Markdown parser, done right. 100% CommonMark support, extensions, syntax plugins & high speed
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74 lines
1.9 KiB
74 lines
1.9 KiB
// HTML block
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'use strict';
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var block_names = require('../common/html_blocks');
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var HTML_TAG_OPEN_RE = /^<([a-zA-Z]{1,15})[\s\/>]/;
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var HTML_TAG_CLOSE_RE = /^<\/([a-zA-Z]{1,15})[\s>]/;
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function isLetter(ch) {
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/*eslint no-bitwise:0*/
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var lc = ch | 0x20; // to lower case
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return (lc >= 0x61/* a */) && (lc <= 0x7a/* z */);
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}
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module.exports = function html_block(state, startLine, endLine, silent) {
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var ch, match, nextLine,
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pos = state.bMarks[startLine],
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max = state.eMarks[startLine],
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shift = state.tShift[startLine];
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pos += shift;
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if (!state.md.options.html) { return false; }
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if (shift > 3 || pos + 2 >= max) { return false; }
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if (state.src.charCodeAt(pos) !== 0x3C/* < */) { return false; }
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ch = state.src.charCodeAt(pos + 1);
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if (ch === 0x21/* ! */ || ch === 0x3F/* ? */) {
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// Directive start / comment start / processing instruction start
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if (silent) { return true; }
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} else if (ch === 0x2F/* / */ || isLetter(ch)) {
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// Probably start or end of tag
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if (ch === 0x2F/* \ */) {
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// closing tag
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match = state.src.slice(pos, max).match(HTML_TAG_CLOSE_RE);
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if (!match) { return false; }
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} else {
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// opening tag
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match = state.src.slice(pos, max).match(HTML_TAG_OPEN_RE);
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if (!match) { return false; }
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}
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// Make sure tag name is valid
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if (block_names[match[1].toLowerCase()] !== true) { return false; }
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if (silent) { return true; }
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} else {
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return false;
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}
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// If we are here - we detected HTML block.
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// Let's roll down till empty line (block end).
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nextLine = startLine + 1;
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while (nextLine < state.lineMax && !state.isEmpty(nextLine)) {
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nextLine++;
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}
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state.line = nextLine;
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state.tokens.push({
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type: 'html_block',
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level: state.level,
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lines: [ startLine, state.line ],
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content: state.getLines(startLine, nextLine, 0, true)
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});
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return true;
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};
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