Make Sky's EditableText mostly work

sky/examples/editor/input.dart

Index: sky/examples/editor/input.dart
diff --git a/sky/examples/editor/input.dart b/sky/examples/editor/input.dart
deleted file mode 100644
index 8508a7ce2fab79d0b54c920ae87e5919c6af58e4..0000000000000000000000000000000000000000
--- a/sky/examples/editor/input.dart
+++ /dev/null
@@ -1,111 +0,0 @@
-// 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 '../../framework/fn.dart';
-import '../../framework/shell.dart' as shell;
-import 'package:sky/services/keyboard/keyboard.mojom.dart';
-import 'dart:math';
-
-class Input extends Component implements KeyboardClient{
-  static Style _style = new Style('''
-    display: paragraph;
-    padding: 10px;
-    height: 200px;
-    background-color: lightblue;'''
-  );
-
-  static Style _composingStyle = new Style('''
-    display: inline;
-    text-decoration: underline;'''
-  );
-
-  KeyboardServiceProxy _service;
-  KeyboardClientStub _stub;
-
-  String _text = "";
-  int _composingStart = -1;
-  int _composingEnd = -1;
-
-  Input({Object key}) : super(key: key, stateful: true) {
-    events.listen('click', _handleClick);
-    _stub = new KeyboardClientStub.unbound()..impl = this;
-  }
-
-  bool get _hasComposingRegion => _composingStart != -1 && _composingEnd != -1;
-
-  void _handleClick(_) {
-    if (_service != null)
-      return;
-    _service = new KeyboardServiceProxy.unbound();
-    shell.requestService(_service);
-    _service.ptr.show(_stub);
-  }
-
-  void _replaceComposing(String text) {
-    if (!_hasComposingRegion) {
-      _composingStart = _text.length;
-      _composingEnd = _composingStart + text.length;
-      _text += text;
-      return;
-    }
-
-    _text = _text.substring(0, _composingStart)
-        + text + _text.substring(_composingEnd);
-    _composingEnd = _composingStart + text.length;
-  }
-
-  void _clearComposingRegion() {
-    _composingStart = -1;
-    _composingEnd = -1;
-  }
-
-  void commitText(String text, int newCursorPosition) {
-    setState(() {
-      _replaceComposing(text);
-      _clearComposingRegion();
-    });
-  }
-
-  void setComposingText(String text, int newCursorPosition) {
-    setState(() {
-      _replaceComposing(text);
-    });
-  }
-
-  void setComposingRegion(int start, int end) {
-    setState(() {
-      _composingStart = start;
-      _composingEnd = end;
-    });
-  }
-
-  Node build() {
-    List<Node> children = new List<Node>();
-
-    if (!_hasComposingRegion) {
-      children.add(new Text(_text));
-    } else {
-      String run = _text.substring(0, _composingStart);
-      if (!run.isEmpty)
-        children.add(new Text(run));
-
-      run = _text.substring(_composingStart, _composingEnd);
-      if (!run.isEmpty) {
-        children.add(new Container(
-          style: _composingStyle,
-          children: [new Text(_text.substring(_composingStart, _composingEnd))]
-        ));
-      }
-
-      run = _text.substring(_composingEnd);
-      if (!run.isEmpty)
-        children.add(new Text(_text.substring(_composingEnd)));
-    }
-
-    return new Container(
-      style: _style,
-      children: children
-    );
-  }
-}