| Current Path : /compat/linux/proc/68247/root/usr/src/contrib/dialog/ |
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| Current File : //compat/linux/proc/68247/root/usr/src/contrib/dialog/editbox.c |
/*
* $Id: editbox.c,v 1.55 2011/06/21 00:10:46 tom Exp $
*
* editbox.c -- implements the edit box
*
* Copyright 2007-2010,2011 Thomas E. Dickey
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License, version 2.1
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to
* Free Software Foundation, Inc.
* 51 Franklin St., Fifth Floor
* Boston, MA 02110, USA.
*/
#include <dialog.h>
#include <dlg_keys.h>
#include <sys/stat.h>
#define sTEXT -1
static void
fail_list(void)
{
dlg_exiterr("File too large");
}
static void
grow_list(char ***list, int *have, int want)
{
if (want > *have) {
size_t last = (size_t) *have;
size_t need = (size_t) (want | 31) + 3;
*have = (int) need;
(*list) = dlg_realloc(char *, need, *list);
if ((*list) == 0) {
fail_list();
}
while (++last < need) {
(*list)[last] = 0;
}
}
}
static void
load_list(const char *file, char ***list, int *rows)
{
FILE *fp;
char *blob = 0;
struct stat sb;
unsigned n, pass;
unsigned need;
size_t size;
*list = 0;
*rows = 0;
if (stat(file, &sb) < 0 ||
(sb.st_mode & S_IFMT) != S_IFREG)
dlg_exiterr("Not a file: %s", file);
size = (size_t) sb.st_size;
if ((blob = dlg_malloc(char, size + 1)) == 0)
fail_list();
blob[size] = '\0';
if ((fp = fopen(file, "r")) == 0)
dlg_exiterr("Cannot open: %s", file);
size = fread(blob, sizeof(char), size, fp);
fclose(fp);
for (pass = 0; pass < 2; ++pass) {
int first = TRUE;
need = 0;
for (n = 0; n < size; ++n) {
if (first && pass) {
(*list)[need] = blob + n;
first = FALSE;
}
if (blob[n] == '\n') {
first = TRUE;
++need;
if (pass)
blob[n] = '\0';
}
}
if (pass) {
if (need == 0) {
(*list)[0] = dlg_strclone("");
(*list)[1] = 0;
} else {
for (n = 0; n < need; ++n) {
(*list)[n] = dlg_strclone((*list)[n]);
}
(*list)[need] = 0;
}
} else {
grow_list(list, rows, (int) need + 1);
}
}
free(blob);
}
static void
free_list(char ***list, int *rows)
{
if (*list != 0) {
int n;
for (n = 0; n < (*rows); ++n) {
if ((*list)[n] != 0)
free((*list)[n]);
}
free(*list);
*list = 0;
}
*rows = 0;
}
/*
* Display a single row in the editing window:
* thisrow is the actual row number that's being displayed.
* show_row is the row number that's highlighted for edit.
* base_row is the first row number in the window
*/
static bool
display_one(WINDOW *win,
char *text,
int thisrow,
int show_row,
int base_row,
int chr_offset)
{
bool result;
if (text != 0) {
dlg_show_string(win,
text,
chr_offset,
((thisrow == show_row)
? form_active_text_attr
: form_text_attr),
thisrow - base_row,
0,
getmaxx(win),
FALSE,
FALSE);
result = TRUE;
} else {
result = FALSE;
}
return result;
}
static void
display_all(WINDOW *win,
char **list,
int show_row,
int firstrow,
int lastrow,
int chr_offset)
{
int limit = getmaxy(win);
int row;
dlg_attr_clear(win, getmaxy(win), getmaxx(win), dialog_attr);
if (lastrow - firstrow >= limit)
lastrow = firstrow + limit;
for (row = firstrow; row < lastrow; ++row) {
if (!display_one(win, list[row],
row, show_row, firstrow,
(row == show_row) ? chr_offset : 0))
break;
}
}
static int
size_list(char **list)
{
int result = 0;
if (list != 0) {
while (*list++ != 0) {
++result;
}
}
return result;
}
static bool
scroll_to(int pagesize, int rows, int *base_row, int *this_row, int target)
{
bool result = FALSE;
if (target < *base_row) {
if (target < 0) {
if (*base_row == 0 && *this_row == 0) {
beep();
} else {
*this_row = 0;
*base_row = 0;
result = TRUE;
}
} else {
*this_row = target;
*base_row = target;
result = TRUE;
}
} else if (target >= rows) {
if (*this_row < rows - 1) {
*this_row = rows - 1;
*base_row = rows - 1;
result = TRUE;
} else {
beep();
}
} else if (target >= *base_row + pagesize) {
*this_row = target;
*base_row = target;
result = TRUE;
} else {
*this_row = target;
result = FALSE;
}
if (pagesize < rows) {
if (*base_row + pagesize >= rows) {
*base_row = rows - pagesize;
}
} else {
*base_row = 0;
}
return result;
}
static int
col_to_chr_offset(const char *text, int col)
{
const int *cols = dlg_index_columns(text);
const int *indx = dlg_index_wchars(text);
bool found = FALSE;
int result = 0;
unsigned n;
unsigned len = (unsigned) dlg_count_wchars(text);
for (n = 0; n < len; ++n) {
if (cols[n] <= col && cols[n + 1] > col) {
result = indx[n];
found = TRUE;
break;
}
}
if (!found && len && cols[len] == col) {
result = indx[len];
}
return result;
}
#define SCROLL_TO(target) show_all = scroll_to(pagesize, listsize, &base_row, &thisrow, target)
#define PREV_ROW (*list)[thisrow - 1]
#define THIS_ROW (*list)[thisrow]
#define NEXT_ROW (*list)[thisrow + 1]
#define UPDATE_COL(input) col_offset = dlg_edit_offset(input, chr_offset, box_width)
static int
widest_line(char **list)
{
int result = MAX_LEN;
char *value;
if (list != 0) {
while ((value = *list++) != 0) {
int check = (int) strlen(value);
if (check > result)
result = check;
}
}
return result;
}
#define NAVIGATE_BINDINGS \
DLG_KEYS_DATA( DLGK_GRID_DOWN, KEY_DOWN ), \
DLG_KEYS_DATA( DLGK_GRID_RIGHT, KEY_RIGHT ), \
DLG_KEYS_DATA( DLGK_GRID_LEFT, KEY_LEFT ), \
DLG_KEYS_DATA( DLGK_GRID_UP, KEY_UP ), \
DLG_KEYS_DATA( DLGK_FIELD_NEXT, TAB ), \
DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_BTAB ), \
DLG_KEYS_DATA( DLGK_PAGE_FIRST, KEY_HOME ), \
DLG_KEYS_DATA( DLGK_PAGE_LAST, KEY_END ), \
DLG_KEYS_DATA( DLGK_PAGE_LAST, KEY_LL ), \
DLG_KEYS_DATA( DLGK_PAGE_NEXT, KEY_NPAGE ), \
DLG_KEYS_DATA( DLGK_PAGE_NEXT, DLGK_MOUSE(KEY_NPAGE) ), \
DLG_KEYS_DATA( DLGK_PAGE_PREV, KEY_PPAGE ), \
DLG_KEYS_DATA( DLGK_PAGE_PREV, DLGK_MOUSE(KEY_PPAGE) )
/*
* Display a dialog box for editing a copy of a file
*/
int
dlg_editbox(const char *title,
char ***list,
int *rows,
int height,
int width)
{
/* *INDENT-OFF* */
static DLG_KEYS_BINDING binding[] = {
HELPKEY_BINDINGS,
ENTERKEY_BINDINGS,
NAVIGATE_BINDINGS,
END_KEYS_BINDING
};
static DLG_KEYS_BINDING binding2[] = {
INPUTSTR_BINDINGS,
HELPKEY_BINDINGS,
ENTERKEY_BINDINGS,
NAVIGATE_BINDINGS,
END_KEYS_BINDING
};
/* *INDENT-ON* */
#ifdef KEY_RESIZE
int old_height = height;
int old_width = width;
#endif
int x, y, box_y, box_x, box_height, box_width;
int show_buttons;
int thisrow, base_row, lastrow;
int goal_col = -1;
int col_offset = 0;
int chr_offset = 0;
int key, fkey, code;
int pagesize;
int listsize = size_list(*list);
int result = DLG_EXIT_UNKNOWN;
int state;
size_t max_len = (size_t) dlg_max_input(widest_line(*list));
char *input, *buffer;
bool show_all, show_one, was_mouse;
WINDOW *dialog;
WINDOW *editing;
DIALOG_VARS save_vars;
const char **buttons = dlg_ok_labels();
int mincols = (3 * COLS / 4);
dlg_save_vars(&save_vars);
dialog_vars.separate_output = TRUE;
dlg_does_output();
buffer = dlg_malloc(char, max_len + 1);
assert_ptr(buffer, "dlg_editbox");
thisrow = base_row = lastrow = 0;
#ifdef KEY_RESIZE
retry:
#endif
show_buttons = TRUE;
state = dialog_vars.defaultno ? dlg_defaultno_button() : sTEXT;
key = fkey = 0;
dlg_button_layout(buttons, &mincols);
dlg_auto_size(title, "", &height, &width, 3 * LINES / 4, mincols);
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, "editbox", binding);
dlg_register_buttons(dialog, "editbox", buttons);
dlg_mouse_setbase(x, y);
dlg_draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
dlg_draw_bottom_box(dialog);
dlg_draw_title(dialog, title);
wattrset(dialog, dialog_attr);
/* Draw the editing field in a box */
box_y = MARGIN + 0;
box_x = MARGIN + 1;
box_width = width - 2 - (2 * MARGIN);
box_height = height - (4 * MARGIN);
dlg_draw_box(dialog,
box_y,
box_x,
box_height,
box_width,
border_attr, dialog_attr);
dlg_mouse_mkbigregion(box_y + MARGIN,
box_x + MARGIN,
box_height - (2 * MARGIN),
box_width - (2 * MARGIN),
KEY_MAX, 1, 1, 3);
editing = dlg_sub_window(dialog,
box_height - (2 * MARGIN),
box_width - (2 * MARGIN),
getbegy(dialog) + box_y + 1,
getbegx(dialog) + box_x + 1);
dlg_register_window(editing, "editbox", binding2);
show_all = TRUE;
show_one = FALSE;
pagesize = getmaxy(editing);
while (result == DLG_EXIT_UNKNOWN) {
int edit = 0;
if (show_all) {
display_all(editing, *list, thisrow, base_row, listsize, chr_offset);
display_one(editing, THIS_ROW,
thisrow, thisrow, base_row, chr_offset);
show_all = FALSE;
show_one = TRUE;
} else {
if (thisrow != lastrow) {
display_one(editing, (*list)[lastrow],
lastrow, thisrow, base_row, 0);
show_one = TRUE;
}
}
if (show_one) {
display_one(editing, THIS_ROW,
thisrow, thisrow, base_row, chr_offset);
getyx(editing, y, x);
dlg_draw_scrollbar(dialog,
base_row,
base_row,
base_row + pagesize,
listsize,
box_x,
box_x + getmaxx(editing),
box_y + 0,
box_y + getmaxy(editing) + 1,
dialog_attr,
border_attr);
wmove(editing, y, x);
show_one = FALSE;
}
lastrow = thisrow;
input = THIS_ROW;
/*
* The last field drawn determines where the cursor is shown:
*/
if (show_buttons) {
show_buttons = FALSE;
UPDATE_COL(input);
if (state != sTEXT) {
display_one(editing, input, thisrow,
-1, base_row, 0);
wrefresh(editing);
}
dlg_draw_buttons(dialog,
height - 2,
0,
buttons,
(state != sTEXT) ? state : 99,
FALSE,
width);
if (state == sTEXT) {
display_one(editing, input, thisrow,
thisrow, base_row, chr_offset);
}
}
key = dlg_mouse_wgetch((state == sTEXT) ? editing : dialog, &fkey);
if (key == ERR) {
result = DLG_EXIT_ERROR;
break;
} else if (key == ESC) {
result = DLG_EXIT_ESC;
break;
}
if (state != sTEXT) {
if (dlg_result_key(key, fkey, &result))
break;
}
was_mouse = (fkey && is_DLGK_MOUSE(key));
if (was_mouse)
key -= M_EVENT;
/*
* Handle mouse clicks first, since we want to know if this is a
* button, or something that dlg_edit_string() should handle.
*/
if (fkey
&& was_mouse
&& (code = dlg_ok_buttoncode(key)) >= 0) {
result = code;
continue;
}
if (was_mouse
&& (key >= KEY_MAX)) {
int wide = getmaxx(editing);
int cell = key - KEY_MAX;
thisrow = (cell / wide) + base_row;
col_offset = (cell % wide);
chr_offset = col_to_chr_offset(THIS_ROW, col_offset);
show_one = TRUE;
if (state != sTEXT) {
state = sTEXT;
show_buttons = TRUE;
}
continue;
} else if (was_mouse && key >= KEY_MIN) {
key = dlg_lookup_key(dialog, key, &fkey);
}
if (state == sTEXT) { /* editing box selected */
/*
* Intercept scrolling keys that dlg_edit_string() does not
* understand.
*/
if (fkey) {
bool moved = TRUE;
switch (key) {
case DLGK_GRID_UP:
SCROLL_TO(thisrow - 1);
break;
case DLGK_GRID_DOWN:
SCROLL_TO(thisrow + 1);
break;
case DLGK_PAGE_FIRST:
SCROLL_TO(0);
break;
case DLGK_PAGE_LAST:
SCROLL_TO(listsize);
break;
case DLGK_PAGE_NEXT:
SCROLL_TO(base_row + pagesize);
break;
case DLGK_PAGE_PREV:
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;
}