chrome/browser/ui/search/instant_controller.h

   1 // Copyright 2012 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 #ifndef CHROME_BROWSER_UI_SEARCH_INSTANT_CONTROLLER_H_
   6 #define CHROME_BROWSER_UI_SEARCH_INSTANT_CONTROLLER_H_
   7
   8 #include <list>
   9 #include <string>
  10 #include <utility>
  11 #include <vector>
  12
  13 #include "base/basictypes.h"
  14 #include "base/gtest_prod_util.h"
  15 #include "base/memory/scoped_ptr.h"
  16 #include "base/strings/string16.h"
  17 #include "chrome/browser/ui/search/instant_page.h"
  18 #include "chrome/common/search_types.h"
  19 #include "ui/gfx/native_widget_types.h"
  20
  21 class BrowserInstantController;
  22 class GURL;
  23 class InstantService;
  24 class InstantTab;
  25 class Profile;
  26
  27 namespace content {
  28 class WebContents;
  29 }
  30
  31 // Macro used for logging debug events. |message| should be a std::string.
  32 #define LOG_INSTANT_DEBUG_EVENT(controller, message) \
  33     controller->LogDebugEvent(message)
  34
  35 // InstantController drives Chrome Instant, i.e., the browser implementation of
  36 // the Embedded Search API (see http://dev.chromium.org/embeddedsearch).
  37 //
  38 // In extended mode, InstantController maintains and coordinates an InstantTab
  39 // instance of InstantPage. An InstantTab instance points to the currently
  40 // active tab, if it supports the Embedded Search API. InstantTab is backed by a
  41 // WebContents and it does not own that WebContents.
  42 //
  43 // InstantController is owned by Browser via BrowserInstantController.
  44 class InstantController : public InstantPage::Delegate {
  45  public:
  46   explicit InstantController(BrowserInstantController* browser);
  47   virtual ~InstantController();
  48
  49   // Called if the browser is navigating to a search URL for |search_terms| with
  50   // search-term-replacement enabled. If |instant_tab_| can be used to process
  51   // the search, this does so and returns true. Else, returns false.
  52   bool SubmitQuery(const base::string16& search_terms);
  53
  54   // The search mode in the active tab has changed. Bind |instant_tab_| if the
  55   // |new_mode| reflects an Instant search results page.
  56   void SearchModeChanged(const SearchMode& old_mode,
  57                          const SearchMode& new_mode);
  58
  59   // The user switched tabs. Bind |instant_tab_| if the newly active tab is an
  60   // Instant search results page.
  61   void ActiveTabChanged();
  62
  63   // The user is about to switch tabs.
  64   void TabDeactivated(content::WebContents* contents);
  65
  66   // Adds a new event to |debug_events_| and also DVLOG's it. Ensures that
  67   // |debug_events_| doesn't get too large.
  68   void LogDebugEvent(const std::string& info) const;
  69
  70   // Resets list of debug events.
  71   void ClearDebugEvents();
  72
  73   // See comments for |debug_events_| below.
  74   const std::list<std::pair<int64, std::string> >& debug_events() {
  75     return debug_events_;
  76   }
  77
  78   // Used by BrowserInstantController to notify InstantController about the
  79   // instant support change event for the active web contents.
  80   void InstantSupportChanged(InstantSupportState instant_support);
  81
  82  protected:
  83   // Accessors are made protected for testing purposes.
  84   virtual InstantTab* instant_tab() const;
  85
  86   virtual Profile* profile() const;
  87
  88  private:
  89   friend class InstantExtendedManualTest;
  90   friend class InstantTestBase;
  91
  92   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest, ExtendedModeIsOn);
  93   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest, MostVisited);
  94   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest, ProcessIsolation);
  95   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest, UnrelatedSiteInstance);
  96   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest, OnDefaultSearchProviderChanged);
  97   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest,
  98                            AcceptingURLSearchDoesNotNavigate);
  99   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest, AcceptingJSSearchDoesNotRunJS);
 100   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest,
 101                            ReloadSearchAfterBackReloadsCorrectQuery);
 102   FRIEND_TEST_ALL_PREFIXES(InstantExtendedFirstTabTest,
 103                            RedirectToLocalOnLoadFailure);
 104   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest, KeyboardTogglesVoiceSearch);
 105   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest, HomeButtonAffectsMargin);
 106   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest, SearchReusesInstantTab);
 107   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest,
 108                            SearchDoesntReuseInstantTabWithoutSupport);
 109   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest,
 110                            TypedSearchURLDoesntReuseInstantTab);
 111   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest,
 112                            DispatchMVChangeEventWhileNavigatingBackToNTP);
 113
 114   // Overridden from InstantPage::Delegate:
 115   // TODO(shishir): We assume that the WebContent's current RenderViewHost is
 116   // the RenderViewHost being created which is not always true. Fix this.
 117   virtual void InstantSupportDetermined(
 118       const content::WebContents* contents,
 119       bool supports_instant) OVERRIDE;
 120   virtual void InstantPageAboutToNavigateMainFrame(
 121       const content::WebContents* contents,
 122       const GURL& url) OVERRIDE;
 123
 124   // Helper function to navigate the given contents to the local fallback
 125   // Instant URL and trim the history correctly.
 126   void RedirectToLocalNTP(content::WebContents* contents);
 127
 128   // Helper for OmniboxFocusChanged. Commit or discard the overlay.
 129   void OmniboxLostFocus(gfx::NativeView view_gaining_focus);
 130
 131   // If the active tab is an Instant search results page, sets |instant_tab_| to
 132   // point to it. Else, deletes any existing |instant_tab_|.
 133   void ResetInstantTab();
 134
 135   // Sends theme info, omnibox bounds, etc. down to the Instant tab.
 136   void UpdateInfoForInstantTab();
 137
 138   // Returns the InstantService for the browser profile.
 139   InstantService* GetInstantService() const;
 140
 141   BrowserInstantController* const browser_;
 142
 143   // The instance of InstantPage maintained by InstantController.
 144   scoped_ptr<InstantTab> instant_tab_;
 145
 146   // The search model mode for the active tab.
 147   SearchMode search_mode_;
 148
 149   // List of events and their timestamps, useful in debugging Instant behaviour.
 150   mutable std::list<std::pair<int64, std::string> > debug_events_;
 151
 152   DISALLOW_COPY_AND_ASSIGN(InstantController);
 153 };
 154
 155 #endif  // CHROME_BROWSER_UI_SEARCH_INSTANT_CONTROLLER_H_