# This file is part of Xpra.
# Copyright (C) 2011 Serviware (Arthur Huillet, <ahuillet@serviware.com>)
# Copyright (C) 2010-2019 Antoine Martin <antoine@xpra.org>
# Copyright (C) 2008, 2010 Nathaniel Smith <njs@pobox.com>
# Xpra is released under the terms of the GNU GPL v2, or, at your option, any
# later version. See the file COPYING for details.

from collections import namedtuple
import gtk
from gtk import gdk

from xpra.client.gtk_base.gtk_client_window_base import GTKClientWindowBase, HAS_X11_BINDINGS
from xpra.gtk_common.gtk_util import WINDOW_NAME_TO_HINT, WINDOW_EVENT_MASK, BUTTON_MASK
from xpra.gtk_common.gobject_util import one_arg_signal
from xpra.util import envbool
from xpra.log import Logger

log = Logger("window")
statelog = Logger("state")
eventslog = Logger("events")
drawlog = Logger("draw")

FORCE_IMMEDIATE_PAINT = envbool("XPRA_FORCE_IMMEDIATE_PAINT", False)


DrawEvent = namedtuple("DrawEvent", "area")


GTK2_OR_TYPE_HINTS = (gdk.WINDOW_TYPE_HINT_DIALOG,
                gdk.WINDOW_TYPE_HINT_MENU, gdk.WINDOW_TYPE_HINT_TOOLBAR,
                #gdk.WINDOW_TYPE_HINT_SPLASHSCREEN,
                #gdk.WINDOW_TYPE_HINT_UTILITY,
                gdk.WINDOW_TYPE_HINT_DOCK,
                #gdk.WINDOW_TYPE_HINT_DESKTOP,
                gdk.WINDOW_TYPE_HINT_DROPDOWN_MENU,
                gdk.WINDOW_TYPE_HINT_POPUP_MENU,
                gdk.WINDOW_TYPE_HINT_TOOLTIP,
                #gdk.WINDOW_TYPE_HINT_NOTIFICATION,
                gdk.WINDOW_TYPE_HINT_COMBO,
                gdk.WINDOW_TYPE_HINT_DND)


"""
GTK2 version of the ClientWindow class
"""
class GTK2WindowBase(GTKClientWindowBase):

    #add GTK focus workaround so we will get focus events
    #even when we grab the keyboard:
    __common_gsignals__ = GTKClientWindowBase.__common_gsignals__
    __common_gsignals__.update({
                                "xpra-focus-out-event"  : one_arg_signal,
                                "xpra-focus-in-event"   : one_arg_signal,
                                })

    WINDOW_EVENT_MASK   = WINDOW_EVENT_MASK
    OR_TYPE_HINTS       = GTK2_OR_TYPE_HINTS
    NAME_TO_HINT        = WINDOW_NAME_TO_HINT
    BUTTON_MASK         = BUTTON_MASK

    WINDOW_STATE_FULLSCREEN = gdk.WINDOW_STATE_FULLSCREEN
    WINDOW_STATE_MAXIMIZED  = gdk.WINDOW_STATE_MAXIMIZED
    WINDOW_STATE_ICONIFIED  = gdk.WINDOW_STATE_ICONIFIED
    WINDOW_STATE_ABOVE      = gdk.WINDOW_STATE_ABOVE
    WINDOW_STATE_BELOW      = gdk.WINDOW_STATE_BELOW
    WINDOW_STATE_STICKY     = gdk.WINDOW_STATE_STICKY


    def do_init_window(self, window_type=gtk.WINDOW_TOPLEVEL):
        gtk.Window.__init__(self, window_type)
        # tell KDE/oxygen not to intercept clicks
        # see: https://bugs.kde.org/show_bug.cgi?id=274485
        self.set_data("_kde_no_window_grab", 1)


    def enable_alpha(self):
        screen = self.get_screen()
        rgba = screen.get_rgba_colormap()
        statelog("enable_alpha() rgba colormap=%s", rgba)
        if rgba is None:
            log.error("Error: cannot handle window transparency, no RGBA colormap", exc_info=True)
            return False
        statelog("enable_alpha() using rgba colormap %s for wid %s", rgba, self._id)
        self.set_colormap(rgba)
        return True

    def xget_u32_property(self, target, name):
        try:
            if not HAS_X11_BINDINGS:
                prop = target.property_get(name)
                if not prop or len(prop)!=3 or len(prop[2])!=1:
                    return  None
                log("xget_u32_property(%s, %s)=%s", target, name, prop[2][0])
                return prop[2][0]
        except Exception as e:
            log.error("xget_u32_property error on %s / %s: %s", target, name, e)
        return GTKClientWindowBase.xget_u32_property(self, target, name)

    def is_mapped(self):
        return self.window is not None and self.window.is_visible()

    def get_window_geometry(self):
        gdkwindow = self.get_window()
        x, y = gdkwindow.get_origin()
        w, h = gdkwindow.get_geometry()[2:4]
        return x, y, w, h

    def apply_geometry_hints(self, hints):
        self.set_geometry_hints(None, **hints)


    ######################################################################

    def queue_draw(self, x, y, width, height):
        window = self.get_window()
        drawlog("queue_draw%s window=%s, window offset=%s", (x, y, width, height), window, self.window_offset)
        if not window:
            log.warn("Warning: ignoring draw packet,")
            log.warn(" received for a window which is not realized yet or gone already")
            return
        rect = gdk.Rectangle(x, y, width, height)
        if not FORCE_IMMEDIATE_PAINT:
            window.invalidate_rect(rect, False)
        else:
            #draw directly (bad) to workaround buggy window managers:
            #see: http://xpra.org/trac/ticket/1610
            event = DrawEvent(area=rect)
            self.do_expose_event(event)

    def do_expose_event(self, event):
        #cannot use self
        eventslog("do_expose_event(%s) area=%s", event, event.area)
        backing = self._backing
        if not (self.flags() & gtk.MAPPED) or backing is None:
            return
        w,h = self.window.get_size()
        if w>=32768 or h>=32768:
            log.error("cannot paint on window which is too large: %sx%s !", w, h)
            return
        context = self.window.cairo_create()
        context.rectangle(event.area)
        context.clip()
        self.paint_backing_offset_border(backing, context)
        self.clip_to_backing(backing, context)
        backing.cairo_draw(context)
        self.cairo_paint_border(context, event.area)
        if not self._client.server_ok():
            self.paint_spinner(context, event.area)
