VultureChecker/EditWhiteListDialog.py

# -*- coding: utf-8 -*-

# Copyright (c) 2015 - 2018 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing the whitelist edit dialog.
"""

from __future__ import unicode_literals

from PyQt5.QtCore import pyqtSlot
from PyQt5.QtWidgets import QDialog, QInputDialog, QLineEdit

from .Ui_EditWhiteListDialog import Ui_EditWhiteListDialog


class EditWhiteListDialog(QDialog, Ui_EditWhiteListDialog):
    """
    Class implementing the whitelist edit dialog.
    """
    def __init__(self, whitelists, parent=None):
        """
        Constructor
        
        @param whitelists dictionary containing the whitelists
        @type dict of list of str
        @param parent reference to the parent widget
        @type QWidget
        """
        super(EditWhiteListDialog, self).__init__(parent)
        self.setupUi(self)
        
        self.__lists = [
            self.classesList,
            self.functionsList,
            self.slotsList,
            self.attributesList,
            self.variablesList,
            self.propertiesList,
            self.patternsList,
        ]
        
        self.classesList.addItems(whitelists["class"])
        self.functionsList.addItems(whitelists["function"])
        self.slotsList.addItems(whitelists["slot"])
        self.attributesList.addItems(whitelists["attribute"])
        self.variablesList.addItems(whitelists["variable"])
        self.propertiesList.addItems(whitelists["property"])
        self.patternsList.addItems(whitelists["__patterns__"])
        
        self.listsWidget.setCurrentIndex(self.listsWidget.count() - 1)
    
    @pyqtSlot()
    def on_patternsList_itemSelectionChanged(self):
        """
        Private slot to react upon a change of selection in the patterns list.
        """
        self.__setButtonEnabledStates()
    
    @pyqtSlot()
    def on_propertiesList_itemSelectionChanged(self):
        """
        Private slot to react upon a change of selection in the properties
        list.
        """
        self.__setButtonEnabledStates()
    
    @pyqtSlot()
    def on_variablesList_itemSelectionChanged(self):
        """
        Private slot to react upon a change of selection in the variables list.
        """
        self.__setButtonEnabledStates()
    
    @pyqtSlot()
    def on_attributesList_itemSelectionChanged(self):
        """
        Private slot to react upon a change of selection in the attributes
        list.
        """
        self.__setButtonEnabledStates()
    
    @pyqtSlot()
    def on_functionsList_itemSelectionChanged(self):
        """
        Private slot to react upon a change of selection in the functions list.
        """
        self.__setButtonEnabledStates()
    
    @pyqtSlot()
    def on_classesList_itemSelectionChanged(self):
        """
        Private slot to react upon a change of selection in the classes list.
        """
        self.__setButtonEnabledStates()
    
    @pyqtSlot()
    def on_slotsList_itemSelectionChanged(self):
        """
        Private slot to react upon a change of selection in the slots list.
        """
        self.__setButtonEnabledStates()
    
    def __isPattern(self, name):
        """
        Private method to check, if a name is a wildcard pattern.
        
        @param name name to be checked
        @type str
        @return flag indicating a wildcard pattern
        @rtype bool
        """
        isPattern = False
        for char in "*?[":
            if char in name:
                isPattern = True
                break
        return isPattern
    
    @pyqtSlot()
    def on_addButton_clicked(self):
        """
        Private slot to add an entry to the current list.
        """
        name, ok = QInputDialog.getText(
            self,
            self.tr("Add Whitelist"),
            self.tr("Enter a name or wildcard pattern to be added to the"
                    " current whitelist:"),
            QLineEdit.Normal)
        if ok and bool(name):
            curr = self.__lists[self.listsWidget.currentIndex()]
            if curr is self.patternsList or self.__isPattern(name):
                self.patternsList.addItem(name)
            else:
                curr.addItem(name)
    
    @pyqtSlot()
    def on_removeButton_clicked(self):
        """
        Private slot to remove the selected entries from the current list.
        """
        curr = self.__lists[self.listsWidget.currentIndex()]
        for itm in curr.selectedItems():
            row = curr.row(itm)
            curr.takeItem(row)
            del itm
    
    @pyqtSlot()
    def on_removeAllButton_clicked(self):
        """
        Private slot to remove all entries from the current list.
        """
        curr = self.__lists[self.listsWidget.currentIndex()]
        curr.clear()
    
    @pyqtSlot(int)
    def on_listsWidget_currentChanged(self, index):
        """
        Private slot handling the selection of tab.
        
        @param index index of the selected tab
        @type int
        """
        self.__setButtonEnabledStates()
    
    def __setButtonEnabledStates(self):
        """
        Private slot to set the state of various buttons.
        """
        curr = self.__lists[self.listsWidget.currentIndex()]
        self.removeButton.setEnabled(len(curr.selectedItems()) > 0)
        self.removeAllButton.setEnabled(curr.count() > 0)
    
    def __getWhiteList(self, listWidget):
        """
        Private method to get the whitelisted names from a list widget.
        
        @param listWidget reference to the list widget
        @type QListWidget
        @return whitelisted names
        @rtype list of str
        """
        whitelist = []
        for row in range(listWidget.count()):
            whitelist.append(listWidget.item(row).text())
        return whitelist
    
    def getWhiteLists(self):
        """
        Public methods to retrieve the various whitelists.
        
        @return dictionary containing the whitelists
        @rtype dict of list of str
        """
        whitelists = {
            "class": self.__getWhiteList(self.classesList),
            "function": self.__getWhiteList(self.functionsList),
            "slot": self.__getWhiteList(self.slotsList),
            "attribute": self.__getWhiteList(self.attributesList),
            "variable": self.__getWhiteList(self.variablesList),
            "property": self.__getWhiteList(self.propertiesList),
            "__patterns__": self.__getWhiteList(self.patternsList),
        }
        return whitelists