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lib/src/extended/cupertino/spell_check_suggestions_toolbar.dart
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| // Copyright 2014 The Flutter Authors. All rights reserved. | ||
| // Use of this source code is governed by a BSD-style license that can be | ||
| // found in the LICENSE file. | ||
|
|
||
| import 'package:extended_text_field/src/extended/widgets/text_field.dart'; | ||
| import 'package:flutter/cupertino.dart'; | ||
| import 'package:flutter/scheduler.dart'; | ||
| import 'package:flutter/services.dart' | ||
| show SelectionChangedCause, SuggestionSpan; | ||
|
|
||
| /// iOS only shows 3 spell check suggestions in the toolbar. | ||
| const int _kMaxSuggestions = 3; | ||
|
|
||
| /// The default spell check suggestions toolbar for iOS. | ||
| /// | ||
| /// Tries to position itself below the [anchors], but if it doesn't fit, then it | ||
| /// readjusts to fit above bottom view insets. | ||
| /// | ||
| /// See also: | ||
| /// * [SpellCheckSuggestionsToolbar], which is similar but for both the | ||
| /// Material and Cupertino libraries. | ||
| /// [CupertinoSpellCheckSuggestionsToolbar] | ||
| class ExtendedCupertinoSpellCheckSuggestionsToolbar extends StatelessWidget { | ||
| /// Constructs a [ExtendedCupertinoSpellCheckSuggestionsToolbar]. | ||
| /// | ||
| /// [buttonItems] must not contain more than three items. | ||
| const ExtendedCupertinoSpellCheckSuggestionsToolbar({ | ||
| super.key, | ||
| required this.anchors, | ||
| required this.buttonItems, | ||
| }) : assert(buttonItems.length <= _kMaxSuggestions); | ||
|
|
||
| /// Constructs a [ExtendedCupertinoSpellCheckSuggestionsToolbar] with the default | ||
| /// children for an [EditableText]. | ||
| /// | ||
| /// See also: | ||
| /// * [SpellCheckSuggestionsToolbar.editableText], which is similar but | ||
| /// builds an Android-style toolbar. | ||
| ExtendedCupertinoSpellCheckSuggestionsToolbar.editableText({ | ||
| super.key, | ||
| // zmtzawqlp | ||
| required ExtendedEditableTextState editableTextState, | ||
| }) : buttonItems = | ||
| buildButtonItems(editableTextState) ?? <ContextMenuButtonItem>[], | ||
| anchors = editableTextState.contextMenuAnchors; | ||
|
|
||
| /// The location on which to anchor the menu. | ||
| final TextSelectionToolbarAnchors anchors; | ||
|
|
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| /// The [ContextMenuButtonItem]s that will be turned into the correct button | ||
| /// widgets and displayed in the spell check suggestions toolbar. | ||
| /// | ||
| /// Must not contain more than three items. | ||
| /// | ||
| /// See also: | ||
| /// | ||
| /// * [AdaptiveTextSelectionToolbar.buttonItems], the list of | ||
| /// [ContextMenuButtonItem]s that are used to build the buttons of the | ||
| /// text selection toolbar. | ||
| /// * [SpellCheckSuggestionsToolbar.buttonItems], the list of | ||
| /// [ContextMenuButtonItem]s used to build the Material style spell check | ||
| /// suggestions toolbar. | ||
| final List<ContextMenuButtonItem> buttonItems; | ||
|
|
||
| /// Builds the button items for the toolbar based on the available | ||
| /// spell check suggestions. | ||
| static List<ContextMenuButtonItem>? buildButtonItems( | ||
| ExtendedEditableTextState editableTextState, | ||
| ) { | ||
| // Determine if composing region is misspelled. | ||
| final SuggestionSpan? spanAtCursorIndex = | ||
| editableTextState.findSuggestionSpanAtCursorIndex( | ||
| editableTextState.currentTextEditingValue.selection.baseOffset, | ||
| ); | ||
|
|
||
| if (spanAtCursorIndex == null) { | ||
| return null; | ||
| } | ||
| if (spanAtCursorIndex.suggestions.isEmpty) { | ||
| assert(debugCheckHasCupertinoLocalizations(editableTextState.context)); | ||
| final CupertinoLocalizations localizations = | ||
| CupertinoLocalizations.of(editableTextState.context); | ||
| return <ContextMenuButtonItem>[ | ||
| ContextMenuButtonItem( | ||
| onPressed: () {}, | ||
| label: localizations.noSpellCheckReplacementsLabel, | ||
| ) | ||
| ]; | ||
| } | ||
|
|
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| final List<ContextMenuButtonItem> buttonItems = <ContextMenuButtonItem>[]; | ||
|
|
||
| // Build suggestion buttons. | ||
| for (final String suggestion | ||
| in spanAtCursorIndex.suggestions.take(_kMaxSuggestions)) { | ||
| buttonItems.add(ContextMenuButtonItem( | ||
| onPressed: () { | ||
| if (!editableTextState.mounted) { | ||
| return; | ||
| } | ||
| _replaceText( | ||
| editableTextState, | ||
| suggestion, | ||
| spanAtCursorIndex.range, | ||
| ); | ||
| }, | ||
| label: suggestion, | ||
| )); | ||
| } | ||
| return buttonItems; | ||
| } | ||
|
|
||
| // zmtzawqlp | ||
| static void _replaceText(ExtendedEditableTextState editableTextState, | ||
| String text, TextRange replacementRange) { | ||
| // Replacement cannot be performed if the text is read only or obscured. | ||
| assert(!editableTextState.widget.readOnly && | ||
| !editableTextState.widget.obscureText); | ||
|
|
||
| final TextEditingValue newValue = editableTextState.textEditingValue | ||
| .replaced( | ||
| replacementRange, | ||
| text, | ||
| ) | ||
| .copyWith( | ||
| selection: TextSelection.collapsed( | ||
| offset: replacementRange.start + text.length, | ||
| ), | ||
| ); | ||
| editableTextState.userUpdateTextEditingValue( | ||
| newValue, SelectionChangedCause.toolbar); | ||
|
|
||
| // Schedule a call to bringIntoView() after renderEditable updates. | ||
| SchedulerBinding.instance.addPostFrameCallback((Duration duration) { | ||
| if (editableTextState.mounted) { | ||
| editableTextState | ||
| .bringIntoView(editableTextState.textEditingValue.selection.extent); | ||
| } | ||
| }); | ||
| editableTextState.hideToolbar(); | ||
| } | ||
|
|
||
| /// Builds the toolbar buttons based on the [buttonItems]. | ||
| List<Widget> _buildToolbarButtons(BuildContext context) { | ||
| return buttonItems.map((ContextMenuButtonItem buttonItem) { | ||
| return CupertinoTextSelectionToolbarButton.buttonItem( | ||
| buttonItem: buttonItem, | ||
| ); | ||
| }).toList(); | ||
| } | ||
|
|
||
| @override | ||
| Widget build(BuildContext context) { | ||
| if (buttonItems.isEmpty) { | ||
| return const SizedBox.shrink(); | ||
| } | ||
|
|
||
| final List<Widget> children = _buildToolbarButtons(context); | ||
| return CupertinoTextSelectionToolbar( | ||
| anchorAbove: anchors.primaryAnchor, | ||
| anchorBelow: anchors.secondaryAnchor == null | ||
| ? anchors.primaryAnchor | ||
| : anchors.secondaryAnchor!, | ||
| children: children, | ||
| ); | ||
| } | ||
| } |
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