/*  Audacious - Cross-platform multimedia player
 *  Copyright (C) 2005-2011  Audacious development team.
 *
 *  BMP - Cross-platform multimedia player
 *  Copyright (C) 2003-2004  BMP development team.
 *
 *  Based on XMMS:
 *  Copyright (C) 1998-2003  XMMS development team.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; under version 3 of the License.
 *
 *  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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses>.
 *
 *  The Audacious team does not consider modular code linking to
 *  Audacious or using our public API to be a derived work.
 */

#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>

#include <gdk/gdkkeysyms.h>
#include <gtk/gtk.h>

#include <libaudcore/audstrings.h>
#include <libaudcore/drct.h>
#include <libaudcore/hook.h>
#include <libaudcore/i18n.h>
#include <libaudcore/mainloop.h>
#include <libaudcore/plugins.h>
#include <libaudcore/runtime.h>
#include <libaudgui/libaudgui.h>

#include "actions-mainwin.h"
#include "actions-playlist.h"
#include "dnd.h"
#include "menus.h"
#include "plugin.h"
#include "skins_cfg.h"
#include "equalizer.h"
#include "main.h"
#include "vis-callbacks.h"
#include "playlist.h"
#include "button.h"
#include "hslider.h"
#include "menurow.h"
#include "monostereo.h"
#include "number.h"
#include "playlist-widget.h"
#include "playstatus.h"
#include "textbox.h"
#include "window.h"
#include "vis.h"
#include "util.h"
#include "view.h"

#include "../ui-common/menu-ops.h"

#define SEEK_THRESHOLD 200 /* milliseconds */
#define SEEK_SPEED 50 /* milliseconds per pixel */

class MainWindow : public Window
{
public:
    MainWindow (bool shaded) :
        Window (WINDOW_MAIN, & config.player_x, & config.player_y,
         shaded ? MAINWIN_SHADED_WIDTH : skin.hints.mainwin_width,
         shaded ? MAINWIN_SHADED_HEIGHT : skin.hints.mainwin_height, shaded) {}

private:
    void draw (cairo_t * cr);
    bool button_press (GdkEventButton * event);
    bool scroll (GdkEventScroll * event);
};

Window * mainwin;

Button * mainwin_eq, * mainwin_pl;
TextBox * mainwin_info;
MenuRow * mainwin_menurow;

SkinnedVis * mainwin_vis;
SmallVis * mainwin_svis;

static bool seeking = false;
static int seek_start, seek_time;

static TextBox * locked_textbox = nullptr;
static String locked_old_text;

static QueuedFunc status_message_timeout;
static QueuedFunc mainwin_volume_release_timeout;

static Button * mainwin_menubtn, * mainwin_minimize, * mainwin_shade, * mainwin_close;
static Button * mainwin_shaded_menubtn, * mainwin_shaded_minimize, * mainwin_shaded_shade, * mainwin_shaded_close;

static Button * mainwin_rew, * mainwin_fwd;
static Button * mainwin_eject;
static Button * mainwin_play, * mainwin_pause, * mainwin_stop;
static Button * mainwin_shuffle, * mainwin_repeat;

static TextBox * mainwin_stime_min, * mainwin_stime_sec;
static TextBox * mainwin_rate_text, * mainwin_freq_text, * mainwin_othertext;

static PlayStatus * mainwin_playstatus;
static SkinnedNumber * mainwin_minus_num, * mainwin_10min_num, * mainwin_min_num;
static SkinnedNumber * mainwin_10sec_num, * mainwin_sec_num;
static HSlider * mainwin_position, * mainwin_sposition;

static HSlider * mainwin_volume, * mainwin_balance;
static MonoStereo * mainwin_monostereo;

static Button * mainwin_srew, * mainwin_splay, * mainwin_spause;
static Button * mainwin_sstop, * mainwin_sfwd, * mainwin_seject, * mainwin_about;

static void mainwin_position_motion_cb ();
static void mainwin_position_release_cb ();
static void seek_timeout (void * rewind);

static void format_time (char buf[7], int time, int length)
{
    bool zero = aud_get_bool (nullptr, "leading_zero");
    bool remaining = aud_get_bool ("skins", "show_remaining_time");

    if (remaining && length > 0)
    {
        time = (length - time) / 1000;

        if (time < 60)
            snprintf (buf, 7, zero ? "-00:%02d" : " -0:%02d", time);
        else if (time < 6000)
            snprintf (buf, 7, zero ? "%03d:%02d" : "%3d:%02d", -time / 60, time % 60);
        else
            snprintf (buf, 7, "%3d:%02d", -time / 3600, time / 60 % 60);
    }
    else
    {
        time /= 1000;

        if (time < 6000)
            snprintf (buf, 7, zero ? " %02d:%02d" : " %2d:%02d", time / 60, time % 60);
        else if (time < 60000)
            snprintf (buf, 7, "%3d:%02d", time / 60, time % 60);
        else
            snprintf (buf, 7, "%3d:%02d", time / 3600, time / 60 % 60);
    }
}

static void mainwin_menubtn_cb ()
{
    int x, y;
    mainwin->getPosition (& x, & y);
    menu_popup (UI_MENU_MAIN, x + 6 * config.scale,
     y + MAINWIN_SHADED_HEIGHT * config.scale, false, false, 1, GDK_CURRENT_TIME);
}

static void mainwin_minimize_cb ()
{
    gtk_window_iconify ((GtkWindow *) mainwin->gtk ());
}

static void mainwin_shade_toggle ()
{
    view_set_player_shaded (! aud_get_bool ("skins", "player_shaded"));
}

static void mainwin_lock_info_text (const char * text)
{
    if (! locked_textbox)
    {
        locked_textbox = skin.hints.mainwin_othertext_is_status ? mainwin_othertext : mainwin_info;
        locked_old_text = locked_textbox->get_text ();
    }

    locked_textbox->set_text (text);
}

static void mainwin_release_info_text (void * = nullptr)
{
    if (locked_textbox)
    {
        locked_textbox->set_text (locked_old_text);
        locked_textbox = nullptr;
        locked_old_text = String ();
    }
}

static void set_info_text (TextBox * textbox, const char * text)
{
    if (textbox == locked_textbox)
        locked_old_text = String (text);
    else
        textbox->set_text (text);
}

#define mainwin_set_info_text(t) set_info_text (mainwin_info, (t))
#define mainwin_set_othertext(t) set_info_text (mainwin_othertext, (t))

void mainwin_show_status_message (const char * message)
{
    mainwin_lock_info_text (message);
    status_message_timeout.queue (1000, mainwin_release_info_text, nullptr);
}

static void mainwin_set_song_title (const char * title)
{
    StringBuf buf;

    if (title)
        buf.steal (str_printf (_("%s - Audacious"), title));
    else
        buf.steal (str_copy (_("Audacious")));

    int instance = aud_get_instance ();
    if (instance != 1)
        buf.combine (str_printf (" (%d)", instance));

    mainwin->setWindowTitle ((const char *) buf);
    mainwin_set_info_text (title ? title : "");
}

static void title_change ()
{
    if (aud_drct_get_ready ())
        mainwin_set_song_title (aud_drct_get_title ());
    else
        mainwin_set_song_title ("Buffering ...");
}

static void setup_widget (Widget * widget, int x, int y, bool show)
{
    int width, height;

    /* use get_size_request(), not get_preferred_size() */
    /* get_preferred_size() will return 0x0 for hidden widgets */
    gtk_widget_get_size_request (widget->gtk (), & width, & height);

    width /= config.scale;
    height /= config.scale;

    /* hide widgets that are outside the window boundary */
    if (x < 0 || x + width > skin.hints.mainwin_width ||
     y < 0 || y + height > skin.hints.mainwin_height)
        show = false;

    widget->setVisible (show);
    mainwin->move_widget (false, widget, x, y);
}

void mainwin_refresh_hints ()
{
    const SkinHints * p = & skin.hints;

    mainwin_menurow->setVisible (p->mainwin_menurow_visible);
    mainwin_rate_text->setVisible (p->mainwin_streaminfo_visible);
    mainwin_freq_text->setVisible (p->mainwin_streaminfo_visible);
    mainwin_monostereo->setVisible (p->mainwin_streaminfo_visible);

    mainwin_info->set_width (p->mainwin_text_width);

    setup_widget (mainwin_vis, p->mainwin_vis_x, p->mainwin_vis_y, p->mainwin_vis_visible);
    setup_widget (mainwin_info, p->mainwin_text_x, p->mainwin_text_y, p->mainwin_text_visible);
    setup_widget (mainwin_othertext, p->mainwin_infobar_x, p->mainwin_infobar_y, p->mainwin_othertext_visible);

    bool playing = aud_drct_get_playing ();
    bool can_seek = aud_drct_get_length () > 0;

    setup_widget (mainwin_minus_num, p->mainwin_number_0_x, p->mainwin_number_0_y, playing);
    setup_widget (mainwin_10min_num, p->mainwin_number_1_x, p->mainwin_number_1_y, playing);
    setup_widget (mainwin_min_num, p->mainwin_number_2_x, p->mainwin_number_2_y, playing);
    setup_widget (mainwin_10sec_num, p->mainwin_number_3_x, p->mainwin_number_3_y, playing);
    setup_widget (mainwin_sec_num, p->mainwin_number_4_x, p->mainwin_number_4_y, playing);
    setup_widget (mainwin_position, p->mainwin_position_x, p->mainwin_position_y, can_seek);

    setup_widget (mainwin_playstatus, p->mainwin_playstatus_x, p->mainwin_playstatus_y, true);
    setup_widget (mainwin_volume, p->mainwin_volume_x, p->mainwin_volume_y, true);
    setup_widget (mainwin_balance, p->mainwin_balance_x, p->mainwin_balance_y, true);
    setup_widget (mainwin_rew, p->mainwin_previous_x, p->mainwin_previous_y, true);
    setup_widget (mainwin_play, p->mainwin_play_x, p->mainwin_play_y, true);
    setup_widget (mainwin_pause, p->mainwin_pause_x, p->mainwin_pause_y, true);
    setup_widget (mainwin_stop, p->mainwin_stop_x, p->mainwin_stop_y, true);
    setup_widget (mainwin_fwd, p->mainwin_next_x, p->mainwin_next_y, true);
    setup_widget (mainwin_eject, p->mainwin_eject_x, p->mainwin_eject_y, true);
    setup_widget (mainwin_eq, p->mainwin_eqbutton_x, p->mainwin_eqbutton_y, true);
    setup_widget (mainwin_pl, p->mainwin_plbutton_x, p->mainwin_plbutton_y, true);
    setup_widget (mainwin_shuffle, p->mainwin_shuffle_x, p->mainwin_shuffle_y, true);
    setup_widget (mainwin_repeat, p->mainwin_repeat_x, p->mainwin_repeat_y, true);
    setup_widget (mainwin_about, p->mainwin_about_x, p->mainwin_about_y, true);
    setup_widget (mainwin_minimize, p->mainwin_minimize_x, p->mainwin_minimize_y, true);
    setup_widget (mainwin_shade, p->mainwin_shade_x, p->mainwin_shade_y, true);
    setup_widget (mainwin_close, p->mainwin_close_x, p->mainwin_close_y, true);

    if (aud_get_bool ("skins", "player_shaded"))
        mainwin->resize (MAINWIN_SHADED_WIDTH, MAINWIN_SHADED_HEIGHT);
    else
        mainwin->resize (p->mainwin_width, p->mainwin_height);

    mainwin_vis->set_colors ();
}

/* note that the song info is not translated since it is displayed using
 * the skinned bitmap font, which supports only the English alphabet */
static void mainwin_set_song_info (int bitrate, int samplerate, int channels)
{
    char scratch[32];
    int length;

    if (bitrate > 0)
    {
        if (bitrate < 1000000)
            snprintf (scratch, sizeof scratch, "%3d", bitrate / 1000);
        else
            snprintf (scratch, sizeof scratch, "%2dH", bitrate / 100000);

        mainwin_rate_text->set_text (scratch);
    }
    else
        mainwin_rate_text->set_text (nullptr);

    if (samplerate > 0)
    {
        snprintf (scratch, sizeof scratch, "%2d", samplerate / 1000);
        mainwin_freq_text->set_text (scratch);
    }
    else
        mainwin_freq_text->set_text (nullptr);

    mainwin_monostereo->set_num_channels (channels);

    if (bitrate > 0)
        snprintf (scratch, sizeof scratch, "%d kbps", bitrate / 1000);
    else
        scratch[0] = 0;

    if (samplerate > 0)
    {
        length = strlen (scratch);
        snprintf (scratch + length, sizeof scratch - length, "%s%d kHz", length ?
         ", " : "", samplerate / 1000);
    }

    if (channels > 0)
    {
        length = strlen (scratch);
        snprintf (scratch + length, sizeof scratch - length, "%s%s", length ?
         ", " : "", channels > 2 ? "surround" : channels > 1 ? "stereo" : "mono");
    }

    mainwin_set_othertext (scratch);
}

static void info_change ()
{
    int bitrate, samplerate, channels;
    aud_drct_get_info (bitrate, samplerate, channels);
    mainwin_set_song_info (bitrate, samplerate, channels);
}

static void playback_pause ()
{
    mainwin_playstatus->set_status (STATUS_PAUSE);
}

static void playback_unpause ()
{
    mainwin_playstatus->set_status (STATUS_PLAY);
}

void mainwin_playback_begin ()
{
    mainwin_update_song_info ();

    mainwin_stime_min->show ();
    mainwin_stime_sec->show ();
    mainwin_minus_num->show ();
    mainwin_10min_num->show ();
    mainwin_min_num->show ();
    mainwin_10sec_num->show ();
    mainwin_sec_num->show ();

    if (aud_drct_get_length () > 0)
    {
        mainwin_position->show ();
        mainwin_sposition->show ();
    }

    if (aud_drct_get_paused ())
        playback_pause ();
    else
        playback_unpause ();

    title_change ();
    info_change ();
}

static void mainwin_playback_stop ()
{
    seeking = false;
    timer_remove (TimerRate::Hz10, seek_timeout);

    mainwin_set_song_title (nullptr);

    mainwin_vis->clear ();
    mainwin_svis->clear ();

    mainwin_minus_num->hide ();
    mainwin_10min_num->hide ();
    mainwin_min_num->hide ();
    mainwin_10sec_num->hide ();
    mainwin_sec_num->hide ();
    mainwin_stime_min->hide ();
    mainwin_stime_sec->hide ();
    mainwin_position->hide ();
    mainwin_sposition->hide ();

    mainwin_position->set_pressed (false);
    mainwin_sposition->set_pressed (false);

    /* clear sampling parameter displays */
    mainwin_rate_text->set_text (nullptr);
    mainwin_freq_text->set_text (nullptr);
    mainwin_monostereo->set_num_channels (0);
    mainwin_set_othertext ("");

    mainwin_playstatus->set_status (STATUS_STOP);

    playlistwin_hide_timer();
}

static void repeat_toggled ()
{
    mainwin_repeat->set_active (aud_get_bool (nullptr, "repeat"));
}

static void shuffle_toggled ()
{
    mainwin_shuffle->set_active (aud_get_bool (nullptr, "shuffle"));
}

static void no_advance_toggled ()
{
    if (aud_get_bool (nullptr, "no_playlist_advance"))
        mainwin_show_status_message (_("Single mode."));
    else
        mainwin_show_status_message (_("Playlist mode."));
}

static void stop_after_song_toggled ()
{
    if (aud_get_bool (nullptr, "stop_after_current_song"))
        mainwin_show_status_message (_("Stopping after song."));
}

bool MainWindow::scroll (GdkEventScroll * event)
{
    switch (event->direction)
    {
        case GDK_SCROLL_UP:
            mainwin_set_volume_diff (5);
            break;
        case GDK_SCROLL_DOWN:
            mainwin_set_volume_diff (-5);
            break;
        case GDK_SCROLL_LEFT:
            aud_drct_seek (aud_drct_get_time () - 5000);
            break;
        case GDK_SCROLL_RIGHT:
            aud_drct_seek (aud_drct_get_time () + 5000);
            break;
        default:
            break;
    }

    return true;
}

bool MainWindow::button_press (GdkEventButton * event)
{
    if (event->button == 1 && event->type == GDK_2BUTTON_PRESS &&
     event->window == gtk_widget_get_window (gtk ()) &&
     event->y < 14 * config.scale)
    {
        mainwin_shade_toggle ();
        return true;
    }

    if (event->button == 3 && event->type == GDK_BUTTON_PRESS)
    {
        menu_popup (UI_MENU_MAIN, event->x_root, event->y_root, false, false,
         event->button, event->time);
        return true;
    }

    return Window::button_press (event);
}

static void mainwin_playback_rpress (Button * button, GdkEventButton * event)
{
    menu_popup (UI_MENU_PLAYBACK, event->x_root, event->y_root, false, false,
     event->button, event->time);
}

bool Window::keypress (GdkEventKey * event)
{
    if (playlistwin_list->handle_keypress (event))
        return true;

    switch (event->keyval)
    {
        case GDK_KEY_Left:
        case GDK_KEY_KP_Left:
        case GDK_KEY_KP_7:
            aud_drct_seek (aud_drct_get_time () - 5000);
            break;
        case GDK_KEY_Right:
        case GDK_KEY_KP_Right:
        case GDK_KEY_KP_9:
            aud_drct_seek (aud_drct_get_time () + 5000);
            break;
        case GDK_KEY_KP_4:
            aud_drct_pl_prev ();
            break;
        case GDK_KEY_KP_6:
            aud_drct_pl_next ();
            break;
        case GDK_KEY_KP_Insert:
            audgui_jump_to_track ();
            break;
        case GDK_KEY_space:
            aud_drct_pause ();
            break;
        case GDK_KEY_Tab: /* GtkUIManager does not handle tab, apparently. */
            if (event->state & GDK_SHIFT_MASK)
                pl_prev ();
            else
                pl_next ();

            break;
        case GDK_KEY_ISO_Left_Tab:
            pl_prev ();
            break;
        default:
            return false;
    }

    return true;
}

void mainwin_drag_data_received (GtkWidget * widget, GdkDragContext * context,
 int x, int y, GtkSelectionData * selection_data, unsigned info, unsigned time, void *)
{
    g_return_if_fail (selection_data != nullptr);

    const char * data = (const char *) gtk_selection_data_get_data (selection_data);
    g_return_if_fail (data);

    if (str_has_prefix_nocase (data, "file:///"))
    {
        if (str_has_suffix_nocase (data, ".wsz\r\n") || str_has_suffix_nocase
         (data, ".zip\r\n"))
        {
            on_skin_view_drag_data_received (0, context, x, y, selection_data, info, time, 0);
            return;
        }
    }

    audgui_urilist_open (data);
}

static int time_now ()
{
    struct timeval tv;
    gettimeofday (& tv, nullptr);
    return (tv.tv_sec % (24 * 3600) * 1000 + tv.tv_usec / 1000);
}

static int time_diff (int a, int b)
{
    if (a > 18 * 3600 * 1000 && b < 6 * 3600 * 1000) /* detect midnight */
        b += 24 * 3600 * 1000;
    return (b > a) ? b - a : 0;
}

static void seek_timeout (void * rewind)
{
    int held = time_diff (seek_time, time_now ());
    if (held < SEEK_THRESHOLD)
        return;

    int position;
    if (aud::from_ptr<bool> (rewind))
        position = seek_start - held / SEEK_SPEED;
    else
        position = seek_start + held / SEEK_SPEED;

    position = aud::clamp (position, 0, 219);
    mainwin_position->set_pos (position);
    mainwin_position_motion_cb ();
}

static void seek_press (GdkEventButton * event, bool rewind)
{
    if (event->button != 1 || seeking)
        return;

    seeking = true;
    seek_start = mainwin_position->get_pos ();
    seek_time = time_now ();
    timer_add (TimerRate::Hz10, seek_timeout, aud::to_ptr (rewind));
}

static void seek_release (GdkEventButton * event, bool rewind)
{
    if (event->button != 1 || ! seeking)
        return;

    if (! aud_drct_get_playing () || time_diff (seek_time, time_now ()) <
     SEEK_THRESHOLD)
    {
        if (rewind)
            aud_drct_pl_prev ();
        else
            aud_drct_pl_next ();
    }
    else
        mainwin_position_release_cb ();

    seeking = false;
    timer_remove (TimerRate::Hz10, seek_timeout);
}

static void mainwin_rew_press (Button * button, GdkEventButton * event)
    { seek_press (event, true); }
static void mainwin_rew_release (Button * button, GdkEventButton * event)
    { seek_release (event, true); }
static void mainwin_fwd_press (Button * button, GdkEventButton * event)
    { seek_press (event, false); }
static void mainwin_fwd_release (Button * button, GdkEventButton * event)
    { seek_release (event, false); }

static void mainwin_shuffle_cb (Button * button, GdkEventButton * event)
    { aud_set_bool (nullptr, "shuffle", button->get_active ()); }
static void mainwin_repeat_cb (Button * button, GdkEventButton * event)
    { aud_set_bool (nullptr, "repeat", button->get_active ()); }
static void mainwin_eq_cb (Button * button, GdkEventButton * event)
    { view_set_show_equalizer (button->get_active ()); }
static void mainwin_pl_cb (Button * button, GdkEventButton * event)
    { view_set_show_playlist (button->get_active ()); }

static void mainwin_spos_set_knob ()
{
    int pos = mainwin_sposition->get_pos ();
    int x = (pos < 6) ? 17 : (pos < 9) ? 20 : 23;
    mainwin_sposition->set_knob (x, 36, x, 36);
}

static void mainwin_spos_motion_cb ()
{
    mainwin_spos_set_knob ();

    int pos = mainwin_sposition->get_pos ();
    int length = aud_drct_get_length ();
    int time = (pos - 1) * length / 12;

    char buf[7];
    format_time (buf, time, length);

    mainwin_stime_min->set_text (buf);
    mainwin_stime_sec->set_text (buf + 4);
}

static void mainwin_spos_release_cb ()
{
    mainwin_spos_set_knob ();

    int pos = mainwin_sposition->get_pos ();
    aud_drct_seek (aud_drct_get_length () * (pos - 1) / 12);
}

static void mainwin_position_motion_cb ()
{
    int length = aud_drct_get_length () / 1000;
    int pos = mainwin_position->get_pos ();
    int time = pos * length / 219;

    mainwin_lock_info_text (str_printf (_("Seek to %d:%-2.2d / %d:%-2.2d"),
     time / 60, time % 60, length / 60, length % 60));
}

static void mainwin_position_release_cb ()
{
    int length = aud_drct_get_length ();
    int pos = mainwin_position->get_pos ();
    int time = (int64_t) pos * length / 219;

    aud_drct_seek(time);
    mainwin_release_info_text();
}

void mainwin_adjust_volume_motion (int v)
{
    aud_drct_set_volume_main (v);
    mainwin_lock_info_text (str_printf (_("Volume: %d%%"), v));
}

void mainwin_adjust_volume_release ()
{
    mainwin_release_info_text ();
}

void mainwin_adjust_balance_motion (int b)
{
    aud_drct_set_volume_balance (b);

    if (b < 0)
        mainwin_lock_info_text (str_printf (_("Balance: %d%% left"), -b));
    else if (b == 0)
        mainwin_lock_info_text (_("Balance: center"));
    else
        mainwin_lock_info_text (str_printf (_("Balance: %d%% right"), b));
}

void mainwin_adjust_balance_release ()
{
    mainwin_release_info_text ();
}

static void mainwin_volume_set_frame ()
{
    int pos = mainwin_volume->get_pos ();
    int frame = (pos * 27 + 25) / 51;
    mainwin_volume->set_frame (0, 15 * frame);
}

void mainwin_set_volume_slider (int percent)
{
    mainwin_volume->set_pos ((percent * 51 + 50) / 100);
    mainwin_volume_set_frame ();
}

static void mainwin_volume_motion_cb ()
{
    mainwin_volume_set_frame ();
    int pos = mainwin_volume->get_pos ();
    int vol = (pos * 100 + 25) / 51;

    mainwin_adjust_volume_motion (vol);
    equalizerwin_set_volume_slider (vol);
}

static void mainwin_volume_release_cb ()
{
    mainwin_volume_set_frame ();
    mainwin_adjust_volume_release ();
}

static void mainwin_balance_set_frame ()
{
    int pos = mainwin_balance->get_pos ();
    int frame = (abs (pos - 12) * 27 + 6) / 12;
    mainwin_balance->set_frame (9, 15 * frame);
}

void mainwin_set_balance_slider (int percent)
{
    if (percent > 0)
        mainwin_balance->set_pos (12 + (percent * 12 + 50) / 100);
    else
        mainwin_balance->set_pos (12 + (percent * 12 - 50) / 100);

    mainwin_balance_set_frame ();
}

static void mainwin_balance_motion_cb ()
{
    mainwin_balance_set_frame ();
    int pos = mainwin_balance->get_pos ();

    int bal;
    if (pos > 12)
        bal = ((pos - 12) * 100 + 6) / 12;
    else
        bal = ((pos - 12) * 100 - 6) / 12;

    mainwin_adjust_balance_motion (bal);
    equalizerwin_set_balance_slider (bal);
}

static void mainwin_balance_release_cb ()
{
    mainwin_balance_set_frame ();
    mainwin_adjust_volume_release ();
}

void mainwin_set_volume_diff (int diff)
{
    int vol = aud_drct_get_volume_main ();

    vol = aud::clamp (vol + diff, 0, 100);
    mainwin_adjust_volume_motion (vol);
    mainwin_set_volume_slider (vol);
    equalizerwin_set_volume_slider (vol);

    mainwin_volume_release_timeout.queue (700,
     [] (void *) { mainwin_volume_release_cb (); }, nullptr);
}

void mainwin_mr_change (MenuRowItem i)
{
    switch (i)
    {
        case MENUROW_OPTIONS:
            mainwin_lock_info_text (_("Options Menu"));
            break;
        case MENUROW_ALWAYS:
            if (aud_get_bool ("skins", "always_on_top"))
                mainwin_lock_info_text (_("Disable 'Always On Top'"));
            else
                mainwin_lock_info_text (_("Enable 'Always On Top'"));
            break;
        case MENUROW_FILEINFOBOX:
            mainwin_lock_info_text (_("File Info Box"));
            break;
        case MENUROW_SCALE:
            mainwin_lock_info_text (_("Double Size"));
            break;
        case MENUROW_VISUALIZATION:
            mainwin_lock_info_text (_("Visualizations"));
            break;
        default:
            break;
    }
}

void mainwin_mr_release (MenuRowItem i, GdkEventButton * event)
{
    switch (i)
    {
        case MENUROW_OPTIONS:
            menu_popup (UI_MENU_VIEW, event->x_root, event->y_root, false, false, 1, event->time);
            break;
        case MENUROW_ALWAYS:
            view_set_on_top (! aud_get_bool ("skins", "always_on_top"));
            break;
        case MENUROW_FILEINFOBOX:
            audgui_infowin_show_current ();
            break;
        case MENUROW_SCALE:
            view_set_double_size (! aud_get_bool ("skins", "double_size"));
            break;
        case MENUROW_VISUALIZATION:
            audgui_show_prefs_for_plugin_type (PluginType::Vis);
            break;
        default:
            break;
    }

    mainwin_release_info_text();
}

bool change_timer_mode_cb (GdkEventButton * event)
{
    if (event->type != GDK_BUTTON_PRESS || event->button != 1)
        return false;

    view_set_show_remaining (! aud_get_bool ("skins", "show_remaining_time"));
    return true;
}

static bool mainwin_info_button_press (GdkEventButton * event)
{
    if (event->type == GDK_BUTTON_PRESS && event->button == 3)
    {
        menu_popup (UI_MENU_PLAYBACK, event->x_root, event->y_root, false,
         false, event->button, event->time);
        return true;
    }

    if (event->type == GDK_2BUTTON_PRESS && event->button == 1)
    {
        audgui_infowin_show_current ();
        return true;
    }

    return false;
}

static void mainwin_create_widgets ()
{
    mainwin_menubtn = new Button (9, 9, 0, 0, 0, 9, SKIN_TITLEBAR, SKIN_TITLEBAR);
    mainwin->put_widget (false, mainwin_menubtn, 6, 3);
    mainwin_menubtn->on_release ((ButtonCB) mainwin_menubtn_cb);

    mainwin_minimize = new Button (9, 9, 9, 0, 9, 9, SKIN_TITLEBAR, SKIN_TITLEBAR);
    mainwin->put_widget (false, mainwin_minimize, 244, 3);
    mainwin_minimize->on_release ((ButtonCB) mainwin_minimize_cb);

    mainwin_shade = new Button (9, 9, 0, 18, 9, 18, SKIN_TITLEBAR, SKIN_TITLEBAR);
    mainwin->put_widget (false, mainwin_shade, 254, 3);
    mainwin_shade->on_release ((ButtonCB) mainwin_shade_toggle);

    mainwin_close = new Button (9, 9, 18, 0, 18, 9, SKIN_TITLEBAR, SKIN_TITLEBAR);
    mainwin->put_widget (false, mainwin_close, 264, 3);
    mainwin_close->on_release ((ButtonCB) skins_close);

    mainwin_rew = new Button (23, 18, 0, 0, 0, 18, SKIN_CBUTTONS, SKIN_CBUTTONS);
    mainwin->put_widget (false, mainwin_rew, 16, 88);
    mainwin_rew->on_press (mainwin_rew_press);
    mainwin_rew->on_release (mainwin_rew_release);
    mainwin_rew->on_rpress (mainwin_playback_rpress);

    mainwin_fwd = new Button (22, 18, 92, 0, 92, 18, SKIN_CBUTTONS, SKIN_CBUTTONS);
    mainwin->put_widget (false, mainwin_fwd, 108, 88);
    mainwin_fwd->on_press (mainwin_fwd_press);
    mainwin_fwd->on_release (mainwin_fwd_release);
    mainwin_fwd->on_rpress (mainwin_playback_rpress);

    mainwin_play = new Button (23, 18, 23, 0, 23, 18, SKIN_CBUTTONS, SKIN_CBUTTONS);
    mainwin->put_widget (false, mainwin_play, 39, 88);
    mainwin_play->on_release ((ButtonCB) aud_drct_play);
    mainwin_play->on_rpress (mainwin_playback_rpress);

    mainwin_pause = new Button (23, 18, 46, 0, 46, 18, SKIN_CBUTTONS, SKIN_CBUTTONS);
    mainwin->put_widget (false, mainwin_pause, 62, 88);
    mainwin_pause->on_release ((ButtonCB) aud_drct_pause);
    mainwin_pause->on_rpress (mainwin_playback_rpress);

    mainwin_stop = new Button (23, 18, 69, 0, 69, 18, SKIN_CBUTTONS, SKIN_CBUTTONS);
    mainwin->put_widget (false, mainwin_stop, 85, 88);
    mainwin_stop->on_release ((ButtonCB) aud_drct_stop);
    mainwin_stop->on_rpress (mainwin_playback_rpress);

    mainwin_eject = new Button (22, 16, 114, 0, 114, 16, SKIN_CBUTTONS, SKIN_CBUTTONS);
    mainwin->put_widget (false, mainwin_eject, 136, 89);
    mainwin_eject->on_release ((ButtonCB) action_play_file);

    mainwin_shuffle = new Button (46, 15, 28, 0, 28, 15, 28, 30, 28, 45, SKIN_SHUFREP, SKIN_SHUFREP);
    mainwin->put_widget (false, mainwin_shuffle, 164, 89);
    mainwin_shuffle->set_active (aud_get_bool (nullptr, "shuffle"));
    mainwin_shuffle->on_release (mainwin_shuffle_cb);

    mainwin_repeat = new Button (28, 15, 0, 0, 0, 15, 0, 30, 0, 45, SKIN_SHUFREP, SKIN_SHUFREP);
    mainwin->put_widget (false, mainwin_repeat, 210, 89);
    mainwin_repeat->set_active (aud_get_bool (nullptr, "repeat"));
    mainwin_repeat->on_release (mainwin_repeat_cb);

    mainwin_eq = new Button (23, 12, 0, 61, 46, 61, 0, 73, 46, 73, SKIN_SHUFREP, SKIN_SHUFREP);
    mainwin->put_widget (false, mainwin_eq, 219, 58);
    mainwin_eq->on_release (mainwin_eq_cb);

    mainwin_pl = new Button (23, 12, 23, 61, 69, 61, 23, 73, 69, 73, SKIN_SHUFREP, SKIN_SHUFREP);
    mainwin->put_widget (false, mainwin_pl, 242, 58);
    mainwin_pl->on_release (mainwin_pl_cb);

    String font;
    if (! config.mainwin_use_bitmapfont)
        font = aud_get_str ("skins", "mainwin_font");

    bool shaded = aud_get_bool ("skins", "mainwin_shaded");
    mainwin_info = new TextBox (153, font, ! shaded && config.autoscroll);
    mainwin->put_widget (false, mainwin_info, 112, 27);
    mainwin_info->on_press (mainwin_info_button_press);

    mainwin_othertext = new TextBox (153, nullptr, false);
    mainwin->put_widget (false, mainwin_othertext, 112, 43);

    mainwin_rate_text = new TextBox (15, nullptr, false);
    mainwin->put_widget (false, mainwin_rate_text, 111, 43);

    mainwin_freq_text = new TextBox (10, nullptr, false);
    mainwin->put_widget (false, mainwin_freq_text, 156, 43);

    mainwin_menurow = new MenuRow;
    mainwin->put_widget (false, mainwin_menurow, 10, 22);

    mainwin_volume = new HSlider (0, 51, SKIN_VOLUME, 68, 13, 0, 0, 14, 11, 15, 422, 0, 422);
    mainwin->put_widget (false, mainwin_volume, 107, 57);
    mainwin_volume->on_move (mainwin_volume_motion_cb);
    mainwin_volume->on_release (mainwin_volume_release_cb);

    mainwin_balance = new HSlider (0, 24, SKIN_BALANCE, 38, 13, 9, 0, 14, 11, 15, 422, 0, 422);
    mainwin->put_widget (false, mainwin_balance, 177, 57);
    mainwin_balance->on_move (mainwin_balance_motion_cb);
    mainwin_balance->on_release (mainwin_balance_release_cb);

    mainwin_monostereo = new MonoStereo;
    mainwin->put_widget (false, mainwin_monostereo, 212, 41);

    mainwin_playstatus = new PlayStatus;
    mainwin->put_widget (false, mainwin_playstatus, 24, 28);

    mainwin_minus_num = new SkinnedNumber;
    mainwin->put_widget (false, mainwin_minus_num, 36, 26);

    mainwin_10min_num = new SkinnedNumber;
    mainwin->put_widget (false, mainwin_10min_num, 48, 26);

    mainwin_min_num = new SkinnedNumber;
    mainwin->put_widget (false, mainwin_min_num, 60, 26);

    mainwin_10sec_num = new SkinnedNumber;
    mainwin->put_widget (false, mainwin_10sec_num, 78, 26);

    mainwin_sec_num = new SkinnedNumber;
    mainwin->put_widget (false, mainwin_sec_num, 90, 26);

    mainwin_about = new Button (20, 25);
    mainwin->put_widget (false, mainwin_about, 247, 83);
    mainwin_about->on_release ((ButtonCB) audgui_show_about_window);

    mainwin_vis = new SkinnedVis;
    mainwin->put_widget (false, mainwin_vis, 24, 43);

    mainwin_position = new HSlider (0, 219, SKIN_POSBAR, 248, 10, 0, 0, 29, 10, 248, 0, 278, 0);
    mainwin->put_widget (false, mainwin_position, 16, 72);
    mainwin_position->on_move (mainwin_position_motion_cb);
    mainwin_position->on_release (mainwin_position_release_cb);

    /* shaded */

    mainwin_shaded_menubtn = new Button (9, 9, 0, 0, 0, 9, SKIN_TITLEBAR, SKIN_TITLEBAR);
    mainwin->put_widget (true, mainwin_shaded_menubtn, 6, 3);
    mainwin_shaded_menubtn->on_release ((ButtonCB) mainwin_menubtn_cb);

    mainwin_shaded_minimize = new Button (9, 9, 9, 0, 9, 9, SKIN_TITLEBAR, SKIN_TITLEBAR);
    mainwin->put_widget (true, mainwin_shaded_minimize, 244, 3);
    mainwin_shaded_minimize->on_release ((ButtonCB) mainwin_minimize_cb);

    mainwin_shaded_shade = new Button (9, 9, 0, 27, 9, 27, SKIN_TITLEBAR, SKIN_TITLEBAR);
    mainwin->put_widget (true, mainwin_shaded_shade, 254, 3);
    mainwin_shaded_shade->on_release ((ButtonCB) mainwin_shade_toggle);

    mainwin_shaded_close = new Button (9, 9, 18, 0, 18, 9, SKIN_TITLEBAR, SKIN_TITLEBAR);
    mainwin->put_widget (true, mainwin_shaded_close, 264, 3);
    mainwin_shaded_close->on_release ((ButtonCB) skins_close);

    mainwin_srew = new Button (8, 7);
    mainwin->put_widget (true, mainwin_srew, 169, 4);
    mainwin_srew->on_release ((ButtonCB) aud_drct_pl_prev);

    mainwin_splay = new Button (10, 7);
    mainwin->put_widget (true, mainwin_splay, 177, 4);
    mainwin_splay->on_release ((ButtonCB) aud_drct_play);

    mainwin_spause = new Button (10, 7);
    mainwin->put_widget (true, mainwin_spause, 187, 4);
    mainwin_spause->on_release ((ButtonCB) aud_drct_pause);

    mainwin_sstop = new Button (9, 7);
    mainwin->put_widget (true, mainwin_sstop, 197, 4);
    mainwin_sstop->on_release ((ButtonCB) aud_drct_stop);

    mainwin_sfwd = new Button (8, 7);
    mainwin->put_widget (true, mainwin_sfwd, 206, 4);
    mainwin_sfwd->on_release ((ButtonCB) aud_drct_pl_next);

    mainwin_seject = new Button (9, 7);
    mainwin->put_widget (true, mainwin_seject, 216, 4);
    mainwin_seject->on_release ((ButtonCB) action_play_file);

    mainwin_svis = new SmallVis ();
    mainwin->put_widget (true, mainwin_svis, 79, 5);

    mainwin_sposition = new HSlider (1, 13, SKIN_TITLEBAR, 17, 7, 0, 36, 3, 7, 17, 36, 17, 36);
    mainwin->put_widget (true, mainwin_sposition, 226, 4);
    mainwin_sposition->on_move (mainwin_spos_motion_cb);
    mainwin_sposition->on_release (mainwin_spos_release_cb);

    mainwin_stime_min = new TextBox (15, nullptr, false);
    mainwin->put_widget (true, mainwin_stime_min, 130, 4);
    mainwin_stime_min->on_press (change_timer_mode_cb);

    mainwin_stime_sec = new TextBox (10, nullptr, false);
    mainwin->put_widget (true, mainwin_stime_sec, 147, 4);
    mainwin_stime_sec->on_press (change_timer_mode_cb);
}

static gboolean state_cb (GtkWidget * widget, GdkEventWindowState * event, void *)
{
    if (event->changed_mask & GDK_WINDOW_STATE_STICKY)
        view_set_sticky (!! (event->new_window_state & GDK_WINDOW_STATE_STICKY));

    if (event->changed_mask & GDK_WINDOW_STATE_ABOVE)
        view_set_on_top (!! (event->new_window_state & GDK_WINDOW_STATE_ABOVE));

    return true;
}

void MainWindow::draw (cairo_t * cr)
{
    int width = is_shaded () ? MAINWIN_SHADED_WIDTH : skin.hints.mainwin_width;
    int height = is_shaded () ? MAINWIN_SHADED_HEIGHT : skin.hints.mainwin_height;

    skin_draw_pixbuf (cr, SKIN_MAIN, 0, 0, 0, 0, width, height);
    skin_draw_mainwin_titlebar (cr, is_shaded (), true);
}

static void mainwin_create_window ()
{
    bool shaded = aud_get_bool ("skins", "player_shaded");

    mainwin = new MainWindow (shaded);

    GtkWidget * w = mainwin->gtk ();
    drag_dest_set (w);

    g_signal_connect (w, "drag-data-received", (GCallback) mainwin_drag_data_received, nullptr);
    g_signal_connect (w, "window-state-event", (GCallback) state_cb, nullptr);

    hook_associate ("playback begin", (HookFunction) mainwin_playback_begin, nullptr);
    hook_associate ("playback ready", (HookFunction) mainwin_playback_begin, nullptr);
    hook_associate ("playback seek", (HookFunction) mainwin_update_song_info, nullptr);
    hook_associate ("playback stop", (HookFunction) mainwin_playback_stop, nullptr);
    hook_associate ("playback pause", (HookFunction) playback_pause, nullptr);
    hook_associate ("playback unpause", (HookFunction) playback_unpause, nullptr);
    hook_associate ("title change", (HookFunction) title_change, nullptr);
    hook_associate ("info change", (HookFunction) info_change, nullptr);
    hook_associate ("set repeat", (HookFunction) repeat_toggled, nullptr);
    hook_associate ("set shuffle", (HookFunction) shuffle_toggled, nullptr);
    hook_associate ("set no_playlist_advance", (HookFunction) no_advance_toggled, nullptr);
    hook_associate ("set stop_after_current_song", (HookFunction) stop_after_song_toggled, nullptr);
}

void mainwin_unhook ()
{
    seeking = false;
    timer_remove (TimerRate::Hz10, seek_timeout);

    status_message_timeout.stop ();
    mainwin_volume_release_timeout.stop ();

    hook_dissociate ("playback begin", (HookFunction) mainwin_playback_begin);
    hook_dissociate ("playback ready", (HookFunction) mainwin_playback_begin);
    hook_dissociate ("playback seek", (HookFunction) mainwin_update_song_info);
    hook_dissociate ("playback stop", (HookFunction) mainwin_playback_stop);
    hook_dissociate ("playback pause", (HookFunction) playback_pause);
    hook_dissociate ("playback unpause", (HookFunction) playback_unpause);
    hook_dissociate ("title change", (HookFunction) title_change);
    hook_dissociate ("info change", (HookFunction) info_change);
    hook_dissociate ("set repeat", (HookFunction) repeat_toggled);
    hook_dissociate ("set shuffle", (HookFunction) shuffle_toggled);
    hook_dissociate ("set no_playlist_advance", (HookFunction) no_advance_toggled);
    hook_dissociate ("set stop_after_current_song", (HookFunction) stop_after_song_toggled);

    start_stop_visual (true);

    locked_textbox = nullptr;
    locked_old_text = String ();
}

void mainwin_create ()
{
    mainwin_create_window ();
    mainwin_create_widgets ();
    mainwin_set_song_title (nullptr);
}

static void mainwin_update_volume ()
{
    int volume = aud_drct_get_volume_main ();
    int balance = aud_drct_get_volume_balance ();

    mainwin_set_volume_slider (volume);
    mainwin_set_balance_slider (balance);
    equalizerwin_set_volume_slider (volume);
    equalizerwin_set_balance_slider (balance);
}

static void mainwin_update_time_display (int time, int length)
{
    char scratch[7];
    format_time (scratch, time, length);

    mainwin_minus_num->set (scratch[0]);
    mainwin_10min_num->set (scratch[1]);
    mainwin_min_num->set (scratch[2]);
    mainwin_10sec_num->set (scratch[4]);
    mainwin_sec_num->set (scratch[5]);

    if (! mainwin_sposition->get_pressed ())
    {
        mainwin_stime_min->set_text (scratch);
        mainwin_stime_sec->set_text (scratch + 4);
    }

    playlistwin_set_time (scratch, scratch + 4);
}

static void mainwin_update_time_slider (int time, int length)
{
    mainwin_position->setVisible (length > 0);
    mainwin_sposition->setVisible (length > 0);

    if (length > 0 && ! seeking)
    {
        if (time < length)
        {
            mainwin_position->set_pos (time * (int64_t) 219 / length);
            mainwin_sposition->set_pos (1 + time * (int64_t) 12 / length);
        }
        else
        {
            mainwin_position->set_pos (219);
            mainwin_sposition->set_pos (13);
        }

        mainwin_spos_set_knob ();
    }
}

void mainwin_update_song_info ()
{
    mainwin_update_volume ();

    if (! aud_drct_get_playing ())
        return;

    int time = 0, length = 0;
    if (aud_drct_get_ready ())
    {
        time = aud_drct_get_time ();
        length = aud_drct_get_length ();
    }

    mainwin_update_time_display (time, length);
    mainwin_update_time_slider (time, length);
}
