factor and cleanup code.

diff --git a/st.c b/st.c
index a5cca17..6abdc3f 100644 (file)
--- a/st.c
+++ b/st.c
@@ -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);
@@ -465,8 +465,7 @@ tscrolldown (int n) {
        
        LIMIT(n, 0, term.bot-term.top+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--) {
                temp = term.line[i];
@@ -481,8 +480,7 @@ tscrollup (int n) {
        Line temp;
        LIMIT(n, 0, term.bot-term.top+1);
        
-       for(i = 0; i < n; i++)
-               memset(term.line[term.top+i], 0, term.col*sizeof(Glyph));
+       tclearregion(0, term.top, term.col-1, term.top+n-1);
        
        for(i = term.top; i <= term.bot-n; i++) { 
                 temp = term.line[i];
@@ -957,7 +955,8 @@ 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;
@@ -1201,18 +1200,18 @@ 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