blob: 62c700fd95c700d5173267b8425993886a8f122f [file] [log] [blame]
/*
* Copyright (C) 2007, 2008, 2013, 2016 Apple Inc. All rights reserved.
* Copyright (C) 2008 Matt Lilek <webkit@mattlilek.com>
* Copyright (C) 2009 Joseph Pecoraro
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
WI.DOMTreeUpdater = function(treeOutline)
{
WI.domManager.addEventListener(WI.DOMManager.Event.NodeInserted, this._nodeInserted, this);
WI.domManager.addEventListener(WI.DOMManager.Event.NodeRemoved, this._nodeRemoved, this);
WI.domManager.addEventListener(WI.DOMManager.Event.AttributeModified, this._attributesUpdated, this);
WI.domManager.addEventListener(WI.DOMManager.Event.AttributeRemoved, this._attributesUpdated, this);
WI.domManager.addEventListener(WI.DOMManager.Event.CharacterDataModified, this._characterDataModified, this);
WI.domManager.addEventListener(WI.DOMManager.Event.DocumentUpdated, this._documentUpdated, this);
WI.domManager.addEventListener(WI.DOMManager.Event.ChildNodeCountUpdated, this._childNodeCountUpdated, this);
this._treeOutline = treeOutline;
this._recentlyInsertedNodes = new Map;
this._recentlyDeletedNodes = new Map;
this._recentlyModifiedNodes = new Set;
// Map from attribute names to nodes that had the attributes.
this._recentlyModifiedAttributes = new Map;
// Dummy "attribute" that is used to track textContent changes.
this._textContentAttributeSymbol = Symbol("text-content-attribute");
this._updateModifiedNodesDebouncer = new Debouncer(() => {
this._updateModifiedNodes();
});
};
WI.DOMTreeUpdater.prototype = {
close: function()
{
WI.domManager.removeEventListener(WI.DOMManager.Event.NodeInserted, this._nodeInserted, this);
WI.domManager.removeEventListener(WI.DOMManager.Event.NodeRemoved, this._nodeRemoved, this);
WI.domManager.removeEventListener(WI.DOMManager.Event.AttributeModified, this._attributesUpdated, this);
WI.domManager.removeEventListener(WI.DOMManager.Event.AttributeRemoved, this._attributesUpdated, this);
WI.domManager.removeEventListener(WI.DOMManager.Event.CharacterDataModified, this._characterDataModified, this);
WI.domManager.removeEventListener(WI.DOMManager.Event.DocumentUpdated, this._documentUpdated, this);
WI.domManager.removeEventListener(WI.DOMManager.Event.ChildNodeCountUpdated, this._childNodeCountUpdated, this);
},
_documentUpdated: function(event)
{
this._reset();
},
_attributesUpdated: function(event)
{
let {node, name} = event.data;
this._nodeAttributeModified(node, name);
},
_characterDataModified: function(event)
{
let {node} = event.data;
this._nodeAttributeModified(node, this._textContentAttributeSymbol);
},
_nodeAttributeModified: function(node, attribute)
{
if (!this._recentlyModifiedAttributes.has(attribute))
this._recentlyModifiedAttributes.set(attribute, new Set);
this._recentlyModifiedAttributes.get(attribute).add(node);
this._recentlyModifiedNodes.add(node);
if (this._treeOutline._visible)
this._updateModifiedNodesDebouncer.delayForFrame();
},
_nodeInserted: function(event)
{
this._recentlyInsertedNodes.set(event.data.node, {parent: event.data.parent});
if (this._treeOutline._visible)
this._updateModifiedNodesDebouncer.delayForFrame();
},
_nodeRemoved: function(event)
{
let parent = event.data.parent;
if (!parent)
return;
this._recentlyDeletedNodes.set(event.data.node, {parent});
if (this._treeOutline._visible)
this._updateModifiedNodesDebouncer.delayForFrame();
},
_childNodeCountUpdated: function(event)
{
var treeElement = this._treeOutline.findTreeElement(event.data);
if (treeElement)
treeElement.hasChildren = event.data.hasChildNodes();
},
_updateModifiedNodes: function()
{
// Update for insertions and deletions before attribute modifications. This ensures
// tree elements get created for newly attached children before we try to update them.
let parentElementsToUpdate = new Set;
let markNodeParentForUpdate = (value, key, map) => {
let parentNode = value.parent;
let parentTreeElement = this._treeOutline.findTreeElement(parentNode);
if (parentTreeElement)
parentElementsToUpdate.add(parentTreeElement);
};
this._recentlyInsertedNodes.forEach(markNodeParentForUpdate);
this._recentlyDeletedNodes.forEach(markNodeParentForUpdate);
for (let parentTreeElement of parentElementsToUpdate) {
if (parentTreeElement.treeOutline && parentTreeElement.listItemElement) {
parentTreeElement.updateTitle();
parentTreeElement.updateChildren();
}
}
for (let node of this._recentlyModifiedNodes.values()) {
let nodeTreeElement = this._treeOutline.findTreeElement(node);
if (!nodeTreeElement)
continue;
for (let [attribute, nodes] of this._recentlyModifiedAttributes.entries()) {
// Don't report textContent changes as attribute modifications.
if (attribute === this._textContentAttributeSymbol)
continue;
if (nodes.has(node))
nodeTreeElement.attributeDidChange(attribute);
}
nodeTreeElement.updateTitle();
}
this._recentlyInsertedNodes.clear();
this._recentlyDeletedNodes.clear();
this._recentlyModifiedNodes.clear();
this._recentlyModifiedAttributes.clear();
},
_reset: function()
{
WI.domManager.hideDOMNodeHighlight();
this._recentlyInsertedNodes.clear();
this._recentlyDeletedNodes.clear();
this._recentlyModifiedNodes.clear();
this._recentlyModifiedAttributes.clear();
}
};