/*******************************************************************************
 * @license
 * Copyright (c) 2010, 2015 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials are made 
 * available under the terms of the Eclipse Public License v1.0 
 * (http://www.eclipse.org/legal/epl-v10.html), and the Eclipse Distribution 
 * License v1.0 (http://www.eclipse.org/org/documents/edl-v10.html). 
 * 
 * Contributors: 
 *		Felipe Heidrich (IBM Corporation) - initial API and implementation
 *		Silenio Quarti (IBM Corporation) - initial API and implementation
 *		Mihai Sucan (Mozilla Foundation) - fix for Bug#334583 Bug#348471 Bug#349485 Bug#350595 Bug#360726 Bug#361180 Bug#362835 Bug#362428 Bug#362286 Bug#354270 Bug#361474 Bug#363945 Bug#366312 Bug#370584
 ******************************************************************************/

/* keywords */
	class, const, 
	debugger, delete, 
	enum, export, extends,
	function,
	implements, import, in, instanceof, interface,
	let,
	new,
	package, private, protected, public,
	static, super,
	typeof,
	var, void,
	with

/* controlKeywords */
	break,
	case, catch, continue,
	default, do,
	else,
	finally, for,
	if,
	return,
	switch,
	throw, try,
	while,
	yield

/* constants */
	false, null, true, undefined
	
var multilineString1 = "line 1\
line2\
'line3'\
\
line5";

var multilineString2 = 'line 1\
line2\
"line3"\
\
line5';

var hexNumber = 0xFFFF;
var decimalNumber = -12e34.56e78;
var regexp = /as(d)*f/g;

/*eslint-env browser, amd*/
define("orion/editor/textView", [  //$NON-NLS-0$
, function(messages, mTextModel, mKeyModes, mEventTarget, mTextTheme, textUtil, util, mMetrics) {

	/** @private */
	function getWindow(document) {
		return document.defaultView || document.parentWindow;
	}
	function newArray(length) {
		return new Array(length);
	}
	var addHandler = textUtil.addEventListener;
	var removeHandler = textUtil.removeEventListener;
	/** @private */
	function applyStyle(style, node, reset) {
		if (reset) {
			node.className = "";
			var attrs = node.attributes;
			for (var i= attrs.length; i-->0;) {
				if (!util.isIE || util.isIE >= 9 || (util.isIE < 9 && attrs[i].specified)) {
					node.removeAttribute(attrs[i].name); 
				}
			}
		}
		if (!style) {
			return;
		}
		if (style.styleClass) {
			node.className = style.styleClass;
		}
		var properties = style.style;
		if (properties) {
			for (var s in properties) {
				if (properties.hasOwnProperty(s)) {
					node.style[s] = properties[s];
				}
			}
		}
		var attributes = style.attributes;
		if (attributes) {
			for (var a in attributes) {
				if (attributes.hasOwnProperty(a)) {
					node.setAttribute(a, attributes[a]);
				}
			}
		}
	}
	/** @private */
	function compare(s1, s2) {
		if (s1 === s2) { return true; }
		if (s1 && !s2 || !s1 && s2) { return false; }
		if ((s1 && s1.constructor === String) || (s2 && s2.constructor === String)) { return false; }
		if (s1 instanceof Array || s2 instanceof Array) {
			if (!(s1 instanceof Array && s2 instanceof Array)) { return false; }
			if (s1.length !== s2.length) { return false; }
			for (var i = 0; i < s1.length; i++) {
				if (!compare(s1[i], s2[i])) {
					return false;
				}
			}
			return true;
		}
		if (!(s1 instanceof Object) || !(s2 instanceof Object)) { return false; }
		var p;
		for (p in s1) {
			if (s1.hasOwnProperty(p)) {
				if (!s2.hasOwnProperty(p)) { return false; }
				if (!compare(s1[p], s2[p])) {return false; }
			}
		}
		for (p in s2) {
			if (!s1.hasOwnProperty(p)) { return false; }
		}
		return true;
	}
	/** @private */
	function getBorder(node) {
		var left,top,right,bottom;
		var window = getWindow(node.ownerDocument);
		if (window.getComputedStyle) {
			var style = window.getComputedStyle(node, null);
			left = style.getPropertyValue("border-left-width"); //$NON-NLS-0$
			top = style.getPropertyValue("border-top-width"); //$NON-NLS-0$
			right = style.getPropertyValue("border-right-width"); //$NON-NLS-0$
			bottom = style.getPropertyValue("border-bottom-width"); //$NON-NLS-0$
		} else if (node.currentStyle) {
			left = node.currentStyle.borderLeftWidth;
			top = node.currentStyle.borderTopWidth;
			right = node.currentStyle.borderRightWidth;
			bottom = node.currentStyle.borderBottomWidth;
		}
		return {
			left: parseInt(left, 10) || 0,
			top: parseInt(top, 10) || 0,
			right: parseInt(right, 10) || 0,
			bottom: parseInt(bottom, 10) || 0
		};
	}
	/** @private */
	function getPadding(node) {
		var left,top,right,bottom;
		var window = getWindow(node.ownerDocument);
		if (window.getComputedStyle) {
			var style = window.getComputedStyle(node, null);
			left = style.getPropertyValue("padding-left"); //$NON-NLS-0$
			top = style.getPropertyValue("padding-top"); //$NON-NLS-0$
			right = style.getPropertyValue("padding-right"); //$NON-NLS-0$
			bottom = style.getPropertyValue("padding-bottom"); //$NON-NLS-0$
		} else if (node.currentStyle) {
			left = node.currentStyle.paddingLeft;
			top = node.currentStyle.paddingTop;
			right = node.currentStyle.paddingRight;
			bottom = node.currentStyle.paddingBottom;
		}
		return {
			left: parseInt(left, 10) || 0, 
			top: parseInt(top, 10) || 0,
			right: parseInt(right, 10) || 0,
			bottom: parseInt(bottom, 10) || 0
		};
	}
	/** @private */
	function getLineTrim(line) {
		var trim = line._trim;
		if (!trim) {
			trim = getPadding(line);
			var border = getBorder(line);
			trim.left += border.left;
			trim.top += border.top;
			trim.right += border.right;
			trim.bottom += border.bottom;
			line._trim = trim;
		}
		return trim;
	}
	/** @private */
	function DOMReady(document, parent, className, callback) {
		className = "_" + className + "DOMReady"; //$NON-NLS-1$ //$NON-NLS-0$
		parent.className = parent.className ? parent.className + " " + className : className; //$NON-NLS-0$
		parent.__DOMReady = callback;
		var id = className + "Style"; //$NON-NLS-0$
		if (document.getElementById(id)) { return; }
		var animationName = className + "Animation"; //$NON-NLS-0$
		function insertListener(event) {
			if (event.animationName === animationName) {
				var target = event.target;
				if (typeof target.__DOMReady === "function") { //$NON-NLS-0$
					getWindow(document).setTimeout(function() {
						target.__DOMReady();
					}, 0);
				}
			}
		}
		/** @private */
		_getLineBoundingClientRect: function (child, noTrim) {
			var rect = new TextRect(child.getBoundingClientRect());
			if (this.view._wrapMode) {
			} else {
				rect.right = rect.left;
				var lastChild = child.lastChild;
				//Remove any artificial trailing whitespace in the line
				while (lastChild && lastChild.ignoreChars === lastChild.firstChild.length) {
					lastChild = lastChild.previousSibling;
				}
				if (lastChild) {
					var lastRect = lastChild.getBoundingClientRect();
					rect.right = lastRect.right + getLineTrim(child).right;
				}
			}
			if (noTrim) {
				var padding = getLineTrim(child);
				rect.left = rect.left + padding.left;
				rect.right = rect.right - padding.right;
			}
			return rect;
		},
		/**
		* Returns if the view is destroyed.
		* @returns {Boolean} <code>true</code> if the view is destroyed.
		*/
		isDestroyed: function () {
			return !this._clientDiv;
		},
		/** 
		 * @class This is the event sent when the user right clicks or otherwise invokes the context menu of the view. 
		 * <p> 
		 * <b>See:</b><br/> 
		 * {@link orion.editor.TextView}<br/> 
		 * {@link orion.editor.TextView#event:onContextMenu} 
		 * </p> 
		 * 
		 * @name orion.editor.ContextMenuEvent 
		 * 
		 * @property {Number} x The pointer location on the x axis, relative to the document the user is editing. 
		 * @property {Number} y The pointer location on the y axis, relative to the document the user is editing. 
		 * @property {Number} screenX The pointer location on the x axis, relative to the screen. This is copied from the DOM contextmenu event.screenX property. 
		 * @property {Number} screenY The pointer location on the y axis, relative to the screen. This is copied from the DOM contextmenu event.screenY property. 
		 * @property {Boolean} defaultPrevented Determines whether the user agent context menu should be shown. It is shown by default.
		 * @property {Function} preventDefault If called prevents the user agent context menu from showing.
		 */ 
		/** 
		 * This event is sent when the user invokes the view context menu. 
		 * 
		 * @event 
		 * @param {orion.editor.ContextMenuEvent} contextMenuEvent the event 
		 */ 
		onContextMenu: function(contextMenuEvent) {
			return this.dispatchEvent(contextMenuEvent); 
		}, 
		_isClientDiv: function(e) {
			var topNode = this._overlayDiv || this._clientDiv;
			var temp = e.target ? e.target : e.srcElement;
			while (temp) {
				if (topNode === temp) {
					return true;
				}
				temp = temp.parentNode;
			}
			return false;
		},
		_doBackspace: function (args) {
			var self = this;
			var selections = this._getSelections();
			selections.forEach(function(selection) {
				if (selection.isEmpty()) {
					if (!args.count) {
						args.count = 1;
					}
					args.count *= -1;
					args.expandTab = self._expandTab;
					self._doMove(args, selection);
				}
			});
			this._modifyContent({text: "", selection: selections}, true);
			return true;
		},
		_getTextFromElement: function(element) {
			var document = element.ownerDocument;
			var window = document.defaultView;
			if (!window.getSelection) {
				return element.innerText || element.textContent;
			}

			var newRange = document.createRange();
			newRange.selectNode(element);

			var selection = window.getSelection();
			var oldRanges = [], i;
			for (i = 0; i < selection.rangeCount; i++) {
				oldRanges.push(selection.getRangeAt(i));
			}

			this._ignoreSelect = true;
			selection.removeAllRanges();
			selection.addRange(newRange);

			var text = selection.toString();

			selection.removeAllRanges();
			for (i = 0; i < oldRanges.length; i++) {
				selection.addRange(oldRanges[i]);
			}

			this._ignoreSelect = false;
			return text;
		},
		_startIME: function () {
			if (this._imeOffset !== -1) { return; }
			var selections = this._getSelections();
			this._modifyContent({text: "", selection: selections}, true);
			this._imeOffset = selections[0].start;
		},
		_updateOverflow: function() {
			var viewDiv = this._viewDiv;
			if (this._noScroll) {
				viewDiv.style.overflow = "hidden"; //$NON-NLS-0$
			} else if (this._wrapMode) {
				viewDiv.style.overflowX = "hidden"; //$NON-NLS-0$
				viewDiv.style.overflowY = "scroll"; //$NON-NLS-0$
			} else {
				viewDiv.style.overflow = "hidden"; //$NON-NLS-0$
			}
		},
		_updateStyleSheet: function() {
			var styleText = "";
			if (util.isWebkit && this._metrics.scrollWidth > 0) {
				styleText += "\n.textview ::-webkit-scrollbar-corner {background: #eeeeee;}"; //$NON-NLS-0$
			}
			if (styleText) {
				var document = this._clientDiv.ownerDocument;
				var node = document.getElementById("_textviewStyle"); //$NON-NLS-0$
				if (!node) {
					node = util.createElement(document, "style"); //$NON-NLS-0$
					node.id = "_textviewStyle"; //$NON-NLS-0$
					var head = document.getElementsByTagName("head")[0] || document.documentElement; //$NON-NLS-0$
					node.appendChild(document.createTextNode(styleText));
					head.insertBefore(node, head.firstChild);
				} else {
					node.removeChild(node.firstChild);
					node.appendChild(document.createTextNode(styleText));
				}
			}
		},
		_updateStyle: function (init) {
			if (!init && util.isIE) {
				this._rootDiv.style.lineHeight = "normal"; //$NON-NLS-0$
			}
			var metrics = this._metrics = this._calculateMetrics();
			if (this._variableLineHeight) {
				this._variableLineHeight = false;
				this._resetLineHeight();
			}
			if (util.isIE) {
				this._rootDiv.style.lineHeight = (metrics.lineHeight - (metrics.lineTrim.top + metrics.lineTrim.bottom)) + "px"; //$NON-NLS-0$
			} else {
				this._rootDiv.style.lineHeight = "normal"; //$NON-NLS-0$
			}
			this._updateStyleSheet();
			if (util.isMac && util.isWebkit) {
				var viewDiv = this._viewDiv;
				if (!metrics.invalid && metrics.scrollWidth === 0) {
					viewDiv.style.pointerEvents = "none"; //$NON-NLS-0$
					viewDiv.style.zIndex = "2"; //$NON-NLS-0$
				} else {
					viewDiv.style.pointerEvents = ""; //$NON-NLS-0$
					viewDiv.style.zIndex = ""; //$NON-NLS-0$
				}
			}
			if (!init) {
				this.redraw();
				this._resetLineWidth();
			}
		}
	};//end prototype
	mEventTarget.EventTarget.addMixin(TextView.prototype);
	
	return {TextView: TextView};
});
