qweechat/input.py

   1 # -*- coding: utf-8 -*-
   2 #
   3 # input.py - input line for chat and debug window
   4 #
   5 # Copyright (C) 2011-2016 Sébastien Helleu <flashcode@flashtux.org>
   6 #
   7 # This file is part of QWeeChat, a Qt remote GUI for WeeChat.
   8 #
   9 # QWeeChat is free software; you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; either version 3 of the License, or
  12 # (at your option) any later version.
  13 #
  14 # QWeeChat is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License
  20 # along with QWeeChat.  If not, see <http://www.gnu.org/licenses/>.
  21 #
  22
  23 import qt_compat
  24
  25 QtCore = qt_compat.import_module('QtCore')
  26 QtGui = qt_compat.import_module('QtGui')
  27
  28
  29 class InputLineEdit(QtGui.QLineEdit):
  30     """Input line."""
  31
  32     bufferSwitchPrev = qt_compat.Signal()
  33     bufferSwitchNext = qt_compat.Signal()
  34     textSent = qt_compat.Signal(str)
  35
  36     def __init__(self, scroll_widget):
  37         QtGui.QLineEdit.__init__(self)
  38         self.scroll_widget = scroll_widget
  39         self._history = []
  40         self._history_index = -1
  41         self.returnPressed.connect(self._input_return_pressed)
  42
  43     def keyPressEvent(self, event):
  44         key = event.key()
  45         modifiers = event.modifiers()
  46         bar = self.scroll_widget.verticalScrollBar()
  47         if modifiers == QtCore.Qt.ControlModifier:
  48             if key == QtCore.Qt.Key_PageUp:
  49                 self.bufferSwitchPrev.emit()
  50             elif key == QtCore.Qt.Key_PageDown:
  51                 self.bufferSwitchNext.emit()
  52             else:
  53                 QtGui.QLineEdit.keyPressEvent(self, event)
  54         elif modifiers == QtCore.Qt.AltModifier:
  55             if key in (QtCore.Qt.Key_Left, QtCore.Qt.Key_Up):
  56                 self.bufferSwitchPrev.emit()
  57             elif key in (QtCore.Qt.Key_Right, QtCore.Qt.Key_Down):
  58                 self.bufferSwitchNext.emit()
  59             elif key == QtCore.Qt.Key_PageUp:
  60                 bar.setValue(bar.value() - (bar.pageStep() / 10))
  61             elif key == QtCore.Qt.Key_PageDown:
  62                 bar.setValue(bar.value() + (bar.pageStep() / 10))
  63             elif key == QtCore.Qt.Key_Home:
  64                 bar.setValue(bar.minimum())
  65             elif key == QtCore.Qt.Key_End:
  66                 bar.setValue(bar.maximum())
  67             else:
  68                 QtGui.QLineEdit.keyPressEvent(self, event)
  69         elif key == QtCore.Qt.Key_PageUp:
  70             bar.setValue(bar.value() - bar.pageStep())
  71         elif key == QtCore.Qt.Key_PageDown:
  72             bar.setValue(bar.value() + bar.pageStep())
  73         elif key == QtCore.Qt.Key_Up:
  74             self._history_navigate(-1)
  75         elif key == QtCore.Qt.Key_Down:
  76             self._history_navigate(1)
  77         else:
  78             QtGui.QLineEdit.keyPressEvent(self, event)
  79
  80     def _input_return_pressed(self):
  81         self._history.append(self.text().encode('utf-8'))
  82         self._history_index = len(self._history)
  83         self.textSent.emit(self.text())
  84         self.clear()
  85
  86     def _history_navigate(self, direction):
  87         if self._history:
  88             self._history_index += direction
  89             if self._history_index < 0:
  90                 self._history_index = 0
  91                 return
  92             if self._history_index > len(self._history) - 1:
  93                 self._history_index = len(self._history)
  94                 self.clear()
  95                 return
  96             self.setText(self._history[self._history_index])