unable to cross ref for quarto bug V_1

.gitignore

@@ -1,7 +1,7 @@
 _book/
 .quarto/
 .vscode/
-_extensions/
+# _extensions/
 /.quarto/
 _.site/
 

_extensions/dialoa/first-line-indent/_extension.yml

@@ -0,0 +1,6 @@
+name: first-line-indent
+author: Julien Dutant
+version: 1.0.0
+contributes:
+  filters:
+    - first-line-indent.lua

_extensions/dialoa/first-line-indent/first-line-indent.lua

@@ -0,0 +1,595 @@
+--[[# first-line-indent.lua – First line indentation filter
+
+Copyright: © 2021–2023 Contributors
+License: MIT – see LICENSE for details
+
+@TODO latex_quote should use options.size (or better, a specific option)
+@TODO option for leaving indents after headings (French style)
+@TODO smart setting of the post-heading style based on `lang`
+@TODO option to leave indent at the beginning of the document
+
+]]
+
+PANDOC_VERSION:must_be_at_least '2.17'
+stringify = pandoc.utils.stringify
+equals = pandoc.utils.equals
+pandoctype = pandoc.utils.type
+
+-- # Options
+
+---@class Options Options map with default values.
+---@field format string|nil output format (currently: 'html' or 'latex')
+---@field indent boolean whether to use first line indentation globally
+---@field set_metadata_variable boolean whether to set the `indent`
+--    metadata variable.
+---@field set_header_includes boolean whether to provide formatting code in
+--    header-includes.
+---@field auto_remove_indents boolean whether to automatically remove
+--    indents after specific block types.
+---@field remove_after table list of strings, Pandoc AST block types
+--    after which first-line indents should be automatically removed.
+---@field remove_after_class table list of strings, classes of elements
+--    after which first-line indents should be automatically removed.
+---@field dont_remove_after_class table list of strings, classes of elements
+--    after which first-line indents should not be removed. Prevails
+--    over remove_after.
+---@field size string|nil a CSS / LaTeX specification of the first line
+--    indent length
+---@field recursive table<string, options> Pandoc Block types to
+---     which the filter is recursively applied, with options map.
+---     The option `dont_indent_first` controls whether indentation
+---     is removed on the first paragraph.
+local Options = {
+  format = nil,
+  indent = true,
+  set_metadata_variable = true,
+  set_header_includes = true,
+  auto_remove = true,
+  remove_after = pandoc.List({
+    'BlockQuote',
+    'BulletList',
+    'CodeBlock',
+    'DefinitionList',
+    'HorizontalRule',
+    'OrderedList',
+  }),
+  remove_after_class = pandoc.List({
+    'statement',
+  }),
+  dont_remove_after_class = pandoc.List:new(),
+  size = nil, -- default let LaTeX decide
+  size_default = '1.5em', -- default value for HTML
+  recursive = {
+    Div = {dont_indent_first = false},
+    BlockQuote = {dont_indent_first = true},
+  }
+}
+
+-- # Filter global variables
+
+---@class code map pandoc objects for indent/noindent Raw code.
+local code = {
+  tex = {
+    indent = pandoc.RawInline('tex', '\\indent '),
+    noindent = pandoc.RawInline('tex', '\\noindent '),
+  },
+  latex = {
+    indent = pandoc.RawInline('latex', '\\indent '),
+    noindent = pandoc.RawInline('latex', '\\noindent '),
+  },
+  html = {
+    indent = pandoc.RawBlock('html',
+      '<div class="first-line-indent-after"></div>'),
+    noindent = pandoc.RawBlock('html',
+      '<div class="no-first-line-indent-after"></div>'),
+  }
+}
+
+
+---LATEX_QUOTE_ENV: LaTeX's definition of the quote environement
+---used to define HeaderIncludes.
+---a \setlength{\parindent}{<size>} will be appended
+---@type string
+local LATEX_QUOTE_ENV = [[\makeatletter
+  \renewenvironment{quote}
+     {\list{}{\listparindent 1.5em%
+              \itemindent \listparindent
+              \rightmargin \leftmargin
+              \parsep \z@ \@plus \p@}%
+            \item\noindent\relax}
+      {\endlist}
+  \makeatother
+]]
+
+---@class HeaderIncludes map of functions to produce
+---header-includes code given a size parameter (string|nil),
+--- either for global or for local indentation markup.
+--- optionally wrap the constructed global header markup (e.g. <style> tags).
+--- glob = {html : function, latex: function}
+--- wrap = {html : function, latex: function}
+--- loc = {html : function, latex: function}
+HeaderIncludes = {
+  glob = {
+    html = function(size)
+      size = size or Options.size_default
+      local code = [[  p {
+    text-indent: SIZE;
+
+    -- Javed
+    -- here you can define th margin to be zero or do not touch it
+    -- margin: 0;
+  }
+  header p {
+    text-indent: 0;
+    margin: 1em 0;
+  }
+  :is(h1, h2, h3, h4, h5, h6) + p {
+    text-indent: 0;
+  }
+  li > p, li > div p {
+    text-indent: 0;
+    margin-bottom: 1rem;
+  }
+]]
+      return code:gsub("SIZE", size)
+    end,
+    latex = function(size)
+      local size_code = size and '\\setlength{\\parindent}{'..size..'}\n'
+                        or ''
+      return LATEX_QUOTE_ENV .. size_code
+    end,
+  },
+  wrap = {
+    html = function(header_str)
+      return "<style>\n/* first-line indent styles */\n" .. header_str
+        .. "/* end of first-line indent styles */\n</style>"
+    end,
+    latex = function(str) return str end,
+  },
+  loc = {
+    html = function(size)
+      size = size or Options.size_default
+      local code = [[  div.no-first-line-indent-after + p {
+    text-indent: 0;
+  }
+  div.first-line-indent-after + p {
+    text-indent: SIZE;
+  }
+]]
+      return code:gsub("SIZE", size)
+    end,
+    latex = function(_) return '' end,
+  }
+}
+
+-- # encapsulate Quarto/Pandoc variants
+
+---format_match: whether format matches a string pattern
+---ex: format_match('html5'), format_match('html*')
+---in Quarto we try removing non-alphabetical chars
+---@param pattern string
+---@return boolean
+local function format_match(pattern)
+  return quarto and (quarto.doc.is_format(pattern)
+      or quarto.doc.is_format(pattern:gsub('%A',''))
+    )
+    or FORMAT:match(pattern)
+end
+
+---add_header_includes: add a block to the document's header-includes
+---meta-data field.
+---@param meta pandoc.Meta the document's metadata block
+---@param blocks pandoc.Blocks list of Pandoc block elements (e.g. RawBlock or Para)
+---   to be added to the header-includes of meta
+---@return pandoc.Meta meta the modified metadata block
+local function add_header_includes(meta, blocks)
+
+  -- Pandoc
+  local function pandoc_add_headinc(meta,blocks)
+
+    local header_includes = pandoc.MetaList( { pandoc.MetaBlocks(blocks) })
+
+    -- add any exisiting meta['header-includes']
+    -- it can be MetaInlines, MetaBlocks or MetaList
+    if meta['header-includes'] then
+      if pandoctype(meta['header-includes']) == 'List' then
+        header_includes:extend(meta['header-includes'])
+      else
+        header_includes:insert(meta['header-includes'])
+      end
+    end
+
+    meta['header-includes'] = header_includes
+
+    return meta
+
+  end
+
+  -- Quarto
+  local function quarto_add_headinc(blocks)
+    quarto.doc.include_text('in-header', stringify(blocks))
+  end
+
+  return quarto and quarto_add_headinc(blocks)
+    or pandoc_add_headinc(meta,blocks)
+
+end
+
+
+-- # Helper functions
+
+-- ensure_list: turns Inlines and Blocks meta values into list
+local function ensure_list(elem)
+  if elem and (pandoctype(elem) == 'Inlines'
+    or pandoctype(elem) == 'Blocks')  then
+    elem = pandoc.List:new(elem)
+  end
+  return elem
+end
+
+
+--- classes_include: check if one of an element's class is in a given
+-- list. Returns true if match, nil if no match or the element doesn't
+-- have classes.
+---@param elem table pandoc AST element
+---@param classes table pandoc List of strings
+local function classes_include(elem,classes)
+
+  if elem.classes then
+
+    for _,class in ipairs(classes) do
+      if elem.classes:includes(class) then return true end
+    end
+
+  end
+
+end
+
+--- is_indent_cmd: check if an element is a LaTeX indent command
+---@param elem pandoc.Inline
+---@return string|nil 'indent', 'noindent' or nil
+-- local function is_indent_cmd(elem)
+--   return (equals(elem, code.latex.indent)
+--     or equals(elem, code.tex.indent)) and 'indent'
+--     or (equals(elem, code.latex.noindent)
+--     or equals(elem, code.tex.noindent)) and 'noindent'
+--     or nil
+-- end
+local function is_indent_cmd(elem)
+  return elem.text and (
+      elem.text:match('^%s*\\indent%s*$') and 'indent'
+      or elem.text:match('^%s*\\noindent%s*$') and 'noindent'
+    )
+    or nil
+end
+
+-- # Filter functions
+
+--- Add format-specific explicit indent markup to a paragraph.
+--- Returns a list of blocks containing a single paragraph
+--- or a rawblock followed by a paragraph, depending on format.
+---@param type string 'indent' or 'noindent', type of markup to add
+---@param elem pandoc.Para
+---@return pandoc.Blocks
+local function indent_markup(type, elem)
+  local result = pandoc.List:new()
+
+  if not (type == 'indent' or type == 'noindent') then
+
+    result:insert(elem)
+
+  elseif format_match('latex') then
+
+    -- in LaTeX, replace any `\indent` or `\noindent`
+    -- at the beginning of the paragraph with
+    -- with the one corresponding to `type`
+
+    if elem.content[1] and is_indent_cmd(elem.content[1]) then
+      elem.content[1] = code.tex[type]
+    else
+      elem.content:insert(1, code.tex[type])
+    end
+    result:insert(elem)
+
+
+  elseif format_match('html') then
+
+    result:extend({ code.html[type], elem })
+
+  end
+
+  return result
+
+end
+
+--- process_blocks: process indentations in a list of blocks.
+-- Adds output code for explicitly specified first-line indents,
+-- automatically removes first-line indents after blocks of the
+-- designed types unless otherwise specified.
+---@param blocks pandoc.Blocks element (list of blocks)
+---@param dont_indent_first boolean whether to indent the first paragraph
+local function process_blocks(blocks, dont_indent_first)
+  dont_indent_first = dont_indent_first or false
+  -- tag for the first element
+  local is_first_block = true -- tags the doc's first element
+  -- tag to trigger indentation auto-removal on the next element
+  local dont_indent_next_block = false
+  local result = pandoc.List:new()
+
+  for _,elem in pairs(blocks) do
+
+    -- Paragraphs: if they have explicit LaTeX indent markup
+    -- reproduce it in the output format, otherwise
+    -- remove indentation if needed, provided `auto_remove` is on.
+    if elem.t == "Para" then
+
+      if elem.content[1] and is_indent_cmd(elem.content[1]) then
+
+        -- 'indent' or 'noindent' ?
+        local type = is_indent_cmd(elem.content[1])
+
+        result:extend(indent_markup(type, elem))
+
+      elseif is_first_block and dont_indent_first then
+
+          result:extend(indent_markup('noindent', elem))
+
+      elseif dont_indent_next_block and Options.auto_remove then
+
+        result:extend(indent_markup('noindent', elem))
+
+      else
+
+        result:insert(elem)
+
+      end
+
+      dont_indent_next_block = false
+
+    -- Non-Paragraphs: check first whether it's an element after
+    -- which indentation must be removed. Next insert it, applying
+    -- this function recursively within the element if needed.
+    else
+
+      if Options.auto_remove then
+
+        if Options.remove_after:includes(elem.t) and
+            not classes_include(elem, Options.dont_remove_after_class) then
+
+          dont_indent_next_block = true
+
+        elseif elem.classes and
+            classes_include(elem, Options.remove_after_class) then
+
+          dont_indent_next_block = true
+
+        else
+
+          dont_indent_next_block = false
+
+        end
+
+      end
+
+      -- recursively process the element if needed
+      if Options.recursive[elem.t] then
+
+        local dif = Options.recursive[elem.t].dont_indent_first
+        elem.content = process_blocks(elem.content, dif)
+
+      end
+
+      -- insert
+      result:insert(elem)
+
+    end
+
+    -- ensure `is_first_block` turns to false
+    -- even if the first block wasn't a paragraph
+    -- or if it had explicit indent marking
+    is_first_block = false
+
+  end
+
+  return result
+
+end
+
+--- process_doc: Process indents in the document's body text.
+-- Adds output code for explicitly specified first-line indents,
+-- automatically removes first-line indents after blocks of the
+-- designed types unless otherwise specified.
+local function process_doc(doc)
+  local dont_indent_first = false
+
+  -- if no output format, do nothing
+  if not Options.format then return end
+
+  -- if the doc has a title, do not indent first paragraph
+  if doc.meta.title then
+    dont_indent_first = true
+  end
+
+  doc.blocks = process_blocks(doc.blocks, dont_indent_first)
+
+  return doc
+
+end
+
+
+--- read_user_options: read user options from meta element.
+-- in Quarto options may be under format/pdf or format/html
+-- the latter override root ones.
+local function read_user_options(meta)
+  local user_options = {}
+
+  if meta.indent == false then
+    Options.indent = false
+  end
+
+  if meta['first-line-indent'] then
+    user_options = meta['first-line-indent']
+  end
+
+  local formats = {'pdf', 'html', 'latex'}
+  if meta.format then
+    for format in ipairs(formats) do
+      if format_match(format) and meta.format[format] then
+        for k,v in meta.format[format] do
+          user_options[k] = v
+        end
+      end
+    end
+  end
+
+  if user_options['set-metadata-variable'] == false then
+    Options.set_metadata_variable = false
+  end
+
+  if user_options['set-header-includes'] == false then
+    Options.set_header_includes = false
+  end
+
+  -- size
+  -- @todo using stringify means that LaTeX commands in
+  -- size are erased. But it ensures that the filter gets
+  -- a string. Improvement: check that we have a string
+  -- and throw a warning otherwise
+  if user_options.size and pandoctype(user_options.size == 'Inlines') then
+
+    Options.size = stringify(user_options.size)
+
+  end
+
+  if user_options['auto-remove'] == false then
+    Options.auto_remove = false
+  end
+
+  -- autoremove elements and classes
+  -- for elements we only need a whitelist, remove_after
+  -- for classes we need both a whitelist (remove_after_class)
+  -- and a blacklist (dont_remove_after_class).
+
+  -- first insert user values in `remove_after`, `remove_after_class`
+  -- and `dont_remove_after_class`.
+  for optname, metakey in pairs({
+    remove_after = 'remove-after',
+    remove_after_class = 'remove-after-class',
+    dont_remove_after_class = 'dont-remove-after-class',
+  }) do
+
+    local user_value = ensure_list(user_options[metakey])
+
+    if user_value and pandoctype(user_value) == 'List' then
+
+        for _,item in ipairs(user_value) do
+
+          Options[optname]:insert(stringify(item))
+
+        end
+
+    end
+
+  end
+
+  -- then remove blacklisted entries from `remove_after`
+  -- and `remove_after_class`.
+  for optname, metakey in pairs({
+    remove_after = 'dont-remove-after',
+    remove_after_class = 'dont-remove-after-class'
+  }) do
+
+    local user_value = ensure_list(user_options[metakey])
+
+    if user_value and pandoctype(user_value) == 'List' then
+
+      -- stringify the list
+      for i,v in ipairs(user_value) do
+        user_value[i] = stringify(v)
+      end
+
+      -- filter to that returns true iff an item isn't blacklisted
+      local predicate = function (str)
+        return not(user_value:includes(str))
+      end
+
+      -- apply the filter to the whitelist
+      Options[optname] = Options[optname]:filter(predicate)
+
+    end
+
+  end
+
+end
+
+--- set_meta: insert options in doc's meta
+--- Sets `indent` and extends `header-includes` if needed.
+---@param meta pandoc.Meta
+---@return pandoc.Meta|nil meta nil if no changes
+local function set_meta(meta)
+  local changes = false -- only return if changes are made
+  local header_code = nil
+  local format = Options.format
+
+  -- set the `indent` metadata variable unless otherwise specified or
+  -- already set to false
+  if Options.set_metadata_variable and not(meta.indent == false) then
+    meta.indent = true
+    changes = true
+  end
+
+  -- set the `header-includes` metadata variable
+  if Options.set_header_includes and Options.indent then
+
+    -- do we apply first line indentation globally?
+    if Options.indent then
+      header_code = HeaderIncludes.glob[format](Options.size)
+    end
+    -- provide local explicit indentation styles
+    header_code = header_code .. HeaderIncludes.loc[format](Options.size)
+    -- wrap the header if needed
+    header_code = HeaderIncludes.wrap[format](header_code)
+    
+    -- insert if not empty
+    if header_code ~= '' then
+      add_header_includes(meta, { pandoc.RawBlock(format, header_code)})
+      changes = true
+    end
+
+  end
+
+  return changes and meta or nil
+
+end
+
+--- process_metadata: process user options.
+-- read user options, set the `indent` metadata variable,
+-- add formatting code to `header-includes`.
+local function process_metadata(meta)
+  local changes = false -- only return if changes are made
+  local header_code = nil
+  local format = format_match('html') and 'html'
+                or (format_match('latex') and 'latex')
+
+  if not format then
+    return nil
+  else
+    Options.format = format
+  end
+
+  read_user_options(meta) -- places values in global `options`
+
+  return set_meta(meta)
+
+end
+
+--- Main code
+-- Returns the filters in the desired order of execution
+return {
+  {
+    Meta = process_metadata
+  },
+  {
+    Pandoc = process_doc
+  }
+}

_extensions/quarto-ext/lightbox/_extension.yml

@@ -0,0 +1,7 @@
+title: Lightbox
+author: RStudio, PBC
+version: 0.1.6
+quarto-required: ">=1.2.198"
+contributes:
+  filters:
+    - lightbox.lua

_extensions/quarto-ext/lightbox/lightbox.css

@@ -0,0 +1,9 @@
+
+
+
+div.gslide div.gslide-description,
+div.gslide-description .gslide-title,
+div.gslide-description .gslide-desc {
+    color: var(--quarto-body-color);
+    background-color: var(--quarto-body-bg);
+}

_extensions/quarto-ext/lightbox/lightbox.lua

@@ -0,0 +1,251 @@
+-- whether we're automatically lightboxing
+local auto = false
+
+-- whether we need lightbox dependencies added
+local needsLightbox = false
+
+-- a counter used to ensure each image is in its own gallery
+local imgCount = 0
+
+-- attributes to forward from the image to the newly created link
+local kDescription = "description"
+local kForwardedAttr = {
+  "title", kDescription, "desc-position", 
+  "type", "effect", "zoomable", "draggable"
+}
+
+local kLightboxClass = "lightbox"
+local kNoLightboxClass = "nolightbox"
+local kGalleryPrefix = "quarto-lightbox-gallery-"
+
+-- A list of images already within links that we can use to filter
+local imagesWithinLinks = pandoc.List({})
+
+local function readAttrValue(el, attrName) 
+  if attrName == kDescription then
+    local doc = pandoc.read(el.attr.attributes[attrName])
+    local attrInlines = doc.blocks[1].content
+    return pandoc.write(pandoc.Pandoc(attrInlines), "html")
+  else 
+    return el[attrName]
+  end
+
+end
+
+return {
+  {
+    Meta = function(meta) 
+
+      -- If the mode is auto, we need go ahead and 
+      -- run if there are any images (ideally we would)
+      -- filter to images in the body, but that can be
+      -- left for future me to deal with 
+      -- supports:
+      -- lightbox: auto
+      -- or
+      -- lightbox:
+      --   match: auto
+      local lbMeta = meta.lightbox
+      if lbMeta ~= nil and type(lbMeta) == 'table' then
+        if lbMeta[1] ~= nil then
+          if lbMeta[1].text == "auto" then
+            auto = true
+          end
+        elseif lbMeta.match ~= nil and pandoc.utils.stringify(lbMeta.match) == 'auto' then
+          auto = true
+        elseif lbMeta == true then
+          auto = true      
+        end
+      end
+    end, 
+    -- Find images that are already within links
+    -- we'll use this to filter out these images if
+    -- the most is auto
+    Link = function(linkEl)
+      pandoc.walk_inline(linkEl, {
+        Image = function(imageEl) 
+          imagesWithinLinks[#imagesWithinLinks + 1] = imageEl
+        end
+      })
+    end
+  },{
+    Div = function(div)
+      if div.classes:includes("cell") and div.attributes["lightbox"] ~= nil then
+        meta = quarto.json.decode(div.attributes["lightbox"])
+        local imgCount=0
+        div = div:walk({
+          Image = function(imgEl)
+            imgCount = imgCount + 1
+            if (type(meta) == "table" and meta[kNoLightboxClass] == true) or meta == false then
+              imgEl.classes:insert(kNoLightboxClass)
+            else
+              if not auto and ((type(meta) == "table" and not meta[kNoLightboxClass]) or meta == true) then
+                imgEl.classes:insert(kLightboxClass)
+              end
+              if (type(meta) == "table") then
+                if meta.group then
+                  imgEl.attr.attributes.group = meta.group or imgEl.attr.attributes.group
+                end
+                for _, v in next, kForwardedAttr do
+                  if type(meta[v]) == "table" and #meta[v] > 1 then 
+                    -- if list attributes it should be one per plot
+                    if imgCount > #meta[v] then
+                      quarto.log.warning("More plots than '" .. v .. "' passed in YAML chunk options.")
+                    else
+                      attrLb = meta[v][imgCount]
+                    end
+                  else 
+                    -- Otherwise reuse the single attributes
+                    attrLb = meta[v]
+                  end
+                  imgEl.attr.attributes[v] = attrLb or imgEl.attr.attributes[v]
+                end
+              end
+            end
+            return imgEl
+          end
+        })
+        div.attributes["lightbox"] = nil
+      end
+      return div
+    end
+  },
+  {
+  Image = function(imgEl)
+    if quarto.doc.is_format("html:js") then
+      local isAlreadyLinked = imagesWithinLinks:includes(imgEl)
+      if (not isAlreadyLinked and auto and not imgEl.classes:includes(kNoLightboxClass)) 
+          or imgEl.classes:includes('lightbox') then
+        -- note that we need to include the dependency for lightbox
+        needsLightbox = true
+        imgCount = imgCount + 1
+
+        -- remove the class from the image
+        imgEl.attr.classes = imgEl.attr.classes:filter(function(clz) 
+          return clz ~= kLightboxClass
+        end)
+        
+        -- attributes for the link
+        local linkAttributes = {}
+
+        -- mark this image as a lightbox target
+        linkAttributes.class = kLightboxClass
+
+        -- get the alt text from image and use that as title
+        local title = nil
+        if imgEl.caption ~= nil and #imgEl.caption > 0 then
+          linkAttributes.title = pandoc.utils.stringify(imgEl.caption)
+        elseif imgEl.attributes['fig-alt'] ~= nil and #imgEl.attributes['fig-alt'] > 0 then
+          linkAttributes.title = pandoc.utils.stringify(imgEl.attributes['fig-alt'])
+        end
+
+        -- move a group attribute to the link, if present
+        if imgEl.attr.attributes.group ~= nil then
+          linkAttributes.gallery = imgEl.attr.attributes.group
+          imgEl.attr.attributes.group = nil
+        else 
+          linkAttributes.gallery = kGalleryPrefix .. imgCount
+        end
+
+        -- forward any other known attributes
+        for i, v in ipairs(kForwardedAttr) do
+          if imgEl.attr.attributes[v] ~= nil then
+            -- forward the attribute
+            linkAttributes[v] = readAttrValue(imgEl, v)
+          
+            -- clear the attribute
+            imgEl.attr.attributes[v] = nil
+          end
+
+          -- clear the title
+          if (imgEl.title == 'fig:') then
+            imgEl.title = ""
+          end
+
+        end
+
+        -- wrap decorated images in a link with appropriate attrs
+        local link = pandoc.Link({imgEl}, imgEl.src, nil, linkAttributes)
+        return link
+      end
+    end 
+  end,
+  Meta = function(meta)
+    -- If we discovered lightbox-able images
+    -- we need to include the dependencies
+    if needsLightbox then
+      -- add the dependency
+      quarto.doc.add_html_dependency({
+        name = 'glightbox',
+        scripts = {'resources/js/glightbox.min.js'},
+        stylesheets = {'resources/css/glightbox.min.css', 'lightbox.css'}
+      })
+
+      -- read lightbox options
+      local lbMeta = meta.lightbox
+      local lbOptions = {}
+      local readEffect = function(el) 
+        local val = pandoc.utils.stringify(el)
+        if val == "fade" or val == "zoom" or val == "none" then
+          return val
+        else
+          error("Invalid effect " + val)
+        end
+      end
+
+      -- permitted options include:
+      -- lightbox:
+      --   effect: zoom | fade | none
+      --   desc-position: top | bottom | left |right
+      --   loop: true | false
+      --   class: <class-name>
+      local effect = "zoom"
+      local descPosition = "bottom" 
+      local loop = true
+      local skin = nil
+      
+      -- The selector controls which elements are targeted.
+      -- currently, it always targets .lightbox elements
+      -- and there is no way for the user to change this
+      local selector = "." .. kLightboxClass
+
+      if lbMeta ~= nil and type(lbMeta) == 'table' then
+        if lbMeta.effect ~= nil then
+          effect = readEffect(lbMeta.effect)
+        end
+
+        if lbMeta['desc-position'] ~= nil then
+          descPosition = pandoc.utils.stringify(lbMeta['desc-position'])
+        end  
+
+        if lbMeta['css-class'] ~= nil then
+          skin = pandoc.utils.stringify(lbMeta['css-class'])
+        end
+        
+        if lbMeta.loop ~= nil then
+          loop = lbMeta.loop
+        end
+      end
+
+      -- Generate the options to configure lightbox
+      local options = {
+        selector = selector,
+        closeEffect = effect,
+        openEffect = effect, 
+        descPosition = descPosition,
+        loop = loop,
+      }
+      if skin ~= nil then
+        options.skin = skin
+      end
+      local optionsJson = quarto.json.encode(options)
+
+      -- generate the initialization script with the correct options
+      local scriptTag = "<script>var lightboxQuarto = GLightbox(" .. optionsJson .. ");</script>"
+
+      -- inject the rendering code
+      quarto.doc.include_text("after-body", scriptTag)
+
+    end
+  end
+}}

_extensions/quarto-ext/lightbox/resources/css/glightbox.min.css

@@ -0,0 +1 @@
+.glightbox-container{width:100%;height:100%;position:fixed;top:0;left:0;z-index:999999!important;overflow:hidden;-ms-touch-action:none;touch-action:none;-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;-ms-text-size-adjust:100%;text-size-adjust:100%;-webkit-backface-visibility:hidden;backface-visibility:hidden;outline:0}.glightbox-container.inactive{display:none}.glightbox-container .gcontainer{position:relative;width:100%;height:100%;z-index:9999;overflow:hidden}.glightbox-container .gslider{-webkit-transition:-webkit-transform .4s ease;transition:-webkit-transform .4s ease;transition:transform .4s ease;transition:transform .4s ease,-webkit-transform .4s 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.ginner-container{position:relative;width:100%;display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center;-webkit-box-orient:vertical;-webkit-box-direction:normal;-ms-flex-direction:column;flex-direction:column;max-width:100%;margin:auto;height:100vh}.glightbox-container .ginner-container.gvideo-container{width:100%}.glightbox-container .ginner-container.desc-bottom,.glightbox-container .ginner-container.desc-top{-webkit-box-orient:vertical;-webkit-box-direction:normal;-ms-flex-direction:column;flex-direction:column}.glightbox-container .ginner-container.desc-left,.glightbox-container .ginner-container.desc-right{max-width:100%!important}.gslide iframe,.gslide video{outline:0!important;border:none;min-height:165px;-webkit-overflow-scrolling:touch;-ms-touch-action:auto;touch-action:auto}.gslide:not(.current){pointer-events:none}.gslide-image{-webkit-box-align:center;-ms-flex-align:center;align-items:center}.gslide-image img{max-height:100vh;display:block;padding:0;float:none;outline:0;border:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;max-width:100vw;width:auto;height:auto;-o-object-fit:cover;object-fit:cover;-ms-touch-action:none;touch-action:none;margin:auto;min-width:200px}.desc-bottom .gslide-image img,.desc-top .gslide-image img{width:auto}.desc-left .gslide-image img,.desc-right .gslide-image img{width:auto;max-width:100%}.gslide-image img.zoomable{position:relative}.gslide-image img.dragging{cursor:-webkit-grabbing!important;cursor:grabbing!important;-webkit-transition:none;transition:none}.gslide-video{position:relative;max-width:100vh;width:100%!important}.gslide-video .plyr__poster-enabled.plyr--loading .plyr__poster{display:none}.gslide-video .gvideo-wrapper{width:100%;margin:auto}.gslide-video::before{content:'';position:absolute;width:100%;height:100%;background:rgba(255,0,0,.34);display:none}.gslide-video.playing::before{display:none}.gslide-video.fullscreen{max-width:100%!important;min-width:100%;height:75vh}.gslide-video.fullscreen video{max-width:100%!important;width:100%!important}.gslide-inline{background:#fff;text-align:left;max-height:calc(100vh - 40px);overflow:auto;max-width:100%;margin:auto}.gslide-inline .ginlined-content{padding:20px;width:100%}.gslide-inline .dragging{cursor:-webkit-grabbing!important;cursor:grabbing!important;-webkit-transition:none;transition:none}.ginlined-content{overflow:auto;display:block!important;opacity:1}.gslide-external{display:-webkit-box;display:-ms-flexbox;display:flex;width:100%;min-width:100%;background:#fff;padding:0;overflow:auto;max-height:75vh;height:100%}.gslide-media{display:-webkit-box;display:-ms-flexbox;display:flex;width:auto}.zoomed 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ease;transition:opacity .5s ease;opacity:1}.greset{-webkit-transition:all .3s ease;transition:all .3s ease}.gabsolute{position:absolute}.grelative{position:relative}.glightbox-desc{display:none!important}.glightbox-open{overflow:hidden}.gloader{height:25px;width:25px;-webkit-animation:lightboxLoader .8s infinite linear;animation:lightboxLoader .8s infinite linear;border:2px solid #fff;border-right-color:transparent;border-radius:50%;position:absolute;display:block;z-index:9999;left:0;right:0;margin:0 auto;top:47%}.goverlay{width:100%;height:calc(100vh + 1px);position:fixed;top:-1px;left:0;background:#000;will-change:opacity}.glightbox-mobile 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_extensions/quarto-ext/lightbox/resources/js/glightbox.min.js

@@ -0,0 +1 @@
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t=this;e.preventDefault(),this.initialX=this.currentX,this.initialY=this.currentY,this.active=!1,setTimeout((function(){t.dragging=!1,t.img.isDragging=!1,t.img.classList.remove("dragging")}),100)}},{key:"drag",value:function(e){this.active&&(e.preventDefault(),"touchmove"===e.type?(this.currentX=e.touches[0].clientX-this.initialX,this.currentY=e.touches[0].clientY-this.initialY):(this.currentX=e.clientX-this.initialX,this.currentY=e.clientY-this.initialY),this.xOffset=this.currentX,this.yOffset=this.currentY,this.img.isDragging=!0,this.dragging=!0,this.setTranslate(this.img,this.currentX,this.currentY))}},{key:"onMove",value:function(e){if(this.zoomedIn){var t=e.clientX-this.img.naturalWidth/2,i=e.clientY-this.img.naturalHeight/2;this.setTranslate(this.img,t,i)}}},{key:"setTranslate",value:function(e,t,i){e.style.transform="translate3d("+t+"px, "+i+"px, 0)"}},{key:"widowWidth",value:function(){return 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n(e,[{key:"dragStart",value:function(e){if(this.slide.classList.contains("zoomed"))this.active=!1;else{"touchstart"===e.type?(this.initialX=e.touches[0].clientX-this.xOffset,this.initialY=e.touches[0].clientY-this.yOffset):(this.initialX=e.clientX-this.xOffset,this.initialY=e.clientY-this.yOffset);var t=e.target.nodeName.toLowerCase();e.target.classList.contains("nodrag")||u(e.target,".nodrag")||-1!==["input","select","textarea","button","a"].indexOf(t)?this.active=!1:(e.preventDefault(),(e.target===this.el||"img"!==t&&u(e.target,".gslide-inline"))&&(this.active=!0,this.el.classList.add("dragging"),this.dragContainer=u(e.target,".ginner-container")))}}},{key:"dragEnd",value:function(e){var t=this;e&&e.preventDefault(),this.initialX=0,this.initialY=0,this.currentX=null,this.currentY=null,this.initialX=null,this.initialY=null,this.xOffset=0,this.yOffset=0,this.active=!1,this.doSlideChange&&(this.instance.preventOutsideClick=!0,"right"==this.doSlideChange&&this.instance.prevSlide(),"left"==this.doSlideChange&&this.instance.nextSlide()),this.doSlideClose&&this.instance.close(),this.toleranceReached||this.setTranslate(this.dragContainer,0,0,!0),setTimeout((function(){t.instance.preventOutsideClick=!1,t.toleranceReached=!1,t.lastDirection=null,t.dragging=!1,t.el.isDragging=!1,t.el.classList.remove("dragging"),t.slide.classList.remove("dragging-nav"),t.dragContainer.style.transform="",t.dragContainer.style.transition=""}),100)}},{key:"drag",value:function(e){if(this.active){e.preventDefault(),this.slide.classList.add("dragging-nav"),"touchmove"===e.type?(this.currentX=e.touches[0].clientX-this.initialX,this.currentY=e.touches[0].clientY-this.initialY):(this.currentX=e.clientX-this.initialX,this.currentY=e.clientY-this.initialY),this.xOffset=this.currentX,this.yOffset=this.currentY,this.el.isDragging=!0,this.dragging=!0,this.doSlideChange=!1,this.doSlideClose=!1;var t=Math.abs(this.currentX),i=Math.abs(this.currentY);if(t>0&&t>=Math.abs(this.currentY)&&(!this.lastDirection||"x"==this.lastDirection)){this.yOffset=0,this.lastDirection="x",this.setTranslate(this.dragContainer,this.currentX,0);var n=this.shouldChange();if(!this.instance.settings.dragAutoSnap&&n&&(this.doSlideChange=n),this.instance.settings.dragAutoSnap&&n)return this.instance.preventOutsideClick=!0,this.toleranceReached=!0,this.active=!1,this.instance.preventOutsideClick=!0,this.dragEnd(null),"right"==n&&this.instance.prevSlide(),void("left"==n&&this.instance.nextSlide())}if(this.toleranceY>0&&i>0&&i>=t&&(!this.lastDirection||"y"==this.lastDirection)){this.xOffset=0,this.lastDirection="y",this.setTranslate(this.dragContainer,0,this.currentY);var s=this.shouldClose();return!this.instance.settings.dragAutoSnap&&s&&(this.doSlideClose=!0),void(this.instance.settings.dragAutoSnap&&s&&this.instance.close())}}}},{key:"shouldChange",value:function(){var e=!1;if(Math.abs(this.currentX)>=this.toleranceX){var t=this.currentX>0?"right":"left";("left"==t&&this.slide!==this.slide.parentNode.lastChild||"right"==t&&this.slide!==this.slide.parentNode.firstChild)&&(e=t)}return e}},{key:"shouldClose",value:function(){var e=!1;return Math.abs(this.currentY)>=this.toleranceY&&(e=!0),e}},{key:"setTranslate",value:function(e,t,i){var n=arguments.length>3&&void 0!==arguments[3]&&arguments[3];e.style.transition=n?"all .2s ease":"",e.style.transform="translate3d(".concat(t,"px, ").concat(i,"px, 0)")}}]),e}();function j(e,t,i,n){var s=e.querySelector(".gslide-media"),l=new 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0!==arguments[0]?arguments[0]:{};t(this,e),this.defaults={href:"",sizes:"",srcset:"",title:"",type:"",videoProvider:"",description:"",alt:"",descPosition:"bottom",effect:"",width:"",height:"",content:!1,zoomable:!0,draggable:!0},L(i)&&(this.defaults=l(this.defaults,i))}return n(e,[{key:"sourceType",value:function(e){var t=e;if(null!==(e=e.toLowerCase()).match(/\.(jpeg|jpg|jpe|gif|png|apn|webp|avif|svg)/))return"image";if(e.match(/(youtube\.com|youtube-nocookie\.com)\/watch\?v=([a-zA-Z0-9\-_]+)/)||e.match(/youtu\.be\/([a-zA-Z0-9\-_]+)/)||e.match(/(youtube\.com|youtube-nocookie\.com)\/embed\/([a-zA-Z0-9\-_]+)/))return"video";if(e.match(/vimeo\.com\/([0-9]*)/))return"video";if(null!==e.match(/\.(mp4|ogg|webm|mov)/))return"video";if(null!==e.match(/\.(mp3|wav|wma|aac|ogg)/))return"audio";if(e.indexOf("#")>-1&&""!==t.split("#").pop().trim())return"inline";return e.indexOf("goajax=true")>-1?"ajax":"external"}},{key:"parseConfig",value:function(e,t){var i=this,n=l({descPosition:t.descPosition},this.defaults);if(L(e)&&!k(e)){O(e,"type")||(O(e,"content")&&e.content?e.type="inline":O(e,"href")&&(e.type=this.sourceType(e.href)));var s=l(n,e);return this.setSize(s,t),s}var r="",a=e.getAttribute("data-glightbox"),h=e.nodeName.toLowerCase();if("a"===h&&(r=e.href),"img"===h&&(r=e.src,n.alt=e.alt),n.href=r,o(n,(function(s,l){O(t,l)&&"width"!==l&&(n[l]=t[l]);var o=e.dataset[l];I(o)||(n[l]=i.sanitizeValue(o))})),n.content&&(n.type="inline"),!n.type&&r&&(n.type=this.sourceType(r)),I(a)){if(!n.title&&"a"==h){var d=e.title;I(d)||""===d||(n.title=d)}if(!n.title&&"img"==h){var c=e.alt;I(c)||""===c||(n.title=c)}}else{var u=[];o(n,(function(e,t){u.push(";\\s?"+t)})),u=u.join("\\s?:|"),""!==a.trim()&&o(n,(function(e,t){var s=a,l=new RegExp("s?"+t+"s?:s?(.*?)("+u+"s?:|$)"),o=s.match(l);if(o&&o.length&&o[1]){var r=o[1].trim().replace(/;\s*$/,"");n[t]=i.sanitizeValue(r)}}))}if(n.description&&"."===n.description.substring(0,1)){var g;try{g=document.querySelector(n.description).innerHTML}catch(e){if(!(e instanceof DOMException))throw e}g&&(n.description=g)}if(!n.description){var v=e.querySelector(".glightbox-desc");v&&(n.description=v.innerHTML)}return this.setSize(n,t,e),this.slideConfig=n,n}},{key:"setSize",value:function(e,t){var i=arguments.length>2&&void 0!==arguments[2]?arguments[2]:null,n="video"==e.type?this.checkSize(t.videosWidth):this.checkSize(t.width),s=this.checkSize(t.height);return e.width=O(e,"width")&&""!==e.width?this.checkSize(e.width):n,e.height=O(e,"height")&&""!==e.height?this.checkSize(e.height):s,i&&"image"==e.type&&(e._hasCustomWidth=!!i.dataset.width,e._hasCustomHeight=!!i.dataset.height),e}},{key:"checkSize",value:function(e){return M(e)?"".concat(e,"px"):e}},{key:"sanitizeValue",value:function(e){return"true"!==e&&"false"!==e?e:"true"===e}}]),e}(),$=function(){function e(i,n,s){t(this,e),this.element=i,this.instance=n,this.index=s}return n(e,[{key:"setContent",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:null,i=arguments.length>1&&void 0!==arguments[1]&&arguments[1];if(c(t,"loaded"))return!1;var n=this.instance.settings,s=this.slideConfig,l=w();T(n.beforeSlideLoad)&&n.beforeSlideLoad({index:this.index,slide:t,player:!1});var o=s.type,r=s.descPosition,a=t.querySelector(".gslide-media"),d=t.querySelector(".gslide-title"),u=t.querySelector(".gslide-desc"),g=t.querySelector(".gdesc-inner"),v=i,f="gSlideTitle_"+this.index,p="gSlideDesc_"+this.index;if(T(n.afterSlideLoad)&&(v=function(){T(i)&&i(),n.afterSlideLoad({index:e.index,slide:t,player:e.instance.getSlidePlayerInstance(e.index)})}),""==s.title&&""==s.description?g&&g.parentNode.parentNode.removeChild(g.parentNode):(d&&""!==s.title?(d.id=f,d.innerHTML=s.title):d.parentNode.removeChild(d),u&&""!==s.description?(u.id=p,l&&n.moreLength>0?(s.smallDescription=this.slideShortDesc(s.description,n.moreLength,n.moreText),u.innerHTML=s.smallDescription,this.descriptionEvents(u,s)):u.innerHTML=s.description):u.parentNode.removeChild(u),h(a.parentNode,"desc-".concat(r)),h(g.parentNode,"description-".concat(r))),h(a,"gslide-".concat(o)),h(t,"loaded"),"video"!==o){if("external"!==o)return"inline"===o?(G.apply(this.instance,[t,s,this.index,v]),void(s.draggable&&new V({dragEl:t.querySelector(".gslide-inline"),toleranceX:n.dragToleranceX,toleranceY:n.dragToleranceY,slide:t,instance:this.instance}))):void("image"!==o?T(v)&&v():j(t,s,this.index,(function(){var i=t.querySelector("img");s.draggable&&new V({dragEl:i,toleranceX:n.dragToleranceX,toleranceY:n.dragToleranceY,slide:t,instance:e.instance}),s.zoomable&&i.naturalWidth>i.offsetWidth&&(h(i,"zoomable"),new H(i,t,(function(){e.instance.resize()}))),T(v)&&v()})));Z.apply(this,[t,s,this.index,v])}else F.apply(this.instance,[t,s,this.index,v])}},{key:"slideShortDesc",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:50,i=arguments.length>2&&void 0!==arguments[2]&&arguments[2],n=document.createElement("div");n.innerHTML=e;var s=n.innerText,l=i;if((e=s.trim()).length<=t)return e;var o=e.substr(0,t-1);return l?(n=null,o+'... <a href="#" class="desc-more">'+i+"</a>"):o}},{key:"descriptionEvents",value:function(e,t){var i=this,n=e.querySelector(".desc-more");if(!n)return!1;a("click",{onElement:n,withCallback:function(e,n){e.preventDefault();var s=document.body,l=u(n,".gslide-desc");if(!l)return!1;l.innerHTML=t.description,h(s,"gdesc-open");var o=a("click",{onElement:[s,u(l,".gslide-description")],withCallback:function(e,n){"a"!==e.target.nodeName.toLowerCase()&&(d(s,"gdesc-open"),h(s,"gdesc-closed"),l.innerHTML=t.smallDescription,i.descriptionEvents(l,t),setTimeout((function(){d(s,"gdesc-closed")}),400),o.destroy())}})}})}},{key:"create",value:function(){return m(this.instance.settings.slideHTML)}},{key:"getConfig",value:function(){k(this.element)||this.element.hasOwnProperty("draggable")||(this.element.draggable=this.instance.settings.draggable);var e=new U(this.instance.settings.slideExtraAttributes);return this.slideConfig=e.parseConfig(this.element,this.instance.settings),this.slideConfig}}]),e}(),J=w(),K=null!==w()||void 0!==document.createTouch||"ontouchstart"in window||"onmsgesturechange"in window||navigator.msMaxTouchPoints,Q=document.getElementsByTagName("html")[0],ee={selector:".glightbox",elements:null,skin:"clean",theme:"clean",closeButton:!0,startAt:null,autoplayVideos:!0,autofocusVideos:!0,descPosition:"bottom",width:"900px",height:"506px",videosWidth:"960px",beforeSlideChange:null,afterSlideChange:null,beforeSlideLoad:null,afterSlideLoad:null,slideInserted:null,slideRemoved:null,slideExtraAttributes:null,onOpen:null,onClose:null,loop:!1,zoomable:!0,draggable:!0,dragAutoSnap:!1,dragToleranceX:40,dragToleranceY:65,preload:!0,oneSlidePerOpen:!1,touchNavigation:!0,touchFollowAxis:!0,keyboardNavigation:!0,closeOnOutsideClick:!0,plugins:!1,plyr:{css:"https://cdn.plyr.io/3.6.12/plyr.css",js:"https://cdn.plyr.io/3.6.12/plyr.js",config:{ratio:"16:9",fullscreen:{enabled:!0,iosNative:!0},youtube:{noCookie:!0,rel:0,showinfo:0,iv_load_policy:3},vimeo:{byline:!1,portrait:!1,title:!1,transparent:!1}}},openEffect:"zoom",closeEffect:"zoom",slideEffect:"slide",moreText:"See more",moreLength:60,cssEfects:{fade:{in:"fadeIn",out:"fadeOut"},zoom:{in:"zoomIn",out:"zoomOut"},slide:{in:"slideInRight",out:"slideOutLeft"},slideBack:{in:"slideInLeft",out:"slideOutRight"},none:{in:"none",out:"none"}},svg:{close:'<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 512 512" xml:space="preserve"><g><g><path d="M505.943,6.058c-8.077-8.077-21.172-8.077-29.249,0L6.058,476.693c-8.077,8.077-8.077,21.172,0,29.249C10.096,509.982,15.39,512,20.683,512c5.293,0,10.586-2.019,14.625-6.059L505.943,35.306C514.019,27.23,514.019,14.135,505.943,6.058z"/></g></g><g><g><path d="M505.942,476.694L35.306,6.059c-8.076-8.077-21.172-8.077-29.248,0c-8.077,8.076-8.077,21.171,0,29.248l470.636,470.636c4.038,4.039,9.332,6.058,14.625,6.058c5.293,0,10.587-2.019,14.624-6.057C514.018,497.866,514.018,484.771,505.942,476.694z"/></g></g></svg>',next:'<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" 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e=this,t=this.getSelector();t&&(this.baseEvents=a("click",{onElement:t,withCallback:function(t,i){t.preventDefault(),e.open(i)}})),this.elements=this.getElements()}},{key:"open",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:null,t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:null;if(0===this.elements.length)return!1;this.activeSlide=null,this.prevActiveSlideIndex=null,this.prevActiveSlide=null;var i=M(t)?t:this.settings.startAt;if(k(e)){var n=e.getAttribute("data-gallery");n&&(this.fullElementsList=this.elements,this.elements=this.getGalleryElements(this.elements,n)),I(i)&&(i=this.getElementIndex(e))<0&&(i=0)}M(i)||(i=0),this.build(),g(this.overlay,"none"===this.settings.openEffect?"none":this.settings.cssEfects.fade.in);var s=document.body,l=window.innerWidth-document.documentElement.clientWidth;if(l>0){var o=document.createElement("style");o.type="text/css",o.className="gcss-styles",o.innerText=".gscrollbar-fixer {margin-right: ".concat(l,"px}"),document.head.appendChild(o),h(s,"gscrollbar-fixer")}h(s,"glightbox-open"),h(Q,"glightbox-open"),J&&(h(document.body,"glightbox-mobile"),this.settings.slideEffect="slide"),this.showSlide(i,!0),1===this.elements.length?(h(this.prevButton,"glightbox-button-hidden"),h(this.nextButton,"glightbox-button-hidden")):(d(this.prevButton,"glightbox-button-hidden"),d(this.nextButton,"glightbox-button-hidden")),this.lightboxOpen=!0,this.trigger("open"),T(this.settings.onOpen)&&this.settings.onOpen(),K&&this.settings.touchNavigation&&B(this),this.settings.keyboardNavigation&&X(this)}},{key:"openAt",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:0;this.open(null,e)}},{key:"showSlide",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:0,i=arguments.length>1&&void 0!==arguments[1]&&arguments[1];f(this.loader),this.index=parseInt(t);var n=this.slidesContainer.querySelector(".current");n&&d(n,"current"),this.slideAnimateOut();var s=this.slidesContainer.querySelectorAll(".gslide")[t];if(c(s,"loaded"))this.slideAnimateIn(s,i),p(this.loader);else{f(this.loader);var l=this.elements[t],o={index:this.index,slide:s,slideNode:s,slideConfig:l.slideConfig,slideIndex:this.index,trigger:l.node,player:null};this.trigger("slide_before_load",o),l.instance.setContent(s,(function(){p(e.loader),e.resize(),e.slideAnimateIn(s,i),e.trigger("slide_after_load",o)}))}this.slideDescription=s.querySelector(".gslide-description"),this.slideDescriptionContained=this.slideDescription&&c(this.slideDescription.parentNode,"gslide-media"),this.settings.preload&&(this.preloadSlide(t+1),this.preloadSlide(t-1)),this.updateNavigationClasses(),this.activeSlide=s}},{key:"preloadSlide",value:function(e){var t=this;if(e<0||e>this.elements.length-1)return!1;if(I(this.elements[e]))return!1;var i=this.slidesContainer.querySelectorAll(".gslide")[e];if(c(i,"loaded"))return!1;var n=this.elements[e],s=n.type,l={index:e,slide:i,slideNode:i,slideConfig:n.slideConfig,slideIndex:e,trigger:n.node,player:null};this.trigger("slide_before_load",l),"video"===s||"external"===s?setTimeout((function(){n.instance.setContent(i,(function(){t.trigger("slide_after_load",l)}))}),200):n.instance.setContent(i,(function(){t.trigger("slide_after_load",l)}))}},{key:"prevSlide",value:function(){this.goToSlide(this.index-1)}},{key:"nextSlide",value:function(){this.goToSlide(this.index+1)}},{key:"goToSlide",value:function(){var e=arguments.length>0&&void 0!==arguments[0]&&arguments[0];if(this.prevActiveSlide=this.activeSlide,this.prevActiveSlideIndex=this.index,!this.loop()&&(e<0||e>this.elements.length-1))return!1;e<0?e=this.elements.length-1:e>=this.elements.length&&(e=0),this.showSlide(e)}},{key:"insertSlide",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:-1;t<0&&(t=this.elements.length);var i=new $(e,this,t),n=i.getConfig(),s=l({},n),o=i.create(),r=this.elements.length-1;s.index=t,s.node=!1,s.instance=i,s.slideConfig=n,this.elements.splice(t,0,s);var a=null,h=null;if(this.slidesContainer){if(t>r)this.slidesContainer.appendChild(o);else{var d=this.slidesContainer.querySelectorAll(".gslide")[t];this.slidesContainer.insertBefore(o,d)}(this.settings.preload&&0==this.index&&0==t||this.index-1==t||this.index+1==t)&&this.preloadSlide(t),0===this.index&&0===t&&(this.index=1),this.updateNavigationClasses(),a=this.slidesContainer.querySelectorAll(".gslide")[t],h=this.getSlidePlayerInstance(t),s.slideNode=a}this.trigger("slide_inserted",{index:t,slide:a,slideNode:a,slideConfig:n,slideIndex:t,trigger:null,player:h}),T(this.settings.slideInserted)&&this.settings.slideInserted({index:t,slide:a,player:h})}},{key:"removeSlide",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:-1;if(e<0||e>this.elements.length-1)return!1;var t=this.slidesContainer&&this.slidesContainer.querySelectorAll(".gslide")[e];t&&(this.getActiveSlideIndex()==e&&(e==this.elements.length-1?this.prevSlide():this.nextSlide()),t.parentNode.removeChild(t)),this.elements.splice(e,1),this.trigger("slide_removed",e),T(this.settings.slideRemoved)&&this.settings.slideRemoved(e)}},{key:"slideAnimateIn",value:function(e,t){var i=this,n=e.querySelector(".gslide-media"),s=e.querySelector(".gslide-description"),l={index:this.prevActiveSlideIndex,slide:this.prevActiveSlide,slideNode:this.prevActiveSlide,slideIndex:this.prevActiveSlide,slideConfig:I(this.prevActiveSlideIndex)?null:this.elements[this.prevActiveSlideIndex].slideConfig,trigger:I(this.prevActiveSlideIndex)?null:this.elements[this.prevActiveSlideIndex].node,player:this.getSlidePlayerInstance(this.prevActiveSlideIndex)},o={index:this.index,slide:this.activeSlide,slideNode:this.activeSlide,slideConfig:this.elements[this.index].slideConfig,slideIndex:this.index,trigger:this.elements[this.index].node,player:this.getSlidePlayerInstance(this.index)};if(n.offsetWidth>0&&s&&(p(s),s.style.display=""),d(e,this.effectsClasses),t)g(e,this.settings.cssEfects[this.settings.openEffect].in,(function(){i.settings.autoplayVideos&&i.slidePlayerPlay(e),i.trigger("slide_changed",{prev:l,current:o}),T(i.settings.afterSlideChange)&&i.settings.afterSlideChange.apply(i,[l,o])}));else{var r=this.settings.slideEffect,a="none"!==r?this.settings.cssEfects[r].in:r;this.prevActiveSlideIndex>this.index&&"slide"==this.settings.slideEffect&&(a=this.settings.cssEfects.slideBack.in),g(e,a,(function(){i.settings.autoplayVideos&&i.slidePlayerPlay(e),i.trigger("slide_changed",{prev:l,current:o}),T(i.settings.afterSlideChange)&&i.settings.afterSlideChange.apply(i,[l,o])}))}setTimeout((function(){i.resize(e)}),100),h(e,"current")}},{key:"slideAnimateOut",value:function(){if(!this.prevActiveSlide)return!1;var e=this.prevActiveSlide;d(e,this.effectsClasses),h(e,"prev");var t=this.settings.slideEffect,i="none"!==t?this.settings.cssEfects[t].out:t;this.slidePlayerPause(e),this.trigger("slide_before_change",{prev:{index:this.prevActiveSlideIndex,slide:this.prevActiveSlide,slideNode:this.prevActiveSlide,slideIndex:this.prevActiveSlideIndex,slideConfig:I(this.prevActiveSlideIndex)?null:this.elements[this.prevActiveSlideIndex].slideConfig,trigger:I(this.prevActiveSlideIndex)?null:this.elements[this.prevActiveSlideIndex].node,player:this.getSlidePlayerInstance(this.prevActiveSlideIndex)},current:{index:this.index,slide:this.activeSlide,slideNode:this.activeSlide,slideIndex:this.index,slideConfig:this.elements[this.index].slideConfig,trigger:this.elements[this.index].node,player:this.getSlidePlayerInstance(this.index)}}),T(this.settings.beforeSlideChange)&&this.settings.beforeSlideChange.apply(this,[{index:this.prevActiveSlideIndex,slide:this.prevActiveSlide,player:this.getSlidePlayerInstance(this.prevActiveSlideIndex)},{index:this.index,slide:this.activeSlide,player:this.getSlidePlayerInstance(this.index)}]),this.prevActiveSlideIndex>this.index&&"slide"==this.settings.slideEffect&&(i=this.settings.cssEfects.slideBack.out),g(e,i,(function(){var t=e.querySelector(".ginner-container"),i=e.querySelector(".gslide-media"),n=e.querySelector(".gslide-description");t.style.transform="",i.style.transform="",d(i,"greset"),i.style.opacity="",n&&(n.style.opacity=""),d(e,"prev")}))}},{key:"getAllPlayers",value:function(){return this.videoPlayers}},{key:"getSlidePlayerInstance",value:function(e){var t="gvideo"+e,i=this.getAllPlayers();return!(!O(i,t)||!i[t])&&i[t]}},{key:"stopSlideVideo",value:function(e){if(k(e)){var t=e.querySelector(".gvideo-wrapper");t&&(e=t.getAttribute("data-index"))}console.log("stopSlideVideo is deprecated, use slidePlayerPause");var i=this.getSlidePlayerInstance(e);i&&i.playing&&i.pause()}},{key:"slidePlayerPause",value:function(e){if(k(e)){var t=e.querySelector(".gvideo-wrapper");t&&(e=t.getAttribute("data-index"))}var i=this.getSlidePlayerInstance(e);i&&i.playing&&i.pause()}},{key:"playSlideVideo",value:function(e){if(k(e)){var t=e.querySelector(".gvideo-wrapper");t&&(e=t.getAttribute("data-index"))}console.log("playSlideVideo is deprecated, use slidePlayerPlay");var i=this.getSlidePlayerInstance(e);i&&!i.playing&&i.play()}},{key:"slidePlayerPlay",value:function(e){var t;if(!J||null!==(t=this.settings.plyr.config)&&void 0!==t&&t.muted){if(k(e)){var i=e.querySelector(".gvideo-wrapper");i&&(e=i.getAttribute("data-index"))}var n=this.getSlidePlayerInstance(e);n&&!n.playing&&(n.play(),this.settings.autofocusVideos&&n.elements.container.focus())}}},{key:"setElements",value:function(e){var t=this;this.settings.elements=!1;var i=[];e&&e.length&&o(e,(function(e,n){var s=new $(e,t,n),o=s.getConfig(),r=l({},o);r.slideConfig=o,r.instance=s,r.index=n,i.push(r)})),this.elements=i,this.lightboxOpen&&(this.slidesContainer.innerHTML="",this.elements.length&&(o(this.elements,(function(){var e=m(t.settings.slideHTML);t.slidesContainer.appendChild(e)})),this.showSlide(0,!0)))}},{key:"getElementIndex",value:function(e){var t=!1;return o(this.elements,(function(i,n){if(O(i,"node")&&i.node==e)return t=n,!0})),t}},{key:"getElements",value:function(){var e=this,t=[];this.elements=this.elements?this.elements:[],!I(this.settings.elements)&&E(this.settings.elements)&&this.settings.elements.length&&o(this.settings.elements,(function(i,n){var s=new $(i,e,n),o=s.getConfig(),r=l({},o);r.node=!1,r.index=n,r.instance=s,r.slideConfig=o,t.push(r)}));var i=!1;return this.getSelector()&&(i=document.querySelectorAll(this.getSelector())),i?(o(i,(function(i,n){var s=new $(i,e,n),o=s.getConfig(),r=l({},o);r.node=i,r.index=n,r.instance=s,r.slideConfig=o,r.gallery=i.getAttribute("data-gallery"),t.push(r)})),t):t}},{key:"getGalleryElements",value:function(e,t){return e.filter((function(e){return e.gallery==t}))}},{key:"getSelector",value:function(){return!this.settings.elements&&(this.settings.selector&&"data-"==this.settings.selector.substring(0,5)?"*[".concat(this.settings.selector,"]"):this.settings.selector)}},{key:"getActiveSlide",value:function(){return this.slidesContainer.querySelectorAll(".gslide")[this.index]}},{key:"getActiveSlideIndex",value:function(){return this.index}},{key:"getAnimationClasses",value:function(){var e=[];for(var t in this.settings.cssEfects)if(this.settings.cssEfects.hasOwnProperty(t)){var i=this.settings.cssEfects[t];e.push("g".concat(i.in)),e.push("g".concat(i.out))}return e.join(" ")}},{key:"build",value:function(){var e=this;if(this.built)return!1;var t=document.body.childNodes,i=[];o(t,(function(e){e.parentNode==document.body&&"#"!==e.nodeName.charAt(0)&&e.hasAttribute&&!e.hasAttribute("aria-hidden")&&(i.push(e),e.setAttribute("aria-hidden","true"))}));var n=O(this.settings.svg,"next")?this.settings.svg.next:"",s=O(this.settings.svg,"prev")?this.settings.svg.prev:"",l=O(this.settings.svg,"close")?this.settings.svg.close:"",r=this.settings.lightboxHTML;r=m(r=(r=(r=r.replace(/{nextSVG}/g,n)).replace(/{prevSVG}/g,s)).replace(/{closeSVG}/g,l)),document.body.appendChild(r);var d=document.getElementById("glightbox-body");this.modal=d;var g=d.querySelector(".gclose");this.prevButton=d.querySelector(".gprev"),this.nextButton=d.querySelector(".gnext"),this.overlay=d.querySelector(".goverlay"),this.loader=d.querySelector(".gloader"),this.slidesContainer=document.getElementById("glightbox-slider"),this.bodyHiddenChildElms=i,this.events={},h(this.modal,"glightbox-"+this.settings.skin),this.settings.closeButton&&g&&(this.events.close=a("click",{onElement:g,withCallback:function(t,i){t.preventDefault(),e.close()}})),g&&!this.settings.closeButton&&g.parentNode.removeChild(g),this.nextButton&&(this.events.next=a("click",{onElement:this.nextButton,withCallback:function(t,i){t.preventDefault(),e.nextSlide()}})),this.prevButton&&(this.events.prev=a("click",{onElement:this.prevButton,withCallback:function(t,i){t.preventDefault(),e.prevSlide()}})),this.settings.closeOnOutsideClick&&(this.events.outClose=a("click",{onElement:d,withCallback:function(t,i){e.preventOutsideClick||c(document.body,"glightbox-mobile")||u(t.target,".ginner-container")||u(t.target,".gbtn")||c(t.target,"gnext")||c(t.target,"gprev")||e.close()}})),o(this.elements,(function(t,i){e.slidesContainer.appendChild(t.instance.create()),t.slideNode=e.slidesContainer.querySelectorAll(".gslide")[i]})),K&&h(document.body,"glightbox-touch"),this.events.resize=a("resize",{onElement:window,withCallback:function(){e.resize()}}),this.built=!0}},{key:"resize",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:null;if((e=e||this.activeSlide)&&!c(e,"zoomed")){var t=y(),i=e.querySelector(".gvideo-wrapper"),n=e.querySelector(".gslide-image"),s=this.slideDescription,l=t.width,o=t.height;if(l<=768?h(document.body,"glightbox-mobile"):d(document.body,"glightbox-mobile"),i||n){var r=!1;if(s&&(c(s,"description-bottom")||c(s,"description-top"))&&!c(s,"gabsolute")&&(r=!0),n)if(l<=768)n.querySelector("img");else if(r){var a=s.offsetHeight,u=n.querySelector("img");u.setAttribute("style","max-height: calc(100vh - ".concat(a,"px)")),s.setAttribute("style","max-width: ".concat(u.offsetWidth,"px;"))}if(i){var g=O(this.settings.plyr.config,"ratio")?this.settings.plyr.config.ratio:"";if(!g){var v=i.clientWidth,f=i.clientHeight,p=v/f;g="".concat(v/p,":").concat(f/p)}var m=g.split(":"),x=this.settings.videosWidth,b=this.settings.videosWidth,S=(b=M(x)||-1!==x.indexOf("px")?parseInt(x):-1!==x.indexOf("vw")?l*parseInt(x)/100:-1!==x.indexOf("vh")?o*parseInt(x)/100:-1!==x.indexOf("%")?l*parseInt(x)/100:parseInt(i.clientWidth))/(parseInt(m[0])/parseInt(m[1]));if(S=Math.floor(S),r&&(o-=s.offsetHeight),b>l||S>o||o<S&&l>b){var w=i.offsetWidth,T=i.offsetHeight,C=o/T,k={width:w*C,height:T*C};i.parentNode.setAttribute("style","max-width: ".concat(k.width,"px")),r&&s.setAttribute("style","max-width: ".concat(k.width,"px;"))}else i.parentNode.style.maxWidth="".concat(x),r&&s.setAttribute("style","max-width: ".concat(x,";"))}}}}},{key:"reload",value:function(){this.init()}},{key:"updateNavigationClasses",value:function(){var e=this.loop();d(this.nextButton,"disabled"),d(this.prevButton,"disabled"),0==this.index&&this.elements.length-1==0?(h(this.prevButton,"disabled"),h(this.nextButton,"disabled")):0!==this.index||e?this.index!==this.elements.length-1||e||h(this.nextButton,"disabled"):h(this.prevButton,"disabled")}},{key:"loop",value:function(){var e=O(this.settings,"loopAtEnd")?this.settings.loopAtEnd:null;return e=O(this.settings,"loop")?this.settings.loop:e,e}},{key:"close",value:function(){var e=this;if(!this.lightboxOpen){if(this.events){for(var t in this.events)this.events.hasOwnProperty(t)&&this.events[t].destroy();this.events=null}return!1}if(this.closing)return!1;this.closing=!0,this.slidePlayerPause(this.activeSlide),this.fullElementsList&&(this.elements=this.fullElementsList),this.bodyHiddenChildElms.length&&o(this.bodyHiddenChildElms,(function(e){e.removeAttribute("aria-hidden")})),h(this.modal,"glightbox-closing"),g(this.overlay,"none"==this.settings.openEffect?"none":this.settings.cssEfects.fade.out),g(this.activeSlide,this.settings.cssEfects[this.settings.closeEffect].out,(function(){if(e.activeSlide=null,e.prevActiveSlideIndex=null,e.prevActiveSlide=null,e.built=!1,e.events){for(var t in e.events)e.events.hasOwnProperty(t)&&e.events[t].destroy();e.events=null}var i=document.body;d(Q,"glightbox-open"),d(i,"glightbox-open touching gdesc-open glightbox-touch glightbox-mobile gscrollbar-fixer"),e.modal.parentNode.removeChild(e.modal),e.trigger("close"),T(e.settings.onClose)&&e.settings.onClose();var n=document.querySelector(".gcss-styles");n&&n.parentNode.removeChild(n),e.lightboxOpen=!1,e.closing=null}))}},{key:"destroy",value:function(){this.close(),this.clearAllEvents(),this.baseEvents&&this.baseEvents.destroy()}},{key:"on",value:function(e,t){var i=arguments.length>2&&void 0!==arguments[2]&&arguments[2];if(!e||!T(t))throw new TypeError("Event name and callback must be defined");this.apiEvents.push({evt:e,once:i,callback:t})}},{key:"once",value:function(e,t){this.on(e,t,!0)}},{key:"trigger",value:function(e){var t=this,i=arguments.length>1&&void 0!==arguments[1]?arguments[1]:null,n=[];o(this.apiEvents,(function(t,s){var l=t.evt,o=t.once,r=t.callback;l==e&&(r(i),o&&n.push(s))})),n.length&&o(n,(function(e){return t.apiEvents.splice(e,1)}))}},{key:"clearAllEvents",value:function(){this.apiEvents.splice(0,this.apiEvents.length)}},{key:"version",value:function(){return"3.1.0"}}]),e}();return function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},t=new te(e);return t.init(),t}}));

_extensions/schochastics/social-share/_extension.yml

@@ -0,0 +1,6 @@
+title: Share Post on Social Media
+author: David Schoch
+version: 0.1.0
+contributes:
+  filters:
+    - social-share.lua

_extensions/schochastics/social-share/_extensions/quarto-ext/fontawesome/_extension.yml

@@ -0,0 +1,6 @@
+title: Font Awesome support
+author: Carlos Scheidegger
+version: 0.0.1
+contributes:
+  shortcodes:
+    - fontawesome.lua

_extensions/schochastics/social-share/_extensions/quarto-ext/fontawesome/assets/css/latex-fontsize.css

@@ -0,0 +1,30 @@
+.fa-tiny {
+  font-size: 0.5em;
+}
+.fa-scriptsize {
+  font-size: 0.7em;
+}
+.fa-footnotesize {
+  font-size: 0.8em;
+}
+.fa-small {
+  font-size: 0.9em;
+}
+.fa-normalsize {
+  font-size: 1em;
+}
+.fa-large {
+  font-size: 1.2em;
+}
+.fa-Large {
+  font-size: 1.5em;
+}
+.fa-LARGE {
+  font-size: 1.75em;
+}
+.fa-huge {
+  font-size: 2em;
+}
+.fa-Huge {
+  font-size: 2.5em;
+}

_extensions/schochastics/social-share/_extensions/quarto-ext/fontawesome/fontawesome.lua

@@ -0,0 +1,77 @@
+local function ensureLatexDeps()
+  quarto.doc.useLatexPackage("fontawesome5")
+end
+
+local function ensureHtmlDeps()
+  quarto.doc.addHtmlDependency({
+    name = 'fontawesome6',
+    version = '0.1.0',
+    stylesheets = {'assets/css/all.css', 'assets/css/latex-fontsize.css'}
+  })
+end
+
+local function isEmpty(s)
+  return s == nil or s == ''
+end
+
+local function isValidSize(size)
+  local validSizes = {
+    "tiny",
+    "scriptsize",
+    "footnotesize",
+    "small",
+    "normalsize",
+    "large",
+    "Large",
+    "LARGE",
+    "huge",
+    "Huge"
+  }
+  for _, v in ipairs(validSizes) do
+    if v == size then
+      return size
+    end
+  end
+  return ""
+end
+
+return {
+  ["fa"] = function(args, kwargs)
+
+    local group = "solid"
+    local icon = pandoc.utils.stringify(args[1])
+    if #args > 1 then
+      group = icon
+      icon = pandoc.utils.stringify(args[2])
+    end
+    
+    local title = pandoc.utils.stringify(kwargs["title"])
+    if not isEmpty(title) then
+      title = " title=\"" .. title  .. "\""
+    end
+
+    local size = pandoc.utils.stringify(kwargs["size"])
+    
+    -- detect html (excluding epub which won't handle fa)
+    if quarto.doc.isFormat("html:js") then
+      ensureHtmlDeps()
+      if not isEmpty(size) then
+        size = " fa-" .. size
+      end
+      return pandoc.RawInline(
+        'html',
+        "<i class=\"fa-" .. group .. " fa-" .. icon .. size .. "\"" .. title .. " aria-hidden=\"true\"></i>"
+      )
+    -- detect pdf / beamer / latex / etc
+    elseif quarto.doc.isFormat("pdf") then
+      ensureLatexDeps()
+      if isEmpty(isValidSize(size)) then
+        return pandoc.RawInline('tex', "\\faIcon{" .. icon .. "}")
+      else
+        return pandoc.RawInline('tex', "{\\" .. size .. "\\faIcon{" .. icon .. "}}")
+      end
+    else
+      return pandoc.Null()
+    end
+  end
+}

_extensions/schochastics/social-share/social-share.css

@@ -0,0 +1,99 @@
+/*adapted from: https://www.remysheppard.com/blog/hugo-share-buttons/*/
+.social-share {
+  display: flex;
+  flex-direction: row;
+  justify-content: space-evenly;
+  flex-wrap: wrap;
+}
+
+.social-share a {
+  border-radius: 25px;
+  padding: 0.25rem 0.5rem;
+  background: white;
+  border: 1px solid transparent;
+  transition: background ease 0.3s, color ease 0.3s;
+  margin-bottom: 1em;
+  text-decoration: none;
+}
+
+.social-share a:before {
+  display: none;
+}
+
+.social-share a.facebook {
+  border-color: #4267B2;
+    color: #4267B2;
+}
+
+.social-share a.facebook:hover {
+  background: #4267B2;
+    color: white;
+}
+
+.social-share a.twitter {
+  border-color: #1DA1F2;
+    color: #1DA1F2;
+}
+
+.social-share a.twitter:hover {
+  background: #1DA1F2;
+    color: white;
+}
+
+.social-share a.reddit {
+  border-color: #FF4500;
+    color: #FF4500;
+}
+.social-share a.reddit:hover {
+  background: #FF4500;
+    color: white;
+}
+
+.social-share a.stumbleupon {
+  border-color: #EB471D;
+    color: #EB471D;
+}
+
+.social-share a.stumbleupon:hover {
+  background: #EB471D;
+    color: white;
+}
+
+.social-share a.tumblr {
+  border-color: #35465C;
+    color: #35465C;
+}
+.social-share a.tumblr:hover {
+  background: #35465C;
+    color: white;
+}
+
+.social-share a.linkedin {
+  border-color: #2867B2;
+    color: #2867B2;
+}
+
+.social-share a.linkedin:hover {
+  background: #2867B2;
+    color: white;
+}
+
+.social-share a.email {
+  border-color: #00A4EF;
+    color: #00A4EF;
+}
+
+.social-share a.email:hover {
+  background: #00A4EF;
+    color: white;
+}
+
+.social-share a.mastodon {
+  border-color: #6364FF;
+    color: #6364FF;
+}
+
+.social-share a.mastodon:hover {
+  background: #6364FF;
+    color: white;
+}

_extensions/schochastics/social-share/social-share.lua

@@ -0,0 +1,50 @@
+local function ensureHtmlDeps()
+  quarto.doc.addHtmlDependency({
+    name = 'social-share',
+    version = '0.1.0',
+    stylesheets = {
+      'social-share.css',
+      '_extensions/quarto-ext/fontawesome/assets/css/all.css'
+    }
+  })
+end
+
+function Meta(m)
+  ensureHtmlDeps()
+  local share_start = '<div class= "page-columns page-rows-contents page-layout-article"><div class="social-share">'
+  local share_end = '</div></div>'
+  local share_text = share_start
+
+  local share_url = pandoc.utils.stringify(m.share.permalink)
+  if m.share.description~=nil then
+    post_title = pandoc.utils.stringify(m.share.description)
+  else 
+    post_title = pandoc.utils.stringify(m.title)
+  end
+  if m.share.twitter then
+    share_text = share_text .. '<a href="https://twitter.com/share?url='.. share_url .. '&text='.. post_title ..'" target="_blank" class="twitter"><i class="fab fa-twitter fa-fw fa-lg"></i></a>'
+  end
+  if m.share.linkedin then
+    share_text = share_text .. '<a href="https://www.linkedin.com/shareArticle?url='.. share_url ..'&title='.. post_title ..'" target="_blank" class="linkedin"><i class="fa-brands fa-linkedin-in fa-fw fa-lg"></i></a>'
+  end
+  if m.share.email then
+    share_text = share_text .. '  <a href="mailto:?subject='.. post_title ..'&body=Check out this link:'.. share_url ..'" target="_blank" class="email"><i class="fa-solid fa-envelope fa-fw fa-lg"></i></a>'
+  end
+  if m.share.facebook then
+    share_text = share_text .. '<a href="https://www.facebook.com/sharer.php?u='.. share_url ..'" target="_blank" class="facebook"><i class="fab fa-facebook-f fa-fw fa-lg"></i></a>'
+  end
+  if m.share.reddit then
+      share_text = share_text .. '<a href="https://reddit.com/submit?url='.. share_url ..'&title='.. post_title ..'" target="_blank" class="reddit">   <i class="fa-brands fa-reddit-alien fa-fw fa-lg"></i></a>'
+  end
+  if m.share.stumble then
+    share_text = share_text .. '<a href="https://www.stumbleupon.com/submit?url='.. share_url ..'&title='.. post_title ..'" target="_blank" class="stumbleupon"><i class="fa-brands fa-stumbleupon fa-fw fa-lg"></i></a>'
+  end
+  if m.share.tumblr then
+    share_text = share_text .. '<a href="https://www.tumblr.com/share/link?url='.. share_url ..'&name='.. post_title ..'" target="_blank" class="tumblr"><i class="fa-brands fa-tumblr fa-fw fa-lg"></i></a>'
+  end
+  if m.share.mastodon then
+    share_text = share_text .. '<a href="javascript:void(0);" onclick="var mastodon_instance=prompt(\'Mastodon Instance / Server Name?\'); if(typeof mastodon_instance===\'string\' &amp;&amp; mastodon_instance.length){this.href=\'https://\'+mastodon_instance+\'/share?text=' .. post_title..' '.. share_url ..'\'}else{return false;}" target="_blank" class="mastodon"><i class="fa-brands fa-mastodon fa-fw fa-lg"></i></a>'
+  end
+  share_text = share_text .. share_end
+  quarto.doc.includeText("after-body", share_text)
+end

_extensions/shafayetShafee/downloadthis/_extension.yml

@@ -0,0 +1,8 @@
+title: Downloadthis
+author: Shafayet Khan Shafee
+version: 1.0.0
+quarto-required: ">=1.2.0"
+contributes:
+  shortcodes:
+    - downloadthis.lua
+

_extensions/shafayetShafee/downloadthis/downloadthis.lua

@@ -0,0 +1,121 @@
+--[[
+MIT License
+
+Copyright (c) 2023 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 p = quarto.log.output
+
+local function ensureHtmlDeps()
+  quarto.doc.add_html_dependency({
+    name = "downloadthis",
+    version = "1.9.1",
+    stylesheets = {"resources/css/downloadthis.css"}
+  })
+end
+
+local function optional(arg, default)
+  if arg == nil or arg == ""
+  then
+    return default
+  else
+    return arg
+  end
+end
+
+function import(script)
+  local path = PANDOC_SCRIPT_FILE:match("(.*[/\\])") .. "resources/lua/"
+  package.path = path .. script .. ";" .. package.path
+  return require(script)
+end
+
+local b64 = import('base64.lua')
+local puremagic = import('puremagic.lua')
+
+return {
+  ['downloadthis'] = function(args, kwargs, meta) 
+    
+    -- args and kwargs    
+    local file_path = str(args[1])
+    local extension = "." .. file_path:match("[^.]+$")
+    local dname = optional(str(kwargs["dname"]), "file")
+    local dfilename = dname .. extension
+    local btn_label = " " .. optional(str(kwargs["label"]), "Download") .. " "
+    local btn_type = optional(str(kwargs["type"]), "default")
+    local icon = optional(str(kwargs["icon"]), "download")
+    local class = " " .. optional(str(kwargs["class"]), "")
+    local rand = "dnldts" .. str(math.random(1, 65000))
+    local id = optional(str(kwargs["id"]), rand)
+    -- reading files
+    local fh = io.open(file_path, "rb")
+    if not fh then
+        io.stderr:write("Cannot open file " .. 
+          file_path .. 
+          " | Skipping adding buttons\n")
+        return pandoc.Null()
+    else
+      local contents = fh:read("*all")
+      fh:close()
+      
+      -- creating dataURI object
+      local b64_encoded = b64.encode(contents)
+      local mimetype = puremagic.via_path(file_path)
+      local data_uri = 'data:' .. mimetype .. ";base64," .. b64_encoded
+      
+      -- js code taken from
+      -- https://github.com/fmmattioni/downloadthis/blob/master/R/utils.R#L59
+      local js = [[fetch('%s').then(res => res.blob()).then(blob => {
+      const downloadURL = window.URL.createObjectURL(blob);
+      const a = document.createElement('a');
+      document.body.appendChild(a);
+      a.href = downloadURL;
+      a.download = '%s'; a.click();
+      window.URL.revokeObjectURL(downloadURL);
+      document.body.removeChild(a);
+        });]]
+      
+      local clicked = js:format(data_uri, dfilename)
+      
+      -- creating button
+      local button = 
+          "<button class=\"btn btn-" .. btn_type .. " downloadthis " .. 
+          class .. "\"" ..
+          " id=\"" .. id .. "\"" ..
+          "><i class=\"bi bi-" .. icon .. "\"" .. "></i>" ..
+          btn_label .. 
+          "</button>"
+      if quarto.doc.is_format("html:js") and quarto.doc.has_bootstrap()
+      then
+        ensureHtmlDeps()
+        return pandoc.RawInline('html',
+        "<a href=\"#" .. id .. "\"" ..
+        " onclick=\"" .. clicked .. "\">" .. button .. "</a>"
+        )
+      else
+        return pandoc.Null()
+      end
+    end
+  end
+}
+

_extensions/shafayetShafee/downloadthis/resources/css/downloadthis.css

@@ -0,0 +1,13 @@
+.downloadthis:focus,
+  .downloadthis:active  {
+     box-shadow: none !important;
+  }
+  
+  .downloadthis:hover {
+     transition: 0.2s;
+     filter: brightness(0.90);
+  }
+  
+  .downloadthis:active {
+     filter: brightness(0.80);
+}

_extensions/shafayetShafee/downloadthis/resources/lua/base64.lua

@@ -0,0 +1,201 @@
+--[[
+
+ base64 -- v1.5.3 public domain Lua base64 encoder/decoder
+ no warranty implied; use at your own risk
+
+ Needs bit32.extract function. If not present it's implemented using BitOp
+ or Lua 5.3 native bit operators. For Lua 5.1 fallbacks to pure Lua
+ implementation inspired by Rici Lake's post:
+   http://ricilake.blogspot.co.uk/2007/10/iterating-bits-in-lua.html
+
+ author: Ilya Kolbin (iskolbin@gmail.com)
+ url: github.com/iskolbin/lbase64
+
+ COMPATIBILITY
+
+ Lua 5.1+, LuaJIT
+
+ LICENSE
+
+ See end of file for license information.
+
+--]]
+
+
+local base64 = {}
+
+local extract = _G.bit32 and _G.bit32.extract -- Lua 5.2/Lua 5.3 in compatibility mode
+if not extract then
+	if _G.bit then -- LuaJIT
+		local shl, shr, band = _G.bit.lshift, _G.bit.rshift, _G.bit.band
+		extract = function( v, from, width )
+			return band( shr( v, from ), shl( 1, width ) - 1 )
+		end
+	elseif _G._VERSION == "Lua 5.1" then
+		extract = function( v, from, width )
+			local w = 0
+			local flag = 2^from
+			for i = 0, width-1 do
+				local flag2 = flag + flag
+				if v % flag2 >= flag then
+					w = w + 2^i
+				end
+				flag = flag2
+			end
+			return w
+		end
+	else -- Lua 5.3+
+		extract = load[[return function( v, from, width )
+			return ( v >> from ) & ((1 << width) - 1)
+		end]]()
+	end
+end
+
+
+function base64.makeencoder( s62, s63, spad )
+	local encoder = {}
+	for b64code, char in pairs{[0]='A','B','C','D','E','F','G','H','I','J',
+		'K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y',
+		'Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n',
+		'o','p','q','r','s','t','u','v','w','x','y','z','0','1','2',
+		'3','4','5','6','7','8','9',s62 or '+',s63 or'/',spad or'='} do
+		encoder[b64code] = char:byte()
+	end
+	return encoder
+end
+
+function base64.makedecoder( s62, s63, spad )
+	local decoder = {}
+	for b64code, charcode in pairs( base64.makeencoder( s62, s63, spad )) do
+		decoder[charcode] = b64code
+	end
+	return decoder
+end
+
+local DEFAULT_ENCODER = base64.makeencoder()
+local DEFAULT_DECODER = base64.makedecoder()
+
+local char, concat = string.char, table.concat
+
+function base64.encode( str, encoder, usecaching )
+	encoder = encoder or DEFAULT_ENCODER
+	local t, k, n = {}, 1, #str
+	local lastn = n % 3
+	local cache = {}
+	for i = 1, n-lastn, 3 do
+		local a, b, c = str:byte( i, i+2 )
+		local v = a*0x10000 + b*0x100 + c
+		local s
+		if usecaching then
+			s = cache[v]
+			if not s then
+				s = char(encoder[extract(v,18,6)], encoder[extract(v,12,6)], encoder[extract(v,6,6)], encoder[extract(v,0,6)])
+				cache[v] = s
+			end
+		else
+			s = char(encoder[extract(v,18,6)], encoder[extract(v,12,6)], encoder[extract(v,6,6)], encoder[extract(v,0,6)])
+		end
+		t[k] = s
+		k = k + 1
+	end
+	if lastn == 2 then
+		local a, b = str:byte( n-1, n )
+		local v = a*0x10000 + b*0x100
+		t[k] = char(encoder[extract(v,18,6)], encoder[extract(v,12,6)], encoder[extract(v,6,6)], encoder[64])
+	elseif lastn == 1 then
+		local v = str:byte( n )*0x10000
+		t[k] = char(encoder[extract(v,18,6)], encoder[extract(v,12,6)], encoder[64], encoder[64])
+	end
+	return concat( t )
+end
+
+function base64.decode( b64, decoder, usecaching )
+	decoder = decoder or DEFAULT_DECODER
+	local pattern = '[^%w%+%/%=]'
+	if decoder then
+		local s62, s63
+		for charcode, b64code in pairs( decoder ) do
+			if b64code == 62 then s62 = charcode
+			elseif b64code == 63 then s63 = charcode
+			end
+		end
+		pattern = ('[^%%w%%%s%%%s%%=]'):format( char(s62), char(s63) )
+	end
+	b64 = b64:gsub( pattern, '' )
+	local cache = usecaching and {}
+	local t, k = {}, 1
+	local n = #b64
+	local padding = b64:sub(-2) == '==' and 2 or b64:sub(-1) == '=' and 1 or 0
+	for i = 1, padding > 0 and n-4 or n, 4 do
+		local a, b, c, d = b64:byte( i, i+3 )
+		local s
+		if usecaching then
+			local v0 = a*0x1000000 + b*0x10000 + c*0x100 + d
+			s = cache[v0]
+			if not s then
+				local v = decoder[a]*0x40000 + decoder[b]*0x1000 + decoder[c]*0x40 + decoder[d]
+				s = char( extract(v,16,8), extract(v,8,8), extract(v,0,8))
+				cache[v0] = s
+			end
+		else
+			local v = decoder[a]*0x40000 + decoder[b]*0x1000 + decoder[c]*0x40 + decoder[d]
+			s = char( extract(v,16,8), extract(v,8,8), extract(v,0,8))
+		end
+		t[k] = s
+		k = k + 1
+	end
+	if padding == 1 then
+		local a, b, c = b64:byte( n-3, n-1 )
+		local v = decoder[a]*0x40000 + decoder[b]*0x1000 + decoder[c]*0x40
+		t[k] = char( extract(v,16,8), extract(v,8,8))
+	elseif padding == 2 then
+		local a, b = b64:byte( n-3, n-2 )
+		local v = decoder[a]*0x40000 + decoder[b]*0x1000
+		t[k] = char( extract(v,16,8))
+	end
+	return concat( t )
+end
+
+return base64
+
+--[[
+------------------------------------------------------------------------------
+This software is available under 2 licenses -- choose whichever you prefer.
+------------------------------------------------------------------------------
+ALTERNATIVE A - MIT License
+Copyright (c) 2018 Ilya Kolbin
+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.
+------------------------------------------------------------------------------
+ALTERNATIVE B - Public Domain (www.unlicense.org)
+This is free and unencumbered software released into the public domain.
+Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
+software, either in source code form or as a compiled binary, for any purpose,
+commercial or non-commercial, and by any means.
+In jurisdictions that recognize copyright laws, the author or authors of this
+software dedicate any and all copyright interest in the software to the public
+domain. We make this dedication for the benefit of the public at large and to
+the detriment of our heirs and successors. We intend this dedication to be an
+overt act of relinquishment in perpetuity of all present and future rights to
+this software under copyright law.
+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 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.
+------------------------------------------------------------------------------
+--]]

_extensions/shafayetShafee/downloadthis/resources/lua/puremagic.lua

@@ -0,0 +1,735 @@
+-- puremagic 1.0.1
+-- Copyright (c) 2014 Will Bond <will@wbond.net>
+-- Licensed under the MIT license.
+
+
+function basename(path)
+    local basename_match = path:match('[/\\]([^/\\]+)$')
+    if basename_match then
+        return basename_match, nil
+    end
+
+    return path, nil
+end
+
+
+function extension(path)
+    path = path:lower()
+    local tar_match = path:match('%.(tar%.[^.]+)$')
+    if tar_match then
+        return tar_match
+    end
+    if path:sub(#path - 11, #path) == '.numbers.zip' then
+        return 'numbers.zip'
+    end
+    if path:sub(#path - 9, #path) == '.pages.zip' then
+        return 'pages.zip'
+    end
+    if path:sub(#path - 7, #path) == '.key.zip' then
+        return 'key.zip'
+    end
+    return path:match('%.([^.]+)$')
+end
+
+
+function in_table(value, list)
+    for i=1, #list do
+        if list[i] == value then
+            return true
+        end
+    end
+    return false
+end
+
+
+function string_to_bit_table(chars)
+    local output = {}
+    for char in chars:gmatch('.') do
+        local num = string.byte(char)
+        local bits = {0, 0, 0, 0, 0, 0, 0, 0}
+        for bit=8, 1, -1 do
+            if num > 0 then
+                bits[bit] = math.fmod(num, 2)
+                num = (num - bits[bit]) / 2
+            end
+        end
+        table.insert(output, bits)
+    end
+    return output
+end
+
+
+function bit_table_to_string(bits)
+    local output = {}
+    for i = 1, #bits do
+        local num = tonumber(table.concat(bits[i]), 2)
+        table.insert(output, string.format('%c', num))
+    end
+    return table.concat(output)
+end
+
+
+function bitwise_and(a, b)
+    local a_bytes = string_to_bit_table(a)
+    local b_bytes = string_to_bit_table(b)
+
+    local output = {}
+    for i = 1, #a_bytes do
+        local bits = {0, 0, 0, 0, 0, 0, 0, 0}
+        for j = 1, 8 do
+            if a_bytes[i][j] == 1 and b_bytes[i][j] == 1 then
+                bits[j] = 1
+            else
+                bits[j] = 0
+            end
+        end
+        table.insert(output, bits)
+    end
+
+    return bit_table_to_string(output)
+end
+
+
+-- Unpack a little endian byte string into an integer
+function unpack_le(chars)
+    local bit_table = string_to_bit_table(chars)
+    -- Merge the bits into a string of 1s and 0s
+    local result = {}
+    for i=1, #bit_table do
+        result[#chars + 1 - i] = table.concat(bit_table[i])
+    end
+    return tonumber(table.concat(result), 2)
+end
+
+
+-- Unpack a big endian byte string into an integer
+function unpack_be(chars)
+    local bit_table = string_to_bit_table(chars)
+    -- Merge the bits into a string of 1s and 0s
+    for i=1, #bit_table do
+        bit_table[i] = table.concat(bit_table[i])
+    end
+    return tonumber(table.concat(bit_table), 2)
+end
+
+
+-- Takes the first 4-8k of an EBML file and identifies if it is matroska or webm
+-- and it it contains just video or just audio.
+function ebml_parse(content)
+    local position = 1
+    local length = #content
+
+    local header_token, header_value, used_bytes = ebml_parse_section(content)
+    position = position + used_bytes
+
+
+    if header_token ~= '\x1AE\xDF\xA3' then
+        return nil, 'Unable to find EBML ID'
+    end
+
+    -- The matroska spec sets the default doctype to be 'matroska', however
+    -- many file specify this anyway. The other option is 'webm'.
+    local doctype = 'matroska'
+    if header_value['B\x82'] then
+        doctype = header_value['B\x82']
+    end
+
+    if doctype ~= 'matroska' and doctype ~= 'webm' then
+        return nil, 'Unknown EBML doctype'
+    end
+
+    local segment_position = nil
+    local track_position = nil
+    local has_video = false
+    local found_tracks = false
+
+    while position <= length do
+        local ebml_id, ebml_value, used_bytes = ebml_parse_section(content:sub(position, length))
+        position = position + used_bytes
+
+        -- Segment
+        if ebml_id == '\x18S\x80g' then
+            segment_position = position
+        end
+
+        -- Meta seek information
+        if ebml_id == '\x11M\x9Bt' then
+            -- Look for the seek info about the tracks token
+            for i, child in ipairs(ebml_value['M\xBB']) do
+                if child['S\xAB'] == '\x16T\xAEk' then
+                    track_position = segment_position + unpack_be(child['S\xAC'])
+                    position = track_position
+                    break
+                end
+            end
+        end
+
+        -- Track
+        if ebml_id == '\x16T\xAEk' then
+            found_tracks = true
+            -- Scan through each track looking for video
+            for i, child in ipairs(ebml_value['\xAE']) do
+                -- Look to see if the track type is video
+                if unpack_be(child['\x83']) == 1 then
+                    has_video = true
+                    break
+                end
+            end
+            break
+        end
+    end
+
+    if found_tracks and not has_video then
+        if doctype == 'matroska' then
+            return 'audio/x-matroska'
+        else
+            return 'audio/webm'
+        end
+    end
+
+    if doctype == 'matroska' then
+        return 'video/x-matroska'
+    else
+        return 'video/webm'
+    end
+end
+
+
+-- Parses a section of an EBML document, returning the EBML ID at the beginning,
+-- plus the value as a table with child EBML IDs as keys and the number of
+-- bytes from the content that contained the ID and value
+function ebml_parse_section(content)
+    local ebml_id, element_length, used_bytes = ebml_id_and_length(content)
+
+    -- Don't parse the segment since it is the whole file!
+    if ebml_id == '\x18\x53\x80\x67' then
+        return ebml_id, nil, used_bytes
+    end
+
+    local ebml_value = content:sub(used_bytes + 1, used_bytes + element_length)
+    used_bytes = used_bytes + element_length
+
+    -- We always parse the return value of level 0/1 elements
+    local recursive_parse = false
+    if #ebml_id == 4 then
+        recursive_parse = true
+
+    -- We need Seek information
+    elseif ebml_id == '\x4D\xBB' then
+        recursive_parse = true
+
+    -- We want the top-level of TrackEntry to grab the TrackType
+    elseif ebml_id == '\xAE' then
+        recursive_parse = true
+    end
+
+    if recursive_parse then
+        local buffer = ebml_value
+        ebml_value = {}
+
+        -- Track which child entries have been converted to an array
+        local array_children = {}
+
+        while #buffer > 0 do
+            local child_ebml_id, child_ebml_value, child_used_bytes = ebml_parse_section(buffer)
+
+            if array_children[child_ebml_id] then
+                table.insert(ebml_value[child_ebml_id], child_ebml_value)
+
+            -- Single values are just stores by themselves
+            elseif ebml_value[child_ebml_id] == nil then
+                -- Force seek info and tracks to be arrays even if there is only one
+                if child_ebml_id == 'M\xBB' or child_ebml_id == '\xAE' then
+                    child_ebml_value = {child_ebml_value}
+                    array_children[child_ebml_id] = true
+                end
+                ebml_value[child_ebml_id] = child_ebml_value
+
+            -- If there is already a value for the ID, turn it into a table
+            else
+                ebml_value[child_ebml_id] = {ebml_value[child_ebml_id], child_ebml_value}
+                array_children[child_ebml_id] = true
+            end
+
+            -- Move past the part we've parsed
+            buffer = buffer:sub(child_used_bytes + 1, #buffer)
+        end
+    end
+
+    return ebml_id, ebml_value, used_bytes
+end
+
+
+-- Should accept 12+ bytes, will return the ebml id, the data length and the
+-- number of bytes that were used to hold those values.
+function ebml_id_and_length(chars)
+    -- The ID is encoded the same way as the length, however, we don't want
+    -- to remove the length bits from the ID value or intepret it as an
+    -- unsigned int since all of the documentation online references the IDs in
+    -- encoded form.
+    local _, id_length = ebml_length(chars:sub(1, 4))
+    local ebml_id = chars:sub(1, id_length)
+
+    local remaining = chars:sub(id_length + 1, id_length + 8)
+    local element_length, used_bytes = ebml_length(remaining)
+
+    return ebml_id, element_length, id_length + used_bytes
+end
+
+
+-- Should accept 8+ bytes, will return the data length plus the number of bytes
+-- that were used to hold the data length.
+function ebml_length(chars)
+    -- We substring chars to ensure we don't build a huge table we don't need
+    local bit_tables = string_to_bit_table(chars:sub(1, 8))
+
+    local value_length = 1
+    for i=1, #bit_tables[1] do
+        if bit_tables[1][i] == 0 then
+            value_length = value_length + 1
+        else
+            -- Clear the indicator bit so the rest of the byte
+            bit_tables[1][i] = 0
+            break
+        end
+    end
+
+    local bits = {}
+    for i=1, value_length do
+        table.insert(bits, table.concat(bit_tables[i]))
+    end
+
+    return tonumber(table.concat(bits), 2), value_length
+end
+
+
+function binary_tests(content, ext)
+    local length = #content
+    local _1_8   = content:sub(1, 8)
+    local _1_7   = content:sub(1, 7)
+    local _1_6   = content:sub(1, 6)
+    local _1_5   = content:sub(1, 5)
+    local _1_4   = content:sub(1, 4)
+    local _1_3   = content:sub(1, 3)
+    local _1_2   = content:sub(1, 2)
+    local _9_12  = content:sub(9, 12)
+
+
+    -- Images
+    if _1_4 == '\xC5\xD0\xD3\xC6' then
+        -- With a Windows-format EPS, the file starts right after a 30-byte
+        -- header, or a 30-byte header followed by two bytes of padding
+        if content:sub(33, 42) == '%!PS-Adobe' or content:sub(31, 40) == '%!PS-Adobe' then
+            return 'application/postscript'
+        end
+    end
+
+    if _1_8 == '%!PS-Ado' and content:sub(9, 10) == 'be' then
+        return 'application/postscript'
+    end
+
+    if _1_4 == 'MM\x00*' or _1_4 == 'II*\x00' then
+        return 'image/tiff'
+    end
+
+    if _1_8 == '\x89PNG\r\n\x1A\n' then
+        return 'image/png'
+    end
+
+    if _1_6 == 'GIF87a' or _1_6 == 'GIF89a' then
+        return 'image/gif'
+    end
+
+    if _1_4 == 'RIFF' and _9_12 == 'WEBP' then
+        return 'image/webp'
+    end
+
+    if _1_2 == 'BM' and length > 14 and in_table(content:sub(15, 15), {'\x0C', '(', '@', '\x80'}) then
+        return 'image/x-ms-bmp'
+    end
+
+    local normal_jpeg    = length > 10 and in_table(content:sub(7, 10), {'JFIF', 'Exif'})
+    local photoshop_jpeg = length > 24 and _1_4 == '\xFF\xD8\xFF\xED' and content:sub(21, 24) == '8BIM'
+    if normal_jpeg or photoshop_jpeg then
+        return 'image/jpeg'
+    end
+
+    if _1_4 == '8BPS' then
+        return 'image/vnd.adobe.photoshop'
+    end
+
+    if _1_8 == '\x00\x00\x00\x0CjP  ' and _9_12 == '\r\n\x87\n' then
+        return 'image/jp2'
+    end
+
+    if _1_4 == '\x00\x00\x01\x00' then
+        return 'application/vnd.microsoft.icon'
+    end
+
+
+    -- Audio/Video
+    if _1_4 == '\x1AE\xDF\xA3' and length > 1000 then
+        local mimetype, err = ebml_parse(content)
+
+        if mimetype then
+            return mimetype
+        end
+    end
+
+    if _1_4 == 'MOVI' then
+        if in_table(content:sub(5, 8), {'moov', 'mdat'}) then
+            return 'video/quicktime'
+        end
+    end
+
+    if length > 8 and content:sub(5, 8) == 'ftyp' then
+        local lower_9_12 = _9_12:lower()
+
+        if in_table(lower_9_12, {'avc1', 'isom', 'iso2', 'mp41', 'mp42', 'mmp4', 'ndsc', 'ndsh', 'ndsm', 'ndsp', 'ndss', 'ndxc', 'ndxh', 'ndxm', 'ndxp', 'ndxs', 'f4v ', 'f4p ', 'm4v '}) then
+            return 'video/mp4'
+        end
+
+        if in_table(lower_9_12, {'msnv', 'ndas', 'f4a ', 'f4b ', 'm4a ', 'm4b ', 'm4p '}) then
+            return 'audio/mp4'
+        end
+
+        if in_table(lower_9_12, {'3g2a', '3g2b', '3g2c', 'kddi'}) then
+            return 'video/3gpp2'
+        end
+
+        if in_table(lower_9_12, {'3ge6', '3ge7', '3gg6', '3gp1', '3gp2', '3gp3', '3gp4', '3gp5', '3gp6', '3gs7'}) then
+            return 'video/3gpp'
+        end
+
+        if lower_9_12 == 'mqt ' or lower_9_12 == 'qt  ' then
+            return 'video/quicktime'
+        end
+
+        if lower_9_12 == 'jp2 ' then
+            return 'image/jp2'
+        end
+    end
+
+    -- MP3
+    if bitwise_and(_1_2, '\xFF\xF6') == '\xFF\xF2' then
+        local byte_3 = content:sub(3, 3)
+        if bitwise_and(byte_3, '\xF0') ~= '\xF0' and bitwise_and(byte_3, "\x0C") ~= "\x0C" then
+            return 'audio/mpeg'
+        end
+    end
+    if _1_3 == 'ID3' then
+        return 'audio/mpeg'
+    end
+
+    if _1_4 == 'fLaC' then
+        return 'audio/x-flac'
+    end
+
+    if _1_8 == '0&\xB2u\x8Ef\xCF\x11' then
+        -- Without writing a full-on ASF parser, we can just scan for the
+        -- UTF-16 string "AspectRatio"
+        if content:find('\x00A\x00s\x00p\x00e\x00c\x00t\x00R\x00a\x00t\x00i\x00o', 1, true) then
+            return 'video/x-ms-wmv'
+        end
+        return 'audio/x-ms-wma'
+    end
+
+    if _1_4 == 'RIFF' and _9_12 == 'AVI ' then
+        return 'video/x-msvideo'
+    end
+
+    if _1_4 == 'RIFF' and _9_12 == 'WAVE' then
+        return 'audio/x-wav'
+    end
+
+    if _1_4 == 'FORM' and _9_12 == 'AIFF' then
+        return 'audio/x-aiff'
+    end
+
+    if _1_4 == 'OggS' then
+        local _29_33 = content:sub(29, 33)
+        if _29_33 == '\x01vorb' then
+            return 'audio/vorbis'
+        end
+        if _29_33 == '\x07FLAC' then
+            return 'audio/x-flac'
+        end
+        if _29_33 == 'OpusH' then
+            return 'audio/ogg'
+        end
+        -- Theora and OGM
+        if _29_33 == '\x80theo' or _29_33 == 'vide' then
+            return 'video/ogg'
+        end
+    end
+
+    if _1_3 == 'FWS' or _1_3 == 'CWS' then
+        return 'application/x-shockwave-flash'
+    end
+
+    if _1_3 == 'FLV' then
+        return 'video/x-flv'
+    end
+
+
+    if _1_5 == '%PDF-' then
+        return 'application/pdf'
+    end
+
+    if _1_5 == '{\\rtf' then
+        return 'text/rtf'
+    end
+
+
+    -- Office '97-2003 formats
+    if _1_8 == '\xD0\xCF\x11\xE0\xA1\xB1\x1A\xE1' then
+        if in_table(ext, {'xls', 'csv', 'tab'}) then
+            return 'application/vnd.ms-excel'
+        end
+        if ext == 'ppt' then
+            return 'application/vnd.ms-powerpoint'
+        end
+        -- We default to word since we need something if the extension isn't recognized
+        return 'application/msword'
+    end
+
+    if _1_8 == '\x09\x04\x06\x00\x00\x00\x10\x00' then
+        return 'application/vnd.ms-excel'
+    end
+
+    if _1_6 == '\xDB\xA5\x2D\x00\x00\x00' or _1_5 == '\x50\x4F\x5E\x51\x60' or _1_4 == '\xFE\x37\x00\x23' or _1_3 == '\x94\xA6\x2E' then
+        return 'application/msword'
+    end
+
+    if _1_4 == 'PK\x03\x04' then
+        -- Office XML formats
+        if ext == 'xlsx' then
+            return 'application/vnd.ms-excel'
+        end
+
+        if ext == 'pptx' then
+            return 'application/vnd.ms-powerpoint'
+        end
+
+        if ext == 'docx' then
+            return 'application/msword'
+        end
+
+        -- Open Office formats
+        if ext == 'ods' then
+            return 'application/vnd.oasis.opendocument.spreadsheet'
+        end
+
+        if ext == 'odp' then
+            return 'application/vnd.oasis.opendocument.presentation'
+        end
+
+        if ext == 'odt' then
+            return 'application/vnd.oasis.opendocument.text'
+        end
+
+        -- iWork - some programs like Mac Mail change the filename to
+        -- .numbers.zip, etc
+        if ext == 'pages' or ext == 'pages.zip' then
+          return 'application/vnd.apple.pages'
+        end
+        if ext == 'key' or ext == 'key.zip' then
+            return 'application/vnd.apple.keynote'
+        end
+        if ext == 'numbers' or ext == 'numbers.zip' then
+            return 'application/vnd.apple.numbers'
+        end
+
+        -- Otherwise just a zip
+        return 'application/zip'
+    end
+
+
+    -- Archives
+    if length > 257 then
+        if content:sub(258, 263) == 'ustar\x00' then
+            return 'application/x-tar'
+        end
+        if content:sub(258, 265) == 'ustar\x40\x40\x00' then
+            return 'application/x-tar'
+        end
+    end
+
+    if _1_7 == 'Rar!\x1A\x07\x00' or _1_8 == 'Rar!\x1A\x07\x01\x00' then
+        return 'application/x-rar-compressed'
+    end
+
+    if _1_2 == '\x1F\x9D' then
+        return 'application/x-compress'
+    end
+
+    if _1_2 == '\x1F\x8B' then
+        return 'application/x-gzip'
+    end
+
+    if _1_3 == 'BZh' then
+        return 'application/x-bzip2'
+    end
+
+    if _1_6 == '\xFD7zXZ\x00' then
+        return 'application/x-xz'
+    end
+
+    if _1_6 == '7z\xBC\xAF\x27\x1C' then
+        return 'application/x-7z-compressed'
+    end
+
+    if _1_2 == 'MZ' then
+        local pe_header_start = unpack_le(content:sub(61, 64))
+        local signature = content:sub(pe_header_start + 1, pe_header_start + 4)
+
+        if signature == 'PE\x00\x00' then
+            local image_file_header_start = pe_header_start + 5
+            local characteristics = content:sub(image_file_header_start + 18, image_file_header_start + 19)
+            local is_dll = bitwise_and(characteristics, '\x20\x00') == '\x20\x00'
+
+            if is_dll then
+                return 'application/x-msdownload'
+            end
+
+            return 'application/octet-stream'
+        end
+    end
+
+    return nil
+end
+
+
+function text_tests(content)
+    local lower_content = content:lower()
+
+    if content:find('^%%!PS-Adobe') then
+        return 'application/postscript'
+    end
+
+    if lower_content:find('<?php', 1, true) or content:find('<?=', 1, true) then
+        return 'application/x-httpd-php'
+    end
+
+    if lower_content:find('^%s*<%?xml') then
+        if content:find('<svg') then
+            return 'image/svg+xml'
+        end
+        if lower_content:find('<!doctype html') then
+            return 'application/xhtml+xml'
+        end
+        if content:find('<rss') then
+            return 'application/rss+xml'
+        end
+        return 'application/xml'
+    end
+
+    if lower_content:find('^%s*<html') or lower_content:find('^%s*<!doctype') then
+        return 'text/html'
+    end
+
+    if lower_content:find('^#![/a-z0-9]+ ?python') then
+        return 'application/x-python'
+    end
+
+    if lower_content:find('^#![/a-z0-9]+ ?perl') then
+        return 'application/x-perl'
+    end
+
+    if lower_content:find('^#![/a-z0-9]+ ?ruby') then
+        return 'application/x-ruby'
+    end
+
+    if lower_content:find('^#![/a-z0-9]+ ?php') then
+        return 'application/x-httpd-php'
+    end
+
+    if lower_content:find('^#![/a-z0-9]+ ?bash') then
+        return 'text/x-shellscript'
+    end
+
+    return nil
+end
+
+
+local ext_map = {
+    css   = 'text/css',
+    csv   = 'text/csv',
+    htm   = 'text/html',
+    html  = 'text/html',
+    xhtml = 'text/html',
+    ics   = 'text/calendar',
+    js    = 'application/javascript',
+    php   = 'application/x-httpd-php',
+    php3  = 'application/x-httpd-php',
+    php4  = 'application/x-httpd-php',
+    php5  = 'application/x-httpd-php',
+    inc   = 'application/x-httpd-php',
+    pl    = 'application/x-perl',
+    cgi   = 'application/x-perl',
+    py    = 'application/x-python',
+    rb    = 'application/x-ruby',
+    rhtml = 'application/x-ruby',
+    rss   = 'application/rss+xml',
+    sh    = 'text/x-shellscript',
+    tab   = 'text/tab-separated-values',
+    vcf   = 'text/x-vcard',
+    xml   = 'application/xml'
+}
+
+function ext_tests(ext)
+    local mimetype = ext_map[ext]
+    if mimetype then
+        return mimetype
+    end
+    return 'text/plain'
+end
+
+
+local _M = {}
+
+
+function _M.via_path(path, filename)
+    local f, err = io.open(path, 'r')
+    if not f then
+        return nil, err
+    end
+
+    local content = f:read(4096)
+    f:close()
+
+    if not filename then
+        filename = basename(path)
+    end
+
+    return _M.via_content(content, filename)
+end
+
+
+function _M.via_content(content, filename)
+    local ext = extension(filename)
+
+    -- If there are no low ASCII chars and no easily distinguishable tokens,
+    -- we need to detect by file extension
+
+    local mimetype = nil
+
+    mimetype = binary_tests(content, ext)
+    if mimetype then
+        return mimetype
+    end
+
+    -- Binary-looking files should have been detected so far
+    if content:find('[%z\x01-\x08\x0B\x0C\x0E-\x1F]') then
+        return 'application/octet-stream'
+    end
+
+    mimetype = text_tests(content)
+    if mimetype then
+        return mimetype
+    end
+
+    return ext_tests(ext)
+end
+
+return _M

_extensions/toc_lof/_extension.yml

@@ -0,0 +1,8 @@
+title: Toc_lof
+author: Javed
+version: 1.0.0
+quarto-required: ">=1.3.0"
+contributes:
+  filters:
+    - toc_lof.lua
+

_extensions/toc_lof/toc_lof.lua

@@ -0,0 +1,6 @@
+
+-- Reformat all heading text 
+function Header(el)
+  el.content = pandoc.Emph(el.content)
+  return el
+end