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# GIMP - The GNU Image Manipulation
Program
# 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/>.
#
"Perlized" from C source
by Manish Singh <yosh@gimp.org>
sub image_undo_group_start {
$blurb =
'Starts a group undo.';
$help = <<
'HELP';
This
function is used
to start a group undo--necessary
for logically combining
two
or more undo operations
into a
single operation. This
call must be used
in
conjunction with a gimp_image_undo_group_end()
call.
HELP
&std_pdb_misc;
$date =
'1997';
@inargs = (
{ name =>
'image',
type =>
'image',
desc =>
'The ID of the image in which to open an undo group' }
);
%invoke = (
code => <<
'CODE'
{
GimpPlugIn
*plug_in = gimp->plug_in_manager->current_plug_in;
const gchar
*undo_desc = NULL;
if (plug_in)
{
success = gimp_plug_in_cleanup_undo_group_start (plug_in, image);
if (success)
undo_desc = gimp_plug_in_get_undo_desc (plug_in);
}
if (success)
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_MISC, undo_desc);
}
CODE
);
}
sub image_undo_group_end {
$blurb =
'Finish a group undo.';
$help = <<
'HELP';
This
function must be called once
for each gimp_image_undo_group_start()
call
that
is made.
HELP
&std_pdb_misc;
$date =
'1997';
@inargs = (
{ name =>
'image',
type =>
'image',
desc =>
'The ID of the image in which to close an undo group' }
);
%invoke = (
code => <<
'CODE'
{
GimpPlugIn
*plug_in = gimp->plug_in_manager->current_plug_in;
if (plug_in)
success = gimp_plug_in_cleanup_undo_group_end (plug_in, image);
if (success)
gimp_image_undo_group_end (image);
}
CODE
);
}
sub image_undo_is_enabled {
$blurb =
"Check if the image's undo stack is enabled.";
$help = <<
'HELP';
This procedure checks
if the image
's undo stack is currently enabled or
disabled. This
is useful
when several plug-ins
or scripts
call each other
and want
to check if their caller has already used gimp_image_undo_disable()
or gimp_image_undo_freeze().
HELP
&raphael_pdb_misc(
'1999');
@inargs = (
{ name =>
'image',
type =>
'image',
desc =>
'The image' }
);
@outargs = (
{ name =>
'enabled',
type =>
'boolean',
desc =>
'TRUE if undo is enabled for this image' }
);
%invoke = (
code => <<
'CODE'
{
enabled = gimp_image_undo_is_enabled (image);
}
CODE
);
}
sub image_undo_disable {
$blurb =
"Disable the image's undo stack.";
$help = <<
'HELP';
This procedure disables the image
's undo stack, allowing subsequent operations
to ignore their undo steps. This
is generally called
in conjunction with
gimp_image_undo_enable()
to temporarily disable an image undo stack. This
is
advantageous because saving undo steps can be
time and memory intensive.
HELP
&std_pdb_misc;
@inargs = (
{ name =>
'image',
type =>
'image',
desc =>
'The image' }
);
@outargs = (
{ name =>
'disabled',
type =>
'boolean',
desc =>
'TRUE if the image undo has been disabled' }
);
%invoke = (
code => <<
'CODE'
{
#
if 0
GimpPlugIn
*plug_in = gimp->plug_in_manager->current_plug_in;
if (plug_in)
success = gimp_plug_in_cleanup_undo_disable (plug_in, image);
#
endif
if (success)
disabled = gimp_image_undo_disable (image);
}
CODE
);
}
sub image_undo_enable {
$blurb =
"Enable the image's undo stack.";
$help = <<
'HELP';
This procedure enables the image
's undo stack, allowing subsequent operations
to store their undo steps. This
is generally called
in conjunction with
gimp_image_undo_disable()
to temporarily disable an image undo stack.
HELP
&std_pdb_misc;
@inargs = (
{ name =>
'image',
type =>
'image',
desc =>
'The image' }
);
@outargs = (
{ name =>
'enabled',
type =>
'boolean',
desc =>
'TRUE if the image undo has been enabled' }
);
%invoke = (
code => <<
'CODE'
{
#
if 0
GimpPlugIn
*plug_in = gimp->plug_in_manager->current_plug_in;
if (plug_in)
success = gimp_plug_in_cleanup_undo_enable (plug_in, image);
#
endif
if (success)
enabled = gimp_image_undo_enable (image);
}
CODE
);
}
sub image_undo_freeze {
$blurb =
"Freeze the image's undo stack.";
&adam_pdb_misc(
'1999');
$help = <<
'HELP';
This procedure freezes the image
's undo stack, allowing subsequent
operations
to ignore their undo steps. This
is generally called
in
conjunction with gimp_image_undo_thaw()
to temporarily disable an
image undo stack. This
is advantageous because saving undo steps can
be
time and memory intensive. gimp_image_undo_freeze() /
gimp_image_undo_thaw()
and gimp_image_undo_disable() /
gimp_image_undo_enable() differ
in that the former does not
free up
all undo steps
when undo
is thawed, so
is more suited
to interactive
in-situ previews. It
is important
in this
case that the image
is back
to the same state it was frozen
in before thawing,
else 'undo'
behavior
is undefined.
HELP
@inargs = (
{ name =>
'image',
type =>
'image',
desc =>
'The image' }
);
@outargs = (
{ name =>
'frozen',
type =>
'boolean',
desc =>
'TRUE if the image undo has been frozen' }
);
%invoke = (
code => <<
'CODE'
{
#
if 0
GimpPlugIn
*plug_in = gimp->plug_in_manager->current_plug_in;
if (plug_in)
success = gimp_plug_in_cleanup_undo_freeze (plug_in, image);
#
endif
if (success)
frozen = gimp_image_undo_freeze (image);
}
CODE
);
}
sub image_undo_thaw {
$blurb =
"Thaw the image's undo stack.";
&adam_pdb_misc(
'1999');
$help = <<
'HELP';
This procedure thaws the image
's undo stack, allowing subsequent
operations
to store their undo steps. This
is generally called
in
conjunction with gimp_image_undo_freeze()
to temporarily freeze an
image undo stack. gimp_image_undo_thaw() does NOT
free the undo stack
as gimp_image_undo_enable() does, so
is suited
for situations
where
one wishes
to leave the undo stack
in the same state
in which one
found it despite non-destructively playing with the image
in the
meantime. An example would be
in-situ plug-
in previews. Balancing
freezes
and thaws
and ensuring image consistency
is the responsibility
of the caller.
HELP
@inargs = (
{ name =>
'image',
type =>
'image',
desc =>
'The image' }
);
@outargs = (
{ name =>
'thawed',
type =>
'boolean',
desc =>
'TRUE if the image undo has been thawed' }
);
%invoke = (
code => <<
'CODE'
{
#
if 0
GimpPlugIn
*plug_in = gimp->plug_in_manager->current_plug_in;
if (plug_in)
success = gimp_plug_in_cleanup_undo_thaw (plug_in, image);
#
endif
if (success)
thawed = gimp_image_undo_thaw (image);
}
CODE
);
}
@headers = qw(
"core/gimp.h"
"core/gimpimage-undo.h"
"plug-in/gimpplugin.h"
"plug-in/gimpplugin-cleanup.h"
"plug-in/gimppluginmanager.h");
@procs = qw(image_undo_group_start image_undo_group_end
image_undo_is_enabled
image_undo_disable image_undo_enable
image_undo_freeze image_undo_thaw);
%exports = (app => [@procs], lib => [@procs]);
$desc =
'Image Undo';
$doc_title =
'gimpimageundo';
$doc_short_desc =
'Control of image undo/redo.';
$doc_long_desc =
'Control of image undo/redo.';
1;