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_HOST_H_ 6 #define CHROME_BROWSER_UI_VIEWS_FIND_BAR_HOST_H_ 7 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" 15 16 class BrowserView; 17 class FindBarController; 18 class FindNotificationDetails; 19 20 //////////////////////////////////////////////////////////////////////////////// 21 // 22 // The FindBarHost implements the container widget for the 23 // find-in-page functionality. It uses the implementation from 24 // find_bar_host_aura.cc to draw its content and is responsible for showing, 25 // hiding, closing, and moving the widget if needed, for example if the widget 26 // is obscuring the selection results. It also receives notifications about the 27 // search results and communicates that to the view. 28 // 29 // There is one FindBarHost per BrowserView, and its state is updated 30 // whenever the selected Tab is changed. The FindBarHost is created when 31 // the BrowserView is attached to the frame's Widget for the first time. 32 // 33 //////////////////////////////////////////////////////////////////////////////// 34 class FindBarHost : public DropdownBarHost, 35 public FindBar, 36 public FindBarTesting { 37 public: 38 explicit FindBarHost(BrowserView* browser_view); 39 virtual ~FindBarHost(); 40 41 // Forwards selected key events to the renderer. This is useful to make sure 42 // that arrow keys and PageUp and PageDown result in scrolling, instead of 43 // being eaten because the FindBar has focus. Returns true if the keystroke 44 // was forwarded, false if not. 45 bool MaybeForwardKeyEventToWebpage(const ui::KeyEvent& key_event); 46 47 // FindBar implementation: 48 virtual FindBarController* GetFindBarController() const OVERRIDE; 49 virtual void SetFindBarController( 50 FindBarController* find_bar_controller) OVERRIDE; 51 virtual void Show(bool animate) OVERRIDE; 52 virtual void Hide(bool animate) OVERRIDE; 53 virtual void SetFocusAndSelection() OVERRIDE; 54 virtual void ClearResults(const FindNotificationDetails& results) OVERRIDE; 55 virtual void StopAnimation() OVERRIDE; 56 virtual void MoveWindowIfNecessary(const gfx::Rect& selection_rect, 57 bool no_redraw) OVERRIDE; 58 virtual void SetFindTextAndSelectedRange( 59 const base::string16& find_text, 60 const gfx::Range& selected_range) OVERRIDE; 61 virtual base::string16 GetFindText() OVERRIDE; 62 virtual gfx::Range GetSelectedRange() OVERRIDE; 63 virtual void UpdateUIForFindResult(const FindNotificationDetails& result, 64 const base::string16& find_text) OVERRIDE; 65 virtual void AudibleAlert() OVERRIDE; 66 virtual bool IsFindBarVisible() OVERRIDE; 67 virtual void RestoreSavedFocus() OVERRIDE; 68 virtual bool HasGlobalFindPasteboard() OVERRIDE; 69 virtual void UpdateFindBarForChangedWebContents() OVERRIDE; 70 virtual FindBarTesting* GetFindBarTesting() OVERRIDE; 71 72 // Overridden from ui::AcceleratorTarget in DropdownBarHost class: 73 virtual bool AcceleratorPressed(const ui::Accelerator& accelerator) OVERRIDE; 74 virtual bool CanHandleAccelerators() const OVERRIDE; 75 76 // FindBarTesting implementation: 77 virtual bool GetFindBarWindowInfo(gfx::Point* position, 78 bool* fully_visible) OVERRIDE; 79 virtual base::string16 GetFindSelectedText() OVERRIDE; 80 virtual base::string16 GetMatchCountText() OVERRIDE; 81 virtual int GetWidth() OVERRIDE; 82 83 // Overridden from DropdownBarHost: 84 // Returns the rectangle representing where to position the find bar. It uses 85 // GetDialogBounds and positions itself within that, either to the left (if an 86 // InfoBar is present) or to the right (no InfoBar). If 87 // |avoid_overlapping_rect| is specified, the return value will be a rectangle 88 // located immediately to the left of |avoid_overlapping_rect|, as long as 89 // there is enough room for the dialog to draw within the bounds. If not, the 90 // dialog position returned will overlap |avoid_overlapping_rect|. 91 // Note: |avoid_overlapping_rect| is expected to use coordinates relative to 92 // the top of the page area, (it will be converted to coordinates relative to 93 // the top of the browser window, when comparing against the dialog 94 // coordinates). The returned value is relative to the browser window. 95 virtual gfx::Rect GetDialogPosition( 96 gfx::Rect avoid_overlapping_rect) OVERRIDE; 97 // Moves the dialog window to the provided location, moves it to top in the 98 // z-order (HWND_TOP, not HWND_TOPMOST) and shows the window (if hidden). 99 // It then calls UpdateWindowEdges to make sure we don't overwrite the Chrome 100 // window border. If |no_redraw| is set, the window is getting moved but not 101 // sized, and should not be redrawn to reduce update flicker. 102 virtual void SetDialogPosition(const gfx::Rect& new_pos, 103 bool no_redraw) OVERRIDE; 104 105 // Retrieves the boundaries that the find bar widget has to work with 106 // within the Chrome frame window. The resulting rectangle will be a 107 // rectangle that overlaps the bottom of the Chrome toolbar by one 108 // pixel (so we can create the illusion that the dropdown widget is 109 // part of the toolbar) and covers the page area, except that we 110 // deflate the rect width by subtracting (from both sides) the width 111 // of the toolbar and some extra pixels to account for the width of 112 // the Chrome window borders. |bounds| is relative to the browser 113 // window. If the function fails to determine the browser 114 // window/client area rectangle or the rectangle for the page area 115 // then |bounds| will be an empty rectangle. 116 virtual void GetWidgetBounds(gfx::Rect* bounds) OVERRIDE; 117 118 // Additional accelerator handling (on top of what DropDownBarHost does). 119 virtual void RegisterAccelerators() OVERRIDE; 120 virtual void UnregisterAccelerators() OVERRIDE; 121 122 protected: 123 // Overridden from DropdownBarHost: 124 virtual void OnVisibilityChanged() OVERRIDE; 125 126 private: 127 // Allows implementation to tweak widget position. 128 void GetWidgetPositionNative(gfx::Rect* avoid_overlapping_rect); 129 130 // Allows native implementation to prevent key events from being forwarded. 131 bool ShouldForwardKeyEventToWebpageNative(const ui::KeyEvent& key_event); 132 133 // Returns the FindBarView. find_bar_view()134 FindBarView* find_bar_view() { return static_cast<FindBarView*>(view()); } 135 136 // A pointer back to the owning controller. 137 FindBarController* find_bar_controller_; 138 139 DISALLOW_COPY_AND_ASSIGN(FindBarHost); 140 }; 141 142 #endif // CHROME_BROWSER_UI_VIEWS_FIND_BAR_HOST_H_ 143