mirror of
https://github.com/RGBCube/serenity
synced 2025-07-25 13:27:35 +00:00
LibWeb: Start building a new Resource class to share more resources
A Resource represents a resource that we're loading, have loaded or will soon load. Basically, it's a downloadable resource that can be shared by multiple clients. A typical usecase is multiple <img> elements with the same src. In a future patch, we will try to make sure that those <img> elements get the same Resource if possible. This will reduce network usage, memory usage, and CPU usage. :^) For now, this first patch simply introduces the mechanism. You get a Resource by calling ResourceLoader::load_resource(). To get notified about changes to a Resource's load status, you inherit from ResourceClient and implement the callbacks you're interested in. This patch turns HTMLImageElement into a ResourceClient.
This commit is contained in:
parent
7be9cf8d36
commit
5ed66cb8d9
8 changed files with 274 additions and 23 deletions
105
Libraries/LibWeb/Loader/Resource.h
Normal file
105
Libraries/LibWeb/Loader/Resource.h
Normal file
|
@ -0,0 +1,105 @@
|
|||
/*
|
||||
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
|
||||
* 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT HOLDER OR 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.
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <AK/ByteBuffer.h>
|
||||
#include <AK/HashMap.h>
|
||||
#include <AK/HashTable.h>
|
||||
#include <AK/Noncopyable.h>
|
||||
#include <AK/RefCounted.h>
|
||||
#include <AK/URL.h>
|
||||
#include <LibWeb/Forward.h>
|
||||
|
||||
namespace Web {
|
||||
|
||||
class ResourceClient;
|
||||
|
||||
class Resource : public RefCounted<Resource> {
|
||||
AK_MAKE_NONCOPYABLE(Resource);
|
||||
AK_MAKE_NONMOVABLE(Resource);
|
||||
|
||||
public:
|
||||
static NonnullRefPtr<Resource> create(Badge<ResourceLoader>, const URL&);
|
||||
~Resource();
|
||||
|
||||
bool is_loaded() const { return m_loaded; }
|
||||
|
||||
bool is_failed() const { return m_failed; }
|
||||
const String& error() const { return m_error; }
|
||||
|
||||
bool has_encoded_data() const { return !m_encoded_data.is_null(); }
|
||||
|
||||
const URL& url() const { return m_url; }
|
||||
const ByteBuffer& encoded_data() const { return m_encoded_data; }
|
||||
|
||||
void register_client(Badge<ResourceClient>, ResourceClient&);
|
||||
void unregister_client(Badge<ResourceClient>, ResourceClient&);
|
||||
|
||||
template<typename Callback>
|
||||
void for_each_client(Callback callback)
|
||||
{
|
||||
// FIXME: This should use some kind of smart pointer to ResourceClient!
|
||||
Vector<ResourceClient*, 16> clients_copy;
|
||||
clients_copy.ensure_capacity(m_clients.size());
|
||||
for (auto* client : m_clients)
|
||||
clients_copy.append(client);
|
||||
for (auto* client : clients_copy)
|
||||
callback(*client);
|
||||
}
|
||||
|
||||
void did_load(Badge<ResourceLoader>, const ByteBuffer& data, const HashMap<String, String, CaseInsensitiveStringTraits>& headers);
|
||||
void did_fail(Badge<ResourceLoader>, const String& error);
|
||||
|
||||
private:
|
||||
explicit Resource(const URL&);
|
||||
|
||||
URL m_url;
|
||||
ByteBuffer m_encoded_data;
|
||||
bool m_loaded { false };
|
||||
bool m_failed { false };
|
||||
String m_error;
|
||||
HashMap<String, String, CaseInsensitiveStringTraits> m_response_headers;
|
||||
HashTable<ResourceClient*> m_clients;
|
||||
};
|
||||
|
||||
class ResourceClient {
|
||||
public:
|
||||
virtual ~ResourceClient();
|
||||
|
||||
virtual void resource_did_load() { }
|
||||
virtual void resource_did_fail() { }
|
||||
|
||||
protected:
|
||||
Resource* resource() { return m_resource; }
|
||||
const Resource* resource() const { return m_resource; }
|
||||
void set_resource(Resource*);
|
||||
|
||||
private:
|
||||
RefPtr<Resource> m_resource;
|
||||
};
|
||||
|
||||
}
|
Loading…
Add table
Add a link
Reference in a new issue