AppCachePlumbing

chrome/common/app_cache/app_cache_context_impl.cc

+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/common/app_cache/app_cache_context_impl.h"
+
+#include "base/logging.h"
+#include "chrome/common/render_messages.h"
+#include "chrome/common/child_thread.h"
+#include "googleurl/src/gurl.h"
+
+IDMap<AppCacheContextImpl> AppCacheContextImpl::all_contexts;
+
+// static
+AppCacheContextImpl* AppCacheContextImpl::FromContextId(int id) {
+  return all_contexts.Lookup(id);
+}
+
+AppCacheContextImpl::AppCacheContextImpl(IPC::Message::Sender *sender)
+  : context_id_(kNoAppCacheContextId),
+    app_cache_id_(kUnknownAppCacheId),
+    pending_select_request_id_(0),
+    sender_(sender) {
+  DCHECK(sender_);
+}
+
+AppCacheContextImpl::~AppCacheContextImpl() {
+  UnInitializeContext();
+}
+
+void AppCacheContextImpl::Initialize(ContextType context_type,
+                                     WebAppCacheContext *parent) {
+  DCHECK(context_id_ == kNoAppCacheContextId);
+  DCHECK(((context_type == MAIN_FRAME) && !parent) ||
+         ((context_type != MAIN_FRAME) && parent));
+
+  context_id_ = all_contexts.Add(this);
+  CHECK(context_id_ != kNoAppCacheContextId);
+
+  sender_->Send(new AppCacheMsg_ContextCreated(context_type,
+                                               context_id_,
+                                               parent ? parent->context_id()
+                                                      : kNoAppCacheContextId));
+}
+
+void AppCacheContextImpl::UnInitializeContext() {
+  if (context_id_ != kNoAppCacheContextId) {
+    sender_->Send(new AppCacheMsg_ContextDestroyed(context_id_));
+    all_contexts.Remove(context_id_);
+    context_id_ = kNoAppCacheContextId;
+  }
+}
+
+void AppCacheContextImpl::SelectAppCacheWithoutManifest(
+                              const GURL &document_url,
+                              int64 cache_document_was_loaded_from) {
+  DCHECK(context_id_ != kNoAppCacheContextId);
+  app_cache_id_ = kUnknownAppCacheId;  // unknown until we get a response
+  sender_->Send(new AppCacheMsg_SelectAppCache(
+                         context_id_, ++pending_select_request_id_,
+                         document_url, cache_document_was_loaded_from,
+                         GURL::EmptyGURL()));
+}
+
+void AppCacheContextImpl::SelectAppCacheWithManifest(
+                              const GURL &document_url,
+                              int64 cache_document_was_loaded_from,
+                              const GURL &manifest_url) {
+  DCHECK(context_id_ != kNoAppCacheContextId);
+  app_cache_id_ = kUnknownAppCacheId;  // unknown until we get a response
+  sender_->Send(new AppCacheMsg_SelectAppCache(
+                         context_id_, ++pending_select_request_id_,
+                         document_url, cache_document_was_loaded_from,
+                         manifest_url));
+}
+
+void AppCacheContextImpl::OnAppCacheSelected(int select_request_id,
+                                             int64 app_cache_id) {
+  if (select_request_id == pending_select_request_id_) {
+    DCHECK(app_cache_id_ == kUnknownAppCacheId);
+    DCHECK(app_cache_id != kUnknownAppCacheId);
+    app_cache_id_ = app_cache_id;
+  }
+}