1 files changed, 82 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/symb-emj.lua b/tex/context/base/mkiv/symb-emj.lua
new file mode 100644
index 000000000..3075e0985
--- /dev/null
+++ b/tex/context/base/mkiv/symb-emj.lua
@@ -0,0 +1,82 @@
+if not modules then modules = { } end modules ['symb-emj'] = {
+    version   = 1.001,
+    comment   = "companion to symb-emj.mkiv",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+local symbols        = fonts.symbols
+
+-- emoji
+
+-- processors.hpack_filter does it all
+
+local resolvedemoji   = characters.emoji.resolve
+local processfeatures = fonts.handlers.otf.featuresprocessor
+local injectspacing   = nodes.injections.handler
+local protectglyphs   = nodes.handlers.protectglyphs
+local tonodes         = nodes.tonodes
+local currentfont     = font.current
+
+-- fast enough, no need to memoize
+
+local glyph_code   = nodes.nodecodes.glyph
+local remove_node  = nodes.remove
+local getid        = nodes.getid
+local getnext      = nodes.getnext
+local getchar      = nodes.getchar
+
+local function removemodifiers(head)
+    local current = head
+    while current do
+        if getid(current) == glyph_code then
+            local char = getchar(current) -- using categories is too much
+            if char == 0x200D or (char >= 0x1F3FB and char <= 0x1F3FF) then
+                head, current = remove_node(head,current,true)
+            else
+                current = getnext(current)
+            end
+        else
+            current = getnext(current)
+        end
+    end
+    return head
+end
+
+-- attributes
+
+local function checkedemoji(name,id)
+    local str = resolvedemoji(name)
+    if str then
+        if not id then
+            id = currentfont()
+        end
+        local head = tonodes(str,id,nil,nil,true) -- use current attributes
+        head = processfeatures(head,id,false)
+        if head then
+            head = injectspacing(head)
+            protectglyphs(head)
+            return removemodifiers(head)
+        end
+    end
+end
+
+symbols.emoji = {
+    resolved = resolvedemoji,
+    checked  = checkedemoji,
+}
+
+interfaces.implement {
+    name      = "resolvedemoji",
+    actions   = { resolvedemoji, context.escaped },
+    arguments = "string",
+}
+
+interfaces.implement {
+    name      = "checkedemoji",
+    actions   = { checkedemoji, context },
+    arguments = "string",
+}
+
+