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authorDmitry Antipov <dmantipov@yandex.ru>2012-12-13 12:04:40 +0400
committerDmitry Antipov <dmantipov@yandex.ru>2012-12-13 12:04:40 +0400
commit40d1e43460b2f642bf1b4255a903c8ff2311b5f6 (patch)
tree685c228dc7638ab0b32a77097cb68d1d8e7541b5 /lisp/emacs-lisp/trace.el
parentba30c70fa0afecc413b0bdf0bed0788c52a099d3 (diff)
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Minor redisplay optimization when the region length is zero.
* xdisp.c (markpos_of_region): New function. (init_iterator): Do not highlight the region of zero length. (redisplay_window): Check whether the region is of non-zero length. (try_cursor_movement): Allow if the region length is zero. (try_window_reusing_current_matrix, try_window_id): Likewise.
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