dojo.provide("dijit._editor.plugins.LinkDialog");

dojo.require("dijit._Widget");
dojo.require("dijit._Templated");
dojo.require("dijit._editor._Plugin");
dojo.require("dijit.TooltipDialog");
dojo.require("dijit.form.Button");
dojo.require("dijit.form.ValidationTextBox");
dojo.require("dijit.form.Select");
dojo.require("dijit._editor.range");
dojo.require("dojo.i18n");
dojo.require("dojo.string");
dojo.requireLocalization("dijit", "common");
dojo.requireLocalization("dijit._editor", "LinkDialog");

dojo.declare("dijit._editor.plugins.LinkDialog", dijit._editor._Plugin, {
	// summary:
	//		This plugin provides the basis for an 'anchor' (link) dialog and an extension of it
	//		provides the image link dialog.
	//
	// description:
	//		The command provided by this plugin is:
	//		* createLink

	// Override _Plugin.buttonClass.   This plugin is controlled by a DropDownButton
	// (which triggers a TooltipDialog).
	buttonClass: dijit.form.DropDownButton,

	// Override _Plugin.useDefaultCommand... processing is handled by this plugin, not by dijit.Editor.
	useDefaultCommand: false,

	// urlRegExp: [protected] String
	//		Used for validating input as correct URL.  While file:// urls are not terribly
	//		useful, they are technically valid.
	urlRegExp: "((https?|ftps?|file)\\://|\./|/|)(/[a-zA-Z]{1,1}:/|)(((?:(?:[\\da-zA-Z](?:[-\\da-zA-Z]{0,61}[\\da-zA-Z])?)\\.)*(?:[a-zA-Z](?:[-\\da-zA-Z]{0,80}[\\da-zA-Z])?)\\.?)|(((\\d|[1-9]\\d|1\\d\\d|2[0-4]\\d|25[0-5])\\.){3}(\\d|[1-9]\\d|1\\d\\d|2[0-4]\\d|25[0-5])|(0[xX]0*[\\da-fA-F]?[\\da-fA-F]\\.){3}0[xX]0*[\\da-fA-F]?[\\da-fA-F]|(0+[0-3][0-7][0-7]\\.){3}0+[0-3][0-7][0-7]|(0|[1-9]\\d{0,8}|[1-3]\\d{9}|4[01]\\d{8}|42[0-8]\\d{7}|429[0-3]\\d{6}|4294[0-8]\\d{5}|42949[0-5]\\d{4}|429496[0-6]\\d{3}|4294967[01]\\d{2}|42949672[0-8]\\d|429496729[0-5])|0[xX]0*[\\da-fA-F]{1,8}|([\\da-fA-F]{1,4}\\:){7}[\\da-fA-F]{1,4}|([\\da-fA-F]{1,4}\\:){6}((\\d|[1-9]\\d|1\\d\\d|2[0-4]\\d|25[0-5])\\.){3}(\\d|[1-9]\\d|1\\d\\d|2[0-4]\\d|25[0-5])))(\\:\\d+)?(/(?:[^?#\\s/]+/)*(?:[^?#\\s/]+(?:\\?[^?#\\s/]*)?(?:#.*)?)?)?",

	// emailRegExp: [protected] String
	//		Used for validating input as correct email address.  Taken from dojox.validate
	emailRegExp:  "<?(mailto\\:)([!#-'*+\\-\\/-9=?A-Z^-~]+[.])*[!#-'*+\\-\\/-9=?A-Z^-~]+" /*username*/ + "@" +  
        "((?:(?:[\\da-zA-Z](?:[-\\da-zA-Z]{0,61}[\\da-zA-Z])?)\\.)+(?:[a-zA-Z](?:[-\\da-zA-Z]{0,6}[\\da-zA-Z])?)\\.?)|localhost|^[^-][a-zA-Z0-9_-]*>?",	// host.

	// htmlTemplate: [protected] String
	//		String used for templating the HTML to insert at the desired point.
	htmlTemplate: "<a href=\"${urlInput}\" _djrealurl=\"${urlInput}\"" +
		" target=\"${targetSelect}\"" +
		">${textInput}</a>",

	// tag: [protected] String
	//		Tag used for the link type.
	tag: "a",

	// _hostRxp [private] RegExp
	//		Regular expression used to validate url fragments (ip address, hostname, etc)
	_hostRxp:  new RegExp("^((([^\\[:]+):)?([^@]+)@)?(\\[([^\\]]+)\\]|([^\\[:]*))(:([0-9]+))?$"),

	// _userAtRxp [private] RegExp
	//		Regular expression used to validate e-mail address fragment.
	_userAtRxp: new RegExp("^([!#-'*+\\-\\/-9=?A-Z^-~]+[.])*[!#-'*+\\-\\/-9=?A-Z^-~]+@", "i"),

	// linkDialogTemplate: [protected] String
	//		Template for contents of TooltipDialog to pick URL
	linkDialogTemplate: [
		"<table><tr><td>",
		"<label for='${id}_urlInput'>${url}</label>",
		"</td><td>",
		"<input dojoType='dijit.form.ValidationTextBox' required='true' " +
		"id='${id}_urlInput' name='urlInput' intermediateChanges='true'>",
		"</td></tr><tr><td>",
		"<label for='${id}_textInput'>${text}</label>",
		"</td><td>",
		"<input dojoType='dijit.form.ValidationTextBox' required='true' id='${id}_textInput' " +
		"name='textInput' intermediateChanges='true'>",
		"</td></tr><tr><td>",
		"<label for='${id}_targetSelect'>${target}</label>",
		"</td><td>",
		"<select id='${id}_targetSelect' name='targetSelect' dojoType='dijit.form.Select'>",
		"<option selected='selected' value='_self'>${currentWindow}</option>",
		"<option value='_blank'>${newWindow}</option>",
		"<option value='_top'>${topWindow}</option>",
		"<option value='_parent'>${parentWindow}</option>",
		"</select>",
		"</td></tr><tr><td colspan='2'>",
		"<button dojoType='dijit.form.Button' type='submit' id='${id}_setButton'>${set}</button>",
		"<button dojoType='dijit.form.Button' type='button' id='${id}_cancelButton'>${buttonCancel}</button>",
		"</td></tr></table>"
	].join(""),

	_initButton: function(){
		// Override _Plugin._initButton() to initialize DropDownButton and TooltipDialog.
		var _this = this;
		this.tag = this.command == 'insertImage' ? 'img' : 'a';
		var messages = dojo.mixin(dojo.i18n.getLocalization("dijit", "common", this.lang),
			dojo.i18n.getLocalization("dijit._editor", "LinkDialog", this.lang));
		var dropDown = (this.dropDown = new dijit.TooltipDialog({
			title: messages[this.command + "Title"],
			execute: dojo.hitch(this, "setValue"),
			onOpen: function(){
				_this._onOpenDialog();
				dijit.TooltipDialog.prototype.onOpen.apply(this, arguments);
			},
			onCancel: function(){
				setTimeout(dojo.hitch(_this, "_onCloseDialog"),0);
			}
		}));
		messages.urlRegExp = this.urlRegExp;
		messages.id = dijit.getUniqueId(this.editor.id);
		this._uniqueId = messages.id;
		this._setContent(dropDown.title +
			"<div style='border-bottom: 1px black solid;padding-bottom:2pt;margin-bottom:4pt'></div>" +
			dojo.string.substitute(this.linkDialogTemplate, messages));
		dropDown.startup();
		this._urlInput = dijit.byId(this._uniqueId + "_urlInput");
		this._textInput = dijit.byId(this._uniqueId + "_textInput");
		this._setButton = dijit.byId(this._uniqueId + "_setButton");
		this.connect(dijit.byId(this._uniqueId + "_cancelButton"), "onClick", function(){
			this.dropDown.onCancel();
		});
		if(this._urlInput){
			this.connect(this._urlInput, "onChange", "_checkAndFixInput");
		}
		if(this._textInput){
			this.connect(this._textInput, "onChange", "_checkAndFixInput");
		}

		// Build up the dual check for http/https/file:, and mailto formats.
		this._urlRegExp = new RegExp("^" + this.urlRegExp + "$", "i");
		this._emailRegExp = new RegExp("^" + this.emailRegExp + "$", "i");
		this._urlInput.isValid = dojo.hitch(this, function(){
			// Function over-ride of isValid to test if the input matches a url or a mailto style link.
			var value = this._urlInput.get("value");
			return this._urlRegExp.test(value) || this._emailRegExp.test(value);
		});

		this._connectTagEvents();
		this.inherited(arguments);
	},

	_checkAndFixInput: function(){
		// summary:
		//		A function to listen for onChange events and test the input contents
		//		for valid information, such as valid urls with http/https/ftp and if
		//		not present, try and guess if the input url is relative or not, and if
		//		not, append http:// to it.  Also validates other fields as determined by
		//		the internal _isValid function.
		var self = this;
		var url = this._urlInput.get("value");
		var fixupUrl = function(url){
			var appendHttp = false;
			var appendMailto = false;
			if(url && url.length > 1){
				url = dojo.trim(url);
				if(url.indexOf("mailto:") !== 0){
					if(url.indexOf("/") > 0){
						if(url.indexOf("://") === -1){
							// Check that it doesn't start with / or ./, which would
							// imply 'target server relativeness'
							if(url.charAt(0) !== '/' && url.indexOf("./") !== 0){
								if(self._hostRxp.test(url)){
									appendHttp = true;
								}
							}
						}
					}else if(self._userAtRxp.test(url)){
						// If it looks like a foo@, append a mailto.
						appendMailto = true;
					}
				}
			}
			if(appendHttp){
				self._urlInput.set("value", "http://" + url);
			}
			if(appendMailto){
				self._urlInput.set("value", "mailto:" + url);
			}
			self._setButton.set("disabled", !self._isValid());
		};
		if(this._delayedCheck){
			clearTimeout(this._delayedCheck);
			this._delayedCheck = null;
		}
		this._delayedCheck = setTimeout(function(){
			fixupUrl(url);
		}, 250);
	},

	_connectTagEvents: function(){
		// summary:
		//		Over-ridable function that connects tag specific events.
		this.editor.onLoadDeferred.addCallback(dojo.hitch(this, function(){
			this.connect(this.editor.editNode, "ondblclick", this._onDblClick);
		}));
	},

	_isValid: function(){
		// summary:
		//		Internal function to allow validating of the inputs
		//		for a link to determine if set should be disabled or not
		// tags:
		//		protected
		return this._urlInput.isValid() && this._textInput.isValid();
	},

	_setContent: function(staticPanel){
		// summary:
		//		Helper for _initButton above.   Not sure why it's a separate method.
		this.dropDown.set('content', staticPanel);
	},

	_checkValues: function(args){
		// summary:
		//		Function to check the values in args and 'fix' them up as needed.
		// args: Object
		//		Content being set.		
		// tags: 
		//		protected
		if(args && args.urlInput){
			args.urlInput = args.urlInput.replace(/"/g, "&quot;");
		}
		return args;
	},

	setValue: function(args){
		// summary:
		//		Callback from the dialog when user presses "set" button.
		// tags:
		//		private
		//TODO: prevent closing popup if the text is empty
		this._onCloseDialog();
		if(dojo.isIE){ //see #4151
			var sel = dijit.range.getSelection(this.editor.window);
			var range = sel.getRangeAt(0);
			var a = range.endContainer;
			if(a.nodeType === 3){
				// Text node, may be the link contents, so check parent.
				// This plugin doesn't really support nested HTML elements
				// in the link, it assumes all link content is text.
				a = a.parentNode;
			}
			if(a && (a.nodeName && a.nodeName.toLowerCase() !== this.tag)){
				// Stll nothing, one last thing to try on IE, as it might be 'img'
				// and thus considered a control.
				a = dojo.withGlobal(this.editor.window,
					"getSelectedElement", dijit._editor.selection, [this.tag]);
			}
			if(a && (a.nodeName && a.nodeName.toLowerCase() === this.tag)){
				// Okay, we do have a match.  IE, for some reason, sometimes pastes before
				// instead of removing the targetted paste-over element, so we unlink the
				// old one first.  If we do not the <a> tag remains, but it has no content,
				// so isn't readily visible (but is wrong for the action).
				if(this.editor.queryCommandEnabled("unlink")){
					// Select all the link childent, then unlink.  The following insert will
					// then replace the selected text.
					dojo.withGlobal(this.editor.window,
						"selectElementChildren", dijit._editor.selection, [a]);
					this.editor.execCommand("unlink");
				}
			}
		}
		// make sure values are properly escaped, etc.
		args = this._checkValues(args); 
		this.editor.execCommand('inserthtml',
			dojo.string.substitute(this.htmlTemplate, args));
	},

	_onCloseDialog: function(){
		// summary:
		//		Handler for close event on the dialog
		this.editor.focus();
	},

	_getCurrentValues: function(a){
		// summary:
		//		Over-ride for getting the values to set in the dropdown.
		// a:
		//		The anchor/link to process for data for the dropdown.
		// tags:
		//		protected
		var url, text, target;
		if(a && a.tagName.toLowerCase() === this.tag){
			url = a.getAttribute('_djrealurl') || a.getAttribute('href');
			target = a.getAttribute('target') || "_self";
			text = a.textContent || a.innerText;
			dojo.withGlobal(this.editor.window, "selectElement", dijit._editor.selection, [a, true]);
		}else{
			text = dojo.withGlobal(this.editor.window, dijit._editor.selection.getSelectedText);
		}
		return {urlInput: url || '', textInput: text || '', targetSelect: target || ''}; //Object;
	},

	_onOpenDialog: function(){
		// summary:
		//		Handler for when the dialog is opened.
		//		If the caret is currently in a URL then populate the URL's info into the dialog.
		var a;
		if(dojo.isIE){
			// IE is difficult to select the element in, using the range unified
			// API seems to work reasonably well.
			var sel = dijit.range.getSelection(this.editor.window);
			var range = sel.getRangeAt(0);
			a = range.endContainer;
			if(a.nodeType === 3){
				// Text node, may be the link contents, so check parent.
				// This plugin doesn't really support nested HTML elements
				// in the link, it assumes all link content is text.
				a = a.parentNode;
			}
			if(a && (a.nodeName && a.nodeName.toLowerCase() !== this.tag)){
				// Stll nothing, one last thing to try on IE, as it might be 'img'
				// and thus considered a control.
				a = dojo.withGlobal(this.editor.window,
					"getSelectedElement", dijit._editor.selection, [this.tag]);
			}
		}else{
			a = dojo.withGlobal(this.editor.window,
				"getAncestorElement", dijit._editor.selection, [this.tag]);
		}
		this.dropDown.reset();
		this._setButton.set("disabled", true);
		this.dropDown.set("value", this._getCurrentValues(a));
	},

	_onDblClick: function(e){
		// summary:
		// 		Function to define a behavior on double clicks on the element
		//		type this dialog edits to select it and pop up the editor
		//		dialog.
		// e: Object
		//		The double-click event.
		// tags:
		//		protected.
		if(e && e.target){
			var t = e.target;
			var tg = t.tagName? t.tagName.toLowerCase() : "";
			if(tg === this.tag && dojo.attr(t,"href")){
				dojo.withGlobal(this.editor.window,
					 "selectElement",
					 dijit._editor.selection, [t]);
				this.editor.onDisplayChanged();
				setTimeout(dojo.hitch(this, function(){
					// Focus shift outside the event handler.
					// IE doesn't like focus changes in event handles.
					this.button.set("disabled", false);
					this.button.openDropDown();
				}), 10);
			}
		}
	}
});

dojo.declare("dijit._editor.plugins.ImgLinkDialog", [dijit._editor.plugins.LinkDialog], {
	// summary:
	//		This plugin extends LinkDialog and adds in a plugin for handling image links.
	//		provides the image link dialog.
	//
	// description:
	//		The command provided by this plugin is:
	//		* insertImage

	// linkDialogTemplate: [protected] String
	//		Over-ride for template since img dialog doesn't need target that anchor tags may.
	linkDialogTemplate: [
		"<table><tr><td>",
		"<label for='${id}_urlInput'>${url}</label>",
		"</td><td>",
		"<input dojoType='dijit.form.ValidationTextBox' regExp='${urlRegExp}' " +
		"required='true' id='${id}_urlInput' name='urlInput' intermediateChanges='true'>",
		"</td></tr><tr><td>",
		"<label for='${id}_textInput'>${text}</label>",
		"</td><td>",
		"<input dojoType='dijit.form.ValidationTextBox' required='false' id='${id}_textInput' " +
		"name='textInput' intermediateChanges='true'>",
		"</td></tr><tr><td>",
		"</td><td>",
		"</td></tr><tr><td colspan='2'>",
		"<button dojoType='dijit.form.Button' type='submit' id='${id}_setButton'>${set}</button>",
		"<button dojoType='dijit.form.Button' type='button' id='${id}_cancelButton'>${buttonCancel}</button>",
		"</td></tr></table>"
	].join(""),

	// htmlTemplate: [protected] String
	//		String used for templating the <img> HTML to insert at the desired point.
	htmlTemplate: "<img src=\"${urlInput}\" _djrealurl=\"${urlInput}\" alt=\"${textInput}\" />",

	// tag: [protected] String
	//		Tag used for the link type (img).
	tag: "img",

	_getCurrentValues: function(img){
		// summary:
		//		Over-ride for getting the values to set in the dropdown.
		// a:
		//		The anchor/link to process for data for the dropdown.
		// tags:
		//		protected
		var url, text;
		if(img && img.tagName.toLowerCase() === this.tag){
			url = img.getAttribute('_djrealurl') || img.getAttribute('src');
			text = img.getAttribute('alt');
			dojo.withGlobal(this.editor.window,
				"selectElement", dijit._editor.selection, [img, true]);
		}else{
			text = dojo.withGlobal(this.editor.window, dijit._editor.selection.getSelectedText);
		}
		return {urlInput: url || '', textInput: text || ''}; //Object;
	},

	_isValid: function(){
		// summary:
		//		Over-ride for images.  You can have alt text of blank, it is valid.
		// tags:
		//		protected
		return this._urlInput.isValid();
	},

	_connectTagEvents: function(){
		// summary:
		//		Over-ridable function that connects tag specific events.
		this.inherited(arguments);
		this.editor.onLoadDeferred.addCallback(dojo.hitch(this, function(){
			// Use onmousedown instead of onclick.  Seems that IE eats the first onclick
			// to wrap it in a selector box, then the second one acts as onclick.  See #10420
			this.connect(this.editor.editNode, "onmousedown", this._selectTag);
		}));
	},

	_selectTag: function(e){
		// summary:
		//		A simple event handler that lets me select an image if it is clicked on.
		//		makes it easier to select images in a standard way across browsers.  Otherwise
		//		selecting an image for edit becomes difficult.
		// e: Event
		//		The mousedown event.
		// tags:
		//		private
		if(e && e.target){
			var t = e.target;
			var tg = t.tagName? t.tagName.toLowerCase() : "";
			if(tg === this.tag){
				dojo.withGlobal(this.editor.window,
					"selectElement",
					dijit._editor.selection, [t]);
			}
		}
	},

	_checkValues: function(args){
		// summary:
		//		Function to check the values in args and 'fix' them up as needed 
		//		(special characters in the url or alt text)
		// args: Object
		//		Content being set.		
		// tags: 
		//		protected
		if(args && args.urlInput){
			args.urlInput = args.urlInput.replace(/"/g, "&quot;");
		}
		if(args && args.textInput){
			args.textInput = args.textInput.replace(/"/g, "&quot;");
		}
		return args;
	},

	_onDblClick: function(e){
		// summary:
		// 		Function to define a behavior on double clicks on the element
		//		type this dialog edits to select it and pop up the editor
		//		dialog.
		// e: Object
		//		The double-click event.
		// tags:
		//		protected.
		if(e && e.target){
			var t = e.target;
			var tg = t.tagName? t.tagName.toLowerCase() : "";
			if(tg === this.tag && dojo.attr(t,"src")){
				dojo.withGlobal(this.editor.window,
					 "selectElement",
					 dijit._editor.selection, [t]);
				this.editor.onDisplayChanged();
				setTimeout(dojo.hitch(this, function(){
					// Focus shift outside the event handler.
					// IE doesn't like focus changes in event handles.
					this.button.set("disabled", false);
					this.button.openDropDown();
				}), 10);
			}
		}
	}
});

// Register this plugin.
dojo.subscribe(dijit._scopeName + ".Editor.getPlugin",null,function(o){
	if(o.plugin){ return; }
	switch(o.args.name){
		case "createLink":
			o.plugin = new dijit._editor.plugins.LinkDialog({command: o.args.name});
			break;
		case "insertImage":
			o.plugin = new dijit._editor.plugins.ImgLinkDialog({command: o.args.name});
			break;
	}
});
