chrome/browser/ui/find_bar/find_bar_controller.h

   1 // Copyright (c) 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_FIND_BAR_FIND_BAR_CONTROLLER_H_
   6 #define CHROME_BROWSER_UI_FIND_BAR_FIND_BAR_CONTROLLER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "content/public/browser/notification_observer.h"
  11 #include "content/public/browser/notification_registrar.h"
  12
  13 class FindBar;
  14
  15 namespace content {
  16 class WebContents;
  17 }
  18
  19 namespace gfx {
  20 class Rect;
  21 }
  22
  23 class FindBarController : public content::NotificationObserver {
  24  public:
  25   // An enum listing the possible actions to take on a find-in-page selection
  26   // in the page when ending the find session.
  27   enum SelectionAction {
  28     kKeepSelectionOnPage,     // Translate the find selection into a normal
  29                               // selection.
  30     kClearSelectionOnPage,    // Clear the find selection.
  31     kActivateSelectionOnPage  // Focus and click the selected node (for links).
  32   };
  33
  34   // An enum listing the possible actions to take on a find-in-page results in
  35   // the Find box when ending the find session.
  36   enum ResultAction {
  37     kClearResultsInFindBox,  // Clear search string, ordinal and match count.
  38     kKeepResultsInFindBox,   // Leave the results untouched.
  39   };
  40
  41   // FindBar takes ownership of |find_bar_view|.
  42   explicit FindBarController(FindBar* find_bar);
  43
  44   ~FindBarController() override;
  45
  46   // Shows the find bar. Any previous search string will again be visible.
  47   void Show();
  48
  49   // Ends the current session. |selection_action| specifies what to do with the
  50   // selection on the page created by the find operation. |results_action|
  51   // specifies what to do with the contents of the Find box (after ending).
  52   void EndFindSession(SelectionAction selection_action,
  53                       ResultAction results_action);
  54
  55   // Accessor for the attached WebContents.
  56   content::WebContents* web_contents() const { return web_contents_; }
  57
  58   // Changes the WebContents that this FindBar is attached to. This
  59   // occurs when the user switches tabs in the Browser window. |contents| can be
  60   // NULL.
  61   void ChangeWebContents(content::WebContents* contents);
  62
  63   // Overridden from content::NotificationObserver:
  64   void Observe(int type,
  65                const content::NotificationSource& source,
  66                const content::NotificationDetails& details) override;
  67
  68   FindBar* find_bar() const { return find_bar_.get(); }
  69
  70   // Reposition |view_location| such that it avoids |avoid_overlapping_rect|,
  71   // and return the new location.
  72   static gfx::Rect GetLocationForFindbarView(
  73       gfx::Rect view_location,
  74       const gfx::Rect& dialog_bounds,
  75       const gfx::Rect& avoid_overlapping_rect);
  76
  77  private:
  78   // Sents an update to the find bar with the tab contents' current result. The
  79   // web_contents_ must be non-NULL before this call. Theis handles
  80   // de-flickering in addition to just calling the update function.
  81   void UpdateFindBarForCurrentResult();
  82
  83   // For Windows and Linux this function sets the prepopulate text for the
  84   // Find text box. The propopulate value is the last value the user searched
  85   // for in the current tab, or (if blank) the last value searched for in any
  86   // tab. Mac has a global value for search, so this function does nothing on
  87   // Mac.
  88   void MaybeSetPrepopulateText();
  89
  90   content::NotificationRegistrar registrar_;
  91
  92   scoped_ptr<FindBar> find_bar_;
  93
  94   // The WebContents we are currently associated with.  Can be NULL.
  95   content::WebContents* web_contents_;
  96
  97   // The last match count we reported to the user. This is used by
  98   // UpdateFindBarForCurrentResult to avoid flickering.
  99   int last_reported_matchcount_;
 100
 101   DISALLOW_COPY_AND_ASSIGN(FindBarController);
 102 };
 103
 104 #endif  // CHROME_BROWSER_UI_FIND_BAR_FIND_BAR_CONTROLLER_H_