Added functions gdk_text_height, gdk_string_height, gdk_char_height to

Thu Jun 25 10:50:34 1998  Stefan Jeske  <stefan@gtk.org>

	* gdk/gdk.h gdk/gdkfont.c: Added functions gdk_text_height,
 	gdk_string_height, gdk_char_height to retrieve the exact
	height of a text.

3 files changed, 156 insertions, 13 deletions

diff --git a/gdk/gdk.h b/gdk/gdk.h
index 7d1815340c..2713772066 100644
--- a/gdk/gdk.h
+++ b/gdk/gdk.h
@@ -489,26 +489,33 @@ gint gdk_color_equal	 (GdkColor	*colora,
 /* Fonts
  */
 GdkFont* gdk_font_load	    (const gchar    *font_name);
-GdkFont* gdk_fontset_load   (gchar    *fontset_name);
-GdkFont* gdk_font_ref	    (GdkFont  *font);
-void	 gdk_font_unref	    (GdkFont  *font);
+GdkFont* gdk_fontset_load   (gchar          *fontset_name);
+GdkFont* gdk_font_ref	    (GdkFont        *font);
+void	 gdk_font_unref	    (GdkFont        *font);
 gint	 gdk_font_id	    (const GdkFont  *font);
 gint	 gdk_font_equal	    (const GdkFont  *fonta,
 			     const GdkFont  *fontb);
-gint	 gdk_string_width   (GdkFont  *font,
+gint	 gdk_string_width   (GdkFont        *font,
 			     const gchar    *string);
-gint	 gdk_text_width	    (GdkFont  *font,
+gint	 gdk_text_width	    (GdkFont        *font,
 			     const gchar    *text,
-			     gint      text_length);
-gint	 gdk_char_width	    (GdkFont  *font,
-			     gchar     character);
-gint	 gdk_string_measure (GdkFont  *font,
+			     gint            text_length);
+gint	 gdk_char_width	    (GdkFont        *font,
+			     gchar           character);
+gint	 gdk_string_measure (GdkFont        *font,
 			     const gchar    *string);
-gint	 gdk_text_measure   (GdkFont  *font,
+gint	 gdk_text_measure   (GdkFont        *font,
 			     const gchar    *text,
-			     gint      text_length);
-gint	 gdk_char_measure   (GdkFont  *font,
-			     gchar     character);
+			     gint            text_length);
+gint	 gdk_char_measure   (GdkFont        *font,
+			     gchar           character);
+gint	 gdk_string_height  (GdkFont        *font,
+			     const gchar    *string);
+gint	 gdk_text_height    (GdkFont        *font,
+			     const gchar    *text,
+			     gint            text_length);
+gint	 gdk_char_height    (GdkFont        *font,
+			     gchar           character);
 
 
 /* Drawing
diff --git a/gdk/gdkfont.c b/gdk/gdkfont.c
index 352de2003f..acc82f2b62 100644
--- a/gdk/gdkfont.c
+++ b/gdk/gdkfont.c
@@ -385,3 +385,71 @@ gdk_char_measure (GdkFont *font,
 
   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);
+}
diff --git a/gdk/x11/gdkfont-x11.c b/gdk/x11/gdkfont-x11.c
index 352de2003f..acc82f2b62 100644
--- a/gdk/x11/gdkfont-x11.c
+++ b/gdk/x11/gdkfont-x11.c
@@ -385,3 +385,71 @@ gdk_char_measure (GdkFont *font,
 
   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);
+}