50bfdedbf4
Sadly, box.dart has grown much longer than 1000 lines. This patch splits it up into several files based on the class hierarchy. Fortunately, many of these classes are loosely coupled to each other.
116 lines
3.4 KiB
Dart
116 lines
3.4 KiB
Dart
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:sky' as sky;
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import 'package:sky/rendering/layer.dart';
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import 'package:sky/rendering/object.dart';
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import 'package:sky/rendering/box.dart';
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import 'package:vector_math/vector_math.dart';
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class ViewConstraints {
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const ViewConstraints({
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this.size: Size.zero,
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this.orientation
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});
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final Size size;
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final int orientation;
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}
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class RenderView extends RenderObject with RenderObjectWithChildMixin<RenderBox> {
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RenderView({
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RenderBox child,
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this.timeForRotation: const Duration(microseconds: 83333)
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}) {
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this.child = child;
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}
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Size _size = Size.zero;
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Size get size => _size;
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int _orientation; // 0..3
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int get orientation => _orientation;
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Duration timeForRotation;
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ViewConstraints _rootConstraints;
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ViewConstraints get rootConstraints => _rootConstraints;
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void set rootConstraints(ViewConstraints value) {
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if (_rootConstraints == value)
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return;
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_rootConstraints = value;
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markNeedsLayout();
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}
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ContainerLayer _rootLayer;
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// We never call layout() on this class, so this should never get
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// checked. (This class is laid out using scheduleInitialLayout().)
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bool debugDoesMeetConstraints() { assert(false); return false; }
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void performResize() {
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assert(false);
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}
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void performLayout() {
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if (_rootConstraints.orientation != _orientation) {
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if (_orientation != null && child != null)
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child.rotate(oldAngle: _orientation, newAngle: _rootConstraints.orientation, time: timeForRotation);
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_orientation = _rootConstraints.orientation;
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}
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_size = _rootConstraints.size;
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assert(!_size.isInfinite);
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if (child != null)
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child.layout(new BoxConstraints.tight(_size));
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}
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void rotate({ int oldAngle, int newAngle, Duration time }) {
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assert(false); // nobody tells the screen to rotate, the whole rotate() dance is started from our performResize()
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}
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bool hitTest(HitTestResult result, { Point position }) {
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if (child != null) {
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Rect childBounds = Point.origin & child.size;
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if (childBounds.contains(position))
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child.hitTest(result, position: position);
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}
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result.add(new HitTestEntry(this));
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return true;
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}
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void paint(PaintingContext context, Offset offset) {
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if (child != null)
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context.paintChild(child, offset.toPoint());
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}
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void paintFrame() {
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sky.tracing.begin('RenderView.paintFrame');
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try {
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final double devicePixelRatio = sky.view.devicePixelRatio;
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Matrix4 transform = new Matrix4.diagonal3Values(devicePixelRatio, devicePixelRatio, 1.0);
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_rootLayer = new TransformLayer(transform: transform);
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PaintingContext context = new PaintingContext(Offset.zero, size);
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_rootLayer.add(context.layer);
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context.paintChild(child, Point.origin);
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context.endRecording();
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} finally {
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sky.tracing.end('RenderView.paintFrame');
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}
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}
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void compositeFrame() {
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sky.tracing.begin('RenderView.compositeFrame');
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try {
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sky.PictureRecorder recorder = new sky.PictureRecorder();
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sky.Canvas canvas = new sky.Canvas(recorder, Point.origin & (size * sky.view.devicePixelRatio));
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_rootLayer.paint(canvas);
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sky.view.picture = recorder.endRecording();
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} finally {
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sky.tracing.end('RenderView.compositeFrame');
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}
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}
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Rect get paintBounds => Point.origin & size;
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}
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