#
#		Python GUI - Events - PyObjC version
#

import AppKit
from AppKit import NSEvent, \
    NSShiftKeyMask, NSControlKeyMask, NSCommandKeyMask, NSAlternateKeyMask
import Globals
from GEvents import Event as GEvent

_ns_event_type_to_kind = {
    AppKit.NSLeftMouseDown: 'mouse_down',
    AppKit.NSLeftMouseUp: 'mouse_up',
    AppKit.NSRightMouseDown: 'mouse_down',
    AppKit.NSRightMouseUp: 'mouse_up',
    AppKit.NSOtherMouseDown: 'mouse_down',
    AppKit.NSOtherMouseUp: 'mouse_up',
    AppKit.NSMouseMoved: 'mouse_move',
    AppKit.NSLeftMouseDragged: 'mouse_drag',
    AppKit.NSRightMouseDragged: 'mouse_drag',
    AppKit.NSOtherMouseDragged: 'mouse_drag',
    AppKit.NSMouseEntered: 'mouse_enter',
    AppKit.NSMouseExited: 'mouse_leave',
    AppKit.NSKeyDown: 'key_down',
    AppKit.NSKeyUp: 'key_up',
    AppKit.NSFlagsChanged: 'flags_changed',
    AppKit.NSAppKitDefined: 'app_kit_defined',
    AppKit.NSSystemDefined: 'system_defined',
    AppKit.NSApplicationDefined: 'application_defined',
    AppKit.NSPeriodic: 'periodic',
    AppKit.NSCursorUpdate: 'cursor_update',
}

_ns_event_type_to_button = {
    AppKit.NSLeftMouseDown: 'left',
    AppKit.NSLeftMouseUp: 'left',
    AppKit.NSRightMouseDown: 'right',
    AppKit.NSRightMouseUp: 'right',
    AppKit.NSOtherMouseDown: 'middle',
    AppKit.NSOtherMouseUp: 'middle',
    AppKit.NSLeftMouseDragged: 'left',
    AppKit.NSRightMouseDragged: 'right',
    AppKit.NSOtherMouseDragged: 'middle',
}

_ns_keycode_to_keyname = {
    AppKit.NSUpArrowFunctionKey: 'up_arrow',
    AppKit.NSDownArrowFunctionKey: 'down_arrow',
    AppKit.NSLeftArrowFunctionKey: 'left_arrow',
    AppKit.NSRightArrowFunctionKey: 'right_arrow',
    AppKit.NSF1FunctionKey: 'f1',
    AppKit.NSF2FunctionKey: 'f2',
    AppKit.NSF3FunctionKey: 'f3',
    AppKit.NSF4FunctionKey: 'f4',
    AppKit.NSF5FunctionKey: 'f5',
    AppKit.NSF6FunctionKey: 'f6',
    AppKit.NSF7FunctionKey: 'f7',
    AppKit.NSF8FunctionKey: 'f8',
    AppKit.NSF9FunctionKey: 'f9',
    AppKit.NSF10FunctionKey: 'f10', 
    AppKit.NSF11FunctionKey: 'f11',
    AppKit.NSF12FunctionKey: 'f12',
    AppKit.NSF13FunctionKey: 'f13',
    AppKit.NSF14FunctionKey: 'f14',
    AppKit.NSF15FunctionKey : 'f15',
    AppKit.NSDeleteFunctionKey: 'delete',
    AppKit.NSHomeFunctionKey: 'home',
    AppKit.NSEndFunctionKey: 'end',
    AppKit.NSPageUpFunctionKey: 'page_up',
    AppKit.NSPageDownFunctionKey: 'page_down',
    AppKit.NSClearLineFunctionKey: 'clear',
    #AppKit.NSHelpFunctionKey: 'help',
    AppKit.NSHelpFunctionKey: 'insert',
    "\x03": 'enter',
}

_mouse_events = [
    'mouse_down', 'mouse_drag', 'mouse_up',
    'mouse_move', 'mouse_enter', 'mouse_exit'
]

_key_events = [
    'key_down', 'key_up'
]

_ns_screen_height = None

class Event(GEvent):
    """Platform-dependent modifiers (boolean):
        command            The Macintosh Command key.
        option             The Macintosh Option key.
    """

    global_position = (0, 0)
    position = (0, 0)
    button = ''
    num_clicks = 0
    char = ""
    unichars = ""
    key = ''
    auto = False
    delta = (0, 0)

    def __init__(self, ns_event):
        self._ns_event = ns_event
        _ns_type = ns_event.type()
        kind = _ns_event_type_to_kind[_ns_type]
        self.kind = kind
        self.time = ns_event.timestamp()
        ns_window = ns_event.window()
        is_mouse_event = kind in _mouse_events
        if is_mouse_event:
            ns_win_pos = ns_event.locationInWindow()
            x, y = ns_window.convertBaseToScreen_(ns_win_pos)
        else:
            ns_last_mouse = Globals.ns_last_mouse_moved_event
            if ns_last_mouse:
                ns_window = ns_last_mouse.window()
                if ns_window:
                    ns_win_pos = ns_last_mouse.locationInWindow()
                    x, y = ns_window.convertBaseToScreen_(ns_win_pos)
                else:
                    x, y = ns_last_mouse.locationInWindow()
            else:
                x, y = NSEvent.mouseLocation()
        h = Globals.ns_screen_height
        self.global_position = (x, h - y)
        if is_mouse_event:
            self.button = _ns_event_type_to_button.get(_ns_type, '')
            if kind == 'mouse_down':
                self.num_clicks = ns_event.clickCount()
            self.delta = (ns_event.deltaX(), ns_event.deltaY())
        ns_flags = ns_event.modifierFlags()
        self.shift = self.extend_contig = (ns_flags & NSShiftKeyMask) <> 0
        self.control = (ns_flags & NSControlKeyMask) <> 0
        self.command = self.extend_noncontig = (ns_flags & NSCommandKeyMask) <> 0
        self.option = (ns_flags & NSAlternateKeyMask) <> 0
        if kind in _key_events:
            self.auto = ns_event.isARepeat()
            ns_chars = ns_event.characters()
            #print "Event.__init__: ns_chars =", repr(ns_chars) ###
            self.unichars = ns_chars
            if len(ns_chars) == 1:
                if ns_chars == "\x19" and ns_event.keyCode() == 48:
                    self.char = "\t"
                elif ns_chars <= "\x7e":
                    self.char = str(ns_chars)
                elif ns_chars == "\x7f":
                    self.char = "\x08"
                key = _ns_keycode_to_keyname.get(ns_chars, "")
                self.key = key
                if key == 'enter':
                    self.char = "\r"
                elif key == 'delete':
                    self.char = "\x7f"

    def _platform_modifiers_str(self):
        return " command:%s option:%s" % (self.command, self.option)