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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/linux/x11_character_injector.h"
#include <algorithm>
#include <unordered_map>
#include "base/memory/ptr_util.h"
#include "base/memory/raw_ptr.h"
#include "base/run_loop.h"
#include "base/test/task_environment.h"
#include "base/time/time.h"
#include "remoting/host/linux/x11_keyboard.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
constexpr base::TimeDelta kKeycodeReuseDuration = base::Milliseconds(100);
}
namespace remoting {
// This class acts as a simulated keyboard interface for testing that
// * Maintains a changeable simulated keyboard layout.
// * Verifies the correct sequence of characters are being typed.
// * Ensures that a key mapping can't be changed if the time elapsed since
// last used is less than |kKeycodeReuseDuration|.
class FakeX11Keyboard : public X11Keyboard {
public:
struct MappingInfo {
uint32_t code_point;
base::TimeTicks reusable_at;
};
explicit FakeX11Keyboard(const std::vector<uint32_t>& available_keycodes);
~FakeX11Keyboard() override;
// X11Keyboard overrides.
std::vector<uint32_t> GetUnusedKeycodes() override;
void PressKey(uint32_t keycode, uint32_t modifiers) override;
bool FindKeycode(uint32_t code_point,
uint32_t* keycode,
uint32_t* modifiers) override;
bool ChangeKeyMapping(uint32_t keycode, uint32_t code_point) override;
void Flush() override;
void Sync() override;
void ExpectEnterCodePoints(const std::vector<uint32_t>& sequence);
// Sets a callback to be called when the keypress expectation queue becomes
// empty.
void SetKeyPressFinishedCallback(const base::RepeatingClosure& callback) {
keypress_finished_callback_ = callback;
}
private:
std::unordered_map<uint32_t, MappingInfo> keycode_mapping_;
base::circular_deque<uint32_t> expected_code_point_sequence_;
base::RepeatingClosure keypress_finished_callback_;
};
FakeX11Keyboard::FakeX11Keyboard(
const std::vector<uint32_t>& available_keycodes) {
for (uint32_t keycode : available_keycodes) {
keycode_mapping_.insert({keycode, {0, base::TimeTicks()}});
}
}
FakeX11Keyboard::~FakeX11Keyboard() {
EXPECT_TRUE(expected_code_point_sequence_.empty());
for (const auto& pair : keycode_mapping_) {
EXPECT_EQ(0u, pair.second.code_point);
}
}
std::vector<uint32_t> FakeX11Keyboard::GetUnusedKeycodes() {
std::vector<uint32_t> keycodes;
for (const auto& pair : keycode_mapping_) {
if (!pair.second.code_point) {
keycodes.push_back(pair.first);
}
}
return keycodes;
}
void FakeX11Keyboard::PressKey(uint32_t keycode, uint32_t modifiers) {
ASSERT_FALSE(expected_code_point_sequence_.empty());
uint32_t expected_code_point = expected_code_point_sequence_.front();
auto position = keycode_mapping_.find(keycode);
ASSERT_NE(position, keycode_mapping_.end());
MappingInfo& info = position->second;
EXPECT_EQ(expected_code_point, info.code_point);
info.reusable_at = base::TimeTicks::Now() + kKeycodeReuseDuration;
expected_code_point_sequence_.pop_front();
if (expected_code_point_sequence_.empty() && keypress_finished_callback_) {
keypress_finished_callback_.Run();
}
}
bool FakeX11Keyboard::FindKeycode(uint32_t code_point,
uint32_t* keycode,
uint32_t* modifiers) {
auto position =
std::ranges::find(keycode_mapping_, code_point,
[](const std::pair<uint32_t, MappingInfo>& pair) {
return pair.second.code_point;
});
if (position == keycode_mapping_.end()) {
return false;
}
*keycode = position->first;
*modifiers = 0;
return true;
}
bool FakeX11Keyboard::ChangeKeyMapping(uint32_t keycode, uint32_t code_point) {
MappingInfo& info = keycode_mapping_[keycode];
info.code_point = code_point;
if (code_point) {
base::TimeTicks now = base::TimeTicks::Now();
EXPECT_LE(info.reusable_at, now)
<< "Attempted to reuse a keycode in less than "
<< kKeycodeReuseDuration;
info.reusable_at = now + kKeycodeReuseDuration;
} else {
info.reusable_at = base::TimeTicks();
}
return true;
}
void FakeX11Keyboard::Flush() {}
void FakeX11Keyboard::Sync() {}
void FakeX11Keyboard::ExpectEnterCodePoints(
const std::vector<uint32_t>& sequence) {
expected_code_point_sequence_.insert(expected_code_point_sequence_.end(),
sequence.begin(), sequence.end());
}
class X11CharacterInjectorTest : public testing::Test {
public:
void SetUp() override;
void TearDown() override;
protected:
// Injects the characters sequentially, verifies the sequence of characters
// being injected are correct, and runs the message loop until all
// characters are injected.
void InjectAndRun(const std::vector<uint32_t>& code_points);
std::unique_ptr<X11CharacterInjector> injector_;
raw_ptr<FakeX11Keyboard, DanglingUntriaged>
keyboard_; // Owned by |injector_|.
base::test::SingleThreadTaskEnvironment task_environment_;
};
void X11CharacterInjectorTest::SetUp() {
keyboard_ = new FakeX11Keyboard({55, 54, 53, 52, 51});
injector_.reset(new X11CharacterInjector(base::WrapUnique(keyboard_.get())));
}
void X11CharacterInjectorTest::TearDown() {
injector_.reset();
}
void X11CharacterInjectorTest::InjectAndRun(
const std::vector<uint32_t>& code_points) {
base::RunLoop run_loop;
keyboard_->SetKeyPressFinishedCallback(run_loop.QuitClosure());
for (uint32_t code_point : code_points) {
injector_->Inject(code_point);
}
keyboard_->ExpectEnterCodePoints(code_points);
run_loop.Run();
}
TEST_F(X11CharacterInjectorTest, TestNoMappingNoExpectation) {}
TEST_F(X11CharacterInjectorTest, TestTypeOneCharacter) {
InjectAndRun({123});
}
TEST_F(X11CharacterInjectorTest, TestMapCharactersUntilFull) {
InjectAndRun({1, 2, 3, 4, 5});
}
TEST_F(X11CharacterInjectorTest, TestMapOneCharacterWhenFull) {
InjectAndRun({1, 2, 3, 4, 5, 6});
}
TEST_F(X11CharacterInjectorTest, TestReuseMappedCharacterOnce) {
InjectAndRun({1, 2, 3, 4, 5});
InjectAndRun({1, 6});
}
TEST_F(X11CharacterInjectorTest, TestReuseAllMappedCharactersInChangedOrder) {
InjectAndRun({1, 2, 3, 4, 5});
InjectAndRun({2, 4, 5, 1, 3});
InjectAndRun({31, 32, 33, 34, 35});
}
} // namespace remoting
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