home *** CD-ROM | disk | FTP | other *** search
- // Modification to htmlArea to insert Paragraphs instead of
- // linebreaks, under Gecko engines, circa January 2004
- // By Adam Wright, for The University of Western Australia
- //
- // Distributed under the same terms as HTMLArea itself.
- // This notice MUST stay intact for use (see license.txt).
-
- function EnterParagraphs(editor, params) {
- this.editor = editor;
- // activate only if we're talking to Gecko
- if (HTMLArea.is_gecko)
- this.onKeyPress = this.__onKeyPress;
- };
-
- EnterParagraphs._pluginInfo = {
- name : "EnterParagraphs",
- version : "1.0",
- developer : "Adam Wright",
- developer_url : "http://blog.hipikat.org/",
- sponsor : "The University of Western Australia",
- sponsor_url : "http://www.uwa.edu.au/",
- license : "htmlArea"
- };
-
- // An array of elements who, in html4, by default, have an inline display and can have children
- // we use RegExp here since it should be a bit faster, also cleaner to check
- EnterParagraphs.prototype._html4_inlines_re = /^(a|abbr|acronym|b|bdo|big|cite|code|dfn|em|font|i|kbd|label|q|s|samp|select|small|span|strike|strong|sub|sup|textarea|tt|u|var)$/i;
-
- // Finds the first parent element of a given node whose display is probably not inline
- EnterParagraphs.prototype.parentBlock = function(node) {
- while (node.parentNode && (node.nodeType != 1 || this._html4_inlines_re.test(node.tagName)))
- node = node.parentNode;
- return node;
- };
-
- // Internal function for recursively itterating over a all nodes in a fragment
- // If a callback function returns a non-null value, that is returned and the crawl is therefore broken
- EnterParagraphs.prototype.walkNodeChildren = function(me, callback) {
- if (me.firstChild) {
- var myChild = me.firstChild;
- var retVal;
- while (myChild) {
- if ((retVal = callback(this, myChild)) != null)
- return retVal;
- if ((retVal = this.walkNodeChildren(myChild, callback)) != null)
- return retVal;
- myChild = myChild.nextSibling;
- }
- }
- };
-
- // Callback function to be performed on each node in the hierarchy
- // Sets flag to true if we find actual text or an element that's not usually displayed inline
- EnterParagraphs.prototype._isFilling = function(self, node) {
- if (node.nodeType == 1 && !self._html4_inlines_re.test(node.nodeName))
- return true;
- else if (node.nodeType == 3 && node.nodeValue != '')
- return true;
- return null;
- //alert(node.nodeName);
- };
-
- // Inserts a node deeply on the left of a hierarchy of nodes
- EnterParagraphs.prototype.insertDeepLeftText = function(target, toInsert) {
- var falling = target;
- while (falling.firstChild && falling.firstChild.nodeType == 1)
- falling = falling.firstChild;
- //var refNode = falling.firstChild ? falling.firstChild : null;
- //falling.insertBefore(toInsert, refNode);
- falling.innerHTML = toInsert;
- };
-
- // Kind of like a macros, for a frequent query...
- EnterParagraphs.prototype.isElem = function(node, type) {
- return node.nodeName.toLowerCase() == type.toLowerCase();
- };
-
- // The onKeyPress even that does all the work - nicely breaks the line into paragraphs
- EnterParagraphs.prototype.__onKeyPress = function(ev) {
-
- if (ev.keyCode == 13 && !ev.shiftKey && this.editor._iframe.contentWindow.getSelection) {
-
- var editor = this.editor;
-
- // Get the selection and solid references to what we're dealing with chopping
- var sel = editor._iframe.contentWindow.getSelection();
-
- // Set the start and end points such that they're going /forward/ through the document
- var rngLeft = editor._doc.createRange(); var rngRight = editor._doc.createRange();
- rngLeft.setStart(sel.anchorNode, sel.anchorOffset); rngRight.setStart(sel.focusNode, sel.focusOffset);
- rngLeft.collapse(true); rngRight.collapse(true);
-
- var direct = rngLeft.compareBoundaryPoints(rngLeft.START_TO_END, rngRight) < 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;
-
- // Find the parent blocks of nodes at either end, and their attributes if they're paragraphs
- var startBlock = this.parentBlock(startNode); var endBlock = this.parentBlock(endNode);
- var attrsLeft = new Array(); var attrsRight = new Array();
-
- // If a list, let the browser take over, if we're in a paragraph, gather it's attributes
- if (this.isElem(startBlock, 'li') || this.isElem(endBlock, 'li'))
- return;
-
- if (this.isElem(startBlock, 'p')) {
- for (var i = 0; i < startBlock.attributes.length; i++) {
- attrsLeft[startBlock.attributes[i].nodeName] = startBlock.attributes[i].nodeValue;
- }
- }
- if (this.isElem(endBlock, 'p')) {
- for (var i = 0; i < endBlock.attributes.length; i++) {
- // If we start and end within one paragraph, don't duplicate the 'id'
- if (endBlock != startBlock || endBlock.attributes[i].nodeName.toLowerCase() != 'id')
- attrsRight[endBlock.attributes[i].nodeName] = endBlock.attributes[i].nodeValue;
- }
- }
-
- // Look for where to start and end our chopping - within surrounding paragraphs
- // if they exist, or at the edges of the containing block, otherwise
- var startChop = startNode; var endChop = endNode;
-
- while ((startChop.previousSibling && !this.isElem(startChop.previousSibling, 'p'))
- || (startChop.parentNode && startChop.parentNode != startBlock && startChop.parentNode.nodeType != 9))
- startChop = startChop.previousSibling ? startChop.previousSibling : startChop.parentNode;
-
- while ((endChop.nextSibling && !this.isElem(endChop.nextSibling, 'p'))
- || (endChop.parentNode && endChop.parentNode != endBlock && endChop.parentNode.nodeType != 9))
- endChop = endChop.nextSibling ? endChop.nextSibling : endChop.parentNode;
-
- // Set up new paragraphs
- var pLeft = editor._doc.createElement('p'); var pRight = editor._doc.createElement('p');
-
- for (var attrName in attrsLeft) {
- var thisAttr = editor._doc.createAttribute(attrName);
- thisAttr.value = attrsLeft[attrName];
- pLeft.setAttributeNode(thisAttr);
- }
- for (var attrName in attrsRight) {
- var thisAttr = editor._doc.createAttribute(attrName);
- thisAttr.value = attrsRight[attrName];
- pRight.setAttributeNode(thisAttr);
- }
-
- // Get the ranges destined to be stuffed into new paragraphs
- rngLeft.setStartBefore(startChop);
- rngLeft.setEnd(startNode,startOffset);
- pLeft.appendChild(rngLeft.cloneContents()); // Copy into pLeft
-
- rngRight.setEndAfter(endChop);
- rngRight.setStart(endNode,endOffset);
- pRight.appendChild(rngRight.cloneContents()); // Copy into pRight
-
- // If either paragraph is empty, fill it with a nonbreakable space
- var foundBlock = false;
- foundBlock = this.walkNodeChildren(pLeft, this._isFilling);
- if (foundBlock != true)
- this.insertDeepLeftText(pLeft, ' ');
-
- foundBlock = false;
- foundBlock = this.walkNodeChildren(pRight, this._isFilling);
- if (foundBlock != true)
- this.insertDeepLeftText(pRight, ' ');
-
- // Get a range for everything to be replaced and replace it
- var rngAround = editor._doc.createRange();
-
- if (!startChop.previousSibling && this.isElem(startChop.parentNode, 'p'))
- rngAround.setStartBefore(startChop.parentNode);
- else
- rngAround.setStart(rngLeft.startContainer, rngLeft.startOffset);
-
- if (!endChop.nextSibling && this.isElem(endChop.parentNode, 'p'))
- rngAround.setEndAfter(endChop.parentNode);
- else
- rngAround.setEnd(rngRight.endContainer, rngRight.endOffset);
-
- rngAround.deleteContents();
- rngAround.insertNode(pRight);
- rngAround.insertNode(pLeft);
-
- // Set the selection to the start of the (second) new paragraph
- if (pRight.firstChild) {
- while (pRight.firstChild && this._html4_inlines_re.test(pRight.firstChild.nodeName))
- pRight = pRight.firstChild;
- // Slip into any inline tags
- if (pRight.firstChild && pRight.firstChild.nodeType == 3)
- pRight = pRight.firstChild; // and text, if they've got it
-
- var rngCaret = editor._doc.createRange();
- rngCaret.setStart(pRight, 0);
- rngCaret.collapse(true);
-
- sel = editor._iframe.contentWindow.getSelection();
- sel.removeAllRanges();
- sel.addRange(rngCaret);
- }
-
- // Stop the bubbling
- HTMLArea._stopEvent(ev);
- }
- };
-