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1182 行
51 KiB
1182 行
51 KiB
using System;
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using System.Collections.Generic;
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using RSG;
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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.gestures;
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using Unity.UIWidgets.material;
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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 UnityEngine;
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using Color = Unity.UIWidgets.ui.Color;
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using Rect = Unity.UIWidgets.ui.Rect;
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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 = null) : 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 static 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(
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text: value,
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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 EditableText(
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TextEditingController controller = null,
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FocusNode focusNode = null, TextStyle style = null,
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StrutStyle strutStyle = null,
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Color cursorColor = null,
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Color backgroundCursorColor = null,
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bool obscureText = false,
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bool autocorrect = false,
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TextAlign textAlign = TextAlign.left,
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TextDirection? textDirection = null,
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float? textScaleFactor = null,
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int? maxLines = 1,
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int? minLines = null,
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bool expands = false,
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bool autofocus = false,
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Color selectionColor = null,
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TextSelectionControls selectionControls = null,
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TextInputType keyboardType = null,
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TextInputAction? textInputAction = null,
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TextCapitalization textCapitalization = TextCapitalization.none,
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ValueChanged<string> onChanged = null,
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VoidCallback onEditingComplete = null,
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ValueChanged<string> onSubmitted = null,
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SelectionChangedCallback onSelectionChanged = null,
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List<TextInputFormatter> inputFormatters = null,
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bool rendererIgnoresPointer = false,
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EdgeInsets scrollPadding = null,
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bool unityTouchKeyboard = false,
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Key key = null,
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float? cursorWidth = 2.0f,
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Radius cursorRadius = null,
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bool cursorOpacityAnimates = false,
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Offset cursorOffset = null,
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bool paintCursorAboveText = false,
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Brightness? keyboardAppearance = Brightness.light,
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DragStartBehavior dragStartBehavior = DragStartBehavior.down,
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bool? enableInteractiveSelection = null,
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ScrollPhysics scrollPhysics = null,
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GlobalKeyEventHandlerDelegate globalKeyEventHandler = null
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) : 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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D.assert(minLines == null || minLines > 0);
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D.assert((maxLines == null) || (minLines == null) || (maxLines >= minLines),
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() => "minLines can't be greater than maxLines");
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D.assert(!expands || (maxLines == null && minLines == null),
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() => "minLines and maxLines must be null when expands is true.");
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// D.assert(backgroundCursorColor != null); // TODO: remove comment
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this.keyboardType = keyboardType ?? (maxLines == 1 ? TextInputType.text : TextInputType.multiline);
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this.scrollPadding = scrollPadding ?? EdgeInsets.all(20.0f);
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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._strutStyle = strutStyle;
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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.textCapitalization = textCapitalization;
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this.cursorColor = cursorColor;
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this.backgroundCursorColor = backgroundCursorColor ?? Colors.grey; // TODO: remove ??
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this.maxLines = maxLines;
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this.minLines = minLines;
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this.expands = expands;
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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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this.unityTouchKeyboard = unityTouchKeyboard;
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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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this.cursorWidth = cursorWidth;
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this.cursorRadius = cursorRadius;
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this.cursorOpacityAnimates = cursorOpacityAnimates;
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this.cursorOffset = cursorOffset;
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this.paintCursorAboveText = paintCursorAboveText;
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this.keyboardAppearance = keyboardAppearance;
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this.enableInteractiveSelection = enableInteractiveSelection;
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this.dragStartBehavior = dragStartBehavior;
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this.scrollPhysics = scrollPhysics;
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this.globalKeyEventHandler = globalKeyEventHandler;
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}
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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 StrutStyle strutStyle {
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get {
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if (this._strutStyle == null) {
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return this.style != null
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? StrutStyle.fromTextStyle(this.style, forceStrutHeight: true)
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: StrutStyle.disabled;
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}
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return this._strutStyle.inheritFromTextStyle(this.style);
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}
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}
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readonly StrutStyle _strutStyle;
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public readonly TextAlign textAlign;
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public readonly TextDirection? textDirection;
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public readonly TextCapitalization textCapitalization;
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public readonly float? textScaleFactor;
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public readonly Color cursorColor;
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public readonly Color backgroundCursorColor;
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public readonly int? maxLines;
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public readonly int? minLines;
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public readonly bool expands;
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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 readonly bool unityTouchKeyboard;
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public readonly float? cursorWidth;
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public readonly Radius cursorRadius;
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public readonly bool cursorOpacityAnimates;
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public readonly Offset cursorOffset;
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public readonly bool paintCursorAboveText;
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public readonly Brightness? keyboardAppearance;
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public readonly EdgeInsets scrollPadding;
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public readonly DragStartBehavior dragStartBehavior;
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public readonly bool? enableInteractiveSelection;
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public readonly ScrollPhysics scrollPhysics;
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public readonly GlobalKeyEventHandlerDelegate globalKeyEventHandler;
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public bool selectionEnabled {
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get { return this.enableInteractiveSelection ?? !this.obscureText; }
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}
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public override State createState() {
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return new EditableTextState();
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}
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public static bool debugDeterministicCursor = false;
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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<float?>("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<int?>("minLines", this.minLines,
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defaultValue: Diagnostics.kNullDefaultValue));
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properties.add(new DiagnosticsProperty<bool>("expands", this.expands, defaultValue: false));
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properties.add(new DiagnosticsProperty<bool>("autofocus", this.autofocus, defaultValue: false));
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properties.add(
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new DiagnosticsProperty<TextInputType>("keyboardType", this.keyboardType, defaultValue: null));
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properties.add(new DiagnosticsProperty<ScrollPhysics>("scrollPhysics", this.scrollPhysics,
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defaultValue: Diagnostics.kNullDefaultValue));
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}
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}
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public class EditableTextState : AutomaticKeepAliveClientWithTickerProviderStateMixin<EditableText>,
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WidgetsBindingObserver, 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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static TimeSpan _kCursorBlinkWaitForStart = TimeSpan.FromMilliseconds(150);
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Timer _cursorTimer;
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bool _targetCursorVisibility = false;
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ValueNotifier<bool> _cursorVisibilityNotifier = new ValueNotifier<bool>(false);
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GlobalKey _editableKey = GlobalKey.key();
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TextInputConnection _textInputConnection;
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TextSelectionOverlay _selectionOverlay;
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public ScrollController _scrollController = new ScrollController();
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AnimationController _cursorBlinkOpacityController;
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LayerLink _layerLink = new LayerLink();
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bool _didAutoFocus = false;
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static readonly TimeSpan _fadeDuration = TimeSpan.FromMilliseconds(250);
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static readonly TimeSpan _floatingCursorResetTime = TimeSpan.FromMilliseconds(125);
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AnimationController _floatingCursorResetController;
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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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Color _cursorColor {
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get { return this.widget.cursorColor.withOpacity(this._cursorBlinkOpacityController.value); }
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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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this._cursorBlinkOpacityController = new AnimationController(vsync: this, duration: _fadeDuration);
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this._cursorBlinkOpacityController.addListener(this._onCursorColorTick);
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this._floatingCursorResetController = new AnimationController(vsync: this);
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this._floatingCursorResetController.addListener(this._onFloatingCursorResetTick);
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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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this._updateImePosIfNeed();
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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._cursorBlinkOpacityController.removeListener(this._onCursorColorTick);
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this._floatingCursorResetController.removeListener(this._onFloatingCursorResetTick);
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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, bool isIMEInput) {
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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 = !this._unityKeyboard() ? _kObscureShowLatestCharCursorTicks : 0;
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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, isIMEInput);
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this._stopCursorTimer(resetCharTicks: false);
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this._startCursorTimer();
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}
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public void performAction(TextInputAction action) {
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switch (action) {
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case TextInputAction.newline:
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if (!this._isMultiline) {
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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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default:
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this._finalizeEditing(false);
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break;
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}
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}
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Rect _startCaretRect;
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TextPosition _lastTextPosition;
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Offset _pointOffsetOrigin;
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Offset _lastBoundedOffset;
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Offset _floatingCursorOffset {
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get { return new Offset(0, this.renderEditable.preferredLineHeight / 2); }
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}
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public void updateFloatingCursor(RawFloatingCursorPoint point) {
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switch (point.state) {
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case FloatingCursorDragState.Start:
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if (this._floatingCursorResetController.isAnimating) {
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this._floatingCursorResetController.stop();
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this._onFloatingCursorResetTick();
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}
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TextPosition currentTextPosition =
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new TextPosition(offset: this.renderEditable.selection.baseOffset);
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this._startCaretRect = this.renderEditable.getLocalRectForCaret(currentTextPosition);
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this.renderEditable.setFloatingCursor(point.state,
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this._startCaretRect.center - this._floatingCursorOffset, currentTextPosition);
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break;
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case FloatingCursorDragState.Update:
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// We want to send in points that are centered around a (0,0) origin, so we cache the
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// position on the first update call.
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if (this._pointOffsetOrigin != null) {
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Offset centeredPoint = point.offset - this._pointOffsetOrigin;
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Offset rawCursorOffset =
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this._startCaretRect.center + centeredPoint - this._floatingCursorOffset;
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this._lastBoundedOffset =
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this.renderEditable.calculateBoundedFloatingCursorOffset(rawCursorOffset);
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this._lastTextPosition = this.renderEditable.getPositionForPoint(
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this.renderEditable.localToGlobal(this._lastBoundedOffset + this._floatingCursorOffset));
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this.renderEditable.setFloatingCursor(point.state, this._lastBoundedOffset,
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this._lastTextPosition);
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}
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else {
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this._pointOffsetOrigin = point.offset;
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}
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break;
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case FloatingCursorDragState.End:
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this._floatingCursorResetController.setValue(0.0f);
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this._floatingCursorResetController.animateTo(1.0f, duration: _floatingCursorResetTime,
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curve: Curves.decelerate);
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break;
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}
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}
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public RawInputKeyResponse globalInputKeyHandler(RawKeyEvent evt) {
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return this.widget.globalKeyEventHandler?.Invoke(evt, true) ?? RawInputKeyResponse.convert(evt);
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}
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void _onFloatingCursorResetTick() {
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Offset finalPosition = this.renderEditable.getLocalRectForCaret(this._lastTextPosition).centerLeft -
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this._floatingCursorOffset;
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if (this._floatingCursorResetController.isCompleted) {
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this.renderEditable.setFloatingCursor(FloatingCursorDragState.End, finalPosition,
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this._lastTextPosition);
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if (this._lastTextPosition.offset != this.renderEditable.selection.baseOffset) {
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this._handleSelectionChanged(TextSelection.collapsed(offset: this._lastTextPosition.offset),
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this.renderEditable, SelectionChangedCause.forcePress);
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}
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this._startCaretRect = null;
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this._lastTextPosition = null;
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this._pointOffsetOrigin = null;
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this._lastBoundedOffset = null;
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}
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else {
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float lerpValue = this._floatingCursorResetController.value;
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float lerpX = MathUtils.lerpFloat(this._lastBoundedOffset.dx, finalPosition.dx, lerpValue);
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float lerpY = MathUtils.lerpFloat(this._lastBoundedOffset.dy, finalPosition.dy, lerpValue);
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this.renderEditable.setFloatingCursor(FloatingCursorDragState.Update, new Offset(lerpX, lerpY),
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this._lastTextPosition, resetLerpValue: lerpValue);
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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;
|
|
if (localValue == this._lastKnownRemoteTextEditingValue) {
|
|
return;
|
|
}
|
|
|
|
this._lastKnownRemoteTextEditingValue = localValue;
|
|
this._textInputConnection.setEditingState(localValue);
|
|
}
|
|
|
|
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; }
|
|
}
|
|
|
|
// Calculate the new scroll offset so the cursor remains visible.
|
|
float _getScrollOffsetForCaret(Rect caretRect) {
|
|
float caretStart;
|
|
float caretEnd;
|
|
if (this._isMultiline) {
|
|
// The caret is vertically centered within the line. Expand the caret's
|
|
// height so that it spans the line because we're going to ensure that the entire
|
|
// expanded caret is scrolled into view.
|
|
float lineHeight = this.renderEditable.preferredLineHeight;
|
|
float caretOffset = (lineHeight - caretRect.height) / 2;
|
|
caretStart = caretRect.top - caretOffset;
|
|
caretEnd = caretRect.bottom + caretOffset;
|
|
}
|
|
else {
|
|
caretStart = caretRect.left;
|
|
caretEnd = caretRect.right;
|
|
}
|
|
|
|
float scrollOffset = this._scrollController.offset;
|
|
float viewportExtent = this._scrollController.position.viewportDimension;
|
|
if (caretStart < 0.0) {
|
|
scrollOffset += caretStart;
|
|
}
|
|
else if (caretEnd >= viewportExtent) {
|
|
scrollOffset += caretEnd - viewportExtent;
|
|
}
|
|
|
|
return scrollOffset;
|
|
}
|
|
|
|
// Calculates where the `caretRect` would be if `_scrollController.offset` is set to `scrollOffset`.
|
|
Rect _getCaretRectAtScrollOffset(Rect caretRect, float scrollOffset) {
|
|
float offsetDiff = this._scrollController.offset - scrollOffset;
|
|
return this._isMultiline ? caretRect.translate(0.0f, offsetDiff) : caretRect.translate(offsetDiff, 0.0f);
|
|
}
|
|
|
|
bool _hasInputConnection {
|
|
get { return this._textInputConnection != null && this._textInputConnection.attached; }
|
|
}
|
|
|
|
void _openInputConnection() {
|
|
if (!this._hasInputConnection) {
|
|
TextEditingValue localValue = this._value;
|
|
this._lastKnownRemoteTextEditingValue = localValue;
|
|
this._textInputConnection = TextInput.attach(this, new TextInputConfiguration(
|
|
inputType: this.widget.keyboardType,
|
|
obscureText: this.widget.obscureText,
|
|
autocorrect: this.widget.autocorrect,
|
|
inputAction: this.widget.textInputAction ?? ((this.widget.keyboardType == TextInputType.multiline)
|
|
? TextInputAction.newline
|
|
: TextInputAction.done),
|
|
textCapitalization: this.widget.textCapitalization,
|
|
keyboardAppearance: this.widget.keyboardAppearance ?? Brightness.light,
|
|
unityTouchKeyboard: this.widget.unityTouchKeyboard
|
|
));
|
|
this._textInputConnection.setEditingState(localValue);
|
|
this._updateImePosIfNeed();
|
|
}
|
|
|
|
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 {
|
|
List<FocusScopeNode> ancestorScopes = FocusScope.ancestorsOf(this.context);
|
|
for (int i = ancestorScopes.Count - 1; i >= 1; i -= 1) {
|
|
ancestorScopes[i].setFirstFocus(ancestorScopes[i - 1]);
|
|
}
|
|
|
|
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 && Application.isMobilePlatform && !this._unityKeyboard()) {
|
|
this._selectionOverlay = new TextSelectionOverlay(
|
|
context: this.context,
|
|
value: this._value,
|
|
debugRequiredFor: this.widget,
|
|
layerLink: this._layerLink,
|
|
renderObject: renderObject,
|
|
selectionControls: this.widget.selectionControls,
|
|
selectionDelegate: this,
|
|
dragStartBehavior: this.widget.dragStartBehavior
|
|
);
|
|
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);
|
|
}
|
|
}
|
|
|
|
bool _textChangedSinceLastCaretUpdate = false;
|
|
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;
|
|
}
|
|
|
|
float 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
|
|
);
|
|
});
|
|
}
|
|
|
|
|
|
double _lastBottomViewInset;
|
|
|
|
public void didChangeMetrics() {
|
|
if (this._lastBottomViewInset < Window.instance.viewInsets.bottom) {
|
|
this._showCaretOnScreen();
|
|
}
|
|
|
|
this._lastBottomViewInset = Window.instance.viewInsets.bottom;
|
|
}
|
|
|
|
public void didChangeTextScaleFactor() {
|
|
}
|
|
|
|
public void didChangePlatformBrightness() {
|
|
}
|
|
|
|
public void didChangeLocales(List<Locale> locale) {
|
|
}
|
|
|
|
public IPromise<bool> didPopRoute() {
|
|
return Promise<bool>.Resolved(false);
|
|
}
|
|
|
|
public IPromise<bool> didPushRoute(string route) {
|
|
return Promise<bool>.Resolved(false);
|
|
}
|
|
|
|
void _formatAndSetValue(TextEditingValue value, bool isIMEInput = false) {
|
|
var textChanged = this._value?.text != value?.text || isIMEInput;
|
|
if (textChanged && 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();
|
|
this._updateImePosIfNeed();
|
|
}
|
|
else {
|
|
this._value = value;
|
|
}
|
|
|
|
if (textChanged && this.widget.onChanged != null) {
|
|
this.widget.onChanged(value.text);
|
|
}
|
|
}
|
|
|
|
void _onCursorColorTick() {
|
|
this.renderEditable.cursorColor =
|
|
this.widget.cursorColor.withOpacity(this._cursorBlinkOpacityController.value);
|
|
this._cursorVisibilityNotifier.value = this._cursorBlinkOpacityController.value > 0;
|
|
}
|
|
|
|
public bool cursorCurrentlyVisible {
|
|
get { return this._cursorBlinkOpacityController.value > 0; }
|
|
}
|
|
|
|
public TimeSpan cursorBlinkInterval {
|
|
get { return _kCursorBlinkHalfPeriod; }
|
|
}
|
|
|
|
public TextSelectionOverlay selectionOverlay {
|
|
get { return this._selectionOverlay; }
|
|
}
|
|
|
|
int _obscureShowCharTicksPending = 0;
|
|
int _obscureLatestCharIndex;
|
|
|
|
void _cursorTick() {
|
|
this._targetCursorVisibility = !this._unityKeyboard() && !this._targetCursorVisibility;
|
|
float targetOpacity = this._targetCursorVisibility ? 1.0f : 0.0f;
|
|
if (this.widget.cursorOpacityAnimates) {
|
|
this._cursorBlinkOpacityController.animateTo(targetOpacity, curve: Curves.easeOut);
|
|
}
|
|
else {
|
|
this._cursorBlinkOpacityController.setValue(targetOpacity);
|
|
}
|
|
|
|
if (this._obscureShowCharTicksPending > 0) {
|
|
this.setState(() => { this._obscureShowCharTicksPending--; });
|
|
}
|
|
}
|
|
|
|
void _cursorWaitForStart() {
|
|
D.assert(_kCursorBlinkHalfPeriod > _fadeDuration);
|
|
this._cursorTimer?.cancel();
|
|
this._cursorTimer = Window.instance.run(_kCursorBlinkHalfPeriod, this._cursorTick, periodic: true);
|
|
}
|
|
|
|
void _startCursorTimer() {
|
|
this._targetCursorVisibility = true;
|
|
this._cursorBlinkOpacityController.setValue(1.0f);
|
|
if (EditableText.debugDeterministicCursor) {
|
|
return;
|
|
}
|
|
|
|
if (this.widget.cursorOpacityAnimates) {
|
|
this._cursorTimer =
|
|
Window.instance.run(_kCursorBlinkWaitForStart, this._cursorWaitForStart, periodic: true);
|
|
}
|
|
else {
|
|
this._cursorTimer = Window.instance.run(_kCursorBlinkHalfPeriod, this._cursorTick, periodic: true);
|
|
}
|
|
}
|
|
|
|
void _stopCursorTimer(bool resetCharTicks = true) {
|
|
this._cursorTimer?.cancel();
|
|
this._cursorTimer = null;
|
|
this._targetCursorVisibility = false;
|
|
this._cursorBlinkOpacityController.setValue(0.0f);
|
|
if (EditableText.debugDeterministicCursor) {
|
|
return;
|
|
}
|
|
|
|
if (resetCharTicks) {
|
|
this._obscureShowCharTicksPending = 0;
|
|
}
|
|
|
|
if (this.widget.cursorOpacityAnimates) {
|
|
this._cursorBlinkOpacityController.stop();
|
|
this._cursorBlinkOpacityController.setValue(0.0f);
|
|
}
|
|
}
|
|
|
|
void _startOrStopCursorTimerIfNeeded() {
|
|
if (this._cursorTimer == null && this._hasFocus && this._value.selection.isCollapsed) {
|
|
this._startCursorTimer();
|
|
}
|
|
else if (this._cursorTimer != null && (!this._hasFocus || !this._value.selection.isCollapsed)) {
|
|
this._stopCursorTimer();
|
|
}
|
|
}
|
|
|
|
|
|
void _didChangeTextEditingValue() {
|
|
this._updateRemoteEditingValueIfNeeded();
|
|
this._updateImePosIfNeed();
|
|
this._startOrStopCursorTimerIfNeeded();
|
|
this._updateOrDisposeSelectionOverlayIfNeeded();
|
|
this._textChangedSinceLastCaretUpdate = true;
|
|
this.setState(() => { });
|
|
}
|
|
|
|
void _handleFocusChanged() {
|
|
this._openOrCloseInputConnectionIfNeeded();
|
|
this._startOrStopCursorTimerIfNeeded();
|
|
this._updateOrDisposeSelectionOverlayIfNeeded();
|
|
if (this._hasFocus) {
|
|
WidgetsBinding.instance.addObserver(this);
|
|
this._lastBottomViewInset = Window.instance.viewInsets.bottom;
|
|
this._showCaretOnScreen();
|
|
if (!this._value.selection.isValid) {
|
|
this.widget.controller.selection = TextSelection.collapsed(offset: this._value.text.Length);
|
|
}
|
|
}
|
|
else {
|
|
WidgetsBinding.instance.removeObserver(this);
|
|
this._value = new TextEditingValue(text: this._value.text);
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
float _devicePixelRatio {
|
|
get { return MediaQuery.of(this.context).devicePixelRatio; }
|
|
}
|
|
|
|
public void bringIntoView(TextPosition position) {
|
|
this._scrollController.jumpTo(
|
|
this._getScrollOffsetForCaret(this.renderEditable.getLocalRectForCaret(position)));
|
|
}
|
|
|
|
public bool showToolbar() {
|
|
if (this._selectionOverlay == null) {
|
|
return false;
|
|
}
|
|
|
|
this._selectionOverlay.showToolbar();
|
|
return true;
|
|
}
|
|
|
|
public void hideToolbar() {
|
|
this._selectionOverlay?.hide();
|
|
}
|
|
|
|
public override Widget build(BuildContext context) {
|
|
D.assert(WidgetsD.debugCheckHasMediaQuery(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: this.widget.scrollPhysics,
|
|
dragStartBehavior: this.widget.dragStartBehavior,
|
|
viewportBuilder: (BuildContext _context, ViewportOffset offset) =>
|
|
new CompositedTransformTarget(
|
|
link: this._layerLink,
|
|
child: new _Editable(
|
|
key: this._editableKey,
|
|
textSpan: this.buildTextSpan(),
|
|
value: this._value,
|
|
cursorColor: this._cursorColor,
|
|
backgroundCursorColor: this.widget.backgroundCursorColor,
|
|
showCursor: EditableText.debugDeterministicCursor
|
|
? new ValueNotifier<bool>(true)
|
|
: this._cursorVisibilityNotifier,
|
|
hasFocus: this._hasFocus,
|
|
maxLines: this.widget.maxLines,
|
|
minLines: this.widget.minLines,
|
|
expands: this.widget.expands,
|
|
strutStyle: this.widget.strutStyle,
|
|
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,
|
|
cursorWidth: this.widget.cursorWidth,
|
|
cursorRadius: this.widget.cursorRadius,
|
|
cursorOffset: this.widget.cursorOffset,
|
|
paintCursorAboveText: this.widget.paintCursorAboveText,
|
|
enableInteractiveSelection: this.widget.enableInteractiveSelection == true,
|
|
textSelectionDelegate: this,
|
|
devicePixelRatio: this._devicePixelRatio,
|
|
globalKeyEventHandler : this.widget.globalKeyEventHandler
|
|
)
|
|
)
|
|
);
|
|
}
|
|
|
|
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 (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);
|
|
}
|
|
|
|
// unity keyboard has a preview view with editing function, text selection & cursor function of this widget is disable
|
|
// in the case
|
|
bool _unityKeyboard() {
|
|
return TouchScreenKeyboard.isSupported && this.widget.unityTouchKeyboard;
|
|
}
|
|
|
|
Offset _getImePos() {
|
|
if (this._hasInputConnection && this._textInputConnection.imeRequired()) {
|
|
var localPos = this.renderEditable.getLocalRectForCaret(this._value.selection.basePos).bottomLeft;
|
|
return this.renderEditable.localToGlobal(localPos);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
bool _imePosUpdateScheduled = false;
|
|
|
|
void _updateImePosIfNeed() {
|
|
if (!this._hasInputConnection || !this._textInputConnection.imeRequired()) {
|
|
return;
|
|
}
|
|
|
|
if (this._imePosUpdateScheduled) {
|
|
return;
|
|
}
|
|
|
|
this._imePosUpdateScheduled = true;
|
|
SchedulerBinding.instance.addPostFrameCallback(_ => {
|
|
this._imePosUpdateScheduled = false;
|
|
if (!this._hasInputConnection) {
|
|
return;
|
|
}
|
|
|
|
this._textInputConnection.setIMEPos(this._getImePos());
|
|
});
|
|
}
|
|
}
|
|
|
|
class _Editable : LeafRenderObjectWidget {
|
|
public readonly TextSpan textSpan;
|
|
public readonly TextEditingValue value;
|
|
public readonly Color cursorColor;
|
|
public readonly Color backgroundCursorColor;
|
|
public readonly ValueNotifier<bool> showCursor;
|
|
public readonly bool hasFocus;
|
|
public readonly int? maxLines;
|
|
public readonly int? minLines;
|
|
public readonly bool expands;
|
|
public readonly StrutStyle strutStyle;
|
|
public readonly Color selectionColor;
|
|
public readonly float 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 readonly float? cursorWidth;
|
|
public readonly Radius cursorRadius;
|
|
public readonly Offset cursorOffset;
|
|
public readonly bool enableInteractiveSelection;
|
|
public readonly TextSelectionDelegate textSelectionDelegate;
|
|
public readonly bool? paintCursorAboveText;
|
|
public readonly float? devicePixelRatio;
|
|
public readonly GlobalKeyEventHandlerDelegate globalKeyEventHandler;
|
|
|
|
public _Editable(TextSpan textSpan = null,
|
|
TextEditingValue value = null,
|
|
Color cursorColor = null,
|
|
Color backgroundCursorColor = null,
|
|
ValueNotifier<bool> showCursor = null,
|
|
bool hasFocus = false,
|
|
int? maxLines = null,
|
|
int? minLines = null,
|
|
bool expands = false,
|
|
StrutStyle strutStyle = null,
|
|
Color selectionColor = null,
|
|
float textScaleFactor = 1.0f,
|
|
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,
|
|
TextSelectionDelegate textSelectionDelegate = null,
|
|
float? cursorWidth = null,
|
|
Radius cursorRadius = null,
|
|
Offset cursorOffset = null,
|
|
bool enableInteractiveSelection = true,
|
|
bool? paintCursorAboveText = null,
|
|
float? devicePixelRatio = null,
|
|
GlobalKeyEventHandlerDelegate globalKeyEventHandler = null) : base(key) {
|
|
this.textSpan = textSpan;
|
|
this.value = value;
|
|
this.cursorColor = cursorColor;
|
|
this.backgroundCursorColor = backgroundCursorColor;
|
|
this.showCursor = showCursor;
|
|
this.hasFocus = hasFocus;
|
|
this.maxLines = maxLines;
|
|
this.minLines = minLines;
|
|
this.expands = expands;
|
|
this.strutStyle = strutStyle;
|
|
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;
|
|
this.textSelectionDelegate = textSelectionDelegate;
|
|
this.cursorWidth = cursorWidth;
|
|
this.cursorRadius = cursorRadius;
|
|
this.cursorOffset = cursorOffset;
|
|
this.enableInteractiveSelection = enableInteractiveSelection;
|
|
this.paintCursorAboveText = paintCursorAboveText;
|
|
this.devicePixelRatio = devicePixelRatio;
|
|
this.globalKeyEventHandler = globalKeyEventHandler;
|
|
}
|
|
|
|
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,
|
|
backgroundCursorColor: this.backgroundCursorColor,
|
|
hasFocus: this.hasFocus,
|
|
maxLines: this.maxLines,
|
|
minLines: this.minLines,
|
|
expands: this.expands,
|
|
strutStyle: this.strutStyle,
|
|
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,
|
|
cursorWidth: this.cursorWidth ?? 1.0f,
|
|
cursorRadius: this.cursorRadius,
|
|
cursorOffset: this.cursorOffset,
|
|
enableInteractiveSelection: this.enableInteractiveSelection,
|
|
textSelectionDelegate: this.textSelectionDelegate,
|
|
paintCursorAboveText: this.paintCursorAboveText == true,
|
|
devicePixelRatio: this.devicePixelRatio ?? 1.0f,
|
|
globalKeyEventHandler : this.globalKeyEventHandler
|
|
);
|
|
}
|
|
|
|
public override void updateRenderObject(BuildContext context, RenderObject renderObject) {
|
|
var edit = (RenderEditable) renderObject;
|
|
edit.text = this.textSpan;
|
|
edit.cursorColor = this.cursorColor;
|
|
edit.backgroundCursorColor = this.backgroundCursorColor;
|
|
edit.showCursor = this.showCursor;
|
|
edit.hasFocus = this.hasFocus;
|
|
edit.maxLines = this.maxLines;
|
|
edit.strutStyle = this.strutStyle;
|
|
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;
|
|
edit.textSelectionDelegate = this.textSelectionDelegate;
|
|
edit.cursorWidth = this.cursorWidth ?? 1.0f;
|
|
edit.cursorRadius = this.cursorRadius;
|
|
edit.cursorOffset = this.cursorOffset;
|
|
edit.enableInteractiveSelection = this.enableInteractiveSelection;
|
|
edit.paintCursorAboveText = this.paintCursorAboveText == true;
|
|
edit.devicePixelRatio = this.devicePixelRatio ?? 1.0f;
|
|
edit.globalKeyEventHandler = this.globalKeyEventHandler;
|
|
}
|
|
}
|
|
}
|