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display: scroll horizontally one column earlier 

In this way, for single-width characters, one can see what character is
ahead of the cursor before actually moving the cursor to that position,
and, for double-width characters, the cursor never sits on a placeholder
but always shows the character that is actually there.

This addresses https://savannah.gnu.org/bugs/?55716.
master
Benno Schulenberg 2019-03-03 14:50:43 +01:00
parent 37c8232f4d
commit 85e895508b
1 changed files with 2 additions and 2 deletions
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4
src/utils.c
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@ -367,10 +367,10 @@ char *free_and_assign(char *dest, char *src)
* get_page_start(column) < COLS). */ * get_page_start(column) < COLS). */
size_t get_page_start(size_t column) size_t get_page_start(size_t column)
{ {
if (column < editwincols - 1 || ISSET(SOFTWRAP) || column == 0) if (column + 2 < editwincols || ISSET(SOFTWRAP) || column == 0)
return 0; return 0;
else if (editwincols > 8) else if (editwincols > 8)
return column - 7 - (column - 7) % (editwincols - 8); return column - 6 - (column - 6) % (editwincols - 8);
else else
return column - (editwincols - 2); return column - (editwincols - 2);
} }