# win32clipboardDemo.py
#
# Demo/test of the win32clipboard module.
from win32clipboard import *
from pywin32_testutil import str2bytes # py3k-friendly helper
import win32con
import types

if not __debug__:
    print("WARNING: The test code in this module uses assert")
    print("This instance of Python has asserts disabled, so many tests will be skipped")

cf_names = {}
# Build map of CF_* constants to names.
for name, val in list(win32con.__dict__.items()):
    if name[:3]=="CF_" and name != "CF_SCREENFONTS": # CF_SCREEN_FONTS==CF_TEXT!?!?
        cf_names[val] = name

def TestEmptyClipboard():
    OpenClipboard()
    try:
        EmptyClipboard()
        assert EnumClipboardFormats(0)==0, "Clipboard formats were available after emptying it!"
    finally:
        CloseClipboard()

def TestText():
    OpenClipboard()
    try:
        text = "Hello from Python"
        text_bytes = str2bytes(text)
        SetClipboardText(text)
        got = GetClipboardData(win32con.CF_TEXT)
        # CF_TEXT always gives us 'bytes' back .
        assert  got == text_bytes, "Didnt get the correct result back - '%r'." % (got,)
    finally:
        CloseClipboard()

    OpenClipboard()
    try:
        # CF_UNICODE text always gives unicode objects back.
        got = GetClipboardData(win32con.CF_UNICODETEXT)
        assert  got == text, "Didnt get the correct result back - '%r'." % (got,)
        assert type(got)==str, "Didnt get the correct result back - '%r'." % (got,)

        # CF_OEMTEXT is a bytes-based format.
        got = GetClipboardData(win32con.CF_OEMTEXT)
        assert  got == text_bytes, "Didnt get the correct result back - '%r'." % (got,)

        # Unicode tests
        EmptyClipboard()
        text = "Hello from Python unicode"
        text_bytes = str2bytes(text)
        # Now set the Unicode value
        SetClipboardData(win32con.CF_UNICODETEXT, text)
        # Get it in Unicode.
        got = GetClipboardData(win32con.CF_UNICODETEXT)
        assert  got == text, "Didnt get the correct result back - '%r'." % (got,)
        assert type(got)==str, "Didnt get the correct result back - '%r'." % (got,)

        # Close and open the clipboard to ensure auto-conversions take place.
    finally:
        CloseClipboard()

    OpenClipboard()
    try:

        # Make sure I can still get the text as bytes
        got = GetClipboardData(win32con.CF_TEXT)
        assert  got == text_bytes, "Didnt get the correct result back - '%r'." % (got,)
        # Make sure we get back the correct types.
        got = GetClipboardData(win32con.CF_UNICODETEXT)
        assert type(got)==str, "Didnt get the correct result back - '%r'." % (got,)
        got = GetClipboardData(win32con.CF_OEMTEXT)
        assert  got == text_bytes, "Didnt get the correct result back - '%r'." % (got,)
        print("Clipboard text tests worked correctly")
    finally:
        CloseClipboard()

def TestClipboardEnum():
    OpenClipboard()
    try:
        # Enumerate over the clipboard types
        enum = 0
        while 1:
            enum = EnumClipboardFormats(enum)
            if enum==0:
                break
            assert IsClipboardFormatAvailable(enum), "Have format, but clipboard says it is not available!"
            n = cf_names.get(enum,"")
            if not n:
                try:
                    n = GetClipboardFormatName(enum)
                except error:
                    n = "unknown (%s)" % (enum,)

            print("Have format", n)
        print("Clipboard enumerator tests worked correctly")
    finally:
        CloseClipboard()

class Foo:
    def __init__(self, **kw):
        self.__dict__.update(kw)
    def __cmp__(self, other):
        return cmp(self.__dict__, other.__dict__)
    def __eq__(self, other):
        return self.__dict__==other.__dict__

def TestCustomFormat():
    OpenClipboard()
    try:
        # Just for the fun of it pickle Python objects through the clipboard
        fmt = RegisterClipboardFormat("Python Pickle Format")
        import pickle
        pickled_object = Foo(a=1, b=2, Hi=3)
        SetClipboardData(fmt, pickle.dumps( pickled_object ) )
        # Now read it back.
        data = GetClipboardData(fmt)
        loaded_object = pickle.loads(data)
        assert pickle.loads(data) == pickled_object, "Didnt get the correct data!"

        print("Clipboard custom format tests worked correctly")
    finally:
        CloseClipboard()


if __name__=='__main__':
    TestEmptyClipboard()
    TestText()
    TestCustomFormat()
    TestClipboardEnum()
    # And leave it empty at the end!
    TestEmptyClipboard()
