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      1 // Copyright 2014 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/ui/zoom/zoom_controller.h"
      6 
      7 #include "base/prefs/pref_service.h"
      8 #include "base/process/kill.h"
      9 #include "chrome/browser/profiles/profile.h"
     10 #include "chrome/browser/ui/browser.h"
     11 #include "chrome/browser/ui/tabs/tab_strip_model.h"
     12 #include "chrome/common/pref_names.h"
     13 #include "chrome/test/base/in_process_browser_test.h"
     14 #include "chrome/test/base/ui_test_utils.h"
     15 #include "content/public/browser/navigation_entry.h"
     16 #include "content/public/browser/render_process_host.h"
     17 #include "content/public/browser/render_view_host.h"
     18 #include "content/public/browser/web_contents.h"
     19 #include "content/public/common/page_type.h"
     20 #include "content/public/test/browser_test_utils.h"
     21 #include "testing/gmock/include/gmock/gmock.h"
     22 
     23 typedef InProcessBrowserTest ZoomControllerBrowserTest;
     24 
     25 bool operator==(const ZoomController::ZoomChangedEventData& lhs,
     26                 const ZoomController::ZoomChangedEventData& rhs) {
     27   return lhs.web_contents == rhs.web_contents &&
     28          lhs.old_zoom_level == rhs.old_zoom_level &&
     29          lhs.new_zoom_level == rhs.new_zoom_level &&
     30          lhs.zoom_mode == rhs.zoom_mode &&
     31          lhs.can_show_bubble == rhs.can_show_bubble;
     32 }
     33 
     34 class ZoomChangedWatcher : public ZoomObserver {
     35  public:
     36   ZoomChangedWatcher(
     37       content::WebContents* web_contents,
     38       const ZoomController::ZoomChangedEventData& expected_event_data)
     39       : web_contents_(web_contents),
     40         expected_event_data_(expected_event_data),
     41         message_loop_runner_(new content::MessageLoopRunner) {
     42     ZoomController::FromWebContents(web_contents)->AddObserver(this);
     43   }
     44   virtual ~ZoomChangedWatcher() {}
     45 
     46   void Wait() { message_loop_runner_->Run(); }
     47 
     48   virtual void OnZoomChanged(
     49       const ZoomController::ZoomChangedEventData& event_data) OVERRIDE {
     50     if (event_data == expected_event_data_)
     51       message_loop_runner_->Quit();
     52   }
     53 
     54  private:
     55   content::WebContents* web_contents_;
     56   ZoomController::ZoomChangedEventData expected_event_data_;
     57   scoped_refptr<content::MessageLoopRunner> message_loop_runner_;
     58 
     59   DISALLOW_COPY_AND_ASSIGN(ZoomChangedWatcher);
     60 };
     61 
     62 // TODO(wjmaclean): Enable this on Android when we can kill the process there.
     63 #if defined(OS_ANDROID)
     64 #define MAYBE_CrashedTabsDoNotChangeZoom DISABLED_CrashedTabsDoNotChangeZoom
     65 #else
     66 #define MAYBE_CrashedTabsDoNotChangeZoom CrashedTabsDoNotChangeZoom
     67 #endif
     68 IN_PROC_BROWSER_TEST_F(ZoomControllerBrowserTest,
     69                        MAYBE_CrashedTabsDoNotChangeZoom) {
     70   // At the start of the test we are at a tab displaying about:blank.
     71   content::WebContents* web_contents =
     72       browser()->tab_strip_model()->GetActiveWebContents();
     73 
     74   ZoomController* zoom_controller =
     75       ZoomController::FromWebContents(web_contents);
     76 
     77   double old_zoom_level = zoom_controller->GetZoomLevel();
     78   double new_zoom_level = old_zoom_level + 0.5;
     79 
     80   content::RenderProcessHost* host = web_contents->GetRenderProcessHost();
     81   {
     82     content::RenderProcessHostWatcher crash_observer(
     83         host, content::RenderProcessHostWatcher::WATCH_FOR_PROCESS_EXIT);
     84     base::KillProcess(host->GetHandle(), 0, false);
     85     crash_observer.Wait();
     86   }
     87   EXPECT_FALSE(web_contents->GetRenderViewHost()->IsRenderViewLive());
     88 
     89   // The following attempt to change the zoom level for a crashed tab should
     90   // fail.
     91   zoom_controller->SetZoomLevel(new_zoom_level);
     92   EXPECT_FLOAT_EQ(old_zoom_level, zoom_controller->GetZoomLevel());
     93 }
     94 
     95 IN_PROC_BROWSER_TEST_F(ZoomControllerBrowserTest, OnPreferenceChanged) {
     96   content::WebContents* web_contents =
     97       browser()->tab_strip_model()->GetActiveWebContents();
     98   double new_default_zoom_level = 1.0;
     99   // Since this page uses the default zoom level, the changes to the default
    100   // zoom level will change the zoom level for this web_contents.
    101   ZoomController::ZoomChangedEventData zoom_change_data(
    102       web_contents,
    103       new_default_zoom_level,
    104       new_default_zoom_level,
    105       ZoomController::ZOOM_MODE_DEFAULT,
    106       true);
    107   ZoomChangedWatcher zoom_change_watcher(web_contents, zoom_change_data);
    108   // TODO(wjmaclean): Convert this to call partition-specific zoom level prefs
    109   // when they become available.
    110   browser()->profile()->GetPrefs()->SetDouble(prefs::kDefaultZoomLevel,
    111                                               new_default_zoom_level);
    112   // Because this test relies on a round-trip IPC to/from the renderer process,
    113   // we need to wait for it to propagate.
    114   zoom_change_watcher.Wait();
    115 }
    116 
    117 IN_PROC_BROWSER_TEST_F(ZoomControllerBrowserTest, ErrorPagesDoNotZoom) {
    118   ui_test_utils::NavigateToURL(browser(), GURL("http://kjfhkjsdf.com"));
    119   content::WebContents* web_contents =
    120       browser()->tab_strip_model()->GetActiveWebContents();
    121 
    122   ZoomController* zoom_controller =
    123       ZoomController::FromWebContents(web_contents);
    124   EXPECT_EQ(
    125       content::PAGE_TYPE_ERROR,
    126       web_contents->GetController().GetLastCommittedEntry()->GetPageType());
    127 
    128   double old_zoom_level = zoom_controller->GetZoomLevel();
    129   double new_zoom_level = old_zoom_level + 0.5;
    130 
    131   // The following attempt to change the zoom level for an error page should
    132   // fail.
    133   zoom_controller->SetZoomLevel(new_zoom_level);
    134   EXPECT_FLOAT_EQ(old_zoom_level, zoom_controller->GetZoomLevel());
    135 }
    136