blob: 88608f56910c94e47f76d755afd7eb80506da6d7 [file] [log] [blame]
/*
* Copyright (C) 2013 Apple Inc. All rights reserved.
* Copyright (C) 2016 Devin Rousso <webkit@devinrousso.com>. All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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.ResourceCollection = class ResourceCollection extends WI.Collection
{
constructor(resourceType)
{
super();
this._resourceType = resourceType || null;
this._resourceURLMap = new Map;
this._resourcesTypeMap = new Map;
}
// Public
get resourceType() { return this._resourceType; }
get displayName()
{
const plural = true;
return this._resourceType ? WI.Resource.displayNameForType(this._resourceType, plural) : WI.UIString("Resources");
}
objectIsRequiredType(object)
{
if (!(object instanceof WI.Resource))
return false;
if (!this._resourceType)
return true;
if (this._resourceType === WI.Resource.Type.Stylesheet && object instanceof WI.CSSStyleSheet)
return true;
return object.type === this._resourceType;
}
resourceForURL(url)
{
return this._resourceURLMap.get(url) || null;
}
resourceCollectionForType(type)
{
if (this._resourceType) {
console.assert(type === this._resourceType);
return this;
}
let resourcesCollectionForType = this._resourcesTypeMap.get(type);
if (!resourcesCollectionForType) {
resourcesCollectionForType = new WI.ResourceCollection(type);
this._resourcesTypeMap.set(type, resourcesCollectionForType);
}
return resourcesCollectionForType;
}
clear()
{
super.clear();
this._resourceURLMap.clear();
if (!this._resourceType)
this._resourcesTypeMap.clear();
}
// Protected
itemAdded(item)
{
this._associateWithResource(item);
}
itemRemoved(item)
{
this._disassociateWithResource(item);
}
itemsCleared(items)
{
const skipRemoval = true;
for (let item of items)
this._disassociateWithResource(item, skipRemoval);
}
// Private
_associateWithResource(resource)
{
this._resourceURLMap.set(resource.url, resource);
if (!this._resourceType) {
let resourcesCollectionForType = this.resourceCollectionForType(resource.type);
resourcesCollectionForType.add(resource);
}
resource.addEventListener(WI.Resource.Event.URLDidChange, this._resourceURLDidChange, this);
resource.addEventListener(WI.Resource.Event.TypeDidChange, this._resourceTypeDidChange, this);
}
_disassociateWithResource(resource, skipRemoval)
{
resource.removeEventListener(WI.Resource.Event.URLDidChange, this._resourceURLDidChange, this);
resource.removeEventListener(WI.Resource.Event.TypeDidChange, this._resourceTypeDidChange, this);
if (skipRemoval)
return;
if (!this._resourceType) {
let resourcesCollectionForType = this.resourceCollectionForType(resource.type);
resourcesCollectionForType.remove(resource);
}
this._resourceURLMap.delete(resource.url);
}
_resourceURLDidChange(event)
{
let resource = event.target;
console.assert(resource instanceof WI.Resource);
if (!(resource instanceof WI.Resource))
return;
let oldURL = event.data.oldURL;
console.assert(oldURL);
if (!oldURL)
return;
this._resourceURLMap.set(resource.url, resource);
this._resourceURLMap.delete(oldURL);
}
_resourceTypeDidChange(event)
{
let resource = event.target;
console.assert(resource instanceof WI.Resource);
if (!(resource instanceof WI.Resource))
return;
if (this._resourceType) {
console.assert(resource.type !== this._resourceType);
this.remove(resource);
return;
}
console.assert(event.data.oldType);
let resourcesWithNewType = this.resourceCollectionForType(resource.type);
resourcesWithNewType.add(resource);
// It is not necessary to remove the resource from the sub-collection for the old type since
// this is handled by that sub-collection's own _resourceTypeDidChange handler (via the
// above if statement).
}
};