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Fix lagging when scrolling #2

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Fix lagging when scrolling #2

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171 changes: 28 additions & 143 deletions lib/src/matrix_linkify.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -6,160 +6,43 @@ import 'package:linkfy_text/src/utils/matrix_regex.dart';

/// Matrix Linkify [text] containing urls, emails or hashtag
class MatrixLinkifyText extends StatelessWidget {
const MatrixLinkifyText(
this.text, {
this.textStyle,
this.linkStyle,
this.linkTypes,
this.onTap,
this.customLinkStyles,
this.strutStyle,
this.textAlign,
this.textDirection,
this.locale,
this.softWrap,
this.overflow,
this.textScaler,
this.maxLines,
this.semanticsLabel,
this.textWidthBasis,
Key? key,
this.onTapDownLink,
this.themeData,
}) : super(key: key);

/// text to be linkified
final String text;

/// [textStyle] applied the text
final TextStyle? textStyle;

/// [textStyle] added to the formatted links in the text
final TextStyle? linkStyle;

/// called when a formatted link is pressed, it returns the link as a parameter
/// ```dart
/// LinkifyText("#helloWorld", onTap: (link) {
/// // do stuff with link
/// print("${link.value} hashtag was tapped");
/// });
/// ```
final void Function(Link)? onTap;

/// option to override the links to be formatted in the text, defaults to `[LinkType.url]`
/// so only urls are being linkified in the text
final List<LinkType>? linkTypes;

/// {@macro flutter.painting.textPainter.strutStyle}
final StrutStyle? strutStyle;

/// How the text should be aligned horizontally.
final TextAlign? textAlign;

/// The directionality of the text.
///
/// This decides how [textAlign] values like [TextAlign.start] and
/// [TextAlign.end] are interpreted.
///
/// This is also used to disambiguate how to render bidirectional text. For
/// example, if the [data] is an English phrase followed by a Hebrew phrase,
/// in a [TextDirection.ltr] context the English phrase will be on the left
/// and the Hebrew phrase to its right, while in a [TextDirection.rtl]
/// context, the English phrase will be on the right and the Hebrew phrase on
/// its left.
///
/// Defaults to the ambient [Directionality], if any.
final TextDirection? textDirection;

/// Used to select a font when the same Unicode character can
/// be rendered differently, depending on the locale.
///
/// It's rarely necessary to set this property. By default its value
/// is inherited from the enclosing app with `Localizations.localeOf(context)`.
///
/// See [RenderParagraph.locale] for more information.
final Locale? locale;

/// Whether the text should break at soft line breaks.
///
/// If false, the glyphs in the text will be positioned as if there was unlimited horizontal space.
final bool? softWrap;

/// How visual overflow should be handled.
///
/// Defaults to retrieving the value from the nearest [DefaultTextStyle] ancestor.
final TextOverflow? overflow;

/// The number of font pixels for each logical pixel.
///
/// For example, if the text scale factor is 1.5, text will be 50% larger than
/// the specified font size.
///
/// The value given to the constructor as textScaleFactor. If null, will
/// use the [MediaQueryData.textScaler] obtained from the ambient
/// [MediaQuery], or 1.0 if there is no [MediaQuery] in scope.
final TextScaler? textScaler;

/// An optional maximum number of lines for the text to span, wrapping if necessary.
/// If the text exceeds the given number of lines, it will be truncated according
/// to [overflow].
///
/// If this is 1, text will not wrap. Otherwise, text will be wrapped at the
/// edge of the box.
///
/// If this is null, but there is an ambient [DefaultTextStyle] that specifies
/// an explicit number for its [DefaultTextStyle.maxLines], then the
/// [DefaultTextStyle] value will take precedence. You can use a [RichText]
/// widget directly to entirely override the [DefaultTextStyle].
final List<LinkType>? linkTypes;
final ThemeData? themeData;
final Function(Link)? onTapLink;
final Function(TapDownDetails, Link)? onTapDownLink;
final int? maxLines;

/// An alternative semantics label for this text.
///
/// If present, the semantics of this widget will contain this value instead
/// of the actual text. This will overwrite any of the semantics labels applied
/// directly to the [TextSpan]s.
///
/// This is useful for replacing abbreviations or shorthands with the full
/// text value:
///
/// ```dart
/// Text(r'$$', semanticsLabel: 'Double dollars')
/// ```
final String? semanticsLabel;

/// {@macro flutter.painting.textPainter.textWidthBasis}
final TextWidthBasis? textWidthBasis;

final Map<LinkType, TextStyle>? customLinkStyles;

final void Function(TapDownDetails, Link)? onTapDownLink;

final ThemeData? themeData;
const MatrixLinkifyText({
Key? key,
required this.text,
this.textStyle,
this.linkStyle,
this.textAlign = TextAlign.start,
this.maxLines,
this.linkTypes,
this.themeData,
this.onTapLink,
this.onTapDownLink,
}) : super(key: key);

@override
Widget build(BuildContext context) {
return Text.rich(
return CleanRichText(
LinkifyTextSpans(
text: text,
textStyle: textStyle,
linkStyle: linkStyle,
onTapLink: onTap,
onTapDownLink: onTapDownLink,
themeData: themeData,
linkTypes: linkTypes,
customLinkStyles: customLinkStyles,
themeData: themeData,
onTapLink: onTapLink,
onTapDownLink: onTapDownLink,
),
key: key,
style: textStyle,
strutStyle: strutStyle,
textAlign: textAlign,
textDirection: textDirection,
textScaler: textScaler,
textWidthBasis: textWidthBasis,
semanticsLabel: semanticsLabel,
softWrap: softWrap,
overflow: overflow,
maxLines: maxLines,
locale: locale,
);
}
}
Expand Down Expand Up @@ -291,25 +174,26 @@ TextSpan LinkifyTextSpans({
decoration: TextDecoration.underline,
);

final _regExp =
constructMatrixRegExpFromLinkType(linkTypes ?? [LinkType.url]);
final regExp = constructMatrixRegExpFromLinkType(linkTypes ?? [LinkType.url]);

// return the full text if there's no match or if empty
if (!_regExp.hasMatch(text) || text.isEmpty) {
if (!regExp.hasMatch(text) || text.isEmpty) {
return TextSpan(
text: text,
style: textStyle,
children: const [],
);
}

final texts = text.split(_regExp);
final texts = text.split(regExp);
final List<InlineSpan> spans = [];
final highlights = _regExp.allMatches(text).toList();
final highlights = regExp.allMatches(text).toList();

for (final text in texts) {
spans.add(TextSpan(
text: text,
style: textStyle,
children: const [],
));

if (highlights.isNotEmpty) {
Expand All @@ -319,6 +203,7 @@ TextSpan LinkifyTextSpans({
spans.add(TextSpan(
text: link.value,
style: textStyle,
children: const [],
));
continue;
}
Expand Down