Dogcows Code - chaz/openbox/blob - openbox/plugin.c

   1 #include <glib.h>
   2 #include <gmodule.h>
   3
   4 typedef void (*PluginStartup)();
   5 typedef void (*PluginShutdown)();
   6
   7 typedef struct {
   8     GModule *module;
   9     char *name;
  10
  11     PluginStartup startup;
  12     PluginShutdown shutdown;
  13 } Plugin;
  14
  15 static gpointer load_sym(GModule *module, char *name, char *symbol)
  16 {
  17     gpointer var;
  18     if (!g_module_symbol(module, symbol, &var)) {
  19         g_warning("Failed to load symbol '%s' from plugin '%s'",
  20                   symbol, name);
  21         var = NULL;
  22     }
  23     return var;
  24 }
  25
  26 static Plugin *plugin_new(char *name)
  27 {
  28     Plugin *p;
  29     char *path;
  30
  31     p = g_new(Plugin, 1);
  32
  33     path = g_build_filename(PLUGINDIR, name, NULL);
  34     p->module = g_module_open(path, 0);
  35     g_free(path);
  36
  37     if (p->module == NULL) {
  38         path = g_build_filename(g_get_home_dir(), ".openbox", "plugins", name,
  39                                 NULL);
  40         p->module = g_module_open(path, 0);
  41         g_free(path);
  42     }
  43
  44     if (p->module == NULL) {
  45         g_free(p);
  46         return NULL;
  47     }
  48
  49     p->startup = (PluginStartup)load_sym(p->module, name, "plugin_startup");
  50     p->shutdown = (PluginShutdown)load_sym(p->module, name, "plugin_shutdown");
  51
  52     if (p->startup == NULL || p->shutdown == NULL) {
  53         g_module_close(p->module);
  54         g_free(p);
  55         return NULL;
  56     }
  57
  58     p->name = g_strdup(name);
  59     return p;
  60 }
  61
  62 static void plugin_free(Plugin *p)
  63 {
  64     p->shutdown();
  65
  66     g_free(p->name);
  67     g_module_close(p->module);
  68 }
  69
  70
  71 static GData *plugins = NULL;
  72
  73 void plugin_startup()
  74 {
  75     g_datalist_init(&plugins);
  76 }
  77
  78 void plugin_shutdown()
  79 {
  80     g_datalist_clear(&plugins);
  81 }
  82
  83 gboolean plugin_open(char *name)
  84 {
  85     Plugin *p;
  86
  87     if (g_datalist_get_data(&plugins, name) != NULL) {
  88         g_warning("plugin '%s' already loaded, can't load again", name);
  89         return TRUE;
  90     }
  91
  92     p = plugin_new(name);
  93     if (p == NULL) {
  94         g_warning("failed to load plugin '%s'", name);
  95         return FALSE;
  96     }
  97     /* XXX p->plugin_set_config(); */
  98
  99     g_datalist_set_data_full(&plugins, name, p,  (GDestroyNotify) plugin_free);
 100     return TRUE;
 101 }
 102
 103 void plugin_close(char *name)
 104 {
 105     g_datalist_remove_data(&plugins, name);
 106 }
 107
 108 static void foreach_start(GQuark key, Plugin *p, gpointer *foo)
 109 {
 110     p->startup();
 111 }
 112
 113 void plugin_startall()
 114 {
 115     g_datalist_foreach(&plugins, (GDataForeachFunc)foreach_start, NULL);
 116 }
 117
 118 void plugin_loadall()
 119 {
 120     GIOChannel *io;
 121     GError *err;
 122     char *path, *name;
 123
 124     path = g_build_filename(g_get_home_dir(), ".openbox", "pluginrc", NULL);
 125     err = NULL;
 126     io = g_io_channel_new_file(path, "r", &err);
 127     g_free(path);
 128
 129     if (io == NULL) {
 130         path = g_build_filename(RCDIR, "pluginrc", NULL);
 131         err = NULL;
 132         io = g_io_channel_new_file(path, "r", &err);
 133         g_free(path);
 134     }
 135
 136     if (io == NULL) {
 137         /* load the default plugins */
 138         plugin_open("focus");
 139         plugin_open("keyboard");
 140         plugin_open("mouse");
 141         plugin_open("placement");
 142         plugin_open("resistance");
 143     } else {
 144         /* load the plugins in the rc file */
 145         while (g_io_channel_read_line(io, &name, NULL, NULL, &err) ==
 146                G_IO_STATUS_NORMAL) {
 147             plugin_open(name);
 148             g_free(name);
 149         }
 150         g_io_channel_unref(io);
 151     }
 152 }