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msg: clear lines by printing spaces on MS Windows 

On Windows, no ANSI control sequences are available, so we can't easily
clear lines, move the cursor, etc. It's yet to be decided how this
should be handled (emulate ANSI escapes in osdep/terminal-win.c, or
provide abstracted terminal API functions to unify the Linux and Windows
code).

For now, this fixes the regression that was introduced earlier by the
status line rewrite. It doesn't fix all aspects of status line and
terminal OSD handling, as can be clearly seen by the unconditional use
of terminal_erase_to_end_of_line further down the changed code.

Fixes github issue #499 (sort of).
This commit is contained in:
wm4 2014-02-09 00:45:26 +01:00
parent 8eaf6c42ac
commit 7f744c9a16
1 changed files with 7 additions and 1 deletions
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8
common/msg.c
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@ -149,7 +149,13 @@ static void prepare_status_line(struct mp_log_root *root, char *new_status)
size_t clear_lines = MPMIN(MPMAX(new_lines, old_lines), root->blank_lines);
// clear the status line itself
fprintf(f, "\r%s", terminal_erase_to_end_of_line);
if (terminal_erase_to_end_of_line[0]) {
fprintf(f, "\r%s", terminal_erase_to_end_of_line);
} else {
// This code is for MS windows (no ANSI control sequences)
get_screen_size();
fprintf(f, "\r%*s\r", screen_width - 1, "");
}
// and clear all previous old lines
for (size_t n = 1; n < clear_lines; n++)
fprintf(f, "%s\r%s", terminal_cursor_up, terminal_erase_to_end_of_line);