Update theme preview scripts and screenshots (#909)

Lots of changes - Pretty every change needed to be made before updating
the preview screenshots, so they all end up in the same PR here:

* `preview-generate-screenshots.nu` now generates the previews and
screenshots all in one pass rather than requiring a separate file.

* Adds a new method for generating screenshots using PowerShell with no
third-party application required. Created new function for choosing the
method that is used to generate screenshots.

* Fixes background color on `nushell-dark` and `nushell-light` themes.

* Fixes bug where `cursor` setting (and perhaps one other) was getting
dropped from the preview table (`math ceil` was needed rather than `math
floor`)

* Fixes `cellpath` setting - Was changed to `cell-path` a while back but
never updated in the themes. All themes and their previews were
regenerated. Custom themes were manually adjusted.

* **Important:** I did not update `make.nu` to fix this (yet) since
@amtoine has a open PR against it that has not been merged yet. Easier
to either put that change in that PR or do it after that one has been
merged.

* Adds `mod.nu` in the root of the `themes` module. Moves some of the
previous script commands such as `preview_terminal`,
`preview_theme_small`, etc. over to the module. Makes for cleaner usage.

* Note: The completion functions in the scripts have been broken for
several months. I did not fix this at this point.

* `preview_theme_small` (and others) renamed to use spaces in command
name, so it is now `preview theme small`.

* Fixes bug of my own making that prevented several custom themes from
working.

* Refactors the "list to columns" code to use `group` (will need to be
updated to `chunks` in 0.96)
* Suppresses the indices column in the preview table
* Removes the column headers entirely since they don't serve any purpose
in this type of "columnar table"

themes/src/preview-theme.nu → themes/mod.nu

@@ -1,5 +1,5 @@
 # Preview the current nushell theme
-def preview_theme [] {
+export def "preview theme" [] {
     let ansi_names = (ansi --list | get name)
     let all_ansi_names = $ansi_names ++ (ansi --list | get 'short name' | range 133..388)
     let color_config = ($env.config.color_config | transpose key value)
@@ -64,7 +64,7 @@ def preview_small [theme: string@"nu-complete list themes"] {
 }
 
 # Preview the current nushell theme, small mode
-def preview_theme_small [] {
+export def "preview theme small" [] {
     let ansi_names = (ansi --list | get name)
     let all_ansi_names = $ansi_names ++ (ansi --list | get 'short name' | range 133..388)
     let color_config = ($env.config.color_config | transpose key value)
@@ -86,6 +86,8 @@ def preview_theme_small [] {
         } else {
           [[key]; [$source_code_replaced]]
         }
+      } else if ($row.key == 'background') {
+        [[key]; [$"($row.key) - ($row.value)"]]
       } else if ($row.value | describe | str contains 'record') {
         [[key]; [$"(ansi ($row.value))($row.key) - ($row.value)(ansi reset)"]]
       } else if ($row.value | str starts-with '#') {
@@ -103,10 +105,56 @@ def preview_theme_small [] {
     # echo $table1 | merge $table2
 
     # This draws the table with three tables merged
-    let row_count = ($color_table | length)
-    let row_count_third = (($color_table | length) / 3 | math floor)
-    let table1 = ($color_table | range 0..$row_count_third | rename key1 val1)
-    let table2 = ($color_table | range $row_count_third..($row_count_third * 2) | rename key2 val2)
-    let table3 = ($color_table | range ($row_count_third * 2)..$row_count | rename key3 val3)
-    echo $table1 | merge $table2 | merge $table3
+    let row_count = (
+      $color_table
+      | length
+      | $in / 3
+      | math ceil
+    )
+
+    #return ($color_table | group 19)
+
+    let table1 = ($color_table | group $row_count | get 0 | rename "Column 1")
+    let table2 = ($color_table | group $row_count | get 1 | rename "Column 2")
+    let table3 = ($color_table | group $row_count | get 2 | rename "Column 3")
+
+    $table1
+    | merge $table2
+    | merge $table3
+    | default '' "Column 3"
+    | table -e -i false
+      # Remove heading
+    | str replace -r '^([^\n]+)(\n[^\n]+){2}' '$1'
 }
+
+# Preview what your terminal theme looks like
+export def 'preview terminal' [] {
+    def preview [attr: string] {
+        let color = $in
+        $"(ansi -e {fg: $color attr: $attr})($color)(ansi reset)"
+    }
+
+    let colors = [
+        [normal   rgb];
+
+        [black   '#000000']
+        [red     '#FF0000']
+        [green   '#00FF00']
+        [yellow  '#FFFF00']
+        [blue    '#0000FF']
+        [magenta '#FF00FF']
+        [purple  '#FF00FF']
+        [cyan    '#00FFFF']
+        [white   '#FFFFFF']
+    ]
+
+    $colors | each {|color| {
+        dimmed: ($color.normal | preview d)
+        normal: ($color.normal | preview n)
+        bold: ($color.normal | preview b)
+
+        rgb_dimmed: ($color.rgb | preview d)
+        rgb_normal: ($color.rgb | preview n)
+        rgb_bold: ($color.rgb | preview b)
+    }}
+}

themes/nu-themes/3024-day.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#a5a2a2'
         nothing: '#a5a2a2'
         binary: '#a5a2a2'
-        cellpath: '#a5a2a2'
+        cell-path: '#a5a2a2'
         row_index: { fg: '#01a252' attr: 'b' }
         record: '#a5a2a2'
         list: '#a5a2a2'

themes/nu-themes/3024-night.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#a5a2a2'
         nothing: '#a5a2a2'
         binary: '#a5a2a2'
-        cellpath: '#a5a2a2'
+        cell-path: '#a5a2a2'
         row_index: { fg: '#01a252' attr: 'b' }
         record: '#a5a2a2'
         list: '#a5a2a2'

themes/nu-themes/3024.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#a5a2a2'
         nothing: '#a5a2a2'
         binary: '#a5a2a2'
-        cellpath: '#a5a2a2'
+        cell-path: '#a5a2a2'
         row_index: { fg: '#01a252' attr: 'b' }
         record: '#a5a2a2'
         list: '#a5a2a2'

themes/nu-themes/abyss.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#a0cce2'
         nothing: '#a0cce2'
         binary: '#a0cce2'
-        cellpath: '#a0cce2'
+        cell-path: '#a0cce2'
         row_index: { fg: '#10598b' attr: 'b' }
         record: '#a0cce2'
         list: '#a0cce2'

themes/nu-themes/aci.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#b6b6b6'
         nothing: '#b6b6b6'
         binary: '#b6b6b6'
-        cellpath: '#b6b6b6'
+        cell-path: '#b6b6b6'
         row_index: { fg: '#83ff08' attr: 'b' }
         record: '#b6b6b6'
         list: '#b6b6b6'

themes/nu-themes/aco.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#bebebe'
         nothing: '#bebebe'
         binary: '#bebebe'
-        cellpath: '#bebebe'
+        cell-path: '#bebebe'
         row_index: { fg: '#83ff08' attr: 'b' }
         record: '#bebebe'
         list: '#bebebe'

themes/nu-themes/adventuretime.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#f8dcc0'
         nothing: '#f8dcc0'
         binary: '#f8dcc0'
-        cellpath: '#f8dcc0'
+        cell-path: '#f8dcc0'
         row_index: { fg: '#4ab118' attr: 'b' }
         record: '#f8dcc0'
         list: '#f8dcc0'

themes/nu-themes/afterglow.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#d0d0d0'
         nothing: '#d0d0d0'
         binary: '#d0d0d0'
-        cellpath: '#d0d0d0'
+        cell-path: '#d0d0d0'
         row_index: { fg: '#7b9246' attr: 'b' }
         record: '#d0d0d0'
         list: '#d0d0d0'

themes/nu-themes/alien-blood.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#647d75'
         nothing: '#647d75'
         binary: '#647d75'
-        cellpath: '#647d75'
+        cell-path: '#647d75'
         row_index: { fg: '#2f7e25' attr: 'b' }
         record: '#647d75'
         list: '#647d75'

themes/nu-themes/alucard.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#bbbbbb'
         nothing: '#bbbbbb'
         binary: '#bbbbbb'
-        cellpath: '#bbbbbb'
+        cell-path: '#bbbbbb'
         row_index: { fg: '#fa0074' attr: 'b' }
         record: '#bbbbbb'
         list: '#bbbbbb'

themes/nu-themes/amora.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#dedbeb'
         nothing: '#dedbeb'
         binary: '#dedbeb'
-        cellpath: '#dedbeb'
+        cell-path: '#dedbeb'
         row_index: { fg: '#a2baa8' attr: 'b' }
         record: '#dedbeb'
         list: '#dedbeb'

themes/nu-themes/apathy.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#81b5ac'
         nothing: '#81b5ac'
         binary: '#81b5ac'
-        cellpath: '#81b5ac'
+        cell-path: '#81b5ac'
         row_index: { fg: '#883e96' attr: 'b' }
         record: '#81b5ac'
         list: '#81b5ac'

themes/nu-themes/apprentice.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#bcbcbc'
         nothing: '#bcbcbc'
         binary: '#bcbcbc'
-        cellpath: '#bcbcbc'
+        cell-path: '#bcbcbc'
         row_index: { fg: '#87af87' attr: 'b' }
         record: '#bcbcbc'
         list: '#bcbcbc'

themes/nu-themes/argonaut.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#ffffff'
         nothing: '#ffffff'
         binary: '#ffffff'
-        cellpath: '#ffffff'
+        cell-path: '#ffffff'
         row_index: { fg: '#8ce10b' attr: 'b' }
         record: '#ffffff'
         list: '#ffffff'

themes/nu-themes/arthur.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#bbaa99'
         nothing: '#bbaa99'
         binary: '#bbaa99'
-        cellpath: '#bbaa99'
+        cell-path: '#bbaa99'
         row_index: { fg: '#86af80' attr: 'b' }
         record: '#bbaa99'
         list: '#bbaa99'

themes/nu-themes/ashes.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#c7ccd1'
         nothing: '#c7ccd1'
         binary: '#c7ccd1'
-        cellpath: '#c7ccd1'
+        cell-path: '#c7ccd1'
         row_index: { fg: '#95c7ae' attr: 'b' }
         record: '#c7ccd1'
         list: '#c7ccd1'

themes/nu-themes/atelier-cave-light.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#585260'
         nothing: '#585260'
         binary: '#585260'
-        cellpath: '#585260'
+        cell-path: '#585260'
         row_index: { fg: '#2a9292' attr: 'b' }
         record: '#585260'
         list: '#585260'

themes/nu-themes/atelier-cave.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#8b8792'
         nothing: '#8b8792'
         binary: '#8b8792'
-        cellpath: '#8b8792'
+        cell-path: '#8b8792'
         row_index: { fg: '#2a9292' attr: 'b' }
         record: '#8b8792'
         list: '#8b8792'

themes/nu-themes/atelier-dune-light.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#6e6b5e'
         nothing: '#6e6b5e'
         binary: '#6e6b5e'
-        cellpath: '#6e6b5e'
+        cell-path: '#6e6b5e'
         row_index: { fg: '#60ac39' attr: 'b' }
         record: '#6e6b5e'
         list: '#6e6b5e'

themes/nu-themes/atelier-dune.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#a6a28c'
         nothing: '#a6a28c'
         binary: '#a6a28c'
-        cellpath: '#a6a28c'
+        cell-path: '#a6a28c'
         row_index: { fg: '#60ac39' attr: 'b' }
         record: '#a6a28c'
         list: '#a6a28c'

themes/nu-themes/atelier-estuary-light.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#5f5e4e'
         nothing: '#5f5e4e'
         binary: '#5f5e4e'
-        cellpath: '#5f5e4e'
+        cell-path: '#5f5e4e'
         row_index: { fg: '#7d9726' attr: 'b' }
         record: '#5f5e4e'
         list: '#5f5e4e'

themes/nu-themes/atelier-estuary.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#929181'
         nothing: '#929181'
         binary: '#929181'
-        cellpath: '#929181'
+        cell-path: '#929181'
         row_index: { fg: '#7d9726' attr: 'b' }
         record: '#929181'
         list: '#929181'

themes/nu-themes/atelier-forest-light.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#68615e'
         nothing: '#68615e'
         binary: '#68615e'
-        cellpath: '#68615e'
+        cell-path: '#68615e'
         row_index: { fg: '#7b9726' attr: 'b' }
         record: '#68615e'
         list: '#68615e'

themes/nu-themes/atelier-forest.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#a8a19f'
         nothing: '#a8a19f'
         binary: '#a8a19f'
-        cellpath: '#a8a19f'
+        cell-path: '#a8a19f'
         row_index: { fg: '#7b9726' attr: 'b' }
         record: '#a8a19f'
         list: '#a8a19f'

themes/nu-themes/atelier-heath-light.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#695d69'
         nothing: '#695d69'
         binary: '#695d69'
-        cellpath: '#695d69'
+        cell-path: '#695d69'
         row_index: { fg: '#918b3b' attr: 'b' }
         record: '#695d69'
         list: '#695d69'

themes/nu-themes/atelier-heath.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#ab9bab'
         nothing: '#ab9bab'
         binary: '#ab9bab'
-        cellpath: '#ab9bab'
+        cell-path: '#ab9bab'
         row_index: { fg: '#918b3b' attr: 'b' }
         record: '#ab9bab'
         list: '#ab9bab'

themes/nu-themes/atelier-lakeside-light.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#516d7b'
         nothing: '#516d7b'
         binary: '#516d7b'
-        cellpath: '#516d7b'
+        cell-path: '#516d7b'
         row_index: { fg: '#568c3b' attr: 'b' }
         record: '#516d7b'
         list: '#516d7b'

themes/nu-themes/atelier-lakeside.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#7ea2b4'
         nothing: '#7ea2b4'
         binary: '#7ea2b4'
-        cellpath: '#7ea2b4'
+        cell-path: '#7ea2b4'
         row_index: { fg: '#568c3b' attr: 'b' }
         record: '#7ea2b4'
         list: '#7ea2b4'

themes/nu-themes/atelier-plateau-light.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#585050'
         nothing: '#585050'
         binary: '#585050'
-        cellpath: '#585050'
+        cell-path: '#585050'
         row_index: { fg: '#4b8b8b' attr: 'b' }
         record: '#585050'
         list: '#585050'

themes/nu-themes/atelier-plateau.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#8a8585'
         nothing: '#8a8585'
         binary: '#8a8585'
-        cellpath: '#8a8585'
+        cell-path: '#8a8585'
         row_index: { fg: '#4b8b8b' attr: 'b' }
         record: '#8a8585'
         list: '#8a8585'

themes/nu-themes/atelier-savanna-light.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#526057'
         nothing: '#526057'
         binary: '#526057'
-        cellpath: '#526057'
+        cell-path: '#526057'
         row_index: { fg: '#489963' attr: 'b' }
         record: '#526057'
         list: '#526057'

themes/nu-themes/atelier-savanna.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#87928a'
         nothing: '#87928a'
         binary: '#87928a'
-        cellpath: '#87928a'
+        cell-path: '#87928a'
         row_index: { fg: '#489963' attr: 'b' }
         record: '#87928a'
         list: '#87928a'

themes/nu-themes/atelier-seaside-light.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#5e6e5e'
         nothing: '#5e6e5e'
         binary: '#5e6e5e'
-        cellpath: '#5e6e5e'
+        cell-path: '#5e6e5e'
         row_index: { fg: '#29a329' attr: 'b' }
         record: '#5e6e5e'
         list: '#5e6e5e'

themes/nu-themes/atelier-seaside.nu

@@ -37,7 +37,7 @@ export def main [] {
         string: '#8ca68c'
         nothing: '#8ca68c'
         binary: '#8ca68c'
-        cellpath: '#8ca68c'
+        cell-path: '#8ca68c'
         row_index: { fg: '#29a329' attr: 'b' }
         record: '#8ca68c'
         list: '#8ca68c'