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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_DEVTOOLS_RENDER_WIDGET_SCREEN_METRICS_EMULATOR_H_
#define CONTENT_RENDERER_DEVTOOLS_RENDER_WIDGET_SCREEN_METRICS_EMULATOR_H_
#include "base/memory/scoped_ptr.h"
#include "content/common/resize_params.h"
#include "third_party/WebKit/public/web/WebDeviceEmulationParams.h"
namespace gfx {
class PointF;
class Rect;
}
namespace content {
class RenderWidgetScreenMetricsEmulatorDelegate;
struct ContextMenuParams;
// RenderWidgetScreenMetricsEmulator class manages screen emulation inside a
// RenderWidget. This includes resizing, placing view on the screen at desired
// position, changing device scale factor, and scaling down the whole
// widget if required to fit into the browser window.
class RenderWidgetScreenMetricsEmulator {
public:
RenderWidgetScreenMetricsEmulator(
RenderWidgetScreenMetricsEmulatorDelegate* delegate,
const blink::WebDeviceEmulationParams& params,
const ResizeParams& resize_params,
const gfx::Rect& view_screen_rect,
const gfx::Rect& window_screen_rect);
virtual ~RenderWidgetScreenMetricsEmulator();
// Scale and offset used to convert between host coordinates
// and webwidget coordinates.
const gfx::Size& original_size() const {
return original_resize_params_.new_size;
}
float scale() const { return scale_; }
const gfx::PointF& offset() const { return offset_; }
const gfx::Rect& applied_widget_rect() const { return applied_widget_rect_; }
const blink::WebScreenInfo& original_screen_info() const {
return original_resize_params_.screen_info;
}
const gfx::Rect& original_screen_rect() const {
return original_view_screen_rect_;
}
void ChangeEmulationParams(const blink::WebDeviceEmulationParams& params);
// The following methods alter handlers' behavior for messages related to
// widget size and position.
void OnResize(const ResizeParams& params);
void OnUpdateWindowScreenRect(const gfx::Rect& window_screen_rect);
void OnUpdateScreenRects(const gfx::Rect& view_screen_rect,
const gfx::Rect& window_screen_rect);
void OnShowContextMenu(ContextMenuParams* params);
gfx::Rect AdjustValidationMessageAnchor(const gfx::Rect& anchor);
// Apply parameters to the render widget.
void Apply();
private:
RenderWidgetScreenMetricsEmulatorDelegate* const delegate_;
// Parameters as passed by RenderWidget::EnableScreenMetricsEmulation.
blink::WebDeviceEmulationParams emulation_params_;
// The computed scale and offset used to fit widget into browser window.
float scale_;
gfx::PointF offset_;
// Widget rect as passed to webwidget.
gfx::Rect applied_widget_rect_;
// Original values to restore back after emulation ends.
ResizeParams original_resize_params_;
gfx::Rect original_view_screen_rect_;
gfx::Rect original_window_screen_rect_;
DISALLOW_COPY_AND_ASSIGN(RenderWidgetScreenMetricsEmulator);
};
} // namespace content
#endif // CONTENT_RENDERER_DEVTOOLS_RENDER_WIDGET_SCREEN_METRICS_EMULATOR_H_
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