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electron_api_screen.cc
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electron_api_screen.cc
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// Copyright (c) 2013 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "shell/browser/api/electron_api_screen.h"
#include <string>
#include "base/bind.h"
#include "gin/dictionary.h"
#include "gin/handle.h"
#include "shell/browser/browser.h"
#include "shell/common/gin_converters/callback_converter.h"
#include "shell/common/gin_converters/gfx_converter.h"
#include "shell/common/gin_converters/native_window_converter.h"
#include "shell/common/gin_helper/dictionary.h"
#include "shell/common/gin_helper/object_template_builder.h"
#include "shell/common/node_includes.h"
#include "ui/display/display.h"
#include "ui/display/screen.h"
#include "ui/gfx/geometry/point.h"
#if BUILDFLAG(IS_WIN)
#include "ui/display/win/screen_win.h"
#endif
#if defined(USE_OZONE)
#include "ui/ozone/public/ozone_platform.h"
#endif
namespace electron::api {
gin::WrapperInfo Screen::kWrapperInfo = {gin::kEmbedderNativeGin};
namespace {
// Convert the changed_metrics bitmask to string array.
std::vector<std::string> MetricsToArray(uint32_t metrics) {
std::vector<std::string> array;
if (metrics & display::DisplayObserver::DISPLAY_METRIC_BOUNDS)
array.emplace_back("bounds");
if (metrics & display::DisplayObserver::DISPLAY_METRIC_WORK_AREA)
array.emplace_back("workArea");
if (metrics & display::DisplayObserver::DISPLAY_METRIC_DEVICE_SCALE_FACTOR)
array.emplace_back("scaleFactor");
if (metrics & display::DisplayObserver::DISPLAY_METRIC_ROTATION)
array.emplace_back("rotation");
return array;
}
void DelayEmit(Screen* screen,
base::StringPiece name,
const display::Display& display) {
screen->Emit(name, display);
}
void DelayEmitWithMetrics(Screen* screen,
base::StringPiece name,
const display::Display& display,
const std::vector<std::string>& metrics) {
screen->Emit(name, display, metrics);
}
} // namespace
Screen::Screen(v8::Isolate* isolate, display::Screen* screen)
: screen_(screen) {
screen_->AddObserver(this);
}
Screen::~Screen() {
screen_->RemoveObserver(this);
}
gfx::Point Screen::GetCursorScreenPoint(v8::Isolate* isolate) {
#if defined(USE_OZONE)
// Wayland will crash unless a window is reated prior to calling
// GetCursorScreenPoint.
if (!ui::OzonePlatform::IsInitialized()) {
gin_helper::ErrorThrower thrower(isolate);
thrower.ThrowError(
"screen.getCursorScreenPoint() cannot be called before a window has "
"been created.");
return gfx::Point();
}
#endif // BUILDFLAG(USE_OZONE)
return screen_->GetCursorScreenPoint();
}
display::Display Screen::GetPrimaryDisplay() {
return screen_->GetPrimaryDisplay();
}
std::vector<display::Display> Screen::GetAllDisplays() {
return screen_->GetAllDisplays();
}
display::Display Screen::GetDisplayNearestPoint(const gfx::Point& point) {
return screen_->GetDisplayNearestPoint(point);
}
display::Display Screen::GetDisplayMatching(const gfx::Rect& match_rect) {
return screen_->GetDisplayMatching(match_rect);
}
#if BUILDFLAG(IS_WIN)
static gfx::Rect ScreenToDIPRect(electron::NativeWindow* window,
const gfx::Rect& rect) {
HWND hwnd = window ? window->GetAcceleratedWidget() : nullptr;
return display::win::ScreenWin::ScreenToDIPRect(hwnd, rect);
}
static gfx::Rect DIPToScreenRect(electron::NativeWindow* window,
const gfx::Rect& rect) {
HWND hwnd = window ? window->GetAcceleratedWidget() : nullptr;
return display::win::ScreenWin::DIPToScreenRect(hwnd, rect);
}
#endif
void Screen::OnDisplayAdded(const display::Display& new_display) {
base::ThreadTaskRunnerHandle::Get()->PostNonNestableTask(
FROM_HERE, base::BindOnce(&DelayEmit, base::Unretained(this),
"display-added", new_display));
}
void Screen::OnDisplayRemoved(const display::Display& old_display) {
base::ThreadTaskRunnerHandle::Get()->PostNonNestableTask(
FROM_HERE, base::BindOnce(&DelayEmit, base::Unretained(this),
"display-removed", old_display));
}
void Screen::OnDisplayMetricsChanged(const display::Display& display,
uint32_t changed_metrics) {
base::ThreadTaskRunnerHandle::Get()->PostNonNestableTask(
FROM_HERE, base::BindOnce(&DelayEmitWithMetrics, base::Unretained(this),
"display-metrics-changed", display,
MetricsToArray(changed_metrics)));
}
// static
v8::Local<v8::Value> Screen::Create(gin_helper::ErrorThrower error_thrower) {
if (!Browser::Get()->is_ready()) {
error_thrower.ThrowError(
"The 'screen' module can't be used before the app 'ready' event");
return v8::Null(error_thrower.isolate());
}
display::Screen* screen = display::Screen::GetScreen();
if (!screen) {
error_thrower.ThrowError("Failed to get screen information");
return v8::Null(error_thrower.isolate());
}
return gin::CreateHandle(error_thrower.isolate(),
new Screen(error_thrower.isolate(), screen))
.ToV8();
}
gin::ObjectTemplateBuilder Screen::GetObjectTemplateBuilder(
v8::Isolate* isolate) {
return gin_helper::EventEmitterMixin<Screen>::GetObjectTemplateBuilder(
isolate)
.SetMethod("getCursorScreenPoint", &Screen::GetCursorScreenPoint)
.SetMethod("getPrimaryDisplay", &Screen::GetPrimaryDisplay)
.SetMethod("getAllDisplays", &Screen::GetAllDisplays)
.SetMethod("getDisplayNearestPoint", &Screen::GetDisplayNearestPoint)
#if BUILDFLAG(IS_WIN)
.SetMethod("screenToDipPoint", &display::win::ScreenWin::ScreenToDIPPoint)
.SetMethod("dipToScreenPoint", &display::win::ScreenWin::DIPToScreenPoint)
.SetMethod("screenToDipRect", &ScreenToDIPRect)
.SetMethod("dipToScreenRect", &DIPToScreenRect)
#endif
.SetMethod("getDisplayMatching", &Screen::GetDisplayMatching);
}
const char* Screen::GetTypeName() {
return "Screen";
}
} // namespace electron::api
namespace {
using electron::api::Screen;
void Initialize(v8::Local<v8::Object> exports,
v8::Local<v8::Value> unused,
v8::Local<v8::Context> context,
void* priv) {
v8::Isolate* isolate = context->GetIsolate();
gin_helper::Dictionary dict(isolate, exports);
dict.SetMethod("createScreen", base::BindRepeating(&Screen::Create));
}
} // namespace
NODE_LINKED_MODULE_CONTEXT_AWARE(electron_browser_screen, Initialize)