chrome/browser/ui/views/find_bar_view.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_VIEWS_FIND_BAR_VIEW_H_
   6 #define CHROME_BROWSER_UI_VIEWS_FIND_BAR_VIEW_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/strings/string16.h"
  11 #include "chrome/browser/ui/views/dropdown_bar_view.h"
  12 #include "ui/views/controls/button/button.h"
  13 #include "ui/views/controls/textfield/textfield.h"
  14 #include "ui/views/controls/textfield/textfield_controller.h"
  15
  16 class FindBarHost;
  17 class FindNotificationDetails;
  18
  19 namespace views {
  20 class ImageButton;
  21 class Label;
  22 class MouseEvent;
  23 class Painter;
  24 }
  25
  26 ////////////////////////////////////////////////////////////////////////////////
  27 //
  28 // The FindBarView is responsible for drawing the UI controls of the
  29 // FindBar, the find text box, the 'Find' button and the 'Close'
  30 // button. It communicates the user search words to the FindBarHost.
  31 //
  32 ////////////////////////////////////////////////////////////////////////////////
  33 class FindBarView : public DropdownBarView,
  34                     public views::ButtonListener,
  35                     public views::TextfieldController {
  36  public:
  37   // A tag denoting which button the user pressed.
  38   enum ButtonTag {
  39     FIND_PREVIOUS_TAG = 0,  // The Find Previous button.
  40     FIND_NEXT_TAG,          // The Find Next button.
  41     CLOSE_TAG,              // The Close button (the 'X').
  42   };
  43
  44   explicit FindBarView(FindBarHost* host);
  45   ~FindBarView() override;
  46
  47   // Accessors for the text and selection displayed in the text box.
  48   void SetFindTextAndSelectedRange(const base::string16& find_text,
  49                                    const gfx::Range& selected_range);
  50   base::string16 GetFindText() const;
  51   gfx::Range GetSelectedRange() const;
  52
  53   // Gets the selected text in the text box.
  54   base::string16 GetFindSelectedText() const;
  55
  56   // Gets the match count text displayed in the text box.
  57   base::string16 GetMatchCountText() const;
  58
  59   // Updates the label inside the Find text box that shows the ordinal of the
  60   // active item and how many matches were found.
  61   void UpdateForResult(const FindNotificationDetails& result,
  62                        const base::string16& find_text);
  63
  64   // Clears the current Match Count value in the Find text box.
  65   void ClearMatchCount();
  66
  67   // Claims focus for the text field and selects its contents.
  68   void SetFocusAndSelection(bool select_all) override;
  69
  70   // DropdownBarView:
  71   void OnPaint(gfx::Canvas* canvas) override;
  72   void Layout() override;
  73   gfx::Size GetPreferredSize() const override;
  74
  75   // views::ButtonListener:
  76   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
  77
  78   // views::TextfieldController:
  79   bool HandleKeyEvent(views::Textfield* sender,
  80                       const ui::KeyEvent& key_event) override;
  81   void OnAfterUserAction(views::Textfield* sender) override;
  82   void OnAfterPaste() override;
  83
  84  private:
  85   // Starts finding |search_text|.  If the text is empty, stops finding.
  86   void Find(const base::string16& search_text);
  87
  88   // Updates the appearance for the match count label.
  89   void UpdateMatchCountAppearance(bool no_match);
  90
  91   // DropdownBarView:
  92   const char* GetClassName() const override;
  93   void OnThemeChanged() override;
  94
  95   // We use a hidden view to grab mouse clicks and bring focus to the find
  96   // text box. This is because although the find text box may look like it
  97   // extends all the way to the find button, it only goes as far as to the
  98   // match_count label. The user, however, expects being able to click anywhere
  99   // inside what looks like the find text box (including on or around the
 100   // match_count label) and have focus brought to the find box.
 101   class FocusForwarderView : public views::View {
 102    public:
 103     explicit FocusForwarderView(
 104         views::Textfield* view_to_focus_on_mousedown)
 105       : view_to_focus_on_mousedown_(view_to_focus_on_mousedown) {}
 106
 107    private:
 108     bool OnMousePressed(const ui::MouseEvent& event) override;
 109
 110     views::Textfield* view_to_focus_on_mousedown_;
 111
 112     DISALLOW_COPY_AND_ASSIGN(FocusForwarderView);
 113   };
 114
 115   // Returns the OS-specific view for the find bar that acts as an intermediary
 116   // between us and the WebContentsView.
 117   FindBarHost* find_bar_host() const;
 118
 119   // Used to detect if the input text, not including the IME composition text,
 120   // has changed or not.
 121   base::string16 last_searched_text_;
 122
 123   // The controls in the window.
 124   views::Textfield* find_text_;
 125   scoped_ptr<views::Painter> find_text_border_;
 126   views::Label* match_count_text_;
 127   FocusForwarderView* focus_forwarder_view_;
 128   views::ImageButton* find_previous_button_;
 129   views::ImageButton* find_next_button_;
 130   views::ImageButton* close_button_;
 131
 132   // The preferred height of the find bar.
 133   int preferred_height_;
 134
 135   DISALLOW_COPY_AND_ASSIGN(FindBarView);
 136 };
 137
 138 #endif  // CHROME_BROWSER_UI_VIEWS_FIND_BAR_VIEW_H_