| /* $Id$ */ |
| /************************************************************************** |
| * move.c * |
| * * |
| * Copyright (C) 1999 Chris Allegretta * |
| * This program is free software; you can redistribute it and/or modify * |
| * it under the terms of the GNU General Public License as published by * |
| * the Free Software Foundation; either version 1, or (at your option) * |
| * any later version. * |
| * * |
| * This program is distributed in the hope that it will be useful, * |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
| * GNU General Public License for more details. * |
| * * |
| * You should have received a copy of the GNU General Public License * |
| * along with this program; if not, write to the Free Software * |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * |
| * * |
| **************************************************************************/ |
| |
| #include <stdlib.h> |
| #include <string.h> |
| #include <stdio.h> |
| #include "config.h" |
| #include "proto.h" |
| #include "nano.h" |
| |
| #ifndef NANO_SMALL |
| #include <libintl.h> |
| #define _(string) gettext(string) |
| #else |
| #define _(string) (string) |
| #endif |
| |
| void page_down_center(void) |
| { |
| if (editbot != filebot) { |
| edit_update(editbot->next, CENTER); |
| center_cursor(); |
| } else { |
| while (current != filebot) |
| current = current->next; |
| edit_update(current, CENTER); |
| } |
| update_cursor(); |
| } |
| |
| int page_down(void) |
| { |
| wrap_reset(); |
| current_x = 0; |
| placewewant = 0; |
| |
| if (current == filebot) |
| return 0; |
| |
| if (editbot != filebot || edittop == fileage) { |
| current_y = 0; |
| current = editbot; |
| |
| if (current->prev != NULL) |
| current = current->prev; |
| if (current->prev != NULL) |
| current = current->prev; |
| edit_update(current, TOP); |
| } else { |
| while (current != filebot) { |
| current = current->next; |
| current_y++; |
| } |
| edit_update(edittop, TOP); |
| } |
| |
| update_cursor(); |
| UNSET(KEEP_CUTBUFFER); |
| check_statblank(); |
| return 1; |
| } |
| |
| int do_home(void) |
| { |
| current_x = 0; |
| placewewant = 0; |
| update_line(current, current_x); |
| return 1; |
| } |
| |
| int do_end(void) |
| { |
| current_x = strlen(current->data); |
| placewewant = xplustabs(); |
| update_line(current, current_x); |
| |
| return 1; |
| } |
| |
| /* What happens when we want to go past the bottom of the buffer */ |
| int do_down(void) |
| { |
| wrap_reset(); |
| if (current->next != NULL) { |
| update_line(current->prev, 0); |
| |
| if (placewewant > 0) |
| current_x = actual_x(current->next, placewewant); |
| |
| if (current_x > strlen(current->next->data)) |
| current_x = strlen(current->next->data); |
| } else { |
| UNSET(KEEP_CUTBUFFER); |
| check_statblank(); |
| return 0; |
| } |
| |
| if (current_y < editwinrows - 1 && current != editbot) |
| current_y++; |
| else |
| page_down_center(); |
| |
| update_cursor(); |
| update_line(current->prev, 0); |
| update_line(current, current_x); |
| UNSET(KEEP_CUTBUFFER); |
| check_statblank(); |
| return 1; |
| } |
| |
| void page_up_center(void) |
| { |
| if (edittop != fileage) { |
| edit_update(edittop, CENTER); |
| center_cursor(); |
| } else |
| current_y = 0; |
| |
| update_cursor(); |
| |
| } |
| |
| int page_up(void) |
| { |
| filestruct *fileptr = edittop; |
| wrap_reset(); |
| current_x = 0; |
| placewewant = 0; |
| |
| if (current == fileage) |
| return 0; |
| |
| current_y = 0; |
| if (fileptr->next != NULL) |
| fileptr = fileptr->next; |
| if (fileptr->next != NULL) |
| fileptr = fileptr->next; |
| |
| current = edittop; |
| edit_update(fileptr, BOTTOM); |
| update_cursor(); |
| |
| UNSET(KEEP_CUTBUFFER); |
| check_statblank(); |
| return 1; |
| } |
| |
| |
| int do_up(void) |
| { |
| wrap_reset(); |
| if (current->prev != NULL) { |
| update_line(current, 0); |
| |
| if (placewewant > 0) |
| current_x = actual_x(current->prev, placewewant); |
| |
| if (current_x > strlen(current->prev->data)) |
| current_x = strlen(current->prev->data); |
| } |
| if (current_y > 0) |
| current_y--; |
| else |
| page_up_center(); |
| |
| update_cursor(); |
| update_line(current->next, 0); |
| update_line(current, current_x); |
| UNSET(KEEP_CUTBUFFER); |
| check_statblank(); |
| return 1; |
| } |
| |
| int do_right(void) |
| { |
| if (current_x < strlen(current->data)) { |
| current_x++; |
| } else { |
| if (do_down()) |
| current_x = 0; |
| } |
| |
| placewewant = xplustabs(); |
| update_cursor(); |
| update_line(current, current_x); |
| UNSET(KEEP_CUTBUFFER); |
| check_statblank(); |
| return 1; |
| } |
| |
| int do_left(void) |
| { |
| if (current_x > 0) |
| current_x--; |
| else if (current != fileage) { |
| placewewant = 0; |
| current_x = strlen(current->prev->data); |
| do_up(); |
| } |
| placewewant = xplustabs(); |
| |
| update_cursor(); |
| update_line(current, current_x); |
| UNSET(KEEP_CUTBUFFER); |
| check_statblank(); |
| return 1; |
| } |