blob: eb81870be9c7cb794dd68be9a455304bbd7cc1a5 [file] [log] [blame]
// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'dart:ui' as ui;
import 'package:flutter/foundation.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/scheduler.dart';
import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart' show TestDefaultBinaryMessengerBinding;
class _TestHitTester extends RenderBox {
final BoxHitTest hitTestOverride;
bool hitTest(BoxHitTestResult result, {required ui.Offset position}) {
return hitTestOverride(result, position);
// A binding used to test MouseTracker, allowing the test to override hit test
// searching.
class TestMouseTrackerFlutterBinding extends BindingBase
with SchedulerBinding, ServicesBinding, GestureBinding, SemanticsBinding, RendererBinding, TestDefaultBinaryMessengerBinding {
void initInstances() {
postFrameCallbacks = <void Function(Duration)>[];
late final RenderView _renderView = RenderView(
view: platformDispatcher.implicitView!,
late final PipelineOwner _pipelineOwner = PipelineOwner(
onSemanticsUpdate: (ui.SemanticsUpdate _) { assert(false); },
void setHitTest(BoxHitTest hitTest) {
if (_pipelineOwner.rootNode == null) {
_pipelineOwner.rootNode = _renderView;
_renderView.child = _TestHitTester(hitTest);
SchedulerPhase? _overridePhase;
SchedulerPhase get schedulerPhase => _overridePhase ?? super.schedulerPhase;
// Manually schedule a post-frame check.
// In real apps this is done by the renderer binding, but in tests we have to
// bypass the phase assertion of [MouseTracker.schedulePostFrameCheck].
void scheduleMouseTrackerPostFrameCheck() {
final SchedulerPhase? lastPhase = _overridePhase;
_overridePhase = SchedulerPhase.persistentCallbacks;
addPostFrameCallback((_) {
_overridePhase = lastPhase;
List<void Function(Duration)> postFrameCallbacks = <void Function(Duration)>[];
// Proxy post-frame callbacks.
void addPostFrameCallback(void Function(Duration) callback) {
void flushPostFrameCallbacks(Duration duration) {
for (final void Function(Duration) callback in postFrameCallbacks) {
// An object that mocks the behavior of a render object with [MouseTrackerAnnotation].
class TestAnnotationTarget with Diagnosticable implements MouseTrackerAnnotation, HitTestTarget {
const TestAnnotationTarget({this.onEnter, this.onHover, this.onExit, this.cursor = MouseCursor.defer, this.validForMouseTracker = true});
final PointerEnterEventListener? onEnter;
final PointerHoverEventListener? onHover;
final PointerExitEventListener? onExit;
final MouseCursor cursor;
final bool validForMouseTracker;
void handleEvent(PointerEvent event, HitTestEntry entry) {
if (event is PointerHoverEvent) {
// A hit test entry that can be assigned with a [TestAnnotationTarget] and an
// optional transform matrix.
class TestAnnotationEntry extends HitTestEntry<TestAnnotationTarget> {
TestAnnotationEntry(, [Matrix4? transform])
: transform = transform ?? Matrix4.identity();
final Matrix4 transform;