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_extensions/shafayetShafee/metropolis-beamer/metropolis-header.lua

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+--[[
+MIT License
+
+Copyright (c) 2024 Shafayet Khan Shafee
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+]]--
+
+local str = pandoc.utils.stringify
+
+local function ensureHtmlDeps()
+  quarto.doc.add_html_dependency({
+    name = "metropolis-beamer",
+    version = "1.0.0",
+    scripts = {
+        { 
+          path = "resources/js/add_header.js", 
+          attribs = {defer = "true"},
+          afterBody = true
+        }
+      }
+  })
+end
+
+if quarto.doc.is_format('revealjs') then
+  -- Ensuring the dependencies got loaded before proceeding
+  ensureHtmlDeps()
+  
+  function Span(el)
+      local style = el.attributes["style"] or ""
+      local color = el.attributes['color']
+      local bg_color = el.attributes['bg']
+    
+      if color then
+        local fcolor = "color: " .. color .. ";"
+        el.attributes['color'] = nil
+        style = style .. ";" .. fcolor 
+    end
+    if bg_color then
+        local bcolor = "background-color: " .. bg_color .. ";"
+        el.attributes['bg-color'] = nil
+        style = style .. ";" .. bcolor 
+    end
+    
+    el.attributes['style'] = style
+    return el
+  end
+    
+  function Pandoc(doc)
+    local blocks = doc.blocks
+    local str = pandoc.utils.stringify
+    local meta = doc.meta
+    -- make divs structure for holding text and logo.
+    local header_logo = meta['header-logo'] and str(meta['header-logo']) or ""
+    local header_logo_link = meta['header-logo-link'] and str(meta['header-logo-link']) or ""
+    local header_img = pandoc.Div(pandoc.Image("", header_logo, ""), {class = "header-logo"})
+    
+    if header_logo_link ~= "" then
+      header_img.attributes['header-logo-link'] = header_logo_link
+    end
+    
+    local header_title = pandoc.Div({pandoc.Para(' ')} ,{class = "header-title"})
+
+    local div = pandoc.Div(
+      {
+        header_title,
+        header_img
+      }, 
+      {class = 'reveal-header'})
+    table.insert(blocks, div)
+    return doc
+  end
+end