X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/04dcfaa26a29c02c57ef5af092396bd653df8293..fff61f253e7dcdcc2566579e213a0084356933db:/terminal.c

diff --git a/terminal.c b/terminal.c
index 69713680..5b8a1838 100644
--- a/terminal.c
+++ b/terminal.c
@@ -934,15 +934,18 @@ void term_out(void)
 {
     int c, inbuf_reap;
 
+    /*
+     * Optionally log the session traffic to a file. Useful for
+     * debugging and possibly also useful for actual logging.
+     */
+    if (cfg.logtype == LGTYP_DEBUG)
+	for (inbuf_reap = 0; inbuf_reap < inbuf_head; inbuf_reap++) {
+	    logtraffic((unsigned char) inbuf[inbuf_reap], LGTYP_DEBUG);
+	}
+
     for (inbuf_reap = 0; inbuf_reap < inbuf_head; inbuf_reap++) {
 	c = inbuf[inbuf_reap];
 
-	/*
-	 * Optionally log the session traffic to a file. Useful for
-	 * debugging and possibly also useful for actual logging.
-	 */
-	logtraffic((unsigned char) c, LGTYP_DEBUG);
-
 	/* Note only VT220+ are 8-bit VT102 is seven bit, it shouldn't even
 	 * be able to display 8-bit characters, but I'll let that go 'cause
 	 * of i18n.
@@ -985,9 +988,9 @@ void term_out(void)
 		  case 4:
 		  case 5:
 		    if ((c & 0xC0) != 0x80) {
-			inbuf_reap--;  /* This causes the faulting character */
-			c = UCSERR;    /* to be logged twice - not really a */
-			utf_state = 0; /* serious problem. */
+			inbuf_reap--;
+			c = UCSERR;
+			utf_state = 0;
 			break;
 		    }
 		    utf_char = (utf_char << 6) | (c & 0x3f);
@@ -1949,6 +1952,21 @@ void term_out(void)
 			    }
 			}
 			break;
+		      case 'Z':		/* BackTab for xterm */
+			compatibility(OTHER);
+			{
+			    int i = def(esc_args[0], 1);
+			    pos old_curs = curs;
+
+			    for(;i>0 && curs.x>0; i--) {
+				do {
+				    curs.x--;
+				} while (curs.x >0 && !tabs[curs.x]);
+			    }
+			    fix_cpos;
+			    check_selection(old_curs, curs);
+			}
+			break;
 		      case ANSI('L', '='):
 			compatibility(OTHER);
 			use_bce = (esc_args[0] <= 0);
@@ -3064,11 +3082,18 @@ void term_mouse(Mouse_Button b, Mouse_Action a, int x, int y,
 {
     pos selpoint;
     unsigned long *ldata;
+    int raw_mouse = xterm_mouse && !(cfg.mouse_override && shift);
 
-    if (y < 0)
+    if (y < 0) {
 	y = 0;
-    if (y >= rows)
+	if (a == MA_DRAG && !raw_mouse)
+	    term_scroll(0, -1);
+    }
+    if (y >= rows) {
 	y = rows - 1;
+	if (a == MA_DRAG && !raw_mouse)
+	    term_scroll(0, +1);
+    }
     if (x < 0) {
 	if (y > 0) {
 	    x = cols - 1;
@@ -3085,7 +3110,7 @@ void term_mouse(Mouse_Button b, Mouse_Action a, int x, int y,
     if ((ldata[cols] & LATTR_MODE) != LATTR_NORM)
 	selpoint.x /= 2;
 
-    if (xterm_mouse) {
+    if (raw_mouse) {
 	int encstate = 0, r, c;
 	char abuf[16];
 	static int is_down = 0;
@@ -3266,13 +3291,33 @@ int term_ldisc(int option)
 /*
  * from_backend(), to get data from the backend for the terminal.
  */
-void from_backend(int is_stderr, char *data, int len)
+int from_backend(int is_stderr, char *data, int len)
 {
     while (len--) {
 	if (inbuf_head >= INBUF_SIZE)
 	    term_out();
 	inbuf[inbuf_head++] = *data++;
     }
+
+    /*
+     * We process all stdout/stderr data immediately we receive it,
+     * and don't return until it's all gone. Therefore, there's no
+     * reason at all to return anything other than zero from this
+     * function.
+     * 
+     * This is a slightly suboptimal way to deal with SSH2 - in
+     * principle, the window mechanism would allow us to continue
+     * to accept data on forwarded ports and X connections even
+     * while the terminal processing was going slowly - but we
+     * can't do the 100% right thing without moving the terminal
+     * processing into a separate thread, and that might hurt
+     * portability. So we manage stdout buffering the old SSH1 way:
+     * if the terminal processing goes slowly, the whole SSH
+     * connection stops accepting data until it's ready.
+     * 
+     * In practice, I can't imagine this causing serious trouble.
+     */
+    return 0;
 }
 
 /*