470 lines
18 KiB
JavaScript
470 lines
18 KiB
JavaScript
/* CodeMirror main module
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*
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* Implements the CodeMirror constructor and prototype, which take care
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* of initializing the editor frame, and providing the outside interface.
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*/
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// The CodeMirrorConfig object is used to specify a default
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// configuration. If you specify such an object before loading this
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// file, the values you put into it will override the defaults given
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// below. You can also assign to it after loading.
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var CodeMirrorConfig = window.CodeMirrorConfig || {};
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var CodeMirror = (function(){
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function setDefaults(object, defaults) {
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for (var option in defaults) {
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if (!object.hasOwnProperty(option))
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object[option] = defaults[option];
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}
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}
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function forEach(array, action) {
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for (var i = 0; i < array.length; i++)
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action(array[i]);
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}
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// These default options can be overridden by passing a set of
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// options to a specific CodeMirror constructor. See manual.html for
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// their meaning.
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setDefaults(CodeMirrorConfig, {
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stylesheet: "",
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path: "",
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parserfile: [],
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basefiles: ["util.js", "stringstream.js", "select.js", "undo.js", "editor.js", "tokenize.js"],
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iframeClass: null,
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passDelay: 200,
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passTime: 50,
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lineNumberDelay: 200,
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lineNumberTime: 50,
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continuousScanning: false,
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saveFunction: null,
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onChange: null,
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undoDepth: 50,
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undoDelay: 800,
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disableSpellcheck: true,
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textWrapping: true,
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readOnly: false,
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width: "",
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height: "300px",
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autoMatchParens: false,
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parserConfig: null,
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tabMode: "indent", // or "spaces", "default", "shift"
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reindentOnLoad: false,
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activeTokens: null,
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cursorActivity: null,
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lineNumbers: false,
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indentUnit: 2,
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domain: null
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});
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function addLineNumberDiv(container) {
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var nums = document.createElement("DIV"),
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scroller = document.createElement("DIV");
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nums.style.position = "absolute";
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nums.style.height = "100%";
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if (nums.style.setExpression) {
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try {nums.style.setExpression("height", "this.previousSibling.offsetHeight + 'px'");}
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catch(e) {} // Seems to throw 'Not Implemented' on some IE8 versions
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}
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nums.style.top = "0px";
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nums.style.overflow = "hidden";
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container.appendChild(nums);
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scroller.className = "CodeMirror-line-numbers";
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nums.appendChild(scroller);
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return nums;
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}
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function frameHTML(options) {
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if (typeof options.parserfile == "string")
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options.parserfile = [options.parserfile];
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if (typeof options.stylesheet == "string")
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options.stylesheet = [options.stylesheet];
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var html = ["<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\"><html><head>"];
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// Hack to work around a bunch of IE8-specific problems.
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html.push("<meta http-equiv=\"X-UA-Compatible\" content=\"IE=EmulateIE7\"/>");
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forEach(options.stylesheet, function(file) {
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html.push("<link rel=\"stylesheet\" type=\"text/css\" href=\"" + file + "\"/>");
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});
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forEach(options.basefiles.concat(options.parserfile), function(file) {
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html.push("<script type=\"text/javascript\" src=\"" + options.path + file + "\"><" + "/script>");
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});
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html.push("</head><body style=\"border-width: 0;\" class=\"editbox\" spellcheck=\"" +
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(options.disableSpellcheck ? "false" : "true") + "\"></body></html>");
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return html.join("");
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}
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var internetExplorer = document.selection && window.ActiveXObject && /MSIE/.test(navigator.userAgent);
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function CodeMirror(place, options) {
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// Backward compatibility for deprecated options.
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if (options.dumbTabs) options.tabMode = "spaces";
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else if (options.normalTab) options.tabMode = "default";
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// Use passed options, if any, to override defaults.
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this.options = options = options || {};
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setDefaults(options, CodeMirrorConfig);
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var frame = this.frame = document.createElement("IFRAME");
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if (options.iframeClass) frame.className = options.iframeClass;
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frame.frameBorder = 0;
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frame.style.border = "0";
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frame.style.width = '100%';
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frame.style.height = '100%';
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// display: block occasionally suppresses some Firefox bugs, so we
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// always add it, redundant as it sounds.
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frame.style.display = "block";
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var div = this.wrapping = document.createElement("DIV");
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div.style.position = "relative";
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div.className = "CodeMirror-wrapping";
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div.style.width = options.width;
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div.style.height = options.height;
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// This is used by Editor.reroutePasteEvent
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var teHack = this.textareaHack = document.createElement("TEXTAREA");
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div.appendChild(teHack);
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teHack.style.position = "absolute";
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teHack.style.left = "-10000px";
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teHack.style.width = "10px";
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// Link back to this object, so that the editor can fetch options
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// and add a reference to itself.
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frame.CodeMirror = this;
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if (options.domain && internetExplorer) {
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this.html = frameHTML(options);
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frame.src = "javascript:(function(){document.open();" +
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(options.domain ? "document.domain=\"" + options.domain + "\";" : "") +
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"document.write(window.frameElement.CodeMirror.html);document.close();})()";
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}
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else {
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frame.src = "javascript:false";
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}
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if (place.appendChild) place.appendChild(div);
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else place(div);
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div.appendChild(frame);
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if (options.lineNumbers) this.lineNumbers = addLineNumberDiv(div);
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this.win = frame.contentWindow;
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if (!options.domain || !internetExplorer) {
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this.win.document.open();
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this.win.document.write(frameHTML(options));
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this.win.document.close();
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}
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}
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CodeMirror.prototype = {
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init: function() {
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if (this.options.initCallback) this.options.initCallback(this);
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if (this.options.lineNumbers) this.activateLineNumbers();
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if (this.options.reindentOnLoad) this.reindent();
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},
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getCode: function() {return this.editor.getCode();},
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setCode: function(code) {this.editor.importCode(code);},
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selection: function() {this.focusIfIE(); return this.editor.selectedText();},
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reindent: function() {this.editor.reindent();},
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reindentSelection: function() {this.focusIfIE(); this.editor.reindentSelection(null);},
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focusIfIE: function() {
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// in IE, a lot of selection-related functionality only works when the frame is focused
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if (this.win.select.ie_selection) this.focus();
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},
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focus: function() {
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this.win.focus();
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if (this.editor.selectionSnapshot) // IE hack
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this.win.select.setBookmark(this.win.document.body, this.editor.selectionSnapshot);
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},
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replaceSelection: function(text) {
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this.focus();
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this.editor.replaceSelection(text);
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return true;
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},
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replaceChars: function(text, start, end) {
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this.editor.replaceChars(text, start, end);
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},
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getSearchCursor: function(string, fromCursor, caseFold) {
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return this.editor.getSearchCursor(string, fromCursor, caseFold);
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},
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undo: function() {this.editor.history.undo();},
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redo: function() {this.editor.history.redo();},
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historySize: function() {return this.editor.history.historySize();},
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clearHistory: function() {this.editor.history.clear();},
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grabKeys: function(callback, filter) {this.editor.grabKeys(callback, filter);},
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ungrabKeys: function() {this.editor.ungrabKeys();},
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setParser: function(name) { this.editor.setParser(name); },
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setSpellcheck: function(on) {this.win.document.body.spellcheck = on;},
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setStylesheet: function(names) {
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if (typeof names === "string") names = [names];
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var activeStylesheets = {};
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var matchedNames = {};
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var links = this.win.document.getElementsByTagName("link");
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// Create hashes of active stylesheets and matched names.
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// This is O(n^2) but n is expected to be very small.
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for (var x = 0, link; link = links[x]; x++) {
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if (link.rel.indexOf("stylesheet") !== -1) {
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for (var y = 0; y < names.length; y++) {
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var name = names[y];
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if (link.href.substring(link.href.length - name.length) === name) {
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activeStylesheets[link.href] = true;
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matchedNames[name] = true;
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}
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}
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}
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}
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// Activate the selected stylesheets and disable the rest.
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for (var x = 0, link; link = links[x]; x++) {
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if (link.rel.indexOf("stylesheet") !== -1) {
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link.disabled = !(link.href in activeStylesheets);
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}
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}
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// Create any new stylesheets.
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for (var y = 0; y < names.length; y++) {
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var name = names[y];
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if (!(name in matchedNames)) {
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var link = this.win.document.createElement("link");
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link.rel = "stylesheet";
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link.type = "text/css";
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link.href = name;
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this.win.document.getElementsByTagName('head')[0].appendChild(link);
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}
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}
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},
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setTextWrapping: function(on) {
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if (on == this.options.textWrapping) return;
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this.win.document.body.style.whiteSpace = on ? "" : "nowrap";
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this.options.textWrapping = on;
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if (this.lineNumbers) {
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this.setLineNumbers(false);
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this.setLineNumbers(true);
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}
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},
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setIndentUnit: function(unit) {this.win.indentUnit = unit;},
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setUndoDepth: function(depth) {this.editor.history.maxDepth = depth;},
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setTabMode: function(mode) {this.options.tabMode = mode;},
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setLineNumbers: function(on) {
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if (on && !this.lineNumbers) {
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this.lineNumbers = addLineNumberDiv(this.wrapping);
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this.activateLineNumbers();
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}
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else if (!on && this.lineNumbers) {
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this.wrapping.removeChild(this.lineNumbers);
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this.wrapping.style.marginLeft = "";
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this.lineNumbers = null;
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}
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},
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cursorPosition: function(start) {this.focusIfIE(); return this.editor.cursorPosition(start);},
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firstLine: function() {return this.editor.firstLine();},
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lastLine: function() {return this.editor.lastLine();},
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nextLine: function(line) {return this.editor.nextLine(line);},
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prevLine: function(line) {return this.editor.prevLine(line);},
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lineContent: function(line) {return this.editor.lineContent(line);},
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setLineContent: function(line, content) {this.editor.setLineContent(line, content);},
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removeLine: function(line){this.editor.removeLine(line);},
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insertIntoLine: function(line, position, content) {this.editor.insertIntoLine(line, position, content);},
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selectLines: function(startLine, startOffset, endLine, endOffset) {
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this.win.focus();
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this.editor.selectLines(startLine, startOffset, endLine, endOffset);
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},
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nthLine: function(n) {
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var line = this.firstLine();
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for (; n > 1 && line !== false; n--)
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line = this.nextLine(line);
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return line;
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},
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lineNumber: function(line) {
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var num = 0;
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while (line !== false) {
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num++;
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line = this.prevLine(line);
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}
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return num;
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},
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jumpToLine: function(line) {
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if (typeof line == "number") line = this.nthLine(line);
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this.selectLines(line, 0);
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this.win.focus();
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},
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currentLine: function() { // Deprecated, but still there for backward compatibility
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return this.lineNumber(this.cursorLine());
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},
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cursorLine: function() {
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return this.cursorPosition().line;
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},
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activateLineNumbers: function() {
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var frame = this.frame, win = frame.contentWindow, doc = win.document, body = doc.body,
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nums = this.lineNumbers, scroller = nums.firstChild, self = this;
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var barWidth = null;
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function sizeBar() {
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if (frame.offsetWidth == 0) return;
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for (var root = frame; root.parentNode; root = root.parentNode);
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if (!nums.parentNode || root != document || !win.Editor) {
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// Clear event handlers (their nodes might already be collected, so try/catch)
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try{clear();}catch(e){}
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clearInterval(sizeInterval);
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return;
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}
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if (nums.offsetWidth != barWidth) {
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barWidth = nums.offsetWidth;
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nums.style.left = "-" + (frame.parentNode.style.marginLeft = barWidth + "px");
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}
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}
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function doScroll() {
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nums.scrollTop = body.scrollTop || doc.documentElement.scrollTop || 0;
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}
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// Cleanup function, registered by nonWrapping and wrapping.
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var clear = function(){};
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sizeBar();
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var sizeInterval = setInterval(sizeBar, 500);
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function nonWrapping() {
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var nextNum = 1, pending;
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function update() {
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var target = 50 + Math.max(body.offsetHeight, Math.max(frame.offsetHeight, body.scrollHeight || 0));
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var endTime = new Date().getTime() + self.options.lineNumberTime;
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while (scroller.offsetHeight < target && (!scroller.firstChild || scroller.offsetHeight)) {
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scroller.appendChild(document.createElement("DIV"));
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scroller.lastChild.innerHTML = nextNum++;
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if (new Date().getTime() > endTime) {
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if (pending) clearTimeout(pending);
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pending = setTimeout(update, self.options.lineNumberDelay);
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break;
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}
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}
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doScroll();
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}
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var onScroll = win.addEventHandler(win, "scroll", update, true),
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onResize = win.addEventHandler(win, "resize", update, true);
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clear = function(){onScroll(); onResize(); if (pending) clearTimeout(pending);};
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update();
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}
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function wrapping() {
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var node, lineNum, next, pos;
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function addNum(n) {
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if (!lineNum) lineNum = scroller.appendChild(document.createElement("DIV"));
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lineNum.innerHTML = n;
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pos = lineNum.offsetHeight + lineNum.offsetTop;
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lineNum = lineNum.nextSibling;
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}
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function work() {
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if (!scroller.parentNode || scroller.parentNode != self.lineNumbers) return;
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var endTime = new Date().getTime() + self.options.lineNumberTime;
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while (node) {
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addNum(next++);
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for (; node && !win.isBR(node); node = node.nextSibling) {
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var bott = node.offsetTop + node.offsetHeight;
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while (scroller.offsetHeight && bott - 3 > pos) addNum(" ");
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}
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if (node) node = node.nextSibling;
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if (new Date().getTime() > endTime) {
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pending = setTimeout(work, self.options.lineNumberDelay);
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return;
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}
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}
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// While there are un-processed number DIVs, or the scroller is smaller than the frame...
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var target = 50 + Math.max(body.offsetHeight, Math.max(frame.offsetHeight, body.scrollHeight || 0));
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while (lineNum || (scroller.offsetHeight < target && (!scroller.firstChild || scroller.offsetHeight)))
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addNum(next++);
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doScroll();
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}
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function start() {
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doScroll();
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node = body.firstChild;
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lineNum = scroller.firstChild;
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pos = 0;
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next = 1;
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work();
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}
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start();
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var pending = null;
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function update() {
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if (pending) clearTimeout(pending);
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if (self.editor.allClean()) start();
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else pending = setTimeout(update, 200);
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}
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self.updateNumbers = update;
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var onScroll = win.addEventHandler(win, "scroll", doScroll, true),
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onResize = win.addEventHandler(win, "resize", update, true);
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clear = function(){
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if (pending) clearTimeout(pending);
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if (self.updateNumbers == update) self.updateNumbers = null;
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onScroll();
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onResize();
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};
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}
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(this.options.textWrapping ? wrapping : nonWrapping)();
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}
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};
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CodeMirror.InvalidLineHandle = {toString: function(){return "CodeMirror.InvalidLineHandle";}};
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CodeMirror.replace = function(element) {
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if (typeof element == "string")
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element = document.getElementById(element);
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return function(newElement) {
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element.parentNode.replaceChild(newElement, element);
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};
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};
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CodeMirror.fromTextArea = function(area, options) {
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if (typeof area == "string")
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area = document.getElementById(area);
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options = options || {};
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if (area.style.width && options.width == null)
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options.width = area.style.width;
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if (area.style.height && options.height == null)
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options.height = area.style.height;
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if (options.content == null) options.content = area.value;
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if (area.form) {
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function updateField() {
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area.value = mirror.getCode();
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}
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if (typeof area.form.addEventListener == "function")
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area.form.addEventListener("submit", updateField, false);
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else
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area.form.attachEvent("onsubmit", updateField);
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}
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function insert(frame) {
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if (area.nextSibling)
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area.parentNode.insertBefore(frame, area.nextSibling);
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else
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area.parentNode.appendChild(frame);
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}
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area.style.display = "none";
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var mirror = new CodeMirror(insert, options);
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return mirror;
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};
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CodeMirror.isProbablySupported = function() {
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// This is rather awful, but can be useful.
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var match;
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if (window.opera)
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return Number(window.opera.version()) >= 9.52;
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else if (/Apple Computers, Inc/.test(navigator.vendor) && (match = navigator.userAgent.match(/Version\/(\d+(?:\.\d+)?)\./)))
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return Number(match[1]) >= 3;
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else if (document.selection && window.ActiveXObject && (match = navigator.userAgent.match(/MSIE (\d+(?:\.\d*)?)\b/)))
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return Number(match[1]) >= 6;
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else if (match = navigator.userAgent.match(/gecko\/(\d{8})/i))
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return Number(match[1]) >= 20050901;
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else if (match = navigator.userAgent.match(/AppleWebKit\/(\d+)/))
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return Number(match[1]) >= 525;
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else
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return null;
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};
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return CodeMirror;
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})();
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