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

   1 #include "plugins/interface.h"
   2 #include "parser/parse.h"
   3
   4 #include <glib.h>
   5 #include <gmodule.h>
   6
   7 typedef struct {
   8     GModule *module;
   9     char *name;
  10
  11     PluginSetupConfig config;
  12     PluginStartup startup;
  13     PluginShutdown shutdown;
  14 } Plugin;
  15
  16 static gpointer load_sym(GModule *module, char *name, char *symbol,
  17                          gboolean allow_fail)
  18 {
  19     gpointer var;
  20     if (!g_module_symbol(module, symbol, &var)) {
  21         if (!allow_fail)
  22             g_warning("Failed to load symbol '%s' from plugin '%s'",
  23                       symbol, name);
  24         var = NULL;
  25     }
  26     return var;
  27 }
  28
  29 static Plugin *plugin_new(char *name)
  30 {
  31     Plugin *p;
  32     char *path;
  33
  34     p = g_new(Plugin, 1);
  35
  36     path = g_build_filename(g_get_home_dir(), ".openbox", "plugins", name,
  37                             NULL);
  38     p->module = g_module_open(path, 0);
  39     g_free(path);
  40
  41     if (p->module == NULL) {
  42         path = g_build_filename(PLUGINDIR, name, NULL);
  43         p->module = g_module_open(path, 0);
  44         g_free(path);
  45     }
  46
  47     if (p->module == NULL) {
  48         g_warning(g_module_error());
  49         g_free(p);
  50         return NULL;
  51     }
  52
  53     p->config = (PluginSetupConfig)load_sym(p->module, name,
  54                                             "plugin_setup_config", FALSE);
  55     p->startup = (PluginStartup)load_sym(p->module, name, "plugin_startup",
  56                                          FALSE);
  57     p->shutdown = (PluginShutdown)load_sym(p->module, name, "plugin_shutdown",
  58                                            FALSE);
  59
  60     if (p->config == NULL || p->startup == NULL || p->shutdown == NULL) {
  61         g_module_close(p->module);
  62         g_free(p);
  63         return NULL;
  64     }
  65
  66     p->name = g_strdup(name);
  67     return p;
  68 }
  69
  70 static void plugin_free(Plugin *p)
  71 {
  72     p->shutdown();
  73
  74     g_free(p->name);
  75     g_module_close(p->module);
  76 }
  77
  78
  79 static GData *plugins = NULL;
  80
  81 void plugin_startup()
  82 {
  83     g_datalist_init(&plugins);
  84 }
  85
  86 void plugin_shutdown()
  87 {
  88     g_datalist_clear(&plugins);
  89 }
  90
  91 gboolean plugin_open_full(char *name, gboolean reopen, ObParseInst *i)
  92 {
  93     Plugin *p;
  94
  95     if (g_datalist_get_data(&plugins, name) != NULL) {
  96         if (!reopen)
  97             g_warning("plugin '%s' already loaded, can't load again", name);
  98         return TRUE;
  99     }
 100
 101     p = plugin_new(name);
 102     if (p == NULL) {
 103         g_warning("failed to load plugin '%s'", name);
 104         return FALSE;
 105     }
 106     p->config(i);
 107
 108     g_datalist_set_data_full(&plugins, name, p, (GDestroyNotify) plugin_free);
 109     return TRUE;
 110 }
 111
 112 gboolean plugin_open(char *name, ObParseInst *i) {
 113     return plugin_open_full(name, FALSE, i);
 114 }
 115
 116 gboolean plugin_open_reopen(char *name, ObParseInst *i) {
 117     return plugin_open_full(name, TRUE, i);
 118 }
 119
 120 void plugin_close(char *name)
 121 {
 122     g_datalist_remove_data(&plugins, name);
 123 }
 124
 125 static void foreach_start(GQuark key, Plugin *p, gpointer *foo)
 126 {
 127     p->startup();
 128 }
 129
 130 void plugin_startall()
 131 {
 132     g_datalist_foreach(&plugins, (GDataForeachFunc)foreach_start, NULL);
 133 }
 134
 135 void plugin_loadall(ObParseInst *i)
 136 {
 137     GIOChannel *io;
 138     GError *err;
 139     char *path, *name;
 140
 141     path = g_build_filename(g_get_home_dir(), ".openbox", "pluginrc", NULL);
 142     err = NULL;
 143     io = g_io_channel_new_file(path, "r", &err);
 144     g_free(path);
 145
 146     if (io == NULL) {
 147         path = g_build_filename(RCDIR, "pluginrc", NULL);
 148         err = NULL;
 149         io = g_io_channel_new_file(path, "r", &err);
 150         g_free(path);
 151     }
 152
 153     if (io == NULL) {
 154         /* load the default plugins */
 155         plugin_open("placement", i);
 156
 157         /* XXX rm me when the parser loads me magically */
 158         plugin_open("client_menu", i);
 159         plugin_open("client_list_menu", i);
 160     } else {
 161         /* load the plugins in the rc file */
 162         while (g_io_channel_read_line(io, &name, NULL, NULL, &err) ==
 163                G_IO_STATUS_NORMAL) {
 164             g_strstrip(name);
 165             if (name[0] != '\0' && name[0] != '#')
 166                 plugin_open(name, i);
 167             g_free(name);
 168         }
 169         g_io_channel_unref(io);
 170     }
 171 }