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// Copyright 2016 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_RENDERER_RENDER_WIDGET_DELEGATE_H_
#define CONTENT_RENDERER_RENDER_WIDGET_DELEGATE_H_
#include "content/common/content_export.h"
namespace blink {
class WebWidget;
struct WebDeviceEmulationParams;
} // namespace blink
namespace content {
//
// RenderWidgetDelegate
//
// An interface to provide View-level (and/or Page-level) functionality to
// the main frame's RenderWidget.
class CONTENT_EXPORT RenderWidgetDelegate {
public:
virtual ~RenderWidgetDelegate() = default;
// See comment in RenderWidgetHost::SetActive().
virtual void SetActiveForWidget(bool active) = 0;
// Returns whether multiple windows are allowed for the widget. If true, then
// Show() may be called more than once.
virtual bool SupportsMultipleWindowsForWidget() = 0;
// TODO(bokan): Temporary to unblock synthetic gesture events running under
// VR. https://crbug.com/940063
virtual bool ShouldAckSyntheticInputImmediately() = 0;
// ==================================
// These methods called during handling of a SynchronizeVisualProperties
// message to handle updating state on the delegate.
//
// Called during handling a SynchronizeVisualProperties message, if auto
// resize is enabled, with the new auto size limits.
virtual void ApplyAutoResizeLimitsForWidget(const gfx::Size& min_size,
const gfx::Size& max_size) = 0;
// Called during handling a SynchronizeVisualProperties message, if auto
// resize was enabled but is being disabled.
virtual void DisableAutoResizeForWidget() = 0;
// Called during handling a SynchronizeVisualProperties message, if the
// message informed that the focused node should be scrolled into view.
virtual void ScrollFocusedNodeIntoViewForWidget() = 0;
// ==================================
// Called when RenderWidget receives a SetFocus event.
virtual void DidReceiveSetFocusEventForWidget() = 0;
// Called when the RenderWidget handles
// LayerTreeViewDelegate::DidCommitCompositorFrame().
virtual void DidCommitCompositorFrameForWidget() = 0;
// Called when the RenderWidget handles
// LayerTreeViewDelegate::DidCompletePageScaleAnimation().
virtual void DidCompletePageScaleAnimationForWidget() = 0;
// Called to resize the WebWidget, so the delegate may change how resize
// happens.
virtual void ResizeWebWidgetForWidget(
const gfx::Size& size,
const gfx::Size& visible_viewport_size,
cc::BrowserControlsParams browser_controls_params) = 0;
// Called when RenderWidget services RenderWidgetScreenMetricsEmulatorDelegate
// SetScreenMetricsEmulationParameters().
virtual void SetScreenMetricsEmulationParametersForWidget(
bool enabled,
const blink::WebDeviceEmulationParams& params) = 0;
};
} // namespace content
#endif // CONTENT_RENDERER_RENDER_WIDGET_DELEGATE_H_
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