Make lam-alef ligature with kashida-ar + hamzaabove-ar

This is the Unicode-sanctioned way of encoding medial seat-less hamza.
aliftype · Sep 28, 2022 · 8d283a2 · 8d283a2
1 parent 85c922c
commit 8d283a2
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Showing 8 changed files with 18 additions and 10 deletions.
diff --git a/Amiri-Bold.ttf b/Amiri-Bold.ttf
diff --git a/Amiri-BoldSlanted.ttf b/Amiri-BoldSlanted.ttf
diff --git a/Amiri-Regular.ttf b/Amiri-Regular.ttf
diff --git a/Amiri-Slanted.ttf b/Amiri-Slanted.ttf
diff --git a/AmiriQuran.ttf b/AmiriQuran.ttf
diff --git a/AmiriQuranColored.ttf b/AmiriQuranColored.ttf
diff --git a/sources/contextuals.fea b/sources/contextuals.fea
@@ -155,6 +155,7 @@ lookup LamAlfFina {
 feature calt {
     lookupflag IgnoreMarks;
     sub [@aLam.medi]' lookup LamAlfFina [@aAlf.fina]' lookup LamAlfFina;
+    sub [@aLam.medi]' lookup LamAlfFina hamza-ar.float' [@aAlf.fina]' lookup LamAlfFina;
 } calt;
 
 lookup KafLamHeh {
@@ -311,8 +312,8 @@ lookup LamMemInit {
     sub @aLam.init by @aLam.init.LamMemInit;
     sub @aMem.medi by @aMem.medi.LamMemInit;
 } LamMemInit;
-
 #endif
+#
 lookup LamAlfIsol {
     sub @aAlf.fina by @aAlf.fina.LamAlfIsol;
     sub @aLam.init by @aLam.init.LamAlfIsol;
@@ -324,8 +325,8 @@ lookup LamHaaMemInit {
     sub @aLam.init by @aLam.init.LamHaaMemInit;
     sub @aMem.medi by @aMem.medi.LamHaaMemInit;
 } LamHaaMemInit;
-
 #endif
+#
 lookup BaaBaaMemInit {
     sub @aBaa.init by @aBaa.init.BaaBaaMemInit;
     sub @aBaa.medi by @aBaa.medi.BaaBaaMemInit;
@@ -601,6 +602,7 @@ feature calt {
     sub [@aLam.init]' lookup LamMemInit [@aMem.medi]' lookup LamMemInit;
     #endif
     sub [@aLam.init]' lookup LamAlfIsol [@aAlf.fina]' lookup LamAlfIsol;
+    sub [@aLam.init]' lookup LamAlfIsol hamza-ar.float' [@aAlf.fina]' lookup LamAlfIsol;
     #ifndef QURAN
     sub [@aLam.init]' lookup LamHaaMemInit [@aHaa.medi]' lookup LamHaaMemInit [@aMem.medi]' lookup LamHaaMemInit;
     #endif
@@ -617,8 +619,7 @@ feature calt {
     sub [@aBaa.init]' lookup BaaNonIsol [@aNon.fina]' lookup BaaNonIsol;
     sub [@aKaf.medi]' lookup KafMemFina [@aMem.fina]' lookup KafMemFina;
     sub [@aKaf.init @aKaf.medi]' lookup KafLam [@aLam.medi @aLam.medi.LamAlfFina]' lookup KafLamAlf [@aAlf.fina @aAlf.fina.LamAlfFina];
-    sub [@aKaf.init @aKaf.medi]' lookup KafLam [@aLam.medi @aLam.medi.LamAlfFina]' lookup KafLamAlf hamza-ar.float' [@aAlf.fina @aAlf.fina.LamAlfFina];
-    # see float hamza in quran.fea
+    sub [@aKaf.init @aKaf.medi]' lookup KafLam [@aLam.medi @aLam.medi.LamAlfFina]' lookup KafLamAlf hamza-ar.float' [@aAlf.fina @aAlf.fina.LamAlfFina]; # see float hamza in quran.fea
     sub [@aBaa.init]' lookup BaaSenInit [@aSen.medi]' lookup BaaSenInit;
     sub [@aBaa.init]' lookup BaaSenAltInit [@aSen.fina]' lookup BaaSenInit;
     sub [@aKaf.medi]' lookup KafRaaFina [@aRaa.fina]' lookup KafRaaFina;

diff --git a/sources/quran.fea b/sources/quran.fea
@@ -18,10 +18,10 @@ feature ccmp {
 } ccmp;
 
 #
-# Floating hamza
+# Medial hamza
 #
 # Hamza should be shaping transparent, just like combining marks, while still
-# not a combining marks, I call t floating hamza because it "floats" between
+# not a combining marks, I call t medial hamza because it "floats" between
 # adjacent letters. When a hamza comes between two letters that would normally
 # join, it will be placed between them over a connecting stroke, else it will
 # just set on the baseline.
@@ -52,12 +52,13 @@ lookup After {
     sub @before.init by @before.medi;
 } After;
 
-lookup MedialHAmza {
+lookup MedialHamza {
     sub hamza-ar by hamza-ar.medi;
-} MedialHAmza;
+} MedialHamza;
 
 lookup FloatingHamza {
     sub hamza-ar by hamza-ar.float;
+    sub hamza-ar.medi by hamza-ar.float;
 } FloatingHamza;
 
 lookup LamAlefIsol {
@@ -77,10 +78,16 @@ feature calt {
     sub lam-ar' lookup LamAlefIsol hamza-ar' lookup FloatingHamza alef-ar' lookup LamAlefIsol;
     sub lam-ar.fina' lookup LamAlefFina hamza-ar' lookup FloatingHamza alef-ar' lookup LamAlefFina;
     # Medial hamza.
-    sub @before' lookup Before hamza-ar' lookup MedialHAmza @after' lookup After;
+    sub @before' lookup Before hamza-ar' lookup MedialHamza @after' lookup After;
 } calt;
 
-# kern floating hamza between final lam-alef to avoid glyph overlap
+# This is the Unicode-sanctioned way of lam-alef with medial hamza.
+feature ccmp {
+    lookupflag IgnoreMarks;
+    sub lam-ar hamza-ar.medi' lookup FloatingHamza alef-ar;
+} ccmp;
+
+# kern medial hamza between final lam-alef to avoid glyph overlap
 feature kern {
     lookupflag IgnoreMarks;
     pos hamza-ar.float @aAlf.fina.LamAlfFina <-146 0 0 0>;