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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 import 'dart:async'; | |
| 6 | |
| 7 import '../widgets/basic.dart'; | |
| 8 import 'editable_string.dart'; | |
| 9 | |
| 10 class EditableText extends Component { | |
| 11 | |
| 12 EditableText({Object key, this.value, this.focused}) | |
| 13 : super(key: key, stateful: true); | |
| 14 | |
| 15 // static final Style _cursorStyle = new Style(''' | |
| 16 // width: 2px; | |
| 17 // height: 1.2em; | |
| 18 // vertical-align: top; | |
| 19 // background-color: ${Blue[500]};''' | |
| 20 // ); | |
| 21 | |
| 22 // static final Style _composingStyle = new Style(''' | |
| 23 // text-decoration: underline;''' | |
| 24 // ); | |
| 25 | |
| 26 EditableString value; | |
| 27 bool focused; | |
| 28 | |
| 29 void syncFields(EditableText source) { | |
| 30 value = source.value; | |
| 31 focused = source.focused; | |
| 32 } | |
| 33 | |
| 34 Timer _cursorTimer; | |
| 35 bool _showCursor = false; | |
| 36 | |
| 37 void _cursorTick(Timer timer) { | |
| 38 setState(() { | |
| 39 _showCursor = !_showCursor; | |
| 40 }); | |
| 41 } | |
| 42 | |
| 43 void _startCursorTimer() { | |
| 44 _showCursor = true; | |
| 45 _cursorTimer = new Timer.periodic( | |
| 46 new Duration(milliseconds: 500), _cursorTick); | |
| 47 } | |
| 48 | |
| 49 void didUnmount() { | |
| 50 if (_cursorTimer != null) | |
| 51 _stopCursorTimer(); | |
| 52 super.didUnmount(); | |
| 53 } | |
| 54 | |
| 55 void _stopCursorTimer() { | |
| 56 _cursorTimer.cancel(); | |
| 57 _cursorTimer = null; | |
| 58 _showCursor = false; | |
| 59 } | |
| 60 | |
| 61 UINode build() { | |
| 62 if (focused && _cursorTimer == null) | |
| 63 _startCursorTimer(); | |
| 64 else if (!focused && _cursorTimer != null) | |
| 65 _stopCursorTimer(); | |
| 66 | |
| 67 //List<UINode> children = new List<UINode>(); | |
| 68 String hack = ""; | |
| 69 | |
| 70 if (!value.composing.isValid) { | |
| 71 // children.add(new TextFragment(value.text)); | |
| 72 hack += value.text; | |
| 73 } else { | |
| 74 hack += value.textBefore(value.composing); | |
| 75 hack += value.textInside(value.composing); | |
| 76 hack += value.textAfter(value.composing); | |
| 77 // if (!composing.isEmpty) { | |
| 78 // children.add(new TextFragment( | |
| 79 // composing, | |
| 80 // key: 'composing', | |
| 81 // style: _composingStyle | |
| 82 // )); | |
| 83 // } | |
| 84 | |
| 85 // String afterComposing = value.textAfter(value.composing); | |
| 86 // if (!afterComposing.isEmpty) | |
| 87 // children.add(new TextFragment(afterComposing)); | |
| 88 } | |
| 89 | |
| 90 // if (_showCursor) | |
| 91 // children.add(new Container( | |
| 92 // key: 'cursor', | |
| 93 // // style: _cursorStyle | |
| 94 // )); | |
| 95 | |
| 96 return new Paragraph( | |
| 97 text: hack | |
| 98 ); | |
| 99 } | |
| 100 } | |
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