forked from RepoMirrors/bemenu
5a4d364d50
Welcome glorious GNU Makefile
191 lines
3.7 KiB
C
191 lines
3.7 KiB
C
#include "internal.h"
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#include "3rdparty/cdl.h"
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <dirent.h>
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#include <stdio.h>
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#include <assert.h>
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static struct list renderers;
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static void
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bm_renderer_free(struct bm_renderer *renderer)
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{
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assert(renderer);
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if (renderer->handle)
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chckDlUnload(renderer->handle);
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free(renderer->name);
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free(renderer->file);
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free(renderer);
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}
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static bool
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load(const char *file, struct bm_renderer *renderer)
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{
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void *handle;
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const char *error = NULL;
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if (!(handle = chckDlLoad(file, &error)))
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goto load_fail;
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union {
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const char* (*fun)(struct render_api*);
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void *ptr;
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} reg;
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if (!(reg.ptr = chckDlLoadSymbol(handle, "register_renderer", &error)))
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goto load_fail;
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const char *name;
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if (!(name = reg.fun(&renderer->api)))
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goto fail;
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if (strcmp(renderer->api.version, BM_PLUGIN_VERSION))
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goto mismatch_fail;
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if (!renderer->name)
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renderer->name = bm_strdup(name);
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if (!renderer->file)
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renderer->file = bm_strdup(file);
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renderer->handle = handle;
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return true;
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load_fail:
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fprintf(stderr, "%s\n", error);
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goto fail;
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mismatch_fail:
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fprintf(stderr, "%s: version mismatch (%s != %s)\n", name, renderer->api.version, BM_PLUGIN_VERSION);
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fail:
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if (handle)
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chckDlUnload(handle);
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return false;
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}
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static int
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compare(const void *a, const void *b)
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{
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const struct bm_renderer *ra = *(struct bm_renderer**)a, *rb = *(struct bm_renderer**)b;
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return (ra->api.priorty > rb->api.priorty);
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}
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static bool
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load_to_list(const char *file)
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{
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struct bm_renderer *renderer;
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if (!(renderer = calloc(1, sizeof(struct bm_renderer))))
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goto fail;
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if (!load(file, renderer))
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goto fail;
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chckDlUnload(renderer->handle);
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renderer->handle = NULL;
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if (!list_add_item(&renderers, renderer))
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goto fail;
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list_sort(&renderers, compare);
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return true;
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fail:
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if (renderer)
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bm_renderer_free(renderer);
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return false;
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}
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bool
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bm_renderer_activate(struct bm_renderer *renderer, struct bm_menu *menu)
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{
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assert(renderer);
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if (!load(renderer->file, renderer))
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return false;
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menu->renderer = renderer;
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if (!renderer->api.constructor(menu))
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goto fail;
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return true;
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fail:
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chckDlUnload(renderer->handle);
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menu->renderer = NULL;
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return false;
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}
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bool
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bm_init(void)
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{
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if (renderers.count > 0)
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return true;
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static const char *rpath = INSTALL_LIBDIR "/bemenu";
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const char *path = secure_getenv("BEMENU_RENDERER");
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if (path)
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return load_to_list(path);
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path = secure_getenv("BEMENU_RENDERERS");
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if (!path || access(path, R_OK) == -1)
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path = rpath;
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DIR *dir;
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if (!(dir = opendir(path)))
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goto fail;
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struct dirent *file;
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while ((file = readdir(dir))) {
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if (file->d_type != DT_DIR && !strncmp(file->d_name, "bemenu-renderer-", strlen("bemenu-renderer-"))) {
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char *fpath;
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if ((fpath = bm_dprintf("%s/%s", path, file->d_name))) {
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load_to_list(fpath);
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free(fpath);
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}
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}
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}
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closedir(dir);
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return (renderers.count > 0 ? true : false);
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fail:
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return false;
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}
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const struct bm_renderer**
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bm_get_renderers(uint32_t *out_nmemb)
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{
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assert(out_nmemb);
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return list_get_items(&renderers, out_nmemb);
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}
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const char*
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bm_version(void)
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{
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return BM_VERSION;
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}
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const char*
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bm_renderer_get_name(const struct bm_renderer *renderer)
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{
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assert(renderer);
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return renderer->name;
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}
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enum bm_priorty
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bm_renderer_get_priorty(const struct bm_renderer *renderer)
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{
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assert(renderer);
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return renderer->api.priorty;
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}
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/* vim: set ts=8 sw=4 tw=0 :*/
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