From c4ab52dcb5d016d18fc73a8577daeb6938fb9e84 Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Thu, 13 Feb 2003 16:42:38 +0000
Subject: [PATCH] Track dirs containing fonts.cache files referenced from
 ~/.fonts.cache file

---
 src/fccache.c | 45 ++++++++++++++++++++++++++++++++++++++-------
 src/fcdir.c   |  3 +++
 src/fcint.h   |  4 ++++
 3 files changed, 45 insertions(+), 7 deletions(-)

diff --git a/src/fccache.c b/src/fccache.c
index 4416412..aff1453 100644
--- a/src/fccache.c
+++ b/src/fccache.c
@@ -427,13 +427,29 @@ static FcGlobalCacheInfo *
 FcGlobalCacheDirAdd (FcGlobalCache  *cache,
 		     const FcChar8  *dir,
 		     time_t	    time,
-		     FcBool	    replace)
+		     FcBool	    replace,
+		     FcBool	    create_missing)
 {
     FcGlobalCacheDir	*d;
     FcFilePathInfo	i;
     FcGlobalCacheSubdir	*subdir;
     FcGlobalCacheDir	*parent;
 
+    i = FcFilePathInfoGet (dir);
+    parent = FcGlobalCacheDirGet (cache, i.dir, i.dir_len, create_missing);
+    /*
+     * Tricky here -- directories containing fonts.cache-1 files
+     * need entries only when the parent doesn't have a cache file.
+     * That is, when the parent already exists in the cache, is
+     * referenced and has a "real" timestamp.  The time of 0 is
+     * special and marks directories which got stuck in the
+     * global cache for this very reason.  Yes, it could
+     * use a separate boolean field, and probably should.
+     */
+    if (!parent || (!create_missing && 
+		    (!parent->info.referenced ||
+		    (parent->info.time == 0))))
+	return 0;
     /*
      * Add this directory to the cache
      */
@@ -441,13 +457,9 @@ FcGlobalCacheDirAdd (FcGlobalCache  *cache,
     if (!d)
 	return 0;
     d->info.time = time;
-    i = FcFilePathInfoGet (dir);
     /*
      * Add this directory to the subdirectory list of the parent
      */
-    parent = FcGlobalCacheDirGet (cache, i.dir, i.dir_len, FcTrue);
-    if (!parent)
-	return 0;
     subdir = malloc (sizeof (FcGlobalCacheSubdir));
     if (!subdir)
 	return 0;
@@ -484,6 +496,25 @@ FcGlobalCacheDirDestroy (FcGlobalCacheDir *d)
     free (d);
 }
 
+/*
+ * If the parent is in the global cache and referenced, add
+ * an entry for 'dir' to the global cache.  This is used
+ * for directories with fonts.cache files
+ */
+
+void
+FcGlobalCacheReferenceSubdir (FcGlobalCache *cache,
+			      const FcChar8 *dir)
+{
+    FcGlobalCacheInfo	*info;
+    info = FcGlobalCacheDirAdd (cache, dir, 0, FcFalse, FcFalse);
+    if (info && !info->referenced)
+    {
+	info->referenced = FcTrue;
+	cache->referenced++;
+    }
+}
+
 /*
  * Check to see if the global cache contains valid data for 'dir'.
  * If so, scan the global cache for files and directories in 'dir'.
@@ -739,7 +770,7 @@ FcGlobalCacheLoad (FcGlobalCache    *cache,
 	if (FcDebug () & FC_DBG_CACHEV)
 	    printf ("FcGlobalCacheLoad \"%s\" \"%20.20s\"\n", file, name);
 	if (!FcStrCmp (name, FC_FONT_FILE_DIR))
-	    info = FcGlobalCacheDirAdd (cache, file, time, FcFalse);
+	    info = FcGlobalCacheDirAdd (cache, file, time, FcFalse, FcTrue);
 	else
 	    info = FcGlobalCacheFileAdd (cache, file, id, time, name, FcFalse);
 	if (!info)
@@ -779,7 +810,7 @@ FcGlobalCacheUpdate (FcGlobalCache  *cache,
 	return FcFalse;
     if (S_ISDIR (statb.st_mode))
 	info = FcGlobalCacheDirAdd (cache, file, statb.st_mtime, 
-				   FcTrue);
+				    FcTrue, FcTrue);
     else
 	info = FcGlobalCacheFileAdd (cache, file, id, statb.st_mtime, 
 				    name, FcTrue);
diff --git a/src/fcdir.c b/src/fcdir.c
index 08334ab..6750562 100644
--- a/src/fcdir.c
+++ b/src/fcdir.c
@@ -177,7 +177,10 @@ FcDirScan (FcFontSet	    *set,
 	 * Check fonts.cache-<version> file
 	 */
 	if (FcDirCacheReadDir (set, dirs, dir))
+	{
+	    FcGlobalCacheReferenceSubdir (cache, dir);
 	    return FcTrue;
+	}
     
 	/*
 	 * Check ~/.fonts.cache-<version> file
diff --git a/src/fcint.h b/src/fcint.h
index fbdaabd..f45ba39 100644
--- a/src/fcint.h
+++ b/src/fcint.h
@@ -344,6 +344,10 @@ void
 FcGlobalCacheReferenced (FcGlobalCache	    *cache,
 			 FcGlobalCacheInfo  *info);
 
+void
+FcGlobalCacheReferenceSubdir (FcGlobalCache *cache,
+			      const FcChar8 *dir);
+
 FcGlobalCacheDir *
 FcGlobalCacheDirGet (FcGlobalCache  *cache,
 		     const FcChar8  *dir,