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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 CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_AURA_H_
#define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_AURA_H_
#include <memory>
#include <vector>
#include "base/gtest_prod_util.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "content/browser/renderer_host/overscroll_controller_delegate.h"
#include "content/browser/renderer_host/render_view_host_delegate_view.h"
#include "content/browser/web_contents/web_contents_view.h"
#include "content/common/buildflags.h"
#include "content/common/content_export.h"
#include "content/public/browser/global_routing_id.h"
#include "content/public/browser/visibility.h"
#include "ui/aura/client/drag_drop_delegate.h"
#include "ui/aura/window.h"
#include "ui/aura/window_delegate.h"
namespace ui {
class DropTargetEvent;
class TouchSelectionController;
}
namespace content {
class GestureNavSimple;
class OverscrollNavigationOverlay;
class RenderWidgetHostImpl;
class RenderWidgetHostViewAura;
class TouchSelectionControllerClientAura;
class WebContentsViewDelegate;
class WebContentsImpl;
class WebDragDestDelegate;
class CONTENT_EXPORT WebContentsViewAura
: public WebContentsView,
public RenderViewHostDelegateView,
public OverscrollControllerDelegate,
public aura::WindowDelegate,
public aura::client::DragDropDelegate {
public:
WebContentsViewAura(WebContentsImpl* web_contents,
WebContentsViewDelegate* delegate);
// Allow the WebContentsViewDelegate to be set explicitly.
void SetDelegateForTesting(WebContentsViewDelegate* delegate);
// Set a flag to pass nullptr as the parent_view argument to
// RenderWidgetHostViewAura::InitAsChild().
void set_init_rwhv_with_null_parent_for_testing(bool set) {
init_rwhv_with_null_parent_for_testing_ = set;
}
using RenderWidgetHostViewCreateFunction =
RenderWidgetHostViewAura* (*)(RenderWidgetHost*, bool);
// Used to override the creation of RenderWidgetHostViews in tests.
static void InstallCreateHookForTests(
RenderWidgetHostViewCreateFunction create_render_widget_host_view);
private:
class WindowObserver;
class MirrorWindowObserver;
~WebContentsViewAura() override;
void SizeChangedCommon(const gfx::Size& size);
void EndDrag(RenderWidgetHost* source_rwh, blink::WebDragOperationsMask ops);
void InstallOverscrollControllerDelegate(RenderWidgetHostViewAura* view);
// Sets up the content window in preparation for starting an overscroll
// gesture.
void PrepareContentWindowForOverscroll();
// Completes the navigation in response to a completed overscroll gesture.
// The navigation happens after an animation (either the overlay window
// animates in, or the content window animates out).
void CompleteOverscrollNavigation(OverscrollMode mode);
ui::TouchSelectionController* GetSelectionController() const;
TouchSelectionControllerClientAura* GetSelectionControllerClient() const;
// Returns GetNativeView unless overridden for testing.
gfx::NativeView GetRenderWidgetHostViewParent() const;
// Returns whether |target_rwh| is a valid RenderWidgetHost to be dragging
// over. This enforces that same-page, cross-site drags are not allowed. See
// crbug.com/666858.
bool IsValidDragTarget(RenderWidgetHostImpl* target_rwh) const;
// Called from CreateView() to create |window_|.
void CreateAuraWindow(aura::Window* context);
// Computes the view's visibility updates the WebContents accordingly.
void UpdateWebContentsVisibility();
// Computes the view's visibility.
Visibility GetVisibility() const;
// Overridden from WebContentsView:
gfx::NativeView GetNativeView() const override;
gfx::NativeView GetContentNativeView() const override;
gfx::NativeWindow GetTopLevelNativeWindow() const override;
void GetContainerBounds(gfx::Rect* out) const override;
void SizeContents(const gfx::Size& size) override;
void Focus() override;
void SetInitialFocus() override;
void StoreFocus() override;
void RestoreFocus() override;
void FocusThroughTabTraversal(bool reverse) override;
DropData* GetDropData() const override;
gfx::Rect GetViewBounds() const override;
void CreateView(const gfx::Size& initial_size,
gfx::NativeView context) override;
RenderWidgetHostViewBase* CreateViewForWidget(
RenderWidgetHost* render_widget_host,
bool is_guest_view_hack) override;
RenderWidgetHostViewBase* CreateViewForChildWidget(
RenderWidgetHost* render_widget_host) override;
void SetPageTitle(const base::string16& title) override;
void RenderViewCreated(RenderViewHost* host) override;
void RenderViewReady() override;
void RenderViewHostChanged(RenderViewHost* old_host,
RenderViewHost* new_host) override;
void SetOverscrollControllerEnabled(bool enabled) override;
// Overridden from RenderViewHostDelegateView:
void ShowContextMenu(RenderFrameHost* render_frame_host,
const ContextMenuParams& params) override;
void StartDragging(const DropData& drop_data,
blink::WebDragOperationsMask operations,
const gfx::ImageSkia& image,
const gfx::Vector2d& image_offset,
const DragEventSourceInfo& event_info,
RenderWidgetHostImpl* source_rwh) override;
void UpdateDragCursor(blink::WebDragOperation operation) override;
void GotFocus(RenderWidgetHostImpl* render_widget_host) override;
void LostFocus(RenderWidgetHostImpl* render_widget_host) override;
void TakeFocus(bool reverse) override;
#if BUILDFLAG(USE_EXTERNAL_POPUP_MENU)
void ShowPopupMenu(RenderFrameHost* render_frame_host,
const gfx::Rect& bounds,
int item_height,
double item_font_size,
int selected_item,
const std::vector<MenuItem>& items,
bool right_aligned,
bool allow_multiple_selection) override;
void HidePopupMenu() override;
#endif
// Overridden from OverscrollControllerDelegate:
gfx::Size GetDisplaySize() const override;
bool OnOverscrollUpdate(float delta_x, float delta_y) override;
void OnOverscrollComplete(OverscrollMode overscroll_mode) override;
void OnOverscrollModeChange(OverscrollMode old_mode,
OverscrollMode new_mode,
OverscrollSource source,
cc::OverscrollBehavior behavior) override;
base::Optional<float> GetMaxOverscrollDelta() const override;
// Overridden from aura::WindowDelegate:
gfx::Size GetMinimumSize() const override;
gfx::Size GetMaximumSize() const override;
void OnBoundsChanged(const gfx::Rect& old_bounds,
const gfx::Rect& new_bounds) override;
gfx::NativeCursor GetCursor(const gfx::Point& point) override;
int GetNonClientComponent(const gfx::Point& point) const override;
bool ShouldDescendIntoChildForEventHandling(
aura::Window* child,
const gfx::Point& location) override;
bool CanFocus() override;
void OnCaptureLost() override;
void OnPaint(const ui::PaintContext& context) override;
void OnDeviceScaleFactorChanged(float old_device_scale_factor,
float new_device_scale_factor) override;
void OnWindowDestroying(aura::Window* window) override;
void OnWindowDestroyed(aura::Window* window) override;
void OnWindowTargetVisibilityChanged(bool visible) override;
void OnWindowOcclusionChanged(aura::Window::OcclusionState occlusion_state,
const SkRegion&) override;
bool HasHitTestMask() const override;
void GetHitTestMask(gfx::Path* mask) const override;
// Overridden from ui::EventHandler:
void OnKeyEvent(ui::KeyEvent* event) override;
void OnMouseEvent(ui::MouseEvent* event) override;
// Overridden from aura::client::DragDropDelegate:
void OnDragEntered(const ui::DropTargetEvent& event) override;
int OnDragUpdated(const ui::DropTargetEvent& event) override;
void OnDragExited() override;
int OnPerformDrop(const ui::DropTargetEvent& event) override;
FRIEND_TEST_ALL_PREFIXES(WebContentsViewAuraTest, EnableDisableOverscroll);
const bool is_mus_browser_plugin_guest_;
// NOTE: this is null when running in mus and |is_mus_browser_plugin_guest_|.
std::unique_ptr<aura::Window> window_;
std::unique_ptr<WindowObserver> window_observer_;
std::unique_ptr<MirrorWindowObserver> mirror_window_observer_;
// The WebContentsImpl whose contents we display.
WebContentsImpl* web_contents_;
std::unique_ptr<WebContentsViewDelegate> delegate_;
blink::WebDragOperationsMask current_drag_op_;
std::unique_ptr<DropData> current_drop_data_;
WebDragDestDelegate* drag_dest_delegate_;
// We keep track of the RenderWidgetHost we're dragging over. If it changes
// during a drag, we need to re-send the DragEnter message.
base::WeakPtr<RenderWidgetHostImpl> current_rwh_for_drag_;
// We also keep track of the ID of the RenderViewHost we're dragging over to
// avoid sending the drag exited message after leaving the current view.
GlobalRoutingID current_rvh_for_drag_;
// We track the IDs of the source RenderProcessHost and RenderViewHost from
// which the current drag originated. These are used to ensure that drag
// events do not fire over a cross-site frame (with respect to the source
// frame) in the same page (see crbug.com/666858). Specifically, the
// RenderViewHost is used to check the "same page" property, while the
// RenderProcessHost is used to check the "cross-site" property. Note that the
// reason the RenderProcessHost is tracked instead of the RenderWidgetHost is
// so that we still allow drags between non-contiguous same-site frames (such
// frames will have the same process, but different widgets). Note also that
// the RenderViewHost may not be in the same process as the RenderProcessHost,
// since the view corresponds to the page, while the process is specific to
// the frame from which the drag started.
int drag_start_process_id_;
GlobalRoutingID drag_start_view_id_;
// The overscroll gesture currently in progress.
OverscrollMode current_overscroll_gesture_;
// This is the completed overscroll gesture. This is used for the animation
// callback that happens in response to a completed overscroll gesture.
OverscrollMode completed_overscroll_gesture_;
// This manages the overlay window that shows the screenshot during a history
// navigation triggered by the overscroll gesture.
std::unique_ptr<OverscrollNavigationOverlay> navigation_overlay_;
std::unique_ptr<GestureNavSimple> gesture_nav_simple_;
bool init_rwhv_with_null_parent_for_testing_;
DISALLOW_COPY_AND_ASSIGN(WebContentsViewAura);
};
} // namespace content
#endif // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_AURA_H_