ').trim().slice(0, 80)
80      lines.push(`${MONTHS[t.getUTCMonth()]} ${t.getUTCDate()} ${hh}:${mm}  ${said}`)
81    } catch {
82      // A row cut short or not JSON: skip it.
83    }
84  }
85
86  return lines.slice(-max)
87}
88
89/** The table of contents prompt, with the person's prompt times when there are any. */
90export function tocPrompt(times: string[]): string {
91  if (times.length === 0) return ASK_SESSION_TOC
92
93  return [
94    ASK_SESSION_TOC,
95    '- Start each numbered topic with the local time it began, taken from the list below:',
96    '  "├── 1. 22:45 First version". When topics span days, give the day at each change: "├── 4. Oct 7 15:00 ...".',
97    '',
98    'The person\'s own messages in this session, with local times:',
99    ...times,
100  ].join('\n')
101}
102
103/** Pastels for the numbered groups, in turn (Catppuccin Mocha). */
104const GROUP_COLORS = ['#f5c2e7', '#89b4fa', '#a6e3a1', '#f9e2af', '#cba6f7', '#94e2d5', '#fab387', '#f38ba8']
105const GLYPH_COLOR = '#9399b2'
106
107/** The tree text out of a reply: code fences and blank edges dropped. */
108export function cleanTree(reply: string): string {
109  return reply
110    .replace(/^\s*```[a-z]*\s*\n/i, '')
111    .replace(/\n\s*```\s*$/, '')
112    .replace(/[ \t]+$/gm, '')
113    .trim()
114}
115
116const HEAD = /^(Problem|Session):/
117
118/** True when the text looks like a tree: a Problem or Session line and some branches. */
119export function isTree(text: string): boolean {
120  return /^(Problem|Session):/m.test(text) && /[├└]──/.test(text)
121}
122
123/** The tree's own title: its short head line (the second Problem line of a map), else the first. */
124export function treeTitle(text: string): string {
125  const heads = text.split('\n').filter(line => HEAD.test(line))
126  const pick = heads.length > 1 ? heads[1] : heads[0]
127
128  return (pick ?? 'Session').replace(HEAD, '').trim().slice(0, 60)
129}
130
131/** Colors for the state tags a table of contents ends its items with. */
132const TAG_COLORS: Record<string, string> = { seen: '#a6e3a1', live: '#89b4fa', tested: '#f9e2af' }
133
134/**
135 * Wraps one tree line to a width, carrying its branch glyphs down so the
136 * wrapped words stay under their branch.
137 */
138export function wrapTreeLine(line: string, width: number): string[] {
139  const chars = [...line]
140  if (chars.length <= width) return [line]
141  const prefix = /^[│├└─\s]*(?:\d+\.\s)?/.exec(line)?.[0] ?? ''
142  const carry = [...prefix].map(ch => (ch === '├' ? '│' : ch === '└' || ch === '─' ? ' ' : ch)).join('').replace(/\d+\.\s$/, m => ' '.repeat(m.length))
143  const words = chars.slice([...prefix].length).join('').split(/\s+/)
144  const out: string[] = []
145  let current = prefix
146  let used = [...prefix].length
147  let hasWords = false
148  for (const word of words) {
149    const size = [...word].length
150    if (hasWords && used + size > width) {
151      out.push(current.trimEnd())
152      current = carry
153      used = [...carry].length
154    }
155    current += `${word} `
156    used += size + 1
157    hasWords = true
158  }
159  out.push(current.trimEnd())
160
161  return out
162}
163
164export type TreeRun = { text: string; color?: string; bold?: boolean; dim?: boolean }
165
166/** One tree line as colored runs; `group` is the number of the group the line sits in, 0 above the first. */
167export function paintTreeLine(line: string, group: number): TreeRun[] {
168  if (HEAD.test(line)) return [{ text: line, bold: true }]
169  const glyphs = /^[│├└─\s]*/.exec(line)?.[0] ?? ''
170  const rest = line.slice(glyphs.length)
171  const runs: TreeRun[] = []
172  if (glyphs !== '') runs.push({ text: glyphs, color: GLYPH_COLOR })
173  if (rest === '') return runs.length > 0 ? runs : [{ text: ' ' }]
174  const heading = /^\d+\.\s/.test(rest)
175  const hue = GROUP_COLORS[(Math.max(group, 1) - 1) % GROUP_COLORS.length]
176  if (heading) {
177    const timed = /^(\d+\.\s)((?:[A-Z][a-z]{2} \d{1,2} )?\d{1,2}:\d{2}\s+)(.*)$/.exec(rest)
178    if (timed) runs.push({ text: timed[1]!, color: hue, bold: true }, { text: timed[2]!, color: GLYPH_COLOR }, { text: timed[3]!, color: hue, bold: true })
179    else runs.push({ text: rest, color: hue, bold: true })
180    return runs
181  }
182  if (rest === 'Open') {
183    runs.push({ text: rest, color: '#f38ba8', bold: true })
184    return runs
185  }
186  const tag = /^(.*?)(\s*)\[(seen|tested|live)\]$/.exec(rest)
187  if (tag) {
188    runs.push({ text: `${tag[1]}${tag[2]}` }, { text: `[${tag[3]}]`, color: TAG_COLORS[tag[3]!] })
189    return runs
190  }
191  const decided = /^Decided:/.test(rest)
192  runs.push(decided ? { text: rest, color: '#cba6f7' } : { text: rest })
193
194  return runs
195}
196
197/** The group number for each line: a "N." heading starts group N. */
198export function groupsOf(lines: string[]): number[] {
199  let group = 0
200
201  return lines.map(line => {
202    const m = /^[│├└─\s]*(\d+)\.\s/.exec(line)
203    if (m) group = Number(m[1])
204
205    return group
206  })
207}
208

1function normalizeBrTags(label){return(label.startsWith('"')&&label.endsWith('"')?label.slice(1,-1):label).replace(/<br\s*\/?>/gi,`
2`).replace(/\\n/g,`
3`).replace(/<\/?(?:sub|sup|small|mark)\s*>/gi,"").replace(/\*\*(.+?)\*\*/g,"<b>$1</b>").replace(/(?<!\*)\*([^\s*](?:[^*]*[^\s*])?)\*(?!\*)/g,"<i>$1</i>").replace(/~~(.+?)~~/g,"<s>$1</s>")}function parseMermaid(text){let lines=text.split(`
4`).map(l=>l.trim()).filter(l=>l.length>0&&!l.startsWith("%%"));if(lines.length===0)throw new Error("Empty mermaid diagram");let header=lines[0];return/^stateDiagram(-v2)?\s*$/i.test(header)?parseStateDiagram(lines):parseFlowchart(lines)}function parseFlowchart(lines){let headerMatch=lines[0].match(/^(?:graph|flowchart)\s+(TD|TB|LR|BT|RL)\s*$/i);if(!headerMatch)throw new Error(`Invalid mermaid header: "${lines[0]}". Expected "graph TD", "flowchart LR", "stateDiagram-v2", etc.`);let graph={direction:headerMatch[1].toUpperCase(),nodes:new Map,edges:[],subgraphs:[],classDefs:new Map,classAssignments:new Map,nodeStyles:new Map,linkStyles:new Map},subgraphStack=[];for(let i=1;i<lines.length;i++){let line=lines[i],classDefMatch=line.match(/^classDef\s+(\w+)\s+(.+)$/);if(classDefMatch){let name=classDefMatch[1],propsStr=classDefMatch[2],props=parseStyleProps(propsStr);graph.classDefs.set(name,props);continue}let classAssignMatch=line.match(/^class\s+([\w,-]+)\s+(\w+)$/);if(classAssignMatch){let nodeIds=classAssignMatch[1].split(",").map(s=>s.trim()),className=classAssignMatch[2];for(let id of nodeIds)graph.classAssignments.set(id,className);continue}let styleMatch=line.match(/^style\s+([\w,-]+)\s+(.+)$/);if(styleMatch){let nodeIds=styleMatch[1].split(",").map(s=>s.trim()),props=parseStyleProps(styleMatch[2]);for(let id of nodeIds)graph.nodeStyles.set(id,{...graph.nodeStyles.get(id),...props});continue}let linkStyleMatch=line.match(/^linkStyle\s+(default|[\d,\s]+)\s+(.+)$/);if(linkStyleMatch){let target=linkStyleMatch[1].trim(),props=parseStyleProps(linkStyleMatch[2]);if(target==="default")graph.linkStyles.set("default",{...graph.linkStyles.get("default"),...props});else{let indices=target.split(",").map(s=>parseInt(s.trim(),10));for(let idx of indices)isNaN(idx)||graph.linkStyles.set(idx,{...graph.linkStyles.get(idx),...props})}continue}let dirMatch=line.match(/^direction\s+(TD|TB|LR|BT|RL)\s*$/i);if(dirMatch&&subgraphStack.length>0){subgraphStack[subgraphStack.length-1].direction=dirMatch[1].toUpperCase();continue}let subgraphMatch=line.match(/^subgraph\s+(.+)$/);if(subgraphMatch){let rest=subgraphMatch[1].trim(),bracketMatch=rest.match(/^([\w-]+)\s*\[(.+)\]$/),id,label;bracketMatch?(id=bracketMatch[1],label=normalizeBrTags(bracketMatch[2])):(label=normalizeBrTags(rest),id=rest.replace(/\s+/g,"_").replace(/[^\w]/g,""));let sg={id,label,nodeIds:[],children:[]};subgraphStack.push(sg);continue}if(line==="end"){let completed=subgraphStack.pop();completed&&(subgraphStack.length>0?subgraphStack[subgraphStack.length-1].children.push(completed):graph.subgraphs.push(completed));continue}parseEdgeLine(line,graph,subgraphStack)}return graph}function parseStateDiagram(lines){let graph={direction:"TD",nodes:new Map,edges:[],subgraphs:[],classDefs:new Map,classAssignments:new Map,nodeStyles:new Map,linkStyles:new Map},compositeStack=[],compositeStateIds=new Set,startCount=0,endCount=0;for(let i=1;i<lines.length;i++){let line=lines[i],dirMatch=line.match(/^direction\s+(TD|TB|LR|BT|RL)\s*$/i);if(dirMatch){compositeStack.length>0?compositeStack[compositeStack.length-1].direction=dirMatch[1].toUpperCase():graph.direction=dirMatch[1].toUpperCase();continue}let linkStyleMatch=line.match(/^linkStyle\s+(default|[\d,\s]+)\s+(.+)$/);if(linkStyleMatch){let target=linkStyleMatch[1].trim(),props=parseStyleProps(linkStyleMatch[2]);if(target==="default")graph.linkStyles.set("default",{...graph.linkStyles.get("default"),...props});else{let indices=target.split(",").map(s=>parseInt(s.trim(),10));for(let idx of indices)isNaN(idx)||graph.linkStyles.set(idx,{...graph.linkStyles.get(idx),...props})}continue}let compositeMatch=line.match(/^state\s+(?:"([^"]+)"\s+as\s+)?([\w\p{L}]+)\s*\{$/u);if(compositeMatch){let label=compositeMatch[1]??compositeMatch[2],id=compositeMatch[2],sg={id,label,nodeIds:[],children:[]};compositeStack.push(sg),compositeStateIds.add(id),graph.nodes.delete(id);continue}if(line==="}"){let completed=compositeStack.pop();completed&&(compositeStack.length>0?compositeStack[compositeStack.length-1].children.push(completed):graph.subgraphs.push(completed));continue}let stateAliasMatch=line.match(/^state\s+"([^"]+)"\s+as\s+([\w\p{L}]+)\s*$/u);if(stateAliasMatch){let label=normalizeBrTags(stateAliasMatch[1]),id=stateAliasMatch[2];registerStateNode(graph,compositeStack,{id,label,shape:"rounded"});continue}let transitionMatch=line.match(/^(\[\*\]|[\w\p{L}-]+)\s*(-->)\s*(\[\*\]|[\w\p{L}-]+)(?:\s*:\s*(.+))?$/u);if(transitionMatch){let sourceId=transitionMatch[1],targetId=transitionMatch[3],rawTransitionLabel=transitionMatch[4]?.trim(),edgeLabel=rawTransitionLabel?normalizeBrTags(rawTransitionLabel):void 0;sourceId==="[*]"?(startCount++,sourceId=`_start${startCount>1?startCount:""}`,registerStateNode(graph,compositeStack,{id:sourceId,label:"",shape:"state-start"})):compositeStateIds.has(sourceId)||ensureStateNode(graph,compositeStack,sourceId),targetId==="[*]"?(endCount++,targetId=`_end${endCount>1?endCount:""}`,registerStateNode(graph,compositeStack,{id:targetId,label:"",shape:"state-end"})):compositeStateIds.has(targetId)||ensureStateNode(graph,compositeStack,targetId),graph.edges.push({source:sourceId,target:targetId,label:edgeLabel,style:"solid",hasArrowStart:!1,hasArrowEnd:!0});continue}let stateDescMatch=line.match(/^([\w\p{L}-]+)\s*:\s*(.+)$/u);if(stateDescMatch){let id=stateDescMatch[1],label=normalizeBrTags(stateDescMatch[2].trim());registerStateNode(graph,compositeStack,{id,label,shape:"rounded"});continue}}return graph}function registerStateNode(graph,compositeStack,node){if(!graph.nodes.has(node.id)&&graph.nodes.set(node.id,node),compositeStack.length>0){let current=compositeStack[compositeStack.length-1];current.nodeIds.includes(node.id)||current.nodeIds.push(node.id)}}function ensureStateNode(graph,compositeStack,id){if(!graph.nodes.has(id))registerStateNode(graph,compositeStack,{id,label:id,shape:"rounded"});else if(compositeStack.length>0){let current=compositeStack[compositeStack.length-1];current.nodeIds.includes(id)||current.nodeIds.push(id)}}function parseStyleProps(propsStr){let cleaned=propsStr.replace(/;\s*$/,""),props={};for(let pair of cleaned.split(",")){let colonIdx=pair.indexOf(":");if(colonIdx>0){let key=pair.slice(0,colonIdx).trim(),val=pair.slice(colonIdx+1).trim();key&&val&&(props[key]=val)}}return props}var ARROW_REGEX=/^(<)?(-->|-.->|==>|---|-\.-|===)(?:\|([^|]*)\|)?/,TEXT_ARROW_REGEX=/^(<)?(--|-\.|==)\s+(.+?)\s+(-->|---|\.\->|-\.\-|==>|===)/,NODE_PATTERNS=[{regex:/^([\w-]+)\(\(\((.+?)\)\)\)/,shape:"doublecircle"},{regex:/^([\w-]+)\(\[(.+?)\]\)/,shape:"stadium"},{regex:/^([\w-]+)\(\((.+?)\)\)/,shape:"circle"},{regex:/^([\w-]+)\[\[(.+?)\]\]/,shape:"subroutine"},{regex:/^([\w-]+)\[\((.+?)\)\]/,shape:"cylinder"},{regex:/^([\w-]+)\[\/(.+?)\\\]/,shape:"trapezoid"},{regex:/^([\w-]+)\[\\(.+?)\/\]/,shape:"trapezoid-alt"},{regex:/^([\w-]+)>(.+?)\]/,shape:"asymmetric"},{regex:/^([\w-]+)\{\{(.+?)\}\}/,shape:"hexagon"},{regex:/^([\w-]+)\[(.+?)\]/,shape:"rectangle"},{regex:/^([\w-]+)\((.+?)\)/,shape:"rounded"},{regex:/^([\w-]+)\{(.+?)\}/,shape:"diamond"}],BARE_NODE_REGEX=/^([\w-]+)/,CLASS_SHORTHAND_REGEX=/^:::([\w][\w-]*)/;function parseEdgeLine(line,graph,subgraphStack){let remaining=line.trim(),firstGroup=consumeNodeGroup(remaining,graph,subgraphStack);if(!firstGroup||firstGroup.ids.length===0)return;remaining=firstGroup.remaining.trim();let prevGroupIds=firstGroup.ids;for(;remaining.length>0;){let hasArrowStart,style,hasArrowEnd,edgeLabel,arrowMatch=remaining.match(ARROW_REGEX);if(arrowMatch){hasArrowStart=!!arrowMatch[1];let arrowOp=arrowMatch[2],rawEdgeLabel=arrowMatch[3]?.trim();edgeLabel=rawEdgeLabel?normalizeBrTags(rawEdgeLabel):void 0,remaining=remaining.slice(arrowMatch[0].length).trim(),style=arrowStyleFromOp(arrowOp),hasArrowEnd=arrowOp.endsWith(">")}else{let textMatch=remaining.match(TEXT_ARROW_REGEX);if(!textMatch)break;hasArrowStart=!!textMatch[1];let rawLabel=textMatch[3].trim();edgeLabel=rawLabel?normalizeBrTags(rawLabel):void 0;let openOp=textMatch[2],closeOp=textMatch[4];remaining=remaining.slice(textMatch[0].length).trim(),style=textArrowStyleFromOps(openOp,closeOp),hasArrowEnd=closeOp.endsWith(">")}let nextGroup=consumeNodeGroup(remaining,graph,subgraphStack);if(!nextGroup||nextGroup.ids.length===0)break;remaining=nextGroup.remaining.trim();for(let sourceId of prevGroupIds)for(let targetId of nextGroup.ids)graph.edges.push({source:sourceId,target:targetId,label:edgeLabel,style,hasArrowStart,hasArrowEnd});prevGroupIds=nextGroup.ids}}function consumeNodeGroup(text,graph,subgraphStack){let first=consumeNode(text,graph,subgraphStack);if(!first)return null;let ids=[first.id],remaining=first.remaining.trim();for(;remaining.startsWith("&");){remaining=remaining.slice(1).trim();let next=consumeNode(remaining,graph,subgraphStack);if(!next)break;ids.push(next.id),remaining=next.remaining.trim()}return{ids,remaining}}function consumeNode(text,graph,subgraphStack){let id=null,remaining=text;for(let{regex,shape}of NODE_PATTERNS){let match=text.match(regex);if(match){id=match[1];let label=normalizeBrTags(match[2]);registerNode(graph,subgraphStack,{id,label,shape}),remaining=text.slice(match[0].length);break}}if(id===null){let bareMatch=text.match(BARE_NODE_REGEX);bareMatch&&(id=bareMatch[1],graph.nodes.has(id)||registerNode(graph,subgraphStack,{id,label:id,shape:"rectangle"}),remaining=text.slice(bareMatch[0].length))}if(id===null)return null;let classMatch=remaining.match(CLASS_SHORTHAND_REGEX);return classMatch&&(graph.classAssignments.set(id,classMatch[1]),remaining=remaining.slice(classMatch[0].length)),{id,remaining}}function registerNode(graph,subgraphStack,node){!graph.nodes.has(node.id)&&graph.nodes.set(node.id,node),trackInSubgraph(subgraphStack,node.id)}function trackInSubgraph(subgraphStack,nodeId){if(subgraphStack.length>0){let current=subgraphStack[subgraphStack.length-1];current.nodeIds.includes(nodeId)||current.nodeIds.push(nodeId)}}function arrowStyleFromOp(op){return op==="-.->"||op==="-.-"?"dotted":op==="==>"||op==="==="?"thick":"solid"}function textArrowStyleFromOps(openOp,closeOp){return openOp==="-."||closeOp===".->"||closeOp==="-.-"?"dotted":openOp==="=="||closeOp==="==>"||closeOp==="==="?"thick":"solid"}var Up={x:1,y:0},Down={x:1,y:2},Left={x:0,y:1},Right={x:2,y:1},UpperRight={x:2,y:0},UpperLeft={x:0,y:0},LowerRight={x:2,y:2},LowerLeft={x:0,y:2},Middle={x:1,y:1};function gridCoordEquals(a,b){return a.x===b.x&&a.y===b.y}function drawingCoordEquals(a,b){return a.x===b.x&&a.y===b.y}function gridCoordDirection(c,dir){return{x:c.x+dir.x,y:c.y+dir.y}}function gridKey(c){return`${c.x},${c.y}`}var EMPTY_STYLE={name:"",styles:{}};var DEFAULT_ASCII_THEME={fg:"#27272a",border:"#a1a1aa",line:"#71717a",arrow:"#52525b",corner:"#71717a",junction:"#a1a1aa"};function detectColorMode(){let proc=globalThis.process;if(proc){if(!proc.stdout?.isTTY)return"none";let colorTerm=proc.env?.COLORTERM?.toLowerCase()??"",term=proc.env?.TERM?.toLowerCase()??"";return colorTerm==="truecolor"||colorTerm==="24bit"?"truecolor":term.includes("256color")||term.includes("256")?"ansi256":term&&term!=="dumb"?"ansi16":"none"}return typeof document<"u"?"html":"none"}function parseHex(hex){let h=hex.replace("#","");return h.length===3?{r:parseInt(h[0]+h[0],16),g:parseInt(h[1]+h[1],16),b:parseInt(h[2]+h[2],16)}:{r:parseInt(h.substring(0,2),16),g:parseInt(h.substring(2,4),16),b:parseInt(h.substring(4,6),16)}}var ESC="\x1B[",RESET=`${ESC}0m`;function truecolorFg(hex){let{r,g,b}=parseHex(hex);return`${ESC}38;2;${r};${g};${b}m`}function rgbTo256(r,g,b){let avg=(r+g+b)/3;if(Math.max(Math.abs(r-avg),Math.abs(g-avg),Math.abs(b-avg))<10){let gray=Math.round(avg/255*23);return 232+Math.min(23,Math.max(0,gray))}let toIndex=v=>v<48?0:v<115?1:Math.min(5,Math.floor((v-35)/40)),ri=toIndex(r),gi=toIndex(g),bi=toIndex(b);return 16+36*ri+6*gi+bi}function ansi256Fg(hex){let{r,g,b}=parseHex(hex),index=rgbTo256(r,g,b);return`${ESC}38;5;${index}m`}function ansi16Fg(hex){let{r,g,b}=parseHex(hex),luma=.299*r+.587*g+.114*b,bright=luma>100?0:60,code;return r>180&&g<100&&b<100?code=31:g>180&&r<100&&b<100?code=32:r>150&&g>150&&b<100?code=33:b>180&&r<100&&g<100?code=34:r>150&&b>150&&g<100?code=35:g>150&&b>150&&r<100?code=36:luma>200?code=37:luma<50?code=30:code=37,`${ESC}${code+bright}m`}function escapeHtml(text){return text.replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/>/g,"&gt;")}function htmlSpan(hex,text){return`<span style="color:${hex}">${escapeHtml(text)}</span>`}function getRoleColor(role,theme){switch(role){case"text":return theme.fg;case"border":return theme.border;case"line":return theme.line;case"arrow":return theme.arrow;case"corner":return theme.corner??theme.line;case"junction":return theme.junction??theme.border;default:return theme.fg}}function getAnsiColor(role,theme,mode){if(mode==="none")return"";let hex=getRoleColor(role,theme);switch(mode){case"truecolor":return truecolorFg(hex);case"ansi256":return ansi256Fg(hex);case"ansi16":return ansi16Fg(hex);default:return""}}function colorizeLine(chars,roles,theme,mode){if(mode==="none")return chars.join("");if(mode==="html")return colorizeLineHtml(chars,roles,theme);let result="",currentRole=null,buffer="";for(let i=0;i<chars.length;i++){let char=chars[i],role=roles[i]??null;if(char===" "){buffer.length>0&&(currentRole!==null?result+=getAnsiColor(currentRole,theme,mode)+buffer+RESET:result+=buffer,buffer="",currentRole=null),result+=char;continue}if(role===currentRole){buffer+=char;continue}buffer.length>0&&(currentRole!==null?result+=getAnsiColor(currentRole,theme,mode)+buffer+RESET:result+=buffer),buffer=char,currentRole=role}return buffer.length>0&&currentRole!==null?result+=getAnsiColor(currentRole,theme,mode)+buffer+RESET:buffer.length>0&&(result+=buffer),result}function colorizeLineHtml(chars,roles,theme){let result="",currentRole=null,buffer="",flush=()=>{buffer.length!==0&&(currentRole!==null?result+=htmlSpan(getRoleColor(currentRole,theme),buffer):result+=escapeHtml(buffer),buffer="",currentRole=null)};for(let i=0;i<chars.length;i++){let char=chars[i],role=roles[i]??null;if(char===" "){flush(),result+=" ";continue}if(role===currentRole){buffer+=char;continue}flush(),buffer=char,currentRole=role}return flush(),result}function colorizeText(text,hex,mode){if(mode==="none"||text.length===0)return text;if(mode==="html")return htmlSpan(hex,text);let code;switch(mode){case"truecolor":code=truecolorFg(hex);break;case"ansi256":code=ansi256Fg(hex);break;case"ansi16":code=ansi16Fg(hex);break;default:return text}return`${code}${text}${RESET}`}function mkCanvas(x,y){let canvas=[];for(let i=0;i<=x;i++){let col=[];for(let j=0;j<=y;j++)col.push(" ");canvas.push(col)}return canvas}function copyCanvas(source){let[maxX,maxY]=getCanvasSize(source);return mkCanvas(maxX,maxY)}function mkRoleCanvas(x,y){let roleCanvas=[];for(let i=0;i<=x;i++){let col=[];for(let j=0;j<=y;j++)col.push(null);roleCanvas.push(col)}return roleCanvas}function increaseRoleCanvasSize(roleCanvas,newX,newY){let currX=roleCanvas.length-1,currY=(roleCanvas[0]?.length??1)-1,targetX=Math.max(newX,currX),targetY=Math.max(newY,currY),grown=mkRoleCanvas(targetX,targetY);for(let x=0;x<grown.length;x++)for(let y=0;y<grown[0].length;y++)x<roleCanvas.length&&y<roleCanvas[0].length&&(grown[x][y]=roleCanvas[x][y]);return roleCanvas.length=0,roleCanvas.push(...grown),roleCanvas}function setRole(roleCanvas,x,y,role){(x>=roleCanvas.length||y>=(roleCanvas[0]?.length??0))&&increaseRoleCanvasSize(roleCanvas,x,y),roleCanvas[x][y]=role}function getCanvasSize(canvas){return[canvas.length-1,(canvas[0]?.length??1)-1]}function increaseSize(canvas,newX,newY){let[currX,currY]=getCanvasSize(canvas),targetX=Math.max(newX,currX),targetY=Math.max(newY,currY),grown=mkCanvas(targetX,targetY);for(let x=0;x<grown.length;x++)for(let y=0;y<grown[0].length;y++)x<canvas.length&&y<canvas[0].length&&(grown[x][y]=canvas[x][y]);return canvas.length=0,canvas.push(...grown),canvas}var JUNCTION_CHARS=new Set(["\u2500","\u2502","\u250C","\u2510","\u2514","\u2518","\u251C","\u2524","\u252C","\u2534","\u253C","\u2574","\u2575","\u2576","\u2577"]);function clearLabelGaps(canvas,label){for(let y=0;y<(label[0]?.length??0);y++){let xs=label.map((col,x)=>col[y]!==" "?x:-1).filter(x=>x>=0);if(xs.length!==0)for(let x=xs[0];x<=xs[xs.length-1];x++)label[x][y]===" "&&!isAlphanumeric(canvas[x][y])&&(canvas[x][y]=" ")}}function isJunctionChar(c){return JUNCTION_CHARS.has(c)}function isAlphanumeric(c){return/^[a-zA-Z0-9]$/.test(c)}var JUNCTION_MAP={"\u2500":{"\u2502":"\u253C","\u250C":"\u252C","\u2510":"\u252C","\u2514":"\u2534","\u2518":"\u2534","\u251C":"\u253C","\u2524":"\u253C","\u252C":"\u252C","\u2534":"\u2534"},"\u2502":{"\u2500":"\u253C","\u250C":"\u251C","\u2510":"\u2524","\u2514":"\u251C","\u2518":"\u2524","\u251C":"\u251C","\u2524":"\u2524","\u252C":"\u253C","\u2534":"\u253C"},"\u250C":{"\u2500":"\u252C","\u2502":"\u251C","\u2510":"\u252C","\u2514":"\u251C","\u2518":"\u253C","\u251C":"\u251C","\u2524":"\u253C","\u252C":"\u252C","\u2534":"\u253C"},"\u2510":{"\u2500":"\u252C","\u2502":"\u2524","\u250C":"\u252C","\u2514":"\u253C","\u2518":"\u2524","\u251C":"\u253C","\u2524":"\u2524","\u252C":"\u252C","\u2534":"\u253C"},"\u2514":{"\u2500":"\u2534","\u2502":"\u251C","\u250C":"\u251C","\u2510":"\u253C","\u2518":"\u2534","\u251C":"\u251C","\u2524":"\u253C","\u252C":"\u253C","\u2534":"\u2534"},"\u2518":{"\u2500":"\u2534","\u2502":"\u2524","\u250C":"\u253C","\u2510":"\u2524","\u2514":"\u2534","\u251C":"\u253C","\u2524":"\u2524","\u252C":"\u253C","\u2534":"\u2534"},"\u251C":{"\u2500":"\u253C","\u2502":"\u251C","\u250C":"\u251C","\u2510":"\u253C","\u2514":"\u251C","\u2518":"\u253C","\u2524":"\u253C","\u252C":"\u253C","\u2534":"\u253C"},"\u2524":{"\u2500":"\u253C","\u2502":"\u2524","\u250C":"\u253C","\u2510":"\u2524","\u2514":"\u253C","\u2518":"\u2524","\u251C":"\u253C","\u252C":"\u253C","\u2534":"\u253C"},"\u252C":{"\u2500":"\u252C","\u2502":"\u253C","\u250C":"\u252C","\u2510":"\u252C","\u2514":"\u253C","\u2518":"\u253C","\u251C":"\u253C","\u2524":"\u253C","\u2534":"\u253C"},"\u2534":{"\u2500":"\u2534","\u2502":"\u253C","\u250C":"\u253C","\u2510":"\u253C","\u2514":"\u2534","\u2518":"\u2534","\u251C":"\u253C","\u2524":"\u253C","\u252C":"\u253C"}};function mergeJunctions(c1,c2){return JUNCTION_MAP[c1]?.[c2]??c1}function mergeCanvases(base,offset,useAscii,...overlays){let[maxX,maxY]=getCanvasSize(base);for(let overlay of overlays){let[oX,oY]=getCanvasSize(overlay);maxX=Math.max(maxX,oX+offset.x),maxY=Math.max(maxY,oY+offset.y)}let merged=mkCanvas(maxX,maxY);for(let x=0;x<=maxX;x++)for(let y=0;y<=maxY;y++)x<base.length&&y<base[0].length&&(merged[x][y]=base[x][y]);for(let overlay of overlays)for(let x=0;x<overlay.length;x++)for(let y=0;y<overlay[0].length;y++){let c=overlay[x][y];if(c!==" "){let mx=x+offset.x,my=y+offset.y,current=merged[mx][my];!useAscii&&isJunctionChar(c)&&isJunctionChar(current)?merged[mx][my]=mergeJunctions(current,c):isAlphanumeric(current)&&isAlphanumeric(c)||(merged[mx][my]=c)}}return merged}function canvasToString(canvas,options){let[maxX,maxY]=getCanvasSize(canvas),lines=[],roleCanvas=options?.roleCanvas,colorMode=options?.colorMode??"none",theme=options?.theme??DEFAULT_ASCII_THEME;for(let y=0;y<=maxY;y++)if(colorMode==="none"||!roleCanvas){let line="";for(let x=0;x<=maxX;x++)line+=canvas[x][y];lines.push(line)}else{let chars=[],roles=[];for(let x=0;x<=maxX;x++)chars.push(canvas[x][y]),roles.push(roleCanvas[x]?.[y]??null);lines.push(colorizeLine(chars,roles,theme,colorMode))}return lines.join(`
5`)}var VERTICAL_FLIP_MAP={"\u25B2":"\u25BC","\u25BC":"\u25B2","\u25E4":"\u25E3","\u25E3":"\u25E4","\u25E5":"\u25E2","\u25E2":"\u25E5","^":"v",v:"^","\u250C":"\u2514","\u2514":"\u250C","\u2510":"\u2518","\u2518":"\u2510","\u252C":"\u2534","\u2534":"\u252C","\u2575":"\u2577","\u2577":"\u2575"};function flipCanvasVertically(canvas){for(let col of canvas)col.reverse();for(let col of canvas)for(let y=0;y<col.length;y++){let flipped=VERTICAL_FLIP_MAP[col[y]];flipped&&(col[y]=flipped)}return canvas}function flipRoleCanvasVertically(roleCanvas){for(let col of roleCanvas)col.reverse();return roleCanvas}function drawText(canvas,start,text,forceOverwrite=!1){increaseSize(canvas,start.x+text.length,start.y);for(let i=0;i<text.length;i++){let x=start.x+i,current=canvas[x][start.y];(forceOverwrite||current===" ")&&(canvas[x][start.y]=text[i])}}function setCanvasSizeToGrid(canvas,columnWidth,rowHeight){let maxX=0,maxY=0;for(let w of columnWidth.values())maxX+=w;for(let h of rowHeight.values())maxY+=h;increaseSize(canvas,maxX-1,maxY-1)}function setRoleCanvasSizeToGrid(roleCanvas,columnWidth,rowHeight){let maxX=0,maxY=0;for(let w of columnWidth.values())maxX+=w;for(let h of rowHeight.values())maxY+=h;increaseRoleCanvasSize(roleCanvas,maxX-1,maxY-1)}function convertToAsciiGraph(parsed,config){let nodeMap=new Map,index=0;for(let[id,mNode]of parsed.nodes){let asciiNode={name:id,displayLabel:mNode.label,shape:mNode.shape,index,gridCoord:null,drawingCoord:null,drawing:null,drawn:!1,styleClassName:"",styleClass:EMPTY_STYLE};nodeMap.set(id,asciiNode),index++}let nodes=[...nodeMap.values()],edges=[];for(let mEdge of parsed.edges){let from=nodeMap.get(mEdge.source),to=nodeMap.get(mEdge.target);!from||!to||edges.push({from,to,text:mEdge.label??"",path:[],labelLine:[],startDir:{x:0,y:0},endDir:{x:0,y:0},style:mEdge.style,hasArrowStart:mEdge.hasArrowStart,hasArrowEnd:mEdge.hasArrowEnd})}let subgraphs=[];for(let mSg of parsed.subgraphs)convertSubgraph(mSg,null,nodeMap,subgraphs);deduplicateSubgraphNodes(parsed.subgraphs,subgraphs,nodeMap,parsed);for(let[nodeId,className]of parsed.classAssignments){let node=nodeMap.get(nodeId),classDef=parsed.classDefs.get(className);node&&classDef&&(node.styleClassName=className,node.styleClass={name:className,styles:classDef})}return{nodes,edges,canvas:mkCanvas(0,0),roleCanvas:mkRoleCanvas(0,0),grid:new Map,columnWidth:new Map,rowHeight:new Map,subgraphs,config,offsetX:0,offsetY:0,bundles:[]}}function convertSubgraph(mSg,parent,nodeMap,allSubgraphs){let normalizedDirection;mSg.direction&&(normalizedDirection=mSg.direction==="LR"||mSg.direction==="RL"?"LR":"TD");let sg={name:mSg.label,nodes:[],parent,children:[],minX:0,minY:0,maxX:0,maxY:0,direction:normalizedDirection};for(let nodeId of mSg.nodeIds){let node=nodeMap.get(nodeId);node&&sg.nodes.push(node)}allSubgraphs.push(sg);for(let childMSg of mSg.children){let child=convertSubgraph(childMSg,sg,nodeMap,allSubgraphs);sg.children.push(child);for(let childNode of child.nodes)sg.nodes.includes(childNode)||sg.nodes.push(childNode)}return sg}function deduplicateSubgraphNodes(mermaidSubgraphs,asciiSubgraphs,nodeMap,parsed){let sgMap=new Map;buildSgMap(mermaidSubgraphs,asciiSubgraphs,sgMap);let nodeOwner=new Map;function claimNodes(mSg){let asciiSg=sgMap.get(mSg);if(asciiSg){for(let child of mSg.children)claimNodes(child);for(let nodeId of mSg.nodeIds)nodeOwner.has(nodeId)||nodeOwner.set(nodeId,asciiSg)}}for(let mSg of mermaidSubgraphs)claimNodes(mSg);for(let asciiSg of asciiSubgraphs)asciiSg.nodes=asciiSg.nodes.filter(node=>{let nodeId;for(let[id,n]of nodeMap)if(n===node){nodeId=id;break}if(!nodeId)return!1;let owner=nodeOwner.get(nodeId);return owner?isAncestorOrSelf(asciiSg,owner):!0})}function isAncestorOrSelf(candidate,target){let current=target;for(;current!==null;){if(current===candidate)return!0;current=current.parent}return!1}function buildSgMap(mSgs,aSgs,result){let flatMermaid=[];function flatten(sgs){for(let sg of sgs)flatMermaid.push(sg),flatten(sg.children)}flatten(mSgs);for(let i=0;i<flatMermaid.length&&i<aSgs.length;i++)result.set(flatMermaid[i],aSgs[i])}var MinHeap=class{items=[];get length(){return this.items.length}push(item){this.items.push(item),this.bubbleUp(this.items.length-1)}pop(){if(this.items.length===0)return;let top=this.items[0],last=this.items.pop();return this.items.length>0&&(this.items[0]=last,this.sinkDown(0)),top}bubbleUp(i){for(;i>0;){let parent=i-1>>1;if(this.items[i].priority<this.items[parent].priority)[this.items[i],this.items[parent]]=[this.items[parent],this.items[i]],i=parent;else break}}sinkDown(i){let n=this.items.length;for(;;){let smallest=i,left=2*i+1,right=2*i+2;if(left<n&&this.items[left].priority<this.items[smallest].priority&&(smallest=left),right<n&&this.items[right].priority<this.items[smallest].priority&&(smallest=right),smallest!==i)[this.items[i],this.items[smallest]]=[this.items[smallest],this.items[i]],i=smallest;else break}}};function heuristic(a,b){let absX=Math.abs(a.x-b.x),absY=Math.abs(a.y-b.y);return absX===0||absY===0?absX+absY:absX+absY+1}var MOVE_DIRS=[{x:1,y:0},{x:-1,y:0},{x:0,y:1},{x:0,y:-1}];function isFreeInGrid(grid,c){return c.x<0||c.y<0?!1:!grid.has(gridKey(c))}function getPath(grid,from,to){let pq=new MinHeap;pq.push({coord:from,priority:0});let costSoFar=new Map;costSoFar.set(gridKey(from),0);let cameFrom=new Map;for(cameFrom.set(gridKey(from),null);pq.length>0;){let current=pq.pop().coord;if(gridCoordEquals(current,to)){let path=[],c=current;for(;c!==null;)path.unshift(c),c=cameFrom.get(gridKey(c))??null;return path}let currentCost=costSoFar.get(gridKey(current));for(let dir of MOVE_DIRS){let next={x:current.x+dir.x,y:current.y+dir.y};if(!isFreeInGrid(grid,next)&&!gridCoordEquals(next,to))continue;let newCost=currentCost+1,nextKey=gridKey(next),existingCost=costSoFar.get(nextKey);if(existingCost===void 0||newCost<existingCost){costSoFar.set(nextKey,newCost);let priority=newCost+heuristic(next,to);pq.push({coord:next,priority}),cameFrom.set(nextKey,current)}}}return null}function mergePath(path){if(path.length<=2)return path;let toRemove=new Set,step0=path[0],step1=path[1];for(let idx=2;idx<path.length;idx++){let step2=path[idx],prevDx=step1.x-step0.x,prevDy=step1.y-step0.y,dx=step2.x-step1.x,dy=step2.y-step1.y;prevDx===dx&&prevDy===dy&&toRemove.add(idx-1),step0=step1,step1=step2}return path.filter((_,i)=>!toRemove.has(i))}function getOpposite(d){return d===Up?Down:d===Down?Up:d===Left?Right:d===Right?Left:d===UpperRight?LowerLeft:d===UpperLeft?LowerRight:d===LowerRight?UpperLeft:d===LowerLeft?UpperRight:Middle}function dirEquals(a,b){return a.x===b.x&&a.y===b.y}function determineDirection(from,to){return from.x===to.x?from.y<to.y?Down:Up:from.y===to.y?from.x<to.x?Right:Left:from.x<to.x?from.y<to.y?LowerRight:UpperRight:from.y<to.y?LowerLeft:UpperLeft}function selfReferenceDirection(graphDirection){return graphDirection==="LR"?[Right,Down,Down,Right]:[Down,Right,Right,Down]}function determineStartAndEndDir(edge,graphDirection){if(edge.from===edge.to)return selfReferenceDirection(graphDirection);let d=determineDirection(edge.from.gridCoord,edge.to.gridCoord),preferredDir,preferredOppositeDir,alternativeDir,alternativeOppositeDir,isBackwards=graphDirection==="LR"?dirEquals(d,Left)||dirEquals(d,UpperLeft)||dirEquals(d,LowerLeft):dirEquals(d,Up)||dirEquals(d,UpperLeft)||dirEquals(d,UpperRight);return dirEquals(d,LowerRight)?graphDirection==="LR"?(preferredDir=Down,preferredOppositeDir=Left,alternativeDir=Right,alternativeOppositeDir=Up):(preferredDir=Right,preferredOppositeDir=Up,alternativeDir=Down,alternativeOppositeDir=Left):dirEquals(d,UpperRight)?graphDirection==="LR"?(preferredDir=Up,preferredOppositeDir=Left,alternativeDir=Right,alternativeOppositeDir=Down):(preferredDir=Right,preferredOppositeDir=Down,alternativeDir=Up,alternativeOppositeDir=Left):dirEquals(d,LowerLeft)?graphDirection==="LR"?(preferredDir=Down,preferredOppositeDir=Down,alternativeDir=Left,alternativeOppositeDir=Up):(preferredDir=Left,preferredOppositeDir=Up,alternativeDir=Down,alternativeOppositeDir=Right):dirEquals(d,UpperLeft)?graphDirection==="LR"?(preferredDir=Down,preferredOppositeDir=Down,alternativeDir=Left,alternativeOppositeDir=Down):(preferredDir=Right,preferredOppositeDir=Right,alternativeDir=Up,alternativeOppositeDir=Right):isBackwards?graphDirection==="LR"&&dirEquals(d,Left)?(preferredDir=Down,preferredOppositeDir=Down,alternativeDir=Left,alternativeOppositeDir=Right):graphDirection==="TD"&&dirEquals(d,Up)?(preferredDir=Right,preferredOppositeDir=Right,alternativeDir=Up,alternativeOppositeDir=Down):(preferredDir=d,preferredOppositeDir=getOpposite(d),alternativeDir=d,alternativeOppositeDir=getOpposite(d)):(preferredDir=d,preferredOppositeDir=getOpposite(d),alternativeDir=d,alternativeOppositeDir=getOpposite(d)),[preferredDir,preferredOppositeDir,alternativeDir,alternativeOppositeDir]}function determinePath(graph,edge){let sourceSg=getNodeSubgraph(graph,edge.from),targetSg=getNodeSubgraph(graph,edge.to),effectiveDir=sourceSg&&sourceSg===targetSg&&sourceSg.direction?sourceSg.direction:graph.config.graphDirection,[preferredDir,preferredOppositeDir,alternativeDir,alternativeOppositeDir]=determineStartAndEndDir(edge,effectiveDir),prefFrom=gridCoordDirection(edge.from.gridCoord,preferredDir),prefTo=gridCoordDirection(edge.to.gridCoord,preferredOppositeDir),preferredPath=getPath(graph.grid,prefFrom,prefTo),altFrom=gridCoordDirection(edge.from.gridCoord,alternativeDir),altTo=gridCoordDirection(edge.to.gridCoord,alternativeOppositeDir),alternativePath=getPath(graph.grid,altFrom,altTo);if(preferredPath!==null&&alternativePath!==null){preferredPath=mergePath(preferredPath),alternativePath=mergePath(alternativePath),preferredPath.length<=alternativePath.length?(edge.startDir=preferredDir,edge.endDir=preferredOppositeDir,edge.path=preferredPath):(edge.startDir=alternativeDir,edge.endDir=alternativeOppositeDir,edge.path=alternativePath);return}if(preferredPath!==null){edge.startDir=preferredDir,edge.endDir=preferredOppositeDir,edge.path=mergePath(preferredPath);return}if(alternativePath!==null){edge.startDir=alternativeDir,edge.endDir=alternativeOppositeDir,edge.path=mergePath(alternativePath);return}edge.startDir=preferredDir,edge.endDir=preferredOppositeDir,edge.path=[prefFrom,prefTo]}function determineLabelLine(graph,edge){if(edge.text.length===0)return;let lenLabel=edge.text.length,pathLen=edge.path.length,isVerticalFlow=graph.config.graphDirection==="TD",segments=[];for(let i=1;i<pathLen;i++){let p1=edge.path[i-1],p2=edge.path[i],line=[p1,p2],width=calculateLineWidth(graph,line),isVertical=p1.x===p2.x;segments.push({line,width,index:i,isVertical})}let suitableSegments=segments.filter(s=>s.width>=lenLabel&&s.index>1),largestLine;if(suitableSegments.length>0)suitableSegments.sort((a,b)=>b.index-a.index),largestLine=suitableSegments[0].line;else{let fallbackSegments=segments.filter(s=>s.width>=lenLabel);fallbackSegments.length>0?(fallbackSegments.sort((a,b)=>b.index-a.index),largestLine=fallbackSegments[0].line):(segments.sort((a,b)=>b.width-a.width),largestLine=segments[0]?.line??[edge.path[0],edge.path[1]])}let minX=Math.min(largestLine[0].x,largestLine[1].x),maxX=Math.max(largestLine[0].x,largestLine[1].x),middleX=minX+Math.floor((maxX-minX)/2),current=graph.columnWidth.get(middleX)??0;graph.columnWidth.set(middleX,Math.max(current,lenLabel+2)),edge.labelLine=[largestLine[0],largestLine[1]]}function calculateLineWidth(graph,line){let total=0,startX=Math.min(line[0].x,line[1].x),endX=Math.max(line[0].x,line[1].x);for(let x=startX;x<=endX;x++)total+=graph.columnWidth.get(x)??0;return total}function analyzeEdgeBundles(graph){if(graph.config.graphDirection!=="TD")return[];let bundles=[],bundledEdges=new Set,edgesByTarget=new Map;for(let edge of graph.edges){if(edge.from===edge.to)continue;let existing=edgesByTarget.get(edge.to)??[];existing.push(edge),edgesByTarget.set(edge.to,existing)}for(let[target,edges]of edgesByTarget){if(edges.length<2||!canBundle(edges,graph)||edges.some(e=>bundledEdges.has(e)))continue;let bundle={type:"fan-in",edges:[...edges],sharedNode:target,otherNodes:edges.map(e=>e.from),junctionPoint:null,sharedPath:[],junctionDir:Middle,sharedNodeDir:Middle};for(let edge of edges)edge.bundle=bundle,bundledEdges.add(edge);bundles.push(bundle)}let edgesBySource=new Map;for(let edge of graph.edges){if(edge.from===edge.to||bundledEdges.has(edge))continue;let existing=edgesBySource.get(edge.from)??[];existing.push(edge),edgesBySource.set(edge.from,existing)}for(let[source,edges]of edgesBySource){if(edges.length<2||!canBundle(edges,graph))continue;let bundle={type:"fan-out",edges:[...edges],sharedNode:source,otherNodes:edges.map(e=>e.to),junctionPoint:null,sharedPath:[],junctionDir:Middle,sharedNodeDir:Middle};for(let edge of edges)edge.bundle=bundle,bundledEdges.add(edge);bundles.push(bundle)}return bundles}function canBundle(edges,graph){if(edges.length<2)return!1;let firstStyle=edges[0].style,firstFromSg=getNodeSubgraph(graph,edges[0].from),firstToSg=getNodeSubgraph(graph,edges[0].to);for(let edge of edges){if(edge.style!==firstStyle||edge.text.length>0)return!1;let fromSg=getNodeSubgraph(graph,edge.from),toSg=getNodeSubgraph(graph,edge.to);if(fromSg!==firstFromSg||toSg!==firstToSg||fromSg!==toSg)return!1}return!0}function calculateJunctionPoint(graph,bundle){let dir=graph.config.graphDirection,sharedCoord=bundle.sharedNode.gridCoord,otherCoords=bundle.otherNodes.map(n=>n.gridCoord);if(bundle.type==="fan-in"){let minX=Math.min(...otherCoords.map(c=>c.x)),maxX=Math.max(...otherCoords.map(c=>c.x)),minY=Math.min(...otherCoords.map(c=>c.y)),maxY=Math.max(...otherCoords.map(c=>c.y));if(dir==="TD"){let junctionY=sharedCoord.y-1,centerX=Math.floor((minX+maxX)/2)+1;return{x:sharedCoord.x+1,y:junctionY}}else{let junctionX=sharedCoord.x-1,junctionY=sharedCoord.y+1;return{x:junctionX,y:junctionY}}}else{let minX=Math.min(...otherCoords.map(c=>c.x)),maxX=Math.max(...otherCoords.map(c=>c.x)),minY=Math.min(...otherCoords.map(c=>c.y)),maxY=Math.max(...otherCoords.map(c=>c.y));if(dir==="TD"){let junctionY=sharedCoord.y+3;return{x:sharedCoord.x+1,y:junctionY}}else{let junctionX=sharedCoord.x+3,junctionY=sharedCoord.y+1;return{x:junctionX,y:junctionY}}}}function routeBundledEdges(graph,bundle){let dir=graph.config.graphDirection;bundle.junctionPoint=calculateJunctionPoint(graph,bundle);let junction=bundle.junctionPoint;if(bundle.type==="fan-in"){bundle.junctionDir=dir==="TD"?Up:Left,bundle.sharedNodeDir=dir==="TD"?Down:Right;let targetCoord=bundle.sharedNode.gridCoord,targetEntry=dir==="TD"?{x:targetCoord.x+1,y:targetCoord.y}:{x:targetCoord.x,y:targetCoord.y+1},sharedPath=getPath(graph.grid,junction,targetEntry);bundle.sharedPath=sharedPath?mergePath(sharedPath):[junction,targetEntry];for(let edge of bundle.edges){let sourceCoord=edge.from.gridCoord,sourceExit=dir==="TD"?{x:sourceCoord.x+1,y:sourceCoord.y+2}:{x:sourceCoord.x+2,y:sourceCoord.y+1},pathToJunction=getPath(graph.grid,sourceExit,junction);edge.pathToJunction=pathToJunction?mergePath(pathToJunction):[sourceExit,junction],edge.startDir=dir==="TD"?Down:Right,edge.endDir=dir==="TD"?Up:Left,edge.path=[...edge.pathToJunction,...bundle.sharedPath.slice(1)]}}else{bundle.junctionDir=dir==="TD"?Down:Right,bundle.sharedNodeDir=dir==="TD"?Up:Left;let sourceCoord=bundle.sharedNode.gridCoord,sourceExit=dir==="TD"?{x:sourceCoord.x+1,y:sourceCoord.y+2}:{x:sourceCoord.x+2,y:sourceCoord.y+1},sharedPath=getPath(graph.grid,sourceExit,junction);bundle.sharedPath=sharedPath?mergePath(sharedPath):[sourceExit,junction];for(let edge of bundle.edges){let targetCoord=edge.to.gridCoord,targetEntry=dir==="TD"?{x:targetCoord.x+1,y:targetCoord.y}:{x:targetCoord.x,y:targetCoord.y+1},pathToJunction=getPath(graph.grid,junction,targetEntry);edge.pathToJunction=pathToJunction?mergePath(pathToJunction):[junction,targetEntry],edge.startDir=dir==="TD"?Down:Right,edge.endDir=dir==="TD"?Up:Left,edge.path=[...bundle.sharedPath,...edge.pathToJunction.slice(1)]}}}function processBundles(graph){for(let bundle of graph.bundles)routeBundledEdges(graph,bundle)}function splitLines(label){return label.split(`
6`)}function maxLineWidth(label){let lines=splitLines(label);return Math.max(...lines.map(l=>l.length),0)}function lineCount(label){return splitLines(label).length}var SHAPE_CORNERS={rectangle:{unicode:{tl:"\u250C",tr:"\u2510",bl:"\u2514",br:"\u2518"},ascii:{tl:"+",tr:"+",bl:"+",br:"+"}},rounded:{unicode:{tl:"\u256D",tr:"\u256E",bl:"\u2570",br:"\u256F"},ascii:{tl:".",tr:".",bl:"'",br:"'"}},circle:{unicode:{tl:"\u25EF",tr:"\u25EF",bl:"\u25EF",br:"\u25EF"},ascii:{tl:"o",tr:"o",bl:"o",br:"o"}},doublecircle:{unicode:{tl:"\u25CE",tr:"\u25CE",bl:"\u25CE",br:"\u25CE"},ascii:{tl:"@",tr:"@",bl:"@",br:"@"}},diamond:{unicode:{tl:"\u25C7",tr:"\u25C7",bl:"\u25C7",br:"\u25C7"},ascii:{tl:"<",tr:">",bl:"<",br:">"}},hexagon:{unicode:{tl:"\u231C",tr:"\u231D",bl:"\u231E",br:"\u231F"},ascii:{tl:"*",tr:"*",bl:"*",br:"*"}},stadium:{unicode:{tl:"(",tr:")",bl:"(",br:")"},ascii:{tl:"(",tr:")",bl:"(",br:")"}},subroutine:{unicode:{tl:"\u255F",tr:"\u2562",bl:"\u255F",br:"\u2562"},ascii:{tl:"|",tr:"|",bl:"|",br:"|"}},cylinder:{unicode:{tl:"\u256D",tr:"\u256E",bl:"\u2570",br:"\u256F"},ascii:{tl:".",tr:".",bl:"'",br:"'"}},asymmetric:{unicode:{tl:"\u25B7",tr:"\u2510",bl:"\u25B7",br:"\u2518"},ascii:{tl:">",tr:"+",bl:">",br:"+"}},trapezoid:{unicode:{tl:"/",tr:"\\",bl:"\u2514",br:"\u2518"},ascii:{tl:"/",tr:"\\",bl:"+",br:"+"}},"trapezoid-alt":{unicode:{tl:"\u250C",tr:"\u2510",bl:"\\",br:"/"},ascii:{tl:"+",tr:"+",bl:"\\",br:"/"}},"state-start":{unicode:{tl:"\u25CF",tr:"\u25CF",bl:"\u25CF",br:"\u25CF"},ascii:{tl:"*",tr:"*",bl:"*",br:"*"}},"state-end":{unicode:{tl:"\u25C9",tr:"\u25C9",bl:"\u25C9",br:"\u25C9"},ascii:{tl:"@",tr:"@",bl:"@",br:"@"}}};function getCorners(shape,useAscii){let corners=SHAPE_CORNERS[shape]??SHAPE_CORNERS.rectangle;return useAscii?corners.ascii:corners.unicode}function getBoxDimensions(label,options){let lines=splitLines(label),maxLineWidth2=Math.max(...lines.map(l=>l.length),0),lineCount2=lines.length,innerWidth=2*options.padding+maxLineWidth2,width=innerWidth+2,rawInnerHeight=lineCount2+2*options.padding,innerHeight=rawInnerHeight%2===0?rawInnerHeight+1:rawInnerHeight,height=innerHeight+2;return{width,height,labelArea:{x:1+options.padding,y:1+options.padding,width:maxLineWidth2,height:lineCount2},gridColumns:[1,innerWidth,1],gridRows:[1,innerHeight,1]}}function renderBox(label,dimensions,corners,useAscii){let{width,height}=dimensions,canvas=mkCanvas(width-1,height-1),from={x:0,y:0},to={x:width-1,y:height-1},hLine=useAscii?"-":"\u2500",vLine=useAscii?"|":"\u2502";for(let x=from.x+1;x<to.x;x++)canvas[x][from.y]=hLine,canvas[x][to.y]=hLine;for(let y=from.y+1;y<to.y;y++)canvas[from.x][y]=vLine,canvas[to.x][y]=vLine;canvas[from.x][from.y]=corners.tl,canvas[to.x][from.y]=corners.tr,canvas[from.x][to.y]=corners.bl,canvas[to.x][to.y]=corners.br;let lines=splitLines(label),w=width-1,h=height-1,startY=Math.floor(h/2)-Math.floor((lines.length-1)/2);for(let i=0;i<lines.length;i++){let line=lines[i],textX=Math.floor(w/2)-Math.ceil(line.length/2)+1;for(let j=0;j<line.length;j++){let x=textX+j,y=startY+i;x>=0&&x<canvas.length&&y>=0&&y<canvas[0].length&&(canvas[x][y]=line[j])}}return canvas}function getBoxAttachmentPoint(dir,dimensions,baseCoord){let{width,height}=dimensions,centerX=baseCoord.x+Math.floor(width/2),centerY=baseCoord.y+Math.floor(height/2);return dirEquals(dir,Up)?{x:centerX,y:baseCoord.y}:dirEquals(dir,Down)?{x:centerX,y:baseCoord.y+height-1}:dirEquals(dir,Left)?{x:baseCoord.x,y:centerY}:dirEquals(dir,Right)?{x:baseCoord.x+width-1,y:centerY}:dirEquals(dir,UpperLeft)?{x:baseCoord.x,y:baseCoord.y}:dirEquals(dir,UpperRight)?{x:baseCoord.x+width-1,y:baseCoord.y}:dirEquals(dir,LowerLeft)?{x:baseCoord.x,y:baseCoord.y+height-1}:dirEquals(dir,LowerRight)?{x:baseCoord.x+width-1,y:baseCoord.y+height-1}:{x:centerX,y:centerY}}var rectangleRenderer={getDimensions:getBoxDimensions,render(label,dimensions,options){let corners=getCorners("rectangle",options.useAscii);return renderBox(label,dimensions,corners,options.useAscii)},getAttachmentPoint:getBoxAttachmentPoint};var diamondRenderer={getDimensions:getBoxDimensions,render(label,dimensions,options){let corners=getCorners("diamond",options.useAscii);return renderBox(label,dimensions,corners,options.useAscii)},getAttachmentPoint:getBoxAttachmentPoint};var circleRenderer={getDimensions:getBoxDimensions,render(label,dimensions,options){let corners=getCorners("circle",options.useAscii);return renderBox(label,dimensions,corners,options.useAscii)},getAttachmentPoint:getBoxAttachmentPoint};var stateStartRenderer={getDimensions(_label,_options){return{width:5,height:3,labelArea:{x:2,y:1,width:1,height:1},gridColumns:[1,3,1],gridRows:[1,1,1]}},render(_label,dimensions,options){let{width,height}=dimensions,canvas=mkCanvas(width-1,height-1),centerX=Math.floor(width/2);return options.useAscii?(canvas[0][0]=".",canvas[1][0]="-",canvas[2][0]="-",canvas[3][0]="-",canvas[4][0]=".",canvas[0][1]="|",canvas[centerX][1]="*",canvas[4][1]="|",canvas[0][2]="'",canvas[1][2]="-",canvas[2][2]="-",canvas[3][2]="-",canvas[4][2]="'"):(canvas[0][0]="\u256D",canvas[1][0]="\u2500",canvas[2][0]="\u2500",canvas[3][0]="\u2500",canvas[4][0]="\u256E",canvas[0][1]="\u2502",canvas[centerX][1]="\u25CF",canvas[4][1]="\u2502",canvas[0][2]="\u2570",canvas[1][2]="\u2500",canvas[2][2]="\u2500",canvas[3][2]="\u2500",canvas[4][2]="\u256F"),canvas},getAttachmentPoint(dir,dimensions,baseCoord){let{width,height}=dimensions,centerX=baseCoord.x+Math.floor(width/2),centerY=baseCoord.y+Math.floor(height/2);return dirEquals(dir,Up)?{x:centerX,y:baseCoord.y}:dirEquals(dir,Down)?{x:centerX,y:baseCoord.y+height-1}:dirEquals(dir,Left)?{x:baseCoord.x,y:centerY}:dirEquals(dir,Right)?{x:baseCoord.x+width-1,y:centerY}:{x:centerX,y:centerY}}},stateEndRenderer={getDimensions(_label,_options){return{width:5,height:3,labelArea:{x:2,y:1,width:1,height:1},gridColumns:[1,3,1],gridRows:[1,1,1]}},render(_label,dimensions,options){let{width,height}=dimensions,canvas=mkCanvas(width-1,height-1),centerX=Math.floor(width/2);return options.useAscii?(canvas[0][0]="#",canvas[1][0]="=",canvas[2][0]="=",canvas[3][0]="=",canvas[4][0]="#",canvas[0][1]="#",canvas[centerX][1]="*",canvas[4][1]="#",canvas[0][2]="#",canvas[1][2]="=",canvas[2][2]="=",canvas[3][2]="=",canvas[4][2]="#"):(canvas[0][0]="\u2554",canvas[1][0]="\u2550",canvas[2][0]="\u2550",canvas[3][0]="\u2550",canvas[4][0]="\u2557",canvas[0][1]="\u2551",canvas[centerX][1]="\u25CE",canvas[4][1]="\u2551",canvas[0][2]="\u255A",canvas[1][2]="\u2550",canvas[2][2]="\u2550",canvas[3][2]="\u2550",canvas[4][2]="\u255D"),canvas},getAttachmentPoint(dir,dimensions,baseCoord){let{width,height}=dimensions,centerX=baseCoord.x+Math.floor(width/2),centerY=baseCoord.y+Math.floor(height/2);return dirEquals(dir,Up)?{x:centerX,y:baseCoord.y}:dirEquals(dir,Down)?{x:centerX,y:baseCoord.y+height-1}:dirEquals(dir,Left)?{x:baseCoord.x,y:centerY}:dirEquals(dir,Right)?{x:baseCoord.x+width-1,y:centerY}:{x:centerX,y:centerY}}};var roundedRenderer={getDimensions:getBoxDimensions,render(label,dimensions,options){let corners=getCorners("rounded",options.useAscii);return renderBox(label,dimensions,corners,options.useAscii)},getAttachmentPoint:getBoxAttachmentPoint};var stadiumRenderer={getDimensions(label,options){let lines=splitLines(label),maxLineWidth2=Math.max(...lines.map(l=>l.length),0),lineCount2=lines.length,innerWidth=2*options.padding+maxLineWidth2,width=innerWidth+4,innerHeight=lineCount2+2*options.padding,height=Math.max(innerHeight+2,3);return{width,height,labelArea:{x:2+options.padding,y:1+options.padding,width:maxLineWidth2,height:lineCount2},gridColumns:[2,innerWidth,2],gridRows:[1,innerHeight,1]}},render(label,dimensions,options){let{width,height}=dimensions,canvas=mkCanvas(width-1,height-1),centerY=Math.floor(height/2),hChar=options.useAscii?"-":"\u2500";if(height===3)canvas[0][centerY]="(",canvas[width-1][centerY]=")";else if(options.useAscii){for(let y=0;y<height;y++)canvas[0][y]="(",canvas[width-1][y]=")";for(let x=1;x<width-1;x++)canvas[x][0]=hChar,canvas[x][height-1]=hChar}else{canvas[0][0]="\u256D";for(let x=1;x<width-1;x++)canvas[x][0]=hChar;canvas[width-1][0]="\u256E";for(let y=1;y<height-1;y++)canvas[0][y]="\u2502",canvas[width-1][y]="\u2502";canvas[0][height-1]="\u2570";for(let x=1;x<width-1;x++)canvas[x][height-1]=hChar;canvas[width-1][height-1]="\u256F"}let lines=splitLines(label),startY=centerY-Math.floor((lines.length-1)/2);for(let i=0;i<lines.length;i++){let line=lines[i],textX=Math.floor(width/2)-Math.floor(line.length/2);for(let j=0;j<line.length;j++){let x=textX+j,y=startY+i;x>0&&x<width-1&&y>=0&&y<height&&(canvas[x][y]=line[j])}}return canvas},getAttachmentPoint:getBoxAttachmentPoint};var hexagonRenderer={getDimensions:getBoxDimensions,render(label,dimensions,options){let corners=getCorners("hexagon",options.useAscii);return renderBox(label,dimensions,corners,options.useAscii)},getAttachmentPoint:getBoxAttachmentPoint};var subroutineRenderer={getDimensions(label,options){let lines=splitLines(label),maxLineWidth2=Math.max(...lines.map(l=>l.length),0),lineCount2=lines.length,innerWidth=2*options.padding+maxLineWidth2,width=innerWidth+4,innerHeight=lineCount2+2*options.padding,height=innerHeight+2;return{width,height,labelArea:{x:2+options.padding,y:1+options.padding,width:maxLineWidth2,height:lineCount2},gridColumns:[2,innerWidth,2],gridRows:[1,innerHeight,1]}},render(label,dimensions,options){let{width,height}=dimensions,canvas=mkCanvas(width-1,height-1),hChar=options.useAscii?"-":"\u2500",vChar=options.useAscii?"|":"\u2502";canvas[0][0]=options.useAscii?"+":"\u250C",canvas[1][0]=options.useAscii?"+":"\u252C";for(let x=2;x<width-2;x++)canvas[x][0]=hChar;canvas[width-2][0]=options.useAscii?"+":"\u252C",canvas[width-1][0]=options.useAscii?"+":"\u2510";for(let y=1;y<height-1;y++)canvas[0][y]=vChar,canvas[1][y]=vChar,canvas[width-2][y]=vChar,canvas[width-1][y]=vChar;canvas[0][height-1]=options.useAscii?"+":"\u2514",canvas[1][height-1]=options.useAscii?"+":"\u2534";for(let x=2;x<width-2;x++)canvas[x][height-1]=hChar;canvas[width-2][height-1]=options.useAscii?"+":"\u2534",canvas[width-1][height-1]=options.useAscii?"+":"\u2518";let lines=splitLines(label),startY=Math.floor(height/2)-Math.floor((lines.length-1)/2);for(let i=0;i<lines.length;i++){let line=lines[i],textX=Math.floor(width/2)-Math.floor(line.length/2);for(let j=0;j<line.length;j++){let x=textX+j,y=startY+i;x>1&&x<width-2&&y>0&&y<height-1&&(canvas[x][y]=line[j])}}return canvas},getAttachmentPoint:getBoxAttachmentPoint},doublecircleRenderer={getDimensions:getBoxDimensions,render(label,dimensions,options){let corners=getCorners("doublecircle",options.useAscii);return renderBox(label,dimensions,corners,options.useAscii)},getAttachmentPoint:getBoxAttachmentPoint},cylinderRenderer={getDimensions(label,options){let lines=splitLines(label),maxLineWidth2=Math.max(...lines.map(l=>l.length),0),lineCount2=lines.length,innerWidth=2*options.padding+maxLineWidth2,width=innerWidth+2,innerHeight=lineCount2+2*options.padding+2,height=innerHeight+2;return{width,height,labelArea:{x:1+options.padding,y:2+options.padding,width:maxLineWidth2,height:lineCount2},gridColumns:[1,innerWidth,1],gridRows:[2,innerHeight-2,2]}},render(label,dimensions,options){let{width,height}=dimensions,canvas=mkCanvas(width-1,height-1),hChar=options.useAscii?"-":"\u2500",vChar=options.useAscii?"|":"\u2502";canvas[0][0]=options.useAscii?".":"\u256D";for(let x=1;x<width-1;x++)canvas[x][0]=hChar;canvas[width-1][0]=options.useAscii?".":"\u256E",canvas[0][1]=vChar;for(let x=1;x<width-1;x++)canvas[x][1]=hChar;canvas[width-1][1]=vChar;for(let y=2;y<height-2;y++)canvas[0][y]=vChar,canvas[width-1][y]=vChar;canvas[0][height-2]=vChar;for(let x=1;x<width-1;x++)canvas[x][height-2]=hChar;canvas[width-1][height-2]=vChar,canvas[0][height-1]=options.useAscii?"'":"\u2570";for(let x=1;x<width-1;x++)canvas[x][height-1]=hChar;canvas[width-1][height-1]=options.useAscii?"'":"\u256F";let lines=splitLines(label),startY=Math.floor(height/2)-Math.floor((lines.length-1)/2);for(let i=0;i<lines.length;i++){let line=lines[i],textX=Math.floor(width/2)-Math.floor(line.length/2);for(let j=0;j<line.length;j++){let x=textX+j,y=startY+i;x>0&&x<width-1&&y>1&&y<height-2&&(canvas[x][y]=line[j])}}return canvas},getAttachmentPoint:getBoxAttachmentPoint},asymmetricRenderer={getDimensions:getBoxDimensions,render(label,dimensions,options){let corners=getCorners("asymmetric",options.useAscii);return renderBox(label,dimensions,corners,options.useAscii)},getAttachmentPoint:getBoxAttachmentPoint},trapezoidRenderer={getDimensions:getBoxDimensions,render(label,dimensions,options){let corners=getCorners("trapezoid",options.useAscii);return renderBox(label,dimensions,corners,options.useAscii)},getAttachmentPoint:getBoxAttachmentPoint},trapezoidAltRenderer={getDimensions:getBoxDimensions,render(label,dimensions,options){let corners=getCorners("trapezoid-alt",options.useAscii);return renderBox(label,dimensions,corners,options.useAscii)},getAttachmentPoint:getBoxAttachmentPoint};var shapeRegistry=new Map([["rectangle",rectangleRenderer],["rounded",roundedRenderer],["diamond",diamondRenderer],["stadium",stadiumRenderer],["circle",circleRenderer],["subroutine",subroutineRenderer],["doublecircle",doublecircleRenderer],["hexagon",hexagonRenderer],["cylinder",cylinderRenderer],["asymmetric",asymmetricRenderer],["trapezoid",trapezoidRenderer],["trapezoid-alt",trapezoidAltRenderer],["state-start",stateStartRenderer],["state-end",stateEndRenderer]]);function getShapeRenderer(shape){return shapeRegistry.get(shape)??rectangleRenderer}function getShapeDimensions(shape,label,options){return getShapeRenderer(shape).getDimensions(label,options)}function getShapeAttachmentPoint(shape,dir,dimensions,baseCoord){return getShapeRenderer(shape).getAttachmentPoint(dir,dimensions,baseCoord)}function drawNode(node,graph){return drawBoxWithGridDimensions(node,graph)}function drawBoxWithGridDimensions(node,graph){let gc=node.gridCoord,useAscii=graph.config.useAscii,w=0;for(let i=0;i<2;i++)w+=graph.columnWidth.get(gc.x+i)??0;let h=0;for(let i=0;i<2;i++)h+=graph.rowHeight.get(gc.y+i)??0;let from={x:0,y:0},to={x:w,y:h},box=mkCanvas(Math.max(from.x,to.x),Math.max(from.y,to.y)),corners=getCorners(node.shape,useAscii),isDoubleBox=node.shape==="state-end",hChar=useAscii?isDoubleBox?"=":"-":isDoubleBox?"\u2550":"\u2500",vChar=useAscii?isDoubleBox?"\u2016":"|":isDoubleBox?"\u2551":"\u2502",effectiveCorners=isDoubleBox?useAscii?{tl:"#",tr:"#",bl:"#",br:"#"}:{tl:"\u2554",tr:"\u2557",bl:"\u255A",br:"\u255D"}:corners;for(let x=from.x+1;x<to.x;x++)box[x][from.y]=hChar;for(let x=from.x+1;x<to.x;x++)box[x][to.y]=hChar;for(let y=from.y+1;y<to.y;y++)box[from.x][y]=vChar;for(let y=from.y+1;y<to.y;y++)box[to.x][y]=vChar;box[from.x][from.y]=effectiveCorners.tl,box[to.x][from.y]=effectiveCorners.tr,box[from.x][to.y]=effectiveCorners.bl,box[to.x][to.y]=effectiveCorners.br;let label=node.displayLabel,lines=splitLines(label),startY=from.y+Math.floor(h/2)-Math.floor((lines.length-1)/2);for(let i=0;i<lines.length;i++){let line=lines[i],textX=from.x+Math.floor(w/2)-Math.ceil(line.length/2)+1;for(let j=0;j<line.length;j++)textX+j>=0&&textX+j<box.length&&startY+i>=0&&startY+i<box[0].length&&(box[textX+j][startY+i]=line[j])}return box}function drawBox(node,graph){return drawNode(node,graph)}function drawMultiBox(sections,useAscii,padding=1){let maxTextWidth=0;for(let section of sections)for(let line of section)maxTextWidth=Math.max(maxTextWidth,line.length);let boxWidth=maxTextWidth+2*padding+2,totalLines=0;for(let section of sections)totalLines+=Math.max(section.length,1);let numDividers=sections.length-1,boxHeight=totalLines+numDividers+2,hLine=useAscii?"-":"\u2500",vLine=useAscii?"|":"\u2502",tl=useAscii?"+":"\u250C",tr=useAscii?"+":"\u2510",bl=useAscii?"+":"\u2514",br=useAscii?"+":"\u2518",divL=useAscii?"+":"\u251C",divR=useAscii?"+":"\u2524",canvas=mkCanvas(boxWidth-1,boxHeight-1);canvas[0][0]=tl;for(let x=1;x<boxWidth-1;x++)canvas[x][0]=hLine;canvas[boxWidth-1][0]=tr,canvas[0][boxHeight-1]=bl;for(let x=1;x<boxWidth-1;x++)canvas[x][boxHeight-1]=hLine;canvas[boxWidth-1][boxHeight-1]=br;for(let y=1;y<boxHeight-1;y++)canvas[0][y]=vLine,canvas[boxWidth-1][y]=vLine;let row=1;for(let s=0;s<sections.length;s++){let section=sections[s],lines=section.length>0?section:[""];for(let line of lines){let startX=1+padding;for(let i=0;i<line.length;i++)canvas[startX+i][row]=line[i];row++}if(s<sections.length-1){canvas[0][row]=divL;for(let x=1;x<boxWidth-1;x++)canvas[x][row]=hLine;canvas[boxWidth-1][row]=divR,row++}}return canvas}var LINE_CHARS={solid:{h:{unicode:"\u2500",ascii:"-"},v:{unicode:"\u2502",ascii:"|"}},dotted:{h:{unicode:"\u2504",ascii:"."},v:{unicode:"\u2506",ascii:":"}},thick:{h:{unicode:"\u2501",ascii:"="},v:{unicode:"\u2503",ascii:"\u2016"}}};function drawLine(canvas,from,to,offsetFrom,offsetTo,useAscii,style="solid"){let dir=determineDirection(from,to),drawnCoords=[],chars=LINE_CHARS[style],hChar=useAscii?chars.h.ascii:chars.h.unicode,vChar=useAscii?chars.v.ascii:chars.v.unicode;if(dirEquals(dir,Up))for(let y=from.y-offsetFrom;y>=to.y-offsetTo;y--)drawnCoords.push({x:from.x,y}),canvas[from.x][y]=vChar;else if(dirEquals(dir,Down))for(let y=from.y+offsetFrom;y<=to.y+offsetTo;y++)drawnCoords.push({x:from.x,y}),canvas[from.x][y]=vChar;else if(dirEquals(dir,Left))for(let x=from.x-offsetFrom;x>=to.x-offsetTo;x--)drawnCoords.push({x,y:from.y}),canvas[x][from.y]=hChar;else if(dirEquals(dir,Right))for(let x=from.x+offsetFrom;x<=to.x+offsetTo;x++)drawnCoords.push({x,y:from.y}),canvas[x][from.y]=hChar;else if(dirEquals(dir,UpperLeft)){for(let x=from.x-offsetFrom;x>=to.x;x--)drawnCoords.push({x,y:from.y}),canvas[x][from.y]=hChar;for(let y=from.y-1;y>=to.y-offsetTo;y--)drawnCoords.push({x:to.x,y}),canvas[to.x][y]=vChar}else if(dirEquals(dir,UpperRight)){for(let x=from.x+offsetFrom;x<=to.x;x++)drawnCoords.push({x,y:from.y}),canvas[x][from.y]=hChar;for(let y=from.y-1;y>=to.y-offsetTo;y--)drawnCoords.push({x:to.x,y}),canvas[to.x][y]=vChar}else if(dirEquals(dir,LowerLeft)){for(let x=from.x-offsetFrom;x>=to.x;x--)drawnCoords.push({x,y:from.y}),canvas[x][from.y]=hChar;for(let y=from.y+1;y<=to.y+offsetTo;y++)drawnCoords.push({x:to.x,y}),canvas[to.x][y]=vChar}else if(dirEquals(dir,LowerRight))if(to.x-from.x<=1)for(let y=from.y+offsetFrom;y<=to.y+offsetTo;y++)drawnCoords.push({x:from.x,y}),canvas[from.x][y]=vChar;else{for(let x=from.x+offsetFrom;x<=to.x;x++)drawnCoords.push({x,y:from.y}),canvas[x][from.y]=hChar;for(let y=from.y+1;y<=to.y+offsetTo;y++)drawnCoords.push({x:to.x,y}),canvas[to.x][y]=vChar}return drawnCoords}function drawArrow(graph,edge){if(edge.path.length===0){let empty=copyCanvas(graph.canvas);return[empty,empty,empty,empty,empty,empty]}let labelCanvas=drawArrowLabel(graph,edge),[pathCanvas,linesDrawn,lineDirs]=drawPath(graph,edge.path,edge.style),boxStartCanvas=drawBoxStart(graph,edge.path,linesDrawn[0],edge.from.shape),arrowHeadEndCanvas;edge.hasArrowEnd?arrowHeadEndCanvas=drawArrowHead(graph,linesDrawn[linesDrawn.length-1],lineDirs[lineDirs.length-1]):arrowHeadEndCanvas=copyCanvas(graph.canvas);let arrowHeadStartCanvas;if(edge.hasArrowStart&&linesDrawn.length>0){let firstPoint=linesDrawn[0][0],startDir=reverseDirection(lineDirs[0]),arrowPos={x:firstPoint.x,y:firstPoint.y};dirEquals(lineDirs[0],Right)?arrowPos.x=firstPoint.x-1:dirEquals(lineDirs[0],Left)?arrowPos.x=firstPoint.x+1:dirEquals(lineDirs[0],Down)?arrowPos.y=firstPoint.y-1:dirEquals(lineDirs[0],Up)&&(arrowPos.y=firstPoint.y+1),arrowHeadStartCanvas=drawArrowHead(graph,[firstPoint,arrowPos],startDir)}else arrowHeadStartCanvas=copyCanvas(graph.canvas);let cornersCanvas=drawCorners(graph,edge.path);return[pathCanvas,boxStartCanvas,arrowHeadEndCanvas,arrowHeadStartCanvas,cornersCanvas,labelCanvas]}function reverseDirection(dir){return dirEquals(dir,Up)?Down:dirEquals(dir,Down)?Up:dirEquals(dir,Left)?Right:dirEquals(dir,Right)?Left:dirEquals(dir,UpperLeft)?LowerRight:dirEquals(dir,UpperRight)?LowerLeft:dirEquals(dir,LowerLeft)?UpperRight:dirEquals(dir,LowerRight)?UpperLeft:Middle}function drawPath(graph,path,style="solid"){let canvas=copyCanvas(graph.canvas),previousCoord=path[0],linesDrawn=[],lineDirs=[];for(let i=1;i<path.length;i++){let nextCoord=path[i],prevDC=gridToDrawingCoord(graph,previousCoord),nextDC=gridToDrawingCoord(graph,nextCoord);if(drawingCoordEquals(prevDC,nextDC)){previousCoord=nextCoord;continue}let dir=determineDirection(previousCoord,nextCoord),segment=drawLine(canvas,prevDC,nextDC,1,-1,graph.config.useAscii,style);segment.length===0&&segment.push(prevDC),linesDrawn.push(segment),lineDirs.push(dir),previousCoord=nextCoord}return[canvas,linesDrawn,lineDirs]}function drawBoxStart(graph,path,firstLine,sourceShape){let canvas=copyCanvas(graph.canvas);if(graph.config.useAscii||sourceShape==="state-start"||sourceShape==="state-end")return canvas;let from=firstLine[0],dir=determineDirection(path[0],path[1]);return dirEquals(dir,Up)?canvas[from.x][from.y+1]="\u2534":dirEquals(dir,Down)?canvas[from.x][from.y-1]="\u252C":dirEquals(dir,Left)?canvas[from.x+1][from.y]="\u2524":dirEquals(dir,Right)&&(canvas[from.x-1][from.y]="\u251C"),canvas}function drawArrowHead(graph,lastLine,fallbackDir){let canvas=copyCanvas(graph.canvas);if(lastLine.length===0)return canvas;let from=lastLine[0],lastPos=lastLine[lastLine.length-1],dir=determineDirection(from,lastPos);(lastLine.length===1||dirEquals(dir,Middle))&&(dir=fallbackDir);let char;return graph.config.useAscii?dirEquals(dir,Up)?char="^":dirEquals(dir,Down)?char="v":dirEquals(dir,Left)?char="<":dirEquals(dir,Right)?char=">":dirEquals(fallbackDir,Up)?char="^":dirEquals(fallbackDir,Down)?char="v":dirEquals(fallbackDir,Left)?char="<":dirEquals(fallbackDir,Right)?char=">":char="*":dirEquals(dir,Up)?char="\u25B2":dirEquals(dir,Down)?char="\u25BC":dirEquals(dir,Left)?char="\u25C4":dirEquals(dir,Right)?char="\u25BA":dirEquals(dir,UpperRight)?char="\u25E5":dirEquals(dir,UpperLeft)?char="\u25E4":dirEquals(dir,LowerRight)?char="\u25E2":dirEquals(dir,LowerLeft)?char="\u25E3":dirEquals(fallbackDir,Up)?char="\u25B2":dirEquals(fallbackDir,Down)?char="\u25BC":dirEquals(fallbackDir,Left)?char="\u25C4":dirEquals(fallbackDir,Right)?char="\u25BA":dirEquals(fallbackDir,UpperRight)?char="\u25E5":dirEquals(fallbackDir,UpperLeft)?char="\u25E4":dirEquals(fallbackDir,LowerRight)?char="\u25E2":dirEquals(fallbackDir,LowerLeft)?char="\u25E3":char="\u25CF",canvas[lastPos.x][lastPos.y]=char,canvas}function drawCorners(graph,path){let canvas=copyCanvas(graph.canvas);for(let idx=1;idx<path.length-1;idx++){let coord=path[idx],dc=gridToDrawingCoord(graph,coord),prevDir=determineDirection(path[idx-1],coord),nextDir=determineDirection(coord,path[idx+1]),corner;graph.config.useAscii?corner="+":dirEquals(prevDir,Right)&&dirEquals(nextDir,Down)||dirEquals(prevDir,Up)&&dirEquals(nextDir,Left)?corner="\u2510":dirEquals(prevDir,Right)&&dirEquals(nextDir,Up)||dirEquals(prevDir,Down)&&dirEquals(nextDir,Left)?corner="\u2518":dirEquals(prevDir,Left)&&dirEquals(nextDir,Down)||dirEquals(prevDir,Up)&&dirEquals(nextDir,Right)?corner="\u250C":dirEquals(prevDir,Left)&&dirEquals(nextDir,Up)||dirEquals(prevDir,Down)&&dirEquals(nextDir,Right)?corner="\u2514":corner="+",canvas[dc.x][dc.y]=corner}return canvas}function drawArrowLabel(graph,edge){let canvas=copyCanvas(graph.canvas);if(edge.text.length===0)return canvas;let drawingLine=lineToDrawing(graph,edge.labelLine),isUpwardEdge;if(edge.path.length>=2){let startY=edge.path[0].y,endY=edge.path[edge.path.length-1].y;endY<startY?isUpwardEdge=!0:endY>startY&&(isUpwardEdge=!1)}return drawTextOnLine(canvas,drawingLine,edge.text,isUpwardEdge),canvas}function drawTextOnLine(canvas,line,label,isUpwardEdge){if(line.length<2)return;let minX=Math.min(line[0].x,line[1].x),maxX=Math.max(line[0].x,line[1].x),minY=Math.min(line[0].y,line[1].y),maxY=Math.max(line[0].y,line[1].y),middleX=minX+Math.floor((maxX-minX)/2),middleY=minY+Math.floor((maxY-minY)/2);if(isUpwardEdge!==void 0&&minX===maxX){let segmentHeight=maxY-minY,offset=Math.max(1,Math.floor(segmentHeight/4));isUpwardEdge?middleY=middleY+offset:middleY=middleY-offset}let lines=splitLines(label),startY=middleY-Math.floor((lines.length-1)/2);for(let i=0;i<lines.length;i++){let lineText=lines[i],startX=middleX-Math.floor(lineText.length/2);drawText(canvas,{x:startX,y:startY+i},lineText)}}function getNodeAttachmentPoint(graph,node,dir){let gc=node.gridCoord,w=0;for(let i=0;i<2;i++)w+=graph.columnWidth.get(gc.x+i)??0;let h=0;for(let i=0;i<2;i++)h+=graph.rowHeight.get(gc.y+i)??0;let gridDimensions={width:w+1,height:h+1,labelArea:{x:0,y:0,width:0,height:0},gridColumns:[0,0,0],gridRows:[0,0,0]},baseCoord=node.drawingCoord;return getShapeAttachmentPoint(node.shape,dir,gridDimensions,baseCoord)}function drawBundledEdgeSegment(graph,edge,bundle){let empty=copyCanvas(graph.canvas);if(!edge.pathToJunction||edge.pathToJunction.length===0)return[empty,empty,empty,empty,empty,empty];let pathCanvas=copyCanvas(graph.canvas),useAscii=graph.config.useAscii,drawingPath=edge.pathToJunction.map((gc,idx)=>bundle.type==="fan-in"&&idx===0?getNodeAttachmentPoint(graph,edge.from,edge.startDir):bundle.type==="fan-out"&&idx===edge.pathToJunction.length-1?getNodeAttachmentPoint(graph,edge.to,edge.endDir):gridToDrawingCoord(graph,gc));for(let i=1;i<drawingPath.length;i++){let from=drawingPath[i-1],to=drawingPath[i];drawingCoordEquals(from,to)||drawLine(pathCanvas,from,to,1,-1,useAscii,edge.style)}let cornersCanvas=copyCanvas(graph.canvas);for(let idx=1;idx<edge.pathToJunction.length-1;idx++){let coord=edge.pathToJunction[idx],dc=gridToDrawingCoord(graph,coord),prevDir=determineDirection(edge.pathToJunction[idx-1],coord),nextDir=determineDirection(coord,edge.pathToJunction[idx+1]),corner;useAscii?corner="+":dirEquals(prevDir,Right)&&dirEquals(nextDir,Down)||dirEquals(prevDir,Up)&&dirEquals(nextDir,Left)?corner="\u2510":dirEquals(prevDir,Right)&&dirEquals(nextDir,Up)||dirEquals(prevDir,Down)&&dirEquals(nextDir,Left)?corner="\u2518":dirEquals(prevDir,Left)&&dirEquals(nextDir,Down)||dirEquals(prevDir,Up)&&dirEquals(nextDir,Right)?corner="\u250C":dirEquals(prevDir,Left)&&dirEquals(nextDir,Up)||dirEquals(prevDir,Down)&&dirEquals(nextDir,Right)?corner="\u2514":corner="+",cornersCanvas[dc.x][dc.y]=corner}let boxStartCanvas=copyCanvas(graph.canvas);if(bundle.type==="fan-in"&&edge.pathToJunction.length>=2){let firstPoint=drawingPath[0],dir=determineDirection(edge.pathToJunction[0],edge.pathToJunction[1]);useAscii||(dirEquals(dir,Up)?boxStartCanvas[firstPoint.x][firstPoint.y]="\u2534":dirEquals(dir,Down)?boxStartCanvas[firstPoint.x][firstPoint.y]="\u252C":dirEquals(dir,Left)?boxStartCanvas[firstPoint.x][firstPoint.y]="\u2524":dirEquals(dir,Right)&&(boxStartCanvas[firstPoint.x][firstPoint.y]="\u251C"))}let labelCanvas=copyCanvas(graph.canvas);return[pathCanvas,boxStartCanvas,empty,empty,cornersCanvas,labelCanvas]}function drawBundleSharedPath(graph,bundle){let pathCanvas=copyCanvas(graph.canvas),cornersCanvas=copyCanvas(graph.canvas);if(bundle.sharedPath.length<2)return[pathCanvas,cornersCanvas];let useAscii=graph.config.useAscii,style=bundle.edges[0]?.style??"solid",graphDir=graph.config.graphDirection,drawingPath=bundle.sharedPath.map((gc,idx)=>{if(bundle.type==="fan-in"&&idx===bundle.sharedPath.length-1){let entryDir=graphDir==="TD"?Up:Left;return getNodeAttachmentPoint(graph,bundle.sharedNode,entryDir)}if(bundle.type==="fan-out"&&idx===0){let exitDir=graphDir==="TD"?Down:Right;return getNodeAttachmentPoint(graph,bundle.sharedNode,exitDir)}return gridToDrawingCoord(graph,gc)});for(let i=1;i<drawingPath.length;i++){let from=drawingPath[i-1],to=drawingPath[i];drawingCoordEquals(from,to)||drawLine(pathCanvas,from,to,1,-1,useAscii,style)}for(let idx=1;idx<bundle.sharedPath.length-1;idx++){let coord=bundle.sharedPath[idx],dc=gridToDrawingCoord(graph,coord),prevDir=determineDirection(bundle.sharedPath[idx-1],coord),nextDir=determineDirection(coord,bundle.sharedPath[idx+1]),corner;useAscii?corner="+":dirEquals(prevDir,Right)&&dirEquals(nextDir,Down)||dirEquals(prevDir,Up)&&dirEquals(nextDir,Left)?corner="\u2510":dirEquals(prevDir,Right)&&dirEquals(nextDir,Up)||dirEquals(prevDir,Down)&&dirEquals(nextDir,Left)?corner="\u2518":dirEquals(prevDir,Left)&&dirEquals(nextDir,Down)||dirEquals(prevDir,Up)&&dirEquals(nextDir,Right)?corner="\u250C":dirEquals(prevDir,Left)&&dirEquals(nextDir,Up)||dirEquals(prevDir,Down)&&dirEquals(nextDir,Right)?corner="\u2514":corner="+",cornersCanvas[dc.x][dc.y]=corner}return[pathCanvas,cornersCanvas]}function drawBundleArrowhead(graph,bundle){let canvas=copyCanvas(graph.canvas);if(bundle.sharedPath.length<2)return canvas;let lastIdx=bundle.sharedPath.length-1,secondLast=bundle.sharedPath[lastIdx-1],last=bundle.sharedPath[lastIdx],dir=determineDirection(secondLast,last),graphDir=graph.config.graphDirection,entryDir=graphDir==="TD"?Up:Left,dc=getNodeAttachmentPoint(graph,bundle.sharedNode,entryDir);graphDir==="TD"?dc.y-=1:dc.x-=1;let char;return graph.config.useAscii?dirEquals(dir,Up)?char="^":dirEquals(dir,Down)?char="v":dirEquals(dir,Left)?char="<":dirEquals(dir,Right)?char=">":char="v":dirEquals(dir,Up)?char="\u25B2":dirEquals(dir,Down)?char="\u25BC":dirEquals(dir,Left)?char="\u25C4":dirEquals(dir,Right)?char="\u25BA":char="\u25BC",canvas[dc.x][dc.y]=char,canvas}function drawBundledEdgeArrowhead(graph,edge){let canvas=copyCanvas(graph.canvas);if(!edge.pathToJunction||edge.pathToJunction.length<2)return canvas;let lastIdx=edge.pathToJunction.length-1,secondLast=edge.pathToJunction[lastIdx-1],last=edge.pathToJunction[lastIdx],dir=determineDirection(secondLast,last),graphDir=graph.config.graphDirection,entryDir=graphDir==="TD"?Up:Left,dc=getNodeAttachmentPoint(graph,edge.to,entryDir);graphDir==="TD"?dc.y-=1:dc.x-=1;let char;return graph.config.useAscii?dirEquals(dir,Up)?char="^":dirEquals(dir,Down)?char="v":dirEquals(dir,Left)?char="<":dirEquals(dir,Right)?char=">":char="v":dirEquals(dir,Up)?char="\u25B2":dirEquals(dir,Down)?char="\u25BC":dirEquals(dir,Left)?char="\u25C4":dirEquals(dir,Right)?char="\u25BA":char="\u25BC",canvas[dc.x][dc.y]=char,canvas}function drawJunctionCharacter(graph,bundle){let canvas=copyCanvas(graph.canvas);if(!bundle.junctionPoint)return canvas;let dc=gridToDrawingCoord(graph,bundle.junctionPoint),useAscii=graph.config.useAscii,hasUp=!1,hasDown=!1,hasLeft=!1,hasRight=!1;if(bundle.sharedPath.length>=2){let junctionIdx=bundle.type==="fan-in"?0:bundle.sharedPath.length-1,adjacentIdx=bundle.type==="fan-in"?1:bundle.sharedPath.length-2,sharedDir=determineDirection(bundle.sharedPath[junctionIdx],bundle.sharedPath[adjacentIdx]);dirEquals(sharedDir,Down)?hasDown=!0:dirEquals(sharedDir,Up)?hasUp=!0:dirEquals(sharedDir,Right)?hasRight=!0:dirEquals(sharedDir,Left)&&(hasLeft=!0)}for(let edge of bundle.edges)if(edge.pathToJunction&&edge.pathToJunction.length>=2){let junctionIdx=bundle.type==="fan-in"?edge.pathToJunction.length-1:0,adjacentIdx=bundle.type==="fan-in"?edge.pathToJunction.length-2:1,arrivalDir=determineDirection(edge.pathToJunction[adjacentIdx],edge.pathToJunction[junctionIdx]);dirEquals(arrivalDir,Down)?hasUp=!0:dirEquals(arrivalDir,Up)?hasDown=!0:dirEquals(arrivalDir,Right)?hasLeft=!0:dirEquals(arrivalDir,Left)&&(hasRight=!0)}let char;return useAscii?char="+":hasUp&&hasDown&&hasLeft&&hasRight?char="\u253C":hasDown&&hasLeft&&hasRight&&!hasUp?char="\u252C":hasUp&&hasLeft&&hasRight&&!hasDown?char="\u2534":hasUp&&hasDown&&hasRight&&!hasLeft?char="\u251C":hasUp&&hasDown&&hasLeft&&!hasRight?char="\u2524":hasLeft&&hasRight?char="\u2500":hasUp&&hasDown?char="\u2502":hasDown&&hasRight?char="\u250C":hasDown&&hasLeft?char="\u2510":hasUp&&hasRight?char="\u2514":hasUp&&hasLeft?char="\u2518":char="\u253C",canvas[dc.x][dc.y]=char,canvas}function drawSubgraphBox(sg,graph){let width=sg.maxX-sg.minX,height=sg.maxY-sg.minY;if(width<=0||height<=0)return mkCanvas(0,0);let from={x:0,y:0},to={x:width,y:height},canvas=mkCanvas(width,height);if(graph.config.useAscii){for(let x=from.x+1;x<to.x;x++)canvas[x][from.y]="-";for(let x=from.x+1;x<to.x;x++)canvas[x][to.y]="-";for(let y=from.y+1;y<to.y;y++)canvas[from.x][y]="|";for(let y=from.y+1;y<to.y;y++)canvas[to.x][y]="|";canvas[from.x][from.y]="+",canvas[to.x][from.y]="+",canvas[from.x][to.y]="+",canvas[to.x][to.y]="+"}else{for(let x=from.x+1;x<to.x;x++)canvas[x][from.y]="\u2500";for(let x=from.x+1;x<to.x;x++)canvas[x][to.y]="\u2500";for(let y=from.y+1;y<to.y;y++)canvas[from.x][y]="\u2502";for(let y=from.y+1;y<to.y;y++)canvas[to.x][y]="\u2502";canvas[from.x][from.y]="\u250C",canvas[to.x][from.y]="\u2510",canvas[from.x][to.y]="\u2514",canvas[to.x][to.y]="\u2518"}return canvas}function drawSubgraphLabel(sg,graph){let width=sg.maxX-sg.minX,height=sg.maxY-sg.minY;if(width<=0||height<=0)return[mkCanvas(0,0),{x:0,y:0}];let canvas=mkCanvas(width,height),lines=splitLines(sg.name);for(let i=0;i<lines.length;i++){let line=lines[i],labelY=1+i,labelX=Math.floor(width/2)-Math.floor(line.length/2);labelX<1&&(labelX=1);for(let j=0;j<line.length;j++)labelX+j<width&&labelY<height&&(canvas[labelX+j][labelY]=line[j])}return[canvas,{x:sg.minX,y:sg.minY}]}function sortSubgraphsByDepth(subgraphs){function getDepth(sg){return sg.parent===null?0:1+getDepth(sg.parent)}let sorted=[...subgraphs];return sorted.sort((a,b)=>getDepth(a)-getDepth(b)),sorted}function fillRolesFromCanvas(roleCanvas,canvas,offset,role){for(let x=0;x<canvas.length;x++)for(let y=0;y<(canvas[0]?.length??0);y++){let char=canvas[x]?.[y];if(char&&char!==" "){let rx=x+offset.x,ry=y+offset.y;rx>=0&&ry>=0&&setRole(roleCanvas,rx,ry,role)}}}function fillRolesFromCanvases(roleCanvas,canvases,offset,role){for(let canvas of canvases)fillRolesFromCanvas(roleCanvas,canvas,offset,role)}function fillRolesForNodeBox(roleCanvas,canvas,offset){let isBorderChar=c=>/^[┌┐└┘├┤┬┴┼│─╭╮╰╯+\-|.':]$/.test(c);for(let x=0;x<canvas.length;x++)for(let y=0;y<(canvas[0]?.length??0);y++){let char=canvas[x]?.[y];if(char&&char!==" "){let rx=x+offset.x,ry=y+offset.y;rx>=0&&ry>=0&&setRole(roleCanvas,rx,ry,isBorderChar(char)?"border":"text")}}}function drawGraph(graph){let useAscii=graph.config.useAscii,zero={x:0,y:0},sortedSgs=sortSubgraphsByDepth(graph.subgraphs);for(let sg of sortedSgs){let sgCanvas=drawSubgraphBox(sg,graph),offset={x:sg.minX,y:sg.minY};graph.canvas=mergeCanvases(graph.canvas,offset,useAscii,sgCanvas),fillRolesFromCanvas(graph.roleCanvas,sgCanvas,offset,"border")}for(let node of graph.nodes)!node.drawn&&node.drawingCoord&&node.drawing&&(graph.canvas=mergeCanvases(graph.canvas,node.drawingCoord,useAscii,node.drawing),fillRolesForNodeBox(graph.roleCanvas,node.drawing,node.drawingCoord),node.drawn=!0);let lineCanvases=[],cornerCanvases=[],arrowHeadEndCanvases=[],arrowHeadStartCanvases=[],boxStartCanvases=[],labelCanvases=[],junctionCanvases=[],processedBundles=new Set;for(let edge of graph.edges)if(edge.bundle&&edge.pathToJunction){let bundle=edge.bundle,[pathC,boxStartC,,,cornersC,labelC]=drawBundledEdgeSegment(graph,edge,bundle);if(lineCanvases.push(pathC),cornerCanvases.push(cornersC),boxStartCanvases.push(boxStartC),labelCanvases.push(labelC),!processedBundles.has(bundle)){processedBundles.add(bundle);let[sharedPathC,sharedCornersC]=drawBundleSharedPath(graph,bundle);if(lineCanvases.push(sharedPathC),cornerCanvases.push(sharedCornersC),bundle.type==="fan-in"){let arrowHeadC=drawBundleArrowhead(graph,bundle);arrowHeadEndCanvases.push(arrowHeadC)}let junctionC=drawJunctionCharacter(graph,bundle);junctionCanvases.push(junctionC)}if(bundle.type==="fan-out"&&edge.hasArrowEnd){let arrowHeadC=drawBundledEdgeArrowhead(graph,edge);arrowHeadEndCanvases.push(arrowHeadC)}}else{let[pathC,boxStartC,arrowHeadEndC,arrowHeadStartC,cornersC,labelC]=drawArrow(graph,edge);lineCanvases.push(pathC),cornerCanvases.push(cornersC),arrowHeadEndCanvases.push(arrowHeadEndC),arrowHeadStartCanvases.push(arrowHeadStartC),boxStartCanvases.push(boxStartC),labelCanvases.push(labelC)}graph.canvas=mergeCanvases(graph.canvas,zero,useAscii,...lineCanvases),fillRolesFromCanvases(graph.roleCanvas,lineCanvases,zero,"line"),graph.canvas=mergeCanvases(graph.canvas,zero,useAscii,...cornerCanvases),fillRolesFromCanvases(graph.roleCanvas,cornerCanvases,zero,"corner"),graph.canvas=mergeCanvases(graph.canvas,zero,useAscii,...junctionCanvases),fillRolesFromCanvases(graph.roleCanvas,junctionCanvases,zero,"junction"),graph.canvas=mergeCanvases(graph.canvas,zero,useAscii,...arrowHeadEndCanvases),fillRolesFromCanvases(graph.roleCanvas,arrowHeadEndCanvases,zero,"arrow"),graph.canvas=mergeCanvases(graph.canvas,zero,useAscii,...boxStartCanvases),fillRolesFromCanvases(graph.roleCanvas,boxStartCanvases,zero,"junction"),graph.canvas=mergeCanvases(graph.canvas,zero,useAscii,...arrowHeadStartCanvases),fillRolesFromCanvases(graph.roleCanvas,arrowHeadStartCanvases,zero,"arrow"),graph.canvas=mergeCanvases(graph.canvas,zero,useAscii,...labelCanvases);for(let label of labelCanvases)clearLabelGaps(graph.canvas,label);fillRolesFromCanvases(graph.roleCanvas,labelCanvases,zero,"text");for(let sg of graph.subgraphs){if(sg.nodes.length===0)continue;let[labelCanvas,offset]=drawSubgraphLabel(sg,graph);graph.canvas=mergeCanvases(graph.canvas,offset,useAscii,labelCanvas),fillRolesFromCanvas(graph.roleCanvas,labelCanvas,offset,"text")}return graph.canvas}function gridToDrawingCoord(graph,c,dir){let target=dir?{x:c.x+dir.x,y:c.y+dir.y}:c,x=0;for(let col=0;col<target.x;col++)x+=graph.columnWidth.get(col)??0;let y=0;for(let row=0;row<target.y;row++)y+=graph.rowHeight.get(row)??0;let colW=graph.columnWidth.get(target.x)??0,rowH=graph.rowHeight.get(target.y)??0;return{x:x+Math.floor(colW/2)+graph.offsetX,y:y+Math.floor(rowH/2)+graph.offsetY}}function lineToDrawing(graph,line){return line.map(c=>gridToDrawingCoord(graph,c))}function reserveSpotInGrid(graph,node,requested,effectiveDir){let dir=effectiveDir??getEffectiveDirection2(graph,node);if(graph.grid.has(gridKey(requested)))return dir==="LR"?reserveSpotInGrid(graph,node,{x:requested.x,y:requested.y+4},dir):reserveSpotInGrid(graph,node,{x:requested.x+4,y:requested.y},dir);for(let dx=0;dx<3;dx++)for(let dy=0;dy<3;dy++){let reserved={x:requested.x+dx,y:requested.y+dy};graph.grid.set(gridKey(reserved),node)}return node.gridCoord=requested,requested}function setColumnWidth(graph,node){let gc=node.gridCoord,padding=graph.config.boxBorderPadding,shapeDims=getShapeDimensions(node.shape,node.displayLabel,{useAscii:graph.config.useAscii,padding}),colWidths=shapeDims.gridColumns,rowHeights=shapeDims.gridRows;for(let idx=0;idx<colWidths.length;idx++){let xCoord=gc.x+idx,current=graph.columnWidth.get(xCoord)??0;graph.columnWidth.set(xCoord,Math.max(current,colWidths[idx]))}for(let idx=0;idx<rowHeights.length;idx++){let yCoord=gc.y+idx,current=graph.rowHeight.get(yCoord)??0;graph.rowHeight.set(yCoord,Math.max(current,rowHeights[idx]))}if(gc.x>0){let current=graph.columnWidth.get(gc.x-1)??0;graph.columnWidth.set(gc.x-1,Math.max(current,graph.config.paddingX))}if(gc.y>0){let basePadding=graph.config.paddingY;hasIncomingEdgeFromOutsideSubgraph(graph,node)&&(basePadding+=4);let current=graph.rowHeight.get(gc.y-1)??0;graph.rowHeight.set(gc.y-1,Math.max(current,basePadding))}}function increaseGridSizeForPath(graph,path){for(let c of path)graph.columnWidth.has(c.x)||graph.columnWidth.set(c.x,Math.floor(graph.config.paddingX/2)),graph.rowHeight.has(c.y)||graph.rowHeight.set(c.y,Math.floor(graph.config.paddingY/2))}function isNodeInAnySubgraph(graph,node){return graph.subgraphs.some(sg=>sg.nodes.includes(node))}function getNodeSubgraph(graph,node){let innermost=null;for(let sg of graph.subgraphs)sg.nodes.includes(node)&&(!innermost||isAncestorOrSelf2(innermost,sg))&&(innermost=sg);return innermost}function isAncestorOrSelf2(candidate,target){let current=target;for(;current!==null;){if(current===candidate)return!0;current=current.parent}return!1}function getEffectiveDirection2(graph,node){let sg=getNodeSubgraph(graph,node);return sg?.direction?sg.direction:graph.config.graphDirection}function hasIncomingEdgeFromOutsideSubgraph(graph,node){let nodeSg=getNodeSubgraph(graph,node);if(!nodeSg)return!1;let hasExternalEdge=!1;for(let edge of graph.edges)if(edge.to===node&&getNodeSubgraph(graph,edge.from)!==nodeSg){hasExternalEdge=!0;break}if(!hasExternalEdge)return!1;for(let otherNode of nodeSg.nodes){if(otherNode===node||!otherNode.gridCoord)continue;let otherHasExternal=!1;for(let edge of graph.edges)if(edge.to===otherNode&&getNodeSubgraph(graph,edge.from)!==nodeSg){otherHasExternal=!0;break}if(otherHasExternal&&otherNode.gridCoord.y<node.gridCoord.y)return!1}return!0}function calculateSubgraphBoundingBox(graph,sg){if(sg.nodes.length===0)return;let minX=1e6,minY=1e6,maxX=-1e6,maxY=-1e6;for(let child of sg.children)calculateSubgraphBoundingBox(graph,child),child.nodes.length>0&&(minX=Math.min(minX,child.minX),minY=Math.min(minY,child.minY),maxX=Math.max(maxX,child.maxX),maxY=Math.max(maxY,child.maxY));for(let node of sg.nodes){if(!node.drawingCoord||!node.drawing)continue;let nodeMinX=node.drawingCoord.x,nodeMinY=node.drawingCoord.y,nodeMaxX=nodeMinX+node.drawing.length-1,nodeMaxY=nodeMinY+node.drawing[0].length-1;minX=Math.min(minX,nodeMinX),minY=Math.min(minY,nodeMinY),maxX=Math.max(maxX,nodeMaxX),maxY=Math.max(maxY,nodeMaxY)}let subgraphPadding=2,subgraphLabelSpace=2;sg.minX=minX-subgraphPadding,sg.minY=minY-subgraphPadding-subgraphLabelSpace,sg.maxX=maxX+subgraphPadding,sg.maxY=maxY+subgraphPadding}function ensureSubgraphSpacing(graph){let rootSubgraphs=graph.subgraphs.filter(sg=>sg.parent===null&&sg.nodes.length>0);for(let i=0;i<rootSubgraphs.length;i++)for(let j=i+1;j<rootSubgraphs.length;j++){let sg1=rootSubgraphs[i],sg2=rootSubgraphs[j];sg1.minX<sg2.maxX&&sg1.maxX>sg2.minX&&(sg1.maxY>=sg2.minY-1&&sg1.minY<sg2.minY?sg2.minY=sg1.maxY+1+1:sg2.maxY>=sg1.minY-1&&sg2.minY<sg1.minY&&(sg1.minY=sg2.maxY+1+1)),sg1.minY<sg2.maxY&&sg1.maxY>sg2.minY&&(sg1.maxX>=sg2.minX-1&&sg1.minX<sg2.minX?sg2.minX=sg1.maxX+1+1:sg2.maxX>=sg1.minX-1&&sg2.minX<sg1.minX&&(sg1.minX=sg2.maxX+1+1))}}function calculateSubgraphBoundingBoxes(graph){for(let sg of graph.subgraphs)calculateSubgraphBoundingBox(graph,sg);ensureSubgraphSpacing(graph)}function offsetDrawingForSubgraphs(graph){if(graph.subgraphs.length===0)return;let minX=0,minY=0;for(let sg of graph.subgraphs)minX=Math.min(minX,sg.minX),minY=Math.min(minY,sg.minY);let offsetX=-minX,offsetY=-minY;if(!(offsetX===0&&offsetY===0)){graph.offsetX=offsetX,graph.offsetY=offsetY;for(let sg of graph.subgraphs)sg.minX+=offsetX,sg.minY+=offsetY,sg.maxX+=offsetX,sg.maxY+=offsetY;for(let node of graph.nodes)node.drawingCoord&&(node.drawingCoord.x+=offsetX,node.drawingCoord.y+=offsetY)}}function createMapping(graph){let dir=graph.config.graphDirection,highestPositionPerLevel=new Array(100).fill(0),nodesFound=new Set,initialRoots=[];for(let node of graph.nodes){nodesFound.has(node.name)||initialRoots.push(node),nodesFound.add(node.name);for(let child of getChildren(graph,node))nodesFound.add(child.name)}let rootNodes=initialRoots.filter(node=>{let nodeSg=getNodeSubgraph(graph,node);if(!nodeSg)return!0;for(let edge of graph.edges)if(edge.to===node&&getNodeSubgraph(graph,edge.from)!==nodeSg)return!1;return!0}),hasExternalRoots=!1,hasSubgraphRootsWithEdges=!1;for(let node of rootNodes)isNodeInAnySubgraph(graph,node)?getChildren(graph,node).length>0&&(hasSubgraphRootsWithEdges=!0):hasExternalRoots=!0;let shouldSeparate=dir==="LR"&&hasExternalRoots&&hasSubgraphRootsWithEdges,externalRootNodes,subgraphRootNodes=[];shouldSeparate?(externalRootNodes=rootNodes.filter(n=>!isNodeInAnySubgraph(graph,n)),subgraphRootNodes=rootNodes.filter(n=>isNodeInAnySubgraph(graph,n))):externalRootNodes=rootNodes;for(let node of externalRootNodes){let requested=dir==="LR"?{x:0,y:highestPositionPerLevel[0]}:{x:highestPositionPerLevel[0],y:0};reserveSpotInGrid(graph,graph.nodes[node.index],requested),highestPositionPerLevel[0]=highestPositionPerLevel[0]+4}if(shouldSeparate&&subgraphRootNodes.length>0)for(let node of subgraphRootNodes){let requested=dir==="LR"?{x:4,y:highestPositionPerLevel[4]}:{x:highestPositionPerLevel[4],y:4};reserveSpotInGrid(graph,graph.nodes[node.index],requested),highestPositionPerLevel[4]=highestPositionPerLevel[4]+4}let placedCount=externalRootNodes.length+subgraphRootNodes.length;for(;placedCount<graph.nodes.length;){let prevCount=placedCount;for(let node of graph.nodes){if(node.gridCoord===null)continue;let gc=node.gridCoord;for(let child of getChildren(graph,node)){if(child.gridCoord!==null)continue;let parentSg=getNodeSubgraph(graph,node),childSg=getNodeSubgraph(graph,child),edgeDir=parentSg&&parentSg===childSg&&parentSg.direction?parentSg.direction:graph.config.graphDirection,childLevel=edgeDir==="LR"?gc.x+4:gc.y+4,highestPosition;edgeDir!==graph.config.graphDirection?highestPosition=edgeDir==="LR"?gc.y:gc.x:highestPosition=highestPositionPerLevel[childLevel];let requested=edgeDir==="LR"?{x:childLevel,y:highestPosition}:{x:highestPosition,y:childLevel};reserveSpotInGrid(graph,graph.nodes[child.index],requested,edgeDir),edgeDir===graph.config.graphDirection&&(highestPositionPerLevel[childLevel]=highestPosition+4),placedCount++}}if(placedCount===prevCount)break}for(let node of graph.nodes)setColumnWidth(graph,node);graph.bundles=analyzeEdgeBundles(graph),processBundles(graph);for(let edge of graph.edges){if(edge.bundle&&edge.path.length>0){increaseGridSizeForPath(graph,edge.path),determineLabelLine(graph,edge);continue}determinePath(graph,edge),increaseGridSizeForPath(graph,edge.path),determineLabelLine(graph,edge)}for(let node of graph.nodes)node.drawingCoord=gridToDrawingCoord(graph,node.gridCoord),node.drawing=drawBox(node,graph);setCanvasSizeToGrid(graph.canvas,graph.columnWidth,graph.rowHeight),setRoleCanvasSizeToGrid(graph.roleCanvas,graph.columnWidth,graph.rowHeight),calculateSubgraphBoundingBoxes(graph),offsetDrawingForSubgraphs(graph)}function getEdgesFromNode(graph,node){return graph.edges.filter(e=>e.from.name===node.name)}function getChildren(graph,node){return getEdgesFromNode(graph,node).map(e=>e.to)}function parseSequenceDiagram(lines){let diagram={actors:[],messages:[],blocks:[],notes:[]},actorIds=new Set,blockStack=[];for(let i=1;i<lines.length;i++){let line=lines[i],actorMatch=line.match(/^(participant|actor)\s+(\S+?)(?:\s+as\s+(.+))?$/);if(actorMatch){let type=actorMatch[1],id=actorMatch[2],rawLabel=actorMatch[3]?.trim()??id,label=normalizeBrTags(rawLabel);actorIds.has(id)||(actorIds.add(id),diagram.actors.push({id,label,type}));continue}let noteMatch=line.match(/^Note\s+(left of|right of|over)\s+([^:]+):\s*(.+)$/i);if(noteMatch){let posStr=noteMatch[1].toLowerCase(),actorsStr=noteMatch[2].trim(),text=normalizeBrTags(noteMatch[3].trim()),noteActorIds=actorsStr.split(",").map(s=>s.trim());for(let aid of noteActorIds)ensureActor(diagram,actorIds,aid);let position="over";posStr==="left of"?position="left":posStr==="right of"&&(position="right"),diagram.notes.push({actorIds:noteActorIds,text,position,afterIndex:diagram.messages.length-1});continue}let blockMatch=line.match(/^(loop|alt|opt|par|critical|break|rect)\s*(.*)$/);if(blockMatch){let blockType=blockMatch[1],rawBlockLabel=blockMatch[2]?.trim()??"",label=normalizeBrTags(rawBlockLabel);blockStack.push({type:blockType,label,startIndex:diagram.messages.length,dividers:[]});continue}let dividerMatch=line.match(/^(else|and)\s*(.*)$/);if(dividerMatch&&blockStack.length>0){let rawDividerLabel=dividerMatch[2]?.trim()??"",label=normalizeBrTags(rawDividerLabel);blockStack[blockStack.length-1].dividers.push({index:diagram.messages.length,label});continue}if(line==="end"&&blockStack.length>0){let completed=blockStack.pop();diagram.blocks.push({type:completed.type,label:completed.label,startIndex:completed.startIndex,endIndex:Math.max(diagram.messages.length-1,completed.startIndex),dividers:completed.dividers});continue}let msgMatch=line.match(/^(\S+?)\s*(--?>?>|--?[)x]|--?>>|--?>)\s*([+-]?)(\S+?)\s*:\s*(.+)$/);if(msgMatch){let from=msgMatch[1],arrow=msgMatch[2],activationMark=msgMatch[3],to=msgMatch[4],label=normalizeBrTags(msgMatch[5].trim());ensureActor(diagram,actorIds,from),ensureActor(diagram,actorIds,to);let lineStyle=arrow.startsWith("--")?"dashed":"solid",arrowHead=arrow.includes(">>")||arrow.includes("x")?"filled":"open",msg={from,to,label,lineStyle,arrowHead};activationMark==="+"&&(msg.activate=!0),activationMark==="-"&&(msg.deactivate=!0),diagram.messages.push(msg);continue}let simpleMsgMatch=line.match(/^(\S+?)\s*(->>|-->>|-\)|--\)|-x|--x|->|-->)\s*([+-]?)(\S+?)\s*:\s*(.+)$/);if(simpleMsgMatch){let from=simpleMsgMatch[1],arrow=simpleMsgMatch[2],activationMark=simpleMsgMatch[3],to=simpleMsgMatch[4],label=normalizeBrTags(simpleMsgMatch[5].trim());ensureActor(diagram,actorIds,from),ensureActor(diagram,actorIds,to);let lineStyle=arrow.startsWith("--")?"dashed":"solid",arrowHead=arrow.includes(">>")||arrow.includes("x")?"filled":"open",msg={from,to,label,lineStyle,arrowHead};activationMark==="+"&&(msg.activate=!0),activationMark==="-"&&(msg.deactivate=!0),diagram.messages.push(msg);continue}}return diagram}function ensureActor(diagram,actorIds,id){actorIds.has(id)||(actorIds.add(id),diagram.actors.push({id,label:id,type:"participant"}))}function renderSequenceAscii(text,config,colorMode,theme){let lines=text.split(`
7`).map(l=>l.trim()).filter(l=>l.length>0&&!l.startsWith("%%")),diagram=parseSequenceDiagram(lines);if(diagram.actors.length===0)return"";let useAscii=config.useAscii,H=useAscii?"-":"\u2500",V=useAscii?"|":"\u2502",TL=useAscii?"+":"\u250C",TR=useAscii?"+":"\u2510",BL=useAscii?"+":"\u2514",BR=useAscii?"+":"\u2518",JT=useAscii?"+":"\u252C",JB=useAscii?"+":"\u2534",JL=useAscii?"+":"\u251C",JR=useAscii?"+":"\u2524",actorIdx=new Map;diagram.actors.forEach((a,i)=>actorIdx.set(a.id,i));let boxPad=1,halfBox=diagram.actors.map(a=>maxLineWidth(a.label)+2*boxPad+2).map(w=>Math.ceil(w/2)),actorBoxHeights=diagram.actors.map(a=>lineCount(a.label)+2),actorBoxH=Math.max(...actorBoxHeights,3),adjMaxWidth=new Array(Math.max(diagram.actors.length-1,0)).fill(0);for(let msg of diagram.messages){let fi=actorIdx.get(msg.from),ti=actorIdx.get(msg.to);if(fi===ti)continue;let lo=Math.min(fi,ti),hi=Math.max(fi,ti),needed=maxLineWidth(msg.label)+4,numGaps=hi-lo,perGap=Math.ceil(needed/numGaps);for(let g=lo;g<hi;g++)adjMaxWidth[g]=Math.max(adjMaxWidth[g],perGap)}let llX=[halfBox[0]];for(let i=1;i<diagram.actors.length;i++){let gap=Math.max(halfBox[i-1]+halfBox[i]+2,adjMaxWidth[i-1]+2,10);llX[i]=llX[i-1]+gap}let msgArrowY=[],msgLabelY=[],blockStartY=new Map,blockEndY=new Map,divYMap=new Map,notePositions=[],curY=actorBoxH;for(let m=0;m<diagram.messages.length;m++){for(let b=0;b<diagram.blocks.length;b++)diagram.blocks[b].startIndex===m&&(curY+=2,blockStartY.set(b,curY-1));for(let b=0;b<diagram.blocks.length;b++)for(let d=0;d<diagram.blocks[b].dividers.length;d++)diagram.blocks[b].dividers[d].index===m&&(curY+=1,divYMap.set(`${b}:${d}`,curY),curY+=1);curY+=1;let msg=diagram.messages[m],isSelf=msg.from===msg.to,msgLineCount=lineCount(msg.label);isSelf?(msgLabelY[m]=curY+1,msgArrowY[m]=curY,curY+=2+msgLineCount):(msgLabelY[m]=curY,msgArrowY[m]=curY+msgLineCount,curY+=msgLineCount+1);for(let n=0;n<diagram.notes.length;n++)if(diagram.notes[n].afterIndex===m){curY+=1;let note=diagram.notes[n],nLines=splitLines(note.text),nWidth=Math.max(...nLines.map(l=>l.length))+4,nHeight=nLines.length+2,aIdx=actorIdx.get(note.actorIds[0])??0,nx;if(note.position==="left")nx=llX[aIdx]-nWidth-1;else if(note.position==="right")nx=llX[aIdx]+2;else if(note.actorIds.length>=2){let aIdx2=actorIdx.get(note.actorIds[1])??aIdx;nx=Math.floor((llX[aIdx]+llX[aIdx2])/2)-Math.floor(nWidth/2)}else nx=llX[aIdx]-Math.floor(nWidth/2);nx=Math.max(0,nx),notePositions.push({x:nx,y:curY,width:nWidth,height:nHeight,lines:nLines}),curY+=nHeight}for(let b=0;b<diagram.blocks.length;b++)diagram.blocks[b].endIndex===m&&(curY+=1,blockEndY.set(b,curY),curY+=1)}curY+=1;let footerY=curY,totalH=footerY+actorBoxH,lastLL=llX[llX.length-1]??0,lastHalf=halfBox[halfBox.length-1]??0,totalW=lastLL+lastHalf+2;for(let m=0;m<diagram.messages.length;m++){let msg=diagram.messages[m];if(msg.from===msg.to){let fi=actorIdx.get(msg.from),selfRight=llX[fi]+6+2+msg.label.length;totalW=Math.max(totalW,selfRight+1)}}for(let np of notePositions)totalW=Math.max(totalW,np.x+np.width+1);let canvas=mkCanvas(totalW,totalH-1),rc=mkRoleCanvas(totalW,totalH-1);function setC(x,y,ch,role){x>=0&&x<canvas.length&&y>=0&&y<(canvas[0]?.length??0)&&(canvas[x][y]=ch,setRole(rc,x,y,role))}function drawActorBox(cx,topY,label){let lines2=splitLines(label),maxW=maxLineWidth(label),w=maxW+2*boxPad+2,h=lines2.length+2,left=cx-Math.floor(w/2);setC(left,topY,TL,"border");for(let x=1;x<w-1;x++)setC(left+x,topY,H,"border");setC(left+w-1,topY,TR,"border");for(let i=0;i<lines2.length;i++){let row=topY+1+i;setC(left,row,V,"border"),setC(left+w-1,row,V,"border");let line=lines2[i],ls=left+1+boxPad+Math.floor((maxW-line.length)/2);for(let j=0;j<line.length;j++)setC(ls+j,row,line[j],"text")}let bottomY=topY+h-1;setC(left,bottomY,BL,"border");for(let x=1;x<w-1;x++)setC(left+x,bottomY,H,"border");setC(left+w-1,bottomY,BR,"border")}for(let i=0;i<diagram.actors.length;i++){let x=llX[i];for(let y=actorBoxH;y<=footerY;y++)setC(x,y,V,"line")}for(let i=0;i<diagram.actors.length;i++){let actor=diagram.actors[i];drawActorBox(llX[i],0,actor.label),drawActorBox(llX[i],footerY,actor.label),useAscii||(setC(llX[i],actorBoxH-1,JT,"junction"),setC(llX[i],footerY,JB,"junction"))}for(let m=0;m<diagram.messages.length;m++){let msg=diagram.messages[m],fi=actorIdx.get(msg.from),ti=actorIdx.get(msg.to),fromX=llX[fi],toX=llX[ti],isSelf=fi===ti,isDashed=msg.lineStyle==="dashed",isFilled=msg.arrowHead==="filled",lineChar=isDashed?useAscii?".":"\u254C":H;if(isSelf){let y0=msgArrowY[m],loopW=Math.max(4,4);setC(fromX,y0,JL,"junction");for(let x=fromX+1;x<fromX+loopW;x++)setC(x,y0,lineChar,"line");setC(fromX+loopW,y0,useAscii?"+":"\u2510","corner"),setC(fromX+loopW,y0+1,V,"line");let labelX=fromX+loopW+2;for(let i=0;i<msg.label.length;i++)labelX+i<totalW&&setC(labelX+i,y0+1,msg.label[i],"text");let arrowChar=isFilled?useAscii?"<":"\u25C0":useAscii?"<":"\u25C1";setC(fromX,y0+2,arrowChar,"arrow");for(let x=fromX+1;x<fromX+loopW;x++)setC(x,y0+2,lineChar,"line");setC(fromX+loopW,y0+2,useAscii?"+":"\u2518","corner")}else{let labelY=msgLabelY[m],arrowY=msgArrowY[m],leftToRight=fromX<toX,midX=Math.floor((fromX+toX)/2),msgLines=splitLines(msg.label);for(let lineIdx=0;lineIdx<msgLines.length;lineIdx++){let line=msgLines[lineIdx],labelStart=midX-Math.floor(line.length/2),y=labelY+lineIdx;for(let i=0;i<line.length;i++){let lx=labelStart+i;lx>=0&&lx<totalW&&setC(lx,y,line[i],"text")}}if(leftToRight){for(let x=fromX+1;x<toX;x++)setC(x,arrowY,lineChar,"line");setC(toX,arrowY,isFilled?useAscii?">":"\u25B6":useAscii?">":"\u25B7","arrow")}else{for(let x=toX+1;x<fromX;x++)setC(x,arrowY,lineChar,"line");setC(toX,arrowY,isFilled?useAscii?"<":"\u25C0":useAscii?"<":"\u25C1","arrow")}}}for(let b=0;b<diagram.blocks.length;b++){let block=diagram.blocks[b],topY=blockStartY.get(b),botY=blockEndY.get(b);if(topY===void 0||botY===void 0)continue;let minLX=totalW,maxLX=0;for(let m=block.startIndex;m<=block.endIndex&&!(m>=diagram.messages.length);m++){let msg=diagram.messages[m],f=actorIdx.get(msg.from)??0,t=actorIdx.get(msg.to)??0;minLX=Math.min(minLX,llX[Math.min(f,t)]),maxLX=Math.max(maxLX,llX[Math.max(f,t)])}let bLeft=Math.max(0,minLX-4),bRight=Math.min(totalW-1,maxLX+4);setC(bLeft,topY,TL,"border");for(let x=bLeft+1;x<bRight;x++)setC(x,topY,H,"border");setC(bRight,topY,TR,"border");let hdrLabel=block.label?`${block.type} [${block.label}]`:block.type,hdrLines=splitLines(hdrLabel);for(let lineIdx=0;lineIdx<hdrLines.length&&topY+lineIdx<botY;lineIdx++){let line=hdrLines[lineIdx];for(let i=0;i<line.length&&bLeft+1+i<bRight;i++)setC(bLeft+1+i,topY+lineIdx,line[i],"text")}setC(bLeft,botY,BL,"border");for(let x=bLeft+1;x<bRight;x++)setC(x,botY,H,"border");setC(bRight,botY,BR,"border");for(let y=topY+1;y<botY;y++)setC(bLeft,y,V,"border"),setC(bRight,y,V,"border");for(let d=0;d<block.dividers.length;d++){let dY=divYMap.get(`${b}:${d}`);if(dY===void 0)continue;let dashChar=isDashedH();setC(bLeft,dY,JL,"junction");for(let x=bLeft+1;x<bRight;x++)setC(x,dY,dashChar,"line");setC(bRight,dY,JR,"junction");let dLabel=block.dividers[d].label;if(dLabel){let dStr=`[${dLabel}]`;for(let i=0;i<dStr.length&&bLeft+1+i<bRight;i++)setC(bLeft+1+i,dY,dStr[i],"text")}}}for(let np of notePositions){increaseSize(canvas,np.x+np.width,np.y+np.height),increaseRoleCanvasSize(rc,np.x+np.width,np.y+np.height),setC(np.x,np.y,TL,"border");for(let x=1;x<np.width-1;x++)setC(np.x+x,np.y,H,"border");setC(np.x+np.width-1,np.y,TR,"border");for(let l=0;l<np.lines.length;l++){let ly=np.y+1+l;setC(np.x,ly,V,"border"),setC(np.x+np.width-1,ly,V,"border");for(let i=0;i<np.lines[l].length;i++)setC(np.x+2+i,ly,np.lines[l][i],"text")}let by=np.y+np.height-1;setC(np.x,by,BL,"border");for(let x=1;x<np.width-1;x++)setC(np.x+x,by,H,"border");setC(np.x+np.width-1,by,BR,"border")}return canvasToString(canvas,{roleCanvas:rc,colorMode,theme});function isDashedH(){return useAscii?"-":"\u254C"}}function parseClassDiagram(lines){let diagram={classes:[],relationships:[],namespaces:[]},classMap=new Map,currentNamespace=null,currentClass=null,braceDepth=0;for(let i=1;i<lines.length;i++){let line=lines[i];if(currentClass&&braceDepth>0){if(line==="}"){braceDepth--,braceDepth===0&&(currentClass=null);continue}let annotMatch=line.match(/^<<(\w+)>>$/);if(annotMatch){currentClass.annotation=annotMatch[1];continue}let member=parseMember(line);member&&(member.isMethod?currentClass.methods.push(member.member):currentClass.attributes.push(member.member));continue}let nsMatch=line.match(/^namespace\s+(\S+)\s*\{$/);if(nsMatch){currentNamespace={name:nsMatch[1],classIds:[]};continue}if(line==="}"&&currentNamespace){diagram.namespaces.push(currentNamespace),currentNamespace=null;continue}let classBlockMatch=line.match(/^class\s+(\S+?)(?:\s*~(\w+)~)?\s*\{$/);if(classBlockMatch){let id=classBlockMatch[1],generic=classBlockMatch[2],cls=ensureClass(classMap,id);generic&&(cls.label=`${id}<${generic}>`),currentClass=cls,braceDepth=1,currentNamespace&&currentNamespace.classIds.push(id);continue}let classOnlyMatch=line.match(/^class\s+(\S+?)(?:\s*~(\w+)~)?\s*$/);if(classOnlyMatch){let id=classOnlyMatch[1],generic=classOnlyMatch[2],cls=ensureClass(classMap,id);generic&&(cls.label=`${id}<${generic}>`),currentNamespace&&currentNamespace.classIds.push(id);continue}let inlineAnnotMatch=line.match(/^class\s+(\S+?)\s*\{\s*<<(\w+)>>\s*\}$/);if(inlineAnnotMatch){let cls=ensureClass(classMap,inlineAnnotMatch[1]);cls.annotation=inlineAnnotMatch[2];continue}let inlineAttrMatch=line.match(/^(\S+?)\s*:\s*(.+)$/);if(inlineAttrMatch){let rest=inlineAttrMatch[2];if(!rest.match(/<\|--|--|\*--|o--|-->|\.\.>|\.\.\|>/)){let cls=ensureClass(classMap,inlineAttrMatch[1]),member=parseMember(rest);member&&(member.isMethod?cls.methods.push(member.member):cls.attributes.push(member.member));continue}}let rel=parseRelationship(line);if(rel){ensureClass(classMap,rel.from),ensureClass(classMap,rel.to),diagram.relationships.push(rel);continue}}return diagram.classes=[...classMap.values()],diagram}function ensureClass(classMap,id){let cls=classMap.get(id);return cls||(cls={id,label:id,attributes:[],methods:[]},classMap.set(id,cls)),cls}function parseMember(line){let trimmed=line.trim().replace(/;$/,"");if(!trimmed)return null;let visibility="",rest=trimmed;/^[+\-#~]/.test(rest)&&(visibility=rest[0],rest=rest.slice(1).trim());let methodMatch=rest.match(/^(.+?)\(([^)]*)\)(?:\s*(.+))?$/);if(methodMatch){let name2=methodMatch[1].trim(),params=methodMatch[2]?.trim()||void 0,type2=methodMatch[3]?.trim(),isStatic2=name2.endsWith("$")||rest.includes("$"),isAbstract2=name2.endsWith("*")||rest.includes("*");return{member:{visibility,name:name2.replace(/[$*]$/,""),type:type2||void 0,isStatic:isStatic2,isAbstract:isAbstract2,isMethod:!0,params},isMethod:!0}}let parts=rest.split(/\s+/),name,type;parts.length>=2?(type=parts[0],name=parts.slice(1).join(" ")):name=parts[0]??rest;let isStatic=name.endsWith("$"),isAbstract=name.endsWith("*");return{member:{visibility,name:name.replace(/[$*]$/,""),type:type||void 0,isStatic,isAbstract,isMethod:!1},isMethod:!1}}function parseRelationship(line){let match=line.match(/^(\S+?)\s+(?:"([^"]*?)"\s+)?(<\|--|<\|\.\.|\*--|o--|-->|--\*|--o|--\|>|\.\.>|\.\.\|>|<--|<\.\.?|--)\s+(?:"([^"]*?)"\s+)?(\S+?)(?:\s*:\s*(.+))?$/);if(!match)return null;let from=match[1],rawFromCardinality=match[2],fromCardinality=rawFromCardinality?normalizeBrTags(rawFromCardinality):void 0,arrow=match[3].trim(),rawToCardinality=match[4],toCardinality=rawToCardinality?normalizeBrTags(rawToCardinality):void 0,to=match[5],rawLabel=match[6]?.trim(),label=rawLabel?normalizeBrTags(rawLabel):void 0,parsed=parseArrow(arrow);return parsed?{from,to,type:parsed.type,markerAt:parsed.markerAt,label,fromCardinality,toCardinality}:null}function parseArrow(arrow){switch(arrow.trim()){case"<|--":return{type:"inheritance",markerAt:"from"};case"--|>":return{type:"inheritance",markerAt:"to"};case"<|..":return{type:"realization",markerAt:"from"};case"..|>":return{type:"realization",markerAt:"to"};case"*--":return{type:"composition",markerAt:"from"};case"--*":return{type:"composition",markerAt:"to"};case"o--":return{type:"aggregation",markerAt:"from"};case"--o":return{type:"aggregation",markerAt:"to"};case"-->":return{type:"association",markerAt:"to"};case"<--":return{type:"association",markerAt:"from"};case"..>":return{type:"dependency",markerAt:"to"};case"<..":return{type:"dependency",markerAt:"from"};case"--":return{type:"association",markerAt:"to"};default:return null}}function classifyBoxChar(ch){return/^[┌┐└┘├┤┬┴┼│─╭╮╰╯+\-|]$/.test(ch)?"border":"text"}function formatMember(m){let vis=m.visibility||"",type=m.type?`: ${m.type}`:"";return`${vis}${m.name}${type}`}function buildClassSections(cls){let header=[];cls.annotation&&header.push(`<<${cls.annotation}>>`);let nameLines=splitLines(cls.label);header.push(...nameLines);let attrs=cls.attributes.map(formatMember),methods=cls.methods.map(formatMember);return attrs.length===0&&methods.length===0?[header]:methods.length===0?[header,attrs]:[header,attrs,methods]}function getRelMarker(type,markerAt){return{type,markerAt,dashed:type==="dependency"||type==="realization"}}function getMarkerShape(type,useAscii,direction){switch(type){case"inheritance":case"realization":return direction==="down"?useAscii?"^":"\u25B3":direction==="up"?useAscii?"v":"\u25BD":direction==="left"?useAscii?">":"\u25C1":useAscii?"<":"\u25B7";case"composition":return useAscii?"*":"\u25C6";case"aggregation":return useAscii?"o":"\u25C7";case"association":case"dependency":return direction==="down"?useAscii?"v":"\u25BC":direction==="up"?useAscii?"^":"\u25B2":direction==="left"?useAscii?"<":"\u25C0":useAscii?">":"\u25B6"}}function renderClassAscii(text,config,colorMode,theme){let lines=text.split(`
8`).map(l=>l.trim()).filter(l=>l.length>0&&!l.startsWith("%%")),diagram=parseClassDiagram(lines);if(diagram.classes.length===0)return"";let useAscii=config.useAscii,hGap=4,vGap=3,classSections=new Map,classBoxW=new Map,classBoxH=new Map;for(let cls of diagram.classes){let sections=buildClassSections(cls);classSections.set(cls.id,sections);let maxTextW=0;for(let section of sections)for(let line of section)maxTextW=Math.max(maxTextW,line.length);let boxW=maxTextW+4,totalLines=0;for(let section of sections)totalLines+=Math.max(section.length,1);let boxH=totalLines+(sections.length-1)+2;classBoxW.set(cls.id,boxW),classBoxH.set(cls.id,boxH)}let classById=new Map;for(let cls of diagram.classes)classById.set(cls.id,cls);let parents=new Map,children=new Map;for(let rel of diagram.relationships){let isHierarchical=rel.type==="inheritance"||rel.type==="realization",parentId=isHierarchical&&rel.markerAt==="to"?rel.to:rel.from,childId=isHierarchical&&rel.markerAt==="to"?rel.from:rel.to;parents.has(childId)||parents.set(childId,new Set),parents.get(childId).add(parentId),children.has(parentId)||children.set(parentId,new Set),children.get(parentId).add(childId)}let level=new Map,queue=diagram.classes.filter(c=>!parents.has(c.id)||parents.get(c.id).size===0).map(c=>c.id);for(let id of queue)level.set(id,0);let levelCap=diagram.classes.length-1,qi=0;for(;qi<queue.length;){let id=queue[qi++],childSet=children.get(id);if(childSet)for(let childId of childSet){let newLevel=(level.get(id)??0)+1;newLevel>levelCap||(!level.has(childId)||level.get(childId)<newLevel)&&(level.set(childId,newLevel),queue.push(childId))}}for(let cls of diagram.classes)level.has(cls.id)||level.set(cls.id,0);let maxLevel=Math.max(...level.values(),0),levelGroups=Array.from({length:maxLevel+1},()=>[]);for(let cls of diagram.classes)levelGroups[level.get(cls.id)].push(cls.id);let placed=new Map,currentY=0;for(let lv=0;lv<=maxLevel;lv++){let group=levelGroups[lv];if(group.length===0)continue;let currentX=0,maxH=0;for(let id of group){let cls=classById.get(id),w=classBoxW.get(id),h=classBoxH.get(id);placed.set(id,{cls,sections:classSections.get(id),x:currentX,y:currentY,width:w,height:h}),currentX+=w+hGap,maxH=Math.max(maxH,h)}currentY+=maxH+vGap}let totalW=0,totalH=0;for(let p of placed.values())totalW=Math.max(totalW,p.x+p.width),totalH=Math.max(totalH,p.y+p.height);totalW+=4,totalH+=2;let canvas=mkCanvas(totalW-1,totalH-1),rc=mkRoleCanvas(totalW-1,totalH-1);function setC(x,y,ch,role){x>=0&&x<canvas.length&&y>=0&&y<(canvas[0]?.length??0)&&(canvas[x][y]=ch,setRole(rc,x,y,role))}for(let p of placed.values()){let boxCanvas=drawMultiBox(p.sections,useAscii);for(let bx=0;bx<boxCanvas.length;bx++)for(let by=0;by<boxCanvas[0].length;by++){let ch=boxCanvas[bx][by];if(ch!==" "){let cx=p.x+bx,cy=p.y+by;cx<totalW&&cy<totalH&&setC(cx,cy,ch,classifyBoxChar(ch))}}}let boxOccupancy=[];for(let p of placed.values())boxOccupancy.push({x1:p.x,x2:p.x+p.width-1,y1:p.y,y2:p.y+p.height-1});function isInsideBox(x,y,excludeIds){for(let[id,p]of placed.entries())if(!excludeIds?.has(id)&&x>=p.x&&x<=p.x+p.width-1&&y>=p.y&&y<=p.y+p.height-1)return!0;return!1}function findClearColumn(startX,y1,y2,excludeIds){let clear=!0;for(let y=Math.min(y1,y2);y<=Math.max(y1,y2);y++)if(isInsideBox(startX,y,excludeIds)){clear=!1;break}if(clear)return startX;for(let offset=1;offset<totalW+10;offset++){let rightX=startX+offset;clear=!0;for(let y=Math.min(y1,y2);y<=Math.max(y1,y2);y++)if(isInsideBox(rightX,y,excludeIds)){clear=!1;break}if(clear)return rightX;let leftX=startX-offset;if(leftX>=0){clear=!0;for(let y=Math.min(y1,y2);y<=Math.max(y1,y2);y++)if(isInsideBox(leftX,y,excludeIds)){clear=!1;break}if(clear)return leftX}}return totalW+2}let H=useAscii?"-":"\u2500",V=useAscii?"|":"\u2502",dashH=useAscii?".":"\u254C",dashV=useAscii?":":"\u250A";for(let rel of diagram.relationships){let fromP=placed.get(rel.from),toP=placed.get(rel.to);if(!fromP||!toP)continue;let marker=getRelMarker(rel.type,rel.markerAt),lineH=marker.dashed?dashH:H,lineV=marker.dashed?dashV:V,excludeIds=new Set([rel.from,rel.to]),fromCX=fromP.x+Math.floor(fromP.width/2),fromBY=fromP.y+fromP.height-1,toCX=toP.x+Math.floor(toP.width/2),toTY=toP.y;if(fromBY<toTY){let routeX=findClearColumn(fromCX,fromBY+1,toTY-1,excludeIds),needsDetour=routeX!==fromCX;if(routeX>=totalW&&increaseSize(canvas,routeX+2,totalH),needsDetour){let exitY=fromBY+1,entryY=toTY-1,lx1=Math.min(fromCX,routeX),rx1=Math.max(fromCX,routeX);for(let x=lx1;x<=rx1;x++)setC(x,exitY,lineH,"line");!useAscii&&exitY<(canvas[0]?.length??0)&&(fromCX<routeX?(setC(fromCX,exitY,"\u2514","corner"),setC(routeX,exitY,"\u2510","corner")):(setC(fromCX,exitY,"\u2518","corner"),setC(routeX,exitY,"\u250C","corner")));for(let y=exitY+1;y<=entryY;y++)setC(routeX,y,lineV,"line");if(routeX!==toCX){let lx2=Math.min(routeX,toCX),rx2=Math.max(routeX,toCX);for(let x=lx2;x<=rx2;x++)setC(x,entryY,lineH,"line");!useAscii&&entryY<(canvas[0]?.length??0)&&(routeX<toCX?(setC(routeX,entryY,"\u2514","corner"),setC(toCX,entryY,"\u2510","corner")):(setC(routeX,entryY,"\u2518","corner"),setC(toCX,entryY,"\u250C","corner")))}if(marker.markerAt==="to"){let markerChar=getMarkerShape(marker.type,useAscii,"down");setC(toCX,entryY,markerChar,"arrow")}if(marker.markerAt==="from"){let markerChar=getMarkerShape(marker.type,useAscii,"down");setC(fromCX,fromBY+1,markerChar,"arrow")}}else{let midY=fromBY+Math.floor((toTY-fromBY)/2);for(let y=fromBY+1;y<=midY;y++)setC(fromCX,y,lineV,"line");if(fromCX!==toCX&&midY<(canvas[0]?.length??0)){let lx=Math.min(fromCX,toCX),rx=Math.max(fromCX,toCX);for(let x=lx;x<=rx;x++)setC(x,midY,lineH,"line");useAscii||(setC(fromCX,midY,fromCX<toCX?"\u2514":"\u2518","corner"),setC(toCX,midY,fromCX<toCX?"\u2510":"\u250C","corner"))}for(let y=midY+1;y<toTY;y++)setC(toCX,y,lineV,"line");marker.markerAt==="to"&&setC(toCX,toTY-1,getMarkerShape(marker.type,useAscii,"down"),"arrow"),marker.markerAt==="from"&&setC(fromCX,fromBY+1,getMarkerShape(marker.type,useAscii,"down"),"arrow")}}else if(toP.y+toP.height-1<fromP.y){let fromTY=fromP.y,toBY=toP.y+toP.height-1,midY=toBY+Math.floor((fromTY-toBY)/2);for(let y=fromTY-1;y>=midY;y--)setC(fromCX,y,lineV,"line");if(fromCX!==toCX){let lx=Math.min(fromCX,toCX),rx=Math.max(fromCX,toCX);for(let x=lx;x<=rx;x++)setC(x,midY,lineH,"line");!useAscii&&midY>=0&&midY<totalH&&(setC(fromCX,midY,fromCX<toCX?"\u250C":"\u2510","corner"),setC(toCX,midY,fromCX<toCX?"\u2518":"\u2514","corner"))}for(let y=midY-1;y>toBY;y--)setC(toCX,y,lineV,"line");if(marker.markerAt==="from"){let markerChar=getMarkerShape(marker.type,useAscii,"up"),my=fromTY-1;for(let i=0;i<markerChar.length;i++)setC(fromCX-Math.floor(markerChar.length/2)+i,my,markerChar[i],"arrow")}if(marker.markerAt==="to"){let markerDir=marker.type==="inheritance"||marker.type==="realization"?"down":"up",markerChar=getMarkerShape(marker.type,useAscii,markerDir),my=toBY+1;for(let i=0;i<markerChar.length;i++)setC(toCX-Math.floor(markerChar.length/2)+i,my,markerChar[i],"arrow")}}else{let detourY=Math.max(fromBY,toP.y+toP.height-1)+2;increaseSize(canvas,totalW,detourY+1),increaseRoleCanvasSize(rc,totalW,detourY+1);for(let y=fromBY+1;y<=detourY;y++)setC(fromCX,y,lineV,"line");let lx=Math.min(fromCX,toCX),rx=Math.max(fromCX,toCX);for(let x=lx;x<=rx;x++)setC(x,detourY,lineH,"line");for(let y=detourY-1;y>=toP.y+toP.height;y--)setC(toCX,y,lineV,"line");if(marker.markerAt==="from"){let markerChar=getMarkerShape(marker.type,useAscii,"down"),my=fromBY+1;for(let i=0;i<markerChar.length;i++)setC(fromCX-Math.floor(markerChar.length/2)+i,my,markerChar[i],"arrow")}if(marker.markerAt==="to"){let markerChar=getMarkerShape(marker.type,useAscii,"up"),my=toP.y+toP.height;for(let i=0;i<markerChar.length;i++)setC(toCX-Math.floor(markerChar.length/2)+i,my,markerChar[i],"arrow")}}if(rel.label){let lines2=splitLines(rel.label),maxLabelWidth=Math.max(...lines2.map(l=>l.length))+2,baseMidY,idealMidX;if(fromBY<toTY)baseMidY=Math.floor((fromBY+1+toTY-1)/2),idealMidX=Math.floor((fromCX+toCX)/2);else if(toP.y+toP.height-1<fromP.y){let toBY=toP.y+toP.height-1;baseMidY=Math.floor((toBY+1+fromP.y-1)/2),idealMidX=Math.floor((fromCX+toCX)/2)}else baseMidY=Math.max(fromBY,toP.y+toP.height-1)+2,idealMidX=Math.floor((fromCX+toCX)/2);let labelY=baseMidY,halfHeight=Math.floor(lines2.length/2),labelInBox=!1;for(let i=0;i<lines2.length;i++){let y=labelY-halfHeight+i,idealLabelStart=idealMidX-Math.floor(maxLabelWidth/2),labelStart=Math.max(0,idealLabelStart);for(let x=labelStart;x<labelStart+maxLabelWidth;x++)if(isInsideBox(x,y,excludeIds)){labelInBox=!0;break}if(labelInBox)break}if(labelInBox){let gapTop=fromBY+1,gapBottom=toTY-1;for(let y=gapTop;y<=gapBottom;y++){let clearRow=!0,idealLabelStart=idealMidX-Math.floor(maxLabelWidth/2),labelStart=Math.max(0,idealLabelStart);for(let x=labelStart;x<labelStart+maxLabelWidth;x++)if(isInsideBox(x,y,excludeIds)){clearRow=!1;break}if(clearRow){labelY=y;break}}}let startY=labelY-halfHeight;for(let lineIdx=0;lineIdx<lines2.length;lineIdx++){let paddedLine=` ${lines2[lineIdx]} `,idealLabelStart=idealMidX-Math.floor(paddedLine.length/2),labelStart=Math.max(0,idealLabelStart),y=startY+lineIdx,labelEnd=labelStart+paddedLine.length;labelEnd>0&&y>=0&&(increaseSize(canvas,Math.max(labelEnd,1),Math.max(y+1,1)),increaseRoleCanvasSize(rc,Math.max(labelEnd,1),Math.max(y+1,1)));for(let i=0;i<paddedLine.length;i++){let lx=labelStart+i;lx>=0&&y>=0&&setC(lx,y,paddedLine[i],"text")}}}}return canvasToString(canvas,{roleCanvas:rc,colorMode,theme})}function parseErDiagram(lines){let diagram={entities:[],relationships:[]},entityMap=new Map,currentEntity=null;for(let i=1;i<lines.length;i++){let line=lines[i];if(currentEntity){if(line==="}"){currentEntity=null;continue}let attr=parseAttribute(line);attr&&currentEntity.attributes.push(attr);continue}let entityBlockMatch=line.match(/^(\S+)\s*\{$/);if(entityBlockMatch){let id=entityBlockMatch[1];currentEntity=ensureEntity(entityMap,id);continue}let rel=parseRelationshipLine(line);if(rel){ensureEntity(entityMap,rel.entity1),ensureEntity(entityMap,rel.entity2),diagram.relationships.push(rel);continue}}return diagram.entities=[...entityMap.values()],diagram}function ensureEntity(entityMap,id){let entity=entityMap.get(id);return entity||(entity={id,label:id,attributes:[]},entityMap.set(id,entity)),entity}function parseAttribute(line){let match=line.match(/^(\S+)\s+(\S+)(?:\s+(.+))?$/);if(!match)return null;let type=match[1],name=match[2],rest=match[3]?.trim()??"",keys=[],comment,commentMatch=rest.match(/"([^"]*)"/);commentMatch&&(comment=normalizeBrTags(commentMatch[1]));let restWithoutComment=rest.replace(/"[^"]*"/,"").trim();for(let part of restWithoutComment.split(/\s+/)){let upper=part.toUpperCase();(upper==="PK"||upper==="FK"||upper==="UK")&&keys.push(upper)}return{type,name,keys,comment}}function parseRelationshipLine(line){let match=line.match(/^(\S+)\s+([|o}{]+(?:--|\.\.)[|o}{]+)\s+(\S+)\s*:\s*(.+)$/);if(!match)return null;let entity1=match[1],cardinalityStr=match[2],entity2=match[3],rawLabel=match[4].trim().replace(/^["']|["']$/g,""),label=normalizeBrTags(rawLabel),lineMatch=cardinalityStr.match(/^([|o}{]+)(--|\.\.?)([|o}{]+)$/);if(!lineMatch)return null;let leftStr=lineMatch[1],lineStyle=lineMatch[2],rightStr=lineMatch[3],cardinality1=parseCardinality(leftStr),cardinality2=parseCardinality(rightStr),identifying=lineStyle==="--";return!cardinality1||!cardinality2?null:{entity1,entity2,cardinality1,cardinality2,label,identifying}}function parseCardinality(str){let sorted=str.split("").sort().join("");return sorted==="||"?"one":sorted==="o|"?"zero-one":sorted==="|}"||sorted==="{|"?"many":sorted==="{o"||sorted==="o{"?"zero-many":null}function classifyBoxChar2(ch){return/^[┌┐└┘├┤┬┴┼│─╭╮╰╯+\-|]$/.test(ch)?"border":"text"}function formatAttribute(attr){return`${attr.keys.length>0?attr.keys.join(",")+" ":"   "}${attr.type} ${attr.name}`}function buildEntitySections(entity){let header=splitLines(entity.label),attrs=entity.attributes.map(formatAttribute);return attrs.length===0?[header]:[header,attrs]}function getCrowsFootChars(card,useAscii,isRight=!1){if(useAscii)switch(card){case"one":return"|";case"zero-one":return"o|";case"many":return isRight?"<":">";case"zero-many":return isRight?"o<":">o"}else switch(card){case"one":return"\u2502";case"zero-one":return"\u25CB\u2502";case"many":return isRight?"\u255F":"\u2562";case"zero-many":return isRight?"\u25CB\u255F":"\u2562\u25CB"}}function findConnectedComponents(diagram){let visited=new Set,components=[],neighbors=new Map;for(let ent of diagram.entities)neighbors.set(ent.id,new Set);for(let rel of diagram.relationships)neighbors.get(rel.entity1)?.add(rel.entity2),neighbors.get(rel.entity2)?.add(rel.entity1);function dfs(startId,component){let stack=[startId];for(;stack.length>0;){let nodeId=stack.pop();if(!visited.has(nodeId)){visited.add(nodeId),component.add(nodeId);for(let neighbor of neighbors.get(nodeId)??[])visited.has(neighbor)||stack.push(neighbor)}}}for(let ent of diagram.entities)if(!visited.has(ent.id)){let component=new Set;dfs(ent.id,component),component.size>0&&components.push(component)}return components}function renderErAscii(text,config,colorMode,theme){let lines=text.split(`
9`).map(l=>l.trim()).filter(l=>l.length>0&&!l.startsWith("%%")),diagram=parseErDiagram(lines);if(diagram.entities.length===0)return"";let useAscii=config.useAscii,hGap=6,vGap=4,componentGap=6,entitySections=new Map,entityBoxW=new Map,entityBoxH=new Map,entityById=new Map;for(let ent of diagram.entities){entityById.set(ent.id,ent);let sections=buildEntitySections(ent);entitySections.set(ent.id,sections);let maxTextW=0;for(let section of sections)for(let line of section)maxTextW=Math.max(maxTextW,line.length);let boxW=maxTextW+4,totalLines=0;for(let section of sections)totalLines+=Math.max(section.length,1);let boxH=totalLines+(sections.length-1)+2;entityBoxW.set(ent.id,boxW),entityBoxH.set(ent.id,boxH)}let components=findConnectedComponents(diagram),placed=new Map,currentY=0;for(let component of components){let componentEntities=diagram.entities.filter(e=>component.has(e.id)),maxPerRow=Math.max(2,Math.ceil(Math.sqrt(componentEntities.length))),currentX=0,maxRowH=0,colCount=0,componentStartY=currentY;for(let ent of componentEntities){let w=entityBoxW.get(ent.id),h=entityBoxH.get(ent.id);colCount>=maxPerRow&&(currentY+=maxRowH+vGap,currentX=0,maxRowH=0,colCount=0),placed.set(ent.id,{entity:ent,sections:entitySections.get(ent.id),x:currentX,y:currentY,width:w,height:h}),currentX+=w+hGap,maxRowH=Math.max(maxRowH,h),colCount++}currentY+=maxRowH+componentGap}let totalW=0,totalH=0;for(let p of placed.values())totalW=Math.max(totalW,p.x+p.width),totalH=Math.max(totalH,p.y+p.height);totalW+=4,totalH+=2;let canvas=mkCanvas(totalW-1,totalH-1),rc=mkRoleCanvas(totalW-1,totalH-1);function setC(x,y,ch,role){x>=0&&x<canvas.length&&y>=0&&y<(canvas[0]?.length??0)&&(canvas[x][y]=ch,setRole(rc,x,y,role))}for(let p of placed.values()){let boxCanvas=drawMultiBox(p.sections,useAscii);for(let bx=0;bx<boxCanvas.length;bx++)for(let by=0;by<boxCanvas[0].length;by++){let ch=boxCanvas[bx][by];if(ch!==" "){let cx=p.x+bx,cy=p.y+by;cx<totalW&&cy<totalH&&setC(cx,cy,ch,classifyBoxChar2(ch))}}}let H=useAscii?"-":"\u2500",V=useAscii?"|":"\u2502",dashH=useAscii?".":"\u254C",dashV=useAscii?":":"\u250A";for(let rel of diagram.relationships){let e1=placed.get(rel.entity1),e2=placed.get(rel.entity2);if(!e1||!e2)continue;let lineH=rel.identifying?H:dashH,lineV=rel.identifying?V:dashV,e1CX=e1.x+Math.floor(e1.width/2),e1CY=e1.y+Math.floor(e1.height/2),e2CX=e2.x+Math.floor(e2.width/2),e2CY=e2.y+Math.floor(e2.height/2);if(Math.abs(e1CY-e2CY)<Math.max(e1.height,e2.height)){let[left,right]=e1CX<e2CX?[e1,e2]:[e2,e1],[leftCard,rightCard]=e1CX<e2CX?[rel.cardinality1,rel.cardinality2]:[rel.cardinality2,rel.cardinality1],startX=left.x+left.width,endX=right.x-1,lineY=left.y+Math.floor(left.height/2);for(let x=startX;x<=endX;x++)setC(x,lineY,lineH,"line");let leftChars=getCrowsFootChars(leftCard,useAscii,!1);for(let i=0;i<leftChars.length;i++)setC(startX+i,lineY,leftChars[i],"arrow");let rightChars=getCrowsFootChars(rightCard,useAscii,!0);for(let i=0;i<rightChars.length;i++)setC(endX-rightChars.length+1+i,lineY,rightChars[i],"arrow");if(rel.label){let lines2=splitLines(rel.label),gapMid=Math.floor((startX+endX)/2);for(let lineIdx=0;lineIdx<lines2.length;lineIdx++){let line=lines2[lineIdx],labelStart=Math.max(startX,gapMid-Math.floor(line.length/2)),labelY=lineY+1+lineIdx;increaseSize(canvas,Math.max(labelStart+line.length,1),Math.max(labelY+1,1)),increaseRoleCanvasSize(rc,Math.max(labelStart+line.length,1),Math.max(labelY+1,1));for(let i=0;i<line.length;i++){let lx=labelStart+i;lx>=startX&&lx<=endX&&setC(lx,labelY,line[i],"text")}}}}else{let[upper,lower]=e1CY<e2CY?[e1,e2]:[e2,e1],[upperCard,lowerCard]=e1CY<e2CY?[rel.cardinality1,rel.cardinality2]:[rel.cardinality2,rel.cardinality1],startY=upper.y+upper.height,endY=lower.y-1,lineX=upper.x+Math.floor(upper.width/2);for(let y=startY;y<=endY;y++)setC(lineX,y,lineV,"line");let lowerCX=lower.x+Math.floor(lower.width/2);if(lineX!==lowerCX){let midY=Math.floor((startY+endY)/2),lx=Math.min(lineX,lowerCX),rx=Math.max(lineX,lowerCX);for(let x=lx;x<=rx;x++)setC(x,midY,lineH,"line");for(let y=midY+1;y<=endY;y++)setC(lowerCX,y,lineV,"line")}let upperChars=getCrowsFootChars(upperCard,useAscii,!1);for(let i=0;i<upperChars.length;i++)setC(lineX-Math.floor(upperChars.length/2)+i,startY,upperChars[i],"arrow");let targetX=lineX!==lowerCX?lowerCX:lineX,lowerChars=getCrowsFootChars(lowerCard,useAscii,!0);for(let i=0;i<lowerChars.length;i++)setC(targetX-Math.floor(lowerChars.length/2)+i,endY,lowerChars[i],"arrow");if(rel.label){let lines2=splitLines(rel.label),startLabelY=Math.floor((startY+endY)/2)-Math.floor((lines2.length-1)/2);for(let lineIdx=0;lineIdx<lines2.length;lineIdx++){let line=lines2[lineIdx],labelX=lineX+2,y=startLabelY+lineIdx;if(y>=0)for(let i=0;i<line.length;i++){let lx=labelX+i;lx>=0&&(increaseSize(canvas,lx+1,y+1),increaseRoleCanvasSize(rc,lx+1,y+1),setC(lx,y,line[i],"text"))}}}}}return canvasToString(canvas,{roleCanvas:rc,colorMode,theme})}function parseXYChart(lines){let xAxis={},yAxis={},series=[],title,horizontal=!1;for(let line of lines){if(/^xychart(-beta)?\b/i.test(line)){/\bhorizontal\b/i.test(line)&&(horizontal=!0);continue}let titleMatch=line.match(/^title\s+"([^"]+)"/);if(titleMatch){title=titleMatch[1];continue}let xCatMatch=line.match(/^x-axis\s+(?:"([^"]*)"\s*)?\[([^\]]+)\]/);if(xCatMatch){xCatMatch[1]&&(xAxis.title=xCatMatch[1]),xAxis.categories=xCatMatch[2].split(",").map(s=>s.trim());continue}let xRangeMatch=line.match(/^x-axis\s+(?:"([^"]*)"\s+)?(-?\d+(?:\.\d+)?)\s*-->\s*(-?\d+(?:\.\d+)?)/);if(xRangeMatch){xRangeMatch[1]&&(xAxis.title=xRangeMatch[1]),xAxis.range={min:parseFloat(xRangeMatch[2]),max:parseFloat(xRangeMatch[3])};continue}let yRangeMatch=line.match(/^y-axis\s+(?:"([^"]*)"\s+)?(-?\d+(?:\.\d+)?)\s*-->\s*(-?\d+(?:\.\d+)?)/);if(yRangeMatch){yRangeMatch[1]&&(yAxis.title=yRangeMatch[1]),yAxis.range={min:parseFloat(yRangeMatch[2]),max:parseFloat(yRangeMatch[3])};continue}let yTitleOnly=line.match(/^y-axis\s+"([^"]+)"\s*$/);if(yTitleOnly){yAxis.title=yTitleOnly[1];continue}let barMatch=line.match(/^bar\s+\[([^\]]+)\]/);if(barMatch){series.push({type:"bar",data:parseNumericArray(barMatch[1])});continue}let lineMatch=line.match(/^line\s+\[([^\]]+)\]/);if(lineMatch){series.push({type:"line",data:parseNumericArray(lineMatch[1])});continue}}if(!yAxis.range&&series.length>0){let allValues=series.flatMap(s=>s.data),min=Math.min(...allValues),max=Math.max(...allValues),span=max-min||1;min=min-span*.1,max=max+span*.1,min>0&&min<span*.5&&(min=0),yAxis.range={min,max}}return yAxis.range||(yAxis.range={min:0,max:100}),{title,horizontal,xAxis,yAxis,series}}function parseNumericArray(str){return str.split(",").map(s=>parseFloat(s.trim()))}var CHART_ACCENT_FALLBACK="#3b82f6";function hexToHsl(hex){let h=hex.replace("#",""),ri=parseInt(h.substring(0,2),16)/255,gi=parseInt(h.substring(2,4),16)/255,bi=parseInt(h.substring(4,6),16)/255,max=Math.max(ri,gi,bi),min=Math.min(ri,gi,bi),l=(max+min)/2;if(max===min)return[0,0,l*100];let d=max-min,s=l>.5?d/(2-max-min):d/(max+min),hue;return max===ri?hue=((gi-bi)/d+(gi<bi?6:0))/6:max===gi?hue=((bi-ri)/d+2)/6:hue=((ri-gi)/d+4)/6,[hue*360,s*100,l*100]}function hslToHex(h,s,l){let si=s/100,li=l/100,c=(1-Math.abs(2*li-1))*si,x=c*(1-Math.abs(h/60%2-1)),m=li-c/2,r,g,b;h<60?(r=c,g=x,b=0):h<120?(r=x,g=c,b=0):h<180?(r=0,g=c,b=x):h<240?(r=0,g=x,b=c):h<300?(r=x,g=0,b=c):(r=c,g=0,b=x);let toHex=v=>Math.round((v+m)*255).toString(16).padStart(2,"0");return`#${toHex(r)}${toHex(g)}${toHex(b)}`}function isValidHex(color){return/^#[0-9a-fA-F]{6}$/.test(color)}function isDarkBackground(bgHex){return hexToHsl(bgHex)[2]<50}function getSeriesColor(index,accentColor,bgColor){if(index===0)return accentColor;let safeAccent=isValidHex(accentColor)?accentColor:CHART_ACCENT_FALLBACK,safeBg=bgColor&&isValidHex(bgColor)?bgColor:void 0,[h,s]=hexToHsl(safeAccent),chartS=Math.max(55,Math.min(85,s)),tier=Math.ceil(index/2),oddIndex=index%2===1,dark=safeBg&&isDarkBackground(safeBg)?!oddIndex:oddIndex,l=dark?Math.max(25,48-tier*13):Math.min(78,55+tier*11),hShift=(dark?-8:12)*tier,newH=((h+hShift)%360+360)%360;return hslToHex(newH,chartS,l)}var PLOT_WIDTH=60,PLOT_HEIGHT=20,UNI={hLine:"\u2500",vLine:"\u2502",origin:"\u253C",yTick:"\u2524",xTick:"\u252C",bar:"\u2588",grid:"\xB7",cornerTL:"\u256D",cornerTR:"\u256E",cornerBL:"\u2570",cornerBR:"\u256F"},ASC={hLine:"-",vLine:"|",origin:"+",yTick:"+",xTick:"+",bar:"#",grid:".",cornerTL:"+",cornerTR:"+",cornerBL:"+",cornerBR:"+"};function getSeriesColors(total,theme){let accent=theme.accent??CHART_ACCENT_FALLBACK;return total<=1?[accent]:Array.from({length:total},(_,i)=>getSeriesColor(i,accent,theme.bg))}function roleToHex(role,theme){switch(role){case"text":return theme.fg;case"border":return theme.border;case"line":return theme.line;case"arrow":return theme.arrow;case"corner":return theme.corner??theme.line;case"junction":return theme.junction??theme.border;default:return theme.fg}}function renderXYChartAscii(text,config,colorMode,theme){let lines=text.split(`
10`).map(l=>l.trim()).filter(l=>l.length>0&&!l.startsWith("%%")),chart=parseXYChart(lines),ch=config.useAscii?ASC:UNI;return chart.horizontal?renderHorizontal(chart,ch,colorMode,theme):renderVertical(chart,ch,colorMode,theme)}function renderVertical(chart,ch,colorMode,theme){let dataCount=getDataCount(chart);if(dataCount===0)return"";let yRange=chart.yAxis.range,yTicks=niceTickValues(yRange.min,yRange.max),yLabels=yTicks.map(v=>formatTickValue(v)),yGutter=Math.max(...yLabels.map(l=>l.length))+1,plotW=Math.max(PLOT_WIDTH,dataCount*6),plotH=PLOT_HEIGHT,bandW=Math.floor(plotW/dataCount),catLabels=getCategoryLabels(chart,dataCount),hasTitle=!!chart.title,hasXTitle=!!chart.xAxis.title,hasLegend=chart.series.length>1,titleRow=hasTitle?0:-1,plotTop=(hasTitle?2:0)+(hasLegend?1:0),plotLeft=yGutter+1,totalW=plotLeft+bandW*dataCount+2,xAxisRow=plotTop+plotH,xLabelRow=xAxisRow+1,xTitleRow=hasXTitle?xLabelRow+1:-1,totalH=xLabelRow+1+(hasXTitle?1:0)+0,canvas=createCanvas(totalW,totalH),roles=createRoleCanvas(totalW,totalH),hexColors=createHexCanvas(totalW,totalH),seriesColors=getSeriesColors(chart.series.length,theme),valueToRow=v=>{let t=(v-yRange.min)/(yRange.max-yRange.min||1);return Math.round(t*(plotH-1))},bandCenter=i=>plotLeft+Math.floor(bandW*(i+.5));hasTitle&&titleRow>=0&&writeText(canvas,roles,titleRow,Math.floor(totalW/2-chart.title.length/2),chart.title,"text"),hasLegend&&drawLegend(canvas,roles,hexColors,chart,hasTitle?1:0,totalW,ch,seriesColors);for(let row=0;row<plotH;row++){let displayRow=plotTop+(plotH-1-row);set(canvas,roles,displayRow,plotLeft-1,ch.vLine,"border")}set(canvas,roles,xAxisRow,plotLeft-1,ch.origin,"border");for(let tick of yTicks){let row=valueToRow(tick);if(row<0||row>=plotH)continue;let displayRow=plotTop+(plotH-1-row),label=formatTickValue(tick);set(canvas,roles,displayRow,plotLeft-1,row===0?ch.origin:ch.yTick,"border");let labelStart=yGutter-label.length;writeText(canvas,roles,displayRow,Math.max(0,labelStart),label,"text")}for(let c=plotLeft;c<plotLeft+bandW*dataCount;c++)set(canvas,roles,xAxisRow,c,ch.hLine,"border");for(let i=0;i<dataCount;i++){let cx=bandCenter(i);set(canvas,roles,xAxisRow,cx,ch.xTick,"border");let label=catLabels[i],labelStart=cx-Math.floor(label.length/2);writeText(canvas,roles,xLabelRow,Math.max(0,labelStart),label,"text")}if(hasXTitle&&xTitleRow>=0){let title=chart.xAxis.title;writeText(canvas,roles,xTitleRow,Math.floor(totalW/2-title.length/2),title,"text")}for(let tick of yTicks){let row=valueToRow(tick);if(row<0||row>=plotH)continue;let displayRow=plotTop+(plotH-1-row);for(let c=plotLeft;c<plotLeft+bandW*dataCount;c++)get(canvas,displayRow,c)===" "&&set(canvas,roles,displayRow,c,ch.grid,"line")}let barEntries=[];for(let si=0;si<chart.series.length;si++)chart.series[si].type==="bar"&&barEntries.push({data:chart.series[si].data,globalIdx:si});if(barEntries.length>0){let barCount=barEntries.length,usable=Math.max(1,bandW-2),singleBarW=Math.max(1,Math.min(Math.floor(usable/barCount),8)),groupW=singleBarW*barCount+(barCount-1),baseRow=valueToRow(Math.max(0,yRange.min));for(let bIdx=0;bIdx<barEntries.length;bIdx++){let entry=barEntries[bIdx],hexColor=seriesColors[entry.globalIdx];for(let i=0;i<entry.data.length;i++){let bx=bandCenter(i)-Math.floor(groupW/2)+bIdx*(singleBarW+1),valRow=valueToRow(entry.data[i]),fromRow=Math.min(baseRow,valRow),toRow=Math.max(baseRow,valRow);for(let row=fromRow;row<=toRow;row++){let displayRow=plotTop+(plotH-1-row);for(let c=bx;c<bx+singleBarW;c++)set(canvas,roles,displayRow,c,ch.bar,"arrow",hexColors,hexColor)}}}}let lineEntries=[];for(let si=0;si<chart.series.length;si++)chart.series[si].type==="line"&&lineEntries.push({data:chart.series[si].data,globalIdx:si});for(let entry of lineEntries){if(entry.data.length===0)continue;let hexColor=seriesColors[entry.globalIdx];drawStaircaseLine(canvas,roles,entry.data,bandCenter,valueToRow,plotTop,plotH,plotLeft,bandW*dataCount,ch,hexColors,hexColor)}return canvasToString2(canvas,roles,hexColors,colorMode,theme)}function renderHorizontal(chart,ch,colorMode,theme){let dataCount=getDataCount(chart);if(dataCount===0)return"";let yRange=chart.yAxis.range,valueTicks=niceTickValues(yRange.min,yRange.max),catLabels=getCategoryLabels(chart,dataCount),catGutter=Math.max(...catLabels.map(l=>l.length))+1,plotW=Math.max(PLOT_WIDTH,40),bandH=Math.max(2,Math.floor(PLOT_HEIGHT/dataCount)),plotH=bandH*dataCount,hasTitle=!!chart.title,hasYTitle=!!chart.yAxis.title,hasLegend=chart.series.length>1,plotTop=(hasTitle?2:0)+(hasLegend?1:0),plotLeft=catGutter+1,totalW=plotLeft+plotW+2,totalH=plotTop+plotH+2+(hasYTitle?1:0),xAxisRow=plotTop+plotH,canvas=createCanvas(totalW,totalH),roles=createRoleCanvas(totalW,totalH),hexColors=createHexCanvas(totalW,totalH),seriesColors=getSeriesColors(chart.series.length,theme),valueToCol=v=>{let t=(v-yRange.min)/(yRange.max-yRange.min||1);return plotLeft+Math.round(t*(plotW-1))},bandMid=i=>plotTop+Math.floor(bandH*(i+.5));hasTitle&&writeText(canvas,roles,0,Math.floor(totalW/2-chart.title.length/2),chart.title,"text"),hasLegend&&drawLegend(canvas,roles,hexColors,chart,hasTitle?1:0,totalW,ch,seriesColors);for(let r=plotTop;r<plotTop+plotH;r++)set(canvas,roles,r,plotLeft-1,ch.vLine,"border");set(canvas,roles,xAxisRow,plotLeft-1,ch.origin,"border");for(let i=0;i<dataCount;i++){let my=bandMid(i),label=catLabels[i],labelStart=catGutter-label.length;writeText(canvas,roles,my,Math.max(0,labelStart),label,"text")}for(let c=plotLeft;c<plotLeft+plotW;c++)set(canvas,roles,xAxisRow,c,ch.hLine,"border");for(let tick of valueTicks){let cx=valueToCol(tick);if(cx<plotLeft||cx>=plotLeft+plotW)continue;set(canvas,roles,xAxisRow,cx,ch.xTick,"border");let label=formatTickValue(tick);writeText(canvas,roles,xAxisRow+1,cx-Math.floor(label.length/2),label,"text")}if(hasYTitle){let title=chart.yAxis.title;writeText(canvas,roles,totalH-1,Math.floor(totalW/2-title.length/2),title,"text")}for(let tick of valueTicks){let cx=valueToCol(tick);if(!(cx<plotLeft||cx>=plotLeft+plotW))for(let r=plotTop;r<plotTop+plotH;r++)get(canvas,r,cx)===" "&&set(canvas,roles,r,cx,ch.grid,"line")}let barEntries=[];for(let si=0;si<chart.series.length;si++)chart.series[si].type==="bar"&&barEntries.push({data:chart.series[si].data,globalIdx:si});if(barEntries.length>0){let barCount=barEntries.length,singleBarH=1,groupH=singleBarH*barCount+(barCount-1),baseCol=valueToCol(Math.max(0,yRange.min));for(let bIdx=0;bIdx<barEntries.length;bIdx++){let entry=barEntries[bIdx],hexColor=seriesColors[entry.globalIdx];for(let i=0;i<entry.data.length;i++){let by=bandMid(i)-Math.floor(groupH/2)+bIdx*(singleBarH+1),valCol=valueToCol(entry.data[i]),fromCol=Math.min(baseCol,valCol),toCol=Math.max(baseCol,valCol);for(let r=by;r<by+singleBarH;r++)for(let c=fromCol;c<=toCol;c++)set(canvas,roles,r,c,ch.bar,"arrow",hexColors,hexColor)}}}let lineEntries=[];for(let si=0;si<chart.series.length;si++)chart.series[si].type==="line"&&lineEntries.push({data:chart.series[si].data,globalIdx:si});for(let entry of lineEntries){if(entry.data.length===0)continue;let hexColor=seriesColors[entry.globalIdx];drawHorizontalStaircaseLine(canvas,roles,entry.data,bandMid,valueToCol,plotTop,plotH,plotLeft,plotW,ch,hexColors,hexColor)}return canvasToString2(canvas,roles,hexColors,colorMode,theme)}function drawStaircaseLine(canvas,roles,data,bandCenter,valueToRow,plotTop,plotH,plotLeft,plotTotalW,ch,hexCanvas,hexColor){if(data.length===0)return;let points=data.map((v,i)=>({col:bandCenter(i),row:valueToRow(v)})),drawAt=(col,row,char)=>{let displayRow=plotTop+(plotH-1-row);displayRow>=0&&col>=plotLeft&&col<plotLeft+plotTotalW&&set(canvas,roles,displayRow,col,char,"arrow",hexCanvas,hexColor)};if(points.length===1){drawAt(points[0].col,points[0].row,ch.hLine);return}for(let i=0;i<points.length-1;i++){let p1=points[i],p2=points[i+1];if(p1.row===p2.row){for(let c=p1.col;c<=p2.col;c++)drawAt(c,p1.row,ch.hLine);continue}let midCol=Math.round((p1.col+p2.col)/2),goingUp=p2.row>p1.row;for(let c=p1.col;c<midCol;c++)drawAt(c,p1.row,ch.hLine);goingUp?drawAt(midCol,p1.row,ch.cornerBR):drawAt(midCol,p1.row,ch.cornerTR);let minRow=Math.min(p1.row,p2.row),maxRow=Math.max(p1.row,p2.row);for(let row=minRow+1;row<maxRow;row++)drawAt(midCol,row,ch.vLine);goingUp?drawAt(midCol,p2.row,ch.cornerTL):drawAt(midCol,p2.row,ch.cornerBL);for(let c=midCol+1;c<=p2.col;c++)drawAt(c,p2.row,ch.hLine);if(i===0){let leadStart=Math.max(plotLeft,p1.col-Math.floor((p2.col-p1.col)/4));for(let c=leadStart;c<p1.col;c++)drawAt(c,p1.row,ch.hLine)}if(i===points.length-2){let trailEnd=Math.min(plotLeft+plotTotalW-1,p2.col+Math.floor((p2.col-p1.col)/4));for(let c=p2.col+1;c<=trailEnd;c++)drawAt(c,p2.row,ch.hLine)}}}function drawHorizontalStaircaseLine(canvas,roles,data,bandMid,valueToCol,plotTop,plotH,plotLeft,plotW,ch,hexCanvas,hexColor){if(data.length===0)return;let points=data.map((v,i)=>({row:bandMid(i),col:valueToCol(v)})),drawAt=(row,col,char)=>{row>=plotTop&&row<plotTop+plotH&&col>=plotLeft&&col<plotLeft+plotW&&set(canvas,roles,row,col,char,"arrow",hexCanvas,hexColor)};if(points.length===1){drawAt(points[0].row,points[0].col,ch.vLine);return}for(let i=0;i<points.length-1;i++){let p1=points[i],p2=points[i+1];if(p1.col===p2.col){for(let r=p1.row;r<=p2.row;r++)drawAt(r,p1.col,ch.vLine);continue}let midRow=Math.round((p1.row+p2.row)/2),goingRight=p2.col>p1.col;for(let r=p1.row;r<midRow;r++)drawAt(r,p1.col,ch.vLine);goingRight?drawAt(midRow,p1.col,ch.cornerBL):drawAt(midRow,p1.col,ch.cornerBR);let minCol=Math.min(p1.col,p2.col),maxCol=Math.max(p1.col,p2.col);for(let c=minCol+1;c<maxCol;c++)drawAt(midRow,c,ch.hLine);goingRight?drawAt(midRow,p2.col,ch.cornerTR):drawAt(midRow,p2.col,ch.cornerTL);for(let r=midRow+1;r<=p2.row;r++)drawAt(r,p2.col,ch.vLine)}}function drawLegend(canvas,roles,hexCanvas,chart,row,totalW,ch,seriesColors){let items=[],barIdx=0,lineIdx=0;for(let si=0;si<chart.series.length;si++)chart.series[si].type==="bar"?(items.push({symbol:ch.bar,label:`Bar ${barIdx+1}`,globalIdx:si}),barIdx++):(items.push({symbol:ch.hLine,label:`Line ${lineIdx+1}`,globalIdx:si}),lineIdx++);let totalLen=0;for(let i=0;i<items.length;i++)i>0&&(totalLen+=2),totalLen+=2+items[i].label.length;let col=Math.max(0,Math.floor(totalW/2-totalLen/2));for(let i=0;i<items.length;i++){i>0&&(col+=2);let item=items[i];set(canvas,roles,row,col,item.symbol,"arrow",hexCanvas,seriesColors[item.globalIdx]),col+=1,col+=1,writeText(canvas,roles,row,col,item.label,"text"),col+=item.label.length}}function createCanvas(width,height){return Array.from({length:width},()=>Array.from({length:height},()=>" "))}function createRoleCanvas(width,height){return Array.from({length:width},()=>Array.from({length:height}).fill(null))}function createHexCanvas(width,height){return Array.from({length:width},()=>Array.from({length:height}).fill(null))}function set(canvas,roles,row,col,char,role,hexCanvas,hex){col>=0&&col<canvas.length&&row>=0&&row<canvas[0].length&&(canvas[col][row]=char,roles[col][row]=role,hexCanvas&&hex&&(hexCanvas[col][row]=hex))}function get(canvas,row,col){return col>=0&&col<canvas.length&&row>=0&&row<canvas[0].length?canvas[col][row]:" "}function writeText(canvas,roles,row,startCol,text,role){for(let i=0;i<text.length;i++)set(canvas,roles,row,startCol+i,text[i],role)}function canvasToString2(canvas,roles,hexCanvas,colorMode,theme){if(canvas.length===0)return"";let height=canvas[0].length,width=canvas.length,lines=[];for(let row=0;row<height;row++){let chars=[],rowRoles=[],rowHex=[];for(let col=0;col<width;col++)chars.push(canvas[col][row]),rowRoles.push(roles[col][row]),rowHex.push(hexCanvas[col][row]);let end=chars.length-1;for(;end>=0&&chars[end]===" ";)end--;end<0?lines.push(""):lines.push(colorizeRow(chars.slice(0,end+1),rowRoles.slice(0,end+1),rowHex.slice(0,end+1),theme,colorMode))}for(;lines.length>0&&lines[lines.length-1]==="";)lines.pop();return lines.join(`
11`)}function colorizeRow(chars,roles,hexOverrides,theme,mode){if(mode==="none")return chars.join("");let result="",currentColor=null,buffer="";for(let i=0;i<chars.length;i++){let char=chars[i];if(char===" "){buffer.length>0&&(result+=currentColor?colorizeText(buffer,currentColor,mode):buffer,buffer="",currentColor=null),result+=" ";continue}let hexOvr=hexOverrides[i]??null,roleVal=roles[i]??null,color=hexOvr??(roleVal?roleToHex(roleVal,theme):null);color===currentColor?buffer+=char:(buffer.length>0&&(result+=currentColor?colorizeText(buffer,currentColor,mode):buffer),buffer=char,currentColor=color)}return buffer.length>0&&(result+=currentColor?colorizeText(buffer,currentColor,mode):buffer),result}function getDataCount(chart){if(chart.xAxis.categories)return chart.xAxis.categories.length;for(let s of chart.series)if(s.data.length>0)return s.data.length;return 0}function getCategoryLabels(chart,count){if(chart.xAxis.categories)return chart.xAxis.categories;if(chart.xAxis.range){let{min,max}=chart.xAxis.range,step=count>1?(max-min)/(count-1):0;return Array.from({length:count},(_,i)=>formatTickValue(min+step*i))}return Array.from({length:count},(_,i)=>String(i+1))}function niceTickValues(min,max){let range=max-min;if(range<=0)return[min];let rawInterval=range/6,magnitude=Math.pow(10,Math.floor(Math.log10(rawInterval))),residual=rawInterval/magnitude,niceInterval;residual<=1.5?niceInterval=magnitude:residual<=3?niceInterval=2*magnitude:residual<=7?niceInterval=5*magnitude:niceInterval=10*magnitude;let start=Math.ceil(min/niceInterval)*niceInterval,ticks=[];for(let v=start;v<=max+niceInterval*.001;v+=niceInterval)ticks.push(Math.round(v*1e10)/1e10);return ticks}function formatTickValue(v){return Number.isInteger(v)?String(v):v.toFixed(Math.abs(v)<10?1:0)}var setChartSize=(width,height)=>{PLOT_WIDTH=width,PLOT_HEIGHT=height};function detectDiagramType(text){let firstLine=text.trim().split(`
12`)[0]?.trim().toLowerCase()??"";return/^xychart(-beta)?\b/.test(firstLine)?"xychart":/^sequencediagram\s*$/.test(firstLine)?"sequence":/^classdiagram\s*$/.test(firstLine)?"class":/^erdiagram\s*$/.test(firstLine)?"er":"flowchart"}function renderMermaidASCII(text,options={}){let config={useAscii:options.useAscii??!1,paddingX:options.paddingX??5,paddingY:options.paddingY??5,boxBorderPadding:options.boxBorderPadding??1,graphDirection:"TD"},colorMode=options.colorMode==="auto"||options.colorMode===void 0?detectColorMode():options.colorMode,theme={...DEFAULT_ASCII_THEME,...options.theme};switch(detectDiagramType(text)){case"xychart":return renderXYChartAscii(text,config,colorMode,theme);case"sequence":return renderSequenceAscii(text,config,colorMode,theme);case"class":return renderClassAscii(text,config,colorMode,theme);case"er":return renderErAscii(text,config,colorMode,theme);default:{let parsed=parseMermaid(text);parsed.direction==="LR"||parsed.direction==="RL"?config.graphDirection="LR":config.graphDirection="TD";let graph=convertToAsciiGraph(parsed,config);return createMapping(graph),drawGraph(graph),parsed.direction==="BT"&&(flipCanvasVertically(graph.canvas),flipRoleCanvasVertically(graph.roleCanvas)),canvasToString(graph.canvas,{roleCanvas:graph.roleCanvas,colorMode,theme})}}}var renderMermaidAscii=renderMermaidASCII;export{renderMermaidAscii,setChartSize};
13

1/**
2 * One diagram the pane can show: its mermaid source and a short title.
3 * `zoom` maps a node id to the diagram one level inside that node, as a C4
4 * container opens into its components. `kind: 'tree'` is a problem map: an
5 * indented text tree in `source`, drawn as is.
6 */
7export type Diagram = { id: string; title: string; source: string; zoom?: Record<string, Diagram>; kind?: 'tree' }
8
9declare module 'claude-code' {
10  interface PluginState {
11    'mermaid-c4-zoom': {
12      list: Diagram[]
13      shown: number
14      /** Node ids zoomed into, from the shown top diagram down. */
15      path: string[]
16      /** A fork of the agent is writing a problem map. */
17      isMapping: boolean
18      /** The session's transcript file, where prompt times are read from. */
19      transcriptPath: string
20    }
21  }
22}
23