chrome/browser/task_management/providers/web_contents/prerender_task.cc

   1 // Copyright 2015 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/task_management/providers/web_contents/prerender_task.h"
   6
   7 #include "chrome/grit/generated_resources.h"
   8 #include "content/public/browser/web_contents.h"
   9 #include "grit/theme_resources.h"
  10 #include "ui/base/l10n/l10n_util.h"
  11 #include "ui/base/resource/resource_bundle.h"
  12 #include "ui/gfx/image/image_skia.h"
  13
  14 namespace task_management {
  15
  16 namespace {
  17
  18 gfx::ImageSkia* g_prerender_icon = nullptr;
  19
  20 // Returns the prerender icon or |nullptr| if the |ResourceBundle| is not ready
  21 // yet.
  22 gfx::ImageSkia* GetPrerenderIcon() {
  23   if (g_prerender_icon)
  24     return g_prerender_icon;
  25
  26   if (!ResourceBundle::HasSharedInstance())
  27     return nullptr;
  28
  29   g_prerender_icon =
  30       ResourceBundle::GetSharedInstance().GetImageSkiaNamed(IDR_PRERENDER);
  31   return g_prerender_icon;
  32 }
  33
  34 base::string16 PrefixTitle(const base::string16& title) {
  35   return l10n_util::GetStringFUTF16(IDS_TASK_MANAGER_PRERENDER_PREFIX, title);
  36 }
  37
  38 }  // namespace
  39
  40 PrerenderTask::PrerenderTask(content::WebContents* web_contents)
  41     : RendererTask(
  42           PrefixTitle(RendererTask::GetTitleFromWebContents(web_contents)),
  43           GetPrerenderIcon(),
  44           web_contents,
  45           web_contents->GetRenderProcessHost()) {
  46 }
  47
  48 PrerenderTask::~PrerenderTask() {
  49 }
  50
  51 void PrerenderTask::OnTitleChanged(content::NavigationEntry* entry) {
  52   // As long as this task lives we keep prefixing its title with "Prerender:".
  53   set_title(PrefixTitle(RendererTask::GetTitleFromWebContents(web_contents())));
  54 }
  55
  56 void PrerenderTask::OnFaviconChanged() {
  57   // As long as this task lives we keep using the prerender icon, so we ignore
  58   // this event.
  59 }
  60
  61 }  // namespace task_management