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2a3e3873a1
Level up WARNS
979 lines
25 KiB
C
979 lines
25 KiB
C
/*
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* $Id: textbox.c,v 1.110 2012/12/01 01:48:08 tom Exp $
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*
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* textbox.c -- implements the text box
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*
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* Copyright 2000-2011,2012 Thomas E. Dickey
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*
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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 Lesser General Public License, version 2.1
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program; if not, write to
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* Free Software Foundation, Inc.
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* 51 Franklin St., Fifth Floor
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* Boston, MA 02110, USA.
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*
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* An earlier version of this program lists as authors:
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* Savio Lam (lam836@cs.cuhk.hk)
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*/
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#include <dialog.h>
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#include <dlg_keys.h>
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#define PAGE_LENGTH (height - 4)
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#define PAGE_WIDTH (width - 2)
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typedef struct {
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DIALOG_CALLBACK obj;
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WINDOW *text;
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const char **buttons;
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int hscroll;
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char line[MAX_LEN + 1];
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int fd;
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long file_size;
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long fd_bytes_read;
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long bytes_read;
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long buffer_len;
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bool begin_reached;
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bool buffer_first;
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bool end_reached;
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long page_length; /* lines on the page which is shown */
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long in_buf; /* ending index into buf[] for page */
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char *buf;
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} MY_OBJ;
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static long
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lseek_obj(MY_OBJ * obj, long offset, int mode)
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{
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long fpos;
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if ((fpos = (long) lseek(obj->fd, (off_t) offset, mode)) == -1) {
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switch (mode) {
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default:
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case SEEK_CUR:
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dlg_exiterr("Cannot get file position");
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break;
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case SEEK_END:
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dlg_exiterr("Cannot seek to end of file");
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break;
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case SEEK_SET:
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dlg_exiterr("Cannot set file position to %ld", offset);
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break;
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}
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}
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return fpos;
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}
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static long
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ftell_obj(MY_OBJ * obj)
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{
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return lseek_obj(obj, 0L, SEEK_CUR);
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}
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static void
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lseek_set(MY_OBJ * obj, long offset)
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{
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long actual = lseek_obj(obj, offset, SEEK_SET);
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if (actual != offset) {
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dlg_exiterr("Cannot set file position to %ld (actual %ld)\n",
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offset, actual);
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}
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}
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static void
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lseek_end(MY_OBJ * obj, long offset)
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{
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long actual = lseek_obj(obj, offset, SEEK_END);
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if (actual > offset) {
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obj->file_size = actual;
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}
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}
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static void
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lseek_cur(MY_OBJ * obj, long offset)
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{
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long actual = lseek_obj(obj, offset, SEEK_CUR);
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if (actual != offset) {
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dlg_trace_msg("Lseek returned %ld, expected %ld\n", actual, offset);
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}
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}
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static char *
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xalloc(size_t size)
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{
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char *result = dlg_malloc(char, size);
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assert_ptr(result, "xalloc");
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return result;
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}
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/*
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* read_high() substitutes read() for tab->spaces conversion
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*
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* buffer_len, fd_bytes_read, bytes_read are modified
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* buf is allocated
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*
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* fd_bytes_read is the effective number of bytes read from file
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* bytes_read is the length of buf, that can be different if tab_correct
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*/
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static void
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read_high(MY_OBJ * obj, size_t size_read)
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{
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char *buftab, ch;
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int i = 0, j, n, tmpint;
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long begin_line;
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/* Allocate space for read buffer */
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buftab = xalloc(size_read + 1);
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if ((obj->fd_bytes_read = read(obj->fd, buftab, size_read)) != -1) {
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buftab[obj->fd_bytes_read] = '\0'; /* mark end of valid data */
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if (dialog_vars.tab_correct) {
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/* calculate bytes_read by buftab and fd_bytes_read */
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obj->bytes_read = begin_line = 0;
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for (j = 0; j < obj->fd_bytes_read; j++)
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if (buftab[j] == TAB)
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obj->bytes_read += dialog_state.tab_len
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- ((obj->bytes_read - begin_line)
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% dialog_state.tab_len);
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else if (buftab[j] == '\n') {
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obj->bytes_read++;
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begin_line = obj->bytes_read;
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} else
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obj->bytes_read++;
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if (obj->bytes_read > obj->buffer_len) {
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if (obj->buffer_first)
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obj->buffer_first = FALSE; /* disp = 0 */
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else {
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free(obj->buf);
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}
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obj->buffer_len = obj->bytes_read;
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/* Allocate space for read buffer */
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obj->buf = xalloc((size_t) obj->buffer_len + 1);
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}
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} else {
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if (obj->buffer_first) {
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obj->buffer_first = FALSE;
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/* Allocate space for read buffer */
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obj->buf = xalloc(size_read + 1);
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}
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obj->bytes_read = obj->fd_bytes_read;
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}
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j = 0;
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begin_line = 0;
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while (j < obj->fd_bytes_read)
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if (((ch = buftab[j++]) == TAB) && (dialog_vars.tab_correct != 0)) {
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tmpint = (dialog_state.tab_len
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- ((int) ((long) i - begin_line) % dialog_state.tab_len));
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for (n = 0; n < tmpint; n++)
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obj->buf[i++] = ' ';
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} else {
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if (ch == '\n')
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begin_line = i + 1;
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obj->buf[i++] = ch;
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}
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obj->buf[i] = '\0'; /* mark end of valid data */
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}
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if (obj->bytes_read == -1)
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dlg_exiterr("Error reading file");
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free(buftab);
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}
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static long
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find_first(MY_OBJ * obj, char *buffer, long length)
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{
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long recount = obj->page_length;
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long result = 0;
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while (length > 0) {
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if (buffer[length] == '\n') {
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if (--recount < 0) {
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result = length;
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break;
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}
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}
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--length;
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}
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return result;
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}
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static long
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tabize(MY_OBJ * obj, long val, long *first_pos)
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{
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long fpos;
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long i, count, begin_line;
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char *buftab;
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if (!dialog_vars.tab_correct)
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return val;
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fpos = ftell_obj(obj);
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lseek_set(obj, fpos - obj->fd_bytes_read);
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/* Allocate space for read buffer */
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buftab = xalloc((size_t) val + 1);
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if ((read(obj->fd, buftab, (size_t) val)) == -1)
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dlg_exiterr("Error reading file in tabize().");
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begin_line = count = 0;
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if (first_pos != 0)
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*first_pos = 0;
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for (i = 0; i < val; i++) {
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if ((first_pos != 0) && (count >= val)) {
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*first_pos = find_first(obj, buftab, i);
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break;
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}
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if (buftab[i] == TAB)
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count += dialog_state.tab_len
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- ((count - begin_line) % dialog_state.tab_len);
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else if (buftab[i] == '\n') {
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count++;
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begin_line = count;
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} else
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count++;
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}
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lseek_set(obj, fpos);
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free(buftab);
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return count;
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}
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/*
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* Return current line of text.
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* 'page' should point to start of current line before calling, and will be
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* updated to point to start of next line.
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*/
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static char *
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get_line(MY_OBJ * obj)
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{
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int i = 0;
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long fpos;
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obj->end_reached = FALSE;
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while (obj->buf[obj->in_buf] != '\n') {
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if (obj->buf[obj->in_buf] == '\0') { /* Either end of file or end of buffer reached */
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fpos = ftell_obj(obj);
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if (fpos < obj->file_size) { /* Not end of file yet */
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/* We've reached end of buffer, but not end of file yet, so
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* read next part of file into buffer
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*/
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read_high(obj, BUF_SIZE);
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obj->in_buf = 0;
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} else {
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if (!obj->end_reached)
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obj->end_reached = TRUE;
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break;
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}
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} else if (i < MAX_LEN)
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obj->line[i++] = obj->buf[obj->in_buf++];
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else {
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if (i == MAX_LEN) /* Truncate lines longer than MAX_LEN characters */
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obj->line[i++] = '\0';
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obj->in_buf++;
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}
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}
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if (i <= MAX_LEN)
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obj->line[i] = '\0';
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if (!obj->end_reached)
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obj->in_buf++; /* move past '\n' */
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return obj->line;
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}
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static bool
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match_string(MY_OBJ * obj, char *string)
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{
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char *match = get_line(obj);
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return strstr(match, string) != 0;
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}
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/*
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* Go back 'n' lines in text file. Called by dialog_textbox().
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* 'in_buf' will be updated to point to the desired line in 'buf'.
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*/
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static void
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back_lines(MY_OBJ * obj, long n)
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{
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int i;
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long fpos;
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long val_to_tabize;
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obj->begin_reached = FALSE;
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/* We have to distinguish between end_reached and !end_reached since at end
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* of file, the line is not ended by a '\n'. The code inside 'if'
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* basically does a '--in_buf' to move one character backward so as to
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* skip '\n' of the previous line */
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if (!obj->end_reached) {
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/* Either beginning of buffer or beginning of file reached? */
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if (obj->in_buf == 0) {
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fpos = ftell_obj(obj);
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if (fpos > obj->fd_bytes_read) { /* Not beginning of file yet */
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/* We've reached beginning of buffer, but not beginning of file
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* yet, so read previous part of file into buffer. Note that
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* we only move backward for BUF_SIZE/2 bytes, but not BUF_SIZE
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* bytes to avoid re-reading again in print_page() later
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*/
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/* Really possible to move backward BUF_SIZE/2 bytes? */
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if (fpos < BUF_SIZE / 2 + obj->fd_bytes_read) {
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/* No, move less than */
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lseek_set(obj, 0L);
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val_to_tabize = fpos - obj->fd_bytes_read;
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} else { /* Move backward BUF_SIZE/2 bytes */
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lseek_cur(obj, -(BUF_SIZE / 2 + obj->fd_bytes_read));
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val_to_tabize = BUF_SIZE / 2;
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}
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read_high(obj, BUF_SIZE);
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obj->in_buf = tabize(obj, val_to_tabize, (long *) 0);
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} else { /* Beginning of file reached */
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obj->begin_reached = TRUE;
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return;
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}
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}
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obj->in_buf--;
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if (obj->buf[obj->in_buf] != '\n')
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/* Something's wrong... */
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dlg_exiterr("Internal error in back_lines().");
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}
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/* Go back 'n' lines */
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for (i = 0; i < n; i++) {
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do {
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if (obj->in_buf == 0) {
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fpos = ftell_obj(obj);
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if (fpos > obj->fd_bytes_read) {
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/* Really possible to move backward BUF_SIZE/2 bytes? */
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if (fpos < BUF_SIZE / 2 + obj->fd_bytes_read) {
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/* No, move less than */
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lseek_set(obj, 0L);
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val_to_tabize = fpos - obj->fd_bytes_read;
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} else { /* Move backward BUF_SIZE/2 bytes */
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lseek_cur(obj, -(BUF_SIZE / 2 + obj->fd_bytes_read));
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val_to_tabize = BUF_SIZE / 2;
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}
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read_high(obj, BUF_SIZE);
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obj->in_buf = tabize(obj, val_to_tabize, (long *) 0);
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} else { /* Beginning of file reached */
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obj->begin_reached = TRUE;
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return;
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}
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}
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} while (obj->buf[--(obj->in_buf)] != '\n');
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}
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obj->in_buf++;
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}
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/*
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* Print a new line of text.
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*/
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static void
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print_line(MY_OBJ * obj, int row, int width)
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{
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if (wmove(obj->text, row, 0) != ERR) {
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int i, y, x;
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char *line = get_line(obj);
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const int *cols = dlg_index_columns(line);
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const int *indx = dlg_index_wchars(line);
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int limit = dlg_count_wchars(line);
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int first = 0;
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int last = limit;
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if (width > getmaxx(obj->text))
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width = getmaxx(obj->text);
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--width; /* for the leading ' ' */
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for (i = 0; i <= limit && cols[i] < obj->hscroll; ++i)
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first = i;
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for (i = first; (i <= limit) && ((cols[i] - cols[first]) < width); ++i)
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last = i;
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(void) waddch(obj->text, ' ');
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(void) waddnstr(obj->text, line + indx[first], indx[last] - indx[first]);
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getyx(obj->text, y, x);
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if (y == row) { /* Clear 'residue' of previous line */
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for (i = 0; i <= width - x; i++) {
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(void) waddch(obj->text, ' ');
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}
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}
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}
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}
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/*
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* Print a new page of text.
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*/
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static void
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print_page(MY_OBJ * obj, int height, int width)
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{
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int i, passed_end = 0;
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obj->page_length = 0;
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for (i = 0; i < height; i++) {
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print_line(obj, i, width);
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if (!passed_end)
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obj->page_length++;
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if (obj->end_reached && !passed_end)
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passed_end = 1;
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}
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(void) wnoutrefresh(obj->text);
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dlg_trace_win(obj->text);
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}
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/*
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* Print current position
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*/
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static void
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print_position(MY_OBJ * obj, WINDOW *win, int height, int width)
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{
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long fpos;
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long size;
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long first = -1;
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fpos = ftell_obj(obj);
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if (dialog_vars.tab_correct)
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size = tabize(obj, obj->in_buf, &first);
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else
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first = find_first(obj, obj->buf, size = obj->in_buf);
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dlg_draw_scrollbar(win,
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first,
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fpos - obj->fd_bytes_read + size,
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fpos - obj->fd_bytes_read + size,
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obj->file_size,
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0, PAGE_WIDTH,
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0, PAGE_LENGTH + 1,
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border_attr,
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border_attr);
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}
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/*
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* Display a dialog box and get the search term from user.
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*/
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static int
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get_search_term(WINDOW *dialog, char *input, int height, int width)
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{
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/* *INDENT-OFF* */
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static DLG_KEYS_BINDING binding[] = {
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INPUTSTR_BINDINGS,
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HELPKEY_BINDINGS,
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ENTERKEY_BINDINGS,
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END_KEYS_BINDING
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};
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/* *INDENT-ON* */
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int old_x, old_y;
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int box_x, box_y;
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int box_height, box_width;
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int offset = 0;
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int key = 0;
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int fkey = 0;
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bool first = TRUE;
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int result = DLG_EXIT_UNKNOWN;
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const char *caption = _("Search");
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int len_caption = dlg_count_columns(caption);
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const int *indx;
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int limit;
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WINDOW *widget;
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getbegyx(dialog, old_y, old_x);
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box_height = 1 + (2 * MARGIN);
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box_width = len_caption + (2 * (MARGIN + 2));
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box_width = MAX(box_width, 30);
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box_width = MIN(box_width, getmaxx(dialog) - 2 * MARGIN);
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len_caption = MIN(len_caption, box_width - (2 * (MARGIN + 1)));
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box_x = (width - box_width) / 2;
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box_y = (height - box_height) / 2;
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widget = dlg_new_modal_window(dialog,
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box_height, box_width,
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old_y + box_y, old_x + box_x);
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keypad(widget, TRUE);
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dlg_register_window(widget, "searchbox", binding);
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dlg_draw_box2(widget, 0, 0, box_height, box_width,
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searchbox_attr,
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searchbox_border_attr,
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searchbox_border2_attr);
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(void) wattrset(widget, searchbox_title_attr);
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(void) wmove(widget, 0, (box_width - len_caption) / 2);
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indx = dlg_index_wchars(caption);
|
|
limit = dlg_limit_columns(caption, len_caption, 0);
|
|
(void) waddnstr(widget, caption + indx[0], indx[limit] - indx[0]);
|
|
|
|
box_width -= 2;
|
|
offset = dlg_count_columns(input);
|
|
|
|
while (result == DLG_EXIT_UNKNOWN) {
|
|
if (!first) {
|
|
key = dlg_getc(widget, &fkey);
|
|
if (fkey) {
|
|
switch (fkey) {
|
|
#ifdef KEY_RESIZE
|
|
case KEY_RESIZE:
|
|
result = DLG_EXIT_CANCEL;
|
|
continue;
|
|
#endif
|
|
case DLGK_ENTER:
|
|
result = DLG_EXIT_OK;
|
|
continue;
|
|
}
|
|
} else if (key == ESC) {
|
|
result = DLG_EXIT_ESC;
|
|
continue;
|
|
} else if (key == ERR) {
|
|
napms(50);
|
|
continue;
|
|
}
|
|
}
|
|
if (dlg_edit_string(input, &offset, key, fkey, first)) {
|
|
dlg_show_string(widget, input, offset, searchbox_attr,
|
|
1, 1, box_width, FALSE, first);
|
|
first = FALSE;
|
|
}
|
|
}
|
|
dlg_del_window(widget);
|
|
return result;
|
|
}
|
|
|
|
static bool
|
|
perform_search(MY_OBJ * obj, int height, int width, int key, char *search_term)
|
|
{
|
|
int dir;
|
|
long tempinx;
|
|
long fpos;
|
|
int result;
|
|
bool found;
|
|
bool temp, temp1;
|
|
bool moved = FALSE;
|
|
|
|
/* set search direction */
|
|
dir = (key == '/' || key == 'n') ? 1 : 0;
|
|
if (dir ? !obj->end_reached : !obj->begin_reached) {
|
|
if (key == 'n' || key == 'N') {
|
|
if (search_term[0] == '\0') { /* No search term yet */
|
|
(void) beep();
|
|
return FALSE;
|
|
}
|
|
/* Get search term from user */
|
|
} else if ((result = get_search_term(obj->text, search_term,
|
|
PAGE_LENGTH,
|
|
PAGE_WIDTH)) != DLG_EXIT_OK
|
|
|| search_term[0] == '\0') {
|
|
#ifdef KEY_RESIZE
|
|
if (result == DLG_EXIT_CANCEL) {
|
|
ungetch(key);
|
|
ungetch(KEY_RESIZE);
|
|
/* FALLTHRU */
|
|
}
|
|
#endif
|
|
/* ESC pressed, or no search term, reprint page to clear box */
|
|
(void) wattrset(obj->text, dialog_attr);
|
|
back_lines(obj, obj->page_length);
|
|
return TRUE;
|
|
}
|
|
/* Save variables for restoring in case search term can't be found */
|
|
tempinx = obj->in_buf;
|
|
temp = obj->begin_reached;
|
|
temp1 = obj->end_reached;
|
|
fpos = ftell_obj(obj) - obj->fd_bytes_read;
|
|
/* update 'in_buf' to point to next (previous) line before
|
|
forward (backward) searching */
|
|
back_lines(obj, (dir
|
|
? obj->page_length - 1
|
|
: obj->page_length + 1));
|
|
if (dir) { /* Forward search */
|
|
while ((found = match_string(obj, search_term)) == FALSE) {
|
|
if (obj->end_reached)
|
|
break;
|
|
}
|
|
} else { /* Backward search */
|
|
while ((found = match_string(obj, search_term)) == FALSE) {
|
|
if (obj->begin_reached)
|
|
break;
|
|
back_lines(obj, 2L);
|
|
}
|
|
}
|
|
if (found == FALSE) { /* not found */
|
|
(void) beep();
|
|
/* Restore program state to that before searching */
|
|
lseek_set(obj, fpos);
|
|
|
|
read_high(obj, BUF_SIZE);
|
|
|
|
obj->in_buf = tempinx;
|
|
obj->begin_reached = temp;
|
|
obj->end_reached = temp1;
|
|
/* move 'in_buf' to point to start of current page to
|
|
* re-print current page. Note that 'in_buf' always points
|
|
* to start of next page, so this is necessary
|
|
*/
|
|
back_lines(obj, obj->page_length);
|
|
} else { /* Search term found */
|
|
back_lines(obj, 1L);
|
|
}
|
|
/* Reprint page */
|
|
(void) wattrset(obj->text, dialog_attr);
|
|
moved = TRUE;
|
|
} else { /* no need to find */
|
|
(void) beep();
|
|
}
|
|
return moved;
|
|
}
|
|
|
|
/*
|
|
* Display text from a file in a dialog box.
|
|
*/
|
|
int
|
|
dialog_textbox(const char *title, const char *file, int height, int width)
|
|
{
|
|
/* *INDENT-OFF* */
|
|
static DLG_KEYS_BINDING binding[] = {
|
|
HELPKEY_BINDINGS,
|
|
ENTERKEY_BINDINGS,
|
|
DLG_KEYS_DATA( DLGK_GRID_DOWN, 'J' ),
|
|
DLG_KEYS_DATA( DLGK_GRID_DOWN, 'j' ),
|
|
DLG_KEYS_DATA( DLGK_GRID_DOWN, KEY_DOWN ),
|
|
DLG_KEYS_DATA( DLGK_GRID_LEFT, 'H' ),
|
|
DLG_KEYS_DATA( DLGK_GRID_LEFT, 'h' ),
|
|
DLG_KEYS_DATA( DLGK_GRID_LEFT, KEY_LEFT ),
|
|
DLG_KEYS_DATA( DLGK_GRID_RIGHT, 'L' ),
|
|
DLG_KEYS_DATA( DLGK_GRID_RIGHT, 'l' ),
|
|
DLG_KEYS_DATA( DLGK_GRID_RIGHT, KEY_RIGHT ),
|
|
DLG_KEYS_DATA( DLGK_GRID_UP, 'K' ),
|
|
DLG_KEYS_DATA( DLGK_GRID_UP, 'k' ),
|
|
DLG_KEYS_DATA( DLGK_GRID_UP, KEY_UP ),
|
|
DLG_KEYS_DATA( DLGK_PAGE_FIRST, 'g' ),
|
|
DLG_KEYS_DATA( DLGK_PAGE_FIRST, KEY_HOME ),
|
|
DLG_KEYS_DATA( DLGK_PAGE_LAST, 'G' ),
|
|
DLG_KEYS_DATA( DLGK_PAGE_LAST, KEY_END ),
|
|
DLG_KEYS_DATA( DLGK_PAGE_LAST, KEY_LL ),
|
|
DLG_KEYS_DATA( DLGK_PAGE_NEXT, ' ' ),
|
|
DLG_KEYS_DATA( DLGK_PAGE_NEXT, KEY_NPAGE ),
|
|
DLG_KEYS_DATA( DLGK_PAGE_PREV, 'B' ),
|
|
DLG_KEYS_DATA( DLGK_PAGE_PREV, 'b' ),
|
|
DLG_KEYS_DATA( DLGK_PAGE_PREV, KEY_PPAGE ),
|
|
DLG_KEYS_DATA( DLGK_BEGIN, '0' ),
|
|
DLG_KEYS_DATA( DLGK_BEGIN, KEY_BEG ),
|
|
DLG_KEYS_DATA( DLGK_FIELD_NEXT, TAB ),
|
|
DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_BTAB ),
|
|
END_KEYS_BINDING
|
|
};
|
|
/* *INDENT-ON* */
|
|
|
|
#ifdef KEY_RESIZE
|
|
int old_height = height;
|
|
int old_width = width;
|
|
#endif
|
|
long fpos;
|
|
int x, y, cur_x, cur_y;
|
|
int key = 0, fkey;
|
|
int next = 0;
|
|
int i, code, passed_end;
|
|
char search_term[MAX_LEN + 1];
|
|
MY_OBJ obj;
|
|
WINDOW *dialog;
|
|
bool moved;
|
|
int result = DLG_EXIT_UNKNOWN;
|
|
int button = dlg_default_button();
|
|
int min_width = 12;
|
|
|
|
search_term[0] = '\0'; /* no search term entered yet */
|
|
|
|
memset(&obj, 0, sizeof(obj));
|
|
|
|
obj.begin_reached = TRUE;
|
|
obj.buffer_first = TRUE;
|
|
obj.end_reached = FALSE;
|
|
obj.buttons = dlg_exit_label();
|
|
|
|
/* Open input file for reading */
|
|
if ((obj.fd = open(file, O_RDONLY)) == -1)
|
|
dlg_exiterr("Can't open input file %s", file);
|
|
|
|
/* Get file size. Actually, 'file_size' is the real file size - 1,
|
|
since it's only the last byte offset from the beginning */
|
|
lseek_end(&obj, 0L);
|
|
|
|
/* Restore file pointer to beginning of file after getting file size */
|
|
lseek_set(&obj, 0L);
|
|
|
|
read_high(&obj, BUF_SIZE);
|
|
|
|
dlg_button_layout(obj.buttons, &min_width);
|
|
|
|
#ifdef KEY_RESIZE
|
|
retry:
|
|
#endif
|
|
moved = TRUE;
|
|
|
|
dlg_auto_sizefile(title, file, &height, &width, 2, min_width);
|
|
dlg_print_size(height, width);
|
|
dlg_ctl_size(height, width);
|
|
|
|
x = dlg_box_x_ordinate(width);
|
|
y = dlg_box_y_ordinate(height);
|
|
|
|
dialog = dlg_new_window(height, width, y, x);
|
|
dlg_register_window(dialog, "textbox", binding);
|
|
dlg_register_buttons(dialog, "textbox", obj.buttons);
|
|
|
|
dlg_mouse_setbase(x, y);
|
|
|
|
/* Create window for text region, used for scrolling text */
|
|
obj.text = dlg_sub_window(dialog, PAGE_LENGTH, PAGE_WIDTH, y + 1, x + 1);
|
|
|
|
/* register the new window, along with its borders */
|
|
dlg_mouse_mkbigregion(0, 0, PAGE_LENGTH + 2, width, KEY_MAX, 1, 1, 1 /* lines */ );
|
|
dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
|
|
dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
|
|
dlg_draw_title(dialog, title);
|
|
|
|
dlg_draw_buttons(dialog, PAGE_LENGTH + 2, 0, obj.buttons, button, FALSE, width);
|
|
(void) wnoutrefresh(dialog);
|
|
getyx(dialog, cur_y, cur_x); /* Save cursor position */
|
|
|
|
dlg_attr_clear(obj.text, PAGE_LENGTH, PAGE_WIDTH, dialog_attr);
|
|
|
|
while (result == DLG_EXIT_UNKNOWN) {
|
|
|
|
/*
|
|
* Update the screen according to whether we shifted up/down by a line
|
|
* or not.
|
|
*/
|
|
if (moved) {
|
|
if (next < 0) {
|
|
(void) scrollok(obj.text, TRUE);
|
|
(void) scroll(obj.text); /* Scroll text region up one line */
|
|
(void) scrollok(obj.text, FALSE);
|
|
print_line(&obj, PAGE_LENGTH - 1, PAGE_WIDTH);
|
|
(void) wnoutrefresh(obj.text);
|
|
} else if (next > 0) {
|
|
/*
|
|
* We don't call print_page() here but use scrolling to ensure
|
|
* faster screen update. However, 'end_reached' and
|
|
* 'page_length' should still be updated, and 'in_buf' should
|
|
* point to start of next page. This is done by calling
|
|
* get_line() in the following 'for' loop.
|
|
*/
|
|
(void) scrollok(obj.text, TRUE);
|
|
(void) wscrl(obj.text, -1); /* Scroll text region down one line */
|
|
(void) scrollok(obj.text, FALSE);
|
|
obj.page_length = 0;
|
|
passed_end = 0;
|
|
for (i = 0; i < PAGE_LENGTH; i++) {
|
|
if (!i) {
|
|
print_line(&obj, 0, PAGE_WIDTH); /* print first line of page */
|
|
(void) wnoutrefresh(obj.text);
|
|
} else
|
|
(void) get_line(&obj); /* Called to update 'end_reached' and 'in_buf' */
|
|
if (!passed_end)
|
|
obj.page_length++;
|
|
if (obj.end_reached && !passed_end)
|
|
passed_end = 1;
|
|
}
|
|
} else {
|
|
print_page(&obj, PAGE_LENGTH, PAGE_WIDTH);
|
|
}
|
|
print_position(&obj, dialog, height, width);
|
|
(void) wmove(dialog, cur_y, cur_x); /* Restore cursor position */
|
|
wrefresh(dialog);
|
|
}
|
|
moved = FALSE; /* assume we'll not move */
|
|
next = 0; /* ...but not scroll by a line */
|
|
|
|
key = dlg_mouse_wgetch(dialog, &fkey);
|
|
if (dlg_result_key(key, fkey, &result))
|
|
break;
|
|
|
|
if (!fkey && (code = dlg_char_to_button(key, obj.buttons)) >= 0) {
|
|
result = dlg_ok_buttoncode(code);
|
|
break;
|
|
}
|
|
|
|
if (fkey) {
|
|
switch (key) {
|
|
default:
|
|
if (is_DLGK_MOUSE(key)) {
|
|
result = dlg_exit_buttoncode(key - M_EVENT);
|
|
if (result < 0)
|
|
result = DLG_EXIT_OK;
|
|
} else {
|
|
beep();
|
|
}
|
|
break;
|
|
case DLGK_FIELD_NEXT:
|
|
button = dlg_next_button(obj.buttons, button);
|
|
if (button < 0)
|
|
button = 0;
|
|
dlg_draw_buttons(dialog,
|
|
height - 2, 0,
|
|
obj.buttons, button,
|
|
FALSE, width);
|
|
break;
|
|
case DLGK_FIELD_PREV:
|
|
button = dlg_prev_button(obj.buttons, button);
|
|
if (button < 0)
|
|
button = 0;
|
|
dlg_draw_buttons(dialog,
|
|
height - 2, 0,
|
|
obj.buttons, button,
|
|
FALSE, width);
|
|
break;
|
|
case DLGK_ENTER:
|
|
if (dialog_vars.nook)
|
|
result = DLG_EXIT_OK;
|
|
else
|
|
result = dlg_exit_buttoncode(button);
|
|
break;
|
|
case DLGK_PAGE_FIRST:
|
|
if (!obj.begin_reached) {
|
|
obj.begin_reached = 1;
|
|
/* First page not in buffer? */
|
|
fpos = ftell_obj(&obj);
|
|
|
|
if (fpos > obj.fd_bytes_read) {
|
|
/* Yes, we have to read it in */
|
|
lseek_set(&obj, 0L);
|
|
|
|
read_high(&obj, BUF_SIZE);
|
|
}
|
|
obj.in_buf = 0;
|
|
moved = TRUE;
|
|
}
|
|
break;
|
|
case DLGK_PAGE_LAST:
|
|
obj.end_reached = TRUE;
|
|
/* Last page not in buffer? */
|
|
fpos = ftell_obj(&obj);
|
|
|
|
if (fpos < obj.file_size) {
|
|
/* Yes, we have to read it in */
|
|
lseek_end(&obj, -BUF_SIZE);
|
|
|
|
read_high(&obj, BUF_SIZE);
|
|
}
|
|
obj.in_buf = obj.bytes_read;
|
|
back_lines(&obj, (long) PAGE_LENGTH);
|
|
moved = TRUE;
|
|
break;
|
|
case DLGK_GRID_UP: /* Previous line */
|
|
if (!obj.begin_reached) {
|
|
back_lines(&obj, obj.page_length + 1);
|
|
next = 1;
|
|
moved = TRUE;
|
|
}
|
|
break;
|
|
case DLGK_PAGE_PREV: /* Previous page */
|
|
case DLGK_MOUSE(KEY_PPAGE):
|
|
if (!obj.begin_reached) {
|
|
back_lines(&obj, obj.page_length + PAGE_LENGTH);
|
|
moved = TRUE;
|
|
}
|
|
break;
|
|
case DLGK_GRID_DOWN: /* Next line */
|
|
if (!obj.end_reached) {
|
|
obj.begin_reached = 0;
|
|
next = -1;
|
|
moved = TRUE;
|
|
}
|
|
break;
|
|
case DLGK_PAGE_NEXT: /* Next page */
|
|
case DLGK_MOUSE(KEY_NPAGE):
|
|
if (!obj.end_reached) {
|
|
obj.begin_reached = 0;
|
|
moved = TRUE;
|
|
}
|
|
break;
|
|
case DLGK_BEGIN: /* Beginning of line */
|
|
if (obj.hscroll > 0) {
|
|
obj.hscroll = 0;
|
|
/* Reprint current page to scroll horizontally */
|
|
back_lines(&obj, obj.page_length);
|
|
moved = TRUE;
|
|
}
|
|
break;
|
|
case DLGK_GRID_LEFT: /* Scroll left */
|
|
if (obj.hscroll > 0) {
|
|
obj.hscroll--;
|
|
/* Reprint current page to scroll horizontally */
|
|
back_lines(&obj, obj.page_length);
|
|
moved = TRUE;
|
|
}
|
|
break;
|
|
case DLGK_GRID_RIGHT: /* Scroll right */
|
|
if (obj.hscroll < MAX_LEN) {
|
|
obj.hscroll++;
|
|
/* Reprint current page to scroll horizontally */
|
|
back_lines(&obj, obj.page_length);
|
|
moved = TRUE;
|
|
}
|
|
break;
|
|
#ifdef KEY_RESIZE
|
|
case KEY_RESIZE:
|
|
/* reset data */
|
|
height = old_height;
|
|
width = old_width;
|
|
back_lines(&obj, obj.page_length);
|
|
/* repaint */
|
|
dlg_clear();
|
|
dlg_del_window(dialog);
|
|
refresh();
|
|
dlg_mouse_free_regions();
|
|
goto retry;
|
|
#endif
|
|
}
|
|
} else {
|
|
switch (key) {
|
|
case '/': /* Forward search */
|
|
case 'n': /* Repeat forward search */
|
|
case '?': /* Backward search */
|
|
case 'N': /* Repeat backward search */
|
|
moved = perform_search(&obj, height, width, key, search_term);
|
|
fkey = FALSE;
|
|
break;
|
|
default:
|
|
beep();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
dlg_del_window(dialog);
|
|
free(obj.buf);
|
|
(void) close(obj.fd);
|
|
dlg_mouse_free_regions();
|
|
return result;
|
|
}
|