text: /**
   * Clipboard.js
   *
   * Copyright, Moxiecode Systems AB
   * Released under LGPL License.
   *
   * License: http://www.tinymce.com/license
   * Contributing: http://www.tinymce.com/contributing
   */
  
  /**
   * This class contains logic for getting HTML contents out of the clipboard.
   *
   * We need to make a lot of ugly hacks to get the contents out of the clipboard since
   * the W3C Clipboard API is broken in all browsers that have it: Gecko/WebKit/Blink.
   * We might rewrite this the way those API:s stabilize. Browsers doesn't handle pasting
   * from applications like Word the same way as it does when pasting into a contentEditable area
   * so we need to do lots of extra work to try to get to this clipboard data.
   *
   * Current implementation steps:
   *  1. On keydown with paste keys Ctrl+V or Shift+Insert create
   *     a paste bin element and move focus to that element.
   *  2. Wait for the browser to fire a "paste" event and get the contents out of the paste bin.
   *  3. Check if the paste was successful if true, process the HTML.
   *  (4). If the paste was unsuccessful use IE execCommand, Clipboard API, document.dataTransfer old WebKit API etc.
   *
   * @class tinymce.pasteplugin.Clipboard
   * @private
   */
  define("tinymce/pasteplugin/Clipboard", [
  	"tinymce/Env",
  	"tinymce/dom/RangeUtils",
  	"tinymce/util/VK",
  	"tinymce/pasteplugin/Utils"
  ], function(Env, RangeUtils, VK, Utils) {
  	return function(editor) {
  		var self = this, pasteBinElm, lastRng, keyboardPasteTimeStamp = 0, draggingInternally = false;
  		var pasteBinDefaultContent = '%MCEPASTEBIN%', keyboardPastePlainTextState;
  		var mceInternalUrlPrefix = 'data:text/mce-internal,';
  
  		/**
  		 * Pastes the specified HTML. This means that the HTML is filtered and then
  		 * inserted at the current selection in the editor. It will also fire paste events
  		 * for custom user filtering.
  		 *
  		 * @param {String} html HTML code to paste into the current selection.
  		 */
  		function pasteHtml(html) {
  			var args, dom = editor.dom;
  
  			args = editor.fire('BeforePastePreProcess', {content: html}); // Internal event used by Quirks
  			args = editor.fire('PastePreProcess', args);
  			html = args.content;
  
  			if (!args.isDefaultPrevented()) {
  				// User has bound PastePostProcess events then we need to pass it through a DOM node
  				// This is not ideal but we don't want to let the browser mess up the HTML for example
  				// some browsers add &nbsp; to P tags etc
  				if (editor.hasEventListeners('PastePostProcess') && !args.isDefaultPrevented()) {
  					// We need to attach the element to the DOM so Sizzle selectors work on the contents
  					var tempBody = dom.add(editor.getBody(), 'div', {style: 'display:none'}, html);
  					args = editor.fire('PastePostProcess', {node: tempBody});
  					dom.remove(tempBody);
  					html = args.node.innerHTML;
  				}
  
  				if (!args.isDefaultPrevented()) {
  					editor.insertContent(html, {merge: editor.settings.paste_merge_formats !== false});
  				}
  			}
  		}
  
  		/**
  		 * Pastes the specified text. This means that the plain text is processed
  		 * and converted into BR and P elements. It will fire paste events for custom filtering.
  		 *
  		 * @param {String} text Text to paste as the current selection location.
  		 */
  		function pasteText(text) {
  			text = editor.dom.encode(text).replace(/\r\n/g, '\n');
  
  			var startBlock = editor.dom.getParent(editor.selection.getStart(), editor.dom.isBlock);
  
  			// Create start block html for example <p attr="value">
  			var forcedRootBlockName = editor.settings.forced_root_block;
  			var forcedRootBlockStartHtml;
  			if (forcedRootBlockName) {
  				forcedRootBlockStartHtml = editor.dom.createHTML(forcedRootBlockName, editor.settings.forced_root_block_attrs);
  				forcedRootBlockStartHtml = forcedRootBlockStartHtml.substr(0, forcedRootBlockStartHtml.length - 3) + '>';
  			}
  
  			if ((startBlock && /^(PRE|DIV)$/.test(startBlock.nodeName)) || !forcedRootBlockName) {
  				text = Utils.filter(text, [
  					[/\n/g, "<br>"]
  				]);
  			} else {
  				text = Utils.filter(text, [
  					[/\n\n/g, "</p>" + forcedRootBlockStartHtml],
  					[/^(.*<\/p>)(<p>)$/, forcedRootBlockStartHtml + '$1'],
  					[/\n/g, "<br />"]
  				]);
  
  				if (text.indexOf('<p>') != -1) {
  					text = forcedRootBlockStartHtml + text;
  				}
  			}
  
  			pasteHtml(text);
  		}
  
  		/**
  		 * Creates a paste bin element as close as possible to the current caret location and places the focus inside that element
  		 * so that when the real paste event occurs the contents gets inserted into this element
  		 * instead of the current editor selection element.
  		 */
  		function createPasteBin() {
  			var dom = editor.dom, body = editor.getBody();
  			var viewport = editor.dom.getViewPort(editor.getWin()), scrollTop = viewport.y, top = 20;
  			var scrollContainer;
  
  			lastRng = editor.selection.getRng();
  
  			if (editor.inline) {
  				scrollContainer = editor.selection.getScrollContainer();
  
  				// Can't always rely on scrollTop returning a useful value.
  				// It returns 0 if the browser doesn't support scrollTop for the element or is non-scrollable
  				if (scrollContainer && scrollContainer.scrollTop > 0) {
  					scrollTop = scrollContainer.scrollTop;
  				}
  			}
  
  			/**
  			 * Returns the rect of the current caret if the caret is in an empty block before a
  			 * BR we insert a temporary invisible character that we get the rect this way we always get a proper rect.
  			 *
  			 * TODO: This might be useful in core.
  			 */
  			function getCaretRect(rng) {
  				var rects, textNode, node, container = rng.startContainer;
  
  				rects = rng.getClientRects();
  				if (rects.length) {
  					return rects[0];
  				}
  
  				if (!rng.collapsed || container.nodeType != 1) {
  					return;
  				}
  
  				node = container.childNodes[lastRng.startOffset];
  
  				// Skip empty whitespace nodes
  				while (node && node.nodeType == 3 && !node.data.length) {
  					node = node.nextSibling;
  				}
  
  				if (!node) {
  					return;
  				}
  
  				// Check if the location is |<br>
  				// TODO: Might need to expand this to say |<table>
  				if (node.tagName == 'BR') {
  					textNode = dom.doc.createTextNode('\uFEFF');
  					node.parentNode.insertBefore(textNode, node);
  
  					rng = dom.createRng();
  					rng.setStartBefore(textNode);
  					rng.setEndAfter(textNode);
  
  					rects = rng.getClientRects();
  					dom.remove(textNode);
  				}
  
  				if (rects.length) {
  					return rects[0];
  				}
  			}
  
  			// Calculate top cordinate this is needed to avoid scrolling to top of document
  			// We want the paste bin to be as close to the caret as possible to avoid scrolling
  			if (lastRng.getClientRects) {
  				var rect = getCaretRect(lastRng);
  
  				if (rect) {
  					// Client rects gets us closes to the actual
  					// caret location in for example a wrapped paragraph block
  					top = scrollTop + (rect.top - dom.getPos(body).y);
  				} else {
  					top = scrollTop;
  
  					// Check if we can find a closer location by checking the range element
  					var container = lastRng.startContainer;
  					if (container) {
  						if (container.nodeType == 3 && container.parentNode != body) {
  							container = container.parentNode;
  						}
  
  						if (container.nodeType == 1) {
  							top = dom.getPos(container, scrollContainer || body).y;
  						}
  					}
  				}
  			}
  
  			// Create a pastebin
  			pasteBinElm = dom.add(editor.getBody(), 'div', {
  				id: "mcepastebin",
  				contentEditable: true,
  				"data-mce-bogus": "all",
  				style: 'position: absolute; top: ' + top + 'px;' +
  					'width: 10px; height: 10px; overflow: hidden; opacity: 0'
  			}, pasteBinDefaultContent);
  
  			// Move paste bin out of sight since the controlSelection rect gets displayed otherwise on IE and Gecko
  			if (Env.ie || Env.gecko) {
  				dom.setStyle(pasteBinElm, 'left', dom.getStyle(body, 'direction', true) == 'rtl' ? 0xFFFF : -0xFFFF);
  			}
  
  			// Prevent focus events from bubbeling fixed FocusManager issues
  			dom.bind(pasteBinElm, 'beforedeactivate focusin focusout', function(e) {
  				e.stopPropagation();
  			});
  
  			pasteBinElm.focus();
  			editor.selection.select(pasteBinElm, true);
  		}
  
  		/**
  		 * Removes the paste bin if it exists.
  		 */
  		function removePasteBin() {
  			if (pasteBinElm) {
  				var pasteBinClone;
  
  				// WebKit/Blink might clone the div so
  				// lets make sure we remove all clones
  				// TODO: Man o man is this ugly. WebKit is the new IE! Remove this if they ever fix it!
  				while ((pasteBinClone = editor.dom.get('mcepastebin'))) {
  					editor.dom.remove(pasteBinClone);
  					editor.dom.unbind(pasteBinClone);
  				}
  
  				if (lastRng) {
  					editor.selection.setRng(lastRng);
  				}
  			}
  
  			pasteBinElm = lastRng = null;
  		}
  
  		/**
  		 * Returns the contents of the paste bin as a HTML string.
  		 *
  		 * @return {String} Get the contents of the paste bin.
  		 */
  		function getPasteBinHtml() {
  			var html = '', pasteBinClones, i, clone, cloneHtml;
  
  			// Since WebKit/Chrome might clone the paste bin when pasting
  			// for example: <img style="float: right"> we need to check if any of them contains some useful html.
  			// TODO: Man o man is this ugly. WebKit is the new IE! Remove this if they ever fix it!
  			pasteBinClones = editor.dom.select('div[id=mcepastebin]');
  			for (i = 0; i < pasteBinClones.length; i++) {
  				clone = pasteBinClones[i];
  
  				// Pasting plain text produces pastebins in pastebinds makes sence right!?
  				if (clone.firstChild && clone.firstChild.id == 'mcepastebin') {
  					clone = clone.firstChild;
  				}
  
  				cloneHtml = clone.innerHTML;
  				if (html != pasteBinDefaultContent) {
  					html += cloneHtml;
  				}
  			}
  
  			return html;
  		}
  
  		/**
  		 * Gets various content types out of a datatransfer object.
  		 *
  		 * @param {DataTransfer} dataTransfer Event fired on paste.
  		 * @return {Object} Object with mime types and data for those mime types.
  		 */
  		function getDataTransferItems(dataTransfer) {
  			var data = {};
  
  			if (dataTransfer) {
  				// Use old WebKit/IE API
  				if (dataTransfer.getData) {
  					var legacyText = dataTransfer.getData('Text');
  					if (legacyText && legacyText.length > 0) {
  						if (legacyText.indexOf(mceInternalUrlPrefix) == -1) {
  							data['text/plain'] = legacyText;
  						}
  					}
  				}
  
  				if (dataTransfer.types) {
  					for (var i = 0; i < dataTransfer.types.length; i++) {
  						var contentType = dataTransfer.types[i];
  						data[contentType] = dataTransfer.getData(contentType);
  					}
  				}
  			}
  
  			return data;
  		}
  
  		/**
  		 * Gets various content types out of the Clipboard API. It will also get the
  		 * plain text using older IE and WebKit API:s.
  		 *
  		 * @param {ClipboardEvent} clipboardEvent Event fired on paste.
  		 * @return {Object} Object with mime types and data for those mime types.
  		 */
  		function getClipboardContent(clipboardEvent) {
  			return getDataTransferItems(clipboardEvent.clipboardData || editor.getDoc().dataTransfer);
  		}
  
  		/**
  		 * Checks if the clipboard contains image data if it does it will take that data
  		 * and convert it into a data url image and paste that image at the caret location.
  		 *
  		 * @param  {ClipboardEvent} e Paste/drop event object.
  		 * @param  {DOMRange} rng Optional rng object to move selection to.
  		 * @return {Boolean} true/false if the image data was found or not.
  		 */
  		function pasteImageData(e, rng) {
  			var dataTransfer = e.clipboardData || e.dataTransfer;
  
  			function processItems(items) {
  				var i, item, reader, hadImage = false;
  
  				function pasteImage(reader) {
  					if (rng) {
  						editor.selection.setRng(rng);
  						rng = null;
  					}
  
  					pasteHtml('<img src="' + reader.result + '">');
  				}
  
  				if (items) {
  					for (i = 0; i < items.length; i++) {
  						item = items[i];
  
  						if (/^image\/(jpeg|png|gif|bmp)$/.test(item.type)) {
  							reader = new FileReader();
  							reader.onload = pasteImage.bind(null, reader);
  							reader.readAsDataURL(item.getAsFile ? item.getAsFile() : item);
  
  							e.preventDefault();
  							hadImage = true;
  						}
  					}
  				}
  
  				return hadImage;
  			}
  
  			if (editor.settings.paste_data_images && dataTransfer) {
  				return processItems(dataTransfer.items) || processItems(dataTransfer.files);
  			}
  		}
  
  		/**
  		 * Chrome on Android doesn't support proper clipboard access so we have no choice but to allow the browser default behavior.
  		 *
  		 * @param {Event} e Paste event object to check if it contains any data.
  		 * @return {Boolean} true/false if the clipboard is empty or not.
  		 */
  		function isBrokenAndroidClipboardEvent(e) {
  			var clipboardData = e.clipboardData;
  
  			return navigator.userAgent.indexOf('Android') != -1 && clipboardData && clipboardData.items && clipboardData.items.length === 0;
  		}
  
  		function getCaretRangeFromEvent(e) {
  			return RangeUtils.getCaretRangeFromPoint(e.clientX, e.clientY, editor.getDoc());
  		}
  
  		function hasContentType(clipboardContent, mimeType) {
  			return mimeType in clipboardContent && clipboardContent[mimeType].length > 0;
  		}
  
  		function isKeyboardPasteEvent(e) {
  			return (VK.metaKeyPressed(e) && e.keyCode == 86) || (e.shiftKey && e.keyCode == 45);
  		}
  
  		function registerEventHandlers() {
  			editor.on('keydown', function(e) {
  				function removePasteBinOnKeyUp(e) {
  					// Ctrl+V or Shift+Insert
  					if (isKeyboardPasteEvent(e) && !e.isDefaultPrevented()) {
  						removePasteBin();
  					}
  				}
  
  				// Ctrl+V or Shift+Insert
  				if (isKeyboardPasteEvent(e) && !e.isDefaultPrevented()) {
  					keyboardPastePlainTextState = e.shiftKey && e.keyCode == 86;
  
  					// Edge case on Safari on Mac where it doesn't handle Cmd+Shift+V correctly
  					// it fires the keydown but no paste or keyup so we are left with a paste bin
  					if (keyboardPastePlainTextState && Env.webkit && navigator.userAgent.indexOf('Version/') != -1) {
  						return;
  					}
  
  					// Prevent undoManager keydown handler from making an undo level with the pastebin in it
  					e.stopImmediatePropagation();
  
  					keyboardPasteTimeStamp = new Date().getTime();
  
  					// IE doesn't support Ctrl+Shift+V and it doesn't even produce a paste event
  					// so lets fake a paste event and let IE use the execCommand/dataTransfer methods
  					if (Env.ie && keyboardPastePlainTextState) {
  						e.preventDefault();
  						editor.fire('paste', {ieFake: true});
  						return;
  					}
  
  					removePasteBin();
  					createPasteBin();
  
  					// Remove pastebin if we get a keyup and no paste event
  					// For example pasting a file in IE 11 will not produce a paste event
  					editor.once('keyup', removePasteBinOnKeyUp);
  					editor.once('paste', function() {
  						editor.off('keyup', removePasteBinOnKeyUp);
  					});
  				}
  			});
  
  			editor.on('paste', function(e) {
  				// Getting content from the Clipboard can take some time
  				var clipboardTimer = new Date().getTime();
  				var clipboardContent = getClipboardContent(e);
  				var clipboardDelay = new Date().getTime() - clipboardTimer;
  
  				var isKeyBoardPaste = (new Date().getTime() - keyboardPasteTimeStamp - clipboardDelay) < 1000;
  				var plainTextMode = self.pasteFormat == "text" || keyboardPastePlainTextState;
  
  				keyboardPastePlainTextState = false;
  
  				if (e.isDefaultPrevented() || isBrokenAndroidClipboardEvent(e)) {
  					removePasteBin();
  					return;
  				}
  
  				if (pasteImageData(e)) {
  					removePasteBin();
  					return;
  				}
  
  				// Not a keyboard paste prevent default paste and try to grab the clipboard contents using different APIs
  				if (!isKeyBoardPaste) {
  					e.preventDefault();
  				}
  
  				// Try IE only method if paste isn't a keyboard paste
  				if (Env.ie && (!isKeyBoardPaste || e.ieFake)) {
  					createPasteBin();
  
  					editor.dom.bind(pasteBinElm, 'paste', function(e) {
  						e.stopPropagation();
  					});
  
  					editor.getDoc().execCommand('Paste', false, null);
  					clipboardContent["text/html"] = getPasteBinHtml();
  				}
  
  				setTimeout(function() {
  					var content;
  
  					// Grab HTML from Clipboard API or paste bin as a fallback
  					if (hasContentType(clipboardContent, 'text/html')) {
  						content = clipboardContent['text/html'];
  					} else {
  						content = getPasteBinHtml();
  
  						// If paste bin is empty try using plain text mode
  						// since that is better than nothing right
  						if (content == pasteBinDefaultContent) {
  							plainTextMode = true;
  						}
  					}
  
  					content = Utils.trimHtml(content);
  
  					// WebKit has a nice bug where it clones the paste bin if you paste from for example notepad
  					// so we need to force plain text mode in this case
  					if (pasteBinElm && pasteBinElm.firstChild && pasteBinElm.firstChild.id === 'mcepastebin') {
  						plainTextMode = true;
  					}
  
  					removePasteBin();
  
  					// If we got nothing from clipboard API and pastebin then we could try the last resort: plain/text
  					if (!content.length) {
  						plainTextMode = true;
  					}
  
  					// Grab plain text from Clipboard API or convert existing HTML to plain text
  					if (plainTextMode) {
  						// Use plain text contents from Clipboard API unless the HTML contains paragraphs then
  						// we should convert the HTML to plain text since works better when pasting HTML/Word contents as plain text
  						if (hasContentType(clipboardContent, 'text/plain') && content.indexOf('</p>') == -1) {
  							content = clipboardContent['text/plain'];
  						} else {
  							content = Utils.innerText(content);
  						}
  					}
  
  					// If the content is the paste bin default HTML then it was
  					// impossible to get the cliboard data out.
  					if (content == pasteBinDefaultContent) {
  						if (!isKeyBoardPaste) {
  							editor.windowManager.alert('Please use Ctrl+V/Cmd+V keyboard shortcuts to paste contents.');
  						}
  
  						return;
  					}
  
  					if (plainTextMode) {
  						pasteText(content);
  					} else {
  						pasteHtml(content);
  					}
  				}, 0);
  			});
  
  			editor.on('dragstart dragend', function(e) {
  				draggingInternally = e.type == 'dragstart';
  			});
  
  			editor.on('drop', function(e) {
  				var rng = getCaretRangeFromEvent(e);
  
  				if (e.isDefaultPrevented() || draggingInternally) {
  					return;
  				}
  
  				if (pasteImageData(e, rng)) {
  					return;
  				}
  
  				if (rng && editor.settings.paste_filter_drop !== false) {
  					var dropContent = getDataTransferItems(e.dataTransfer);
  					var content = dropContent['mce-internal'] || dropContent['text/html'] || dropContent['text/plain'];
  
  					if (content) {
  						e.preventDefault();
  
  						editor.undoManager.transact(function() {
  							if (dropContent['mce-internal']) {
  								editor.execCommand('Delete');
  							}
  
  							editor.selection.setRng(rng);
  
  							content = Utils.trimHtml(content);
  
  							if (!dropContent['text/html']) {
  								pasteText(content);
  							} else {
  								pasteHtml(content);
  							}
  						});
  					}
  				}
  			});
  
  			editor.on('dragover dragend', function(e) {
  				if (editor.settings.paste_data_images) {
  					e.preventDefault();
  				}
  			});
  		}
  
  		self.pasteHtml = pasteHtml;
  		self.pasteText = pasteText;
  
  		editor.on('preInit', function() {
  			registerEventHandlers();
  
  			// Remove all data images from paste for example from Gecko
  			// except internal images like video elements
  			editor.parser.addNodeFilter('img', function(nodes) {
  				if (!editor.settings.paste_data_images) {
  					var i = nodes.length;
  
  					while (i--) {
  						var src = nodes[i].attributes.map.src;
  
  						// Some browsers automatically produce data uris on paste
  						// Safari on Mac produces webkit-fake-url see: https://bugs.webkit.org/show_bug.cgi?id=49141
  						if (src && /^(data:image|webkit\-fake\-url)/.test(src)) {
  							if (!nodes[i].attr('data-mce-object') && src !== Env.transparentSrc) {
  								nodes[i].remove();
  							}
  						}
  					}
  				}
  			});
  		});
  	};
  });
  