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// GFM table, https://github.github.com/gfm/#tables-extension-
import { isSpace } from '../common/utils.mjs'
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
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()
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
}