tweaks: rename a function to better describe what it does

It does not update anything -- it just picks a new point from
where to start displaying the buffer.  All actual updating of
the screen is done by edit_refresh() and edit_redraw() and such.

src/move.c

@@ -99,7 +99,7 @@ void do_page_up(void)
 #endif
 
     /* Scroll the edit window up a page. */
-    edit_update(STATIONARY);
+    adjust_viewport(STATIONARY);
     refresh_needed = TRUE;
 }
 
@@ -139,7 +139,7 @@ void do_page_down(void)
 					openfile->placewewant);
 
     /* Scroll the edit window down a page. */
-    edit_update(STATIONARY);
+    adjust_viewport(STATIONARY);
     refresh_needed = TRUE;
 }
 
@@ -369,7 +369,7 @@ void ensure_line_is_visible(void)
 #ifndef NANO_TINY
     if (ISSET(SOFTWRAP) && strlenpt(openfile->current->data) / editwincols +
 				openfile->current_y >= editwinrows) {
-	edit_update(ISSET(SMOOTH_SCROLL) ? FLOWING : CENTERING);
+	adjust_viewport(ISSET(SMOOTH_SCROLL) ? FLOWING : CENTERING);
 	refresh_needed = TRUE;
     }
 #endif

src/nano.c

@@ -395,7 +395,7 @@ void move_to_filestruct(filestruct **file_top, filestruct **file_bot,
     /* If the top of the edit window was inside the old partition, put
      * it in range of current. */
     if (edittop_inside) {
-	edit_update(STATIONARY);
+	adjust_viewport(STATIONARY);
 	refresh_needed = TRUE;
     }
 

src/proto.h

@@ -781,7 +781,7 @@ bool need_horizontal_scroll(const size_t old_column, const size_t new_column);
 void edit_scroll(scroll_dir direction, ssize_t nlines);
 void edit_redraw(filestruct *old_current);
 void edit_refresh(void);
-void edit_update(update_type location);
+void adjust_viewport(update_type location);
 void total_redraw(void);
 void total_refresh(void);
 void display_main_list(void);

src/search.c

@@ -943,8 +943,8 @@ void do_gotolinecolumn(ssize_t line, ssize_t column, bool use_answer,
 
     /* When the position was manually given, center the target line. */
     if (interactive || ISSET(SOFTWRAP)) {
-	edit_update(CENTERING);
-	edit_refresh();
+	adjust_viewport(CENTERING);
+	refresh_needed = TRUE;
     } else {
 	/* If the target line is close to the tail of the file, put the last
 	 * line of the file on the bottom line of the screen; otherwise, just
@@ -953,9 +953,9 @@ void do_gotolinecolumn(ssize_t line, ssize_t column, bool use_answer,
 							editwinrows / 2) {
 	    openfile->current_y = editwinrows - openfile->filebot->lineno +
 					openfile->current->lineno - 1;
-	    edit_update(STATIONARY);
+	    adjust_viewport(STATIONARY);
 	} else
-	    edit_update(CENTERING);
+	    adjust_viewport(CENTERING);
     }
 }
 

src/text.c

@@ -3076,7 +3076,7 @@ const char *do_alt_speller(char *tempfile_name)
     goto_line_posx(lineno_save, current_x_save);
     openfile->current_y = current_y_save;
     openfile->placewewant = pww_save;
-    edit_update(STATIONARY);
+    adjust_viewport(STATIONARY);
 
     /* Stat the temporary file again, and mark the buffer as modified only
      * if this file was changed since it was written. */
@@ -3552,7 +3552,7 @@ void do_formatter(void)
 	goto_line_posx(lineno_save, current_x_save);
 	openfile->current_y = current_y_save;
 	openfile->placewewant = pww_save;
-	edit_update(STATIONARY);
+	adjust_viewport(STATIONARY);
 
 	set_modified();
 

src/winio.c

@@ -2899,7 +2899,7 @@ void edit_redraw(filestruct *old_current)
 		ISSET(SOFTWRAP) && strlenpt(openfile->current->data) >= editwincols) ||
 #endif
 		openfile->current->lineno < openfile->edittop->lineno) {
-	edit_update((focusing || !ISSET(SMOOTH_SCROLL)) ? CENTERING : FLOWING);
+	adjust_viewport((focusing || !ISSET(SMOOTH_SCROLL)) ? CENTERING : FLOWING);
 	refresh_needed = TRUE;
     }
 
@@ -2948,7 +2948,7 @@ void edit_refresh(void)
 #endif
 
 	/* Make sure the current line is on the screen. */
-	edit_update((focusing || !ISSET(SMOOTH_SCROLL)) ? CENTERING : STATIONARY);
+	adjust_viewport((focusing || !ISSET(SMOOTH_SCROLL)) ? CENTERING : STATIONARY);
     }
 
     foo = openfile->edittop;
@@ -2978,7 +2978,7 @@ void edit_refresh(void)
  * middle of the screen, STATIONARY means that it should stay at the
  * same vertical position, and FLOWING means that it should scroll no
  * more than needed to bring current into view. */
-void edit_update(update_type manner)
+void adjust_viewport(update_type manner)
 {
     int goal = 0;
 
@@ -3023,7 +3023,7 @@ void edit_update(update_type manner)
 #endif
     }
 #ifdef DEBUG
-    fprintf(stderr, "edit_update(): setting edittop to lineno %ld\n", (long)openfile->edittop->lineno);
+    fprintf(stderr, "adjust_viewport(): setting edittop to lineno %ld\n", (long)openfile->edittop->lineno);
 #endif
     compute_maxrows();
 }