Fusing two identical functions into one: need_screen_update().

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@5207 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -1,3 +1,7 @@
+2015-04-20  Benno Schulenberg  <bensberg@justemail.net>
+	* src/winio.c (need_horizontal_update, need_vertical_update): Fuse
+	two identical functions into one: need_screen_update().
+
 2015-04-18  Benno Schulenberg  <bensberg@justemail.net>
 	* src/global.c, src/nano.c, doc/man/nanorc.5, doc/texinfo/nano.texi:
 	Make the descriptions of the multibuffer feature more accurate.

src/move.c

@@ -471,7 +471,7 @@ void do_home(void)
     }
 #endif
 
-    if (need_horizontal_update(pww_save))
+    if (need_screen_update(pww_save))
 	update_line(openfile->current, openfile->current_x);
 }
 
@@ -483,7 +483,7 @@ void do_end(void)
     openfile->current_x = strlen(openfile->current->data);
     openfile->placewewant = xplustabs();
 
-    if (need_horizontal_update(pww_save))
+    if (need_screen_update(pww_save))
 	update_line(openfile->current, openfile->current_x);
 }
 
@@ -534,7 +534,7 @@ void do_up(
      * needs to be redrawn if we're not on the first page, and the
      * latter needs to be drawn unconditionally. */
     if (openfile->current_y > 0) {
-	if (need_vertical_update(0))
+	if (need_screen_update(0))
 	    update_line(openfile->current->next, 0);
 	update_line(openfile->current, openfile->current_x);
     }
@@ -632,7 +632,7 @@ void do_down(
 	|| ISSET(SOFTWRAP)
 #endif
 	) {
-	if (need_vertical_update(0))
+	if (need_screen_update(0))
 	    update_line(openfile->current->prev, 0);
 	update_line(openfile->current, openfile->current_x);
     }
@@ -671,7 +671,7 @@ void do_left(void)
 
     openfile->placewewant = xplustabs();
 
-    if (need_horizontal_update(pww_save))
+    if (need_screen_update(pww_save))
 	update_line(openfile->current, openfile->current_x);
 }
 
@@ -692,6 +692,6 @@ void do_right(void)
 
     openfile->placewewant = xplustabs();
 
-    if (need_horizontal_update(pww_save))
+    if (need_screen_update(pww_save))
 	update_line(openfile->current, openfile->current_x);
 }

src/proto.h

@@ -789,8 +789,7 @@ void reset_cursor(void);
 void edit_draw(filestruct *fileptr, const char *converted, int
 	line, size_t start);
 int update_line(filestruct *fileptr, size_t index);
-bool need_horizontal_update(size_t pww_save);
-bool need_vertical_update(size_t pww_save);
+bool need_screen_update(size_t pww_save);
 void edit_scroll(scroll_dir direction, ssize_t nlines);
 void edit_redraw(filestruct *old_current, size_t pww_save);
 void edit_refresh(void);

src/winio.c

@@ -2949,23 +2949,10 @@ int update_line(filestruct *fileptr, size_t index)
     return extralinesused;
 }
 
-/* Return TRUE if we need an update after moving horizontally, and FALSE
- * otherwise.  We need one if the mark is on or if pww_save and
- * placewewant are on different pages. */
-bool need_horizontal_update(size_t pww_save)
-{
-    return
-#ifndef NANO_TINY
-	openfile->mark_set ||
-#endif
-	get_page_start(pww_save) !=
-	get_page_start(openfile->placewewant);
-}
-
-/* Return TRUE if we need an update after moving vertically, and FALSE
- * otherwise.  We need one if the mark is on or if pww_save and
- * placewewant are on different pages. */
-bool need_vertical_update(size_t pww_save)
+/* Return TRUE if we need an update after moving the cursor, and
+ * FALSE otherwise.  We need an update if the mark is on, or if
+ * pww_save and placewewant are on different pages. */
+bool need_screen_update(size_t pww_save)
 {
     return
 #ifndef NANO_TINY
@@ -3012,15 +2999,12 @@ void edit_scroll(scroll_dir direction, ssize_t nlines)
 {
     ssize_t i;
     filestruct *foo;
-    bool do_redraw = FALSE;
+    bool do_redraw = need_screen_update(0);
 
     /* Don't bother scrolling less than one line. */
     if (nlines < 1)
 	return;
 
-    if (need_vertical_update(0))
-	do_redraw = TRUE;
-
     /* Part 1: nlines is the number of lines we're going to scroll the
      * text of the edit window. */
 
@@ -3122,9 +3106,8 @@ void edit_scroll(scroll_dir direction, ssize_t nlines)
  * updated.  Use this if we've moved without changing any text. */
 void edit_redraw(filestruct *old_current, size_t pww_save)
 {
-    bool do_redraw = need_vertical_update(0) ||
-	need_vertical_update(pww_save);
     filestruct *foo = NULL;
+    bool do_redraw = need_screen_update(0) || need_screen_update(pww_save);
 
     /* If either old_current or current is offscreen, scroll the edit
      * window until it's onscreen and get out. */