Supprot mouse-face on mode-line.

2005-05-23  Masatake YAMATO  <jet@gyve.org>

	* xdisp.c (note_mode_line_or_margin_highlight): Added code
	for mouse-face. Change the type of the first argument from `window'
	to `List_Object'.
	(note_mouse_highlight): Call note_mode_line_or_margin_highlight with
	window instead of w.

2005-05-23  Masatake YAMATO  <jet@gyve.org>

	* bindings.el (mode-line-major-mode-keymap): Bind
	[mode-line down-mouse-1] to `mouse-major-mode-menu'.

	* faces.el (mode-line-highlight): New face.

	* ruler-mode.el (ruler-mode-ruler): Use mode-line-highlight
	as mouse-face.

	* bindings.el (top-level, help-echo, mode-line-modified)
	(mode-line-mule-info, mode-line-eol-desc): Use mode-line-highlight
	as mouse-face.

2 files changed, 128 insertions, 5 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 0e4e571e852..2b8bf5bdb92 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,11 @@
+2005-05-23  Masatake YAMATO  <jet@gyve.org>
+
+        * xdisp.c (note_mode_line_or_margin_highlight): Added code
+        for mouse-face. Change the type of the first argument from `window'
+        to `List_Object'.
+        (note_mouse_highlight): Call note_mode_line_or_margin_highlight with
+        window instead of w.
+
 2005-05-22  Andreas Schwab  <schwab@suse.de>
 
         * process.c (send_process): Move misplaced volatile.
diff --git a/src/xdisp.c b/src/xdisp.c
index 5297b1235e9..8a9c1d267af 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -21236,11 +21236,12 @@ define_frame_cursor1 (f, cursor, pointer)
    position relative to the start of the mode line.  */
 
 static void
-note_mode_line_or_margin_highlight (w, x, y, area)
-     struct window *w;
+note_mode_line_or_margin_highlight (window, x, y, area)
+     Lisp_Object window;
      int x, y;
      enum window_part area;
 {
+  struct window *w = XWINDOW (window);
   struct frame *f = XFRAME (w->frame);
   Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
   Cursor cursor = FRAME_X_OUTPUT (f)->nontext_cursor;
@@ -21249,9 +21250,38 @@ note_mode_line_or_margin_highlight (w, x, y, area)
   Lisp_Object string, object = Qnil;
   Lisp_Object pos, help;
 
+  Lisp_Object mouse_face;
+  int original_x_pixel = x;
+  struct glyph * glyph = NULL;
+  struct glyph_row *row;  
+          
   if (area == ON_MODE_LINE || area == ON_HEADER_LINE)
-    string = mode_line_string (w, area, &x, &y, &charpos,
-                               &object, &dx, &dy, &width, &height);
+    {
+      int x0;
+      struct glyph *end;
+
+      string = mode_line_string (w, area, &x, &y, &charpos,
+                                 &object, &dx, &dy, &width, &height);
+
+      row = (area == ON_MODE_LINE)? 
+        MATRIX_MODE_LINE_ROW (w->current_matrix):
+        MATRIX_HEADER_LINE_ROW(w->current_matrix);
+      
+      /* Find glyph */
+      if (row->mode_line_p && row->enabled_p)
+        {
+          glyph = row->glyphs[TEXT_AREA];
+          end = glyph + row->used[TEXT_AREA];
+          
+          for (x0 = original_x_pixel; 
+               glyph < end && x0 >= glyph->pixel_width; 
+               ++glyph)
+            x0 -= glyph->pixel_width;
+        
+          if (glyph >= end)
+            glyph = NULL;
+        }
+    }
   else
     {
       x -= WINDOW_LEFT_SCROLL_BAR_AREA_WIDTH (w);
@@ -21329,6 +21359,91 @@ note_mode_line_or_margin_highlight (w, x, y, area)
           if (!KEYMAPP (map))
             cursor = dpyinfo->vertical_scroll_bar_cursor;
         }
+      
+     /* Change the mouse face according to what is under X/Y.  */
+      mouse_face = Fget_text_property (pos, Qmouse_face, string);
+      if (!NILP (mouse_face)
+          && ((area == ON_MODE_LINE) || (area == ON_HEADER_LINE))
+          && glyph)
+        {
+          Lisp_Object b, e;
+
+          struct glyph * tmp_glyph;
+
+          int gpos;
+          int gseq_length;
+          int total_pixel_width;
+          int ignore;
+
+          if (clear_mouse_face (dpyinfo))
+            cursor = No_Cursor;
+          
+          /* Calculate the position(glyph position: GPOS) of GLYPH in 
+             displayed string. GPOS is different from CHARPOS. 
+             
+             CHARPOS is the position of glyph in internal string
+             object. A mode line string format has structures which
+             is converted to a flatten by emacs lisp interpreter.
+             The internal string is an element of the structures.
+             The displayed string is the flatten string. */
+          for (tmp_glyph = glyph - 1, gpos = 0; 
+               tmp_glyph >= row->glyphs[TEXT_AREA]; 
+               tmp_glyph--, gpos++)
+            {
+              if (tmp_glyph->object != glyph->object)
+                break;
+            }
+
+          /* Calculate the lenght(glyph sequence length: GSEQ_LENGTH) of
+             displayed string holding GLYPH. 
+
+             GSEQ_LENGTH is different from SCHARS (STRING).
+             SCHARS (STRING) returns the length of the internal string. */
+          for (tmp_glyph = glyph, gseq_length = gpos;
+               tmp_glyph < glyph + row->used[TEXT_AREA];
+               tmp_glyph++, gseq_length++)
+              {
+                if (tmp_glyph->object != glyph->object)
+                  break;
+              }
+          
+          b = Fprevious_single_property_change(make_number (charpos + 1),
+                                               Qmouse_face, string, Qnil);
+          e = Fnext_single_property_change (pos, Qmouse_face, string, Qnil);
+          
+          if (NILP (b))
+            b = make_number (0);
+
+          if (NILP (e))
+            e = make_number(gseq_length);
+
+          total_pixel_width = 0;
+          for (tmp_glyph = glyph - (gpos - XINT(b)); tmp_glyph != glyph; tmp_glyph++)
+            total_pixel_width += tmp_glyph->pixel_width;
+          
+          dpyinfo->mouse_face_beg_col = (x - gpos) + XINT(b);
+          dpyinfo->mouse_face_beg_row = (area == ON_MODE_LINE)? 
+            (w->current_matrix)->nrows - 1: 
+            0;
+
+          dpyinfo->mouse_face_beg_x   = original_x_pixel - (total_pixel_width + dx);
+          dpyinfo->mouse_face_beg_y   = 0;
+          
+          dpyinfo->mouse_face_end_col = (x - gpos) + XINT(e);
+          dpyinfo->mouse_face_end_row = dpyinfo->mouse_face_beg_row;
+
+          dpyinfo->mouse_face_end_x   = 0;
+          dpyinfo->mouse_face_end_y   = 0;
+
+          dpyinfo->mouse_face_past_end = 0;
+          dpyinfo->mouse_face_window  = window;
+
+          dpyinfo->mouse_face_face_id = face_at_string_position(w, string, 
+                                                                charpos,
+                                                                0, 0, 0, &ignore,
+                                                                glyph->face_id, 1);
+          show_mouse_face (dpyinfo, DRAW_MOUSE_FACE);
+        }
     }
 
   define_frame_cursor1 (f, cursor, pointer);
@@ -21409,7 +21524,7 @@ note_mouse_highlight (f, x, y)
   if (part == ON_MODE_LINE || part == ON_HEADER_LINE
       || part == ON_LEFT_MARGIN || part == ON_RIGHT_MARGIN)
     {
-      note_mode_line_or_margin_highlight (w, x, y, part);
+      note_mode_line_or_margin_highlight (window, x, y, part);
       return;
     }