Merge pull request #2145 from spelufo/katex-displaymode

Make latex-parser.js render $$$ as display mode math

plugins/tiddlywiki/katex/latex-parser.js

@@ -29,23 +29,26 @@ exports.types = {inline: true};
 exports.init = function(parser) {
 	this.parser = parser;
 	// Regexp to match
-	this.matchRegExp = /\$\$(?!\$)/mg;
+	this.matchRegExp = /\$\$\$?(?!\$)/mg;
 };
 
 exports.parse = function() {
 	// Move past the match
 	this.parser.pos = this.matchRegExp.lastIndex;
-	var reEnd = /\$\$/mg;
+	var reEnd = /\$\$\$?/mg;
 	// Look for the end marker
 	reEnd.lastIndex = this.parser.pos;
 	var match = reEnd.exec(this.parser.source),
-		text;
+		text,
+		displayMode;
 	// Process the text
 	if(match) {
 		text = this.parser.source.substring(this.parser.pos,match.index);
+		displayMode = match.indexOf('$$$') != -1;
 		this.parser.pos = match.index + match[0].length;
 	} else {
 		text = this.parser.source.substr(this.parser.pos);
+		displayMode = false;
 		this.parser.pos = this.parser.sourceLength;
 	}
 	return [{
@@ -54,8 +57,13 @@ exports.parse = function() {
 			text: {
 				type: "text",
 				value: text
-			}}
+			},
+			displayMode: {
+				type: "text",
+				value: displayMode ? "true" : "false"
+			}
+		}
 	}];
 };
 
-})();
+})();

plugins/tiddlywiki/katex/usage.tid

@@ -6,10 +6,12 @@ The usual way to include ~LaTeX is to use `$$`. For example:
 $$\displaystyle f(x) = \int_{-\infty}^\infty\hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi$$
 ```
 
+To make math render in display mode, use `$$$` instead of `$$`.
+
 The underlying widget can also be used directly, giving more flexibility:
 
 ```
-<$latex text="\displaystyle f(x) = \int_{-\infty}^\infty\hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi"></$latex>
+<$latex text="f(x) = \int_{-\infty}^\infty\hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi" displayMode="true"></$latex>
 ```
 
 The KaTeX widget is provided under the name `<$latex>` and is also available under the alias `<$katex>`. It's better to use the generic `<$latex>` name unless you are running multiple ~LaTeX plugins and wish to specifically target KaTeX.