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gtk/gdk/gdkfont.c
Jeff Garzik 553fa4309e removed unused var 64-bit cast point to const data Made const-correct. 
* gdk/gdkfont.c: removed unused var
        * gdk/gdkim.c: 64-bit cast
        * gtk/gtkaccelgroup.c: point to const data
        * gtk/gtkdnd.[ch]: (gtk_drag_dest_set, gtk_drag_source_set):
          Made const-correct.
        * gtk/gtkfontsel.c: kill uninitialized var warning
        * gtk/gtkselection.[ch]: (gtk_target_list_new,
          gtk_target_list_add_table, gtk_selection_add_targets):
          Made const-correct.
        * gtk/testgtk.c: 64-bit cast
1998-12-24 17:47:02 +00:00

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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 Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library 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.
*/
#include <X11/Xlib.h>
#include <X11/Xos.h>
#include "gdk.h"
#include "gdkprivate.h"
GdkFont*
gdk_font_load (const gchar *font_name)
{
GdkFont *font;
GdkFontPrivate *private;
private = g_new (GdkFontPrivate, 1);
font = (GdkFont*) private;
private->xdisplay = gdk_display;
private->xfont = XLoadQueryFont (private->xdisplay, font_name);
private->ref_count = 1;
if (!private->xfont)
{
g_free (font);
return NULL;
}
else
{
font->type = GDK_FONT_FONT;
font->ascent = ((XFontStruct *) private->xfont)->ascent;
font->descent = ((XFontStruct *) private->xfont)->descent;
}
gdk_xid_table_insert (&((XFontStruct *) private->xfont)->fid, font);
return font;
}
GdkFont*
gdk_fontset_load (gchar *fontset_name)
{
GdkFont *font;
GdkFontPrivate *private;
XFontSet fontset;
gint missing_charset_count;
gchar **missing_charset_list;
gchar *def_string;
private = g_new (GdkFontPrivate, 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_message ("Missing charsets in FontSet creation\n");
for (i=0;i<missing_charset_count;i++)
g_message (" %s\n", missing_charset_list[i]);
XFreeStringList (missing_charset_list);
}
private->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);
}
}
return font;
}
GdkFont*
gdk_font_ref (GdkFont *font)
{
GdkFontPrivate *private;
g_return_val_if_fail (font != NULL, NULL);
private = (GdkFontPrivate*) font;
private->ref_count += 1;
return font;
}
void
gdk_font_unref (GdkFont *font)
{
GdkFontPrivate *private;
g_return_if_fail (font != NULL);
private = (GdkFontPrivate*) font;
private->ref_count -= 1;
if (private->ref_count == 0)
{
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_id (const GdkFont *font)
{
const GdkFontPrivate *font_private;
g_return_val_if_fail (font != NULL, 0);
font_private = (const GdkFontPrivate*) font;
if (font->type == GDK_FONT_FONT)
{
return ((XFontStruct *) font_private->xfont)->fid;
}
else
{
return 0;
}
}
gint
gdk_font_equal (const GdkFont *fonta,
const GdkFont *fontb)
{
const GdkFontPrivate *privatea;
const GdkFontPrivate *privateb;
g_return_val_if_fail (fonta != NULL, FALSE);
g_return_val_if_fail (fontb != NULL, FALSE);
privatea = (const GdkFontPrivate*) fonta;
privateb = (const GdkFontPrivate*) 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)
{
/* how to compare two fontsets ?? by basename or XFontSet ?? */
return (((XFontSet) privatea->xfont) == ((XFontSet) privateb->xfont));
}
else
/* fontset != font */
return 0;
}
gint
gdk_string_width (GdkFont *font,
const gchar *string)
{
GdkFontPrivate *font_private;
gint width;
XFontStruct *xfont;
XFontSet fontset;
g_return_val_if_fail (font != NULL, -1);
g_return_val_if_fail (string != NULL, -1);
font_private = (GdkFontPrivate*) font;
switch (font->type)
{
case GDK_FONT_FONT:
xfont = (XFontStruct *) font_private->xfont;
if ((xfont->min_byte1 == 0) && (xfont->max_byte1 == 0))
{
width = XTextWidth (xfont, string, strlen (string));
}
else
{
width = XTextWidth16 (xfont, (XChar2b *) string, strlen (string) / 2);
}
break;
case GDK_FONT_FONTSET:
fontset = (XFontSet) font_private->xfont;
width = XmbTextEscapement (fontset, string, strlen(string));
break;
default:
width = 0;
}
return width;
}
gint
gdk_text_width (GdkFont *font,
const gchar *text,
gint text_length)
{
GdkFontPrivate *private;
gint width;
XFontStruct *xfont;
XFontSet fontset;
g_return_val_if_fail (font != NULL, -1);
g_return_val_if_fail (text != NULL, -1);
private = (GdkFontPrivate*) 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)
{
GdkFontPrivate *private;
gint width;
XFontStruct *xfont;
XFontSet fontset;
g_return_val_if_fail (font != NULL, -1);
g_return_val_if_fail (text != NULL, -1);
private = (GdkFontPrivate*) 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;
}
/* Problem: What if a character is a 16 bits character ?? */
gint
gdk_char_width (GdkFont *font,
gchar character)
{
GdkFontPrivate *private;
XCharStruct *chars;
gint width;
guint ch = character & 0xff; /* get rid of sign-extension */
XFontStruct *xfont;
XFontSet fontset;
g_return_val_if_fail (font != NULL, -1);
private = (GdkFontPrivate*) font;
switch (font->type)
{
case GDK_FONT_FONT:
/* only 8 bits characters are considered here */
xfont = (XFontStruct *) private->xfont;
if ((xfont->min_byte1 == 0) &&
(xfont->max_byte1 == 0) &&
(ch >= xfont->min_char_or_byte2) &&
(ch <= xfont->max_char_or_byte2))
{
chars = xfont->per_char;
if (chars)
width = chars[ch - xfont->min_char_or_byte2].width;
else
width = xfont->min_bounds.width;
}
else
{
width = XTextWidth (xfont, &character, 1);
}
break;
case GDK_FONT_FONTSET:
fontset = (XFontSet) private->xfont;
width = XmbTextEscapement (fontset, &character, 1) ;
break;
default:
width = 0;
}
return width;
}
gint
gdk_char_width_wc (GdkFont *font,
GdkWChar character)
{
GdkFontPrivate *private;
XCharStruct *chars;
gint width;
guint ch = character & 0xff; /* get rid of sign-extension */
XFontStruct *xfont;
XFontSet fontset;
g_return_val_if_fail (font != NULL, -1);
private = (GdkFontPrivate*) font;
switch (font->type)
{
case GDK_FONT_FONT:
/* only 8 bits characters are considered here */
xfont = (XFontStruct *) private->xfont;
if ((xfont->min_byte1 == 0) &&
(xfont->max_byte1 == 0) &&
(ch >= xfont->min_char_or_byte2) &&
(ch <= xfont->max_char_or_byte2))
{
chars = xfont->per_char;
if (chars)
width = chars[ch - xfont->min_char_or_byte2].width;
else
width = xfont->min_bounds.width;
}
else
{
char ch2 = character;
width = XTextWidth (xfont, &ch2, 1);
}
break;
case GDK_FONT_FONTSET:
fontset = (XFontSet) private->xfont;
{
wchar_t char_wc = character;
width = XwcTextEscapement (fontset, &char_wc, 1) ;
}
break;
default:
width = 0;
}
return width;
}
gint
gdk_string_measure (GdkFont *font,
const gchar *string)
{
g_return_val_if_fail (font != NULL, -1);
g_return_val_if_fail (string != NULL, -1);
return gdk_text_measure (font, string, strlen (string));
}
void
gdk_text_extents (GdkFont *font,
const gchar *text,
gint text_length,
gint *lbearing,
gint *rbearing,
gint *width,
gint *ascent,
gint *descent)
{
GdkFontPrivate *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 = (GdkFontPrivate*) 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)
{
GdkFontPrivate *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 = (GdkFontPrivate*) 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;
XwcTextExtents (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_string_extents (GdkFont *font,
const gchar *string,
gint *lbearing,
gint *rbearing,
gint *width,
gint *ascent,
gint *descent)
{
g_return_if_fail (font != NULL);
g_return_if_fail (string != NULL);
gdk_text_extents (font, string, strlen (string),
lbearing, rbearing, width, ascent, descent);
}
gint
gdk_text_measure (GdkFont *font,
const gchar *text,
gint text_length)
{
GdkFontPrivate *private;
XCharStruct overall;
XFontStruct *xfont;
XFontSet fontset;
XRectangle ink, log;
int direction;
int font_ascent;
int font_descent;
gint width;
g_return_val_if_fail (font != NULL, -1);
g_return_val_if_fail (text != NULL, -1);
private = (GdkFontPrivate*) 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);
}
width = overall.rbearing;
break;
case GDK_FONT_FONTSET:
fontset = (XFontSet) private->xfont;
XmbTextExtents (fontset, text, text_length, &ink, &log);
width = log.width;
break;
default:
width = 0;
}
return width;
}
gint
gdk_char_measure (GdkFont *font,
gchar character)
{
g_return_val_if_fail (font != NULL, -1);
return gdk_text_measure (font, &character, 1);
}
gint
gdk_string_height (GdkFont *font,
const gchar *string)
{
g_return_val_if_fail (font != NULL, -1);
g_return_val_if_fail (string != NULL, -1);
return gdk_text_height (font, string, strlen (string));
}
gint
gdk_text_height (GdkFont *font,
const gchar *text,
gint text_length)
{
GdkFontPrivate *private;
XCharStruct overall;
XFontStruct *xfont;
XFontSet fontset;
XRectangle ink, log;
int direction;
int font_ascent;
int font_descent;
gint height;
g_return_val_if_fail (font != NULL, -1);
g_return_val_if_fail (text != NULL, -1);
private = (GdkFontPrivate*) 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);
}
height = overall.ascent + overall.descent;
break;
case GDK_FONT_FONTSET:
fontset = (XFontSet) private->xfont;
XmbTextExtents (fontset, text, text_length, &ink, &log);
height = log.height;
break;
default:
height = 0;
}
return height;
}
gint
gdk_char_height (GdkFont *font,
gchar character)
{
g_return_val_if_fail (font != NULL, -1);
return gdk_text_height (font, &character, 1);
}
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