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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/ozone/platform/headless/headless_screen.h"
#include <string_view>
#include <vector>
#include "base/check_deref.h"
#include "base/command_line.h"
#include "base/containers/flat_set.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "components/headless/display_util/headless_display_util.h"
#include "components/headless/screen_info/headless_screen_info.h"
#include "ui/display/util/display_util.h"
#include "ui/gfx/switches.h"
#include "ui/ozone/platform/headless/headless_window.h"
#include "ui/ozone/platform/headless/headless_window_manager.h"
#include "ui/ozone/platform/headless/ozone_platform_headless.h"
#include "ui/ozone/public/ozone_platform.h"
#include "ui/ozone/public/ozone_switches.h"
using headless::HeadlessScreenInfo;
namespace ui {
namespace {
// By default headless screen has 1x1 size and 1.0 scale factor. Headless
// screen size can be overridden using --ozone-override-screen-size switch.
//
// More complex headless screen configuration (including multiple screens)
// can be specified using the --screen-info command line switch.
// See //components/headless/screen_info/README.md for more details.
// Ozone/headless display defaults.
constexpr int64_t kHeadlessDisplayIdBase = 1;
constexpr float kHeadlessDisplayScale = 1.0f;
constexpr gfx::Size kHeadlessDisplaySize(1, 1);
// Parse comma-separated screen width and height.
bool ParseScreenSize(const std::string& screen_size, int* width, int* height) {
std::vector<std::string_view> width_and_height = base::SplitStringPiece(
screen_size, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
if (width_and_height.size() != 2)
return false;
if (!base::StringToInt(width_and_height[0], width) ||
!base::StringToInt(width_and_height[1], height)) {
return false;
}
return true;
}
gfx::Rect GetHeadlessDisplayBounds() {
gfx::Rect bounds(kHeadlessDisplaySize);
const base::CommandLine& command_line =
CHECK_DEREF(base::CommandLine::ForCurrentProcess());
if (command_line.HasSwitch(switches::kOzoneOverrideScreenSize)) {
int width, height;
std::string screen_size =
command_line.GetSwitchValueASCII(switches::kOzoneOverrideScreenSize);
if (ParseScreenSize(screen_size, &width, &height)) {
bounds.set_size(gfx::Size(width, height));
}
}
return bounds;
}
std::vector<HeadlessScreenInfo> GetScreenInfo() {
std::vector<HeadlessScreenInfo> screen_info;
const base::CommandLine& command_line =
CHECK_DEREF(base::CommandLine::ForCurrentProcess());
if (command_line.HasSwitch(switches::kScreenInfo)) {
const std::string switch_value =
command_line.GetSwitchValueASCII(switches::kScreenInfo);
auto screen_info_or_error = HeadlessScreenInfo::FromString(switch_value);
CHECK(screen_info_or_error.has_value()) << screen_info_or_error.error();
screen_info = screen_info_or_error.value();
} else {
screen_info.push_back(
HeadlessScreenInfo({.bounds = GetHeadlessDisplayBounds(),
.device_pixel_ratio = kHeadlessDisplayScale}));
}
return screen_info;
}
HeadlessWindowManager& GetWindowManager() {
OzonePlatformHeadless* ozone_platform_headless =
static_cast<OzonePlatformHeadless*>(OzonePlatform::GetInstance());
HeadlessWindowManager& window_manager =
CHECK_DEREF(ozone_platform_headless->GetHeadlessWindowManager());
return window_manager;
}
} // namespace
HeadlessScreen::HeadlessScreen() : window_manager_(GetWindowManager()) {
CreateDisplayList();
}
HeadlessScreen::~HeadlessScreen() = default;
void HeadlessScreen::CreateDisplayList() {
std::vector<HeadlessScreenInfo> screen_info = GetScreenInfo();
base::flat_set<int64_t> internal_display_ids;
display::DisplayList::Type type = display::DisplayList::Type::PRIMARY;
for (const auto& it : screen_info) {
static int64_t synthesized_display_id = kHeadlessDisplayIdBase;
display::Display display(synthesized_display_id++);
display.set_label(it.label);
display.set_color_depth(it.color_depth);
display.SetScaleAndBounds(it.device_pixel_ratio, it.bounds);
if (!it.work_area_insets.IsEmpty()) {
display.UpdateWorkAreaFromInsets(it.work_area_insets);
}
if (it.rotation) {
CHECK(display::Display::IsValidRotation(it.rotation));
display.SetRotationAsDegree(it.rotation);
}
if (it.is_internal) {
internal_display_ids.insert(display.id());
}
is_natural_landscape_map_.insert({display.id(), display.is_landscape()});
display_list_.AddDisplay(display, type);
type = display::DisplayList::Type::NOT_PRIMARY;
}
display::SetInternalDisplayIds(std::move(internal_display_ids));
}
const std::vector<display::Display>& HeadlessScreen::GetAllDisplays() const {
return display_list_.displays();
}
display::Display HeadlessScreen::GetPrimaryDisplay() const {
auto iter = display_list_.GetPrimaryDisplayIterator();
CHECK(iter != display_list_.displays().end());
return *iter;
}
display::Display HeadlessScreen::GetDisplayForAcceleratedWidget(
gfx::AcceleratedWidget widget) const {
if (HeadlessWindow* window = window_manager_->GetWindow(widget)) {
gfx::Rect bounds = window->GetBoundsInPixels();
return GetDisplayMatching(bounds);
}
return GetPrimaryDisplay();
}
gfx::Point HeadlessScreen::GetCursorScreenPoint() const {
return gfx::Point();
}
gfx::AcceleratedWidget HeadlessScreen::GetAcceleratedWidgetAtScreenPoint(
const gfx::Point& point) const {
return window_manager_->GetAcceleratedWidgetAtScreenPoint(point);
}
display::Display HeadlessScreen::GetDisplayNearestPoint(
const gfx::Point& point) const {
if (auto display =
headless::GetDisplayFromScreenPoint(GetAllDisplays(), point)) {
return display.value();
}
return GetPrimaryDisplay();
}
display::Display HeadlessScreen::GetDisplayMatching(
const gfx::Rect& match_rect) const {
if (auto display =
headless::GetDisplayFromScreenRect(GetAllDisplays(), match_rect)) {
return display.value();
}
return GetPrimaryDisplay();
}
void HeadlessScreen::AddObserver(display::DisplayObserver* observer) {
display_list_.AddObserver(observer);
}
void HeadlessScreen::RemoveObserver(display::DisplayObserver* observer) {
display_list_.RemoveObserver(observer);
}
} // namespace ui
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