Home | History | Annotate | Download | only in find_bar 
      1 // Copyright (c) 2011 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 #pragma once
      8 
      9 #include "base/basictypes.h"
     10 #include "base/memory/scoped_ptr.h"
     11 #include "content/common/notification_observer.h"
     12 #include "content/common/notification_registrar.h"
     13 
     14 namespace gfx {
     15 class Rect;
     16 }
     17 
     18 class FindBar;
     19 class TabContentsWrapper;
     20 
     21 class FindBarController : public NotificationObserver {
     22  public:
     23   // An enum listing the possible actions to take on a find-in-page selection.
     24   enum SelectionAction {
     25     kKeepSelection,  // Translate the find selection into a normal selection.
     26     kClearSelection,  // Clear the find selection.
     27     kActivateSelection  // Focus and click the selected node (for links).
     28   };
     29 
     30   // FindBar takes ownership of |find_bar_view|.
     31   explicit FindBarController(FindBar* find_bar);
     32 
     33   virtual ~FindBarController();
     34 
     35   // Shows the find bar. Any previous search string will again be visible.
     36   void Show();
     37 
     38   // Ends the current session.
     39   void EndFindSession(SelectionAction action);
     40 
     41   // Accessor for the attached TabContentsWrapper.
     42   TabContentsWrapper* tab_contents() const { return tab_contents_; }
     43 
     44   // Changes the TabContents that this FindBar is attached to. This occurs when
     45   // the user switches tabs in the Browser window. |contents| can be NULL.
     46   void ChangeTabContents(TabContentsWrapper* contents);
     47 
     48   // Overridden from NotificationObserver:
     49   virtual void Observe(NotificationType type,
     50                        const NotificationSource& source,
     51                        const NotificationDetails& details);
     52 
     53   FindBar* find_bar() const { return find_bar_.get(); }
     54 
     55   // Reposition |view_location| such that it avoids |avoid_overlapping_rect|,
     56   // and return the new location.
     57   static gfx::Rect GetLocationForFindbarView(
     58       gfx::Rect view_location,
     59       const gfx::Rect& dialog_bounds,
     60       const gfx::Rect& avoid_overlapping_rect);
     61 
     62  private:
     63   // Sents an update to the find bar with the tab contents' current result. The
     64   // tab_contents_ must be non-NULL before this call. Theis handles
     65   // de-flickering in addition to just calling the update function.
     66   void UpdateFindBarForCurrentResult();
     67 
     68   // For Windows and Linux this function sets the prepopulate text for the
     69   // Find text box. The propopulate value is the last value the user searched
     70   // for in the current tab, or (if blank) the last value searched for in any
     71   // tab. Mac has a global value for search, so this function does nothing on
     72   // Mac.
     73   void MaybeSetPrepopulateText();
     74 
     75   NotificationRegistrar registrar_;
     76 
     77   scoped_ptr<FindBar> find_bar_;
     78 
     79   // The TabContentsWrapper we are currently associated with.  Can be NULL.
     80   TabContentsWrapper* tab_contents_;
     81 
     82   // The last match count we reported to the user. This is used by
     83   // UpdateFindBarForCurrentResult to avoid flickering.
     84   int last_reported_matchcount_;
     85 
     86   DISALLOW_COPY_AND_ASSIGN(FindBarController);
     87 };
     88 
     89 #endif  // CHROME_BROWSER_UI_FIND_BAR_FIND_BAR_CONTROLLER_H_
     90