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import 'dart:math' as math; |
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import 'package:flutter/cupertino.dart'; |
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import 'package:flutter/foundation.dart'; |
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import 'package:flutter/gestures.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:flutter_quill/models/documents/attribute.dart'; |
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import 'package:flutter_quill/models/documents/document.dart'; |
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import 'package:flutter_quill/models/documents/nodes/container.dart' |
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as containerNode; |
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import 'package:flutter_quill/models/documents/nodes/leaf.dart'; |
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import 'package:flutter_quill/models/documents/nodes/line.dart'; |
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import 'package:flutter_quill/models/documents/nodes/node.dart'; |
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import 'package:flutter_quill/widgets/raw_editor.dart'; |
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import 'package:flutter_quill/widgets/text_selection.dart'; |
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import 'package:url_launcher/url_launcher.dart'; |
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import 'box.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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const urlPattern = |
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r"^((https?|http)://)?([-A-Z0-9.]+)(/[-A-Z0-9+&@#/%=~_|!:,.;]*)?(\?[A-Z0-9+&@#/%=~_|!:,.;]*)?$"; |
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abstract class EditorState extends State<RawEditor> { |
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TextEditingValue getTextEditingValue(); |
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void setTextEditingValue(TextEditingValue value); |
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RenderEditor getRenderEditor(); |
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EditorTextSelectionOverlay getSelectionOverlay(); |
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bool showToolbar(); |
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void hideToolbar(); |
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void requestKeyboard(); |
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} |
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abstract class RenderAbstractEditor { |
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TextSelection selectWordAtPosition(TextPosition position); |
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TextSelection selectLineAtPosition(TextPosition position); |
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double preferredLineHeight(TextPosition position); |
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TextPosition getPositionForOffset(Offset offset); |
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List<TextSelectionPoint> getEndpointsForSelection( |
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TextSelection textSelection); |
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void handleTapDown(TapDownDetails details); |
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void selectWordsInRange( |
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Offset from, |
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Offset to, |
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SelectionChangedCause cause, |
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); |
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void selectWordEdge(SelectionChangedCause cause); |
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void selectPositionAt(Offset from, Offset to, SelectionChangedCause cause); |
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void selectWord(SelectionChangedCause cause); |
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void selectPosition(SelectionChangedCause cause); |
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} |
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Widget _defaultEmbedBuilder(BuildContext context, Embed node) { |
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switch (node.value.type) { |
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case 'hr': |
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final style = QuillStyles.getStyles(context, true); |
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return Divider( |
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height: style.paragraph.style.fontSize * style.paragraph.style.height, |
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thickness: 2, |
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color: Colors.grey.shade200, |
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); |
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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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class QuillEditor extends StatefulWidget { |
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final QuillController controller; |
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final FocusNode focusNode; |
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final ScrollController scrollController; |
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final bool scrollable; |
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final EdgeInsetsGeometry padding; |
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final bool autoFocus; |
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final bool showCursor; |
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final bool readOnly; |
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final bool enableInteractiveSelection; |
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final double minHeight; |
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final double maxHeight; |
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final bool expands; |
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final TextCapitalization textCapitalization; |
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final Brightness keyboardAppearance; |
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final ScrollPhysics scrollPhysics; |
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ValueChanged<String> onLaunchUrl; |
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final EmbedBuilder embedBuilder; |
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QuillEditor( |
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{@required this.controller, |
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this.focusNode, |
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@required this.scrollController, |
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@required this.scrollable, |
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@required this.padding, |
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@required this.autoFocus, |
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this.showCursor, |
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@required this.readOnly, |
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this.enableInteractiveSelection, |
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this.minHeight, |
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this.maxHeight, |
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@required this.expands, |
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this.textCapitalization = TextCapitalization.sentences, |
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this.keyboardAppearance = Brightness.light, |
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this.scrollPhysics, |
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this.onLaunchUrl, |
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this.embedBuilder = _defaultEmbedBuilder}) |
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: assert(controller != null), |
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assert(scrollController != null), |
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assert(scrollable != null), |
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assert(autoFocus != null), |
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assert(readOnly != null), |
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assert(embedBuilder != null); |
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@override |
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_QuillEditorState createState() => _QuillEditorState(); |
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} |
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class _QuillEditorState extends State<QuillEditor> |
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implements EditorTextSelectionGestureDetectorBuilderDelegate { |
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final GlobalKey<EditorState> _editorKey = GlobalKey<EditorState>(); |
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EditorTextSelectionGestureDetectorBuilder _selectionGestureDetectorBuilder; |
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@override |
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void initState() { |
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super.initState(); |
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_selectionGestureDetectorBuilder = |
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_QuillEditorSelectionGestureDetectorBuilder(this); |
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} |
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@override |
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Widget build(BuildContext context) { |
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ThemeData theme = Theme.of(context); |
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TextSelectionThemeData selectionTheme = TextSelectionTheme.of(context); |
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TextSelectionControls textSelectionControls; |
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bool paintCursorAboveText; |
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bool cursorOpacityAnimates; |
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Offset cursorOffset; |
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Color cursorColor; |
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Color selectionColor; |
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Radius cursorRadius; |
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switch (theme.platform) { |
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case TargetPlatform.android: |
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case TargetPlatform.fuchsia: |
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case TargetPlatform.linux: |
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case TargetPlatform.windows: |
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textSelectionControls = materialTextSelectionControls; |
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paintCursorAboveText = false; |
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cursorOpacityAnimates = false; |
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cursorColor ??= selectionTheme.cursorColor ?? theme.colorScheme.primary; |
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selectionColor = selectionTheme.selectionColor ?? |
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theme.colorScheme.primary.withOpacity(0.40); |
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break; |
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case TargetPlatform.iOS: |
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case TargetPlatform.macOS: |
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CupertinoThemeData cupertinoTheme = CupertinoTheme.of(context); |
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textSelectionControls = cupertinoTextSelectionControls; |
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paintCursorAboveText = true; |
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cursorOpacityAnimates = true; |
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cursorColor ??= |
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selectionTheme.cursorColor ?? cupertinoTheme.primaryColor; |
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selectionColor = selectionTheme.selectionColor ?? |
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cupertinoTheme.primaryColor.withOpacity(0.40); |
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cursorRadius ??= const Radius.circular(2.0); |
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cursorOffset = Offset( |
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iOSHorizontalOffset / MediaQuery.of(context).devicePixelRatio, 0); |
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break; |
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default: |
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throw UnimplementedError(); |
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} |
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return _selectionGestureDetectorBuilder.build( |
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HitTestBehavior.translucent, |
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RawEditor( |
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_editorKey, |
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widget.controller, |
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widget.focusNode, |
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widget.scrollController, |
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widget.scrollable, |
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widget.padding, |
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widget.readOnly, |
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widget.onLaunchUrl, |
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ToolbarOptions( |
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copy: true, |
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cut: true, |
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paste: true, |
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selectAll: true, |
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), |
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theme.platform == TargetPlatform.iOS || |
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theme.platform == TargetPlatform.android, |
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widget.showCursor, |
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CursorStyle( |
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color: cursorColor, |
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backgroundColor: Colors.grey, |
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width: 2.0, |
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radius: cursorRadius, |
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offset: cursorOffset, |
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paintAboveText: paintCursorAboveText, |
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opacityAnimates: cursorOpacityAnimates, |
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), |
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widget.textCapitalization, |
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widget.maxHeight, |
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widget.minHeight, |
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widget.expands, |
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widget.autoFocus, |
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selectionColor, |
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textSelectionControls, |
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widget.keyboardAppearance, |
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widget.enableInteractiveSelection, |
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widget.scrollPhysics, |
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widget.embedBuilder), |
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); |
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} |
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@override |
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GlobalKey<EditorState> getEditableTextKey() { |
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return _editorKey; |
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} |
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@override |
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bool getForcePressEnabled() { |
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return false; |
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} |
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@override |
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bool getSelectionEnabled() { |
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return widget.enableInteractiveSelection; |
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} |
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_requestKeyboard() { |
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_editorKey.currentState.requestKeyboard(); |
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} |
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} |
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class _QuillEditorSelectionGestureDetectorBuilder |
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extends EditorTextSelectionGestureDetectorBuilder { |
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static final urlRegExp = new RegExp(urlPattern, caseSensitive: false); |
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final _QuillEditorState _state; |
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_QuillEditorSelectionGestureDetectorBuilder(this._state) : super(_state); |
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@override |
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onForcePressStart(ForcePressDetails details) { |
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super.onForcePressStart(details); |
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if (delegate.getSelectionEnabled() && shouldShowSelectionToolbar) { |
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getEditor().showToolbar(); |
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} |
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} |
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@override |
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onForcePressEnd(ForcePressDetails details) {} |
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@override |
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void onSingleLongTapMoveUpdate(LongPressMoveUpdateDetails details) { |
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if (!delegate.getSelectionEnabled()) { |
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return; |
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} |
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switch (Theme.of(_state.context).platform) { |
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case TargetPlatform.iOS: |
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case TargetPlatform.macOS: |
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getRenderEditor().selectPositionAt( |
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details.globalPosition, |
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null, |
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SelectionChangedCause.longPress, |
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); |
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break; |
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case TargetPlatform.android: |
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case TargetPlatform.fuchsia: |
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case TargetPlatform.linux: |
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case TargetPlatform.windows: |
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getRenderEditor().selectWordsInRange( |
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details.globalPosition - details.offsetFromOrigin, |
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details.globalPosition, |
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SelectionChangedCause.longPress, |
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); |
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break; |
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default: |
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throw ('Invalid platform'); |
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} |
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} |
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_launchUrlIfNeeded(TapUpDetails details) { |
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TextPosition pos = |
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getRenderEditor().getPositionForOffset(details.globalPosition); |
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containerNode.ChildQuery result = |
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getEditor().widget.controller.document.queryChild(pos.offset); |
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if (result.node == null) { |
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return; |
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} |
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Line line = result.node as Line; |
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containerNode.ChildQuery segmentResult = |
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line.queryChild(result.offset, false); |
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if (segmentResult.node == null) { |
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return; |
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} |
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Leaf segment = segmentResult.node as Leaf; |
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if (segment.style.containsKey(Attribute.link.key)) { |
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var launchUrl = getEditor().widget.onLaunchUrl; |
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if (launchUrl == null) { |
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launchUrl = _launchUrl; |
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} |
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String link = segment.style.attributes[Attribute.link.key].value; |
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if (getEditor().widget.readOnly && |
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link != null && |
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urlRegExp.firstMatch(link) != null) { |
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launchUrl(link); |
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} |
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} |
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} |
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void _launchUrl(String url) async { |
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if (await canLaunch(url)) { |
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await launch(url); |
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} |
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} |
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@override |
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onSingleTapUp(TapUpDetails details) { |
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getEditor().hideToolbar(); |
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_launchUrlIfNeeded(details); |
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if (delegate.getSelectionEnabled()) { |
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switch (Theme.of(_state.context).platform) { |
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case TargetPlatform.iOS: |
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case TargetPlatform.macOS: |
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switch (details.kind) { |
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case PointerDeviceKind.mouse: |
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case PointerDeviceKind.stylus: |
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case PointerDeviceKind.invertedStylus: |
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getRenderEditor().selectPosition(SelectionChangedCause.tap); |
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break; |
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case PointerDeviceKind.touch: |
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case PointerDeviceKind.unknown: |
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getRenderEditor().selectWordEdge(SelectionChangedCause.tap); |
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break; |
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} |
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break; |
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case TargetPlatform.android: |
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case TargetPlatform.fuchsia: |
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case TargetPlatform.linux: |
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case TargetPlatform.windows: |
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getRenderEditor().selectPosition(SelectionChangedCause.tap); |
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break; |
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} |
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} |
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_state._requestKeyboard(); |
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} |
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@override |
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void onSingleLongTapStart(LongPressStartDetails details) { |
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if (delegate.getSelectionEnabled()) { |
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switch (Theme.of(_state.context).platform) { |
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case TargetPlatform.iOS: |
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case TargetPlatform.macOS: |
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getRenderEditor().selectPositionAt( |
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details.globalPosition, |
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null, |
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SelectionChangedCause.longPress, |
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); |
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break; |
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case TargetPlatform.android: |
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case TargetPlatform.fuchsia: |
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case TargetPlatform.linux: |
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case TargetPlatform.windows: |
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getRenderEditor().selectWord(SelectionChangedCause.longPress); |
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Feedback.forLongPress(_state.context); |
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break; |
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default: |
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throw ('Invalid platform'); |
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} |
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} |
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} |
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} |
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typedef TextSelectionChangedHandler = void Function( |
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TextSelection selection, SelectionChangedCause cause); |
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class RenderEditor extends RenderEditableContainerBox |
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implements RenderAbstractEditor { |
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Document document; |
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TextSelection selection; |
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bool _hasFocus = false; |
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LayerLink _startHandleLayerLink; |
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LayerLink _endHandleLayerLink; |
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TextSelectionChangedHandler onSelectionChanged; |
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final ValueNotifier<bool> _selectionStartInViewport = |
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ValueNotifier<bool>(true); |
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ValueListenable<bool> get selectionStartInViewport => |
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_selectionStartInViewport; |
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ValueListenable<bool> get selectionEndInViewport => _selectionEndInViewport; |
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final ValueNotifier<bool> _selectionEndInViewport = ValueNotifier<bool>(true); |
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RenderEditor( |
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List<RenderEditableBox> children, |
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TextDirection textDirection, |
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EdgeInsetsGeometry padding, |
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this.document, |
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this.selection, |
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this._hasFocus, |
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this.onSelectionChanged, |
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this._startHandleLayerLink, |
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this._endHandleLayerLink, |
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EdgeInsets floatingCursorAddedMargin) |
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: assert(document != null), |
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assert(textDirection != null), |
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assert(_hasFocus != null), |
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assert(floatingCursorAddedMargin != null), |
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super( |
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children, |
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document.root, |
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textDirection, |
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padding, |
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); |
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setDocument(Document doc) { |
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assert(doc != null); |
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if (document == doc) { |
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return; |
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} |
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document = doc; |
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markNeedsLayout(); |
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} |
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setHasFocus(bool h) { |
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assert(h != null); |
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if (_hasFocus == h) { |
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return; |
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} |
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_hasFocus = h; |
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markNeedsSemanticsUpdate(); |
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} |
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setSelection(TextSelection t) { |
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if (selection == t) { |
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return; |
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} |
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selection = t; |
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markNeedsPaint(); |
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} |
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setStartHandleLayerLink(LayerLink value) { |
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if (_startHandleLayerLink == value) { |
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return; |
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} |
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_startHandleLayerLink = value; |
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markNeedsPaint(); |
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} |
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|
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setEndHandleLayerLink(LayerLink value) { |
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if (_endHandleLayerLink == value) { |
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return; |
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} |
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_endHandleLayerLink = value; |
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markNeedsPaint(); |
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} |
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|
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@override |
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List<TextSelectionPoint> getEndpointsForSelection( |
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TextSelection textSelection) { |
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assert(constraints != null); |
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|
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if (textSelection.isCollapsed) { |
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RenderEditableBox child = childAtPosition(textSelection.extent); |
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TextPosition localPosition = TextPosition( |
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offset: |
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textSelection.extentOffset - child.getContainer().getOffset()); |
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Offset localOffset = child.getOffsetForCaret(localPosition); |
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BoxParentData parentData = child.parentData; |
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return <TextSelectionPoint>[ |
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TextSelectionPoint( |
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Offset(0.0, child.preferredLineHeight(localPosition)) + |
|
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localOffset + |
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parentData.offset, |
|
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null) |
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]; |
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} |
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|
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Node baseNode = _container.queryChild(textSelection.start, false).node; |
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|
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var baseChild = firstChild; |
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while (baseChild != null) { |
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if (baseChild.getContainer() == baseNode) { |
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break; |
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} |
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baseChild = childAfter(baseChild); |
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} |
|
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assert(baseChild != null); |
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|
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BoxParentData baseParentData = baseChild.parentData; |
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TextSelection baseSelection = |
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localSelection(baseChild.getContainer(), textSelection, true); |
|
|
TextSelectionPoint basePoint = |
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baseChild.getBaseEndpointForSelection(baseSelection); |
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basePoint = TextSelectionPoint( |
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basePoint.point + baseParentData.offset, basePoint.direction); |
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|
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Node extentNode = _container.queryChild(textSelection.end, false).node; |
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var extentChild = baseChild; |
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while (extentChild != null) { |
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if (extentChild.getContainer() == extentNode) { |
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break; |
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} |
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extentChild = childAfter(extentChild); |
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} |
|
|
assert(extentChild != null); |
|
|
|
|
|
BoxParentData extentParentData = extentChild.parentData; |
|
|
TextSelection extentSelection = |
|
|
localSelection(extentChild.getContainer(), textSelection, true); |
|
|
TextSelectionPoint extentPoint = |
|
|
extentChild.getExtentEndpointForSelection(extentSelection); |
|
|
extentPoint = TextSelectionPoint( |
|
|
extentPoint.point + extentParentData.offset, extentPoint.direction); |
|
|
|
|
|
return <TextSelectionPoint>[basePoint, extentPoint]; |
|
|
} |
|
|
|
|
|
Offset _lastTapDownPosition; |
|
|
|
|
|
@override |
|
|
handleTapDown(TapDownDetails details) { |
|
|
_lastTapDownPosition = details.globalPosition; |
|
|
} |
|
|
|
|
|
@override |
|
|
selectWordsInRange( |
|
|
Offset from, |
|
|
Offset to, |
|
|
SelectionChangedCause cause, |
|
|
) { |
|
|
assert(cause != null); |
|
|
assert(from != null); |
|
|
if (onSelectionChanged == null) { |
|
|
return; |
|
|
} |
|
|
TextPosition firstPosition = getPositionForOffset(from); |
|
|
TextSelection firstWord = selectWordAtPosition(firstPosition); |
|
|
TextSelection lastWord = |
|
|
to == null ? firstWord : selectWordAtPosition(getPositionForOffset(to)); |
|
|
|
|
|
_handleSelectionChange( |
|
|
TextSelection( |
|
|
baseOffset: firstWord.base.offset, |
|
|
extentOffset: lastWord.extent.offset, |
|
|
affinity: firstWord.affinity, |
|
|
), |
|
|
cause, |
|
|
); |
|
|
} |
|
|
|
|
|
_handleSelectionChange( |
|
|
TextSelection nextSelection, |
|
|
SelectionChangedCause cause, |
|
|
) { |
|
|
bool focusingEmpty = nextSelection.baseOffset == 0 && |
|
|
nextSelection.extentOffset == 0 && |
|
|
!_hasFocus; |
|
|
if (nextSelection == selection && |
|
|
cause != SelectionChangedCause.keyboard && |
|
|
!focusingEmpty) { |
|
|
return; |
|
|
} |
|
|
if (onSelectionChanged != null) { |
|
|
onSelectionChanged(nextSelection, cause); |
|
|
} |
|
|
} |
|
|
|
|
|
@override |
|
|
selectWordEdge(SelectionChangedCause cause) { |
|
|
assert(cause != null); |
|
|
assert(_lastTapDownPosition != null); |
|
|
if (onSelectionChanged == null) { |
|
|
return; |
|
|
} |
|
|
TextPosition position = getPositionForOffset(_lastTapDownPosition); |
|
|
RenderEditableBox child = childAtPosition(position); |
|
|
int nodeOffset = child.getContainer().getOffset(); |
|
|
TextPosition localPosition = TextPosition( |
|
|
offset: position.offset - nodeOffset, |
|
|
affinity: position.affinity, |
|
|
); |
|
|
TextRange localWord = child.getWordBoundary(localPosition); |
|
|
TextRange word = TextRange( |
|
|
start: localWord.start + nodeOffset, |
|
|
end: localWord.end + nodeOffset, |
|
|
); |
|
|
if (position.offset - word.start <= 1) { |
|
|
_handleSelectionChange( |
|
|
TextSelection.collapsed( |
|
|
offset: word.start, affinity: TextAffinity.downstream), |
|
|
cause, |
|
|
); |
|
|
} else { |
|
|
_handleSelectionChange( |
|
|
TextSelection.collapsed( |
|
|
offset: word.end, affinity: TextAffinity.upstream), |
|
|
cause, |
|
|
); |
|
|
} |
|
|
} |
|
|
|
|
|
@override |
|
|
selectPositionAt( |
|
|
Offset from, |
|
|
Offset to, |
|
|
SelectionChangedCause cause, |
|
|
) { |
|
|
assert(cause != null); |
|
|
assert(from != null); |
|
|
if (onSelectionChanged == null) { |
|
|
return; |
|
|
} |
|
|
TextPosition fromPosition = getPositionForOffset(from); |
|
|
TextPosition toPosition = to == null ? null : getPositionForOffset(to); |
|
|
|
|
|
int baseOffset = fromPosition.offset; |
|
|
int extentOffset = fromPosition.offset; |
|
|
if (toPosition != null) { |
|
|
baseOffset = math.min(fromPosition.offset, toPosition.offset); |
|
|
extentOffset = math.max(fromPosition.offset, toPosition.offset); |
|
|
} |
|
|
|
|
|
TextSelection newSelection = TextSelection( |
|
|
baseOffset: baseOffset, |
|
|
extentOffset: extentOffset, |
|
|
affinity: fromPosition.affinity, |
|
|
); |
|
|
_handleSelectionChange(newSelection, cause); |
|
|
} |
|
|
|
|
|
@override |
|
|
selectWord(SelectionChangedCause cause) { |
|
|
selectWordsInRange(_lastTapDownPosition, null, cause); |
|
|
} |
|
|
|
|
|
@override |
|
|
selectPosition(SelectionChangedCause cause) { |
|
|
selectPositionAt(_lastTapDownPosition, null, cause); |
|
|
} |
|
|
|
|
|
@override |
|
|
TextSelection selectWordAtPosition(TextPosition position) { |
|
|
RenderEditableBox child = childAtPosition(position); |
|
|
int nodeOffset = child.getContainer().getOffset(); |
|
|
TextPosition localPosition = TextPosition( |
|
|
offset: position.offset - nodeOffset, affinity: position.affinity); |
|
|
TextRange localWord = child.getWordBoundary(localPosition); |
|
|
TextRange word = TextRange( |
|
|
start: localWord.start + nodeOffset, |
|
|
end: localWord.end + nodeOffset, |
|
|
); |
|
|
if (position.offset >= word.end) { |
|
|
return TextSelection.fromPosition(position); |
|
|
} |
|
|
return TextSelection(baseOffset: word.start, extentOffset: word.end); |
|
|
} |
|
|
|
|
|
@override |
|
|
TextSelection selectLineAtPosition(TextPosition position) { |
|
|
RenderEditableBox child = childAtPosition(position); |
|
|
int nodeOffset = child.getContainer().getOffset(); |
|
|
TextPosition localPosition = TextPosition( |
|
|
offset: position.offset - nodeOffset, affinity: position.affinity); |
|
|
TextRange localLineRange = child.getLineBoundary(localPosition); |
|
|
TextRange line = TextRange( |
|
|
start: localLineRange.start + nodeOffset, |
|
|
end: localLineRange.end + nodeOffset, |
|
|
); |
|
|
|
|
|
if (position.offset >= line.end) { |
|
|
return TextSelection.fromPosition(position); |
|
|
} |
|
|
return TextSelection(baseOffset: line.start, extentOffset: line.end); |
|
|
} |
|
|
|
|
|
@override |
|
|
void paint(PaintingContext context, Offset offset) { |
|
|
defaultPaint(context, offset); |
|
|
_paintHandleLayers(context, getEndpointsForSelection(selection)); |
|
|
} |
|
|
|
|
|
@override |
|
|
bool hitTestChildren(BoxHitTestResult result, {Offset position}) { |
|
|
return defaultHitTestChildren(result, position: position); |
|
|
} |
|
|
|
|
|
_paintHandleLayers( |
|
|
PaintingContext context, List<TextSelectionPoint> endpoints) { |
|
|
var startPoint = endpoints[0].point; |
|
|
startPoint = Offset( |
|
|
startPoint.dx.clamp(0.0, size.width), |
|
|
startPoint.dy.clamp(0.0, size.height), |
|
|
); |
|
|
context.pushLayer( |
|
|
LeaderLayer(link: _startHandleLayerLink, offset: startPoint), |
|
|
super.paint, |
|
|
Offset.zero, |
|
|
); |
|
|
if (endpoints.length == 2) { |
|
|
var endPoint = endpoints[1].point; |
|
|
endPoint = Offset( |
|
|
endPoint.dx.clamp(0.0, size.width), |
|
|
endPoint.dy.clamp(0.0, size.height), |
|
|
); |
|
|
context.pushLayer( |
|
|
LeaderLayer(link: _endHandleLayerLink, offset: endPoint), |
|
|
super.paint, |
|
|
Offset.zero, |
|
|
); |
|
|
} |
|
|
} |
|
|
|
|
|
@override |
|
|
double preferredLineHeight(TextPosition position) { |
|
|
RenderEditableBox child = childAtPosition(position); |
|
|
return child.preferredLineHeight(TextPosition( |
|
|
offset: position.offset - child.getContainer().getOffset())); |
|
|
} |
|
|
|
|
|
@override |
|
|
TextPosition getPositionForOffset(Offset offset) { |
|
|
Offset local = globalToLocal(offset); |
|
|
RenderEditableBox child = childAtOffset(local); |
|
|
|
|
|
BoxParentData parentData = child.parentData; |
|
|
Offset localOffset = local - parentData.offset; |
|
|
TextPosition localPosition = child.getPositionForOffset(localOffset); |
|
|
return TextPosition( |
|
|
offset: localPosition.offset + child.getContainer().getOffset(), |
|
|
affinity: localPosition.affinity, |
|
|
); |
|
|
} |
|
|
|
|
|
double getOffsetToRevealCursor( |
|
|
double viewportHeight, double scrollOffset, double offsetInViewport) { |
|
|
List<TextSelectionPoint> endpoints = getEndpointsForSelection(selection); |
|
|
if (endpoints.length != 1) { |
|
|
return null; |
|
|
} |
|
|
RenderEditableBox child = childAtPosition(selection.extent); |
|
|
const kMargin = 8.0; |
|
|
|
|
|
double caretTop = endpoints.single.point.dy - |
|
|
child.preferredLineHeight(TextPosition( |
|
|
offset: |
|
|
selection.extentOffset - child.getContainer().getOffset())) - |
|
|
kMargin + |
|
|
offsetInViewport; |
|
|
final caretBottom = endpoints.single.point.dy + kMargin + offsetInViewport; |
|
|
double dy; |
|
|
if (caretTop < scrollOffset) { |
|
|
dy = caretTop; |
|
|
} else if (caretBottom > scrollOffset + viewportHeight) { |
|
|
dy = caretBottom - viewportHeight; |
|
|
} |
|
|
if (dy == null) { |
|
|
return null; |
|
|
} |
|
|
return math.max(dy, 0.0); |
|
|
} |
|
|
} |
|
|
|
|
|
class EditableContainerParentData |
|
|
extends ContainerBoxParentData<RenderEditableBox> {} |
|
|
|
|
|
class RenderEditableContainerBox extends RenderBox |
|
|
with |
|
|
ContainerRenderObjectMixin<RenderEditableBox, |
|
|
EditableContainerParentData>, |
|
|
RenderBoxContainerDefaultsMixin<RenderEditableBox, |
|
|
EditableContainerParentData> { |
|
|
containerNode.Container _container; |
|
|
TextDirection textDirection; |
|
|
EdgeInsetsGeometry _padding; |
|
|
EdgeInsets _resolvedPadding; |
|
|
|
|
|
RenderEditableContainerBox(List<RenderEditableBox> children, this._container, |
|
|
this.textDirection, this._padding) |
|
|
: assert(_container != null), |
|
|
assert(textDirection != null), |
|
|
assert(_padding != null), |
|
|
assert(_padding.isNonNegative) { |
|
|
addAll(children); |
|
|
} |
|
|
|
|
|
containerNode.Container getContainer() { |
|
|
return _container; |
|
|
} |
|
|
|
|
|
setContainer(containerNode.Container c) { |
|
|
assert(c != null); |
|
|
if (_container == c) { |
|
|
return; |
|
|
} |
|
|
_container = c; |
|
|
markNeedsLayout(); |
|
|
} |
|
|
|
|
|
EdgeInsetsGeometry getPadding() => _padding; |
|
|
|
|
|
setPadding(EdgeInsetsGeometry value) { |
|
|
assert(value != null); |
|
|
assert(value.isNonNegative); |
|
|
if (_padding == value) { |
|
|
return; |
|
|
} |
|
|
_padding = value; |
|
|
_markNeedsPaddingResolution(); |
|
|
} |
|
|
|
|
|
EdgeInsets get resolvedPadding => _resolvedPadding; |
|
|
|
|
|
_resolvePadding() { |
|
|
if (_resolvedPadding != null) { |
|
|
return; |
|
|
} |
|
|
_resolvedPadding = _padding.resolve(textDirection); |
|
|
_resolvedPadding = _resolvedPadding.copyWith(left: _resolvedPadding.left); |
|
|
|
|
|
assert(_resolvedPadding.isNonNegative); |
|
|
} |
|
|
|
|
|
RenderEditableBox childAtPosition(TextPosition position) { |
|
|
assert(firstChild != null); |
|
|
|
|
|
Node targetNode = _container.queryChild(position.offset, false).node; |
|
|
|
|
|
var targetChild = firstChild; |
|
|
while (targetChild != null) { |
|
|
if (targetChild.getContainer() == targetNode) { |
|
|
break; |
|
|
} |
|
|
targetChild = childAfter(targetChild); |
|
|
} |
|
|
assert(targetChild != null); |
|
|
return targetChild; |
|
|
} |
|
|
|
|
|
_markNeedsPaddingResolution() { |
|
|
_resolvedPadding = null; |
|
|
markNeedsLayout(); |
|
|
} |
|
|
|
|
|
RenderEditableBox childAtOffset(Offset offset) { |
|
|
assert(firstChild != null); |
|
|
_resolvePadding(); |
|
|
|
|
|
if (offset.dy <= _resolvedPadding.top) { |
|
|
return firstChild; |
|
|
} |
|
|
if (offset.dy >= size.height - _resolvedPadding.bottom) { |
|
|
return lastChild; |
|
|
} |
|
|
|
|
|
var child = firstChild; |
|
|
double dx = -offset.dx, dy = _resolvedPadding.top; |
|
|
while (child != null) { |
|
|
if (child.size.contains(offset.translate(dx, -dy))) { |
|
|
return child; |
|
|
} |
|
|
dy += child.size.height; |
|
|
child = childAfter(child); |
|
|
} |
|
|
throw ('No child'); |
|
|
} |
|
|
|
|
|
@override |
|
|
setupParentData(RenderBox child) { |
|
|
if (child.parentData is EditableContainerParentData) { |
|
|
return; |
|
|
} |
|
|
|
|
|
child.parentData = EditableContainerParentData(); |
|
|
} |
|
|
|
|
|
@override |
|
|
void performLayout() { |
|
|
assert(!constraints.hasBoundedHeight); |
|
|
assert(constraints.hasBoundedWidth); |
|
|
_resolvePadding(); |
|
|
assert(_resolvedPadding != null); |
|
|
|
|
|
double mainAxisExtent = _resolvedPadding.top; |
|
|
var child = firstChild; |
|
|
BoxConstraints innerConstraints = |
|
|
BoxConstraints.tightFor(width: constraints.maxWidth) |
|
|
.deflate(_resolvedPadding); |
|
|
while (child != null) { |
|
|
child.layout(innerConstraints, parentUsesSize: true); |
|
|
final EditableContainerParentData childParentData = child.parentData; |
|
|
childParentData.offset = Offset(_resolvedPadding.left, mainAxisExtent); |
|
|
mainAxisExtent += child.size.height; |
|
|
assert(child.parentData == childParentData); |
|
|
child = childParentData.nextSibling; |
|
|
} |
|
|
mainAxisExtent += _resolvedPadding.bottom; |
|
|
size = constraints.constrain(Size(constraints.maxWidth, mainAxisExtent)); |
|
|
|
|
|
assert(size.isFinite); |
|
|
} |
|
|
|
|
|
double _getIntrinsicCrossAxis(double Function(RenderBox child) childSize) { |
|
|
double extent = 0.0; |
|
|
var child = firstChild; |
|
|
while (child != null) { |
|
|
extent = math.max(extent, childSize(child)); |
|
|
EditableContainerParentData childParentData = child.parentData; |
|
|
child = childParentData.nextSibling; |
|
|
} |
|
|
return extent; |
|
|
} |
|
|
|
|
|
double _getIntrinsicMainAxis(double Function(RenderBox child) childSize) { |
|
|
double extent = 0.0; |
|
|
var child = firstChild; |
|
|
while (child != null) { |
|
|
extent += childSize(child); |
|
|
EditableContainerParentData childParentData = child.parentData; |
|
|
child = childParentData.nextSibling; |
|
|
} |
|
|
return extent; |
|
|
} |
|
|
|
|
|
@override |
|
|
double computeMinIntrinsicWidth(double height) { |
|
|
_resolvePadding(); |
|
|
return _getIntrinsicCrossAxis((RenderBox child) { |
|
|
double childHeight = math.max( |
|
|
0.0, height - _resolvedPadding.top + _resolvedPadding.bottom); |
|
|
return child.getMinIntrinsicWidth(childHeight) + |
|
|
_resolvedPadding.left + |
|
|
_resolvedPadding.right; |
|
|
}); |
|
|
} |
|
|
|
|
|
@override |
|
|
double computeMaxIntrinsicWidth(double height) { |
|
|
_resolvePadding(); |
|
|
return _getIntrinsicCrossAxis((RenderBox child) { |
|
|
double childHeight = math.max( |
|
|
0.0, height - _resolvedPadding.top + _resolvedPadding.bottom); |
|
|
return child.getMaxIntrinsicWidth(childHeight) + |
|
|
_resolvedPadding.left + |
|
|
_resolvedPadding.right; |
|
|
}); |
|
|
} |
|
|
|
|
|
@override |
|
|
double computeMinIntrinsicHeight(double width) { |
|
|
_resolvePadding(); |
|
|
return _getIntrinsicMainAxis((RenderBox child) { |
|
|
double childWidth = |
|
|
math.max(0.0, width - _resolvedPadding.left + _resolvedPadding.right); |
|
|
return child.getMinIntrinsicHeight(childWidth) + |
|
|
_resolvedPadding.top + |
|
|
_resolvedPadding.bottom; |
|
|
}); |
|
|
} |
|
|
|
|
|
@override |
|
|
double computeMaxIntrinsicHeight(double width) { |
|
|
_resolvePadding(); |
|
|
return _getIntrinsicMainAxis((RenderBox child) { |
|
|
final childWidth = |
|
|
math.max(0.0, width - _resolvedPadding.left + _resolvedPadding.right); |
|
|
return child.getMaxIntrinsicHeight(childWidth) + |
|
|
_resolvedPadding.top + |
|
|
_resolvedPadding.bottom; |
|
|
}); |
|
|
} |
|
|
|
|
|
@override |
|
|
double computeDistanceToActualBaseline(TextBaseline baseline) { |
|
|
_resolvePadding(); |
|
|
return defaultComputeDistanceToFirstActualBaseline(baseline) + |
|
|
_resolvedPadding.top; |
|
|
} |
|
|
}
|
|
|
|
