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Allow configuring text to be selectable #73

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Allow configuring text to be selectable #73

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22 changes: 19 additions & 3 deletions flutter_highlighting/lib/flutter_highlighting.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -27,13 +27,25 @@ class HighlightView extends StatelessWidget {
/// Specify text styles such as font family and font size
final TextStyle? textStyle;

/// Text selectable
///
/// Specify if the text is selectable
final bool selectable;

/// Text selection color
///
/// Specify the text selection highlight color
final Color selectionColor;

HighlightView(
String input, {
this.languageId,
this.theme = const {},
this.padding,
this.textStyle,
int tabSize = 8, // TODO: https://github.com/flutter/flutter/issues/50087
this.selectable = false,
this.selectionColor = _defaultTextSelectionColor,
}) : source = input.replaceAll('\t', ' ' * tabSize);

List<TextSpan> _convert(List<Node> nodes) {
Expand Down Expand Up @@ -71,6 +83,7 @@ class HighlightView extends StatelessWidget {
static const _rootKey = 'root';
static const _defaultFontColor = Color(0xff000000);
static const _defaultBackgroundColor = Color(0xffffffff);
static const _defaultTextSelectionColor = Color(0xAF6694e8);

// TODO: dart:io is not available at web platform currently
// See: https://github.com/flutter/flutter/issues/39998
Expand All @@ -79,20 +92,23 @@ class HighlightView extends StatelessWidget {

@override
Widget build(BuildContext context) {
var _textStyle = TextStyle(
var textStyle = TextStyle(
fontFamily: _defaultFontFamily,
color: theme[_rootKey]?.color ?? _defaultFontColor,
);
if (textStyle != null) {
_textStyle = _textStyle.merge(textStyle);
textStyle = textStyle.merge(textStyle);
}

return Container(
color: theme[_rootKey]?.backgroundColor ?? _defaultBackgroundColor,
padding: padding,
child: RichText(
selectionRegistrar:
selectable ? SelectionContainer.maybeOf(context) : null,
selectionColor: selectionColor,
text: TextSpan(
style: _textStyle,
style: textStyle,
children: _convert(
highlight.highlight(languageId ?? '', source, true).nodes ?? [],
),
Expand Down