[XamlIl] Preserve whitspace

[Gillibald]

We need a way to preserve whitespaces if needed to be able to define inlines in XAML

If we have something like this:

<StackPanel Orientation="Vertical" Spacing="8">
    <TextBlock>A simple TextBlock with unformatted text.</TextBlock>
    <TextBlock>
        A <Run Classes="code">TextBlock</Run> with <Run FontWeight="Bold">differing</Run>
        <Run FontStyle="Italic">styles</Run> <Run FontSize="24">and fonts</Run>.
    </TextBlock>
    <TextBlock>
        A <Run Classes="code" Foreground="Gray">TextBlock</Run> with <Run Foreground="Red">differing</Run>
        <Run Foreground="Green">colors</Run>.
    </TextBlock>
    <TextBlock>
        A <Run Classes="code">TextBlock</Run> with <Run Foreground="Orange" FontStyle="Italic" Text="{Binding}"/>.
    </TextBlock>
    <TextBlock>
        A <Run Classes="code">TextBlock</Run> with a <LineBreak/> line break.
    </TextBlock>
</StackPanel>

We need to preserve whitespaces. Portable.Xaml was patched to support this by decorating the InlinesCollection with a special attribute.

This is the current result:

Can be tested with: #2423

[FoggyFinder]

any updates? workarounds?

[Kira-NT]

If anyone will face this problem, here's little trick to force whitespace preserving: use \u200f\u200f\u200e\u0020\u200e instead of regular space (\u0020):

• \u200f - Right-to-left mark
• \u200f - Right-to-left mark
• \u200e - Left-to-right mark
• \u0020 - space ( )
• \u200e - Left-to-right mark

Result: ‏‏‎ ‎

[shartte]

XAML specification for white space: https://docs.microsoft.com/en-us/dotnet/desktop/xaml-services/white-space-processing

Avalonia also doesn't collapse white space in WPF like WPF does.

[shartte]

See kekekeks/XamlX#43