2000-06-19 04:22:15 +00:00
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/**************************************************************************
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* move.c *
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* *
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* Copyright (C) 1999 Chris Allegretta *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 1, or (at your option) *
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* any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software *
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
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* *
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**************************************************************************/
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include "config.h"
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#include "proto.h"
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#include "nano.h"
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2000-06-21 03:00:43 +00:00
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2000-06-19 04:22:15 +00:00
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#ifndef NANO_SMALL
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#include <libintl.h>
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#define _(string) gettext(string)
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#else
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#define _(string) (string)
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#endif
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void page_down_center(void)
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{
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2000-07-05 03:08:28 +00:00
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if (editbot != filebot) {
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2000-07-29 04:33:38 +00:00
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edit_update(editbot->next, CENTER);
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2000-06-19 04:22:15 +00:00
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center_cursor();
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} else {
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while (current != filebot)
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current = current->next;
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2000-07-29 04:33:38 +00:00
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edit_update(current, CENTER);
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2000-06-19 04:22:15 +00:00
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}
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update_cursor();
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}
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int page_down(void)
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{
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wrap_reset();
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current_x = 0;
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placewewant = 0;
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if (current == filebot)
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return 0;
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2000-07-29 04:33:38 +00:00
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if (editbot != filebot || edittop == fileage) {
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2000-06-19 04:22:15 +00:00
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current_y = 0;
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2000-07-29 04:33:38 +00:00
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current = editbot;
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if (current->prev != NULL)
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current = current->prev;
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if (current->prev != NULL)
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current = current->prev;
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edit_update(current, TOP);
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} else {
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2000-06-19 04:22:15 +00:00
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while (current != filebot) {
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current = current->next;
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current_y++;
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}
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2000-07-29 04:33:38 +00:00
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edit_update(edittop, TOP);
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}
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2000-06-19 04:22:15 +00:00
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update_cursor();
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UNSET(KEEP_CUTBUFFER);
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check_statblank();
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return 1;
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}
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int do_home(void)
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{
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current_x = 0;
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placewewant = 0;
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update_line(current, current_x);
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return 1;
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}
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int do_end(void)
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{
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current_x = strlen(current->data);
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placewewant = xplustabs();
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update_line(current, current_x);
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return 1;
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}
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/* What happens when we want to go past the bottom of the buffer */
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int do_down(void)
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{
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wrap_reset();
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if (current->next != NULL) {
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update_line(current->prev, 0);
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if (placewewant > 0)
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current_x = actual_x(current->next, placewewant);
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if (current_x > strlen(current->next->data))
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current_x = strlen(current->next->data);
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} else {
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UNSET(KEEP_CUTBUFFER);
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check_statblank();
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return 0;
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}
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2000-06-21 03:00:43 +00:00
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if (current_y < editwinrows - 1 && current != editbot)
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2000-06-19 04:22:15 +00:00
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current_y++;
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else
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page_down_center();
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update_cursor();
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update_line(current->prev, 0);
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update_line(current, current_x);
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UNSET(KEEP_CUTBUFFER);
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check_statblank();
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return 1;
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}
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void page_up_center(void)
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{
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if (edittop != fileage) {
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2000-07-29 04:33:38 +00:00
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edit_update(edittop, CENTER);
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2000-06-19 04:22:15 +00:00
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center_cursor();
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} else
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current_y = 0;
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update_cursor();
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}
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2000-07-03 04:24:39 +00:00
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int page_up(void)
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{
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2000-07-29 04:33:38 +00:00
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filestruct *fileptr = edittop;
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2000-07-03 04:24:39 +00:00
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wrap_reset();
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current_x = 0;
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placewewant = 0;
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if (current == fileage)
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return 0;
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current_y = 0;
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2000-07-29 04:33:38 +00:00
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if (fileptr->next != NULL)
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fileptr = fileptr->next;
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if (fileptr->next != NULL)
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fileptr = fileptr->next;
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current = edittop;
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edit_update(fileptr, BOTTOM);
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2000-07-03 04:24:39 +00:00
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update_cursor();
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UNSET(KEEP_CUTBUFFER);
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check_statblank();
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return 1;
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}
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2000-06-19 04:22:15 +00:00
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int do_up(void)
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{
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wrap_reset();
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if (current->prev != NULL) {
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update_line(current, 0);
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if (placewewant > 0)
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current_x = actual_x(current->prev, placewewant);
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if (current_x > strlen(current->prev->data))
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current_x = strlen(current->prev->data);
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}
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if (current_y > 0)
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current_y--;
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else
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page_up_center();
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update_cursor();
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update_line(current->next, 0);
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update_line(current, current_x);
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UNSET(KEEP_CUTBUFFER);
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check_statblank();
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return 1;
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}
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int do_right(void)
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{
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if (current_x < strlen(current->data)) {
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current_x++;
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} else {
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if (do_down())
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current_x = 0;
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}
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placewewant = xplustabs();
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update_cursor();
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update_line(current, current_x);
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UNSET(KEEP_CUTBUFFER);
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check_statblank();
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return 1;
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}
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int do_left(void)
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{
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if (current_x > 0)
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current_x--;
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else if (current != fileage) {
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placewewant = 0;
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current_x = strlen(current->prev->data);
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do_up();
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}
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placewewant = xplustabs();
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update_cursor();
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update_line(current, current_x);
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UNSET(KEEP_CUTBUFFER);
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check_statblank();
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return 1;
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}
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