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From: Nick Roberts <nickrob@snap.net.nz>
To: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: [PATCH] Console based mouse face highlighting.
Date: Tue, 15 May 2007 15:53:16 +1200	[thread overview]
Message-ID: <17993.11948.400368.430713@kahikatea.snap.net.nz> (raw)
In-Reply-To: <uk5vaepi1.fsf@gnu.org>

 > I think curX and curY store the current location of the cursor.  They
 > are updated in cm.c.

OK, thanks.  Is cursor movement expensive on GNU/Linux?  If not, I would do
something like below in term_show_mouse_face.  That would just leave drawing
the highlighting where I've now put TODO (previously I manipulated write_glyphs
to use mouse_face_face_id but that was probably wrong).  msdos.c uses:

	  IT_set_face (dpyinfo->mouse_face_face_id);
	  _farsetsel (_dos_ds);
	  while (nglyphs--)
	    {
	      _farnspokeb (offset, ScreenAttrib);
	      offset += 2;
	    }
	  if (screen_virtual_segment)
	    dosv_refresh_virtual_screen (start_offset, end_hpos - start_hpos);


Can I write directly to the screen like this in term.c?  Or do I have to modify
the current glyph matrix somehow? (Which might be what xdisp.c does.)

-- 
Nick                                           http://www.inet.net.nz/~nickrob


>From term_show_mouse_face in my term.c:


	  if(draw_mouse_face == DRAW_MOUSE_FACE)
	    {
	      //TODO
	    }
	  else /* draw_mouse_face == DRAW_NORMAL_TEXT */
	    {
	      /* write_glyphs writes at cursor position, so we need to
		 temporarily move cursor coordinates to the beginning of
		 the highlight region.  */

	      /* Save current cursor co-ordinates */
	      save_x = curX;
	      save_y = curY;

	      pos_x = row->used[LEFT_MARGIN_AREA] + start_hpos
		+ WINDOW_LEFT_EDGE_X (w);
	      pos_y = row->y + WINDOW_TOP_EDGE_Y (w);
	
	      cursor_to (pos_x, pos_y);
	      write_glyphs (row->glyphs[TEXT_AREA] + start_hpos, nglyphs);
	      cursor_to (save_x, save_y);
	    }
	}

  reply	other threads:[~2007-05-15  3:53 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-05-12 10:02 [PATCH] Console based mouse face highlighting Nick Roberts
2007-05-12 10:11 ` Nick Roberts
2007-05-12 13:25 ` Eli Zaretskii
2007-05-12 23:54   ` Nick Roberts
2007-05-13  3:42     ` Eli Zaretskii
2007-05-13  4:19       ` Nick Roberts
2007-05-13  4:41         ` Eli Zaretskii
2007-05-14 21:11           ` Nick Roberts
2007-05-15  3:26             ` Eli Zaretskii
2007-05-15  3:53               ` Nick Roberts [this message]
2007-05-15 21:15                 ` Eli Zaretskii
2007-05-15 21:33                   ` David Kastrup
2007-05-16  3:16                     ` Eli Zaretskii
2007-05-15 22:39                   ` [PATCH/Now RFA] " Nick Roberts
2007-05-16  3:24                     ` Eli Zaretskii
2007-05-16  3:54                       ` Nick Roberts
2007-05-16 10:00                         ` [RFA] " Nick Roberts
2007-05-16 18:19                           ` Eli Zaretskii
2007-05-16 21:46                             ` Nick Roberts
2007-05-17  3:24                               ` Eli Zaretskii
2007-05-17  3:54                                 ` Nick Roberts
2007-05-17 14:59                                   ` Stefan Monnier
2007-05-17 20:29                                     ` Eli Zaretskii
2007-05-17 22:29                                     ` Nick Roberts
2007-05-17 20:14                                   ` Eli Zaretskii
2007-05-17 22:34                                     ` Nick Roberts
2007-05-18 14:33                                       ` Eli Zaretskii
2007-05-18 21:09                                         ` Nick Roberts
2007-05-19  7:25                                           ` Eli Zaretskii
2007-05-19  8:15                                             ` Nick Roberts
2007-05-19  8:46                                               ` Eli Zaretskii
2007-05-20  6:00                                                 ` Nick Roberts
2007-05-20  9:37                                                   ` Johan Bockgård
2007-05-20  9:51                                                     ` Nick Roberts
2007-05-22 15:54                                                       ` Johan Bockgård
2007-05-22 21:36                                                         ` Nick Roberts
2007-05-30  5:41                                                           ` Nick Roberts
2007-06-03  1:12                                                         ` Nick Roberts
2007-06-03 21:27                                                           ` Richard Stallman
2007-06-03 22:15                                                             ` Drew Adams
2007-06-03 23:31                                                             ` Nick Roberts
2007-06-04  3:24                                                               ` Eli Zaretskii
2007-05-20 18:54                                                   ` Eli Zaretskii
2007-05-20 20:12                                                     ` Renaming NEWS [was: [RFA] Console based mouse face highlighting.] Glenn Morris
2007-05-20 20:42                                                       ` Nick Roberts
2007-05-20 21:31                                                       ` Renaming NEWS Miles Bader
2007-05-21  8:09                                                         ` Glenn Morris
2007-05-21  8:42                                                           ` David Kastrup
2007-05-22  6:46                                                             ` Glenn Morris
2007-05-22  7:12                                                               ` Miles Bader
2007-05-22 17:08                                                                 ` Glenn Morris
2007-05-22  8:30                                                           ` Richard Stallman
2007-05-22 17:09                                                             ` Glenn Morris
2007-05-21 10:33                                                       ` Renaming NEWS [was: [RFA] Console based mouse face highlighting.] Richard Stallman
2007-05-19 22:31                                               ` [RFA] Console based mouse face highlighting Richard Stallman
2007-05-14 16:57     ` [PATCH] " Stefan Monnier

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