| // Copyright 2013 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/extensions/favicon_downloader.h" |
| |
| #include "base/bind.h" |
| #include "chrome/browser/favicon/favicon_tab_helper.h" |
| #include "content/public/browser/web_contents.h" |
| #include "content/public/common/favicon_url.h" |
| #include "third_party/skia/include/core/SkBitmap.h" |
| #include "ui/gfx/size.h" |
| |
| FaviconDownloader::FaviconDownloader( |
| content::WebContents* web_contents, |
| const std::vector<GURL>& extra_favicon_urls, |
| FaviconDownloaderCallback callback) |
| : content::WebContentsObserver(web_contents), |
| got_favicon_urls_(false), |
| extra_favicon_urls_(extra_favicon_urls), |
| callback_(callback), |
| weak_ptr_factory_(this) { |
| } |
| |
| FaviconDownloader::~FaviconDownloader() { |
| } |
| |
| void FaviconDownloader::Start() { |
| FetchIcons(extra_favicon_urls_); |
| // If the candidates aren't loaded, icons will be fetched when |
| // DidUpdateFaviconURL() is called. |
| std::vector<content::FaviconURL> favicon_tab_helper_urls = |
| GetFaviconURLsFromWebContents(); |
| if (!favicon_tab_helper_urls.empty()) { |
| got_favicon_urls_ = true; |
| FetchIcons(favicon_tab_helper_urls); |
| } |
| } |
| |
| int FaviconDownloader::DownloadImage(const GURL& url) { |
| return web_contents()->DownloadImage( |
| url, |
| true, // is_favicon |
| 0, // no max size |
| base::Bind(&FaviconDownloader::DidDownloadFavicon, |
| weak_ptr_factory_.GetWeakPtr())); |
| } |
| |
| std::vector<content::FaviconURL> |
| FaviconDownloader::GetFaviconURLsFromWebContents() { |
| FaviconTabHelper* favicon_tab_helper = |
| web_contents() ? FaviconTabHelper::FromWebContents(web_contents()) : NULL; |
| // If favicon_urls() is empty, we are guaranteed that DidUpdateFaviconURLs has |
| // not yet been called for the current page's navigation. |
| return favicon_tab_helper ? favicon_tab_helper->favicon_urls() |
| : std::vector<content::FaviconURL>(); |
| } |
| |
| void FaviconDownloader::FetchIcons( |
| const std::vector<content::FaviconURL>& favicon_urls) { |
| std::vector<GURL> urls; |
| for (std::vector<content::FaviconURL>::const_iterator it = |
| favicon_urls.begin(); |
| it != favicon_urls.end(); ++it) { |
| if (it->icon_type != content::FaviconURL::INVALID_ICON) |
| urls.push_back(it->icon_url); |
| } |
| FetchIcons(urls); |
| } |
| |
| void FaviconDownloader::FetchIcons(const std::vector<GURL>& urls) { |
| // Download icons; put their download ids into |in_progress_requests_| and |
| // their urls into |processed_urls_|. |
| for (std::vector<GURL>::const_iterator it = urls.begin(); |
| it != urls.end(); ++it) { |
| // Only start the download if the url hasn't been processed before. |
| if (processed_urls_.insert(*it).second) |
| in_progress_requests_.insert(DownloadImage(*it)); |
| } |
| |
| // If no downloads were initiated, we can proceed directly to running the |
| // callback. |
| if (in_progress_requests_.empty() && got_favicon_urls_) |
| callback_.Run(true, favicon_map_); |
| } |
| |
| void FaviconDownloader::DidDownloadFavicon( |
| int id, |
| int http_status_code, |
| const GURL& image_url, |
| const std::vector<SkBitmap>& bitmaps, |
| const std::vector<gfx::Size>& original_bitmap_sizes) { |
| // Request may have been canceled by DidNavigateMainFrame(). |
| if (in_progress_requests_.erase(id) == 0) |
| return; |
| |
| favicon_map_[image_url] = bitmaps; |
| |
| // Once all requests have been resolved, perform post-download tasks. |
| if (in_progress_requests_.empty() && got_favicon_urls_) |
| callback_.Run(true, favicon_map_); |
| } |
| |
| // content::WebContentsObserver overrides: |
| void FaviconDownloader::DidNavigateMainFrame( |
| const content::LoadCommittedDetails& details, |
| const content::FrameNavigateParams& params) { |
| // Clear all pending requests. |
| in_progress_requests_.clear(); |
| favicon_map_.clear(); |
| callback_.Run(false, favicon_map_); |
| } |
| |
| void FaviconDownloader::DidUpdateFaviconURL( |
| const std::vector<content::FaviconURL>& candidates) { |
| // Only consider the first candidates we are given. This prevents pages that |
| // change their favicon from spamming us. |
| if (got_favicon_urls_) |
| return; |
| |
| got_favicon_urls_ = true; |
| FetchIcons(candidates); |
| } |