309 lines
9.0 KiB
C++
309 lines
9.0 KiB
C++
// Copyright 2016 The Chromium Embedded Framework Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be found
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// in the LICENSE file.
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#include "libcef/browser/views/view_util.h"
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#include <utility>
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#include "libcef/browser/views/view_adapter.h"
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#include "ui/display/display.h"
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#include "ui/display/screen.h"
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#include "ui/gfx/geometry/point.h"
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#include "ui/gfx/geometry/point_conversions.h"
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#include "ui/views/widget/widget.h"
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#include "ui/views/widget/widget_delegate.h"
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#include "ui/views/window/non_client_view.h"
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#if defined(OS_WIN)
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#include "ui/display/win/screen_win.h"
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#endif
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#if defined(USE_AURA)
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#include "ui/aura/window.h"
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#include "ui/views/view_constants_aura.h"
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#endif
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namespace view_util {
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namespace {
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// Manages the association between views::View and CefView instances.
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class UserData : public base::SupportsUserData::Data {
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public:
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// Create the initial association between the views::View and the CefView. The
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// CefView owns the views::View at this stage.
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static void Register(CefRefPtr<CefView> cef_view) {
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DCHECK(cef_view->IsValid());
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DCHECK(!cef_view->IsAttached());
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views::View* view = CefViewAdapter::GetFor(cef_view)->Get();
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DCHECK(view);
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// The CefView should not already be registered.
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DCHECK(!view->GetUserData(UserDataKey()));
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view->SetUserData(UserDataKey(), base::WrapUnique(new UserData(cef_view)));
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}
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static CefRefPtr<CefView> GetFor(const views::View* view) {
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DCHECK(view);
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UserData* data = static_cast<UserData*>(view->GetUserData(UserDataKey()));
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if (data)
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return data->view_ref_;
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return nullptr;
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}
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// Transfer ownership of the views::View to the caller. The views::View will
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// gain a ref-counted reference to the CefView and the CefView will keep an
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// unowned reference to the views::View. Destruction of the views::View will
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// release the ref-counted reference to the CefView.
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static std::unique_ptr<views::View> PassOwnership(CefRefPtr<CefView> cef_view)
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WARN_UNUSED_RESULT {
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DCHECK(cef_view->IsValid());
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DCHECK(!cef_view->IsAttached());
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std::unique_ptr<views::View> view =
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CefViewAdapter::GetFor(cef_view)->PassOwnership();
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DCHECK(view);
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UserData* data = static_cast<UserData*>(view->GetUserData(UserDataKey()));
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DCHECK(data);
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data->TakeReference();
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return view;
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}
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// The CefView resumes ownership of the views::View. The views::View no longer
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// keeps a ref-counted reference to the CefView.
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static void ResumeOwnership(CefRefPtr<CefView> cef_view) {
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DCHECK(cef_view->IsValid());
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DCHECK(cef_view->IsAttached());
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CefViewAdapter* adapter = CefViewAdapter::GetFor(cef_view);
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adapter->ResumeOwnership();
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views::View* view = adapter->Get();
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DCHECK(view);
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UserData* data = static_cast<UserData*>(view->GetUserData(UserDataKey()));
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DCHECK(data);
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data->ReleaseReference();
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}
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private:
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friend std::default_delete<UserData>;
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explicit UserData(CefRefPtr<CefView> cef_view) : view_ref_(cef_view.get()) {
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DCHECK(view_ref_);
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}
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~UserData() override {
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if (view_) {
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// The CefView does not own the views::View. Remove the CefView's
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// reference to the views::View.
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CefViewAdapter::GetFor(view_)->Detach();
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}
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}
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void TakeReference() { view_ = view_ref_; }
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void ReleaseReference() { view_ = nullptr; }
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static void* UserDataKey() {
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// We just need a unique constant. Use the address of a static that
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// COMDAT folding won't touch in an optimizing linker.
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static int data_key = 0;
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return reinterpret_cast<void*>(&data_key);
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}
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CefRefPtr<CefView> view_;
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CefView* view_ref_;
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};
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} // namespace
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const SkColor kDefaultBackgroundColor = SkColorSetARGB(255, 255, 255, 255);
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const char kDefaultFontList[] = "Arial, Helvetica, 14px";
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void Register(CefRefPtr<CefView> view) {
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UserData::Register(view);
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}
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CefRefPtr<CefView> GetFor(const views::View* view, bool find_known_parent) {
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if (!view)
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return nullptr;
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if (!find_known_parent)
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return UserData::GetFor(view);
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CefRefPtr<CefView> cef_view;
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const views::View* current_view = view;
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do {
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cef_view = UserData::GetFor(current_view);
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if (cef_view)
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break;
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current_view = current_view->parent();
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} while (current_view);
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return cef_view;
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}
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views::View* GetFor(CefRefPtr<CefView> view) {
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return CefViewAdapter::GetFor(view)->Get();
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}
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std::unique_ptr<views::View> PassOwnership(CefRefPtr<CefView> view) {
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return UserData::PassOwnership(view);
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}
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void ResumeOwnership(CefRefPtr<CefView> view) {
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UserData::ResumeOwnership(view);
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}
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CefRefPtr<CefWindow> GetWindowFor(views::Widget* widget) {
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CefRefPtr<CefWindow> window;
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#if defined(USE_AURA)
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// Retrieve the parent Widget for an overlay.
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if (widget) {
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// See matching logic in CefOverlayViewHost::Init.
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auto widget_view =
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widget->GetNativeView()->GetProperty(views::kHostViewKey);
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if (widget_view) {
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widget = widget_view->GetWidget();
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}
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}
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#endif // defined(USE_AURA)
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if (widget) {
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// The views::WidgetDelegate should be a CefWindowView and |content_view|
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// should be the same CefWindowView. However, just in case the views::Widget
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// was created by something else let's go about this the safer way.
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views::View* content_view = widget->widget_delegate()->GetContentsView();
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CefRefPtr<CefView> cef_view = GetFor(content_view, false);
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if (cef_view && cef_view->AsPanel())
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window = cef_view->AsPanel()->AsWindow();
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// The Window should always exist if we created the views::Widget.
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DCHECK(window);
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}
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return window;
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}
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display::Display GetDisplayNearestPoint(const gfx::Point& point,
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bool input_pixel_coords) {
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gfx::Point find_point = point;
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#if defined(OS_WIN)
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if (input_pixel_coords) {
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find_point = gfx::ToFlooredPoint(
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display::win::ScreenWin::ScreenToDIPPoint(gfx::PointF(point)));
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}
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#endif
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return display::Screen::GetScreen()->GetDisplayNearestPoint(find_point);
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}
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display::Display GetDisplayMatchingBounds(const gfx::Rect& bounds,
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bool input_pixel_coords) {
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gfx::Rect find_bounds = bounds;
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#if defined(OS_WIN)
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if (input_pixel_coords) {
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find_bounds =
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display::win::ScreenWin::ScreenToDIPRect(nullptr, find_bounds);
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}
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#endif
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return display::Screen::GetScreen()->GetDisplayMatching(find_bounds);
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}
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void ConvertPointFromPixels(gfx::Point* point, int device_scale_factor) {
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*point = gfx::ToFlooredPoint(
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gfx::ScalePoint(gfx::PointF(*point), 1.0f / device_scale_factor));
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}
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void ConvertPointToPixels(gfx::Point* point, int device_scale_factor) {
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*point = gfx::ToFlooredPoint(
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gfx::ScalePoint(gfx::PointF(*point), device_scale_factor));
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}
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bool ConvertPointToScreen(views::View* view,
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gfx::Point* point,
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bool output_pixel_coords) {
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if (!view->GetWidget())
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return false;
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views::View::ConvertPointToScreen(view, point);
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if (output_pixel_coords) {
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const display::Display& display = GetDisplayNearestPoint(*point, false);
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ConvertPointToPixels(point, display.device_scale_factor());
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}
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return true;
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}
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bool ConvertPointFromScreen(views::View* view,
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gfx::Point* point,
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bool input_pixel_coords) {
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if (!view->GetWidget())
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return false;
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if (input_pixel_coords) {
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const display::Display& display = GetDisplayNearestPoint(*point, true);
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ConvertPointFromPixels(point, display.device_scale_factor());
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}
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views::View::ConvertPointFromScreen(view, point);
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return true;
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}
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bool ConvertPointToWindow(views::View* view, gfx::Point* point) {
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views::Widget* widget = view->GetWidget();
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if (!widget)
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return false;
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views::View::ConvertPointToWidget(view, point);
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if (widget->non_client_view()) {
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views::NonClientFrameView* non_client_frame_view =
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widget->non_client_view()->frame_view();
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if (non_client_frame_view) {
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// When using a custom drawn NonClientFrameView the native Window will not
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// know the actual client bounds. Adjust the native Window bounds for the
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// reported client bounds.
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const gfx::Rect& client_bounds =
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non_client_frame_view->GetBoundsForClientView();
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*point -= client_bounds.OffsetFromOrigin();
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}
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}
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return true;
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}
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bool ConvertPointFromWindow(views::View* view, gfx::Point* point) {
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views::Widget* widget = view->GetWidget();
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if (!widget)
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return false;
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if (widget->non_client_view()) {
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views::NonClientFrameView* non_client_frame_view =
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widget->non_client_view()->frame_view();
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if (non_client_frame_view) {
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// When using a custom drawn NonClientFrameView the native Window will not
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// know the actual client bounds. Adjust the native Window bounds for the
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// reported client bounds.
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const gfx::Rect& client_bounds =
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non_client_frame_view->GetBoundsForClientView();
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*point += client_bounds.OffsetFromOrigin();
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}
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}
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views::View::ConvertPointFromWidget(view, point);
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return true;
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}
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} // namespace view_util
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