Problem with bleed-through of extent properties to preceding end-glyph

The following has the unexpected/unsatisfactory behaviour of turning the 'X' (the end-glyph of the the 1st extent) bold: (progn (pop-to-buffer (get-buffer-create "*test*")) (let ((str1 "abc") (str2 ".") (glyph1 (make-glyph "X"))) (add-text-properties 0 3 `(end-glyph ,glyph1) str1) (add-text-properties 0 1 `(face bold) str2) (insert str1)(insert str2))) I'm pretty sure this counts as a bug, not a feature. At its most extreme (and of course when the glyphs involved are real images), it prevents accumulating several adjacent images, e.g. (progn (pop-to-buffer (get-buffer-create "*test*")) (let ((str1 "abc") (str2 "def") (glyph1 (make-glyph "X")) (glyph2 (make-glyph "Y"))) (add-text-properties 0 3 `(end-glyph ,glyph1 invisible t) str1) (add-text-properties 0 3 `(end-glyph ,glyph2 invisible t) str2) (insert str1)(insert str2))) This causes real problems for ecb. The best evidence I can give that this is a bug is that the nearly-corresponding code for Emacs does not have the bleed-through property: (progn (pop-to-buffer (get-buffer-create "*test*")) (let ((str1 "abc") (str2 "l")) (add-text-properties 0 3 '(display "X") str1) (add-text-properties 0 1 '(face bold) str2) (insert str1)(insert str2))) I'm afraid I have no familiarity at all with the low-level display code, confirmed by a brief fruitless exploration of extent.c, so no chance of contributing a fix, but I'm willing to try again if someone has some hints as to what the problem might be. Thanks, ht -- Henry S. Thompson, School of Informatics, University of Edinburgh Half-time member of W3C Team 10 Crichton Street, Edinburgh EH8 9AB, SCOTLAND -- (44) 131 650-4440 Fax: (44) 131 651-1426, e-mail: ht(a)inf.ed.ac.uk URL: http://www.ltg.ed.ac.uk/~ht/ [mail really from me _always_ has this .sig -- mail without it is forged spam] _______________________________________________ XEmacs-Beta mailing list XEmacs-Beta(a)xemacs.org http://calypso.tux.org/cgi-bin/mailman/listinfo/xemacs-beta