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PIKApp/plug-ins/script-fu/libscriptfu/scheme-wrapper.c

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Initial checkin of Pika from heckimp
2023-09-26 00:35:21 +02:00
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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 3 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#define DEBUG_SCRIPTS 0
#include "config.h"
#include <string.h>
#include <glib/gstdio.h>
#include <girepository.h>
#include <gtk/gtk.h>
#include "libpika/pika.h"
#include "tinyscheme/scheme-private.h"
#if USE_DL
#include "tinyscheme/dynload.h"
#endif
#include "ftx/ftx.h"
#include "script-fu-types.h"
#include "script-fu-interface.h"
#include "script-fu-regex.h"
#include "script-fu-scripts.h"
#include "script-fu-errors.h"
#include "script-fu-compat.h"
#include "scheme-wrapper.h"
#include "scheme-marshal.h"
#include "scheme-marshal-return.h"
#undef cons
static void ts_init_constants (scheme *sc,
GIRepository *repo);
static void ts_init_enums (scheme *sc,
GIRepository *repo,
const char *namespace);
static void ts_define_procedure (scheme *sc,
const gchar *symbol_name,
TsWrapperFunc func);
static void ts_init_procedures (scheme *sc,
gboolean register_scipts);
static pointer script_fu_marshal_procedure_call (scheme *sc,
pointer a,
gboolean permissive,
gboolean deprecated);
static pointer script_fu_marshal_procedure_call_strict (scheme *sc,
pointer a);
static pointer script_fu_marshal_procedure_call_permissive (scheme *sc,
pointer a);
static pointer script_fu_marshal_procedure_call_deprecated (scheme *sc,
pointer a);
static pointer script_fu_register_call (scheme *sc,
pointer a);
static pointer script_fu_register_call_filter (scheme *sc,
pointer a);
static pointer script_fu_menu_register_call (scheme *sc,
pointer a);
static pointer script_fu_quit_call (scheme *sc,
pointer a);
static pointer script_fu_nil_call (scheme *sc,
pointer a);
static gboolean ts_load_file (const gchar *dirname,
const gchar *basename);
typedef struct
{
const gchar *name;
gint value;
} NamedConstant;
/* LHS is text in a script, RHS is constant defined in C. */
static const NamedConstant script_constants[] =
{
/* Useful values from libpikabase/pikalimits.h */
{ "MIN-IMAGE-SIZE", PIKA_MIN_IMAGE_SIZE },
{ "MAX-IMAGE-SIZE", PIKA_MAX_IMAGE_SIZE },
{ "MIN-RESOLUTION", PIKA_MIN_RESOLUTION },
{ "MAX-RESOLUTION", PIKA_MAX_RESOLUTION },
/* Useful misc stuff */
{ "TRUE", TRUE },
{ "FALSE", FALSE },
/* Builtin units */
{ "UNIT-PIXEL", PIKA_UNIT_PIXEL },
{ "UNIT-INCH", PIKA_UNIT_INCH },
{ "UNIT-MM", PIKA_UNIT_MM },
{ "UNIT-POINT", PIKA_UNIT_POINT },
{ "UNIT-PICA", PIKA_UNIT_PICA },
/* Script-Fu types */
/* Arg types. */
{ "SF-IMAGE", SF_IMAGE },
{ "SF-DRAWABLE", SF_DRAWABLE },
{ "SF-LAYER", SF_LAYER },
{ "SF-CHANNEL", SF_CHANNEL },
{ "SF-VECTORS", SF_VECTORS },
{ "SF-COLOR", SF_COLOR },
{ "SF-TOGGLE", SF_TOGGLE },
{ "SF-VALUE", SF_VALUE },
{ "SF-STRING", SF_STRING },
{ "SF-FILENAME", SF_FILENAME },
{ "SF-DIRNAME", SF_DIRNAME },
{ "SF-ADJUSTMENT", SF_ADJUSTMENT },
{ "SF-FONT", SF_FONT },
{ "SF-PATTERN", SF_PATTERN },
{ "SF-BRUSH", SF_BRUSH },
{ "SF-GRADIENT", SF_GRADIENT },
{ "SF-OPTION", SF_OPTION },
{ "SF-PALETTE", SF_PALETTE },
{ "SF-TEXT", SF_TEXT },
{ "SF-ENUM", SF_ENUM },
{ "SF-DISPLAY", SF_DISPLAY },
/* PDB procedure drawable_arity, i.e. sensitivity.
* Used with script-fu-register-filter.
*
* This declares the arity of the algorithm,
* and not the signature of the PDB procedure.
* Since v3, PDB procedures that are image procedures,
* take a container of drawables.
* This only describes how many drawables the container *should* hold.
*
* For calls invoked by a user, this describes
* how many drawables the user is expected to select,
* which disables/enables the menu item for the procedure.
*
* Procedures are also called from other procedures.
* A call from another procedure may in fact
* pass more drawables than declared for drawable_arity.
* That is a programming error on behalf of the caller.
* A well-written callee that is passed more drawables than declared
* should return an error instead of processing any of the drawables.
*
* Similarly for fewer than declared.
*/
/* Requires two drawables. Often an operation between them, yielding a new drawable */
{ "SF-TWO-OR-MORE-DRAWABLE", SF_TWO_OR_MORE_DRAWABLE },
/* Often processed independently, sequentially, with side effects on the drawables. */
{ "SF-ONE-OR-MORE-DRAWABLE", SF_ONE_OR_MORE_DRAWABLE },
/* Requires exactly one drawable. */
{ "SF-ONE-DRAWABLE", SF_ONE_DRAWABLE },
/* For SF-ADJUSTMENT */
{ "SF-SLIDER", SF_SLIDER },
{ "SF-SPINNER", SF_SPINNER },
{ NULL, 0 }
};
static scheme sc;
/*
* These callbacks break the backwards compile-time dependence
* of inner scheme-wrapper on the outer script-fu-server.
* Only script-fu-server registers, when it runs.
*/
static TsCallbackFunc post_command_callback = NULL;
static TsCallbackFunc quit_callback = NULL;
void
tinyscheme_init (GList *path,
gboolean register_scripts)
{
GIRepository *repo;
GITypelib *typelib;
GError *error = NULL;
/* init the interpreter */
if (! scheme_init (&sc))
{
g_warning ("Could not initialize TinyScheme!");
return;
}
scheme_set_input_port_file (&sc, stdin);
scheme_set_output_port_file (&sc, stdout);
ts_register_output_func (ts_stdout_output_func, NULL);
/* Initialize the TinyScheme extensions */
init_ftx (&sc);
script_fu_regex_init (&sc);
/* Fetch the typelib */
repo = g_irepository_get_default ();
typelib = g_irepository_require (repo, "Pika", NULL, 0, &error);
if (!typelib)
{
g_warning ("%s", error->message);
g_clear_error (&error);
return;
}
/* register in the interpreter the pika functions and types. */
ts_init_constants (&sc, repo);
ts_init_procedures (&sc, register_scripts);
if (path)
{
GList *list;
g_debug ("Loading init and compat scripts.");
for (list = path; list; list = g_list_next (list))
{
gchar *dir = g_file_get_path (list->data);
if (ts_load_file (dir, "script-fu.init"))
{
/* To improve compatibility with older Script-Fu scripts,
* load script-fu-compat.init from the same directory.
*/
ts_load_file (dir, "script-fu-compat.init");
/* To improve compatibility with older PIKA version,
* load plug-in-compat.init from the same directory.
*/
ts_load_file (dir, "plug-in-compat.init");
g_free (dir);
break;
}
g_free (dir);
}
if (list == NULL)
g_warning ("Unable to read initialization file script-fu.init\n");
}
else
g_warning ("Not loading initialization or compatibility scripts.");
}
/* Create an SF-RUN-MODE constant for use in scripts.
* It is set to the run mode state determined by PIKA.
*/
void
ts_set_run_mode (PikaRunMode run_mode)
{
pointer symbol;
symbol = sc.vptr->mk_symbol (&sc, "SF-RUN-MODE");
sc.vptr->scheme_define (&sc, sc.global_env, symbol,
sc.vptr->mk_integer (&sc, run_mode));
sc.vptr->setimmutable (symbol);
}
void
ts_set_print_flag (gint print_flag)
{
sc.print_output = print_flag;
}
void
ts_print_welcome (void)
{
ts_output_string (TS_OUTPUT_NORMAL,
"Welcome to TinyScheme, Version 1.40\n", -1);
ts_output_string (TS_OUTPUT_NORMAL,
"Copyright (c) Dimitrios Souflis\n", -1);
}
void
ts_interpret_stdin (void)
{
scheme_load_file (&sc, stdin);
}
gint
ts_interpret_string (const gchar *expr)
{
gint result;
#if DEBUG_SCRIPTS
sc.print_output = 1;
sc.tracing = 1;
#endif
sc.vptr->load_string (&sc, (char *) expr);
result = sc.retcode;
g_debug ("ts_interpret_string returns: %i", result);
return result;
}
const gchar *
ts_get_success_msg (void)
{
if (sc.vptr->is_string (sc.value))
return sc.vptr->string_value (sc.value);
return "Success";
}
void
ts_stdout_output_func (TsOutputType type,
const char *string,
int len,
gpointer user_data)
{
if (len < 0)
len = strlen (string);
fprintf (stdout, "%.*s", len, string);
fflush (stdout);
}
void
ts_gstring_output_func (TsOutputType type,
const char *string,
int len,
gpointer user_data)
{
GString *gstr = (GString *) user_data;
g_string_append_len (gstr, string, len);
}
void
ts_register_quit_callback (TsCallbackFunc callback)
{
quit_callback = callback;
}
void
ts_register_post_command_callback (TsCallbackFunc callback)
{
post_command_callback = callback;
}
/* private functions */
/*
* Below can be found the functions responsible for registering the
* pika functions and types against the scheme interpreter.
*/
static void
ts_init_constants (scheme *sc,
GIRepository *repo)
{
int i;
pointer symbol;
symbol = sc->vptr->mk_symbol (sc, "pika-directory");
sc->vptr->scheme_define (sc, sc->global_env, symbol,
sc->vptr->mk_string (sc, pika_directory ()));
sc->vptr->setimmutable (symbol);
symbol = sc->vptr->mk_symbol (sc, "pika-data-directory");
sc->vptr->scheme_define (sc, sc->global_env, symbol,
sc->vptr->mk_string (sc, pika_data_directory ()));
sc->vptr->setimmutable (symbol);
symbol = sc->vptr->mk_symbol (sc, "pika-plug-in-directory");
sc->vptr->scheme_define (sc, sc->global_env, symbol,
sc->vptr->mk_string (sc, pika_plug_in_directory ()));
sc->vptr->setimmutable (symbol);
symbol = sc->vptr->mk_symbol (sc, "pika-locale-directory");
sc->vptr->scheme_define (sc, sc->global_env, symbol,
sc->vptr->mk_string (sc, pika_locale_directory ()));
sc->vptr->setimmutable (symbol);
symbol = sc->vptr->mk_symbol (sc, "pika-sysconf-directory");
sc->vptr->scheme_define (sc, sc->global_env, symbol,
sc->vptr->mk_string (sc, pika_sysconf_directory ()));
sc->vptr->setimmutable (symbol);
ts_init_enums (sc, repo, "Pika");
ts_init_enums (sc, repo, "Gegl");
/* Constants used in the register block of scripts */
for (i = 0; script_constants[i].name != NULL; ++i)
{
symbol = sc->vptr->mk_symbol (sc, script_constants[i].name);
sc->vptr->scheme_define (sc, sc->global_env, symbol,
sc->vptr->mk_integer (sc,
script_constants[i].value));
sc->vptr->setimmutable (symbol);
}
/* Define string constant for use in building paths to files/directories */
symbol = sc->vptr->mk_symbol (sc, "DIR-SEPARATOR");
sc->vptr->scheme_define (sc, sc->global_env, symbol,
sc->vptr->mk_string (sc, G_DIR_SEPARATOR_S));
sc->vptr->setimmutable (symbol);
/* Define string constant for use in building search paths */
symbol = sc->vptr->mk_symbol (sc, "SEARCHPATH-SEPARATOR");
sc->vptr->scheme_define (sc, sc->global_env, symbol,
sc->vptr->mk_string (sc, G_SEARCHPATH_SEPARATOR_S));
sc->vptr->setimmutable (symbol);
/* These constants are deprecated and will be removed at a later date. */
symbol = sc->vptr->mk_symbol (sc, "pika-dir");
sc->vptr->scheme_define (sc, sc->global_env, symbol,
sc->vptr->mk_string (sc, pika_directory ()));
sc->vptr->setimmutable (symbol);
symbol = sc->vptr->mk_symbol (sc, "pika-data-dir");
sc->vptr->scheme_define (sc, sc->global_env, symbol,
sc->vptr->mk_string (sc, pika_data_directory ()));
sc->vptr->setimmutable (symbol);
symbol = sc->vptr->mk_symbol (sc, "pika-plugin-dir");
sc->vptr->scheme_define (sc, sc->global_env, symbol,
sc->vptr->mk_string (sc, pika_plug_in_directory ()));
sc->vptr->setimmutable (symbol);
}
static void
ts_init_enum (scheme *sc,
GIEnumInfo *info,
const char *namespace)
{
int n_values;
n_values = g_enum_info_get_n_values ((GIEnumInfo *) info);
for (int j = 0; j < n_values; j++)
{
GIValueInfo *value_info;
const char *c_identifier;
char *scheme_name;
int int_value;
pointer symbol;
value_info = g_enum_info_get_value (info, j);
/* Get name & value. Normally, we would use the actual name of the
* GIBaseInfo here, but that would break bw-compatibility */
c_identifier = g_base_info_get_attribute ((GIBaseInfo *) value_info, "c:identifier");
if (c_identifier == NULL)
{
g_warning ("Problem in the GIR file: enum value without \"c:identifier\"!");
g_base_info_unref ((GIBaseInfo *) value_info);
continue;
}
/* Scheme-ify the name */
if (g_strcmp0 (namespace, "Pika") == 0)
{
/* Skip the PIKA prefix for PIKA enums */
if (g_str_has_prefix (c_identifier, "PIKA_"))
c_identifier += strlen ("PIKA_");
}
else
{
/* Other namespaces: skip non-prefixed symbols, to prevent clashes */
if (g_ascii_strncasecmp (c_identifier, namespace, strlen (namespace)) != 0)
{
g_base_info_unref ((GIBaseInfo *) value_info);
continue;
}
}
scheme_name = g_strdelimit (g_strdup (c_identifier), "_", '-');
int_value = g_value_info_get_value (value_info);
/* Register the symbol */
symbol = sc->vptr->mk_symbol (sc, scheme_name);
sc->vptr->scheme_define (sc, sc->global_env, symbol,
sc->vptr->mk_integer (sc, int_value));
sc->vptr->setimmutable (symbol);
g_free (scheme_name);
g_base_info_unref ((GIBaseInfo *) value_info);
}
}
static void
ts_init_enums (scheme *sc,
GIRepository *repo,
const char *namespace)
{
int i, n_infos;
n_infos = g_irepository_get_n_infos (repo, namespace);
for (i = 0; i < n_infos; i++)
{
GIBaseInfo *info;
info = g_irepository_get_info (repo, namespace, i);
if (GI_IS_ENUM_INFO (info))
{
ts_init_enum (sc, (GIEnumInfo *) info, namespace);
}
g_base_info_unref (info);
}
}
/* Define a symbol into interpreter state,
* bound to a foreign function, language C, defined here in ScriptFu source.
*/
static void
ts_define_procedure (scheme *sc,
const gchar *symbol_name,
TsWrapperFunc func)
{
pointer symbol;
symbol = sc->vptr->mk_symbol (sc, symbol_name);
sc->vptr->scheme_define (sc, sc->global_env, symbol,
sc->vptr->mk_foreign_func (sc, func));
sc->vptr->setimmutable (symbol);
}
/* Define, into interpreter state,
* 1) Scheme functions that call wrapper functions in C here in ScriptFu.
* 2) Scheme functions wrapping every procedure in the PDB.
*/
static void
ts_init_procedures (scheme *sc,
gboolean register_scripts)
{
gchar **proc_list;
gint num_procs;
gint i;
#if USE_DL
/* scm_load_ext not same as other wrappers, defined in tinyscheme/dynload */
ts_define_procedure (sc, "load-extension", scm_load_ext);
#endif
if (register_scripts)
{
ts_define_procedure (sc, "script-fu-register", script_fu_register_call);
ts_define_procedure (sc, "script-fu-register-filter", script_fu_register_call_filter);
ts_define_procedure (sc, "script-fu-menu-register", script_fu_menu_register_call);
}
else
{
ts_define_procedure (sc, "script-fu-register", script_fu_nil_call);
ts_define_procedure (sc, "script-fu-register-filter", script_fu_nil_call);
ts_define_procedure (sc, "script-fu-menu-register", script_fu_nil_call);
}
ts_define_procedure (sc, "script-fu-quit", script_fu_quit_call);
ts_define_procedure (sc, "pika-proc-db-call", script_fu_marshal_procedure_call_strict);
ts_define_procedure (sc, "-pika-proc-db-call", script_fu_marshal_procedure_call_permissive);
ts_define_procedure (sc, "--pika-proc-db-call", script_fu_marshal_procedure_call_deprecated);
proc_list = pika_pdb_query_procedures (pika_get_pdb (),
".*", ".*", ".*", ".*",
".*", ".*", ".*", ".*");
num_procs = proc_list ? g_strv_length (proc_list) : 0;
/* Register each procedure as a scheme func */
for (i = 0; i < num_procs; i++)
{
gchar *buff;
/* Build a define that will call the foreign function.
* The Scheme statement was suggested by Simon Budig.
*
* Call the procedure through -pika-proc-db-call, which is a more
* permissive version of pika-proc-db-call, that accepts (and ignores)
* any number of arguments for nullary procedures, for backward
* compatibility.
*/
buff = g_strdup_printf (" (define (%s . args)"
" (apply -pika-proc-db-call \"%s\" args))",
proc_list[i], proc_list[i]);
/* Execute the 'define' */
sc->vptr->load_string (sc, buff);
g_free (buff);
}
g_strfreev (proc_list);
/* Register more scheme funcs that call PDB procedures, for compatibility
* This can overwrite earlier scheme func definitions.
*/
define_compat_procs (sc);
}
static gboolean
ts_load_file (const gchar *dirname,
const gchar *basename)
{
gchar *filename;
FILE *fin;
filename = g_build_filename (dirname, basename, NULL);
fin = g_fopen (filename, "rb");
g_free (filename);
if (fin)
{
scheme_load_file (&sc, fin);
fclose (fin);
return TRUE;
}
return FALSE;
}
/* Called by the Scheme interpreter on calls to PIKA PDB procedures */
static pointer
script_fu_marshal_procedure_call (scheme *sc,
pointer a,
gboolean permissive,
gboolean deprecated)
{
PikaProcedure *procedure;
PikaValueArray *args;
PikaValueArray *values = NULL;
gchar *proc_name;
GParamSpec **arg_specs;
gint n_arg_specs;
gint actual_arg_count;
gint consumed_arg_count = 0;
gchar error_str[1024];
gint i;
pointer return_val = sc->NIL;
g_debug ("In %s()", G_STRFUNC);
if (a == sc->NIL)
/* Some ScriptFu function is calling this incorrectly. */
return implementation_error (sc,
"Procedure argument marshaller was called with no arguments. "
"The procedure to be executed and the arguments it requires "
"(possibly none) must be specified.",
0);
/* The PDB procedure name is the argument or first argument of the list */
if (sc->vptr->is_pair (a))
proc_name = g_strdup (sc->vptr->string_value (sc->vptr->pair_car (a)));
else
proc_name = g_strdup (sc->vptr->string_value (a));
g_debug ("proc name: %s", proc_name);
g_debug ("parms rcvd: %d", sc->vptr->list_length (sc, a)-1);
if (deprecated )
g_warning ("PDB procedure name %s is deprecated, please use %s.",
deprecated_name_for (proc_name),
proc_name);
/* report the current command */
script_fu_interface_report_cc (proc_name);
/* Attempt to fetch the procedure from the database */
procedure = pika_pdb_lookup_procedure (pika_get_pdb (), proc_name);
if (! procedure)
{
g_snprintf (error_str, sizeof (error_str),
"Invalid procedure name: %s", proc_name);
return script_error (sc, error_str, 0);
}
arg_specs = pika_procedure_get_arguments (procedure, &n_arg_specs);
actual_arg_count = sc->vptr->list_length (sc, a) - 1;
/* Check the supplied number of arguments.
* This only gives warnings to the console.
* It does not ensure that the count of supplied args equals the count of formal args.
* Subsequent code must not assume that.
*
* When too few supplied args, when permissive, scriptfu or downstream machinery
* can try to provide missing args e.g. defaults.
*
* Extra supplied args can be discarded.
* Formerly, this was a deprecated behavior depending on "permissive".
*/
{
if (actual_arg_count > n_arg_specs)
{
/* Warn, but permit extra args. Will discard args from script.*/
g_warning ("in script, permitting too many args to %s", proc_name);
}
else if (actual_arg_count < n_arg_specs)
{
/* Warn, but permit too few args.
* Scriptfu or downstream might provide missing args.
* It is author friendly to continue to parse the script for type errors.
*/
g_warning ("in script, permitting too few args to %s", proc_name);
}
/* else equal counts of args. */
}
/* Marshall the supplied arguments */
args = pika_value_array_new (n_arg_specs);
for (i = 0; i < n_arg_specs; i++)
{
GParamSpec *arg_spec = arg_specs[i];
GValue value = G_VALUE_INIT;
guint n_elements; /* !!! unsigned length */
pointer vector; /* !!! list or vector */
gint j;
consumed_arg_count++;
if (consumed_arg_count > actual_arg_count)
{
/* Exhausted supplied arguments before formal specs. */
/* Say formal type of first missing arg. */
g_warning ("Missing arg type: %s", g_type_name (G_PARAM_SPEC_VALUE_TYPE (arg_spec)));
/* Break loop over formal specs. Continuation is to call PDB with partial args. */
break;
}
else
a = sc->vptr->pair_cdr (a); /* advance pointer to next arg in list. */
g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (arg_spec));
debug_in_arg (sc, a, i, g_type_name (G_VALUE_TYPE (&value)));
if (G_VALUE_HOLDS_INT (&value))
{
if (! sc->vptr->is_number (sc->vptr->pair_car (a)))
return script_type_error (sc, "numeric", i, proc_name);
else
g_value_set_int (&value,
sc->vptr->ivalue (sc->vptr->pair_car (a)));
}
else if (G_VALUE_HOLDS_UINT (&value))
{
if (! sc->vptr->is_number (sc->vptr->pair_car (a)))
return script_type_error (sc, "numeric", i, proc_name);
else
g_value_set_uint (&value,
sc->vptr->ivalue (sc->vptr->pair_car (a)));
}
else if (G_VALUE_HOLDS_UCHAR (&value))
{
if (! sc->vptr->is_number (sc->vptr->pair_car (a)))
return script_type_error (sc, "numeric", i, proc_name);
else
g_value_set_uchar (&value,
sc->vptr->ivalue (sc->vptr->pair_car (a)));
}
else if (G_VALUE_HOLDS_DOUBLE (&value))
{
if (! sc->vptr->is_number (sc->vptr->pair_car (a)))
return script_type_error (sc, "numeric", i, proc_name);
else
g_value_set_double (&value,
sc->vptr->rvalue (sc->vptr->pair_car (a)));
}
else if (G_VALUE_HOLDS_ENUM (&value))
{
if (! sc->vptr->is_number (sc->vptr->pair_car (a)))
return script_type_error (sc, "numeric", i, proc_name);
else
g_value_set_enum (&value,
sc->vptr->ivalue (sc->vptr->pair_car (a)));
}
else if (G_VALUE_HOLDS_BOOLEAN (&value))
{
if (! sc->vptr->is_number (sc->vptr->pair_car (a)))
return script_type_error (sc, "numeric", i, proc_name);
else
g_value_set_boolean (&value,
sc->vptr->ivalue (sc->vptr->pair_car (a)));
}
else if (G_VALUE_HOLDS_STRING (&value))
{
if (! sc->vptr->is_string (sc->vptr->pair_car (a)))
return script_type_error (sc, "string", i, proc_name);
else
g_value_set_string (&value,
sc->vptr->string_value (sc->vptr->pair_car (a)));
}
else if (G_VALUE_HOLDS (&value, G_TYPE_STRV))
{
vector = sc->vptr->pair_car (a); /* vector is pointing to a list */
if (! sc->vptr->is_list (sc, vector))
return script_type_error (sc, "vector", i, proc_name);
else
{
gchar **array;
n_elements = sc->vptr->list_length (sc, vector);
array = g_new0 (gchar *, n_elements + 1);
for (j = 0; j < n_elements; j++)
{
pointer v_element = sc->vptr->pair_car (vector);
if (!sc->vptr->is_string (v_element))
{
g_snprintf (error_str, sizeof (error_str),
"Item %d in vector is not a string (argument %d for function %s)",
j+1, i+1, proc_name);
g_strfreev (array);
return foreign_error (sc, error_str, vector);
}
array[j] = g_strdup (sc->vptr->string_value (v_element));
vector = sc->vptr->pair_cdr (vector);
}
g_value_take_boxed (&value, array);
#if DEBUG_MARSHALL
{
glong count = sc->vptr->list_length ( sc, sc->vptr->pair_car (a) );
g_printerr (" string vector has %ld elements\n", count);
if (count > 0)
{
g_printerr (" ");
for (j = 0; j < count; ++j)
g_printerr (" \"%s\"",
args[i].data.d_strv[j]);
g_printerr ("\n");
}
}
#endif
}
}
else if (PIKA_VALUE_HOLDS_DISPLAY (&value))
{
if (! sc->vptr->is_number (sc->vptr->pair_car (a)))
return script_type_error (sc, "numeric", i, proc_name);
else
{
PikaDisplay *display =
pika_display_get_by_id (sc->vptr->ivalue (sc->vptr->pair_car (a)));
g_value_set_object (&value, display);
}
}
else if (PIKA_VALUE_HOLDS_IMAGE (&value))
{
if (! sc->vptr->is_number (sc->vptr->pair_car (a)))
return script_type_error (sc, "numeric", i, proc_name);
else
{
PikaImage *image =
pika_image_get_by_id (sc->vptr->ivalue (sc->vptr->pair_car (a)));
g_value_set_object (&value, image);
}
}
else if (PIKA_VALUE_HOLDS_LAYER (&value))
{
if (! sc->vptr->is_number (sc->vptr->pair_car (a)))
return script_type_error (sc, "numeric", i, proc_name);
else
{
PikaLayer *layer =
pika_layer_get_by_id (sc->vptr->ivalue (sc->vptr->pair_car (a)));
g_value_set_object (&value, layer);
}
}
else if (PIKA_VALUE_HOLDS_LAYER_MASK (&value))
{
if (! sc->vptr->is_number (sc->vptr->pair_car (a)))
return script_type_error (sc, "numeric", i, proc_name);
else
{
PikaLayerMask *layer_mask =
pika_layer_mask_get_by_id (sc->vptr->ivalue (sc->vptr->pair_car (a)));
g_value_set_object (&value, layer_mask);
}
}
else if (PIKA_VALUE_HOLDS_CHANNEL (&value))
{
if (! sc->vptr->is_number (sc->vptr->pair_car (a)))
return script_type_error (sc, "numeric", i, proc_name);
else
{
PikaChannel *channel =
pika_channel_get_by_id (sc->vptr->ivalue (sc->vptr->pair_car (a)));
g_value_set_object (&value, channel);
}
}
else if (PIKA_VALUE_HOLDS_DRAWABLE (&value))
{
if (! sc->vptr->is_number (sc->vptr->pair_car (a)))
return script_type_error (sc, "numeric", i, proc_name);
else
{
gint id = sc->vptr->ivalue (sc->vptr->pair_car (a));
pointer error = marshal_ID_to_drawable(sc, a, id, &value);
if (error)
return error;
}
}
else if (PIKA_VALUE_HOLDS_VECTORS (&value))
{
if (! sc->vptr->is_number (sc->vptr->pair_car (a)))
return script_type_error (sc, "numeric", i, proc_name);
else
{
PikaVectors *vectors =
pika_vectors_get_by_id (sc->vptr->ivalue (sc->vptr->pair_car (a)));
g_value_set_object (&value, vectors);
}
}
else if (PIKA_VALUE_HOLDS_ITEM (&value))
{
if (! sc->vptr->is_number (sc->vptr->pair_car (a)))
return script_type_error (sc, "numeric", i, proc_name);
else
{
gint item_ID;
item_ID = sc->vptr->ivalue (sc->vptr->pair_car (a));
/* Avoid failed assertion in libpika.*/
if (pika_item_id_is_valid (item_ID))
{
PikaItem *item = pika_item_get_by_id (item_ID);
g_value_set_object (&value, item);
}
else
{
return script_error (sc, "runtime: invalid item ID", a);
}
}
}
else if (PIKA_VALUE_HOLDS_INT32_ARRAY (&value))
{
vector = sc->vptr->pair_car (a);
if (! sc->vptr->is_vector (vector))
return script_type_error (sc, "vector", i, proc_name);
else
{
/* !!! Comments applying to all array args.
* n_elements is expected list length, from previous argument.
* A PDB procedure takes args paired: ...length, array...
* and a script passes the same paired args (..., 1, '("foo"))
* (FUTURE: a more object oriented design for the PDB API
* would obviate need for this discussion.)
*
* When a script passes a shorter or empty list,
* ensure we don't segfault on cdr past end of list.
*
* n_elements is unsigned, we don't need to check >= 0
*
* Since we are not checking for equality of passed length
* to actual container length, we adapt an array
* that is shorter than specified by the length arg.
* Ignoring a discrepancy by the script author.
* FUTURE: List must be *exactly* n_elements long.
* n_elements != sc->vptr->list_length (sc, vector))
*/
gint32 *array;
n_elements = PIKA_VALUES_GET_INT (args, i - 1);
if (n_elements > sc->vptr->vector_length (vector))
return script_length_error_in_vector (sc, i, proc_name, n_elements, vector);
array = g_new0 (gint32, n_elements);
for (j = 0; j < n_elements; j++)
{
pointer v_element = sc->vptr->vector_elem (vector, j);
/* FIXME: Check values in vector stay within range for each type. */
if (! sc->vptr->is_number (v_element))
{
g_free (array);
return script_type_error_in_container (sc, "numeric", i, j, proc_name, vector);
}
array[j] = (gint32) sc->vptr->ivalue (v_element);
}
pika_value_take_int32_array (&value, array, n_elements);
debug_vector (sc, vector, "%ld");
}
}
else if (G_VALUE_HOLDS (&value, G_TYPE_BYTES))
{
vector = sc->vptr->pair_car (a);
if (! sc->vptr->is_vector (vector))
return script_type_error (sc, "vector", i, proc_name);
else
{
guint8 *array;
n_elements = sc->vptr->vector_length (vector);
array = g_new0 (guint8, n_elements);
for (j = 0; j < n_elements; j++)
{
pointer v_element = sc->vptr->vector_elem (vector, j);
if (!sc->vptr->is_number (v_element))
{
g_free (array);
return script_type_error_in_container (sc, "numeric", i, j, proc_name, vector);
}
array[j] = (guint8) sc->vptr->ivalue (v_element);
}
g_value_take_boxed (&value, g_bytes_new_take (array, n_elements));
debug_vector (sc, vector, "%ld");
}
}
else if (PIKA_VALUE_HOLDS_FLOAT_ARRAY (&value))
{
vector = sc->vptr->pair_car (a);
if (! sc->vptr->is_vector (vector))
return script_type_error (sc, "vector", i, proc_name);
else
{
gdouble *array;
n_elements = PIKA_VALUES_GET_INT (args, i - 1);
if (n_elements > sc->vptr->vector_length (vector))
return script_length_error_in_vector (sc, i, proc_name, n_elements, vector);
array = g_new0 (gdouble, n_elements);
for (j = 0; j < n_elements; j++)
{
pointer v_element = sc->vptr->vector_elem (vector, j);
if (!sc->vptr->is_number (v_element))
{
g_free (array);
return script_type_error_in_container (sc, "numeric", i, j, proc_name, vector);
}
array[j] = (gfloat) sc->vptr->rvalue (v_element);
}
pika_value_take_float_array (&value, array, n_elements);
debug_vector (sc, vector, "%f");
}
}
else if (PIKA_VALUE_HOLDS_RGB (&value))
{
PikaRGB color;
if (sc->vptr->is_string (sc->vptr->pair_car (a)))
{
if (! pika_rgb_parse_css (&color,
sc->vptr->string_value (sc->vptr->pair_car (a)),
-1))
return script_type_error (sc, "color string", i, proc_name);
pika_rgb_set_alpha (&color, 1.0);
g_debug ("(%s)", sc->vptr->string_value (sc->vptr->pair_car (a)));
}
else if (sc->vptr->is_list (sc, sc->vptr->pair_car (a)) &&
sc->vptr->list_length (sc, sc->vptr->pair_car (a)) == 3)
{
pointer color_list;
guchar r = 0, g = 0, b = 0;
color_list = sc->vptr->pair_car (a);
if (sc->vptr->is_number (sc->vptr->pair_car (color_list)))
r = CLAMP (sc->vptr->ivalue (sc->vptr->pair_car (color_list)),
0, 255);
else
return script_type_error_in_container (
sc, "numeric", i, 0, proc_name, 0);
color_list = sc->vptr->pair_cdr (color_list);
if (sc->vptr->is_number (sc->vptr->pair_car (color_list)))
g = CLAMP (sc->vptr->ivalue (sc->vptr->pair_car (color_list)),
0, 255);
else
return script_type_error_in_container (
sc, "numeric", i, 1, proc_name, 0);
color_list = sc->vptr->pair_cdr (color_list);
if (sc->vptr->is_number (sc->vptr->pair_car (color_list)))
b = CLAMP (sc->vptr->ivalue (sc->vptr->pair_car (color_list)),
0, 255);
else
return script_type_error_in_container (sc, "numeric", i, 2, proc_name, 0);
pika_rgba_set_uchar (&color, r, g, b, 255);
pika_value_set_rgb (&value, &color);
g_debug ("(%d %d %d)", r, g, b);
}
else
return script_type_error (sc, "color string or list", i, proc_name);
}
else if (PIKA_VALUE_HOLDS_RGB_ARRAY (&value))
{
vector = sc->vptr->pair_car (a);
if (! sc->vptr->is_vector (vector))
return script_type_error (sc, "vector", i, proc_name);
else
{
PikaRGB *array;
n_elements = PIKA_VALUES_GET_INT (args, i - 1);
if (n_elements > sc->vptr->vector_length (vector))
return script_length_error_in_vector (sc, i, proc_name, n_elements, vector);
array = g_new0 (PikaRGB, n_elements);
for (j = 0; j < n_elements; j++)
{
pointer v_element = sc->vptr->vector_elem (vector, j);
pointer color_list;
guchar r, g, b;
if (! (sc->vptr->is_list (sc,
sc->vptr->pair_car (v_element)) &&
sc->vptr->list_length (sc,
sc->vptr->pair_car (v_element)) == 3))
{
g_free (array);
g_snprintf (error_str, sizeof (error_str),
"Item %d in vector is not a color "
"(argument %d for function %s)",
j+1, i+1, proc_name);
return script_error (sc, error_str, 0);
}
color_list = sc->vptr->pair_car (v_element);
r = CLAMP (sc->vptr->ivalue (sc->vptr->pair_car (color_list)),
0, 255);
color_list = sc->vptr->pair_cdr (color_list);
g = CLAMP (sc->vptr->ivalue (sc->vptr->pair_car (color_list)),
0, 255);
color_list = sc->vptr->pair_cdr (color_list);
b = CLAMP (sc->vptr->ivalue (sc->vptr->pair_car (color_list)),
0, 255);
pika_rgba_set_uchar (&array[i], r, g, b, 255);
}
pika_value_take_rgb_array (&value, array, n_elements);
g_debug ("color vector has %ld elements", sc->vptr->vector_length (vector));
}
}
else if (PIKA_VALUE_HOLDS_PARASITE (&value))
{
if (! sc->vptr->is_list (sc, sc->vptr->pair_car (a)) ||
sc->vptr->list_length (sc, sc->vptr->pair_car (a)) != 3)
return script_type_error (sc, "list", i, proc_name);
else
{
PikaParasite parasite;
pointer temp_val;
/* parasite->name */
temp_val = sc->vptr->pair_car (a);
if (! sc->vptr->is_string (sc->vptr->pair_car (temp_val)))
return script_type_error_in_container (sc, "string", i, 0, proc_name, 0);
parasite.name =
sc->vptr->string_value (sc->vptr->pair_car (temp_val));
g_debug ("name '%s'", parasite.name);
/* parasite->flags */
temp_val = sc->vptr->pair_cdr (temp_val);
if (! sc->vptr->is_number (sc->vptr->pair_car (temp_val)))
return script_type_error_in_container (sc, "numeric", i, 1, proc_name, 0);
parasite.flags =
sc->vptr->ivalue (sc->vptr->pair_car (temp_val));
g_debug ("flags %d", parasite.flags);
/* parasite->data */
temp_val = sc->vptr->pair_cdr (temp_val);
if (!sc->vptr->is_string (sc->vptr->pair_car (temp_val)))
return script_type_error_in_container (
sc, "string", i, 2, proc_name, 0);
parasite.data =
sc->vptr->string_value (sc->vptr->pair_car (temp_val));
parasite.size = strlen (parasite.data);
g_debug ("size %d", parasite.size);
g_debug ("data '%s'", (char *)parasite.data);
g_value_set_boxed (&value, &parasite);
}
}
else if (PIKA_VALUE_HOLDS_OBJECT_ARRAY (&value))
{
vector = sc->vptr->pair_car (a);
if (sc->vptr->is_vector (vector))
{
pointer error = marshal_vector_to_drawable_array (sc, vector, &value);
if (error)
return error;
}
else
return script_type_error (sc, "vector", i, proc_name);
}
else if (G_VALUE_TYPE (&value) == G_TYPE_FILE)
{
if (! sc->vptr->is_string (sc->vptr->pair_car (a)))
return script_type_error (sc, "string for path", i, proc_name);
marshal_path_string_to_gfile (sc, a, &value);
}
else if (G_VALUE_TYPE (&value) == PIKA_TYPE_PDB_STATUS_TYPE)
{
/* A PDB procedure signature wrongly requires a status. */
return implementation_error (sc,
"Status is for return types, not arguments",
sc->vptr->pair_car (a));
}
else if (PIKA_VALUE_HOLDS_RESOURCE (&value))
{
if (! sc->vptr->is_integer (sc->vptr->pair_car (a)))
return script_type_error (sc, "integer", i, proc_name);
else
{
/* Create new instance of a resource object. */
PikaResource *resource;
gint resource_id = sc->vptr->ivalue (sc->vptr->pair_car (a));
/* Superclass is Resource, subclass is e.g. Brush.
* Superclass is abstract, can't instantiate it.
* This returns an instance of the appropriate subclass for the ID.
* ID's are unique across all instances of Resource.
*/
resource = pika_resource_get_by_id (resource_id);
g_value_set_object (&value, resource);
}
}
else
{
g_snprintf (error_str, sizeof (error_str),
"Argument %d for %s is unhandled type %s",
i+1, proc_name, g_type_name (G_VALUE_TYPE (&value)));
return implementation_error (sc, error_str, 0);
}
debug_gvalue (&value);
pika_value_array_append (args, &value);
g_value_unset (&value);
}
/* Omit refresh scripts from a script, better than crashing, see #575830. */
if (strcmp (proc_name, "script-fu-refresh") == 0)
return script_error (sc, "A script cannot refresh scripts", 0);
g_debug ("calling %s", proc_name);
values = pika_pdb_run_procedure_array (pika_get_pdb (),
proc_name, args);
g_debug ("done.");
/* Check the return status */
if (! values)
{
/* Usually a plugin that crashed, wire error */
g_snprintf (error_str, sizeof(error_str),
"in script, called procedure %s failed to return a status",
proc_name);
return script_error (sc, error_str, 0);
}
{
pointer calling_error;
return_val = marshal_PDB_return (sc, values, proc_name, &calling_error);
/* Now returns error immediately.
* Which leaks memory normally freed below.
* Most plugins, except extension script-fu, will exit soon anyway.
* FUTURE: don't leak.
*/
if (calling_error != NULL)
/* calling error is foreign_error or similar. */
return calling_error;
}
g_free (proc_name);
/* free executed procedure return values */
pika_value_array_unref (values);
/* free arguments and values */
pika_value_array_unref (args);
/* The callback is NULL except for script-fu-server. See explanation there. */
if (post_command_callback != NULL)
post_command_callback ();
#ifdef GDK_WINDOWING_WIN32
/* This seems to help a lot on Windoze. */
while (gtk_events_pending ())
gtk_main_iteration ();
#endif
return return_val;
}
static pointer
script_fu_marshal_procedure_call_strict (scheme *sc,
pointer a)
{
return script_fu_marshal_procedure_call (sc, a, FALSE, FALSE);
}
static pointer
script_fu_marshal_procedure_call_permissive (scheme *sc,
pointer a)
{
return script_fu_marshal_procedure_call (sc, a, TRUE, FALSE);
}
static pointer
script_fu_marshal_procedure_call_deprecated (scheme *sc,
pointer a)
{
return script_fu_marshal_procedure_call (sc, a, TRUE, TRUE);
}
static pointer
script_fu_register_call (scheme *sc,
pointer a)
{
return script_fu_add_script (sc, a);
}
static pointer
script_fu_register_call_filter (scheme *sc,
pointer a)
{
return script_fu_add_script_filter (sc, a);
}
static pointer
script_fu_menu_register_call (scheme *sc,
pointer a)
{
return script_fu_add_menu (sc, a);
}
static pointer
script_fu_quit_call (scheme *sc,
pointer a)
{
/* If script-fu-server running, tell it. */
if (quit_callback != NULL)
quit_callback ();
scheme_deinit (sc);
return sc->NIL;
}
static pointer
script_fu_nil_call (scheme *sc,
pointer a)
{
return sc->NIL;
}