From e14a8fb0a2cc1514750e27cc1e818be652c0489b Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Sat, 12 Jul 1997 06:49:03 +0000
Subject: [PATCH] Initial revision

---
 src/x-list-font.c | 91 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 src/x-list-font.c

diff --git a/src/x-list-font.c b/src/x-list-font.c
new file mode 100644
index 00000000000..a531123a5b9
--- /dev/null
+++ b/src/x-list-font.c
@@ -0,0 +1,91 @@
+DEFUN ("x-list-fonts", Fx_list_fonts, Sx_list_fonts, 1, 5, 0,
+  "Return a list of the names of available fonts matching PATTERN.\n\
+If optional arguments FACE and FRAME are specified, return only fonts\n\
+the same size as FACE on FRAME.\n\
+PATTERN is a string, perhaps with wildcard characters;\n\
+  the * character matches any substring, and\n\
+  the ? character matches any single character.\n\
+  PATTERN is case-insensitive.\n\
+FACE is a face name--a symbol.\n\
+\n\
+The return value is a list of strings, suitable as arguments to\n\
+set-face-font.\n\
+\n\
+Fonts Emacs can't use (i.e. proportional fonts) may or may not be excluded\n\
+even if they match PATTERN and FACE.\n\
+The optional fourth argument MAXIMUM sets a limit on how many\n\
+fonts to match.  The first MAXIMUM fonts are reported.\n\
+The optional fifth argument WIDTH, if specified, is a number of columns\n\
+occupied by a character of a font.  In that case, return only fonts\n\
+the WIDTH times as wide as FACE on FRAME.")
+  (pattern, face, frame, maximum, width)
+    Lisp_Object pattern, face, frame, maximum, width;
+{
+  FRAME_PTR f;
+  int size, cols;
+  int maxnames;
+
+  check_x ();
+  CHECK_STRING (pattern, 0);
+  if (!NILP (face))
+    CHECK_SYMBOL (face, 1);
+
+  if (NILP (maximum))
+    maxnames = 2000;
+  else
+    {
+      CHECK_NATNUM (maximum, 0);
+      maxnames = XINT (maximum);
+    }
+
+  if (!NILP (width))
+    CHECK_NUMBER (width, 4);
+
+  /* We can't simply call check_x_frame because this function may be
+     called before any frame is created.  */
+  if (NILP (frame))
+    f = selected_frame;
+  else
+    {
+      CHECK_LIVE_FRAME (frame, 0);
+      f = XFRAME (frame);
+    }
+  if (! FRAME_X_P (f))
+    {
+      /* Perhaps we have not yet created any frame.  */
+      f = NULL;
+      face = Qnil;
+    }
+
+  /* Determine the width standard for comparison with the fonts we find.  */
+
+  if (NILP (face))
+    size = 0;
+  else
+    {
+      int face_id;
+
+      face_id = face_name_id_number (f, face);
+
+      if (face_id < 0 || face_id >= FRAME_N_PARAM_FACES (f)
+	  || FRAME_PARAM_FACES (f) [face_id] == 0
+	  || FRAME_PARAM_FACES (f) [face_id]->font == (XFontStruct *) (~0))
+	size = f->output_data.x->font->max_bounds.width;
+      else
+	size = FRAME_PARAM_FACES (f) [face_id]->font->max_bounds.width;
+
+      if (!NILP (width))
+	  size *= XINT (width);
+    }
+
+  {
+    Lisp_Object args[2];
+
+    args[0] = x_list_fonts (f, pattern, size, maxnames);
+    if (f == NULL)
+      /* We don't have to check fontsets.  */
+      return args[0];
+    args[1] = list_fontsets (f, pattern, size);
+    return Fnconc (make_number (2), args);
+  }
+}
-- 
2.39.5