Support for MathJax

index.html

@@ -513,6 +513,13 @@
 								</select>
 							</div>
 						</div>
+                        <div class="control-group">
+                            <label class="control-label" for="input-settings-enable-mathjax">MathJax support
+                            </label>
+                            <div class="controls">
+                                <input type="checkbox" id="input-settings-enable-mathjax" />
+                            </div>
+                        </div>
 						<div class="control-group">
 							<label class="control-label"
 								for="input-settings-editor-font-size">Editor font size</label>

js/Markdown.Editor.js

@@ -828,7 +828,7 @@
         var elapsedTime;
         var oldInputText;
         var maxDelay = 3000;
-        var startType = "delayed"; // The other legal value is "manual"
+        var startType = "manual"; // The other legal value is "manual"
 
         // Adds event listeners to elements
         var setupEvents = function (inputElem, listener) {

js/core.js

@@ -207,6 +207,7 @@ define(
 	// Setting management
 	core.settings = {
 		converterType : "markdown-extra-prettify",
+		enableMathJax : true,
 		layoutOrientation : "horizontal",
 		scrollLink : true,
 		editorFontSize : 14,
@@ -233,6 +234,8 @@ define(
 		$("#input-settings-scroll-link").prop("checked", core.settings.scrollLink);
 		// Converter type
 		$("#input-settings-converter-type").val(core.settings.converterType);
+		// MathJax
+		$("#input-settings-enable-mathjax").prop("checked", core.settings.enableMathJax);
 		// Editor font size
 		$("#input-settings-editor-font-size").val(core.settings.editorFontSize);
 		// Default content
@@ -251,6 +254,8 @@ define(
 			"input:radio[name=radio-layout-orientation]:checked").prop("value");
 		// Converter type
 		newSettings.converterType = $("#input-settings-converter-type").val();
+		// MathJax
+		newSettings.enableMathJax = $("#input-settings-enable-mathjax").prop("checked");
 		// Scroll Link
 		newSettings.scrollLink = $("#input-settings-scroll-link").prop("checked");
 		// Editor font size
@@ -355,7 +360,6 @@ define(
 		
 		// apply Scroll Link 
 		lastEditorScrollTop = -9;
-		lastPreviewScrollTop = -9;
 		scrollLink();
 	}, 500);
 	
@@ -370,7 +374,6 @@ define(
 		var editorScrollTop = editorElt.scrollTop();
 		var previewElt = $("#wmd-preview");
 		var previewScrollTop = previewElt.scrollTop();
-		console.log(previewScrollTop);
 		function animate(srcScrollTop, srcSectionList, destElt, destSectionList, callback) {
 			// Find the section corresponding to the offset
 			var sectionIndex = undefined;
@@ -501,8 +504,11 @@ define(
 		if(core.settings.converterType == "markdown-extra-prettify") {
 			editor.hooks.chain("onPreviewRefresh", prettyPrint);
 		}
-		if(viewerMode === false && core.settings.scrollLink === true) {
+		function previewFinished() {
-			editor.hooks.chain("onPreviewRefresh", function() {
+			if(viewerMode === false && core.settings.scrollLink === true) {
+				// MathJax may have change the scroll position. Restore it
+				$("#wmd-preview").scrollTop(lastPreviewScrollTop);
+				// Update Scroll Link sections
 				// Modify scroll position of the preview not the editor
 				lastEditorScrollTop = -9;
 				buildSections();
@@ -511,7 +517,14 @@ define(
 					lastEditorScrollTop = -9;
 					buildSections();
 				});
-			});
+			}
+		}
+		// MathJax
+		if(core.settings.enableMathJax === true) {
+			mathjaxEditing.prepareWmdForMathJax(editor, [["$", "$"], ["\\\\(", "\\\\)"]], previewFinished);
+		}
+		else {
+			editor.hooks.chain("onPreviewRefresh", previewFinished);
 		}
 		// Custom insert link dialog
 		editor.hooks.set("insertLinkDialog", function (callback) {
@@ -527,11 +540,10 @@ define(
 			$("#modal-insert-image").modal();
 			return true;
 		});
-		// MathJax
-		mathjaxEditing.prepareWmdForMathJax(editor, [["$", "$"], ["\\\\(", "\\\\)"]]);
 		
 		editor.run();
 		firstChange = false;
+		$("#wmd-input").bind('input propertychange', _.throttle(editor.refreshPreview, 1000));
 
 		// Hide default buttons
 		$(".wmd-button-row").addClass("btn-group").find("li:not(.wmd-spacer)")

js/mathjax-editing.js

@@ -1,4 +1,4 @@
-define([ "jquery", "../lib/MathJax/MathJax" ], function($) {
+define([ "../lib/MathJax/MathJax" ], function() {
 	
 	MathJax.Hub.Config({"HTML-CSS": {preferredFont: "TeX",availableFonts: ["STIX", "TeX"],linebreaks: {automatic: true},EqnChunk: (MathJax.Hub.Browser.isMobile ? 10 : 50), imageFont: null},
 	    tex2jax: {inlineMath: [["$", "$"], ["\\\\(", "\\\\)"]],displayMath: [["$$", "$$"], ["\\[", "\\]"]],processEscapes: true,ignoreClass: "tex2jax_ignore|dno"},
@@ -151,24 +151,12 @@ define([ "jquery", "../lib/MathJax/MathJax" ], function($) {
 	// This is run to restart MathJax after it has finished
 	// the previous run (that may have been canceled)
 	//
+	var refreshCallback = undefined;
 	function RestartMJ() {
 		pending = false;
 		HUB.cancelTypeset = false; // won't need to do this in the future
-		// Keep scroll position (due to a weird behavior when updating div) 
-		var scrollTop = undefined;
-		console.log($(preview).scrollTop());
-		HUB.Queue(function() {
-			console.log($(preview).scrollTop());
-			scrollTop = preview.scrollTop;
-		});
 		HUB.Queue([ "Typeset", HUB, preview ]);
-		HUB.Queue(function() {
+		HUB.Queue(refreshCallback);
-			console.log($(preview).scrollTop());
-			setTimeout(function() {
-				console.log($(preview).scrollTop());
-				preview.scrollTop = scrollTop;
-			}, 1000);
-		});
 	}
 
 	//
@@ -179,7 +167,6 @@ define([ "jquery", "../lib/MathJax/MathJax" ], function($) {
 		if (!pending && ready) {
 			pending = true;
 			HUB.Cancel();
-			console.log($(preview).scrollTop());
 			HUB.Queue(RestartMJ);
 		}
 	}
@@ -190,7 +177,8 @@ define([ "jquery", "../lib/MathJax/MathJax" ], function($) {
 	// to handle escaping the math.
 	// Create a preview refresh hook to handle starting MathJax.
 	//
-	function prepareWmdForMathJax(editorObject, delimiters) {
+	function prepareWmdForMathJax(editorObject, delimiters, callback) {
+		refreshCallback = callback;
 		preview = document.getElementById("wmd-preview");
 		inline = delimiters[0][0];