Issues deleting whitespace with backspace when Vue plugin is enabled and active

[kinglozzer]

This only seems to occur when the Vue plugin is enabled and the project in question has Vue components to “activate” the plugin (using PsiViewer, the file is parsed in both Silverstripe and Vue languages).

This template appears to trigger it consistently:

<div class="element">
    <div class="typography">
        <h2>Something</h2>
    </div>
</div>

Backspace won’t clear the whitespace before the opening <h2> tag, but the delete key will.

Things to investigate:

• Why Vue parses .ss files, but not .html files
• Whether parsing whitespace as separate PsiWhiteSpace elements instead of one big SS_TEXT lump will solve this
• Whether we can (or should) prevent Vue from parsing .ss files - this probably isn’t desirable
• Whether we’d be better switching to something more “embedded” within HTML like Vue & Angular do. Would be a big job, no guarantee it’ll fix this...