blob: c4807d37531fb63e5289fa0f216163f39ae95319 [file] [log] [blame]
// Copyright (c) 2012 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/thumbnails/thumbnail_service_impl.h"
#include "base/feature_list.h"
#include "base/memory/ref_counted_memory.h"
#include "base/time/time.h"
#include "chrome/browser/history/history_utils.h"
#include "chrome/browser/history/top_sites_factory.h"
#include "chrome/browser/thumbnails/thumbnailing_context.h"
#include "chrome/common/chrome_features.h"
#include "content/public/browser/browser_thread.h"
#include "url/gurl.h"
using content::BrowserThread;
namespace {
void AddForcedURLOnUIThread(scoped_refptr<history::TopSites> top_sites,
const GURL& url) {
if (top_sites)
top_sites->AddForcedURL(url, base::Time::Now());
} // namespace
namespace thumbnails {
ThumbnailServiceImpl::ThumbnailServiceImpl(Profile* profile)
: top_sites_(TopSitesFactory::GetForProfile(profile)) {}
ThumbnailServiceImpl::~ThumbnailServiceImpl() {
bool ThumbnailServiceImpl::SetPageThumbnail(const ThumbnailingContext& context,
const gfx::Image& thumbnail) {
scoped_refptr<history::TopSites> local_ptr(top_sites_);
if (!local_ptr)
return false;
return local_ptr->SetPageThumbnail(context.url, thumbnail, context.score);
bool ThumbnailServiceImpl::GetPageThumbnail(
const GURL& url,
bool prefix_match,
scoped_refptr<base::RefCountedMemory>* bytes) {
scoped_refptr<history::TopSites> local_ptr(top_sites_);
if (!local_ptr)
return false;
return local_ptr->GetPageThumbnail(url, prefix_match, bytes);
void ThumbnailServiceImpl::AddForcedURL(const GURL& url) {
scoped_refptr<history::TopSites> local_ptr(top_sites_);
if (!local_ptr)
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
base::Bind(AddForcedURLOnUIThread, local_ptr, url));
bool ThumbnailServiceImpl::ShouldAcquirePageThumbnail(
const GURL& url,
ui::PageTransition transition) {
scoped_refptr<history::TopSites> local_ptr(top_sites_);
if (!local_ptr)
return false;
// Skip if the given URL is not appropriate for history.
if (!CanAddURLToHistory(url))
return false;
// If the URL is not known (i.e. not a top site yet), do some extra checks.
if (!local_ptr->IsKnownURL(url)) {
// Skip if the top sites list is full - no point in taking speculative
// thumbnails.
if (local_ptr->IsNonForcedFull())
return false;
// Skip if the transition type is not interesting:
// Only new segments (roughly "initial navigations", e.g. not clicks on a
// link) can end up in TopSites (see HistoryBackend::UpdateSegments).
// Note that for pages that are already in TopSites, we don't care about
// the transition type, since for those we know we'll need the thumbnail.
if (!ui::PageTransitionCoreTypeIs(transition, ui::PAGE_TRANSITION_TYPED) &&
return false;
// Skip if we don't have to update the existing thumbnail.
ThumbnailScore current_score;
if (local_ptr->GetPageThumbnailScore(url, &current_score) &&
!current_score.ShouldConsiderUpdating()) {
return false;
// Skip if we don't have to update the temporary thumbnail (i.e. the one
// not yet saved).
ThumbnailScore temporary_score;
if (local_ptr->GetTemporaryPageThumbnailScore(url, &temporary_score) &&
!temporary_score.ShouldConsiderUpdating()) {
return false;
return true;
void ThumbnailServiceImpl::ShutdownOnUIThread() {
// Since each call uses its own scoped_refptr, we can just clear the reference
// here by assigning null. If another call is completed, it added its own
// reference.
top_sites_ = NULL;
} // namespace thumbnails