95 lines
2.4 KiB
JavaScript
95 lines
2.4 KiB
JavaScript
// fences (``` lang, ~~~ lang)
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'use strict';
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module.exports = function fence(state, startLine, endLine, silent) {
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var marker, len, params, nextLine, mem, token, markup,
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haveEndMarker = false,
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pos = state.bMarks[startLine] + state.tShift[startLine],
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max = state.eMarks[startLine];
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// if it's indented more than 3 spaces, it should be a code block
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if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }
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if (pos + 3 > max) { return false; }
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marker = state.src.charCodeAt(pos);
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if (marker !== 0x7E/* ~ */ && marker !== 0x60 /* ` */) {
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return false;
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}
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// scan marker length
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mem = pos;
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pos = state.skipChars(pos, marker);
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len = pos - mem;
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if (len < 3) { return false; }
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markup = state.src.slice(mem, pos);
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params = state.src.slice(pos, max);
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if (params.indexOf(String.fromCharCode(marker)) >= 0) { return false; }
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// Since start is found, we can report success here in validation mode
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if (silent) { return true; }
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// search end of block
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nextLine = startLine;
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for (;;) {
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nextLine++;
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if (nextLine >= endLine) {
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// unclosed block should be autoclosed by end of document.
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// also block seems to be autoclosed by end of parent
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break;
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}
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pos = mem = state.bMarks[nextLine] + state.tShift[nextLine];
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max = state.eMarks[nextLine];
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if (pos < max && state.sCount[nextLine] < state.blkIndent) {
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// non-empty line with negative indent should stop the list:
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// - ```
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// test
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break;
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}
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if (state.src.charCodeAt(pos) !== marker) { continue; }
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if (state.sCount[nextLine] - state.blkIndent >= 4) {
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// closing fence should be indented less than 4 spaces
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continue;
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}
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pos = state.skipChars(pos, marker);
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// closing code fence must be at least as long as the opening one
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if (pos - mem < len) { continue; }
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// make sure tail has spaces only
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pos = state.skipSpaces(pos);
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if (pos < max) { continue; }
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haveEndMarker = true;
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// found!
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break;
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}
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// If a fence has heading spaces, they should be removed from its inner block
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len = state.sCount[startLine];
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state.line = nextLine + (haveEndMarker ? 1 : 0);
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token = state.push('fence', 'code', 0);
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token.info = params;
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token.content = state.getLines(startLine + 1, nextLine, len, true);
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token.markup = markup;
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token.map = [ startLine, state.line ];
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return true;
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};
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