mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-11-05 16:20:10 +00:00
255 lines
7.0 KiB
C
255 lines
7.0 KiB
C
/* GDK - The GIMP Drawing Kit
|
||
* Copyright (C) 2000 Red Hat, Inc.
|
||
* 2005 Imendio AB
|
||
*
|
||
* 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 2 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 <http://www.gnu.org/licenses/>.
|
||
*/
|
||
|
||
#include "config.h"
|
||
|
||
#include "gdkproperty.h"
|
||
|
||
#include "gdkprivate.h"
|
||
|
||
/**
|
||
* SECTION:properties
|
||
* @Short_description: Functions to manipulate properties on windows
|
||
* @Title: Properties and Atoms
|
||
*
|
||
* Each window under X can have any number of associated
|
||
* “properties” attached to it.
|
||
* Properties are arbitrary chunks of data identified by
|
||
* “atom”s. (An “atom”
|
||
* is a numeric index into a string table on the X server. They are used
|
||
* to transfer strings efficiently between clients without
|
||
* having to transfer the entire string.) A property
|
||
* has an associated type, which is also identified
|
||
* using an atom.
|
||
*
|
||
* A property has an associated “format”,
|
||
* an integer describing how many bits are in each unit
|
||
* of data inside the property. It must be 8, 16, or 32.
|
||
* When data is transferred between the server and client,
|
||
* if they are of different endianesses it will be byteswapped
|
||
* as necessary according to the format of the property.
|
||
* Note that on the client side, properties of format 32
|
||
* will be stored with one unit per long,
|
||
* even if a long integer has more than 32 bits on the platform.
|
||
* (This decision was apparently made for Xlib to maintain
|
||
* compatibility with programs that assumed longs were 32
|
||
* bits, at the expense of programs that knew better.)
|
||
*
|
||
* The functions in this section are used to add, remove
|
||
* and change properties on windows, to convert atoms
|
||
* to and from strings and to manipulate some types of
|
||
* data commonly stored in X window properties.
|
||
*/
|
||
|
||
static GHashTable *names_to_atoms;
|
||
static GPtrArray *atoms_to_names;
|
||
|
||
static const gchar xatoms_string[] =
|
||
/* These are all the standard predefined X atoms */
|
||
"NONE\0"
|
||
"PRIMARY\0"
|
||
"SECONDARY\0"
|
||
"ARC\0"
|
||
"ATOM\0"
|
||
"BITMAP\0"
|
||
"CARDINAL\0"
|
||
"COLORMAP\0"
|
||
"CURSOR\0"
|
||
"CUT_BUFFER0\0"
|
||
"CUT_BUFFER1\0"
|
||
"CUT_BUFFER2\0"
|
||
"CUT_BUFFER3\0"
|
||
"CUT_BUFFER4\0"
|
||
"CUT_BUFFER5\0"
|
||
"CUT_BUFFER6\0"
|
||
"CUT_BUFFER7\0"
|
||
"DRAWABLE\0"
|
||
"FONT\0"
|
||
"INTEGER\0"
|
||
"PIXMAP\0"
|
||
"POINT\0"
|
||
"RECTANGLE\0"
|
||
"RESOURCE_MANAGER\0"
|
||
"RGB_COLOR_MAP\0"
|
||
"RGB_BEST_MAP\0"
|
||
"RGB_BLUE_MAP\0"
|
||
"RGB_DEFAULT_MAP\0"
|
||
"RGB_GRAY_MAP\0"
|
||
"RGB_GREEN_MAP\0"
|
||
"RGB_RED_MAP\0"
|
||
"STRING\0"
|
||
"VISUALID\0"
|
||
"WINDOW\0"
|
||
"WM_COMMAND\0"
|
||
"WM_HINTS\0"
|
||
"WM_CLIENT_MACHINE\0"
|
||
"WM_ICON_NAME\0"
|
||
"WM_ICON_SIZE\0"
|
||
"WM_NAME\0"
|
||
"WM_NORMAL_HINTS\0"
|
||
"WM_SIZE_HINTS\0"
|
||
"WM_ZOOM_HINTS\0"
|
||
"MIN_SPACE\0"
|
||
"NORM_SPACE\0"
|
||
"MAX_SPACE\0"
|
||
"END_SPACE\0"
|
||
"SUPERSCRIPT_X\0"
|
||
"SUPERSCRIPT_Y\0"
|
||
"SUBSCRIPT_X\0"
|
||
"SUBSCRIPT_Y\0"
|
||
"UNDERLINE_POSITION\0"
|
||
"UNDERLINE_THICKNESS\0"
|
||
"STRIKEOUT_ASCENT\0"
|
||
"STRIKEOUT_DESCENT\0"
|
||
"ITALIC_ANGLE\0"
|
||
"X_HEIGHT\0"
|
||
"QUAD_WIDTH\0"
|
||
"WEIGHT\0"
|
||
"POINT_SIZE\0"
|
||
"RESOLUTION\0"
|
||
"COPYRIGHT\0"
|
||
"NOTICE\0"
|
||
"FONT_NAME\0"
|
||
"FAMILY_NAME\0"
|
||
"FULL_NAME\0"
|
||
"CAP_HEIGHT\0"
|
||
"WM_CLASS\0"
|
||
"WM_TRANSIENT_FOR\0"
|
||
"CLIPBOARD\0" /* = 69 */;
|
||
|
||
static const gint xatoms_offset[] = {
|
||
0, 5, 13, 23, 27, 32, 39, 48, 57, 64, 76, 88,
|
||
100, 112, 124, 136, 148, 160, 169, 174, 182, 189, 195, 205,
|
||
222, 236, 249, 262, 278, 291, 305, 317, 324, 333, 340, 351,
|
||
360, 378, 391, 404, 412, 428, 442, 456, 466, 477, 487, 497,
|
||
511, 525, 537, 549, 568, 588, 605, 623, 636, 645, 656, 663,
|
||
674, 685, 695, 702, 712, 724, 734, 745, 754, 771
|
||
};
|
||
|
||
static void
|
||
ensure_atom_tables (void)
|
||
{
|
||
int i;
|
||
|
||
if (names_to_atoms)
|
||
return;
|
||
|
||
names_to_atoms = g_hash_table_new (g_str_hash, g_str_equal);
|
||
atoms_to_names = g_ptr_array_sized_new (G_N_ELEMENTS (xatoms_offset));
|
||
|
||
for (i = 0; i < G_N_ELEMENTS (xatoms_offset); i++)
|
||
{
|
||
g_hash_table_insert(names_to_atoms, (gchar *)xatoms_string + xatoms_offset[i], GINT_TO_POINTER (i));
|
||
g_ptr_array_add(atoms_to_names, (gchar *)xatoms_string + xatoms_offset[i]);
|
||
}
|
||
}
|
||
|
||
static GdkAtom
|
||
intern_atom_internal (const gchar *atom_name, gboolean allocate)
|
||
{
|
||
gpointer result;
|
||
gchar *name;
|
||
|
||
ensure_atom_tables ();
|
||
|
||
if (g_hash_table_lookup_extended (names_to_atoms, atom_name, NULL, &result))
|
||
return result;
|
||
|
||
result = GINT_TO_POINTER (atoms_to_names->len);
|
||
name = allocate ? g_strdup (atom_name) : (gchar *)atom_name;
|
||
g_hash_table_insert(names_to_atoms, name, result);
|
||
g_ptr_array_add(atoms_to_names, name);
|
||
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* gdk_atom_intern:
|
||
* @atom_name: a string.
|
||
* @only_if_exists: if %TRUE, GDK is allowed to not create a new atom, but
|
||
* just return %GDK_NONE if the requested atom doesn’t already
|
||
* exists. Currently, the flag is ignored, since checking the
|
||
* existance of an atom is as expensive as creating it.
|
||
*
|
||
* Finds or creates an atom corresponding to a given string.
|
||
*
|
||
* Returns: (transfer none): the atom corresponding to @atom_name.
|
||
*/
|
||
GdkAtom
|
||
gdk_atom_intern (const gchar *atom_name,
|
||
gboolean only_if_exists)
|
||
{
|
||
g_return_val_if_fail (atom_name != NULL, GDK_NONE);
|
||
|
||
return intern_atom_internal (atom_name, TRUE);
|
||
}
|
||
|
||
/**
|
||
* gdk_atom_intern_static_string:
|
||
* @atom_name: a static string
|
||
*
|
||
* Finds or creates an atom corresponding to a given string.
|
||
*
|
||
* Note that this function is identical to gdk_atom_intern() except
|
||
* that if a new #GdkAtom is created the string itself is used rather
|
||
* than a copy. This saves memory, but can only be used if the string
|
||
* will always exist. It can be used with statically
|
||
* allocated strings in the main program, but not with statically
|
||
* allocated memory in dynamically loaded modules, if you expect to
|
||
* ever unload the module again (e.g. do not use this function in
|
||
* GTK+ theme engines).
|
||
*
|
||
* Returns: (transfer none): the atom corresponding to @atom_name
|
||
*
|
||
* Since: 2.10
|
||
*/
|
||
GdkAtom
|
||
gdk_atom_intern_static_string (const gchar *atom_name)
|
||
{
|
||
g_return_val_if_fail (atom_name != NULL, GDK_NONE);
|
||
|
||
return intern_atom_internal (atom_name, FALSE);
|
||
}
|
||
|
||
/**
|
||
* gdk_atom_name:
|
||
* @atom: a #GdkAtom.
|
||
*
|
||
* Determines the string corresponding to an atom.
|
||
*
|
||
* Returns: a newly-allocated string containing the string
|
||
* corresponding to @atom. When you are done with the
|
||
* return value, you should free it using g_free().
|
||
*/
|
||
gchar *
|
||
gdk_atom_name (GdkAtom atom)
|
||
{
|
||
return g_strdup (_gdk_atom_name_const (atom));
|
||
}
|
||
|
||
const gchar *
|
||
_gdk_atom_name_const (GdkAtom atom)
|
||
{
|
||
ensure_atom_tables ();
|
||
|
||
if (GPOINTER_TO_INT (atom) >= atoms_to_names->len)
|
||
return NULL;
|
||
|
||
return g_ptr_array_index (atoms_to_names, GPOINTER_TO_INT (atom));
|
||
}
|