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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.
#include "content/renderer/devtools/render_widget_screen_metrics_emulator.h"
#include "content/common/resize_params.h"
#include "content/public/common/context_menu_params.h"
#include "content/renderer/devtools/render_widget_screen_metrics_emulator_delegate.h"
namespace content {
RenderWidgetScreenMetricsEmulator::RenderWidgetScreenMetricsEmulator(
RenderWidgetScreenMetricsEmulatorDelegate* delegate,
const blink::WebDeviceEmulationParams& params,
const ResizeParams& resize_params,
const gfx::Rect& view_screen_rect,
const gfx::Rect& window_screen_rect)
: delegate_(delegate),
emulation_params_(params),
scale_(1.f),
original_resize_params_(resize_params),
original_view_screen_rect_(view_screen_rect),
original_window_screen_rect_(window_screen_rect) {
}
RenderWidgetScreenMetricsEmulator::~RenderWidgetScreenMetricsEmulator() {
delegate_->SetScreenMetricsEmulationParameters(false, emulation_params_);
delegate_->SetScreenRects(original_view_screen_rect_,
original_window_screen_rect_);
delegate_->Resize(original_resize_params_);
}
void RenderWidgetScreenMetricsEmulator::ChangeEmulationParams(
const blink::WebDeviceEmulationParams& params) {
emulation_params_ = params;
Apply();
}
void RenderWidgetScreenMetricsEmulator::Apply() {
ResizeParams modified_resize_params = original_resize_params_;
applied_widget_rect_.set_size(gfx::Size(emulation_params_.viewSize));
if (!applied_widget_rect_.width())
applied_widget_rect_.set_width(original_size().width());
if (!applied_widget_rect_.height())
applied_widget_rect_.set_height(original_size().height());
if (emulation_params_.fitToView && !original_size().IsEmpty()) {
int original_width = std::max(original_size().width(), 1);
int original_height = std::max(original_size().height(), 1);
float width_ratio =
static_cast<float>(applied_widget_rect_.width()) / original_width;
float height_ratio =
static_cast<float>(applied_widget_rect_.height()) / original_height;
float ratio = std::max(1.0f, std::max(width_ratio, height_ratio));
scale_ = 1.f / ratio;
// Center emulated view inside available view space.
offset_.set_x(
(original_size().width() - scale_ * applied_widget_rect_.width()) / 2);
offset_.set_y(
(original_size().height() - scale_ * applied_widget_rect_.height()) /
2);
} else {
scale_ = emulation_params_.scale;
offset_.SetPoint(emulation_params_.offset.x, emulation_params_.offset.y);
if (!emulation_params_.viewSize.width &&
!emulation_params_.viewSize.height && scale_) {
applied_widget_rect_.set_size(
gfx::ScaleToRoundedSize(original_size(), 1.f / scale_));
}
}
gfx::Rect window_screen_rect;
if (emulation_params_.screenPosition ==
blink::WebDeviceEmulationParams::Desktop) {
applied_widget_rect_.set_origin(original_view_screen_rect_.origin());
modified_resize_params.screen_info.rect = original_screen_info().rect;
modified_resize_params.screen_info.availableRect =
original_screen_info().availableRect;
window_screen_rect = original_window_screen_rect_;
} else {
applied_widget_rect_.set_origin(emulation_params_.viewPosition);
gfx::Rect screen_rect = applied_widget_rect_;
if (!emulation_params_.screenSize.isEmpty()) {
screen_rect = gfx::Rect(0, 0, emulation_params_.screenSize.width,
emulation_params_.screenSize.height);
}
modified_resize_params.screen_info.rect = screen_rect;
modified_resize_params.screen_info.availableRect = screen_rect;
window_screen_rect = applied_widget_rect_;
}
modified_resize_params.screen_info.deviceScaleFactor =
emulation_params_.deviceScaleFactor
? emulation_params_.deviceScaleFactor
: original_screen_info().deviceScaleFactor;
if (emulation_params_.screenOrientationType !=
blink::WebScreenOrientationUndefined) {
modified_resize_params.screen_info.orientationType =
emulation_params_.screenOrientationType;
modified_resize_params.screen_info.orientationAngle =
emulation_params_.screenOrientationAngle;
}
// Pass three emulation parameters to the blink side:
// - we keep the real device scale factor in compositor to produce sharp image
// even when emulating different scale factor;
// - in order to fit into view, WebView applies offset and scale to the
// root layer.
blink::WebDeviceEmulationParams modified_emulation_params = emulation_params_;
modified_emulation_params.deviceScaleFactor =
original_screen_info().deviceScaleFactor;
modified_emulation_params.offset =
blink::WebFloatPoint(offset_.x(), offset_.y());
modified_emulation_params.scale = scale_;
delegate_->SetScreenMetricsEmulationParameters(true,
modified_emulation_params);
delegate_->SetScreenRects(applied_widget_rect_, window_screen_rect);
modified_resize_params.physical_backing_size =
gfx::ScaleToCeiledSize(original_resize_params_.new_size,
original_screen_info().deviceScaleFactor);
modified_resize_params.new_size = applied_widget_rect_.size();
modified_resize_params.visible_viewport_size = applied_widget_rect_.size();
modified_resize_params.needs_resize_ack = false;
delegate_->Resize(modified_resize_params);
}
void RenderWidgetScreenMetricsEmulator::OnResize(const ResizeParams& params) {
original_resize_params_ = params;
Apply();
if (params.needs_resize_ack)
delegate_->Redraw();
}
void RenderWidgetScreenMetricsEmulator::OnUpdateWindowScreenRect(
const gfx::Rect& window_screen_rect) {
original_window_screen_rect_ = window_screen_rect;
if (emulation_params_.screenPosition ==
blink::WebDeviceEmulationParams::Desktop)
Apply();
}
void RenderWidgetScreenMetricsEmulator::OnUpdateScreenRects(
const gfx::Rect& view_screen_rect,
const gfx::Rect& window_screen_rect) {
original_view_screen_rect_ = view_screen_rect;
original_window_screen_rect_ = window_screen_rect;
if (emulation_params_.screenPosition ==
blink::WebDeviceEmulationParams::Desktop) {
Apply();
}
}
void RenderWidgetScreenMetricsEmulator::OnShowContextMenu(
ContextMenuParams* params) {
params->x *= scale_;
params->x += offset_.x();
params->y *= scale_;
params->y += offset_.y();
}
gfx::Rect RenderWidgetScreenMetricsEmulator::AdjustValidationMessageAnchor(
const gfx::Rect& anchor) {
gfx::Rect scaled = gfx::ScaleToEnclosedRect(anchor, scale_);
scaled.set_x(scaled.x() + offset_.x());
scaled.set_y(scaled.y() + offset_.y());
return scaled;
}
} // namespace content
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