fixed IL and DL.

1 files changed, 11 insertions, 19 deletions

diff --git a/st.c b/st.c
index 6abdc3f..65829a8 100644
--- a/st.c
+++ b/st.c
@@ -392,8 +392,10 @@ ttyread(void) {
 
         if((ret = read(cmdfd, buf, LEN(buf))) < 0)
                 die("Couldn't read from shell: %s\n", SERRNO);
-        else
+        else {
+                printf("ttyread %d\n", ret);
                 tputs(buf, ret);
+        }
 }
 
 void
@@ -589,21 +591,16 @@ tinsertblankline(int n) {
         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;
-        }
+
+        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;
-                /* blank it */
-                memset(blank, 0, term.col * sizeof(Glyph));
         }
 }
 
@@ -613,21 +610,16 @@ tdeleteline(int n) {
         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;
-        }
+
+        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;
-                /* blank it */
-                memset(blank, 0, term.col * sizeof(Glyph));
         }
 }