wikked: static/js/pagedown/Markdown.Editor.js comparison

comparison static/js/pagedown/Markdown.Editor.js @ 60:8250c977bc50

Moved static files to the root directory.

author	Ludovic Chabant <ludovic@chabant.com>
date	Tue, 05 Feb 2013 14:49:34 -0800
parents	wikked/static/js/pagedown/Markdown.Editor.js@59cad6ce1a1c
children

comparison

equal deleted inserted replaced

-:59ecc742ab8e
+:8250c977bc50
+// needs Markdown.Converter.js at the moment
+(function () {
+var util = {},
+position = {},
+ui = {},
+doc = window.document,
+re = window.RegExp,
+nav = window.navigator,
+SETTINGS = { lineLength: 72 },
+// Used to work around some browser bugs where we can't use feature testing.
+uaSniffed = {
+isIE: /msie/.test(nav.userAgent.toLowerCase()),
+isIE_5or6: /msie 6/.test(nav.userAgent.toLowerCase()) || /msie 5/.test(nav.userAgent.toLowerCase()),
+isOpera: /opera/.test(nav.userAgent.toLowerCase())
+};
+var defaultsStrings = {
+bold: "Strong <strong> Ctrl+B",
+boldexample: "strong text",
+italic: "Emphasis <em> Ctrl+I",
+italicexample: "emphasized text",
+link: "Hyperlink <a> Ctrl+L",
+linkdescription: "enter link description here",
+linkdialog: "<p><b>Insert Hyperlink</b></p><p>http://example.com/ \"optional title\"</p>",
+quote: "Blockquote <blockquote> Ctrl+Q",
+quoteexample: "Blockquote",
+code: "Code Sample <pre><code> Ctrl+K",
+codeexample: "enter code here",
+image: "Image <img> Ctrl+G",
+imagedescription: "enter image description here",
+imagedialog: "<p><b>Insert Image</b></p><p>http://example.com/images/diagram.jpg \"optional title\"<br><br>Need <a href='http://www.google.com/search?q=free+image+hosting' target='_blank'>free image hosting?</a></p>",
+olist: "Numbered List <ol> Ctrl+O",
+ulist: "Bulleted List <ul> Ctrl+U",
+litem: "List item",
+heading: "Heading <h1>/<h2> Ctrl+H",
+headingexample: "Heading",
+hr: "Horizontal Rule <hr> Ctrl+R",
+undo: "Undo - Ctrl+Z",
+redo: "Redo - Ctrl+Y",
+redomac: "Redo - Ctrl+Shift+Z",
+help: "Markdown Editing Help"
+};
+// -------------------------------------------------------------------
+//  YOUR CHANGES GO HERE
+//
+// I've tried to localize the things you are likely to change to
+// this area.
+// -------------------------------------------------------------------
+// The default text that appears in the dialog input box when entering
+// links.
+var imageDefaultText = "http://";
+var linkDefaultText = "http://";
+// -------------------------------------------------------------------
+//  END OF YOUR CHANGES
+// -------------------------------------------------------------------
+// options, if given, can have the following properties:
+//   options.helpButton = { handler: yourEventHandler }
+//   options.strings = { italicexample: "slanted text" }
+// `yourEventHandler` is the click handler for the help button.
+// If `options.helpButton` isn't given, not help button is created.
+// `options.strings` can have any or all of the same properties as
+// `defaultStrings` above, so you can just override some string displayed
+// to the user on a case-by-case basis, or translate all strings to
+// a different language.
+//
+// For backwards compatibility reasons, the `options` argument can also
+// be just the `helpButton` object, and `strings.help` can also be set via
+// `helpButton.title`. This should be considered legacy.
+//
+// The constructed editor object has the methods:
+// - getConverter() returns the markdown converter object that was passed to the constructor
+// - run() actually starts the editor; should be called after all necessary plugins are registered. Calling this more than once is a no-op.
+// - refreshPreview() forces the preview to be updated. This method is only available after run() was called.
+Markdown.Editor = function (markdownConverter, idPostfix, options) {
+options = options || {};
+if (typeof options.handler === "function") { //backwards compatible behavior
+options = { helpButton: options };
+}
+options.strings = options.strings || {};
+if (options.helpButton) {
+options.strings.help = options.strings.help || options.helpButton.title;
+}
+var getString = function (identifier) { return options.strings[identifier] || defaultsStrings[identifier]; }
+idPostfix = idPostfix || "";
+var hooks = this.hooks = new Markdown.HookCollection();
+hooks.addNoop("onPreviewRefresh");       // called with no arguments after the preview has been refreshed
+hooks.addNoop("postBlockquoteCreation"); // called with the user's selection *after* the blockquote was created; should return the actual to-be-inserted text
+hooks.addFalse("insertImageDialog");     /* called with one parameter: a callback to be called with the URL of the image. If the application creates
+* its own image insertion dialog, this hook should return true, and the callback should be called with the chosen
+* image url (or null if the user cancelled). If this hook returns false, the default dialog will be used.
+*/
+this.getConverter = function () { return markdownConverter; }
+var that = this,
+panels;
+this.run = function () {
+if (panels)
+return; // already initialized
+panels = new PanelCollection(idPostfix);
+var commandManager = new CommandManager(hooks, getString);
+var previewManager = new PreviewManager(markdownConverter, panels, function () { hooks.onPreviewRefresh(); });
+var undoManager, uiManager;
+if (!/\?noundo/.test(doc.location.href)) {
+undoManager = new UndoManager(function () {
+previewManager.refresh();
+if (uiManager) // not available on the first call
+uiManager.setUndoRedoButtonStates();
+}, panels);
+this.textOperation = function (f) {
+undoManager.setCommandMode();
+f();
+that.refreshPreview();
+}
+}
+uiManager = new UIManager(idPostfix, panels, undoManager, previewManager, commandManager, options.helpButton, getString);
+uiManager.setUndoRedoButtonStates();
+var forceRefresh = that.refreshPreview = function () { previewManager.refresh(true); };
+forceRefresh();
+};
+}
+// before: contains all the text in the input box BEFORE the selection.
+// after: contains all the text in the input box AFTER the selection.
+function Chunks() { }
+// startRegex: a regular expression to find the start tag
+// endRegex: a regular expresssion to find the end tag
+Chunks.prototype.findTags = function (startRegex, endRegex) {
+var chunkObj = this;
+var regex;
+if (startRegex) {
+regex = util.extendRegExp(startRegex, "", "$");
+this.before = this.before.replace(regex,
+function (match) {
+chunkObj.startTag = chunkObj.startTag + match;
+return "";
+});
+regex = util.extendRegExp(startRegex, "^", "");
+this.selection = this.selection.replace(regex,
+function (match) {
+chunkObj.startTag = chunkObj.startTag + match;
+return "";
+});
+}
+if (endRegex) {
+regex = util.extendRegExp(endRegex, "", "$");
+this.selection = this.selection.replace(regex,
+function (match) {
+chunkObj.endTag = match + chunkObj.endTag;
+return "";
+});
+regex = util.extendRegExp(endRegex, "^", "");
+this.after = this.after.replace(regex,
+function (match) {
+chunkObj.endTag = match + chunkObj.endTag;
+return "";
+});
+}
+};
+// If remove is false, the whitespace is transferred
+// to the before/after regions.
+//
+// If remove is true, the whitespace disappears.
+Chunks.prototype.trimWhitespace = function (remove) {
+var beforeReplacer, afterReplacer, that = this;
+if (remove) {
+beforeReplacer = afterReplacer = "";
+} else {
+beforeReplacer = function (s) { that.before += s; return ""; }
+afterReplacer = function (s) { that.after = s + that.after; return ""; }
+}
+this.selection = this.selection.replace(/^(\s*)/, beforeReplacer).replace(/(\s*)$/, afterReplacer);
+};
+Chunks.prototype.skipLines = function (nLinesBefore, nLinesAfter, findExtraNewlines) {
+if (nLinesBefore === undefined) {
+nLinesBefore = 1;
+}
+if (nLinesAfter === undefined) {
+nLinesAfter = 1;
+}
+nLinesBefore++;
+nLinesAfter++;
+var regexText;
+var replacementText;
+// chrome bug ... documented at: http://meta.stackoverflow.com/questions/63307/blockquote-glitch-in-editor-in-chrome-6-and-7/65985#65985
+if (navigator.userAgent.match(/Chrome/)) {
+"X".match(/()./);
+}
+this.selection = this.selection.replace(/(^\n*)/, "");
+this.startTag = this.startTag + re.$1;
+this.selection = this.selection.replace(/(\n*$)/, "");
+this.endTag = this.endTag + re.$1;
+this.startTag = this.startTag.replace(/(^\n*)/, "");
+this.before = this.before + re.$1;
+this.endTag = this.endTag.replace(/(\n*$)/, "");
+this.after = this.after + re.$1;
+if (this.before) {
+regexText = replacementText = "";
+while (nLinesBefore--) {
+regexText += "\\n?";
+replacementText += "\n";
+}
+if (findExtraNewlines) {
+regexText = "\\n*";
+}
+this.before = this.before.replace(new re(regexText + "$", ""), replacementText);
+}
+if (this.after) {
+regexText = replacementText = "";
+while (nLinesAfter--) {
+regexText += "\\n?";
+replacementText += "\n";
+}
+if (findExtraNewlines) {
+regexText = "\\n*";
+}
+this.after = this.after.replace(new re(regexText, ""), replacementText);
+}
+};
+// end of Chunks
+// A collection of the important regions on the page.
+// Cached so we don't have to keep traversing the DOM.
+// Also holds ieCachedRange and ieCachedScrollTop, where necessary; working around
+// this issue:
+// Internet explorer has problems with CSS sprite buttons that use HTML
+// lists.  When you click on the background image "button", IE will
+// select the non-existent link text and discard the selection in the
+// textarea.  The solution to this is to cache the textarea selection
+// on the button's mousedown event and set a flag.  In the part of the
+// code where we need to grab the selection, we check for the flag
+// and, if it's set, use the cached area instead of querying the
+// textarea.
+//
+// This ONLY affects Internet Explorer (tested on versions 6, 7
+// and 8) and ONLY on button clicks.  Keyboard shortcuts work
+// normally since the focus never leaves the textarea.
+function PanelCollection(postfix) {
+this.buttonBar = doc.getElementById("wmd-button-bar" + postfix);
+this.preview = doc.getElementById("wmd-preview" + postfix);
+this.input = doc.getElementById("wmd-input" + postfix);
+};
+// Returns true if the DOM element is visible, false if it's hidden.
+// Checks if display is anything other than none.
+util.isVisible = function (elem) {
+if (window.getComputedStyle) {
+// Most browsers
+return window.getComputedStyle(elem, null).getPropertyValue("display") !== "none";
+}
+else if (elem.currentStyle) {
+// IE
+return elem.currentStyle["display"] !== "none";
+}
+};
+// Adds a listener callback to a DOM element which is fired on a specified
+// event.
+util.addEvent = function (elem, event, listener) {
+if (elem.attachEvent) {
+// IE only.  The "on" is mandatory.
+elem.attachEvent("on" + event, listener);
+}
+else {
+// Other browsers.
+elem.addEventListener(event, listener, false);
+}
+};
+// Removes a listener callback from a DOM element which is fired on a specified
+// event.
+util.removeEvent = function (elem, event, listener) {
+if (elem.detachEvent) {
+// IE only.  The "on" is mandatory.
+elem.detachEvent("on" + event, listener);
+}
+else {
+// Other browsers.
+elem.removeEventListener(event, listener, false);
+}
+};
+// Converts \r\n and \r to \n.
+util.fixEolChars = function (text) {
+text = text.replace(/\r\n/g, "\n");
+text = text.replace(/\r/g, "\n");
+return text;
+};
+// Extends a regular expression.  Returns a new RegExp
+// using pre + regex + post as the expression.
+// Used in a few functions where we have a base
+// expression and we want to pre- or append some
+// conditions to it (e.g. adding "$" to the end).
+// The flags are unchanged.
+//
+// regex is a RegExp, pre and post are strings.
+util.extendRegExp = function (regex, pre, post) {
+if (pre === null || pre === undefined) {
+pre = "";
+}
+if (post === null || post === undefined) {
+post = "";
+}
+var pattern = regex.toString();
+var flags;
+// Replace the flags with empty space and store them.
+pattern = pattern.replace(/\/([gim]*)$/, function (wholeMatch, flagsPart) {
+flags = flagsPart;
+return "";
+});
+// Remove the slash delimiters on the regular expression.
+pattern = pattern.replace(/(^\/|\/$)/g, "");
+pattern = pre + pattern + post;
+return new re(pattern, flags);
+}
+// UNFINISHED
+// The assignment in the while loop makes jslint cranky.
+// I'll change it to a better loop later.
+position.getTop = function (elem, isInner) {
+var result = elem.offsetTop;
+if (!isInner) {
+while (elem = elem.offsetParent) {
+result += elem.offsetTop;
+}
+}
+return result;
+};
+position.getHeight = function (elem) {
+return elem.offsetHeight || elem.scrollHeight;
+};
+position.getWidth = function (elem) {
+return elem.offsetWidth || elem.scrollWidth;
+};
+position.getPageSize = function () {
+var scrollWidth, scrollHeight;
+var innerWidth, innerHeight;
+// It's not very clear which blocks work with which browsers.
+if (self.innerHeight && self.scrollMaxY) {
+scrollWidth = doc.body.scrollWidth;
+scrollHeight = self.innerHeight + self.scrollMaxY;
+}
+else if (doc.body.scrollHeight > doc.body.offsetHeight) {
+scrollWidth = doc.body.scrollWidth;
+scrollHeight = doc.body.scrollHeight;
+}
+else {
+scrollWidth = doc.body.offsetWidth;
+scrollHeight = doc.body.offsetHeight;
+}
+if (self.innerHeight) {
+// Non-IE browser
+innerWidth = self.innerWidth;
+innerHeight = self.innerHeight;
+}
+else if (doc.documentElement && doc.documentElement.clientHeight) {
+// Some versions of IE (IE 6 w/ a DOCTYPE declaration)
+innerWidth = doc.documentElement.clientWidth;
+innerHeight = doc.documentElement.clientHeight;
+}
+else if (doc.body) {
+// Other versions of IE
+innerWidth = doc.body.clientWidth;
+innerHeight = doc.body.clientHeight;
+}
+var maxWidth = Math.max(scrollWidth, innerWidth);
+var maxHeight = Math.max(scrollHeight, innerHeight);
+return [maxWidth, maxHeight, innerWidth, innerHeight];
+};
+// Handles pushing and popping TextareaStates for undo/redo commands.
+// I should rename the stack variables to list.
+function UndoManager(callback, panels) {
+var undoObj = this;
+var undoStack = []; // A stack of undo states
+var stackPtr = 0; // The index of the current state
+var mode = "none";
+var lastState; // The last state
+var timer; // The setTimeout handle for cancelling the timer
+var inputStateObj;
+// Set the mode for later logic steps.
+var setMode = function (newMode, noSave) {
+if (mode != newMode) {
+mode = newMode;
+if (!noSave) {
+saveState();
+}
+}
+if (!uaSniffed.isIE || mode != "moving") {
+timer = setTimeout(refreshState, 1);
+}
+else {
+inputStateObj = null;
+}
+};
+var refreshState = function (isInitialState) {
+inputStateObj = new TextareaState(panels, isInitialState);
+timer = undefined;
+};
+this.setCommandMode = function () {
+mode = "command";
+saveState();
+timer = setTimeout(refreshState, 0);
+};
+this.canUndo = function () {
+return stackPtr > 1;
+};
+this.canRedo = function () {
+if (undoStack[stackPtr + 1]) {
+return true;
+}
+return false;
+};
+// Removes the last state and restores it.
+this.undo = function () {
+if (undoObj.canUndo()) {
+if (lastState) {
+// What about setting state -1 to null or checking for undefined?
+lastState.restore();
+lastState = null;
+}
+else {
+undoStack[stackPtr] = new TextareaState(panels);
+undoStack[--stackPtr].restore();
+if (callback) {
+callback();
+}
+}
+}
+mode = "none";
+panels.input.focus();
+refreshState();
+};
+// Redo an action.
+this.redo = function () {
+if (undoObj.canRedo()) {
+undoStack[++stackPtr].restore();
+if (callback) {
+callback();
+}
+}
+mode = "none";
+panels.input.focus();
+refreshState();
+};
+// Push the input area state to the stack.
+var saveState = function () {
+var currState = inputStateObj || new TextareaState(panels);
+if (!currState) {
+return false;
+}
+if (mode == "moving") {
+if (!lastState) {
+lastState = currState;
+}
+return;
+}
+if (lastState) {
+if (undoStack[stackPtr - 1].text != lastState.text) {
+undoStack[stackPtr++] = lastState;
+}
+lastState = null;
+}
+undoStack[stackPtr++] = currState;
+undoStack[stackPtr + 1] = null;
+if (callback) {
+callback();
+}
+};
+var handleCtrlYZ = function (event) {
+var handled = false;
+if (event.ctrlKey || event.metaKey) {
+// IE and Opera do not support charCode.
+var keyCode = event.charCode || event.keyCode;
+var keyCodeChar = String.fromCharCode(keyCode);
+switch (keyCodeChar.toLowerCase()) {
+case "y":
+undoObj.redo();
+handled = true;
+break;
+case "z":
+if (!event.shiftKey) {
+undoObj.undo();
+}
+else {
+undoObj.redo();
+}
+handled = true;
+break;
+}
+}
+if (handled) {
+if (event.preventDefault) {
+event.preventDefault();
+}
+if (window.event) {
+window.event.returnValue = false;
+}
+return;
+}
+};
+// Set the mode depending on what is going on in the input area.
+var handleModeChange = function (event) {
+if (!event.ctrlKey && !event.metaKey) {
+var keyCode = event.keyCode;
+if ((keyCode >= 33 && keyCode <= 40) || (keyCode >= 63232 && keyCode <= 63235)) {
+// 33 - 40: page up/dn and arrow keys
+// 63232 - 63235: page up/dn and arrow keys on safari
+setMode("moving");
+}
+else if (keyCode == 8 || keyCode == 46 || keyCode == 127) {
+// 8: backspace
+// 46: delete
+// 127: delete
+setMode("deleting");
+}
+else if (keyCode == 13) {
+// 13: Enter
+setMode("newlines");
+}
+else if (keyCode == 27) {
+// 27: escape
+setMode("escape");
+}
+else if ((keyCode < 16 || keyCode > 20) && keyCode != 91) {
+// 16-20 are shift, etc.
+// 91: left window key
+// I think this might be a little messed up since there are
+// a lot of nonprinting keys above 20.
+setMode("typing");
+}
+}
+};
+var setEventHandlers = function () {
+util.addEvent(panels.input, "keypress", function (event) {
+// keyCode 89: y
+// keyCode 90: z
+if ((event.ctrlKey || event.metaKey) && (event.keyCode == 89 || event.keyCode == 90)) {
+event.preventDefault();
+}
+});
+var handlePaste = function () {
+if (uaSniffed.isIE || (inputStateObj && inputStateObj.text != panels.input.value)) {
+if (timer == undefined) {
+mode = "paste";
+saveState();
+refreshState();
+}
+}
+};
+util.addEvent(panels.input, "keydown", handleCtrlYZ);
+util.addEvent(panels.input, "keydown", handleModeChange);
+util.addEvent(panels.input, "mousedown", function () {
+setMode("moving");
+});
+panels.input.onpaste = handlePaste;
+panels.input.ondrop = handlePaste;
+};
+var init = function () {
+setEventHandlers();
+refreshState(true);
+saveState();
+};
+init();
+}
+// end of UndoManager
+// The input textarea state/contents.
+// This is used to implement undo/redo by the undo manager.
+function TextareaState(panels, isInitialState) {
+// Aliases
+var stateObj = this;
+var inputArea = panels.input;
+this.init = function () {
+if (!util.isVisible(inputArea)) {
+return;
+}
+if (!isInitialState && doc.activeElement && doc.activeElement !== inputArea) { // this happens when tabbing out of the input box
+return;
+}
+this.setInputAreaSelectionStartEnd();
+this.scrollTop = inputArea.scrollTop;
+if (!this.text && inputArea.selectionStart || inputArea.selectionStart === 0) {
+this.text = inputArea.value;
+}
+}
+// Sets the selected text in the input box after we've performed an
+// operation.
+this.setInputAreaSelection = function () {
+if (!util.isVisible(inputArea)) {
+return;
+}
+if (inputArea.selectionStart !== undefined && !uaSniffed.isOpera) {
+inputArea.focus();
+inputArea.selectionStart = stateObj.start;
+inputArea.selectionEnd = stateObj.end;
+inputArea.scrollTop = stateObj.scrollTop;
+}
+else if (doc.selection) {
+if (doc.activeElement && doc.activeElement !== inputArea) {
+return;
+}
+inputArea.focus();
+var range = inputArea.createTextRange();
+range.moveStart("character", -inputArea.value.length);
+range.moveEnd("character", -inputArea.value.length);
+range.moveEnd("character", stateObj.end);
+range.moveStart("character", stateObj.start);
+range.select();
+}
+};
+this.setInputAreaSelectionStartEnd = function () {
+if (!panels.ieCachedRange && (inputArea.selectionStart || inputArea.selectionStart === 0)) {
+stateObj.start = inputArea.selectionStart;
+stateObj.end = inputArea.selectionEnd;
+}
+else if (doc.selection) {
+stateObj.text = util.fixEolChars(inputArea.value);
+// IE loses the selection in the textarea when buttons are
+// clicked.  On IE we cache the selection. Here, if something is cached,
+// we take it.
+var range = panels.ieCachedRange || doc.selection.createRange();
+var fixedRange = util.fixEolChars(range.text);
+var marker = "\x07";
+var markedRange = marker + fixedRange + marker;
+range.text = markedRange;
+var inputText = util.fixEolChars(inputArea.value);
+range.moveStart("character", -markedRange.length);
+range.text = fixedRange;
+stateObj.start = inputText.indexOf(marker);
+stateObj.end = inputText.lastIndexOf(marker) - marker.length;
+var len = stateObj.text.length - util.fixEolChars(inputArea.value).length;
+if (len) {
+range.moveStart("character", -fixedRange.length);
+while (len--) {
+fixedRange += "\n";
+stateObj.end += 1;
+}
+range.text = fixedRange;
+}
+if (panels.ieCachedRange)
+stateObj.scrollTop = panels.ieCachedScrollTop; // this is set alongside with ieCachedRange
+panels.ieCachedRange = null;
+this.setInputAreaSelection();
+}
+};
+// Restore this state into the input area.
+this.restore = function () {
+if (stateObj.text != undefined && stateObj.text != inputArea.value) {
+inputArea.value = stateObj.text;
+}
+this.setInputAreaSelection();
+inputArea.scrollTop = stateObj.scrollTop;
+};
+// Gets a collection of HTML chunks from the inptut textarea.
+this.getChunks = function () {
+var chunk = new Chunks();
+chunk.before = util.fixEolChars(stateObj.text.substring(0, stateObj.start));
+chunk.startTag = "";
+chunk.selection = util.fixEolChars(stateObj.text.substring(stateObj.start, stateObj.end));
+chunk.endTag = "";
+chunk.after = util.fixEolChars(stateObj.text.substring(stateObj.end));
+chunk.scrollTop = stateObj.scrollTop;
+return chunk;
+};
+// Sets the TextareaState properties given a chunk of markdown.
+this.setChunks = function (chunk) {
+chunk.before = chunk.before + chunk.startTag;
+chunk.after = chunk.endTag + chunk.after;
+this.start = chunk.before.length;
+this.end = chunk.before.length + chunk.selection.length;
+this.text = chunk.before + chunk.selection + chunk.after;
+this.scrollTop = chunk.scrollTop;
+};
+this.init();
+};
+function PreviewManager(converter, panels, previewRefreshCallback) {
+var managerObj = this;
+var timeout;
+var elapsedTime;
+var oldInputText;
+var maxDelay = 3000;
+var startType = "delayed"; // The other legal value is "manual"
+// Adds event listeners to elements
+var setupEvents = function (inputElem, listener) {
+util.addEvent(inputElem, "input", listener);
+inputElem.onpaste = listener;
+inputElem.ondrop = listener;
+util.addEvent(inputElem, "keypress", listener);
+util.addEvent(inputElem, "keydown", listener);
+};
+var getDocScrollTop = function () {
+var result = 0;
+if (window.innerHeight) {
+result = window.pageYOffset;
+}
+else
+if (doc.documentElement && doc.documentElement.scrollTop) {
+result = doc.documentElement.scrollTop;
+}
+else
+if (doc.body) {
+result = doc.body.scrollTop;
+}
+return result;
+};
+var makePreviewHtml = function () {
+// If there is no registered preview panel
+// there is nothing to do.
+if (!panels.preview)
+return;
+var text = panels.input.value;
+if (text && text == oldInputText) {
+return; // Input text hasn't changed.
+}
+else {
+oldInputText = text;
+}
+var prevTime = new Date().getTime();
+text = converter.makeHtml(text);
+// Calculate the processing time of the HTML creation.
+// It's used as the delay time in the event listener.
+var currTime = new Date().getTime();
+elapsedTime = currTime - prevTime;
+pushPreviewHtml(text);
+};
+// setTimeout is already used.  Used as an event listener.
+var applyTimeout = function () {
+if (timeout) {
+clearTimeout(timeout);
+timeout = undefined;
+}
+if (startType !== "manual") {
+var delay = 0;
+if (startType === "delayed") {
+delay = elapsedTime;
+}
+if (delay > maxDelay) {
+delay = maxDelay;
+}
+timeout = setTimeout(makePreviewHtml, delay);
+}
+};
+var getScaleFactor = function (panel) {
+if (panel.scrollHeight <= panel.clientHeight) {
+return 1;
+}
+return panel.scrollTop / (panel.scrollHeight - panel.clientHeight);
+};
+var setPanelScrollTops = function () {
+if (panels.preview) {
+panels.preview.scrollTop = (panels.preview.scrollHeight - panels.preview.clientHeight) * getScaleFactor(panels.preview);
+}
+};
+this.refresh = function (requiresRefresh) {
+if (requiresRefresh) {
+oldInputText = "";
+makePreviewHtml();
+}
+else {
+applyTimeout();
+}
+};
+this.processingTime = function () {
+return elapsedTime;
+};
+var isFirstTimeFilled = true;
+// IE doesn't let you use innerHTML if the element is contained somewhere in a table
+// (which is the case for inline editing) -- in that case, detach the element, set the
+// value, and reattach. Yes, that *is* ridiculous.
+var ieSafePreviewSet = function (text) {
+var preview = panels.preview;
+var parent = preview.parentNode;
+var sibling = preview.nextSibling;
+parent.removeChild(preview);
+preview.innerHTML = text;
+if (!sibling)
+parent.appendChild(preview);
+else
+parent.insertBefore(preview, sibling);
+}
+var nonSuckyBrowserPreviewSet = function (text) {
+panels.preview.innerHTML = text;
+}
+var previewSetter;
+var previewSet = function (text) {
+if (previewSetter)
+return previewSetter(text);
+try {
+nonSuckyBrowserPreviewSet(text);
+previewSetter = nonSuckyBrowserPreviewSet;
+} catch (e) {
+previewSetter = ieSafePreviewSet;
+previewSetter(text);
+}
+};
+var pushPreviewHtml = function (text) {
+var emptyTop = position.getTop(panels.input) - getDocScrollTop();
+if (panels.preview) {
+previewSet(text);
+previewRefreshCallback();
+}
+setPanelScrollTops();
+if (isFirstTimeFilled) {
+isFirstTimeFilled = false;
+return;
+}
+var fullTop = position.getTop(panels.input) - getDocScrollTop();
+if (uaSniffed.isIE) {
+setTimeout(function () {
+window.scrollBy(0, fullTop - emptyTop);
+}, 0);
+}
+else {
+window.scrollBy(0, fullTop - emptyTop);
+}
+};
+var init = function () {
+setupEvents(panels.input, applyTimeout);
+makePreviewHtml();
+if (panels.preview) {
+panels.preview.scrollTop = 0;
+}
+};
+init();
+};
+// Creates the background behind the hyperlink text entry box.
+// And download dialog
+// Most of this has been moved to CSS but the div creation and
+// browser-specific hacks remain here.
+ui.createBackground = function () {
+var background = doc.createElement("div"),
+style = background.style;
+background.className = "wmd-prompt-background";
+style.position = "absolute";
+style.top = "0";
+style.zIndex = "1000";
+if (uaSniffed.isIE) {
+style.filter = "alpha(opacity=50)";
+}
+else {
+style.opacity = "0.5";
+}
+var pageSize = position.getPageSize();
+style.height = pageSize[1] + "px";
+if (uaSniffed.isIE) {
+style.left = doc.documentElement.scrollLeft;
+style.width = doc.documentElement.clientWidth;
+}
+else {
+style.left = "0";
+style.width = "100%";
+}
+doc.body.appendChild(background);
+return background;
+};
+// This simulates a modal dialog box and asks for the URL when you
+// click the hyperlink or image buttons.
+//
+// text: The html for the input box.
+// defaultInputText: The default value that appears in the input box.
+// callback: The function which is executed when the prompt is dismissed, either via OK or Cancel.
+//      It receives a single argument; either the entered text (if OK was chosen) or null (if Cancel
+//      was chosen).
+ui.prompt = function (text, defaultInputText, callback) {
+// These variables need to be declared at this level since they are used
+// in multiple functions.
+var dialog;         // The dialog box.
+var input;         // The text box where you enter the hyperlink.
+if (defaultInputText === undefined) {
+defaultInputText = "";
+}
+// Used as a keydown event handler. Esc dismisses the prompt.
+// Key code 27 is ESC.
+var checkEscape = function (key) {
+var code = (key.charCode || key.keyCode);
+if (code === 27) {
+close(true);
+}
+};
+// Dismisses the hyperlink input box.
+// isCancel is true if we don't care about the input text.
+// isCancel is false if we are going to keep the text.
+var close = function (isCancel) {
+util.removeEvent(doc.body, "keydown", checkEscape);
+var text = input.value;
+if (isCancel) {
+text = null;
+}
+else {
+// Fixes common pasting errors.
+text = text.replace(/^http:\/\/(https?|ftp):\/\//, '$1://');
+if (!/^(?:https?|ftp):\/\//.test(text))
+text = 'http://' + text;
+}
+dialog.parentNode.removeChild(dialog);
+callback(text);
+return false;
+};
+// Create the text input box form/window.
+var createDialog = function () {
+// The main dialog box.
+dialog = doc.createElement("div");
+dialog.className = "wmd-prompt-dialog";
+dialog.style.padding = "10px;";
+dialog.style.position = "fixed";
+dialog.style.width = "400px";
+dialog.style.zIndex = "1001";
+// The dialog text.
+var question = doc.createElement("div");
+question.innerHTML = text;
+question.style.padding = "5px";
+dialog.appendChild(question);
+// The web form container for the text box and buttons.
+var form = doc.createElement("form"),
+style = form.style;
+form.onsubmit = function () { return close(false); };
+style.padding = "0";
+style.margin = "0";
+style.cssFloat = "left";
+style.width = "100%";
+style.textAlign = "center";
+style.position = "relative";
+dialog.appendChild(form);
+// The input text box
+input = doc.createElement("input");
+input.type = "text";
+input.value = defaultInputText;
+style = input.style;
+style.display = "block";
+style.width = "80%";
+style.marginLeft = style.marginRight = "auto";
+form.appendChild(input);
+// The ok button
+var okButton = doc.createElement("input");
+okButton.type = "button";
+okButton.onclick = function () { return close(false); };
+okButton.value = "OK";
+style = okButton.style;
+style.margin = "10px";
+style.display = "inline";
+style.width = "7em";
+// The cancel button
+var cancelButton = doc.createElement("input");
+cancelButton.type = "button";
+cancelButton.onclick = function () { return close(true); };
+cancelButton.value = "Cancel";
+style = cancelButton.style;
+style.margin = "10px";
+style.display = "inline";
+style.width = "7em";
+form.appendChild(okButton);
+form.appendChild(cancelButton);
+util.addEvent(doc.body, "keydown", checkEscape);
+dialog.style.top = "50%";
+dialog.style.left = "50%";
+dialog.style.display = "block";
+if (uaSniffed.isIE_5or6) {
+dialog.style.position = "absolute";
+dialog.style.top = doc.documentElement.scrollTop + 200 + "px";
+dialog.style.left = "50%";
+}
+doc.body.appendChild(dialog);
+// This has to be done AFTER adding the dialog to the form if you
+// want it to be centered.
+dialog.style.marginTop = -(position.getHeight(dialog) / 2) + "px";
+dialog.style.marginLeft = -(position.getWidth(dialog) / 2) + "px";
+};
+// Why is this in a zero-length timeout?
+// Is it working around a browser bug?
+setTimeout(function () {
+createDialog();
+var defTextLen = defaultInputText.length;
+if (input.selectionStart !== undefined) {
+input.selectionStart = 0;
+input.selectionEnd = defTextLen;
+}
+else if (input.createTextRange) {
+var range = input.createTextRange();
+range.collapse(false);
+range.moveStart("character", -defTextLen);
+range.moveEnd("character", defTextLen);
+range.select();
+}
+input.focus();
+}, 0);
+};
+function UIManager(postfix, panels, undoManager, previewManager, commandManager, helpOptions, getString) {
+var inputBox = panels.input,
+buttons = {}; // buttons.undo, buttons.link, etc. The actual DOM elements.
+makeSpritedButtonRow();
+var keyEvent = "keydown";
+if (uaSniffed.isOpera) {
+keyEvent = "keypress";
+}
+util.addEvent(inputBox, keyEvent, function (key) {
+// Check to see if we have a button key and, if so execute the callback.
+if ((key.ctrlKey || key.metaKey) && !key.altKey && !key.shiftKey) {
+var keyCode = key.charCode || key.keyCode;
+var keyCodeStr = String.fromCharCode(keyCode).toLowerCase();
+switch (keyCodeStr) {
+case "b":
+doClick(buttons.bold);
+break;
+case "i":
+doClick(buttons.italic);
+break;
+case "l":
+doClick(buttons.link);
+break;
+case "q":
+doClick(buttons.quote);
+break;
+case "k":
+doClick(buttons.code);
+break;
+case "g":
+doClick(buttons.image);
+break;
+case "o":
+doClick(buttons.olist);
+break;
+case "u":
+doClick(buttons.ulist);
+break;
+case "h":
+doClick(buttons.heading);
+break;
+case "r":
+doClick(buttons.hr);
+break;
+case "y":
+doClick(buttons.redo);
+break;
+case "z":
+if (key.shiftKey) {
+doClick(buttons.redo);
+}
+else {
+doClick(buttons.undo);
+}
+break;
+default:
+return;
+}
+if (key.preventDefault) {
+key.preventDefault();
+}
+if (window.event) {
+window.event.returnValue = false;
+}
+}
+});
+// Auto-indent on shift-enter
+util.addEvent(inputBox, "keyup", function (key) {
+if (key.shiftKey && !key.ctrlKey && !key.metaKey) {
+var keyCode = key.charCode || key.keyCode;
+// Character 13 is Enter
+if (keyCode === 13) {
+var fakeButton = {};
+fakeButton.textOp = bindCommand("doAutoindent");
+doClick(fakeButton);
+}
+}
+});
+// special handler because IE clears the context of the textbox on ESC
+if (uaSniffed.isIE) {
+util.addEvent(inputBox, "keydown", function (key) {
+var code = key.keyCode;
+if (code === 27) {
+return false;
+}
+});
+}
+// Perform the button's action.
+function doClick(button) {
+inputBox.focus();
+if (button.textOp) {
+if (undoManager) {
+undoManager.setCommandMode();
+}
+var state = new TextareaState(panels);
+if (!state) {
+return;
+}
+var chunks = state.getChunks();
+// Some commands launch a "modal" prompt dialog.  Javascript
+// can't really make a modal dialog box and the WMD code
+// will continue to execute while the dialog is displayed.
+// This prevents the dialog pattern I'm used to and means
+// I can't do something like this:
+//
+// var link = CreateLinkDialog();
+// makeMarkdownLink(link);
+//
+// Instead of this straightforward method of handling a
+// dialog I have to pass any code which would execute
+// after the dialog is dismissed (e.g. link creation)
+// in a function parameter.
+//
+// Yes this is awkward and I think it sucks, but there's
+// no real workaround.  Only the image and link code
+// create dialogs and require the function pointers.
+var fixupInputArea = function () {
+inputBox.focus();
+if (chunks) {
+state.setChunks(chunks);
+}
+state.restore();
+previewManager.refresh();
+};
+var noCleanup = button.textOp(chunks, fixupInputArea);
+if (!noCleanup) {
+fixupInputArea();
+}
+}
+if (button.execute) {
+button.execute(undoManager);
+}
+};
+function setupButton(button, isEnabled) {
+var normalYShift = "0px";
+var disabledYShift = "-20px";
+var highlightYShift = "-40px";
+var image = button.getElementsByTagName("span")[0];
+if (isEnabled) {
+image.style.backgroundPosition = button.XShift + " " + normalYShift;
+button.onmouseover = function () {
+image.style.backgroundPosition = this.XShift + " " + highlightYShift;
+};
+button.onmouseout = function () {
+image.style.backgroundPosition = this.XShift + " " + normalYShift;
+};
+// IE tries to select the background image "button" text (it's
+// implemented in a list item) so we have to cache the selection
+// on mousedown.
+if (uaSniffed.isIE) {
+button.onmousedown = function () {
+if (doc.activeElement && doc.activeElement !== panels.input) { // we're not even in the input box, so there's no selection
+return;
+}
+panels.ieCachedRange = document.selection.createRange();
+panels.ieCachedScrollTop = panels.input.scrollTop;
+};
+}
+if (!button.isHelp) {
+button.onclick = function () {
+if (this.onmouseout) {
+this.onmouseout();
+}
+doClick(this);
+return false;
+}
+}
+}
+else {
+image.style.backgroundPosition = button.XShift + " " + disabledYShift;
+button.onmouseover = button.onmouseout = button.onclick = function () { };
+}
+}
+function bindCommand(method) {
+if (typeof method === "string")
+method = commandManager[method];
+return function () { method.apply(commandManager, arguments); }
+}
+function makeSpritedButtonRow() {
+var buttonBar = panels.buttonBar;
+var normalYShift = "0px";
+var disabledYShift = "-20px";
+var highlightYShift = "-40px";
+var buttonRow = document.createElement("ul");
+buttonRow.id = "wmd-button-row" + postfix;
+buttonRow.className = 'wmd-button-row';
+buttonRow = buttonBar.appendChild(buttonRow);
+var xPosition = 0;
+var makeButton = function (id, title, XShift, textOp) {
+var button = document.createElement("li");
+button.className = "wmd-button";
+button.style.left = xPosition + "px";
+xPosition += 25;
+var buttonImage = document.createElement("span");
+button.id = id + postfix;
+button.appendChild(buttonImage);
+button.title = title;
+button.XShift = XShift;
+if (textOp)
+button.textOp = textOp;
+setupButton(button, true);
+buttonRow.appendChild(button);
+return button;
+};
+var makeSpacer = function (num) {
+var spacer = document.createElement("li");
+spacer.className = "wmd-spacer wmd-spacer" + num;
+spacer.id = "wmd-spacer" + num + postfix;
+buttonRow.appendChild(spacer);
+xPosition += 25;
+}
+buttons.bold = makeButton("wmd-bold-button", getString("bold"), "0px", bindCommand("doBold"));
+buttons.italic = makeButton("wmd-italic-button", getString("italic"), "-20px", bindCommand("doItalic"));
+makeSpacer(1);
+buttons.link = makeButton("wmd-link-button", getString("link"), "-40px", bindCommand(function (chunk, postProcessing) {
+return this.doLinkOrImage(chunk, postProcessing, false);
+}));
+buttons.quote = makeButton("wmd-quote-button", getString("quote"), "-60px", bindCommand("doBlockquote"));
+buttons.code = makeButton("wmd-code-button", getString("code"), "-80px", bindCommand("doCode"));
+buttons.image = makeButton("wmd-image-button", getString("image"), "-100px", bindCommand(function (chunk, postProcessing) {
+return this.doLinkOrImage(chunk, postProcessing, true);
+}));
+makeSpacer(2);
+buttons.olist = makeButton("wmd-olist-button", getString("olist"), "-120px", bindCommand(function (chunk, postProcessing) {
+this.doList(chunk, postProcessing, true);
+}));
+buttons.ulist = makeButton("wmd-ulist-button", getString("ulist"), "-140px", bindCommand(function (chunk, postProcessing) {
+this.doList(chunk, postProcessing, false);
+}));
+buttons.heading = makeButton("wmd-heading-button", getString("heading"), "-160px", bindCommand("doHeading"));
+buttons.hr = makeButton("wmd-hr-button", getString("hr"), "-180px", bindCommand("doHorizontalRule"));
+makeSpacer(3);
+buttons.undo = makeButton("wmd-undo-button", getString("undo"), "-200px", null);
+buttons.undo.execute = function (manager) { if (manager) manager.undo(); };
+var redoTitle = /win/.test(nav.platform.toLowerCase()) ?
+getString("redo") :
+getString("redomac"); // mac and other non-Windows platforms
+buttons.redo = makeButton("wmd-redo-button", redoTitle, "-220px", null);
+buttons.redo.execute = function (manager) { if (manager) manager.redo(); };
+if (helpOptions) {
+var helpButton = document.createElement("li");
+var helpButtonImage = document.createElement("span");
+helpButton.appendChild(helpButtonImage);
+helpButton.className = "wmd-button wmd-help-button";
+helpButton.id = "wmd-help-button" + postfix;
+helpButton.XShift = "-240px";
+helpButton.isHelp = true;
+helpButton.style.right = "0px";
+helpButton.title = getString("help");
+helpButton.onclick = helpOptions.handler;
+setupButton(helpButton, true);
+buttonRow.appendChild(helpButton);
+buttons.help = helpButton;
+}
+setUndoRedoButtonStates();
+}
+function setUndoRedoButtonStates() {
+if (undoManager) {
+setupButton(buttons.undo, undoManager.canUndo());
+setupButton(buttons.redo, undoManager.canRedo());
+}
+};
+this.setUndoRedoButtonStates = setUndoRedoButtonStates;
+}
+function CommandManager(pluginHooks, getString) {
+this.hooks = pluginHooks;
+this.getString = getString;
+}
+var commandProto = CommandManager.prototype;
+// The markdown symbols - 4 spaces = code, > = blockquote, etc.
+commandProto.prefixes = "(?:\\s{4,}|\\s*>|\\s*-\\s+|\\s*\\d+\\.|=|\\+|-|_|\\*|#|\\s*\\[[^\n]]+\\]:)";
+// Remove markdown symbols from the chunk selection.
+commandProto.unwrap = function (chunk) {
+var txt = new re("([^\\n])\\n(?!(\\n|" + this.prefixes + "))", "g");
+chunk.selection = chunk.selection.replace(txt, "$1 $2");
+};
+commandProto.wrap = function (chunk, len) {
+this.unwrap(chunk);
+var regex = new re("(.{1," + len + "})( +|$\\n?)", "gm"),
+that = this;
+chunk.selection = chunk.selection.replace(regex, function (line, marked) {
+if (new re("^" + that.prefixes, "").test(line)) {
+return line;
+}
+return marked + "\n";
+});
+chunk.selection = chunk.selection.replace(/\s+$/, "");
+};
+commandProto.doBold = function (chunk, postProcessing) {
+return this.doBorI(chunk, postProcessing, 2, this.getString("boldexample"));
+};
+commandProto.doItalic = function (chunk, postProcessing) {
+return this.doBorI(chunk, postProcessing, 1, this.getString("italicexample"));
+};
+// chunk: The selected region that will be enclosed with */**
+// nStars: 1 for italics, 2 for bold
+// insertText: If you just click the button without highlighting text, this gets inserted
+commandProto.doBorI = function (chunk, postProcessing, nStars, insertText) {
+// Get rid of whitespace and fixup newlines.
+chunk.trimWhitespace();
+chunk.selection = chunk.selection.replace(/\n{2,}/g, "\n");
+// Look for stars before and after.  Is the chunk already marked up?
+// note that these regex matches cannot fail
+var starsBefore = /(\**$)/.exec(chunk.before)[0];
+var starsAfter = /(^\**)/.exec(chunk.after)[0];
+var prevStars = Math.min(starsBefore.length, starsAfter.length);
+// Remove stars if we have to since the button acts as a toggle.
+if ((prevStars >= nStars) && (prevStars != 2 || nStars != 1)) {
+chunk.before = chunk.before.replace(re("[*]{" + nStars + "}$", ""), "");
+chunk.after = chunk.after.replace(re("^[*]{" + nStars + "}", ""), "");
+}
+else if (!chunk.selection && starsAfter) {
+// It's not really clear why this code is necessary.  It just moves
+// some arbitrary stuff around.
+chunk.after = chunk.after.replace(/^([*_]*)/, "");
+chunk.before = chunk.before.replace(/(\s?)$/, "");
+var whitespace = re.$1;
+chunk.before = chunk.before + starsAfter + whitespace;
+}
+else {
+// In most cases, if you don't have any selected text and click the button
+// you'll get a selected, marked up region with the default text inserted.
+if (!chunk.selection && !starsAfter) {
+chunk.selection = insertText;
+}
+// Add the true markup.
+var markup = nStars <= 1 ? "*" : "**"; // shouldn't the test be = ?
+chunk.before = chunk.before + markup;
+chunk.after = markup + chunk.after;
+}
+return;
+};
+commandProto.stripLinkDefs = function (text, defsToAdd) {
+text = text.replace(/^[ ]{0,3}\[(\d+)\]:[ \t]*\n?[ \t]*<?(\S+?)>?[ \t]*\n?[ \t]*(?:(\n*)["(](.+?)[")][ \t]*)?(?:\n+|$)/gm,
+function (totalMatch, id, link, newlines, title) {
+defsToAdd[id] = totalMatch.replace(/\s*$/, "");
+if (newlines) {
+// Strip the title and return that separately.
+defsToAdd[id] = totalMatch.replace(/["(](.+?)[")]$/, "");
+return newlines + title;
+}
+return "";
+});
+return text;
+};
+commandProto.addLinkDef = function (chunk, linkDef) {
+var refNumber = 0; // The current reference number
+var defsToAdd = {}; //
+// Start with a clean slate by removing all previous link definitions.
+chunk.before = this.stripLinkDefs(chunk.before, defsToAdd);
+chunk.selection = this.stripLinkDefs(chunk.selection, defsToAdd);
+chunk.after = this.stripLinkDefs(chunk.after, defsToAdd);
+var defs = "";
+var regex = /(\[)((?:\[[^\]]*\]|[^\[\]])*)(\][ ]?(?:\n[ ]*)?\[)(\d+)(\])/g;
+var addDefNumber = function (def) {
+refNumber++;
+def = def.replace(/^[ ]{0,3}\[(\d+)\]:/, "  [" + refNumber + "]:");
+defs += "\n" + def;
+};
+// note that
+// a) the recursive call to getLink cannot go infinite, because by definition
+//    of regex, inner is always a proper substring of wholeMatch, and
+// b) more than one level of nesting is neither supported by the regex
+//    nor making a lot of sense (the only use case for nesting is a linked image)
+var getLink = function (wholeMatch, before, inner, afterInner, id, end) {
+inner = inner.replace(regex, getLink);
+if (defsToAdd[id]) {
+addDefNumber(defsToAdd[id]);
+return before + inner + afterInner + refNumber + end;
+}
+return wholeMatch;
+};
+chunk.before = chunk.before.replace(regex, getLink);
+if (linkDef) {
+addDefNumber(linkDef);
+}
+else {
+chunk.selection = chunk.selection.replace(regex, getLink);
+}
+var refOut = refNumber;
+chunk.after = chunk.after.replace(regex, getLink);
+if (chunk.after) {
+chunk.after = chunk.after.replace(/\n*$/, "");
+}
+if (!chunk.after) {
+chunk.selection = chunk.selection.replace(/\n*$/, "");
+}
+chunk.after += "\n\n" + defs;
+return refOut;
+};
+// takes the line as entered into the add link/as image dialog and makes
+// sure the URL and the optinal title are "nice".
+function properlyEncoded(linkdef) {
+return linkdef.replace(/^\s*(.*?)(?:\s+"(.+)")?\s*$/, function (wholematch, link, title) {
+link = link.replace(/\?.*$/, function (querypart) {
+return querypart.replace(/\+/g, " "); // in the query string, a plus and a space are identical
+});
+link = decodeURIComponent(link); // unencode first, to prevent double encoding
+link = encodeURI(link).replace(/'/g, '%27').replace(/\(/g, '%28').replace(/\)/g, '%29');
+link = link.replace(/\?.*$/, function (querypart) {
+return querypart.replace(/\+/g, "%2b"); // since we replaced plus with spaces in the query part, all pluses that now appear where originally encoded
+});
+if (title) {
+title = title.trim ? title.trim() : title.replace(/^\s*/, "").replace(/\s*$/, "");
+title = title.replace(/"/g, "quot;").replace(/\(/g, "&#40;").replace(/\)/g, "&#41;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
+}
+return title ? link + ' "' + title + '"' : link;
+});
+}
+commandProto.doLinkOrImage = function (chunk, postProcessing, isImage) {
+chunk.trimWhitespace();
+chunk.findTags(/\s*!?\[/, /\][ ]?(?:\n[ ]*)?(\[.*?\])?/);
+var background;
+if (chunk.endTag.length > 1 && chunk.startTag.length > 0) {
+chunk.startTag = chunk.startTag.replace(/!?\[/, "");
+chunk.endTag = "";
+this.addLinkDef(chunk, null);
+}
+else {
+// We're moving start and end tag back into the selection, since (as we're in the else block) we're not
+// *removing* a link, but *adding* one, so whatever findTags() found is now back to being part of the
+// link text. linkEnteredCallback takes care of escaping any brackets.
+chunk.selection = chunk.startTag + chunk.selection + chunk.endTag;
+chunk.startTag = chunk.endTag = "";
+if (/\n\n/.test(chunk.selection)) {
+this.addLinkDef(chunk, null);
+return;
+}
+var that = this;
+// The function to be executed when you enter a link and press OK or Cancel.
+// Marks up the link and adds the ref.
+var linkEnteredCallback = function (link) {
+background.parentNode.removeChild(background);
+if (link !== null) {
+// (                          $1
+//     [^\\]                  anything that's not a backslash
+//     (?:\\\\)*              an even number (this includes zero) of backslashes
+// )
+// (?=                        followed by
+//     [[\]]                  an opening or closing bracket
+// )
+//
+// In other words, a non-escaped bracket. These have to be escaped now to make sure they
+// don't count as the end of the link or similar.
+// Note that the actual bracket has to be a lookahead, because (in case of to subsequent brackets),
+// the bracket in one match may be the "not a backslash" character in the next match, so it
+// should not be consumed by the first match.
+// The "prepend a space and finally remove it" steps makes sure there is a "not a backslash" at the
+// start of the string, so this also works if the selection begins with a bracket. We cannot solve
+// this by anchoring with ^, because in the case that the selection starts with two brackets, this
+// would mean a zero-width match at the start. Since zero-width matches advance the string position,
+// the first bracket could then not act as the "not a backslash" for the second.
+chunk.selection = (" " + chunk.selection).replace(/([^\\](?:\\\\)*)(?=[[\]])/g, "$1\\").substr(1);
+var linkDef = " [999]: " + properlyEncoded(link);
+var num = that.addLinkDef(chunk, linkDef);
+chunk.startTag = isImage ? "![" : "[";
+chunk.endTag = "][" + num + "]";
+if (!chunk.selection) {
+if (isImage) {
+chunk.selection = that.getString("imagedescription");
+}
+else {
+chunk.selection = that.getString("linkdescription");
+}
+}
+}
+postProcessing();
+};
+background = ui.createBackground();
+if (isImage) {
+if (!this.hooks.insertImageDialog(linkEnteredCallback))
+ui.prompt(this.getString("imagedialog"), imageDefaultText, linkEnteredCallback);
+}
+else {
+ui.prompt(this.getString("linkdialog"), linkDefaultText, linkEnteredCallback);
+}
+return true;
+}
+};
+// When making a list, hitting shift-enter will put your cursor on the next line
+// at the current indent level.
+commandProto.doAutoindent = function (chunk, postProcessing) {
+var commandMgr = this,
+fakeSelection = false;
+chunk.before = chunk.before.replace(/(\n|^)[ ]{0,3}([*+-]|\d+[.])[ \t]*\n$/, "\n\n");
+chunk.before = chunk.before.replace(/(\n|^)[ ]{0,3}>[ \t]*\n$/, "\n\n");
+chunk.before = chunk.before.replace(/(\n|^)[ \t]+\n$/, "\n\n");
+// There's no selection, end the cursor wasn't at the end of the line:
+// The user wants to split the current list item / code line / blockquote line
+// (for the latter it doesn't really matter) in two. Temporarily select the
+// (rest of the) line to achieve this.
+if (!chunk.selection && !/^[ \t]*(?:\n|$)/.test(chunk.after)) {
+chunk.after = chunk.after.replace(/^[^\n]*/, function (wholeMatch) {
+chunk.selection = wholeMatch;
+return "";
+});
+fakeSelection = true;
+}
+if (/(\n|^)[ ]{0,3}([*+-]|\d+[.])[ \t]+.*\n$/.test(chunk.before)) {
+if (commandMgr.doList) {
+commandMgr.doList(chunk);
+}
+}
+if (/(\n|^)[ ]{0,3}>[ \t]+.*\n$/.test(chunk.before)) {
+if (commandMgr.doBlockquote) {
+commandMgr.doBlockquote(chunk);
+}
+}
+if (/(\n|^)(\t|[ ]{4,}).*\n$/.test(chunk.before)) {
+if (commandMgr.doCode) {
+commandMgr.doCode(chunk);
+}
+}
+if (fakeSelection) {
+chunk.after = chunk.selection + chunk.after;
+chunk.selection = "";
+}
+};
+commandProto.doBlockquote = function (chunk, postProcessing) {
+chunk.selection = chunk.selection.replace(/^(\n*)([^\r]+?)(\n*)$/,
+function (totalMatch, newlinesBefore, text, newlinesAfter) {
+chunk.before += newlinesBefore;
+chunk.after = newlinesAfter + chunk.after;
+return text;
+});
+chunk.before = chunk.before.replace(/(>[ \t]*)$/,
+function (totalMatch, blankLine) {
+chunk.selection = blankLine + chunk.selection;
+return "";
+});
+chunk.selection = chunk.selection.replace(/^(\s|>)+$/, "");
+chunk.selection = chunk.selection || this.getString("quoteexample");
+// The original code uses a regular expression to find out how much of the
+// text *directly before* the selection already was a blockquote:
+/*
+if (chunk.before) {
+chunk.before = chunk.before.replace(/\n?$/, "\n");
+}
+chunk.before = chunk.before.replace(/(((\n|^)(\n[ \t]*)*>(.+\n)*.*)+(\n[ \t]*)*$)/,
+function (totalMatch) {
+chunk.startTag = totalMatch;
+return "";
+});
+*/
+// This comes down to:
+// Go backwards as many lines a possible, such that each line
+//  a) starts with ">", or
+//  b) is almost empty, except for whitespace, or
+//  c) is preceeded by an unbroken chain of non-empty lines
+//     leading up to a line that starts with ">" and at least one more character
+// and in addition
+//  d) at least one line fulfills a)
+//
+// Since this is essentially a backwards-moving regex, it's susceptible to
+// catstrophic backtracking and can cause the browser to hang;
+// see e.g. http://meta.stackoverflow.com/questions/9807.
+//
+// Hence we replaced this by a simple state machine that just goes through the
+// lines and checks for a), b), and c).
+var match = "",
+leftOver = "",
+line;
+if (chunk.before) {
+var lines = chunk.before.replace(/\n$/, "").split("\n");
+var inChain = false;
+for (var i = 0; i < lines.length; i++) {
+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]*$/.test(line)) {   // b)
+good = true;
+} else {
+good = inChain;                   // c) the line is not empty and does not start with ">", so it matches if and only if we're in the chain
+}
+if (good) {
+match += line + "\n";
+} else {
+leftOver += match + line;
+match = "\n";
+}
+}
+if (!/(^|\n)>/.test(match)) {             // d)
+leftOver += match;
+match = "";
+}
+}
+chunk.startTag = match;
+chunk.before = leftOver;
+// end of change
+if (chunk.after) {
+chunk.after = chunk.after.replace(/^\n?/, "\n");
+}
+chunk.after = chunk.after.replace(/^(((\n|^)(\n[ \t]*)*>(.+\n)*.*)+(\n[ \t]*)*)/,
+function (totalMatch) {
+chunk.endTag = totalMatch;
+return "";
+}
+);
+var replaceBlanksInTags = function (useBracket) {
+var replacement = useBracket ? "> " : "";
+if (chunk.startTag) {
+chunk.startTag = chunk.startTag.replace(/\n((>|\s)*)\n$/,
+function (totalMatch, markdown) {
+return "\n" + markdown.replace(/^[ ]{0,3}>?[ \t]*$/gm, replacement) + "\n";
+});
+}
+if (chunk.endTag) {
+chunk.endTag = chunk.endTag.replace(/^\n((>|\s)*)\n/,
+function (totalMatch, markdown) {
+return "\n" + markdown.replace(/^[ ]{0,3}>?[ \t]*$/gm, replacement) + "\n";
+});
+}
+};
+if (/^(?![ ]{0,3}>)/m.test(chunk.selection)) {
+this.wrap(chunk, SETTINGS.lineLength - 2);
+chunk.selection = chunk.selection.replace(/^/gm, "> ");
+replaceBlanksInTags(true);
+chunk.skipLines();
+} else {
+chunk.selection = chunk.selection.replace(/^[ ]{0,3}> ?/gm, "");
+this.unwrap(chunk);
+replaceBlanksInTags(false);
+if (!/^(\n|^)[ ]{0,3}>/.test(chunk.selection) && chunk.startTag) {
+chunk.startTag = chunk.startTag.replace(/\n{0,2}$/, "\n\n");
+}
+if (!/(\n|^)[ ]{0,3}>.*$/.test(chunk.selection) && chunk.endTag) {
+chunk.endTag = chunk.endTag.replace(/^\n{0,2}/, "\n\n");
+}
+}
+chunk.selection = this.hooks.postBlockquoteCreation(chunk.selection);
+if (!/\n/.test(chunk.selection)) {
+chunk.selection = chunk.selection.replace(/^(> *)/,
+function (wholeMatch, blanks) {
+chunk.startTag += blanks;
+return "";
+});
+}
+};
+commandProto.doCode = function (chunk, postProcessing) {
+var hasTextBefore = /\S[ ]*$/.test(chunk.before);
+var hasTextAfter = /^[ ]*\S/.test(chunk.after);
+// Use 'four space' markdown if the selection is on its own
+// line or is multiline.
+if ((!hasTextAfter && !hasTextBefore) || /\n/.test(chunk.selection)) {
+chunk.before = chunk.before.replace(/[ ]{4}$/,
+function (totalMatch) {
+chunk.selection = totalMatch + chunk.selection;
+return "";
+});
+var nLinesBack = 1;
+var nLinesForward = 1;
+if (/(\n|^)(\t|[ ]{4,}).*\n$/.test(chunk.before)) {
+nLinesBack = 0;
+}
+if (/^\n(\t|[ ]{4,})/.test(chunk.after)) {
+nLinesForward = 0;
+}
+chunk.skipLines(nLinesBack, nLinesForward);
+if (!chunk.selection) {
+chunk.startTag = "    ";
+chunk.selection = this.getString("codeexample");
+}
+else {
+if (/^[ ]{0,3}\S/m.test(chunk.selection)) {
+if (/\n/.test(chunk.selection))
+chunk.selection = chunk.selection.replace(/^/gm, "    ");
+else // if it's not multiline, do not select the four added spaces; this is more consistent with the doList behavior
+chunk.before += "    ";
+}
+else {
+chunk.selection = chunk.selection.replace(/^[ ]{4}/gm, "");
+}
+}
+}
+else {
+// Use backticks (`) to delimit the code block.
+chunk.trimWhitespace();
+chunk.findTags(/`/, /`/);
+if (!chunk.startTag && !chunk.endTag) {
+chunk.startTag = chunk.endTag = "`";
+if (!chunk.selection) {
+chunk.selection = this.getString("codeexample");
+}
+}
+else if (chunk.endTag && !chunk.startTag) {
+chunk.before += chunk.endTag;
+chunk.endTag = "";
+}
+else {
+chunk.startTag = chunk.endTag = "";
+}
+}
+};
+commandProto.doList = function (chunk, postProcessing, isNumberedList) {
+// These are identical except at the very beginning and end.
+// Should probably use the regex extension function to make this clearer.
+var previousItemsRegex = /(\n|^)(([ ]{0,3}([*+-]|\d+[.])[ \t]+.*)(\n.+|\n{2,}([*+-].*|\d+[.])[ \t]+.*|\n{2,}[ \t]+\S.*)*)\n*$/;
+var nextItemsRegex = /^\n*(([ ]{0,3}([*+-]|\d+[.])[ \t]+.*)(\n.+|\n{2,}([*+-].*|\d+[.])[ \t]+.*|\n{2,}[ \t]+\S.*)*)\n*/;
+// The default bullet is a dash but others are possible.
+// This has nothing to do with the particular HTML bullet,
+// it's just a markdown bullet.
+var bullet = "-";
+// The number in a numbered list.
+var num = 1;
+// Get the item prefix - e.g. " 1. " for a numbered list, " - " for a bulleted list.
+var getItemPrefix = function () {
+var prefix;
+if (isNumberedList) {
+prefix = " " + num + ". ";
+num++;
+}
+else {
+prefix = " " + bullet + " ";
+}
+return prefix;
+};
+// Fixes the prefixes of the other list items.
+var getPrefixedItem = function (itemText) {
+// The numbering flag is unset when called by autoindent.
+if (isNumberedList === undefined) {
+isNumberedList = /^\s*\d/.test(itemText);
+}
+// Renumber/bullet the list element.
+itemText = itemText.replace(/^[ ]{0,3}([*+-]|\d+[.])\s/gm,
+function (_) {
+return getItemPrefix();
+});
+return itemText;
+};
+chunk.findTags(/(\n|^)*[ ]{0,3}([*+-]|\d+[.])\s+/, null);
+if (chunk.before && !/\n$/.test(chunk.before) && !/^\n/.test(chunk.startTag)) {
+chunk.before += chunk.startTag;
+chunk.startTag = "";
+}
+if (chunk.startTag) {
+var hasDigits = /\d+[.]/.test(chunk.startTag);
+chunk.startTag = "";
+chunk.selection = chunk.selection.replace(/\n[ ]{4}/g, "\n");
+this.unwrap(chunk);
+chunk.skipLines();
+if (hasDigits) {
+// Have to renumber the bullet points if this is a numbered list.
+chunk.after = chunk.after.replace(nextItemsRegex, getPrefixedItem);
+}
+if (isNumberedList == hasDigits) {
+return;
+}
+}
+var nLinesUp = 1;
+chunk.before = chunk.before.replace(previousItemsRegex,
+function (itemText) {
+if (/^\s*([*+-])/.test(itemText)) {
+bullet = re.$1;
+}
+nLinesUp = /[^\n]\n\n[^\n]/.test(itemText) ? 1 : 0;
+return getPrefixedItem(itemText);
+});
+if (!chunk.selection) {
+chunk.selection = this.getString("litem");
+}
+var prefix = getItemPrefix();
+var nLinesDown = 1;
+chunk.after = chunk.after.replace(nextItemsRegex,
+function (itemText) {
+nLinesDown = /[^\n]\n\n[^\n]/.test(itemText) ? 1 : 0;
+return getPrefixedItem(itemText);
+});
+chunk.trimWhitespace(true);
+chunk.skipLines(nLinesUp, nLinesDown, true);
+chunk.startTag = prefix;
+var spaces = prefix.replace(/./g, " ");
+this.wrap(chunk, SETTINGS.lineLength - spaces.length);
+chunk.selection = chunk.selection.replace(/\n/g, "\n" + spaces);
+};
+commandProto.doHeading = function (chunk, postProcessing) {
+// Remove leading/trailing whitespace and reduce internal spaces to single spaces.
+chunk.selection = chunk.selection.replace(/\s+/g, " ");
+chunk.selection = chunk.selection.replace(/(^\s+|\s+$)/g, "");
+// If we clicked the button with no selected text, we just
+// make a level 2 hash header around some default text.
+if (!chunk.selection) {
+chunk.startTag = "## ";
+chunk.selection = this.getString("headingexample");
+chunk.endTag = " ##";
+return;
+}
+var headerLevel = 0;     // The existing header level of the selected text.
+// Remove any existing hash heading markdown and save the header level.
+chunk.findTags(/#+[ ]*/, /[ ]*#+/);
+if (/#+/.test(chunk.startTag)) {
+headerLevel = re.lastMatch.length;
+}
+chunk.startTag = chunk.endTag = "";
+// Try to get the current header level by looking for - and = in the line
+// below the selection.
+chunk.findTags(null, /\s?(-+|=+)/);
+if (/=+/.test(chunk.endTag)) {
+headerLevel = 1;
+}
+if (/-+/.test(chunk.endTag)) {
+headerLevel = 2;
+}
+// Skip to the next line so we can create the header markdown.
+chunk.startTag = chunk.endTag = "";
+chunk.skipLines(1, 1);
+// We make a level 2 header if there is no current header.
+// If there is a header level, we substract one from the header level.
+// If it's already a level 1 header, it's removed.
+var headerLevelToCreate = headerLevel == 0 ? 2 : headerLevel - 1;
+if (headerLevelToCreate > 0) {
+// The button only creates level 1 and 2 underline headers.
+// Why not have it iterate over hash header levels?  Wouldn't that be easier and cleaner?
+var headerChar = headerLevelToCreate >= 2 ? "-" : "=";
+var len = chunk.selection.length;
+if (len > SETTINGS.lineLength) {
+len = SETTINGS.lineLength;
+}
+chunk.endTag = "\n";
+while (len--) {
+chunk.endTag += headerChar;
+}
+}
+};
+commandProto.doHorizontalRule = function (chunk, postProcessing) {
+chunk.startTag = "----------\n";
+chunk.selection = "";
+chunk.skipLines(2, 1, true);
+}
+})();