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uinterface.c
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uinterface.c
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/*
* Copyright (c) 2010, 2011 Ryan Flannery <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "uinterface.h"
/* the global user interface object */
uinterface ui;
/*****************************************************************************
* scrollable window stuff
****************************************************************************/
swindow*
swindow_new(int h, int w, int y, int x)
{
swindow *swin = malloc(sizeof(swindow));
if (swin == NULL)
err(1, "swindow_new failed to allocate swin");
swin->w = w;
swin->h = h;
swin->voffset = 0;
swin->hoffset = 0;
swin->crow = 0;
swin->nrows = 0;
swin->cwin = newwin(h, w, y, x);
if (swin->cwin == NULL)
errx(1, "swindow_new: failed to create window");
return swin;
}
void
swindow_resize(swindow *win, int h, int w, int y, int x)
{
wresize(win->cwin, h, w);
mvwin(win->cwin, y, x);
win->w = w;
win->h = h;
if (win->crow >= h)
win->crow = h - 1;
}
void
swindow_free(swindow *win)
{
delwin(win->cwin);
free(win);
}
void
swindow_scroll(swindow *win, Direction d, int n)
{
switch (d) {
case UP:
win->voffset -= n;
if (win->voffset < 0)
win->voffset = 0;
break;
case DOWN:
win->voffset += n;
if (win->voffset >= win->nrows - win->h)
win->voffset = win->nrows - win->h;
if (win->voffset < 0)
win->voffset = 0;
break;
case LEFT:
win->hoffset -= n;
if (win->hoffset < 0)
win->hoffset = 0;
break;
case RIGHT:
win->hoffset += n;
/* NOTE: "overflow" here is handled elsewhere.
* see input_handlers.c, scroll_col()
*/
break;
default:
err(1, "swindow_scroll: bad direction");
}
}
/*****************************************************************************
* UI Create / Resize / Destroy Functions
****************************************************************************/
void
ui_init(int library_width)
{
int lines, cols;
/* ncurses init */
initscr();
raw();
noecho();
nonl();
keypad(stdscr, TRUE);
start_color();
curs_set(0);
ESCDELAY = 0;
refresh();
getmaxyx(stdscr, lines, cols);
/* setup width of library window */
ui.lwidth = library_width;
ui.lhide = false;
/* create the player and command windows */
ui.player = newwin(1, cols, 0, 0);
ui.command = newwin(1, cols, lines - 1, 0);
if (ui.player == NULL || ui.command == NULL)
errx(1, "ui_init: failed to create player/command windows");
/* and the rest */
ui.library = swindow_new(lines - 3, ui.lwidth, 2, 0);
ui.playlist = swindow_new(lines - 3, cols - ui.lwidth - 1, 2, ui.lwidth + 1);
ui.active = ui.library;
}
bool
ui_is_init()
{
return (ui.active != NULL) && !isendwin();
}
void
ui_destroy()
{
/* destroy each window (this also free()'s the mem for each window) */
delwin(ui.player);
delwin(ui.command);
swindow_free(ui.playlist);
if (ui.library != NULL)
swindow_free(ui.library);
/* reset other properties of the ui to sane 'empty' defaults */
ui.player = NULL;
ui.command = NULL;
ui.library = NULL;
ui.playlist = NULL;
ui.active = NULL;
/* end ncurses */
endwin();
}
void
ui_resize()
{
struct winsize ws;
/* get new dimensions and check for changes */
if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) < 0)
err(1, "ui_resize: ioctl failed");
/* can we even handle the new display size? if not, just exit */
if (ws.ws_col < ui.lwidth + 2) {
endwin();
errx(1, "ui_resize: not enough columns to render vitunes nicely");
}
if (ws.ws_row < 4) {
endwin();
errx(1, "ui_resize: not enough rows to render vitunes nicely");
}
/* resize ncurses */
resizeterm(ws.ws_row, ws.ws_col);
/* resize player & command windows */
wresize(ui.player, 1, ws.ws_col);
wresize(ui.command, 1, ws.ws_col);
/* resize library and playlist windows */
if (ui.library->cwin == NULL)
swindow_resize(ui.playlist, ws.ws_row - 3, ws.ws_col, 2, 0);
else {
swindow_resize(ui.library, ws.ws_row - 3, ui.lwidth, 2, 0);
swindow_resize(ui.playlist, ws.ws_row - 3, ws.ws_col - ui.lwidth - 1, 2, ui.lwidth + 1);
}
/* move the command window to the new bottom row */
mvwin(ui.command, ws.ws_row - 1, 0);
}
void
ui_hide_library()
{
int w, h;
/* if already hidden, nothing to do */
if (ui.library->cwin == NULL) return;
/* remove library window */
delwin(ui.library->cwin);
ui.library->cwin = NULL;
/* resize & move playlist window */
getmaxyx(stdscr, h, w);
swindow_resize(ui.playlist, h - 3, w, 2, 0);
}
void
ui_unhide_library()
{
int w, h;
/* if not hidden, nothing to do */
if (ui.library->cwin != NULL) return;
getmaxyx(stdscr, h, w);
/* create library window */
ui.library->cwin = newwin(h - 3, ui.lwidth, 2, 0);
if (ui.library->cwin == NULL)
errx(1, "ui_unhide_library: failed to create newwin");
/* resize & move playlist window */
swindow_resize(ui.playlist, h - 3, w - ui.lwidth - 1, 2, ui.lwidth + 1);
}
void
ui_clear()
{
wclear(ui.player);
wclear(ui.command);
wclear(ui.library->cwin);
wclear(ui.playlist->cwin);
clear();
wrefresh(ui.player);
wrefresh(ui.command);
wrefresh(ui.library->cwin);
wrefresh(ui.playlist->cwin);
refresh(); /* XXX needed? */
}