Create a deterministic screen snapshot

The returned base R list is independent of jsonlite and has a stable schema_version field. Runs are row-major and represent adjacent cells with the same foreground, background, and attribute mask.

Usage

screen_snapshot(x, width = 80, height = 24)

Arguments

x

A widget, Screen, App, or ScreenBuffer.

width, height

Frame size in cells.

Value

A termr_screen_snapshot list.

Examples

screen_snapshot(label("Hello"), width = 20, height = 2)
#> $schema_version
#> [1] 1
#> 
#> $width
#> [1] 20
#> 
#> $height
#> [1] 2
#> 
#> $lines
#> [1] "Hello               " "                    "
#> 
#> $runs
#> $runs[[1]]
#> $runs[[1]]$x
#> [1] 1
#> 
#> $runs[[1]]$y
#> [1] 1
#> 
#> $runs[[1]]$width
#> [1] 20
#> 
#> $runs[[1]]$text
#> [1] "Hello               "
#> 
#> $runs[[1]]$fg
#> [1] ""
#> 
#> $runs[[1]]$bg
#> [1] ""
#> 
#> $runs[[1]]$attrs
#> [1] 0
#> 
#> 
#> $runs[[2]]
#> $runs[[2]]$x
#> [1] 1
#> 
#> $runs[[2]]$y
#> [1] 2
#> 
#> $runs[[2]]$width
#> [1] 20
#> 
#> $runs[[2]]$text
#> [1] "                    "
#> 
#> $runs[[2]]$fg
#> [1] ""
#> 
#> $runs[[2]]$bg
#> [1] ""
#> 
#> $runs[[2]]$attrs
#> [1] 0
#> 
#> 
#> 
#> attr(,"class")
#> [1] "termr_screen_snapshot"