add an empty function to parse the Desktop Entry group in a .desktop file

[chaz/openbox] / obt / ddfile.c

diff --git a/obt/ddfile.c b/obt/ddfile.c
index b4b5d29826ed86519c0cebba4f996fd54b7d4db2..edf7c0bb0f0fe90dfe063d9c3ac743bc8dd9a9a3 100644 (file)
--- a/obt/ddfile.c
+++ b/obt/ddfile.c
@@ -26,19 +26,22 @@
 #endif
 
 typedef void (*ObtDDParseGroupFunc)(const gchar *group,
-                                    const gchar *key,
-                                    const gchar *value);
+                                    GHashTable *key_hash);
 
 typedef struct _ObtDDParseGroup {
     gchar *name;
     gboolean seen;
     ObtDDParseGroupFunc func;
+    /* the key is a string (a key in the .desktop).
+       the value is a strings (a value in the .desktop) */
+    GHashTable *key_hash;
 } ObtDDParseGroup;
 
 typedef struct _ObtDDParse {
     gchar *filename;
     gulong lineno;
     ObtDDParseGroup *group;
+    /* the key is a group name, the value is a ObtDDParseGroup */
     GHashTable *group_hash;
 } ObtDDParse;
 
@@ -81,9 +84,21 @@ struct _ObtDDFile {
     } d;
 };
 
+static ObtDDParseGroup* group_new(gchar *name, ObtDDParseGroupFunc f)
+{
+    ObtDDParseGroup *g = g_slice_new(ObtDDParseGroup);
+    g->name = name;
+    g->func = f;
+    g->seen = FALSE;
+    g->key_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
+                                        g_free, g_free);
+    return g;
+}
+
 static void group_free(ObtDDParseGroup *g)
 {
     g_free(g->name);
+    g_hash_table_destroy(g->key_hash);
     g_slice_free(ObtDDParseGroup, g);
 }
 
@@ -303,10 +318,8 @@ static void parse_group(const gchar *buf, gulong len,
     }
     else {
         if (!g) {
-            g = g_slice_new(ObtDDParseGroup);
-            g->name = group;
-            g->func = NULL;
-            g_hash_table_insert(parse->group_hash, group, g);
+            g = group_new(group, NULL);
+            g_hash_table_insert(parse->group_hash, g->name, g);
         }
         else
             g_free(group);
@@ -317,6 +330,71 @@ static void parse_group(const gchar *buf, gulong len,
     }
 }
 
+static void parse_key_value(const gchar *buf, gulong len,
+                            ObtDDParse *parse, gboolean *error)
+{
+    gulong i, keyend, valstart, eq;
+    char *key, *val;
+
+    /* find the end of the key */
+    for (i = 0; i < len; ++i)
+        if (!(((guchar)buf[i] >= 'A' && (guchar)buf[i] <= 'Z') ||
+              ((guchar)buf[i] >= 'a' && (guchar)buf[i] <= 'z') ||
+              ((guchar)buf[i] >= '0' && (guchar)buf[i] <= '9') ||
+              ((guchar)buf[i] == '-'))) {
+            /* not part of the key */
+            keyend = i;
+            break;
+        }
+    if (keyend < 1) {
+        parse_error("Empty key", parse, error);
+        return;
+    }
+    /* find the = character */
+    for (i = keyend; i < len; ++i) {
+        if (buf[i] == '=') {
+            eq = i;
+            break;
+        }
+        else if (buf[i] != ' ') {
+            parse_error("Invalid character in key name", parse, error);
+            return ;
+        }
+    }
+    if (i == len) {
+        parse_error("Key without value found", parse, error);
+        return;
+    }
+    /* find the start of the value */
+    for (i = eq+1; i < len; ++i)
+        if (buf[i] != ' ') {
+            valstart = i;
+            break;
+        }
+    if (i == len) {
+        parse_error("Empty value found", parse, error);
+        return;
+    }
+
+    key = g_strndup(buf, keyend);
+    val = g_strndup(buf+valstart, len-valstart);
+    if (g_hash_table_lookup(parse->group->key_hash, key)) {
+        parse_error("Duplicate key found", parse, error);
+        g_free(key);
+        g_free(val);
+        return;
+    }
+    g_hash_table_insert(parse->group->key_hash, key, val);
+    g_print("Found key/value %s=%s.\n", key, val);
+}
+
+void foreach_group(gpointer pkey, gpointer pvalue, gpointer user_data)
+{
+    gchar *name = pkey;
+    ObtDDParseGroup *g = pvalue;
+    if (g->func) g->func(name, g->key_hash);
+}
+
 static gboolean parse_file(ObtDDFile *dd, FILE *f, ObtDDParse *parse)
 {
     gchar *buf = NULL;
@@ -330,19 +408,35 @@ static gboolean parse_file(ObtDDFile *dd, FILE *f, ObtDDParse *parse)
             ; /* ignore comment lines */
         else if (buf[0] == '[' && buf[len-1] == ']')
             parse_group(buf, len, parse, &error);
+        else if (!parse->group)
+            /* just ignore keys outside of groups */
+            parse_error("Key found before group", parse, NULL);
+        else
+            /* ignore errors in key-value pairs and continue */
+            parse_key_value(buf, len, parse, NULL);
         ++parse->lineno;
     }
 
+    g_hash_table_foreach(parse->group_hash, foreach_group, NULL);
+
     if (buf) g_free(buf);
     return !error;
 }
 
+static void parse_group_desktop_entry(const gchar *group,
+                                      GHashTable *keys)
+{
+    g_print("Parsing group %s\n", group);
+}
+
 ObtDDFile* obt_ddfile_new_from_file(const gchar *name, GSList *paths)
 {
     ObtDDFile *dd;
     ObtDDParse parse;
+    ObtDDParseGroup *desktop_entry;
     GSList *it;
     FILE *f;
+    gboolean success;
 
     dd = g_slice_new(ObtDDFile);
     dd->ref = 1;
@@ -350,22 +444,28 @@ ObtDDFile* obt_ddfile_new_from_file(const gchar *name, GSList *paths)
     parse.filename = NULL;
     parse.lineno = 0;
     parse.group = NULL;
-    /* hashtable keys are group names, value is a ObtDDParseGroup */
     parse.group_hash = g_hash_table_new_full(g_str_hash,
                                              g_str_equal,
                                              NULL,
                                              (GDestroyNotify)group_free);
 
-    f = NULL;
-    for (it = paths; it && !f; it = g_slist_next(it)) {
+    /* set up the groups (there's only one right now) */
+    desktop_entry = group_new(g_strdup("Desktop Entry"),
+                              parse_group_desktop_entry);
+    g_hash_table_insert(parse.group_hash, desktop_entry->name, desktop_entry);
+
+    success = FALSE;
+    for (it = paths; it && !success; it = g_slist_next(it)) {
         gchar *path = g_strdup_printf("%s/%s", (char*)it->data, name);
         if ((f = fopen(path, "r"))) {
             parse.filename = path;
             parse.lineno = 1;
-            if (!parse_file(dd, f, &parse)) f = NULL;
+            success = parse_file(dd, f, &parse);
+            fclose(f);
         }
+        g_free(path);
     }
-    if (!f) {
+    if (!success) {
         obt_ddfile_unref(dd);
         dd = NULL;
     }