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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 "ui/events/event_target.h"
- #include "testing/gtest/include/gtest/gtest.h"
- #include "ui/events/test/events_test_utils.h"
- #include "ui/events/test/test_event_handler.h"
- #include "ui/events/test/test_event_processor.h"
- #include "ui/events/test/test_event_target.h"
- namespace ui {
- namespace {
- TEST(EventTargetTest, AddsAndRemovesHandlers) {
- test::TestEventTarget target;
- EventTargetTestApi test_api(&target);
- test::TestEventHandler handler;
- EventHandlerList list;
- // Try at the default priority
- target.AddPreTargetHandler(&handler);
- list = test_api.GetPreTargetHandlers();
- ASSERT_EQ(1u, list.size());
- target.RemovePreTargetHandler(&handler);
- list = test_api.GetPreTargetHandlers();
- ASSERT_EQ(0u, list.size());
- // Try at a different priority
- target.AddPreTargetHandler(&handler, EventTarget::Priority::kAccessibility);
- list = test_api.GetPreTargetHandlers();
- ASSERT_EQ(1u, list.size());
- target.RemovePreTargetHandler(&handler);
- list = test_api.GetPreTargetHandlers();
- ASSERT_EQ(0u, list.size());
- // Doesn't crash if we remove a handler that doesn't exist.
- target.RemovePreTargetHandler(&handler);
- }
- TEST(EventTargetTest, HandlerOrdering) {
- test::TestEventTarget target;
- EventTargetTestApi test_api(&target);
- test::TestEventHandler default_handler;
- test::TestEventHandler system_handler;
- test::TestEventHandler a11y_handler;
- EventHandlerList list;
- // Try adding default then system then a11y, which is backwards of the
- // desired order.
- target.AddPreTargetHandler(&default_handler, EventTarget::Priority::kDefault);
- target.AddPreTargetHandler(&system_handler, EventTarget::Priority::kSystem);
- target.AddPreTargetHandler(&a11y_handler,
- EventTarget::Priority::kAccessibility);
- list = test_api.GetPreTargetHandlers();
- ASSERT_EQ(3u, list.size());
- EXPECT_EQ(list[0], &a11y_handler);
- EXPECT_EQ(list[1], &system_handler);
- EXPECT_EQ(list[2], &default_handler);
- target.RemovePreTargetHandler(&default_handler);
- target.RemovePreTargetHandler(&system_handler);
- target.RemovePreTargetHandler(&a11y_handler);
- }
- TEST(EventTargetTest, HandlerOrderingComplex) {
- test::TestEventTarget target;
- EventTargetTestApi test_api(&target);
- test::TestEventHandler default_handler_1;
- test::TestEventHandler default_handler_2;
- test::TestEventHandler system_handler_1;
- test::TestEventHandler system_handler_2;
- test::TestEventHandler system_handler_3;
- test::TestEventHandler a11y_handler_1;
- test::TestEventHandler a11y_handler_2;
- EventHandlerList list;
- // Adding a new system or accessibility handler will insert it before others
- // of its type. Adding a new default handler puts it at the end of the list,
- // for historical reasons. Re-arranging default handlers causes test failures
- // in many unittests and may also cause real-life bugs, so for now default
- // still is at the end of the list.
- target.AddPreTargetHandler(&system_handler_3, EventTarget::Priority::kSystem);
- target.AddPreTargetHandler(&default_handler_1,
- EventTarget::Priority::kDefault);
- target.AddPreTargetHandler(&system_handler_2, EventTarget::Priority::kSystem);
- target.AddPreTargetHandler(&a11y_handler_2,
- EventTarget::Priority::kAccessibility);
- target.AddPreTargetHandler(&system_handler_1, EventTarget::Priority::kSystem);
- target.AddPreTargetHandler(&default_handler_2,
- EventTarget::Priority::kDefault);
- target.AddPreTargetHandler(&a11y_handler_1,
- EventTarget::Priority::kAccessibility);
- list = test_api.GetPreTargetHandlers();
- ASSERT_EQ(7u, list.size());
- EXPECT_EQ(list[0], &a11y_handler_1);
- EXPECT_EQ(list[1], &a11y_handler_2);
- EXPECT_EQ(list[2], &system_handler_1);
- EXPECT_EQ(list[3], &system_handler_2);
- EXPECT_EQ(list[4], &system_handler_3);
- EXPECT_EQ(list[5], &default_handler_1);
- EXPECT_EQ(list[6], &default_handler_2);
- target.RemovePreTargetHandler(&system_handler_3);
- target.RemovePreTargetHandler(&default_handler_1);
- target.RemovePreTargetHandler(&system_handler_2);
- target.RemovePreTargetHandler(&a11y_handler_2);
- target.RemovePreTargetHandler(&system_handler_1);
- target.RemovePreTargetHandler(&default_handler_2);
- target.RemovePreTargetHandler(&a11y_handler_1);
- }
- TEST(EventTargetTest, HandlerOrderingAcrossEventTargets) {
- // Child needs to be a unique pointer so that TestEventTarget::AddChild works.
- std::unique_ptr<test::TestEventTarget> child =
- std::make_unique<test::TestEventTarget>();
- test::TestEventTarget parent;
- test::TestEventHandler default_handler_1;
- test::TestEventHandler default_handler_2;
- test::TestEventHandler default_handler_3;
- test::TestEventHandler system_handler_1;
- test::TestEventHandler system_handler_2;
- test::TestEventHandler system_handler_3;
- test::TestEventHandler a11y_handler_1;
- test::TestEventHandler a11y_handler_2;
- test::TestEventHandler a11y_handler_3;
- // Parent handlers should be called before children handlers.
- parent.AddPreTargetHandler(&default_handler_1,
- EventTarget::Priority::kDefault);
- parent.AddPreTargetHandler(&system_handler_2, EventTarget::Priority::kSystem);
- parent.AddPreTargetHandler(&a11y_handler_2,
- EventTarget::Priority::kAccessibility);
- child->AddPreTargetHandler(&default_handler_3,
- EventTarget::Priority::kDefault);
- child->AddPreTargetHandler(&a11y_handler_3,
- EventTarget::Priority::kAccessibility);
- child->AddPreTargetHandler(&system_handler_3, EventTarget::Priority::kSystem);
- parent.AddPreTargetHandler(&system_handler_1, EventTarget::Priority::kSystem);
- parent.AddPreTargetHandler(&default_handler_2,
- EventTarget::Priority::kDefault);
- parent.AddPreTargetHandler(&a11y_handler_1,
- EventTarget::Priority::kAccessibility);
- // Connect the parent and child in a EventTargetTestAPI.
- EventTargetTestApi test_api(child.get());
- test::TestEventTarget* child_ptr = child.get();
- parent.AddChild(std::move(child));
- EventHandlerList list;
- list = test_api.GetPreTargetHandlers();
- ASSERT_EQ(9u, list.size());
- // Parent handlers are called before child handlers, so a11y_handler_1 and
- // 2 should be called before a11y_handler3, and similarly all the system and
- // default handlers added to the parent should be called before those added
- // to the child.
- // In addition, all a11y handlers should be called before all system handlers,
- // which should be called before all default handlers.
- EXPECT_EQ(list[0], &a11y_handler_1);
- EXPECT_EQ(list[1], &a11y_handler_2);
- EXPECT_EQ(list[2], &a11y_handler_3);
- EXPECT_EQ(list[3], &system_handler_1);
- EXPECT_EQ(list[4], &system_handler_2);
- EXPECT_EQ(list[5], &system_handler_3);
- EXPECT_EQ(list[6], &default_handler_1);
- EXPECT_EQ(list[7], &default_handler_2);
- EXPECT_EQ(list[8], &default_handler_3);
- parent.RemovePreTargetHandler(&default_handler_1);
- parent.RemovePreTargetHandler(&system_handler_2);
- parent.RemovePreTargetHandler(&a11y_handler_2);
- child_ptr->RemovePreTargetHandler(&default_handler_3);
- child_ptr->RemovePreTargetHandler(&a11y_handler_3);
- child_ptr->RemovePreTargetHandler(&system_handler_3);
- parent.RemovePreTargetHandler(&system_handler_1);
- parent.RemovePreTargetHandler(&default_handler_2);
- parent.RemovePreTargetHandler(&a11y_handler_1);
- }
- } // namespace
- } // namespace ui
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