android_webview/browser/icon_helper.cc

   1 // Copyright (c) 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 "android_webview/browser/icon_helper.h"
   6
   7 #include "base/bind.h"
   8 #include "base/callback.h"
   9 #include "base/logging.h"
  10 #include "content/public/browser/browser_thread.h"
  11 #include "content/public/browser/web_contents.h"
  12 #include "content/public/common/favicon_url.h"
  13 #include "third_party/skia/include/core/SkBitmap.h"
  14 #include "ui/gfx/size.h"
  15
  16 using content::BrowserThread;
  17 using content::WebContents;
  18
  19 namespace android_webview {
  20
  21 IconHelper::IconHelper(WebContents* web_contents)
  22     : WebContentsObserver(web_contents),
  23       listener_(NULL) {
  24 }
  25
  26 IconHelper::~IconHelper() {
  27 }
  28
  29 void IconHelper::SetListener(Listener* listener) {
  30   listener_ = listener;
  31 }
  32
  33 void IconHelper::DownloadFaviconCallback(
  34     int id,
  35     int http_status_code,
  36     const GURL& image_url,
  37     const std::vector<SkBitmap>& bitmaps,
  38     const std::vector<gfx::Size>& original_bitmap_sizes) {
  39   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  40   if (bitmaps.size() == 0) {
  41     return;
  42   }
  43
  44   // We can protentially have multiple frames of the icon
  45   // in different sizes. We need more fine grain API spec
  46   // to let clients pick out the frame they want.
  47
  48   // TODO(acleung): Pick the best icon to return based on size.
  49   if (listener_)
  50     listener_->OnReceivedIcon(image_url, bitmaps[0]);
  51 }
  52
  53 void IconHelper::DidUpdateFaviconURL(int32 page_id,
  54     const std::vector<content::FaviconURL>& candidates) {
  55   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  56   for (std::vector<content::FaviconURL>::const_iterator i = candidates.begin();
  57        i != candidates.end(); ++i) {
  58     if (!i->icon_url.is_valid())
  59       continue;
  60
  61     switch(i->icon_type) {
  62       case content::FaviconURL::FAVICON:
  63         if (listener_ && !listener_->ShouldDownloadFavicon(i->icon_url)) break;
  64         web_contents()->DownloadImage(i->icon_url,
  65             true,  // Is a favicon
  66             0,  // No maximum size
  67             base::Bind(
  68                 &IconHelper::DownloadFaviconCallback, base::Unretained(this)));
  69         break;
  70       case content::FaviconURL::TOUCH_ICON:
  71         if (listener_)
  72           listener_->OnReceivedTouchIconUrl(i->icon_url.spec(), false);
  73         break;
  74       case content::FaviconURL::TOUCH_PRECOMPOSED_ICON:
  75         if (listener_)
  76           listener_->OnReceivedTouchIconUrl(i->icon_url.spec(), true);
  77         break;
  78       case content::FaviconURL::INVALID_ICON:
  79         // Silently ignore it. Only trigger a callback on valid icons.
  80         break;
  81       default:
  82         NOTREACHED();
  83         break;
  84     }
  85   }
  86 }
  87
  88 }  // namespace android_webview