Local salient image storage for enhanced bookmark experiment.

components/bookmarks_enhanced/memory_image_store.cc

+// Copyright 2014 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 "components/bookmarks_enhanced/memory_image_store.h"
+
+#include "ui/gfx/geometry/size.h"
+#include "url/gurl.h"
+
+MemoryImageStore::MemoryImageStore() {
+}
+
+MemoryImageStore::~MemoryImageStore() {
+  DCHECK(CalledOnValidThread());
+}
+
+bool MemoryImageStore::HasKey(const GURL& page_url) {
+  DCHECK(CalledOnValidThread());
+
+  return store_.find(page_url) != store_.end();
+}
+
+void MemoryImageStore::Insert(const GURL& page_url,
+                              const GURL& image_url,
+                              const gfx::Image& image) {
+  DCHECK(CalledOnValidThread());
+
+  Erase(page_url);
+  store_.insert(std::make_pair(
+      page_url,
+      std::make_pair(image,
+                     image_url)));
+}
+
+void MemoryImageStore::Erase(const GURL& page_url) {
+  DCHECK(CalledOnValidThread());
+
+  store_.erase(page_url);
+}
+
+gfx::Image MemoryImageStore::Get(const GURL& page_url, GURL* image_url) {
+  DCHECK(CalledOnValidThread());
+  DCHECK(image_url);
+
+  ImageMap::const_iterator pair_enumerator = store_.find(page_url);
+  if (pair_enumerator == store_.end())
+    return gfx::Image();
+
+  *image_url = store_[page_url].second;
+  return store_[page_url].first;
+}
+
+gfx::Size MemoryImageStore::GetSize(const GURL& page_url) {
+  DCHECK(CalledOnValidThread());
+
+  ImageMap::const_iterator pair_enumerator = store_.find(page_url);
+  if (pair_enumerator == store_.end())
+    return gfx::Size();
+
+  return store_[page_url].first.Size();
+}
+
+void MemoryImageStore::GetAllPageUrls(std::vector<GURL>* urls) {
+  DCHECK(CalledOnValidThread());
+  DCHECK(urls->empty());
+
+  for (ImageMap::const_iterator it = store_.begin(); it != store_.end(); ++it) {
+    urls->push_back(it->first);
+  }
+}
+
+void ImageStore::ChangeImageURL(const GURL& from, const GURL& to) {
+  DCHECK(CalledOnValidThread());
+
+  if (!HasKey(from))
+    return;
+  GURL image_url;
+  gfx::Image image(Get(from, &image_url));
+
+  Erase(from);
+  Insert(to, image_url, image);
+}
+
+// Removes all images.
+void ImageStore::ClearAll() {
+  DCHECK(CalledOnValidThread());
+
+  std::vector<GURL> all_keys;
+  GetAllPageUrls(&all_keys);
+  for (std::vector<GURL>::const_iterator it = all_keys.begin();
+       it != all_keys.end();
+       ++it) {
+    Erase(*it);
+  }
+}