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// 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/browser/dom_ui/dom_ui_thumbnail_source.h"
#include "app/gfx/codec/jpeg_codec.h"
#include "app/resource_bundle.h"
#include "base/command_line.h"
#include "chrome/browser/profile.h"
#include "chrome/browser/thumbnail_store.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/notification_service.h"
#include "chrome/common/url_constants.h"
#include "googleurl/src/gurl.h"
#include "grit/theme_resources.h"
#include "third_party/skia/include/core/SkBitmap.h"
DOMUIThumbnailSource::DOMUIThumbnailSource(Profile* profile)
: DataSource(chrome::kChromeUIThumbnailPath, MessageLoop::current()),
profile_(profile) {
}
void DOMUIThumbnailSource::StartDataRequest(const std::string& path,
int request_id) {
if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kThumbnailStore)) {
scoped_refptr<ThumbnailStore> store_ = profile_->GetThumbnailStore();
if (!store_->IsReady()) {
// Register to be notified when the ThumbnailStore is ready.
if (registrar_.IsEmpty()) {
registrar_.Add(this, NotificationType::THUMBNAIL_STORE_READY,
Source<ThumbnailStore>(store_.get()));
}
// Insert into pending_requests.
pending_requests_.push_back(std::make_pair(path, request_id));
} else {
DoDataRequest(path, request_id);
}
return;
} // end --thumbnail-store switch
HistoryService* hs = profile_->GetHistoryService(Profile::EXPLICIT_ACCESS);
if (hs) {
HistoryService::Handle handle = hs->GetPageThumbnail(
GURL(path),
&cancelable_consumer_,
NewCallback(this, &DOMUIThumbnailSource::OnThumbnailDataAvailable));
// Attach the ChromeURLDataManager request ID to the history request.
cancelable_consumer_.SetClientData(hs, handle, request_id);
} else {
// Tell the caller that no thumbnail is available.
SendResponse(request_id, NULL);
}
}
void DOMUIThumbnailSource::DoDataRequest(const std::string& path,
int request_id) {
RefCountedBytes* data = NULL;
scoped_refptr<ThumbnailStore> store_ = profile_->GetThumbnailStore();
if (store_->GetPageThumbnail(GURL(path), &data)) {
// Got the thumbnail.
SendResponse(request_id, data);
} else {
// Don't have the thumbnail so return the default thumbnail.
if (!default_thumbnail_.get()) {
default_thumbnail_ =
ResourceBundle::GetSharedInstance().LoadImageResourceBytes(
IDR_DEFAULT_THUMBNAIL);
}
SendResponse(request_id, default_thumbnail_);
}
}
void DOMUIThumbnailSource::OnThumbnailDataAvailable(
HistoryService::Handle request_handle,
scoped_refptr<RefCountedBytes> data) {
HistoryService* hs =
profile_->GetHistoryService(Profile::EXPLICIT_ACCESS);
int request_id = cancelable_consumer_.GetClientData(hs, request_handle);
// Forward the data along to the networking system.
if (data.get() && !data->data.empty()) {
SendResponse(request_id, data);
} else {
if (!default_thumbnail_.get()) {
default_thumbnail_ =
ResourceBundle::GetSharedInstance().LoadImageResourceBytes(
IDR_DEFAULT_THUMBNAIL);
}
SendResponse(request_id, default_thumbnail_);
}
}
void DOMUIThumbnailSource::Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
if (type.value != NotificationType::THUMBNAIL_STORE_READY) {
NOTREACHED();
return;
}
// This notification is sent only once.
registrar_.RemoveAll();
for (size_t i = 0; i < pending_requests_.size(); ++i)
DoDataRequest(pending_requests_[i].first, pending_requests_[i].second);
pending_requests_.clear();
}
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