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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.
#include "content/renderer/render_widget.h"
#include <cmath>
#include <limits>
#include <memory>
#include <utility>
#include "base/bind.h"
#include "base/callback_helpers.h"
#include "base/logging.h"
#include "base/macros.h"
#include "cc/trees/layer_tree_host.h"
#include "cc/trees/ukm_manager.h"
#include "content/renderer/render_thread_impl.h"
#include "ppapi/buildflags/buildflags.h"
#include "third_party/blink/public/platform/web_rect.h"
#include "third_party/blink/public/web/web_frame_widget.h"
#include "third_party/blink/public/web/web_page_popup.h"
#include "third_party/blink/public/web/web_widget.h"
#include "ui/gfx/geometry/rect_conversions.h"
namespace content {
namespace {
RenderWidget::CreateRenderWidgetFunction g_create_render_widget_for_frame =
nullptr;
} // namespace
// RenderWidget ---------------------------------------------------------------
// static
void RenderWidget::InstallCreateForFrameHook(
CreateRenderWidgetFunction create_widget) {
g_create_render_widget_for_frame = create_widget;
}
std::unique_ptr<RenderWidget> RenderWidget::CreateForFrame(
CompositorDependencies* compositor_deps) {
if (g_create_render_widget_for_frame) {
return g_create_render_widget_for_frame(compositor_deps);
}
return std::make_unique<RenderWidget>(compositor_deps);
}
RenderWidget* RenderWidget::CreateForPopup(
CompositorDependencies* compositor_deps) {
return new RenderWidget(compositor_deps);
}
RenderWidget::RenderWidget(CompositorDependencies* compositor_deps)
: compositor_deps_(compositor_deps) {
DCHECK(RenderThread::IsMainThread());
DCHECK(compositor_deps_);
}
RenderWidget::~RenderWidget() {
DCHECK(!webwidget_) << "Leaking our WebWidget!";
DCHECK(closing_)
<< " RenderWidget must be destroyed via RenderWidget::Close()";
}
void RenderWidget::InitForPopup(RenderWidget* opener_widget,
blink::WebPagePopup* web_page_popup,
const blink::ScreenInfo& screen_info) {
for_popup_ = true;
Initialize(web_page_popup, screen_info);
}
void RenderWidget::InitForMainFrame(blink::WebFrameWidget* web_frame_widget,
const blink::ScreenInfo& screen_info,
RenderWidgetDelegate& delegate) {
delegate_ = &delegate;
Initialize(web_frame_widget, screen_info);
}
void RenderWidget::InitForChildLocalRoot(
blink::WebFrameWidget* web_frame_widget,
const blink::ScreenInfo& screen_info) {
for_child_local_root_frame_ = true;
Initialize(web_frame_widget, screen_info);
}
void RenderWidget::CloseForFrame(std::unique_ptr<RenderWidget> widget) {
DCHECK(for_frame());
DCHECK_EQ(widget.get(), this); // This method takes ownership of |this|.
Close(std::move(widget));
}
void RenderWidget::Initialize(blink::WebWidget* web_widget,
const blink::ScreenInfo& screen_info) {
DCHECK(web_widget);
webwidget_ = web_widget;
if (auto* scheduler_state = GetWebWidget()->RendererWidgetSchedulingState())
scheduler_state->SetHidden(web_widget->IsHidden());
InitCompositing(screen_info);
// If the widget is hidden, delay starting the compositor until the user
// shows it. Otherwise start the compositor immediately. If the widget is
// for a provisional frame, this importantly starts the compositor before
// the frame is inserted into the frame tree, which impacts first paint
// metrics.
if (!web_widget->IsHidden())
web_widget->SetCompositorVisible(true);
}
void RenderWidget::BrowserClosedIpcChannelForPopupWidget() {
DCHECK(for_popup_);
Close(base::WrapUnique(this));
}
void RenderWidget::ScheduleAnimation() {
// This call is not needed in single thread mode for tests without a
// scheduler, but they override this method in order to schedule a synchronous
// composite task themselves.
// TODO(dtapuska): ScheduleAnimation might get called before layer_tree_host_
// is assigned, inside the InitializeCompositing call. This should eventually
// go away when this is moved inside blink. https://crbug.com/1097816
if (layer_tree_host_)
layer_tree_host_->SetNeedsAnimate();
}
void RenderWidget::UpdateTextInputState() {
GetWebWidget()->UpdateTextInputState();
}
///////////////////////////////////////////////////////////////////////////////
// WebWidgetClient
void RenderWidget::SetHandlingInputEvent(bool handling_input_event) {
GetWebWidget()->SetHandlingInputEvent(handling_input_event);
}
void RenderWidget::InitCompositing(const blink::ScreenInfo& screen_info) {
TRACE_EVENT0("blink", "RenderWidget::InitializeLayerTreeView");
layer_tree_host_ = webwidget_->InitializeCompositing(
compositor_deps_->GetWebMainThreadScheduler(),
compositor_deps_->GetTaskGraphRunner(), for_child_local_root_frame_,
screen_info, compositor_deps_->CreateUkmRecorderFactory(),
/*settings=*/nullptr);
DCHECK(layer_tree_host_);
}
void RenderWidget::Close(std::unique_ptr<RenderWidget> widget) {
// At the end of this method, |widget| which points to this is deleted.
DCHECK_EQ(widget.get(), this);
DCHECK(RenderThread::IsMainThread());
DCHECK(!closing_);
closing_ = true;
webwidget_->Close(compositor_deps_->GetCleanupTaskRunner());
webwidget_ = nullptr;
// |layer_tree_host_| is valid only when |webwidget_| is valid. Close may
// use the WebWidgetClient while unloading the Frame so we clear this
// after.
layer_tree_host_ = nullptr;
}
blink::WebFrameWidget* RenderWidget::GetFrameWidget() const {
// TODO(danakj): Remove this check and don't call this method for non-frames.
if (!for_frame())
return nullptr;
return static_cast<blink::WebFrameWidget*>(webwidget_);
}
void RenderWidget::ConvertViewportToWindow(blink::WebRect* rect) {
if (compositor_deps_->IsUseZoomForDSFEnabled()) {
float reverse =
1 / GetWebWidget()->GetOriginalScreenInfo().device_scale_factor;
// TODO(oshima): We may need to allow pixel precision here as the the
// anchor element can be placed at half pixel.
gfx::Rect window_rect = gfx::ScaleToEnclosedRect(gfx::Rect(*rect), reverse);
rect->x = window_rect.x();
rect->y = window_rect.y();
rect->width = window_rect.width();
rect->height = window_rect.height();
}
}
void RenderWidget::UpdateSelectionBounds() {
GetWebWidget()->UpdateSelectionBounds();
}
} // namespace content
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