From 4f516d56e3e1d447e95676c1dd2c95362ed77840 Mon Sep 17 00:00:00 2001
From: Philipp Gesang <phg@phi-gamma.net>
Date: Sun, 29 Jan 2017 01:18:34 +0100
Subject: [fontloader] sync with Context as of 2017-01-29

---
 src/fontloader/misc/fontloader-font-oup.lua | 35 +++++++++++++++++++++++++----
 1 file changed, 31 insertions(+), 4 deletions(-)

(limited to 'src/fontloader/misc/fontloader-font-oup.lua')

diff --git a/src/fontloader/misc/fontloader-font-oup.lua b/src/fontloader/misc/fontloader-font-oup.lua
index c494573..cfa90c7 100644
--- a/src/fontloader/misc/fontloader-font-oup.lua
+++ b/src/fontloader/misc/fontloader-font-oup.lua
@@ -29,7 +29,12 @@ local f_index           = formatters["I%05X"]
 local f_character_y     = formatters["%C"]
 local f_character_n     = formatters["[ %C ]"]
 
-local doduplicates      = true -- can become an option (pseudo feature)
+local check_duplicates  = true  -- can become an option (pseudo feature) / aways needed anyway
+local check_soft_hyphen = false -- can become an option (pseudo feature) / needed for tagging
+
+directives.register("otf.checksofthyphen",function(v)
+    check_soft_hyphen = v
+end)
 
 local function replaced(list,index,replacement)
     if type(list) == "number" then
@@ -106,7 +111,7 @@ local function unifyresources(fontdata,indices)
     --
     local done = { } -- we need to deal with shared !
     --
-    local duplicates = doduplicates and resources.duplicates
+    local duplicates = check_duplicates and resources.duplicates
     if duplicates and not next(duplicates) then
         duplicates = false
     end
@@ -359,12 +364,34 @@ local function unifyresources(fontdata,indices)
 end
 
 local function copyduplicates(fontdata)
-    if doduplicates then
+    if check_duplicates then
         local descriptions = fontdata.descriptions
         local resources    = fontdata.resources
         local duplicates   = resources.duplicates
+        if check_soft_hyphen then
+            -- ebgaramond has a zero width empty soft hyphen
+            local ds = descriptions[0xAD]
+            if not ds or ds.width == 0 then
+                if ds then
+                    descriptions[0xAD] = nil
+                    report("patching soft hyphen")
+                else
+                    report("adding soft hyphen")
+                end
+                if not duplicates then
+                    duplicates = { }
+                    resources.duplicates = duplicates
+                end
+                local dh = duplicates[0x2D]
+                if dh then
+                    dh[#dh+1] = { [0xAD] = true }
+                else
+                    duplicates[0x2D] = { [0xAD] = true }
+                end
+            end
+        end
         if duplicates then
-            for u, d in next, duplicates do
+           for u, d in next, duplicates do
                 local du = descriptions[u]
                 if du then
                     local t = { f_character_y(u), "@", f_index(du.index), "->" }
-- 
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