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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "chrome/browser/extensions/favicon_downloader.h" |
| 6 |
| 7 #include "base/bind.h" |
| 8 #include "chrome/browser/favicon/favicon_tab_helper.h" |
| 9 #include "content/public/browser/web_contents.h" |
| 10 #include "content/public/common/favicon_url.h" |
| 11 #include "third_party/skia/include/core/SkBitmap.h" |
| 12 #include "ui/gfx/size.h" |
| 13 |
| 14 FaviconDownloader::FaviconDownloader( |
| 15 content::WebContents* web_contents, |
| 16 const std::vector<GURL>& extra_favicon_urls, |
| 17 FaviconDownloaderCallback callback) |
| 18 : content::WebContentsObserver(web_contents), |
| 19 got_favicon_urls_(false), |
| 20 extra_favicon_urls_(extra_favicon_urls), |
| 21 callback_(callback), |
| 22 weak_ptr_factory_(this) { |
| 23 } |
| 24 |
| 25 FaviconDownloader::~FaviconDownloader() { |
| 26 } |
| 27 |
| 28 void FaviconDownloader::Start() { |
| 29 FetchIcons(extra_favicon_urls_); |
| 30 // If the candidates aren't loaded, icons will be fetched when |
| 31 // DidUpdateFaviconURL() is called. |
| 32 std::vector<content::FaviconURL> favicon_tab_helper_urls = |
| 33 GetFaviconURLsFromWebContents(); |
| 34 if (!favicon_tab_helper_urls.empty()) { |
| 35 got_favicon_urls_ = true; |
| 36 FetchIcons(favicon_tab_helper_urls); |
| 37 } |
| 38 } |
| 39 |
| 40 int FaviconDownloader::DownloadImage(const GURL& url) { |
| 41 return web_contents()->DownloadImage( |
| 42 url, |
| 43 true, // is_favicon |
| 44 0, // no max size |
| 45 base::Bind(&FaviconDownloader::DidDownloadFavicon, |
| 46 weak_ptr_factory_.GetWeakPtr())); |
| 47 } |
| 48 |
| 49 std::vector<content::FaviconURL> |
| 50 FaviconDownloader::GetFaviconURLsFromWebContents() { |
| 51 FaviconTabHelper* favicon_tab_helper = |
| 52 web_contents() ? FaviconTabHelper::FromWebContents(web_contents()) : NULL; |
| 53 // If favicon_urls() is empty, we are guaranteed that DidUpdateFaviconURLs has |
| 54 // not yet been called for the current page's navigation. |
| 55 return favicon_tab_helper ? favicon_tab_helper->favicon_urls() |
| 56 : std::vector<content::FaviconURL>(); |
| 57 } |
| 58 |
| 59 void FaviconDownloader::FetchIcons( |
| 60 const std::vector<content::FaviconURL>& favicon_urls) { |
| 61 std::vector<GURL> urls; |
| 62 for (std::vector<content::FaviconURL>::const_iterator it = |
| 63 favicon_urls.begin(); |
| 64 it != favicon_urls.end(); ++it) { |
| 65 if (it->icon_type != content::FaviconURL::INVALID_ICON) |
| 66 urls.push_back(it->icon_url); |
| 67 } |
| 68 FetchIcons(urls); |
| 69 } |
| 70 |
| 71 void FaviconDownloader::FetchIcons(const std::vector<GURL>& urls) { |
| 72 // Download icons; put their download ids into |in_progress_requests_| and |
| 73 // their urls into |processed_urls_|. |
| 74 for (std::vector<GURL>::const_iterator it = urls.begin(); |
| 75 it != urls.end(); ++it) { |
| 76 // Only start the download if the url hasn't been processed before. |
| 77 if (processed_urls_.insert(*it).second) |
| 78 in_progress_requests_.insert(DownloadImage(*it)); |
| 79 } |
| 80 |
| 81 // If no downloads were initiated, we can proceed directly to running the |
| 82 // callback. |
| 83 if (in_progress_requests_.empty() && got_favicon_urls_) |
| 84 callback_.Run(true, favicon_map_); |
| 85 } |
| 86 |
| 87 void FaviconDownloader::DidDownloadFavicon( |
| 88 int id, |
| 89 int http_status_code, |
| 90 const GURL& image_url, |
| 91 const std::vector<SkBitmap>& bitmaps, |
| 92 const std::vector<gfx::Size>& original_bitmap_sizes) { |
| 93 // Request may have been canceled by DidNavigateMainFrame(). |
| 94 if (in_progress_requests_.erase(id) == 0) |
| 95 return; |
| 96 |
| 97 favicon_map_[image_url] = bitmaps; |
| 98 |
| 99 // Once all requests have been resolved, perform post-download tasks. |
| 100 if (in_progress_requests_.empty() && got_favicon_urls_) |
| 101 callback_.Run(true, favicon_map_); |
| 102 } |
| 103 |
| 104 // content::WebContentsObserver overrides: |
| 105 void FaviconDownloader::DidNavigateMainFrame( |
| 106 const content::LoadCommittedDetails& details, |
| 107 const content::FrameNavigateParams& params) { |
| 108 // Clear all pending requests. |
| 109 in_progress_requests_.clear(); |
| 110 favicon_map_.clear(); |
| 111 callback_.Run(false, favicon_map_); |
| 112 } |
| 113 |
| 114 void FaviconDownloader::DidUpdateFaviconURL( |
| 115 int32 page_id, |
| 116 const std::vector<content::FaviconURL>& candidates) { |
| 117 // Only consider the first candidates we are given. This prevents pages that |
| 118 // change their favicon from spamming us. |
| 119 if (got_favicon_urls_) |
| 120 return; |
| 121 |
| 122 got_favicon_urls_ = true; |
| 123 FetchIcons(candidates); |
| 124 } |
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