/*
This file is part of Thomas Bley's moregroupware webmail2/calendar2/admin2 module. (tb-mgw)

More information:
-----------------

Simple Groupware Solutions Thomas Bley
Fichtenstr. 23
Germany, 85640 Putzbrunn

Contact:
--------

info@simple-groupware.de

http://www.simple-groupware.de


Copyright 2002-2003 Thomas Bley
tb-mgw is distributed under the terms of the GNU General Public License 

tb-mgw is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

tb-mgw is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with tb-mgw; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

// Htmlarea
// Moregroupware.org

//
// htmlArea v3.0 - Copyright (c) 2002 interactivetools.com, inc.
// This copyright notice MUST stay intact for use (see license.txt).
//
// A free WYSIWYG editor replacement for <textarea> fields.
// For full source code and docs, visit http://www.interactivetools.com/
//
// Version 3.0 developed by Mihai Bazon for InteractiveTools.
//	     http://students.infoiasi.ro/~mishoo
//
// $Id: htmlarea.js,v 1.2 2003/10/26 14:10:22 emailtotom Exp $

// Creates a new HTMLArea object.  Tries to replace the textarea with the given
// ID with it.

function HTMLArea(textarea, config) {
	if (HTMLArea.checkSupportedBrowser()) {
		if (typeof config == "undefined") {
			this.config = new HTMLArea.Config();
		} else {
			this.config = config;
		}
		this._htmlArea = null;
		this._textArea = textarea;
		this._editMode = "wysiwyg";
	}
};

HTMLArea.Config = function () {
	this.version = "3.0";

	this.width = "auto";
	this.height = "auto";

	// the next parameter specifies whether the toolbar should be included
	// in the size or not.
	this.sizeIncludesToolbar = true;

	// style included in the iframe document
	this.pageStyle = "body { background-color: #fff; font-family: "+(typeof custom_font != "undefined" ?custom_font:"")+"; font-size: "+(typeof custom_font_size != "undefined" ? custom_font_size : "")+"; }"; // 11px, verdana,sans-serif
	if (typeof _editor_url != "undefined") {
		this.editorURL = _editor_url;
	} else {
		this.editorURL = "";
	}

	// URL-s
	this.imgURL = "templates/default/htmlarea/images/";
	this.popupURL = "templates/default/htmlarea/popups/";

	this.debug = 0;

	/** CUSTOMIZING THE TOOLBAR
	 * -------------------------
	 *
	 * It is recommended that you customize the toolbar contents in an
	 * external file (i.e. the one calling HTMLArea) and leave this one
	 * unchanged.  That's because when we (InteractiveTools.com) release a
	 * new official version, it's less likely that you will have problems
	 * upgrading HTMLArea.
	 */
	this.toolbar = [ [ "fontname", "space" ],
			 [ "fontsize", "space" ],
			 [ "formatblock", "space"],
			 [ "bold", "italic", "underline", "separator" ],
			 [ "strikethrough", "subscript", "superscript", "linebreak" ],
			 [ "justifyleft", "justifycenter", "justifyright", "justifyfull", "separator" ],
			 [ "insertorderedlist", "insertunorderedlist", "outdent", "indent", "separator" ],
			 [ "forecolor", "hilitecolor", "textindicator", "separator" ],
			 [ "inserthorizontalrule", "createlink", "insertimage", "inserttable", "htmlmode", "separator" ],
			 [ "popupeditor", "separator", "showhelp", "about" ]
		];

	this.fontname = {
		"Arial":	   'arial,helvetica,sans-serif',
		"Courier New":	   'courier new,courier,monospace',
		"Georgia":	   'georgia,times new roman,times,serif',
		"Tahoma":	   'tahoma,arial,helvetica,sans-serif',
		"Times New Roman": 'times new roman,times,serif',
		"Verdana":	   'verdana,arial,helvetica,sans-serif',
		"impact":	   'impact',
		"WingDings":	   'wingdings'
	};

	this.fontsize = {
		"1 (8 pt)":  "1",
		"2 (10 pt)": "2",
		"3 (12 pt)": "3",
		"4 (14 pt)": "4",
		"5 (18 pt)": "5",
		"6 (24 pt)": "6",
		"7 (36 pt)": "7"
	};

	this.formatblock = {
		"Heading 1": "h1",
		"Heading 2": "h2",
		"Heading 3": "h3",
		"Heading 4": "h4",
		"Heading 5": "h5",
		"Heading 6": "h6",
		"Normal": "p",
		"Address": "address",
		"Formatted": "pre"
	};

	// ADDING CUSTOM BUTTONS: please read below!
	// format of the btnList elements is "ID: [ ToolTip, Icon, Enabled in text mode?, ACTION ]"
	//    - ID: unique ID for the button.  If the button calls document.execCommand
	//	    it's wise to give it the same name as the called command.
	//    - ACTION: function that gets called when the button is clicked.
	//              it has the following prototype:
	//                 function(editor, buttonName)
	//              - editor is the HTMLArea object that triggered the call
	//              - buttonName is the ID of the clicked button
	//              These 2 parameters makes it possible for you to use the same
	//              handler for more HTMLArea objects or for more different buttons.
	//    - ToolTip: default tooltip, for cases when it is not defined in the -lang- file (HTMLArea.I18N)
	//    - Icon: path to an icon image file for the button (FIXME: to be changed! use one image for all buttons!)
	//    - Enabled in text mode: if false the button gets disabled for text-only mode; otherwise enabled all the time.
	this.btnList = {
		bold: [ "Bold", "ed_format_bold.gif", false, function(e) {e.execCommand("bold");} ],
		italic: [ "Italic", "ed_format_italic.gif", false, function(e) {e.execCommand("italic");} ],
		underline: [ "Underline", "ed_format_underline.gif", false, function(e) {e.execCommand("underline");} ],
		strikethrough: [ "Strikethrough", "ed_format_strike.gif", false, function(e) {e.execCommand("strikethrough");} ],
		subscript: [ "Subscript", "ed_format_sub.gif", false, function(e) {e.execCommand("subscript");} ],
		superscript: [ "Superscript", "ed_format_sup.gif", false, function(e) {e.execCommand("superscript");} ],
		justifyleft: [ "Justify Left", "ed_align_left.gif", false, function(e) {e.execCommand("justifyleft");} ],
		justifycenter: [ "Justify Center", "ed_align_center.gif", false, function(e) {e.execCommand("justifycenter");} ],
		justifyright: [ "Justify Right", "ed_align_right.gif", false, function(e) {e.execCommand("justifyright");} ],
		justifyfull: [ "Justify Full", "ed_align_justify.gif", false, function(e) {e.execCommand("justifyfull");} ],
		insertorderedlist: [ "Ordered List", "ed_list_num.gif", false, function(e) {e.execCommand("insertorderedlist");} ],
		insertunorderedlist: [ "Bulleted List", "ed_list_bullet.gif", false, function(e) {e.execCommand("insertunorderedlist");} ],
		outdent: [ "Decrease Indent", "ed_indent_less.gif", false, function(e) {e.execCommand("outdent");} ],
		indent: [ "Increase Indent", "ed_indent_more.gif", false, function(e) {e.execCommand("indent");} ],
		forecolor: [ "Font Color", "ed_color_fg.gif", false, function(e) {e.execCommand("forecolor");} ],
		hilitecolor: [ "Background Color", "ed_color_bg.gif", false, function(e) {e.execCommand("hilitecolor");} ],
		inserthorizontalrule: [ "Horizontal Rule", "ed_hr.gif", false, function(e) {e.execCommand("inserthorizontalrule");} ],
		createlink: [ "Insert Web Link", "ed_link.gif", false, function(e) {e.execCommand("createlink", true);} ],
		insertimage: [ "Insert Image", "ed_image.gif", false, function(e) {e.execCommand("insertimage");} ],
		inserttable: [ "Insert Table", "insert_table.gif", false, function(e) {e.execCommand("inserttable");} ],
		htmlmode: [ "Toggle HTML Source", "ed_html.gif", true, function(e) {e.execCommand("htmlmode");} ],
		popupeditor: [ "Enlarge Editor", "fullscreen_maximize.gif", true, function(e) {e.execCommand("popupeditor");} ],
		about: [ "About this editor", "ed_about.gif", true, function(e) {e.execCommand("about");} ],
		showhelp: [ "Help using editor", "ed_help.gif", true, function(e) {e.execCommand("showhelp");} ]
	};
	/* ADDING CUSTOM BUTTONS
	 * ---------------------
	 *
	 * It is recommended that you add the custom buttons in an external
	 * file and leave this one unchanged.  That's because when we
	 * (InteractiveTools.com) release a new official version, it's less
	 * likely that you will have problems upgrading HTMLArea.
	 *
	 * Example on how to add a custom button when you construct the HTMLArea:
	 *
	 *   var editor = new HTMLArea("your_text_area_id");
	 *   var cfg = editor.config; // this is the default configuration
	 *   cfg.btnList["my-hilite"] =
	 *	[ function(editor) { editor.surroundHTML('<span style="background:yellow">', '</span>'); }, // action
	 *	  "Highlight selection", // tooltip
	 *	  "my_hilite.gif", // image
	 *	  false // disabled in text mode
	 *	];
	 *   cfg.toolbar.push(["linebreak", "my-hilite"]); // add the new button to the toolbar
	 *
	 * An alternate (also more convenient and recommended) way to
	 * accomplish this is to use the registerButton function below.
	 */
	// initialize tooltips from the I18N module
	for (var i in this.btnList) {
		var btn = this.btnList[i];
		if (typeof HTMLArea.I18N.tooltips[i] != "undefined") {
			btn[0] = HTMLArea.I18N.tooltips[i];
		}
	}
};

/** Helper function: register a new button with the configuration.  It can be
 * called with all 5 arguments, or with only one (first one).  When called with
 * only one argument it must be an object with the following properties: id,
 * tooltip, image, textMode, action.  Examples:
 *
 * 1. config.registerButton("my-hilite", "Hilite text", "my-hilite.gif", false, function(editor) {...});
 * 2. config.registerButton({
 *      id       : "my-hilite",      // the ID of your button
 *      tooltip  : "Hilite text",    // the tooltip
 *      image    : "my-hilite.gif",  // image to be displayed in the toolbar
 *      textMode : false,            // disabled in text mode
 *      action   : function(editor) { // called when the button is clicked
 *                   editor.surroundHTML('<span class="hilite">', '</span>');
 *                 }
 *    });
 */
HTMLArea.Config.prototype.registerButton = function(id, tooltip, image, textMode, action) {
	switch (typeof id) {
	    case "string": this.btnList[id] = [ tooltip, image, textMode, action ]; break;
	    case "object": this.btnList[id.id] = [ id.tooltip, id.image, id.textMode, id.action ]; break;
	    default: alert("HTMLArea.Config::registerButton -- invalid arguments");
	}
};

/** Helper function: replace all TEXTAREA-s in the document with HTMLArea-s. */
HTMLArea.replaceAll = function(config) {
	var tas = document.getElementsByTagName("textarea");
	for (var i = tas.length; i > 0; (new HTMLArea(tas[--i], config)).generate());
};

/** Helper function: replaces the TEXTAREA with the given ID with HTMLArea. */
HTMLArea.replace = function(id, config) {
	var ta = document.getElementById(id);
	return ta ? (new HTMLArea(ta, config)).generate() : null;
};

// Creates the toolbar and appends it to the _htmlarea
HTMLArea.prototype._createToolbar = function () {
	var editor = this;	// to access this in nested functions

	var toolbar = document.createElement("div");
	this._toolbar = toolbar;
	toolbar.className = "toolbar";
	toolbar.unselectable = "1";
	if (editor.config.debug) {
		toolbar.style.border = "1px solid red";
	}
	var tb_row = null;
	var tb_objects = new Object();
	this._toolbarObjects = tb_objects;

	// creates a new line in the toolbar
	function newLine() {
		var table = document.createElement("table");
		table.border = "0px";
		table.cellSpacing = "0px";
		table.cellPadding = "0px";
		toolbar.appendChild(table);
		// TBODY is required for IE, otherwise you don't see anything
		// in the TABLE.
		var tb_body = document.createElement("tbody");
		table.appendChild(tb_body);
		tb_row = document.createElement("tr");
		tb_body.appendChild(tb_row);
	}; // END of function: newLine
	// init first line
	newLine();

	// updates the state of a toolbar element.  This function is member of
	// a toolbar element object (unnamed objects created by createButton or
	// createSelect functions below).
	function setButtonStatus(id, newval) {
		var oldval = this[id];
		var el = this.element;
		if (oldval != newval) {
			switch (id) {
			    case "enabled":
				if (newval) {
					HTMLArea._removeClass(el, "buttonDisabled");
					el.disabled = false;
				} else {
					HTMLArea._addClass(el, "buttonDisabled");
					el.disabled = true;
				}
				break;
			    case "active":
				if (newval) {
					HTMLArea._addClass(el, "buttonPressed");
				} else {
					HTMLArea._removeClass(el, "buttonPressed");
				}
				break;
			}
			this[id] = newval;
		}
	}; // END of function: setButtonStatus

	// this function will handle creation of combo boxes.  Receives as
	// parameter the name of a button as defined in the toolBar config.
	// This function is called from createButton, above, if the given "txt"
	// doesn't match a button.
	function createSelect(txt) {
		var options = null;
		var el = null;
		var cmd = null;
		switch (txt) {
		    case "fontsize":
		    case "fontname":
		    case "formatblock":
			// the following line retrieves the correct
			// configuration option because the variable name
			// inside the Config object is named the same as the
			// button/select in the toolbar.  For instance, if txt
			// == "formatblock" we retrieve config.formatblock (or
			// a different way to write it in JS is
			// config["formatblock"].
			options = editor.config[txt];
			cmd = txt;
			break;
		}
		if (options) {
			el = document.createElement("select");
			var obj = {
				name	: txt, // field name
				element : el,	// the UI element (SELECT)
				enabled : true, // is it enabled?
				text	: false, // enabled in text mode?
				cmd	: cmd, // command ID
				state	: setButtonStatus // for changing state
			};
			tb_objects[txt] = obj;
			for (var i in options) {
				var op = document.createElement("option");
				op.appendChild(document.createTextNode(i));
				op.value = options[i];
				el.appendChild(op);
			}
			HTMLArea._addEvent(el, "change", function () {
				editor._comboSelected(el, txt);
			});
		}
		return el;
	}; // END of function: createSelect

	// appends a new button to toolbar
	function createButton(txt) {
		// the element that will be created
		var el = null;
		var btn = null;
		switch (txt) {
		    case "separator":
			el = document.createElement("div");
			el.className = "separator";
			break;
		    case "space":
			el = document.createElement("div");
			el.className = "space";
			break;
		    case "linebreak":
			newLine();
			return false;
		    case "textindicator":
			el = document.createElement("div");
			el.appendChild(document.createTextNode("A"));
			el.className = "indicator";
			el.title = HTMLArea.I18N.tooltips.textindicator;
			var obj = {
				name	: txt, // the button name (i.e. 'bold')
				element : el, // the UI element (DIV)
				enabled : true, // is it enabled?
				active	: false, // is it pressed?
				text	: false, // enabled in text mode?
				cmd	: "textindicator", // the command ID
				state	: setButtonStatus // for changing state
			};
			tb_objects[txt] = obj;
			break;
		    default:
			btn = editor.config.btnList[txt];
		}
		if (!el && btn) {
			el = document.createElement("div");
			el.title = btn[0];
			el.className = "button";
			// let's just pretend we have a button object, and
			// assign all the needed information to it.
			var obj = {
				name	: txt, // the button name (i.e. 'bold')
				element : el, // the UI element (DIV)
				enabled : true, // is it enabled?
				active	: false, // is it pressed?
				text	: btn[2], // enabled in text mode?
				cmd	: btn[3], // the command ID
				state	: setButtonStatus // for changing state
			};
			tb_objects[txt] = obj;
			// handlers to emulate nice flat toolbar buttons
			HTMLArea._addEvent(el, "mouseover", function () {
				if (obj.enabled) {
					HTMLArea._addClass(el, "buttonHover");
				}
			});
			HTMLArea._addEvent(el, "mouseout", function () {
				if (obj.enabled) with (HTMLArea) {
					_removeClass(el, "buttonHover");
					_removeClass(el, "buttonActive");
					(obj.active) && _addClass(el, "buttonPressed");
				}
			});
			HTMLArea._addEvent(el, "mousedown", function (ev) {
				if (obj.enabled) with (HTMLArea) {
					_addClass(el, "buttonActive");
					_removeClass(el, "buttonPressed");
					_stopEvent(is_ie ? window.event : ev);
				}
			});
			// when clicked, do the following:
			HTMLArea._addEvent(el, "click", function (ev) {
				if (obj.enabled) with (HTMLArea) {
					_removeClass(el, "buttonActive");
					_removeClass(el, "buttonHover");
					obj.cmd(editor, obj.name);
					_stopEvent(is_ie ? window.event : ev);
				}
			});
			var img = document.createElement("img");
			img.src = editor.imgURL(btn[1]);
			el.appendChild(img);
		} else if (!el) {
			el = createSelect(txt);
		}
		if (el) {
			var tb_cell = document.createElement("td");
			tb_row.appendChild(tb_cell);
			tb_cell.appendChild(el);
		} else {
			alert("FIXME: Unknown toolbar item: " + txt);
		}
		return el;
	};

	for (var i in this.config.toolbar) {
		var group = this.config.toolbar[i];
		for (var j in group) {
			createButton(group[j]);
		}
	}

	this._htmlArea.appendChild(toolbar);
};

// Creates the HTMLArea object and replaces the textarea with it.
HTMLArea.prototype.generate = function () {
	var editor = this;	// we'll need "this" in some nested functions
	// get the textarea
	var textarea = this._textArea;
	if (typeof textarea == "string") {
		// it's not element but ID
		this._textArea = textarea = document.getElementById(textarea);
	}
	this._ta_size = {
		w: textarea.offsetWidth,
		h: textarea.offsetHeight
	};
	textarea.style.display = "none";

	// create the editor framework
	var htmlarea = document.createElement("div");
	htmlarea.className = "htmlarea";
	this._htmlArea = htmlarea;

	// insert the editor before the textarea.
	textarea.parentNode.insertBefore(htmlarea, textarea);

	if (textarea.form) {
		// we have a form, on submit get the HTMLArea content and
		// update original textarea.
		textarea.form.onsubmit = function() {
			editor._textArea.value = editor.getHTML();
		};
	}

	// add a handler for the "back/forward" case -- on body.unload we save
	// the HTML content into the original textarea.
	window.onunload = function() {
		editor._textArea.value = editor.getHTML();
	};

	// creates & appends the toolbar
	this._createToolbar();

	// create the IFRAME
	var iframe = document.createElement("iframe");
	htmlarea.appendChild(iframe);

	this._iframe = iframe;

	// remove the default border as it keeps us from computing correctly
	// the sizes.  (somebody tell me why doesn't this work in IE)
	// iframe.style.border = "none";
	// iframe.frameBorder = "1";
	// iframe.marginHeight = "0";
	// iframe.marginWidth = "0";

	// size the IFRAME according to user's prefs or initial textarea
	var height = (this.config.height == "auto" ? (this._ta_size.h + "px") : this.config.height);
	height = parseInt(height);
	var width = (this.config.width == "auto" ? (this._ta_size.w + "px") : this.config.width);
	width = parseInt(width);

	iframe.style.width = width + "px";
	if (this.config.sizeIncludesToolbar) {
		// substract toolbar height
		height -= this._toolbar.offsetHeight;
	}
	if (height < 0) {
		height = 0;
	}
	iframe.style.height = height + "px";

	// the editor including the toolbar now have the same size as the
	// original textarea.. which means that we need to reduce that a bit.
	textarea.style.width = iframe.style.width;
 	textarea.style.height = iframe.style.height;

	// IMPORTANT: we have to allow Mozilla a short time to recognize the
	// new frame.  Otherwise we get a stupid exception.
	function initIframe() {
		var doc = editor._iframe.contentWindow.document;
		if (!doc) {
			// Try again..
			// FIXME: don't know what else to do here.  Normally
			// we'll never reach this point.
			if (HTMLArea.is_gecko) {
				setTimeout(initIframe, 10);
				return false;
			} else {
				alert("ERROR: IFRAME can't be initialized.");
			}
		}
		if (HTMLArea.is_gecko) {
			// enable editable mode for Mozilla
			doc.designMode = "on";
		}
		editor._doc = doc;
		doc.open();
		var html = "<html>\n";
		html += "<head>\n";
		html += "<style>" + editor.config.pageStyle + "</style>\n";
		html += "</head>\n";
		html += "<body topmargin='0' marginheight='0' leftmargin='3' bottommargin='0' rightmargin='3' marginwidth='3'>\n";
		html += editor._textArea.value;
		html += "</body>\n";
		html += "</html>";
		doc.write(html);
		doc.close();

		if (HTMLArea.is_ie) {
			// enable editable mode for IE.	 For some reason this
			// doesn't work if done in the same place as for Gecko
			// (above).
			doc.body.contentEditable = true;
		}

		editor.focusEditor();
		// intercept some events; for updating the toolbar & keyboard handlers
		HTMLArea._addEvents
			(doc, ["keydown", "keypress", "mousedown", "mouseup", "drag"],
			 function (event) {
				 return editor._editorEvent(HTMLArea.is_ie ? editor._iframe.contentWindow.event : event);
			 });
		editor.updateToolbar();
	};
	setTimeout(initIframe, HTMLArea.is_gecko ? 10 : 0);
};

// Switches editor mode; parameter can be "textmode" or "wysiwyg".  If no
// parameter was passed this function toggles between modes.
HTMLArea.prototype.setMode = function(mode) {
	if (typeof mode == "undefined") {
		mode = ((this._editMode == "textmode") ? "wysiwyg" : "textmode");
	}
	switch (mode) {
	    case "textmode":
		this._textArea.value = this.getHTML();
		this._iframe.style.display = "none";
		this._textArea.style.display = "block";
		break;
	    case "wysiwyg":
		if (HTMLArea.is_gecko) {
			// disable design mode before changing innerHTML
			this._doc.designMode = "off";
		}
		this._doc.body.innerHTML = this.getHTML();
		this._iframe.style.display = "block";
		this._textArea.style.display = "none";
		if (HTMLArea.is_gecko) {
			// we need to refresh that info for Moz-1.3a
			this._doc.designMode = "on";
		}
		break;
	    default:
		alert("Mode <" + mode + "> not defined!");
		return false;
	}
	this._editMode = mode;
	this.focusEditor();
};

/***************************************************
 *  Category: EDITOR UTILITIES
 ***************************************************/

// focuses the iframe window.  returns a reference to the editor document.
HTMLArea.prototype.focusEditor = function() {
	switch (this._editMode) {
	    case "wysiwyg" : this._iframe.contentWindow.focus(); break;
	    case "textmode": this._textArea.focus(); break;
	    default	   : alert("ERROR: mode " + this._editMode + " is not defined");
	}
	return this._doc;
};

// updates enabled/disable/active state of the toolbar elements
HTMLArea.prototype.updateToolbar = function() {
	var doc = this._doc;
	var text = (this._editMode == "textmode");
	for (var i in this._toolbarObjects) {
		var btn = this._toolbarObjects[i];
		var cmd = i;
		btn.state("enabled", !text || btn.text);
		if (typeof cmd == "function") {
			continue;
		}
		switch (cmd) {
		    case "fontname":
		    case "fontsize":
		    case "formatblock":
			if (!text) {
				var value = ("" + doc.queryCommandValue(cmd)).toLowerCase();
				if (!value) {
					// FIXME: what do we do here?
					break;
				}
				// HACK -- retrieve the config option for this
				// combo box.  We rely on the fact that the
				// variable in config has the same name as
				// button name in the toolbar.
				var options = this.config[cmd];
				var k = 0;
				// btn.element.selectedIndex = 0;
				for (var j in options) {
					// FIXME: the following line is scary.
					if ((j.toLowerCase() == value) ||
					    (options[j].substr(0, value.length).toLowerCase() == value)) {
						btn.element.selectedIndex = k;
						break;
					}
					++k;
				}
			}
			break;
		    case "textindicator":
			if (!text) {
				try {with (btn.element.style) {
					backgroundColor = HTMLArea._makeColor(
						doc.queryCommandValue(HTMLArea.is_ie ? "backcolor" : "hilitecolor"));
					color = HTMLArea._makeColor(doc.queryCommandValue("forecolor"));
					fontFamily = doc.queryCommandValue("fontname");
					fontWeight = doc.queryCommandState("bold") ? "bold" : "normal";
					fontStyle = doc.queryCommandState("italic") ? "italic" : "normal";
				}} catch (e) {
					// alert(e + "\n\n" + cmd);
				}
			}
			break;
		    case "htmlmode": btn.state("active", text); break;
		    default:
			try {
				btn.state("active", (!text && doc.queryCommandState(cmd)));
			} catch (e) {}
		}
	}
};

/** Returns a node after which we can insert other nodes, in the current
 * selection.  The selection is removed.  It splits a text node, if needed.
 */
HTMLArea.prototype.insertNodeAtSelection = function(toBeInserted) {
	if (!HTMLArea.is_ie) {
		var sel = this._getSelection();
		var range = this._createRange(sel);
		// remove the current selection
		sel.removeAllRanges();
		range.deleteContents();
		var node = range.startContainer;
		var pos = range.startOffset;
		range = this._createRange();
		switch (node.nodeType) {
		    case 3: // Node.TEXT_NODE
			// we have to split it at the caret position.
			if (toBeInserted.nodeType == 3) {
				// do optimized insertion
				node.insertData(pos, toBeInserted.data);
				range.setEnd(node, pos + toBeInserted.length);
				range.setStart(node, pos + toBeInserted.length);
			} else {
				node = node.splitText(pos);
				node.parentNode.insertBefore(toBeInserted, node);
				range.setStart(node, 0);
				range.setEnd(node, 0);
			}
			break;
		    case 1: // Node.ELEMENT_NODE
			node = node.childNodes[pos];
			node.parentNode.insertBefore(toBeInserted, node);
			range.setStart(node, 0);
			range.setEnd(node, 0);
			break;
		}
		sel.addRange(range);
	} else {
		return null;	// this function not yet used for IE <FIXME>
	}
};

/** Call this function to insert HTML code at the current position.  It deletes
 * the selection, if any.
 */
HTMLArea.prototype.insertHTML = function(html) {
	var sel = this._getSelection();
	var range = this._createRange(sel);
	if (HTMLArea.is_ie) {
		range.pasteHTML(html);
	} else {
		// construct a new document fragment with the given HTML
		var fragment = this._doc.createDocumentFragment();
		var div = this._doc.createElement("div");
		div.innerHTML = html;
		while (div.firstChild) {
			// the following call also removes the node from div
			fragment.appendChild(div.firstChild);
		}
		// this also removes the selection
		var node = this.insertNodeAtSelection(fragment);
	}
};

/**
 *  Call this function to surround the existing HTML code in the selection with
 *  your tags.
 */
HTMLArea.prototype.surroundHTML = function(startTag, endTag) {
	var html = this.getSelectedHTML();
	// the following also deletes the selection
	this.insertHTML(startTag + html + endTag);
};

/// Retrieve the selected block
HTMLArea.prototype.getSelectedHTML = function() {
	var sel = this._getSelection();
	var range = this._createRange(sel);
	var existing = null;
	if (HTMLArea.is_ie) {
		existing = range.htmlText;
	} else {
		existing = HTMLArea.getHTML(range.cloneContents(), false);
	}
	return existing;
};

// Called when the user clicks on "InsertImage" button
HTMLArea.prototype._insertImage = function() {
	var editor = this;	// for nested functions
	this._popupDialog("insert_image.html", function(param) {
		if (!param) {	// user must have pressed Cancel
			return false;
		}
		var sel = editor._getSelection();
		var range = editor._createRange(sel);
		editor._doc.execCommand("insertimage", false, param["f_url"]);
		var img = null;
		if (HTMLArea.is_ie) {
			img = range.parentElement();
			// wonder if this works...
			if (img.tagName.toLowerCase() != "img") {
				img = img.previousSibling;
			}
		} else {
			img = range.startContainer.previousSibling;
		}
		for (field in param) {
			var value = param[field];
			if (!value) {
				continue;
			}
			switch (field) {
			    case "f_alt"    : img.alt	 = value; break;
			    case "f_border" : img.border = parseInt(value); break;
			    case "f_align"  : img.align	 = value; break;
			    case "f_vert"   : img.vspace = parseInt(value); break;
			    case "f_horiz"  : img.hspace = parseInt(value); break;
			}
		}
	}, null);
};

// Called when the user clicks the Insert Table button
HTMLArea.prototype._insertTable = function() {
	var sel = this._getSelection();
	var range = this._createRange(sel);
	var editor = this;	// for nested functions
	this._popupDialog("insert_table.html", function(param) {
		if (!param) {	// user must have pressed Cancel
			return false;
		}
		var doc = editor._doc;
		// create the table element
		var table = doc.createElement("table");
		// assign the given arguments
		for (var field in param) {
			var value = param[field];
			if (!value) {
				continue;
			}
			switch (field) {
			    case "f_width"   : table.style.width = value + param["f_unit"]; break;
			    case "f_align"   : table.align	 = value; break;
			    case "f_border"  : table.border	 = parseInt(value); break;
			    case "f_spacing" : table.cellspacing = parseInt(value); break;
			    case "f_padding" : table.cellpadding = parseInt(value); break;
			}
		}
		var tbody = doc.createElement("tbody");
		table.appendChild(tbody);
		for (var i = 0; i < param["f_rows"]; ++i) {
			var tr = doc.createElement("tr");
			tbody.appendChild(tr);
			for (var j = 0; j < param["f_cols"]; ++j) {
				var td = doc.createElement("td");
				tr.appendChild(td);
				// Mozilla likes to see something inside the cell.
				(HTMLArea.is_gecko) && td.appendChild(doc.createElement("br"));
			}
		}
		if (HTMLArea.is_ie) {
			range.pasteHTML(table.outerHTML);
		} else {
			// insert the table
			editor.insertNodeAtSelection(table);
		}
		return true;
	}, null);
};

/***************************************************
 *  Category: EVENT HANDLERS
 ***************************************************/

// el is reference to the SELECT object
// txt is the name of the select field, as in config.toolbar
HTMLArea.prototype._comboSelected = function(el, txt) {
	this.focusEditor();
	var value = el.options[el.selectedIndex].value;
	switch (txt) {
	    case "fontname":
	    case "fontsize": this.execCommand(txt, false, value); break;
	    case "formatblock":
		(HTMLArea.is_ie) && (value = "<" + value + ">");
		this.execCommand(txt, false, value);
		break;
	    default: alert("FIXME: combo box " + txt + " not implemented");
	}
};

// the execCommand function (intercepts some commands and replaces them with
// our own implementation)
HTMLArea.prototype.execCommand = function(cmdID, UI, param) {
	var editor = this;	// for nested functions
	this.focusEditor();
	switch (cmdID.toLowerCase()) {
	    case "htmlmode" : this.setMode(); break;
	    case "hilitecolor":
		(HTMLArea.is_ie) && (cmdID = "backcolor");
	    case "forecolor":
		this._popupDialog("select_color.html", function(color) {
			editor._doc.execCommand(cmdID, false, "#" + color);
		}, HTMLArea._colorToRgb(this._doc.queryCommandValue(cmdID)));
		break;
	    case "createlink":
		if (HTMLArea.is_ie || !UI) {
			this._doc.execCommand(cmdID, UI, param);
		} else {
			// browser is Mozilla & wants UI
			var param;
			if ((param = prompt("Enter URL"))) {
				this._doc.execCommand(cmdID, false, param);
			}
		}
		break;
	    case "popupeditor":
		if (HTMLArea.is_ie) {
			window.open(this.popupURL("fullscreen.html"), "ha_fullscreen",
				    "toolbar=no,location=no,directories=no,status=yes,menubar=no," +
				    "scrollbars=no,resizable=yes,width=640,height=480");
		} else {
			window.open(this.popupURL("fullscreen.html"), "ha_fullscreen",
				    "toolbar=no,menubar=no,personalbar=no,width=640,height=480," +
				    "scrollbars=no,resizable=yes");
		}
		// pass this object to the newly opened window
		HTMLArea._object = this;
		break;
	    case "inserttable": this._insertTable(); break;
	    case "insertimage": this._insertImage(); break;
	    case "about"    : this._popupDialog("about.html", null, null); break;
	    case "showhelp" : window.open("reference.html", "ha_help"); break;
	    default: this._doc.execCommand(cmdID, UI, param);
	}
	this.updateToolbar();
	return false;
};

/** A generic event handler for things that happen in the IFRAME's document.
 * This function also handles key bindings. */
HTMLArea.prototype._editorEvent = function(ev) {
	var editor = this;
	var keyEvent = (HTMLArea.is_ie && ev.type == "keydown") || (ev.type == "keypress");
	if (keyEvent && ev.ctrlKey) {
		var sel = null;
		var range = null;
		var key = String.fromCharCode(HTMLArea.is_ie ? ev.keyCode : ev.charCode).toLowerCase();
		var cmd = null;
		var value = null;
		switch (key) {
		    case 'a':
			if (!HTMLArea.is_ie) {
				// KEY select all
				sel = this._getSelection();
				sel.removeAllRanges();
				range = this._createRange();
				range.selectNodeContents(this._doc.body);
				sel.addRange(range);
				HTMLArea._stopEvent(ev);
			}
			break;

			// simple key commands follow

		    case 'b': cmd = "bold"; break;
		    case 'i': cmd = "italic"; break;
		    case 'u': cmd = "underline"; break;
		    case 's': cmd = "strikethrough"; break;
		    case 'l': cmd = "justifyleft"; break;
		    case 'c': cmd = "justifycenter"; break;
		    case 'r': cmd = "justifyright"; break;
		    case 'j': cmd = "justifyfull"; break;

			// headings
		    case '1':
		    case '2':
		    case '3':
		    case '4':
		    case '5':
		    case '6':
			cmd = "formatblock";
			value = "h" + key;
			if (HTMLArea.is_ie) {
				value = "<" + value + ">";
			}
			break;
		}
		if (cmd) {
			// execute simple command
			this.execCommand(cmd, false, value);
			HTMLArea._stopEvent(ev);
		}
	}
	/*
	else if (keyEvent) {
		// other keys here
		switch (ev.keyCode) {
		    case 13: // KEY enter
			// if (HTMLArea.is_ie) {
			this.insertHTML("<br />");
			HTMLArea._stopEvent(ev);
			// }
			break;
		}
	}
	*/
	// update the toolbar state after some time
	setTimeout(function() {
		editor.updateToolbar();
	}, 50);
};

// retrieve the HTML
HTMLArea.prototype.getHTML = function() {
	switch (this._editMode) {
	    case "wysiwyg"  : return HTMLArea.getHTML(this._doc.body, false);
	    case "textmode" : return this._textArea.value;
	    default	    : alert("Mode <" + mode + "> not defined!");
	}
	return false;
};

// retrieve the HTML (fastest version, but uses innerHTML)
HTMLArea.prototype.getInnerHTML = function() {
	switch (this._editMode) {
	    case "wysiwyg"  : return this._doc.body.innerHTML;
	    case "textmode" : return this._textArea.value;
	    default	    : alert("Mode <" + mode + "> not defined!");
	}
	return false;
};

// completely change the HTML inside
HTMLArea.prototype.setHTML = function(html) {
	switch (this._editMode) {
	    case "wysiwyg"  : this._doc.body.innerHTML = html; break;
	    case "textmode" : this._textArea.value = html; break;
	    default	    : alert("Mode <" + mode + "> not defined!");
	}
	return false;
};

/***************************************************
 *  Category: UTILITY FUNCTIONS
 ***************************************************/

// browser identification

HTMLArea.agt = navigator.userAgent.toLowerCase();
HTMLArea.is_ie	   = ((HTMLArea.agt.indexOf("msie") != -1) && (HTMLArea.agt.indexOf("opera") == -1));
HTMLArea.is_opera  = (HTMLArea.agt.indexOf("opera") != -1);
HTMLArea.is_mac	   = (HTMLArea.agt.indexOf("mac") != -1);
HTMLArea.is_mac_ie = (HTMLArea.is_ie && HTMLArea.is_mac);
HTMLArea.is_win_ie = (HTMLArea.is_ie && !HTMLArea.is_mac);
HTMLArea.is_gecko  = (navigator.product == "Gecko");

// variable used to pass the object to the popup editor window.
HTMLArea._object = null;

// FIXME!!! this should return false for IE < 5.5
HTMLArea.checkSupportedBrowser = function() {
	if (HTMLArea.is_gecko) {
		if (navigator.productSub < 20021201) {
			alert("You need at least Mozilla-1.3 Alpha.\n" +
			      "Sorry, your Gecko is not supported.");
			return false;
		}
		if (navigator.productSub < 20030210) {
			alert("Mozilla < 1.3 Beta is not supported!\n" +
			      "I'll try, though, but it might not work.");
		}
	}
	return HTMLArea.is_gecko || HTMLArea.is_ie;
};

// selection & ranges

// returns the current selection object
HTMLArea.prototype._getSelection = function() {
	if (HTMLArea.is_ie) {
		return this._doc.selection;
	} else {
		return this._iframe.contentWindow.getSelection();
	}
};

// returns a range for the current selection
HTMLArea.prototype._createRange = function(sel) {
	if (HTMLArea.is_ie) {
		return sel.createRange();
	} else {
		this.focusEditor();
		if (typeof sel != "undefined") {
			return sel.getRangeAt(0);
		} else {
			return this._doc.createRange();
		}
	}
};

// event handling

HTMLArea._addEvent = function(el, evname, func) {
	if (HTMLArea.is_ie) {
		el.attachEvent("on" + evname, func);
	} else {
		el.addEventListener(evname, func, true);
	}
};

HTMLArea._addEvents = function(el, evs, func) {
	for (var i in evs) {
		HTMLArea._addEvent(el, evs[i], func);
	}
};

HTMLArea._removeEvent = function(el, evname, func) {
	if (HTMLArea.is_ie) {
		el.detachEvent("on" + evname, func);
	} else {
		el.removeEventListener(evname, func, true);
	}
};

HTMLArea._removeEvents = function(el, evs, func) {
	for (var i in evs) {
		HTMLArea._removeEvent(el, evs[i], func);
	}
};

HTMLArea._stopEvent = function(ev) {
	if (HTMLArea.is_ie) {
		ev.cancelBubble = true;
		ev.returnValue = false;
	} else {
		ev.preventDefault();
		ev.stopPropagation();
	}
};

HTMLArea._removeClass = function(el, className) {
	if (!(el && el.className)) {
		return;
	}
	var cls = el.className.split(" ");
	var ar = new Array();
	for (var i = cls.length; i > 0;) {
		if (cls[--i] != className) {
			ar[ar.length] = cls[i];
		}
	}
	el.className = ar.join(" ");
};

HTMLArea._addClass = function(el, className) {
	// remove the class first, if already there
	HTMLArea._removeClass(el, className);
	el.className += " " + className;
};

HTMLArea._hasClass = function(el, className) {
	if (!(el && el.className)) {
		return false;
	}
	var cls = el.className.split(" ");
	for (var i = cls.length; i > 0;) {
		if (cls[--i] == className) {
			return true;
		}
	}
	return false;
};

HTMLArea.isBlockElement = function(el) {
	var blockTags = " body form textarea fieldset ul ol dl li div " +
		"p h1 h2 h3 h4 h5 h6 quote pre table thead " +
		"tbody tfoot tr td iframe address ";
	return (blockTags.indexOf(" " + el.tagName.toLowerCase() + " ") != -1);
};

HTMLArea.needsClosingTag = function(el) {
	var closingTags = " script style div span ";
	return (closingTags.indexOf(" " + el.tagName.toLowerCase() + " ") != -1);
};

// performs HTML encoding of some given string
HTMLArea.htmlEncode = function(str) {
	// we don't need regexp for that, but.. so be it for now.
	str = str.replace(/&/ig, "&amp;");
	str = str.replace(/</ig, "&lt;");
	str = str.replace(/>/ig, "&gt;");
	str = str.replace(/\x22/ig, "&quot;");
	// \x22 means '"' -- we use hex reprezentation so that we don't disturb
	// JS compressors (well, at least mine fails.. ;)
	return str;
};

// Retrieves the HTML code from the given node.	 This is a replacement for
// getting innerHTML, using standard DOM calls.
HTMLArea.getHTML = function(root, outputRoot) {
	var html = "";
	switch (root.nodeType) {
	    case 1: // Node.ELEMENT_NODE
	    case 11: // Node.DOCUMENT_FRAGMENT_NODE
		var closed;
		var i;
		if (outputRoot) {
			closed = (!(root.hasChildNodes() || HTMLArea.needsClosingTag(root)));
			html = "<" + root.tagName.toLowerCase();
			var attrs = root.attributes;
			for (i = 0; i < attrs.length; ++i) {
				var a = attrs.item(i);
				if (!a.specified) {
					continue;
				}
				var name = a.nodeName.toLowerCase();
				if (/_moz/.test(name)) {
					// Mozilla reports some special tags
					// here; we don't need them.
					continue;
				}
				var value;
				if (name != "style") {
					// IE5.5 reports 25 when cellSpacing is
					// 1; other values might be doomed too.
					// For this reason we extract the
					// values directly from the root node.
					// I'm starting to HATE JavaScript
					// development.  Browser differences
					// suck.
					if (typeof root[a.nodeName] != "undefined") {
						value = root[a.nodeName];
					} else {
						value = a.nodeValue;
					}
				} else { // IE fails to put style in attributes list
					// FIXME: cssText reported by IE is UPPERCASE
					value = root.style.cssText;
				}
				if (/_moz/.test(value)) {
					// Mozilla reports some special tags
					// here; we don't need them.
					continue;
				}
				html += " " + name + '="' + value + '"';
			}
			html += closed ? " />" : ">";
		}
		for (i = root.firstChild; i; i = i.nextSibling) {
			html += HTMLArea.getHTML(i, true);
		}
		if (outputRoot && !closed) {
			html += "</" + root.tagName.toLowerCase() + ">";
		}
		break;
	    case 3: // Node.TEXT_NODE
		html = HTMLArea.htmlEncode(root.data);
		break;
	    case 8: // Node.COMMENT_NODE
		html = "<!--" + root.data + "-->";
		break;		// skip comments, for now.
	}
	return html;
};

// creates a rgb-style color from a number
HTMLArea._makeColor = function(v) {
	if (typeof v != "number") {
		// already in rgb (hopefully); IE doesn't get here.
		return v;
	}
	// IE sends number; convert to rgb.
	var r = v & 0xFF;
	var g = (v >> 8) & 0xFF;
	var b = (v >> 16) & 0xFF;
	return "rgb(" + r + "," + g + "," + b + ")";
};

// returns hexadecimal color representation from a number or a rgb-style color.
HTMLArea._colorToRgb = function(v) {
	// returns the hex representation of one byte (2 digits)
	function hex(d) {
		return (d < 16) ? ("0" + d.toString(16)) : d.toString(16);
	};

	if (typeof v == "number") {
		// we're talking to IE here
		var r = v & 0xFF;
		var g = (v >> 8) & 0xFF;
		var b = (v >> 16) & 0xFF;
		return "#" + hex(r) + hex(g) + hex(b);
	}

	if (v.substr(0, 3) == "rgb") {
		// in rgb(...) form -- Mozilla
		var re = /rgb\s*\(\s*([0-9]+)\s*,\s*([0-9]+)\s*,\s*([0-9]+)\s*\)/;
		if (v.match(re)) {
			var r = parseInt(RegExp.$1);
			var g = parseInt(RegExp.$2);
			var b = parseInt(RegExp.$3);
			return "#" + hex(r) + hex(g) + hex(b);
		}
		// doesn't match RE?!  maybe uses percentages or float numbers
		// -- FIXME: not yet implemented.
		return null;
	}

	if (v[0] == "#") {
		// already hex rgb (hopefully :D )
		return v;
	}

	// if everything else fails ;)
	return null;
};

// modal dialogs for Mozilla (for IE we're using the showModalDialog() call).

// receives an URL to the popup dialog and a function that receives one value;
// this function will get called after the dialog is closed, with the return
// value of the dialog.
HTMLArea.prototype._popupDialog = function(url, action, init) {
	Dialog(this.popupURL(url), action, init);
};

// paths

HTMLArea.prototype.imgURL = function(file) {
	return this.config.editorURL + this.config.imgURL + file;
};

HTMLArea.prototype.popupURL = function(file) {
	return this.config.editorURL + this.config.popupURL + file;
};

// EOF
// Local variables: //
// c-basic-offset:8 //
// indent-tabs-mode:t //
// End: //
