2016-01-12 16:26:00

1 files changed, 44 insertions, 0 deletions

diff --git a/tex/context/base/mkiv/spac-hor.lua b/tex/context/base/mkiv/spac-hor.lua
new file mode 100644
index 000000000..5d5a43e31
--- /dev/null
+++ b/tex/context/base/mkiv/spac-hor.lua
@@ -0,0 +1,44 @@
+if not modules then modules = { } end modules ['spac-hor'] = {
+    version   = 1.001,
+    comment   = "companion to spac-hor.mkiv",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+local utfbyte = utf.byte
+local lpegmatch, P, C = lpeg.match, lpeg.P, lpeg.C
+
+local context  = context
+
+local chardata = characters.data
+
+local p_check  = P("the ") * (P("letter") + P("character")) * P(" ") * lpeg.patterns.utf8byte -- is a capture already
+
+local can_have_space = table.tohash {
+    "lu", "ll", "lt", "lm", "lo", -- letters
+ -- "mn", "mc", "me",             -- marks
+    "nd", "nl", "no",             -- numbers
+    "ps", "pi",                   -- initial
+ -- "pe", "pf",                   -- final
+ -- "pc", "pd", "po",             -- punctuation
+    "sm", "sc", "sk", "so",       -- symbols
+ -- "zs", "zl", "zp",             -- separators
+ -- "cc", "cf", "cs", "co", "cn", -- others
+}
+
+local function autonextspace(str) -- todo: make a real not intrusive lookahead
+    local b = lpegmatch(p_check,str)
+    if b then
+        local d = chardata[b]
+        if d and can_have_space[d.category] then
+            context.space()
+        end
+    end
+end
+
+interfaces.implement {
+    name      = "autonextspace",
+    actions   = autonextspace,
+    arguments = "string",
+}