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path: root/legacy/ecore/src/lib/ecore_imf/ecore_imf_module.c
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/*
 * vim:ts=8:sw=3:sts=8:noexpandtab:cino=>5n-3f0^-2{2
 */

#include <limits.h>
#include <stdio.h>
#include <stdlib.h>

#include "config.h"

#include "ecore_imf_private.h"

static void _ecore_imf_module_load_all(void);
static void _ecore_imf_module_append(Ecore_Plugin *plugin, const Ecore_IMF_Context_Info *info, Ecore_IMF_Context *(*imf_module_create)(void));
static void _ecore_imf_module_free(Ecore_IMF_Module *module);
static int _ecore_imf_modules_exists(const char *ctx_id);

static Ecore_Path_Group *ecore_imf_modules_path = NULL;
static Ecore_Hash *modules = NULL;

void
ecore_imf_module_init(void)
{
   char pathname[PATH_MAX];
   const char *homedir;

   ecore_imf_modules_path = ecore_path_group_new();
   snprintf(pathname, sizeof(pathname), "%s/ecore/immodules/",
	    PACKAGE_LIB_DIR);
   ecore_path_group_add(ecore_imf_modules_path, pathname);

   homedir = getenv("HOME");
   if (homedir)
     {
	snprintf(pathname, sizeof(pathname), "%s/.ecore/immodules/",
		 homedir);
	ecore_path_group_add(ecore_imf_modules_path, pathname);
     }

   modules = NULL;
   _ecore_imf_module_load_all();
}

void
ecore_imf_module_shutdown(void)
{
   if (modules)
     {
	ecore_hash_destroy(modules);
	modules = NULL;
     }

   ecore_path_group_del(ecore_imf_modules_path);
   ecore_imf_modules_path = NULL;
}

Ecore_List *
ecore_imf_module_available_get(void)
{
   Ecore_List *values;
   unsigned int i = 0;

   if (!modules) return NULL;

   /* ecore_hash_values() */
   values = ecore_list_new();
   while (i < ecore_prime_table[modules->size])
     {
	if (modules->buckets[i])
	  {
	     Ecore_Hash_Node *node;

	     for (node = modules->buckets[i]; node; node = node->next)
	       ecore_list_append(values, node->value);
	  }
	i++;
     }
   ecore_list_first_goto(values);

   return values;
}

Ecore_IMF_Module *
ecore_imf_module_get(const char *ctx_id)
{
   if (!modules) return NULL;
   return ecore_hash_get(modules, ctx_id);
}

Ecore_IMF_Context *
ecore_imf_module_context_create(const char *ctx_id)
{
   Ecore_IMF_Module *module;

   if (!modules) return NULL;
   module = ecore_hash_get(modules, ctx_id);
   if (module) return module->create();
   return NULL;
}

Ecore_List *
ecore_imf_module_context_ids_get(void)
{
   if (!modules) return NULL;
   return ecore_hash_keys(modules);
}

static void
_ecore_imf_module_load_all(void)
{
   Ecore_List *avail;
   char *filename;
   Ecore_Plugin *plugin;
   const Ecore_IMF_Context_Info *info = NULL;
   int (*imf_module_init)(const Ecore_IMF_Context_Info **info);
   Ecore_IMF_Context *(*imf_module_create)(void);
   Ecore_IMF_Module *module;

   avail = ecore_plugin_available_get(ecore_imf_modules_path);
   if (!avail) return;

   ecore_list_first_goto(avail);
   while (filename = ecore_list_next(avail))
     {
	plugin = ecore_plugin_load(ecore_imf_modules_path, filename, NULL);
	if (!plugin)
	  {
	     fprintf(stderr, "** ecore_imf: Error loading input method plugin %s!\n",
		     filename);
	     continue;
	  }

	imf_module_init = ecore_plugin_symbol_get(plugin, "imf_module_init");
	if (!imf_module_init || !imf_module_init(&info) || !info)
	  {
	     fprintf(stderr, "** ecore_imf: Error initializing input method plugin %s! "
			     "'imf_module_init' is missing or failed to run!",
		     filename);
	     ecore_plugin_unload(plugin);
	     continue;
	  }

	if (_ecore_imf_modules_exists(info->id))
	  {
	     fprintf(stderr, "** ecore_imf: Error loading input method plugin %s! "
			     "Plugin with id='%s' already exists!",
		     info->id);
	     ecore_plugin_unload(plugin);
	     continue;
	  }

	imf_module_create = ecore_plugin_symbol_get(plugin, "imf_module_create");
	if (!imf_module_create)
	  {
	     fprintf(stderr, "** ecore_imf: Error setting up input method plugin %s! "
			     "'imf_module_create' is missing!",
		     filename);
	     ecore_plugin_unload(plugin);
	     continue;
	  }

	_ecore_imf_module_append(plugin, info, imf_module_create);
     }

   ecore_list_destroy(avail);
}

static void
_ecore_imf_module_append(Ecore_Plugin *plugin,
			const Ecore_IMF_Context_Info *info,
			Ecore_IMF_Context *(*imf_module_create)(void))
{
   Ecore_IMF_Module *module;

   if (!modules)
     {
	modules = ecore_hash_new(ecore_str_hash, ecore_str_compare);
	ecore_hash_free_key_cb_set(modules, free);
	ecore_hash_free_value_cb_set(modules, (Ecore_Free_Cb) _ecore_imf_module_free);
     }

   module = malloc(sizeof(Ecore_IMF_Module));
   module->plugin = plugin;
   module->info = info;
   /* cache imf_module_create as it may be used several times */
   module->create = imf_module_create;

   ecore_hash_set(modules, strdup(info->id), module);
}

static void
_ecore_imf_module_free(Ecore_IMF_Module *module)
{
   int (*imf_module_exit)(void);

   imf_module_exit = ecore_plugin_symbol_get(module->plugin, "imf_module_exit");
   if (imf_module_exit) imf_module_exit();
   ecore_plugin_unload(module->plugin);
   free(module);
}

static int
_ecore_imf_modules_exists(const char *ctx_id)
{
   if (!modules) return 0;
   return (ecore_hash_get(modules, ctx_id) != NULL);
}