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FIX: rewrite replaceBlock logic to better handle mismatched nested quotes.

This commit is contained in:
Jens Maier 2014-07-27 16:07:47 +02:00
parent 9124cf0eaf
commit 479eb64a76
4 changed files with 85 additions and 84 deletions
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13
app/assets/javascripts/discourse/dialects/code_dialect.js
View File

@ -10,6 +10,15 @@ var acceptableCodeClasses =
"profile", "python", "r", "rib", "rsl", "ruby", "rust", "scala", "smalltalk", "sql", "tex", "text",
"vala", "vbscript", "vhdl"];
function flattenBlocks(blocks) {
var result = "";
blocks.forEach(function(b) {
result += b;
if (b.trailing) { result += b.trailing; }
});
return result;
}
Discourse.Dialect.replaceBlock({
start: /^`{3}([^\n\[\]]+)?\n?([\s\S]*)?/gm,
stop: '```',
@ -19,7 +28,7 @@ Discourse.Dialect.replaceBlock({
if (matches[1] && acceptableCodeClasses.indexOf(matches[1]) !== -1) {
klass = matches[1];
}
return ['p', ['pre', ['code', {'class': klass}, blockContents.join("\n") ]]];
return ['p', ['pre', ['code', {'class': klass}, flattenBlocks(blockContents) ]]];
}
});
@ -50,6 +59,6 @@ Discourse.Dialect.replaceBlock({
skipIfTradtionalLinebreaks: true,
emitter: function(blockContents) {
return ['p', ['pre', blockContents.join("\n")]];
return ['p', ['pre', flattenBlocks(blockContents)]];
}
});

144
app/assets/javascripts/discourse/dialects/dialect.js
View File

@ -133,6 +133,19 @@ function invalidBoundary(args, prev) {
if (args.spaceOrTagBoundary && (!last.match(/(\s|\>)$/))) { return true; }
}
/**
Returns the number of (terminated) lines in a string.
@method countLines
@param {string} str the string.
@returns {Integer} number of terminated lines in str
**/
function countLines(str) {
var index = -1, count = 0;
while ((index = str.indexOf("\n", index + 1)) !== -1) { count++; }
return count;
}
/**
An object used for rendering our dialects.
@ -359,102 +372,71 @@ Discourse.Dialect = {
var linebreaks = dialect.options.traditional_markdown_linebreaks ||
Discourse.SiteSettings.traditional_markdown_linebreaks;
// Some replacers should not be run with traditional linebreaks
if (linebreaks && args.skipIfTradtionalLinebreaks) { return; }
args.start.lastIndex = 0;
var m = (args.start).exec(block);
var result = [], match = (args.start).exec(block);
if (!match) { return; }
if (!m) { return; }
var lastChance = function() {
return !next.some(function(e) { return e.indexOf(args.stop) !== -1; });
};
var startPos = args.start.lastIndex - m[0].length,
leading,
blockContents = [],
result = [],
lineNumber = block.lineNumber;
if (startPos > 0) {
leading = block.slice(0, startPos);
lineNumber += (leading.split("\n").length - 1);
var para = ['p'];
this.processInline(leading).forEach(function (l) {
para.push(l);
});
result.push(para);
// shave off start tag and leading text, if any.
var pos = args.start.lastIndex - match[0].length,
leading = block.slice(0, pos),
trailing = match[2] ? match[2].replace(/^\n*/, "") : "";
if (block.indexOf(args.stop, pos + args.stop.length) === -1 && lastChance()) { return; }
if (leading.length > 0) { result.push(['p'].concat(this.processInline(leading))); }
if (trailing.length > 0) {
next.unshift(MD.mk_block(trailing, block.trailing,
block.lineNumber + countLines(leading) + (match[2] ? match[2].length : 0) - trailing.length));
}
if (m[2]) {
next.unshift(MD.mk_block(m[2], null, lineNumber + 1));
}
// find matching stop tag in blocks.
var contentBlocks = [], nesting = 0, endPos, ep, offset, startPos, sp, m, b;
blockloop:
while (b = next.shift()) {
args.start.lastIndex = 0;
startPos = []; sp = 0;
while (m = (args.start).exec(b)) {
startPos.push(args.start.lastIndex - m[0].length);
args.start.lastIndex = args.start.lastIndex - (m[2] ? m[2].length : 0);
}
endPos = []; ep = 0; offset = 0;
while ((pos = b.indexOf(args.stop, offset)) !== -1) {
endPos.push(pos);
offset += (pos + args.stop.length);
}
lineNumber++;
while (ep < endPos.length) {
if (sp < startPos.length && startPos[sp] < endPos[ep]) {
sp++; nesting++;
} else if (nesting > 0) {
ep++; nesting--;
} else {
break blockloop;
}
}
var blockClosed = false;
for (var i=0; i<next.length; i++) {
if (next[i].indexOf(args.stop) >= 0) {
blockClosed = true;
if (lastChance()) {
ep = endPos.length - 1;
break;
}
nesting += startPos.length - sp;
contentBlocks.push(b);
}
if (!blockClosed) {
if (m[2]) { next.shift(); }
return;
if (ep < endPos.length) {
var before = b.slice(0, endPos[ep]).replace(/\n*$/, ""),
after = b.slice(endPos[ep] + args.stop.length).replace(/^\n*/, "");
if (before.length > 0) contentBlocks.push(MD.mk_block(before, "", b.lineNumber));
if (after.length > 0) next.unshift(MD.mk_block(after, "", b.lineNumber + countLines(before)));
}
var numOpen = 1;
while (next.length > 0) {
var b = next.shift(),
blockLine = b.lineNumber,
diff = ((typeof blockLine === "undefined") ? lineNumber : blockLine) - lineNumber,
endFound = b.indexOf(args.stop),
leadingContents = b.slice(0, endFound),
trailingContents = b.slice(endFound+args.stop.length),
m2;
if (endFound === -1) {
leadingContents = b;
}
args.start.lastIndex = 0;
if (m2 = (args.start).exec(leadingContents)) {
numOpen++;
args.start.lastIndex -= m2[0].length - 1;
while (m2 = (args.start).exec(leadingContents)) {
numOpen++;
args.start.lastIndex -= m2[0].length - 1;
}
}
if (endFound >= 0) { numOpen--; }
for (var j=1; j<diff; j++) {
blockContents.push("");
}
lineNumber = blockLine + b.split("\n").length - 1;
if (endFound >= 0) {
if (trailingContents) {
next.unshift(MD.mk_block(trailingContents.replace(/^\s+/, "")));
}
blockContents.push(leadingContents.replace(/\s+$/, ""));
if (numOpen === 0) {
break;
}
blockContents.push(args.stop);
} else {
blockContents.push(b);
}
}
var emitterResult = args.emitter.call(this, blockContents, m, dialect.options);
if (emitterResult) {
result.push(emitterResult);
}
var emitterResult = args.emitter.call(this, contentBlocks, match, dialect.options);
if (emitterResult) { result.push(emitterResult); }
return result;
});
},

10
test/javascripts/lib/bbcode_test.js
View File

@ -129,6 +129,16 @@ test("quote formatting", function() {
"</div><blockquote><p>abc</p></blockquote></aside>\n\n<p>hello</p>",
"handles new lines properly");
formatQ("[quote=\"Alice, post:1, topic:1\"]\n[quote=\"Bob, post:2, topic:1\"]\n[/quote]\n[/quote]",
"<aside class=\"quote\" data-post=\"1\" data-topic=\"1\"><div class=\"title\"><div class=\"quote-controls\"></div>Alice said:" +
"</div><blockquote><aside class=\"quote\" data-post=\"2\" data-topic=\"1\"><div class=\"title\"><div class=\"quote-controls\"></div>Bob said:" +
"</div><blockquote></blockquote></aside></blockquote></aside>",
"quotes can be nested");
formatQ("[quote=\"Alice, post:1, topic:1\"]\n[quote=\"Bob, post:2, topic:1\"]\n[/quote]",
"<aside class=\"quote\" data-post=\"1\" data-topic=\"1\"><div class=\"title\"><div class=\"quote-controls\"></div>Alice said:" +
"</div><blockquote><p>[quote=\"Bob, post:2, topic:1\"]</p></blockquote></aside>",
"handles mismatched nested quote tags");
});
test("quotes with trailing formatting", function() {

2
test/javascripts/lib/markdown_test.js
View File

@ -301,7 +301,7 @@ test("links with full urls", function() {
test("Code Blocks", function() {
cooked("<pre>\nhello\n</pre>\n",
"<p><pre>\nhello</pre></p>",
"<p><pre>hello</pre></p>",
"pre blocks don't include extra lines");
cooked("```\na\nb\nc\n\nd\n```",