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freebsd-nq/contrib/dialog/treeview.c
Baptiste Daroussin a96ef45019 dialog: import dialog 1.3-20210117
2021-02-26 10:16:49 +01:00

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/*
* $Id: treeview.c,v 1.43 2020/11/23 00:38:31 tom Exp $
*
* treeview.c -- implements the treeview dialog
*
* Copyright 2012-2019,2020 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
* as published by the Free Software Foundation.
*
* 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 <dlg_internals.h>
#include <dlg_keys.h>
#define INDENT 3
#define MIN_HIGH (1 + (5 * MARGIN))
typedef struct {
/* the outer-window */
WINDOW *dialog;
bool is_check;
int box_y;
int box_x;
int check_x;
int item_x;
int use_height;
int use_width;
/* the inner-window */
WINDOW *list;
DIALOG_LISTITEM *items;
int item_no;
int *depths;
const char *states;
} ALL_DATA;
/*
* Print list item. The 'selected' parameter is true if 'choice' is the
* current item. That one is colored differently from the other items.
*/
static void
print_item(ALL_DATA * data,
DIALOG_LISTITEM * item,
const char *states,
int depths,
int choice,
int selected)
{
WINDOW *win = data->list;
chtype save = dlg_get_attrs(win);
int i;
bool first = TRUE;
int climit = (getmaxx(win) - data->check_x + 1);
const char *show = (dialog_vars.no_items
? item->name
: item->text);
/* Clear 'residue' of last item */
dlg_attrset(win, menubox_attr);
(void) wmove(win, choice, 0);
for (i = 0; i < data->use_width; i++)
(void) waddch(win, ' ');
(void) wmove(win, choice, data->check_x);
dlg_attrset(win, selected ? check_selected_attr : check_attr);
(void) wprintw(win,
data->is_check ? "[%c]" : "(%c)",
states[item->state]);
dlg_attrset(win, menubox_attr);
dlg_attrset(win, selected ? item_selected_attr : item_attr);
for (i = 0; i < depths; ++i) {
int j;
(void) wmove(win, choice, data->item_x + INDENT * i);
(void) waddch(win, ACS_VLINE);
for (j = INDENT - 1; j > 0; --j)
(void) waddch(win, ' ');
}
(void) wmove(win, choice, data->item_x + INDENT * depths);
dlg_print_listitem(win, show, climit, first, selected);
if (selected) {
dlg_item_help(item->help);
}
dlg_attrset(win, save);
}
static void
print_list(ALL_DATA * data,
int choice,
int scrollamt,
int max_choice)
{
int i;
int cur_y, cur_x;
getyx(data->dialog, cur_y, cur_x);
for (i = 0; i < max_choice; i++) {
print_item(data,
&data->items[scrollamt + i],
data->states,
data->depths[scrollamt + i],
i, i == choice);
}
(void) wnoutrefresh(data->list);
dlg_draw_scrollbar(data->dialog,
(long) (scrollamt),
(long) (scrollamt),
(long) (scrollamt + max_choice),
(long) (data->item_no),
data->box_x + data->check_x,
data->box_x + data->use_width,
data->box_y,
data->box_y + data->use_height + 1,
menubox_border2_attr,
menubox_border_attr);
(void) wmove(data->dialog, cur_y, cur_x);
}
static bool
check_hotkey(DIALOG_LISTITEM * items, int choice)
{
bool result = FALSE;
if (dlg_match_char(dlg_last_getc(),
(dialog_vars.no_tags
? items[choice].text
: items[choice].name))) {
result = TRUE;
}
return result;
}
/*
* This is an alternate interface to 'treeview' which allows the application
* to read the list item states back directly without putting them in the
* output buffer.
*/
int
dlg_treeview(const char *title,
const char *cprompt,
int height,
int width,
int list_height,
int item_no,
DIALOG_LISTITEM * items,
const char *states,
int *depths,
int flag,
int *current_item)
{
/* *INDENT-OFF* */
static DLG_KEYS_BINDING binding[] = {
HELPKEY_BINDINGS,
ENTERKEY_BINDINGS,
DLG_KEYS_DATA( DLGK_FIELD_NEXT, KEY_RIGHT ),
DLG_KEYS_DATA( DLGK_FIELD_NEXT, TAB ),
DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_BTAB ),
DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_LEFT ),
DLG_KEYS_DATA( DLGK_ITEM_FIRST, KEY_HOME ),
DLG_KEYS_DATA( DLGK_ITEM_LAST, KEY_END ),
DLG_KEYS_DATA( DLGK_ITEM_LAST, KEY_LL ),
DLG_KEYS_DATA( DLGK_ITEM_NEXT, '+' ),
DLG_KEYS_DATA( DLGK_ITEM_NEXT, KEY_DOWN ),
DLG_KEYS_DATA( DLGK_ITEM_NEXT, CHR_NEXT ),
DLG_KEYS_DATA( DLGK_ITEM_PREV, '-' ),
DLG_KEYS_DATA( DLGK_ITEM_PREV, KEY_UP ),
DLG_KEYS_DATA( DLGK_ITEM_PREV, CHR_PREVIOUS ),
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) ),
TOGGLEKEY_BINDINGS,
END_KEYS_BINDING
};
/* *INDENT-ON* */
#ifdef KEY_RESIZE
int old_height = height;
int old_width = width;
#endif
ALL_DATA all;
int i, j, key2, found, x, y, cur_y, box_x, box_y;
int key, fkey;
int button = dialog_state.visit_items ? -1 : dlg_default_button();
int choice = dlg_default_listitem(items);
int scrollamt = 0;
int max_choice;
int use_height;
int use_width, name_width, text_width, tree_width;
int result = DLG_EXIT_UNKNOWN;
int num_states;
WINDOW *dialog, *list;
char *prompt = dlg_strclone(cprompt);
const char **buttons = dlg_ok_labels();
const char *widget_name;
/* we need at least two states */
if (states == 0 || strlen(states) < 2)
states = " *";
num_states = (int) strlen(states);
dialog_state.plain_buttons = TRUE;
memset(&all, 0, sizeof(all));
all.items = items;
all.item_no = item_no;
all.states = states;
all.depths = depths;
dlg_does_output();
dlg_tab_correct_str(prompt);
/*
* If this is a radiobutton list, ensure that no more than one item is
* selected initially. Allow none to be selected, since some users may
* wish to provide this flavor.
*/
if (flag == FLAG_RADIO) {
bool first = TRUE;
for (i = 0; i < item_no; i++) {
if (items[i].state) {
if (first) {
first = FALSE;
} else {
items[i].state = 0;
}
}
}
} else {
all.is_check = TRUE;
}
widget_name = "treeview";
#ifdef KEY_RESIZE
retry:
#endif
use_height = list_height;
use_width = dlg_calc_list_width(item_no, items) + 10;
use_width = MAX(26, use_width);
if (use_height == 0) {
/* calculate height without items (4) */
dlg_auto_size(title, prompt, &height, &width, MIN_HIGH, use_width);
dlg_calc_listh(&height, &use_height, item_no);
} else {
dlg_auto_size(title, prompt, &height, &width, MIN_HIGH + use_height, use_width);
}
dlg_button_layout(buttons, &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, widget_name, binding);
dlg_register_buttons(dialog, widget_name, buttons);
dlg_mouse_setbase(x, y);
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_attrset(dialog, dialog_attr);
dlg_print_autowrap(dialog, prompt, height, width);
all.use_width = width - 4;
cur_y = getcury(dialog);
box_y = cur_y + 1;
box_x = (width - all.use_width) / 2 - 1;
/*
* After displaying the prompt, we know how much space we really have.
* Limit the list to avoid overwriting the ok-button.
*/
use_height = height - MIN_HIGH - cur_y;
if (use_height <= 0)
use_height = 1;
max_choice = MIN(use_height, item_no);
/* create new window for the list */
list = dlg_sub_window(dialog, use_height, all.use_width,
y + box_y + 1, x + box_x + 1);
/* draw a box around the list items */
dlg_draw_box(dialog, box_y, box_x,
use_height + 2 * MARGIN,
all.use_width + 2 * MARGIN,
menubox_border_attr, menubox_border2_attr);
text_width = 0;
name_width = 0;
tree_width = 0;
/* Find length of longest item to center treeview */
for (i = 0; i < item_no; i++) {
tree_width = MAX(tree_width, INDENT * depths[i]);
text_width = MAX(text_width, dlg_count_columns(items[i].text));
name_width = MAX(name_width, dlg_count_columns(items[i].name));
}
if (dialog_vars.no_tags && !dialog_vars.no_items) {
tree_width += text_width;
} else if (dialog_vars.no_items) {
tree_width += name_width;
} else {
tree_width += (text_width + name_width);
}
use_width = (all.use_width - 4);
tree_width = MIN(tree_width, all.use_width);
all.check_x = (use_width - tree_width) / 2;
all.item_x = ((dialog_vars.no_tags
? 0
: (dialog_vars.no_items
? 0
: (2 + name_width)))
+ all.check_x + 4);
/* ensure we are scrolled to show the current choice */
if (choice >= (max_choice + scrollamt)) {
scrollamt = choice - max_choice + 1;
choice = max_choice - 1;
}
/* register the new window, along with its borders */
dlg_mouse_mkbigregion(box_y + 1, box_x,
use_height, all.use_width + 2,
KEY_MAX, 1, 1, 1 /* by lines */ );
all.dialog = dialog;
all.box_x = box_x;
all.box_y = box_y;
all.use_height = use_height;
all.list = list;
print_list(&all, choice, scrollamt, max_choice);
dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width);
dlg_trace_win(dialog);
while (result == DLG_EXIT_UNKNOWN) {
int was_mouse;
if (button < 0) /* --visit-items */
wmove(dialog, box_y + choice + 1, box_x + all.check_x + 2);
key = dlg_mouse_wgetch(dialog, &fkey);
if (dlg_result_key(key, fkey, &result)) {
if (!dlg_button_key(result, &button, &key, &fkey))
break;
}
was_mouse = (fkey && is_DLGK_MOUSE(key));
if (was_mouse)
key -= M_EVENT;
if (was_mouse && (key >= KEY_MAX)) {
i = (key - KEY_MAX);
if (i < max_choice) {
choice = (key - KEY_MAX);
print_list(&all, choice, scrollamt, max_choice);
key = DLGK_TOGGLE; /* force the selected item to toggle */
} else {
beep();
continue;
}
fkey = FALSE;
} else if (was_mouse && key >= KEY_MIN) {
key = dlg_lookup_key(dialog, key, &fkey);
}
/*
* A space toggles the item status.
*/
if (key == DLGK_TOGGLE) {
int current = scrollamt + choice;
int next = items[current].state + 1;
if (next >= num_states)
next = 0;
if (flag == FLAG_CHECK) { /* checklist? */
items[current].state = next;
} else {
for (i = 0; i < item_no; i++) {
if (i != current) {
items[i].state = 0;
}
}
if (items[current].state) {
items[current].state = next ? next : 1;
} else {
items[current].state = 1;
}
}
print_list(&all, choice, scrollamt, max_choice);
continue; /* wait for another key press */
}
/*
* Check if key pressed matches first character of any item tag in
* list. If there is more than one match, we will cycle through
* each one as the same key is pressed repeatedly.
*/
found = FALSE;
if (!fkey) {
if (button < 0 || !dialog_state.visit_items) {
for (j = scrollamt + choice + 1; j < item_no; j++) {
if (check_hotkey(items, j)) {
found = TRUE;
i = j - scrollamt;
break;
}
}
if (!found) {
for (j = 0; j <= scrollamt + choice; j++) {
if (check_hotkey(items, j)) {
found = TRUE;
i = j - scrollamt;
break;
}
}
}
if (found)
dlg_flush_getc();
} else if ((j = dlg_char_to_button(key, buttons)) >= 0) {
button = j;
ungetch('\n');
continue;
}
}
/*
* A single digit (1-9) positions the selection to that line in the
* current screen.
*/
if (!found
&& (key <= '9')
&& (key > '0')
&& (key - '1' < max_choice)) {
found = TRUE;
i = key - '1';
}
if (!found) {
if (fkey) {
found = TRUE;
switch (key) {
case DLGK_ITEM_FIRST:
i = -scrollamt;
break;
case DLGK_ITEM_LAST:
i = item_no - 1 - scrollamt;
break;
case DLGK_PAGE_PREV:
if (choice)
i = 0;
else if (scrollamt != 0)
i = -MIN(scrollamt, max_choice);
else
continue;
break;
case DLGK_PAGE_NEXT:
i = MIN(choice + max_choice, item_no - scrollamt - 1);
break;
case DLGK_ITEM_PREV:
i = choice - 1;
if (choice == 0 && scrollamt == 0)
continue;
break;
case DLGK_ITEM_NEXT:
i = choice + 1;
if (scrollamt + choice >= item_no - 1)
continue;
break;
default:
found = FALSE;
break;
}
}
}
if (found) {
if (i != choice) {
if (i < 0 || i >= max_choice) {
if (i < 0) {
scrollamt += i;
choice = 0;
} else {
choice = max_choice - 1;
scrollamt += (i - max_choice + 1);
}
print_list(&all, choice, scrollamt, max_choice);
} else {
choice = i;
print_list(&all, choice, scrollamt, max_choice);
}
}
continue; /* wait for another key press */
}
if (fkey) {
switch (key) {
case DLGK_ENTER:
result = dlg_enter_buttoncode(button);
break;
case DLGK_LEAVE:
result = dlg_ok_buttoncode(button);
break;
case DLGK_FIELD_PREV:
button = dlg_prev_button(buttons, button);
dlg_draw_buttons(dialog, height - 2, 0, buttons, button,
FALSE, width);
break;
case DLGK_FIELD_NEXT:
button = dlg_next_button(buttons, button);
dlg_draw_buttons(dialog, height - 2, 0, buttons, button,
FALSE, width);
break;
#ifdef KEY_RESIZE
case KEY_RESIZE:
dlg_will_resize(dialog);
/* reset data */
height = old_height;
width = old_width;
/* repaint */
_dlg_resize_cleanup(dialog);
goto retry;
#endif
default:
if (was_mouse) {
if ((key2 = dlg_ok_buttoncode(key)) >= 0) {
result = key2;
break;
}
beep();
}
}
} else if (key > 0) {
beep();
}
}
dlg_del_window(dialog);
dlg_mouse_free_regions();
free(prompt);
*current_item = (scrollamt + choice);
return result;
}
/*
* Display a set of items as a tree.
*/
int
dialog_treeview(const char *title,
const char *cprompt,
int height,
int width,
int list_height,
int item_no,
char **items,
int flag)
{
int result;
int i, j;
DIALOG_LISTITEM *listitems;
int *depths;
bool show_status = FALSE;
int current = 0;
char *help_result;
DLG_TRACE(("# treeview args:\n"));
DLG_TRACE2S("title", title);
DLG_TRACE2S("message", cprompt);
DLG_TRACE2N("height", height);
DLG_TRACE2N("width", width);
DLG_TRACE2N("lheight", list_height);
DLG_TRACE2N("llength", item_no);
/* FIXME dump the items[][] too */
DLG_TRACE2N("flag", flag);
listitems = dlg_calloc(DIALOG_LISTITEM, (size_t) item_no + 1);
assert_ptr(listitems, "dialog_treeview");
depths = dlg_calloc(int, (size_t) item_no + 1);
assert_ptr(depths, "dialog_treeview");
for (i = j = 0; i < item_no; ++i) {
listitems[i].name = items[j++];
listitems[i].text = (dialog_vars.no_items
? dlg_strempty()
: items[j++]);
listitems[i].state = !dlg_strcmp(items[j++], "on");
depths[i] = atoi(items[j++]);
listitems[i].help = ((dialog_vars.item_help)
? items[j++]
: dlg_strempty());
}
dlg_align_columns(&listitems[0].text, (int) sizeof(DIALOG_LISTITEM), item_no);
result = dlg_treeview(title,
cprompt,
height,
width,
list_height,
item_no,
listitems,
NULL,
depths,
flag,
&current);
switch (result) {
case DLG_EXIT_OK: /* FALLTHRU */
case DLG_EXIT_EXTRA:
show_status = TRUE;
break;
case DLG_EXIT_HELP:
dlg_add_help_listitem(&result, &help_result, &listitems[current]);
if ((show_status = dialog_vars.help_status)) {
if (dialog_vars.separate_output) {
dlg_add_string(help_result);
dlg_add_separator();
} else {
dlg_add_quoted(help_result);
}
} else {
dlg_add_string(help_result);
}
break;
}
if (show_status) {
for (i = 0; i < item_no; i++) {
if (listitems[i].state) {
if (dlg_need_separator())
dlg_add_separator();
if (dialog_vars.separate_output) {
dlg_add_string(listitems[i].name);
} else {
if (flag == FLAG_CHECK)
dlg_add_quoted(listitems[i].name);
else
dlg_add_string(listitems[i].name);
}
}
}
AddLastKey();
}
dlg_free_columns(&listitems[0].text, (int) sizeof(DIALOG_LISTITEM), item_no);
free(depths);
free(listitems);
return result;
}
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