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screen: initialize screen properly with early set display-=msgsep

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Currently `nvim -u NORC --cmd "set display-=msgsep"` will still allocate the
message grid and remove it just afterwards. While inefficient, we must
make sure update_screen() re-validates the default_grid completely when
this happens.

Fix some invalid logic: don't reallocate msg_grid on resize when the grid is not
used.

Elide a too early ui_flush() on startup, which caused an invalid cursor
position to be used.
This commit is contained in:
Björn Linse
2019-09-02 10:46:24 +02:00
parent 099445cc07
commit 66f4e8aee0
3 changed files with 19 additions and 5 deletions
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6
src/nvim/screen.c
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@@ -404,7 +404,7 @@ int update_screen(int type)
default_grid.valid = true;
}
if (type == NOT_VALID && msg_dothrottle()) {
if (type == NOT_VALID && (msg_dothrottle() || msg_grid.chars)) {
grid_fill(&default_grid, Rows-p_ch, Rows, 0, Columns, ' ', ' ', 0);
}
@@ -7288,9 +7288,9 @@ void screen_resize(int width, int height)
}
}
}
ui_flush();
}
ui_flush();
--busy;
busy--;
}
/// Check if the new Nvim application "shell" dimensions are valid.