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#include <Elementary.h>
#include "elm_priv.h"
/* what are moodules in elementary for? for modularising behavior and features
* so they can be plugged in and out where you dont want the core source to
* always behave like that or do it that way. plug it at runtime!
*
* they have module names (in config) and "slots" to plug that module into
* to server a purpose. eg you plug plugin "xx" into the "entry-copy-paste"
* slot so it would provide replacement copy & paste ui functionality and
* specific symbols
*
* config is something like:
*
* export ELM_MODULES="xx>slot1:yy>slot2"
*
* where a module named xx is plugged into slot1 & yy is plugged into slot2
*
* real examples:
*
* export ELM_MODULES="my_module>entry/api"
*
* this loads the module called "my_module" into the slot "entry/api" which
* is an api slot for entry modules to modify behavior and hook to
* creation/deletion of the entry as well as replace the longpress behavior.
*/
#ifdef HAVE_CONFIG_H
# include "elementary_config.h"
#endif
#include <dlfcn.h> /* dlopen,dlclose,etc */
static Eina_Hash *modules = NULL;
static Eina_Hash *modules_as = NULL;
void
_elm_module_init(void)
{
modules = eina_hash_string_small_new(NULL);
modules_as = eina_hash_string_small_new(NULL);
}
void
_elm_module_shutdown(void)
{
// FIXME: unload all modules
if (modules) eina_hash_free(modules);
modules = NULL;
if (modules_as) eina_hash_free(modules_as);
modules_as = NULL;
}
void
_elm_module_parse(const char *s)
{
const char *p, *pe;
p = s;
pe = p;
for (;;)
{
if ((*pe == ':') || (!*pe))
{ // p -> pe == 'name:'
if (pe > p)
{
char *n = malloc(pe - p + 1);
if (n)
{
char *nn;
strncpy(n, p, pe - p);
n[pe - p] = 0;
nn = strchr(n, '>');
if (nn)
{
*nn = 0;
nn++;
_elm_module_add(n, nn);
}
free(n);
}
}
if (!*pe) break;
p = pe + 1;
pe = p;
}
else
pe++;
}
}
Elm_Module *
_elm_module_find_as(const char *as)
{
Elm_Module *m;
m = eina_hash_find(modules_as, as);
return m;
}
Elm_Module *
_elm_module_add(const char *name, const char *as)
{
Elm_Module *m;
char buf[PATH_MAX];
m = eina_hash_find(modules, name);
if (m)
{
m->references++;
return m;
}
m = calloc(1, sizeof(Elm_Module));
if (!m) return NULL;
m->version = 1;
if (name[0] != '/')
{
const char *home = getenv("HOME");
if (home)
{
snprintf(buf, sizeof(buf), "%s/.elementary/modules/%s/%s/module" EFL_SHARED_EXTENSION, home, name, MODULE_ARCH);
m->handle = dlopen(buf, RTLD_NOW | RTLD_GLOBAL);
if (m->handle)
{
m->init_func = dlsym(m->handle, "elm_modapi_init");
if (m->init_func)
{
m->shutdown_func = dlsym(m->handle, "elm_modapi_shutdown");
m->so_path = eina_stringshare_add(buf);
m->name = eina_stringshare_add(name);
snprintf(buf, sizeof(buf), "%s/.elementary/modules/%s/%s", home, name, MODULE_ARCH);
m->bin_dir = eina_stringshare_add(buf);
snprintf(buf, sizeof(buf), "%s/.elementary/modules/%s", home, name);
m->data_dir = eina_stringshare_add(buf);
}
else
{
dlclose(m->handle);
free(m);
return NULL;
}
}
}
if (!m->handle)
{
snprintf(buf, sizeof(buf), "%s/elementary/modules/%s/%s/module" EFL_SHARED_EXTENSION, _elm_lib_dir, name, MODULE_ARCH);
m->handle = dlopen(buf, RTLD_NOW | RTLD_GLOBAL);
if (m->handle)
{
m->init_func = dlsym(m->handle, "elm_modapi_init");
if (m->init_func)
{
m->shutdown_func = dlsym(m->handle, "elm_modapi_shutdown");
m->so_path = eina_stringshare_add(buf);
m->name = eina_stringshare_add(name);
snprintf(buf, sizeof(buf), "%s/elementary/modules/%s/%s", _elm_lib_dir, name, MODULE_ARCH);
m->bin_dir = eina_stringshare_add(buf);
snprintf(buf, sizeof(buf), "%s/elementary/modules/%s", _elm_lib_dir, name);
m->data_dir = eina_stringshare_add(buf);
}
else
{
dlclose(m->handle);
free(m);
return NULL;
}
}
}
}
if (!m->handle)
{
free(m);
return NULL;
}
if (!m->init_func(m))
{
dlclose(m->handle);
eina_stringshare_del(m->name);
eina_stringshare_del(m->so_path);
eina_stringshare_del(m->data_dir);
eina_stringshare_del(m->bin_dir);
free(m);
return NULL;
}
m->references = 1;
eina_hash_direct_add(modules, m->name, m);
m->as = eina_stringshare_add(as);
eina_hash_direct_add(modules_as, m->as, m);
return m;
}
void
_elm_module_del(Elm_Module *m)
{
m->references--;
if (m->references > 0) return;
if (m->shutdown_func) m->shutdown_func(m);
eina_hash_del(modules, m->name, m);
eina_hash_del(modules_as, m->as, m);
if (m->api) free(m->api);
eina_stringshare_del(m->name);
eina_stringshare_del(m->as);
eina_stringshare_del(m->so_path);
eina_stringshare_del(m->data_dir);
eina_stringshare_del(m->bin_dir);
dlclose(m->handle);
free(m);
}
const void *
_elm_module_symbol_get(Elm_Module *m, const char *name)
{
return dlsym(m->handle, name);
}
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