Plugins/VcsPlugins/vcsSubversion/SvnStatusDialog.py

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

# Copyright (c) 2003 - 2012 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing a dialog to show the output of the svn status command
process.
"""

import os

from PyQt4.QtCore import QTimer, QProcess, QRegExp, Qt, pyqtSlot
from PyQt4.QtGui import QWidget, QHeaderView, QLineEdit, QApplication, QMenu, \
    QDialogButtonBox, QTreeWidgetItem

from E5Gui.E5Application import e5App
from E5Gui import E5MessageBox

from .SvnDiffDialog import SvnDiffDialog

from .Ui_SvnStatusDialog import Ui_SvnStatusDialog

import Preferences


class SvnStatusDialog(QWidget, Ui_SvnStatusDialog):
    """
    Class implementing a dialog to show the output of the svn status command
    process.
    """
    def __init__(self, vcs, parent=None):
        """
        Constructor
        
        @param vcs reference to the vcs object
        @param parent parent widget (QWidget)
        """
        super().__init__(parent)
        self.setupUi(self)
        
        self.__toBeCommittedColumn = 0
        self.__changelistColumn = 1
        self.__statusColumn = 2
        self.__propStatusColumn = 3
        self.__lockedColumn = 4
        self.__historyColumn = 5
        self.__switchedColumn = 6
        self.__lockinfoColumn = 7
        self.__upToDateColumn = 8
        self.__pathColumn = 12
        self.__lastColumn = self.statusList.columnCount()
        
        self.refreshButton = \
            self.buttonBox.addButton(self.trUtf8("Refresh"),
                                     QDialogButtonBox.ActionRole)
        self.refreshButton.setToolTip(
            self.trUtf8("Press to refresh the status display"))
        self.refreshButton.setEnabled(False)
        self.buttonBox.button(QDialogButtonBox.Close).setEnabled(False)
        self.buttonBox.button(QDialogButtonBox.Cancel).setDefault(True)
        
        self.diff = None
        self.process = None
        self.vcs = vcs
        self.vcs.committed.connect(self.__committed)
        
        self.statusList.headerItem().setText(self.__lastColumn, "")
        self.statusList.header().setSortIndicator(self.__pathColumn,
                                                  Qt.AscendingOrder)
        if self.vcs.version < (1, 5, 0):
            self.statusList.header().hideSection(self.__changelistColumn)
        
        self.menuactions = []
        self.menu = QMenu()
        self.menuactions.append(self.menu.addAction(
            self.trUtf8("Commit changes to repository..."), self.__commit))
        self.menuactions.append(self.menu.addAction(
            self.trUtf8("Select all for commit"), self.__commitSelectAll))
        self.menuactions.append(self.menu.addAction(
            self.trUtf8("Deselect all from commit"), self.__commitDeselectAll))
        self.menu.addSeparator()
        self.menuactions.append(self.menu.addAction(
            self.trUtf8("Add to repository"), self.__add))
        self.menuactions.append(self.menu.addAction(
            self.trUtf8("Show differences"), self.__diff))
        self.menuactions.append(self.menu.addAction(
            self.trUtf8("Revert changes"), self.__revert))
        self.menuactions.append(self.menu.addAction(
            self.trUtf8("Restore missing"), self.__restoreMissing))
        if self.vcs.version >= (1, 5, 0):
            self.menu.addSeparator()
            self.menuactions.append(self.menu.addAction(
                self.trUtf8("Add to Changelist"), self.__addToChangelist))
            self.menuactions.append(self.menu.addAction(
                self.trUtf8("Remove from Changelist"),
                self.__removeFromChangelist))
        if self.vcs.version >= (1, 2, 0):
            self.menu.addSeparator()
            self.menuactions.append(self.menu.addAction(self.trUtf8("Lock"),
                self.__lock))
            self.menuactions.append(self.menu.addAction(self.trUtf8("Unlock"),
                self.__unlock))
            self.menuactions.append(self.menu.addAction(
                self.trUtf8("Break lock"),
                self.__breakLock))
            self.menuactions.append(self.menu.addAction(
                self.trUtf8("Steal lock"),
                self.__stealLock))
        self.menu.addSeparator()
        self.menuactions.append(self.menu.addAction(
            self.trUtf8("Adjust column sizes"),
            self.__resizeColumns))
        for act in self.menuactions:
            act.setEnabled(False)
        
        self.statusList.setContextMenuPolicy(Qt.CustomContextMenu)
        self.statusList.customContextMenuRequested.connect(
            self.__showContextMenu)
        
        self.modifiedIndicators = [
            self.trUtf8('added'),
            self.trUtf8('deleted'),
            self.trUtf8('modified'),
        ]
        
        self.missingIndicators = [
            self.trUtf8('missing'),
        ]
        
        self.unversionedIndicators = [
            self.trUtf8('unversioned'),
        ]
        
        self.lockedIndicators = [
            self.trUtf8('locked'),
        ]
        
        self.stealBreakLockIndicators = [
            self.trUtf8('other lock'),
            self.trUtf8('stolen lock'),
            self.trUtf8('broken lock'),
        ]
        
        self.unlockedIndicators = [
            self.trUtf8('not locked'),
        ]
        
        self.status = {
            ' ': self.trUtf8('normal'),
            'A': self.trUtf8('added'),
            'D': self.trUtf8('deleted'),
            'M': self.trUtf8('modified'),
            'R': self.trUtf8('replaced'),
            'C': self.trUtf8('conflict'),
            'X': self.trUtf8('external'),
            'I': self.trUtf8('ignored'),
            '?': self.trUtf8('unversioned'),
            '!': self.trUtf8('missing'),
            '~': self.trUtf8('type error'),
        }
        self.propStatus = {
            ' ': self.trUtf8('normal'),
            'M': self.trUtf8('modified'),
            'C': self.trUtf8('conflict'),
        }
        self.locked = {
            ' ': self.trUtf8('no'),
            'L': self.trUtf8('yes'),
        }
        self.history = {
            ' ': self.trUtf8('no'),
            '+': self.trUtf8('yes'),
        }
        self.switched = {
            ' ': self.trUtf8('no'),
            'S': self.trUtf8('yes'),
        }
        self.lockinfo = {
            ' ': self.trUtf8('not locked'),
            'K': self.trUtf8('locked'),
            'O': self.trUtf8('other lock'),
            'T': self.trUtf8('stolen lock'),
            'B': self.trUtf8('broken lock'),
        }
        self.uptodate = {
            ' ': self.trUtf8('yes'),
            '*': self.trUtf8('no'),
        }
        
        self.rx_status = \
            QRegExp('(.{8})\\s+([0-9-]+)\\s+([0-9?]+)\\s+([\\w?]+)\\s+(.+)\\s*')
            # flags (8 anything), revision, changed rev, author, path
        self.rx_status2 = \
            QRegExp('(.{8})\\s+(.+)\\s*')
            # flags (8 anything), path
        self.rx_changelist = \
            QRegExp('--- \\S+ .([\\w\\s]+).:\\s+')
            # three dashes, Changelist (translated), quote,
            # changelist name, quote, :
        
        self.__nonverbose = True
        
    def __resort(self):
        """
        Private method to resort the tree.
        """
        self.statusList.sortItems(self.statusList.sortColumn(),
            self.statusList.header().sortIndicatorOrder())
        
    def __resizeColumns(self):
        """
        Private method to resize the list columns.
        """
        self.statusList.header().resizeSections(QHeaderView.ResizeToContents)
        self.statusList.header().setStretchLastSection(True)
        
    def __generateItem(self, status, propStatus, locked, history, switched,
                       lockinfo, uptodate, revision, change, author, path):
        """
        Private method to generate a status item in the status list.
        
        @param status status indicator (string)
        @param propStatus property status indicator (string)
        @param locked locked indicator (string)
        @param history history indicator (string)
        @param switched switched indicator (string)
        @param lockinfo lock indicator (string)
        @param uptodate up to date indicator (string)
        @param revision revision string (string)
        @param change revision of last change (string)
        @param author author of the last change (string)
        @param path path of the file or directory (string)
        """
        if self.__nonverbose and \
           status == " " and \
           propStatus == " " and \
           locked == " " and \
           history == " " and \
           switched == " " and \
           lockinfo == " " and \
           uptodate == " " and \
           self.currentChangelist == "":
            return
        
        statusText = self.status[status]
        itm = QTreeWidgetItem(self.statusList, [
            self.currentChangelist,
            statusText,
            self.propStatus[propStatus],
            self.locked[locked],
            self.history[history],
            self.switched[switched],
            self.lockinfo[lockinfo],
            self.uptodate[uptodate],
            "{0:7}".format(str(revision)),
            "{0:7}".format(str(change)),
            author,
            path,
        ])
        
        itm.setTextAlignment(1, Qt.AlignLeft)
        itm.setTextAlignment(2, Qt.AlignHCenter)
        itm.setTextAlignment(3, Qt.AlignHCenter)
        itm.setTextAlignment(4, Qt.AlignHCenter)
        itm.setTextAlignment(5, Qt.AlignHCenter)
        itm.setTextAlignment(6, Qt.AlignHCenter)
        itm.setTextAlignment(7, Qt.AlignHCenter)
        itm.setTextAlignment(8, Qt.AlignHCenter)
        itm.setTextAlignment(9, Qt.AlignRight)
        itm.setTextAlignment(10, Qt.AlignRight)
        itm.setTextAlignment(11, Qt.AlignLeft)
        itm.setTextAlignment(12, Qt.AlignLeft)
        
        if status in "ADM" or propStatus in "M":
            itm.setFlags(itm.flags() | Qt.ItemIsUserCheckable)
            itm.setCheckState(self.__toBeCommittedColumn, Qt.Checked)
        else:
            itm.setFlags(itm.flags() & ~Qt.ItemIsUserCheckable)
        
        self.hidePropertyStatusColumn = self.hidePropertyStatusColumn and \
            propStatus == " "
        self.hideLockColumns = self.hideLockColumns and \
            locked == " " and lockinfo == " "
        self.hideUpToDateColumn = self.hideUpToDateColumn and uptodate == " "
        self.hideHistoryColumn = self.hideHistoryColumn and history == " "
        self.hideSwitchedColumn = self.hideSwitchedColumn and switched == " "
        
        if statusText not in self.__statusFilters:
            self.__statusFilters.append(statusText)
        
    def closeEvent(self, e):
        """
        Private slot implementing a close event handler.
        
        @param e close event (QCloseEvent)
        """
        if self.process is not None and \
           self.process.state() != QProcess.NotRunning:
            self.process.terminate()
            QTimer.singleShot(2000, self.process.kill)
            self.process.waitForFinished(3000)
        
        e.accept()
        
    def start(self, fn):
        """
        Public slot to start the svn status command.
        
        @param fn filename(s)/directoryname(s) to show the status of
            (string or list of strings)
        """
        self.errorGroup.hide()
        self.intercept = False
        self.args = fn
        
        for act in self.menuactions:
            act.setEnabled(False)
        
        self.addButton.setEnabled(False)
        self.commitButton.setEnabled(False)
        self.diffButton.setEnabled(False)
        self.revertButton.setEnabled(False)
        self.restoreButton.setEnabled(False)
        
        self.statusFilterCombo.clear()
        self.__statusFilters = []
        
        self.currentChangelist = ""
        self.changelistFound = False
        
        self.hidePropertyStatusColumn = True
        self.hideLockColumns = True
        self.hideUpToDateColumn = True
        self.hideHistoryColumn = True
        self.hideSwitchedColumn = True
        
        if self.process:
            self.process.kill()
        else:
            self.process = QProcess()
            self.process.finished.connect(self.__procFinished)
            self.process.readyReadStandardOutput.connect(self.__readStdout)
            self.process.readyReadStandardError.connect(self.__readStderr)
        
        args = []
        args.append('status')
        self.vcs.addArguments(args, self.vcs.options['global'])
        self.vcs.addArguments(args, self.vcs.options['status'])
        if '--verbose' not in self.vcs.options['global'] and \
           '--verbose' not in self.vcs.options['status']:
            args.append('--verbose')
            self.__nonverbose = True
        else:
            self.__nonverbose = False
        if '--show-updates' in self.vcs.options['status'] or \
           '-u' in self.vcs.options['status']:
            self.activateWindow()
            self.raise_()
        if isinstance(fn, list):
            self.dname, fnames = self.vcs.splitPathList(fn)
            self.vcs.addArguments(args, fnames)
        else:
            self.dname, fname = self.vcs.splitPath(fn)
            args.append(fname)
        
        self.process.setWorkingDirectory(self.dname)
        
        self.setWindowTitle(self.trUtf8('Subversion Status'))
        
        self.process.start('svn', args)
        procStarted = self.process.waitForStarted()
        if not procStarted:
            self.inputGroup.setEnabled(False)
            E5MessageBox.critical(self,
                self.trUtf8('Process Generation Error'),
                self.trUtf8(
                    'The process {0} could not be started. '
                    'Ensure, that it is in the search path.'
                ).format('svn'))
        else:
            self.inputGroup.setEnabled(True)
        
    def __finish(self):
        """
        Private slot called when the process finished or the user pressed
        the button.
        """
        if self.process is not None and \
           self.process.state() != QProcess.NotRunning:
            self.process.terminate()
            QTimer.singleShot(2000, self.process.kill)
            self.process.waitForFinished(3000)
        
        self.buttonBox.button(QDialogButtonBox.Close).setEnabled(True)
        self.buttonBox.button(QDialogButtonBox.Cancel).setEnabled(False)
        self.buttonBox.button(QDialogButtonBox.Close).setDefault(True)
        
        self.inputGroup.setEnabled(False)
        self.refreshButton.setEnabled(True)
        
        self.__statusFilters.sort()
        self.__statusFilters.insert(0, "<{0}>".format(self.trUtf8("all")))
        self.statusFilterCombo.addItems(self.__statusFilters)
        
        for act in self.menuactions:
            act.setEnabled(True)
        
        self.process = None
        
        self.__resort()
        self.__resizeColumns()
        
        self.statusList.setColumnHidden(self.__changelistColumn,
                                        not self.changelistFound)
        self.statusList.setColumnHidden(self.__propStatusColumn,
                                        self.hidePropertyStatusColumn)
        self.statusList.setColumnHidden(self.__lockedColumn,
                                        self.hideLockColumns)
        self.statusList.setColumnHidden(self.__lockinfoColumn,
                                        self.hideLockColumns)
        self.statusList.setColumnHidden(self.__upToDateColumn,
                                        self.hideUpToDateColumn)
        self.statusList.setColumnHidden(self.__historyColumn,
                                        self.hideHistoryColumn)
        self.statusList.setColumnHidden(self.__switchedColumn,
                                        self.hideSwitchedColumn)
        
        self.__updateButtons()
        self.__updateCommitButton()
        
    def on_buttonBox_clicked(self, button):
        """
        Private slot called by a button of the button box clicked.
        
        @param button button that was clicked (QAbstractButton)
        """
        if button == self.buttonBox.button(QDialogButtonBox.Close):
            self.close()
        elif button == self.buttonBox.button(QDialogButtonBox.Cancel):
            self.__finish()
        elif button == self.refreshButton:
            self.on_refreshButton_clicked()
        
    def __procFinished(self, exitCode, exitStatus):
        """
        Private slot connected to the finished signal.
        
        @param exitCode exit code of the process (integer)
        @param exitStatus exit status of the process (QProcess.ExitStatus)
        """
        self.__finish()
        
    def __readStdout(self):
        """
        Private slot to handle the readyReadStandardOutput signal.
        
        It reads the output of the process, formats it and inserts it into
        the contents pane.
        """
        if self.process is not None:
            self.process.setReadChannel(QProcess.StandardOutput)
            
            while self.process.canReadLine():
                s = str(self.process.readLine(),
                        Preferences.getSystem("IOEncoding"),
                        'replace')
                if self.rx_status.exactMatch(s):
                    flags = self.rx_status.cap(1)
                    rev = self.rx_status.cap(2)
                    change = self.rx_status.cap(3)
                    author = self.rx_status.cap(4)
                    path = self.rx_status.cap(5).strip()
                    
                    self.__generateItem(flags[0], flags[1], flags[2], flags[3],
                                        flags[4], flags[5], flags[7], rev,
                                        change, author, path)
                elif self.rx_status2.exactMatch(s):
                    flags = self.rx_status2.cap(1)
                    path = self.rx_status2.cap(2).trimmed()
                    
                    self.__generateItem(flags[0], flags[1], flags[2], flags[3],
                                        flags[4], flags[5], flags[7], "", "",
                                        "", path)
                elif self.rx_changelist.exactMatch(s):
                    self.currentChangelist = self.rx_changelist.cap(1)
                    self.changelistFound = True
        
    def __readStderr(self):
        """
        Private slot to handle the readyReadStandardError signal.
        
        It reads the error output of the process and inserts it into the
        error pane.
        """
        if self.process is not None:
            self.errorGroup.show()
            s = str(self.process.readAllStandardError(),
                    Preferences.getSystem("IOEncoding"),
                    'replace')
            self.errors.insertPlainText(s)
            self.errors.ensureCursorVisible()
        
    def on_passwordCheckBox_toggled(self, isOn):
        """
        Private slot to handle the password checkbox toggled.
        
        @param isOn flag indicating the status of the check box (boolean)
        """
        if isOn:
            self.input.setEchoMode(QLineEdit.Password)
        else:
            self.input.setEchoMode(QLineEdit.Normal)
        
    @pyqtSlot()
    def on_sendButton_clicked(self):
        """
        Private slot to send the input to the subversion process.
        """
        input = self.input.text()
        input += os.linesep
        
        if self.passwordCheckBox.isChecked():
            self.errors.insertPlainText(os.linesep)
            self.errors.ensureCursorVisible()
        else:
            self.errors.insertPlainText(input)
            self.errors.ensureCursorVisible()
        
        self.process.write(input)
        
        self.passwordCheckBox.setChecked(False)
        self.input.clear()
        
    def on_input_returnPressed(self):
        """
        Private slot to handle the press of the return key in the input field.
        """
        self.intercept = True
        self.on_sendButton_clicked()
        
    def keyPressEvent(self, evt):
        """
        Protected slot to handle a key press event.
        
        @param evt the key press event (QKeyEvent)
        """
        if self.intercept:
            self.intercept = False
            evt.accept()
            return
        super().keyPressEvent(evt)
        
    @pyqtSlot()
    def on_refreshButton_clicked(self):
        """
        Private slot to refresh the status display.
        """
        self.buttonBox.button(QDialogButtonBox.Close).setEnabled(False)
        self.buttonBox.button(QDialogButtonBox.Cancel).setEnabled(True)
        self.buttonBox.button(QDialogButtonBox.Cancel).setDefault(True)
        
        self.inputGroup.setEnabled(True)
        self.refreshButton.setEnabled(False)
        
        self.statusList.clear()
        
        self.start(self.args)
        
    def __updateButtons(self):
        """
        Private method to update the VCS buttons status.
        """
        modified = len(self.__getModifiedItems())
        unversioned = len(self.__getUnversionedItems())
        missing = len(self.__getMissingItems())

        self.addButton.setEnabled(unversioned)
        self.diffButton.setEnabled(modified)
        self.revertButton.setEnabled(modified)
        self.restoreButton.setEnabled(missing)
    
    def __updateCommitButton(self):
        """
        Private method to update the Commit button status.
        """
        commitable = len(self.__getCommitableItems())
        self.commitButton.setEnabled(commitable)
    
    @pyqtSlot(str)
    def on_statusFilterCombo_activated(self, txt):
        """
        Private slot to react to the selection of a status filter.
        
        @param txt selected status filter (string)
        """
        if txt == "<{0}>".format(self.trUtf8("all")):
            for topIndex in range(self.statusList.topLevelItemCount()):
                topItem = self.statusList.topLevelItem(topIndex)
                topItem.setHidden(False)
        else:
            for topIndex in range(self.statusList.topLevelItemCount()):
                topItem = self.statusList.topLevelItem(topIndex)
                topItem.setHidden(topItem.text(self.__statusColumn) != txt)
    
    @pyqtSlot(QTreeWidgetItem, int)
    def on_statusList_itemChanged(self, item, column):
        """
        Private slot to act upon item changes.
        
        @param item reference to the changed item (QTreeWidgetItem)
        @param column index of column that changed (integer)
        """
        if column == self.__toBeCommittedColumn:
            self.__updateCommitButton()
    
    @pyqtSlot()
    def on_statusList_itemSelectionChanged(self):
        """
        Private slot to act upon changes of selected items.
        """
        self.__updateButtons()
    
    @pyqtSlot()
    def on_commitButton_clicked(self):
        """
        Private slot to handle the press of the Commit button.
        """
        self.__commit()
    
    @pyqtSlot()
    def on_addButton_clicked(self):
        """
        Private slot to handle the press of the Add button.
        """
        self.__add()
    
    @pyqtSlot()
    def on_diffButton_clicked(self):
        """
        Private slot to handle the press of the Differences button.
        """
        self.__diff()
    
    @pyqtSlot()
    def on_revertButton_clicked(self):
        """
        Private slot to handle the press of the Revert button.
        """
        self.__revert()
    
    @pyqtSlot()
    def on_restoreButton_clicked(self):
        """
        Private slot to handle the press of the Restore button.
        """
        self.__restoreMissing()
    
    ###########################################################################
    ## Context menu handling methods
    ###########################################################################
    
    def __showContextMenu(self, coord):
        """
        Protected slot to show the context menu of the status list.
        
        @param coord the position of the mouse pointer (QPoint)
        """
        self.menu.popup(self.mapToGlobal(coord))
        
    def __commit(self):
        """
        Private slot to handle the Commit context menu entry.
        """
        names = [os.path.join(self.dname, itm.text(self.__pathColumn))
                 for itm in self.__getCommitableItems()]
        if not names:
            E5MessageBox.information(self,
                self.trUtf8("Commit"),
                self.trUtf8("""There are no entries selected to be"""
                            """ committed."""))
            return
        
        if Preferences.getVCS("AutoSaveFiles"):
            vm = e5App().getObject("ViewManager")
            for name in names:
                vm.saveEditor(name)
        self.vcs.vcsCommit(names, '')
       
    def __committed(self):
        """
        Private slot called after the commit has finished.
        """
        if self.isVisible():
            self.on_refreshButton_clicked()
            self.vcs.checkVCSStatus()
        
    def __commitSelectAll(self):
        """
        Private slot to select all entries for commit.
        """
        self.__commitSelect(True)
    
    def __commitDeselectAll(self):
        """
        Private slot to deselect all entries from commit.
        """
        self.__commitSelect(False)
    
    def __add(self):
        """
        Private slot to handle the Add context menu entry.
        """
        names = [os.path.join(self.dname, itm.text(self.__pathColumn))
                 for itm in self.__getUnversionedItems()]
        if not names:
            E5MessageBox.information(self,
                self.trUtf8("Add"),
                self.trUtf8("""There are no unversioned entries"""
                            """ available/selected."""))
            return
        
        self.vcs.vcsAdd(names)
        self.on_refreshButton_clicked()
        
        project = e5App().getObject("Project")
        for name in names:
            project.getModel().updateVCSStatus(name)
        self.vcs.checkVCSStatus()
        
    def __revert(self):
        """
        Private slot to handle the Revert context menu entry.
        """
        names = [os.path.join(self.dname, itm.text(self.__pathColumn))
                 for itm in self.__getModifiedItems()]
        if not names:
            E5MessageBox.information(self,
                self.trUtf8("Revert"),
                self.trUtf8("""There are no uncommitted changes"""
                            """ available/selected."""))
            return
        
        self.vcs.vcsRevert(names)
        self.on_refreshButton_clicked()
        
        project = e5App().getObject("Project")
        for name in names:
            project.getModel().updateVCSStatus(name)
        self.vcs.checkVCSStatus()
        
    def __restoreMissing(self):
        """
        Private slot to handle the Restore Missing context menu entry.
        """
        names = [os.path.join(self.dname, itm.text(self.__pathColumn))
                 for itm in self.__getMissingItems()]
        if not names:
            E5MessageBox.information(self,
                self.trUtf8("Revert"),
                self.trUtf8("""There are no missing entries"""
                            """ available/selected."""))
            return
        
        self.vcs.vcsRevert(names)
        self.on_refreshButton_clicked()
        self.vcs.checkVCSStatus()
        
    def __diff(self):
        """
        Private slot to handle the Diff context menu entry.
        """
        names = [os.path.join(self.dname, itm.text(self.__pathColumn))
                 for itm in self.__getModifiedItems()]
        if not names:
            E5MessageBox.information(self,
                self.trUtf8("Differences"),
                self.trUtf8("""There are no uncommitted changes"""
                            """ available/selected."""))
            return
        
        if self.diff is None:
            self.diff = SvnDiffDialog(self.vcs)
        self.diff.show()
        QApplication.processEvents()
        self.diff.start(names)
        
    def __lock(self):
        """
        Private slot to handle the Lock context menu entry.
        """
        names = [os.path.join(self.dname, itm.text(self.__pathColumn))
                 for itm in self.__getLockActionItems(self.unlockedIndicators)]
        if not names:
            E5MessageBox.information(self,
                self.trUtf8("Lock"),
                self.trUtf8("""There are no unlocked files"""
                            """ available/selected."""))
            return
        
        self.vcs.svnLock(names, parent=self)
        self.on_refreshButton_clicked()
        
    def __unlock(self):
        """
        Private slot to handle the Unlock context menu entry.
        """
        names = [os.path.join(self.dname, itm.text(self.__pathColumn))
                 for itm in self.__getLockActionItems(self.lockedIndicators)]
        if not names:
            E5MessageBox.information(self,
                self.trUtf8("Unlock"),
                self.trUtf8("""There are no locked files"""
                            """ available/selected."""))
            return
        
        self.vcs.svnUnlock(names, parent=self)
        self.on_refreshButton_clicked()
        
    def __breakLock(self):
        """
        Private slot to handle the Break Lock context menu entry.
        """
        names = [os.path.join(self.dname, itm.text(self.__pathColumn))
                 for itm in self.__getLockActionItems(
                    self.stealBreakLockIndicators)]
        if not names:
            E5MessageBox.information(self,
                self.trUtf8("Break Lock"),
                self.trUtf8("""There are no locked files"""
                            """ available/selected."""))
            return
        
        self.vcs.svnUnlock(names, parent=self, breakIt=True)
        self.on_refreshButton_clicked()

    def __stealLock(self):
        """
        Private slot to handle the Break Lock context menu entry.
        """
        names = [os.path.join(self.dname, itm.text(self.__pathColumn))
                 for itm in self.__getLockActionItems(
                    self.stealBreakLockIndicators)]
        if not names:
            E5MessageBox.information(self,
                self.trUtf8("Steal Lock"),
                self.trUtf8("""There are no locked files"""
                            """ available/selected."""))
            return
        
        self.vcs.svnLock(names, parent=self, stealIt=True)
        self.on_refreshButton_clicked()

    def __addToChangelist(self):
        """
        Private slot to add entries to a changelist.
        """
        names = [os.path.join(self.dname, itm.text(self.__pathColumn))
                 for itm in self.__getNonChangelistItems()]
        if not names:
            E5MessageBox.information(self,
                self.trUtf8("Remove from Changelist"),
                self.trUtf8(
                    """There are no files available/selected not """
                    """belonging to a changelist."""
                )
            )
            return
        self.vcs.svnAddToChangelist(names)
        self.on_refreshButton_clicked()

    def __removeFromChangelist(self):
        """
        Private slot to remove entries from their changelists.
        """
        names = [os.path.join(self.dname, itm.text(self.__pathColumn))
                 for itm in self.__getChangelistItems()]
        if not names:
            E5MessageBox.information(self,
                self.trUtf8("Remove from Changelist"),
                self.trUtf8(
                    """There are no files available/selected belonging"""
                    """ to a changelist."""
                )
            )
            return
        self.vcs.svnRemoveFromChangelist(names)
        self.on_refreshButton_clicked()

    def __getCommitableItems(self):
        """
        Private method to retrieve all entries the user wants to commit.
        
        @return list of all items, the user has checked
        """
        commitableItems = []
        for index in range(self.statusList.topLevelItemCount()):
            itm = self.statusList.topLevelItem(index)
            if itm.checkState(self.__toBeCommittedColumn) == Qt.Checked:
                commitableItems.append(itm)
        return commitableItems
    
    def __getModifiedItems(self):
        """
        Private method to retrieve all entries, that have a modified status.
        
        @return list of all items with a modified status
        """
        modifiedItems = []
        for itm in self.statusList.selectedItems():
            if itm.text(self.__statusColumn) in self.modifiedIndicators or \
               itm.text(self.__propStatusColumn) in self.modifiedIndicators:
                modifiedItems.append(itm)
        return modifiedItems
        
    def __getUnversionedItems(self):
        """
        Private method to retrieve all entries, that have an unversioned
        status.
        
        @return list of all items with an unversioned status
        """
        unversionedItems = []
        for itm in self.statusList.selectedItems():
            if itm.text(self.__statusColumn) in self.unversionedIndicators:
                unversionedItems.append(itm)
        return unversionedItems
        
    def __getMissingItems(self):
        """
        Private method to retrieve all entries, that have a missing status.
        
        @return list of all items with a missing status
        """
        missingItems = []
        for itm in self.statusList.selectedItems():
            if itm.text(self.__statusColumn) in self.missingIndicators:
                missingItems.append(itm)
        return missingItems
        
    def __getLockActionItems(self, indicators):
        """
        Private method to retrieve all emtries, that have a locked status.
        
        @return list of all items with a locked status
        """
        lockitems = []
        for itm in self.statusList.selectedItems():
            if itm.text(self.__lockinfoColumn) in indicators:
                lockitems.append(itm)
        return lockitems
        
    def __getChangelistItems(self):
        """
        Private method to retrieve all entries, that are members of
        a changelist.
        
        @return list of all items belonging to a changelist
        """
        clitems = []
        for itm in self.statusList.selectedItems():
            if itm.text(self.__changelistColumn) != "":
                clitems.append(itm)
        return clitems
        
    def __getNonChangelistItems(self):
        """
        Private method to retrieve all entries, that are not members of
        a changelist.
        
        @return list of all items not belonging to a changelist
        """
        clitems = []
        for itm in self.statusList.selectedItems():
            if itm.text(self.__changelistColumn) == "":
                clitems.append(itm)
        return clitems
    
    def __commitSelect(self, selected):
        """
        Private slot to select or deselect all entries.
        
        @param selected commit selection state to be set (boolean)
        """
        for index in range(self.statusList.topLevelItemCount()):
            itm = self.statusList.topLevelItem(index)
            if itm.flags() & Qt.ItemIsUserCheckable:
                if selected:
                    itm.setCheckState(self.__toBeCommittedColumn, Qt.Checked)
                else:
                    itm.setCheckState(self.__toBeCommittedColumn, Qt.Unchecked)