TextInput with no-wrap and manual newlines messes up text rendering

[ubruhin]

Bug Description

When having newlines in the text property of TextInput, I expect them to be rendered. Currently they are rendered only when word wrap is enabled, but this may add even more linebreaks than intended. Manual newlines should always be rendered, no matter what wrap mode is set.

With winit the rendering is even broken:

Reproducible Code (if applicable)

export component AppWindow inherits Window {
    width: 200px;
    height: 200px;

    TextInput {
        text: "Foo\nBar";
    }
}

Environment Details

• Slint Version: 1.9.2
• Platform/OS: Ubuntu 22.04, X11
• Backend/Renderer: winit

Product Impact

Use-case in LibrePCB (not a blocker for now):

[ogoffart]

I'm going to close as duplicate of #7413
Same problem that when single-line:true (the default) we get rendering divergences.
I'm going to edit the description of #7416 to merge the two issue