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gimp/libgimp/gimpplugin-private.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-2003 Peter Mattis and Spencer Kimball
*
* gimpplugin-private.c
* Copyright (C) 2019 Michael Natterer <mitch@gimp.org>
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gimp.h"
#include "libgimpbase/gimpprotocol.h"
#include "libgimpbase/gimpwire.h"
#include "gimp-private.h"
#include "gimp-shm.h"
#include "gimpgpparams.h"
#include "gimpplugin-private.h"
#include "gimpplugin_pdb.h"
/* local function prototpes */
static void gimp_plug_in_register (GimpPlugIn *plug_in,
GList *procedures);
static void gimp_plug_in_loop (GimpPlugIn *plug_in);
static void gimp_plug_in_process_message (GimpPlugIn *plug_in,
GimpWireMessage *msg);
static void gimp_plug_in_proc_run (GimpPlugIn *plug_in,
GPProcRun *proc_run);
static void gimp_plug_in_temp_proc_run (GimpPlugIn *plug_in,
GPProcRun *proc_run);
static void gimp_plug_in_proc_run_internal (GPProcRun *proc_run,
GimpProcedure *procedure,
GPProcReturn *proc_return);
static gboolean gimp_plug_in_io_error_handler (GIOChannel *channel,
GIOCondition cond,
gpointer data);
/* public functions */
void
_gimp_plug_in_query (GimpPlugIn *plug_in)
{
g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
if (GIMP_PLUG_IN_GET_CLASS (plug_in)->init_procedures)
gp_has_init_write (plug_in->priv->write_channel, plug_in);
if (GIMP_PLUG_IN_GET_CLASS (plug_in)->query_procedures)
{
GList *procedures =
GIMP_PLUG_IN_GET_CLASS (plug_in)->query_procedures (plug_in);
gimp_plug_in_register (plug_in, procedures);
}
}
void
_gimp_plug_in_init (GimpPlugIn *plug_in)
{
g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
if (GIMP_PLUG_IN_GET_CLASS (plug_in)->init_procedures)
{
GList *procedures =
GIMP_PLUG_IN_GET_CLASS (plug_in)->init_procedures (plug_in);
gimp_plug_in_register (plug_in, procedures);
}
}
void
_gimp_plug_in_run (GimpPlugIn *plug_in)
{
g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
g_io_add_watch (plug_in->priv->read_channel,
G_IO_ERR | G_IO_HUP,
gimp_plug_in_io_error_handler,
NULL);
gimp_plug_in_loop (plug_in);
}
void
_gimp_plug_in_quit (GimpPlugIn *plug_in)
{
g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
if (GIMP_PLUG_IN_GET_CLASS (plug_in)->quit)
GIMP_PLUG_IN_GET_CLASS (plug_in)->quit (plug_in);
_gimp_shm_close ();
gp_quit_write (plug_in->priv->write_channel, plug_in);
}
GIOChannel *
_gimp_plug_in_get_read_channel (GimpPlugIn *plug_in)
{
g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), NULL);
return plug_in->priv->read_channel;
}
GIOChannel *
_gimp_plug_in_get_write_channel (GimpPlugIn *plug_in)
{
g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), NULL);
return plug_in->priv->write_channel;
}
void
_gimp_plug_in_read_expect_msg (GimpPlugIn *plug_in,
GimpWireMessage *msg,
gint type)
{
g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
while (TRUE)
{
if (! gimp_wire_read_msg (plug_in->priv->read_channel, msg, NULL))
gimp_quit ();
if (msg->type == type)
return; /* up to the caller to call wire_destroy() */
if (msg->type == GP_TEMP_PROC_RUN || msg->type == GP_QUIT)
{
gimp_plug_in_process_message (plug_in, msg);
}
else
{
g_error ("unexpected message: %d", msg->type);
}
gimp_wire_destroy (msg);
}
}
gboolean
_gimp_plug_in_extension_read (GIOChannel *channel,
GIOCondition condition,
gpointer data)
{
GimpPlugIn *plug_in = data;
_gimp_plug_in_single_message (plug_in);
return G_SOURCE_CONTINUE;
}
/* private functions */
static void
gimp_plug_in_register (GimpPlugIn *plug_in,
GList *procedures)
{
GList *list;
for (list = procedures; list; list = g_list_next (list))
{
const gchar *name = list->data;
GimpProcedure *procedure;
procedure = gimp_plug_in_create_procedure (plug_in, name);
if (procedure)
{
GIMP_PROCEDURE_GET_CLASS (procedure)->install (procedure);
g_object_unref (procedure);
}
else
{
g_warning ("Plug-in failed to create procedure '%s'\n", name);
}
}
g_list_free_full (procedures, g_free);
if (plug_in->priv->translation_domain_name)
{
gchar *path = g_file_get_path (plug_in->priv->translation_domain_path);
_gimp_plugin_domain_register (plug_in->priv->translation_domain_name,
path);
g_free (path);
}
if (plug_in->priv->help_domain_name)
{
gchar *uri = g_file_get_uri (plug_in->priv->help_domain_uri);
_gimp_plugin_help_register (plug_in->priv->help_domain_name,
uri);
g_free (uri);
}
for (list = plug_in->priv->menu_branches; list; list = g_list_next (list))
{
GimpPlugInMenuBranch *branch = list->data;
_gimp_plugin_menu_branch_register (branch->menu_path,
branch->menu_label);
}
}
static void
gimp_plug_in_loop (GimpPlugIn *plug_in)
{
while (TRUE)
{
GimpWireMessage msg;
if (! gimp_wire_read_msg (plug_in->priv->read_channel, &msg, NULL))
return;
switch (msg.type)
{
case GP_QUIT:
gimp_wire_destroy (&msg);
return;
case GP_CONFIG:
_gimp_config (msg.data);
break;
case GP_TILE_REQ:
case GP_TILE_ACK:
case GP_TILE_DATA:
g_warning ("unexpected tile message received (should not happen)");
break;
case GP_PROC_RUN:
gimp_plug_in_proc_run (plug_in, msg.data);
gimp_wire_destroy (&msg);
return;
case GP_PROC_RETURN:
g_warning ("unexpected proc return message received (should not happen)");
break;
case GP_TEMP_PROC_RUN:
g_warning ("unexpected temp proc run message received (should not happen");
break;
case GP_TEMP_PROC_RETURN:
g_warning ("unexpected temp proc return message received (should not happen");
break;
case GP_PROC_INSTALL:
g_warning ("unexpected proc install message received (should not happen)");
break;
case GP_HAS_INIT:
g_warning ("unexpected has init message received (should not happen)");
break;
}
gimp_wire_destroy (&msg);
}
}
void
_gimp_plug_in_single_message (GimpPlugIn *plug_in)
{
GimpWireMessage msg;
/* Run a temp function */
if (! gimp_wire_read_msg (plug_in->priv->read_channel, &msg, NULL))
gimp_quit ();
gimp_plug_in_process_message (plug_in, &msg);
gimp_wire_destroy (&msg);
}
static void
gimp_plug_in_process_message (GimpPlugIn *plug_in,
GimpWireMessage *msg)
{
switch (msg->type)
{
case GP_QUIT:
gimp_quit ();
break;
case GP_CONFIG:
_gimp_config (msg->data);
break;
case GP_TILE_REQ:
case GP_TILE_ACK:
case GP_TILE_DATA:
g_warning ("unexpected tile message received (should not happen)");
break;
case GP_PROC_RUN:
g_warning ("unexpected proc run message received (should not happen)");
break;
case GP_PROC_RETURN:
g_warning ("unexpected proc return message received (should not happen)");
break;
case GP_TEMP_PROC_RUN:
gimp_plug_in_temp_proc_run (plug_in, msg->data);
break;
case GP_TEMP_PROC_RETURN:
g_warning ("unexpected temp proc return message received (should not happen)");
break;
case GP_PROC_INSTALL:
g_warning ("unexpected proc install message received (should not happen)");
break;
case GP_HAS_INIT:
g_warning ("unexpected has init message received (should not happen)");
break;
}
}
static void
gimp_plug_in_proc_run (GimpPlugIn *plug_in,
GPProcRun *proc_run)
{
GPProcReturn proc_return;
GimpProcedure *procedure;
procedure = gimp_plug_in_create_procedure (plug_in, proc_run->name);
if (procedure)
{
gimp_plug_in_proc_run_internal (proc_run, procedure,
&proc_return);
g_object_unref (procedure);
}
if (! gp_proc_return_write (plug_in->priv->write_channel,
&proc_return, plug_in))
gimp_quit ();
}
static void
gimp_plug_in_temp_proc_run (GimpPlugIn *plug_in,
GPProcRun *proc_run)
{
GPProcReturn proc_return;
GimpProcedure *procedure;
procedure = gimp_plug_in_get_temp_procedure (plug_in, proc_run->name);
if (procedure)
{
gimp_plug_in_proc_run_internal (proc_run, procedure,
&proc_return);
}
if (! gp_temp_proc_return_write (plug_in->priv->write_channel,
&proc_return, plug_in))
gimp_quit ();
}
static void
gimp_plug_in_proc_run_internal (GPProcRun *proc_run,
GimpProcedure *procedure,
GPProcReturn *proc_return)
{
GimpValueArray *arguments;
GimpValueArray *return_values = NULL;
arguments = _gimp_gp_params_to_value_array (NULL,
NULL, 0,
proc_run->params,
proc_run->nparams,
FALSE, FALSE);
return_values = gimp_procedure_run (procedure, arguments);
gimp_value_array_unref (arguments);
proc_return->name = proc_run->name;
proc_return->nparams = gimp_value_array_length (return_values);
proc_return->params = _gimp_value_array_to_gp_params (return_values, TRUE);
gimp_value_array_unref (return_values);
}
static gboolean
gimp_plug_in_io_error_handler (GIOChannel *channel,
GIOCondition cond,
gpointer data)
{
g_printerr ("%s: fatal error: GIMP crashed\n", gimp_get_progname ());
gimp_quit ();
/* never reached */
return TRUE;
}
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