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elinks/src/bfu/dialog.c

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/* Dialog box implementation. */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include "elinks.h"
#include "bfu/dialog.h"
#include "config/kbdbind.h"
#include "config/options.h"
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#include "intl/charsets.h"
#include "intl/gettext/libintl.h"
#include "terminal/draw.h"
#include "main/timer.h"
#include "terminal/kbd.h"
#include "terminal/terminal.h"
#include "terminal/window.h"
#include "util/color.h"
#include "util/conv.h"
#include "util/error.h"
#include "util/memlist.h"
#include "util/memory.h"
#include "util/string.h"
static window_handler_T dialog_func;
struct dialog_data *
do_dialog(struct terminal *term, struct dialog *dlg,
struct memory_list *ml)
{
struct dialog_data *dlg_data;
dlg_data = mem_calloc(1, sizeof(*dlg_data) +
sizeof(struct widget_data) * dlg->number_of_widgets);
if (!dlg_data) {
/* Worry not: freeml() checks whether its argument is NULL. */
freeml(ml);
return NULL;
}
dlg_data->dlg = dlg;
dlg_data->number_of_widgets = dlg->number_of_widgets;
dlg_data->ml = ml;
add_window(term, dialog_func, dlg_data);
return dlg_data;
}
static void cycle_widget_focus(struct dialog_data *dlg_data, int direction);
static void
update_all_widgets(struct dialog_data *dlg_data)
{
struct widget_data *widget_data;
/* Iterate backwards rather than forwards so that listboxes are drawn
* last, which means that they can grab the cursor. Yes, 'tis hacky. */
foreach_widget_back(dlg_data, widget_data) {
display_widget(dlg_data, widget_data);
}
}
void
redraw_dialog(struct dialog_data *dlg_data, int layout)
{
struct terminal *term = dlg_data->win->term;
struct color_pair *title_color;
if (layout) {
dlg_data->dlg->layouter(dlg_data);
/* This might not be the best place. We need to be able
* to make focusability of widgets dynamic so widgets
* like scrollable text don't receive focus when there
* is nothing to scroll. */
if (!widget_is_focusable(selected_widget(dlg_data)))
cycle_widget_focus(dlg_data, 1);
}
if (!dlg_data->dlg->layout.only_widgets) {
struct box box;
set_box(&box,
dlg_data->box.x + (DIALOG_LEFT_BORDER + 1),
dlg_data->box.y + (DIALOG_TOP_BORDER + 1),
dlg_data->box.width - 2 * (DIALOG_LEFT_BORDER + 1),
dlg_data->box.height - 2 * (DIALOG_TOP_BORDER + 1));
draw_border(term, &box, get_bfu_color(term, "dialog.frame"), DIALOG_FRAME);
assert(dlg_data->dlg->title);
title_color = get_bfu_color(term, "dialog.title");
if (title_color && box.width > 2) {
unsigned char *title = dlg_data->dlg->title;
#ifdef CONFIG_UTF_8
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unsigned char *t2 = title;
int titlelen = strlen(title);
int len = term->utf8 ? strlen_utf8(&t2) : titlelen;
len = int_min(box.width - 2, len);
int x = (box.width - len) / 2 + box.x;
#else
int titlelen = int_min(box.width - 2, strlen(title));
int x = (box.width - titlelen) / 2 + box.x;
#endif /* CONFIG_UTF_8 */
int y = box.y - 1;
draw_text(term, x - 1, y, " ", 1, 0, title_color);
draw_text(term, x, y, title, titlelen, 0, title_color);
#ifdef CONFIG_UTF_8
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draw_text(term, x + len, y, " ", 1, 0, title_color);
#else
draw_text(term, x + titlelen, y, " ", 1, 0, title_color);
#endif /* CONFIG_UTF_8 */
}
}
update_all_widgets(dlg_data);
redraw_from_window(dlg_data->win);
}
static void
select_dlg_item(struct dialog_data *dlg_data, struct widget_data *widget_data)
{
select_widget(dlg_data, widget_data);
if (widget_data->widget->ops->select)
widget_data->widget->ops->select(dlg_data, widget_data);
}
static struct widget_ops *widget_type_to_ops[] = {
&checkbox_ops,
&field_ops,
&field_pass_ops,
&button_ops,
&listbox_ops,
&text_ops,
};
static struct widget_data *
init_widget(struct dialog_data *dlg_data, int i)
{
struct widget_data *widget_data = &dlg_data->widgets_data[i];
memset(widget_data, 0, sizeof(*widget_data));
widget_data->widget = &dlg_data->dlg->widgets[i];
if (widget_data->widget->datalen) {
widget_data->cdata = mem_alloc(widget_data->widget->datalen);
if (!widget_data->cdata) {
return NULL;
}
memcpy(widget_data->cdata,
widget_data->widget->data,
widget_data->widget->datalen);
}
widget_data->widget->ops = widget_type_to_ops[widget_data->widget->type];
if (widget_has_history(widget_data)) {
init_list(widget_data->info.field.history);
widget_data->info.field.cur_hist =
(struct input_history_entry *) &widget_data->info.field.history;
}
if (widget_data->widget->ops->init)
widget_data->widget->ops->init(dlg_data, widget_data);
return widget_data;
}
void
select_widget(struct dialog_data *dlg_data, struct widget_data *widget_data)
{
struct widget_data *previously_selected_widget;
previously_selected_widget = selected_widget(dlg_data);
dlg_data->selected_widget_id = widget_data - dlg_data->widgets_data;
display_widget(dlg_data, previously_selected_widget);
display_widget(dlg_data, widget_data);
}
struct widget_data *
select_widget_by_id(struct dialog_data *dlg_data, int i)
{
struct widget_data *widget_data;
if (i >= dlg_data->number_of_widgets)
return NULL;
widget_data = &dlg_data->widgets_data[i];
select_widget(dlg_data, widget_data);
return widget_data;
}
static void
cycle_widget_focus(struct dialog_data *dlg_data, int direction)
{
int prev_selected = dlg_data->selected_widget_id;
struct widget_data *previously_selected_widget;
previously_selected_widget = selected_widget(dlg_data);
do {
dlg_data->selected_widget_id += direction;
if (dlg_data->selected_widget_id >= dlg_data->number_of_widgets)
dlg_data->selected_widget_id = 0;
else if (dlg_data->selected_widget_id < 0)
dlg_data->selected_widget_id = dlg_data->number_of_widgets - 1;
} while (!widget_is_focusable(selected_widget(dlg_data))
&& dlg_data->selected_widget_id != prev_selected);
display_widget(dlg_data, previously_selected_widget);
display_widget(dlg_data, selected_widget(dlg_data));
redraw_from_window(dlg_data->win);
}
static void
dialog_ev_init(struct dialog_data *dlg_data)
{
int i;
/* TODO: foreachback_widget() */
for (i = dlg_data->number_of_widgets - 1; i >= 0; i--) {
struct widget_data *widget_data;
widget_data = init_widget(dlg_data, i);
/* Make sure the selected widget is focusable */
if (widget_data
&& widget_is_focusable(widget_data))
dlg_data->selected_widget_id = i;
}
}
#ifdef CONFIG_MOUSE
static void
dialog_ev_mouse(struct dialog_data *dlg_data)
{
struct widget_data *widget_data;
foreach_widget(dlg_data, widget_data) {
if (widget_data->widget->ops->mouse
&& widget_data->widget->ops->mouse(dlg_data, widget_data)
== EVENT_PROCESSED)
break;
}
}
#endif /* CONFIG_MOUSE */
/* Look up for a button with matching flag. */
static void
select_button_by_flag(struct dialog_data *dlg_data, int flag)
{
struct widget_data *widget_data;
foreach_widget(dlg_data, widget_data) {
if (widget_data->widget->type == WIDGET_BUTTON
&& widget_data->widget->info.button.flags & flag) {
select_dlg_item(dlg_data, widget_data);
break;
}
}
}
/* Look up for a button with matching starting letter. */
static void
select_button_by_key(struct dialog_data *dlg_data)
{
unsigned char key;
struct widget_data *widget_data;
struct term_event *ev = dlg_data->term_event;
if (!check_kbd_label_key(ev)) return;
key = toupper(get_kbd_key(ev));
foreach_widget(dlg_data, widget_data) {
int hk_pos;
if (widget_data->widget->type != WIDGET_BUTTON)
continue;
/* We first try to match marked hotkey if there is
* one else we fallback to first character in button
* name. */
hk_pos = widget_data->widget->info.button.hotkey_pos;
if (hk_pos >= 0) {
if (toupper(widget_data->widget->text[hk_pos + 1]) != key)
continue;
} else {
if (toupper(widget_data->widget->text[0]) != key)
continue;
}
select_dlg_item(dlg_data, widget_data);
break;
}
}
static void
dialog_ev_kbd(struct dialog_data *dlg_data)
{
struct widget_data *widget_data = selected_widget(dlg_data);
struct widget_ops *ops = widget_data->widget->ops;
/* XXX: KEYMAP_EDIT ? --pasky */
enum menu_action action_id;
struct term_event *ev = dlg_data->term_event;
/* First let the widget try out. */
if (ops->kbd && ops->kbd(dlg_data, widget_data) == EVENT_PROCESSED)
return;
action_id = kbd_action(KEYMAP_MENU, ev, NULL);
switch (action_id) {
case ACT_MENU_SELECT:
/* Can we select? */
if (ops->select) {
ops->select(dlg_data, widget_data);
}
break;
case ACT_MENU_ENTER:
/* Submit button. */
if (ops->select) {
ops->select(dlg_data, widget_data);
break;
}
if (widget_is_textfield(widget_data)
|| check_kbd_modifier(ev, KBD_MOD_CTRL)
|| check_kbd_modifier(ev, KBD_MOD_ALT)) {
select_button_by_flag(dlg_data, B_ENTER);
}
break;
case ACT_MENU_CANCEL:
/* Cancel button. */
select_button_by_flag(dlg_data, B_ESC);
break;
case ACT_MENU_NEXT_ITEM:
case ACT_MENU_DOWN:
case ACT_MENU_RIGHT:
/* Cycle focus. */
cycle_widget_focus(dlg_data, 1);
break;
case ACT_MENU_PREVIOUS_ITEM:
case ACT_MENU_UP:
case ACT_MENU_LEFT:
/* Cycle focus (reverse). */
cycle_widget_focus(dlg_data, -1);
break;
case ACT_MENU_REDRAW:
redraw_terminal_cls(dlg_data->win->term);
break;
default:
select_button_by_key(dlg_data);
break;
}
}
static void
dialog_ev_abort(struct dialog_data *dlg_data)
{
struct widget_data *widget_data;
if (dlg_data->dlg->refresh) {
struct dialog_refresh *refresh = dlg_data->dlg->refresh;
kill_timer(&refresh->timer);
mem_free(refresh);
}
if (dlg_data->dlg->abort)
dlg_data->dlg->abort(dlg_data);
foreach_widget(dlg_data, widget_data) {
mem_free_if(widget_data->cdata);
if (widget_has_history(widget_data))
free_list(widget_data->info.field.history);
}
freeml(dlg_data->ml);
}
/* TODO: use EVENT_PROCESSED/EVENT_NOT_PROCESSED. */
static void
dialog_func(struct window *win, struct term_event *ev)
{
struct dialog_data *dlg_data = win->data;
dlg_data->win = win;
dlg_data->term_event = ev;
/* Look whether user event handlers can help us.. */
if (dlg_data->dlg->handle_event &&
(dlg_data->dlg->handle_event(dlg_data) == EVENT_PROCESSED)) {
return;
}
switch (ev->ev) {
case EVENT_INIT:
dialog_ev_init(dlg_data);
/* fallback */
case EVENT_RESIZE:
case EVENT_REDRAW:
redraw_dialog(dlg_data, 1);
break;
case EVENT_MOUSE:
#ifdef CONFIG_MOUSE
dialog_ev_mouse(dlg_data);
#endif
break;
case EVENT_KBD:
dialog_ev_kbd(dlg_data);
break;
case EVENT_ABORT:
dialog_ev_abort(dlg_data);
break;
}
}
int
check_dialog(struct dialog_data *dlg_data)
{
struct widget_data *widget_data;
foreach_widget(dlg_data, widget_data) {
if (widget_data->widget->type != WIDGET_CHECKBOX &&
!widget_is_textfield(widget_data))
continue;
if (widget_data->widget->handler &&
widget_data->widget->handler(dlg_data, widget_data)) {
select_widget(dlg_data, widget_data);
redraw_dialog(dlg_data, 0);
return 1;
}
}
return 0;
}
widget_handler_status_T
cancel_dialog(struct dialog_data *dlg_data, struct widget_data *xxx)
{
delete_window(dlg_data->win);
return EVENT_PROCESSED;
}
int
update_dialog_data(struct dialog_data *dlg_data)
{
struct widget_data *widget_data;
foreach_widget(dlg_data, widget_data) {
if (!widget_data->widget->datalen)
continue;
memcpy(widget_data->widget->data,
widget_data->cdata,
widget_data->widget->datalen);
}
return 0;
}
widget_handler_status_T
ok_dialog(struct dialog_data *dlg_data, struct widget_data *widget_data)
{
done_handler_T *done = widget_data->widget->info.button.done;
void *done_data = widget_data->widget->info.button.done_data;
if (check_dialog(dlg_data)) return EVENT_NOT_PROCESSED;
update_dialog_data(dlg_data);
if (done) done(done_data);
return cancel_dialog(dlg_data, widget_data);
}
/* Clear dialog fields (if widget has clear callback). */
widget_handler_status_T
clear_dialog(struct dialog_data *dlg_data, struct widget_data *xxx)
{
struct widget_data *widget_data;
foreach_widget(dlg_data, widget_data) {
if (widget_data->widget->ops->clear)
widget_data->widget->ops->clear(dlg_data, widget_data);
}
/* Move focus to the first widget. It helps with bookmark search dialog
* (and others). */
select_widget_by_id(dlg_data, 0);
redraw_dialog(dlg_data, 0);
return EVENT_PROCESSED;
}
static void
format_widgets(struct terminal *term, struct dialog_data *dlg_data,
int x, int *y, int w, int h, int *rw)
{
struct widget_data *wdata = dlg_data->widgets_data;
int widgets = dlg_data->number_of_widgets;
/* TODO: Do something if (*y) gets > height. */
for (; widgets > 0; widgets--, wdata++, (*y)++) {
switch (wdata->widget->type) {
case WIDGET_FIELD_PASS:
case WIDGET_FIELD:
dlg_format_field(term, wdata, x, y, w, rw, ALIGN_LEFT);
break;
case WIDGET_LISTBOX:
dlg_format_listbox(term, wdata, x, y, w, h, rw, ALIGN_LEFT);
break;
case WIDGET_TEXT:
dlg_format_text(term, wdata, x, y, w, rw, h);
break;
case WIDGET_CHECKBOX:
{
int group = widget_has_group(wdata);
if (group > 0 && dlg_data->dlg->layout.float_groups) {
int size;
/* Find group size */
for (size = 1; widgets > 0; size++, widgets--) {
struct widget_data *next = &wdata[size];
if (group != widget_has_group(next))
break;
}
dlg_format_group(term, wdata, size, x, y, w, rw);
wdata += size - 1;
} else {
/* No horizontal space between checkboxes belonging to
* the same group. */
dlg_format_checkbox(term, wdata, x, y, w, rw, ALIGN_LEFT);
if (widgets > 1
&& group == widget_has_group(&wdata[1]))
(*y)--;
}
}
break;
/* We assume that the buttons are all stuffed at the very end
* of the dialog. */
case WIDGET_BUTTON:
dlg_format_buttons(term, wdata, widgets,
x, y, w, rw, ALIGN_CENTER);
return;
}
}
}
void
generic_dialog_layouter(struct dialog_data *dlg_data)
{
struct terminal *term = dlg_data->win->term;
int w = dialog_max_width(term);
int height = dialog_max_height(term);
int rw = int_min(w, strlen(dlg_data->dlg->title));
int y = dlg_data->dlg->layout.padding_top ? 0 : -1;
int x = 0;
format_widgets(NULL, dlg_data, x, &y, w, height, &rw);
/* Update the width to respond to the required minimum width */
if (dlg_data->dlg->layout.fit_datalen) {
int_lower_bound(&rw, dlg_data->dlg->widgets->datalen);
int_upper_bound(&w, rw);
} else if (!dlg_data->dlg->layout.maximize_width) {
w = rw;
}
draw_dialog(dlg_data, w, y);
y = dlg_data->box.y + DIALOG_TB + dlg_data->dlg->layout.padding_top;
x = dlg_data->box.x + DIALOG_LB;
format_widgets(term, dlg_data, x, &y, w, height, NULL);
}
void
draw_dialog(struct dialog_data *dlg_data, int width, int height)
{
struct terminal *term = dlg_data->win->term;
int dlg_width = int_min(term->width, width + 2 * DIALOG_LB);
int dlg_height = int_min(term->height, height + 2 * DIALOG_TB);
set_box(&dlg_data->box,
(term->width - dlg_width) / 2, (term->height - dlg_height) / 2,
dlg_width, dlg_height);
draw_box(term, &dlg_data->box, ' ', 0,
get_bfu_color(term, "dialog.generic"));
if (get_opt_bool("ui.dialogs.shadows")) {
/* Draw shadow */
draw_shadow(term, &dlg_data->box,
get_bfu_color(term, "dialog.shadow"), 2, 1);
}
}
static void
do_refresh_dialog(struct dialog_data *dlg_data)
{
struct dialog_refresh *refresh = dlg_data->dlg->refresh;
enum dlg_refresh_code refresh_code;
assert(refresh && refresh->handler);
refresh_code = refresh->handler(dlg_data, refresh->data);
if (refresh_code == REFRESH_CANCEL
|| refresh_code == REFRESH_STOP) {
refresh->timer = TIMER_ID_UNDEF;
if (refresh_code == REFRESH_CANCEL)
cancel_dialog(dlg_data, NULL);
return;
}
/* We want dialog_has_refresh() to be true while drawing
* so we can not set the timer to -1. */
if (refresh_code == REFRESH_DIALOG) {
redraw_dialog(dlg_data, 1);
}
install_timer(&refresh->timer, RESOURCE_INFO_REFRESH,
(void (*)(void *)) do_refresh_dialog, dlg_data);
}
void
refresh_dialog(struct dialog_data *dlg_data, dialog_refresh_handler_T handler, void *data)
{
struct dialog_refresh *refresh = dlg_data->dlg->refresh;
if (!refresh) {
refresh = mem_calloc(1, sizeof(*refresh));
if (!refresh) return;
dlg_data->dlg->refresh = refresh;
} else {
kill_timer(&refresh->timer);
}
refresh->handler = handler;
refresh->data = data;
install_timer(&refresh->timer, RESOURCE_INFO_REFRESH,
(void (*)(void *)) do_refresh_dialog, dlg_data);
}