/* 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/.
*/
#undef GDK_DISABLE_DEPRECATED
#include "config.h"
#include <X11/Xlib.h>
#include <X11/Xos.h>
#include <locale.h>
#include "gdkx.h"
#include "gdkfont.h"
#include "gdkprivate-x11.h"
#include "gdkinternals.h"
#include "gdkdisplay-x11.h"
#include "gdkscreen-x11.h"
#include "gdkalias.h"
typedef struct _GdkFontPrivateX GdkFontPrivateX;
struct _GdkFontPrivateX
{
GdkFontPrivate base;
/* XFontStruct *xfont; */
/* generic pointer point to XFontStruct or XFontSet */
gpointer xfont;
GdkDisplay *display;
GSList *names;
XID xid;
};
static GHashTable *
gdk_font_name_hash_get (GdkDisplay *display)
{
GHashTable *result;
static GQuark font_name_quark = 0;
if (!font_name_quark)
font_name_quark = g_quark_from_static_string ("gdk-font-hash");
result = g_object_get_qdata (G_OBJECT (display), font_name_quark);
if (!result)
{
result = g_hash_table_new (g_str_hash, g_str_equal);
g_object_set_qdata_full (G_OBJECT (display),
font_name_quark, result, (GDestroyNotify) g_hash_table_destroy);
}
return result;
}
static GHashTable *
gdk_fontset_name_hash_get (GdkDisplay *display)
{
GHashTable *result;
static GQuark fontset_name_quark = 0;
if (!fontset_name_quark)
fontset_name_quark = g_quark_from_static_string ("gdk-fontset-hash");
result = g_object_get_qdata (G_OBJECT (display), fontset_name_quark);
if (!result)
{
result = g_hash_table_new (g_str_hash, g_str_equal);
g_object_set_qdata_full (G_OBJECT (display),
fontset_name_quark, result, (GDestroyNotify) g_hash_table_destroy);
}
return result;
}
/**
* gdk_font_get_display:
* @font: the #GdkFont.
*
* Returns the #GdkDisplay for @font.
*
* Returns: the corresponding #GdkDisplay.
*
* Since: 2.2
**/
GdkDisplay*
gdk_font_get_display (GdkFont* font)
{
return ((GdkFontPrivateX *)font)->display;
}
static void
gdk_font_hash_insert (GdkFontType type,
GdkFont *font,
const gchar *font_name)
{
GdkFontPrivateX *private = (GdkFontPrivateX *)font;
GHashTable *hash = (type == GDK_FONT_FONT) ?
gdk_font_name_hash_get (private->display) : gdk_fontset_name_hash_get (private->display);
private->names = g_slist_prepend (private->names, g_strdup (font_name));
g_hash_table_insert (hash, 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) ?
gdk_font_name_hash_get (private->display) : gdk_fontset_name_hash_get (private->display);
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 (GdkDisplay *display,
GdkFontType type,
const gchar *font_name)
{
GdkFont *result;
GHashTable *hash;
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
hash = (type == GDK_FONT_FONT) ? gdk_font_name_hash_get (display) :
gdk_fontset_name_hash_get (display);
if (!hash)
return NULL;
else
{
result = g_hash_table_lookup (hash, font_name);
if (result)
gdk_font_ref (result);
return result;
}
}
/**
* gdk_font_load_for_display:
* @display: a #GdkDisplay
* @font_name: a XLFD describing the font to load.
* @returns: a #GdkFont, or %NULL if the font could not be loaded.
*
* Loads a font for use on @display.
*
* The font may be newly loaded or looked up the font in a cache.
* You should make no assumptions about the initial reference count.
*
* Since: 2.2
*/
GdkFont *
gdk_font_load_for_display (GdkDisplay *display,
const gchar *font_name)
{
GdkFont *font;
GdkFontPrivateX *private;
XFontStruct *xfont;
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
g_return_val_if_fail (font_name != NULL, NULL);
font = gdk_font_hash_lookup (display, GDK_FONT_FONT, font_name);
if (font)
return font;
xfont = XLoadQueryFont (GDK_DISPLAY_XDISPLAY (display), font_name);
if (xfont == NULL)
return NULL;
font = gdk_font_lookup_for_display (display, xfont->fid);
if (font != NULL)
{
private = (GdkFontPrivateX *) font;
if (xfont != private->xfont)
XFreeFont (GDK_DISPLAY_XDISPLAY (display), xfont);
gdk_font_ref (font);
}
else
{
private = g_new (GdkFontPrivateX, 1);
private->display = display;
private->xfont = xfont;
private->base.ref_count = 1;
private->names = NULL;
private->xid = xfont->fid | XID_FONT_BIT;
font = (GdkFont*) private;
font->type = GDK_FONT_FONT;
font->ascent = xfont->ascent;
font->descent = xfont->descent;
_gdk_xid_table_insert (display, &private->xid, font);
}
gdk_font_hash_insert (GDK_FONT_FONT, font, font_name);
return font;
}
/**
* gdk_font_from_description_for_display:
* @display: a #GdkDisplay
* @font_desc: a #PangoFontDescription.
*
* Loads a #GdkFont based on a Pango font description for use on @display.
* 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.
*
* Since: 2.2
*/
GdkFont *
gdk_font_from_description_for_display (GdkDisplay *display,
PangoFontDescription *font_desc)
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
g_return_val_if_fail (font_desc != NULL, NULL);
return gdk_font_load_for_display (display, "fixed");
}
/**
* gdk_fontset_load_for_display:
* @display: a #GdkDisplay
* @fontset_name: a comma-separated list of XLFDs describing
* the component fonts of the fontset to load.
* @returns: a #GdkFont, or %NULL if the fontset could not be loaded.
*
* Loads a fontset for use on @display.
*
* The fontset may be newly loaded or looked up in a cache.
* You should make no assumptions about the initial reference count.
*
* Since: 2.2
*/
GdkFont *
gdk_fontset_load_for_display (GdkDisplay *display,
const gchar *fontset_name)
{
GdkFont *font;
GdkFontPrivateX *private;
XFontSet fontset;
gint missing_charset_count;
gchar **missing_charset_list;
gchar *def_string;
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
font = gdk_font_hash_lookup (display, GDK_FONT_FONTSET, fontset_name);
if (font)
return font;
private = g_new (GdkFontPrivateX, 1);
font = (GdkFont*) private;
private->display = display;
fontset = XCreateFontSet (GDK_DISPLAY_XDISPLAY (display), fontset_name,
&missing_charset_list, &missing_charset_count,
&def_string);
if (missing_charset_count)
{
gint i;
g_printerr ("The font \"%s\" does not support all the required character sets for the current locale \"%s\"\n",
fontset_name, setlocale (LC_ALL, NULL));
for (i=0;i<missing_charset_count;i++)
g_printerr (" (Missing character set \"%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;
}
}
/**
* gdk_fontset_load:
* @fontset_name: a comma-separated list of XLFDs describing
* the component fonts of the fontset to load.
*
* Loads a fontset.
*
* The fontset may be newly loaded or looked up in a cache.
* You should make no assumptions about the initial reference count.
*
* Return value: a #GdkFont, or %NULL if the fontset could not be loaded.
**/
GdkFont*
gdk_fontset_load (const gchar *fontset_name)
{
return gdk_fontset_load_for_display (gdk_display_get_default (), fontset_name);
}
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 (private->display, private->xid);
XFreeFont (GDK_DISPLAY_XDISPLAY (private->display),
(XFontStruct *) private->xfont);
break;
case GDK_FONT_FONTSET:
XFreeFontSet (GDK_DISPLAY_XDISPLAY (private->display),
(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;
}
/**
* gdk_font_id:
* @font: a #GdkFont.
*
* Returns the X Font ID for the given font.
*
* Return value: the numeric X Font ID
**/
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;
}
}
/**
* gdk_font_equal:
* @fonta: a #GdkFont.
* @fontb: another #GdkFont.
*
* Compares two fonts for equality. Single fonts compare equal
* if they have the same X font ID. This operation does
* not currently work correctly for fontsets.
*
* Return value: %TRUE if the fonts are equal.
**/
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 FALSE;
}
/**
* gdk_text_width:
* @font: a #GdkFont
* @text: the text to measure.
* @text_length: the length of the text in bytes.
*
* Determines the width of a given string.
*
* Return value: the width of the string in pixels.
**/
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;
}
/**
* gdk_text_width_wc:
* @font: a #GdkFont
* @text: the text to measure.
* @text_length: the length of the text in characters.
*
* Determines the width of a given wide-character string.
*
* Return value: the width of the string in pixels.
**/
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;
}
/**
* gdk_text_extents:
* @font: a #GdkFont
* @text: the text to measure
* @text_length: the length of the text in bytes. (If the
* font is a 16-bit font, this is twice the length
* of the text in characters.)
* @lbearing: the left bearing of the string.
* @rbearing: the right bearing of the string.
* @width: the width of the string.
* @ascent: the ascent of the string.
* @descent: the descent of the string.
*
* Gets the metrics of a string.
**/
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;
}
}
/**
* gdk_text_extents_wc:
* @font: a #GdkFont
* @text: the text to measure.
* @text_length: the length of the text in character.
* @lbearing: the left bearing of the string.
* @rbearing: the right bearing of the string.
* @width: the width of the string.
* @ascent: the ascent of the string.
* @descent: the descent of the string.
*
* Gets the metrics of a string of wide characters.
**/
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;
}
}
/**
* gdk_x11_font_get_xdisplay:
* @font: a #GdkFont.
*
* Returns the display of a #GdkFont.
*
* Return value: an Xlib <type>Display*</type>.
**/
Display *
gdk_x11_font_get_xdisplay (GdkFont *font)
{
g_return_val_if_fail (font != NULL, NULL);
return GDK_DISPLAY_XDISPLAY (((GdkFontPrivateX *)font)->display);
}
/**
* gdk_x11_font_get_xfont:
* @font: a #GdkFont.
*
* Returns the X font belonging to a #GdkFont.
*
* Return value: an Xlib <type>XFontStruct*</type> or an <type>XFontSet</type>.
**/
gpointer
gdk_x11_font_get_xfont (GdkFont *font)
{
g_return_val_if_fail (font != NULL, NULL);
return ((GdkFontPrivateX *)font)->xfont;
}
/**
* gdk_x11_font_get_name:
* @font: a #GdkFont.
*
* Return the X Logical Font Description (for font->type == GDK_FONT_FONT)
* or comma separated list of XLFDs (for font->type == GDK_FONT_FONTSET)
* that was used to load the font. If the same font was loaded
* via multiple names, which name is returned is undefined.
*
* Return value: the name of the font. This string is owned
* by GDK and must not be modified or freed.
**/
const char *
gdk_x11_font_get_name (GdkFont *font)
{
GdkFontPrivateX *private = (GdkFontPrivateX *)font;
g_return_val_if_fail (font != NULL, NULL);
g_assert (private->names);
return private->names->data;
}
#define __GDK_FONT_X11_C__
#include "gdkaliasdef.c"