brand,logo,lua - add support for resolving logo images in brand short…

src/core/brand/brand.ts

@@ -51,7 +51,12 @@ type CanonicalLogoInfo = {
 type ProcessedBrandData = {
   color: Record<string, string>;
   typography: BrandTypography;
-  logo: Record<string, CanonicalLogoInfo>;
+  logo: {
+    small?: CanonicalLogoInfo;
+    medium?: CanonicalLogoInfo;
+    large?: CanonicalLogoInfo;
+    images: Record<string, BrandLogoExplicitResource>;
+  };
 };
 
 export class Brand {
@@ -139,7 +144,7 @@ export class Brand {
       };
     }
 
-    const logo: Record<string, CanonicalLogoInfo> = {};
+    const logo: ProcessedBrandData["logo"] = { images: {} };
     for (
       const size of [
         "small",
@@ -151,6 +156,13 @@ export class Brand {
       if (v) {
         logo[size] = v;
       }
+      for (const [key, value] of Object.entries(data.logo?.images ?? {})) {
+        if (typeof value === "string") {
+          logo.images[key] = { path: value };
+        } else {
+          logo.images[key] = value;
+        }
+      }
     }
 
     return {

src/format/reveal/format-reveal.ts

@@ -379,8 +379,9 @@ export function revealjsFormat() {
 const determineRevealLogo = (format: Format): string | undefined => {
   const brandData = format.render.brand?.processedData;
   if (brandData?.logo) {
+    const keys: ("medium" | "small" | "large")[] = ["medium", "small", "large"]
     // add slide logo if we have one
-    for (const size of ["medium", "small", "large"]) {
+    for (const size of keys) {
       const logoInfo = brandData.logo[size];
       if (!logoInfo) {
         continue;

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

@@ -56,7 +56,7 @@ local function get_logo(name)
   local brand = param("brand")
   brand = brand and brand.processedData -- from src/core/brand/brand.ts
   if not brand then return nil end
-  return brand.logo and brand.logo[name]
+  return brand.logo and (brand.logo[name] or brand.logo.images[name])
 end
 
 return {

src/resources/filters/quarto-pre/shortcodes-handlers.lua

@@ -115,21 +115,73 @@ function initShortcodeHandlers()
     return { pandoc.RawInline('quarto-internal', quarto.json.encode(data)) }
   end
 
-  local function handle_brand(args)
+  local function handle_brand(args, _kwargs, _meta, _raw_args, context)
     local brand = require("modules/brand/brand")
     local brandCommand = read_arg(args, 1)
-    if brandCommand ~= "color" then 
+
+    local warn_bad_brand_command = function()
       warn("Unknown brand command " .. brandCommand .. " specified in a brand shortcode.")
-      return { pandoc.Strong({pandoc.Str("?brand:" .. brandCommand)}) } 
+      if context == "block" then
+        return pandoc.Blocks { pandoc.Strong({pandoc.Str("?brand:" .. table.concat(args, " "))}) }
+      elseif context == "inline" then
+        return pandoc.Inlines { pandoc.Strong({pandoc.Str("?brand:" .. table.concat(args, " "))}) }
+      elseif context == "text" then
+        return "?brand:" .. table.concat(args, " ")
+      else
+        warn("Unknown context for brand shortcode error: " .. context)
+        return { }
+      end
     end
-    local brandName = read_arg(args, 2)
-    local brandValue = brand.get_color(brandName)
-    if brandValue ~= nil then
-      return { pandoc.Str(brandValue) }
-    else 
-      warn("Unknown brand " .. brandName .. " specified in a brand shortcode.")
-      return { pandoc.Strong({pandoc.Str("?brand:" .. brandName)}) } 
+
+    if brandCommand == "color" then 
+      local color_name = read_arg(args, 2)
+      local color_value = brand.get_color(color_name)
+      if color_value == nil then
+        return warn_bad_brand_command()
+      else
+        return pandoc.Inlines { pandoc.Str(color_value) }
+      end
     end
+
+    if brandCommand == "logo" then
+      local logo_name = read_arg(args, 2)
+      local logo_value = brand.get_logo(logo_name)
+      local entry = { path = nil }
+
+      if type(logo_value) ~= "table" then
+        warn("unexpected logo value entry: " .. type(logo_value))
+        return warn_bad_brand_command()
+      end
+
+      quarto.utils.dump(logo_value)
+
+      -- does this have light/dark variants?
+      -- TODO handle light-dark theme switching
+      if logo_value.light then
+        entry = logo_value.light
+      else
+        entry = logo_value
+      end
+
+      if type(entry.path) ~= "string" then
+        warn("unexpected type in logo light entry: " .. type(entry.path))
+        return warn_bad_brand_command()
+      end
+
+      -- TODO fix alt text handling
+      if context == "block" then
+        return pandoc.Blocks { pandoc.Image(pandoc.Inlines {}, entry.path) }
+      elseif context == "inline" then
+        return pandoc.Inlines { pandoc.Image(pandoc.Inlines {}, entry.path) }
+      elseif context == "text" then
+        return entry.path
+      else
+        warn("unexpected context for logo shortcode: " .. context)
+        return warn_bad_brand_command()
+      end
+    end
+
+    return warn_bad_brand_command()
   end
 
   -- built in handlers (these override any user handlers)