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authoraltaf-creator <dev@altafcreator.com>2026-04-30 22:01:53 +0800
committeraltaf-creator <dev@altafcreator.com>2026-04-30 22:01:53 +0800
commitdb1c6676a13798ee57dbac429a1d5045b60356fb (patch)
tree5ff305c09686de50bbcac404c1954e42c26ba494 /packages/markdown-it-14.1.0/lib/rules_block/table.mjs
parent97fa8f57fbefcbfa6b3e56c31a1e5b60ef1a9e37 (diff)
quite a big commit
Diffstat (limited to 'packages/markdown-it-14.1.0/lib/rules_block/table.mjs')
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1 files changed, 0 insertions, 228 deletions
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-// GFM table, https://github.github.com/gfm/#tables-extension-
-
-import { isSpace } from '../common/utils.mjs'
-
-// Limit the amount of empty autocompleted cells in a table,
-// see https://github.com/markdown-it/markdown-it/issues/1000,
-//
-// Both pulldown-cmark and commonmark-hs limit the number of cells this way to ~200k.
-// We set it to 65k, which can expand user input by a factor of x370
-// (256x256 square is 1.8kB expanded into 650kB).
-const MAX_AUTOCOMPLETED_CELLS = 0x10000
-
-function getLine (state, line) {
- const pos = state.bMarks[line] + state.tShift[line]
- const max = state.eMarks[line]
-
- return state.src.slice(pos, max)
-}
-
-function escapedSplit (str) {
- const result = []
- const max = str.length
-
- let pos = 0
- let ch = str.charCodeAt(pos)
- let isEscaped = false
- let lastPos = 0
- let current = ''
-
- while (pos < max) {
- if (ch === 0x7c/* | */) {
- if (!isEscaped) {
- // pipe separating cells, '|'
- result.push(current + str.substring(lastPos, pos))
- current = ''
- lastPos = pos + 1
- } else {
- // escaped pipe, '\|'
- current += str.substring(lastPos, pos - 1)
- lastPos = pos
- }
- }
-
- isEscaped = (ch === 0x5c/* \ */)
- pos++
-
- ch = str.charCodeAt(pos)
- }
-
- result.push(current + str.substring(lastPos))
-
- return result
-}
-
-export default function table (state, startLine, endLine, silent) {
- // should have at least two lines
- if (startLine + 2 > endLine) { return false }
-
- let nextLine = startLine + 1
-
- if (state.sCount[nextLine] < state.blkIndent) { return false }
-
- // if it's indented more than 3 spaces, it should be a code block
- if (state.sCount[nextLine] - state.blkIndent >= 4) { return false }
-
- // first character of the second line should be '|', '-', ':',
- // and no other characters are allowed but spaces;
- // basically, this is the equivalent of /^[-:|][-:|\s]*$/ regexp
-
- let pos = state.bMarks[nextLine] + state.tShift[nextLine]
- if (pos >= state.eMarks[nextLine]) { return false }
-
- const firstCh = state.src.charCodeAt(pos++)
- if (firstCh !== 0x7C/* | */ && firstCh !== 0x2D/* - */ && firstCh !== 0x3A/* : */) { return false }
-
- if (pos >= state.eMarks[nextLine]) { return false }
-
- const secondCh = state.src.charCodeAt(pos++)
- if (secondCh !== 0x7C/* | */ && secondCh !== 0x2D/* - */ && secondCh !== 0x3A/* : */ && !isSpace(secondCh)) {
- return false
- }
-
- // if first character is '-', then second character must not be a space
- // (due to parsing ambiguity with list)
- if (firstCh === 0x2D/* - */ && isSpace(secondCh)) { return false }
-
- while (pos < state.eMarks[nextLine]) {
- const ch = state.src.charCodeAt(pos)
-
- if (ch !== 0x7C/* | */ && ch !== 0x2D/* - */ && ch !== 0x3A/* : */ && !isSpace(ch)) { return false }
-
- pos++
- }
-
- let lineText = getLine(state, startLine + 1)
- let columns = lineText.split('|')
- const aligns = []
- for (let i = 0; i < columns.length; i++) {
- const t = columns[i].trim()
- if (!t) {
- // allow empty columns before and after table, but not in between columns;
- // e.g. allow ` |---| `, disallow ` ---||--- `
- if (i === 0 || i === columns.length - 1) {
- continue
- } else {
- return false
- }
- }
-
- if (!/^:?-+:?$/.test(t)) { return false }
- if (t.charCodeAt(t.length - 1) === 0x3A/* : */) {
- aligns.push(t.charCodeAt(0) === 0x3A/* : */ ? 'center' : 'right')
- } else if (t.charCodeAt(0) === 0x3A/* : */) {
- aligns.push('left')
- } else {
- aligns.push('')
- }
- }
-
- lineText = getLine(state, startLine).trim()
- if (lineText.indexOf('|') === -1) { return false }
- if (state.sCount[startLine] - state.blkIndent >= 4) { return false }
- columns = escapedSplit(lineText)
- if (columns.length && columns[0] === '') columns.shift()
- if (columns.length && columns[columns.length - 1] === '') columns.pop()
-
- // header row will define an amount of columns in the entire table,
- // and align row should be exactly the same (the rest of the rows can differ)
- const columnCount = columns.length
- if (columnCount === 0 || columnCount !== aligns.length) { return false }
-
- if (silent) { return true }
-
- const oldParentType = state.parentType
- state.parentType = 'table'
-
- // use 'blockquote' lists for termination because it's
- // the most similar to tables
- const terminatorRules = state.md.block.ruler.getRules('blockquote')
-
- const token_to = state.push('table_open', 'table', 1)
- const tableLines = [startLine, 0]
- token_to.map = tableLines
-
- const token_tho = state.push('thead_open', 'thead', 1)
- token_tho.map = [startLine, startLine + 1]
-
- const token_htro = state.push('tr_open', 'tr', 1)
- token_htro.map = [startLine, startLine + 1]
-
- for (let i = 0; i < columns.length; i++) {
- const token_ho = state.push('th_open', 'th', 1)
- if (aligns[i]) {
- token_ho.attrs = [['style', 'text-align:' + aligns[i]]]
- }
-
- const token_il = state.push('inline', '', 0)
- token_il.content = columns[i].trim()
- token_il.children = []
-
- state.push('th_close', 'th', -1)
- }
-
- state.push('tr_close', 'tr', -1)
- state.push('thead_close', 'thead', -1)
-
- let tbodyLines
- let autocompletedCells = 0
-
- for (nextLine = startLine + 2; nextLine < endLine; nextLine++) {
- if (state.sCount[nextLine] < state.blkIndent) { break }
-
- let terminate = false
- for (let i = 0, l = terminatorRules.length; i < l; i++) {
- if (terminatorRules[i](state, nextLine, endLine, true)) {
- terminate = true
- break
- }
- }
-
- if (terminate) { break }
- lineText = getLine(state, nextLine).trim()
- if (!lineText) { break }
- if (state.sCount[nextLine] - state.blkIndent >= 4) { break }
- columns = escapedSplit(lineText)
- if (columns.length && columns[0] === '') columns.shift()
- if (columns.length && columns[columns.length - 1] === '') columns.pop()
-
- // note: autocomplete count can be negative if user specifies more columns than header,
- // but that does not affect intended use (which is limiting expansion)
- autocompletedCells += columnCount - columns.length
- if (autocompletedCells > MAX_AUTOCOMPLETED_CELLS) { break }
-
- if (nextLine === startLine + 2) {
- const token_tbo = state.push('tbody_open', 'tbody', 1)
- token_tbo.map = tbodyLines = [startLine + 2, 0]
- }
-
- const token_tro = state.push('tr_open', 'tr', 1)
- token_tro.map = [nextLine, nextLine + 1]
-
- for (let i = 0; i < columnCount; i++) {
- const token_tdo = state.push('td_open', 'td', 1)
- if (aligns[i]) {
- token_tdo.attrs = [['style', 'text-align:' + aligns[i]]]
- }
-
- const token_il = state.push('inline', '', 0)
- token_il.content = columns[i] ? columns[i].trim() : ''
- token_il.children = []
-
- state.push('td_close', 'td', -1)
- }
- state.push('tr_close', 'tr', -1)
- }
-
- if (tbodyLines) {
- state.push('tbody_close', 'tbody', -1)
- tbodyLines[1] = nextLine
- }
-
- state.push('table_close', 'table', -1)
- tableLines[1] = nextLine
-
- state.parentType = oldParentType
- state.line = nextLine
- return true
-}