Add FC_DESKTOP_NAME property

To allow users to have desktop-specific matching rule.

4 files changed, 68 insertions, 12 deletions

diff --git a/src/fcdefault.c b/src/fcdefault.c
index a9a3b72..6995216 100644
--- a/src/fcdefault.c
+++ b/src/fcdefault.c
@@ -211,28 +211,73 @@ retry:
     return prgname;
 }
 
+static FcChar8 *default_desktop_name;
+
+FcChar8 *
+FcGetDesktopName (void)
+{
+    FcChar8 *desktop_name;
+retry:
+    desktop_name = fc_atomic_ptr_get (&default_desktop_name);
+    if (!desktop_name)
+    {
+	char *s = getenv ("XDG_CURRENT_DESKTOP");
+
+	if (!s)
+	    desktop_name = FcStrdup ("");
+	else
+	    desktop_name = FcStrdup (s);
+	if (!desktop_name)
+	{
+	    fprintf (stderr, "Fontconfig error: out of memory in %s\n",
+		     __FUNCTION__);
+	    return NULL;
+	}
+
+	if (!fc_atomic_ptr_cmpexch(&default_desktop_name, NULL, desktop_name))
+	{
+	    free (desktop_name);
+	    goto retry;
+	}
+    }
+    if (desktop_name && !desktop_name[0])
+	return NULL;
+
+    return desktop_name;
+}
+
 void
 FcDefaultFini (void)
 {
     FcChar8  *lang;
     FcStrSet *langs;
     FcChar8  *prgname;
+    FcChar8  *desktop;
 
     lang = fc_atomic_ptr_get (&default_lang);
-    if (lang && fc_atomic_ptr_cmpexch (&default_lang, lang, NULL)) {
+    if (lang && fc_atomic_ptr_cmpexch (&default_lang, lang, NULL))
+    {
 	free (lang);
     }
 
     langs = fc_atomic_ptr_get (&default_langs);
-    if (langs && fc_atomic_ptr_cmpexch (&default_langs, langs, NULL)) {
+    if (langs && fc_atomic_ptr_cmpexch (&default_langs, langs, NULL))
+    {
 	FcRefInit (&langs->ref, 1);
 	FcStrSetDestroy (langs);
     }
 
     prgname = fc_atomic_ptr_get (&default_prgname);
-    if (prgname && fc_atomic_ptr_cmpexch (&default_prgname, prgname, NULL)) {
+    if (prgname && fc_atomic_ptr_cmpexch (&default_prgname, prgname, NULL))
+    {
 	free (prgname);
     }
+
+    desktop = fc_atomic_ptr_get (&default_desktop_name);
+    if (desktop && fc_atomic_ptr_cmpexch(&default_desktop_name, desktop, NULL))
+    {
+	free (desktop);
+    }
 }
 
 void
@@ -336,6 +381,13 @@ FcDefaultSubstitute (FcPattern *pattern)
 	    FcPatternObjectAddString (pattern, FC_PRGNAME_OBJECT, prgname);
     }
 
+    if (FcPatternObjectGet (pattern, FC_DESKTOP_NAME_OBJECT, 0, &v) == FcResultNoMatch)
+    {
+	FcChar8 *desktop = FcGetDesktopName ();
+	if (desktop)
+	    FcPatternObjectAddString (pattern, FC_DESKTOP_NAME_OBJECT, desktop);
+    }
+
     if (!FcPatternFindObjectIter (pattern, &iter, FC_ORDER_OBJECT))
 	FcPatternObjectAddInteger (pattern, FC_ORDER_OBJECT, 0);
 }
diff --git a/src/fcint.h b/src/fcint.h
index c615b66..78cee54 100644
--- a/src/fcint.h
+++ b/src/fcint.h
@@ -199,7 +199,7 @@ typedef struct _FcValueList {
 } FcValueList;
 
 #define FcValueListNext(vl)	FcPointerMember(vl,next,FcValueList)
-			
+
 typedef int FcObject;
 
 /* The 1024 is to leave some room for future added internal objects, such
@@ -238,7 +238,7 @@ struct _FcPattern {
 						      FcFontSetFonts(fs)[i], \
 						      FcPattern) : \
 				 fs->fonts[i])
-						
+
 typedef enum _FcOp {
     FcOpInteger, FcOpDouble, FcOpString, FcOpMatrix, FcOpRange, FcOpBool, FcOpCharSet, FcOpLangSet,
     FcOpNil,
@@ -909,6 +909,9 @@ FcGetDefaultLang (void);
 FcPrivate FcChar8 *
 FcGetPrgname (void);
 
+FcPrivate FcChar8 *
+FcGetDesktopName (void);
+
 FcPrivate void
 FcDefaultFini (void);
 
diff --git a/src/fcobjs.h b/src/fcobjs.h
index acc0471..1cd8ed3 100644
--- a/src/fcobjs.h
+++ b/src/fcobjs.h
@@ -74,4 +74,5 @@ FC_OBJECT (FONT_VARIATIONS,	FcTypeString,	NULL)
 FC_OBJECT (VARIABLE,		FcTypeBool,	FcCompareBool)
 FC_OBJECT (FONT_HAS_HINT,	FcTypeBool,	FcCompareBool)
 FC_OBJECT (ORDER,		FcTypeInteger,	FcCompareNumber)
+FC_OBJECT (DESKTOP_NAME,	FcTypeString,	NULL)
 /* ^-------------- Add new objects here. */
diff --git a/src/fcxml.c b/src/fcxml.c
index 82a46f2..74c892d 100644
--- a/src/fcxml.c
+++ b/src/fcxml.c
@@ -367,7 +367,7 @@ typedef enum _FcElement {
     FcElementDescription,
     FcElementRemapDir,
     FcElementResetDirs,
-	
+
     FcElementRescan,
 
     FcElementPrefer,
@@ -731,7 +731,7 @@ FcTypecheckExpr (FcConfigParse *parse, FcExpr *expr, FcType type)
 	    if (o)
 		FcTypecheckValue (parse, o->type, type);
 	}
-        else
+	else
             FcConfigMessage (parse, FcSevereWarning,
                              "invalid constant used : %s",
                              expr->u.constant);
@@ -794,7 +794,7 @@ FcTestCreate (FcConfigParse *parse,
     if (test)
     {
 	const FcObjectType	*o;
-	
+
 	test->kind = kind;
 	test->qual = qual;
 	test->object = FcObjectFromName ((const char *) field);
@@ -1533,7 +1533,7 @@ FcStrtod (char *s, char **end)
     {
 	char	buf[128];
 	int	slen = strlen (s);
-	
+
 	if (slen + dlen > (int) sizeof (buf))
 	{
 	    if (end)
@@ -3101,7 +3101,7 @@ FcParsePattern (FcConfigParse *parse)
 	FcConfigMessage (parse, FcSevereError, "out of memory");
 	return;
     }
-	
+
     while ((vstack = FcVStackPeek (parse)))
     {
 	switch ((int) vstack->tag) {
@@ -3176,7 +3176,7 @@ FcEndElement(void *userData, const XML_Char *name FC_UNUSED)
     case FcElementRescan:
 	FcParseRescan (parse);
 	break;
-	
+
     case FcElementPrefer:
 	FcParseFamilies (parse, FcVStackPrefer);
 	break;
@@ -3512,7 +3512,7 @@ FcConfigParseAndLoadFromMemoryInternal (FcConfig       *config,
     XML_SetDoctypeDeclHandler (p, FcStartDoctypeDecl, FcEndDoctypeDecl);
     XML_SetElementHandler (p, FcStartElement, FcEndElement);
     XML_SetCharacterDataHandler (p, FcCharacterData);
-	
+
 #endif /* ENABLE_LIBXML2 */
 
 #ifndef ENABLE_LIBXML2