| 1 | package cli |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "strings" |
| 6 | "unicode" |
| 7 | |
| 8 | "github.com/charmbracelet/x/ansi" |
| 9 | "github.com/yuin/goldmark" |
| 10 | "github.com/yuin/goldmark/ast" |
| 11 | "github.com/yuin/goldmark/extension" |
| 12 | extast "github.com/yuin/goldmark/extension/ast" |
| 13 | "github.com/yuin/goldmark/parser" |
| 14 | "github.com/yuin/goldmark/text" |
| 15 | "github.com/yuin/goldmark/util" |
| 16 | ) |
| 17 | |
| 18 | // mdRenderer turns the model's markdown answer into ANSI-styled terminal text |
| 19 | // using the brand palette. It implements only the constructs a chat-style |
| 20 | // model reliably emits — headings, paragraphs, lists, fenced code, blockquotes, |
| 21 | // strong/em/code-spans, links, thematic breaks — and degrades to plain text |
| 22 | // for anything else. Word-wrapping respects CJK widths and skips over ANSI |
| 23 | // SGR codes when counting columns. |
| 24 | type mdRenderer struct { |
| 25 | md goldmark.Markdown |
| 26 | width int |
| 27 | copyMode bool |
| 28 | copySpanPrefix string |
| 29 | nextCopySpanID int |
| 30 | } |
| 31 | |
| 32 | func newMarkdownRenderer(width int) *mdRenderer { |
| 33 | if width <= 0 { |
| 34 | width = 80 |
| 35 | } |
| 36 | // Enable the GFM table extension so | header | rows | get parsed into |
| 37 | // a Table node rather than falling through as a literal text block. |
| 38 | return &mdRenderer{ |
| 39 | md: goldmark.New( |
| 40 | goldmark.WithExtensions(extension.Table), |
| 41 | goldmark.WithParserOptions( |
| 42 | parser.WithInlineParsers(util.Prioritized(&mathParser{}, 150)), |
| 43 | ), |
| 44 | ), |
| 45 | width: width, |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | func italic(s string) string { |
| 50 | if !colorOn() { |
| 51 | return s |
| 52 | } |
| 53 | return "\033[3m" + s + "\033[0m" |
| 54 | } |
| 55 | |
| 56 | // Render parses input as markdown and returns ANSI-styled output with a |
| 57 | // trailing newline. Empty input returns an empty string so callers can |
| 58 | // reliably distinguish "nothing to draw" from "draw a blank line". |
| 59 | func (r *mdRenderer) Render(input string) string { |
| 60 | if strings.TrimSpace(input) == "" { |
| 61 | return "" |
| 62 | } |
| 63 | input = fixCJKEmphasis(normalizeMath(input)) |
| 64 | src := []byte(input) |
| 65 | doc := r.md.Parser().Parse(text.NewReader(src)) |
| 66 | var buf strings.Builder |
| 67 | r.renderBlocks(&buf, doc, src, 0) |
| 68 | out := strings.TrimRight(buf.String(), "\n") |
| 69 | if out == "" { |
| 70 | return "" |
| 71 | } |
| 72 | return out + "\n" |
| 73 | } |
| 74 | |
| 75 | // RenderCopy mirrors Render's visible output while surrounding math spans with |
| 76 | // zero-width internal markers. The markers are consumed only when the user |
| 77 | // copies a transcript selection, so display wrapping and selection coordinates |
| 78 | // stay identical without maintaining a second raw transcript. |
| 79 | func (r *mdRenderer) RenderCopy(input, prefix string) string { |
| 80 | if strings.TrimSpace(input) == "" { |
| 81 | return "" |
| 82 | } |
| 83 | input = fixCJKEmphasis(normalizeMath(input)) |
| 84 | src := []byte(input) |
| 85 | doc := r.md.Parser().Parse(text.NewReader(src)) |
| 86 | var buf strings.Builder |
| 87 | r.copyMode = true |
| 88 | r.copySpanPrefix = prefix |
| 89 | r.nextCopySpanID = 0 |
| 90 | r.renderBlocks(&buf, doc, src, 0) |
| 91 | r.copyMode = false |
| 92 | out := strings.TrimRight(buf.String(), "\n") |
| 93 | if out == "" { |
| 94 | return "" |
| 95 | } |
| 96 | return out + "\n" |
| 97 | } |
| 98 | |
| 99 | // fixCJKEmphasis works around goldmark's CommonMark parser not recognising |
| 100 | // CJK punctuation as Unicode punctuation: a closing ** is only right-flanking |
| 101 | // when the char before it is punctuation, so **X，**Y (， = U+FF0C) is not bold. |
| 102 | // Inserting a space after such a closer fixes the flanking. The space must go |
| 103 | // only on a *closer* — putting it after an opener (，**X** → ，** X**) would |
| 104 | // instead break the left-flanking — so emphasis open/close is tracked by a |
| 105 | // running toggle. Inline code spans and fenced blocks are passed through so |
| 106 | // literal ** inside code is never touched. |
| 107 | func fixCJKEmphasis(s string) string { |
| 108 | runes := []rune(s) |
| 109 | n := len(runes) |
| 110 | var b strings.Builder |
| 111 | b.Grow(len(s) + 16) |
| 112 | |
| 113 | inFenced := false // inside ``` fenced code block |
| 114 | inCode := false // inside ` inline code span |
| 115 | inEmphasis := false // between an opening ** and its closer |
| 116 | |
| 117 | for i := 0; i < n; i++ { |
| 118 | r := runes[i] |
| 119 | |
| 120 | // Fenced code block: ``` toggles in/out. |
| 121 | if r == '`' && i+2 < n && runes[i+1] == '`' && runes[i+2] == '`' { |
| 122 | inFenced = !inFenced |
| 123 | b.WriteString("```") |
| 124 | i += 2 |
| 125 | continue |
| 126 | } |
| 127 | // Inline code span: ` toggles in/out (but not inside fenced blocks). |
| 128 | if r == '`' && !inFenced { |
| 129 | inCode = !inCode |
| 130 | b.WriteRune(r) |
| 131 | continue |
| 132 | } |
| 133 | // Inside code — pass through verbatim. |
| 134 | if inCode || inFenced { |
| 135 | b.WriteRune(r) |
| 136 | continue |
| 137 | } |
| 138 | // Emphasis cannot span a hard line break; reset so an unclosed ** on a |
| 139 | // previous line can't make the next line's opener look like a closer. |
| 140 | if r == '\n' { |
| 141 | inEmphasis = false |
| 142 | b.WriteRune(r) |
| 143 | continue |
| 144 | } |
| 145 | |
| 146 | if r == '*' && i+1 < n && runes[i+1] == '*' { |
| 147 | b.WriteString("**") |
| 148 | i++ |
| 149 | inEmphasis = !inEmphasis |
| 150 | |
| 151 | // Only a closer (emphasis just ended) hugging CJK punctuation needs |
| 152 | // the trailing space; the same space after an opener would break it. |
| 153 | if !inEmphasis && i >= 2 && !isSpace(runes[i-2]) && isCJKPunct(runes[i-2]) { |
| 154 | b.WriteByte(' ') |
| 155 | } |
| 156 | continue |
| 157 | } |
| 158 | |
| 159 | b.WriteRune(r) |
| 160 | } |
| 161 | return b.String() |
| 162 | } |
| 163 | |
| 164 | // isCJKPunct reports whether r is a CJK full-width punctuation character. |
| 165 | // These are not classified as Unicode punctuation by the CommonMark spec, |
| 166 | // which breaks the "right-flanking delimiter run" check for emphasis. |
| 167 | func isCJKPunct(r rune) bool { |
| 168 | if r <= 0x7F { |
| 169 | return false // ASCII punctuation is handled correctly by CommonMark |
| 170 | } |
| 171 | // Fast path: common CJK punctuation ranges. |
| 172 | switch { |
| 173 | case r >= 0x3000 && r <= 0x303F: // CJK Symbols and Punctuation (。、etc.) |
| 174 | return true |
| 175 | case r >= 0xFF01 && r <= 0xFF0F: // Fullwidth Forms I (! " # $ etc.) |
| 176 | return true |
| 177 | case r >= 0xFF1A && r <= 0xFF20: // Fullwidth Forms II (: ; < = etc.) |
| 178 | return true |
| 179 | case r >= 0xFF3B && r <= 0xFF3F: // Fullwidth Forms III ([ \ ] ^ _) |
| 180 | return true |
| 181 | case r >= 0xFF5B && r <= 0xFF65: // Fullwidth Forms IV ({ | } ~ etc.) |
| 182 | return true |
| 183 | } |
| 184 | // Fallback: any non-ASCII punctuation (e.g. Tibetan, Armenian). |
| 185 | return unicode.IsPunct(r) |
| 186 | } |
| 187 | |
| 188 | // isSpace reports whether r is a whitespace character. |
| 189 | func isSpace(r rune) bool { |
| 190 | return r == ' ' || r == '\t' || r == '\n' || r == '\r' |
| 191 | } |
| 192 | |
| 193 | func (r *mdRenderer) renderBlocks(buf *strings.Builder, parent ast.Node, src []byte, indent int) { |
| 194 | for c := parent.FirstChild(); c != nil; c = c.NextSibling() { |
| 195 | r.renderBlock(buf, c, src, indent) |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | func (r *mdRenderer) renderBlock(buf *strings.Builder, node ast.Node, src []byte, indent int) { |
| 200 | switch n := node.(type) { |
| 201 | case *ast.Heading: |
| 202 | r.renderHeading(buf, n, src, indent) |
| 203 | case *ast.Paragraph: |
| 204 | r.renderParagraph(buf, n, src, indent) |
| 205 | case *ast.TextBlock: |
| 206 | // TextBlock is goldmark's container for tight-list-item inline content |
| 207 | // (no trailing blank). Treat it like a paragraph but skip the spacer. |
| 208 | r.renderTextBlock(buf, n, src, indent) |
| 209 | case *ast.List: |
| 210 | r.renderList(buf, n, src, indent) |
| 211 | case *ast.FencedCodeBlock, *ast.CodeBlock: |
| 212 | r.renderFenced(buf, n, src, indent) |
| 213 | case *ast.Blockquote: |
| 214 | r.renderBlockquote(buf, n, src, indent) |
| 215 | case *extast.Table: |
| 216 | r.renderTable(buf, n, src, indent) |
| 217 | case *ast.ThematicBreak: |
| 218 | w := max(r.width-indent, 8) |
| 219 | buf.WriteString(strings.Repeat(" ", indent)) |
| 220 | buf.WriteString(dim(strings.Repeat("─", w))) |
| 221 | buf.WriteString("\n\n") |
| 222 | default: |
| 223 | // Unknown block: drop into children rather than dropping content. |
| 224 | r.renderBlocks(buf, node, src, indent) |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | func (r *mdRenderer) renderHeading(buf *strings.Builder, n *ast.Heading, src []byte, indent int) { |
| 229 | inline := r.collectInline(n, src) |
| 230 | buf.WriteString(strings.Repeat(" ", indent)) |
| 231 | buf.WriteString(bold(accent(inline))) |
| 232 | buf.WriteString("\n") |
| 233 | // Level-1 headings get an accent underline; deeper levels rely on |
| 234 | // bold+colour alone so the hierarchy reads at a glance without piling |
| 235 | // on visual weight on every "###" in a long response. |
| 236 | if n.Level == 1 { |
| 237 | buf.WriteString(strings.Repeat(" ", indent)) |
| 238 | buf.WriteString(accent(strings.Repeat("─", visibleWidth(inline)))) |
| 239 | buf.WriteString("\n") |
| 240 | } |
| 241 | buf.WriteString("\n") |
| 242 | } |
| 243 | |
| 244 | func (r *mdRenderer) renderParagraph(buf *strings.Builder, n *ast.Paragraph, src []byte, indent int) { |
| 245 | r.renderInlineBlock(buf, n, src, indent, true) |
| 246 | } |
| 247 | |
| 248 | func (r *mdRenderer) renderTextBlock(buf *strings.Builder, n *ast.TextBlock, src []byte, indent int) { |
| 249 | r.renderInlineBlock(buf, n, src, indent, false) |
| 250 | } |
| 251 | |
| 252 | func (r *mdRenderer) renderInlineBlock(buf *strings.Builder, n ast.Node, src []byte, indent int, trailingBlank bool) { |
| 253 | inline := r.collectInline(n, src) |
| 254 | prefix := strings.Repeat(" ", indent) |
| 255 | wrapped := wrapAnsi(inline, r.width-indent) |
| 256 | for line := range strings.SplitSeq(wrapped, "\n") { |
| 257 | buf.WriteString(prefix) |
| 258 | buf.WriteString(line) |
| 259 | buf.WriteString("\n") |
| 260 | } |
| 261 | if trailingBlank { |
| 262 | buf.WriteString("\n") |
| 263 | } |
| 264 | } |
| 265 | |
| 266 | func (r *mdRenderer) renderList(buf *strings.Builder, n *ast.List, src []byte, indent int) { |
| 267 | idx := 1 |
| 268 | for c := n.FirstChild(); c != nil; c = c.NextSibling() { |
| 269 | item, ok := c.(*ast.ListItem) |
| 270 | if !ok { |
| 271 | continue |
| 272 | } |
| 273 | var marker string |
| 274 | if n.IsOrdered() { |
| 275 | marker = fmt.Sprintf("%d.", idx) |
| 276 | idx++ |
| 277 | } else { |
| 278 | marker = "•" |
| 279 | } |
| 280 | buf.WriteString(strings.Repeat(" ", indent)) |
| 281 | buf.WriteString(accent(marker) + " ") |
| 282 | markerW := visibleWidth(marker) + 1 |
| 283 | |
| 284 | first := item.FirstChild() |
| 285 | // goldmark uses TextBlock for tight list items, Paragraph for loose |
| 286 | // ones; treat both as the marker-line carrier so the inline content |
| 287 | // lands next to the bullet either way. |
| 288 | inlineHost := inlineCarrier(first) |
| 289 | if inlineHost != nil { |
| 290 | inline := r.collectInline(inlineHost, src) |
| 291 | wrapped := wrapAnsi(inline, r.width-indent-markerW) |
| 292 | lines := strings.Split(wrapped, "\n") |
| 293 | buf.WriteString(lines[0] + "\n") |
| 294 | for _, l := range lines[1:] { |
| 295 | buf.WriteString(strings.Repeat(" ", indent+markerW)) |
| 296 | buf.WriteString(l + "\n") |
| 297 | } |
| 298 | for s := first.NextSibling(); s != nil; s = s.NextSibling() { |
| 299 | r.renderBlock(buf, s, src, indent+markerW) |
| 300 | } |
| 301 | } else { |
| 302 | buf.WriteString("\n") |
| 303 | r.renderBlocks(buf, item, src, indent+2) |
| 304 | } |
| 305 | } |
| 306 | buf.WriteString("\n") |
| 307 | } |
| 308 | |
| 309 | func (r *mdRenderer) renderFenced(buf *strings.Builder, n ast.Node, src []byte, indent int) { |
| 310 | prefix := strings.Repeat(" ", indent) + dim("│ ") |
| 311 | if r.copyMode { |
| 312 | prefix = copyOmitSpan(prefix) |
| 313 | } |
| 314 | for i := range n.Lines().Len() { |
| 315 | l := n.Lines().At(i) |
| 316 | line := strings.TrimRight(string(l.Value(src)), "\n") |
| 317 | buf.WriteString(prefix) |
| 318 | buf.WriteString(accent(line)) |
| 319 | buf.WriteString("\n") |
| 320 | } |
| 321 | buf.WriteString("\n") |
| 322 | } |
| 323 | |
| 324 | func (r *mdRenderer) renderBlockquote(buf *strings.Builder, n *ast.Blockquote, src []byte, indent int) { |
| 325 | var inner strings.Builder |
| 326 | prefix := strings.Repeat(" ", indent) + dim("▎ ") |
| 327 | // The quote's body is laid out at column 0 and shifted right by the rail |
| 328 | // afterwards, so it has to be wrapped to what is left beside the rail. |
| 329 | outer := r.width |
| 330 | r.width = max(outer-visibleWidth(prefix), 8) |
| 331 | r.renderBlocks(&inner, n, src, 0) |
| 332 | r.width = outer |
| 333 | if r.copyMode { |
| 334 | prefix = copyOmitSpan(prefix) |
| 335 | } |
| 336 | for line := range strings.SplitSeq(strings.TrimRight(inner.String(), "\n"), "\n") { |
| 337 | buf.WriteString(prefix) |
| 338 | buf.WriteString(dim(line)) |
| 339 | buf.WriteString("\n") |
| 340 | } |
| 341 | buf.WriteString("\n") |
| 342 | } |
| 343 | |
| 344 | // collectInline walks an inline subtree and returns its ANSI-styled flat text. |
| 345 | func (r *mdRenderer) collectInline(n ast.Node, src []byte) string { |
| 346 | var b strings.Builder |
| 347 | r.appendInline(&b, n, src) |
| 348 | return b.String() |
| 349 | } |
| 350 | |
| 351 | func (r *mdRenderer) appendInline(b *strings.Builder, n ast.Node, src []byte) { |
| 352 | for c := n.FirstChild(); c != nil; c = c.NextSibling() { |
| 353 | switch v := c.(type) { |
| 354 | case *ast.Text: |
| 355 | b.Write(v.Segment.Value(src)) |
| 356 | switch { |
| 357 | case v.HardLineBreak(): |
| 358 | b.WriteByte('\n') |
| 359 | case v.SoftLineBreak(): |
| 360 | b.WriteByte(' ') |
| 361 | } |
| 362 | case *ast.Emphasis: |
| 363 | var inner strings.Builder |
| 364 | r.appendInline(&inner, v, src) |
| 365 | if v.Level == 2 { |
| 366 | b.WriteString(bold(inner.String())) |
| 367 | } else { |
| 368 | b.WriteString(italic(inner.String())) |
| 369 | } |
| 370 | case *ast.CodeSpan: |
| 371 | var inner strings.Builder |
| 372 | r.appendInline(&inner, v, src) |
| 373 | b.WriteString(accent(inner.String())) |
| 374 | case *ast.Link: |
| 375 | var inner strings.Builder |
| 376 | r.appendInline(&inner, v, src) |
| 377 | b.WriteString(inner.String()) |
| 378 | b.WriteString(dim(" (" + string(v.Destination) + ")")) |
| 379 | case *ast.AutoLink: |
| 380 | b.WriteString(string(v.URL(src))) |
| 381 | case *ast.RawHTML: |
| 382 | // drop — rare in chat output and would print as literal escapes |
| 383 | case *mathNode: |
| 384 | rendered := italic(v.value) |
| 385 | if !r.copyMode { |
| 386 | b.WriteString(rendered) |
| 387 | break |
| 388 | } |
| 389 | source := "$" + v.source + "$" |
| 390 | if v.display { |
| 391 | source = "$$" + v.source + "$$" |
| 392 | } |
| 393 | id := fmt.Sprintf("%s-%d", r.copySpanPrefix, r.nextCopySpanID) |
| 394 | r.nextCopySpanID++ |
| 395 | b.WriteString(copySpanStartMarker(id, source)) |
| 396 | b.WriteString(rendered) |
| 397 | b.WriteString(copySpanEndMarker(id)) |
| 398 | case *ast.String: |
| 399 | b.Write(v.Value) |
| 400 | default: |
| 401 | r.appendInline(b, c, src) |
| 402 | } |
| 403 | } |
| 404 | } |
| 405 | |
| 406 | // renderTable lays out a GFM table as terminal columns separated by dim |
| 407 | // "│" rails with a "─┼─" rule under the header. Column widths auto-fit the |
| 408 | // widest cell in each column and are capped to a fair share of the terminal |
| 409 | // width so a wide table can't push the input off-screen. Long cells are |
| 410 | // wrapped across multiple visual rows (the whole logical row inflates to |
| 411 | // the tallest cell), not truncated, so no content is lost. Alignment is |
| 412 | // left-only — Markdown's ":---:" hints are read but not honoured yet. |
| 413 | func (r *mdRenderer) renderTable(buf *strings.Builder, n *extast.Table, src []byte, indent int) { |
| 414 | var header []string |
| 415 | var rows [][]string |
| 416 | |
| 417 | for c := n.FirstChild(); c != nil; c = c.NextSibling() { |
| 418 | switch row := c.(type) { |
| 419 | case *extast.TableHeader: |
| 420 | header = r.collectCells(row, src) |
| 421 | case *extast.TableRow: |
| 422 | rows = append(rows, r.collectCells(row, src)) |
| 423 | } |
| 424 | } |
| 425 | if len(header) == 0 && len(rows) == 0 { |
| 426 | return |
| 427 | } |
| 428 | |
| 429 | cols := len(header) |
| 430 | for _, row := range rows { |
| 431 | if len(row) > cols { |
| 432 | cols = len(row) |
| 433 | } |
| 434 | } |
| 435 | if cols == 0 { |
| 436 | return |
| 437 | } |
| 438 | |
| 439 | // Initial widths fit the widest cell content per column. |
| 440 | widths := make([]int, cols) |
| 441 | pick := func(i, w int) { |
| 442 | if i < cols && w > widths[i] { |
| 443 | widths[i] = w |
| 444 | } |
| 445 | } |
| 446 | for i, h := range header { |
| 447 | pick(i, visibleWidth(h)) |
| 448 | } |
| 449 | for _, row := range rows { |
| 450 | for i, c := range row { |
| 451 | pick(i, visibleWidth(c)) |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | // Cap each column so the whole table fits the terminal: total = sum of |
| 456 | // widths + separators (3 chars each) + indent. Distribute the budget |
| 457 | // proportionally to the natural widths so columns with rich content |
| 458 | // keep more space than narrow ones. |
| 459 | available := max(r.width-indent-3*(cols-1), cols*3) |
| 460 | total := 0 |
| 461 | for _, w := range widths { |
| 462 | total += w |
| 463 | } |
| 464 | if total > available { |
| 465 | for i := range widths { |
| 466 | widths[i] = max(widths[i]*available/total, 3) |
| 467 | } |
| 468 | } |
| 469 | |
| 470 | prefix := strings.Repeat(" ", indent) |
| 471 | sep := dim(" │ ") |
| 472 | |
| 473 | if len(header) > 0 { |
| 474 | r.renderTableRow(buf, prefix, sep, header, widths, true) |
| 475 | buf.WriteString(prefix) |
| 476 | for i := range widths { |
| 477 | if i > 0 { |
| 478 | buf.WriteString(dim("─┼─")) |
| 479 | } |
| 480 | buf.WriteString(dim(strings.Repeat("─", widths[i]))) |
| 481 | } |
| 482 | buf.WriteByte('\n') |
| 483 | } |
| 484 | for _, row := range rows { |
| 485 | r.renderTableRow(buf, prefix, sep, row, widths, false) |
| 486 | } |
| 487 | buf.WriteByte('\n') |
| 488 | } |
| 489 | |
| 490 | // renderTableRow lays out one logical row across multiple visual rows when |
| 491 | // any cell wraps. wrapAnsi handles per-cell word + hard-break wrapping; the |
| 492 | // row's visual height = max wrapped lines across all cells. Cells that ran |
| 493 | // out of content get padded with spaces so the rail "│" stays aligned. |
| 494 | func (r *mdRenderer) renderTableRow(buf *strings.Builder, prefix, sep string, cells []string, widths []int, isHeader bool) { |
| 495 | cols := len(widths) |
| 496 | wrapped := make([][]string, cols) |
| 497 | maxLines := 1 |
| 498 | for i := range cols { |
| 499 | var text string |
| 500 | if i < len(cells) { |
| 501 | text = cells[i] |
| 502 | } |
| 503 | wrapped[i] = strings.Split(wrapAnsi(text, widths[i]), "\n") |
| 504 | if len(wrapped[i]) > maxLines { |
| 505 | maxLines = len(wrapped[i]) |
| 506 | } |
| 507 | } |
| 508 | for line := range maxLines { |
| 509 | buf.WriteString(prefix) |
| 510 | for i := range cols { |
| 511 | if i > 0 { |
| 512 | buf.WriteString(sep) |
| 513 | } |
| 514 | var cell string |
| 515 | if line < len(wrapped[i]) { |
| 516 | cell = wrapped[i][line] |
| 517 | } |
| 518 | padded := padRight(cell, widths[i]) |
| 519 | if isHeader { |
| 520 | padded = bold(padded) |
| 521 | } |
| 522 | buf.WriteString(padded) |
| 523 | } |
| 524 | buf.WriteByte('\n') |
| 525 | } |
| 526 | } |
| 527 | |
| 528 | // collectCells walks a TableHeader / TableRow node and pulls each TableCell's |
| 529 | // inline content as an ANSI-styled string. Non-cell children are ignored. |
| 530 | func (r *mdRenderer) collectCells(parent ast.Node, src []byte) []string { |
| 531 | var out []string |
| 532 | for c := parent.FirstChild(); c != nil; c = c.NextSibling() { |
| 533 | if cell, ok := c.(*extast.TableCell); ok { |
| 534 | out = append(out, strings.TrimSpace(r.collectInline(cell, src))) |
| 535 | } |
| 536 | } |
| 537 | return out |
| 538 | } |
| 539 | |
| 540 | // inlineCarrier returns n when it's a paragraph or text-block (both hold |
| 541 | // inline runs), else nil. Used by list rendering so the marker line gets the |
| 542 | // inline content regardless of whether the list is tight or loose. |
| 543 | func inlineCarrier(n ast.Node) ast.Node { |
| 544 | switch n.(type) { |
| 545 | case *ast.Paragraph, *ast.TextBlock: |
| 546 | return n |
| 547 | } |
| 548 | return nil |
| 549 | } |
| 550 | |
| 551 | // wrapAnsi word-wraps text to width columns, hard-breaking any single word too |
| 552 | // wide to fit on its own line — the path CJK takes, having no inter-word spaces. |
| 553 | // ANSI SGR escapes are preserved and counted as zero width; wide chars count as |
| 554 | // two columns. Thin wrapper over x/ansi's Wrap (already in the dep tree). |
| 555 | func wrapAnsi(text string, width int) string { |
| 556 | if width < 4 { |
| 557 | width = 4 |
| 558 | } |
| 559 | return ansi.Wrap(text, width, "") |
| 560 | } |
| 561 |