forked from kaverti/website
71 lines
2.0 KiB
JavaScript
71 lines
2.0 KiB
JavaScript
'use strict'
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// Adapted from https://github.com/markdown-it/markdown-it/blob/fbc6b0fed563ba7c00557ab638fd19752f8e759d/docs/architecture.md
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function findFirstMatchingConfig (link, configs) {
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var i, config
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var href = '/out/uri=' + link.attrs[link.attrIndex('href')][1]
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for (i = 0; i < configs.length; ++i) {
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config = configs[i]
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// if there is no pattern, config matches for all links
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// otherwise, only return config if href matches the pattern set
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if (!config.pattern || new RegExp(config.pattern).test(href)) {
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return config
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}
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}
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}
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function applyAttributes (idx, tokens, attributes) {
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Object.keys(attributes).forEach(function (attr) {
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var attrIndex
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var value = attributes[attr]
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if (attr === 'className') {
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// when dealing with applying classes
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// programatically, some programmers
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// may prefer to use the className syntax
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attr = 'class'
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}
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attrIndex = tokens[idx].attrIndex(attr)
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if (attrIndex < 0) { // attr doesn't exist, add new attribute
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tokens[idx].attrPush([attr, value])
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} else { // attr already exists, overwrite it
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tokens[idx].attrs[attrIndex][1] = value // replace value of existing attr
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}
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})
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}
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function markdownitLinkAttributes (md, configs) {
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if (!configs) {
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configs = []
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} else {
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configs = Array.isArray(configs) ? configs : [configs]
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}
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Object.freeze(configs)
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var defaultRender = md.renderer.rules.link_open || this.defaultRender
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md.renderer.rules.link_open = function (tokens, idx, options, env, self) {
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var config = findFirstMatchingConfig(tokens[idx], configs)
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var attributes = config && config.attrs
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if (attributes) {
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applyAttributes(idx, tokens, attributes)
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}
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// pass token to default renderer.
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return defaultRender(tokens, idx, options, env, self)
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}
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}
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markdownitLinkAttributes.defaultRender = function (tokens, idx, options, env, self) {
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return self.renderToken(tokens, idx, options)
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}
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module.exports = markdownitLinkAttributes
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