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/*
* Calcurse - text-based organizer
*
* Copyright (c) 2004-2022 calcurse Development Team <misc@calcurse.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Send your feedback or comments to : misc@calcurse.org
* Calcurse home page : http://calcurse.org
*
*/
#include "calcurse.h"
static void listbox_fix_sel(struct listbox *, int);
static void listbox_sel_in_view(struct listbox *);
void listbox_init(struct listbox *lb, int y, int x, int h, int w,
const char *label, listbox_fn_item_type_t fn_type,
listbox_fn_item_height_t fn_height,
listbox_fn_draw_item_t fn_draw)
{
EXIT_IF(lb == NULL, "null pointer");
wins_scrollwin_init(&(lb->sw), y, x, h, w, label);
lb->item_count = lb->item_sel = 0;
lb->fn_type = fn_type;
lb->type = NULL;
lb->fn_height = fn_height;
lb->ch = NULL;
lb->fn_draw = fn_draw;
lb->cb_data = NULL;
}
void listbox_delete(struct listbox *lb)
{
EXIT_IF(lb == NULL, "null pointer");
wins_scrollwin_delete(&(lb->sw));
mem_free(lb->type);
mem_free(lb->ch);
}
void listbox_resize(struct listbox *lb, int y, int x, int h, int w)
{
EXIT_IF(lb == NULL, "null pointer");
wins_scrollwin_resize(&(lb->sw), y, x, h, w);
if (lb->item_sel < 0)
return;
listbox_sel_in_view(lb);
}
void listbox_set_cb_data(struct listbox *lb, void *cb_data)
{
lb->cb_data = cb_data;
}
void listbox_load_items(struct listbox *lb, int item_count)
{
int i, ch;
lb->item_count = item_count;
if (item_count == 0) {
lb->item_sel = -1;
return;
}
mem_free(lb->type);
mem_free(lb->ch);
lb->type = mem_malloc(item_count * sizeof(unsigned));
lb->ch = mem_malloc((item_count + 1) * sizeof(unsigned));
for (i = 0, ch = 0; i < item_count; i++) {
lb->type[i] = lb->fn_type(i, lb->cb_data);
lb->ch[i] = ch;
ch += lb->fn_height(i, lb->cb_data);
}
lb->ch[item_count] = ch;
/* The pad lines: 0,.., ch - 1. */
wins_scrollwin_set_pad(&(lb->sw), ch);
/* Adjust the selection. */
listbox_fix_sel(lb, 1);
listbox_sel_in_view(lb);
}
void listbox_draw_deco(struct listbox *lb, int hilt)
{
wins_scrollwin_draw_deco(&(lb->sw), hilt);
}
void listbox_display(struct listbox *lb, int hilt)
{
int i;
werase(lb->sw.inner);
for (i = 0; i < lb->item_count; i++) {
int is_sel = (i == lb->item_sel);
lb->fn_draw(i, lb->sw.inner, lb->ch[i], is_sel, lb->cb_data);
}
wins_scrollwin_display(&(lb->sw), hilt);
}
int listbox_get_sel(struct listbox *lb)
{
return lb->item_sel;
}
/* Avoid non-text items. */
static void listbox_fix_sel(struct listbox *lb, int direction)
{
int did_flip = 0;
if (lb->item_count == 0 || direction == 0)
return;
direction = direction > 0 ? 1 : -1;
if (lb->item_sel < 0)
lb->item_sel = 0;
else if (lb->item_sel >= lb->item_count)
lb->item_sel = lb->item_count - 1;
while (lb->type[lb->item_sel] != LISTBOX_ROW_TEXT) {
if ((direction == -1 && lb->item_sel == 0) ||
(direction == 1 && lb->item_sel == lb->item_count - 1)) {
if (did_flip) {
lb->item_sel = -1;
return;
}
direction = -direction;
did_flip = 1;
} else {
lb->item_sel += direction;
}
}
}
void listbox_set_sel(struct listbox *lb, unsigned pos)
{
lb->item_sel = pos;
listbox_fix_sel(lb, 1);
if (lb->item_sel < 0)
return;
listbox_sel_in_view(lb);
}
void listbox_item_in_view(struct listbox *lb, int item)
{
int first_line = lb->ch[item];
int last_line = lb->ch[item + 1] - 1;
wins_scrollwin_in_view(&(lb->sw), first_line);
if (last_line != first_line)
wins_scrollwin_in_view(&(lb->sw), last_line);
}
/* Keep the selection in view. */
static void listbox_sel_in_view(struct listbox *lb)
{
listbox_item_in_view(lb, lb->item_sel);
}
/* Returns true if the move succeeded. */
int listbox_sel_move(struct listbox *lb, int delta)
{
int saved_sel = lb->item_sel;
if (lb->item_count == 0)
return 0;
lb->item_sel += delta;
listbox_fix_sel(lb, delta);
if (lb->item_sel < 0)
return 0;
listbox_sel_in_view(lb);
return lb->item_sel != saved_sel;
}
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