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// Copyright 2018 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 "components/exo/shell_surface_util.h"
#include <memory>
#include "ash/public/cpp/app_types.h"
#include "base/strings/string_number_conversions.h"
#include "base/trace_event/trace_event.h"
#include "components/exo/permission.h"
#include "components/exo/shell_surface_base.h"
#include "components/exo/surface.h"
#include "components/exo/wm_helper.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/client/capture_client.h"
#include "ui/aura/window.h"
#include "ui/aura/window_delegate.h"
#include "ui/aura/window_targeter.h"
#include "ui/events/event.h"
#include "ui/views/widget/widget.h"
#include "ui/wm/core/window_util.h"
DEFINE_UI_CLASS_PROPERTY_TYPE(exo::Permission*)
namespace exo {
namespace {
DEFINE_UI_CLASS_PROPERTY_KEY(Surface*, kMainSurfaceKey, nullptr)
// Application Id set by the client.
DEFINE_OWNED_UI_CLASS_PROPERTY_KEY(std::string, kApplicationIdKey, nullptr)
// Startup Id set by the client.
DEFINE_OWNED_UI_CLASS_PROPERTY_KEY(std::string, kStartupIdKey, nullptr)
// Accessibility Id set by the client.
DEFINE_UI_CLASS_PROPERTY_KEY(int32_t, kClientAccessibilityIdKey, -1)
// Permission object allowing this window to activate itself.
DEFINE_UI_CLASS_PROPERTY_KEY(exo::Permission*, kPermissionKey, nullptr)
// Returns true if the component for a located event should be taken care of
// by the window system.
bool ShouldHTComponentBlocked(int component) {
switch (component) {
case HTCAPTION:
case HTCLOSE:
case HTMAXBUTTON:
case HTMINBUTTON:
case HTMENU:
case HTSYSMENU:
return true;
default:
return false;
}
}
// Find the lowest targeter in the parent chain.
aura::WindowTargeter* FindTargeter(ui::EventTarget* target) {
do {
ui::EventTargeter* targeter = target->GetEventTargeter();
if (targeter)
return static_cast<aura::WindowTargeter*>(targeter);
target = target->GetParentTarget();
} while (target);
return nullptr;
}
} // namespace
void SetShellApplicationId(aura::Window* window,
const base::Optional<std::string>& id) {
TRACE_EVENT1("exo", "SetApplicationId", "application_id", id ? *id : "null");
if (id)
window->SetProperty(kApplicationIdKey, *id);
else
window->ClearProperty(kApplicationIdKey);
}
const std::string* GetShellApplicationId(const aura::Window* window) {
return window->GetProperty(kApplicationIdKey);
}
void SetArcAppType(aura::Window* window) {
window->SetProperty(aura::client::kAppType,
static_cast<int>(ash::AppType::ARC_APP));
}
void SetShellStartupId(aura::Window* window,
const base::Optional<std::string>& id) {
TRACE_EVENT1("exo", "SetStartupId", "startup_id", id ? *id : "null");
if (id)
window->SetProperty(kStartupIdKey, *id);
else
window->ClearProperty(kStartupIdKey);
}
const std::string* GetShellStartupId(aura::Window* window) {
return window->GetProperty(kStartupIdKey);
}
void SetShellClientAccessibilityId(aura::Window* window,
const base::Optional<int32_t>& id) {
TRACE_EVENT1("exo", "SetClientAccessibilityId", "id",
id ? base::NumberToString(*id) : "null");
if (id)
window->SetProperty(kClientAccessibilityIdKey, *id);
else
window->ClearProperty(kClientAccessibilityIdKey);
}
const base::Optional<int32_t> GetShellClientAccessibilityId(
aura::Window* window) {
auto id = window->GetProperty(kClientAccessibilityIdKey);
if (id < 0)
return base::nullopt;
else
return id;
}
void SetShellMainSurface(aura::Window* window, Surface* surface) {
window->SetProperty(kMainSurfaceKey, surface);
}
Surface* GetShellMainSurface(const aura::Window* window) {
return window->GetProperty(kMainSurfaceKey);
}
ShellSurfaceBase* GetShellSurfaceBaseForWindow(aura::Window* window) {
// Only windows with a surface can have a shell surface.
if (!GetShellMainSurface(window))
return nullptr;
views::Widget* widget = views::Widget::GetWidgetForNativeWindow(window);
if (!widget)
return nullptr;
return static_cast<ShellSurfaceBase*>(widget->widget_delegate());
}
Surface* GetTargetSurfaceForLocatedEvent(
const ui::LocatedEvent* original_event) {
aura::Window* window =
WMHelper::GetInstance()->GetCaptureClient()->GetCaptureWindow();
if (!window) {
return Surface::AsSurface(
static_cast<aura::Window*>(original_event->target()));
}
Surface* main_surface = GetShellMainSurface(window);
// Skip if the event is captured by non exo windows.
if (!main_surface) {
auto* widget = views::Widget::GetTopLevelWidgetForNativeView(window);
if (!widget)
return nullptr;
main_surface = GetShellMainSurface(widget->GetNativeWindow());
if (!main_surface)
return nullptr;
}
DCHECK_EQ(window, static_cast<aura::Window*>(original_event->target()));
// Create a clone of the event as targeter may update it during the
// search.
auto cloned = ui::Event::Clone(*original_event);
ui::LocatedEvent* event = cloned->AsLocatedEvent();
while (true) {
gfx::PointF location_in_target_f = event->location_f();
gfx::Point location_in_target = event->location();
ui::EventTarget* event_target = window;
aura::WindowTargeter* targeter = FindTargeter(event_target);
DCHECK(targeter);
aura::Window* focused =
static_cast<aura::Window*>(targeter->FindTargetForEvent(window, event));
if (focused) {
Surface* surface = Surface::AsSurface(focused);
if (focused != window)
return surface;
else if (surface && surface->HitTest(location_in_target)) {
// If the targeting fallback to the root (first) window, test the
// hit region again.
return surface;
}
}
// If the event falls into the place where the window system should care
// about (i.e. window caption), do not check the transient parent but just
// return nullptr. See b/149517682.
if (window->delegate() &&
ShouldHTComponentBlocked(
window->delegate()->GetNonClientComponent(location_in_target))) {
return nullptr;
}
aura::Window* parent_window = wm::GetTransientParent(window);
if (!parent_window)
return main_surface;
event->set_location_f(location_in_target_f);
event_target->ConvertEventToTarget(parent_window, event);
window = parent_window;
}
}
namespace {
// An activation-permission object whose lifetime is tied to a window property.
class ScopedWindowActivationPermission : public Permission {
public:
ScopedWindowActivationPermission(aura::Window* window,
base::TimeDelta timeout)
: Permission(Permission::Capability::kActivate, timeout),
window_(window) {
Permission* other = window_->GetProperty(kPermissionKey);
if (other) {
other->Revoke();
}
window_->SetProperty(kPermissionKey, reinterpret_cast<Permission*>(this));
}
~ScopedWindowActivationPermission() override {
if (window_->GetProperty(kPermissionKey) == this)
window_->ClearProperty(kPermissionKey);
}
private:
aura::Window* window_;
};
} // namespace
std::unique_ptr<Permission> GrantPermissionToActivate(aura::Window* window,
base::TimeDelta timeout) {
return std::make_unique<ScopedWindowActivationPermission>(window, timeout);
}
bool HasPermissionToActivate(aura::Window* window) {
Permission* permission = window->GetProperty(kPermissionKey);
return permission && permission->Check(Permission::Capability::kActivate);
}
} // namespace exo
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