# -*- python -*-
'''
xpybar – xmobar replacement written in python
Copyright © 2014, 2015, 2016, 2017  Mattias Andrée (maandree@member.fsf.org)

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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
'''

# A xpybar configuration example when application launchers

import os
import sys
import time

from plugins.image import Image
from plugins.application import Application



OUTPUT, HEIGHT, YPOS, TOP = 0, 24, 24, True


Image.theme_preferences = ['hicolor', 'mate', 'gnome', 'Adwaita', ..., 'ContrastHigh']


class Launcher:
    def __init__(self, icon, *command):
        self.icon = Image(icon, height = HEIGHT, icon = '/' not in icon)
        self.command = list(command)
    def launch(self):
        if os.fork() == 0:
            if os.fork() == 0:
                os.setpgrp()
                os.execvp(self.command[0], self.command)
            sys.exit(0)
    def scroll_up(self):
        pass
    def scroll_down(self):
        pass


class LauncherSet:
    def __init__(self, launchers):
        self.launchers = [Launcher(x[0], *x[1:]) for x in launchers]
        self.current = 0
        self.icon = self.launchers[self.current].icon
    def launch(self):
        self.launchers[self.current].launch()
    def scroll_up(self):
        self.current = (self.current - 1) % len(self.launchers)
        self.icon = self.launchers[self.current].icon
        bar.invalidate()
    def scroll_down(self):
        self.current = (self.current + 1) % len(self.launchers)
        self.icon = self.launchers[self.current].icon
        bar.invalidate()


def desktop(file):
    application = Application(file)
    icon = application.get_setting('Icon')
    command = Application.strip_placeholders(application.get_setting('Exec'))
    return (icon, 'sh', '-c', command)


launchers = [ [ ('accessories-calculator',                         'mate-calc')
              , ('accessories-character-map',                      'mucharmap')
              , ('scanner',                                        'simple-scan')
              , ('meld',                                           'meld')
              ]
            , [ ('dia',                                            'dia')
              , desktop                                           ('inkscape')
              , desktop                                           ('gimp')
              , ('calligrakrita',                                  'krita')
              , ('blender',                                        'blender')
              , ('/usr/share/pixmaps/openscad.png',                'openscad')
              ]
            , [ ('emacs',                                          'emacs')
              , ('audacity',                                       'audacity')
              , ('/usr/share/ardour4/icons/ardour_icon_48px.png',  'ardour4')
              ]
            , [ ('vlc',                                            'vlc')
              , ('deluge',                                         'deluge')
              , ('/usr/share/pixmaps/amule.xpm',                   'amule')
              ]
            , ('claws-mail',                                       'claws-mail')
            , [ ('terminator',                                     'terminator')
              , ('cool-retro-term',                                'cool-retro-term')
              , ('/usr/share/pixmaps/xterm-color_48x48.xpm',       'xterm')
              ]
            ]


launchers = [Launcher(x[0], *x[1:]) if isinstance(x, tuple) else LauncherSet(x) for x in launchers]


start_ = start
def start():
    start_()
    def reaper():
        while True:
            try:
                os.wait()
            except:
                time.sleep(3)
    async(reaper, name = 'reaper')


def redraw():
    bar.clear()
    offset = 0
    for launcher in launchers:
        launcher.icon.draw(bar, offset, 0)
        offset += HEIGHT


LEFT_BUTTON = 1
RIGHT_BUTTON = 3
SCROLL_UP = 4
SCROLL_DOWN = 5


def unhandled_event(e):
    '''
    Invoked when an unrecognised even is polled,
    feel free to replace this completely
    
    @param  e  The event
    '''
    if isinstance(e, Xlib.protocol.event.ButtonPress):
        x = e.event_x // HEIGHT
        button = e.detail
        if 0 <= x < len(launchers):
            if   button == LEFT_BUTTON:   launchers[x].launch()
            elif button == RIGHT_BUTTON:  launchers[x].scroll_down()
            elif button == SCROLL_UP:     launchers[x].scroll_up()
            elif button == SCROLL_DOWN:   launchers[x].scroll_down()


# TODO support for dropping files onto the launchers to open with those files would be nice