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
  15 using content::BrowserThread;
  16 using content::WebContents;
  17
  18 namespace android_webview {
  19
  20 IconHelper::IconHelper(WebContents* web_contents)
  21     : WebContentsObserver(web_contents),
  22       listener_(NULL) {
  23 }
  24
  25 IconHelper::~IconHelper() {
  26 }
  27
  28 void IconHelper::SetListener(Listener* listener) {
  29   listener_ = listener;
  30 }
  31
  32 void IconHelper::DownloadFaviconCallback(
  33   int id, const GURL& image_url, int requested_size,
  34   const std::vector<SkBitmap>& bitmaps) {
  35   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  36   if (bitmaps.size() == 0) {
  37     return;
  38   }
  39
  40   // We can protentially have multiple frames of the icon
  41   // in different sizes. We need more fine grain API spec
  42   // to let clients pick out the frame they want.
  43
  44   // TODO(acleung): Pick the best icon to return based on size.
  45   if (listener_)
  46     listener_->OnReceivedIcon(bitmaps[0]);
  47 }
  48
  49 void IconHelper::DidUpdateFaviconURL(int32 page_id,
  50     const std::vector<content::FaviconURL>& candidates) {
  51   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  52   for (std::vector<content::FaviconURL>::const_iterator i = candidates.begin();
  53        i != candidates.end(); ++i) {
  54     if (!i->icon_url.is_valid())
  55       continue;
  56
  57     switch(i->icon_type) {
  58       case content::FaviconURL::FAVICON:
  59         // TODO(acleung): only fetch the URL if favicon downloading is enabled.
  60         // (currently that is, the app has called WebIconDatabase.open()
  61         // but we should decouple that setting via a boolean setting)
  62         web_contents()->DownloadImage(i->icon_url,
  63             true,
  64             0,
  65             base::Bind(
  66                 &IconHelper::DownloadFaviconCallback, base::Unretained(this)));
  67         break;
  68       case content::FaviconURL::TOUCH_ICON:
  69         if (listener_)
  70           listener_->OnReceivedTouchIconUrl(i->icon_url.spec(), false);
  71         break;
  72       case content::FaviconURL::TOUCH_PRECOMPOSED_ICON:
  73         if (listener_)
  74           listener_->OnReceivedTouchIconUrl(i->icon_url.spec(), true);
  75         break;
  76       case content::FaviconURL::INVALID_ICON:
  77         // Silently ignore it. Only trigger a callback on valid icons.
  78         break;
  79       default:
  80         NOTREACHED();
  81         break;
  82     }
  83   }
  84 }
  85
  86 }  // namespace android_webview