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table.js
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table.js
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// GFM table, non-standard
'use strict';
function getLine(state, line) {
var pos = state.bMarks[line] + state.blkIndent,
max = state.eMarks[line];
return state.src.substr(pos, max - pos);
}
function escapedSplit(str) {
var result = [],
pos = 0,
max = str.length,
ch,
escapes = 0,
lastPos = 0,
backTicked = false,
lastBackTick = 0;
ch = str.charCodeAt(pos);
while (pos < max) {
if (ch === 0x60/* ` */ && (escapes % 2 === 0)) {
backTicked = !backTicked;
lastBackTick = pos;
} else if (ch === 0x7c/* | */ && (escapes % 2 === 0) && !backTicked) {
result.push(str.substring(lastPos, pos));
lastPos = pos + 1;
} else if (ch === 0x5c/* \ */) {
escapes++;
} else {
escapes = 0;
}
pos++;
// If there was an un-closed backtick, go back to just after
// the last backtick, but as if it was a normal character
if (pos === max && backTicked) {
backTicked = false;
pos = lastBackTick + 1;
}
ch = str.charCodeAt(pos);
}
result.push(str.substring(lastPos));
return result;
}
module.exports = function table(state, startLine, endLine, silent) {
var ch, lineText, pos, i, nextLine, columns, columnCount, token,
aligns, t, tableLines, tbodyLines;
// should have at least three lines
if (startLine + 2 > endLine) { return false; }
nextLine = startLine + 1;
if (state.sCount[nextLine] < state.blkIndent) { return false; }
// first character of the second line should be '|' or '-'
pos = state.bMarks[nextLine] + state.tShift[nextLine];
if (pos >= state.eMarks[nextLine]) { return false; }
ch = state.src.charCodeAt(pos);
if (ch !== 0x7C/* | */ && ch !== 0x2D/* - */ && ch !== 0x3A/* : */) { return false; }
lineText = getLine(state, startLine + 1);
if (!/^[-:| ]+$/.test(lineText)) { return false; }
columns = lineText.split('|');
aligns = [];
for (i = 0; i < columns.length; i++) {
t = columns[i].trim();
if (!t) {
// allow empty columns before and after table, but not in between columns;
// e.g. allow ` |---| `, disallow ` ---||--- `
if (i === 0 || i === columns.length - 1) {
continue;
} else {
return false;
}
}
if (!/^:?-+:?$/.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; }
columns = escapedSplit(lineText.replace(/^\||\|$/g, ''));
// header row will define an amount of columns in the entire table,
// and align row shouldn't be smaller than that (the rest of the rows can)
columnCount = columns.length;
if (columnCount > aligns.length) { return false; }
if (silent) { return true; }
token = state.push('table_open', 'table', 1);
token.map = tableLines = [ startLine, 0 ];
token = state.push('thead_open', 'thead', 1);
token.map = [ startLine, startLine + 1 ];
token = state.push('tr_open', 'tr', 1);
token.map = [ startLine, startLine + 1 ];
for (i = 0; i < columns.length; i++) {
token = state.push('th_open', 'th', 1);
token.map = [ startLine, startLine + 1 ];
if (aligns[i]) {
token.attrs = [ [ 'style', 'text-align:' + aligns[i] ] ];
}
token = state.push('inline', '', 0);
token.content = columns[i].trim();
token.map = [ startLine, startLine + 1 ];
token.children = [];
token = state.push('th_close', 'th', -1);
}
token = state.push('tr_close', 'tr', -1);
token = state.push('thead_close', 'thead', -1);
token = state.push('tbody_open', 'tbody', 1);
token.map = tbodyLines = [ startLine + 2, 0 ];
for (nextLine = startLine + 2; nextLine < endLine; nextLine++) {
if (state.sCount[nextLine] < state.blkIndent) { break; }
lineText = getLine(state, nextLine);
if (lineText.indexOf('|') === -1) { break; }
// keep spaces at beginning of line to indicate an empty first cell, but
// strip trailing whitespace
columns = escapedSplit(lineText.replace(/^\||\|\s*$/g, ''));
token = state.push('tr_open', 'tr', 1);
for (i = 0; i < columnCount; i++) {
token = state.push('td_open', 'td', 1);
if (aligns[i]) {
token.attrs = [ [ 'style', 'text-align:' + aligns[i] ] ];
}
token = state.push('inline', '', 0);
token.content = columns[i] ? columns[i].trim() : '';
token.children = [];
token = state.push('td_close', 'td', -1);
}
token = state.push('tr_close', 'tr', -1);
}
token = state.push('tbody_close', 'tbody', -1);
token = state.push('table_close', 'table', -1);
tableLines[1] = tbodyLines[1] = nextLine;
state.line = nextLine;
return true;
};