From b821116421f0d942052ad225f4ea62aef2696817 Mon Sep 17 00:00:00 2001
From: Hans Hagen <pragma@wxs.nl>
Date: Mon, 13 Jul 2020 17:21:34 +0200
Subject: 2020-07-13 16:31:00

---
 tex/context/base/mkiv/toks-aux.lua | 88 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 tex/context/base/mkiv/toks-aux.lua

(limited to 'tex/context/base/mkiv/toks-aux.lua')

diff --git a/tex/context/base/mkiv/toks-aux.lua b/tex/context/base/mkiv/toks-aux.lua
new file mode 100644
index 000000000..1cfc13af3
--- /dev/null
+++ b/tex/context/base/mkiv/toks-aux.lua
@@ -0,0 +1,88 @@
+if not modules then modules = { } end modules ['toks-aux'] = {
+    version   = 1.001,
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+if CONTEXTLMTXMODE > 0 then
+
+    local type, tostring = type, tostring
+    local max = math.max
+    local formatters, gsub = string.formatters, string.gsub
+
+    interfaces.implement {
+        name      = "showluatokens",
+        public    = true,
+        protected = true,
+        actions   = function()
+            local f0 = formatters["%s: %s"]
+            local nl = logs.newline
+            local wr = logs.writer
+            local t  = token.peek_next() -- local t = token.scan_next() token.put_back(t)
+            local n  = ""
+            local w  = ""
+            local c  = t.cmdname
+            if c == "left_brace" then
+                w = "given token list"
+                t = token.scan_toks(false)
+            elseif c == "register_toks" then
+                token.scan_next()
+                w = "token register"
+                n = t.csname or t.index
+                t = tex.gettoks(n,true)
+            elseif c == "internal_toks" then
+                token.scan_next()
+                w = "internal token variable"
+                n = t.csname or t.index
+                t = tex.gettoks(n,true)
+            else
+                if t.protected then
+                    w = "protected control sequence"
+                else
+                    w = "control sequence"
+                end
+                n = token.scan_csname()
+                t = token.get_meaning(n,true)
+            end
+            wr(f0(w,n))
+            nl()
+            if type(t) == "table" then
+                local w1 = 4
+                local w2 = 1
+                local w3 = 3
+                local w4 = 3
+                for i=1,#t do
+                    local ti = t[i]
+                    w1 = max(w1,#tostring(ti.id))
+                    w2 = max(w2,#tostring(ti.command))
+                    w3 = max(w3,#tostring(ti.index))
+                    w4 = max(w4,#ti.cmdname)
+                end
+                local f1 = formatters["%" .. w1 .. "i  %" .. w2 .. "i  %" .. w3 .. "i  %-" .. w4 .. "s  %s"]
+                local f2 = formatters["%" .. w1 .. "i  %" .. w2 .. "i  %" .. w3 .. "i  %-" .. w4 .. "s"]
+                local f3 = formatters["%" .. w1 .. "i  %" .. w2 .. "i  %" .. w3 .. "i  %-" .. w4 .. "s  %C"]
+                for i=1,#t do
+                    local ti = t[i]
+                    local cs = ti.csname
+                    local id = ti.id
+                    local ix = ti.index
+                    local cd = ti.command
+                    local cn = gsub(ti.cmdname,"_"," ")
+                    if cs then
+                        wr(f1(id,cd,ix,cn,cs))
+                    elseif cn == "letter" or cn == "other_char" then
+                        wr(f3(id,cd,ix,cn,ix))
+                    else
+                        wr(f2(id,cd,ix,cn))
+                        if cn == "end_match" then
+                            wr("-------")
+                        end
+                    end
+                end
+                nl()
+            end
+        end
+    }
+
+end
-- 
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