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/**
* BookmarkManager.js
*
* Copyright, Moxiecode Systems AB
* Released under LGPL License.
*
* License: http://www.tinymce.com/license
* Contributing: http://www.tinymce.com/contributing
*/
/**
* This class handles selection bookmarks.
*
* @class tinymce.dom.BookmarkManager
*/
define("tinymce/dom/BookmarkManager", [
"tinymce/Env",
"tinymce/util/Tools"
], function(Env, Tools) {
/**
* Constructs a new BookmarkManager instance for a specific selection instance.
*
* @constructor
* @method BookmarkManager
* @param {tinymce.dom.Selection} selection Selection instance to handle bookmarks for.
*/
function BookmarkManager(selection) {
var dom = selection.dom;
/**
* Returns a bookmark location for the current selection. This bookmark object
* can then be used to restore the selection after some content modification to the document.
*
* @method getBookmark
* @param {Number} type Optional state if the bookmark should be simple or not. Default is complex.
* @param {Boolean} normalized Optional state that enables you to get a position that it would be after normalization.
* @return {Object} Bookmark object, use moveToBookmark with this object to restore the selection.
* @example
* // Stores a bookmark of the current selection
* var bm = tinymce.activeEditor.selection.getBookmark();
*
* tinymce.activeEditor.setContent(tinymce.activeEditor.getContent() + 'Some new content');
*
* // Restore the selection bookmark
* tinymce.activeEditor.selection.moveToBookmark(bm);
*/
this.getBookmark = function(type, normalized) {
var rng, rng2, id, collapsed, name, element, chr = '', styles;
function findIndex(name, element) {
var index = 0;
Tools.each(dom.select(name), function(node, i) {
if (node == element) {
index = i;
}
});
return index;
}
function normalizeTableCellSelection(rng) {
function moveEndPoint(start) {
var container, offset, childNodes, prefix = start ? 'start' : 'end';
container = rng[prefix + 'Container'];
offset = rng[prefix + 'Offset'];
if (container.nodeType == 1 && container.nodeName == "TR") {
childNodes = container.childNodes;
container = childNodes[Math.min(start ? offset : offset - 1, childNodes.length - 1)];
if (container) {
offset = start ? 0 : container.childNodes.length;
rng['set' + (start ? 'Start' : 'End')](container, offset);
}
}
}
moveEndPoint(true);
moveEndPoint();
return rng;
}
function getLocation() {
var rng = selection.getRng(true), root = dom.getRoot(), bookmark = {};
function getPoint(rng, start) {
var container = rng[start ? 'startContainer' : 'endContainer'],
offset = rng[start ? 'startOffset' : 'endOffset'], point = [], node, childNodes, after = 0;
if (container.nodeType == 3) {
if (normalized) {
for (node = container.previousSibling; node && node.nodeType == 3; node = node.previousSibling) {
offset += node.nodeValue.length;
}
}
point.push(offset);
} else {
childNodes = container.childNodes;
if (offset >= childNodes.length && childNodes.length) {
after = 1;
offset = Math.max(0, childNodes.length - 1);
}
point.push(dom.nodeIndex(childNodes[offset], normalized) + after);
}
for (; container && container != root; container = container.parentNode) {
point.push(dom.nodeIndex(container, normalized));
}
return point;
}
bookmark.start = getPoint(rng, true);
if (!selection.isCollapsed()) {
bookmark.end = getPoint(rng);
}
return bookmark;
}
if (type == 2) {
element = selection.getNode();
name = element ? element.nodeName : null;
if (name == 'IMG') {
return {name: name, index: findIndex(name, element)};
}
if (selection.tridentSel) {
return selection.tridentSel.getBookmark(type);
}
return getLocation();
}
// Handle simple range
if (type) {
return {rng: selection.getRng()};
}
rng = selection.getRng();
id = dom.uniqueId();
collapsed = selection.isCollapsed();
styles = 'overflow:hidden;line-height:0px';
// Explorer method
if (rng.duplicate || rng.item) {
// Text selection
if (!rng.item) {
rng2 = rng.duplicate();
try {
// Insert start marker
rng.collapse();
rng.pasteHTML('<span data-mce-type="bookmark" id="' + id + '_start" style="' + styles + '">' + chr + '</span>');
// Insert end marker
if (!collapsed) {
rng2.collapse(false);
// Detect the empty space after block elements in IE and move the
// end back one character <p></p>] becomes <p>]</p>
rng.moveToElementText(rng2.parentElement());
if (rng.compareEndPoints('StartToEnd', rng2) === 0) {
rng2.move('character', -1);
}
rng2.pasteHTML('<span data-mce-type="bookmark" id="' + id + '_end" style="' + styles + '">' + chr + '</span>');
}
} catch (ex) {
// IE might throw unspecified error so lets ignore it
return null;
}
} else {
// Control selection
element = rng.item(0);
name = element.nodeName;
return {name: name, index: findIndex(name, element)};
}
} else {
element = selection.getNode();
name = element.nodeName;
if (name == 'IMG') {
return {name: name, index: findIndex(name, element)};
}
// W3C method
rng2 = normalizeTableCellSelection(rng.cloneRange());
// Insert end marker
if (!collapsed) {
rng2.collapse(false);
rng2.insertNode(dom.create('span', {'data-mce-type': "bookmark", id: id + '_end', style: styles}, chr));
}
rng = normalizeTableCellSelection(rng);
rng.collapse(true);
rng.insertNode(dom.create('span', {'data-mce-type': "bookmark", id: id + '_start', style: styles}, chr));
}
selection.moveToBookmark({id: id, keep: 1});
return {id: id};
};
/**
* Restores the selection to the specified bookmark.
*
* @method moveToBookmark
* @param {Object} bookmark Bookmark to restore selection from.
* @return {Boolean} true/false if it was successful or not.
* @example
* // Stores a bookmark of the current selection
* var bm = tinymce.activeEditor.selection.getBookmark();
*
* tinymce.activeEditor.setContent(tinymce.activeEditor.getContent() + 'Some new content');
*
* // Restore the selection bookmark
* tinymce.activeEditor.selection.moveToBookmark(bm);
*/
this.moveToBookmark = function(bookmark) {
var rng, root, startContainer, endContainer, startOffset, endOffset;
function setEndPoint(start) {
var point = bookmark[start ? 'start' : 'end'], i, node, offset, children;
if (point) {
offset = point[0];
// Find container node
for (node = root, i = point.length - 1; i >= 1; i--) {
children = node.childNodes;
if (point[i] > children.length - 1) {
return;
}
node = children[point[i]];
}
// Move text offset to best suitable location
if (node.nodeType === 3) {
offset = Math.min(point[0], node.nodeValue.length);
}
// Move element offset to best suitable location
if (node.nodeType === 1) {
offset = Math.min(point[0], node.childNodes.length);
}
// Set offset within container node
if (start) {
rng.setStart(node, offset);
} else {
rng.setEnd(node, offset);
}
}
return true;
}
function restoreEndPoint(suffix) {
var marker = dom.get(bookmark.id + '_' + suffix), node, idx, next, prev, keep = bookmark.keep;
if (marker) {
node = marker.parentNode;
if (suffix == 'start') {
if (!keep) {
idx = dom.nodeIndex(marker);
} else {
node = marker.firstChild;
idx = 1;
}
startContainer = endContainer = node;
startOffset = endOffset = idx;
} else {
if (!keep) {
idx = dom.nodeIndex(marker);
} else {
node = marker.firstChild;
idx = 1;
}
endContainer = node;
endOffset = idx;
}
if (!keep) {
prev = marker.previousSibling;
next = marker.nextSibling;
// Remove all marker text nodes
Tools.each(Tools.grep(marker.childNodes), function(node) {
if (node.nodeType == 3) {
node.nodeValue = node.nodeValue.replace(/\uFEFF/g, '');
}
});
// Remove marker but keep children if for example contents where inserted into the marker
// Also remove duplicated instances of the marker for example by a
// split operation or by WebKit auto split on paste feature
while ((marker = dom.get(bookmark.id + '_' + suffix))) {
dom.remove(marker, 1);
}
// If siblings are text nodes then merge them unless it's Opera since it some how removes the node
// and we are sniffing since adding a lot of detection code for a browser with 3% of the market
// isn't worth the effort. Sorry, Opera but it's just a fact
if (prev && next && prev.nodeType == next.nodeType && prev.nodeType == 3 && !Env.opera) {
idx = prev.nodeValue.length;
prev.appendData(next.nodeValue);
dom.remove(next);
if (suffix == 'start') {
startContainer = endContainer = prev;
startOffset = endOffset = idx;
} else {
endContainer = prev;
endOffset = idx;
}
}
}
}
}
function addBogus(node) {
// Adds a bogus BR element for empty block elements
if (dom.isBlock(node) && !node.innerHTML && !Env.ie) {
node.innerHTML = '<br data-mce-bogus="1" />';
}
return node;
}
if (bookmark) {
if (bookmark.start) {
rng = dom.createRng();
root = dom.getRoot();
if (selection.tridentSel) {
return selection.tridentSel.moveToBookmark(bookmark);
}
if (setEndPoint(true) && setEndPoint()) {
selection.setRng(rng);
}
} else if (bookmark.id) {
// Restore start/end points
restoreEndPoint('start');
restoreEndPoint('end');
if (startContainer) {
rng = dom.createRng();
rng.setStart(addBogus(startContainer), startOffset);
rng.setEnd(addBogus(endContainer), endOffset);
selection.setRng(rng);
}
} else if (bookmark.name) {
selection.select(dom.select(bookmark.name)[bookmark.index]);
} else if (bookmark.rng) {
selection.setRng(bookmark.rng);
}
}
};
}
/**
* Returns true/false if the specified node is a bookmark node or not.
*
* @static
* @method isBookmarkNode
* @param {DOMNode} node DOM Node to check if it's a bookmark node or not.
* @return {Boolean} true/false if the node is a bookmark node or not.
*/
BookmarkManager.isBookmarkNode = function(node) {
return node && node.tagName === 'SPAN' && node.getAttribute('data-mce-type') === 'bookmark';
};
return BookmarkManager;
});