feat: set up migration to quarto

vega-lite.lua

@@ -0,0 +1,75 @@
+-- vega-lite.lua
+-- A Quarto filter to render vega-lite code blocks using vega-embed
+
+local vegaEmbedIncluded = false
+
+function ensureVegaEmbed()
+  if not vegaEmbedIncluded then
+    vegaEmbedIncluded = true
+    quarto.doc.include_text("in-header", [[
+<script src="https://cdn.jsdelivr.net/npm/vega@5"></script>
+<script src="https://cdn.jsdelivr.net/npm/vega-lite@5"></script>
+<script src="https://cdn.jsdelivr.net/npm/vega-embed@6"></script>
+]])
+  end
+end
+
+local counter = 0
+
+function CodeBlock(block)
+  if block.classes:includes('vega-lite') then
+    ensureVegaEmbed()
+
+    counter = counter + 1
+    local divId = 'vega-viz-' .. counter
+
+    -- Get the spec as a string
+    local spec = block.text
+
+    -- Parse options from attributes
+    local echo = block.attributes['echo']
+    local codeFold = block.attributes['code-fold']
+
+    -- Default to showing code
+    if echo == nil then echo = "true" end
+
+    local result = {}
+
+    -- Handle code display
+    if echo ~= "false" then
+      local codeBlock = pandoc.CodeBlock(spec, {class = "json"})
+
+      if codeFold == "true" or codeFold == "show" then
+        -- Wrap in collapsible details/summary
+        local openAttr = ""
+        if codeFold == "show" then
+          openAttr = " open"
+        end
+
+        local foldedCode = pandoc.RawBlock('html', string.format([[
+<details%s>
+<summary>Click to expand code</summary>
+]], openAttr))
+
+        table.insert(result, foldedCode)
+        table.insert(result, codeBlock)
+        table.insert(result, pandoc.RawBlock('html', '</details>'))
+      else
+        -- Show code normally
+        table.insert(result, codeBlock)
+      end
+    end
+
+    -- Create the HTML output for the visualization
+    local html = string.format([[
+<div id="%s"></div>
+<script type="text/javascript">
+  vegaEmbed('#%s', %s, {"actions": true});
+</script>
+]], divId, divId, spec)
+
+    table.insert(result, pandoc.RawBlock('html', html))
+
+    return result
+  end
+end