gnezim
117 lines
2.8 KiB
JavaScript
117 lines
2.8 KiB
JavaScript
// Source copied and then modified from
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// https://github.com/remarkjs/remark/blob/master/packages/remark-parse/lib/tokenize/html-block.js
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//
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// MIT License https://github.com/remarkjs/remark/blob/master/license
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const {openCloseTag} = require('./tag')
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module.exports = blockHtml
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const tab = '\t'
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const space = ' '
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const lineFeed = '\n'
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const lessThan = '<'
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const rawOpenExpression = /^<(script|pre|style)(?=(\s|>|$))/i
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const rawCloseExpression = /<\/(script|pre|style)>/i
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const commentOpenExpression = /^<!--/
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const commentCloseExpression = /-->/
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const instructionOpenExpression = /^<\?/
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const instructionCloseExpression = /\?>/
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const directiveOpenExpression = /^<![A-Za-z]/
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const directiveCloseExpression = />/
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const cdataOpenExpression = /^<!\[CDATA\[/
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const cdataCloseExpression = /\]\]>/
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const elementCloseExpression = /^$/
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const otherElementOpenExpression = new RegExp(openCloseTag.source + '\\s*$')
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const fragmentOpenExpression = /^<>/
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function blockHtml(eat, value, silent) {
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const blocks = '[a-z\\.]*(\\.){0,1}[a-z][a-z0-9\\.]*'
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const elementOpenExpression = new RegExp(
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'^</?(' + blocks + ')(?=(\\s|/?>|$))',
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'i'
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)
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const length = value.length
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let index = 0
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let next
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let line
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let offset
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let character
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let count
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let sequence
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let subvalue
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const sequences = [
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[rawOpenExpression, rawCloseExpression, true],
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[commentOpenExpression, commentCloseExpression, true],
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[instructionOpenExpression, instructionCloseExpression, true],
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[directiveOpenExpression, directiveCloseExpression, true],
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[cdataOpenExpression, cdataCloseExpression, true],
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[elementOpenExpression, elementCloseExpression, true],
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[fragmentOpenExpression, elementCloseExpression, true],
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[otherElementOpenExpression, elementCloseExpression, false]
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]
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// Eat initial spacing.
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while (index < length) {
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character = value.charAt(index)
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if (character !== tab && character !== space) {
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break
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}
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index++
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}
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if (value.charAt(index) !== lessThan) {
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return
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}
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next = value.indexOf(lineFeed, index + 1)
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next = next === -1 ? length : next
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line = value.slice(index, next)
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offset = -1
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count = sequences.length
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while (++offset < count) {
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if (sequences[offset][0].test(line)) {
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sequence = sequences[offset]
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break
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}
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}
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if (!sequence) {
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return
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}
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if (silent) {
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return sequence[2]
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}
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index = next
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if (!sequence[1].test(line)) {
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while (index < length) {
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next = value.indexOf(lineFeed, index + 1)
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next = next === -1 ? length : next
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line = value.slice(index + 1, next)
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if (sequence[1].test(line)) {
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if (line) {
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index = next
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}
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break
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}
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index = next
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}
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}
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subvalue = value.slice(0, index)
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return eat(subvalue)({type: 'html', value: subvalue})
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}
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