gui/qt/paytoedit.py

   1 #!/usr/bin/env python
   2 #
   3 # Electrum - lightweight Bitcoin client
   4 # Copyright (C) 2012 thomasv@gitorious
   5 #
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
  18
  19 from PyQt4.QtCore import *
  20 from PyQt4.QtGui import *
  21
  22 import re
  23 from decimal import Decimal
  24 from electrum import bitcoin
  25
  26 RE_ADDRESS = '[1-9A-HJ-NP-Za-km-z]{26,}'
  27 RE_ALIAS = '(.*?)\s*\<([1-9A-HJ-NP-Za-km-z]{26,})\>'
  28
  29 class PayToEdit(QTextEdit):
  30
  31     def __init__(self, amount_edit):
  32         QTextEdit.__init__(self)
  33         self.amount_edit = amount_edit
  34         self.document().contentsChanged.connect(self.update_size)
  35         self.heightMin = 0
  36         self.heightMax = 150
  37         self.setMinimumHeight(27)
  38         self.setMaximumHeight(27)
  39         #self.setStyleSheet("QTextEdit { border-style:solid; border-width: 1px;}")
  40         self.c = None
  41
  42
  43     def lock_amount(self):
  44         e = self.amount_edit
  45         e.setReadOnly(True)
  46         e.setFrame(False)
  47
  48     def unlock_amount(self):
  49         e = self.amount_edit
  50         e.setReadOnly(False)
  51         e.setFrame(True)
  52
  53
  54     def parse_address_and_amount(self, line):
  55         x, y = line.split(',')
  56         address = self.parse_address(x)
  57         amount = self.parse_amount(y)
  58         return address, amount
  59
  60
  61     def parse_amount(self, x):
  62         p = pow(10, self.amount_edit.decimal_point())
  63         return int( p * Decimal(x.strip()))
  64
  65
  66     def parse_address(self, line):
  67         r = line.strip()
  68         m = re.match('^'+RE_ALIAS+'$', r)
  69         address = m.group(2) if m else r
  70         assert bitcoin.is_address(address)
  71         return address
  72
  73
  74     def check_text(self):
  75         # filter out empty lines
  76         lines = filter( lambda x: x, self.lines())
  77         outputs = []
  78         total = 0
  79
  80         if len(lines) == 1:
  81             try:
  82                 self.payto_address = self.parse_address(lines[0])
  83             except:
  84                 self.payto_address = None
  85
  86             if self.payto_address:
  87                 print "unlock", self.payto_address
  88                 self.unlock_amount()
  89                 return
  90
  91         for line in lines:
  92             try:
  93                 to_address, amount = self.parse_address_and_amount(line)
  94             except:
  95                 continue
  96
  97             outputs.append((to_address, amount))
  98             total += amount
  99
 100         self.outputs = outputs
 101         self.payto_address = None
 102
 103         if total:
 104             self.amount_edit.setAmount(total)
 105         else:
 106             self.amount_edit.setText("")
 107
 108         if total or len(lines)>1:
 109             self.lock_amount()
 110         else:
 111             self.unlock_amount()
 112
 113
 114
 115     def get_outputs(self):
 116
 117         if self.payto_address:
 118
 119             if not bitcoin.is_address(self.payto_address):
 120                 QMessageBox.warning(self, _('Error'), _('Invalid Bitcoin Address') + ':\n' + to_address, _('OK'))
 121                 return
 122
 123             try:
 124                 amount = self.amount_edit.get_amount()
 125             except Exception:
 126                 QMessageBox.warning(self, _('Error'), _('Invalid Amount'), _('OK'))
 127                 return
 128
 129             outputs = [(self.payto_address, amount)]
 130             return outputs
 131
 132         return self.outputs
 133
 134
 135     def lines(self):
 136         return str(self.toPlainText()).split('\n')
 137
 138
 139     def is_multiline(self):
 140         return len(self.lines()) > 1
 141
 142
 143     def update_size(self):
 144         docHeight = self.document().size().height()
 145         if self.heightMin <= docHeight <= self.heightMax:
 146             self.setMinimumHeight(docHeight + 2)
 147             self.setMaximumHeight(docHeight + 2)
 148
 149
 150     def setCompleter(self, completer):
 151         self.c = completer
 152         self.c.setWidget(self)
 153         self.c.setCompletionMode(QCompleter.PopupCompletion)
 154         self.c.activated.connect(self.insertCompletion)
 155
 156
 157     def insertCompletion(self, completion):
 158         if self.c.widget() != self:
 159             return
 160         tc = self.textCursor()
 161         extra = completion.length() - self.c.completionPrefix().length()
 162         tc.movePosition(QTextCursor.Left)
 163         tc.movePosition(QTextCursor.EndOfWord)
 164         tc.insertText(completion.right(extra))
 165         self.setTextCursor(tc)
 166         self.check_text()
 167
 168
 169     def textUnderCursor(self):
 170         tc = self.textCursor()
 171         tc.select(QTextCursor.WordUnderCursor)
 172         return tc.selectedText()
 173
 174
 175     def keyPressEvent(self, e):
 176         if self.c.popup().isVisible():
 177             if e.key() in [Qt.Key_Enter, Qt.Key_Return]:
 178                 e.ignore()
 179                 return
 180
 181         if e.key() in [Qt.Key_Tab]:
 182             e.ignore()
 183             return
 184
 185         if e.key() in [Qt.Key_Down, Qt.Key_Up] and not self.is_multiline():
 186             e.ignore()
 187             return
 188
 189         isShortcut = (e.modifiers() and Qt.ControlModifier) and e.key() == Qt.Key_E
 190
 191         if not self.c or not isShortcut:
 192             QTextEdit.keyPressEvent(self, e)
 193             self.check_text()
 194
 195
 196         ctrlOrShift = e.modifiers() and (Qt.ControlModifier or Qt.ShiftModifier)
 197         if self.c is None or (ctrlOrShift and e.text().isEmpty()):
 198             return
 199
 200         eow = QString("~!@#$%^&*()_+{}|:\"<>?,./;'[]\\-=")
 201         hasModifier = (e.modifiers() != Qt.NoModifier) and not ctrlOrShift;
 202         completionPrefix = self.textUnderCursor()
 203
 204         if not isShortcut and (hasModifier or e.text().isEmpty() or completionPrefix.length() < 1 or eow.contains(e.text().right(1)) ):
 205             self.c.popup().hide()
 206             return
 207
 208         if completionPrefix != self.c.completionPrefix():
 209             self.c.setCompletionPrefix(completionPrefix);
 210             self.c.popup().setCurrentIndex(self.c.completionModel().index(0, 0))
 211
 212         cr = self.cursorRect()
 213         cr.setWidth(self.c.popup().sizeHintForColumn(0) + self.c.popup().verticalScrollBar().sizeHint().width())
 214         self.c.complete(cr)
 215
 216