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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/accessibility/drag_event_rewriter.h"
#include <memory>
#include "ash/accessibility/test_event_recorder.h"
#include "ash/test/ash_test_base.h"
#include "base/memory/raw_ptr.h"
#include "ui/aura/window.h"
#include "ui/aura/window_tree_host.h"
#include "ui/events/base_event_utils.h"
#include "ui/events/event_rewriter.h"
#include "ui/events/event_sink.h"
#include "ui/events/keycodes/keyboard_codes.h"
#include "ui/events/test/event_generator.h"
#include "ui/events/test/test_event_source.h"
namespace ash {
namespace {
// EventSink that saves a copy of the most recent event.
class CopyingSink : public ui::EventSink {
public:
CopyingSink() {}
~CopyingSink() override = default;
ui::Event* last_event() const { return last_event_.get(); }
// EventSink override:
ui::EventDispatchDetails OnEventFromSource(ui::Event* event) override {
last_event_ = event->Clone();
ui::Event::DispatcherApi(last_event_.get()).set_target(event->target());
return ui::EventDispatchDetails();
}
private:
std::unique_ptr<ui::Event> last_event_;
};
} // anonymous namespace
class DragEventRewriterTest : public AshTestBase {
public:
DragEventRewriterTest() = default;
DragEventRewriterTest(const DragEventRewriterTest&) = delete;
DragEventRewriterTest& operator=(const DragEventRewriterTest&) = delete;
~DragEventRewriterTest() override = default;
void SetUp() override {
AshTestBase::SetUp();
generator_ = AshTestBase::GetEventGenerator();
GetContext()->GetHost()->GetEventSource()->AddEventRewriter(
&drag_event_rewriter_);
GetContext()->GetHost()->GetEventSource()->AddEventRewriter(
&event_recorder_);
}
void TearDown() override {
GetContext()->GetHost()->GetEventSource()->RemoveEventRewriter(
&event_recorder_);
GetContext()->GetHost()->GetEventSource()->RemoveEventRewriter(
&drag_event_rewriter_);
generator_ = nullptr;
AshTestBase::TearDown();
}
protected:
// Generates ui::Events from simulated user input.
raw_ptr<ui::test::EventGenerator> generator_ = nullptr;
// Records events delivered to the next event rewriter after
// DragEventRewriter.
TestEventRecorder event_recorder_;
DragEventRewriter drag_event_rewriter_;
};
TEST_F(DragEventRewriterTest, EventsNotConsumedWhenDisabled) {
drag_event_rewriter_.SetEnabled(false);
// Events are not consume.
generator_->PressKey(ui::VKEY_A, ui::EF_NONE);
EXPECT_EQ(1U, event_recorder_.recorded_event_count());
generator_->ReleaseKey(ui::VKEY_A, ui::EF_NONE);
EXPECT_EQ(2U, event_recorder_.recorded_event_count());
generator_->PressLeftButton();
EXPECT_EQ(3U, event_recorder_.recorded_event_count());
EXPECT_EQ(ui::EventType::kMousePressed,
event_recorder_.last_recorded_event_type());
generator_->MoveMouseTo(gfx::Point(200, 200), 1);
EXPECT_EQ(4U, event_recorder_.recorded_event_count());
EXPECT_EQ(ui::EventType::kMouseDragged,
event_recorder_.last_recorded_event_type());
generator_->ReleaseLeftButton();
EXPECT_EQ(5U, event_recorder_.recorded_event_count());
EXPECT_EQ(ui::EventType::kMouseReleased,
event_recorder_.last_recorded_event_type());
// Move events are not consumed either.
generator_->MoveMouseTo(gfx::Point(100, 100), 1);
EXPECT_EQ(6U, event_recorder_.recorded_event_count());
EXPECT_EQ(ui::EventType::kMouseMoved,
event_recorder_.last_recorded_event_type());
}
TEST_F(DragEventRewriterTest, OnlyMouseMoveEventsConsumedWhenEnabled) {
drag_event_rewriter_.SetEnabled(true);
// Most events are still not consumed.
generator_->PressKey(ui::VKEY_A, ui::EF_NONE);
EXPECT_EQ(1U, event_recorder_.recorded_event_count());
generator_->ReleaseKey(ui::VKEY_A, ui::EF_NONE);
EXPECT_EQ(2U, event_recorder_.recorded_event_count());
generator_->PressLeftButton();
EXPECT_EQ(3U, event_recorder_.recorded_event_count());
EXPECT_EQ(ui::EventType::kMousePressed,
event_recorder_.last_recorded_event_type());
generator_->MoveMouseTo(gfx::Point(200, 200), 1);
EXPECT_EQ(4U, event_recorder_.recorded_event_count());
EXPECT_EQ(ui::EventType::kMouseDragged,
event_recorder_.last_recorded_event_type());
generator_->ReleaseLeftButton();
EXPECT_EQ(5U, event_recorder_.recorded_event_count());
EXPECT_EQ(ui::EventType::kMouseReleased,
event_recorder_.last_recorded_event_type());
// Mouse move events are consumed and changed into drag events.
generator_->MoveMouseTo(gfx::Point(100, 100), 1);
EXPECT_EQ(5U, event_recorder_.recorded_event_count());
generator_->MoveMouseTo(gfx::Point(150, 150), 1);
EXPECT_EQ(5U, event_recorder_.recorded_event_count());
}
TEST_F(DragEventRewriterTest, RewritesMouseMovesToDrags) {
drag_event_rewriter_.SetEnabled(true);
base::TimeTicks time_stamp = ui::EventTimeForNow();
gfx::Point location(100, 100);
gfx::Point root_location(150, 150);
int flags = ui::EF_SHIFT_DOWN; // Set a random flag.
int changed_button_flags = ui::EF_LEFT_MOUSE_BUTTON; // Set a random flag.
ui::MouseEvent event(ui::EventType::kMouseMoved, location, root_location,
time_stamp, flags, changed_button_flags);
auto window = CreateToplevelTestWindow(gfx::Rect(50, 50, 400, 300),
/*shell_window_id=*/0);
ASSERT_NE(window.get(), nullptr);
ui::Event::DispatcherApi(&event).set_target(window.get());
CopyingSink sink;
ui::test::TestEventSource source(&sink);
source.AddEventRewriter(&drag_event_rewriter_);
source.Send(&event);
source.RemoveEventRewriter(&drag_event_rewriter_);
ui::Event* rewritten_event = sink.last_event();
// The type should be a drag.
ASSERT_EQ(ui::EventType::kMouseDragged, rewritten_event->type());
// Flags should include left mouse button.
EXPECT_EQ(flags | ui::EF_LEFT_MOUSE_BUTTON, rewritten_event->flags());
// Original event target should be honored.
EXPECT_EQ(window.get(), rewritten_event->target());
// Everything else should be the same as the original.
ui::MouseEvent* rewritten_mouse_event = rewritten_event->AsMouseEvent();
EXPECT_EQ(location, rewritten_mouse_event->location());
EXPECT_EQ(root_location, rewritten_mouse_event->root_location());
EXPECT_EQ(time_stamp, rewritten_mouse_event->time_stamp());
EXPECT_EQ(changed_button_flags,
rewritten_mouse_event->changed_button_flags());
}
} // namespace ash
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