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1187 行
48 KiB
1187 行
48 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.async2;
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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 Brightness = Unity.UIWidgets.ui.Brightness;
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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 StrutStyle = Unity.UIWidgets.painting.StrutStyle;
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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 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 value.selection; }
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set {
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if (value.start > text.Length || value.end > 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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value = TextEditingValue.empty;
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}
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public void clearComposing() {
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value = 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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_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 (_strutStyle == null) {
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return style != null
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? StrutStyle.fromTextStyle(style, forceStrutHeight: true)
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: StrutStyle.disabled;
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}
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return _strutStyle.inheritFromTextStyle(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 enableInteractiveSelection ?? !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", controller));
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properties.add(new DiagnosticsProperty<FocusNode>("focusNode", focusNode));
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properties.add(new DiagnosticsProperty<bool>("obscureText", obscureText, defaultValue: false));
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properties.add(new DiagnosticsProperty<bool>("autocorrect", autocorrect, defaultValue: true));
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if (style != null) {
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style.debugFillProperties(properties);
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}
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properties.add(new EnumProperty<TextAlign>("textAlign", textAlign,
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defaultValue: foundation_.kNullDefaultValue));
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properties.add(new EnumProperty<TextDirection?>("textDirection", textDirection,
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defaultValue: foundation_.kNullDefaultValue));
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properties.add(new DiagnosticsProperty<float?>("textScaleFactor", textScaleFactor,
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defaultValue: foundation_.kNullDefaultValue));
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properties.add(new DiagnosticsProperty<int?>("maxLines", maxLines, defaultValue: 1));
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properties.add(new DiagnosticsProperty<int?>("minLines", minLines,
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defaultValue: foundation_.kNullDefaultValue));
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properties.add(new DiagnosticsProperty<bool>("expands", expands, defaultValue: false));
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properties.add(new DiagnosticsProperty<bool>("autofocus", autofocus, defaultValue: false));
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properties.add(
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new DiagnosticsProperty<TextInputType>("keyboardType", keyboardType, defaultValue: null));
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properties.add(new DiagnosticsProperty<ScrollPhysics>("scrollPhysics", scrollPhysics,
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defaultValue: foundation_.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 widget.focusNode.hasFocus; }
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}
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Color _cursorColor {
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get { return widget.cursorColor.withOpacity(_cursorBlinkOpacityController.value); }
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}
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public override void initState() {
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base.initState();
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widget.controller.addListener(_didChangeTextEditingValue);
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widget.focusNode.addListener(_handleFocusChanged);
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_scrollController.addListener(() => { _selectionOverlay?.updateForScroll(); });
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_cursorBlinkOpacityController = new AnimationController(vsync: this, duration: _fadeDuration);
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_cursorBlinkOpacityController.addListener(_onCursorColorTick);
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_floatingCursorResetController = new AnimationController(vsync: this);
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_floatingCursorResetController.addListener(_onFloatingCursorResetTick);
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}
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public override void didChangeDependencies() {
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base.didChangeDependencies();
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if (!_didAutoFocus && widget.autofocus) {
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FocusScope.of(context).autofocus(widget.focusNode);
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_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 (widget.controller != oldWidget.controller) {
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oldWidget.controller.removeListener(_didChangeTextEditingValue);
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widget.controller.addListener(_didChangeTextEditingValue);
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_updateRemoteEditingValueIfNeeded();
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_updateImePosIfNeed();
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}
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if (widget.focusNode != oldWidget.focusNode) {
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oldWidget.focusNode.removeListener(_handleFocusChanged);
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widget.focusNode.addListener(_handleFocusChanged);
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updateKeepAlive();
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}
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}
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public override void dispose() {
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widget.controller.removeListener(_didChangeTextEditingValue);
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_cursorBlinkOpacityController.removeListener(_onCursorColorTick);
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_floatingCursorResetController.removeListener(_onFloatingCursorResetTick);
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_closeInputConnectionIfNeeded();
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D.assert(!_hasInputConnection);
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_stopCursorTimer();
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D.assert(_cursorTimer == null);
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_selectionOverlay?.dispose();
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_selectionOverlay = null;
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widget.focusNode.removeListener(_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 != _value.text) {
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_hideSelectionOverlayIfNeeded();
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_showCaretOnScreen();
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if (widget.obscureText && value.text.Length == _value.text.Length + 1) {
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_obscureShowCharTicksPending = !_unityKeyboard() ? _kObscureShowLatestCharCursorTicks : 0;
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_obscureLatestCharIndex = _value.selection.baseOffset;
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}
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}
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_lastKnownRemoteTextEditingValue = value;
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_formatAndSetValue(value, isIMEInput);
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_stopCursorTimer(resetCharTicks: false);
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_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 (!_isMultiline) {
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_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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_finalizeEditing(true);
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break;
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default:
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_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, 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 (_floatingCursorResetController.isAnimating) {
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_floatingCursorResetController.stop();
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_onFloatingCursorResetTick();
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}
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TextPosition currentTextPosition =
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new TextPosition(offset: renderEditable.selection.baseOffset);
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_startCaretRect = renderEditable.getLocalRectForCaret(currentTextPosition);
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renderEditable.setFloatingCursor(point.state,
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_startCaretRect.center - _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 (_pointOffsetOrigin != null) {
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Offset centeredPoint = point.offset - _pointOffsetOrigin;
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Offset rawCursorOffset =
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_startCaretRect.center + centeredPoint - _floatingCursorOffset;
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_lastBoundedOffset =
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renderEditable.calculateBoundedFloatingCursorOffset(rawCursorOffset);
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_lastTextPosition = renderEditable.getPositionForPoint(
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renderEditable.localToGlobal(_lastBoundedOffset + _floatingCursorOffset));
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renderEditable.setFloatingCursor(point.state, _lastBoundedOffset,
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_lastTextPosition);
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}
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else {
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_pointOffsetOrigin = point.offset;
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}
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break;
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case FloatingCursorDragState.End:
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_floatingCursorResetController.setValue(0.0f);
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_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 widget.globalKeyEventHandler?.Invoke(evt, true) ?? RawInputKeyResponse.convert(evt);
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}
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void _onFloatingCursorResetTick() {
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Offset finalPosition = renderEditable.getLocalRectForCaret(_lastTextPosition).centerLeft -
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_floatingCursorOffset;
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if (_floatingCursorResetController.isCompleted) {
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renderEditable.setFloatingCursor(FloatingCursorDragState.End, finalPosition,
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_lastTextPosition);
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if (_lastTextPosition.offset != renderEditable.selection.baseOffset) {
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_handleSelectionChanged(TextSelection.collapsed(offset: _lastTextPosition.offset),
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renderEditable, SelectionChangedCause.forcePress);
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}
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_startCaretRect = null;
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_lastTextPosition = null;
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_pointOffsetOrigin = null;
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_lastBoundedOffset = null;
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}
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else {
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float lerpValue = _floatingCursorResetController.value;
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float lerpX = MathUtils.lerpFloat(_lastBoundedOffset.dx, finalPosition.dx, lerpValue);
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float lerpY = MathUtils.lerpFloat(_lastBoundedOffset.dy, finalPosition.dy, lerpValue);
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renderEditable.setFloatingCursor(FloatingCursorDragState.Update, new Offset(lerpX, lerpY),
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_lastTextPosition, resetLerpValue: lerpValue);
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}
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}
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void _finalizeEditing(bool shouldUnfocus) {
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if (widget.onEditingComplete != null) {
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widget.onEditingComplete();
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}
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else {
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widget.controller.clearComposing();
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if (shouldUnfocus) {
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widget.focusNode.unfocus();
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}
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}
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if (widget.onSubmitted != null) {
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widget.onSubmitted(_value.text);
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}
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}
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void _updateRemoteEditingValueIfNeeded() {
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if (!_hasInputConnection) {
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return;
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}
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var localValue = _value;
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if (localValue == _lastKnownRemoteTextEditingValue) {
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return;
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}
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_lastKnownRemoteTextEditingValue = localValue;
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_textInputConnection.setEditingState(localValue);
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}
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TextEditingValue _value {
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get { return widget.controller.value; }
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set { widget.controller.value = value; }
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}
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bool _hasFocus {
|
|
get { return widget.focusNode.hasFocus; }
|
|
}
|
|
|
|
bool _isMultiline {
|
|
get { return widget.maxLines != 1; }
|
|
}
|
|
|
|
// Calculate the new scroll offset so the cursor remains visible.
|
|
float _getScrollOffsetForCaret(Rect caretRect) {
|
|
float caretStart;
|
|
float caretEnd;
|
|
if (_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 = 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 = _scrollController.offset;
|
|
float viewportExtent = _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 = _scrollController.offset - scrollOffset;
|
|
return _isMultiline ? caretRect.translate(0.0f, offsetDiff) : caretRect.translate(offsetDiff, 0.0f);
|
|
}
|
|
|
|
bool _hasInputConnection {
|
|
get { return _textInputConnection != null && _textInputConnection.attached; }
|
|
}
|
|
|
|
void _openInputConnection() {
|
|
if (!_hasInputConnection) {
|
|
TextEditingValue localValue = _value;
|
|
_lastKnownRemoteTextEditingValue = localValue;
|
|
_textInputConnection = TextInput.attach(this, new TextInputConfiguration(
|
|
inputType: widget.keyboardType,
|
|
obscureText: widget.obscureText,
|
|
autocorrect: widget.autocorrect,
|
|
inputAction: widget.textInputAction ?? ((widget.keyboardType == TextInputType.multiline)
|
|
? TextInputAction.newline
|
|
: TextInputAction.done),
|
|
textCapitalization: widget.textCapitalization,
|
|
keyboardAppearance: widget.keyboardAppearance ?? Brightness.light,
|
|
unityTouchKeyboard: widget.unityTouchKeyboard
|
|
));
|
|
_textInputConnection.setEditingState(localValue);
|
|
_updateImePosIfNeed();
|
|
}
|
|
|
|
_textInputConnection.show();
|
|
}
|
|
|
|
void _closeInputConnectionIfNeeded() {
|
|
if (_hasInputConnection) {
|
|
_textInputConnection.close();
|
|
_textInputConnection = null;
|
|
_lastKnownRemoteTextEditingValue = null;
|
|
}
|
|
}
|
|
|
|
void _openOrCloseInputConnectionIfNeeded() {
|
|
if (_hasFocus && widget.focusNode.consumeKeyboardToken()) {
|
|
_openInputConnection();
|
|
}
|
|
else if (!_hasFocus) {
|
|
_closeInputConnectionIfNeeded();
|
|
widget.controller.clearComposing();
|
|
}
|
|
}
|
|
|
|
public void requestKeyboard() {
|
|
if (_hasFocus) {
|
|
_openInputConnection();
|
|
}
|
|
else {
|
|
List<FocusScopeNode> ancestorScopes = FocusScope.ancestorsOf(context);
|
|
for (int i = ancestorScopes.Count - 1; i >= 1; i -= 1) {
|
|
ancestorScopes[i].setFirstFocus(ancestorScopes[i - 1]);
|
|
}
|
|
|
|
FocusScope.of(context).requestFocus(widget.focusNode);
|
|
}
|
|
}
|
|
|
|
void _hideSelectionOverlayIfNeeded() {
|
|
_selectionOverlay?.hide();
|
|
_selectionOverlay = null;
|
|
}
|
|
|
|
void _updateOrDisposeSelectionOverlayIfNeeded() {
|
|
if (_selectionOverlay != null) {
|
|
if (_hasFocus) {
|
|
_selectionOverlay.update(_value);
|
|
}
|
|
else {
|
|
_selectionOverlay.dispose();
|
|
_selectionOverlay = null;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void _handleSelectionChanged(TextSelection selection, RenderEditable renderObject,
|
|
SelectionChangedCause cause) {
|
|
widget.controller.selection = selection;
|
|
requestKeyboard();
|
|
|
|
_hideSelectionOverlayIfNeeded();
|
|
|
|
if (widget.selectionControls != null && Application.isMobilePlatform && !_unityKeyboard()) {
|
|
_selectionOverlay = new TextSelectionOverlay(
|
|
context: context,
|
|
value: _value,
|
|
debugRequiredFor: widget,
|
|
layerLink: _layerLink,
|
|
renderObject: renderObject,
|
|
selectionControls: widget.selectionControls,
|
|
selectionDelegate: this,
|
|
dragStartBehavior: widget.dragStartBehavior
|
|
);
|
|
bool longPress = cause == SelectionChangedCause.longPress;
|
|
if (cause != SelectionChangedCause.keyboard && (_value.text.isNotEmpty() || longPress)) {
|
|
_selectionOverlay.showHandles();
|
|
}
|
|
|
|
if (longPress || cause == SelectionChangedCause.doubleTap) {
|
|
_selectionOverlay.showToolbar();
|
|
}
|
|
}
|
|
|
|
if (widget.onSelectionChanged != null) {
|
|
widget.onSelectionChanged(selection, cause);
|
|
}
|
|
}
|
|
|
|
bool _textChangedSinceLastCaretUpdate = false;
|
|
Rect _currentCaretRect;
|
|
|
|
void _handleCaretChanged(Rect caretRect) {
|
|
_currentCaretRect = caretRect;
|
|
// If the caret location has changed due to an update to the text or
|
|
// selection, then scroll the caret into view.
|
|
if (_textChangedSinceLastCaretUpdate) {
|
|
_textChangedSinceLastCaretUpdate = false;
|
|
_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 (_showCaretOnScreenScheduled) {
|
|
return;
|
|
}
|
|
|
|
_showCaretOnScreenScheduled = true;
|
|
SchedulerBinding.instance.addPostFrameCallback(_ => {
|
|
_showCaretOnScreenScheduled = false;
|
|
if (_currentCaretRect == null || !_scrollController.hasClients) {
|
|
return;
|
|
}
|
|
|
|
float scrollOffsetForCaret = _getScrollOffsetForCaret(_currentCaretRect);
|
|
_scrollController.animateTo(scrollOffsetForCaret,
|
|
duration: _caretAnimationDuration,
|
|
curve: _caretAnimationCurve);
|
|
|
|
Rect newCaretRect = _getCaretRectAtScrollOffset(_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 - widget.scrollPadding.left,
|
|
newCaretRect.top - widget.scrollPadding.top,
|
|
newCaretRect.right + widget.scrollPadding.right,
|
|
newCaretRect.bottom + widget.scrollPadding.bottom
|
|
);
|
|
_editableKey.currentContext.findRenderObject().showOnScreen(
|
|
rect: inflatedRect,
|
|
duration: _caretAnimationDuration,
|
|
curve: _caretAnimationCurve
|
|
);
|
|
});
|
|
}
|
|
|
|
|
|
double _lastBottomViewInset;
|
|
|
|
public void didChangeMetrics() {
|
|
if (_lastBottomViewInset < Window.instance.viewInsets.bottom) {
|
|
_showCaretOnScreen();
|
|
}
|
|
|
|
_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 = _value?.text != value?.text || isIMEInput;
|
|
if (textChanged && widget.inputFormatters != null && widget.inputFormatters.isNotEmpty()) {
|
|
foreach (var formatter in widget.inputFormatters) {
|
|
value = formatter.formatEditUpdate(_value, value);
|
|
}
|
|
|
|
_value = value;
|
|
_updateRemoteEditingValueIfNeeded();
|
|
_updateImePosIfNeed();
|
|
}
|
|
else {
|
|
_value = value;
|
|
}
|
|
|
|
if (textChanged && widget.onChanged != null) {
|
|
widget.onChanged(value.text);
|
|
}
|
|
}
|
|
|
|
void _onCursorColorTick() {
|
|
renderEditable.cursorColor =
|
|
widget.cursorColor.withOpacity(_cursorBlinkOpacityController.value);
|
|
_cursorVisibilityNotifier.value = _cursorBlinkOpacityController.value > 0;
|
|
}
|
|
|
|
public bool cursorCurrentlyVisible {
|
|
get { return _cursorBlinkOpacityController.value > 0; }
|
|
}
|
|
|
|
public TimeSpan cursorBlinkInterval {
|
|
get { return _kCursorBlinkHalfPeriod; }
|
|
}
|
|
|
|
public TextSelectionOverlay selectionOverlay {
|
|
get { return _selectionOverlay; }
|
|
}
|
|
|
|
int _obscureShowCharTicksPending = 0;
|
|
int _obscureLatestCharIndex;
|
|
|
|
object _cursorTick(object timer) {
|
|
_targetCursorVisibility = !_unityKeyboard() && !_targetCursorVisibility;
|
|
float targetOpacity = _targetCursorVisibility ? 1.0f : 0.0f;
|
|
if (widget.cursorOpacityAnimates) {
|
|
_cursorBlinkOpacityController.animateTo(targetOpacity, curve: Curves.easeOut);
|
|
}
|
|
else {
|
|
_cursorBlinkOpacityController.setValue(targetOpacity);
|
|
}
|
|
|
|
if (_obscureShowCharTicksPending > 0) {
|
|
setState(() => { _obscureShowCharTicksPending--; });
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
object _cursorWaitForStart(object timer) {
|
|
D.assert(_kCursorBlinkHalfPeriod > _fadeDuration);
|
|
_cursorTimer?.cancel();
|
|
_cursorTimer = Timer.periodic(_kCursorBlinkHalfPeriod, _cursorTick);
|
|
return null;
|
|
}
|
|
|
|
void _startCursorTimer() {
|
|
_targetCursorVisibility = true;
|
|
_cursorBlinkOpacityController.setValue(1.0f);
|
|
if (EditableText.debugDeterministicCursor) {
|
|
return;
|
|
}
|
|
|
|
if (widget.cursorOpacityAnimates) {
|
|
_cursorTimer =
|
|
Timer.periodic(_kCursorBlinkWaitForStart, _cursorWaitForStart);
|
|
}
|
|
else {
|
|
_cursorTimer = Timer.periodic(_kCursorBlinkHalfPeriod, _cursorTick);
|
|
}
|
|
}
|
|
|
|
void _stopCursorTimer(bool resetCharTicks = true) {
|
|
_cursorTimer?.cancel();
|
|
_cursorTimer = null;
|
|
_targetCursorVisibility = false;
|
|
_cursorBlinkOpacityController.setValue(0.0f);
|
|
if (EditableText.debugDeterministicCursor) {
|
|
return;
|
|
}
|
|
|
|
if (resetCharTicks) {
|
|
_obscureShowCharTicksPending = 0;
|
|
}
|
|
|
|
if (widget.cursorOpacityAnimates) {
|
|
_cursorBlinkOpacityController.stop();
|
|
_cursorBlinkOpacityController.setValue(0.0f);
|
|
}
|
|
}
|
|
|
|
void _startOrStopCursorTimerIfNeeded() {
|
|
if (_cursorTimer == null && _hasFocus && _value.selection.isCollapsed) {
|
|
_startCursorTimer();
|
|
}
|
|
else if (_cursorTimer != null && (!_hasFocus || !_value.selection.isCollapsed)) {
|
|
_stopCursorTimer();
|
|
}
|
|
}
|
|
|
|
|
|
void _didChangeTextEditingValue() {
|
|
_updateRemoteEditingValueIfNeeded();
|
|
_updateImePosIfNeed();
|
|
_startOrStopCursorTimerIfNeeded();
|
|
_updateOrDisposeSelectionOverlayIfNeeded();
|
|
_textChangedSinceLastCaretUpdate = true;
|
|
setState(() => { });
|
|
}
|
|
|
|
void _handleFocusChanged() {
|
|
_openOrCloseInputConnectionIfNeeded();
|
|
_startOrStopCursorTimerIfNeeded();
|
|
_updateOrDisposeSelectionOverlayIfNeeded();
|
|
if (_hasFocus) {
|
|
WidgetsBinding.instance.addObserver(this);
|
|
_lastBottomViewInset = Window.instance.viewInsets.bottom;
|
|
_showCaretOnScreen();
|
|
if (!_value.selection.isValid) {
|
|
widget.controller.selection = TextSelection.collapsed(offset: _value.text.Length);
|
|
}
|
|
}
|
|
else {
|
|
WidgetsBinding.instance.removeObserver(this);
|
|
_value = new TextEditingValue(text: _value.text);
|
|
}
|
|
|
|
updateKeepAlive();
|
|
}
|
|
|
|
|
|
TextDirection? _textDirection {
|
|
get {
|
|
TextDirection? result = widget.textDirection ?? Directionality.of(context);
|
|
D.assert(result != null,
|
|
() =>
|
|
$"{GetType().FullName} created without a textDirection and with no ambient Directionality.");
|
|
return result;
|
|
}
|
|
}
|
|
|
|
public RenderEditable renderEditable {
|
|
get { return (RenderEditable) _editableKey.currentContext.findRenderObject(); }
|
|
}
|
|
|
|
public TextEditingValue textEditingValue {
|
|
get { return _value; }
|
|
set {
|
|
_selectionOverlay?.update(value);
|
|
_formatAndSetValue(value);
|
|
}
|
|
}
|
|
|
|
float _devicePixelRatio {
|
|
get { return MediaQuery.of(context).devicePixelRatio; }
|
|
}
|
|
|
|
public void bringIntoView(TextPosition position) {
|
|
_scrollController.jumpTo(
|
|
_getScrollOffsetForCaret(renderEditable.getLocalRectForCaret(position)));
|
|
}
|
|
|
|
public bool showToolbar() {
|
|
if (_selectionOverlay == null) {
|
|
return false;
|
|
}
|
|
|
|
_selectionOverlay.showToolbar();
|
|
return true;
|
|
}
|
|
|
|
public void hideToolbar() {
|
|
_selectionOverlay?.hide();
|
|
}
|
|
|
|
public override Widget build(BuildContext context) {
|
|
D.assert(WidgetsD.debugCheckHasMediaQuery(context));
|
|
FocusScope.of(context).reparentIfNeeded(widget.focusNode);
|
|
base.build(context); // See AutomaticKeepAliveClientMixin.
|
|
|
|
return new Scrollable(
|
|
axisDirection: _isMultiline ? AxisDirection.down : AxisDirection.right,
|
|
controller: _scrollController,
|
|
physics: widget.scrollPhysics,
|
|
dragStartBehavior: widget.dragStartBehavior,
|
|
viewportBuilder: (BuildContext _context, ViewportOffset offset) =>
|
|
new CompositedTransformTarget(
|
|
link: _layerLink,
|
|
child: new _Editable(
|
|
key: _editableKey,
|
|
textSpan: buildTextSpan(),
|
|
value: _value,
|
|
cursorColor: _cursorColor,
|
|
backgroundCursorColor: widget.backgroundCursorColor,
|
|
showCursor: EditableText.debugDeterministicCursor
|
|
? new ValueNotifier<bool>(true)
|
|
: _cursorVisibilityNotifier,
|
|
hasFocus: _hasFocus,
|
|
maxLines: widget.maxLines,
|
|
minLines: widget.minLines,
|
|
expands: widget.expands,
|
|
strutStyle: widget.strutStyle,
|
|
selectionColor: widget.selectionColor,
|
|
textScaleFactor: widget.textScaleFactor ?? MediaQuery.textScaleFactorOf(context),
|
|
textAlign: widget.textAlign,
|
|
textDirection: _textDirection,
|
|
obscureText: widget.obscureText,
|
|
autocorrect: widget.autocorrect,
|
|
offset: offset,
|
|
onSelectionChanged: _handleSelectionChanged,
|
|
onCaretChanged: _handleCaretChanged,
|
|
rendererIgnoresPointer: widget.rendererIgnoresPointer,
|
|
cursorWidth: widget.cursorWidth,
|
|
cursorRadius: widget.cursorRadius,
|
|
cursorOffset: widget.cursorOffset,
|
|
paintCursorAboveText: widget.paintCursorAboveText,
|
|
enableInteractiveSelection: widget.enableInteractiveSelection == true,
|
|
textSelectionDelegate: this,
|
|
devicePixelRatio: _devicePixelRatio,
|
|
globalKeyEventHandler : widget.globalKeyEventHandler
|
|
)
|
|
)
|
|
);
|
|
}
|
|
|
|
public TextSpan buildTextSpan() {
|
|
if (!widget.obscureText && _value.composing.isValid) {
|
|
TextStyle composingStyle = widget.style.merge(
|
|
new TextStyle(decoration: TextDecoration.underline)
|
|
);
|
|
|
|
return new TextSpan(
|
|
style: widget.style,
|
|
children: new List<TextSpan> {
|
|
new TextSpan(text: _value.composing.textBefore(_value.text)),
|
|
new TextSpan(
|
|
style: composingStyle,
|
|
text: _value.composing.textInside(_value.text)
|
|
),
|
|
new TextSpan(text: _value.composing.textAfter(_value.text)),
|
|
});
|
|
}
|
|
|
|
var text = _value.text;
|
|
if (widget.obscureText) {
|
|
text = new string(RenderEditable.obscuringCharacter, text.Length);
|
|
int o = _obscureShowCharTicksPending > 0 ? _obscureLatestCharIndex : -1;
|
|
if (o >= 0 && o < text.Length) {
|
|
text = text.Substring(0, o) + _value.text.Substring(o, 1) + text.Substring(o + 1);
|
|
}
|
|
}
|
|
|
|
return new TextSpan(style: 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 && widget.unityTouchKeyboard;
|
|
}
|
|
|
|
Offset _getImePos() {
|
|
if (_hasInputConnection && _textInputConnection.imeRequired()) {
|
|
var localPos = renderEditable.getLocalRectForCaret(_value.selection.basePos).bottomLeft;
|
|
return renderEditable.localToGlobal(localPos);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
bool _imePosUpdateScheduled = false;
|
|
|
|
void _updateImePosIfNeed() {
|
|
if (!_hasInputConnection || !_textInputConnection.imeRequired()) {
|
|
return;
|
|
}
|
|
|
|
if (_imePosUpdateScheduled) {
|
|
return;
|
|
}
|
|
|
|
_imePosUpdateScheduled = true;
|
|
SchedulerBinding.instance.addPostFrameCallback(_ => {
|
|
_imePosUpdateScheduled = false;
|
|
if (!_hasInputConnection) {
|
|
return;
|
|
}
|
|
|
|
_textInputConnection.setIMEPos(_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;
|
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public readonly bool obscureText;
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public readonly bool autocorrect;
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public readonly ViewportOffset offset;
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public readonly SelectionChangedHandler onSelectionChanged;
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public readonly CaretChangedHandler onCaretChanged;
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public readonly bool rendererIgnoresPointer;
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public readonly float? cursorWidth;
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public readonly Radius cursorRadius;
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public readonly Offset cursorOffset;
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public readonly bool enableInteractiveSelection;
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public readonly TextSelectionDelegate textSelectionDelegate;
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public readonly bool? paintCursorAboveText;
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public readonly float? devicePixelRatio;
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public readonly GlobalKeyEventHandlerDelegate globalKeyEventHandler;
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public _Editable(TextSpan textSpan = null,
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TextEditingValue value = null,
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Color cursorColor = null,
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Color backgroundCursorColor = null,
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ValueNotifier<bool> showCursor = null,
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bool hasFocus = false,
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int? maxLines = null,
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int? minLines = null,
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bool expands = false,
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StrutStyle strutStyle = null,
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Color selectionColor = null,
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float textScaleFactor = 1.0f,
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TextDirection? textDirection = null,
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bool obscureText = false,
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TextAlign textAlign = TextAlign.left,
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bool autocorrect = false,
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ViewportOffset offset = null,
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SelectionChangedHandler onSelectionChanged = null,
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CaretChangedHandler onCaretChanged = null,
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bool rendererIgnoresPointer = false,
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Key key = null,
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TextSelectionDelegate textSelectionDelegate = null,
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float? cursorWidth = null,
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Radius cursorRadius = null,
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Offset cursorOffset = null,
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bool enableInteractiveSelection = true,
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bool? paintCursorAboveText = null,
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float? devicePixelRatio = null,
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GlobalKeyEventHandlerDelegate globalKeyEventHandler = null) : base(key) {
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this.textSpan = textSpan;
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this.value = value;
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this.cursorColor = cursorColor;
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this.backgroundCursorColor = backgroundCursorColor;
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this.showCursor = showCursor;
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this.hasFocus = hasFocus;
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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.strutStyle = strutStyle;
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this.selectionColor = selectionColor;
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this.textScaleFactor = textScaleFactor;
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this.textAlign = textAlign;
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this.textDirection = textDirection;
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this.obscureText = obscureText;
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this.autocorrect = autocorrect;
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this.offset = offset;
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this.onSelectionChanged = onSelectionChanged;
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this.onCaretChanged = onCaretChanged;
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this.rendererIgnoresPointer = rendererIgnoresPointer;
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this.textSelectionDelegate = textSelectionDelegate;
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this.cursorWidth = cursorWidth;
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this.cursorRadius = cursorRadius;
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this.cursorOffset = cursorOffset;
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this.enableInteractiveSelection = enableInteractiveSelection;
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this.paintCursorAboveText = paintCursorAboveText;
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this.devicePixelRatio = devicePixelRatio;
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this.globalKeyEventHandler = globalKeyEventHandler;
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}
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public override RenderObject createRenderObject(BuildContext context) {
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return new RenderEditable(
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text: textSpan,
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textDirection: textDirection ?? TextDirection.ltr,
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offset: offset,
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showCursor: showCursor,
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cursorColor: cursorColor,
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backgroundCursorColor: backgroundCursorColor,
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hasFocus: hasFocus,
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maxLines: maxLines,
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minLines: minLines,
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expands: expands,
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strutStyle: strutStyle,
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selectionColor: selectionColor,
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textScaleFactor: textScaleFactor,
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textAlign: textAlign,
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selection: value.selection,
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obscureText: obscureText,
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onSelectionChanged: onSelectionChanged,
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onCaretChanged: onCaretChanged,
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ignorePointer: rendererIgnoresPointer,
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cursorWidth: cursorWidth ?? 1.0f,
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cursorRadius: cursorRadius,
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cursorOffset: cursorOffset,
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enableInteractiveSelection: enableInteractiveSelection,
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textSelectionDelegate: textSelectionDelegate,
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paintCursorAboveText: paintCursorAboveText == true,
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devicePixelRatio: devicePixelRatio ?? 1.0f,
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globalKeyEventHandler : globalKeyEventHandler
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);
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}
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public override void updateRenderObject(BuildContext context, RenderObject renderObject) {
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var edit = (RenderEditable) renderObject;
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edit.text = textSpan;
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edit.cursorColor = cursorColor;
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edit.backgroundCursorColor = backgroundCursorColor;
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edit.showCursor = showCursor;
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edit.hasFocus = hasFocus;
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edit.maxLines = maxLines;
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edit.strutStyle = strutStyle;
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edit.selectionColor = selectionColor;
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edit.textScaleFactor = textScaleFactor;
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edit.textAlign = textAlign;
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edit.textDirection = textDirection;
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edit.selection = value.selection;
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edit.offset = offset;
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edit.onSelectionChanged = onSelectionChanged;
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edit.onCaretChanged = onCaretChanged;
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edit.ignorePointer = rendererIgnoresPointer;
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edit.obscureText = obscureText;
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edit.textSelectionDelegate = textSelectionDelegate;
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edit.cursorWidth = cursorWidth ?? 1.0f;
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edit.cursorRadius = cursorRadius;
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edit.cursorOffset = cursorOffset;
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edit.enableInteractiveSelection = enableInteractiveSelection;
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edit.paintCursorAboveText = paintCursorAboveText == true;
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edit.devicePixelRatio = devicePixelRatio ?? 1.0f;
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edit.globalKeyEventHandler = globalKeyEventHandler;
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}
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}
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}
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