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106 lines
2.9 KiB
106 lines
2.9 KiB
11 years ago
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'''QrScanner Base Abstract implementation
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'''
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__all__ = ('ScannerBase', 'QRScanner')
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from collections import namedtuple
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from kivy.uix.anchorlayout import AnchorLayout
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from kivy.core import core_select_lib
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from kivy.properties import ListProperty, BooleanProperty
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from kivy.factory import Factory
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def encode_uri(addr, amount=0, label='', message='', size='',
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currency='btc'):
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''' Convert to BIP0021 compatible URI
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'''
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uri = 'bitcoin:{}'.format(addr)
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first = True
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if amount:
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uri += '{}amount={}'.format('?' if first else '&', amount)
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first = False
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if label:
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uri += '{}label={}'.format('?' if first else '&', label)
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first = False
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if message:
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uri += '{}?message={}'.format('?' if first else '&', message)
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first = False
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if size:
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uri += '{}size={}'.format('?' if not first else '&', size)
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return uri
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def decode_uri(uri):
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if ':' not in uri:
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# It's just an address (not BIP21)
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return {'address': uri}
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if '//' not in uri:
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# Workaround for urlparse, it don't handle bitcoin: URI properly
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uri = uri.replace(':', '://')
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try:
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uri = urlparse(uri)
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except NameError:
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# delayed import
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from urlparse import urlparse, parse_qs
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uri = urlparse(uri)
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result = {'address': uri.netloc}
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if uri.path.startswith('?'):
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params = parse_qs(uri.path[1:])
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else:
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params = parse_qs(uri.path)
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for k,v in params.items():
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if k in ('amount', 'label', 'message', 'size'):
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result[k] = v[0]
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return result
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class ScannerBase(AnchorLayout):
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''' Base implementation for camera based scanner
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'''
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camera_size = ListProperty([320, 240])
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symbols = ListProperty([])
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# XXX can't work now, due to overlay.
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show_bounds = BooleanProperty(False)
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Qrcode = namedtuple('Qrcode',
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['type', 'data', 'bounds', 'quality', 'count'])
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def start(self):
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pass
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def stop(self):
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pass
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def on_symbols(self, instance, value):
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#if self.show_bounds:
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# self.update_bounds()
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pass
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def update_bounds(self):
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self.canvas.after.remove_group('bounds')
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if not self.symbols:
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return
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with self.canvas.after:
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Color(1, 0, 0, group='bounds')
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for symbol in self.symbols:
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x, y, w, h = symbol.bounds
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x = self._camera.right - x - w
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y = self._camera.top - y - h
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Line(rectangle=[x, y, w, h], group='bounds')
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# load QRCodeDetector implementation
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QRScanner = core_select_lib('qr_scanner', (
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('android', 'scanner_android', 'ScannerAndroid'),
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('camera', 'scanner_camera', 'ScannerCamera')), False, 'electrum_gui.kivy')
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Factory.register('QRScanner', cls=QRScanner)
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