722 lines
16 KiB
C
722 lines
16 KiB
C
/*
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* $Id: editbox.c,v 1.55 2011/06/21 00:10:46 tom Exp $
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*
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* editbox.c -- implements the edit box
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*
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* Copyright 2007-2010,2011 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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*
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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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#include <dialog.h>
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#include <dlg_keys.h>
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#include <sys/stat.h>
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#define sTEXT -1
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static void
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fail_list(void)
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{
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dlg_exiterr("File too large");
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}
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static void
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grow_list(char ***list, int *have, int want)
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{
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if (want > *have) {
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size_t last = (size_t) *have;
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size_t need = (size_t) (want | 31) + 3;
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*have = (int) need;
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(*list) = dlg_realloc(char *, need, *list);
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if ((*list) == 0) {
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fail_list();
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}
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while (++last < need) {
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(*list)[last] = 0;
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}
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}
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}
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static void
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load_list(const char *file, char ***list, int *rows)
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{
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FILE *fp;
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char *blob = 0;
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struct stat sb;
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unsigned n, pass;
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unsigned need;
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size_t size;
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*list = 0;
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*rows = 0;
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if (stat(file, &sb) < 0 ||
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(sb.st_mode & S_IFMT) != S_IFREG)
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dlg_exiterr("Not a file: %s", file);
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size = (size_t) sb.st_size;
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if ((blob = dlg_malloc(char, size + 1)) == 0)
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fail_list();
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blob[size] = '\0';
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if ((fp = fopen(file, "r")) == 0)
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dlg_exiterr("Cannot open: %s", file);
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size = fread(blob, sizeof(char), size, fp);
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fclose(fp);
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for (pass = 0; pass < 2; ++pass) {
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int first = TRUE;
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need = 0;
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for (n = 0; n < size; ++n) {
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if (first && pass) {
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(*list)[need] = blob + n;
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first = FALSE;
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}
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if (blob[n] == '\n') {
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first = TRUE;
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++need;
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if (pass)
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blob[n] = '\0';
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}
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}
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if (pass) {
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if (need == 0) {
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(*list)[0] = dlg_strclone("");
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(*list)[1] = 0;
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} else {
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for (n = 0; n < need; ++n) {
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(*list)[n] = dlg_strclone((*list)[n]);
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}
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(*list)[need] = 0;
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}
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} else {
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grow_list(list, rows, (int) need + 1);
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}
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}
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free(blob);
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}
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static void
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free_list(char ***list, int *rows)
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{
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if (*list != 0) {
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int n;
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for (n = 0; n < (*rows); ++n) {
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if ((*list)[n] != 0)
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free((*list)[n]);
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}
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free(*list);
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*list = 0;
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}
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*rows = 0;
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}
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/*
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* Display a single row in the editing window:
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* thisrow is the actual row number that's being displayed.
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* show_row is the row number that's highlighted for edit.
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* base_row is the first row number in the window
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*/
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static bool
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display_one(WINDOW *win,
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char *text,
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int thisrow,
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int show_row,
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int base_row,
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int chr_offset)
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{
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bool result;
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if (text != 0) {
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dlg_show_string(win,
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text,
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chr_offset,
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((thisrow == show_row)
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? form_active_text_attr
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: form_text_attr),
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thisrow - base_row,
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0,
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getmaxx(win),
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FALSE,
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FALSE);
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result = TRUE;
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} else {
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result = FALSE;
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}
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return result;
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}
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static void
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display_all(WINDOW *win,
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char **list,
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int show_row,
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int firstrow,
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int lastrow,
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int chr_offset)
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{
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int limit = getmaxy(win);
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int row;
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dlg_attr_clear(win, getmaxy(win), getmaxx(win), dialog_attr);
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if (lastrow - firstrow >= limit)
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lastrow = firstrow + limit;
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for (row = firstrow; row < lastrow; ++row) {
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if (!display_one(win, list[row],
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row, show_row, firstrow,
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(row == show_row) ? chr_offset : 0))
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break;
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}
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}
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static int
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size_list(char **list)
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{
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int result = 0;
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if (list != 0) {
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while (*list++ != 0) {
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++result;
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}
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}
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return result;
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}
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static bool
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scroll_to(int pagesize, int rows, int *base_row, int *this_row, int target)
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{
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bool result = FALSE;
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if (target < *base_row) {
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if (target < 0) {
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if (*base_row == 0 && *this_row == 0) {
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beep();
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} else {
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*this_row = 0;
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*base_row = 0;
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result = TRUE;
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}
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} else {
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*this_row = target;
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*base_row = target;
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result = TRUE;
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}
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} else if (target >= rows) {
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if (*this_row < rows - 1) {
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*this_row = rows - 1;
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*base_row = rows - 1;
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result = TRUE;
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} else {
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beep();
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}
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} else if (target >= *base_row + pagesize) {
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*this_row = target;
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*base_row = target;
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result = TRUE;
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} else {
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*this_row = target;
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result = FALSE;
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}
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if (pagesize < rows) {
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if (*base_row + pagesize >= rows) {
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*base_row = rows - pagesize;
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}
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} else {
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*base_row = 0;
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}
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return result;
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}
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static int
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col_to_chr_offset(const char *text, int col)
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{
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const int *cols = dlg_index_columns(text);
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const int *indx = dlg_index_wchars(text);
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bool found = FALSE;
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int result = 0;
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unsigned n;
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unsigned len = (unsigned) dlg_count_wchars(text);
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for (n = 0; n < len; ++n) {
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if (cols[n] <= col && cols[n + 1] > col) {
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result = indx[n];
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found = TRUE;
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break;
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}
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}
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if (!found && len && cols[len] == col) {
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result = indx[len];
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}
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return result;
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}
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#define SCROLL_TO(target) show_all = scroll_to(pagesize, listsize, &base_row, &thisrow, target)
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#define PREV_ROW (*list)[thisrow - 1]
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#define THIS_ROW (*list)[thisrow]
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#define NEXT_ROW (*list)[thisrow + 1]
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#define UPDATE_COL(input) col_offset = dlg_edit_offset(input, chr_offset, box_width)
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static int
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widest_line(char **list)
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{
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int result = MAX_LEN;
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char *value;
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if (list != 0) {
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while ((value = *list++) != 0) {
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int check = (int) strlen(value);
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if (check > result)
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result = check;
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}
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}
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return result;
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}
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#define NAVIGATE_BINDINGS \
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DLG_KEYS_DATA( DLGK_GRID_DOWN, KEY_DOWN ), \
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DLG_KEYS_DATA( DLGK_GRID_RIGHT, KEY_RIGHT ), \
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DLG_KEYS_DATA( DLGK_GRID_LEFT, KEY_LEFT ), \
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DLG_KEYS_DATA( DLGK_GRID_UP, KEY_UP ), \
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DLG_KEYS_DATA( DLGK_FIELD_NEXT, TAB ), \
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DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_BTAB ), \
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DLG_KEYS_DATA( DLGK_PAGE_FIRST, KEY_HOME ), \
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DLG_KEYS_DATA( DLGK_PAGE_LAST, KEY_END ), \
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DLG_KEYS_DATA( DLGK_PAGE_LAST, KEY_LL ), \
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DLG_KEYS_DATA( DLGK_PAGE_NEXT, KEY_NPAGE ), \
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DLG_KEYS_DATA( DLGK_PAGE_NEXT, DLGK_MOUSE(KEY_NPAGE) ), \
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DLG_KEYS_DATA( DLGK_PAGE_PREV, KEY_PPAGE ), \
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DLG_KEYS_DATA( DLGK_PAGE_PREV, DLGK_MOUSE(KEY_PPAGE) )
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/*
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* Display a dialog box for editing a copy of a file
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*/
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int
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dlg_editbox(const char *title,
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char ***list,
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int *rows,
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int height,
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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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HELPKEY_BINDINGS,
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ENTERKEY_BINDINGS,
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NAVIGATE_BINDINGS,
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END_KEYS_BINDING
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};
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static DLG_KEYS_BINDING binding2[] = {
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INPUTSTR_BINDINGS,
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HELPKEY_BINDINGS,
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ENTERKEY_BINDINGS,
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NAVIGATE_BINDINGS,
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END_KEYS_BINDING
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};
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/* *INDENT-ON* */
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#ifdef KEY_RESIZE
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int old_height = height;
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int old_width = width;
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#endif
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int x, y, box_y, box_x, box_height, box_width;
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int show_buttons;
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int thisrow, base_row, lastrow;
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int goal_col = -1;
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int col_offset = 0;
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int chr_offset = 0;
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int key, fkey, code;
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int pagesize;
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int listsize = size_list(*list);
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int result = DLG_EXIT_UNKNOWN;
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int state;
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size_t max_len = (size_t) dlg_max_input(widest_line(*list));
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char *input, *buffer;
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bool show_all, show_one, was_mouse;
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WINDOW *dialog;
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WINDOW *editing;
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DIALOG_VARS save_vars;
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const char **buttons = dlg_ok_labels();
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int mincols = (3 * COLS / 4);
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dlg_save_vars(&save_vars);
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dialog_vars.separate_output = TRUE;
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dlg_does_output();
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buffer = dlg_malloc(char, max_len + 1);
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assert_ptr(buffer, "dlg_editbox");
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thisrow = base_row = lastrow = 0;
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#ifdef KEY_RESIZE
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retry:
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#endif
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show_buttons = TRUE;
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state = dialog_vars.defaultno ? dlg_defaultno_button() : sTEXT;
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key = fkey = 0;
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dlg_button_layout(buttons, &mincols);
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dlg_auto_size(title, "", &height, &width, 3 * LINES / 4, mincols);
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dlg_print_size(height, width);
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dlg_ctl_size(height, width);
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x = dlg_box_x_ordinate(width);
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y = dlg_box_y_ordinate(height);
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dialog = dlg_new_window(height, width, y, x);
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dlg_register_window(dialog, "editbox", binding);
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dlg_register_buttons(dialog, "editbox", buttons);
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dlg_mouse_setbase(x, y);
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dlg_draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
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dlg_draw_bottom_box(dialog);
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dlg_draw_title(dialog, title);
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wattrset(dialog, dialog_attr);
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/* Draw the editing field in a box */
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box_y = MARGIN + 0;
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box_x = MARGIN + 1;
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box_width = width - 2 - (2 * MARGIN);
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box_height = height - (4 * MARGIN);
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dlg_draw_box(dialog,
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box_y,
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box_x,
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box_height,
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box_width,
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border_attr, dialog_attr);
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dlg_mouse_mkbigregion(box_y + MARGIN,
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box_x + MARGIN,
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box_height - (2 * MARGIN),
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box_width - (2 * MARGIN),
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KEY_MAX, 1, 1, 3);
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editing = dlg_sub_window(dialog,
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box_height - (2 * MARGIN),
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box_width - (2 * MARGIN),
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getbegy(dialog) + box_y + 1,
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getbegx(dialog) + box_x + 1);
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dlg_register_window(editing, "editbox", binding2);
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show_all = TRUE;
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show_one = FALSE;
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pagesize = getmaxy(editing);
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while (result == DLG_EXIT_UNKNOWN) {
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int edit = 0;
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if (show_all) {
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display_all(editing, *list, thisrow, base_row, listsize, chr_offset);
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display_one(editing, THIS_ROW,
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thisrow, thisrow, base_row, chr_offset);
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show_all = FALSE;
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show_one = TRUE;
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} else {
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if (thisrow != lastrow) {
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display_one(editing, (*list)[lastrow],
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lastrow, thisrow, base_row, 0);
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show_one = TRUE;
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}
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}
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if (show_one) {
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display_one(editing, THIS_ROW,
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thisrow, thisrow, base_row, chr_offset);
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getyx(editing, y, x);
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dlg_draw_scrollbar(dialog,
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base_row,
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base_row,
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base_row + pagesize,
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listsize,
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box_x,
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box_x + getmaxx(editing),
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box_y + 0,
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box_y + getmaxy(editing) + 1,
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dialog_attr,
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border_attr);
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wmove(editing, y, x);
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show_one = FALSE;
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}
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lastrow = thisrow;
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input = THIS_ROW;
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/*
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* The last field drawn determines where the cursor is shown:
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*/
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if (show_buttons) {
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show_buttons = FALSE;
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UPDATE_COL(input);
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if (state != sTEXT) {
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display_one(editing, input, thisrow,
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-1, base_row, 0);
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wrefresh(editing);
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}
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dlg_draw_buttons(dialog,
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height - 2,
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0,
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buttons,
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(state != sTEXT) ? state : 99,
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FALSE,
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width);
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if (state == sTEXT) {
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display_one(editing, input, thisrow,
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thisrow, base_row, chr_offset);
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}
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}
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key = dlg_mouse_wgetch((state == sTEXT) ? editing : dialog, &fkey);
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if (key == ERR) {
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result = DLG_EXIT_ERROR;
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break;
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} else if (key == ESC) {
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result = DLG_EXIT_ESC;
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break;
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}
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if (state != sTEXT) {
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if (dlg_result_key(key, fkey, &result))
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break;
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}
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was_mouse = (fkey && is_DLGK_MOUSE(key));
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if (was_mouse)
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key -= M_EVENT;
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/*
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* Handle mouse clicks first, since we want to know if this is a
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* button, or something that dlg_edit_string() should handle.
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*/
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if (fkey
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&& was_mouse
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&& (code = dlg_ok_buttoncode(key)) >= 0) {
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result = code;
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continue;
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}
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if (was_mouse
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&& (key >= KEY_MAX)) {
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int wide = getmaxx(editing);
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int cell = key - KEY_MAX;
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thisrow = (cell / wide) + base_row;
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col_offset = (cell % wide);
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chr_offset = col_to_chr_offset(THIS_ROW, col_offset);
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show_one = TRUE;
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if (state != sTEXT) {
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state = sTEXT;
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show_buttons = TRUE;
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}
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continue;
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} else if (was_mouse && key >= KEY_MIN) {
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key = dlg_lookup_key(dialog, key, &fkey);
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}
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if (state == sTEXT) { /* editing box selected */
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/*
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* Intercept scrolling keys that dlg_edit_string() does not
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* understand.
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*/
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if (fkey) {
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bool moved = TRUE;
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switch (key) {
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case DLGK_GRID_UP:
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SCROLL_TO(thisrow - 1);
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break;
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case DLGK_GRID_DOWN:
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SCROLL_TO(thisrow + 1);
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break;
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case DLGK_PAGE_FIRST:
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SCROLL_TO(0);
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break;
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case DLGK_PAGE_LAST:
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SCROLL_TO(listsize);
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break;
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case DLGK_PAGE_NEXT:
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SCROLL_TO(base_row + pagesize);
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break;
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case DLGK_PAGE_PREV:
|
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if (thisrow > base_row) {
|
|
SCROLL_TO(base_row);
|
|
} else {
|
|
SCROLL_TO(base_row - pagesize);
|
|
}
|
|
break;
|
|
case DLGK_DELETE_LEFT:
|
|
if (chr_offset == 0) {
|
|
if (thisrow == 0) {
|
|
beep();
|
|
} else {
|
|
size_t len = (strlen(THIS_ROW) +
|
|
strlen(PREV_ROW) + 1);
|
|
char *tmp = dlg_malloc(char, len);
|
|
|
|
assert_ptr(tmp, "dlg_editbox");
|
|
|
|
chr_offset = dlg_count_wchars(PREV_ROW);
|
|
UPDATE_COL(PREV_ROW);
|
|
goal_col = col_offset;
|
|
|
|
sprintf(tmp, "%s%s", PREV_ROW, THIS_ROW);
|
|
if (len > max_len)
|
|
tmp[max_len] = '\0';
|
|
|
|
free(PREV_ROW);
|
|
PREV_ROW = tmp;
|
|
for (y = thisrow; y < listsize; ++y) {
|
|
(*list)[y] = (*list)[y + 1];
|
|
}
|
|
--listsize;
|
|
--thisrow;
|
|
SCROLL_TO(thisrow);
|
|
|
|
show_all = TRUE;
|
|
}
|
|
} else {
|
|
/* dlg_edit_string() can handle this case */
|
|
moved = FALSE;
|
|
}
|
|
break;
|
|
default:
|
|
moved = FALSE;
|
|
break;
|
|
}
|
|
if (moved) {
|
|
if (thisrow != lastrow) {
|
|
if (goal_col < 0)
|
|
goal_col = col_offset;
|
|
chr_offset = col_to_chr_offset(THIS_ROW, goal_col);
|
|
} else {
|
|
UPDATE_COL(THIS_ROW);
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
strncpy(buffer, input, max_len - 1)[max_len - 1] = '\0';
|
|
edit = dlg_edit_string(buffer, &chr_offset, key, fkey, FALSE);
|
|
|
|
if (edit) {
|
|
goal_col = UPDATE_COL(input);
|
|
if (strcmp(input, buffer)) {
|
|
free(input);
|
|
THIS_ROW = dlg_strclone(buffer);
|
|
input = THIS_ROW;
|
|
}
|
|
display_one(editing, input, thisrow,
|
|
thisrow, base_row, chr_offset);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* handle non-functionkeys */
|
|
if (!fkey && (code = dlg_char_to_button(key, buttons)) >= 0) {
|
|
dlg_del_window(dialog);
|
|
result = dlg_ok_buttoncode(code);
|
|
continue;
|
|
}
|
|
|
|
/* handle functionkeys */
|
|
if (fkey) {
|
|
switch (key) {
|
|
case DLGK_FIELD_PREV:
|
|
show_buttons = TRUE;
|
|
state = dlg_prev_ok_buttonindex(state, sTEXT);
|
|
break;
|
|
case DLGK_FIELD_NEXT:
|
|
show_buttons = TRUE;
|
|
state = dlg_next_ok_buttonindex(state, sTEXT);
|
|
break;
|
|
case DLGK_ENTER:
|
|
if (state == sTEXT) {
|
|
const int *indx = dlg_index_wchars(THIS_ROW);
|
|
int split = indx[chr_offset];
|
|
char *tmp = dlg_strclone(THIS_ROW + split);
|
|
|
|
assert_ptr(tmp, "dlg_editbox");
|
|
grow_list(list, rows, listsize + 1);
|
|
++listsize;
|
|
for (y = listsize; y > thisrow; --y) {
|
|
(*list)[y] = (*list)[y - 1];
|
|
}
|
|
THIS_ROW[split] = '\0';
|
|
++thisrow;
|
|
chr_offset = 0;
|
|
col_offset = 0;
|
|
THIS_ROW = tmp;
|
|
SCROLL_TO(thisrow);
|
|
show_all = TRUE;
|
|
} else {
|
|
result = dlg_ok_buttoncode(state);
|
|
}
|
|
break;
|
|
#ifdef KEY_RESIZE
|
|
case KEY_RESIZE:
|
|
/* reset data */
|
|
height = old_height;
|
|
width = old_width;
|
|
/* repaint */
|
|
dlg_clear();
|
|
dlg_del_window(editing);
|
|
dlg_del_window(dialog);
|
|
refresh();
|
|
dlg_mouse_free_regions();
|
|
goto retry;
|
|
#endif
|
|
default:
|
|
beep();
|
|
break;
|
|
}
|
|
} else {
|
|
if ((key == ' ') && (state != sTEXT)) {
|
|
result = dlg_ok_buttoncode(state);
|
|
} else {
|
|
beep();
|
|
}
|
|
}
|
|
}
|
|
|
|
dlg_unregister_window(editing);
|
|
dlg_del_window(editing);
|
|
dlg_del_window(dialog);
|
|
dlg_mouse_free_regions();
|
|
|
|
/*
|
|
* The caller's copy of the (*list)[] array has been updated, but for
|
|
* consistency with the other widgets, we put the "real" result in
|
|
* the output buffer.
|
|
*/
|
|
if (result == DLG_EXIT_OK) {
|
|
int n;
|
|
for (n = 0; n < listsize; ++n) {
|
|
dlg_add_result((*list)[n]);
|
|
dlg_add_separator();
|
|
}
|
|
}
|
|
free(buffer);
|
|
dlg_restore_vars(&save_vars);
|
|
return result;
|
|
}
|
|
|
|
int
|
|
dialog_editbox(const char *title, const char *file, int height, int width)
|
|
{
|
|
int result;
|
|
char **list;
|
|
int rows;
|
|
|
|
load_list(file, &list, &rows);
|
|
result = dlg_editbox(title, &list, &rows, height, width);
|
|
free_list(&list, &rows);
|
|
return result;
|
|
}
|