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Use tsetdirt in tscrollup and tscrolldown.

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tscrollup and tscrolldown do not use tsetdirt, but their code is
equivalent to

        tsetdirt(orig, term.bot-n);
        tsetdirt(orig+n, term.bot);

tclearregion also marks cleared lines as dirty.
In tscrolldown it sets lines from term.bot-n+1 to term.bot dirty, and in
tscrollup it sets lines from orig to orig+n-1 dirty.

In both functions all lines from orig to term.bot are effectively set
dirty, but in tscrolldown lines from orig+n to term.bot are set dirty
twice, and in tscrollup lines from orig to term.bot-n are set dirty
twice.

These patches make it clear which lines are set dirty and sets them
dirty once in each funciton.
This commit is contained in:
noname 2014-04-20 17:26:13 +04:00 committed by Roberto E. Vargas Caballero
parent f9dc374ea0
commit 3afdb4ff04
1 changed files with 4 additions and 6 deletions
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10
st.c
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@ -1399,14 +1399,13 @@ tscrolldown(int orig, int n) {
LIMIT(n, 0, term.bot-orig+1); LIMIT(n, 0, term.bot-orig+1);
tclearregion(0, term.bot-n+1, term.col-1, term.bot); tclearregion(0, term.bot-n+1, term.col-1, term.bot);
tsetdirt(orig, term.bot-n);
tsetdirt(orig+n, term.bot);
for(i = term.bot; i >= orig+n; i--) { for(i = term.bot; i >= orig+n; i--) {
temp = term.line[i]; temp = term.line[i];
term.line[i] = term.line[i-n]; term.line[i] = term.line[i-n];
term.line[i-n] = temp; term.line[i-n] = temp;
term.dirty[i] = 1;
term.dirty[i-n] = 1;
} }
selscroll(orig, n); selscroll(orig, n);
@ -1419,14 +1418,13 @@ tscrollup(int orig, int n) {
LIMIT(n, 0, term.bot-orig+1); LIMIT(n, 0, term.bot-orig+1);
tclearregion(0, orig, term.col-1, orig+n-1); tclearregion(0, orig, term.col-1, orig+n-1);
tsetdirt(orig, term.bot-n);
tsetdirt(orig+n, term.bot);
for(i = orig; i <= term.bot-n; i++) { for(i = orig; i <= term.bot-n; i++) {
temp = term.line[i]; temp = term.line[i];
term.line[i] = term.line[i+n]; term.line[i] = term.line[i+n];
term.line[i+n] = temp; term.line[i+n] = temp;
term.dirty[i] = 1;
term.dirty[i+n] = 1;
} }
selscroll(orig, -n); selscroll(orig, -n);