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.
5 #ifndef CHROME_BROWSER_UI_VIEWS_FIND_BAR_HOST_H_
6 #define CHROME_BROWSER_UI_VIEWS_FIND_BAR_HOST_H_
8 #include "base/compiler_specific.h"
9 #include "chrome/browser/ui/find_bar/find_bar.h"
10 #include "chrome/browser/ui/views/dropdown_bar_host.h"
11 #include "chrome/browser/ui/views/find_bar_view.h"
12 #include "ui/gfx/native_widget_types.h"
13 #include "ui/gfx/rect.h"
14 #include "ui/views/controls/textfield/textfield.h"
17 class FindBarController;
18 class FindNotificationDetails;
20 ////////////////////////////////////////////////////////////////////////////////
22 // The FindBarHost implements the container widget for the
23 // find-in-page functionality. It uses the appropriate implementation from
24 // find_bar_host_win.cc or find_bar_host_aura.cc to draw its content and is
25 // responsible for showing, hiding, closing, and moving the widget if needed,
26 // for example if the widget is obscuring the selection results. It also
27 // receives notifications about the search results and communicates that to
30 // There is one FindBarHost per BrowserView, and its state is updated
31 // whenever the selected Tab is changed. The FindBarHost is created when
32 // the BrowserView is attached to the frame's Widget for the first time.
34 ////////////////////////////////////////////////////////////////////////////////
35 class FindBarHost : public DropdownBarHost,
37 public FindBarTesting {
39 explicit FindBarHost(BrowserView* browser_view);
40 virtual ~FindBarHost();
42 // Forwards selected key events to the renderer. This is useful to make sure
43 // that arrow keys and PageUp and PageDown result in scrolling, instead of
44 // being eaten because the FindBar has focus. Returns true if the keystroke
45 // was forwarded, false if not.
46 bool MaybeForwardKeyEventToWebpage(const ui::KeyEvent& key_event);
48 // FindBar implementation:
49 virtual FindBarController* GetFindBarController() const OVERRIDE;
50 virtual void SetFindBarController(
51 FindBarController* find_bar_controller) OVERRIDE;
52 virtual void Show(bool animate) OVERRIDE;
53 virtual void Hide(bool animate) OVERRIDE;
54 virtual void SetFocusAndSelection() OVERRIDE;
55 virtual void ClearResults(const FindNotificationDetails& results) OVERRIDE;
56 virtual void StopAnimation() OVERRIDE;
57 virtual void MoveWindowIfNecessary(const gfx::Rect& selection_rect,
58 bool no_redraw) OVERRIDE;
59 virtual void SetFindTextAndSelectedRange(
60 const string16& find_text,
61 const gfx::Range& selected_range) OVERRIDE;
62 virtual string16 GetFindText() OVERRIDE;
63 virtual gfx::Range GetSelectedRange() OVERRIDE;
64 virtual void UpdateUIForFindResult(const FindNotificationDetails& result,
65 const string16& find_text) OVERRIDE;
66 virtual void AudibleAlert() OVERRIDE;
67 virtual bool IsFindBarVisible() OVERRIDE;
68 virtual void RestoreSavedFocus() OVERRIDE;
69 virtual bool HasGlobalFindPasteboard() OVERRIDE;
70 virtual void UpdateFindBarForChangedWebContents() OVERRIDE;
71 virtual FindBarTesting* GetFindBarTesting() OVERRIDE;
73 // Overridden from ui::AcceleratorTarget in DropdownBarHost class:
74 virtual bool AcceleratorPressed(const ui::Accelerator& accelerator) OVERRIDE;
75 virtual bool CanHandleAccelerators() const OVERRIDE;
77 // FindBarTesting implementation:
78 virtual bool GetFindBarWindowInfo(gfx::Point* position,
79 bool* fully_visible) OVERRIDE;
80 virtual string16 GetFindSelectedText() OVERRIDE;
81 virtual string16 GetMatchCountText() OVERRIDE;
82 virtual int GetWidth() OVERRIDE;
84 // Overridden from DropdownBarHost:
85 // Returns the rectangle representing where to position the find bar. It uses
86 // GetDialogBounds and positions itself within that, either to the left (if an
87 // InfoBar is present) or to the right (no InfoBar). If
88 // |avoid_overlapping_rect| is specified, the return value will be a rectangle
89 // located immediately to the left of |avoid_overlapping_rect|, as long as
90 // there is enough room for the dialog to draw within the bounds. If not, the
91 // dialog position returned will overlap |avoid_overlapping_rect|.
92 // Note: |avoid_overlapping_rect| is expected to use coordinates relative to
93 // the top of the page area, (it will be converted to coordinates relative to
94 // the top of the browser window, when comparing against the dialog
95 // coordinates). The returned value is relative to the browser window.
96 virtual gfx::Rect GetDialogPosition(
97 gfx::Rect avoid_overlapping_rect) OVERRIDE;
98 // Moves the dialog window to the provided location, moves it to top in the
99 // z-order (HWND_TOP, not HWND_TOPMOST) and shows the window (if hidden).
100 // It then calls UpdateWindowEdges to make sure we don't overwrite the Chrome
101 // window border. If |no_redraw| is set, the window is getting moved but not
102 // sized, and should not be redrawn to reduce update flicker.
103 virtual void SetDialogPosition(const gfx::Rect& new_pos,
104 bool no_redraw) OVERRIDE;
106 // Retrieves the boundaries that the find bar widget has to work with
107 // within the Chrome frame window. The resulting rectangle will be a
108 // rectangle that overlaps the bottom of the Chrome toolbar by one
109 // pixel (so we can create the illusion that the dropdown widget is
110 // part of the toolbar) and covers the page area, except that we
111 // deflate the rect width by subtracting (from both sides) the width
112 // of the toolbar and some extra pixels to account for the width of
113 // the Chrome window borders. |bounds| is relative to the browser
114 // window. If the function fails to determine the browser
115 // window/client area rectangle or the rectangle for the page area
116 // then |bounds| will be an empty rectangle.
117 virtual void GetWidgetBounds(gfx::Rect* bounds) OVERRIDE;
119 // Additional accelerator handling (on top of what DropDownBarHost does).
120 virtual void RegisterAccelerators() OVERRIDE;
121 virtual void UnregisterAccelerators() OVERRIDE;
124 // Overridden from DropdownBarHost:
125 virtual void OnVisibilityChanged() OVERRIDE;
128 // Allows implementation to tweak widget position.
129 void GetWidgetPositionNative(gfx::Rect* avoid_overlapping_rect);
131 // Allows native implementation to prevent key events from being forwarded.
132 bool ShouldForwardKeyEventToWebpageNative(const ui::KeyEvent& key_event);
134 // Returns the FindBarView.
135 FindBarView* find_bar_view() { return static_cast<FindBarView*>(view()); }
137 // A pointer back to the owning controller.
138 FindBarController* find_bar_controller_;
140 DISALLOW_COPY_AND_ASSIGN(FindBarHost);
143 #endif // CHROME_BROWSER_UI_VIEWS_FIND_BAR_HOST_H_