Added gdk_text/string_extents() - too calculate all the metrics at once of

Tue Jul 21 12:42:01 1998  Owen Taylor  <otaylor@redhat.com>

	* gdk/gdk.h gdk/gdkfont.c: Added gdk_text/string_extents() -
	  too calculate all the metrics at once of a string, including
	  things which weren't calculated before.

	* gtk/Makefile.am gtk/gtk.h gtk/gtktearoffmenu.[ch]: New
	  MenuItem type, that when put as the first thing in a
	  menu, makes the menu tearoff. Currently drawn as a
	  dashed line.

	* gtk/gtkmenuitem.h gtk/gtkcheckmenuitem.c: Added a flag
	  "hide_on_activate" to the MenuItem class structure to allow
	  check and radio buttons to be changed with <Space> without
	  hiding the menu.

	* gtk/gtkaccellabel.[ch]: Added new capabilities to set
	  a underline_group and underline_mods for the label -
	  accelerators added in the underline group matching
	  underline_mods will be displayed as an underline character.

	  This doesn't work - Save As needs to be underlined
	  as Save _As.

	* gtk/gtkitemfactory.c:
	  - Create a AccelGroup for each MenuShell we create.
	  - If an '&' appears before a  character 'c' in the path,
	    then make 'c' an accelerator in the menu's accel group,
	    and if the menuitem is menubar <alt>C an accelerator
	    in the itemfactory's accel group.

	* gtk/gtklabel.[ch]: Add support for a pattern arg -
          which is a string. If an '_' appears in this string,
	  the corresponding position in the label is underlined.

          Add gtk_label_parse_uline() convenience function which
	  takes a string with embedded underlines, sets the
	  pattern and label, and returns the accelerator keyval.

	* gtk/gtkmenu.[ch]: Make menus no longer a toplevel widget.
	  Instead, they create a GtkWindow and add themselves
	  to that. (When torn off, another new feature, they
	  create another GtkWindow to hold the torn off menu)

	  New function gtk_menu_set_tearoff_state()

	* gtk/gtkenums.h gtk/gtkmenushell.[ch] gtk/gtkenums.h:
	  Added action signals  for keyboard navigation of menus.

	* gtk/gtkmenushell.c: Key press handler which activates
          bindings for navigation, and accelerators, for handling
	  underline accelerators. Exported functions to select
	  and activate menu items in a menushell.

	* gtk/testgtk.c: Added a new "Item Factory" test which
	  tests GtkItemFactory and the new keyboard navigation
	  of menus.

gdk/gdkfont.c

@@ -328,6 +328,92 @@ gdk_string_measure (GdkFont     *font,
   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.y;
+      if (width)
+	*width = logical.width;
+      if (ascent)
+	*ascent = ink.height;
+      if (descent)
+	*descent = -ink.y;
+      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,