import dbus
import dbus.service
import dbus.glib

import pygtk
pygtk.require('2.0')
import gtk
import pango

import sugar.util
from sugar.shell.PresenceWindow import PresenceWindow
from sugar.shell.Owner import ShellOwner
from sugar.shell.StartPage import StartPage
from sugar.shell.WindowManager import WindowManager

class ActivityHost(dbus.service.Object):

	def __init__(self, activity_container, activity_name):
		self.activity_name = activity_name
		self.ellipsize_tab = False

		self.activity_container = activity_container
		
		self.activity_id = sugar.util.unique_id()
		
		self.dbus_object_name = "/com/redhat/Sugar/Shell/Activities/%s" % self.activity_id
		
		dbus.service.Object.__init__(self, activity_container.service, self.dbus_object_name)
		self.socket = gtk.Socket()
		self.socket.set_data("sugar-activity", self)
		self.socket.show()
		
		hbox = gtk.HBox(False, 4);

		self.tab_activity_image = gtk.Image()
		self.tab_activity_image.set_from_stock(gtk.STOCK_CONVERT, gtk.ICON_SIZE_MENU)
		hbox.pack_start(self.tab_activity_image)
		#self.tab_activity_image.show()		
		
		self.label_hbox = gtk.HBox(False, 4);
		self.label_hbox.connect("style-set", self.__tab_label_style_set_cb)
		hbox.pack_start(self.label_hbox)

		self.tab_label = gtk.Label(self.activity_name)
		self.tab_label.set_single_line_mode(True)
		self.tab_label.set_alignment(0.0, 0.5)
		self.tab_label.set_padding(0, 0)
		self.tab_label.show()
		
		close_image = gtk.Image()
		close_image.set_from_stock (gtk.STOCK_CLOSE, gtk.ICON_SIZE_MENU)
		close_image.show()
		
		self.tab_close_button = gtk.Button()
		rcstyle = gtk.RcStyle();
		rcstyle.xthickness = rcstyle.ythickness = 0;
		self.tab_close_button.modify_style (rcstyle);
		self.tab_close_button.add(close_image)
		self.tab_close_button.set_relief(gtk.RELIEF_NONE)
		self.tab_close_button.set_focus_on_click(False)
		self.tab_close_button.connect("clicked", self.tab_close_button_clicked)
		
		self.label_hbox.pack_start(self.tab_label)
		self.label_hbox.pack_start(self.tab_close_button, False, False, 0)
		self.label_hbox.show()
		
		hbox.show()
		
		notebook = self.activity_container.notebook
		index = notebook.append_page(self.socket, hbox)
		notebook.set_current_page(index)

	def __close_button_clicked_reply_cb(self):
		pass

	def __close_button_clicked_error_cb(self, error):
		pass
	
	def publish(self):
		self.peer_service.publish()
	
	def tab_close_button_clicked(self, button):
		self.peer_service.close_from_user(reply_handler = self.__close_button_clicked_reply_cb, \
										  error_handler = self.__close_button_clicked_error_cb)

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityHost", \
							 in_signature="", \
							 out_signature="t")
	def get_host_xembed_id(self):
		window_id = self.socket.get_id()
		#print "window_id = %d"%window_id
		return window_id

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityHost", \
			 in_signature="ss", \
			 out_signature="")
	def set_peer_service_name(self, peer_service_name, peer_object_name):
		#print "peer_service_name = %s, peer_object_name = %s"%(peer_service_name, peer_object_name)
		self.__peer_service_name = peer_service_name
		self.__peer_object_name = peer_object_name
		self.peer_service = dbus.Interface(self.activity_container.bus.get_object( \
				self.__peer_service_name, self.__peer_object_name), \
										   "com.redhat.Sugar.Activity")

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityHost", \
			 in_signature="b", \
			 out_signature="")
	def set_ellipsize_tab(self, ellipsize):
		self.ellipsize_tab = True
		self.update_tab_size()

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityHost", \
			 in_signature="b", \
			 out_signature="")
	def set_can_close(self, can_close):
		if can_close:
			self.tab_close_button.show()
		else:
			self.tab_close_button.hide()

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityHost", \
			 in_signature="b", \
			 out_signature="")
	def set_tab_show_icon(self, show_icon):
		if show_icon:
			self.tab_activity_image.show()
		else:
			self.tab_activity_image.hide()

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityHost", \
			 in_signature="b", \
			 out_signature="")
	def set_has_changes(self, has_changes):
		if has_changes:
			attrs = pango.AttrList()
			attrs.insert(pango.AttrForeground(50000, 0, 0, 0, -1))
			attrs.insert(pango.AttrWeight(pango.WEIGHT_BOLD, 0, -1))
			self.tab_label.set_attributes(attrs)
		else:
			self.tab_label.set_attributes(pango.AttrList())

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityHost", \
			 in_signature="s", \
			 out_signature="")
	def set_tab_text(self, text):
		self.tab_label.set_text(text)

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityHost", \
			 in_signature="ayibiiii", \
			 out_signature="")
	def set_tab_icon(self, data, colorspace, has_alpha, bits_per_sample, width, height, rowstride):
	    #print "width=%d, height=%d"%(width, height)
		#print "  data = ", data
		pixstr = ""
		for c in data:
			# Work around for a bug in dbus < 0.61 where integers
			# are not correctly marshalled
			if c < 0: c += 256
			pixstr += chr(c)

		pixbuf = gtk.gdk.pixbuf_new_from_data(pixstr, colorspace, has_alpha, bits_per_sample, width, height, rowstride)
		#print pixbuf
		self.tab_activity_image.set_from_pixbuf(pixbuf)

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityHost", \
						 in_signature="", \
						 out_signature="")
	def shutdown(self):
		#print "shutdown"
		for owner, activity in self.activity_container.activities[:]:
			if activity == self:
				self.activity_container.activities.remove((owner, activity))
				
		for i in range(self.activity_container.notebook.get_n_pages()):
			child = self.activity_container.notebook.get_nth_page(i)
			if child == self.socket:
				#print "found child"
				self.activity_container.notebook.remove_page(i)
				break

		del self

	def get_host_activity_id(self):
		return self.activity_id

	def get_object_path(self):
		return self.dbus_object_name

	def update_tab_size(self):
		if self.ellipsize_tab:
			self.tab_label.set_ellipsize(pango.ELLIPSIZE_END)

			context = self.label_hbox.get_pango_context()
			font_desc = self.label_hbox.style.font_desc
			metrics = context.get_metrics(font_desc, context.get_language())
			char_width = metrics.get_approximate_digit_width()
			[w, h] = self.__get_close_icon_size()
			tab_width = 15 * pango.PIXELS(char_width) + 2 * w
			self.label_hbox.set_size_request(tab_width, -1);
		else:
			self.tab_label.set_ellipsize(pango.ELLIPSIZE_NONE)
			self.label_hbox.set_size_request(-1, -1)

	def __get_close_icon_size(self):
		settings = self.label_hbox.get_settings()
		return gtk.icon_size_lookup_for_settings(settings, gtk.ICON_SIZE_MENU)

	def __tab_label_style_set_cb(self, widget, previous_style):
		[w, h] = self.__get_close_icon_size()
		self.tab_close_button.set_size_request (w + 5, h + 2)
		self.update_tab_size()

class ActivityContainer(dbus.service.Object):

	def __init__(self, service, bus):

		self.activities = []

		self.bus = bus
		self.service = service

		dbus.service.Object.__init__(self, self.service, "/com/redhat/Sugar/Shell/ActivityContainer")
		bus.add_signal_receiver(self.name_owner_changed, dbus_interface = "org.freedesktop.DBus", signal_name = "NameOwnerChanged")

		self.window = gtk.Window()
		self.window.set_title("OLPC Sugar")
		self.notebook = gtk.Notebook()

		tab_label = gtk.Label("Everyone")
		tab_page = StartPage()
		self.notebook.append_page(tab_page, tab_label)
		tab_page.show()

		self.notebook.show()
		self.notebook.connect("switch-page", self.notebook_tab_changed)
		self.window.add(self.notebook)
		
		self.window.connect("destroy", lambda w: gtk.main_quit())
		
		self.current_activity = None

		# Create our owner service
		self._owner = ShellOwner()

	def show(self):
		self.window.show()

	def __focus_reply_cb(self):
		pass

	def __focus_error_cb(self, error):
		pass


	def notebook_tab_changed(self, notebook, page, page_number):
		#print "in notebook_tab_changed"
		#print notebook.get_nth_page(page_number)
		new_activity = notebook.get_nth_page(page_number).get_data("sugar-activity")
		#print " Current activity: ", self.current_activity
		#print " New activity:	 ", new_activity

		if self.current_activity != None:
			if self.has_activity(self.current_activity):
				self.current_activity.peer_service.lost_focus(reply_handler = self.__focus_reply_cb, error_handler = self.__focus_error_cb)
		
		if self.has_activity(new_activity):
			self.current_activity = new_activity

		if self.current_activity != None:
			if self.has_activity(self.current_activity):
				self.current_activity.peer_service.got_focus(reply_handler = self.__focus_reply_cb, error_handler = self.__focus_error_cb)


	def has_activity(self, activity_to_check_for):
		for owner, activity in self.activities[:]:
			if activity_to_check_for == activity:
				return True
		return False
	

	def name_owner_changed(self, service_name, old_service_name, new_service_name):
		#print "in name_owner_changed: svc=%s oldsvc=%s newsvc=%s"%(service_name, old_service_name, new_service_name)
		for owner, activity in self.activities[:]:
			if owner == old_service_name:
				self.activities.remove((owner, activity))
		#self.__print_activities()


	@dbus.service.method("com.redhat.Sugar.Shell.ActivityContainer", \
			 in_signature="s", \
			 out_signature="s", \
			 sender_keyword="sender")
	def add_activity(self, activity_name, sender):
		#print "hello world, activity_name = '%s', sender = '%s'"%(activity_name, sender)
		activity = ActivityHost(self, activity_name)
		self.activities.append((sender, activity))

		self.current_activity = activity

		#self.__print_activities()
		return activity.get_host_activity_id()

	def __print_activities(self):
		print "__print_activities: %d activities registered" % len(self.activities)
		i = 0
		for owner, activity in self.activities:
			print "  %d: owner=%s activity_object_name=%s" % (i, owner, activity.dbus_object_name)
			i += 1

class ConsoleLogger(dbus.service.Object):
	def __init__(self):
		session_bus = dbus.SessionBus()
		bus_name = dbus.service.BusName('com.redhat.Sugar.Logger', bus=session_bus)
		object_path = '/com/redhat/Sugar/Logger'
		dbus.service.Object.__init__(self, bus_name, object_path)

		self._window = gtk.Window()
		self._window.set_title("Console")
		self._window.set_default_size(640, 480)
		self._window.connect("delete_event", lambda w, e: w.hide_on_delete())
		
		self._nb = gtk.Notebook()
		self._window.add(self._nb)
		self._nb.show()
				
		self._consoles = {}

	def set_parent_window(self, window):
		window.connect("key-press-event", self.__key_press_event_cb)
		self._window.connect("key-press-event", self.__key_press_event_cb)
		
	def __key_press_event_cb(self, window, event):
		if event.keyval == gtk.keysyms.d and \
		   event.state & gtk.gdk.CONTROL_MASK:
			if self._window.get_property('visible'):
				self._window.hide()
			else:
				self._window.show()

	def _create_console(self, application):
		sw = gtk.ScrolledWindow()
		sw.set_policy(gtk.POLICY_AUTOMATIC,
					  gtk.POLICY_AUTOMATIC)
		
		console = gtk.TextView()
		console.set_wrap_mode(gtk.WRAP_WORD)
		
		sw.add(console)
		console.show()
		
		self._nb.append_page(sw, gtk.Label(application))
		sw.show()
		
		return console

	@dbus.service.method('com.redhat.Sugar.Logger')
	def log(self, application, message):
		if self._consoles.has_key(application):
			console = self._consoles[application]
		else:
			console = self._create_console(application)
			self._consoles[application] = console
	
		buf = console.get_buffer() 
		buf.insert(buf.get_end_iter(), message)

def main():
	console = ConsoleLogger()

	session_bus = dbus.SessionBus()
	service = dbus.service.BusName("com.redhat.Sugar.Shell", bus=session_bus)

	activity_container = ActivityContainer(service, session_bus)
	activity_container.show()
	
	presence_window = PresenceWindow(activity_container)

	wm = WindowManager(activity_container.window)
	wm.set_width(640, WindowManager.ABSOLUTE)
	wm.set_height(480, WindowManager.ABSOLUTE)
	wm.set_position(WindowManager.CENTER)
	wm.show()
	wm.manage()

	wm = WindowManager(presence_window)
	
	wm.set_width(0.15, WindowManager.SCREEN_RELATIVE)
	wm.set_height(1.0, WindowManager.SCREEN_RELATIVE)
	wm.set_position(WindowManager.LEFT)
	wm.manage()
	
	console.set_parent_window(activity_container.window)

if __name__ == "__main__":
	main()
	try:
		gtk.main()
	except KeyboardInterrupt:
		pass