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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_WRAPPER_H_
#define UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_WRAPPER_H_
#include "ui/base/cursor/cursor.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/views/views_export.h"
namespace gfx {
class RoundedCornersF;
} // namespace gfx
namespace ui {
class Layer;
} // namespace ui
namespace views {
class NativeViewHost;
// An interface that implemented by an object that wraps a gfx::NativeView on
// a specific platform, used to perform platform specific operations on that
// native view when attached, detached, moved and sized.
class NativeViewHostWrapper {
public:
virtual ~NativeViewHostWrapper() = default;
// Called at the end of NativeViewHost::Attach, allowing the wrapper to
// perform platform-specific operations that need to occur to complete
// attaching the gfx::NativeView.
virtual void AttachNativeView() = 0;
// Called before the attached gfx::NativeView is detached from the
// NativeViewHost, allowing the wrapper to perform platform-specific
// cleanup. |destroyed| is true if the native view is detached
// because it's being destroyed, or false otherwise.
virtual void NativeViewDetaching(bool destroyed) = 0;
// Called when our associated NativeViewHost is added to a View hierarchy
// rooted at a valid Widget.
virtual void AddedToWidget() = 0;
// Called when our associated NativeViewHost is removed from a View hierarchy
// rooted at a valid Widget.
virtual void RemovedFromWidget() = 0;
// Clips the corners of the gfx::NativeView to the `corner_radii` specified.
// Returns true on success or false if the platform doesn't support the
// operation.
virtual bool SetCornerRadii(const gfx::RoundedCornersF& corner_radii) = 0;
// Sets the height of the top region where gfx::NativeView shouldn't be
// targeted.
virtual void SetHitTestTopInset(int top_inset) = 0;
virtual int GetHitTestTopInset() const = 0;
// Installs a clip on the gfx::NativeView. These values are in the coordinate
// space of the Widget, so if this method is called from ShowWidget
// then the values need to be translated.
virtual void InstallClip(int x, int y, int w, int h) = 0;
// Whether or not a clip has been installed on the wrapped gfx::NativeView.
virtual bool HasInstalledClip() = 0;
// Removes the clip installed on the gfx::NativeView by way of InstallClip. A
// following call to ShowWidget should occur after calling this method to
// position the gfx::NativeView correctly, since the clipping process may have
// adjusted its position.
virtual void UninstallClip() = 0;
// Shows the gfx::NativeView within the specified region (relative to the
// parent native view) and with the given native size. The content will
// appear scaled if the |native_w| or |native_h| are different from |w| or
// |h|.
virtual void ShowWidget(int x,
int y,
int w,
int h,
int native_w,
int native_h) = 0;
// Hides the gfx::NativeView. NOTE: this may be invoked when the native view
// is already hidden.
virtual void HideWidget() = 0;
// Sets focus to the gfx::NativeView.
virtual void SetFocus() = 0;
// Returns the container that contains the NativeViewHost's native view if
// any.
virtual gfx::NativeView GetNativeViewContainer() const = 0;
// Return the native view accessible corresponding to the wrapped native
// view.
virtual gfx::NativeViewAccessible GetNativeViewAccessible() = 0;
// Returns the cursor corresponding to the point (x, y) in the native view.
virtual ui::Cursor GetCursor(int x, int y) = 0;
// Sets the visibility of the gfx::NativeView. This differs from
// {Show,Hide}Widget because it doesn't affect the placement, size,
// or clipping of the view.
virtual void SetVisible(bool visible) = 0;
// Pass the parent accessible object to the native view so that it can return
// this value when querying its parent accessible.
virtual void SetParentAccessible(gfx::NativeViewAccessible) = 0;
// Returns the parent accessible object to the native view.
virtual gfx::NativeViewAccessible GetParentAccessible() = 0;
// Returns the ui::Layer hosting the WebContents.
virtual ui::Layer* GetUILayer() = 0;
// Creates a platform-specific instance of an object implementing this
// interface.
static NativeViewHostWrapper* CreateWrapper(NativeViewHost* host);
};
} // namespace views
#endif // UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_WRAPPER_H_
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