Munge comment associated w/ last change to describe intent; nfc.

[gnu-emacs] / src / xdisp.c

diff --git a/src/xdisp.c b/src/xdisp.c
index 807cbc2b7933891f20a813fcb2df4687011ebbe1..d7de7dbe8262baa8219cce6ea48a058371c3b923 100644 (file)
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -231,7 +231,7 @@ extern Lisp_Object Qhelp_echo;
 
 Lisp_Object Qoverriding_local_map, Qoverriding_terminal_local_map;
 Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions;
-Lisp_Object Qredisplay_end_trigger_functions;
+Lisp_Object Qredisplay_end_trigger_functions, Vredisplay_end_trigger_functions;
 Lisp_Object Qinhibit_point_motion_hooks;
 Lisp_Object QCeval, QCfile, QCdata, QCpropertize;
 Lisp_Object Qfontified;
@@ -10172,6 +10172,16 @@ redisplay_internal (preserve_echo_area)
   ++redisplaying_p;
   specbind (Qinhibit_free_realized_faces, Qnil);
 
+  {
+    Lisp_Object tail, frame;
+
+    FOR_EACH_FRAME (tail, frame)
+      {
+       struct frame *f = XFRAME (frame);
+       f->already_hscrolled_p = 0;
+      }
+  }
+
  retry:
   pause = 0;
   reconsider_clip_changes (w, current_buffer);
@@ -10606,8 +10616,12 @@ redisplay_internal (preserve_echo_area)
              if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f))
                {
                  /* See if we have to hscroll.  */
-                 if (hscroll_windows (f->root_window))
-                   goto retry;
+                 if (!f->already_hscrolled_p)
+                   {
+                     f->already_hscrolled_p = 1;
+                     if (hscroll_windows (f->root_window))
+                       goto retry;
+                   }
 
                  /* Prevent various kinds of signals during display
                     update.  stdio is not robust about handling
@@ -23122,6 +23136,12 @@ and its new display-start position.  Note that the value of `window-end'
 is not valid when these functions are called.  */);
   Vwindow_scroll_functions = Qnil;
 
+  DEFVAR_LISP ("redisplay-end-trigger-functions", &Vredisplay_end_trigger_functions,
+    doc: /* Functions called when redisplay of a window reaches the end trigger.
+Each function is called with two arguments, the window and the end trigger value.
+See `set-window-redisplay-end-trigger'.  */);
+  Vredisplay_end_trigger_functions = Qnil;
+
   DEFVAR_BOOL ("mouse-autoselect-window", &mouse_autoselect_window,
     doc: /* *Non-nil means autoselect window with mouse pointer.  */);
   mouse_autoselect_window = 0;