# Copyright (C) 2009-2010 Mathias Brodala
#
# 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; either version 2, or (at your option)
# any later version.
#
# 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, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

import cairo
import gobject
import gtk
import os

from xl import event, plugins, settings, xdg
from xl.formatter import TrackFormatter
from xl.nls import gettext as _
from xlgui import icons

import minimode_preferences, mmwidgets

MINIMODE = None

def __migrate_fixed_controls():
    """
        Makes sure fixed controls are selected,
        mostly for migration from older versions
    """
    option_name = 'plugin/minimode/selected_controls'

    if settings.MANAGER.has_option(option_name):
        selected_controls = settings.get_option(option_name)

        if not 'restore' in selected_controls:
            selected_controls += ['restore']
            settings.set_option(option_name, selected_controls)

def enable(exaile):
    """
        Enables the mini mode plugin
    """
    __migrate_fixed_controls()

    if exaile.loading:
        event.add_callback(_enable, 'gui_loaded')
    else:
        _enable(None, exaile, None)

def _enable(event, exaile, nothing):
    """
        Handles the deferred enable call
    """
    global MINIMODE
    MINIMODE = MiniMode(exaile)

def disable(exaile):
    """
        Disables the mini mode plugin
    """
    global MINIMODE
    MINIMODE.destroy()
    MINIMODE = None

def get_preferences_pane():
    return minimode_preferences

class MiniMode(gtk.Window):
    """
        A compact mode for Exaile
    """
    def __init__(self, exaile):
        """
            Sets up the mini mode main window and
            options to access it
        """
        gtk.Window.__init__(self)
        self.set_title('Exaile')
        self.set_resizable(False)

        self.exaile = exaile
        self._active = False
        self.defaults = self.exaile.plugins.get_plugin_default_preferences('minimode')
        self.defaults['plugin/minimode/horizontal_position'] = 10
        self.defaults['plugin/minimode/vertical_position'] = 10

        self.formatter = TrackFormatter(
            self.get_option('plugin/minimode/track_title_format')
        )

        self.box = mmwidgets.WidgetBox(spacing=3)
        self.border_frame = gtk.Frame()
        self.border_frame.add(self.box)
        self.add(self.border_frame)

        basedir = os.path.dirname(os.path.abspath(__file__))
        icons.MANAGER.add_stock_from_directory('exaile-minimode',
            os.path.join(basedir, 'icons'))

        self.menuitem = mmwidgets.MenuItem(self.on_menuitem_activate)
        self.exaile.gui.builder.get_object('view_menu').append(self.menuitem)
        self.menuitem.show()

        key, modifier = gtk.accelerator_parse('<Control><Alt>M')
        self.accel_group = gtk.AccelGroup()
        self.menuitem.add_accelerator('activate', self.accel_group,
            key, modifier, gtk.ACCEL_VISIBLE)
        self.exaile.gui.main.window.add_accel_group(self.accel_group)
        self.add_accel_group(self.accel_group)

        self.register_widgets()
        self.update_widgets(self.get_option('plugin/minimode/selected_controls'))
        self.update_position()

        self._configure_id = None
        self._main_visible_toggle_id = None

        self.connect('show', self.on_show)
        self.connect('expose-event', self.on_expose_event)
        self.connect('screen-changed', self.on_screen_changed)
        self.connect('delete-event', self.on_delete_event)
        self.exaile.gui.main.connect('main-visible-toggle',
            self.on_main_visible_toggle)

    def destroy(self):
        """
            Cleans up and hides
            the mini mode window
        """
        if self._configure_id is not None:
            self.disconnect(self._configure_id)
            self._configure_id = None
        if self._main_visible_toggle_id is not None:
            self.disconnect(self._main_visible_toggle_id)
            self._main_visible_toggle_id = None

        self.remove_accel_group(self.accel_group)
        self.exaile.gui.main.window.remove_accel_group(self.accel_group)
        self.exaile.gui.builder.get_object('view_menu').remove(self.menuitem)

        self._active = False
        self._hide()
        self.box.destroy()

        gtk.Window.destroy(self)

    def _hide(self):
        """
            Hides the mini mode window, shows the main window
        """
        if self._active:
            self.hide()
        else:
            if self._configure_id is not None:
                self.disconnect(self._configure_id)
                self._configure_id = None
            self.hide_all()

        self.exaile.gui.main.window.show()

    def _show(self):
        """
            Shows the mini mode window, hides the main window
        """
        self.exaile.gui.main.window.hide()

        if not self._active:
            self.update_window()

        self.show_all()
        if self._configure_id is None:
            self._configure_id = self.connect('configure-event',
                self.on_configure_event)

    def toggle_visible(self):
        """
            Toggles visibility of the mini mode window
        """
        if self.get_property('visible'):
            self._hide()
        else:
            self._show()

    def update_window(self):
        """
            Changes the appearance of the mini mode window
            based on user setting
        """
        for option in self.defaults.keys():
            value = self.get_option(option)

            if option == 'plugin/minimode/always_on_top':
                self.set_keep_above(value)
            elif option == 'plugin/minimode/show_in_panel':
                self.set_property('skip-taskbar-hint', not value)
            elif option == 'plugin/minimode/on_all_desktops':
                if value: self.stick()
                else: self.unstick()
            elif option == 'plugin/minimode/display_window_decorations':
                if value:
                    decoration_type = self.get_option('plugin/minimode/window_decoration_type')

                    if decoration_type == 'full':
                        self.set_decorated(True)
                        self.border_frame.set_shadow_type(gtk.SHADOW_NONE)
                    elif decoration_type == 'simple':
                        self.set_decorated(False)
                        self.border_frame.set_shadow_type(gtk.SHADOW_OUT)
                else:
                    self.set_decorated(False)
                    self.border_frame.set_shadow_type(gtk.SHADOW_NONE)
            elif option == 'plugin/minimode/use_alpha':
                self.unrealize()

                screen = self.get_screen()
                colormap = screen.get_rgba_colormap() or screen.get_rgb_colormap()
                self.set_colormap(colormap)
                self.set_app_paintable(value)

                self.realize()
            elif option == 'plugin/minimode/horizontal_position':
                self.update_position()
            elif option == 'plugin/minimode/vertical_position':
                self.update_position()
            elif option == 'plugin/minimode/selected_controls':
                self.update_widgets(value)
            elif option == 'plugin/minimode/track_title_format':
                self.formatter.set_property('format', value)

    def update_position(self):
        """
            Changes the position of the mini mode window
            based on user setting
        """
        x = self.get_option('plugin/minimode/horizontal_position')
        y = self.get_option('plugin/minimode/vertical_position')
        self.move(int(x), int(y))

    def register_widgets(self):
        """
            Registers all available widget types
        """
        widgets = {
            'previous': (mmwidgets.Button,
                [gtk.STOCK_MEDIA_PREVIOUS, _('Previous Track'),
                    self.on_previous_clicked]),
            'next': (mmwidgets.Button,
                [gtk.STOCK_MEDIA_NEXT, _('Next Track'),
                    self.on_next_clicked]),
            'play_pause': (mmwidgets.PlayPauseButton,
                [self.exaile.player, self.on_play_pause_clicked]),
            'stop': (mmwidgets.StopButton,
                [self.exaile.player, self.exaile.queue]),
            'volume': (mmwidgets.VolumeButton,
                [self.exaile.player, self.on_volume_changed]),
            'restore': (mmwidgets.RestoreButton,
                [self.accel_group, self.on_restore_clicked]),
            'progress_bar': (mmwidgets.ProgressBar,
                [self.exaile.player, self.on_seeked]),
            'track_selector': (mmwidgets.TrackSelector,
                [self.exaile.gui.main, self.exaile.queue, self.formatter,
                 self.on_track_change]),
            'playlist_button': (mmwidgets.PlaylistButton,
                [self.exaile.gui.main, self.exaile.player, self.exaile.queue,
                 self.formatter, self.on_track_change]),
            'progress_button': (mmwidgets.ProgressButton,
                [self.on_track_change, self.on_seeked]),
            'rating': (mmwidgets.RatingWidget, [])
        }

        self.box.register_widgets(widgets)

    def update_widgets(self, ids):
        """
            Adds and removes widgets
        """
        self.box.update_widgets(ids)

    def get_option(self, option):
        """
            Wrapper function, automatically inserts default values
        """
        return settings.get_option(option, self.defaults[option])

    def set_option(self, option, value):
        """
            Wrapper function, automatically inserts default values
            and sets value only if it has changed
        """
        oldvalue = self.get_option(option)
        if value != oldvalue:
            settings.set_option(option, value)

    def on_menuitem_activate(self, menuitem):
        """
            Shows mini mode on activation of a menu item
        """
        self.toggle_visible()
        self._active = not self._active

    def on_previous_clicked(self, button):
        """
            Jumps to the previous track
        """
        self.exaile.queue.prev()

    def on_next_clicked(self, button):
        """
            Jumps to the next track
        """
        self.exaile.queue.next()

    def on_play_pause_clicked(self, button):
        """
            Toggles between playback and pause mode
        """
        if self.exaile.player.is_paused() or self.exaile.player.is_playing():
            self.exaile.player.toggle_pause()
        else:
            self.exaile.queue.play()

    def on_restore_clicked(self, button):
        """
            Hides mini mode on button click
        """
        self.toggle_visible()
        self._active = False

    def on_track_change(self, sender, track):
        """
            Handles changes in track list controls
        """
        if track is not None:
            index = self.exaile.queue.current_playlist.index(track)
            self.exaile.queue.current_playlist.set_current_pos(index)
            self.exaile.queue.play(track)

    def on_seeked(self, progress_bar, position):
        """
            Handles seeking in the progress bar
        """
        self.exaile.player.set_progress(position)

    def on_volume_changed(self, volume_button, value):
        """
            Handles changes to the volume
        """
        settings.set_option('player/volume', value)

    def on_main_visible_toggle(self, main):
        """
            Handles tray icon toggles
        """
        if self._active:
            if self.get_property('visible'):
                self.hide()
            else:
                self.show()
            return True
        return False

    def on_configure_event(self, widget, event):
        """
            Handles movement of the window
        """
        x, y = self.get_position()
        self.set_option('plugin/minimode/horizontal_position', x)
        self.set_option('plugin/minimode/vertical_position', y)

    def on_show(self, widget):
        """
            Updates window size on exposure
        """
        self.resize(*self.size_request())
        self.queue_draw()

    def on_expose_event(self, widget, event):
        """
            Paints the window alpha transparency
        """
        context = widget.window.cairo_create()

        context.rectangle(event.area.x, event.area.y,
            event.area.width, event.area.height)
        context.clip()

        background = widget.style.bg[gtk.STATE_NORMAL]
        opacity = 1 - self.get_option('plugin/minimode/transparency')
        context.set_source_rgba(
            float(background.red) / 256**2,
            float(background.green) / 256**2,
            float(background.blue) / 256**2,
            opacity
        )
        context.set_operator(cairo.OPERATOR_SOURCE)

        context.paint()

    def on_screen_changed(self, widget, event):
        """
            Updates the colormap on screen change
        """
        screen = widget.get_screen()
        colormap = screen.get_rgba_colormap() or screen.get_rgb_colormap()
        self.window.set_colormap(rgbamap)

    def on_delete_event(self, widget, event):
        """
            Closes application on quit
        """
        self.hide()
        self.exaile.gui.main.quit()
        return True

# vim: et sts=4 sw=4