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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_FRAME_BROWSER_ROOT_VIEW_H_
#define CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_ROOT_VIEW_H_
#include "ui/views/widget/root_view.h"
class BrowserView;
class TabStrip;
namespace ui {
class OSExchangeData;
}
// RootView implementation used by BrowserFrame. This forwards drop events to
// the TabStrip. Visually the tabstrip extends to the top of the frame, but in
// actually it doesn't. The tabstrip is only as high as a tab. To enable
// dropping above the tabstrip BrowserRootView forwards drop events to the
// TabStrip.
class BrowserRootView : public views::internal::RootView {
public:
// Internal class name.
static const char kViewClassName[];
// You must call set_tabstrip before this class will accept drops.
BrowserRootView(BrowserView* browser_view, views::Widget* widget);
// Overridden from views::View:
bool GetDropFormats(
int* formats,
std::set<ui::OSExchangeData::CustomFormat>* custom_formats) override;
bool AreDropTypesRequired() override;
bool CanDrop(const ui::OSExchangeData& data) override;
void OnDragEntered(const ui::DropTargetEvent& event) override;
int OnDragUpdated(const ui::DropTargetEvent& event) override;
void OnDragExited() override;
int OnPerformDrop(const ui::DropTargetEvent& event) override;
const char* GetClassName() const override;
bool OnMouseWheel(const ui::MouseWheelEvent& event) override;
private:
// ui::EventProcessor:
void OnEventProcessingStarted(ui::Event* event) override;
// Returns true if the event should be forwarded to the tabstrip.
bool ShouldForwardToTabStrip(const ui::DropTargetEvent& event);
// Converts the event from the hosts coordinate system to the tabstrips
// coordinate system.
ui::DropTargetEvent* MapEventToTabStrip(
const ui::DropTargetEvent& event,
const ui::OSExchangeData& data);
inline TabStrip* tabstrip() const;
// Returns true if |data| has string contents and the user can "paste and go".
// If |url| is non-null and the user can "paste and go", |url| is set to the
// desired destination.
bool GetPasteAndGoURL(const ui::OSExchangeData& data, GURL* url);
// The BrowserView.
BrowserView* browser_view_;
// If true, drag and drop events are being forwarded to the tab strip.
// This is used to determine when to send OnDragEntered and OnDragExited
// to the tab strip.
bool forwarding_to_tab_strip_;
DISALLOW_COPY_AND_ASSIGN(BrowserRootView);
};
#endif // CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_ROOT_VIEW_H_
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