* 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
+ * 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
- * Library General Public License for more details.
+ * Lesser 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * 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.
*/
-#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;
- }
+/*
+ * 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/.
+ */
- gdk_xid_table_insert (&((XFontStruct *) private->xfont)->fid, font);
+#undef GDK_DISABLE_DEPRECATED
- return font;
-}
+#include "gdkdisplay.h"
+#include "gdkfont.h"
+#include "gdkinternals.h"
-GdkFont*
-gdk_fontset_load (gchar *fontset_name)
+GType
+gdk_font_get_type (void)
{
- 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_print ("Missing charsets in FontSet creation\n");
- for (i=0;i<missing_charset_count;i++)
- g_print (" %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;
+ static GType our_type = 0;
+
+ if (our_type == 0)
+ our_type = g_boxed_type_register_static ("GdkFont",
+ (GBoxedCopyFunc)gdk_font_ref,
+ (GBoxedFreeFunc)gdk_font_unref);
+ return our_type;
}
+/**
+ * gdk_font_ref:
+ * @font: a #GdkFont
+ *
+ * Increases the reference count of a font by one.
+ *
+ * Return value: @font
+ **/
GdkFont*
gdk_font_ref (GdkFont *font)
{
return font;
}
+/**
+ * gdk_font_unref:
+ * @font: a #GdkFont
+ *
+ * Decreases the reference count of a font by one.
+ * If the result is zero, destroys the font.
+ **/
void
gdk_font_unref (GdkFont *font)
{
GdkFontPrivate *private;
+ private = (GdkFontPrivate*) font;
g_return_if_fail (font != NULL);
-
- private = (GdkFontPrivate*) font;
+ g_return_if_fail (private->ref_count > 0);
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);
- }
+ _gdk_font_destroy (font);
}
+/**
+ * gdk_string_width:
+ * @font: a #GdkFont
+ * @string: the nul-terminated string to measure
+ *
+ * Determines the width of a nul-terminated string.
+ * (The distance from the origin of the string to the
+ * point where the next string in a sequence of strings
+ * should be drawn)
+ *
+ * Return value: the width of the string in pixels.
+ **/
gint
-gdk_font_id (GdkFont *font)
+gdk_string_width (GdkFont *font,
+ const gchar *string)
{
- GdkFontPrivate *font_private;
+ g_return_val_if_fail (font != NULL, -1);
+ g_return_val_if_fail (string != NULL, -1);
- g_return_val_if_fail (font != NULL, 0);
+ return gdk_text_width (font, string, _gdk_font_strlen (font, string));
+}
- font_private = (GdkFontPrivate*) font;
+/**
+ * gdk_char_width:
+ * @font: a #GdkFont
+ * @character: the character to measure.
+ *
+ * Determines the width of a given character.
+ *
+ * Return value: the width of the character in pixels.
+ **/
+gint
+gdk_char_width (GdkFont *font,
+ gchar character)
+{
+ g_return_val_if_fail (font != NULL, -1);
- if (font->type == GDK_FONT_FONT)
- {
- return ((XFontStruct *) font_private->xfont)->fid;
- }
- else
- {
- return 0;
- }
+ return gdk_text_width (font, &character, 1);
}
+/**
+ * gdk_char_width_wc:
+ * @font: a #GdkFont
+ * @character: the character to measure.
+ *
+ * Determines the width of a given wide character. (Encoded
+ * in the wide-character encoding of the current locale).
+ *
+ * Return value: the width of the character in pixels.
+ **/
gint
-gdk_font_equal (GdkFont *fonta,
- GdkFont *fontb)
+gdk_char_width_wc (GdkFont *font,
+ GdkWChar character)
{
- GdkFontPrivate *privatea;
- GdkFontPrivate *privateb;
-
- g_return_val_if_fail (fonta != NULL, FALSE);
- g_return_val_if_fail (fontb != NULL, FALSE);
-
- privatea = (GdkFontPrivate*) fonta;
- privateb = (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;
+ g_return_val_if_fail (font != NULL, -1);
+
+ return gdk_text_width_wc (font, &character, 1);
}
+/**
+ * gdk_string_measure:
+ * @font: a #GdkFont
+ * @string: the nul-terminated string to measure.
+ *
+ * Determines the distance from the origin to the rightmost
+ * portion of a nul-terminated string when drawn. This is not the
+ * correct value for determining the origin of the next
+ * portion when drawing text in multiple pieces.
+ * See gdk_string_width().
+ *
+ * Return value: the right bearing of the string in pixels.
+ **/
gint
-gdk_string_width (GdkFont *font,
- const gchar *string)
+gdk_string_measure (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;
+ return gdk_text_measure (font, string, _gdk_font_strlen (font, string));
+}
+
+/**
+ * gdk_string_extents:
+ * @font: a #GdkFont.
+ * @string: the nul-terminated string to measure.
+ * @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 nul-terminated string.
+ **/
+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, _gdk_font_strlen (font, string),
+ lbearing, rbearing, width, ascent, descent);
}
+
+/**
+ * gdk_text_measure:
+ * @font: a #GdkFont
+ * @text: the text to measure.
+ * @text_length: the length of the text in bytes.
+ *
+ * Determines the distance from the origin to the rightmost
+ * portion of a string when drawn. This is not the
+ * correct value for determining the origin of the next
+ * portion when drawing text in multiple pieces.
+ * See gdk_text_width().
+ *
+ * Return value: the right bearing of the string in pixels.
+ **/
gint
-gdk_text_width (GdkFont *font,
- const gchar *text,
- gint text_length)
+gdk_text_measure (GdkFont *font,
+ const gchar *text,
+ gint text_length)
{
- GdkFontPrivate *private;
- gint width;
- XFontStruct *xfont;
- XFontSet fontset;
+ gint rbearing;
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;
+ gdk_text_extents (font, text, text_length, NULL, &rbearing, NULL, NULL, NULL);
+ return rbearing;
}
-/* Problem: What if a character is a 16 bits character ?? */
+/**
+ * gdk_char_measure:
+ * @font: a #GdkFont
+ * @character: the character to measure.
+ *
+ * Determines the distance from the origin to the rightmost
+ * portion of a character when drawn. This is not the
+ * correct value for determining the origin of the next
+ * portion when drawing text in multiple pieces.
+ *
+ * Return value: the right bearing of the character in pixels.
+ **/
gint
-gdk_char_width (GdkFont *font,
- gchar character)
+gdk_char_measure (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;
+ return gdk_text_measure (font, &character, 1);
}
+/**
+ * gdk_string_height:
+ * @font: a #GdkFont
+ * @string: the nul-terminated string to measure.
+ *
+ * Determines the total height of a given nul-terminated
+ * string. This value is not generally useful, because you
+ * cannot determine how this total height will be drawn in
+ * relation to the baseline. See gdk_string_extents().
+ *
+ * Return value: the height of the string in pixels.
+ **/
gint
-gdk_string_measure (GdkFont *font,
- const gchar *string)
+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_measure (font, string, strlen (string));
+ return gdk_text_height (font, string, _gdk_font_strlen (font, string));
}
+/**
+ * gdk_text_height:
+ * @font: a #GdkFont
+ * @text: the text to measure.
+ * @text_length: the length of the text in bytes.
+ *
+ * Determines the total height of a given string.
+ * This value is not generally useful, because you cannot
+ * determine how this total height will be drawn in
+ * relation to the baseline. See gdk_text_extents().
+ *
+ * Return value: the height of the string in pixels.
+ **/
gint
-gdk_text_measure (GdkFont *font,
- const gchar *text,
- gint text_length)
+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 width;
+ gint ascent, descent;
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;
+ gdk_text_extents (font, text, text_length, NULL, NULL, NULL, &ascent, &descent);
+ return ascent + descent;
}
+/**
+ * gdk_char_height:
+ * @font: a #GdkFont
+ * @character: the character to measure.
+ *
+ * Determines the total height of a given character.
+ * This value is not generally useful, because you cannot
+ * determine how this total height will be drawn in
+ * relation to the baseline. See gdk_text_extents().
+ *
+ * Return value: the height of the character in pixels.
+ **/
gint
-gdk_char_measure (GdkFont *font,
- gchar character)
+gdk_char_height (GdkFont *font,
+ gchar character)
{
g_return_val_if_fail (font != NULL, -1);
- return gdk_text_measure (font, &character, 1);
+ return gdk_text_height (font, &character, 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)
+{
+ return gdk_font_from_description_for_display (gdk_display_get_default (),font_desc);
+}
+
+/**
+ * gdk_font_load:
+ * @font_name: a XLFD describing the font to load.
+ *
+ * Loads a font.
+ *
+ * The font may be newly loaded or looked up the font in a cache.
+ * You should make no assumptions about the initial reference count.
+ *
+ * Return value: a #GdkFont, or %NULL if the font could not be loaded.
+ **/
+GdkFont*
+gdk_font_load (const gchar *font_name)
+{
+ return gdk_font_load_for_display (gdk_display_get_default(), font_name);
+}
+
+
projects / ~andy / gtk / blobdiff