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901 行
38 KiB
901 行
38 KiB
using System;
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using System.Collections.Generic;
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using Unity.UIWidgets.animation;
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using Unity.UIWidgets.async;
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using Unity.UIWidgets.foundation;
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using Unity.UIWidgets.painting;
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using Unity.UIWidgets.rendering;
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using Unity.UIWidgets.scheduler;
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using Unity.UIWidgets.service;
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using Unity.UIWidgets.ui;
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using TextStyle = Unity.UIWidgets.painting.TextStyle;
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namespace Unity.UIWidgets.widgets {
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public delegate void SelectionChangedCallback(TextSelection selection, SelectionChangedCause cause);
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public class TextEditingController : ValueNotifier<TextEditingValue> {
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public TextEditingController(string text) : base(text == null
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? TextEditingValue.empty
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: new TextEditingValue(text)) {
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}
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TextEditingController(TextEditingValue value) : base(value ?? TextEditingValue.empty) {
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}
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public TextEditingController fromValue(TextEditingValue value) {
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return new TextEditingController(value);
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}
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public string text {
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get { return this.value.text; }
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set {
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this.value = this.value.copyWith(text: value, selection: TextSelection.collapsed(-1),
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composing: TextRange.empty);
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}
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}
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public TextSelection selection {
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get { return this.value.selection; }
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set {
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if (value.start > this.text.Length || value.end > this.text.Length) {
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throw new UIWidgetsError($"invalid text selection: {value}");
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}
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this.value = this.value.copyWith(selection: value, composing: TextRange.empty);
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}
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}
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public void clear() {
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this.value = TextEditingValue.empty;
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}
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public void clearComposing() {
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this.value = this.value.copyWith(composing: TextRange.empty);
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}
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}
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public class EditableText : StatefulWidget {
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public readonly TextEditingController controller;
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public readonly FocusNode focusNode;
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public readonly bool obscureText;
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public readonly bool autocorrect;
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public readonly TextStyle style;
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public readonly TextAlign textAlign;
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public readonly TextDirection? textDirection;
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public readonly double? textScaleFactor;
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public readonly Color cursorColor;
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public readonly int? maxLines;
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public readonly bool autofocus;
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public readonly Color selectionColor;
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public readonly TextSelectionControls selectionControls;
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public readonly TextInputType keyboardType;
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public readonly TextInputAction? textInputAction;
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public readonly ValueChanged<string> onChanged;
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public readonly VoidCallback onEditingComplete;
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public readonly ValueChanged<string> onSubmitted;
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public readonly SelectionChangedCallback onSelectionChanged;
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public readonly List<TextInputFormatter> inputFormatters;
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public readonly bool rendererIgnoresPointer;
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public EditableText(TextEditingController controller, FocusNode focusNode, TextStyle style,
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Color cursorColor, bool obscureText = false, bool autocorrect = false,
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TextAlign textAlign = TextAlign.left, TextDirection? textDirection = null,
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double? textScaleFactor = null, int? maxLines = 1,
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bool autofocus = false, Color selectionColor = null, TextSelectionControls selectionControls = null,
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TextInputType keyboardType = null, TextInputAction? textInputAction = null,
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ValueChanged<string> onChanged = null, VoidCallback onEditingComplete = null,
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ValueChanged<string> onSubmitted = null, SelectionChangedCallback onSelectionChanged = null,
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List<TextInputFormatter> inputFormatters = null, bool rendererIgnoresPointer = false,
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EdgeInsets scrollPadding = null,
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Key key = null) : base(key) {
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D.assert(controller != null);
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D.assert(focusNode != null);
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D.assert(style != null);
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D.assert(cursorColor != null);
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D.assert(maxLines == null || maxLines > 0);
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this.keyboardType = keyboardType ?? (maxLines == 1 ? TextInputType.text : TextInputType.multiline);
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this.scrollPadding = scrollPadding ?? EdgeInsets.all(20.0);
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this.controller = controller;
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this.focusNode = focusNode;
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this.obscureText = obscureText;
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this.autocorrect = autocorrect;
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this.style = style;
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this.textAlign = textAlign;
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this.textDirection = textDirection;
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this.textScaleFactor = textScaleFactor;
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this.textInputAction = textInputAction;
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this.cursorColor = cursorColor;
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this.maxLines = maxLines;
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this.autofocus = autofocus;
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this.selectionColor = selectionColor;
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this.onChanged = onChanged;
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this.onSubmitted = onSubmitted;
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this.onSelectionChanged = onSelectionChanged;
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this.onEditingComplete = onEditingComplete;
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this.rendererIgnoresPointer = rendererIgnoresPointer;
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this.selectionControls = selectionControls;
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if (maxLines == 1) {
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this.inputFormatters = new List<TextInputFormatter>();
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this.inputFormatters.Add(BlacklistingTextInputFormatter.singleLineFormatter);
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if (inputFormatters != null) {
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this.inputFormatters.AddRange(inputFormatters);
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}
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}
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else {
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this.inputFormatters = inputFormatters;
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}
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}
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public readonly EdgeInsets scrollPadding;
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public override State createState() {
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return new EditableTextState();
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}
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public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
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base.debugFillProperties(properties);
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properties.add(new DiagnosticsProperty<TextEditingController>("controller", this.controller));
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properties.add(new DiagnosticsProperty<FocusNode>("focusNode", this.focusNode));
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properties.add(new DiagnosticsProperty<bool>("obscureText", this.obscureText, defaultValue: false));
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properties.add(new DiagnosticsProperty<bool>("autocorrect", this.autocorrect, defaultValue: true));
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if (this.style != null) {
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this.style.debugFillProperties(properties);
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}
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properties.add(new EnumProperty<TextAlign>("textAlign", this.textAlign,
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defaultValue: Diagnostics.kNullDefaultValue));
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properties.add(new EnumProperty<TextDirection?>("textDirection", this.textDirection,
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defaultValue: Diagnostics.kNullDefaultValue));
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properties.add(new DiagnosticsProperty<double?>("textScaleFactor", this.textScaleFactor,
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defaultValue: Diagnostics.kNullDefaultValue));
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properties.add(new DiagnosticsProperty<int?>("maxLines", this.maxLines, defaultValue: 1));
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properties.add(new DiagnosticsProperty<bool>("autofocus", this.autofocus, defaultValue: false));
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properties.add(new DiagnosticsProperty<TextInputType>("keyboardType", this.keyboardType, defaultValue: null));
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}
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}
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public class EditableTextState : AutomaticKeepAliveClientMixin<EditableText>, TextInputClient,
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TextSelectionDelegate {
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const int _kObscureShowLatestCharCursorTicks = 3;
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static TimeSpan _kCursorBlinkHalfPeriod = TimeSpan.FromMilliseconds(500);
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Timer _cursorTimer;
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ValueNotifier<bool> _showCursor = new ValueNotifier<bool>(false);
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GlobalKey _editableKey = GlobalKey.key();
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LayerLink _layerLink = new LayerLink();
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bool _didAutoFocus = false;
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public ScrollController _scrollController = new ScrollController();
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TextInputConnection _textInputConnection;
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TextSelectionOverlay _selectionOverlay;
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int _obscureShowCharTicksPending = 0;
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int _obscureLatestCharIndex;
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bool _textChangedSinceLastCaretUpdate = false;
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protected override bool wantKeepAlive {
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get { return this.widget.focusNode.hasFocus; }
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}
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public override void initState() {
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base.initState();
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this.widget.controller.addListener(this._didChangeTextEditingValue);
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this.widget.focusNode.addListener(this._handleFocusChanged);
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this._scrollController.addListener(() => { this._selectionOverlay?.updateForScroll(); });
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}
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public override void didChangeDependencies() {
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base.didChangeDependencies();
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if (!this._didAutoFocus && this.widget.autofocus) {
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FocusScope.of(this.context).autofocus(this.widget.focusNode);
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this._didAutoFocus = true;
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}
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}
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public override void didUpdateWidget(StatefulWidget old) {
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EditableText oldWidget = (EditableText) old;
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base.didUpdateWidget(oldWidget);
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if (this.widget.controller != oldWidget.controller) {
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oldWidget.controller.removeListener(this._didChangeTextEditingValue);
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this.widget.controller.addListener(this._didChangeTextEditingValue);
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this._updateRemoteEditingValueIfNeeded();
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}
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if (this.widget.focusNode != oldWidget.focusNode) {
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oldWidget.focusNode.removeListener(this._handleFocusChanged);
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this.widget.focusNode.addListener(this._handleFocusChanged);
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this.updateKeepAlive();
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}
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}
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public override void dispose() {
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this.widget.controller.removeListener(this._didChangeTextEditingValue);
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this._closeInputConnectionIfNeeded();
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D.assert(!this._hasInputConnection);
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this._stopCursorTimer();
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D.assert(this._cursorTimer == null);
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this._selectionOverlay?.dispose();
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this._selectionOverlay = null;
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this.widget.focusNode.removeListener(this._handleFocusChanged);
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base.dispose();
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}
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TextEditingValue _lastKnownRemoteTextEditingValue;
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public void updateEditingValue(TextEditingValue value) {
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if (value.text != this._value.text) {
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this._hideSelectionOverlayIfNeeded();
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this._showCaretOnScreen();
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if (this.widget.obscureText && value.text.Length == this._value.text.Length + 1) {
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this._obscureShowCharTicksPending = _kObscureShowLatestCharCursorTicks;
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this._obscureLatestCharIndex = this._value.selection.baseOffset;
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}
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}
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this._lastKnownRemoteTextEditingValue = value;
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this._formatAndSetValue(value);
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}
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public TextEditingValue getValueForAction(TextInputAction operation) {
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TextPosition newPosition = null;
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TextPosition newExtend = null;
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TextEditingValue newValue = null;
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TextSelection newSelection = null;
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TextPosition startPos = new TextPosition(this._value.selection.start, this._value.selection.affinity);
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switch (operation) {
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case TextInputAction.moveLeft:
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newValue = this._value.moveLeft();
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break;
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case TextInputAction.moveRight:
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newValue = this._value.moveRight();
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break;
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case TextInputAction.moveUp:
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newPosition = this.renderEditable.getPositionUp(startPos);
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break;
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case TextInputAction.moveDown:
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newPosition = this.renderEditable.getPositionDown(startPos);
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break;
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case TextInputAction.moveLineStart:
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newPosition = this.renderEditable.getParagraphStart(startPos, TextAffinity.downstream);
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break;
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case TextInputAction.moveLineEnd:
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newPosition = this.renderEditable.getParagraphEnd(startPos, TextAffinity.upstream);
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break;
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case TextInputAction.moveWordRight:
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newPosition = this.renderEditable.getWordRight(startPos);
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break;
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case TextInputAction.moveWordLeft:
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newPosition = this.renderEditable.getWordLeft(startPos);
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break;
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// case TextInputAction.MoveToStartOfNextWord: MoveToStartOfNextWord(); break;
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// case TextInputAction.MoveToEndOfPreviousWord: MoveToEndOfPreviousWord(); break;
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case TextInputAction.moveTextStart:
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newPosition = new TextPosition(0);
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break;
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case TextInputAction.moveTextEnd:
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newPosition = new TextPosition(this._value.text.Length);
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break;
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case TextInputAction.moveParagraphForward:
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newPosition = this.renderEditable.getParagraphForward(startPos);
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break;
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case TextInputAction.moveParagraphBackward:
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newPosition = this.renderEditable.getParagraphBackward(startPos);
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break;
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case TextInputAction.moveGraphicalLineStart:
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newPosition = this.renderEditable.getLineStartPosition(startPos, TextAffinity.downstream);
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break;
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case TextInputAction.moveGraphicalLineEnd:
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newPosition = this.renderEditable.getLineEndPosition(startPos, TextAffinity.upstream);
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break;
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case TextInputAction.selectLeft:
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newValue = this._value.extendLeft();
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break;
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case TextInputAction.selectRight:
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newValue = this._value.extendRight();
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break;
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case TextInputAction.selectUp:
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newExtend = this.renderEditable.getPositionUp(this._value.selection.extendPos);
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break;
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case TextInputAction.selectDown:
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newExtend = this.renderEditable.getPositionDown(this._value.selection.extendPos);
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break;
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case TextInputAction.selectWordRight:
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newExtend = this.renderEditable.getWordRight(this._value.selection.extendPos);
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break;
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case TextInputAction.selectWordLeft:
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newExtend = this.renderEditable.getWordLeft(this._value.selection.extendPos);
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break;
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// case TextInputAction.SelectToEndOfPreviousWord: SelectToEndOfPreviousWord(); break;
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// case TextInputAction.SelectToStartOfNextWord: SelectToStartOfNextWord(); break;
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//
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case TextInputAction.selectTextStart:
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newExtend = new TextPosition(0);
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break;
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case TextInputAction.selectTextEnd:
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newExtend = new TextPosition(this._value.text.Length);
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break;
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case TextInputAction.expandSelectGraphicalLineStart:
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if (this._value.selection.isCollapsed ||
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!this.renderEditable.isLineEndOrStart(this._value.selection.start)) {
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newSelection = new TextSelection(this.renderEditable.getLineStartPosition(startPos).offset,
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this._value.selection.end, this._value.selection.affinity);
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}
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break;
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case TextInputAction.expandSelectGraphicalLineEnd:
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if (this._value.selection.isCollapsed ||
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!this.renderEditable.isLineEndOrStart(this._value.selection.end)) {
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newSelection = new TextSelection(this._value.selection.start,
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this.renderEditable.getLineEndPosition(this._value.selection.endPos).offset,
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this._value.selection.affinity);
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}
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break;
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case TextInputAction.selectParagraphForward:
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newExtend = this.renderEditable.getParagraphForward(this._value.selection.extendPos);
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break;
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case TextInputAction.selectParagraphBackward:
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newExtend = this.renderEditable.getParagraphBackward(this._value.selection.extendPos);
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break;
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case TextInputAction.selectGraphicalLineStart:
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newExtend = this.renderEditable.getLineStartPosition(this._value.selection.extendPos);
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break;
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case TextInputAction.selectGraphicalLineEnd:
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newExtend = this.renderEditable.getLineEndPosition(startPos);
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break;
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case TextInputAction.delete:
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newValue = this._value.deleteSelection(false);
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break;
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case TextInputAction.backspace:
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newValue = this._value.deleteSelection();
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break;
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case TextInputAction.selectAll:
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newSelection = this._value.selection.copyWith(baseOffset: 0, extentOffset: this._value.text.Length);
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break;
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}
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if (newPosition != null) {
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return this._value.copyWith(selection: TextSelection.fromPosition(newPosition));
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}
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else if (newExtend != null) {
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return this._value.copyWith(selection: this._value.selection.copyWith(extentOffset: newExtend.offset));
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}
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else if (newSelection != null) {
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return this._value.copyWith(selection: newSelection);
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}
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else if (newValue != null) {
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return newValue;
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}
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return this._value;
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}
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public void performAction(TextInputAction action) {
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TextEditingValue newValue;
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switch (action) {
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case TextInputAction.newline:
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if (this.widget.maxLines == 1) {
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this._finalizeEditing(true);
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}
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break;
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case TextInputAction.done:
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case TextInputAction.go:
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case TextInputAction.send:
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case TextInputAction.search:
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this._finalizeEditing(true);
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break;
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case TextInputAction.next:
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case TextInputAction.previous:
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case TextInputAction.continueAction:
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case TextInputAction.join:
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case TextInputAction.route:
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case TextInputAction.emergencyCall:
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this._finalizeEditing(false);
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break;
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default:
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newValue = this.getValueForAction(action);
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if (newValue != this.textEditingValue) {
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this.textEditingValue = newValue;
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}
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break;
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}
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}
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void _finalizeEditing(bool shouldUnfocus) {
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if (this.widget.onEditingComplete != null) {
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this.widget.onEditingComplete();
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}
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else {
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this.widget.controller.clearComposing();
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if (shouldUnfocus) {
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this.widget.focusNode.unfocus();
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}
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}
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if (this.widget.onSubmitted != null) {
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this.widget.onSubmitted(this._value.text);
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}
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}
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void _updateRemoteEditingValueIfNeeded() {
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if (!this._hasInputConnection) {
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return;
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}
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var localValue = this._value;
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if (localValue == this._lastKnownRemoteTextEditingValue) {
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return;
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}
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this._lastKnownRemoteTextEditingValue = localValue;
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this._textInputConnection.setEditingState(localValue);
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}
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// Calculate the new scroll offset so the cursor remains visible.
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double _getScrollOffsetForCaret(Rect caretRect) {
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double caretStart = this._isMultiline ? caretRect.top : caretRect.left;
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double caretEnd = this._isMultiline ? caretRect.bottom : caretRect.right;
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double scrollOffset = this._scrollController.offset;
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double viewportExtent = this._scrollController.position.viewportDimension;
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if (caretStart < 0.0) {
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scrollOffset += caretStart;
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}
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else if (caretEnd >= viewportExtent) {
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scrollOffset += caretEnd - viewportExtent;
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}
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return scrollOffset;
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}
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// Calculates where the `caretRect` would be if `_scrollController.offset` is set to `scrollOffset`.
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Rect _getCaretRectAtScrollOffset(Rect caretRect, double scrollOffset) {
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double offsetDiff = this._scrollController.offset - scrollOffset;
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return this._isMultiline ? caretRect.translate(0.0, offsetDiff) : caretRect.translate(offsetDiff, 0.0);
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}
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bool _hasInputConnection {
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get { return this._textInputConnection != null && this._textInputConnection.attached; }
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}
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void _openInputConnection() {
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if (!this._hasInputConnection) {
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TextEditingValue localValue = this._value;
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this._lastKnownRemoteTextEditingValue = localValue;
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this._textInputConnection = Window.instance.textInput.attach(this, new TextInputConfiguration(
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inputType: this.widget.keyboardType,
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obscureText: this.widget.obscureText,
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autocorrect: this.widget.autocorrect,
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inputAction: this.widget.textInputAction ?? ((this.widget.keyboardType == TextInputType.multiline) ?
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TextInputAction.newline: TextInputAction.done)
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));
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this._textInputConnection.setEditingState(localValue);
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}
|
|
this._textInputConnection.show();
|
|
}
|
|
|
|
void _closeInputConnectionIfNeeded() {
|
|
if (this._hasInputConnection) {
|
|
this._textInputConnection.close();
|
|
this._textInputConnection = null;
|
|
this._lastKnownRemoteTextEditingValue = null;
|
|
}
|
|
}
|
|
|
|
void _openOrCloseInputConnectionIfNeeded() {
|
|
if (this._hasFocus && this.widget.focusNode.consumeKeyboardToken()) {
|
|
this._openInputConnection();
|
|
}
|
|
else if (!this._hasFocus) {
|
|
this._closeInputConnectionIfNeeded();
|
|
this.widget.controller.clearComposing();
|
|
}
|
|
}
|
|
|
|
public void requestKeyboard() {
|
|
if (this._hasFocus) {
|
|
this._openInputConnection();
|
|
}
|
|
else {
|
|
FocusScope.of(this.context).requestFocus(this.widget.focusNode);
|
|
}
|
|
}
|
|
|
|
void _hideSelectionOverlayIfNeeded() {
|
|
this._selectionOverlay?.hide();
|
|
this._selectionOverlay = null;
|
|
}
|
|
|
|
void _updateOrDisposeSelectionOverlayIfNeeded() {
|
|
if (this._selectionOverlay != null) {
|
|
if (this._hasFocus) {
|
|
this._selectionOverlay.update(this._value);
|
|
}
|
|
else {
|
|
this._selectionOverlay.dispose();
|
|
this._selectionOverlay = null;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void _handleSelectionChanged(TextSelection selection, RenderEditable renderObject,
|
|
SelectionChangedCause cause) {
|
|
this.widget.controller.selection = selection;
|
|
this.requestKeyboard();
|
|
|
|
this._hideSelectionOverlayIfNeeded();
|
|
|
|
if (this.widget.selectionControls != null) {
|
|
this._selectionOverlay = new TextSelectionOverlay(
|
|
context: this.context,
|
|
value: this._value,
|
|
debugRequiredFor: this.widget,
|
|
layerLink: this._layerLink,
|
|
renderObject: renderObject,
|
|
selectionControls: this.widget.selectionControls,
|
|
selectionDelegate: this
|
|
);
|
|
bool longPress = cause == SelectionChangedCause.longPress;
|
|
if (cause != SelectionChangedCause.keyboard && (this._value.text.isNotEmpty() || longPress)) {
|
|
this._selectionOverlay.showHandles();
|
|
}
|
|
|
|
if (longPress || cause == SelectionChangedCause.doubleTap) {
|
|
this._selectionOverlay.showToolbar();
|
|
}
|
|
}
|
|
|
|
if (this.widget.onSelectionChanged != null) {
|
|
this.widget.onSelectionChanged(selection, cause);
|
|
}
|
|
}
|
|
|
|
Rect _currentCaretRect;
|
|
|
|
void _handleCaretChanged(Rect caretRect) {
|
|
this._currentCaretRect = caretRect;
|
|
// If the caret location has changed due to an update to the text or
|
|
// selection, then scroll the caret into view.
|
|
if (this._textChangedSinceLastCaretUpdate) {
|
|
this._textChangedSinceLastCaretUpdate = false;
|
|
this._showCaretOnScreen();
|
|
}
|
|
}
|
|
|
|
// Animation configuration for scrolling the caret back on screen.
|
|
static readonly TimeSpan _caretAnimationDuration = TimeSpan.FromMilliseconds(100);
|
|
static readonly Curve _caretAnimationCurve = Curves.fastOutSlowIn;
|
|
bool _showCaretOnScreenScheduled = false;
|
|
|
|
void _showCaretOnScreen() {
|
|
if (this._showCaretOnScreenScheduled) {
|
|
return;
|
|
}
|
|
|
|
this._showCaretOnScreenScheduled = true;
|
|
SchedulerBinding.instance.addPostFrameCallback(_ => {
|
|
this._showCaretOnScreenScheduled = false;
|
|
if (this._currentCaretRect == null || !this._scrollController.hasClients) {
|
|
return;
|
|
}
|
|
|
|
double scrollOffsetForCaret = this._getScrollOffsetForCaret(this._currentCaretRect);
|
|
this._scrollController.animateTo(scrollOffsetForCaret,
|
|
duration: _caretAnimationDuration,
|
|
curve: _caretAnimationCurve);
|
|
|
|
Rect newCaretRect = this._getCaretRectAtScrollOffset(this._currentCaretRect, scrollOffsetForCaret);
|
|
// Enlarge newCaretRect by scrollPadding to ensure that caret is not positioned directly at the edge after scrolling.
|
|
Rect inflatedRect = Rect.fromLTRB(
|
|
newCaretRect.left - this.widget.scrollPadding.left,
|
|
newCaretRect.top - this.widget.scrollPadding.top,
|
|
newCaretRect.right + this.widget.scrollPadding.right,
|
|
newCaretRect.bottom + this.widget.scrollPadding.bottom
|
|
);
|
|
this._editableKey.currentContext.findRenderObject().showOnScreen(
|
|
rect: inflatedRect,
|
|
duration: _caretAnimationDuration,
|
|
curve: _caretAnimationCurve
|
|
);
|
|
});
|
|
}
|
|
|
|
void _formatAndSetValue(TextEditingValue value) {
|
|
var textChanged = (this._value == null ? null : this._value.text) != (value == null ? null : value.text);
|
|
if (this.widget.inputFormatters != null && this.widget.inputFormatters.isNotEmpty()) {
|
|
foreach (var formatter in this.widget.inputFormatters) {
|
|
value = formatter.formatEditUpdate(this._value, value);
|
|
}
|
|
|
|
this._value = value;
|
|
this._updateRemoteEditingValueIfNeeded();
|
|
}
|
|
else {
|
|
this._value = value;
|
|
}
|
|
|
|
if (textChanged && this.widget.onChanged != null) {
|
|
this.widget.onChanged(value.text);
|
|
}
|
|
}
|
|
|
|
public bool cursorCurrentlyVisible {
|
|
get { return this._showCursor.value; }
|
|
}
|
|
|
|
public TimeSpan cursorBlinkInterval {
|
|
get { return _kCursorBlinkHalfPeriod; }
|
|
}
|
|
|
|
void _cursorTick() {
|
|
this._showCursor.value = !this._showCursor.value;
|
|
if (this._obscureShowCharTicksPending > 0) {
|
|
this.setState(() => { this._obscureShowCharTicksPending--; });
|
|
}
|
|
}
|
|
|
|
void _startCursorTimer() {
|
|
this._showCursor.value = true;
|
|
this._cursorTimer = Window.instance.run(_kCursorBlinkHalfPeriod, this._cursorTick,
|
|
periodic: true);
|
|
}
|
|
|
|
void _stopCursorTimer() {
|
|
if (this._cursorTimer != null) {
|
|
this._cursorTimer.cancel();
|
|
}
|
|
|
|
this._cursorTimer = null;
|
|
this._showCursor.value = false;
|
|
this._obscureShowCharTicksPending = 0;
|
|
}
|
|
|
|
void _startOrStopCursorTimerIfNeeded() {
|
|
if (this._cursorTimer == null && this._hasFocus && this._value.selection.isCollapsed &&
|
|
!Window.instance.textInput.keyboardManager.textInputOnKeyboard()) {
|
|
this._startCursorTimer();
|
|
}
|
|
else if (this._cursorTimer != null && (!this._hasFocus || !this._value.selection.isCollapsed)) {
|
|
this._stopCursorTimer();
|
|
}
|
|
}
|
|
|
|
TextEditingValue _value {
|
|
get { return this.widget.controller.value; }
|
|
set { this.widget.controller.value = value; }
|
|
}
|
|
|
|
bool _hasFocus {
|
|
get { return this.widget.focusNode.hasFocus; }
|
|
}
|
|
|
|
bool _isMultiline {
|
|
get { return this.widget.maxLines != 1; }
|
|
}
|
|
|
|
void _didChangeTextEditingValue() {
|
|
this._updateRemoteEditingValueIfNeeded();
|
|
this._startOrStopCursorTimerIfNeeded();
|
|
this._updateOrDisposeSelectionOverlayIfNeeded();
|
|
this._textChangedSinceLastCaretUpdate = true;
|
|
this.setState(() => { });
|
|
}
|
|
|
|
void _handleFocusChanged() {
|
|
this._openOrCloseInputConnectionIfNeeded();
|
|
this._startOrStopCursorTimerIfNeeded();
|
|
this._updateOrDisposeSelectionOverlayIfNeeded();
|
|
if (!this._hasFocus) {
|
|
this._value = new TextEditingValue(text: this._value.text);
|
|
}
|
|
else if (!this._value.selection.isValid) {
|
|
this.widget.controller.selection = TextSelection.collapsed(offset: this._value.text.Length);
|
|
}
|
|
|
|
this.updateKeepAlive();
|
|
}
|
|
|
|
|
|
TextDirection? _textDirection {
|
|
get {
|
|
TextDirection? result = this.widget.textDirection ?? Directionality.of(this.context);
|
|
D.assert(result != null,
|
|
$"{this.GetType().FullName} created without a textDirection and with no ambient Directionality.");
|
|
return result;
|
|
}
|
|
}
|
|
|
|
public RenderEditable renderEditable {
|
|
get { return (RenderEditable) this._editableKey.currentContext.findRenderObject(); }
|
|
}
|
|
|
|
public TextEditingValue textEditingValue {
|
|
get { return this._value; }
|
|
set {
|
|
this._selectionOverlay?.update(value);
|
|
this._formatAndSetValue(value);
|
|
}
|
|
}
|
|
|
|
public void bringIntoView(TextPosition position) {
|
|
this._scrollController.jumpTo(
|
|
this._getScrollOffsetForCaret(this.renderEditable.getLocalRectForCaret(position)));
|
|
}
|
|
|
|
public void hideToolbar() {
|
|
this._selectionOverlay?.hide();
|
|
}
|
|
|
|
public override Widget build(BuildContext context) {
|
|
FocusScope.of(context).reparentIfNeeded(this.widget.focusNode);
|
|
base.build(context); // See AutomaticKeepAliveClientMixin.
|
|
|
|
return new Scrollable(
|
|
axisDirection: this._isMultiline ? AxisDirection.down : AxisDirection.right,
|
|
controller: this._scrollController,
|
|
physics: new ClampingScrollPhysics(),
|
|
viewportBuilder: (BuildContext _context, ViewportOffset offset) =>
|
|
new CompositedTransformTarget(
|
|
link: this._layerLink,
|
|
child: new _Editable(
|
|
key: this._editableKey,
|
|
textSpan: this.buildTextSpan(),
|
|
value: this._value,
|
|
cursorColor: this.widget.cursorColor,
|
|
showCursor: this._showCursor,
|
|
hasFocus: this._hasFocus,
|
|
maxLines: this.widget.maxLines,
|
|
selectionColor: this.widget.selectionColor,
|
|
textScaleFactor: this.widget.textScaleFactor ?? MediaQuery.textScaleFactorOf(context),
|
|
textAlign: this.widget.textAlign,
|
|
textDirection: this._textDirection,
|
|
obscureText: this.widget.obscureText,
|
|
autocorrect: this.widget.autocorrect,
|
|
offset: offset,
|
|
onSelectionChanged: this._handleSelectionChanged,
|
|
onCaretChanged: this._handleCaretChanged,
|
|
rendererIgnoresPointer: this.widget.rendererIgnoresPointer
|
|
)
|
|
)
|
|
);
|
|
}
|
|
|
|
public TextSpan buildTextSpan() {
|
|
if (!this.widget.obscureText && this._value.composing.isValid) {
|
|
TextStyle composingStyle = this.widget.style.merge(
|
|
new TextStyle(decoration: TextDecoration.underline)
|
|
);
|
|
|
|
return new TextSpan(
|
|
style: this.widget.style,
|
|
children: new List<TextSpan> {
|
|
new TextSpan(text: this._value.composing.textBefore(this._value.text)),
|
|
new TextSpan(
|
|
style: composingStyle,
|
|
text: this._value.composing.textInside(this._value.text)
|
|
),
|
|
new TextSpan(text: this._value.composing.textAfter(this._value.text)),
|
|
});
|
|
}
|
|
|
|
var text = this._value.text;
|
|
if (this.widget.obscureText) {
|
|
text = new string(RenderEditable.obscuringCharacter, text.Length);
|
|
int o = this._obscureShowCharTicksPending > 0 ? this._obscureLatestCharIndex : -1;
|
|
if (!Window.instance.textInput.keyboardManager.textInputOnKeyboard() && o >= 0 && o < text.Length) {
|
|
text = text.Substring(0, o) + this._value.text.Substring(o, 1) + text.Substring(o + 1);
|
|
}
|
|
}
|
|
|
|
return new TextSpan(style: this.widget.style, text: text);
|
|
}
|
|
}
|
|
|
|
|
|
class _Editable : LeafRenderObjectWidget {
|
|
public readonly TextSpan textSpan;
|
|
public readonly TextEditingValue value;
|
|
public readonly Color cursorColor;
|
|
public readonly ValueNotifier<bool> showCursor;
|
|
public readonly bool hasFocus;
|
|
public readonly int? maxLines;
|
|
public readonly Color selectionColor;
|
|
public readonly double textScaleFactor;
|
|
public readonly TextAlign textAlign;
|
|
public readonly TextDirection? textDirection;
|
|
public readonly bool obscureText;
|
|
public readonly bool autocorrect;
|
|
public readonly ViewportOffset offset;
|
|
public readonly SelectionChangedHandler onSelectionChanged;
|
|
public readonly CaretChangedHandler onCaretChanged;
|
|
public readonly bool rendererIgnoresPointer;
|
|
|
|
|
|
public _Editable(TextSpan textSpan = null, TextEditingValue value = null,
|
|
Color cursorColor = null, ValueNotifier<bool> showCursor = null, bool hasFocus = false,
|
|
int? maxLines = null, Color selectionColor = null, double textScaleFactor = 1.0,
|
|
TextDirection? textDirection = null, bool obscureText = false, TextAlign textAlign = TextAlign.left,
|
|
bool autocorrect = false, ViewportOffset offset = null, SelectionChangedHandler onSelectionChanged = null,
|
|
CaretChangedHandler onCaretChanged = null, bool rendererIgnoresPointer = false,
|
|
Key key = null) : base(key) {
|
|
this.textSpan = textSpan;
|
|
this.value = value;
|
|
this.cursorColor = cursorColor;
|
|
this.showCursor = showCursor;
|
|
this.hasFocus = hasFocus;
|
|
this.maxLines = maxLines;
|
|
this.selectionColor = selectionColor;
|
|
this.textScaleFactor = textScaleFactor;
|
|
this.textAlign = textAlign;
|
|
this.textDirection = textDirection;
|
|
this.obscureText = obscureText;
|
|
this.autocorrect = autocorrect;
|
|
this.offset = offset;
|
|
this.onSelectionChanged = onSelectionChanged;
|
|
this.onCaretChanged = onCaretChanged;
|
|
this.rendererIgnoresPointer = rendererIgnoresPointer;
|
|
}
|
|
|
|
public override RenderObject createRenderObject(BuildContext context) {
|
|
return new RenderEditable(
|
|
text: this.textSpan,
|
|
textDirection: this.textDirection ?? TextDirection.ltr,
|
|
offset: this.offset,
|
|
showCursor: this.showCursor,
|
|
cursorColor: this.cursorColor,
|
|
hasFocus: this.hasFocus,
|
|
maxLines: this.maxLines,
|
|
selectionColor: this.selectionColor,
|
|
textScaleFactor: this.textScaleFactor,
|
|
textAlign: this.textAlign,
|
|
selection: this.value.selection,
|
|
obscureText: this.obscureText,
|
|
onSelectionChanged: this.onSelectionChanged,
|
|
onCaretChanged: this.onCaretChanged,
|
|
ignorePointer: this.rendererIgnoresPointer
|
|
);
|
|
}
|
|
|
|
public override void updateRenderObject(BuildContext context, RenderObject renderObject) {
|
|
var edit = (RenderEditable) renderObject;
|
|
edit.text = this.textSpan;
|
|
edit.cursorColor = this.cursorColor;
|
|
edit.showCursor = this.showCursor;
|
|
edit.hasFocus = this.hasFocus;
|
|
edit.maxLines = this.maxLines;
|
|
edit.selectionColor = this.selectionColor;
|
|
edit.textScaleFactor = this.textScaleFactor;
|
|
edit.textAlign = this.textAlign;
|
|
edit.textDirection = this.textDirection;
|
|
edit.selection = this.value.selection;
|
|
edit.offset = this.offset;
|
|
edit.onSelectionChanged = this.onSelectionChanged;
|
|
edit.onCaretChanged = this.onCaretChanged;
|
|
edit.ignorePointer = this.rendererIgnoresPointer;
|
|
edit.obscureText = this.obscureText;
|
|
}
|
|
}
|
|
}
|