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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_VIEWS_FIND_BAR_HOST_H_
#define CHROME_BROWSER_UI_VIEWS_FIND_BAR_HOST_H_
#include "base/compiler_specific.h"
#include "chrome/browser/ui/find_bar/find_bar.h"
#include "chrome/browser/ui/views/dropdown_bar_host.h"
#include "chrome/browser/ui/views/find_bar_view.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/views/controls/textfield/textfield.h"
class BrowserView;
class FindBarController;
class FindNotificationDetails;
////////////////////////////////////////////////////////////////////////////////
//
// The FindBarHost implements the container widget for the
// find-in-page functionality. It uses the implementation from
// find_bar_host_aura.cc to draw its content and is responsible for showing,
// hiding, closing, and moving the widget if needed, for example if the widget
// is obscuring the selection results. It also receives notifications about the
// search results and communicates that to the view.
//
// There is one FindBarHost per BrowserView, and its state is updated
// whenever the selected Tab is changed. The FindBarHost is created when
// the BrowserView is attached to the frame's Widget for the first time.
//
////////////////////////////////////////////////////////////////////////////////
class FindBarHost : public DropdownBarHost,
public FindBar,
public FindBarTesting {
public:
explicit FindBarHost(BrowserView* browser_view);
~FindBarHost() override;
// Forwards selected key events to the renderer. This is useful to make sure
// that arrow keys and PageUp and PageDown result in scrolling, instead of
// being eaten because the FindBar has focus. Returns true if the keystroke
// was forwarded, false if not.
bool MaybeForwardKeyEventToWebpage(const ui::KeyEvent& key_event);
// FindBar implementation:
FindBarController* GetFindBarController() const override;
void SetFindBarController(FindBarController* find_bar_controller) override;
void Show(bool animate) override;
void Hide(bool animate) override;
void SetFocusAndSelection() override;
void ClearResults(const FindNotificationDetails& results) override;
void StopAnimation() override;
void MoveWindowIfNecessary(const gfx::Rect& selection_rect) override;
void SetFindTextAndSelectedRange(const base::string16& find_text,
const gfx::Range& selected_range) override;
base::string16 GetFindText() override;
gfx::Range GetSelectedRange() override;
void UpdateUIForFindResult(const FindNotificationDetails& result,
const base::string16& find_text) override;
void AudibleAlert() override;
bool IsFindBarVisible() override;
void RestoreSavedFocus() override;
bool HasGlobalFindPasteboard() override;
void UpdateFindBarForChangedWebContents() override;
FindBarTesting* GetFindBarTesting() override;
// Overridden from ui::AcceleratorTarget in DropdownBarHost class:
bool AcceleratorPressed(const ui::Accelerator& accelerator) override;
bool CanHandleAccelerators() const override;
// FindBarTesting implementation:
bool GetFindBarWindowInfo(gfx::Point* position, bool* fully_visible) override;
base::string16 GetFindSelectedText() override;
base::string16 GetMatchCountText() override;
int GetWidth() override;
// Overridden from DropdownBarHost:
// Returns the rectangle representing where to position the find bar. It uses
// GetDialogBounds and positions itself within that, either to the left (if an
// InfoBar is present) or to the right (no InfoBar). If
// |avoid_overlapping_rect| is specified, the return value will be a rectangle
// located immediately to the left of |avoid_overlapping_rect|, as long as
// there is enough room for the dialog to draw within the bounds. If not, the
// dialog position returned will overlap |avoid_overlapping_rect|.
// Note: |avoid_overlapping_rect| is expected to use coordinates relative to
// the top of the page area, (it will be converted to coordinates relative to
// the top of the browser window, when comparing against the dialog
// coordinates). The returned value is relative to the browser window.
gfx::Rect GetDialogPosition(gfx::Rect avoid_overlapping_rect) override;
// Moves the dialog window to the provided location, moves it to top in the
// z-order (HWND_TOP, not HWND_TOPMOST) and shows the window (if hidden).
// It then calls UpdateWindowEdges to make sure we don't overwrite the Chrome
// window border.
void SetDialogPosition(const gfx::Rect& new_pos) override;
// Retrieves the boundaries that the find bar widget has to work with
// within the Chrome frame window. The resulting rectangle will be a
// rectangle that overlaps the bottom of the Chrome toolbar by one
// pixel (so we can create the illusion that the dropdown widget is
// part of the toolbar) and covers the page area, except that we
// deflate the rect width by subtracting (from both sides) the width
// of the toolbar and some extra pixels to account for the width of
// the Chrome window borders. |bounds| is relative to the browser
// window. If the function fails to determine the browser
// window/client area rectangle or the rectangle for the page area
// then |bounds| will be an empty rectangle.
void GetWidgetBounds(gfx::Rect* bounds) override;
// Additional accelerator handling (on top of what DropDownBarHost does).
void RegisterAccelerators() override;
void UnregisterAccelerators() override;
protected:
// Overridden from DropdownBarHost:
void OnVisibilityChanged() override;
private:
// Allows implementation to tweak widget position.
void GetWidgetPositionNative(gfx::Rect* avoid_overlapping_rect);
// Returns the FindBarView.
FindBarView* find_bar_view() { return static_cast<FindBarView*>(view()); }
// A pointer back to the owning controller.
FindBarController* find_bar_controller_;
DISALLOW_COPY_AND_ASSIGN(FindBarHost);
};
#endif // CHROME_BROWSER_UI_VIEWS_FIND_BAR_HOST_H_
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