[vim/vim] Virtual Text property at same location as other text property not drawn (Issue #10879)

[Ben Jackson]

Steps to reproduce

call prop_type_add( 'Virtual', #{ highlight: 'Error' } )
call prop_type_add( 'Function', #{ highlight: 'Function' } )
call prop_type_add( 'Identifier', #{ highlight: 'Identifier' } )

  " function( call, argument, here )

call prop_add( 5, 5, #{ type: 'Function', length: len( 'function' ) } )
call prop_add( 5, 15, #{ type: 'Identifier', length: len( 'call' ) } )
call prop_add( 5, 21, #{ type: 'Identifier', length: len( 'argument' ) } )
call prop_add( 5, 31, #{ type: 'Identifier', length: len( 'here' ) } )


call prop_add( 5, 15, #{ type: 'Virtual', text: 'name1:' } )
call prop_add( 5, 21, #{ type: 'Virtual', text: 'name2:' } )
call prop_add( 5, 31, #{ type: 'Virtual', text: 'name3:' } )

vim --clean -S test.vim test.vim

See how the 'name1:', etc. are not rendered. They also cause the cursor to be in the wrong position in the line (move cursor along line 5 to replicate).

Expected behaviour

Reversing the calls, so that the 'virtual text' property is added first resolves it and works well:

call prop_type_add( 'Virtual', #{ highlight: 'Error' } )
call prop_type_add( 'Function', #{ highlight: 'Function' } )
call prop_type_add( 'Identifier', #{ highlight: 'Identifier' } )

  " function( call, argument, here )


call prop_add( 5, 15, #{ type: 'Virtual', text: 'name1:' } )
call prop_add( 5, 21, #{ type: 'Virtual', text: 'name2:' } )
call prop_add( 5, 31, #{ type: 'Virtual', text: 'name3:' } )

call prop_add( 5, 5, #{ type: 'Function', length: len( 'function' ) } )
call prop_add( 5, 15, #{ type: 'Identifier', length: len( 'call' ) } )
call prop_add( 5, 21, #{ type: 'Identifier', length: len( 'argument' ) } )
call prop_add( 5, 31, #{ type: 'Identifier', length: len( 'here' ) } )

I'd expect these two to be equivalent.

Version of Vim

9.0.181

Environment

macOS arm64

Logs and stack traces

No response

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[Bram Moolenaar]

Closed #10879 as completed via 952c9b0.

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