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53 lines
1.6 KiB
53 lines
1.6 KiB
10 years ago
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// Simple typographyc replacements
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//
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'use strict';
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// TODO:
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// - fractionals 1/2, 1/4, 3/4 -> ½, ¼, ¾
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// - miltiplication 2 x 4 -> 2 × 4
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var COPY_RE = /\((c|tm|r|p)\)/i;
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var RARE_RE = /\+-|\.\.|\?\?\?\?|!!!!|,,|--/;
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module.exports = function replace(state) {
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var i, token, text, inlineTokens, blkIdx;
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if (!state.options.typographer) { return; }
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for (blkIdx = state.tokens.length - 1; blkIdx >= 0; blkIdx--) {
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if (state.tokens[blkIdx].type !== 'inline') { continue; }
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inlineTokens = state.tokens[blkIdx].children;
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for (i = inlineTokens.length - 1; i >= 0; i--) {
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token = inlineTokens[i];
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if (token.type === 'text') {
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text = token.content;
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if (COPY_RE.test(text)) {
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text = text.replace(/\(c\)/gi, '©')
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.replace(/\(tm\)/gi, '™')
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.replace(/\(r\)/gi, '®')
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.replace(/\(p\)/gi, '§');
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}
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if (RARE_RE.test(text)) {
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text = text.replace(/\+-/g, '±')
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// .., ..., ....... -> …
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// but ?..... & !..... -> ?.. & !..
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.replace(/\.{2,}/g, '…').replace(/([?!])…/g, '$1..')
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.replace(/([?!]){4,}/g, '$1$1$1').replace(/,{2,}/g, ',')
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// em-dash
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.replace(/(^|[^-])---([^-]|$)/mg, '$1\u2014$2')
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// en-dash
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.replace(/(^|\s)--(\s|$)/mg, '$1\u2013$2')
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.replace(/(^|[^-\s])--([^-\s]|$)/mg, '$1\u2013$2');
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}
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token.content = text;
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}
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}
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}
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};
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