Rename AppView to SkyBinding.

sky/sdk/lib/app/view.dart

-// Copyright 2015 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.
-
-import 'dart:sky' as sky;
-
-import '../rendering/box.dart';
-import '../rendering/object.dart';
-import 'scheduler.dart' as scheduler;
-
-class PointerState {
-  HitTestResult result;
-  Point lastPosition;
-
-  PointerState({ this.result, this.lastPosition });
-}
-
-typedef void EventListener(sky.Event event);
-
-class AppView {
-
-  AppView({ RenderBox root: null, RenderView renderViewOverride }) {
-    assert(_app == null);
-    _app = this;
-
-    sky.view.setEventCallback(_handleEvent);
-    sky.view.setMetricsChangedCallback(_handleMetricsChanged);
-    scheduler.init();
-    scheduler.addPersistentFrameCallback(_beginFrame);
-
-    if (renderViewOverride == null) {
-      _renderView = new RenderView(child: root);
-      _renderView.attach();
-      _renderView.rootConstraints = _viewConstraints;
-      _renderView.scheduleInitialLayout();
-    } else {
-      _renderView = renderViewOverride;
-    }
-    assert(_renderView != null);
-
-    assert(_app == this);
-  }
-
-  static AppView _app; // used to enforce that we're a singleton
-
-  RenderView _renderView;
-  RenderView get renderView => _renderView;
-
-  ViewConstraints get _viewConstraints =>
-      new ViewConstraints(width: sky.view.width, height: sky.view.height);
-
-  Map<int, PointerState> _stateForPointer = new Map<int, PointerState>();
-
-  Function onFrame;
-
-  final List<EventListener> _eventListeners = new List<EventListener>();
-  void addEventListener(EventListener e) => _eventListeners.add(e);
-  bool removeEventListener(EventListener e) => _eventListeners.remove(e);
-
-  RenderBox get root => _renderView.child;
-  void set root(RenderBox value) {
-    _renderView.child = value;
-  }
-  void _beginFrame(double timeStamp) {
-    if (onFrame != null)
-      onFrame();
-    RenderObject.flushLayout();
-    _renderView.paintFrame();
-  }
-
-  void _handleEvent(sky.Event event) {
-    if (event is sky.PointerEvent) {
-      _handlePointerEvent(event);
-    } else if (event is sky.GestureEvent) {
-      HitTestResult result = new HitTestResult();
-      _renderView.hitTest(result, position: new Point(event.x, event.y));
-      dispatchEvent(event, result);
-    } else {
-      for (EventListener e in _eventListeners) {
-        e(event);
-      }
-    }
-  }
-
-  void _handleMetricsChanged() {
-    _renderView.rootConstraints = _viewConstraints;
-  }
-
-  PointerState _createStateForPointer(sky.PointerEvent event, Point position) {
-    HitTestResult result = new HitTestResult();
-    _renderView.hitTest(result, position: position);
-    PointerState state = new PointerState(result: result, lastPosition: position);
-    _stateForPointer[event.pointer] = state;
-    return state;
-  }
-
-  void _handlePointerEvent(sky.PointerEvent event) {
-    Point position = new Point(event.x, event.y);
-
-    PointerState state;
-    switch(event.type) {
-      case 'pointerdown':
-        state = _createStateForPointer(event, position);
-        break;
-      case 'pointerup':
-      case 'pointercancel':
-        state = _stateForPointer[event.pointer];
-        _stateForPointer.remove(event.pointer);
-        break;
-      case 'pointermove':
-        state = _stateForPointer[event.pointer];
-        // In the case of mouse hover we won't already have a cached down.
-        if (state == null)
-          state = _createStateForPointer(event, position);
-        break;
-    }
-    event.dx = position.x - state.lastPosition.x;
-    event.dy = position.y - state.lastPosition.y;
-    state.lastPosition = position;
-
-    dispatchEvent(event, state.result);
-  }
-
-  void dispatchEvent(sky.Event event, HitTestResult result) {
-    assert(result != null);
-    for (HitTestEntry entry in result.path.reversed)
-      entry.target.handleEvent(event, entry);
-  }
-
-  String toString() => 'Render Tree:\n${_renderView}';
-
-  void debugDumpRenderTree() {
-    toString().split('\n').forEach(print);
-  }
-  
-}