+ chunk.before = chunk.before.replace(/(((\n|^)(\n[ \t]*)*>(.+\n)*.*)+(\n[ \t]*)*$)/,
+ function (totalMatch) {
+ chunk.startTag = totalMatch;
+ return "";
+ });
+ */
+ // This comes down to:
+ // Go backwards as many lines a possible, such that each line
+ // a) starts with ">", or
+ // b) is almost empty, except for whitespace, or
+ // c) is preceeded by an unbroken chain of non-empty lines
+ // leading up to a line that starts with ">" and at least one more character
+ // and in addition
+ // d) at least one line fulfills a)
+ //
+ // Since this is essentially a backwards-moving regex, it's susceptible to
+ // catstrophic backtracking and can cause the browser to hang;
+ // see e.g. http://meta.stackoverflow.com/questions/9807.
+ //
+ // Hence we replaced this by a simple state machine that just goes through the
+ // lines and checks for a), b), and c).
+
+ var match = "";
+ var leftOver = "";
+ if (chunk.before) {
+ var lines = chunk.before.replace(/\n$/, "").split("\n");
+ var inChain = false;
+ for (var i in lines) {
+ var good = false;
+ line = lines[i];
+ inChain = inChain && line.length > 0; // c) any non-empty line continues the chain
+ if (/^>/.test(line)) { // a)
+ good = true;
+ if (!inChain && line.length > 1) // c) any line that starts with ">" and has at least one more character starts the chain
+ inChain = true;
+ } else if (/^[ \t]*$/.test(line)) { // b)
+ good = true;
+ } else {
+ good = inChain; // c) the line is not empty and does not start with ">", so it matches if and only if we're in the chain
+ }
+ if (good) {
+ match += line + "\n";
+ } else {
+ leftOver += match + line;
+ match = "\n";
+ }
+ }
+ if (!/(^|\n)>/.test(match)) { // d)
+ leftOver += match;
+ match = "";
+ }
+ }
+
+ chunk.startTag = match;
+ chunk.before = leftOver;
+
+ // end of change
+
projects / osqa.git / blobdiff