openbox/plugin.c (raw)
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#include "plugins/interface.h"
#include "parser/parse.h"
#include <glib.h>
#include <gmodule.h>
typedef struct {
GModule *module;
gchar *name;
gboolean started;
PluginSetupConfig config;
PluginStartup startup;
PluginShutdown shutdown;
} Plugin;
static gpointer load_sym(GModule *module, gchar *name, gchar *symbol,
gboolean allow_fail)
{
gpointer var;
if (!g_module_symbol(module, symbol, &var)) {
if (!allow_fail)
g_warning("Failed to load symbol '%s' from plugin '%s'",
symbol, name);
var = NULL;
}
return var;
}
static Plugin *plugin_new(gchar *name)
{
Plugin *p;
gchar *path;
p = g_new(Plugin, 1);
p->started = FALSE;
path = g_build_filename(g_get_home_dir(), ".openbox", "plugins", name,
NULL);
p->module = g_module_open(path, 0);
g_free(path);
if (p->module == NULL) {
path = g_build_filename(PLUGINDIR, name, NULL);
p->module = g_module_open(path, 0);
g_free(path);
}
if (p->module == NULL) {
g_warning(g_module_error());
g_free(p);
return NULL;
}
p->config = (PluginSetupConfig)load_sym(p->module, name,
"plugin_setup_config", FALSE);
p->startup = (PluginStartup)load_sym(p->module, name, "plugin_startup",
FALSE);
p->shutdown = (PluginShutdown)load_sym(p->module, name, "plugin_shutdown",
FALSE);
if (p->config == NULL || p->startup == NULL || p->shutdown == NULL) {
g_module_close(p->module);
g_free(p);
return NULL;
}
p->name = g_strdup(name);
return p;
}
static void plugin_free(Plugin *p)
{
p->shutdown();
g_free(p->name);
g_module_close(p->module);
}
static GData *plugins = NULL;
void plugin_startup()
{
g_datalist_init(&plugins);
}
void plugin_shutdown()
{
g_datalist_clear(&plugins);
}
gboolean plugin_open(gchar *name, ObParseInst *i)
{
Plugin *p;
if (g_datalist_get_data(&plugins, name) != NULL)
return TRUE;
p = plugin_new(name);
if (p == NULL) {
g_warning("failed to load plugin '%s'", name);
return FALSE;
}
p->config(i);
g_datalist_set_data_full(&plugins, name, p, (GDestroyNotify) plugin_free);
return TRUE;
}
static void foreach_start(GQuark key, Plugin *p, gpointer *foo)
{
if (!p->started) {
p->startup();
p->started = TRUE;
}
}
void plugin_startall()
{
g_datalist_foreach(&plugins, (GDataForeachFunc)foreach_start, NULL);
}
void plugin_start(gchar *name)
{
Plugin *p;
if (!(p = g_datalist_get_data(&plugins, name))) {
g_warning("Tried to start plugin '%s' but it is not loaded", name);
return;
}
if (!p->started) {
p->startup();
p->started = TRUE;
}
}
void plugin_loadall(ObParseInst *i)
{
GIOChannel *io;
GError *err;
gchar *path, *name;
path = g_build_filename(g_get_home_dir(), ".openbox", "pluginrc", NULL);
err = NULL;
io = g_io_channel_new_file(path, "r", &err);
g_free(path);
if (io == NULL) {
path = g_build_filename(RCDIR, "pluginrc", NULL);
err = NULL;
io = g_io_channel_new_file(path, "r", &err);
g_free(path);
}
if (io == NULL) {
/* load the default plugins */
plugin_open("placement", i);
} else {
/* load the plugins in the rc file */
while (g_io_channel_read_line(io, &name, NULL, NULL, &err) ==
G_IO_STATUS_NORMAL) {
g_strstrip(name);
if (name[0] != '\0' && name[0] != '#')
plugin_open(name, i);
g_free(name);
}
g_io_channel_unref(io);
}
}
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