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[gnome-font-viewer/wip/matthiasc/more-info: 6/6] Pull out the OpenType data

commit ca74d7e117d9733eaedffea97d4ba882314c8669
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Sep 16 19:06:02 2017 -0400

    Pull out the OpenType data
    
    This commit moves the OpenType feature tags list to a separate
    file that can more easily be shared with other users. It also
    completes the list to have all registered tags from the spec.

 src/font-view.c        |   82 ++-----------------------
 src/open-type-layout.h |  155 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 162 insertions(+), 75 deletions(-)
---
diff --git a/src/font-view.c b/src/font-view.c
index 67f5d57..edf94be 100644
--- a/src/font-view.c
+++ b/src/font-view.c
@@ -266,73 +266,13 @@ describe_instance (FT_Face face,
     g_free (str);
 }
 
-/* OpenType layout features. This list is incomplete. */
-static struct {
-  const char *tag;
-  const char *name;
-} named_features[] = {
-  { "aalt", N_("Access All Alternatives") },
-  { "ccmp", N_("Glyph Composition/Decomposition") },
-  { "dnom", N_("Denominators") },
-  { "numr", N_("Numerators") },
-  { "ordn", N_("Ordinals") },
-  { "mark", N_("Mark Positioning") },
-  { "mkmk", N_("Mark to Mark Positioning") },
-  { "rvrn", N_("Required Variation Alternates"), },
-  { "size", N_("Optical size"), },
-  { "opbd", N_("Optical Bounds"), },
-  { "lfbd", N_("Left Bounds"), },
-  { "rtbd", N_("Right Bounds"), },
-  { "rtlm", N_("Right-to-left mirrored forms"), },
-  { "mgrk", N_("Mathematical Greek") },
-  { "kern", N_("Kerning") },
-  { "liga", N_("Common Ligatures") },
-  { "dlig", N_("Discretionary Ligatures") },
-  { "hlig", N_("Historical Ligatures") },
-  { "clig", N_("Contextual Ligatures") },
-  { "smcp", N_("Small Caps") },
-  { "c2sc", N_("Small Caps from Caps") },
-  { "pcap", N_("Petite Caps") },
-  { "c2pc", N_("Caps to Petite Caps") },
-  { "unic", N_("Unicase") },
-  { "cpsp", N_("Capital Spacing") },
-  { "case", N_("Case-sensitive Forms") },
-  { "lnum", N_("Lining Numbers") },
-  { "onum", N_("Old-Style Numbers") },
-  { "pnum", N_("Proportional Numbers") },
-  { "tnum", N_("Tabular Numbers") },
-  { "frac", N_("Normal Fractions") },
-  { "afrc", N_("Alternate Fractions") },
-  { "zero", N_("Slashed Zero") },
-  { "nalt", N_("Alternative Annotations") },
-  { "sinf", N_("Scientific Inferiors") },
-  { "swsh", N_("Swash Glyphs") },
-  { "cswh", N_("Contextual Swash") },
-  { "locl", N_("Localized Forms") },
-  { "calt", N_("Contextual Alternatives") },
-  { "hist", N_("Historical Alternatives") },
-  { "salt", N_("Stylistic Alternatives") },
-  { "titl", N_("Titling Alternatives") },
-  { "rand", N_("Randomize") },
-  { "subs", N_("Subscript") },
-  { "sups", N_("Superscript") },
-  { "init", N_("Initial Forms") },
-  { "medi", N_("Medial Forms") },
-  { "fina", N_("Final Forms") },
-  { "isol", N_("Isolated Forms") },
-  { "ss01", N_("Stylistic Set 1") },
-  { "ss02", N_("Stylistic Set 2") },
-  { "ss03", N_("Stylistic Set 3") },
-  { "ss04", N_("Stylistic Set 4") },
-  { "ss05", N_("Stylistic Set 5") },
-  { "ss06", N_("Stylistic Set 6") },
-};
+#include "open-type-layout.h"
 
 static char *
 get_features (FT_Face face)
 {
     hb_font_t *hb_font;
-    int i, j;
+    int i, j, k;
     GString *s;
 
     s = g_string_new ("");
@@ -358,22 +298,14 @@ get_features (FT_Face face)
                                                     &count,
                                                     features);
             for (j = 0; j < count; j++) {
-                char buf[5];
-                const char *name;
-                int k;
-
-                hb_tag_to_string (features[j], buf); buf[4] = '\0';
-                name = buf;
-
-                for (k = 0; k < G_N_ELEMENTS (named_features); k++) {
-                    if (strcmp (named_features[k].tag, buf) == 0) {
-                        name = _(named_features[k].name);
+                for (k = 0; k < G_N_ELEMENTS (open_type_layout_features); k++) {
+                    if (open_type_layout_features[k].tag == features[j]) {
+                        if (s->len > 0)
+                            g_string_append (s, ", ");
+                        g_string_append (s, _(open_type_layout_features[k].name));
                         break;
                     }
                 }
-                if (s->len > 0)
-                    g_string_append (s, ", ");
-                g_string_append (s, name);
             }
         }
     }
diff --git a/src/open-type-layout.h b/src/open-type-layout.h
new file mode 100644
index 0000000..b09aed7
--- /dev/null
+++ b/src/open-type-layout.h
@@ -0,0 +1,155 @@
+/* Registered OpenType layout tags, see
+ * https://www.microsoft.com/typography/otspec/featuretags.htm
+ */
+
+typedef struct {
+  unsigned int tag;
+  const char *name;
+} NamedTag;
+
+#define MAKE_TAG(a,b,c,d) (unsigned int)(((a) << 24) | ((b) << 16) | ((c) <<  8) | (d))
+
+static NamedTag open_type_layout_featurs[] = {
+  { MAKE_TAG('a','a','l','t'), NC_("OpenType layout", "Access All Alternates") },
+  { MAKE_TAG('a','b','v','f'), NC_("OpenType layout", "Above-base Forms") },
+  { MAKE_TAG('a','b','v','m'), NC_("OpenType layout", "Above-base Mark Positioning") },
+  { MAKE_TAG('a','b','v','s'), NC_("OpenType layout", "Above-base Substitutions") },
+  { MAKE_TAG('a','f','r','c'), NC_("OpenType layout", "Alternative Fractions") },
+  { MAKE_TAG('a','k','h','n'), NC_("OpenType layout", "Akhands") },
+  { MAKE_TAG('b','l','w','f'), NC_("OpenType layout", "Below-base Forms") },
+  { MAKE_TAG('b','l','w','m'), NC_("OpenType layout", "Below-base Mark Positioning") },
+  { MAKE_TAG('b','l','w','s'), NC_("OpenType layout", "Below-base Substitutions") },
+  { MAKE_TAG('c','a','l','t'), NC_("OpenType layout", "Contextual Alternates") },
+  { MAKE_TAG('c','a','s','e'), NC_("OpenType layout", "Case-Sensitive Forms") },
+  { MAKE_TAG('c','c','m','p'), NC_("OpenType layout", "Glyph Composition / Decomposition") },
+  { MAKE_TAG('c','f','a','r'), NC_("OpenType layout", "Conjunct Form After Ro") },
+  { MAKE_TAG('c','j','c','t'), NC_("OpenType layout", "Conjunct Forms") },
+  { MAKE_TAG('c','l','i','g'), NC_("OpenType layout", "Contextual Ligatures") },
+  { MAKE_TAG('c','p','c','t'), NC_("OpenType layout", "Centered CJK Punctuation") },
+  { MAKE_TAG('c','p','s','p'), NC_("OpenType layout", "Capital Spacing") },
+  { MAKE_TAG('c','s','w','h'), NC_("OpenType layout", "Contextual Swash") },
+  { MAKE_TAG('c','u','r','s'), NC_("OpenType layout", "Cursive Positioning") },
+  { MAKE_TAG('c','2','p','c'), NC_("OpenType layout", "Petite Capitals From Capitals") },
+  { MAKE_TAG('c','2','s','c'), NC_("OpenType layout", "Small Capitals From Capitals") },
+  { MAKE_TAG('d','i','s','t'), NC_("OpenType layout", "Distances") },
+  { MAKE_TAG('d','l','i','g'), NC_("OpenType layout", "Discretionary Ligatures") },
+  { MAKE_TAG('d','n','o','m'), NC_("OpenType layout", "Denominators") },
+  { MAKE_TAG('d','t','l','s'), NC_("OpenType layout", "Dotless Forms") },
+  { MAKE_TAG('e','x','p','t'), NC_("OpenType layout", "Expert Forms") },
+  { MAKE_TAG('f','a','l','t'), NC_("OpenType layout", "Final Glyph on Line Alternates") },
+  { MAKE_TAG('f','i','n','2'), NC_("OpenType layout", "Terminal Forms #2") },
+  { MAKE_TAG('f','i','n','3'), NC_("OpenType layout", "Terminal Forms #3") },
+  { MAKE_TAG('f','i','n','a'), NC_("OpenType layout", "Terminal Forms") },
+  { MAKE_TAG('f','l','a','c'), NC_("OpenType layout", "Flattened accent forms") },
+  { MAKE_TAG('f','r','a','c'), NC_("OpenType layout", "Fractions") },
+  { MAKE_TAG('f','w','i','d'), NC_("OpenType layout", "Full Widths") },
+  { MAKE_TAG('h','a','l','f'), NC_("OpenType layout", "Half Forms") },
+  { MAKE_TAG('h','a','l','n'), NC_("OpenType layout", "Halant Forms") },
+  { MAKE_TAG('h','a','l','t'), NC_("OpenType layout", "Alternate Half Widths") },
+  { MAKE_TAG('h','i','s','t'), NC_("OpenType layout", "Historical Forms") },
+  { MAKE_TAG('h','k','n','a'), NC_("OpenType layout", "Horizontal Kana Alternates") },
+  { MAKE_TAG('h','l','i','g'), NC_("OpenType layout", "Historical Ligatures") },
+  { MAKE_TAG('h','n','g','l'), NC_("OpenType layout", "Hangul") },
+  { MAKE_TAG('h','o','j','o'), NC_("OpenType layout", "Hojo Kanji Forms") },
+  { MAKE_TAG('h','w','i','d'), NC_("OpenType layout", "Half Widths") },
+  { MAKE_TAG('i','n','i','t'), NC_("OpenType layout", "Initial Forms") },
+  { MAKE_TAG('i','s','o','l'), NC_("OpenType layout", "Isolated Forms") },
+  { MAKE_TAG('i','t','a','l'), NC_("OpenType layout", "Italics") },
+  { MAKE_TAG('j','a','l','t'), NC_("OpenType layout", "Justification Alternates") },
+  { MAKE_TAG('j','p','7','8'), NC_("OpenType layout", "JIS78 Forms") },
+  { MAKE_TAG('j','p','8','3'), NC_("OpenType layout", "JIS83 Forms") },
+  { MAKE_TAG('j','p','9','0'), NC_("OpenType layout", "JIS90 Forms") },
+  { MAKE_TAG('j','p','0','4'), NC_("OpenType layout", "JIS2004 Forms") },
+  { MAKE_TAG('k','e','r','n'), NC_("OpenType layout", "Kerning") },
+  { MAKE_TAG('l','f','b','d'), NC_("OpenType layout", "Left Bounds") },
+  { MAKE_TAG('l','i','g','a'), NC_("OpenType layout", "Standard Ligatures") },
+  { MAKE_TAG('l','j','m','o'), NC_("OpenType layout", "Leading Jamo Forms") },
+  { MAKE_TAG('l','n','u','m'), NC_("OpenType layout", "Lining Figures") },
+  { MAKE_TAG('l','o','c','l'), NC_("OpenType layout", "Localized Forms") },
+  { MAKE_TAG('l','t','r','a'), NC_("OpenType layout", "Left-to-right alternates") },
+  { MAKE_TAG('l','t','r','m'), NC_("OpenType layout", "Left-to-right mirrored forms") },
+  { MAKE_TAG('m','a','r','k'), NC_("OpenType layout", "Mark Positioning") },
+  { MAKE_TAG('m','e','d','2'), NC_("OpenType layout", "Medial Forms #2") },
+  { MAKE_TAG('m','e','d','i'), NC_("OpenType layout", "Medial Forms") },
+  { MAKE_TAG('m','g','r','k'), NC_("OpenType layout", "Mathematical Greek") },
+  { MAKE_TAG('m','k','m','k'), NC_("OpenType layout", "Mark to Mark Positioning") },
+  { MAKE_TAG('m','s','e','t'), NC_("OpenType layout", "Mark Positioning via Substitution") },
+  { MAKE_TAG('n','a','l','t'), NC_("OpenType layout", "Alternate Annotation Forms") },
+  { MAKE_TAG('n','l','c','k'), NC_("OpenType layout", "NLC Kanji Forms") },
+  { MAKE_TAG('n','u','k','t'), NC_("OpenType layout", "Nukta Forms") },
+  { MAKE_TAG('n','u','m','r'), NC_("OpenType layout", "Numerators") },
+  { MAKE_TAG('o','n','u','m'), NC_("OpenType layout", "Oldstyle Figures") },
+  { MAKE_TAG('o','p','b','d'), NC_("OpenType layout", "Optical Bounds") },
+  { MAKE_TAG('o','r','d','n'), NC_("OpenType layout", "Ordinals") },
+  { MAKE_TAG('o','r','n','m'), NC_("OpenType layout", "Ornaments") },
+  { MAKE_TAG('p','a','l','t'), NC_("OpenType layout", "Proportional Alternate Widths") },
+  { MAKE_TAG('p','c','a','p'), NC_("OpenType layout", "Petite Capitals") },
+  { MAKE_TAG('p','k','n','a'), NC_("OpenType layout", "Proportional Kana") },
+  { MAKE_TAG('p','n','u','m'), NC_("OpenType layout", "Proportional Figures") },
+  { MAKE_TAG('p','r','e','f'), NC_("OpenType layout", "Pre-Base Forms") },
+  { MAKE_TAG('p','r','e','s'), NC_("OpenType layout", "Pre-base Substitutions") },
+  { MAKE_TAG('p','s','t','f'), NC_("OpenType layout", "Post-base Forms") },
+  { MAKE_TAG('p','s','t','s'), NC_("OpenType layout", "Post-base Substitutions") },
+  { MAKE_TAG('p','w','i','d'), NC_("OpenType layout", "Proportional Widths") },
+  { MAKE_TAG('q','w','i','d'), NC_("OpenType layout", "Quarter Widths") },
+  { MAKE_TAG('r','a','n','d'), NC_("OpenType layout", "Randomize") },
+  { MAKE_TAG('r','c','l','t'), NC_("OpenType layout", "Required Contextual Alternates") },
+  { MAKE_TAG('r','k','r','f'), NC_("OpenType layout", "Rakar Forms") },
+  { MAKE_TAG('r','l','i','g'), NC_("OpenType layout", "Required Ligatures") },
+  { MAKE_TAG('r','p','h','f'), NC_("OpenType layout", "Reph Forms") },
+  { MAKE_TAG('r','t','b','d'), NC_("OpenType layout", "Right Bounds") },
+  { MAKE_TAG('r','t','l','a'), NC_("OpenType layout", "Right-to-left alternates") },
+  { MAKE_TAG('r','t','l','m'), NC_("OpenType layout", "Right-to-left mirrored forms") },
+  { MAKE_TAG('r','u','b','y'), NC_("OpenType layout", "Ruby Notation Forms") },
+  { MAKE_TAG('r','v','r','n'), NC_("OpenType layout", "Required Variation Alternates") },
+  { MAKE_TAG('s','a','l','t'), NC_("OpenType layout", "Stylistic Alternates") },
+  { MAKE_TAG('s','i','n','f'), NC_("OpenType layout", "Scientific Inferiors") },
+  { MAKE_TAG('s','i','z','e'), NC_("OpenType layout", "Optical size") },
+  { MAKE_TAG('s','m','c','p'), NC_("OpenType layout", "Small Capitals") },
+  { MAKE_TAG('s','m','p','l'), NC_("OpenType layout", "Simplified Forms") },
+  { MAKE_TAG('s','s','0','1'), NC_("OpenType layout", "Stylistic Set 1") },
+  { MAKE_TAG('s','s','0','2'), NC_("OpenType layout", "Stylistic Set 2") },
+  { MAKE_TAG('s','s','0','3'), NC_("OpenType layout", "Stylistic Set 3") },
+  { MAKE_TAG('s','s','0','4'), NC_("OpenType layout", "Stylistic Set 4") },
+  { MAKE_TAG('s','s','0','5'), NC_("OpenType layout", "Stylistic Set 5") },
+  { MAKE_TAG('s','s','0','6'), NC_("OpenType layout", "Stylistic Set 6") },
+  { MAKE_TAG('s','s','0','7'), NC_("OpenType layout", "Stylistic Set 7") },
+  { MAKE_TAG('s','s','0','8'), NC_("OpenType layout", "Stylistic Set 8") },
+  { MAKE_TAG('s','s','0','9'), NC_("OpenType layout", "Stylistic Set 9") },
+  { MAKE_TAG('s','s','1','0'), NC_("OpenType layout", "Stylistic Set 10") },
+  { MAKE_TAG('s','s','1','1'), NC_("OpenType layout", "Stylistic Set 11") },
+  { MAKE_TAG('s','s','1','2'), NC_("OpenType layout", "Stylistic Set 12") },
+  { MAKE_TAG('s','s','1','3'), NC_("OpenType layout", "Stylistic Set 13") },
+  { MAKE_TAG('s','s','1','4'), NC_("OpenType layout", "Stylistic Set 14") },
+  { MAKE_TAG('s','s','1','5'), NC_("OpenType layout", "Stylistic Set 15") },
+  { MAKE_TAG('s','s','1','6'), NC_("OpenType layout", "Stylistic Set 16") },
+  { MAKE_TAG('s','s','1','7'), NC_("OpenType layout", "Stylistic Set 17") },
+  { MAKE_TAG('s','s','1','8'), NC_("OpenType layout", "Stylistic Set 18") },
+  { MAKE_TAG('s','s','1','9'), NC_("OpenType layout", "Stylistic Set 19") },
+  { MAKE_TAG('s','s','2','0'), NC_("OpenType layout", "Stylistic Set 20") },
+  { MAKE_TAG('s','s','t','y'), NC_("OpenType layout", "Math script style alternates") },
+  { MAKE_TAG('s','t','c','h'), NC_("OpenType layout", "Stretching Glyph Decomposition") },
+  { MAKE_TAG('s','u','b','s'), NC_("OpenType layout", "Subscript") },
+  { MAKE_TAG('s','u','p','s'), NC_("OpenType layout", "Superscript") },
+  { MAKE_TAG('s','w','s','h'), NC_("OpenType layout", "Swash") },
+  { MAKE_TAG('t','i','t','l'), NC_("OpenType layout", "Titling") },
+  { MAKE_TAG('t','j','m','o'), NC_("OpenType layout", "Trailing Jamo Forms") },
+  { MAKE_TAG('t','n','a','m'), NC_("OpenType layout", "Traditional Name Forms") },
+  { MAKE_TAG('t','n','u','m'), NC_("OpenType layout", "Tabular Figures") },
+  { MAKE_TAG('t','r','a','d'), NC_("OpenType layout", "Traditional Forms") },
+  { MAKE_TAG('t','w','i','d'), NC_("OpenType layout", "Third Widths") },
+  { MAKE_TAG('u','n','i','c'), NC_("OpenType layout", "Unicase") },
+  { MAKE_TAG('v','a','l','t'), NC_("OpenType layout", "Alternate Vertical Metrics") },
+  { MAKE_TAG('v','a','t','u'), NC_("OpenType layout", "Vattu Variants") },
+  { MAKE_TAG('v','e','r','t'), NC_("OpenType layout", "Vertical Writing") },
+  { MAKE_TAG('v','h','a','l'), NC_("OpenType layout", "Alternate Vertical Half Metrics") },
+  { MAKE_TAG('v','j','m','o'), NC_("OpenType layout", "Vowel Jamo Forms") },
+  { MAKE_TAG('v','k','n','a'), NC_("OpenType layout", "Vertical Kana Alternates") },
+  { MAKE_TAG('v','k','r','n'), NC_("OpenType layout", "Vertical Kerning") },
+  { MAKE_TAG('v','p','a','l'), NC_("OpenType layout", "Proportional Alternate Vertical Metrics") },
+  { MAKE_TAG('v','r','t','2'), NC_("OpenType layout", "Vertical Alternates and Rotation") },
+  { MAKE_TAG('v','r','t','r'), NC_("OpenType layout", "Vertical Alternates for Rotation") },
+  { MAKE_TAG('z','e','r','o'), NC_("OpenType layout", "Slashed Zero") },
+};
+
+#undef MAKE_TAG
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