put css-typst translation in brand.lua

unclear if this is a win, since it forces get_background_color to reside in modules/brand.lua

src/resources/filters/modules/brand/brand.lua

@@ -3,9 +3,29 @@
 
 local function get_color(name)
   local brand = param("brand").processedData -- from src/core/brand/brand.ts
-  return brand.color[name]
+  local cssColor = brand.color[name]
+  if not cssColor then return nil end
+  if _quarto.format.isTypstOutput() then
+    return output_typst_color(parse_css_color(cssColor))
+  end
+  return cssColor
+end
+
+local BACKGROUND_OPACITY = 0.1
+
+local function get_background_color(name)
+  local brand = param("brand").processedData -- from src/core/brand/brand.ts
+  local cssColor = brand.color[name]
+  if not cssColor then return nil end
+  if _quarto.format.isTypstOutput() then
+    return output_typst_color(parse_css_color(cssColor), {unit = 'fraction', value = BACKGROUND_OPACITY})
+  end
+  -- todo: implement for html if useful
+  return cssColor
 end
 
 return {
-  get_color = get_color
+  BACKGROUND_OPACITY = BACKGROUND_OPACITY,
+  get_color = get_color,
+  get_background_color = get_background_color,
 }

src/resources/filters/modules/import_all.lua

@@ -4,6 +4,7 @@
 _quarto.modules = {
   astshortcode = require("modules/astshortcode"),
   authors = require("modules/authors"),
+  brand = require("modules/brand/brand"),
   callouts = require("modules/callouts"),
   classpredicates = require("modules/classpredicates"),
   constants = require("modules/constants"),

src/resources/filters/quarto-post/typst-brand-yaml.lua

@@ -42,16 +42,15 @@ function render_typst_brand_yaml()
       if brand and brand.processedData and brand.processedData.color and next(brand.processedData.color) then
         local brandColor = brand.processedData.color
         local colors = {}
-        for name, color in pairs(brandColor) do
-          colors[name] = output_typst_color(parse_css_color(color))
+        for name, _ in pairs(brandColor) do
+          colors[name] = _quarto.modules.brand.get_color(name)
         end
         local decl = '#let brand-color = ' .. to_typst_dict_indent(colors)
         quarto.doc.include_text('in-header', decl)
         local BACKGROUND_OPACITY = 0.1
         local themebk = {}
-        for name, color in pairs(brandColor) do
-          themebk[name] = output_typst_color(parse_css_color(color),
-            {unit = 'fraction', value = BACKGROUND_OPACITY})
+        for name, _ in pairs(brandColor) do
+          themebk[name] = _quarto.modules.brand.get_background_color(name)
         end
         -- for demo purposes only, should implement backgroundcolor and fontcolor
         if brandColor.background then
@@ -60,7 +59,7 @@ function render_typst_brand_yaml()
         if brandColor.foreground then
           quarto.doc.include_text('in-header', '#set text(fill: brand-color.foreground)')
         end
-        local decl = '// theme colors at opacity ' .. BACKGROUND_OPACITY .. '\n#let brand-color-background = ' .. to_typst_dict_indent(themebk)
+        local decl = '// theme colors at opacity ' .. _quarto.modules.brand.BACKGROUND_OPACITY .. '\n#let brand-color-background = ' .. to_typst_dict_indent(themebk)
         quarto.doc.include_text('in-header', decl)
       end
     end,

tests/docs/smoke-all/typst/brand-yaml/color/posit/brand-color.qmd

@@ -10,6 +10,7 @@ _quarto:
         -
           - 'burgundy: rgb\("#9a4665"\),'
           - 'primary: rgb\("#447099"\),'
+          - 'primary: rgb\("#44709919"\),' # background
           - 'title: (\r\n?|\n)\[(\r\n?|\n)Note(\r\n?|\n)\](\r\n?|\n), (\r\n?|\n)background_color: (\r\n?|\n)brand-color-background.primary'
           - 'title: (\r\n?|\n)\[(\r\n?|\n)Warning(\r\n?|\n)\](\r\n?|\n), (\r\n?|\n)background_color: (\r\n?|\n)brand-color-background.warning'
         -