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/*
* @(#) $Id: gwymodule-tool.c 15598 2013-11-11 12:33:32Z yeti-dn $
* Copyright (C) 2003-2006 David Necas (Yeti), Petr Klapetek.
* E-mail: yeti@gwyddion.net, klapetek@gwyddion.net.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include <string.h>
#include <libgwyddion/gwymacros.h>
#include <libgwyddion/gwyutils.h>
#include <libgwymodule/gwymodule-tool.h>
#include "gwymoduleinternal.h"
/* Auxiliary structure to pass both user callback function and data to
* g_hash_table_foreach() lambda argument in gwy_tool_func_foreach() */
typedef struct {
GFunc function;
gpointer user_data;
} ToolFuncForeachData;
static GHashTable *tool_funcs = NULL;
/**
* gwy_tool_func_register:
* @type: Layer type in GObject type system. That is the return value of
* gwy_tool_foo_get_type().
*
* Registeres a tool function (tool type).
*
* Returns: Normally %TRUE; %FALSE on failure.
**/
gboolean
gwy_tool_func_register(GType type)
{
const gchar *name;
gpointer klass;
g_return_val_if_fail(type, FALSE);
klass = g_type_class_ref(type);
name = g_type_name(type);
gwy_debug("tool type = %s", name);
if (!tool_funcs) {
gwy_debug("Initializing...");
tool_funcs = g_hash_table_new_full(g_str_hash, g_str_equal,
NULL, NULL);
}
if (g_hash_table_lookup(tool_funcs, name)) {
g_warning("Duplicate type %s, keeping only first", name);
g_type_class_unref(klass);
return FALSE;
}
g_hash_table_insert(tool_funcs, (gpointer)name, GUINT_TO_POINTER(type));
if (!_gwy_module_add_registered_function(GWY_MODULE_PREFIX_TOOL, name)) {
g_hash_table_remove(tool_funcs, name);
g_type_class_unref(klass);
return FALSE;
}
return TRUE;
}
static void
gwy_tool_func_user_cb(gpointer key,
G_GNUC_UNUSED gpointer value,
gpointer user_data)
{
ToolFuncForeachData *tffd = (ToolFuncForeachData*)user_data;
tffd->function(key, tffd->user_data);
}
/**
* gwy_tool_func_foreach:
* @function: Function to run for each tool function. It will get function
* name (constant string owned by module system) as its first
* argument, @user_data as the second argument.
* @user_data: Data to pass to @function.
*
* Calls a function for each tool function.
**/
void
gwy_tool_func_foreach(GFunc function,
gpointer user_data)
{
ToolFuncForeachData tffd;
if (!tool_funcs)
return;
tffd.user_data = user_data;
tffd.function = function;
g_hash_table_foreach(tool_funcs, gwy_tool_func_user_cb, &tffd);
}
gboolean
_gwy_tool_func_remove(const gchar *name)
{
GType type;
gwy_debug("%s", name);
type = GPOINTER_TO_UINT(g_hash_table_lookup(tool_funcs, name));
if (!type) {
g_warning("Cannot remove function %s", name);
return FALSE;
}
g_type_class_unref(g_type_class_peek(type));
g_hash_table_remove(tool_funcs, name);
return TRUE;
}
/************************** Documentation ****************************/
/**
* SECTION:gwymodule-tool
* @title: gwymodule-tool
* @short_description: Interactive tool modules
*
* Tool modules implement interactive tools that work directly on data
* windows.
**/
/**
* GwyToolFuncInfo:
* @name: An unique tool function name.
* @stock_id: Icon stock id or button label (FIXME: more to be said).
* @tooltip: Tooltip for this tool.
* @use: The tool use function itself.
*
* Information about one tool use function.
**/
/* vim: set cin et ts=4 sw=4 cino=>1s,e0,n0,f0,{0,}0,^0,\:1s,=0,g1s,h0,t0,+1s,c3,(0,u0 : */
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