Xun Gong
4 years ago
commit
ee11aef543
15 changed files with 805 additions and 312 deletions
@ -0,0 +1,344 @@ |
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import 'dart:convert'; |
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import 'dart:io' as io; |
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|
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import 'package:flutter/foundation.dart'; |
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import 'package:flutter/material.dart'; |
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import 'package:flutter/rendering.dart'; |
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import 'package:flutter/services.dart'; |
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import 'package:string_validator/string_validator.dart'; |
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import 'package:tuple/tuple.dart'; |
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|
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import '../models/documents/attribute.dart'; |
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import '../models/documents/document.dart'; |
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import '../models/documents/nodes/block.dart'; |
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import '../models/documents/nodes/leaf.dart' as leaf; |
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import '../models/documents/nodes/line.dart'; |
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import 'controller.dart'; |
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import 'cursor.dart'; |
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import 'default_styles.dart'; |
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import 'delegate.dart'; |
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import 'editor.dart'; |
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import 'text_block.dart'; |
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import 'text_line.dart'; |
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|
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class QuillSimpleViewer extends StatefulWidget { |
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const QuillSimpleViewer({ |
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required this.controller, |
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this.customStyles, |
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this.truncate = false, |
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this.truncateScale, |
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this.truncateAlignment, |
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this.truncateHeight, |
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this.truncateWidth, |
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this.scrollBottomInset = 0, |
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this.padding = EdgeInsets.zero, |
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this.embedBuilder, |
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Key? key, |
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}) : assert(truncate || |
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((truncateScale == null) && |
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(truncateAlignment == null) && |
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(truncateHeight == null) && |
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(truncateWidth == null))), |
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super(key: key); |
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|
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final QuillController controller; |
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final DefaultStyles? customStyles; |
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final bool truncate; |
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final double? truncateScale; |
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final Alignment? truncateAlignment; |
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final double? truncateHeight; |
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final double? truncateWidth; |
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final double scrollBottomInset; |
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final EdgeInsetsGeometry padding; |
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final EmbedBuilder? embedBuilder; |
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|
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@override |
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_QuillSimpleViewerState createState() => _QuillSimpleViewerState(); |
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} |
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class _QuillSimpleViewerState extends State<QuillSimpleViewer> |
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with SingleTickerProviderStateMixin { |
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late DefaultStyles _styles; |
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final LayerLink _toolbarLayerLink = LayerLink(); |
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final LayerLink _startHandleLayerLink = LayerLink(); |
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final LayerLink _endHandleLayerLink = LayerLink(); |
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late CursorCont _cursorCont; |
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@override |
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void initState() { |
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super.initState(); |
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_cursorCont = CursorCont( |
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show: ValueNotifier<bool>(false), |
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style: const CursorStyle( |
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color: Colors.black, |
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backgroundColor: Colors.grey, |
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width: 2, |
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radius: Radius.zero, |
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offset: Offset.zero, |
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), |
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tickerProvider: this, |
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); |
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} |
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@override |
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void didChangeDependencies() { |
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super.didChangeDependencies(); |
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final parentStyles = QuillStyles.getStyles(context, true); |
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final defaultStyles = DefaultStyles.getInstance(context); |
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_styles = (parentStyles != null) |
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? defaultStyles.merge(parentStyles) |
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: defaultStyles; |
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if (widget.customStyles != null) { |
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_styles = _styles.merge(widget.customStyles!); |
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} |
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} |
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|
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EmbedBuilder get embedBuilder => widget.embedBuilder ?? _defaultEmbedBuilder; |
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Widget _defaultEmbedBuilder(BuildContext context, leaf.Embed node) { |
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assert(!kIsWeb, 'Please provide EmbedBuilder for Web'); |
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switch (node.value.type) { |
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case 'image': |
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final imageUrl = _standardizeImageUrl(node.value.data); |
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return imageUrl.startsWith('http') |
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? Image.network(imageUrl) |
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: isBase64(imageUrl) |
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? Image.memory(base64.decode(imageUrl)) |
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: Image.file(io.File(imageUrl)); |
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default: |
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throw UnimplementedError( |
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'Embeddable type "${node.value.type}" is not supported by default embed ' |
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'builder of QuillEditor. You must pass your own builder function to ' |
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'embedBuilder property of QuillEditor or QuillField widgets.'); |
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} |
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} |
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|
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String _standardizeImageUrl(String url) { |
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if (url.contains('base64')) { |
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return url.split(',')[1]; |
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} |
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return url; |
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} |
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@override |
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Widget build(BuildContext context) { |
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final _doc = widget.controller.document; |
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// if (_doc.isEmpty() && |
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// !widget.focusNode.hasFocus && |
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// widget.placeholder != null) { |
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// _doc = Document.fromJson(jsonDecode( |
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// '[{"attributes":{"placeholder":true},"insert":"${widget.placeholder}\\n"}]')); |
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// } |
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Widget child = CompositedTransformTarget( |
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link: _toolbarLayerLink, |
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child: Semantics( |
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child: _SimpleViewer( |
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document: _doc, |
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textDirection: _textDirection, |
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startHandleLayerLink: _startHandleLayerLink, |
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endHandleLayerLink: _endHandleLayerLink, |
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onSelectionChanged: _nullSelectionChanged, |
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scrollBottomInset: widget.scrollBottomInset, |
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padding: widget.padding, |
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children: _buildChildren(_doc, context), |
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), |
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), |
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); |
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if (widget.truncate) { |
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if (widget.truncateScale != null) { |
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child = Container( |
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height: widget.truncateHeight, |
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child: Align( |
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heightFactor: widget.truncateScale, |
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widthFactor: widget.truncateScale, |
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alignment: widget.truncateAlignment ?? Alignment.topLeft, |
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child: Container( |
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width: widget.truncateWidth! / widget.truncateScale!, |
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child: SingleChildScrollView( |
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physics: const NeverScrollableScrollPhysics(), |
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child: Transform.scale( |
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scale: widget.truncateScale!, |
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alignment: |
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widget.truncateAlignment ?? Alignment.topLeft, |
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child: child))))); |
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} else { |
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child = Container( |
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height: widget.truncateHeight, |
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width: widget.truncateWidth, |
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child: SingleChildScrollView( |
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physics: const NeverScrollableScrollPhysics(), child: child)); |
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} |
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} |
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return QuillStyles(data: _styles, child: child); |
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} |
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List<Widget> _buildChildren(Document doc, BuildContext context) { |
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final result = <Widget>[]; |
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final indentLevelCounts = <int, int>{}; |
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for (final node in doc.root.children) { |
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if (node is Line) { |
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final editableTextLine = _getEditableTextLineFromNode(node, context); |
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result.add(editableTextLine); |
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} else if (node is Block) { |
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final attrs = node.style.attributes; |
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final editableTextBlock = EditableTextBlock( |
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node, |
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_textDirection, |
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widget.scrollBottomInset, |
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_getVerticalSpacingForBlock(node, _styles), |
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widget.controller.selection, |
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Colors.black, |
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// selectionColor, |
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_styles, |
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false, |
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// enableInteractiveSelection, |
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false, |
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// hasFocus, |
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attrs.containsKey(Attribute.codeBlock.key) |
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? const EdgeInsets.all(16) |
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: null, |
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embedBuilder, |
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_cursorCont, |
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indentLevelCounts, |
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_handleCheckboxTap); |
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result.add(editableTextBlock); |
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} else { |
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throw StateError('Unreachable.'); |
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} |
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} |
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return result; |
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} |
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/// Updates the checkbox positioned at [offset] in document |
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/// by changing its attribute according to [value]. |
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void _handleCheckboxTap(int offset, bool value) { |
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// readonly - do nothing |
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} |
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TextDirection get _textDirection { |
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final result = Directionality.of(context); |
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return result; |
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} |
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EditableTextLine _getEditableTextLineFromNode( |
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Line node, BuildContext context) { |
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final textLine = TextLine( |
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line: node, |
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textDirection: _textDirection, |
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embedBuilder: embedBuilder, |
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styles: _styles, |
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); |
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final editableTextLine = EditableTextLine( |
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node, |
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null, |
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textLine, |
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0, |
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_getVerticalSpacingForLine(node, _styles), |
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_textDirection, |
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widget.controller.selection, |
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Colors.black, |
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//widget.selectionColor, |
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false, |
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//enableInteractiveSelection, |
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false, |
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//_hasFocus, |
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MediaQuery.of(context).devicePixelRatio, |
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_cursorCont); |
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return editableTextLine; |
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} |
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Tuple2<double, double> _getVerticalSpacingForLine( |
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Line line, DefaultStyles? defaultStyles) { |
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final attrs = line.style.attributes; |
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if (attrs.containsKey(Attribute.header.key)) { |
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final int? level = attrs[Attribute.header.key]!.value; |
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switch (level) { |
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case 1: |
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return defaultStyles!.h1!.verticalSpacing; |
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case 2: |
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return defaultStyles!.h2!.verticalSpacing; |
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case 3: |
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return defaultStyles!.h3!.verticalSpacing; |
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default: |
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throw 'Invalid level $level'; |
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} |
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} |
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return defaultStyles!.paragraph!.verticalSpacing; |
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} |
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Tuple2<double, double> _getVerticalSpacingForBlock( |
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Block node, DefaultStyles? defaultStyles) { |
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final attrs = node.style.attributes; |
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if (attrs.containsKey(Attribute.blockQuote.key)) { |
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return defaultStyles!.quote!.verticalSpacing; |
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} else if (attrs.containsKey(Attribute.codeBlock.key)) { |
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return defaultStyles!.code!.verticalSpacing; |
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} else if (attrs.containsKey(Attribute.indent.key)) { |
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return defaultStyles!.indent!.verticalSpacing; |
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} |
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return defaultStyles!.lists!.verticalSpacing; |
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} |
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void _nullSelectionChanged( |
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TextSelection selection, SelectionChangedCause cause) {} |
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} |
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class _SimpleViewer extends MultiChildRenderObjectWidget { |
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_SimpleViewer({ |
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required List<Widget> children, |
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required this.document, |
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required this.textDirection, |
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required this.startHandleLayerLink, |
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required this.endHandleLayerLink, |
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required this.onSelectionChanged, |
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required this.scrollBottomInset, |
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this.padding = EdgeInsets.zero, |
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Key? key, |
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}) : super(key: key, children: children); |
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|
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final Document document; |
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final TextDirection textDirection; |
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final LayerLink startHandleLayerLink; |
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final LayerLink endHandleLayerLink; |
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final TextSelectionChangedHandler onSelectionChanged; |
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final double scrollBottomInset; |
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final EdgeInsetsGeometry padding; |
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@override |
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RenderEditor createRenderObject(BuildContext context) { |
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return RenderEditor( |
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null, |
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textDirection, |
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scrollBottomInset, |
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padding, |
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document, |
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const TextSelection(baseOffset: 0, extentOffset: 0), |
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false, |
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// hasFocus, |
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onSelectionChanged, |
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startHandleLayerLink, |
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endHandleLayerLink, |
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const EdgeInsets.fromLTRB(4, 4, 4, 5), |
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); |
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} |
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@override |
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void updateRenderObject( |
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BuildContext context, covariant RenderEditor renderObject) { |
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renderObject |
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..document = document |
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..setContainer(document.root) |
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..textDirection = textDirection |
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..setStartHandleLayerLink(startHandleLayerLink) |
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..setEndHandleLayerLink(endHandleLayerLink) |
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..onSelectionChanged = onSelectionChanged |
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..setScrollBottomInset(scrollBottomInset) |
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..setPadding(padding); |
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} |
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} |
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