Componentize FaviconTabHelper

components/favicon/content/content_favicon_driver.cc

Index: components/favicon/content/content_favicon_driver.cc
diff --git a/components/favicon/content/content_favicon_driver.cc b/components/favicon/content/content_favicon_driver.cc
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+++ b/components/favicon/content/content_favicon_driver.cc
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+// Copyright 2015 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/favicon/content/content_favicon_driver.h"
+
+#include "base/bind.h"
+#include "components/favicon/content/favicon_url_util.h"
+#include "components/favicon/core/favicon_url.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/browser/favicon_status.h"
+#include "content/public/browser/navigation_controller.h"
+#include "content/public/browser/navigation_details.h"
+#include "content/public/browser/navigation_entry.h"
+#include "content/public/common/favicon_url.h"
+#include "ui/gfx/image/image.h"
+
+DEFINE_WEB_CONTENTS_USER_DATA_KEY(favicon::ContentFaviconDriver);
+
+namespace favicon {
+
+// static
+void ContentFaviconDriver::CreateForWebContents(
+    content::WebContents* web_contents,
+    FaviconService* favicon_service,
+    history::HistoryService* history_service,
+    bookmarks::BookmarkModel* bookmark_model) {
+  if (FromWebContents(web_contents))
+    return;
+
+  web_contents->SetUserData(
+      UserDataKey(), new ContentFaviconDriver(web_contents, favicon_service,
+                                              history_service, bookmark_model));
+}
+
+gfx::Image ContentFaviconDriver::GetFavicon() const {
+  // Like GetTitle(), we also want to use the favicon for the last committed
+  // entry rather than a pending navigation entry.
+  const content::NavigationController& controller =
+      web_contents()->GetController();
+  content::NavigationEntry* entry = controller.GetTransientEntry();
+  if (entry)
+    return entry->GetFavicon().image;
+
+  entry = controller.GetLastCommittedEntry();
+  if (entry)
+    return entry->GetFavicon().image;
+  return gfx::Image();
+}
+
+bool ContentFaviconDriver::FaviconIsValid() const {
+  const content::NavigationController& controller =
+      web_contents()->GetController();
+  content::NavigationEntry* entry = controller.GetTransientEntry();
+  if (entry)
+    return entry->GetFavicon().valid;
+
+  entry = controller.GetLastCommittedEntry();
+  if (entry)
+    return entry->GetFavicon().valid;
+
+  return false;
+}
+
+int ContentFaviconDriver::StartDownload(const GURL& url, int max_image_size) {
+  if (WasUnableToDownloadFavicon(url)) {
+    DVLOG(1) << "Skip Failed FavIcon: " << url;
+    return 0;
+  }
+
+  bool bypass_cache = (bypass_cache_page_url_ == GetActiveURL());
+  bypass_cache_page_url_ = GURL();
+
+  return web_contents()->DownloadImage(
+      url, true, max_image_size, bypass_cache,
+      base::Bind(&FaviconDriverImpl::DidDownloadFavicon,
+                 base::Unretained(this)));
+}
+
+bool ContentFaviconDriver::IsOffTheRecord() {
+  DCHECK(web_contents());
+  return web_contents()->GetBrowserContext()->IsOffTheRecord();
+}
+
+GURL ContentFaviconDriver::GetActiveURL() {
+  content::NavigationEntry* entry =
+      web_contents()->GetController().GetActiveEntry();
+  return entry ? entry->GetURL() : GURL();
+}
+
+base::string16 ContentFaviconDriver::GetActiveTitle() {
+  content::NavigationEntry* entry =
+      web_contents()->GetController().GetActiveEntry();
+  return entry ? entry->GetTitle() : base::string16();
+}
+
+bool ContentFaviconDriver::GetActiveFaviconValidity() {
+  return GetFaviconStatus().valid;
+}
+
+void ContentFaviconDriver::SetActiveFaviconValidity(bool valid) {
+  GetFaviconStatus().valid = valid;
+}
+
+GURL ContentFaviconDriver::GetActiveFaviconURL() {
+  return GetFaviconStatus().url;
+}
+
+void ContentFaviconDriver::SetActiveFaviconURL(const GURL& url) {
+  GetFaviconStatus().url = url;
+}
+
+gfx::Image ContentFaviconDriver::GetActiveFaviconImage() {
+  return GetFaviconStatus().image;
+}
+
+void ContentFaviconDriver::SetActiveFaviconImage(const gfx::Image& image) {
+  GetFaviconStatus().image = image;
+}
+
+content::FaviconStatus& ContentFaviconDriver::GetFaviconStatus() {
+  DCHECK(web_contents()->GetController().GetActiveEntry());
+  return web_contents()->GetController().GetActiveEntry()->GetFavicon();
+}
+
+ContentFaviconDriver::ContentFaviconDriver(
+    content::WebContents* web_contents,
+    FaviconService* favicon_service,
+    history::HistoryService* history_service,
+    bookmarks::BookmarkModel* bookmark_model)
+    : content::WebContentsObserver(web_contents),
+      FaviconDriverImpl(favicon_service, history_service, bookmark_model) {
+}
+
+ContentFaviconDriver::~ContentFaviconDriver() {
+}
+
+void ContentFaviconDriver::NotifyFaviconUpdated(bool icon_url_changed) {
+  FaviconDriverImpl::NotifyFaviconUpdated(icon_url_changed);
+  web_contents()->NotifyNavigationStateChanged(content::INVALIDATE_TYPE_TAB);
+}
+
+void ContentFaviconDriver::DidUpdateFaviconURL(
+    const std::vector<content::FaviconURL>& candidates) {
+  DCHECK(!candidates.empty());
+  favicon_urls_ = candidates;
+  OnUpdateFaviconURL(FaviconURLsFromContentFaviconURLs(candidates));
+}
+
+void ContentFaviconDriver::DidStartNavigationToPendingEntry(
+    const GURL& url,
+    content::NavigationController::ReloadType reload_type) {
+  if (reload_type == content::NavigationController::NO_RELOAD ||
+      IsOffTheRecord())
+    return;
+
+  bypass_cache_page_url_ = url;
+  SetFaviconOutOfDateForPage(
+      url, reload_type == content::NavigationController::RELOAD_IGNORING_CACHE);
+}
+
+void ContentFaviconDriver::DidNavigateMainFrame(
+    const content::LoadCommittedDetails& details,
+    const content::FrameNavigateParams& params) {
+  favicon_urls_.clear();
+
+  // Wait till the user navigates to a new URL to start checking the cache
+  // again. The cache may be ignored for non-reload navigations (e.g.
+  // history.replace() in-page navigation). This is allowed to increase the
+  // likelihood that "reloading a page ignoring the cache" redownloads the
+  // favicon. In particular, a page may do an in-page navigation before
+  // FaviconHandler has the time to determine that the favicon needs to be
+  // redownloaded.
+  GURL url = details.entry->GetURL();
+  if (url != bypass_cache_page_url_)
+    bypass_cache_page_url_ = GURL();
+
+  // Get the favicon, either from history or request it from the net.
+  FetchFavicon(url);
+}
+
+}  // namespace favicon