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1 files changed, 133 insertions, 0 deletions

diff --git a/node_modules/markdown-it/lib/rules_core/linkify.js b/node_modules/markdown-it/lib/rules_core/linkify.js
new file mode 100644
index 00000000..7c3ffc86
--- /dev/null
+++ b/node_modules/markdown-it/lib/rules_core/linkify.js
@@ -0,0 +1,133 @@
+// Replace link-like texts with link nodes.
+//
+// Currently restricted by `md.validateLink()` to http/https/ftp
+//
+'use strict';
+
+
+var arrayReplaceAt = require('../common/utils').arrayReplaceAt;
+
+
+function isLinkOpen(str) {
+  return /^<a[>\s]/i.test(str);
+}
+function isLinkClose(str) {
+  return /^<\/a\s*>/i.test(str);
+}
+
+
+module.exports = function linkify(state) {
+  var i, j, l, tokens, token, currentToken, nodes, ln, text, pos, lastPos,
+      level, htmlLinkLevel, url, fullUrl, urlText,
+      blockTokens = state.tokens,
+      links;
+
+  if (!state.md.options.linkify) { return; }
+
+  for (j = 0, l = blockTokens.length; j < l; j++) {
+    if (blockTokens[j].type !== 'inline' ||
+        !state.md.linkify.pretest(blockTokens[j].content)) {
+      continue;
+    }
+
+    tokens = blockTokens[j].children;
+
+    htmlLinkLevel = 0;
+
+    // We scan from the end, to keep position when new tags added.
+    // Use reversed logic in links start/end match
+    for (i = tokens.length - 1; i >= 0; i--) {
+      currentToken = tokens[i];
+
+      // Skip content of markdown links
+      if (currentToken.type === 'link_close') {
+        i--;
+        while (tokens[i].level !== currentToken.level && tokens[i].type !== 'link_open') {
+          i--;
+        }
+        continue;
+      }
+
+      // Skip content of html tag links
+      if (currentToken.type === 'html_inline') {
+        if (isLinkOpen(currentToken.content) && htmlLinkLevel > 0) {
+          htmlLinkLevel--;
+        }
+        if (isLinkClose(currentToken.content)) {
+          htmlLinkLevel++;
+        }
+      }
+      if (htmlLinkLevel > 0) { continue; }
+
+      if (currentToken.type === 'text' && state.md.linkify.test(currentToken.content)) {
+
+        text = currentToken.content;
+        links = state.md.linkify.match(text);
+
+        // Now split string to nodes
+        nodes = [];
+        level = currentToken.level;
+        lastPos = 0;
+
+        for (ln = 0; ln < links.length; ln++) {
+
+          url = links[ln].url;
+          fullUrl = state.md.normalizeLink(url);
+          if (!state.md.validateLink(fullUrl)) { continue; }
+
+          urlText = links[ln].text;
+
+          // Linkifier might send raw hostnames like "example.com", where url
+          // starts with domain name. So we prepend http:// in those cases,
+          // and remove it afterwards.
+          //
+          if (!links[ln].schema) {
+            urlText = state.md.normalizeLinkText('http://' + urlText).replace(/^http:\/\//, '');
+          } else if (links[ln].schema === 'mailto:' && !/^mailto:/i.test(urlText)) {
+            urlText = state.md.normalizeLinkText('mailto:' + urlText).replace(/^mailto:/, '');
+          } else {
+            urlText = state.md.normalizeLinkText(urlText);
+          }
+
+          pos = links[ln].index;
+
+          if (pos > lastPos) {
+            token         = new state.Token('text', '', 0);
+            token.content = text.slice(lastPos, pos);
+            token.level   = level;
+            nodes.push(token);
+          }
+
+          token         = new state.Token('link_open', 'a', 1);
+          token.attrs   = [ [ 'href', fullUrl ] ];
+          token.level   = level++;
+          token.markup  = 'linkify';
+          token.info    = 'auto';
+          nodes.push(token);
+
+          token         = new state.Token('text', '', 0);
+          token.content = urlText;
+          token.level   = level;
+          nodes.push(token);
+
+          token         = new state.Token('link_close', 'a', -1);
+          token.level   = --level;
+          token.markup  = 'linkify';
+          token.info    = 'auto';
+          nodes.push(token);
+
+          lastPos = links[ln].lastIndex;
+        }
+        if (lastPos < text.length) {
+          token         = new state.Token('text', '', 0);
+          token.content = text.slice(lastPos);
+          token.level   = level;
+          nodes.push(token);
+        }
+
+        // replace current node
+        blockTokens[j].children = tokens = arrayReplaceAt(tokens, i, nodes);
+      }
+    }
+  }
+};