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factored code and fixed behaviour of tnewline().

This commit is contained in:
Aurélien Aptel 2010-09-01 23:20:54 +02:00
parent 32e160c939
commit 97695baf4f
1 changed files with 20 additions and 40 deletions
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60
st.c
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@ -161,8 +161,8 @@ static void tputc(char);
static void tputs(char*, int);
static void treset(void);
static void tresize(int, int);
static void tscrollup(int);
static void tscrolldown(int);
static void tscrollup(int, int);
static void tscrolldown(int, int);
static void tsetattr(int*, int);
static void tsetchar(char);
static void tsetscroll(int, int);
@ -459,15 +459,15 @@ tswapscreen(void) {
}
void
tscrolldown (int n) {
tscrolldown(int orig, int n) {
int i;
Line temp;
LIMIT(n, 0, term.bot-term.top+1);
LIMIT(n, 0, term.bot-orig+1);
tclearregion(0, term.bot-n+1, term.col-1, term.bot);
for(i = term.bot; i >= term.top+n; i--) {
for(i = term.bot; i >= orig+n; i--) {
temp = term.line[i];
term.line[i] = term.line[i-n];
term.line[i-n] = temp;
@ -475,14 +475,14 @@ tscrolldown (int n) {
}
void
tscrollup (int n) {
tscrollup(int orig, int n) {
int i;
Line temp;
LIMIT(n, 0, term.bot-term.top+1);
LIMIT(n, 0, term.bot-orig+1);
tclearregion(0, term.top, term.col-1, term.top+n-1);
tclearregion(0, orig, term.col-1, orig+n-1);
for(i = term.top; i <= term.bot-n; i++) {
for(i = orig; i <= term.bot-n; i++) {
temp = term.line[i];
term.line[i] = term.line[i+n];
term.line[i+n] = temp;
@ -491,9 +491,11 @@ tscrollup (int n) {
void
tnewline(void) {
int y = term.c.y + 1;
if(y > term.bot)
tscrollup(1), y = term.bot;
int y = term.c.y;
if(term.c.y == term.bot)
tscrollup(term.top, 1);
else
y++;
tmoveto(0, y);
}
@ -585,40 +587,18 @@ tinsertblank(int n) {
void
tinsertblankline(int n) {
int i;
Line blank;
int bot = term.bot;
if(term.c.y < term.top || term.c.y > term.bot)
return;
LIMIT(n, 0, bot-term.c.y+1);
tclearregion(0, bot-n+1, term.col-1, bot);
for(i = bot; i >= term.c.y+n; i--) {
/* swap deleted line <-> blanked line */
blank = term.line[i];
term.line[i] = term.line[i-n];
term.line[i-n] = blank;
}
tscrolldown(term.c.y, n);
}
void
tdeleteline(int n) {
int i;
Line blank;
int bot = term.bot;
if(term.c.y < term.top || term.c.y > term.bot)
return;
LIMIT(n, 0, bot-term.c.y+1);
tclearregion(0, term.c.y, term.col-1, term.c.y+n-1);
for(i = term.c.y; i <= bot-n; i++) {
/* swap deleted line <-> blanked line */
blank = term.line[i];
term.line[i] = term.line[i+n];
term.line[i+n] = blank;
}
tscrollup(term.c.y, n);
}
void
@ -790,11 +770,11 @@ csihandle(void) {
break;
case 'S': /* SU -- Scroll <n> line up */
DEFAULT(escseq.arg[0], 1);
tscrollup(escseq.arg[0]);
tscrollup(term.top, escseq.arg[0]);
break;
case 'T': /* SD -- Scroll <n> line down */
DEFAULT(escseq.arg[0], 1);
tscrolldown(escseq.arg[0]);
tscrolldown(term.top, escseq.arg[0]);
break;
case 'L': /* IL -- Insert <n> blank lines */
DEFAULT(escseq.arg[0], 1);
@ -984,7 +964,7 @@ tputc(char c) {
break;
case 'D': /* IND -- Linefeed */
if(term.c.y == term.bot)
tscrollup(1);
tscrollup(term.top, 1);
else
tmoveto(term.c.x, term.c.y+1);
term.esc = 0;
@ -995,7 +975,7 @@ tputc(char c) {
break;
case 'M': /* RI -- Reverse index */
if(term.c.y == term.top)
tscrolldown(1);
tscrolldown(term.top, 1);
else
tmoveto(term.c.x, term.c.y-1);
term.esc = 0;