Refactored-out the code of thumbnaling algorithm from thumbnail_tab_helper.

chrome/browser/thumbnails/thumbnail_service_impl.cc

 // 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/memory/ref_counted_memory.h"
 #include "chrome/browser/history/history.h"
+#include "chrome/browser/thumbnails/simple_thumbnail_crop.h"
+#include "chrome/browser/thumbnails/thumbnailing_context.h"
+
+namespace {
+
+// The thumbnail size in DIP.
+static const int kThumbnailWidth = 212;

[sky, 2013/01/17 20:18:36]

don't need static here.

[motek., 2013/01/18 18:38:41]

Done.

+static const int kThumbnailHeight = 132;
+
+}
 
 namespace thumbnails {
 
 ThumbnailServiceImpl::ThumbnailServiceImpl(Profile* profile)
     : top_sites_(profile->GetTopSites()) {
 }
 
 ThumbnailServiceImpl::~ThumbnailServiceImpl() {
 }
 
-bool ThumbnailServiceImpl::SetPageThumbnail(const GURL& url,
-                                            const gfx::Image& thumbnail,
-                                            const ThumbnailScore& score) {
+bool ThumbnailServiceImpl::SetPageThumbnail(const ThumbnailingContext& context,
+                                            const gfx::Image& thumbnail) {
   scoped_refptr<history::TopSites> local_ptr(top_sites_);
   if (local_ptr == NULL)
     return false;
 
-  return local_ptr->SetPageThumbnail(url, thumbnail, score);
+  return local_ptr->SetPageThumbnail(context.url, thumbnail, context.score);
 }
 
 bool ThumbnailServiceImpl::GetPageThumbnail(
     const GURL& url,
     scoped_refptr<base::RefCountedMemory>* bytes) {
   scoped_refptr<history::TopSites> local_ptr(top_sites_);
   if (local_ptr == NULL)
     return false;
 
   return local_ptr->GetPageThumbnail(url, bytes);
 }
 
+ThumbnailingAlgorithm* ThumbnailServiceImpl::CreateThumbnailingAlgorithm()
+    const {
+  return new SimpleThumbnailCrop(gfx::Size(kThumbnailWidth, kThumbnailHeight));
+}
+
 bool ThumbnailServiceImpl::ShouldAcquirePageThumbnail(const GURL& url) {
   scoped_refptr<history::TopSites> local_ptr(top_sites_);
 
   if (local_ptr == NULL)
     return false;
 
   // Skip if the given URL is not appropriate for history.
   if (!HistoryService::CanAddURL(url))
     return false;
   // Skip if the top sites list is full, and the URL is not known.
@@ skipping 15 matching lines @@
 }
 
 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;
 }
 
 }