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/*
* Calcurse - text-based organizer
*
* Copyright (c) 2004-2017 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 <stdlib.h>
#include <string.h>
#include <math.h>
#include "calcurse.h"
#define SCREEN_ACQUIRE \
pthread_cleanup_push(screen_cleanup, (void *)NULL); \
screen_acquire();
#define SCREEN_RELEASE \
screen_release(); \
pthread_cleanup_pop(0);
/* Variables to handle calcurse windows. */
struct window win[NBWINS];
struct scrollwin sw_cal;
struct listbox lb_apt;
struct listbox lb_todo;
/* User-configurable side bar width. */
static unsigned sbarwidth_perc;
static enum win slctd_win;
static int layout;
/*
* The screen_mutex mutex and wins_refresh(), wins_wrefresh(), wins_doupdate()
* functions are used to prevent concurrent updates of the screen.
* It was observed that the display could get screwed up when mulitple threads
* tried to refresh the screen at the same time.
*
* Note (2010-03-21):
* Since recent versions of ncurses (5.7), rudimentary support for threads are
* available (use_screen(), use_window() for instance - see curs_threads(3)),
* but to remain compatible with earlier versions, it was chosen to rely on a
* screen-level mutex instead.
*/
static pthread_mutex_t screen_mutex = PTHREAD_MUTEX_INITIALIZER;
static unsigned screen_acquire(void)
{
if (pthread_mutex_lock(&screen_mutex) != 0)
return 0;
else
return 1;
}
static void screen_release(void)
{
pthread_mutex_unlock(&screen_mutex);
}
static void screen_cleanup(void *arg)
{
screen_release();
}
/*
* FIXME: The following functions currently lock the whole screen. Use both
* window-level and screen-level mutexes (or use use_screen() and use_window(),
* see curs_threads(3)) to avoid locking too much.
*/
unsigned wins_nbar_lock(void)
{
return screen_acquire();
}
void wins_nbar_unlock(void)
{
screen_release();
}
void wins_nbar_cleanup(void *arg)
{
wins_nbar_unlock();
}
unsigned wins_calendar_lock(void)
{
return screen_acquire();
}
void wins_calendar_unlock(void)
{
screen_release();
}
void wins_calendar_cleanup(void *arg)
{
wins_calendar_unlock();
}
int wins_refresh(void)
{
int rc;
SCREEN_ACQUIRE;
rc = refresh();
SCREEN_RELEASE;
return rc;
}
int wins_wrefresh(WINDOW * win)
{
int rc;
if (!win)
return ERR;
SCREEN_ACQUIRE;
rc = wrefresh(win);
SCREEN_RELEASE;
return rc;
}
int wins_doupdate(void)
{
int rc;
SCREEN_ACQUIRE;
rc = doupdate();
SCREEN_RELEASE;
return rc;
}
int wins_redrawwin(WINDOW *win)
{
int rc;
SCREEN_ACQUIRE;
rc = redrawwin(win);
SCREEN_RELEASE;
return rc;
}
/* Get the current layout. */
int wins_layout(void)
{
return layout;
}
/* Set the current layout. */
void wins_set_layout(int nb)
{
layout = nb;
}
/* Get the current side bar width. */
unsigned wins_sbar_width(void)
{
if (sbarwidth_perc > SBARMAXWIDTHPERC) {
return col * SBARMAXWIDTHPERC / 100;
} else {
unsigned sbarwidth =
(unsigned)(col * sbarwidth_perc / 100);
return (sbarwidth <
SBARMINWIDTH) ? SBARMINWIDTH : sbarwidth;
}
}
/*
* Return the side bar width in percentage of the total number of columns
* available in calcurse's screen.
*/
unsigned wins_sbar_wperc(void)
{
return sbarwidth_perc >
SBARMAXWIDTHPERC ? SBARMAXWIDTHPERC : sbarwidth_perc;
}
/*
* Set side bar width (unit: number of characters) given a width in percentage
* of calcurse's screen total width.
* The side bar could not have a width representing more than 50% of the screen,
* and could not be less than SBARMINWIDTH characters.
*/
void wins_set_sbar_width(unsigned perc)
{
sbarwidth_perc = perc;
}
/* Change the width of the side bar within acceptable boundaries. */
void wins_sbar_winc(void)
{
if (sbarwidth_perc < SBARMAXWIDTHPERC)
sbarwidth_perc++;
}
void wins_sbar_wdec(void)
{
if (sbarwidth_perc > 0)
sbarwidth_perc--;
}
/* Returns an enum which corresponds to the window which is selected. */
enum win wins_slctd(void)
{
return slctd_win;
}
/* Sets the selected window. */
void wins_slctd_set(enum win window)
{
slctd_win = window;
}
/* TAB key was hit in the interface, need to select next window. */
void wins_slctd_next(void)
{
if (slctd_win == TOD)
slctd_win = CAL;
else
slctd_win++;
}
static void wins_init_panels(void)
{
wins_scrollwin_init(&sw_cal, win[CAL].y, win[CAL].x,
CALHEIGHT + (conf.compact_panels ? 2 : 4),
wins_sbar_width(), _("Calendar"));
listbox_init(&lb_apt, win[APP].y, win[APP].x, win[APP].h, win[APP].w,
_("Appointments"), ui_day_row_type, ui_day_height,
ui_day_draw);
ui_day_load_items();
listbox_init(&lb_todo, win[TOD].y, win[TOD].x, win[TOD].h, win[TOD].w,
_("TODO"), ui_todo_row_type, ui_todo_height,
ui_todo_draw);
ui_todo_load_items();
}
/* Create all the windows. */
void wins_init(void)
{
wins_init_panels();
win[STA].p =
newwin(win[STA].h, win[STA].w, win[STA].y, win[STA].x);
win[KEY].p = newwin(1, 1, 1, 1);
keypad(win[STA].p, TRUE);
keypad(win[KEY].p, TRUE);
/* Notify that the curses mode is now launched. */
ui_mode = UI_CURSES;
}
/*
* Create a new window and its associated pad, which is used to make the
* scrolling faster.
*/
void wins_scrollwin_init(struct scrollwin *sw, int y, int x, int h, int w, const char *label)
{
EXIT_IF(sw == NULL, "null pointer");
sw->y = y;
sw->x = x;
sw->h = h;
sw->w = w;
sw->win = newwin(h, w, y, x);
sw->inner = newpad(BUFSIZ, w);
sw->line_num = sw->line_off = 0;
sw->label = label;
}
/* Resize a scrolling window. */
void wins_scrollwin_resize(struct scrollwin *sw, int y, int x, int h, int w)
{
EXIT_IF(sw == NULL, "null pointer");
sw->y = y;
sw->x = x;
sw->h = h;
sw->w = w;
delwin(sw->inner);
delwin(sw->win);
sw->win = newwin(h, w, y, x);
sw->inner = newpad(BUFSIZ, w);
}
/*
* Set the number of lines to be displayed.
*/
void wins_scrollwin_set_linecount(struct scrollwin *sw, unsigned lines)
{
sw->line_num = lines;
}
/* Free an already created scrollwin. */
void wins_scrollwin_delete(struct scrollwin *sw)
{
EXIT_IF(sw == NULL, "null pointer");
delwin(sw->inner);
delwin(sw->win);
}
/* Draw window border and label. */
void wins_scrollwin_draw_deco(struct scrollwin *sw, int hilt)
{
if (hilt)
wattron(sw->win, A_BOLD | COLOR_PAIR(COLR_CUSTOM));
box(sw->win, 0, 0);
if (!conf.compact_panels) {
mvwaddch(sw->win, 2, 0, ACS_LTEE);
mvwhline(sw->win, 2, 1, ACS_HLINE, sw->w - 2);
mvwaddch(sw->win, 2, sw->w - 1, ACS_RTEE);
}
if (hilt)
wattroff(sw->win, A_BOLD | COLOR_PAIR(COLR_CUSTOM));
if (!conf.compact_panels)
print_in_middle(sw->win, 1, 0, sw->w, sw->label);
}
/* Display a scrolling window. */
void wins_scrollwin_display(struct scrollwin *sw)
{
int inner_y = (conf.compact_panels ? 1 : 3);
int inner_x = 1;
int inner_h = sw->h - (conf.compact_panels ? 2 : 4);
int inner_w = sw->w - 2;
if (sw->line_num > inner_h) {
int sbar_h = MAX(inner_h * inner_h / sw->line_num, 1);
int sbar_y = inner_y + sw->line_off * (inner_h - sbar_h) / (sw->line_num - inner_h);
int sbar_x = sw->w - 1;
draw_scrollbar(sw->win, sbar_y, sbar_x, sbar_h, inner_y,
inner_y + inner_h - 1, 1);
}
wmove(win[STA].p, 0, 0);
wnoutrefresh(sw->win);
pnoutrefresh(sw->inner, sw->line_off, 0, sw->y + inner_y,
sw->x + inner_x, sw->y + inner_y + inner_h - 1,
sw->x + inner_x + inner_w - 1);
wins_doupdate();
}
void wins_scrollwin_up(struct scrollwin *sw, int amount)
{
if ((int)sw->line_off - amount > 0)
sw->line_off -= amount;
else
sw->line_off = 0;
}
void wins_scrollwin_down(struct scrollwin *sw, int amount)
{
int inner_h = sw->h - (conf.compact_panels ? 2 : 4);
sw->line_off += amount;
if ((int)sw->line_off > (int)sw->line_num - inner_h)
sw->line_off = sw->line_num - inner_h;
}
int wins_scrollwin_is_visible(struct scrollwin *sw, unsigned line)
{
int inner_h = sw->h - (conf.compact_panels ? 2 : 4);
return ((line >= sw->line_off) && (line < sw->line_off + inner_h));
}
void wins_scrollwin_ensure_visible(struct scrollwin *sw, unsigned line)
{
int inner_h = sw->h - (conf.compact_panels ? 2 : 4);
if (line < sw->line_off)
sw->line_off = line;
else if (line >= sw->line_off + inner_h)
sw->line_off = line - inner_h + 1;
}
void wins_scrollwin_set_lower(struct scrollwin *sw, unsigned line)
{
int inner_h = sw->h - (conf.compact_panels ? 2 : 4);
sw->line_off = MAX((int)line - inner_h + 1, 0);
}
void wins_resize_panels(void)
{
wins_get_config();
wins_scrollwin_resize(&sw_cal, win[CAL].y, win[CAL].x,
CALHEIGHT + (conf.compact_panels ? 2 : 4),
wins_sbar_width());
listbox_resize(&lb_apt, win[APP].y, win[APP].x, win[APP].h,
win[APP].w);
listbox_resize(&lb_todo, win[TOD].y, win[TOD].x, win[TOD].h,
win[TOD].w);
}
/*
* Delete the existing windows and recreate them with their new
* size and placement.
*/
void wins_resize(void)
{
wins_resize_panels();
delwin(win[STA].p);
delwin(win[KEY].p);
win[STA].p = newwin(win[STA].h, win[STA].w, win[STA].y, win[STA].x);
win[KEY].p = newwin(1, 1, 1, 1);
keypad(win[STA].p, TRUE);
keypad(win[KEY].p, TRUE);
if (notify_bar())
notify_reinit_bar();
}
/* Show the window with a border and a label. */
void wins_show(WINDOW * win, const char *label)
{
int width = getmaxx(win);
box(win, 0, 0);
if (!conf.compact_panels) {
mvwaddch(win, 2, 0, ACS_LTEE);
mvwhline(win, 2, 1, ACS_HLINE, width - 2);
mvwaddch(win, 2, width - 1, ACS_RTEE);
print_in_middle(win, 1, 0, width, label);
}
}
/*
* Get the screen size and recalculate the windows configurations.
*/
void wins_get_config(void)
{
enum win win_master;
enum win win_slave[2];
unsigned master_is_left;
/* Get the screen configuration */
getmaxyx(stdscr, row, col);
/* fixed values for status, notification bars and calendar */
win[STA].h = STATUSHEIGHT;
win[STA].w = col;
win[STA].y = row - win[STA].h;
win[STA].x = 0;
if (notify_bar()) {
win[NOT].h = 1;
win[NOT].w = col;
win[NOT].y = win[STA].y - 1;
win[NOT].x = 0;
} else {
win[NOT].h = 0;
win[NOT].w = 0;
win[NOT].y = 0;
win[NOT].x = 0;
}
win[CAL].h = CALHEIGHT + (conf.compact_panels ? 2 : 4);
if (layout <= 4) {
win_master = APP;
win_slave[0] = ((layout - 1) % 2 == 0) ? CAL : TOD;
win_slave[1] = ((layout - 1) % 2 == 1) ? CAL : TOD;
win[TOD].h = row - (win[CAL].h + win[STA].h + win[NOT].h);
} else {
win_master = TOD;
win_slave[0] = ((layout - 1) % 2 == 0) ? CAL : APP;
win_slave[1] = ((layout - 1) % 2 == 1) ? CAL : APP;
win[APP].h = row - (win[CAL].h + win[STA].h + win[NOT].h);
}
master_is_left = ((layout - 1) % 4 < 2);
win[win_master].x = master_is_left ? 0 : wins_sbar_width();
win[win_master].y = 0;
win[win_master].w = col - wins_sbar_width();
win[win_master].h = row - (win[STA].h + win[NOT].h);
win[win_slave[0]].x = win[win_slave[1]].x =
master_is_left ? win[win_master].w : 0;
win[win_slave[0]].y = 0;
win[win_slave[1]].y = win[win_slave[0]].h;
win[win_slave[0]].w = win[win_slave[1]].w = wins_sbar_width();
}
void wins_update_border(int flags)
{
if (flags & FLAG_CAL) {
WINS_CALENDAR_LOCK;
wins_scrollwin_draw_deco(&sw_cal, (slctd_win == CAL));
WINS_CALENDAR_UNLOCK;
}
if (flags & FLAG_APP)
listbox_draw_deco(&lb_apt, (slctd_win == APP));
if (flags & FLAG_TOD)
listbox_draw_deco(&lb_todo, (slctd_win == TOD));
}
void wins_update_panels(int flags)
{
if (flags & FLAG_APP)
ui_day_update_panel(slctd_win);
if (flags & FLAG_TOD)
ui_todo_update_panel(slctd_win);
if (flags & FLAG_CAL)
ui_calendar_update_panel();
}
/*
* Update all of the three windows and put a border around the
* selected window.
*/
void wins_update(int flags)
{
wins_update_border(flags);
wins_update_panels(flags);
if (flags & FLAG_STA) {
wins_update_bindings();
wins_status_bar();
}
if ((flags & FLAG_NOT) && notify_bar())
notify_update_bar();
wmove(win[STA].p, 0, 0);
wins_doupdate();
}
/* Reset the screen, needed when resizing terminal for example. */
void wins_reset_noupdate(void)
{
endwin();
wins_refresh();
curs_set(0);
wins_resize();
}
/* Reset the screen, needed when resizing terminal for example. */
void wins_reset(void)
{
wins_reset_noupdate();
wins_update(FLAG_ALL);
}
/* Prepare windows for the execution of an external command. */
void wins_prepare_external(void)
{
if (notify_bar())
notify_stop_main_thread();
if (conf.periodic_save > 0)
io_stop_psave_thread();
def_prog_mode();
ui_mode = UI_CMDLINE;
clear();
wins_refresh();
endwin();
sigs_ignore();
}
/* Restore windows when returning from an external command. */
void wins_unprepare_external(void)
{
sigs_unignore();
reset_prog_mode();
clearok(curscr, TRUE);
curs_set(0);
ui_mode = UI_CURSES;
wins_refresh();
wins_resize();
wins_update(FLAG_ALL);
if (notify_bar())
notify_start_main_thread();
if (conf.periodic_save > 0)
io_start_psave_thread();
}
/*
* While inside interactive mode, launch the external command cmd on the given
* file.
*/
void wins_launch_external(const char *arg[])
{
int pid;
wins_prepare_external();
if ((pid = shell_exec(NULL, NULL, *arg, arg)))
child_wait(NULL, NULL, pid);
wins_unprepare_external();
}
static int *bindings;
static int bindings_size;
static unsigned status_page;
/* Sets the current set of key bindings to display in the status bar. */
void wins_set_bindings(int *new_bindings, int size)
{
bindings = new_bindings;
bindings_size = size;
}
/*
* Obtains the set of key bindings to display for the active panel.
*
* To add a key binding, insert a new binding_t item and add it to the binding
* table.
*/
void wins_update_bindings(void)
{
static int bindings_cal[] = {
KEY_GENERIC_HELP, KEY_GENERIC_QUIT, KEY_GENERIC_SAVE,
KEY_GENERIC_RELOAD, KEY_GENERIC_CHANGE_VIEW,
KEY_GENERIC_SCROLL_DOWN, KEY_GENERIC_SCROLL_UP, KEY_MOVE_UP,
KEY_MOVE_DOWN, KEY_MOVE_LEFT, KEY_MOVE_RIGHT, KEY_GENERIC_GOTO,
KEY_GENERIC_IMPORT, KEY_GENERIC_EXPORT, KEY_START_OF_WEEK,
KEY_END_OF_WEEK, KEY_GENERIC_ADD_APPT, KEY_GENERIC_ADD_TODO,
KEY_GENERIC_PREV_DAY, KEY_GENERIC_NEXT_DAY,
KEY_GENERIC_PREV_WEEK, KEY_GENERIC_NEXT_WEEK,
KEY_GENERIC_PREV_MONTH, KEY_GENERIC_NEXT_MONTH,
KEY_GENERIC_PREV_YEAR, KEY_GENERIC_NEXT_YEAR,
KEY_GENERIC_REDRAW, KEY_GENERIC_GOTO_TODAY,
KEY_GENERIC_CONFIG_MENU, KEY_GENERIC_CMD
};
static int bindings_apoint[] = {
KEY_GENERIC_HELP, KEY_GENERIC_QUIT, KEY_GENERIC_SAVE,
KEY_GENERIC_RELOAD, KEY_GENERIC_CHANGE_VIEW,
KEY_GENERIC_IMPORT, KEY_GENERIC_EXPORT, KEY_ADD_ITEM,
KEY_DEL_ITEM, KEY_EDIT_ITEM, KEY_VIEW_ITEM, KEY_PIPE_ITEM,
KEY_GENERIC_REDRAW, KEY_REPEAT_ITEM, KEY_FLAG_ITEM,
KEY_EDIT_NOTE, KEY_VIEW_NOTE, KEY_MOVE_UP, KEY_MOVE_DOWN,
KEY_GENERIC_PREV_DAY, KEY_GENERIC_NEXT_DAY,
KEY_GENERIC_PREV_WEEK, KEY_GENERIC_NEXT_WEEK,
KEY_GENERIC_PREV_MONTH, KEY_GENERIC_NEXT_MONTH,
KEY_GENERIC_PREV_YEAR, KEY_GENERIC_NEXT_YEAR, KEY_GENERIC_GOTO,
KEY_GENERIC_GOTO_TODAY, KEY_GENERIC_CONFIG_MENU,
KEY_GENERIC_ADD_APPT, KEY_GENERIC_ADD_TODO, KEY_GENERIC_COPY,
KEY_GENERIC_PASTE, KEY_GENERIC_CMD
};
static int bindings_todo[] = {
KEY_GENERIC_HELP, KEY_GENERIC_QUIT, KEY_GENERIC_SAVE,
KEY_GENERIC_RELOAD, KEY_GENERIC_CHANGE_VIEW,
KEY_GENERIC_SCROLL_DOWN, KEY_GENERIC_SCROLL_UP,
KEY_GENERIC_IMPORT, KEY_GENERIC_EXPORT, KEY_ADD_ITEM,
KEY_DEL_ITEM, KEY_EDIT_ITEM, KEY_VIEW_ITEM, KEY_PIPE_ITEM,
KEY_FLAG_ITEM, KEY_RAISE_PRIORITY, KEY_LOWER_PRIORITY,
KEY_EDIT_NOTE, KEY_VIEW_NOTE, KEY_MOVE_UP, KEY_MOVE_DOWN,
KEY_GENERIC_PREV_DAY, KEY_GENERIC_NEXT_DAY,
KEY_GENERIC_PREV_WEEK, KEY_GENERIC_NEXT_WEEK,
KEY_GENERIC_PREV_MONTH, KEY_GENERIC_NEXT_MONTH,
KEY_GENERIC_PREV_YEAR, KEY_GENERIC_NEXT_YEAR, KEY_GENERIC_GOTO,
KEY_GENERIC_GOTO_TODAY, KEY_GENERIC_CONFIG_MENU,
KEY_GENERIC_ADD_APPT, KEY_GENERIC_ADD_TODO, KEY_GENERIC_REDRAW,
KEY_GENERIC_CMD
};
enum win active_panel = wins_slctd();
switch (active_panel) {
case CAL:
wins_set_bindings(bindings_cal, ARRAY_SIZE(bindings_cal));
break;
case APP:
wins_set_bindings(bindings_apoint,
ARRAY_SIZE(bindings_apoint));
break;
case TOD:
wins_set_bindings(bindings_todo, ARRAY_SIZE(bindings_todo));
break;
default:
EXIT(_("unknown panel"));
/* NOTREACHED */
}
}
/* Draws the status bar. */
void wins_status_bar(void)
{
int page_base = (KEYS_CMDS_PER_LINE * 2 - 1) * (status_page - 1);
int page_size = KEYS_CMDS_PER_LINE * 2;
keys_display_bindings_bar(win[STA].p, bindings, bindings_size,
page_base, page_size);
}
/* Erase status bar. */
void wins_erase_status_bar(void)
{
erase_window_part(win[STA].p, 0, 0, col, STATUSHEIGHT);
}
/* Update the status bar page number to display other commands. */
void wins_other_status_page(int panel)
{
/*
* Determine the number of completely filled pages of key bindings.
* There are two lines of bindings and KEYS_CMDS_PER_LINE bindings per
* line. On each page (other than the last page), one slot is reserved
* for OtherCmd.
*/
const int slots_per_page = KEYS_CMDS_PER_LINE * 2 - 1;
int max_page = bindings_size / slots_per_page;
/*
* The result of the previous computation might have been rounded down.
* In this case, there are some bindings left. If there is exactly one
* binding left, it can be squashed onto the last page in place of the
* OtherCmd binding. If there are at least two bindings left, we need
* to add another page.
*/
if (bindings_size % slots_per_page > 1)
max_page++;
status_page = (status_page % max_page) + 1;
}
/* Reset the status bar page. */
void wins_reset_status_page(void)
{
status_page = 1;
}
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