--- /dev/null
+/** \file
+ * \short LUA implementation
+ * \author Klaus Ethgen <Klaus@Ethgen.de>
+ */
+
+/*
+ * This file is a part of Geeqie project (http://geeqie.sourceforge.net/).
+ * Copyright (C) 2008 - 2010 The Geeqie Team
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include "config.h"
+
+#ifdef HAVE_LUA
+
+#define _XOPEN_SOURCE
+
+#include <lua.h>
+#include <lauxlib.h>
+#include <lualib.h>
+
+#include <stdio.h>
+#include <glib.h>
+#include <string.h>
+#include <time.h>
+
+#include "main.h"
+#include "glua.h"
+#include "ui_fileops.h"
+#include "exif.h"
+
+static lua_State *L; /** The LUA object needed for all operations (NOTE: That is
+ * a upper-case variable to match the documentation!) */
+
+static FileData *lua_check_image(lua_State *L, int index)
+{
+ FileData **fd;
+ luaL_checktype(L, index, LUA_TUSERDATA);
+ fd = (FileData **)luaL_checkudata(L, index, "Image");
+ if (fd == NULL) luaL_typerror(L, index, "Image");
+ return *fd;
+}
+
+static int lua_image_get_exif(lua_State *L)
+{
+ FileData *fd;
+ ExifData *exif;
+ ExifData **exif_data;
+
+ fd = lua_check_image(L, 1);
+ exif = exif_read_fd(fd);
+
+ exif_data = (ExifData **)lua_newuserdata(L, sizeof(ExifData *));
+ luaL_getmetatable(L, "Exif");
+ lua_setmetatable(L, -2);
+
+ *exif_data = exif;
+
+ return 1;
+}
+
+static int lua_image_get_path(lua_State *L)
+{
+ FileData *fd;
+
+ fd = lua_check_image(L, 1);
+ lua_pushstring(L, fd->path);
+ return 1;
+}
+
+static int lua_image_get_name(lua_State *L)
+{
+ FileData *fd;
+
+ fd = lua_check_image(L, 1);
+ lua_pushstring(L, fd->name);
+ return 1;
+}
+
+static int lua_image_get_extension(lua_State *L)
+{
+ FileData *fd;
+
+ fd = lua_check_image(L, 1);
+ lua_pushstring(L, fd->extension);
+ return 1;
+}
+
+static int lua_image_get_date(lua_State *L)
+{
+ FileData *fd;
+
+ fd = lua_check_image(L, 1);
+ lua_pushnumber(L, fd->date);
+ return 1;
+}
+
+static int lua_image_get_size(lua_State *L)
+{
+ FileData *fd;
+
+ fd = lua_check_image(L, 1);
+ lua_pushnumber(L, fd->size);
+ return 1;
+}
+
+static ExifData *lua_check_exif(lua_State *L, int index)
+{
+ ExifData **exif;
+ luaL_checktype(L, index, LUA_TUSERDATA);
+ exif = (ExifData **)luaL_checkudata(L, index, "Exif");
+ if (exif == NULL) luaL_typerror(L, index, "Exif");
+ return *exif;
+}
+
+/* Interface for EXIF data */
+static int lua_exif_get_datum(lua_State *L)
+{
+ const gchar *key;
+ gchar *value = NULL;
+ ExifData *exif;
+ struct tm tm;
+ time_t datetime;
+
+ exif = lua_check_exif(L, 1);
+ key = luaL_checkstring(L, 2);
+ if (key == (gchar*)NULL || key[0] == '\0')
+ {
+ lua_pushnil(L);
+ return 1;
+ }
+ if (!exif)
+ {
+ lua_pushnil(L);
+ return 1;
+ }
+ value = exif_get_data_as_text(exif, key);
+ if (strcmp(key, "Exif.Photo.DateTimeOriginal") == 0)
+ {
+ memset(&tm, 0, sizeof(tm));
+ if (value && strptime(value, "%Y:%m:%d %H:%M:%S", &tm))
+ {
+ datetime = mktime(&tm);
+ lua_pushnumber(L, datetime);
+ return 1;
+ }
+ else
+ {
+ lua_pushnil(L);
+ return 1;
+ }
+ } // if (strcmp(key, "Exif.Photo.Da...
+ lua_pushstring(L, value);
+ return 1;
+}
+
+/**
+ * \brief Initialize the lua interpreter.
+ */
+void lua_init(void)
+{
+ L = luaL_newstate();
+ luaL_openlibs(L); /* Open all libraries for lua programms */
+
+ /* Now create custom methodes to do something */
+ static const luaL_Reg meta_methods[] = {
+ {NULL, NULL}
+ };
+
+ /* The Image metatable and methodes */
+ static const luaL_Reg image_methods[] = {
+ {"get_path", lua_image_get_path},
+ {"get_name", lua_image_get_name},
+ {"get_extension", lua_image_get_extension},
+ {"get_date", lua_image_get_date},
+ {"get_size", lua_image_get_size},
+ {"get_exif", lua_image_get_exif},
+ {NULL, NULL}
+ };
+ luaL_register(L, "Image", image_methods);
+ luaL_newmetatable(L, "Image");
+ luaL_register(L, NULL, meta_methods);
+ lua_pushliteral(L, "__index");
+ lua_pushvalue(L, -3);
+ lua_settable(L, -3);
+ lua_pushliteral(L, "__metatable");
+ lua_pushvalue(L, -3);
+ lua_settable(L, -3);
+ lua_pop(L, 1);
+ lua_pop(L, 1);
+
+ /* The Exif table and methodes */
+ static const luaL_Reg exif_methods[] = {
+ {"get_datum", lua_exif_get_datum},
+ {NULL, NULL}
+ };
+ luaL_register(L, "Exif", exif_methods);
+ luaL_newmetatable(L, "Exif");
+ luaL_register(L, NULL, meta_methods);
+ lua_pushliteral(L, "__index");
+ lua_pushvalue(L, -3);
+ lua_settable(L, -3);
+ lua_pushliteral(L, "__metatable");
+ lua_pushvalue(L, -3);
+ lua_settable(L, -3);
+ lua_pop(L, 1);
+ lua_pop(L, 1);
+}
+
+/**
+ * \brief Call a lua function to get a single value.
+ */
+gchar *lua_callvalue(FileData *fd, const gchar *file, const gchar *function)
+{
+ gint result;
+ gchar *data = NULL;
+ gchar *dir;
+ gchar *path;
+ FileData **image_data;
+ gchar *tmp;
+ GError *error = NULL;
+
+ /* Collection Table (Dummy at the moment) */
+ lua_newtable(L);
+ lua_setglobal(L, "Collection");
+
+ /* Current Image */
+ image_data = (FileData **)lua_newuserdata(L, sizeof(FileData *));
+ luaL_getmetatable(L, "Image");
+ lua_setmetatable(L, -2);
+ lua_setglobal(L, "Image");
+
+ *image_data = fd;
+ if (file[0] == '\0')
+ {
+ result = luaL_dostring(L, function);
+ }
+ else
+ {
+ dir = g_build_filename(get_rc_dir(), "lua", NULL);
+ path = g_build_filename(dir, file, NULL);
+ result = luaL_dofile(L, path);
+ g_free(path);
+ g_free(dir);
+ }
+
+ if (result)
+ {
+ data = g_strdup_printf("Error running lua script: %s", lua_tostring(L, -1));
+ return data;
+ }
+ data = g_strdup(lua_tostring(L, -1));
+ tmp = g_locale_to_utf8(data, strlen(data), NULL, NULL, &error);
+ if (error)
+ {
+ log_printf("Error converting lua output from locale to UTF-8: %s\n", error->message);
+ g_error_free(error);
+ }
+ else
+ {
+ g_free(data);
+ data = g_strdup(tmp);
+ } // if (error) { ... } else
+ return data;
+}
+
+#endif
+/* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */
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