Add ReadMoreText.rich constructor

[maRci002]

closes #38

This PR enables the direct use of TextSpan instead of a plain String. In this case, annotations won't be triggered since the developer has total control over styling and adding interactions to parts of the text.

[maRci002]

@jonataslaw, TrimMode.Length works fine; however, TrimMode.line sometimes displays the 'Show more' button on the next line. I suspect the issue lies with DefaultTextStyle — it seems something is inherited during the text rendering but not when laying out to measure it.

Any ideas?

Text layout measurement should work fine since annotations already create a custom TextSpan, so this one should work fine as well.

        final dataTextSpan = widget.richData ??
            _buildAnnotatedTextSpan(
              data: widget.data!,
              textStyle: effectiveTextStyle,
              regExp: regExp,
              annotations: widget.annotations,
            );

[maRci002]

The issue was with Text.rich, a higher-level widget that may introduce additional fields to RichText. However, in this case, we needed the rendering/layout to be perfectly identical.

[maRci002]

I need to check whether DefaultTextStyle is respected

[maRci002]

PR is ready for review

[jonataslaw]

It is a regression of #35 ?
I couldn't test to be sure if this brings back the problem, but we need to double check this.

[maRci002]

final defaultTextStyle = DefaultTextStyle.of(context);
var effectiveTextStyle = widget.style;
if (widget.style == null || widget.style!.inherit) {
  effectiveTextStyle = defaultTextStyle.style.merge(widget.style);
}

The effectiveTextStyle will never be null:

• If widget.style is null, then effectiveTextStyle will be equal to defaultTextStyle.
• If widget.style has inherit set to true, effectiveTextStyle will be a merge of defaultTextStyle and widget.style.
• If widget.style has inherit set to false, effectiveTextStyle will be set according to widget.style and will not be overwritten by defaultTextStyle.

But I rewrote logic to make it more explicit:

final defaultTextStyle = DefaultTextStyle.of(context);
TextStyle effectiveTextStyle;
if (widget.style == null || widget.style!.inherit) {
  effectiveTextStyle = defaultTextStyle.style.merge(widget.style);
} else {
  effectiveTextStyle = widget.style!;
}

[jonataslaw]

Wow, it is amazing!

[jonataslaw]

LGTM