eric: Project/ProjectTranslationsBrowser.py@da76c71624de

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

# Copyright (c) 2002 - 2013 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing a class used to display the translations part of the project.
"""

import os
import shutil
import fnmatch

from PyQt4.QtCore import pyqtSignal, QProcess
from PyQt4.QtGui import QDialog, QMenu

from E5Gui import E5MessageBox
from E5Gui.E5Application import e5App

from .ProjectBrowserModel import ProjectBrowserFileItem, \
    ProjectBrowserSimpleDirectoryItem, ProjectBrowserDirectoryItem, \
    ProjectBrowserTranslationType
from .ProjectBaseBrowser import ProjectBaseBrowser

import UI.PixmapCache

import Preferences
import Utilities


class ProjectTranslationsBrowser(ProjectBaseBrowser):
    """
    A class used to display the translations part of the project.

    @signal linguistFile(str) emitted to open a translation file with
            Qt-Linguist
    @signal appendStdout(str) emitted after something was received from
            a QProcess on stdout
    @signal appendStderr(str) emitted after something was received from
            a QProcess on stderr
    @signal sourceFile(str) emitted to open a translation file in an editor
    @signal closeSourceWindow(str) emitted after a file has been removed/deleted
            from the project
    @signal trpreview(list of str, bool = False) emitted to preview translations in the
            translations previewer
    @signal showMenu(str, QMenu) emitted when a menu is about to be shown. The name
            of the menu and a reference to the menu are given.
    """
    appendStdout = pyqtSignal(str)
    appendStderr = pyqtSignal(str)
    showMenu = pyqtSignal(str, QMenu)

    def __init__(self, project, parent=None):
        """
        Constructor

        @param project reference to the project object
        @param parent parent widget of this browser (QWidget)
        """
        ProjectBaseBrowser.__init__(self, project, ProjectBrowserTranslationType, parent)
        self.isTranslationsBrowser = True

        self.selectedItemsFilter = \
            [ProjectBrowserFileItem, ProjectBrowserSimpleDirectoryItem]

        self.setWindowTitle(self.trUtf8('Translations'))

        self.setWhatsThis(self.trUtf8(
            """<b>Project Translations Browser</b>"""
            """<p>This allows to easily see all translations contained in the current"""
            """ project. Several actions can be executed via the context menu.</p>"""
        ))

        self.lreleaseProc = None
        self.lreleaseProcRunning = False
        self.pylupdateProc = None
        self.pylupdateProcRunning = False

    def _createPopupMenus(self):
        """
        Protected overloaded method to generate the popup menu.
        """
        self.menuActions = []
        self.multiMenuActions = []
        self.dirMenuActions = []
        self.dirMultiMenuActions = []

        self.tsMenuActions = []
        self.qmMenuActions = []
        self.tsprocMenuActions = []
        self.qmprocMenuActions = []

        self.tsMultiMenuActions = []
        self.qmMultiMenuActions = []
        self.tsprocMultiMenuActions = []
        self.qmprocMultiMenuActions = []

        self.tsprocDirMenuActions = []
        self.qmprocDirMenuActions = []

        self.tsprocBackMenuActions = []
        self.qmprocBackMenuActions = []

        self.menu = QMenu(self)
        if self.project.getProjectType() in \
                ["Qt4", "Qt4C", "E4Plugin", "PySide", "PySideC"]:
            act = self.menu.addAction(self.trUtf8('Generate translation'),
                self.__generateSelected)
            self.tsMenuActions.append(act)
            self.tsprocMenuActions.append(act)
            act = self.menu.addAction(
                self.trUtf8('Generate translation (with obsolete)'),
                self.__generateObsoleteSelected)
            self.tsMenuActions.append(act)
            self.tsprocMenuActions.append(act)
            act = self.menu.addAction(self.trUtf8('Generate all translations'),
                self.__generateAll)
            self.tsprocMenuActions.append(act)
            act = self.menu.addAction(
                self.trUtf8('Generate all translations (with obsolete)'),
                self.__generateObsoleteAll)
            self.tsprocMenuActions.append(act)
            self.menu.addSeparator()
            act = self.menu.addAction(self.trUtf8('Open in Qt-Linguist'),
                self._openItem)
            self.tsMenuActions.append(act)
            act = self.menu.addAction(self.trUtf8('Open in Editor'),
                self.__openFileInEditor)
            self.tsMenuActions.append(act)
            self.menu.addSeparator()
            act = self.menu.addAction(self.trUtf8('Release translation'),
                self.__releaseSelected)
            self.tsMenuActions.append(act)
            self.qmprocMenuActions.append(act)
            act = self.menu.addAction(self.trUtf8('Release all translations'),
                self.__releaseAll)
            self.qmprocMenuActions.append(act)
            self.menu.addSeparator()
            act = self.menu.addAction(self.trUtf8('Preview translation'),
                self.__TRPreview)
            self.qmMenuActions.append(act)
            act = self.menu.addAction(self.trUtf8('Preview all translations'),
                self.__TRPreviewAll)
            self.menu.addSeparator()
        else:
            if self.hooks["extractMessages"] is not None:
                act = self.menu.addAction(
                    self.hooksMenuEntries.get("extractMessages",
                        self.trUtf8('Extract messages')),
                    self.__extractMessages)
                self.menuActions.append(act)
                self.menu.addSeparator()
            if self.hooks["generateSelected"] is not None:
                act = self.menu.addAction(
                    self.hooksMenuEntries.get("generateSelected",
                        self.trUtf8('Generate translation')),
                    self.__generateSelected)
                self.tsMenuActions.append(act)
                self.tsprocMenuActions.append(act)
            if self.hooks["generateSelectedWithObsolete"] is not None:
                act = self.menu.addAction(
                    self.hooksMenuEntries.get("generateSelectedWithObsolete",
                        self.trUtf8('Generate translation (with obsolete)')),
                    self.__generateObsoleteSelected)
                self.tsMenuActions.append(act)
                self.tsprocMenuActions.append(act)
            if self.hooks["generateAll"] is not None:
                act = self.menu.addAction(
                    self.hooksMenuEntries.get("generateAll",
                        self.trUtf8('Generate all translations')),
                    self.__generateAll)
                self.tsprocMenuActions.append(act)
            if self.hooks["generateAllWithObsolete"] is not None:
                act = self.menu.addAction(
                    self.hooksMenuEntries.get("generateAllWithObsolete",
                        self.trUtf8('Generate all translations (with obsolete)')),
                    self.__generateObsoleteAll)
                self.tsprocMenuActions.append(act)
            self.menu.addSeparator()
            act = self.menu.addAction(self.trUtf8('Open in Editor'),
                self.__openFileInEditor)
            self.tsMenuActions.append(act)
            self.menu.addSeparator()
            if self.hooks["releaseSelected"] is not None:
                act = self.menu.addAction(
                    self.hooksMenuEntries.get("releaseSelected",
                        self.trUtf8('Release translation')),
                    self.__releaseSelected)
                self.tsMenuActions.append(act)
                self.qmprocMenuActions.append(act)
            if self.hooks["releaseAll"] is not None:
                act = self.menu.addAction(
                    self.hooksMenuEntries.get("releaseAll",
                        self.trUtf8('Release all translations')),
                    self.__releaseAll)
                self.qmprocMenuActions.append(act)
            self.menu.addSeparator()
        act = self.menu.addAction(self.trUtf8('Remove from project'),
            self.__removeLanguageFile)
        self.menuActions.append(act)
        act = self.menu.addAction(self.trUtf8('Delete'), self.__deleteLanguageFile)
        self.menuActions.append(act)
        self.menu.addSeparator()
        self.__addTranslationAct = self.menu.addAction(
            self.trUtf8('Add translation...'), self.project.addLanguage)
        self.menu.addAction(self.trUtf8('Add translation files...'),
            self.__addTranslationFiles)
        self.menu.addSeparator()
        self.menu.addAction(self.trUtf8('Copy Path to Clipboard'),
            self._copyToClipboard)
        self.menu.addSeparator()
        self.menu.addAction(self.trUtf8('Configure...'), self._configure)

        self.backMenu = QMenu(self)
        if self.project.getProjectType() in \
                ["Qt4", "Qt4C", "E4Plugin", "PySide", "PySideC"]:
            act = self.backMenu.addAction(self.trUtf8('Generate all translations'),
                self.__generateAll)
            self.tsprocBackMenuActions.append(act)
            act = self.backMenu.addAction(
                self.trUtf8('Generate all translations (with obsolete)'),
                self.__generateObsoleteAll)
            self.tsprocBackMenuActions.append(act)
            act = self.backMenu.addAction(self.trUtf8('Release all translations'),
                self.__releaseAll)
            self.qmprocBackMenuActions.append(act)
            self.backMenu.addSeparator()
            act = self.backMenu.addAction(self.trUtf8('Preview all translations'),
                self.__TRPreview)
        else:
            if self.hooks["extractMessages"] is not None:
                act = self.backMenu.addAction(
                    self.hooksMenuEntries.get("extractMessages",
                        self.trUtf8('Extract messages')),
                    self.__extractMessages)
                self.backMenu.addSeparator()
            if self.hooks["generateAll"] is not None:
                act = self.backMenu.addAction(
                    self.hooksMenuEntries.get("generateAll",
                        self.trUtf8('Generate all translations')),
                    self.__generateAll)
                self.tsprocBackMenuActions.append(act)
            if self.hooks["generateAllWithObsolete"] is not None:
                act = self.backMenu.addAction(
                    self.hooksMenuEntries.get("generateAllWithObsolete",
                        self.trUtf8('Generate all translations (with obsolete)')),
                    self.__generateObsoleteAll)
                self.tsprocBackMenuActions.append(act)
            if self.hooks["releaseAll"] is not None:
                act = self.backMenu.addAction(
                    self.hooksMenuEntries.get("releaseAll",
                        self.trUtf8('Release all translations')),
                    self.__releaseAll)
                self.qmprocBackMenuActions.append(act)
        self.backMenu.addSeparator()
        self.__addTranslationBackAct = self.backMenu.addAction(
            self.trUtf8('Add translation...'), self.project.addLanguage)
        self.backMenu.addAction(self.trUtf8('Add translation files...'),
            self.__addTranslationFiles)
        self.backMenu.addSeparator()
        self.backMenu.addAction(self.trUtf8('Configure...'), self._configure)
        self.backMenu.setEnabled(False)

        # create the menu for multiple selected files
        self.multiMenu = QMenu(self)
        if self.project.getProjectType() in \
                ["Qt4", "Qt4C", "E4Plugin", "PySide", "PySideC"]:
            act = self.multiMenu.addAction(self.trUtf8('Generate translations'),
                self.__generateSelected)
            self.tsMultiMenuActions.append(act)
            self.tsprocMultiMenuActions.append(act)
            act = self.multiMenu.addAction(
                self.trUtf8('Generate translations (with obsolete)'),
                self.__generateObsoleteSelected)
            self.tsMultiMenuActions.append(act)
            self.tsprocMultiMenuActions.append(act)
            self.multiMenu.addSeparator()
            act = self.multiMenu.addAction(
                self.trUtf8('Open in Qt-Linguist'), self._openItem)
            self.tsMultiMenuActions.append(act)
            act = self.multiMenu.addAction(self.trUtf8('Open in Editor'),
                self.__openFileInEditor)
            self.tsMultiMenuActions.append(act)
            self.multiMenu.addSeparator()
            act = self.multiMenu.addAction(self.trUtf8('Release translations'),
                self.__releaseSelected)
            self.tsMultiMenuActions.append(act)
            self.qmprocMultiMenuActions.append(act)
            self.multiMenu.addSeparator()
            act = self.multiMenu.addAction(self.trUtf8('Preview translations'),
                self.__TRPreview)
            self.qmMultiMenuActions.append(act)
        else:
            if self.hooks["extractMessages"] is not None:
                act = self.multiMenu.addAction(
                    self.hooksMenuEntries.get("extractMessages",
                        self.trUtf8('Extract messages')),
                    self.__extractMessages)
                self.multiMenuActions.append(act)
                self.multiMenu.addSeparator()
            if self.hooks["generateSelected"] is not None:
                act = self.multiMenu.addAction(
                    self.hooksMenuEntries.get("generateSelected",
                        self.trUtf8('Generate translations')),
                    self.__generateSelected)
                self.tsMultiMenuActions.append(act)
                self.tsprocMultiMenuActions.append(act)
            if self.hooks["generateSelectedWithObsolete"] is not None:
                act = self.multiMenu.addAction(
                    self.hooksMenuEntries.get("generateSelectedWithObsolete",
                        self.trUtf8('Generate translations (with obsolete)')),
                    self.__generateObsoleteSelected)
                self.tsMultiMenuActions.append(act)
                self.tsprocMultiMenuActions.append(act)
            self.multiMenu.addSeparator()
            act = self.multiMenu.addAction(self.trUtf8('Open in Editor'),
                self.__openFileInEditor)
            self.tsMultiMenuActions.append(act)
            self.multiMenu.addSeparator()
            if self.hooks["releaseSelected"] is not None:
                act = self.multiMenu.addAction(
                    self.hooksMenuEntries.get("releaseSelected",
                        self.trUtf8('Release translations')),
                    self.__releaseSelected)
                self.tsMultiMenuActions.append(act)
                self.qmprocMultiMenuActions.append(act)
        self.multiMenu.addSeparator()
        act = self.multiMenu.addAction(self.trUtf8('Remove from project'),
            self.__removeLanguageFile)
        self.multiMenuActions.append(act)
        act = self.multiMenu.addAction(self.trUtf8('Delete'), self.__deleteLanguageFile)
        self.multiMenuActions.append(act)
        self.multiMenu.addSeparator()
        self.multiMenu.addAction(self.trUtf8('Configure...'), self._configure)

        self.dirMenu = QMenu(self)
        if self.project.getProjectType() in \
                ["Qt4", "Qt4C", "E4Plugin", "PySide", "PySideC"]:
            act = self.dirMenu.addAction(self.trUtf8('Generate all translations'),
                self.__generateAll)
            self.tsprocDirMenuActions.append(act)
            act = self.dirMenu.addAction(
                self.trUtf8('Generate all translations (with obsolete)'),
                self.__generateObsoleteAll)
            self.tsprocDirMenuActions.append(act)
            act = self.dirMenu.addAction(self.trUtf8('Release all translations'),
                self.__releaseAll)
            self.qmprocDirMenuActions.append(act)
            self.dirMenu.addSeparator()
            act = self.dirMenu.addAction(self.trUtf8('Preview all translations'),
                self.__TRPreview)
        else:
            if self.hooks["extractMessages"] is not None:
                act = self.dirMenu.addAction(
                    self.hooksMenuEntries.get("extractMessages",
                        self.trUtf8('Extract messages')),
                    self.__extractMessages)
                self.dirMenuActions.append(act)
                self.dirMenu.addSeparator()
            if self.hooks["generateAll"] is not None:
                act = self.dirMenu.addAction(
                    self.hooksMenuEntries.get("generateAll",
                        self.trUtf8('Generate all translations')),
                    self.__generateAll)
                self.tsprocDirMenuActions.append(act)
            if self.hooks["generateAllWithObsolete"] is not None:
                act = self.dirMenu.addAction(
                    self.hooksMenuEntries.get("generateAllWithObsolete",
                        self.trUtf8('Generate all translations (with obsolete)')),
                    self.__generateObsoleteAll)
                self.tsprocDirMenuActions.append(act)
            if self.hooks["releaseAll"] is not None:
                act = self.dirMenu.addAction(
                    self.hooksMenuEntries.get("releaseAll",
                        self.trUtf8('Release all translations')),
                    self.__releaseAll)
                self.qmprocDirMenuActions.append(act)
        self.dirMenu.addSeparator()
        self.__addTranslationDirAct = self.dirMenu.addAction(
            self.trUtf8('Add translation...'), self.project.addLanguage)
        self.dirMenu.addAction(self.trUtf8('Add translation files...'),
            self.__addTranslationFiles)
        self.dirMenu.addSeparator()
        self.dirMenu.addAction(self.trUtf8('Copy Path to Clipboard'),
            self._copyToClipboard)
        self.dirMenu.addSeparator()
        self.dirMenu.addAction(self.trUtf8('Configure...'), self._configure)

        self.dirMultiMenu = None

        self.menu.aboutToShow.connect(self.__showContextMenu)
        self.multiMenu.aboutToShow.connect(self.__showContextMenuMulti)
        self.dirMenu.aboutToShow.connect(self.__showContextMenuDir)
        self.backMenu.aboutToShow.connect(self.__showContextMenuBack)
        self.mainMenu = self.menu

    def _contextMenuRequested(self, coord):
        """
        Protected slot to show the context menu.

        @param coord the position of the mouse pointer (QPoint)
        """
        if not self.project.isOpen():
            return

        try:
            categories = self.getSelectedItemsCountCategorized(
                [ProjectBrowserFileItem, ProjectBrowserSimpleDirectoryItem])
            cnt = categories["sum"]
            if cnt <= 1:
                index = self.indexAt(coord)
                if index.isValid():
                    self._selectSingleItem(index)
                    categories = self.getSelectedItemsCountCategorized(
                        [ProjectBrowserFileItem, ProjectBrowserSimpleDirectoryItem])
                    cnt = categories["sum"]

            bfcnt = categories[str(ProjectBrowserFileItem)]
            sdcnt = categories[str(ProjectBrowserSimpleDirectoryItem)]
            if cnt > 1 and cnt == bfcnt:
                self.multiMenu.popup(self.mapToGlobal(coord))
            else:
                index = self.indexAt(coord)
                if cnt == 1 and index.isValid():
                    if bfcnt == 1:
                        self.menu.popup(self.mapToGlobal(coord))
                    elif sdcnt == 1:
                        self.dirMenu.popup(self.mapToGlobal(coord))
                    else:
                        self.backMenu.popup(self.mapToGlobal(coord))
                else:
                    self.backMenu.popup(self.mapToGlobal(coord))
        except:
            pass

    def __showContextMenu(self):
        """
        Private slot called by the menu aboutToShow signal.
        """
        if self.project.getProjectType() in \
                ["Qt4", "Qt4C", "E4Plugin", "PySide", "PySideC"]:
            tsFiles = 0
            qmFiles = 0
            itmList = self.getSelectedItems()
            for itm in itmList[:]:
                if itm.fileName().endswith('.ts'):
                    tsFiles += 1
                elif itm.fileName().endswith('.qm'):
                    qmFiles += 1
            if (tsFiles > 0 and qmFiles > 0) or \
               (tsFiles == 0 and qmFiles == 0):
                for act in self.tsMenuActions + self.qmMenuActions:
                    act.setEnabled(False)
            elif tsFiles > 0:
                for act in self.tsMenuActions:
                    act.setEnabled(True)
                for act in self.qmMenuActions:
                    act.setEnabled(False)
            elif qmFiles > 0:
                for act in self.tsMenuActions:
                    act.setEnabled(False)
                for act in self.qmMenuActions:
                    act.setEnabled(True)
            if self.pylupdateProcRunning:
                for act in self.tsprocMenuActions:
                    act.setEnabled(False)
            if self.lreleaseProcRunning:
                for act in self.qmprocMenuActions:
                    act.setEnabled(True)
        self.__addTranslationAct.setEnabled(self.project.getTranslationPattern() != "")

        ProjectBaseBrowser._showContextMenu(self, self.menu)

        self.showMenu.emit("Main", self.menu)

    def __showContextMenuMulti(self):
        """
        Private slot called by the multiMenu aboutToShow signal.
        """
        if self.project.getProjectType() in \
                ["Qt4", "Qt4C", "E4Plugin", "PySide", "PySideC"]:
            tsFiles = 0
            qmFiles = 0
            itmList = self.getSelectedItems()
            for itm in itmList[:]:
                if itm.fileName().endswith('.ts'):
                    tsFiles += 1
                elif itm.fileName().endswith('.qm'):
                    qmFiles += 1
            if (tsFiles > 0 and qmFiles > 0) or \
               (tsFiles == 0 and qmFiles == 0):
                for act in self.tsMultiMenuActions + self.qmMultiMenuActions:
                    act.setEnabled(False)
            elif tsFiles > 0:
                for act in self.tsMultiMenuActions:
                    act.setEnabled(True)
                for act in self.qmMultiMenuActions:
                    act.setEnabled(False)
            elif qmFiles > 0:
                for act in self.tsMultiMenuActions:
                    act.setEnabled(False)
                for act in self.qmMultiMenuActions:
                    act.setEnabled(True)
            if self.pylupdateProcRunning:
                for act in self.tsprocMultiMenuActions:
                    act.setEnabled(False)
            if self.lreleaseProcRunning:
                for act in self.qmprocMultiMenuActions:
                    act.setEnabled(True)

        ProjectBaseBrowser._showContextMenuMulti(self, self.multiMenu)

        self.showMenu.emit("MainMulti", self.multiMenu)

    def __showContextMenuDir(self):
        """
        Private slot called by the dirMenu aboutToShow signal.
        """
        if self.project.getProjectType() in \
                ["Qt4", "Qt4C", "E4Plugin", "PySide", "PySideC"]:
            if self.pylupdateProcRunning:
                for act in self.tsprocDirMenuActions:
                    act.setEnabled(False)
            if self.lreleaseProcRunning:
                for act in self.qmprocDirMenuActions:
                    act.setEnabled(True)
        self.__addTranslationDirAct.setEnabled(self.project.getTranslationPattern() != "")

        ProjectBaseBrowser._showContextMenuDir(self, self.dirMenu)

        self.showMenu.emit("MainDir", self.dirMenu)

    def __showContextMenuBack(self):
        """
        Private slot called by the backMenu aboutToShow signal.
        """
        if self.project.getProjectType() in \
                ["Qt4", "Qt4C", "E4Plugin", "PySide", "PySideC"]:
            if self.pylupdateProcRunning:
                for act in self.tsprocBackMenuActions:
                    act.setEnabled(False)
            if self.lreleaseProcRunning:
                for act in self.qmprocBackMenuActions:
                    act.setEnabled(True)
        self.__addTranslationBackAct.setEnabled(
            self.project.getTranslationPattern() != "")

        self.showMenu.emit("MainBack", self.backMenu)

    def __addTranslationFiles(self):
        """
        Private method to add translation files to the project.
        """
        itm = self.model().item(self.currentIndex())
        if isinstance(itm, ProjectBrowserFileItem):
            dn = os.path.dirname(itm.fileName())
        elif isinstance(itm, ProjectBrowserSimpleDirectoryItem) or \
             isinstance(itm, ProjectBrowserDirectoryItem):
            dn = itm.dirName()
        else:
            dn = None
        self.project.addFiles('translation', dn)

    def _openItem(self):
        """
        Protected slot to handle the open popup menu entry.
        """
        itmList = self.getSelectedItems()
        for itm in itmList:
            if isinstance(itm, ProjectBrowserFileItem):
                if itm.isLinguistFile():
                    if itm.fileExt() == '.ts':
                        self.linguistFile.emit(itm.fileName())
                    else:
                        self.trpreview.emit([itm.fileName()])
                else:
                    self.sourceFile.emit(itm.fileName())

    def __openFileInEditor(self):
        """
        Private slot to handle the Open in Editor menu action.
        """
        itmList = self.getSelectedItems()
        for itm in itmList[:]:
            self.sourceFile.emit(itm.fileName())

    def __removeLanguageFile(self):
        """
        Private method to remove a translation from the project.
        """
        itmList = self.getSelectedItems()

        for itm in itmList[:]:
            fn = itm.fileName()
            self.closeSourceWindow.emit(fn)
            self.project.removeLanguageFile(fn)

    def __deleteLanguageFile(self):
        """
        Private method to delete a translation file from the project.
        """
        itmList = self.getSelectedItems()

        translationFiles = [itm.fileName() for itm in itmList]

        from UI.DeleteFilesConfirmationDialog import DeleteFilesConfirmationDialog
        dlg = DeleteFilesConfirmationDialog(self.parent(),
            self.trUtf8("Delete translation files"),
            self.trUtf8("Do you really want to delete these translation files"
                " from the project?"),
            translationFiles)

        if dlg.exec_() == QDialog.Accepted:
            for fn in translationFiles:
                self.closeSourceWindow.emit(fn)
                self.project.deleteLanguageFile(fn)

    def __TRPreview(self, previewAll=False):
        """
        Private slot to handle the Preview translations action.

        @param previewAll flag indicating, that all translations
            should be previewed (boolean)
        """
        fileNames = []
        itmList = self.getSelectedItems()
        if itmList and not previewAll:
            for itm in itmList:
                if isinstance(itm, ProjectBrowserSimpleDirectoryItem):
                    dname = self.project.getRelativePath(itm.dirName())
                    trfiles = sorted(self.project.pdata["TRANSLATIONS"][:])
                    for trfile in trfiles:
                        if trfile.startswith(dname):
                            if trfile not in fileNames:
                                fileNames.append(os.path.join(self.project.ppath, trfile))
                else:
                    fn = itm.fileName()
                    if fn not in fileNames:
                        fileNames.append(os.path.join(self.project.ppath, fn))
        else:
            trfiles = sorted(self.project.pdata["TRANSLATIONS"][:])
            fileNames.extend([os.path.join(self.project.ppath, trfile) \
                              for trfile in trfiles \
                              if trfile.endswith('.qm')])
        self.trpreview[list, bool].emit(fileNames, True)

    def __TRPreviewAll(self):
        """
        Private slot to handle the Preview all translations action.
        """
        self.__TRPreview(True)

    ############################################################################
    ##  Methods to support the generation and release commands
    ############################################################################

    def __writeTempProjectFile(self, langs, filter):
        """
        Private method to write a temporary project file suitable for pylupdate and
        lrelease.

        @param langs list of languages to include in the process. An empty list (default)
            means that all translations should be included.
            (list of ProjectBrowserFileItem)
        @param filter list of source file extension that should be considered
            (list of strings)
        @return flag indicating success
        """
        path, ext = os.path.splitext(self.project.pfile)
        pfile = '{0}_e4x.pro'.format(path)

        # only consider files satisfying the filter criteria
        _sources = [s for s in self.project.pdata["SOURCES"] \
                   if os.path.splitext(s)[1] in filter]
        sources = []
        for s in _sources:
            addIt = True
            for transExcept in self.project.pdata["TRANSLATIONEXCEPTIONS"]:
                if s.startswith(transExcept):
                    addIt = False
                    break
            if addIt:
                sources.append(s)
        sections = [("SOURCES", sources)]

        _forms = [f for f in self.project.pdata["FORMS"] if f.endswith('.ui')]
        forms = []
        for f in _forms:
            addIt = True
            for transExcept in self.project.pdata["TRANSLATIONEXCEPTIONS"]:
                if f.startswith(transExcept):
                    addIt = False
                    break
            if addIt:
                forms.append(f)
        sections.append(("FORMS", forms))

        if langs:
            l = [self.project.getRelativePath(lang.fileName()) \
                 for lang in langs if lang.fileName().endswith('.ts')]
        else:
            try:
                pattern = self.project.pdata["TRANSLATIONPATTERN"][0]\
                          .replace("%language%", "*")
                l = [lang for lang in self.project.pdata["TRANSLATIONS"] \
                     if fnmatch.fnmatch(lang, pattern)]
            except IndexError:
                l = []
        if l:
            sections.append(("TRANSLATIONS", l))
        else:
            E5MessageBox.warning(self,
                self.trUtf8("Write temporary project file"),
                self.trUtf8("""No translation files (*.ts) selected."""))
            return False

        try:
            pf = open(pfile, "w", encoding="utf-8")
            for key, list in sections:
                if len(list) > 0:
                    pf.write('{0} = '.format(key))
                    last = len(list) - 1
                    if last > 0:
                        pf.write('{0} \\{1}'.format(
                            list[0].replace(os.sep, '/'), "\n"))
                        for i in range(1, last):
                            pf.write('\t{0} \\{1}'.format(
                                list[i].replace(os.sep, '/'), "\n"))
                        pf.write('\t{0} {1}{2}'.format(
                            list[last].replace(os.sep, '/'), "\n", "\n"))
                    else:
                        pf.write('{0} {1}{2}'.format(
                            list[0].replace(os.sep, '/'), "\n", "\n"))

            pf.close()
            self.tmpProject = pfile
            return True
        except IOError:
            E5MessageBox.critical(self,
                self.trUtf8("Write temporary project file"),
                self.trUtf8("<p>The temporary project file <b>{0}</b> could not"
                    " be written.</p>").format(pfile))
            self.tmpProject = None
            return False

    def __readStdoutLupdate(self):
        """
        Private slot to handle the readyReadStandardOutput signal of the
        pylupdate process.
        """
        if self.pylupdateProc is not None:
            self.__readStdout(self.pylupdateProc, '{0}: '.format(self.pylupdate))
        else:
            return

    def __readStdoutLrelease(self):
        """
        Private slot to handle the readyReadStandardOutput signal of the
        lrelease process.
        """
        if self.lreleaseProc is not None:
            self.__readStdout(self.lreleaseProc, 'lrelease: ')
        else:
            return

    def __readStdout(self, proc, ps):
        """
        Private method to read from a process' stdout channel.

        @param proc process to read from (QProcess)
        @param ps prompt string (string)
        """
        ioEncoding = Preferences.getSystem("IOEncoding")

        proc.setReadChannel(QProcess.StandardOutput)
        while proc and proc.canReadLine():
            s = ps
            output = str(proc.readLine(), ioEncoding, 'replace')
            s += output
            self.appendStdout.emit(s)

    def __readStderrLupdate(self):
        """
        Private slot to handle the readyReadStandardError signal of the
        pylupdate process.
        """
        if self.pylupdateProc is not None:
            self.__readStderr(self.pylupdateProc, '{0}: '.format(self.pylupdate))
        else:
            return

    def __readStderrLrelease(self):
        """
        Private slot to handle the readyReadStandardError signal of the
        lrelease process.
        """
        if self.lreleaseProc is not None:
            self.__readStderr(self.lreleaseProc, 'lrelease: ')
        else:
            return

    def __readStderr(self, proc, ps):
        """
        Private method to read from a process' stderr channel.

        @param proc process to read from (QProcess)
        @param ps propmt string (string)
        """
        ioEncoding = Preferences.getSystem("IOEncoding")

        proc.setReadChannel(QProcess.StandardError)
        while proc and proc.canReadLine():
            s = ps
            error = str(proc.readLine(), ioEncoding, 'replace')
            s += error
            self.appendStderr.emit(s)

    ############################################################################
    ##  Methods for the generation commands
    ############################################################################

    def __extractMessages(self):
        """
        Private slot to extract the messages to form a messages template file.
        """
        if self.hooks["extractMessages"] is not None:
            self.hooks["extractMessages"]()

    def __generateTSFileDone(self, exitCode, exitStatus):
        """
        Private slot to handle the finished signal of the pylupdate process.

        @param exitCode exit code of the process (integer)
        @param exitStatus exit status of the process (QProcess.ExitStatus)
        """
        self.pylupdateProcRunning = False
        if exitStatus == QProcess.NormalExit and exitCode == 0:
            ui = e5App().getObject("UserInterface")
            if ui.notificationsEnabled():
                ui.showNotification(UI.PixmapCache.getPixmap("linguist48.png"),
                    self.trUtf8("Translation file generation"),
                    self.trUtf8("The generation of the translation files (*.ts)"
                        " was successful."))
            else:
                E5MessageBox.information(self,
                    self.trUtf8("Translation file generation"),
                    self.trUtf8("The generation of the translation files (*.ts)"
                        " was successful."))
        else:
            E5MessageBox.critical(self,
                self.trUtf8("Translation file generation"),
                self.trUtf8("The generation of the translation files (*.ts) has failed."))
        self.pylupdateProc = None
        self.pylupdate = ""
        try:
            os.remove(self.tmpProject)
        except EnvironmentError:
            pass
        self.tmpProject = None

    def __generateTSFile(self, noobsolete=False, generateAll=True):
        """
        Private method used to run pylupdate/pylupdate4 to generate the .ts files.

        @param noobsolete flag indicating whether obsolete entries should be
            kept (boolean)
        @param generateAll flag indicating whether all translations should be
            generated (boolean)
        """
        if generateAll:
            langs = []
        else:
            langs = self.getSelectedItems()

        # Hook support
        if generateAll:
            if noobsolete:
                if self.hooks["generateAll"] is not None:
                    self.hooks["generateAll"](self.project.pdata["TRANSLATIONS"])
                    return
            else:
                if self.hooks["generateAllWithObsolete"] is not None:
                    self.hooks["generateAllWithObsolete"](
                        self.project.pdata["TRANSLATIONS"])
                    return
        else:
            if noobsolete:
                if self.hooks["generateSelected"] is not None:
                    l = [self.project.getRelativePath(lang.fileName()) \
                         for lang in langs]
                    self.hooks["generateSelected"](l)
                    return
            else:
                if self.hooks["generateSelectedWithObsolete"] is not None:
                    l = [self.project.getRelativePath(lang.fileName()) \
                         for lang in langs]
                    self.hooks["generateSelectedWithObsolete"](l)
                    return

        # generate a minimal temporary projectfile suitable for pylupdate
        if self.project.pdata["PROGLANGUAGE"][0] in ["Python", "Python2", "Python3"]:
            ok = self.__writeTempProjectFile(langs, [".py"])
        else:
            ok = False
        if not ok:
            return

        self.pylupdateProc = QProcess()
        args = []

        if self.project.getProjectType() in ["Qt4", "Qt4C", "E4Plugin"]:
            self.pylupdate = 'pylupdate4'
            if Utilities.isWindowsPlatform():
                self.pylupdate = self.pylupdate + '.exe'
        elif self.project.getProjectType() in ["PySide", "PySideC"]:
            self.pylupdate = Utilities.generatePySideToolPath('pyside-lupdate')
        else:
            return

        if noobsolete:
            args.append('-noobsolete')

        args.append('-verbose')
        args.append(self.tmpProject)
        self.pylupdateProc.setWorkingDirectory(self.project.ppath)
        self.pylupdateProc.finished.connect(self.__generateTSFileDone)
        self.pylupdateProc.readyReadStandardOutput.connect(self.__readStdoutLupdate)
        self.pylupdateProc.readyReadStandardError.connect(self.__readStderrLupdate)

        self.pylupdateProc.start(self.pylupdate, args)
        procStarted = self.pylupdateProc.waitForStarted()
        if procStarted:
            self.pylupdateProcRunning = True
        else:
            E5MessageBox.critical(self,
                self.trUtf8('Process Generation Error'),
                self.trUtf8(
                    'Could not start {0}.<br>'
                    'Ensure that it is in the search path.'
                ).format(self.pylupdate))

    def __generateAll(self):
        """
        Private method to generate all translation files (.ts) for Qt Linguist.

        All obsolete strings are removed from the .ts file.
        """
        self.__generateTSFile(noobsolete=True, generateAll=True)

    def __generateObsoleteAll(self):
        """
        Private method to generate all translation files (.ts) for Qt Linguist.

        Obsolete strings are kept.
        """
        self.__generateTSFile(noobsolete=False, generateAll=True)

    def __generateSelected(self):
        """
        Private method to generate selected translation files (.ts) for Qt Linguist.

        All obsolete strings are removed from the .ts file.
        """
        self.__generateTSFile(noobsolete=True, generateAll=False)

    def __generateObsoleteSelected(self):
        """
        Private method to generate selected translation files (.ts) for Qt Linguist.

        Obsolete strings are kept.
        """
        self.__generateTSFile(noobsolete=False, generateAll=False)

    ############################################################################
    ##  Methods for the release commands
    ############################################################################

    def __releaseTSFileDone(self, exitCode, exitStatus):
        """
        Private slot to handle the finished signal of the lrelease process.
        """
        self.lreleaseProcRunning = False
        if exitStatus == QProcess.NormalExit and exitCode == 0:
            ui = e5App().getObject("UserInterface")
            if ui.notificationsEnabled():
                ui.showNotification(UI.PixmapCache.getPixmap("linguist48.png"),
                    self.trUtf8("Translation file release"),
                    self.trUtf8("The release of the translation files (*.qm)"
                        " was successful."))
            else:
                E5MessageBox.information(self,
                    self.trUtf8("Translation file release"),
                    self.trUtf8("The release of the translation files (*.qm)"
                        " was successful."))
            if self.project.pdata["TRANSLATIONSBINPATH"]:
                target = os.path.join(self.project.ppath,
                                      self.project.pdata["TRANSLATIONSBINPATH"][0])
                for langFile in self.project.pdata["TRANSLATIONS"][:]:
                    if langFile.endswith('.ts'):
                        qmFile = os.path.join(self.project.ppath,
                                              langFile.replace('.ts', '.qm'))
                        if os.path.exists(qmFile):
                            shutil.move(qmFile, target)
        else:
            E5MessageBox.critical(self,
                self.trUtf8("Translation file release"),
                self.trUtf8("The release of the translation files (*.qm) has failed."))
        self.lreleaseProc = None
        try:
            os.remove(self.tmpProject)
        except EnvironmentError:
            pass
        self.tmpProject = None
        self.project.checkLanguageFiles()

    def __releaseTSFile(self, generateAll=False):
        """
        Private method to run lrelease to release the translation files (.qm).

        @param generateAll flag indicating whether all translations should be
            released (boolean)
        """
        if generateAll:
            langs = []
        else:
            langs = self.getSelectedItems()

        # Hooks support
        if generateAll:
            if self.hooks["releaseAll"] is not None:
                self.hooks["releaseAll"](self.project.pdata["TRANSLATIONS"])
                return
        else:
            if self.hooks["releaseSelected"] is not None:
                l = [self.project.getRelativePath(lang.fileName()) \
                     for lang in langs]
                self.hooks["releaseSelected"](l)
                return

        # generate a minimal temporary projectfile suitable for lrelease
        if self.project.pdata["PROGLANGUAGE"][0] in ["Python", "Python2", "Python3"]:
            ok = self.__writeTempProjectFile(langs, [".py"])
        else:
            ok = False
        if not ok:
            return

        self.lreleaseProc = QProcess()
        args = []

        if self.project.getProjectType() in \
                ["Qt4", "Qt4C", "E4Plugin", "PySide", "PySideC"]:
            lrelease = Utilities.generateQtToolName("lrelease")
        else:
            return
        if Utilities.isWindowsPlatform():
            lrelease = lrelease + '.exe'

        args.append('-verbose')
        args.append(self.tmpProject)
        self.lreleaseProc.setWorkingDirectory(self.project.ppath)
        self.lreleaseProc.finished.connect(self.__releaseTSFileDone)
        self.lreleaseProc.readyReadStandardOutput.connect(self.__readStdoutLrelease)
        self.lreleaseProc.readyReadStandardError.connect(self.__readStderrLrelease)

        self.lreleaseProc.start(lrelease, args)
        procStarted = self.lreleaseProc.waitForStarted()
        if procStarted:
            self.lreleaseProcRunning = True
        else:
            E5MessageBox.critical(self,
                self.trUtf8('Process Generation Error'),
                self.trUtf8(
                    '<p>Could not start lrelease.<br>'
                    'Ensure that it is available as <b>{0}</b>.</p>'
                ).format(lrelease))

    def __releaseSelected(self):
        """
        Private method to release the translation files (.qm).
        """
        self.__releaseTSFile(generateAll=False)

    def __releaseAll(self):
        """
        Private method to release the translation files (.qm).
        """
        self.__releaseTSFile(generateAll=True)

    ############################################################################
    ## Support for hooks below
    ############################################################################

    def _initHookMethods(self):
        """
        Protected method to initialize the hooks dictionary.

        Supported hook methods are:
        <ul>
        <li>extractMessages: takes no parameters</li>
        <li>generateAll: takes list of filenames as parameter</li>
        <li>generateAllWithObsolete: takes list of filenames as parameter</li>
        <li>generateSelected: takes list of filenames as parameter</li>
        <li>generateSelectedWithObsolete: takes list of filenames as parameter</li>
        <li>releaseAll: takes list of filenames as parameter</li>
        <li>releaseSelected: takes list of filenames as parameter</li>
        </ul>

        <b>Note</b>: Filenames are relative to the project directory.
        """
        self.hooks = {
            "extractMessages": None,
            "generateAll": None,
            "generateAllWithObsolete": None,
            "generateSelected": None,
            "generateSelectedWithObsolete": None,
            "releaseAll": None,
            "releaseSelected": None,
        }