X-Git-Url: https://git.xinqibao.xyz/st.git/blobdiff_plain/cfe897554d4467fdf4c002429370fc7716e419bc..97695baf4f9bc3632792a3330fb46e188ef166a2:/st.c?ds=sidebyside

diff --git a/st.c b/st.c
index a5cca17..5633e40 100644
--- a/st.c
+++ b/st.c
@@ -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);
@@ -387,10 +387,10 @@ dump(char c) {
 
 void
 ttyread(void) {
-	char buf[BUFSIZ] = {0};
+	char buf[BUFSIZ];
 	int ret;
 
-	if((ret = read(cmdfd, buf, BUFSIZ)) < 0)
+	if((ret = read(cmdfd, buf, LEN(buf))) < 0)
 		die("Couldn't read from shell: %s\n", SERRNO);
 	else
 		tputs(buf, ret);
@@ -459,16 +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);
 
-	for(i = 0; i < n; i++)
-		memset(term.line[term.bot-i], 0, term.col*sizeof(Glyph));
+	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;
@@ -476,15 +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);
 	
-	for(i = 0; i < n; i++)
-		memset(term.line[term.top+i], 0, term.col*sizeof(Glyph));
+	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;
@@ -493,9 +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);
 }
 
@@ -587,50 +587,18 @@ tinsertblank(int n) {
 
 void
 tinsertblankline(int n) {
-	int i;
-	Line blank;
-	int bot = term.bot;
-
-	if(term.c.y > term.bot)
-		bot = term.row - 1;
-	else if(term.c.y < term.top)
-		bot = term.top - 1;
-	if(term.c.y + n >= bot) {
-		tclearregion(0, term.c.y, term.col-1, bot);
+	if(term.c.y < term.top || term.c.y > term.bot)
 		return;
-	}
-	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;
-		/* blank it */
-		memset(blank, 0, term.col * sizeof(Glyph));
-	}
+
+	tscrolldown(term.c.y, n);
 }
 
 void
 tdeleteline(int n) {
-	int i;
-	Line blank;
-	int bot = term.bot;
-
-	if(term.c.y > term.bot)
-		bot = term.row - 1;
-	else if(term.c.y < term.top)
-		bot = term.top - 1;
-	if(term.c.y + n >= bot) {
-		tclearregion(0, term.c.y, term.col-1, bot);
+	if(term.c.y < term.top || term.c.y > term.bot)
 		return;
-	}
-	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;
-		/* blank it */
-		memset(blank, 0, term.col * sizeof(Glyph));
-	}
+
+	tscrollup(term.c.y, n);
 }
 
 void
@@ -802,11 +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);
@@ -957,7 +925,8 @@ tputc(char c) {
 				term.esc = 0;
 				csiparse(), csihandle();
 			}
-		} else if(term.esc & ESC_OSC) {
+			/* TODO: handle other OSC */
+		} else if(term.esc & ESC_OSC) { 
 			if(c == ';') {
 				term.titlelen = 0;
 				term.esc = ESC_START | ESC_TITLE;
@@ -995,7 +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;
@@ -1006,7 +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;
@@ -1201,18 +1170,18 @@ xinit(void) {
 	xloadcols();
 
 	/* windows */
-	xw.h = term.row * xw.ch + 2*BORDER;
-	xw.w = term.col * xw.cw + 2*BORDER;
+	xw.bufh = term.row * xw.ch;
+	xw.bufw = term.col * xw.cw;
+	xw.h = xw.bufh + 2*BORDER;
+	xw.w = xw.bufw + 2*BORDER;
 	xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
 			xw.w, xw.h, 0,
 			dc.col[DefaultBG],
 			dc.col[DefaultBG]);
-	xw.bufw = xw.w - 2*BORDER;
-	xw.bufh = xw.h - 2*BORDER;
 	xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
 	/* gc */
 	dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
-	
+
 	/* event mask */
 	XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask
 		| StructureNotifyMask | FocusChangeMask | PointerMotionMask