copy old pixmap to new on resize

[st.git] / st.c

diff --git a/st.c b/st.c
index 4f17752..734ad0a 100644 (file)
--- a/st.c
+++ b/st.c
@@ -55,7 +55,8 @@ enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
        CURSOR_SAVE, CURSOR_LOAD };
 enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
-enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8 };
+enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8, 
+       MODE_CRLF=16 };
 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
 enum { SCREEN_UPDATE, SCREEN_REDRAW };
 enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 };
@@ -164,7 +165,7 @@ static void tinsertblank(int);
 static void tinsertblankline(int);
 static void tmoveto(int, int);
 static void tnew(int, int);
-static void tnewline(void);
+static void tnewline(int);
 static void tputtab(void);
 static void tputc(char);
 static void tputs(char*, int);
@@ -189,6 +190,7 @@ static void xdrawcursor(void);
 static void xinit(void);
 static void xloadcols(void);
 static void xseturgency(int);
+static void xresize(int, int);
 
 static void expose(XEvent *);
 static void visibility(XEvent *);
@@ -626,14 +628,13 @@ tscrollup(int orig, int n) {
 }
 
 void
-tnewline(void) {
-       int x = term.c.x+1 < term.col ? term.c.x : 0;
+tnewline(int first_col) {
        int y = term.c.y;
-       if(term.c.y == term.bot)
+       if(y == term.bot)
                tscrollup(term.top, 1);
        else
                y++;
-       tmoveto(x, y);
+       tmoveto(first_col ? 0 : term.c.x, y);
 }
 
 void
@@ -932,6 +933,9 @@ csihandle(void) {
                                break;
                        case 12: /* att610 -- Stop blinking cursor (IGNORED) */
                                break;
+                       case 20:
+                               term.mode &= ~MODE_CRLF;
+                               break;
                        case 25:
                                term.c.state |= CURSOR_HIDE;
                                break;
@@ -988,6 +992,9 @@ csihandle(void) {
                        case 7:
                                term.mode |= MODE_WRAP;
                                break;
+                       case 20:
+                               term.mode |= MODE_CRLF;
+                               break;
                        case 12: /* att610 -- Start blinking cursor (IGNORED) */
                                 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
                                if(escseq.narg > 1 && escseq.arg[1] != 25)
@@ -1116,7 +1123,7 @@ tputc(char c) {
                                term.esc = 0;
                                break;
                        case 'E': /* NEL -- Next line */
-                               tnewline();
+                               tnewline(1); /* always go to first col */
                                term.esc = 0;
                                break;
                        case 'M': /* RI -- Reverse index */
@@ -1162,8 +1169,11 @@ tputc(char c) {
                case '\r':
                        tmoveto(0, term.c.y);
                        break;
+               case '\f':
+               case '\v':
                case '\n':
-                       tnewline();
+                       /* go to first col if the mode is set */
+                       tnewline(IS_SET(MODE_CRLF));
                        break;
                case '\a':
                        if(!(xw.state & WIN_FOCUSED))
@@ -1175,7 +1185,7 @@ tputc(char c) {
                        break;
                default:
                        if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
-                               tnewline();
+                               tnewline(1); /* always go to first col */
                        tsetchar(c);
                        if(term.c.x+1 < term.col)
                                tmoveto(term.c.x+1, term.c.y);
@@ -1249,6 +1259,28 @@ tresize(int col, int row) {
 }
 
 void
+xresize(int col, int row) {
+       Pixmap newbuf;
+       int oldw, oldh;
+
+       oldw = xw.bufw;
+       oldh = xw.bufh;
+       xw.bufw = MAX(1, col * xw.cw);
+       xw.bufh = MAX(1, row * xw.ch);
+       newbuf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
+       XCopyArea(xw.dis, xw.buf, newbuf, dc.gc, 0, 0, xw.bufw, xw.bufh, 0, 0);
+       XFreePixmap(xw.dis, xw.buf);
+       XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
+       if(xw.bufw > oldw)
+               XFillRectangle(xw.dis, newbuf, dc.gc, oldw, 0,
+                               xw.bufw-oldw, MIN(xw.bufh, oldh));
+       if(xw.bufh > oldh)
+               XFillRectangle(xw.dis, newbuf, dc.gc, 0, oldh,
+                               xw.bufw, xw.bufh-oldh);
+       xw.buf = newbuf;
+}
+
+void
 xloadcols(void) {
        int i, r, g, b;
        XColor color;
@@ -1560,15 +1592,12 @@ kpress(XEvent *ev) {
        meta = e->state & Mod1Mask;
        shift = e->state & ShiftMask;
        len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
-
+       
+       /* 1. custom keys from config.h */
        if((customkey = kmap(ksym)))
                ttywrite(customkey, strlen(customkey));
-       else if(len > 0) {
-               buf[sizeof(buf)-1] = '\0';
-               if(meta && len == 1)
-                       ttywrite("\033", 1);
-               ttywrite(buf, len);
-       } else
+       /* 2. hardcoded (overrides X lookup) */
+       else
                switch(ksym) {
                case XK_Up:
                case XK_Down:
@@ -1581,8 +1610,21 @@ kpress(XEvent *ev) {
                        if(shift)
                                selpaste();
                        break;
+               case XK_Return:
+                       if(IS_SET(MODE_CRLF))
+                               ttywrite("\r\n", 2);
+                       else
+                               ttywrite("\r", 1);
+                       break;
+                       /* 3. X lookup  */
                default:
-                       fprintf(stderr, "errkey: %d\n", (int)ksym);
+                       if(len > 0) {
+                               buf[sizeof(buf)-1] = '\0';
+                               if(meta && len == 1)
+                                       ttywrite("\033", 1);
+                               ttywrite(buf, len);
+                       } else /* 4. nothing to send */
+                               fprintf(stderr, "errkey: %d\n", (int)ksym);
                        break;
                }
 }
@@ -1596,16 +1638,13 @@ resize(XEvent *e) {
        
        xw.w = e->xconfigure.width;
        xw.h = e->xconfigure.height;
-       xw.bufw = xw.w - 2*BORDER;
-       xw.bufh = xw.h - 2*BORDER;
-       col = xw.bufw / xw.cw;
-       row = xw.bufh / xw.ch;
+       col = (xw.w - 2*BORDER) / xw.cw;
+       row = (xw.h - 2*BORDER) / xw.ch;
+       if(col == term.col && row == term.row)
+               return;
        tresize(col, row);
        ttyresize(col, row);
-       xw.bufh = MAX(1, xw.bufh);
-       xw.bufw = MAX(1, xw.bufw);
-       XFreePixmap(xw.dis, xw.buf);
-       xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
+       xresize(col, row);
 }
 
 void