cleaned some spaces.

[st.git] / st.c

diff --git a/st.c b/st.c
index e288902..9667dbd 100644 (file)
--- a/st.c
+++ b/st.c
@@ -34,6 +34,7 @@
 #define BETWEEN(x, a, b)  ((a) <= (x) && (x) <= (b))
 #define LIMIT(x, a, b)    (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
+#define IS_SET(flag) (term.mode & flag)
 
 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
@@ -128,7 +129,7 @@ static void csireset(void);
 
 static void tclearregion(int, int, int, int);
 static void tcursor(int);
-static void tmovecursor(int);
+static void twrapcursor(void);
 static void tdeletechar(int);
 static void tdeleteline(int);
 static void tinsertblank(int);
@@ -437,29 +438,13 @@ tmoveto(int x, int y) {
 }
 
 void
-tmovecursor(int dir) {
-       int xf = term.c.x, yf = term.c.y;
-       
-       switch(dir) {
-       case CURSOR_UP:
-               yf--;
-               break;
-       case CURSOR_DOWN:
-               yf++;
-               break;
-       case CURSOR_LEFT:
-               xf--;
-               break;
-       case CURSOR_RIGHT:
-               xf++;
-               if(term.mode & MODE_WRAP && xf >= term.col) {
-                       xf = 0, yf++;
-                       if(yf > term.bot)
-                               yf = term.bot, tscroll();
-               }
-               break;
-       }
-       tmoveto(xf, yf);
+twrapcursor(void) {
+       int y = term.c.y+1;
+       if(y > term.bot) {
+               tmoveto(0, term.bot);
+               tscroll();
+       } else 
+               tmoveto(0, y);
 }
        
 void
@@ -969,7 +954,7 @@ tputc(char c) {
                        tputtab();
                        break;
                case '\b':
-                       tmovecursor(CURSOR_LEFT);
+                       tmoveto(term.c.x-1, term.c.y);
                        break;
                case '\r':
                        tmoveto(0, term.c.y);
@@ -986,7 +971,10 @@ tputc(char c) {
                        break;
                default:
                        tsetchar(c);
-                       tmovecursor(CURSOR_RIGHT);
+                       if(term.c.x+1 < term.col) {
+                               tmoveto(term.c.x+1, term.c.y);
+                       } else if(IS_SET(MODE_WRAP))
+                               twrapcursor();
                        break;
                }
        }
@@ -1001,23 +989,21 @@ tputs(char *s, int len) {
 void
 tresize(int col, int row) {
        int i;
-       Line *line;
        int minrow = MIN(row, term.row);
        int mincol = MIN(col, term.col);
 
        if(col < 1 || row < 1)
                return;
-       /* alloc */
-       line = calloc(row, sizeof(Line));
-       for(i = 0 ; i < row; i++)
-               line[i] = calloc(col, sizeof(Glyph));
-       /* copy */
-       for(i = 0 ; i < minrow; i++)
-               memcpy(line[i], term.line[i], mincol * sizeof(Glyph));
-       /* free */
-       for(i = 0; i < term.row; i++)
+
+       for(i = row; i < term.row; i++)
                free(term.line[i]);
-       free(term.line);
+       term.line = realloc(term.line, row * sizeof(Line));
+       for(i = 0; i < minrow; i++) {
+               term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
+               memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
+       }
+       for(/* i == minrow */; i < row; i++)
+               term.line[i] = calloc(col, sizeof(Glyph));
        
        LIMIT(term.c.x, 0, col-1);
        LIMIT(term.c.y, 0, row-1);
@@ -1025,7 +1011,6 @@ tresize(int col, int row) {
        LIMIT(term.bot, 0, row-1);
        
        term.bot = row-1;
-       term.line = line;
        term.col = col, term.row = row;
 }
 
@@ -1285,7 +1270,7 @@ kpress(XEvent *ev) {
                case XK_Down:
                case XK_Left:
                case XK_Right:
-                       sprintf(buf, "\033%c%c", term.mode & MODE_APPKEYPAD ? 'O' : '[', "DACB"[ksym - XK_Left]);
+                       sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
                        ttywrite(buf, 3);
                        break;
                case XK_Insert: