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6144752d201473e02d4001f95e9d500a2d6b601e
gtk3/gdk/x11/gdkfont-x11.c
Tim Janik afee2c67c5 applied patch from Andreas Persenius <ndap@swipnet.se> that updates the 
Wed Jul 26 12:59:31 2000  Tim Janik  <timj@gtk.org>

        * *.[hc]: applied patch from Andreas Persenius <ndap@swipnet.se> that
        updates the license headers to the GNU Lesser General Public License,
        as well as updating the copyright year to 2000.
2000-07-26 11:33:08 +00:00

651 lines
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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include <X11/Xlib.h>
#include <X11/Xos.h>
#include <pango/pangox.h>
#include "gdkfont.h"
#include "gdkprivate-x11.h"
static GHashTable *font_name_hash = NULL;
static GHashTable *fontset_name_hash = NULL;
static void
gdk_font_hash_insert (GdkFontType type, GdkFont *font, const gchar *font_name)
{
GdkFontPrivateX *private = (GdkFontPrivateX *)font;
GHashTable **hashp = (type == GDK_FONT_FONT) ?
&font_name_hash : &fontset_name_hash;
if (!*hashp)
*hashp = g_hash_table_new (g_str_hash, g_str_equal);
private->names = g_slist_prepend (private->names, g_strdup (font_name));
g_hash_table_insert (*hashp, private->names->data, font);
}
static void
gdk_font_hash_remove (GdkFontType type, GdkFont *font)
{
GdkFontPrivateX *private = (GdkFontPrivateX *)font;
GSList *tmp_list;
GHashTable *hash = (type == GDK_FONT_FONT) ?
font_name_hash : fontset_name_hash;
tmp_list = private->names;
while (tmp_list)
{
g_hash_table_remove (hash, tmp_list->data);
g_free (tmp_list->data);
tmp_list = tmp_list->next;
}
g_slist_free (private->names);
private->names = NULL;
}
static GdkFont *
gdk_font_hash_lookup (GdkFontType type, const gchar *font_name)
{
GdkFont *result;
GHashTable *hash = (type == GDK_FONT_FONT) ?
font_name_hash : fontset_name_hash;
if (!hash)
return NULL;
else
{
result = g_hash_table_lookup (hash, font_name);
if (result)
gdk_font_ref (result);
return result;
}
}
GdkFont*
gdk_font_load (const gchar *font_name)
{
GdkFont *font;
GdkFontPrivateX *private;
XFontStruct *xfont;
g_return_val_if_fail (font_name != NULL, NULL);
font = gdk_font_hash_lookup (GDK_FONT_FONT, font_name);
if (font)
return font;
xfont = XLoadQueryFont (gdk_display, font_name);
if (xfont == NULL)
return NULL;
font = gdk_font_lookup (xfont->fid);
if (font != NULL)
{
private = (GdkFontPrivateX *) font;
if (xfont != private->xfont)
XFreeFont (gdk_display, xfont);
gdk_font_ref (font);
}
else
{
private = g_new (GdkFontPrivateX, 1);
private->xdisplay = gdk_display;
private->xfont = xfont;
private->base.ref_count = 1;
private->names = NULL;
font = (GdkFont*) private;
font->type = GDK_FONT_FONT;
font->ascent = xfont->ascent;
font->descent = xfont->descent;
gdk_xid_table_insert (&xfont->fid, font);
}
gdk_font_hash_insert (GDK_FONT_FONT, font, font_name);
return font;
}
static char *
gdk_font_charset_for_locale ()
{
static char *charset_map[][2] = {
{ "ANSI_X3.4-1968", "iso8859-1" },
{ "US-ASCII", "iso8859-1" },
{ "ISO-8859-1", "iso8859-1" },
{ "ISO-8859-2", "iso8859-2" },
{ "ISO-8859-3", "iso8859-3" },
{ "ISO-8859-4", "iso8859-4" },
{ "ISO-8859-5", "iso8859-5" },
{ "ISO-8859-6", "iso8859-6" },
{ "ISO-8859-7", "iso8859-7" },
{ "ISO-8859-8", "iso8859-8" },
{ "ISO-8859-9", "iso8859-9" },
{ "UTF-8", "iso8859-1" }
};
char *codeset;
char *result = NULL;
int i;
g_get_charset (&codeset);
for (i=0; i < G_N_ELEMENTS (charset_map); i++)
if (strcmp (charset_map[i][0], codeset) == 0)
{
result = charset_map[i][1];
break;
}
if (result)
return g_strdup (result);
else
return g_strdup ("iso8859-1");
};
/**
* gdk_font_from_description:
* @font_desc: a #PangoFontDescription.
*
* Load a #GdkFont based on a Pango font description. This font will
* only be an approximation of the Pango font, and
* internationalization will not be handled correctly. This function
* should only be used for legacy code that cannot be easily converted
* to use Pango. Using Pango directly will produce better results.
*
* Return value: the newly loaded font, or %NULL if the font
* cannot be loaded.
**/
GdkFont*
gdk_font_from_description (PangoFontDescription *font_desc)
{
PangoFontMap *font_map;
PangoFont *font;
GdkFont *result = NULL;
g_return_val_if_fail (font_desc != NULL, NULL);
font_map = pango_x_font_map_for_display (GDK_DISPLAY ());
font = pango_font_map_load_font (font_map, font_desc);
if (font)
{
gchar *charset = gdk_font_charset_for_locale ();
gint n_subfonts;
PangoXSubfont *subfont_ids;
gint *subfont_charsets;
n_subfonts = pango_x_list_subfonts (font, &charset, 1,
&subfont_ids, &subfont_charsets);
if (n_subfonts > 0)
{
gchar *xlfd = pango_x_font_subfont_xlfd (font, subfont_ids[0]);
result = gdk_font_load (xlfd);
g_free (xlfd);
}
g_free (subfont_ids);
g_free (subfont_charsets);
g_free (charset);
g_object_unref (G_OBJECT (font));
}
return result;
}
GdkFont*
gdk_fontset_load (const gchar *fontset_name)
{
GdkFont *font;
GdkFontPrivateX *private;
XFontSet fontset;
gint missing_charset_count;
gchar **missing_charset_list;
gchar *def_string;
font = gdk_font_hash_lookup (GDK_FONT_FONTSET, fontset_name);
if (font)
return font;
private = g_new (GdkFontPrivateX, 1);
font = (GdkFont*) private;
private->xdisplay = gdk_display;
fontset = XCreateFontSet (gdk_display, fontset_name,
&missing_charset_list, &missing_charset_count,
&def_string);
if (missing_charset_count)
{
gint i;
g_warning ("Missing charsets in FontSet creation\n");
for (i=0;i<missing_charset_count;i++)
g_warning (" %s\n", missing_charset_list[i]);
XFreeStringList (missing_charset_list);
}
private->base.ref_count = 1;
if (!fontset)
{
g_free (font);
return NULL;
}
else
{
gint num_fonts;
gint i;
XFontStruct **font_structs;
gchar **font_names;
private->xfont = fontset;
font->type = GDK_FONT_FONTSET;
num_fonts = XFontsOfFontSet (fontset, &font_structs, &font_names);
font->ascent = font->descent = 0;
for (i = 0; i < num_fonts; i++)
{
font->ascent = MAX (font->ascent, font_structs[i]->ascent);
font->descent = MAX (font->descent, font_structs[i]->descent);
}
private->names = NULL;
gdk_font_hash_insert (GDK_FONT_FONTSET, font, fontset_name);
return font;
}
}
void
_gdk_font_destroy (GdkFont *font)
{
GdkFontPrivateX *private = (GdkFontPrivateX *)font;
gdk_font_hash_remove (font->type, font);
switch (font->type)
{
case GDK_FONT_FONT:
gdk_xid_table_remove (((XFontStruct *) private->xfont)->fid);
XFreeFont (private->xdisplay, (XFontStruct *) private->xfont);
break;
case GDK_FONT_FONTSET:
XFreeFontSet (private->xdisplay, (XFontSet) private->xfont);
break;
default:
g_error ("unknown font type.");
break;
}
g_free (font);
}
gint
_gdk_font_strlen (GdkFont *font,
const gchar *str)
{
GdkFontPrivateX *font_private;
gint length = 0;
g_return_val_if_fail (font != NULL, -1);
g_return_val_if_fail (str != NULL, -1);
font_private = (GdkFontPrivateX*) font;
if (font->type == GDK_FONT_FONT)
{
XFontStruct *xfont = (XFontStruct *) font_private->xfont;
if ((xfont->min_byte1 == 0) && (xfont->max_byte1 == 0))
{
length = strlen (str);
}
else
{
guint16 *string_2b = (guint16 *)str;
while (*(string_2b++))
length++;
}
}
else if (font->type == GDK_FONT_FONTSET)
{
length = strlen (str);
}
else
g_error("undefined font type\n");
return length;
}
gint
gdk_font_id (const GdkFont *font)
{
const GdkFontPrivateX *font_private;
g_return_val_if_fail (font != NULL, 0);
font_private = (const GdkFontPrivateX*) font;
if (font->type == GDK_FONT_FONT)
{
return ((XFontStruct *) font_private->xfont)->fid;
}
else
{
return 0;
}
}
gboolean
gdk_font_equal (const GdkFont *fonta,
const GdkFont *fontb)
{
const GdkFontPrivateX *privatea;
const GdkFontPrivateX *privateb;
g_return_val_if_fail (fonta != NULL, FALSE);
g_return_val_if_fail (fontb != NULL, FALSE);
privatea = (const GdkFontPrivateX*) fonta;
privateb = (const GdkFontPrivateX*) fontb;
if (fonta->type == GDK_FONT_FONT && fontb->type == GDK_FONT_FONT)
{
return (((XFontStruct *) privatea->xfont)->fid ==
((XFontStruct *) privateb->xfont)->fid);
}
else if (fonta->type == GDK_FONT_FONTSET && fontb->type == GDK_FONT_FONTSET)
{
gchar *namea, *nameb;
namea = XBaseFontNameListOfFontSet((XFontSet) privatea->xfont);
nameb = XBaseFontNameListOfFontSet((XFontSet) privateb->xfont);
return (strcmp(namea, nameb) == 0);
}
else
/* fontset != font */
return 0;
}
gint
gdk_text_width (GdkFont *font,
const gchar *text,
gint text_length)
{
GdkFontPrivateX *private;
gint width;
XFontStruct *xfont;
XFontSet fontset;
g_return_val_if_fail (font != NULL, -1);
g_return_val_if_fail (text != NULL, -1);
private = (GdkFontPrivateX*) font;
switch (font->type)
{
case GDK_FONT_FONT:
xfont = (XFontStruct *) private->xfont;
if ((xfont->min_byte1 == 0) && (xfont->max_byte1 == 0))
{
width = XTextWidth (xfont, text, text_length);
}
else
{
width = XTextWidth16 (xfont, (XChar2b *) text, text_length / 2);
}
break;
case GDK_FONT_FONTSET:
fontset = (XFontSet) private->xfont;
width = XmbTextEscapement (fontset, text, text_length);
break;
default:
width = 0;
}
return width;
}
gint
gdk_text_width_wc (GdkFont *font,
const GdkWChar *text,
gint text_length)
{
GdkFontPrivateX *private;
gint width;
XFontStruct *xfont;
XFontSet fontset;
g_return_val_if_fail (font != NULL, -1);
g_return_val_if_fail (text != NULL, -1);
private = (GdkFontPrivateX*) font;
switch (font->type)
{
case GDK_FONT_FONT:
xfont = (XFontStruct *) private->xfont;
if ((xfont->min_byte1 == 0) && (xfont->max_byte1 == 0))
{
gchar *text_8bit;
gint i;
text_8bit = g_new (gchar, text_length);
for (i=0; i<text_length; i++) text_8bit[i] = text[i];
width = XTextWidth (xfont, text_8bit, text_length);
g_free (text_8bit);
}
else
{
width = 0;
}
break;
case GDK_FONT_FONTSET:
if (sizeof(GdkWChar) == sizeof(wchar_t))
{
fontset = (XFontSet) private->xfont;
width = XwcTextEscapement (fontset, (wchar_t *)text, text_length);
}
else
{
wchar_t *text_wchar;
gint i;
fontset = (XFontSet) private->xfont;
text_wchar = g_new(wchar_t, text_length);
for (i=0; i<text_length; i++) text_wchar[i] = text[i];
width = XwcTextEscapement (fontset, text_wchar, text_length);
g_free (text_wchar);
}
break;
default:
width = 0;
}
return width;
}
void
gdk_text_extents (GdkFont *font,
const gchar *text,
gint text_length,
gint *lbearing,
gint *rbearing,
gint *width,
gint *ascent,
gint *descent)
{
GdkFontPrivateX *private;
XCharStruct overall;
XFontStruct *xfont;
XFontSet fontset;
XRectangle ink, logical;
int direction;
int font_ascent;
int font_descent;
g_return_if_fail (font != NULL);
g_return_if_fail (text != NULL);
private = (GdkFontPrivateX*) font;
switch (font->type)
{
case GDK_FONT_FONT:
xfont = (XFontStruct *) private->xfont;
if ((xfont->min_byte1 == 0) && (xfont->max_byte1 == 0))
{
XTextExtents (xfont, text, text_length,
&direction, &font_ascent, &font_descent,
&overall);
}
else
{
XTextExtents16 (xfont, (XChar2b *) text, text_length / 2,
&direction, &font_ascent, &font_descent,
&overall);
}
if (lbearing)
*lbearing = overall.lbearing;
if (rbearing)
*rbearing = overall.rbearing;
if (width)
*width = overall.width;
if (ascent)
*ascent = overall.ascent;
if (descent)
*descent = overall.descent;
break;
case GDK_FONT_FONTSET:
fontset = (XFontSet) private->xfont;
XmbTextExtents (fontset, text, text_length, &ink, &logical);
if (lbearing)
*lbearing = ink.x;
if (rbearing)
*rbearing = ink.x + ink.width;
if (width)
*width = logical.width;
if (ascent)
*ascent = -ink.y;
if (descent)
*descent = ink.y + ink.height;
break;
}
}
void
gdk_text_extents_wc (GdkFont *font,
const GdkWChar *text,
gint text_length,
gint *lbearing,
gint *rbearing,
gint *width,
gint *ascent,
gint *descent)
{
GdkFontPrivateX *private;
XCharStruct overall;
XFontStruct *xfont;
XFontSet fontset;
XRectangle ink, logical;
int direction;
int font_ascent;
int font_descent;
g_return_if_fail (font != NULL);
g_return_if_fail (text != NULL);
private = (GdkFontPrivateX*) font;
switch (font->type)
{
case GDK_FONT_FONT:
{
gchar *text_8bit;
gint i;
xfont = (XFontStruct *) private->xfont;
g_return_if_fail ((xfont->min_byte1 == 0) && (xfont->max_byte1 == 0));
text_8bit = g_new (gchar, text_length);
for (i=0; i<text_length; i++)
text_8bit[i] = text[i];
XTextExtents (xfont, text_8bit, text_length,
&direction, &font_ascent, &font_descent,
&overall);
g_free (text_8bit);
if (lbearing)
*lbearing = overall.lbearing;
if (rbearing)
*rbearing = overall.rbearing;
if (width)
*width = overall.width;
if (ascent)
*ascent = overall.ascent;
if (descent)
*descent = overall.descent;
break;
}
case GDK_FONT_FONTSET:
fontset = (XFontSet) private->xfont;
if (sizeof(GdkWChar) == sizeof(wchar_t))
XwcTextExtents (fontset, (wchar_t *)text, text_length, &ink, &logical);
else
{
wchar_t *text_wchar;
gint i;
text_wchar = g_new (wchar_t, text_length);
for (i = 0; i < text_length; i++)
text_wchar[i] = text[i];
XwcTextExtents (fontset, text_wchar, text_length, &ink, &logical);
g_free (text_wchar);
}
if (lbearing)
*lbearing = ink.x;
if (rbearing)
*rbearing = ink.x + ink.width;
if (width)
*width = logical.width;
if (ascent)
*ascent = -ink.y;
if (descent)
*descent = ink.y + ink.height;
break;
}
}
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