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

# Copyright (c) 2006 - 2015 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing the version control systems interface to Subversion.
"""

from __future__ import unicode_literals

import os
import sys
import shutil
import time

from PyQt5.QtCore import Qt, QMutexLocker, pyqtSignal, QRegExp, QDateTime, \
    QCoreApplication
from PyQt5.QtWidgets import QLineEdit, QDialog, QInputDialog, QApplication

from E5Gui.E5Application import e5App
from E5Gui import E5MessageBox

from VCS.VersionControl import VersionControl

import pysvn

from .SvnDialog import SvnDialog
from .SvnUtilities import getConfigPath, amendConfig, createDefaultConfig

import Utilities


class Subversion(VersionControl):
    """
    Class implementing the version control systems interface to Subversion.
    
    @signal committed() emitted after the commit action has completed
    """
    committed = pyqtSignal()
    
    def __init__(self, plugin, parent=None, name=None):
        """
        Constructor
        
        @param plugin reference to the plugin object
        @param parent parent widget (QWidget)
        @param name name of this object (string)
        """
        VersionControl.__init__(self, parent, name)
        self.defaultOptions = {
            'global': [''],
            'commit': [''],
            'checkout': [''],
            'update': [''],
            'add': [''],
            'remove': [''],
            'diff': [''],
            'log': [''],
            'history': [''],
            'status': [''],
            'tag': [''],
            'export': ['']
        }
        self.interestingDataKeys = [
            "standardLayout",
        ]
        
        self.__plugin = plugin
        self.__ui = parent
        
        self.options = self.defaultOptions
        self.otherData["standardLayout"] = True
        self.tagsList = []
        self.branchesList = []
        self.allTagsBranchesList = []
        self.mergeList = [[], [], []]
        self.showedTags = False
        self.showedBranches = False
        
        self.tagTypeList = [
            'tags',
            'branches'
        ]
        
        self.commandHistory = []
        self.wdHistory = []
        
        if pysvn.version >= (1, 4, 3, 0) and \
                "SVN_ASP_DOT_NET_HACK" in os.environ:
            self.adminDir = '_svn'
        else:
            self.adminDir = '.svn'
        
        self.log = None
        self.diff = None
        self.sbsDiff = None
        self.status = None
        self.propList = None
        self.tagbranchList = None
        self.blame = None
        self.repoBrowser = None
        self.logBrowser = None
        
        self.statusCache = {}
        
        self.__commitData = {}
        self.__commitDialog = None
        
        self.__wcng = True
        # assume new generation working copy metadata format
    
    def getPlugin(self):
        """
        Public method to get a reference to the plugin object.
        
        @return reference to the plugin object (VcsPySvnPlugin)
        """
        return self.__plugin
    
    def getClient(self):
        """
        Public method to create and initialize the pysvn client object.
        
        @return the pysvn client object (pysvn.Client)
        """
        configDir = ""
        authCache = True
        for arg in self.options['global']:
            if arg.startswith("--config-dir"):
                configDir = arg.split("=", 1)[1]
            if arg.startswith("--no-auth-cache"):
                authCache = False
        
        client = pysvn.Client(configDir)
        client.exception_style = 1
        client.set_auth_cache(authCache)
        
        return client
    
    ###########################################################################
    ## Methods of the VCS interface
    ###########################################################################
    
    def vcsShutdown(self):
        """
        Public method used to shutdown the Subversion interface.
        """
        if self.log is not None:
            self.log.close()
        if self.diff is not None:
            self.diff.close()
        if self.sbsDiff is not None:
            self.sbsDiff.close()
        if self.status is not None:
            self.status.close()
        if self.propList is not None:
            self.propList.close()
        if self.tagbranchList is not None:
            self.tagbranchList.close()
        if self.blame is not None:
            self.blame.close()
        if self.repoBrowser is not None:
            self.repoBrowser.close()
        if self.logBrowser is not None:
            self.logBrowser.close()
        
    def vcsExists(self):
        """
        Public method used to test for the presence of the svn executable.
        
        @return flag indicating the existance (boolean) and an error message
            (string)
        """
        self.versionStr = ".".join([str(v) for v in pysvn.svn_version[:-1]])
        self.version = pysvn.svn_version[:-1]
        return True, ""
        
    def vcsInit(self, vcsDir, noDialog=False):
        """
        Public method used to initialize the subversion repository.
        
        The subversion repository has to be initialized from outside eric6
        because the respective command always works locally. Therefore we
        always return TRUE without doing anything.
        
        @param vcsDir name of the VCS directory (string)
        @param noDialog flag indicating quiet operations (boolean)
        @return always TRUE
        """
        return True
        
    def vcsConvertProject(self, vcsDataDict, project):
        """
        Public method to convert an uncontrolled project to a version
        controlled project.
        
        @param vcsDataDict dictionary of data required for the conversion
        @param project reference to the project object
        """
        success = self.vcsImport(vcsDataDict, project.ppath)[0]
        if not success:
            E5MessageBox.critical(
                self.__ui,
                self.tr("Create project in repository"),
                self.tr(
                    """The project could not be created in the repository."""
                    """ Maybe the given repository doesn't exist or the"""
                    """ repository server is down."""))
        else:
            cwdIsPpath = False
            if os.getcwd() == project.ppath:
                os.chdir(os.path.dirname(project.ppath))
                cwdIsPpath = True
            tmpProjectDir = "{0}_tmp".format(project.ppath)
            shutil.rmtree(tmpProjectDir, True)
            os.rename(project.ppath, tmpProjectDir)
            os.makedirs(project.ppath)
            self.vcsCheckout(vcsDataDict, project.ppath)
            if cwdIsPpath:
                os.chdir(project.ppath)
            self.vcsCommit(project.ppath, vcsDataDict["message"], True)
            pfn = project.pfile
            if not os.path.isfile(pfn):
                pfn += "z"
            if not os.path.isfile(pfn):
                E5MessageBox.critical(
                    self.__ui,
                    self.tr("New project"),
                    self.tr(
                        """The project could not be checked out of the"""
                        """ repository.<br />"""
                        """Restoring the original contents."""))
                if os.getcwd() == project.ppath:
                    os.chdir(os.path.dirname(project.ppath))
                    cwdIsPpath = True
                else:
                    cwdIsPpath = False
                shutil.rmtree(project.ppath, True)
                os.rename(tmpProjectDir, project.ppath)
                project.pdata["VCS"] = ['None']
                project.vcs = None
                project.setDirty(True)
                project.saveProject()
                project.closeProject()
                return
            shutil.rmtree(tmpProjectDir, True)
            project.closeProject(noSave=True)
            project.openProject(pfn)
        
    def vcsImport(self, vcsDataDict, projectDir, noDialog=False):
        """
        Public method used to import the project into the Subversion
        repository.
        
        @param vcsDataDict dictionary of data required for the import
        @param projectDir project directory (string)
        @param noDialog flag indicating quiet operations
        @return flag indicating an execution without errors (boolean)
            and a flag indicating the version controll status (boolean)
        """
        noDialog = False
        msg = vcsDataDict["message"]
        if not msg:
            msg = '***'
        
        vcsDir = self.svnNormalizeURL(vcsDataDict["url"])
        if vcsDir.startswith('/'):
            vcsDir = 'file://{0}'.format(vcsDir)
        elif vcsDir[1] in ['|', ':']:
            vcsDir = 'file:///{0}'.format(vcsDir)
        
        project = vcsDir[vcsDir.rfind('/') + 1:]
        
        # create the dir structure to be imported into the repository
        tmpDir = '{0}_tmp'.format(projectDir)
        try:
            os.makedirs(tmpDir)
            if self.otherData["standardLayout"]:
                os.mkdir(os.path.join(tmpDir, project))
                os.mkdir(os.path.join(tmpDir, project, 'branches'))
                os.mkdir(os.path.join(tmpDir, project, 'tags'))
                shutil.copytree(
                    projectDir, os.path.join(tmpDir, project, 'trunk'))
            else:
                shutil.copytree(projectDir, os.path.join(tmpDir, project))
        except OSError as e:
            if os.path.isdir(tmpDir):
                shutil.rmtree(tmpDir, True)
            return False, False
        
        locker = QMutexLocker(self.vcsExecutionMutex)
        cwd = os.getcwd()
        os.chdir(os.path.join(tmpDir, project))
        opts = self.options['global']
        recurse = "--non-recursive" not in opts
        url = self.__svnURL(vcsDir)
        client = self.getClient()
        if not noDialog:
            dlg = SvnDialog(
                self.tr('Importing project into Subversion repository'),
                "import{0} --message {1} .".format(
                    (not recurse) and " --non-recursive" or "", msg),
                client)
            QApplication.processEvents()
        try:
            rev = client.import_(".", url, msg, recurse, ignore=True)
            status = True
        except pysvn.ClientError as e:
            status = False
            rev = None
            if not noDialog:
                dlg.showError(e.args[0])
        locker.unlock()
        if not noDialog:
            rev and dlg.showMessage(self.tr("Imported revision {0}.\n")
                                    .format(rev.number))
            dlg.finish()
            dlg.exec_()
        os.chdir(cwd)
        
        shutil.rmtree(tmpDir, True)
        return status, False
        
    def vcsCheckout(self, vcsDataDict, projectDir, noDialog=False):
        """
        Public method used to check the project out of the Subversion
        repository.
        
        @param vcsDataDict dictionary of data required for the checkout
        @param projectDir project directory to create (string)
        @param noDialog flag indicating quiet operations
        @return flag indicating an execution without errors (boolean)
        """
        noDialog = False
        try:
            tag = vcsDataDict["tag"]
        except KeyError:
            tag = None
        vcsDir = self.svnNormalizeURL(vcsDataDict["url"])
        if vcsDir.startswith('/'):
            vcsDir = 'file://{0}'.format(vcsDir)
        elif vcsDir[1] in ['|', ':']:
            vcsDir = 'file:///{0}'.format(vcsDir)
            
        if self.otherData["standardLayout"]:
            if tag is None or tag == '':
                svnUrl = '{0}/trunk'.format(vcsDir)
            else:
                if not tag.startswith('tags') and \
                        not tag.startswith('branches'):
                    type_, ok = QInputDialog.getItem(
                        None,
                        self.tr("Subversion Checkout"),
                        self.tr(
                            "The tag must be a normal tag (tags) or"
                            " a branch tag (branches)."
                            " Please select from the list."),
                        self.tagTypeList,
                        0, False)
                    if not ok:
                        return False
                    tag = '{0}/{1}'.format(type_, tag)
                svnUrl = '{0}/{1}'.format(vcsDir, tag)
        else:
            svnUrl = vcsDir
        
        opts = self.options['global'] + self.options['checkout']
        recurse = "--non-recursive" not in opts
        url = self.__svnURL(svnUrl)
        client = self.getClient()
        if not noDialog:
            dlg = SvnDialog(
                self.tr('Checking project out of Subversion repository'),
                "checkout{0} {1} {2}".format(
                    (not recurse) and " --non-recursive" or "",
                    url, projectDir),
                client)
            QApplication.processEvents()
        locker = QMutexLocker(self.vcsExecutionMutex)
        try:
            client.checkout(url, projectDir, recurse)
            status = True
        except pysvn.ClientError as e:
            status = False
            if not noDialog:
                dlg.showError(e.args[0])
        locker.unlock()
        if not noDialog:
            dlg.finish()
            dlg.exec_()
        return status
        
    def vcsExport(self, vcsDataDict, projectDir):
        """
        Public method used to export a directory from the Subversion
        repository.
        
        @param vcsDataDict dictionary of data required for the checkout
        @param projectDir project directory to create (string)
        @return flag indicating an execution without errors (boolean)
        """
        try:
            tag = vcsDataDict["tag"]
        except KeyError:
            tag = None
        vcsDir = self.svnNormalizeURL(vcsDataDict["url"])
        if vcsDir.startswith('/') or vcsDir[1] == '|':
            vcsDir = 'file://{0}'.format(vcsDir)
            
        if self.otherData["standardLayout"]:
            if tag is None or tag == '':
                svnUrl = '{0}/trunk'.format(vcsDir)
            else:
                if not tag.startswith('tags') and \
                        not tag.startswith('branches'):
                    type_, ok = QInputDialog.getItem(
                        None,
                        self.tr("Subversion Export"),
                        self.tr(
                            "The tag must be a normal tag (tags) or"
                            " a branch tag (branches)."
                            " Please select from the list."),
                        self.tagTypeList,
                        0, False)
                    if not ok:
                        return False
                    tag = '{0}/{1}'.format(type_, tag)
                svnUrl = '{0}/{1}'.format(vcsDir, tag)
        else:
            svnUrl = vcsDir
        
        opts = self.options['global']
        recurse = "--non-recursive" not in opts
        url = self.__svnURL(svnUrl)
        client = self.getClient()
        dlg = SvnDialog(
            self.tr('Exporting project from Subversion repository'),
            "export --force{0} {1} {2}".format(
                (not recurse) and " --non-recursive" or "",
                url, projectDir),
            client)
        QApplication.processEvents()
        locker = QMutexLocker(self.vcsExecutionMutex)
        try:
            client.export(url, projectDir, force=True, recurse=recurse)
            status = True
        except pysvn.ClientError as e:
            status = False
            dlg.showError(e.args[0])
        locker.unlock()
        dlg.finish()
        dlg.exec_()
        return status
        
    def vcsCommit(self, name, message, noDialog=False):
        """
        Public method used to make the change of a file/directory permanent
        in the Subversion repository.
        
        @param name file/directory name to be committed (string or
        list of strings)
        @param message message for this operation (string)
        @param noDialog flag indicating quiet operations
        """
        if not noDialog and not message:
            # call CommitDialog and get message from there
            if self.__commitDialog is None:
                from .SvnCommitDialog import SvnCommitDialog
                self.__commitDialog = SvnCommitDialog(
                    self.svnGetChangelists(), self.__ui)
                self.__commitDialog.accepted.connect(self.__vcsCommit_Step2)
            self.__commitDialog.show()
            self.__commitDialog.raise_()
            self.__commitDialog.activateWindow()
        
        self.__commitData["name"] = name
        self.__commitData["msg"] = message
        self.__commitData["noDialog"] = noDialog
        
        if noDialog:
            self.__vcsCommit_Step2()
        
    def __vcsCommit_Step2(self):
        """
        Private slot performing the second step of the commit action.
        """
        name = self.__commitData["name"]
        msg = self.__commitData["msg"]
        noDialog = self.__commitData["noDialog"]
        
        if not noDialog:
            # check, if there are unsaved changes, that should be committed
            if isinstance(name, list):
                nameList = name
            else:
                nameList = [name]
            ok = True
            for nam in nameList:
                # check for commit of the project
                if os.path.isdir(nam):
                    project = e5App().getObject("Project")
                    if nam == project.getProjectPath():
                        ok &= project.checkAllScriptsDirty(
                            reportSyntaxErrors=True) and \
                            project.checkDirty()
                        continue
                elif os.path.isfile(nam):
                    editor = e5App().getObject("ViewManager")\
                        .getOpenEditor(nam)
                    if editor:
                        ok &= editor.checkDirty()
                if not ok:
                    break
            
            if not ok:
                res = E5MessageBox.yesNo(
                    self.__ui,
                    self.tr("Commit Changes"),
                    self.tr(
                        """The commit affects files, that have unsaved"""
                        """ changes. Shall the commit be continued?"""),
                    icon=E5MessageBox.Warning)
                if not res:
                    return
        
        if self.__commitDialog is not None:
            msg = self.__commitDialog.logMessage()
            if self.__commitDialog.hasChangelists():
                changelists, keepChangelists = \
                    self.__commitDialog.changelistsData()
            else:
                changelists, keepChangelists = [], False
            self.__commitDialog.deleteLater()
            self.__commitDialog = None
        else:
            changelists, keepChangelists = [], False
        
        if not msg:
            msg = '***'
        
        if isinstance(name, list):
            dname, fnames = self.splitPathList(name)
        else:
            dname, fname = self.splitPath(name)
            fnames = [fname]
        
        if self.svnGetReposName(dname).startswith('http') or \
           self.svnGetReposName(dname).startswith('svn'):
            noDialog = False
        
        locker = QMutexLocker(self.vcsExecutionMutex)
        cwd = os.getcwd()
        os.chdir(dname)
        opts = self.options['global'] + self.options['commit']
        recurse = "--non-recursive" not in opts
        keeplocks = "--keep-locks" in opts
        client = self.getClient()
        if not noDialog:
            dlg = SvnDialog(
                self.tr('Commiting changes to Subversion repository'),
                "commit{0}{1}{2}{3} --message {4} {5}".format(
                    (not recurse) and " --non-recursive" or "",
                    keeplocks and " --keep-locks" or "",
                    keepChangelists and " --keep-changelists" or "",
                    changelists and
                    " --changelist ".join([""] + changelists) or "",
                    msg, " ".join(fnames)),
                client)
            QApplication.processEvents()
        try:
            if changelists:
                rev = client.checkin(fnames, msg,
                                     recurse=recurse, keep_locks=keeplocks,
                                     keep_changelist=keepChangelists,
                                     changelists=changelists)
            else:
                rev = client.checkin(fnames, msg,
                                     recurse=recurse, keep_locks=keeplocks)
        except pysvn.ClientError as e:
            rev = None
            if not noDialog:
                dlg.showError(e.args[0])
        locker.unlock()
        if not noDialog:
            rev and dlg.showMessage(self.tr("Committed revision {0}.")
                                    .format(rev.number))
            dlg.finish()
            dlg.exec_()
        os.chdir(cwd)
        self.committed.emit()
        self.checkVCSStatus()
        
    def vcsUpdate(self, name, noDialog=False):
        """
        Public method used to update a file/directory with the Subversion
        repository.
        
        @param name file/directory name to be updated (string or list of
            strings)
        @param noDialog flag indicating quiet operations (boolean)
        @return flag indicating, that the update contained an add
            or delete (boolean)
        """
        if isinstance(name, list):
            dname, fnames = self.splitPathList(name)
        else:
            dname, fname = self.splitPath(name)
            fnames = [fname]
        
        locker = QMutexLocker(self.vcsExecutionMutex)
        cwd = os.getcwd()
        os.chdir(dname)
        opts = self.options['global'] + self.options['update']
        recurse = "--non-recursive" not in opts
        client = self.getClient()
        if not noDialog:
            dlg = SvnDialog(
                self.tr('Synchronizing with the Subversion repository'),
                "update{0} {1}".format(
                    (not recurse) and " --non-recursive" or "",
                    " ".join(fnames)),
                client)
        QApplication.processEvents()
        try:
            client.update(fnames, recurse)
        except pysvn.ClientError as e:
            dlg.showError(e.args[0])
        locker.unlock()
        if not noDialog:
            dlg.finish()
            dlg.exec_()
            res = dlg.hasAddOrDelete()
        else:
            res = False
        os.chdir(cwd)
        self.checkVCSStatus()
        return res
        
    def vcsAdd(self, name, isDir=False, noDialog=False):
        """
        Public method used to add a file/directory to the Subversion
        repository.
        
        @param name file/directory name to be added (string)
        @param isDir flag indicating name is a directory (boolean)
        @param noDialog flag indicating quiet operations (boolean)
        """
        if isinstance(name, list):
            if isDir:
                dname, fname = os.path.split(name[0])
            else:
                dname, fnames = self.splitPathList(name)
        else:
            if isDir:
                dname, fname = os.path.split(name)
            else:
                dname, fname = self.splitPath(name)
        names = []
        tree = []
        wdir = dname
        if self.__wcng:
            repodir = dname
            while not os.path.isdir(os.path.join(repodir, self.adminDir)):
                repodir = os.path.dirname(repodir)
                if os.path.splitdrive(repodir)[1] == os.sep:
                    return  # oops, project is not version controlled
            while os.path.normcase(dname) != os.path.normcase(repodir) and \
                (os.path.normcase(dname) not in self.statusCache or
                 self.statusCache[os.path.normcase(dname)] ==
                    self.canBeAdded):
                # add directories recursively, if they aren't in the
                # repository already
                tree.insert(-1, dname)
                dname = os.path.dirname(dname)
                wdir = dname
        else:
            while not os.path.exists(os.path.join(dname, self.adminDir)):
                # add directories recursively, if they aren't in the
                # repository already
                tree.insert(-1, dname)
                dname = os.path.dirname(dname)
                wdir = dname
        names.extend(tree)
        
        if isinstance(name, list):
            tree2 = []
            for n in name:
                d = os.path.dirname(n)
                if self.__wcng:
                    repodir = d
                    while not os.path.isdir(
                            os.path.join(repodir, self.adminDir)):
                        repodir = os.path.dirname(repodir)
                        if os.path.splitdrive(repodir)[1] == os.sep:
                            return  # oops, project is not version controlled
                    while (os.path.normcase(d) !=
                            os.path.normcase(repodir)) and \
                        (d not in tree2 + tree) and \
                        (os.path.normcase(d) not in self.statusCache or
                         self.statusCache[os.path.normcase(d)] ==
                            self.canBeAdded):
                        tree2.append(d)
                        d = os.path.dirname(d)
                else:
                    while not os.path.exists(os.path.join(d, self.adminDir)):
                        if d in tree2 + tree:
                            break
                        tree2.append(d)
                        d = os.path.dirname(d)
            tree2.reverse()
            names.extend(tree2)
            names.extend(name)
        else:
            names.append(name)
        
        locker = QMutexLocker(self.vcsExecutionMutex)
        cwd = os.getcwd()
        os.chdir(wdir)
        opts = self.options['global'] + self.options['add']
        recurse = False
        force = "--force" in opts or noDialog
        noignore = "--no-ignore" in opts
        client = self.getClient()
        if not noDialog:
            dlg = SvnDialog(
                self.tr('Adding files/directories to the Subversion'
                        ' repository'),
                "add --non-recursive{0}{1} {2}".format(
                    force and " --force" or "",
                    noignore and " --no-ignore" or "",
                    " ".join(names)),
                client)
            QApplication.processEvents()
        try:
            client.add(names, recurse=recurse, force=force,
                       ignore=not noignore)
        except pysvn.ClientError as e:
            if not noDialog:
                dlg.showError(e.args[0])
        locker.unlock()
        if not noDialog:
            dlg.finish()
            dlg.exec_()
        os.chdir(cwd)
        
    def vcsAddBinary(self, name, isDir=False):
        """
        Public method used to add a file/directory in binary mode to the
        Subversion repository.
        
        @param name file/directory name to be added (string)
        @param isDir flag indicating name is a directory (boolean)
        """
        self.vcsAdd(name, isDir)
        
    def vcsAddTree(self, path):
        """
        Public method to add a directory tree rooted at path to the Subversion
        repository.
        
        @param path root directory of the tree to be added (string or list of
            strings))
        """
        tree = []
        if isinstance(path, list):
            dname, fnames = self.splitPathList(path)
            for n in path:
                d = os.path.dirname(n)
                if self.__wcng:
                    repodir = d
                    while not os.path.isdir(
                            os.path.join(repodir, self.adminDir)):
                        repodir = os.path.dirname(repodir)
                        if os.path.splitdrive(repodir)[1] == os.sep:
                            return  # oops, project is not version controlled
                    while (os.path.normcase(d) !=
                            os.path.normcase(repodir)) and \
                        (d not in tree) and \
                        (os.path.normcase(d) not in self.statusCache or
                         self.statusCache[os.path.normcase(d)] ==
                            self.canBeAdded):
                        tree.append(d)
                        d = os.path.dirname(d)
                else:
                    while not os.path.exists(os.path.join(d, self.adminDir)):
                        # add directories recursively,
                        # if they aren't in the repository already
                        if d in tree:
                            break
                        tree.append(d)
                        d = os.path.dirname(d)
            tree.reverse()
        else:
            dname, fname = os.path.split(path)
            if self.__wcng:
                repodir = dname
                while not os.path.isdir(os.path.join(repodir, self.adminDir)):
                    repodir = os.path.dirname(repodir)
                    if os.path.splitdrive(repodir)[1] == os.sep:
                        return  # oops, project is not version controlled
                while (os.path.normcase(dname) !=
                        os.path.normcase(repodir)) and \
                    (os.path.normcase(dname) not in self.statusCache or
                     self.statusCache[os.path.normcase(dname)] ==
                        self.canBeAdded):
                    # add directories recursively, if they aren't in the
                    # repository already
                    tree.insert(-1, dname)
                    dname = os.path.dirname(dname)
            else:
                while not os.path.exists(os.path.join(dname, self.adminDir)):
                    # add directories recursively,
                    # if they aren't in the repository already
                    tree.insert(-1, dname)
                    dname = os.path.dirname(dname)
        if tree:
            self.vcsAdd(tree, True)
        
        names = []
        if isinstance(path, list):
            names.extend(path)
        else:
            names.append(path)
        
        locker = QMutexLocker(self.vcsExecutionMutex)
        cwd = os.getcwd()
        os.chdir(dname)
        opts = self.options['global'] + self.options['add']
        recurse = True
        force = "--force" in opts
        ignore = "--ignore" in opts
        client = self.getClient()
        dlg = SvnDialog(
            self.tr('Adding directory trees to the Subversion repository'),
            "add{0}{1} {2}".format(
                force and " --force" or "",
                ignore and " --ignore" or "",
                " ".join(names)),
            client)
        QApplication.processEvents()
        try:
            client.add(names, recurse=recurse, force=force, ignore=ignore)
        except pysvn.ClientError as e:
            dlg.showError(e.args[0])
        locker.unlock()
        dlg.finish()
        dlg.exec_()
        os.chdir(cwd)
        
    def vcsRemove(self, name, project=False, noDialog=False):
        """
        Public method used to remove a file/directory from the Subversion
        repository.
        
        The default operation is to remove the local copy as well.
        
        @param name file/directory name to be removed (string or list of
            strings))
        @param project flag indicating deletion of a project tree (boolean)
            (not needed)
        @param noDialog flag indicating quiet operations
        @return flag indicating successfull operation (boolean)
        """
        if not isinstance(name, list):
            name = [name]
        opts = self.options['global'] + self.options['remove']
        force = "--force" in opts or noDialog
        client = self.getClient()
        if not noDialog:
            dlg = SvnDialog(
                self.tr('Removing files/directories from the Subversion'
                        ' repository'),
                "remove{0} {1}".format(
                    force and " --force" or "",
                    " ".join(name)),
                client)
            QApplication.processEvents()
        locker = QMutexLocker(self.vcsExecutionMutex)
        try:
            client.remove(name, force=force)
            res = True
        except pysvn.ClientError as e:
            res = False
            if not noDialog:
                dlg.showError(e.args[0])
        locker.unlock()
        if not noDialog:
            dlg.finish()
            dlg.exec_()
        
        return res
        
    def vcsMove(self, name, project, target=None, noDialog=False):
        """
        Public method used to move a file/directory.
        
        @param name file/directory name to be moved (string)
        @param project reference to the project object
        @param target new name of the file/directory (string)
        @param noDialog flag indicating quiet operations
        @return flag indicating successfull operation (boolean)
        """
        rx_prot = QRegExp('(file:|svn:|svn+ssh:|http:|https:).+')
        opts = self.options['global']
        res = False
        
        if noDialog:
            if target is None:
                return False
            force = True
            accepted = True
        else:
            from .SvnCopyDialog import SvnCopyDialog
            dlg = SvnCopyDialog(name, None, True, "--force" in opts)
            accepted = (dlg.exec_() == QDialog.Accepted)
            if accepted:
                target, force = dlg.getData()
            if not target:
                return False
        
        if not rx_prot.exactMatch(target):
            isDir = os.path.isdir(name)
        else:
            isDir = False
        
        if accepted:
            client = self.getClient()
            if rx_prot.exactMatch(target):
                target = self.__svnURL(target)
                log = "Moving {0} to {1}".format(name, target)
            else:
                log = ""
                target = target
            if not noDialog:
                dlg = \
                    SvnDialog(
                        self.tr('Moving {0}').format(name),
                        "move{0}{1} {2} {3}".format(
                            force and " --force" or "",
                            log and (" --message {0}".format(log)) or "",
                            name, target),
                        client, log=log)
                QApplication.processEvents()
            locker = QMutexLocker(self.vcsExecutionMutex)
            try:
                client.move(name, target, force=force)
                res = True
            except pysvn.ClientError as e:
                res = False
                if not noDialog:
                    dlg.showError(e.args[0])
            locker.unlock()
            if not noDialog:
                dlg.finish()
                dlg.exec_()
            if res and not rx_prot.exactMatch(target):
                if target.startswith(project.getProjectPath()):
                    if isDir:
                        project.moveDirectory(name, target)
                    else:
                        project.renameFileInPdata(name, target)
                else:
                    if isDir:
                        project.removeDirectory(name)
                    else:
                        project.removeFile(name)
        return res
        
    def vcsLog(self, name):
        """
        Public method used to view the log of a file/directory from the
        Subversion repository.
        
        @param name file/directory name to show the log of (string)
        """
        isFile = os.path.isfile(name)
        noEntries, ok = QInputDialog.getInt(
            None,
            self.tr("Subversion Log"),
            self.tr("Select number of entries to show."),
            self.getPlugin().getPreferences("LogLimit"), 1, 999999, 1)
        if ok:
            from .SvnLogDialog import SvnLogDialog
            self.log = SvnLogDialog(self, isFile=isFile)
            self.log.show()
            QApplication.processEvents()
            self.log.start(name, noEntries)
        
    def vcsDiff(self, name):
        """
        Public method used to view the difference of a file/directory to the
        Subversion repository.
        
        If name is a directory and is the project directory, all project files
        are saved first. If name is a file (or list of files), which is/are
        being edited and has unsaved modification, they can be saved or the
        operation may be aborted.
        
        @param name file/directory name to be diffed (string)
        """
        if isinstance(name, list):
            names = name[:]
        else:
            names = [name]
        for nam in names:
            if os.path.isfile(nam):
                editor = e5App().getObject("ViewManager").getOpenEditor(nam)
                if editor and not editor.checkDirty():
                    return
            else:
                project = e5App().getObject("Project")
                if nam == project.ppath and not project.saveAllScripts():
                    return
        from .SvnDiffDialog import SvnDiffDialog
        self.diff = SvnDiffDialog(self)
        self.diff.show()
        QApplication.processEvents()
        self.diff.start(name)
        
    def vcsStatus(self, name):
        """
        Public method used to view the status of files/directories in the
        Subversion repository.
        
        @param name file/directory name(s) to show the status of
            (string or list of strings)
        """
        from .SvnStatusDialog import SvnStatusDialog
        self.status = SvnStatusDialog(self)
        self.status.show()
        QApplication.processEvents()
        self.status.start(name)
        
    def vcsTag(self, name):
        """
        Public method used to set the tag of a file/directory in the
        Subversion repository.
        
        @param name file/directory name to be tagged (string)
        """
        dname, fname = self.splitPath(name)
        
        reposURL = self.svnGetReposName(dname)
        if reposURL is None:
            E5MessageBox.critical(
                self.__ui,
                self.tr("Subversion Error"),
                self.tr(
                    """The URL of the project repository could not be"""
                    """ retrieved from the working copy. The tag operation"""
                    """ will be aborted"""))
            return
        
        if self.otherData["standardLayout"]:
            url = None
        else:
            url = self.svnNormalizeURL(reposURL)
        from .SvnTagDialog import SvnTagDialog
        dlg = SvnTagDialog(self.allTagsBranchesList, url,
                           self.otherData["standardLayout"])
        if dlg.exec_() == QDialog.Accepted:
            tag, tagOp = dlg.getParameters()
            if tag in self.allTagsBranchesList:
                self.allTagsBranchesList.remove(tag)
            self.allTagsBranchesList.insert(0, tag)
        else:
            return
        
        if self.otherData["standardLayout"]:
            rx_base = QRegExp('(.+)/(trunk|tags|branches).*')
            if not rx_base.exactMatch(reposURL):
                E5MessageBox.critical(
                    self.__ui,
                    self.tr("Subversion Error"),
                    self.tr(
                        """The URL of the project repository has an"""
                        """ invalid format. The tag operation will"""
                        """ be aborted"""))
                return
            
            reposRoot = rx_base.cap(1)
            if tagOp in [1, 4]:
                url = '{0}/tags/{1}'.format(reposRoot, Utilities.quote(tag))
            elif tagOp in [2, 8]:
                url = '{0}/branches/{1}'.format(
                    reposRoot, Utilities.quote(tag))
        else:
            url = self.__svnURL(tag)
        
        self.tagName = tag
        client = self.getClient()
        rev = None
        if tagOp in [1, 2]:
            log = 'Created tag <{0}>'.format(self.tagName)
            dlg = SvnDialog(
                self.tr('Tagging {0} in the Subversion repository')
                    .format(name),
                "copy --message {0} {1} {2}".format(log, reposURL, url),
                client, log=log)
            QApplication.processEvents()
            locker = QMutexLocker(self.vcsExecutionMutex)
            try:
                rev = client.copy(reposURL, url)
            except pysvn.ClientError as e:
                dlg.showError(e.args[0])
            locker.unlock()
        else:
            log = 'Deleted tag <{0}>'.format(self.tagName)
            dlg = SvnDialog(
                self.tr('Tagging {0} in the Subversion repository')
                    .format(name),
                "remove --message {0} {1}".format(log, url),
                client, log=log)
            QApplication.processEvents()
            locker = QMutexLocker(self.vcsExecutionMutex)
            try:
                rev = client.remove(url)
            except pysvn.ClientError as e:
                dlg.showError(e.args[0])
            locker.unlock()
        rev and dlg.showMessage(
            self.tr("Revision {0}.\n").format(rev.number))
        dlg.finish()
        dlg.exec_()
        
    def vcsRevert(self, name):
        """
        Public method used to revert changes made to a file/directory.
        
        @param name file/directory name to be reverted (string)
        """
        recurse = False
        if not isinstance(name, list):
            name = [name]
            if os.path.isdir(name[0]):
                recurse = True
        
        project = e5App().getObject("Project")
        names = [project.getRelativePath(nam) for nam in name]
        if names[0]:
            from UI.DeleteFilesConfirmationDialog import \
                DeleteFilesConfirmationDialog
            dia = DeleteFilesConfirmationDialog(
                self.parent(),
                self.tr("Revert changes"),
                self.tr(
                    "Do you really want to revert all changes to these files"
                    " or directories?"),
                name)
            yes = dia.exec_() == QDialog.Accepted
        else:
            yes = E5MessageBox.yesNo(
                None,
                self.tr("Revert changes"),
                self.tr("""Do you really want to revert all changes of"""
                        """ the project?"""))
        if yes:
            client = self.getClient()
            dlg = SvnDialog(
                self.tr('Reverting changes'),
                "revert {0} {1}".format(
                    (not recurse) and " --non-recursive" or "",
                    " ".join(name)),
                client)
            QApplication.processEvents()
            locker = QMutexLocker(self.vcsExecutionMutex)
            try:
                client.revert(name, recurse)
            except pysvn.ClientError as e:
                dlg.showError(e.args[0])
            locker.unlock()
            dlg.finish()
            dlg.exec_()
            self.checkVCSStatus()
    
    def vcsSwitch(self, name):
        """
        Public method used to switch a directory to a different tag/branch.
        
        @param name directory name to be switched (string)
        @return flag indicating, that the switch contained an add
            or delete (boolean)
        """
        dname, fname = self.splitPath(name)
        
        reposURL = self.svnGetReposName(dname)
        if reposURL is None:
            E5MessageBox.critical(
                self.__ui,
                self.tr("Subversion Error"),
                self.tr(
                    """The URL of the project repository could not be"""
                    """ retrieved from the working copy. The switch"""
                    """ operation will be aborted"""))
            return False
        
        if self.otherData["standardLayout"]:
            url = None
        else:
            url = self.svnNormalizeURL(reposURL)
        from .SvnSwitchDialog import SvnSwitchDialog
        dlg = SvnSwitchDialog(self.allTagsBranchesList, url,
                              self.otherData["standardLayout"])
        if dlg.exec_() == QDialog.Accepted:
            tag, tagType = dlg.getParameters()
            if tag in self.allTagsBranchesList:
                self.allTagsBranchesList.remove(tag)
            self.allTagsBranchesList.insert(0, tag)
        else:
            return False
        
        if self.otherData["standardLayout"]:
            rx_base = QRegExp('(.+)/(trunk|tags|branches).*')
            if not rx_base.exactMatch(reposURL):
                E5MessageBox.critical(
                    self.__ui,
                    self.tr("Subversion Error"),
                    self.tr(
                        """The URL of the project repository has an"""
                        """ invalid format. The switch operation will"""
                        """ be aborted"""))
                return False
            
            reposRoot = rx_base.cap(1)
            tn = tag
            if tagType == 1:
                url = '{0}/tags/{1}'.format(reposRoot, Utilities.quote(tag))
            elif tagType == 2:
                url = '{0}/branches/{1}'.format(
                    reposRoot, Utilities.quote(tag))
            elif tagType == 4:
                url = '{0}/trunk'.format(reposRoot)
                tn = 'HEAD'
        else:
            url = self.__svnURL(tag)
            tn = url
        
        client = self.getClient()
        dlg = SvnDialog(self.tr('Switching to {0}').format(tn),
                        "switch {0} {1}".format(url, name),
                        client)
        QApplication.processEvents()
        locker = QMutexLocker(self.vcsExecutionMutex)
        try:
            rev = client.switch(name, url)
            dlg.showMessage(self.tr("Revision {0}.\n").format(rev.number))
        except pysvn.ClientError as e:
            dlg.showError(e.args[0])
        locker.unlock()
        dlg.finish()
        dlg.exec_()
        res = dlg.hasAddOrDelete()
        self.checkVCSStatus()
        return res
        
    def vcsMerge(self, name):
        """
        Public method used to merge a URL/revision into the local project.
        
        @param name file/directory name to be merged (string)
        """
        dname, fname = self.splitPath(name)
        
        opts = self.options['global']
        from .SvnMergeDialog import SvnMergeDialog
        dlg = SvnMergeDialog(self.mergeList[0], self.mergeList[1],
                             self.mergeList[2], "--force" in opts)
        if dlg.exec_() == QDialog.Accepted:
            urlrev1, urlrev2, target, force = dlg.getParameters()
        else:
            return
        
        # remember URL or revision
        if urlrev1 in self.mergeList[0]:
            self.mergeList[0].remove(urlrev1)
        self.mergeList[0].insert(0, urlrev1)
        if urlrev2 in self.mergeList[1]:
            self.mergeList[1].remove(urlrev2)
        self.mergeList[1].insert(0, urlrev2)
        
        rx_rev = QRegExp('\\d+|HEAD|head')
        
        locker = QMutexLocker(self.vcsExecutionMutex)
        cwd = os.getcwd()
        os.chdir(dname)
        recurse = "--non-recursive" not in opts
        if rx_rev.exactMatch(urlrev1):
            if urlrev1 in ["HEAD", "head"]:
                revision1 = pysvn.Revision(pysvn.opt_revision_kind.head)
                rev1 = "HEAD"
            else:
                revision1 = pysvn.Revision(
                    pysvn.opt_revision_kind.number, int(urlrev1))
                rev1 = urlrev1
            if urlrev2 in ["HEAD", "head"]:
                revision2 = pysvn.Revision(pysvn.opt_revision_kind.head)
                rev2 = "HEAD"
            else:
                revision2 = pysvn.Revision(
                    pysvn.opt_revision_kind.number, int(urlrev2))
                rev2 = urlrev2
            if not target:
                url1 = name
                url2 = name
            else:
                url1 = target
                url2 = target
                
            # remember target
            if target in self.mergeList[2]:
                self.mergeList[2].remove(target)
            self.mergeList[2].insert(0, target)
        else:
            if "@" in urlrev1:
                url1, rev = urlrev1.split("@")
                if rev in ["HEAD", "head"]:
                    revision1 = pysvn.Revision(pysvn.opt_revision_kind.head)
                    rev1 = "HEAD"
                else:
                    revision1 = pysvn.Revision(
                        pysvn.opt_revision_kind.number, int(rev))
                    rev1 = rev
            else:
                url1 = urlrev1
                revision1 = pysvn.Revision(pysvn.opt_revision_kind.unspecified)
                rev1 = ""
            if "@" in urlrev2:
                url2, rev = urlrev2.split("@")
                if rev in ["HEAD", "head"]:
                    revision2 = pysvn.Revision(pysvn.opt_revision_kind.head)
                    rev2 = "HEAD"
                else:
                    revision2 = pysvn.Revision(
                        pysvn.opt_revision_kind.number, int(rev))
                    rev2 = rev
            else:
                url2 = urlrev2
                revision2 = pysvn.Revision(pysvn.opt_revision_kind.unspecified)
                rev2 = ""
        client = self.getClient()
        dlg = \
            SvnDialog(
                self.tr('Merging {0}').format(name),
                "merge{0}{1} {2} {3} {4}".format(
                    (not recurse) and " --non-recursive" or "",
                    force and " --force" or "",
                    "{0}{1}".format(url1, rev1 and ("@" + rev1) or ""),
                    "{0}{1}".format(url2, rev2 and ("@" + rev2) or ""),
                    fname),
                client)
        QApplication.processEvents()
        try:
            client.merge(url1, revision1, url2, revision2, fname,
                         recurse=recurse, force=force)
        except pysvn.ClientError as e:
            dlg.showError(e.args[0])
        locker.unlock()
        dlg.finish()
        dlg.exec_()
        os.chdir(cwd)
        
    def vcsRegisteredState(self, name):
        """
        Public method used to get the registered state of a file in the vcs.
        
        @param name filename to check (string)
        @return a combination of canBeCommited and canBeAdded
        """
        if self.__wcng:
            return self.__vcsRegisteredState_wcng(name)
        else:
            return self.__vcsRegisteredState_wc(name)
        
    def __vcsRegisteredState_wcng(self, name):
        """
        Private method used to get the registered state of a file in the vcs.
        
        This is the variant for subversion installations using the new
        working copy meta-data format.
        
        @param name filename to check (string)
        @return a combination of canBeCommited and canBeAdded
        """
        if name.endswith(os.sep):
            name = name[:-1]
        name = os.path.normcase(name)
        dname, fname = self.splitPath(name)
        
        if fname == '.' and os.path.isdir(os.path.join(dname, self.adminDir)):
            return self.canBeCommitted
        
        if name in self.statusCache:
            return self.statusCache[name]
        
        name = os.path.normcase(name)
        states = {name: 0}
        states = self.vcsAllRegisteredStates(states, dname, False)
        if states[name] == self.canBeCommitted:
            return self.canBeCommitted
        else:
            return self.canBeAdded
        
    def __vcsRegisteredState_wc(self, name):
        """
        Private method used to get the registered state of a file in the vcs.
        
        This is the variant for subversion installations using the old working
        copy meta-data format.
        
        @param name filename to check (string)
        @return a combination of canBeCommited and canBeAdded
        """
        dname, fname = self.splitPath(name)
        
        if fname == '.':
            if os.path.isdir(os.path.join(dname, self.adminDir)):
                return self.canBeCommitted
            else:
                return self.canBeAdded
        
        name = os.path.normcase(name)
        states = {name: 0}
        states = self.vcsAllRegisteredStates(states, dname, False)
        if states[name] == self.canBeCommitted:
            return self.canBeCommitted
        else:
            return self.canBeAdded
        
    def vcsAllRegisteredStates(self, names, dname, shortcut=True):
        """
        Public method used to get the registered states of a number of files
        in the vcs.
        
        <b>Note:</b> If a shortcut is to be taken, the code will only check,
        if the named directory has been scanned already. If so, it is assumed,
        that the states for all files has been populated by the previous run.
        
        @param names dictionary with all filenames to be checked as keys
        @param dname directory to check in (string)
        @param shortcut flag indicating a shortcut should be taken (boolean)
        @return the received dictionary completed with a combination of
            canBeCommited and canBeAdded or None in order to signal an error
        """
        if self.__wcng:
            return self.__vcsAllRegisteredStates_wcng(names, dname, shortcut)
        else:
            return self.__vcsAllRegisteredStates_wc(names, dname, shortcut)
        
    def __vcsAllRegisteredStates_wcng(self, names, dname, shortcut=True):
        """
        Private method used to get the registered states of a number of files
        in the vcs.
        
        This is the variant for subversion installations using the new working
        copy meta-data format.
        
        <b>Note:</b> If a shortcut is to be taken, the code will only check,
        if the named directory has been scanned already. If so, it is assumed,
        that the states for all files has been populated by the previous run.
        
        @param names dictionary with all filenames to be checked as keys
        @param dname directory to check in (string)
        @param shortcut flag indicating a shortcut should be taken (boolean)
        @return the received dictionary completed with a combination of
            canBeCommited and canBeAdded or None in order to signal an error
        """
        if dname.endswith(os.sep):
            dname = dname[:-1]
        dname = os.path.normcase(dname)
        
        found = False
        for name in self.statusCache.keys():
            if name in names:
                found = True
                names[name] = self.statusCache[name]
        
        if not found:
            # find the root of the repo
            repodir = dname
            while not os.path.isdir(os.path.join(repodir, self.adminDir)):
                repodir = os.path.dirname(repodir)
                if os.path.splitdrive(repodir)[1] == os.sep:
                    return names
            
            from .SvnDialogMixin import SvnDialogMixin
            mixin = SvnDialogMixin()
            client = self.getClient()
            client.callback_get_login = \
                mixin._clientLoginCallback
            client.callback_ssl_server_trust_prompt = \
                mixin._clientSslServerTrustPromptCallback
            
            try:
                locker = QMutexLocker(self.vcsExecutionMutex)
                allFiles = client.status(dname, recurse=True, get_all=True,
                                         ignore=True, update=False)
                locker.unlock()
                dirs = [x for x in names.keys() if os.path.isdir(x)]
                for file in allFiles:
                    # file.path is always unicode in Python 2
                    name = os.path.normcase(file.path)
                    if self.__isVersioned(file):
                        if name in names:
                            names[name] = self.canBeCommitted
                            dn = name
                            while os.path.splitdrive(dn)[1] != os.sep and \
                                    dn != repodir:
                                dn = os.path.dirname(dn)
                                if dn in self.statusCache and \
                                   self.statusCache[dn] == self.canBeCommitted:
                                    break
                                self.statusCache[dn] = self.canBeCommitted
                        self.statusCache[name] = self.canBeCommitted
                        if dirs:
                            for d in dirs:
                                if name.startswith(d):
                                    names[d] = self.canBeCommitted
                                    self.statusCache[d] = self.canBeCommitted
                                    dirs.remove(d)
                                    break
                    else:
                        self.statusCache[name] = self.canBeAdded
            except pysvn.ClientError:
                locker.unlock()    # ignore pysvn errors
        
        return names
        
    def __vcsAllRegisteredStates_wc(self, names, dname, shortcut=True):
        """
        Private method used to get the registered states of a number of files
        in the VCS.
        
        This is the variant for subversion installations using the old working
        copy meta-data format.
        
        <b>Note:</b> If a shortcut is to be taken, the code will only check,
        if the named directory has been scanned already. If so, it is assumed,
        that the states for all files has been populated by the previous run.
        
        @param names dictionary with all filenames to be checked as keys
        @param dname directory to check in (string)
        @param shortcut flag indicating a shortcut should be taken (boolean)
        @return the received dictionary completed with a combination of
            canBeCommited and canBeAdded or None in order to signal an error
        """
        if not os.path.isdir(os.path.join(dname, self.adminDir)):
            # not under version control -> do nothing
            return names
        
        found = False
        for name in self.statusCache:
            if os.path.dirname(name) == dname:
                if shortcut:
                    found = True
                    break
                if name in names:
                    found = True
                    names[name] = self.statusCache[name]
        
        if not found:
            from .SvnDialogMixin import SvnDialogMixin
            mixin = SvnDialogMixin()
            client = self.getClient()
            client.callback_get_login = \
                mixin._clientLoginCallback
            client.callback_ssl_server_trust_prompt = \
                mixin._clientSslServerTrustPromptCallback
            
            try:
                locker = QMutexLocker(self.vcsExecutionMutex)
                allFiles = client.status(dname, recurse=True, get_all=True,
                                         ignore=True, update=False)
                locker.unlock()
                for file in allFiles:
                    # file.path is always unicode in Python 2
                    name = os.path.normcase(file.path)
                    if self.__isVersioned(file):
                        if name in names:
                            names[name] = self.canBeCommitted
                        self.statusCache[name] = self.canBeCommitted
                    else:
                        self.statusCache[name] = self.canBeAdded
            except pysvn.ClientError:
                locker.unlock()    # ignore pysvn errors
        
        return names
        
    def __isVersioned(self, status):
        """
        Private method to check, if the given status indicates a
        versioned state.
        
        @param status status object to check (pysvn.PysvnStatus)
        @return flag indicating a versioned state (boolean)
        """
        return status["text_status"] in [
            pysvn.wc_status_kind.normal,
            pysvn.wc_status_kind.added,
            pysvn.wc_status_kind.missing,
            pysvn.wc_status_kind.deleted,
            pysvn.wc_status_kind.replaced,
            pysvn.wc_status_kind.modified,
            pysvn.wc_status_kind.merged,
            pysvn.wc_status_kind.conflicted,
        ]
        
    def clearStatusCache(self):
        """
        Public method to clear the status cache.
        """
        self.statusCache = {}
        
    def vcsInitConfig(self, project):
        """
        Public method to initialize the VCS configuration.
        
        This method ensures, that eric specific files and directories are
        ignored.
        
        @param project reference to the project (Project)
        """
        configPath = getConfigPath()
        if os.path.exists(configPath):
            amendConfig()
        else:
            createDefaultConfig()
    
    def vcsName(self):
        """
        Public method returning the name of the vcs.
        
        @return always 'Subversion' (string)
        """
        return "Subversion"

    def vcsCleanup(self, name):
        """
        Public method used to cleanup the working copy.
        
        @param name directory name to be cleaned up (string)
        """
        client = self.getClient()
        dlg = SvnDialog(self.tr('Cleaning up {0}').format(name),
                        "cleanup {0}".format(name),
                        client)
        QApplication.processEvents()
        locker = QMutexLocker(self.vcsExecutionMutex)
        try:
            client.cleanup(name)
        except pysvn.ClientError as e:
            dlg.showError(e.args[0])
        locker.unlock()
        dlg.finish()
        dlg.exec_()
    
    def vcsCommandLine(self, name):
        """
        Public method used to execute arbitrary subversion commands.
        
        @param name directory name of the working directory (string)
        """
        from .SvnCommandDialog import SvnCommandDialog
        dlg = SvnCommandDialog(self.commandHistory, self.wdHistory, name)
        if dlg.exec_() == QDialog.Accepted:
            command, wd = dlg.getData()
            commandList = Utilities.parseOptionString(command)
            
            # This moves any previous occurrence of these arguments to the head
            # of the list.
            if command in self.commandHistory:
                self.commandHistory.remove(command)
            self.commandHistory.insert(0, command)
            if wd in self.wdHistory:
                self.wdHistory.remove(wd)
            self.wdHistory.insert(0, wd)
            
            args = []
            self.addArguments(args, commandList)
            
            from Plugins.VcsPlugins.vcsSubversion.SvnDialog import \
                SvnDialog as SvnProcessDialog
            dia = SvnProcessDialog(self.tr('Subversion command'))
            res = dia.startProcess(args, wd)
            if res:
                dia.exec_()
        
    def vcsOptionsDialog(self, project, archive, editable=False, parent=None):
        """
        Public method to get a dialog to enter repository info.
        
        @param project reference to the project object
        @param archive name of the project in the repository (string)
        @param editable flag indicating that the project name is editable
            (boolean)
        @param parent parent widget (QWidget)
        @return reference to the instantiated options dialog (SvnOptionsDialog)
        """
        from .SvnOptionsDialog import SvnOptionsDialog
        return SvnOptionsDialog(self, project, parent)
        
    def vcsNewProjectOptionsDialog(self, parent=None):
        """
        Public method to get a dialog to enter repository info for getting a
        new project.
        
        @param parent parent widget (QWidget)
        @return reference to the instantiated options dialog
            (SvnNewProjectOptionsDialog)
        """
        from .SvnNewProjectOptionsDialog import SvnNewProjectOptionsDialog
        return SvnNewProjectOptionsDialog(self, parent)
        
    def vcsRepositoryInfos(self, ppath):
        """
        Public method to retrieve information about the repository.
        
        @param ppath local path to get the repository infos (string)
        @return string with ready formated info for display (string)
        """
        try:
            entry = self.getClient().info(ppath)
        except pysvn.ClientError as e:
            return e.args[0]
        
        if hasattr(pysvn, 'svn_api_version'):
            apiVersion = "{0} {1}".format(
                ".".join([str(v) for v in pysvn.svn_api_version[:3]]),
                pysvn.svn_api_version[3])
        else:
            apiVersion = QCoreApplication.translate('subversion', "unknown")
        
        hmsz = time.strftime("%H:%M:%S %Z", time.localtime(entry.commit_time))
        if sys.version_info[0] == 2:
            hmsz = hmsz.decode(sys.getfilesystemencoding())
        return QCoreApplication.translate(
            'subversion',
            """<h3>Repository information</h3>"""
            """<table>"""
            """<tr><td><b>PySvn V.</b></td><td>{0}</td></tr>"""
            """<tr><td><b>Subversion V.</b></td><td>{1}</td></tr>"""
            """<tr><td><b>Subversion API V.</b></td><td>{2}</td></tr>"""
            """<tr><td><b>URL</b></td><td>{3}</td></tr>"""
            """<tr><td><b>Current revision</b></td><td>{4}</td></tr>"""
            """<tr><td><b>Committed revision</b></td><td>{5}</td></tr>"""
            """<tr><td><b>Committed date</b></td><td>{6}</td></tr>"""
            """<tr><td><b>Comitted time</b></td><td>{7}</td></tr>"""
            """<tr><td><b>Last author</b></td><td>{8}</td></tr>"""
            """</table>"""
        )\
            .format(".".join([str(v) for v in pysvn.version]),
                    ".".join([str(v) for v in pysvn.svn_version[:3]]),
                    apiVersion,
                    entry.url,
                    entry.revision.number,
                    entry.commit_revision.number,
                    time.strftime(
                        "%Y-%m-%d", time.localtime(entry.commit_time)),
                    hmsz,
                    entry.commit_author
                    )
    
    ###########################################################################
    ## Public Subversion specific methods are below.
    ###########################################################################
    
    def svnGetReposName(self, path):
        """
        Public method used to retrieve the URL of the subversion repository
        path.
        
        @param path local path to get the svn repository path for (string)
        @return string with the repository path URL
        """
        client = pysvn.Client()
        locker = QMutexLocker(self.vcsExecutionMutex)
        try:
            entry = client.info(path)
            url = entry.url
        except pysvn.ClientError:
            url = ""
        locker.unlock()
        return url

    def svnResolve(self, name):
        """
        Public method used to resolve conflicts of a file/directory.
        
        @param name file/directory name to be resolved (string)
        """
        if isinstance(name, list):
            dname, fnames = self.splitPathList(name)
        else:
            dname, fname = self.splitPath(name)
            fnames = [fname]
        
        locker = QMutexLocker(self.vcsExecutionMutex)
        cwd = os.getcwd()
        os.chdir(dname)
        opts = self.options['global']
        recurse = "--non-recursive" not in opts
        client = self.getClient()
        dlg = SvnDialog(self.tr('Resolving conficts'),
                        "resolved{0} {1}".format(
                            (not recurse) and " --non-recursive" or "",
                            " ".join(fnames)),
                        client)
        QApplication.processEvents()
        try:
            for name in fnames:
                client.resolved(name, recurse=recurse)
        except pysvn.ClientError as e:
            dlg.showError(e.args[0])
        locker.unlock()
        dlg.finish()
        dlg.exec_()
        os.chdir(cwd)
        self.checkVCSStatus()
    
    def svnCopy(self, name, project):
        """
        Public method used to copy a file/directory.
        
        @param name file/directory name to be copied (string)
        @param project reference to the project object
        @return flag indicating successfull operation (boolean)
        """
        from .SvnCopyDialog import SvnCopyDialog
        rx_prot = QRegExp('(file:|svn:|svn+ssh:|http:|https:).+')
        dlg = SvnCopyDialog(name)
        res = False
        if dlg.exec_() == QDialog.Accepted:
            target, force = dlg.getData()
            
            client = self.getClient()
            if rx_prot.exactMatch(target):
                target = self.__svnURL(target)
                log = "Copying {0} to {1}".format(name, target)
            else:
                log = ""
                target = target
            dlg = \
                SvnDialog(
                    self.tr('Copying {0}').format(name),
                    "copy{0} {1} {2}".format(
                        log and (" --message {0}".format(log)) or "",
                        name, target),
                    client, log=log)
            QApplication.processEvents()
            locker = QMutexLocker(self.vcsExecutionMutex)
            try:
                client.copy(name, target)
                res = True
            except pysvn.ClientError as e:
                res = False
                dlg.showError(e.args[0])
            locker.unlock()
            dlg.finish()
            dlg.exec_()
            if res and \
               not rx_prot.exactMatch(target) and \
               target.startswith(project.getProjectPath()):
                if os.path.isdir(name):
                    project.copyDirectory(name, target)
                else:
                    project.appendFile(target)
        return res
    
    def svnListProps(self, name, recursive=False):
        """
        Public method used to list the properties of a file/directory.
        
        @param name file/directory name (string or list of strings)
        @param recursive flag indicating a recursive list is requested
        """
        from .SvnPropListDialog import SvnPropListDialog
        self.propList = SvnPropListDialog(self)
        self.propList.show()
        QApplication.processEvents()
        self.propList.start(name, recursive)
        
    def svnSetProp(self, name, recursive=False):
        """
        Public method used to add a property to a file/directory.
        
        @param name file/directory name (string or list of strings)
        @param recursive flag indicating a recursive set is requested
        """
        from .SvnPropSetDialog import SvnPropSetDialog
        dlg = SvnPropSetDialog(recursive)
        if dlg.exec_() == QDialog.Accepted:
            propName, propValue, recurse = dlg.getData()
            if not propName:
                E5MessageBox.critical(
                    self.__ui,
                    self.tr("Subversion Set Property"),
                    self.tr(
                        """You have to supply a property name. Aborting."""))
                return
            
            if isinstance(name, list):
                dname, fnames = self.splitPathList(name)
            else:
                dname, fname = self.splitPath(name)
                fnames = [fname]
            
            locker = QMutexLocker(self.vcsExecutionMutex)
            cwd = os.getcwd()
            os.chdir(dname)
            opts = self.options['global']
            skipchecks = "--skip-checks" in opts
            client = self.getClient()
            dlg = \
                SvnDialog(
                    self.tr('Subversion Set Property'),
                    "propset{0}{1} {2} {3} {4}".format(
                        recurse and " --recurse" or "",
                        skipchecks and " --skip-checks" or "",
                        propName, propValue,
                        " ".join(fnames)),
                    client)
            QApplication.processEvents()
            try:
                for name in fnames:
                    client.propset(propName, propValue, name,
                                   recurse=recurse, skip_checks=skipchecks)
            except pysvn.ClientError as e:
                dlg.showError(e.args[0])
            locker.unlock()
            dlg.showMessage(self.tr("Property set."))
            dlg.finish()
            dlg.exec_()
            os.chdir(cwd)
        
    def svnDelProp(self, name, recursive=False):
        """
        Public method used to delete a property of a file/directory.
        
        @param name file/directory name (string or list of strings)
        @param recursive flag indicating a recursive list is requested
        """
        from .SvnPropDelDialog import SvnPropDelDialog
        dlg = SvnPropDelDialog(recursive)
        if dlg.exec_() == QDialog.Accepted:
            propName, recurse = dlg.getData()
            
            if not propName:
                E5MessageBox.critical(
                    self.__ui,
                    self.tr("Subversion Delete Property"),
                    self.tr(
                        """You have to supply a property name. Aborting."""))
                return
            
            if isinstance(name, list):
                dname, fnames = self.splitPathList(name)
            else:
                dname, fname = self.splitPath(name)
                fnames = [fname]
            
            locker = QMutexLocker(self.vcsExecutionMutex)
            cwd = os.getcwd()
            os.chdir(dname)
            opts = self.options['global']
            skipchecks = "--skip-checks" in opts
            client = self.getClient()
            dlg = \
                SvnDialog(
                    self.tr('Subversion Delete Property'),
                    "propdel{0}{1} {2} {3}".format(
                        recurse and " --recurse" or "",
                        skipchecks and " --skip-checks" or "",
                        propName, " ".join(fnames)),
                    client)
            QApplication.processEvents()
            try:
                for name in fnames:
                    client.propdel(propName, name,
                                   recurse=recurse, skip_checks=skipchecks)
            except pysvn.ClientError as e:
                dlg.showError(e.args[0])
            locker.unlock()
            dlg.showMessage(self.tr("Property deleted."))
            dlg.finish()
            dlg.exec_()
            os.chdir(cwd)
        
    def svnListTagBranch(self, path, tags=True):
        """
        Public method used to list the available tags or branches.
        
        @param path directory name of the project (string)
        @param tags flag indicating listing of branches or tags
                (False = branches, True = tags)
        """
        from .SvnTagBranchListDialog import SvnTagBranchListDialog
        self.tagbranchList = SvnTagBranchListDialog(self)
        self.tagbranchList.show()
        QApplication.processEvents()
        res = self.tagbranchList.start(path, tags)
        if res:
            if tags:
                self.tagsList = self.tagbranchList.getTagList()
                if not self.showedTags:
                    self.allTagsBranchesList = \
                        self.allTagsBranchesList + self.tagsList
                    self.showedTags = True
            elif not tags:
                self.branchesList = self.tagbranchList.getTagList()
                if not self.showedBranches:
                    self.allTagsBranchesList = \
                        self.allTagsBranchesList + self.branchesList
                    self.showedBranches = True
        
    def svnBlame(self, name):
        """
        Public method to show the output of the svn blame command.
        
        @param name file name to show the blame for (string)
        """
        from .SvnBlameDialog import SvnBlameDialog
        self.blame = SvnBlameDialog(self)
        self.blame.show()
        QApplication.processEvents()
        self.blame.start(name)
        
    def svnExtendedDiff(self, name):
        """
        Public method used to view the difference of a file/directory to the
        Subversion repository.
        
        If name is a directory and is the project directory, all project files
        are saved first. If name is a file (or list of files), which is/are
        being edited and has unsaved modification, they can be saved or the
        operation may be aborted.
        
        This method gives the chance to enter the revisions to be compared.
        
        @param name file/directory name to be diffed (string)
        """
        if isinstance(name, list):
            names = name[:]
        else:
            names = [name]
        for nam in names:
            if os.path.isfile(nam):
                editor = e5App().getObject("ViewManager").getOpenEditor(nam)
                if editor and not editor.checkDirty():
                    return
            else:
                project = e5App().getObject("Project")
                if nam == project.ppath and not project.saveAllScripts():
                    return
        from .SvnRevisionSelectionDialog import SvnRevisionSelectionDialog
        dlg = SvnRevisionSelectionDialog()
        if dlg.exec_() == QDialog.Accepted:
            revisions = dlg.getRevisions()
            from .SvnDiffDialog import SvnDiffDialog
            self.diff = SvnDiffDialog(self)
            self.diff.show()
            QApplication.processEvents()
            self.diff.start(name, revisions)
        
    def svnUrlDiff(self, name):
        """
        Public method used to view the difference of a file/directory of two
        repository URLs.
        
        If name is a directory and is the project directory, all project files
        are saved first. If name is a file (or list of files), which is/are
        being edited and has unsaved modification, they can be saved or the
        operation may be aborted.
        
        This method gives the chance to enter the revisions to be compared.
        
        @param name file/directory name to be diffed (string)
        """
        if isinstance(name, list):
            names = name[:]
        else:
            names = [name]
        for nam in names:
            if os.path.isfile(nam):
                editor = e5App().getObject("ViewManager").getOpenEditor(nam)
                if editor and not editor.checkDirty():
                    return
            else:
                project = e5App().getObject("Project")
                if nam == project.ppath and not project.saveAllScripts():
                    return
        
        dname = self.splitPath(names[0])[0]
        
        from .SvnUrlSelectionDialog import SvnUrlSelectionDialog
        dlg = SvnUrlSelectionDialog(self, self.tagsList, self.branchesList,
                                    dname)
        if dlg.exec_() == QDialog.Accepted:
            urls, summary = dlg.getURLs()
            from .SvnDiffDialog import SvnDiffDialog
            self.diff = SvnDiffDialog(self)
            self.diff.show()
            QApplication.processEvents()
            self.diff.start(name, urls=urls, summary=summary)
        
    def __svnGetFileForRevision(self, name, rev=""):
        """
        Private method to get a file for a specific revision from the
        repository.
        
        @param name file name to get from the repository (string)
        @keyparam rev revision to retrieve (integer or string)
        @return contents of the file (string) and an error message (string)
        """
        output = ""
        error = ""
        
        client = self.getClient()
        try:
            if rev:
                if isinstance(rev, int) or rev.isdecimal():
                    rev = pysvn.Revision(
                        pysvn.opt_revision_kind.number, int(rev))
                elif rev.startswith("{"):
                    dateStr = rev[1:-1]
                    secs = QDateTime.fromString(dateStr, Qt.ISODate).toTime_t()
                    rev = pysvn.Revision(pysvn.opt_revision_kind.date, secs)
                elif rev == "HEAD":
                    rev = pysvn.Revision(pysvn.opt_revision_kind.head)
                elif rev == "COMMITTED":
                    rev = pysvn.Revision(pysvn.opt_revision_kind.committed)
                elif rev == "BASE":
                    rev = pysvn.Revision(pysvn.opt_revision_kind.base)
                elif rev == "WORKING":
                    rev = pysvn.Revision(pysvn.opt_revision_kind.working)
                elif rev == "PREV":
                    rev = pysvn.Revision(pysvn.opt_revision_kind.previous)
                else:
                    rev = pysvn.Revision(pysvn.opt_revision_kind.unspecified)
                output = client.cat(name, revision=rev)
            else:
                output = client.cat(name)
            output = output.decode('utf-8')
        except pysvn.ClientError as e:
            error = str(e)
        
        return output, error
    
    def svnSbsDiff(self, name, extended=False, revisions=None):
        """
        Public method used to view the difference of a file to the Mercurial
        repository side-by-side.
        
        @param name file name to be diffed (string)
        @keyparam extended flag indicating the extended variant (boolean)
        @keyparam revisions tuple of two revisions (tuple of strings)
        @exception ValueError raised to indicate an invalid name parameter type
        """
        if isinstance(name, list):
            raise ValueError("Wrong parameter type")
        
        if extended:
            from .SvnRevisionSelectionDialog import SvnRevisionSelectionDialog
            dlg = SvnRevisionSelectionDialog()
            if dlg.exec_() == QDialog.Accepted:
                rev1, rev2 = dlg.getRevisions()
                if rev1 == "WORKING":
                    rev1 = ""
                if rev2 == "WORKING":
                    rev2 = ""
        elif revisions:
            rev1, rev2 = revisions[0], revisions[1]
        else:
            rev1, rev2 = "", ""
        
        output1, error = self.__svnGetFileForRevision(name, rev=rev1)
        if error:
            E5MessageBox.critical(
                self.__ui,
                self.tr("Subversion Side-by-Side Difference"),
                error)
            return
        name1 = "{0} (rev. {1})".format(name, rev1 and rev1 or ".")
        
        if rev2:
            output2, error = self.__svnGetFileForRevision(name, rev=rev2)
            if error:
                E5MessageBox.critical(
                    self.__ui,
                    self.tr("Subversion Side-by-Side Difference"),
                    error)
                return
            name2 = "{0} (rev. {1})".format(name, rev2)
        else:
            try:
                f1 = open(name, "r", encoding="utf-8")
                output2 = f1.read()
                f1.close()
                name2 = name
            except IOError:
                E5MessageBox.critical(
                    self.__ui,
                    self.tr("Subversion Side-by-Side Difference"),
                    self.tr(
                        """<p>The file <b>{0}</b> could not be read.</p>""")
                    .format(name))
                return
        
        if self.sbsDiff is None:
            from UI.CompareDialog import CompareDialog
            self.sbsDiff = CompareDialog()
        self.sbsDiff.show()
        self.sbsDiff.compare(output1, output2, name1, name2)
    
    def vcsLogBrowser(self, name, isFile=False):
        """
        Public method used to browse the log of a file/directory from the
        Subversion repository.
        
        @param name file/directory name to show the log of (string)
        @param isFile flag indicating log for a file is to be shown (boolean)
        """
        if self.logBrowser is None:
            from .SvnLogBrowserDialog import SvnLogBrowserDialog
            self.logBrowser = SvnLogBrowserDialog(self)
        self.logBrowser.show()
        QApplication.processEvents()
        self.logBrowser.start(name, isFile=isFile)
        
    def svnLock(self, name, stealIt=False, parent=None):
        """
        Public method used to lock a file in the Subversion repository.
        
        @param name file/directory name to be locked (string or list of
            strings)
        @param stealIt flag indicating a forced operation (boolean)
        @param parent reference to the parent object of the subversion dialog
            (QWidget)
        """
        comment, ok = QInputDialog.getText(
            None,
            self.tr("Subversion Lock"),
            self.tr("Enter lock comment"),
            QLineEdit.Normal)
        
        if not ok:
            return
        
        if isinstance(name, list):
            dname, fnames = self.splitPathList(name)
        else:
            dname, fname = self.splitPath(name)
            fnames = [fname]
        
        locker = QMutexLocker(self.vcsExecutionMutex)
        cwd = os.getcwd()
        os.chdir(dname)
        client = self.getClient()
        dlg = \
            SvnDialog(
                self.tr('Locking in the Subversion repository'),
                "lock{0}{1} {2}".format(
                    stealIt and " --force" or "",
                    comment and (" --message {0}".format(comment)) or "",
                    " ".join(fnames)),
                client, parent=parent)
        QApplication.processEvents()
        try:
            client.lock(fnames, comment, force=stealIt)
        except pysvn.ClientError as e:
            dlg.showError(e.args[0])
        except AttributeError as e:
            dlg.showError(str(e))
        locker.unlock()
        dlg.finish()
        dlg.exec_()
        os.chdir(cwd)
        
    def svnUnlock(self, name, breakIt=False, parent=None):
        """
        Public method used to unlock a file in the Subversion repository.
        
        @param name file/directory name to be unlocked (string or list of
            strings)
        @param breakIt flag indicating a forced operation (boolean)
        @param parent reference to the parent object of the subversion dialog
            (QWidget)
        """
        if isinstance(name, list):
            dname, fnames = self.splitPathList(name)
        else:
            dname, fname = self.splitPath(name)
            fnames = [fname]
        
        locker = QMutexLocker(self.vcsExecutionMutex)
        cwd = os.getcwd()
        os.chdir(dname)
        client = self.getClient()
        dlg = \
            SvnDialog(
                self.tr('Unlocking in the Subversion repository'),
                "unlock{0} {1}".format(
                    breakIt and " --force" or "",
                    " ".join(fnames)),
                client, parent=parent)
        QApplication.processEvents()
        try:
            client.unlock(fnames, force=breakIt)
        except pysvn.ClientError as e:
            dlg.showError(e.args[0])
        except AttributeError as e:
            dlg.showError(str(e))
        locker.unlock()
        dlg.finish()
        dlg.exec_()
        os.chdir(cwd)
        
    def svnInfo(self, projectPath, name):
        """
        Public method to show repository information about a file or directory.
        
        @param projectPath path name of the project (string)
        @param name file/directory name relative to the project (string)
        """
        from .SvnInfoDialog import SvnInfoDialog
        dlg = SvnInfoDialog(self)
        dlg.start(projectPath, name)
        dlg.exec_()
        
    def svnRelocate(self, projectPath):
        """
        Public method to relocate the working copy to a new repository URL.
        
        @param projectPath path name of the project (string)
        """
        from .SvnRelocateDialog import SvnRelocateDialog
        currUrl = self.svnGetReposName(projectPath)
        dlg = SvnRelocateDialog(currUrl)
        if dlg.exec_() == QDialog.Accepted:
            newUrl, inside = dlg.getData()
            if inside:
                msg = "switch {0} {1}".format(newUrl, projectPath)
            else:
                msg = "relocate {0} {1} {2}".format(currUrl, newUrl,
                                                    projectPath)
            client = self.getClient()
            dlg = \
                SvnDialog(self.tr('Relocating'), msg, client)
            QApplication.processEvents()
            locker = QMutexLocker(self.vcsExecutionMutex)
            try:
                if inside:
                    client.switch(projectPath, newUrl)
                else:
                    client.relocate(currUrl, newUrl, projectPath, recurse=True)
            except pysvn.ClientError as e:
                dlg.showError(e.args[0])
            locker.unlock()
            dlg.finish()
            dlg.exec_()
        
    def svnRepoBrowser(self, projectPath=None):
        """
        Public method to open the repository browser.
        
        @param projectPath path name of the project (string)
        """
        if projectPath:
            url = self.svnGetReposName(projectPath)
        else:
            url = None
        
        if url is None:
            url, ok = QInputDialog.getText(
                None,
                self.tr("Repository Browser"),
                self.tr("Enter the repository URL."),
                QLineEdit.Normal)
            if not ok or not url:
                return
        
        from .SvnRepoBrowserDialog import SvnRepoBrowserDialog
        self.repoBrowser = SvnRepoBrowserDialog(self)
        self.repoBrowser.start(url)
        
    def svnRemoveFromChangelist(self, names):
        """
        Public method to remove a file or directory from its changelist.
        
        Note: Directories will be removed recursively.
        
        @param names name or list of names of file or directory to remove
            (string)
        """
        if not isinstance(names, list):
            names = [names]
        client = self.getClient()
        dlg = \
            SvnDialog(self.tr('Remove from changelist'),
                      "changelist --remove {0}".format(" ".join(names)),
                      client)
        QApplication.processEvents()
        locker = QMutexLocker(self.vcsExecutionMutex)
        try:
            for name in names:
                client.remove_from_changelists(name)
        except pysvn.ClientError as e:
            dlg.showError(e.args[0])
        locker.unlock()
        dlg.finish()
        dlg.exec_()
        
    def svnAddToChangelist(self, names):
        """
        Public method to add a file or directory to a changelist.
        
        Note: Directories will be added recursively.
        
        @param names name or list of names of file or directory to add
            (string)
        """
        if not isinstance(names, list):
            names = [names]
        
        clname, ok = QInputDialog.getItem(
            None,
            self.tr("Add to changelist"),
            self.tr("Enter name of the changelist:"),
            sorted(self.svnGetChangelists()),
            0, True)
        if not ok or not clname:
            return

        client = self.getClient()
        dlg = \
            SvnDialog(self.tr('Add to changelist'),
                      "changelist {0}".format(" ".join(names)),
                      client)
        QApplication.processEvents()
        locker = QMutexLocker(self.vcsExecutionMutex)
        try:
            for name in names:
                client.add_to_changelist(name, clname,
                                         depth=pysvn.depth.infinity)
        except pysvn.ClientError as e:
            dlg.showError(e.args[0])
        locker.unlock()
        dlg.finish()
        dlg.exec_()
    
    def svnShowChangelists(self, path):
        """
        Public method used to inspect the change lists defined for the project.
        
        @param path directory name to show change lists for (string)
        """
        from .SvnChangeListsDialog import SvnChangeListsDialog
        self.changeLists = SvnChangeListsDialog(self)
        self.changeLists.show()
        QApplication.processEvents()
        self.changeLists.start(path)
        
    def svnGetChangelists(self):
        """
        Public method to get a list of all defined change lists.
        
        @return list of defined change list names (list of strings)
        """
        changelists = []
        client = self.getClient()
        if hasattr(client, 'get_changelist'):
            ppath = e5App().getObject("Project").getProjectPath()
            locker = QMutexLocker(self.vcsExecutionMutex)
            try:
                entries = client.get_changelist(ppath,
                                                depth=pysvn.depth.infinity)
                for entry in entries:
                    changelist = entry[1]
                    if sys.version_info[0] == 2:
                        changelist = changelist.decode('utf-8')
                    if changelist not in changelists:
                        changelists.append(changelist)
            except pysvn.ClientError:
                pass
            locker.unlock()
        
        return changelists
        
    def svnUpgrade(self, path):
        """
        Public method to upgrade the working copy format.
        
        @param path directory name to show change lists for (string)
        """
        client = self.getClient()
        dlg = \
            SvnDialog(self.tr('Upgrade'),
                      "upgrade {0}".format(path),
                      client)
        QApplication.processEvents()
        locker = QMutexLocker(self.vcsExecutionMutex)
        try:
            client.upgrade(path)
        except pysvn.ClientError as e:
            dlg.showError(e.args[0])
        locker.unlock()
        dlg.finish()
        dlg.exec_()

    ###########################################################################
    ## Private Subversion specific methods are below.
    ###########################################################################
    
    def __svnURL(self, url):
        """
        Private method to format a url for subversion.
        
        @param url unformatted url string (string)
        @return properly formated url for subversion (string)
        """
        url = self.svnNormalizeURL(url)
        url = url.split(':', 2)
        if len(url) == 3:
            scheme = url[0]
            host = url[1]
            port, path = url[2].split("/", 1)
            return "{0}:{1}:{2}/{3}".format(scheme, host, port,
                                            Utilities.quote(path))
        else:
            scheme = url[0]
            if scheme == "file":
                return "{0}:{1}".format(scheme, Utilities.quote(url[1]))
            else:
                try:
                    host, path = url[1][2:].split("/", 1)
                except ValueError:
                    host = url[1][2:]
                    path = ""
                return "{0}://{1}/{2}".format(scheme, host,
                                              Utilities.quote(path))

    def svnNormalizeURL(self, url):
        """
        Public method to normalize a url for subversion.
        
        @param url url string (string)
        @return properly normalized url for subversion (string)
        """
        protocol, url = url.split("://", 1)
        if url.startswith("\\\\"):
            url = url[2:]
        if protocol == "file":
            url = os.path.normcase(url)
            if url[1] == ":":
                url = url.replace(":", "|", 1)
        url = url.replace('\\', '/')
        if url.endswith('/'):
            url = url[:-1]
        if not url.startswith("/") and url[1] in [":", "|"]:
            url = "/{0}".format(url)
        return "{0}://{1}".format(protocol, url)

    ###########################################################################
    ## Methods to get the helper objects are below.
    ###########################################################################
    
    def vcsGetProjectBrowserHelper(self, browser, project,
                                   isTranslationsBrowser=False):
        """
        Public method to instanciate a helper object for the different
        project browsers.
        
        @param browser reference to the project browser object
        @param project reference to the project object
        @param isTranslationsBrowser flag indicating, the helper is requested
            for the translations browser (this needs some special treatment)
        @return the project browser helper object
        """
        from .ProjectBrowserHelper import SvnProjectBrowserHelper
        return SvnProjectBrowserHelper(self, browser, project,
                                       isTranslationsBrowser)
        
    def vcsGetProjectHelper(self, project):
        """
        Public method to instanciate a helper object for the project.
        
        @param project reference to the project object
        @return the project helper object
        """
        helper = self.__plugin.getProjectHelper()
        helper.setObjects(self, project)
        self.__wcng = \
            os.path.exists(
                os.path.join(project.getProjectPath(), ".svn", "format")) or \
            os.path.exists(
                os.path.join(project.getProjectPath(), "_svn", "format")) or \
            os.path.exists(
                os.path.join(project.getProjectPath(), ".svn", "wc.db")) or \
            os.path.exists(
                os.path.join(project.getProjectPath(), "_svn", "wc.db"))
        return helper

    ###########################################################################
    ##  Status Monitor Thread methods
    ###########################################################################

    def _createStatusMonitorThread(self, interval, project):
        """
        Protected method to create an instance of the VCS status monitor
        thread.
        
        @param interval check interval for the monitor thread in seconds
            (integer)
        @param project reference to the project object
        @return reference to the monitor thread (QThread)
        """
        from .SvnStatusMonitorThread import SvnStatusMonitorThread
        return SvnStatusMonitorThread(interval, project, self)
