Alignment of long text without word wrap

[jamesthurley]

As per the Zulip discussion here.

My code currently looks like this:

    let max_advance = if text_context.wrap {
        width_constraint
    } else {
        Some(f32::MAX)
    };
    layout.break_all_lines(max_advance);
    layout.align(
        width_constraint,
        match text_context.horizontal_alignment {
            HorizontalAlignment::Center => Alignment::Middle,
            HorizontalAlignment::Right => Alignment::End,
            HorizontalAlignment::Left => Alignment::Start,
        },
    );

When word wrap is off I've found I still need to call break_all_lines and I still need to supply a max_advance, so I set it to f32::MAX. This is fine.

This code is all working well, except for the cases where word wrap is off, the text is longer than the width constraint, and the text alignment is Middle or End.

The result is as follows:

There are 9 tests here. First three left aligned, then right aligned, then centered. Within each set of three tests the middle test case is the problematic one - you can see in all three cases it gets left-aligned.

The expected behaviour was that the left side of the right-aligned text would be cropped, and both sides of the centered text would be cropped. Although with further thought I can see that chopping off the start of the text may not always be desirable.

After the discussion on Zulip it was decided I should create a GitHub issue.