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## TinyMCE_ForceParagraphs.class.js

#### Summary

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    /**
     * $RCSfile: overview-summary-TinyMCE_ForceParagraphs.class.js.html,v $
     * $Revision: 1.42 $
     * $Date: 2006/04/14 20:00:30 $
     *
     * @author Moxiecode
     * @copyright Copyright © 2004-2006, Moxiecode Systems AB, All rights reserved.
     */

    /**
     * Forces P tags on return/enter in Gecko browsers.
     */
    var TinyMCE_ForceParagraphs = {
    	/**
    	 * Inserts a paragraph at the current cursor location.
    	 *
    	 * @param {TinyMCE_Control} inst TinyMCE editor control instance.
    	 * @param {DOMEvent} e DOM event object.
    	 * @return true on success or false if it fails.
    	 * @type boolean
    	 * @private
    	 */
    	_insertPara : function(inst, e) {
    		function isEmpty(para) {
    			function isEmptyHTML(html) {
    				return html.replace(new RegExp('[ \t\r\n]+', 'g'), '').toLowerCase() == "";
    			}

    			// Check for images
    			if (para.getElementsByTagName("img").length > 0)
    				return false;

    			// Check for tables
    			if (para.getElementsByTagName("table").length > 0)
    				return false;

    			// Check for HRs
    			if (para.getElementsByTagName("hr").length > 0)
    				return false;

    			// Check all textnodes
    			var nodes = tinyMCE.getNodeTree(para, new Array(), 3);
    			for (var i=0; i<nodes.length; i++) {
    				if (!isEmptyHTML(nodes[i].nodeValue))
    					return false;
    			}

    			// No images, no tables, no hrs, no text content then it's empty
    			return true;
    		}

    		var doc = inst.getDoc();
    		var sel = inst.getSel();
    		var win = inst.contentWindow;
    		var rng = sel.getRangeAt(0);
    		var body = doc.body;
    		var rootElm = doc.documentElement;
    		var blockName = "P";

    	//	tinyMCE.debug(body.innerHTML);

    	//	debug(e.target, sel.anchorNode.nodeName, sel.focusNode.nodeName, rng.startContainer, rng.endContainer, rng.commonAncestorContainer, sel.anchorOffset, sel.focusOffset, rng.toString());

    		// Setup before range
    		var rngBefore = doc.createRange();
    		rngBefore.setStart(sel.anchorNode, sel.anchorOffset);
    		rngBefore.collapse(true);

    		// Setup after range
    		var rngAfter = doc.createRange();
    		rngAfter.setStart(sel.focusNode, sel.focusOffset);
    		rngAfter.collapse(true);

    		// Setup start/end points
    		var direct = rngBefore.compareBoundaryPoints(rngBefore.START_TO_END, rngAfter) < 0;
    		var startNode = direct ? sel.anchorNode : sel.focusNode;
    		var startOffset = direct ? sel.anchorOffset : sel.focusOffset;
    		var endNode = direct ? sel.focusNode : sel.anchorNode;
    		var endOffset = direct ? sel.focusOffset : sel.anchorOffset;

    		startNode = startNode.nodeName == "BODY" ? startNode.firstChild : startNode;
    		endNode = endNode.nodeName == "BODY" ? endNode.firstChild : endNode;

    		// tinyMCE.debug(startNode, endNode);

    		// Get block elements
    		var startBlock = tinyMCE.getParentBlockElement(startNode);
    		var endBlock = tinyMCE.getParentBlockElement(endNode);

    		// If absolute force paragraph generation within
    		if (startBlock && new RegExp('absolute|relative|static', 'gi').test(startBlock.style.position))
    			startBlock = null;

    		if (endBlock && new RegExp('absolute|relative|static', 'gi').test(endBlock.style.position))
    			endBlock = null;

    		// Use current block name
    		if (startBlock != null) {
    			blockName = startBlock.nodeName;

    			// Use P instead
    			if (blockName == "TD" || blockName == "TABLE" || (blockName == "DIV" && new RegExp('left|right', 'gi').test(startBlock.style.cssFloat)))
    				blockName = "P";
    		}

    		// Within a list use normal behaviour
    		if (tinyMCE.getParentElement(startBlock, "OL,UL") != null)
    			return false;

    		// Within a table create new paragraphs
    		if ((startBlock != null && startBlock.nodeName == "TABLE") || (endBlock != null && endBlock.nodeName == "TABLE"))
    			startBlock = endBlock = null;

    		// Setup new paragraphs
    		var paraBefore = (startBlock != null && startBlock.nodeName == blockName) ? startBlock.cloneNode(false) : doc.createElement(blockName);
    		var paraAfter = (endBlock != null && endBlock.nodeName == blockName) ? endBlock.cloneNode(false) : doc.createElement(blockName);

    		// Is header, then force paragraph under
    		if (/^(H[1-6])$/.test(blockName))
    			paraAfter = doc.createElement("p");

    		// Setup chop nodes
    		var startChop = startNode;
    		var endChop = endNode;

    		// Get startChop node
    		node = startChop;
    		do {
    			if (node == body || node.nodeType == 9 || tinyMCE.isBlockElement(node))
    				break;

    			startChop = node;
    		} while ((node = node.previousSibling ? node.previousSibling : node.parentNode));

    		// Get endChop node
    		node = endChop;
    		do {
    			if (node == body || node.nodeType == 9 || tinyMCE.isBlockElement(node))
    				break;

    			endChop = node;
    		} while ((node = node.nextSibling ? node.nextSibling : node.parentNode));

    		// Fix when only a image is within the TD
    		if (startChop.nodeName == "TD")
    			startChop = startChop.firstChild;

    		if (endChop.nodeName == "TD")
    			endChop = endChop.lastChild;

    		// If not in a block element
    		if (startBlock == null) {
    			// Delete selection
    			rng.deleteContents();
    			sel.removeAllRanges();

    			if (startChop != rootElm && endChop != rootElm) {
    				// Insert paragraph before
    				rngBefore = rng.cloneRange();

    				if (startChop == body)
    					rngBefore.setStart(startChop, 0);
    				else
    					rngBefore.setStartBefore(startChop);

    				paraBefore.appendChild(rngBefore.cloneContents());

    				// Insert paragraph after
    				if (endChop.parentNode.nodeName == blockName)
    					endChop = endChop.parentNode;

    				// If not after image
    				//if (rng.startContainer.nodeName != "BODY" && rng.endContainer.nodeName != "BODY")
    					rng.setEndAfter(endChop);

    				if (endChop.nodeName != "#text" && endChop.nodeName != "BODY")
    					rngBefore.setEndAfter(endChop);

    				var contents = rng.cloneContents();
    				if (contents.firstChild && (contents.firstChild.nodeName == blockName || contents.firstChild.nodeName == "BODY"))
    					paraAfter.innerHTML = contents.firstChild.innerHTML;
    				else
    					paraAfter.appendChild(contents);

    				// Check if it's a empty paragraph
    				if (isEmpty(paraBefore))
    					paraBefore.innerHTML = "&nbsp;";

    				// Check if it's a empty paragraph
    				if (isEmpty(paraAfter))
    					paraAfter.innerHTML = "&nbsp;";

    				// Delete old contents
    				rng.deleteContents();
    				rngAfter.deleteContents();
    				rngBefore.deleteContents();

    				// Insert new paragraphs
    				paraAfter.normalize();
    				rngBefore.insertNode(paraAfter);
    				paraBefore.normalize();
    				rngBefore.insertNode(paraBefore);

    				// tinyMCE.debug("1: ", paraBefore.innerHTML, paraAfter.innerHTML);
    			} else {
    				body.innerHTML = "<" + blockName + ">&nbsp;</" + blockName + "><" + blockName + ">&nbsp;</" + blockName + ">";
    				paraAfter = body.childNodes[1];
    			}

    			inst.selection.selectNode(paraAfter, true, true);

    			return true;
    		}

    		// Place first part within new paragraph
    		if (startChop.nodeName == blockName)
    			rngBefore.setStart(startChop, 0);
    		else
    			rngBefore.setStartBefore(startChop);

    		rngBefore.setEnd(startNode, startOffset);
    		paraBefore.appendChild(rngBefore.cloneContents());

    		// Place secound part within new paragraph
    		rngAfter.setEndAfter(endChop);
    		rngAfter.setStart(endNode, endOffset);
    		var contents = rngAfter.cloneContents();

    		if (contents.firstChild && contents.firstChild.nodeName == blockName) {
    	/*		var nodes = contents.firstChild.childNodes;
    			for (var i=0; i<nodes.length; i++) {
    				//tinyMCE.debug(nodes[i].nodeName);
    				if (nodes[i].nodeName != "BODY")
    					paraAfter.appendChild(nodes[i]);
    			}
    	*/
    			paraAfter.innerHTML = contents.firstChild.innerHTML;
    		} else
    			paraAfter.appendChild(contents);

    		// Check if it's a empty paragraph
    		if (isEmpty(paraBefore))
    			paraBefore.innerHTML = "&nbsp;";

    		// Check if it's a empty paragraph
    		if (isEmpty(paraAfter))
    			paraAfter.innerHTML = "&nbsp;";

    		// Create a range around everything
    		var rng = doc.createRange();

    		if (!startChop.previousSibling && startChop.parentNode.nodeName.toUpperCase() == blockName) {
    			rng.setStartBefore(startChop.parentNode);
    		} else {
    			if (rngBefore.startContainer.nodeName.toUpperCase() == blockName && rngBefore.startOffset == 0)
    				rng.setStartBefore(rngBefore.startContainer);
    			else
    				rng.setStart(rngBefore.startContainer, rngBefore.startOffset);
    		}

    		if (!endChop.nextSibling && endChop.parentNode.nodeName.toUpperCase() == blockName)
    			rng.setEndAfter(endChop.parentNode);
    		else
    			rng.setEnd(rngAfter.endContainer, rngAfter.endOffset);

    		// Delete all contents and insert new paragraphs
    		rng.deleteContents();
    		rng.insertNode(paraAfter);
    		rng.insertNode(paraBefore);
    		//tinyMCE.debug("2", paraBefore.innerHTML, paraAfter.innerHTML);

    		// Normalize
    		paraAfter.normalize();
    		paraBefore.normalize();

    		inst.selection.selectNode(paraAfter, true, true);

    		return true;
    	},

    	/**
    	 * Handles the backspace action in Gecko. This will remove the weird BR element
    	 * that gets generated when a user hits backspace in the beginning of a paragraph.
    	 *
    	 * @param {TinyMCE_Control} inst TinyMCE editor control instance.
    	 * @return true/false if the event should be canceled or not.
    	 * @type
    	 */
    	_handleBackSpace : function(inst) {
    		var r = inst.getRng(), sn = r.startContainer, nv, s = false;

    		if (sn && sn.nextSibling && sn.nextSibling.nodeName == "BR") {
    			nv = sn.nodeValue;

    			// Handle if a backspace is pressed after a space character #bug 1466054
    			if (nv != null && nv.length >= r.startOffset && nv.charAt(r.startOffset - 1) == ' ')
    				s = true;

    			// Only remove BRs if we are at the end of line #bug 1464152
    			if (nv != null && r.startOffset == nv.length)
    				sn.nextSibling.parentNode.removeChild(sn.nextSibling);
    		}

    		return s;
    	}
    };

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Documentation generated by JSDoc on Fri Apr 14 21:59:23 2006