/**
 * ColorSplitButton.js
 *
 * Copyright 2009, Moxiecode Systems AB
 * Released under LGPL License.
 *
 * License: http://tinymce.moxiecode.com/license
 * Contributing: http://tinymce.moxiecode.com/contributing
 */

(function(tinymce) {
	var DOM = tinymce.DOM, Event = tinymce.dom.Event, is = tinymce.is, each = tinymce.each;

	/**
	 * This class is used to create UI color split button. A color split button will present show a small color picker
	 * when you press the open menu.
	 *
	 * @class tinymce.ui.ColorSplitButton
	 * @extends tinymce.ui.SplitButton
	 */
	tinymce.create('tinymce.ui.ColorSplitButton:tinymce.ui.SplitButton', {
		/**
		 * Constructs a new color split button control instance.
		 *
		 * @constructor
		 * @method ColorSplitButton
		 * @param {String} id Control id for the color split button.
		 * @param {Object} s Optional name/value settings object.
		 * @param {Editor} ed The editor instance this button is for.
		 */
		ColorSplitButton : function(id, s, ed) {
			var t = this;

			t.parent(id, s, ed);

			/**
			 * Settings object.
			 *
			 * @property settings
			 * @type Object
			 */
			t.settings = s = tinymce.extend({
				colors : '000000,993300,333300,003300,003366,000080,333399,333333,800000,FF6600,808000,008000,008080,0000FF,666699,808080,FF0000,FF9900,99CC00,339966,33CCCC,3366FF,800080,999999,FF00FF,FFCC00,FFFF00,00FF00,00FFFF,00CCFF,993366,C0C0C0,FF99CC,FFCC99,FFFF99,CCFFCC,CCFFFF,99CCFF,CC99FF,FFFFFF',
				grid_width : 8,
				default_color : '#888888'
			}, t.settings);

			/**
			 * Fires when the menu is shown.
			 *
			 * @event onShowMenu
			 */
			t.onShowMenu = new tinymce.util.Dispatcher(t);

			/**
			 * Fires when the menu is hidden.
			 *
			 * @event onHideMenu
			 */
			t.onHideMenu = new tinymce.util.Dispatcher(t);

			/**
			 * Current color value.
			 *
			 * @property value
			 * @type String
			 */
			t.value = s.default_color;
		},

		/**
		 * Shows the color menu. The color menu is a layer places under the button
		 * and displays a table of colors for the user to pick from.
		 *
		 * @method showMenu
		 */
		showMenu : function() {
			var t = this, r, p, e, p2;

			if (t.isDisabled())
				return;

			if (!t.isMenuRendered) {
				t.renderMenu();
				t.isMenuRendered = true;
			}

			if (t.isMenuVisible)
				return t.hideMenu();

			e = DOM.get(t.id);
			DOM.show(t.id + '_menu');
			DOM.addClass(e, 'mceSplitButtonSelected');
			p2 = DOM.getPos(e);
			DOM.setStyles(t.id + '_menu', {
				left : p2.x,
				top : p2.y + e.clientHeight,
				zIndex : 200000
			});
			e = 0;

			Event.add(DOM.doc, 'mousedown', t.hideMenu, t);
			t.onShowMenu.dispatch(t);

			if (t._focused) {
				t._keyHandler = Event.add(t.id + '_menu', 'keydown', function(e) {
					if (e.keyCode == 27)
						t.hideMenu();
				});

				DOM.select('a', t.id + '_menu')[0].focus(); // Select first link
			}

			t.isMenuVisible = 1;
		},

		/**
		 * Hides the color menu. The optional event parameter is used to check where the event occured so it
		 * doesn't close them menu if it was a event inside the menu.
		 *
		 * @method hideMenu
		 * @param {Event} e Optional event object.
		 */
		hideMenu : function(e) {
			var t = this;

			if (t.isMenuVisible) {
				// Prevent double toogles by canceling the mouse click event to the button
				if (e && e.type == "mousedown" && DOM.getParent(e.target, function(e) {return e.id === t.id + '_open';}))
					return;

				if (!e || !DOM.getParent(e.target, '.mceSplitButtonMenu')) {
					DOM.removeClass(t.id, 'mceSplitButtonSelected');
					Event.remove(DOM.doc, 'mousedown', t.hideMenu, t);
					Event.remove(t.id + '_menu', 'keydown', t._keyHandler);
					DOM.hide(t.id + '_menu');
				}

				t.isMenuVisible = 0;
			}
		},

		/**
		 * Renders the menu to the DOM.
		 *
		 * @method renderMenu
		 */
		renderMenu : function() {
			var t = this, m, i = 0, s = t.settings, n, tb, tr, w, context;

			w = DOM.add(s.menu_container, 'div', {role: 'listbox', id : t.id + '_menu', 'class' : s['menu_class'] + ' ' + s['class'], style : 'position:absolute;left:0;top:-1000px;'});
			m = DOM.add(w, 'div', {'class' : s['class'] + ' mceSplitButtonMenu'});
			DOM.add(m, 'span', {'class' : 'mceMenuLine'});

			n = DOM.add(m, 'table', {role: 'presentation', 'class' : 'mceColorSplitMenu'});
			tb = DOM.add(n, 'tbody');

			// Generate color grid
			i = 0;
			each(is(s.colors, 'array') ? s.colors : s.colors.split(','), function(c) {
				c = c.replace(/^#/, '');

				if (!i--) {
					tr = DOM.add(tb, 'tr');
					i = s.grid_width - 1;
				}

				n = DOM.add(tr, 'td');
				n = DOM.add(n, 'a', {
					role : 'option',
					href : 'javascript:;',
					style : {
						backgroundColor : '#' + c
					},
					'title': t.editor.getLang('colors.' + c, c),
					'data-mce-color' : '#' + c
				});

				if (t.editor.forcedHighContrastMode) {
					n = DOM.add(n, 'canvas', { width: 16, height: 16, 'aria-hidden': 'true' });
					if (n.getContext && (context = n.getContext("2d"))) {
						context.fillStyle = '#' + c;
						context.fillRect(0, 0, 16, 16);
					} else {
						// No point leaving a canvas element around if it's not supported for drawing on anyway.
						DOM.remove(n);
					}
				}
			});

			if (s.more_colors_func) {
				n = DOM.add(tb, 'tr');
				n = DOM.add(n, 'td', {colspan : s.grid_width, 'class' : 'mceMoreColors'});
				n = DOM.add(n, 'a', {role: 'option', id : t.id + '_more', href : 'javascript:;', onclick : 'return false;', 'class' : 'mceMoreColors'}, s.more_colors_title);

				Event.add(n, 'click', function(e) {
					s.more_colors_func.call(s.more_colors_scope || this);
					return Event.cancel(e); // Cancel to fix onbeforeunload problem
				});
			}

			DOM.addClass(m, 'mceColorSplitMenu');
			
			new tinymce.ui.KeyboardNavigation({
				root: t.id + '_menu',
				items: DOM.select('a', t.id + '_menu'),
				onCancel: function() {
					t.hideMenu();
					t.focus();
				}
			});

			// Prevent IE from scrolling and hindering click to occur #4019
			Event.add(t.id + '_menu', 'mousedown', function(e) {return Event.cancel(e);});

			Event.add(t.id + '_menu', 'click', function(e) {
				var c;

				e = DOM.getParent(e.target, 'a', tb);

				if (e && e.nodeName.toLowerCase() == 'a' && (c = e.getAttribute('data-mce-color')))
					t.setColor(c);

				return Event.cancel(e); // Prevent IE auto save warning
			});

			return w;
		},

		/**
		 * Sets the current color for the control and hides the menu if it should be visible.
		 *
		 * @method setColor
		 * @param {String} c Color code value in hex for example: #FF00FF
		 */
		setColor : function(c) {
			this.displayColor(c);
			this.hideMenu();
			this.settings.onselect(c);
		},
		
		/**
		 * Change the currently selected color for the control.
		 *
		 * @method displayColor
		 * @param {String} c Color code value in hex for example: #FF00FF
		 */
		displayColor : function(c) {
			var t = this;

			DOM.setStyle(t.id + '_preview', 'backgroundColor', c);

			t.value = c;
		},

		/**
		 * Post render event. This will be executed after the control has been rendered and can be used to
		 * set states, add events to the control etc. It's recommended for subclasses of the control to call this method by using this.parent().
		 *
		 * @method postRender
		 */
		postRender : function() {
			var t = this, id = t.id;

			t.parent();
			DOM.add(id + '_action', 'div', {id : id + '_preview', 'class' : 'mceColorPreview'});
			DOM.setStyle(t.id + '_preview', 'backgroundColor', t.value);
		},

		/**
		 * Destroys the control. This means it will be removed from the DOM and any
		 * events tied to it will also be removed.
		 *
		 * @method destroy
		 */
		destroy : function() {
			this.parent();

			Event.clear(this.id + '_menu');
			Event.clear(this.id + '_more');
			DOM.remove(this.id + '_menu');
		}
	});
})(tinymce);