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#!/usr/bin/env python
#
# Electrum - lightweight Bitcoin client
# Copyright (C) 2012 thomasv@gitorious
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from qrtextedit import ScanQRTextEdit
import re
from decimal import Decimal
from electrum import bitcoin
RE_ADDRESS = '[1-9A-HJ-NP-Za-km-z]{26,}'
RE_ALIAS = '(.*?)\s*\<([1-9A-HJ-NP-Za-km-z]{26,})\>'
frozen_style = "QWidget { background-color:none; border:none;}"
normal_style = "QPlainTextEdit { }"
class PayToEdit(ScanQRTextEdit):
def __init__(self, win):
super(PayToEdit,self).__init__(win=win)
self.amount_edit = win.amount_e
self.document().contentsChanged.connect(self.update_size)
self.heightMin = 0
self.heightMax = 150
self.c = None
self.textChanged.connect(self.check_text)
self.outputs = []
self.errors = []
self.is_pr = False
self.scan_f = self.win.pay_from_URI
self.update_size()
self.payto_address = None
def lock_amount(self):
self.amount_edit.setFrozen(True)
def unlock_amount(self):
self.amount_edit.setFrozen(False)
def setFrozen(self, b):
self.setReadOnly(b)
self.setStyleSheet(frozen_style if b else normal_style)
self.button.setHidden(b)
def setGreen(self):
self.is_pr = True
self.setStyleSheet("QWidget { background-color:#80ff80;}")
def setExpired(self):
self.is_pr = True
self.setStyleSheet("QWidget { background-color:#ffcccc;}")
def parse_address_and_amount(self, line):
x, y = line.split(',')
n = re.match('^SCRIPT\s+([0-9a-fA-F]+)$', x.strip())
if n:
_type = 'script'
address = n.group(1).decode('hex')
amount = self.parse_amount(y)
else:
_type = 'address'
address = self.parse_address(x)
amount = self.parse_amount(y)
return _type, address, amount
def parse_amount(self, x):
p = pow(10, self.amount_edit.decimal_point())
return int( p * Decimal(x.strip()))
def parse_address(self, line):
r = line.strip()
m = re.match('^'+RE_ALIAS+'$', r)
address = m.group(2) if m else r
assert bitcoin.is_address(address)
return address
def check_text(self):
self.errors = []
if self.is_pr:
return
# filter out empty lines
lines = filter( lambda x: x, self.lines())
outputs = []
total = 0
self.payto_address = None
if len(lines) == 1:
try:
self.payto_address = self.parse_address(lines[0])
except:
pass
if self.payto_address:
self.unlock_amount()
return
for i, line in enumerate(lines):
try:
type, to_address, amount = self.parse_address_and_amount(line)
except:
self.errors.append((i, line.strip()))
continue
outputs.append((type, to_address, amount))
total += amount
self.outputs = outputs
self.payto_address = None
if outputs:
self.amount_edit.setAmount(total)
else:
self.amount_edit.setText("")
self.amount_edit.textEdited.emit("")
if total or len(lines)>1:
self.lock_amount()
else:
self.unlock_amount()
def get_errors(self):
return self.errors
def get_outputs(self):
if self.payto_address:
try:
amount = self.amount_edit.get_amount()
except:
amount = None
self.outputs = [('address', self.payto_address, amount)]
return self.outputs[:]
def lines(self):
return str(self.toPlainText()).split('\n')
def is_multiline(self):
return len(self.lines()) > 1
def update_size(self):
docHeight = self.document().size().height()
h = docHeight*17 + 11
if self.heightMin <= h <= self.heightMax:
self.setMinimumHeight(h)
self.setMaximumHeight(h)
self.verticalScrollBar().hide()
def setCompleter(self, completer):
self.c = completer
self.c.setWidget(self)
self.c.setCompletionMode(QCompleter.PopupCompletion)
self.c.activated.connect(self.insertCompletion)
def insertCompletion(self, completion):
if self.c.widget() != self:
return
tc = self.textCursor()
extra = completion.length() - self.c.completionPrefix().length()
tc.movePosition(QTextCursor.Left)
tc.movePosition(QTextCursor.EndOfWord)
tc.insertText(completion.right(extra))
self.setTextCursor(tc)
def textUnderCursor(self):
tc = self.textCursor()
tc.select(QTextCursor.WordUnderCursor)
return tc.selectedText()
def keyPressEvent(self, e):
if self.isReadOnly():
return
if self.c.popup().isVisible():
if e.key() in [Qt.Key_Enter, Qt.Key_Return]:
e.ignore()
return
if e.key() in [Qt.Key_Tab]:
e.ignore()
return
if e.key() in [Qt.Key_Down, Qt.Key_Up] and not self.is_multiline():
e.ignore()
return
QPlainTextEdit.keyPressEvent(self, e)
ctrlOrShift = e.modifiers() and (Qt.ControlModifier or Qt.ShiftModifier)
if self.c is None or (ctrlOrShift and e.text().isEmpty()):
return
eow = QString("~!@#$%^&*()_+{}|:\"<>?,./;'[]\\-=")
hasModifier = (e.modifiers() != Qt.NoModifier) and not ctrlOrShift;
completionPrefix = self.textUnderCursor()
if hasModifier or e.text().isEmpty() or completionPrefix.length() < 1 or eow.contains(e.text().right(1)):
self.c.popup().hide()
return
if completionPrefix != self.c.completionPrefix():
self.c.setCompletionPrefix(completionPrefix);
self.c.popup().setCurrentIndex(self.c.completionModel().index(0, 0))
cr = self.cursorRect()
cr.setWidth(self.c.popup().sizeHintForColumn(0) + self.c.popup().verticalScrollBar().sizeHint().width())
self.c.complete(cr)
def qr_input(self):
data = super(PayToEdit,self).qr_input()
if data.startswith("bitcoin:"):
self.scan_f(data)
# TODO: update fee