Surprising behavior of maxLines: null, overflow:ellipsis in the Text widget

[akireyev]

Text("<long text that spans many lines>", overflow: TextOverflow.ellipsis, maxLines: null)

Renders just a single line of text, and ellipsizes out the rest.
But

Text("<long text that spans many lines>", overflow: TextOverflow.ellipsis, maxLines: 1000)

Renders multiple lines.

[zoechi]

Perhaps

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.

https://docs.flutter.io/flutter/widgets/Text/maxLines.html

[akireyev]

There's no DefaultTextStyle override for maxLines, I have verified that in the debugger. maxLines = null goes all the way down to the TextPainter, which is actually the source of this behavior.

[zoechi]

Please add the output of flutter doctor -v.

[akireyev]

https://paste.googleplex.com/5548663027793920

[zoechi]

@akireyev sorry, wasn't aware you're a Googler

[zoechi]

/cc @HansMuller

[justinmc]

Here's what the current behavior is for all relevant combinations of overflow and maxLines:

	maxLines: null	maxLines: 1000
overflow: null	many lines	many lines
overflow: ellipsis	one line	many lines

The surprising behavior is the one case where Text shows a single line. I'll try to gauge whether or not that's expected and what it would take to change if not.