eric6/Plugins/VcsPlugins/vcsMercurial/HgLogBrowserDialog.py

changeset 6942
2602857055c5
parent 6645
ad476851d7e0
child 6986
23886c1dd3d0
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/eric6/Plugins/VcsPlugins/vcsMercurial/HgLogBrowserDialog.py	Sun Apr 14 15:09:21 2019 +0200
@@ -0,0 +1,2768 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2010 - 2019 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing a dialog to browse the log history.
+"""
+
+from __future__ import unicode_literals
+try:
+    str = unicode
+except NameError:
+    pass
+
+import os
+import re
+import collections
+
+from PyQt5.QtCore import pyqtSlot, Qt, QDate, QProcess, QTimer, QRegExp, \
+    QSize, QPoint, QFileInfo
+from PyQt5.QtGui import QCursor, QColor, QPixmap, QPainter, QPen, QBrush, \
+    QIcon, QTextCursor
+from PyQt5.QtWidgets import QWidget, QDialogButtonBox, QHeaderView, \
+    QTreeWidgetItem, QApplication, QLineEdit, QMenu, QInputDialog, QToolTip
+
+from E5Gui.E5Application import e5App
+from E5Gui import E5MessageBox, E5FileDialog
+
+from .Ui_HgLogBrowserDialog import Ui_HgLogBrowserDialog
+
+from .HgDiffHighlighter import HgDiffHighlighter
+from .HgDiffGenerator import HgDiffGenerator
+
+import UI.PixmapCache
+import Preferences
+import Utilities
+from Globals import qVersionTuple, strToQByteArray
+
+COLORNAMES = ["blue", "darkgreen", "red", "green", "darkblue", "purple",
+              "cyan", "olive", "magenta", "darkred", "darkmagenta",
+              "darkcyan", "gray", "yellow"]
+COLORS = [str(QColor(x).name()) for x in COLORNAMES]
+
+
+class HgLogBrowserDialog(QWidget, Ui_HgLogBrowserDialog):
+    """
+    Class implementing a dialog to browse the log history.
+    """
+    IconColumn = 0
+    BranchColumn = 1
+    RevisionColumn = 2
+    PhaseColumn = 3
+    AuthorColumn = 4
+    DateColumn = 5
+    MessageColumn = 6
+    TagsColumn = 7
+    BookmarksColumn = 8
+    
+    LargefilesCacheL = ".hglf/"
+    LargefilesCacheW = ".hglf\\"
+    PathSeparatorRe = re.compile(r"/|\\")
+    
+    ClosedIndicator = " \u2612"
+    
+    def __init__(self, vcs, mode="log", parent=None):
+        """
+        Constructor
+        
+        @param vcs reference to the vcs object
+        @param mode mode of the dialog (string; one of log, incoming, outgoing)
+        @param parent parent widget (QWidget)
+        """
+        super(HgLogBrowserDialog, self).__init__(parent)
+        self.setupUi(self)
+        
+        windowFlags = self.windowFlags()
+        windowFlags |= Qt.WindowContextHelpButtonHint
+        self.setWindowFlags(windowFlags)
+        
+        self.mainSplitter.setSizes([300, 400])
+        self.mainSplitter.setStretchFactor(0, 1)
+        self.mainSplitter.setStretchFactor(1, 2)
+        self.diffSplitter.setStretchFactor(0, 1)
+        self.diffSplitter.setStretchFactor(1, 2)
+        
+        if mode == "log":
+            self.setWindowTitle(self.tr("Mercurial Log"))
+        elif mode == "incoming":
+            self.setWindowTitle(self.tr("Mercurial Log (Incoming)"))
+        elif mode == "outgoing":
+            self.setWindowTitle(self.tr("Mercurial Log (Outgoing)"))
+        
+        self.buttonBox.button(QDialogButtonBox.Close).setEnabled(False)
+        self.buttonBox.button(QDialogButtonBox.Cancel).setDefault(True)
+        
+        self.filesTree.headerItem().setText(self.filesTree.columnCount(), "")
+        self.filesTree.header().setSortIndicator(0, Qt.AscendingOrder)
+        
+        self.upButton.setIcon(UI.PixmapCache.getIcon("1uparrow.png"))
+        self.downButton.setIcon(UI.PixmapCache.getIcon("1downarrow.png"))
+        
+        self.refreshButton = self.buttonBox.addButton(
+            self.tr("&Refresh"), QDialogButtonBox.ActionRole)
+        self.refreshButton.setToolTip(
+            self.tr("Press to refresh the list of changesets"))
+        self.refreshButton.setEnabled(False)
+        
+        self.findPrevButton.setIcon(UI.PixmapCache.getIcon("1leftarrow.png"))
+        self.findNextButton.setIcon(UI.PixmapCache.getIcon("1rightarrow.png"))
+        self.__findBackwards = False
+        
+        self.modeComboBox.addItem(self.tr("Find"), "find")
+        self.modeComboBox.addItem(self.tr("Filter"), "filter")
+        
+        self.fieldCombo.addItem(self.tr("Revision"), "revision")
+        self.fieldCombo.addItem(self.tr("Author"), "author")
+        self.fieldCombo.addItem(self.tr("Message"), "message")
+        self.fieldCombo.addItem(self.tr("File"), "file")
+        
+        font = Preferences.getEditorOtherFonts("MonospacedFont")
+        self.diffEdit.setFontFamily(font.family())
+        self.diffEdit.setFontPointSize(font.pointSize())
+        
+        self.diffHighlighter = HgDiffHighlighter(self.diffEdit.document())
+        self.__diffGenerator = HgDiffGenerator(vcs, self)
+        self.__diffGenerator.finished.connect(self.__generatorFinished)
+        
+        self.vcs = vcs
+        if mode in ("log", "incoming", "outgoing"):
+            self.commandMode = mode
+            self.initialCommandMode = mode
+        else:
+            self.commandMode = "log"
+            self.initialCommandMode = "log"
+        self.__hgClient = vcs.getClient()
+        
+        self.__detailsTemplate = self.tr(
+            "<table>"
+            "<tr><td><b>Revision</b></td><td>{0}</td></tr>"
+            "<tr><td><b>Date</b></td><td>{1}</td></tr>"
+            "<tr><td><b>Author</b></td><td>{2}</td></tr>"
+            "<tr><td><b>Branch</b></td><td>{3}</td></tr>"
+            "{4}"
+            "<tr><td><b>Message</b></td><td>{5}</td></tr>"
+            "</table>"
+        )
+        self.__parentsTemplate = self.tr(
+            "<tr><td><b>Parents</b></td><td>{0}</td></tr>"
+        )
+        self.__childrenTemplate = self.tr(
+            "<tr><td><b>Children</b></td><td>{0}</td></tr>"
+        )
+        self.__tagsTemplate = self.tr(
+            "<tr><td><b>Tags</b></td><td>{0}</td></tr>"
+        )
+        self.__latestTagTemplate = self.tr(
+            "<tr><td><b>Latest Tag</b></td><td>{0}</td></tr>"
+        )
+        self.__bookmarksTemplate = self.tr(
+            "<tr><td><b>Bookmarks</b></td><td>{0}</td></tr>"
+        )
+        
+        self.__bundle = ""
+        self.__filename = ""
+        self.__isFile = False
+        self.__selectedRevisions = []
+        self.intercept = False
+        
+        self.__initData()
+        
+        self.__allBranchesFilter = self.tr("All")
+        
+        self.fromDate.setDisplayFormat("yyyy-MM-dd")
+        self.toDate.setDisplayFormat("yyyy-MM-dd")
+        self.__resetUI()
+        
+        # roles used in the log tree
+        self.__messageRole = Qt.UserRole
+        self.__changesRole = Qt.UserRole + 1
+        self.__edgesRole = Qt.UserRole + 2
+        self.__parentsRole = Qt.UserRole + 3
+        self.__latestTagRole = Qt.UserRole + 4
+        
+        # roles used in the file tree
+        self.__diffFileLineRole = Qt.UserRole
+        
+        if self.__hgClient:
+            self.process = None
+        else:
+            self.process = QProcess()
+            self.process.finished.connect(self.__procFinished)
+            self.process.readyReadStandardOutput.connect(self.__readStdout)
+            self.process.readyReadStandardError.connect(self.__readStderr)
+        
+        self.flags = {
+            'A': self.tr('Added'),
+            'D': self.tr('Deleted'),
+            'M': self.tr('Modified'),
+        }
+        
+        self.phases = {
+            'draft': self.tr("Draft"),
+            'public': self.tr("Public"),
+            'secret': self.tr("Secret"),
+        }
+        
+        self.__dotRadius = 8
+        self.__rowHeight = 20
+        
+        self.logTree.setIconSize(
+            QSize(100 * self.__rowHeight, self.__rowHeight))
+        self.BookmarksColumn = self.logTree.columnCount()
+        self.logTree.headerItem().setText(
+            self.BookmarksColumn, self.tr("Bookmarks"))
+        
+        self.__logTreeNormalFont = self.logTree.font()
+        self.__logTreeNormalFont.setBold(False)
+        self.__logTreeBoldFont = self.logTree.font()
+        self.__logTreeBoldFont.setBold(True)
+        
+        self.detailsEdit.anchorClicked.connect(self.__revisionClicked)
+        
+        self.__initActionsMenu()
+        
+        self.__finishCallbacks = []
+    
+    def __addFinishCallback(self, callback):
+        """
+        Private method to add a method to be called once the process finished.
+        
+        The callback methods are invoke in a FIFO style and are consumed. If
+        a callback method needs to be called again, it must be added again.
+        
+        @param callback callback method
+        @type function
+        """
+        if callback not in self.__finishCallbacks:
+            self.__finishCallbacks.append(callback)
+    
+    def __initActionsMenu(self):
+        """
+        Private method to initialize the actions menu.
+        """
+        self.__actionsMenu = QMenu()
+        self.__actionsMenu.setTearOffEnabled(True)
+        if qVersionTuple() >= (5, 1, 0):
+            self.__actionsMenu.setToolTipsVisible(True)
+        else:
+            self.__actionsMenu.hovered.connect(self.__actionsMenuHovered)
+        
+        self.__graftAct = self.__actionsMenu.addAction(
+            UI.PixmapCache.getIcon("vcsGraft.png"),
+            self.tr("Copy Changesets"), self.__graftActTriggered)
+        self.__graftAct.setToolTip(self.tr(
+            "Copy the selected changesets to the current branch"))
+        
+        self.__mergeAct = self.__actionsMenu.addAction(
+            UI.PixmapCache.getIcon("vcsMerge.png"),
+            self.tr("Merge with Changeset"), self.__mergeActTriggered)
+        self.__mergeAct.setToolTip(self.tr(
+            "Merge the working directory with the selected changeset"))
+        
+        self.__phaseAct = self.__actionsMenu.addAction(
+            self.tr("Change Phase"), self.__phaseActTriggered)
+        self.__phaseAct.setToolTip(self.tr(
+            "Change the phase of the selected revisions"))
+        self.__phaseAct.setWhatsThis(self.tr(
+            """<b>Change Phase</b>\n<p>This changes the phase of the"""
+            """ selected revisions. The selected revisions have to have"""
+            """ the same current phase.</p>"""))
+        
+        self.__tagAct = self.__actionsMenu.addAction(
+            UI.PixmapCache.getIcon("vcsTag.png"), self.tr("Tag"),
+            self.__tagActTriggered)
+        self.__tagAct.setToolTip(self.tr("Tag the selected revision"))
+        
+        self.__switchAct = self.__actionsMenu.addAction(
+            UI.PixmapCache.getIcon("vcsSwitch.png"), self.tr("Switch"),
+            self.__switchActTriggered)
+        self.__switchAct.setToolTip(self.tr(
+            "Switch the working directory to the selected revision"))
+        
+        self.__actionsMenu.addSeparator()
+        
+        self.__bookmarkAct = self.__actionsMenu.addAction(
+            UI.PixmapCache.getIcon("addBookmark.png"),
+            self.tr("Define Bookmark..."), self.__bookmarkActTriggered)
+        self.__bookmarkAct.setToolTip(
+            self.tr("Bookmark the selected revision"))
+        self.__bookmarkMoveAct = self.__actionsMenu.addAction(
+            UI.PixmapCache.getIcon("moveBookmark.png"),
+            self.tr("Move Bookmark..."), self.__bookmarkMoveActTriggered)
+        self.__bookmarkMoveAct.setToolTip(
+            self.tr("Move bookmark to the selected revision"))
+        
+        self.__actionsMenu.addSeparator()
+        
+        self.__pullAct = self.__actionsMenu.addAction(
+            UI.PixmapCache.getIcon("vcsUpdate.png"), self.tr("Pull Changes"),
+            self.__pullActTriggered)
+        self.__pullAct.setToolTip(self.tr(
+            "Pull changes from a remote repository"))
+        self.__lfPullAct = self.__actionsMenu.addAction(
+            self.tr("Pull Large Files"), self.__lfPullActTriggered)
+        self.__lfPullAct.setToolTip(self.tr(
+            "Pull large files for selected revisions"))
+        self.__fetchAct = self.__actionsMenu.addAction(
+            self.tr("Fetch Changes"), self.__fetchActTriggered)
+        self.__fetchAct.setToolTip(self.tr(
+            "Fetch changes from a remote repository"))
+        
+        self.__actionsMenu.addSeparator()
+        
+        self.__pushAct = self.__actionsMenu.addAction(
+            UI.PixmapCache.getIcon("vcsCommit.png"),
+            self.tr("Push Selected Changes"), self.__pushActTriggered)
+        self.__pushAct.setToolTip(self.tr(
+            "Push changes of the selected changeset and its ancestors"
+            " to a remote repository"))
+        self.__pushAllAct = self.__actionsMenu.addAction(
+            UI.PixmapCache.getIcon("vcsCommit.png"),
+            self.tr("Push All Changes"), self.__pushAllActTriggered)
+        self.__pushAllAct.setToolTip(self.tr(
+            "Push all changes to a remote repository"))
+        
+        self.__actionsMenu.addSeparator()
+        
+        self.__bundleAct = self.__actionsMenu.addAction(
+            UI.PixmapCache.getIcon("vcsCreateChangegroup.png"),
+            self.tr("Create Changegroup"), self.__bundleActTriggered)
+        self.__bundleAct.setToolTip(self.tr(
+            "Create a changegroup file containing the selected changesets"))
+        self.__bundleAct.setWhatsThis(self.tr(
+            """<b>Create Changegroup</b>\n<p>This creates a changegroup"""
+            """ file containing the selected revisions. If no revisions"""
+            """ are selected, all changesets will be bundled. If one"""
+            """ revision is selected, it will be interpreted as the base"""
+            """ revision. Otherwise the lowest revision will be used as"""
+            """ the base revision and all other revision will be bundled."""
+            """ If the dialog is showing outgoing changesets, all"""
+            """ selected changesets will be bundled.</p>"""))
+        self.__unbundleAct = self.__actionsMenu.addAction(
+            UI.PixmapCache.getIcon("vcsApplyChangegroup.png"),
+            self.tr("Apply Changegroup"), self.__unbundleActTriggered)
+        self.__unbundleAct.setToolTip(self.tr(
+            "Apply the currently viewed changegroup file"))
+        
+        self.__actionsMenu.addSeparator()
+        
+        self.__gpgSignAct = self.__actionsMenu.addAction(
+            UI.PixmapCache.getIcon("changesetSign.png"),
+            self.tr("Sign Revisions"), self.__gpgSignActTriggered)
+        self.__gpgSignAct.setToolTip(self.tr(
+            "Add a signature for the selected revisions"))
+        self.__gpgVerifyAct = self.__actionsMenu.addAction(
+            UI.PixmapCache.getIcon("changesetSignVerify.png"),
+            self.tr("Verify Signatures"), self.__gpgVerifyActTriggered)
+        self.__gpgVerifyAct.setToolTip(self.tr(
+            "Verify all signatures there may be for the selected revision"))
+        
+        self.__actionsMenu.addSeparator()
+        
+        self.__stripAct = self.__actionsMenu.addAction(
+            UI.PixmapCache.getIcon("fileDelete.png"),
+            self.tr("Strip Changesets"), self.__stripActTriggered)
+        self.__stripAct.setToolTip(self.tr(
+            "Strip changesets from a repository"))
+        
+        self.__actionsMenu.addSeparator()
+        
+        self.__selectAllAct = self.__actionsMenu.addAction(
+            self.tr("Select All Entries"), self.__selectAllActTriggered)
+        self.__unselectAllAct = self.__actionsMenu.addAction(
+            self.tr("Deselect All Entries"),
+            lambda: self.__selectAllActTriggered(False))
+        
+        self.actionsButton.setIcon(
+            UI.PixmapCache.getIcon("actionsToolButton.png"))
+        self.actionsButton.setMenu(self.__actionsMenu)
+    
+    def __actionsMenuHovered(self, action):
+        """
+        Private slot to show the tooltip for an action menu entry.
+        
+        @param action action to show tooltip for
+        @type QAction
+        """
+        QToolTip.showText(
+            QCursor.pos(), action.toolTip(),
+            self.__actionsMenu, self.__actionsMenu.actionGeometry(action))
+    
+    def __initData(self):
+        """
+        Private method to (re-)initialize some data.
+        """
+        self.__maxDate = QDate()
+        self.__minDate = QDate()
+        self.__filterLogsEnabled = True
+        
+        self.buf = []        # buffer for stdout
+        self.diff = None
+        self.__started = False
+        self.__lastRev = 0
+        self.projectMode = False
+        
+        # attributes to store log graph data
+        self.__revs = []
+        self.__revColors = {}
+        self.__revColor = 0
+        
+        self.__branchColors = {}
+        
+        self.__projectRevision = -1
+        self.__projectBranch = ""
+        
+        self.__childrenInfo = collections.defaultdict(list)
+    
+    def closeEvent(self, e):
+        """
+        Protected slot implementing a close event handler.
+        
+        @param e close event (QCloseEvent)
+        """
+        if self.__hgClient:
+            if self.__hgClient.isExecuting():
+                self.__hgClient.cancel()
+        else:
+            if self.process is not None and \
+               self.process.state() != QProcess.NotRunning:
+                self.process.terminate()
+                QTimer.singleShot(2000, self.process.kill)
+                self.process.waitForFinished(3000)
+        
+        self.vcs.getPlugin().setPreferences(
+            "LogBrowserGeometry", self.saveGeometry())
+        self.vcs.getPlugin().setPreferences(
+            "LogBrowserSplitterStates", [
+                self.mainSplitter.saveState(),
+                self.detailsSplitter.saveState(),
+                self.diffSplitter.saveState(),
+            ]
+        )
+        
+        e.accept()
+    
+    def show(self):
+        """
+        Public slot to show the dialog.
+        """
+        self.__reloadGeometry()
+        self.__restoreSplitterStates()
+        self.__resetUI()
+        
+        super(HgLogBrowserDialog, self).show()
+
+    def __reloadGeometry(self):
+        """
+        Private method to restore the geometry.
+        """
+        geom = self.vcs.getPlugin().getPreferences("LogBrowserGeometry")
+        if geom.isEmpty():
+            s = QSize(1000, 800)
+            self.resize(s)
+        else:
+            self.restoreGeometry(geom)
+    
+    def __restoreSplitterStates(self):
+        """
+        Private method to restore the state of the various splitters.
+        """
+        states = self.vcs.getPlugin().getPreferences(
+            "LogBrowserSplitterStates")
+        if len(states) == 3:
+            # we have three splitters
+            self.mainSplitter.restoreState(states[0])
+            self.detailsSplitter.restoreState(states[1])
+            self.diffSplitter.restoreState(states[2])
+    
+    def __resetUI(self):
+        """
+        Private method to reset the user interface.
+        """
+        self.branchCombo.clear()
+        self.fromDate.setDate(QDate.currentDate())
+        self.toDate.setDate(QDate.currentDate())
+        self.fieldCombo.setCurrentIndex(self.fieldCombo.findData("message"))
+        self.limitSpinBox.setValue(self.vcs.getPlugin().getPreferences(
+            "LogLimit"))
+        self.stopCheckBox.setChecked(self.vcs.getPlugin().getPreferences(
+            "StopLogOnCopy"))
+        
+        if self.initialCommandMode in ("incoming", "outgoing"):
+            self.nextButton.setEnabled(False)
+            self.limitSpinBox.setEnabled(False)
+        else:
+            self.nextButton.setEnabled(True)
+            self.limitSpinBox.setEnabled(True)
+        
+        self.logTree.clear()
+        
+        self.commandMode = self.initialCommandMode
+    
+    def __resizeColumnsLog(self):
+        """
+        Private method to resize the log tree columns.
+        """
+        self.logTree.header().resizeSections(QHeaderView.ResizeToContents)
+        self.logTree.header().setStretchLastSection(True)
+    
+    def __resizeColumnsFiles(self):
+        """
+        Private method to resize the changed files tree columns.
+        """
+        self.filesTree.header().resizeSections(QHeaderView.ResizeToContents)
+        self.filesTree.header().setStretchLastSection(True)
+    
+    def __resortFiles(self):
+        """
+        Private method to resort the changed files tree.
+        """
+        sortColumn = self.filesTree.sortColumn()
+        self.filesTree.sortItems(
+            1, self.filesTree.header().sortIndicatorOrder())
+        self.filesTree.sortItems(
+            sortColumn, self.filesTree.header().sortIndicatorOrder())
+    
+    def __getColor(self, n):
+        """
+        Private method to get the (rotating) name of the color given an index.
+        
+        @param n color index (integer)
+        @return color name (string)
+        """
+        return COLORS[n % len(COLORS)]
+    
+    def __branchColor(self, branchName):
+        """
+        Private method to calculate a color for a given branch name.
+        
+        @param branchName name of the branch (string)
+        @return name of the color to use (string)
+        """
+        if branchName not in self.__branchColors:
+            self.__branchColors[branchName] = self.__getColor(
+                len(self.__branchColors))
+        return self.__branchColors[branchName]
+    
+    def __generateEdges(self, rev, parents):
+        """
+        Private method to generate edge info for the give data.
+        
+        @param rev revision to calculate edge info for (integer)
+        @param parents list of parent revisions (list of integers)
+        @return tuple containing the column and color index for
+            the given node and a list of tuples indicating the edges
+            between the given node and its parents
+            (integer, integer, [(integer, integer, integer), ...])
+        """
+        if rev not in self.__revs:
+            # new head
+            self.__revs.append(rev)
+            self.__revColors[rev] = self.__revColor
+            self.__revColor += 1
+        
+        col = self.__revs.index(rev)
+        color = self.__revColors.pop(rev)
+        nextRevs = self.__revs[:]
+        
+        # add parents to next
+        addparents = [p for p in parents if p not in nextRevs]
+        nextRevs[col:col + 1] = addparents
+        
+        # set colors for the parents
+        for i, p in enumerate(addparents):
+            if not i:
+                self.__revColors[p] = color
+            else:
+                self.__revColors[p] = self.__revColor
+                self.__revColor += 1
+        
+        # add edges to the graph
+        edges = []
+        if parents[0] != -1:
+            for ecol, erev in enumerate(self.__revs):
+                if erev in nextRevs:
+                    edges.append(
+                        (ecol, nextRevs.index(erev), self.__revColors[erev]))
+                elif erev == rev:
+                    for p in parents:
+                        edges.append(
+                            (ecol, nextRevs.index(p), self.__revColors[p]))
+        
+        self.__revs = nextRevs
+        return col, color, edges
+    
+    def __generateIcon(self, column, color, bottomedges, topedges, dotColor,
+                       currentRev, closed):
+        """
+        Private method to generate an icon containing the revision tree for the
+        given data.
+        
+        @param column column index of the revision (integer)
+        @param color color of the node (integer)
+        @param bottomedges list of edges for the bottom of the node
+            (list of tuples of three integers)
+        @param topedges list of edges for the top of the node
+            (list of tuples of three integers)
+        @param dotColor color to be used for the dot (QColor)
+        @param currentRev flag indicating to draw the icon for the
+            current revision (boolean)
+        @param closed flag indicating to draw an icon for a closed
+            branch (boolean)
+        @return icon for the node (QIcon)
+        """
+        def col2x(col, radius):
+            """
+            Local function to calculate a x-position for a column.
+            
+            @param col column number (integer)
+            @param radius radius of the indicator circle (integer)
+            """
+            return int(1.2 * radius) * col + radius // 2 + 3
+        
+        radius = self.__dotRadius
+        w = len(bottomedges) * radius + 20
+        h = self.__rowHeight
+        
+        dot_x = col2x(column, radius) - radius // 2
+        dot_y = h // 2
+        
+        pix = QPixmap(w, h)
+        pix.fill(QColor(0, 0, 0, 0))
+        painter = QPainter(pix)
+        painter.setRenderHint(QPainter.Antialiasing)
+        
+        pen = QPen(Qt.blue)
+        pen.setWidth(2)
+        painter.setPen(pen)
+        
+        lpen = QPen(pen)
+        lpen.setColor(Qt.black)
+        painter.setPen(lpen)
+        
+        # draw the revision history lines
+        for y1, y2, lines in ((0, h, bottomedges),
+                              (-h, 0, topedges)):
+            if lines:
+                for start, end, ecolor in lines:
+                    lpen = QPen(pen)
+                    lpen.setColor(QColor(self.__getColor(ecolor)))
+                    lpen.setWidth(2)
+                    painter.setPen(lpen)
+                    x1 = col2x(start, radius)
+                    x2 = col2x(end, radius)
+                    painter.drawLine(x1, dot_y + y1, x2, dot_y + y2)
+        
+        penradius = 1
+        pencolor = Qt.black
+        
+        dot_y = (h // 2) - radius // 2
+        
+        # draw a dot for the revision
+        if currentRev:
+            # enlarge dot for the current revision
+            delta = 1
+            radius += 2 * delta
+            dot_y -= delta
+            dot_x -= delta
+            penradius = 3
+        painter.setBrush(dotColor)
+        pen = QPen(pencolor)
+        pen.setWidth(penradius)
+        painter.setPen(pen)
+        if closed:
+            painter.drawRect(dot_x - 2, dot_y + 1,
+                             radius + 4, radius - 2)
+        elif self.commandMode in ("incoming", "outgoing"):
+            offset = radius // 2
+            painter.drawConvexPolygon(
+                QPoint(dot_x + offset, dot_y),
+                QPoint(dot_x, dot_y + offset),
+                QPoint(dot_x + offset, dot_y + 2 * offset),
+                QPoint(dot_x + 2 * offset, dot_y + offset)
+            )
+        else:
+            painter.drawEllipse(dot_x, dot_y, radius, radius)
+        painter.end()
+        return QIcon(pix)
+    
+    def __getParents(self, rev):
+        """
+        Private method to get the parents of the currently viewed
+        file/directory.
+        
+        @param rev revision number to get parents for (string)
+        @return list of parent revisions (list of integers)
+        """
+        errMsg = ""
+        parents = [-1]
+        
+        if int(rev) > 0:
+            args = self.vcs.initCommand("parents")
+            if self.commandMode == "incoming":
+                if self.__bundle:
+                    args.append("--repository")
+                    args.append(self.__bundle)
+                elif self.vcs.bundleFile and \
+                        os.path.exists(self.vcs.bundleFile):
+                    args.append("--repository")
+                    args.append(self.vcs.bundleFile)
+            args.append("--template")
+            args.append("{rev}\n")
+            args.append("-r")
+            args.append(rev)
+            if not self.projectMode:
+                args.append(self.__filename)
+            
+            output = ""
+            if self.__hgClient:
+                output, errMsg = self.__hgClient.runcommand(args)
+            else:
+                process = QProcess()
+                process.setWorkingDirectory(self.repodir)
+                process.start('hg', args)
+                procStarted = process.waitForStarted(5000)
+                if procStarted:
+                    finished = process.waitForFinished(30000)
+                    if finished and process.exitCode() == 0:
+                        output = str(process.readAllStandardOutput(),
+                                     self.vcs.getEncoding(), 'replace')
+                    else:
+                        if not finished:
+                            errMsg = self.tr(
+                                "The hg process did not finish within 30s.")
+                else:
+                    errMsg = self.tr("Could not start the hg executable.")
+                
+                if errMsg:
+                    E5MessageBox.critical(
+                        self,
+                        self.tr("Mercurial Error"),
+                        errMsg)
+            
+            if output:
+                parents = [int(p) for p in output.strip().splitlines()]
+        
+        return parents
+    
+    def __identifyProject(self):
+        """
+        Private method to determine the revision of the project directory.
+        """
+        errMsg = ""
+        
+        args = self.vcs.initCommand("identify")
+        args.append("-nb")
+        
+        output = ""
+        if self.__hgClient:
+            output, errMsg = self.__hgClient.runcommand(args)
+        else:
+            process = QProcess()
+            process.setWorkingDirectory(self.repodir)
+            process.start('hg', args)
+            procStarted = process.waitForStarted(5000)
+            if procStarted:
+                finished = process.waitForFinished(30000)
+                if finished and process.exitCode() == 0:
+                    output = str(process.readAllStandardOutput(),
+                                 self.vcs.getEncoding(), 'replace')
+                else:
+                    if not finished:
+                        errMsg = self.tr(
+                            "The hg process did not finish within 30s.")
+            else:
+                errMsg = self.tr("Could not start the hg executable.")
+        
+        if errMsg:
+            E5MessageBox.critical(
+                self,
+                self.tr("Mercurial Error"),
+                errMsg)
+        
+        if output:
+            outputList = output.strip().split(None, 1)
+            if len(outputList) == 2:
+                self.__projectRevision = outputList[0].strip()
+                if self.__projectRevision.endswith("+"):
+                    self.__projectRevision = self.__projectRevision[:-1]
+                self.__projectBranch = outputList[1].strip()
+    
+    def __getClosedBranches(self):
+        """
+        Private method to get the list of closed branches.
+        """
+        self.__closedBranchesRevs = []
+        errMsg = ""
+        
+        args = self.vcs.initCommand("branches")
+        args.append("--closed")
+        
+        output = ""
+        if self.__hgClient:
+            output, errMsg = self.__hgClient.runcommand(args)
+        else:
+            process = QProcess()
+            process.setWorkingDirectory(self.repodir)
+            process.start('hg', args)
+            procStarted = process.waitForStarted(5000)
+            if procStarted:
+                finished = process.waitForFinished(30000)
+                if finished and process.exitCode() == 0:
+                    output = str(process.readAllStandardOutput(),
+                                 self.vcs.getEncoding(), 'replace')
+                else:
+                    if not finished:
+                        errMsg = self.tr(
+                            "The hg process did not finish within 30s.")
+            else:
+                errMsg = self.tr("Could not start the hg executable.")
+        
+        if errMsg:
+            E5MessageBox.critical(
+                self,
+                self.tr("Mercurial Error"),
+                errMsg)
+        
+        if output:
+            for line in output.splitlines():
+                if line.strip().endswith("(closed)"):
+                    parts = line.split()
+                    self.__closedBranchesRevs.append(
+                        parts[-2].split(":", 1)[0])
+    
+    def __getRevisionOfTag(self, tag):
+        """
+        Private method to get the revision of a tag.
+        
+        @param tag tag name
+        @type str
+        @return tuple containing the revision and changeset ID
+        @rtype tuple of (str, str)
+        """
+        errMsg = ""
+        
+        args = self.vcs.initCommand("tags")
+        
+        output = ""
+        if self.__hgClient:
+            output, errMsg = self.__hgClient.runcommand(args)
+        else:
+            process = QProcess()
+            process.setWorkingDirectory(self.repodir)
+            process.start('hg', args)
+            procStarted = process.waitForStarted(5000)
+            if procStarted:
+                finished = process.waitForFinished(30000)
+                if finished and process.exitCode() == 0:
+                    output = str(process.readAllStandardOutput(),
+                                 self.vcs.getEncoding(), 'replace')
+                else:
+                    if not finished:
+                        errMsg = self.tr(
+                            "The hg process did not finish within 30s.")
+            else:
+                errMsg = self.tr("Could not start the hg executable.")
+        
+        if errMsg:
+            E5MessageBox.critical(
+                self,
+                self.tr("Mercurial Error"),
+                errMsg)
+        
+        res = ("", "")
+        if output:
+            for line in output.splitlines():
+                if line.strip():
+                    try:
+                        name, rev = line.strip().rsplit(None, 1)
+                        if name == tag:
+                            res = tuple(rev.split(":", 1))
+                            break
+                    except ValueError:
+                        # ignore silently
+                        pass
+        
+        return res
+    
+    def __generateLogItem(self, author, date, message, revision, changedPaths,
+                          parents, branches, tags, phase, bookmarks,
+                          latestTag):
+        """
+        Private method to generate a log tree entry.
+        
+        @param author author info (string)
+        @param date date info (string)
+        @param message text of the log message (list of strings)
+        @param revision revision info (string)
+        @param changedPaths list of dictionary objects containing
+            info about the changed files/directories
+        @param parents list of parent revisions (list of integers)
+        @param branches list of branches (list of strings)
+        @param tags list of tags (string)
+        @param phase phase of the entry (string)
+        @param bookmarks list of bookmarks (string)
+        @param latestTag the latest tag(s) reachable from the changeset
+            (list of strings)
+        @return reference to the generated item (QTreeWidgetItem)
+        """
+        logMessageColumnWidth = self.vcs.getPlugin().getPreferences(
+            "LogMessageColumnWidth")
+        msgtxt = ""
+        for line in message:
+            if ". " in line:
+                msgtxt += " " + line.strip().split(". ", 1)[0] + "."
+                break
+            else:
+                msgtxt += " " + line.strip()
+        if len(msgtxt) > logMessageColumnWidth:
+            msgtxt = "{0}...".format(msgtxt[:logMessageColumnWidth])
+        
+        rev, node = revision.split(":")
+        if rev in self.__closedBranchesRevs:
+            closedStr = self.ClosedIndicator
+        else:
+            closedStr = ""
+        if phase in self.phases:
+            phaseStr = self.phases[phase]
+        else:
+            phaseStr = phase
+        columnLabels = [
+            "",
+            branches[0] + closedStr,
+            "{0:>7}:{1}".format(rev, node),
+            phaseStr,
+            author,
+            date,
+            msgtxt,
+            ", ".join(tags),
+        ]
+        if bookmarks is not None:
+            columnLabels.append(", ".join(bookmarks))
+        itm = QTreeWidgetItem(self.logTree, columnLabels)
+        
+        itm.setForeground(self.BranchColumn,
+                          QBrush(QColor(self.__branchColor(branches[0]))))
+        
+        if not self.projectMode:
+            parents = self.__getParents(rev)
+        if not parents:
+            parents = [int(rev) - 1]
+        column, color, edges = self.__generateEdges(int(rev), parents)
+        
+        itm.setData(0, self.__messageRole, message)
+        itm.setData(0, self.__changesRole, changedPaths)
+        itm.setData(0, self.__edgesRole, edges)
+        itm.setData(0, self.__latestTagRole, latestTag)
+        if parents == [-1]:
+            itm.setData(0, self.__parentsRole, [])
+        else:
+            itm.setData(0, self.__parentsRole, parents)
+            for parent in parents:
+                self.__childrenInfo[parent].append(int(rev))
+        
+        if self.logTree.topLevelItemCount() > 1:
+            topedges = \
+                self.logTree.topLevelItem(
+                    self.logTree.indexOfTopLevelItem(itm) - 1)\
+                .data(0, self.__edgesRole)
+        else:
+            topedges = None
+        
+        icon = self.__generateIcon(column, color, edges, topedges,
+                                   QColor(self.__branchColor(branches[0])),
+                                   rev == self.__projectRevision,
+                                   rev in self.__closedBranchesRevs)
+        itm.setIcon(0, icon)
+        
+        try:
+            self.__lastRev = int(revision.split(":")[0])
+        except ValueError:
+            self.__lastRev = 0
+        
+        return itm
+    
+    def __getLogEntries(self, startRev=None, noEntries=0):
+        """
+        Private method to retrieve log entries from the repository.
+        
+        @param startRev revision number to start from (integer, string)
+        @keyparam noEntries number of entries to get (0 = default) (int)
+        """
+        self.buttonBox.button(QDialogButtonBox.Close).setEnabled(False)
+        self.buttonBox.button(QDialogButtonBox.Cancel).setEnabled(True)
+        self.buttonBox.button(QDialogButtonBox.Cancel).setDefault(True)
+        QApplication.processEvents()
+        
+        QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
+        QApplication.processEvents()
+        
+        self.buf = []
+        self.cancelled = False
+        self.errors.clear()
+        self.intercept = False
+        
+        if noEntries == 0:
+            noEntries = self.limitSpinBox.value()
+        
+        preargs = []
+        args = self.vcs.initCommand(self.commandMode)
+        args.append('--verbose')
+        if self.commandMode not in ("incoming", "outgoing"):
+            args.append('--limit')
+            args.append(str(noEntries))
+        if self.commandMode in ("incoming", "outgoing"):
+            args.append("--newest-first")
+            if self.vcs.hasSubrepositories():
+                args.append("--subrepos")
+        if startRev is not None:
+            args.append('--rev')
+            args.append('{0}:0'.format(startRev))
+        if not self.projectMode and \
+           not self.fname == "." and \
+           not self.stopCheckBox.isChecked():
+            args.append('--follow')
+        if self.commandMode == "log":
+            args.append('--copies')
+        args.append('--template')
+        args.append(os.path.join(os.path.dirname(__file__),
+                                 "templates",
+                                 "logBrowserBookmarkPhase.tmpl"))
+        if self.commandMode == "incoming":
+            if self.__bundle:
+                args.append(self.__bundle)
+            elif not self.vcs.hasSubrepositories():
+                project = e5App().getObject("Project")
+                self.vcs.bundleFile = os.path.join(
+                    project.getProjectManagementDir(), "hg-bundle.hg")
+                if os.path.exists(self.vcs.bundleFile):
+                    os.remove(self.vcs.bundleFile)
+                preargs = args[:]
+                preargs.append("--quiet")
+                preargs.append('--bundle')
+                preargs.append(self.vcs.bundleFile)
+                args.append(self.vcs.bundleFile)
+        if not self.projectMode:
+            args.append(self.__filename)
+        
+        if self.__hgClient:
+            self.inputGroup.setEnabled(False)
+            self.inputGroup.hide()
+            
+            if preargs:
+                out, err = self.__hgClient.runcommand(preargs)
+            else:
+                err = ""
+            if err:
+                self.__showError(err)
+            elif self.commandMode != "incoming" or \
+                (self.vcs.bundleFile and
+                 os.path.exists(self.vcs.bundleFile)) or \
+                    self.__bundle:
+                out, err = self.__hgClient.runcommand(args)
+                self.buf = out.splitlines(True)
+                if err:
+                    self.__showError(err)
+                self.__processBuffer()
+            self.__finish()
+        else:
+            self.process.kill()
+            
+            self.process.setWorkingDirectory(self.repodir)
+            
+            if preargs:
+                process = QProcess()
+                process.setWorkingDirectory(self.repodir)
+                process.start('hg', args)
+                procStarted = process.waitForStarted(5000)
+                if procStarted:
+                    process.waitForFinished(30000)
+            
+            if self.commandMode != "incoming" or \
+                (self.vcs.bundleFile and
+                 os.path.exists(self.vcs.bundleFile)) or \
+                    self.__bundle:
+                self.process.start('hg', args)
+                procStarted = self.process.waitForStarted(5000)
+                if not procStarted:
+                    self.inputGroup.setEnabled(False)
+                    self.inputGroup.hide()
+                    E5MessageBox.critical(
+                        self,
+                        self.tr('Process Generation Error'),
+                        self.tr(
+                            'The process {0} could not be started. '
+                            'Ensure, that it is in the search path.'
+                        ).format('hg'))
+            else:
+                self.__finish()
+    
+    def start(self, fn, bundle=None, isFile=False, noEntries=0):
+        """
+        Public slot to start the hg log command.
+        
+        @param fn filename to show the log for (string)
+        @keyparam bundle name of a bundle file (string)
+        @keyparam isFile flag indicating log for a file is to be shown
+            (boolean)
+        @keyparam noEntries number of entries to get (0 = default) (int)
+        """
+        self.__bundle = bundle
+        self.__isFile = isFile
+        
+        self.sbsSelectLabel.clear()
+        
+        self.errorGroup.hide()
+        QApplication.processEvents()
+        
+        self.__initData()
+        
+        self.__filename = fn
+        self.dname, self.fname = self.vcs.splitPath(fn)
+        
+        # find the root of the repo
+        self.repodir = self.dname
+        while not os.path.isdir(os.path.join(self.repodir, self.vcs.adminDir)):
+            self.repodir = os.path.dirname(self.repodir)
+            if os.path.splitdrive(self.repodir)[1] == os.sep:
+                return
+        
+        self.projectMode = (self.fname == "." and self.dname == self.repodir)
+        self.stopCheckBox.setDisabled(self.projectMode or self.fname == ".")
+        self.activateWindow()
+        self.raise_()
+        
+        self.logTree.clear()
+        self.__started = True
+        self.__identifyProject()
+        self.__getClosedBranches()
+        self.__getLogEntries(noEntries=noEntries)
+    
+    def __procFinished(self, exitCode, exitStatus):
+        """
+        Private slot connected to the finished signal.
+        
+        @param exitCode exit code of the process (integer)
+        @param exitStatus exit status of the process (QProcess.ExitStatus)
+        """
+        self.__processBuffer()
+        self.__finish()
+    
+    def __finish(self):
+        """
+        Private slot called when the process finished or the user pressed
+        the button.
+        """
+        if self.process is not None and \
+           self.process.state() != QProcess.NotRunning:
+            self.process.terminate()
+            QTimer.singleShot(2000, self.process.kill)
+            self.process.waitForFinished(3000)
+        
+        QApplication.restoreOverrideCursor()
+        
+        self.buttonBox.button(QDialogButtonBox.Close).setEnabled(True)
+        self.buttonBox.button(QDialogButtonBox.Cancel).setEnabled(False)
+        self.buttonBox.button(QDialogButtonBox.Close).setDefault(True)
+        
+        self.inputGroup.setEnabled(False)
+        self.inputGroup.hide()
+        self.refreshButton.setEnabled(True)
+        
+        while self.__finishCallbacks:
+            self.__finishCallbacks.pop(0)()
+    
+    def __modifyForLargeFiles(self, filename):
+        """
+        Private method to convert the displayed file name for a large file.
+        
+        @param filename file name to be processed (string)
+        @return processed file name (string)
+        """
+        if filename.startswith((self.LargefilesCacheL, self.LargefilesCacheW)):
+            return self.tr("{0} (large file)").format(
+                self.PathSeparatorRe.split(filename, 1)[1])
+        else:
+            return filename
+    
+    def __processBuffer(self):
+        """
+        Private method to process the buffered output of the hg log command.
+        """
+        noEntries = 0
+        log = {"message": [], "bookmarks": None, "phase": ""}
+        changedPaths = []
+        initialText = True
+        fileCopies = {}
+        for s in self.buf:
+            if s != "@@@\n":
+                try:
+                    key, value = s.split("|", 1)
+                except ValueError:
+                    key = ""
+                    value = s
+                if key == "change":
+                    initialText = False
+                    log["revision"] = value.strip()
+                elif key == "user":
+                    log["author"] = value.strip()
+                elif key == "parents":
+                    log["parents"] = \
+                        [int(x.split(":", 1)[0])
+                         for x in value.strip().split()]
+                elif key == "date":
+                    log["date"] = " ".join(value.strip().split()[:2])
+                elif key == "description":
+                    log["message"].append(value.strip())
+                elif key == "file_adds":
+                    if value.strip():
+                        for f in value.strip().split(", "):
+                            if f in fileCopies:
+                                changedPaths.append({
+                                    "action": "A",
+                                    "path": self.__modifyForLargeFiles(f),
+                                    "copyfrom": self.__modifyForLargeFiles(
+                                        fileCopies[f]),
+                                })
+                            else:
+                                changedPaths.append({
+                                    "action": "A",
+                                    "path": self.__modifyForLargeFiles(f),
+                                    "copyfrom": "",
+                                })
+                elif key == "files_mods":
+                    if value.strip():
+                        for f in value.strip().split(", "):
+                            changedPaths.append({
+                                "action": "M",
+                                "path": self.__modifyForLargeFiles(f),
+                                "copyfrom": "",
+                            })
+                elif key == "file_dels":
+                    if value.strip():
+                        for f in value.strip().split(", "):
+                            changedPaths.append({
+                                "action": "D",
+                                "path": self.__modifyForLargeFiles(f),
+                                "copyfrom": "",
+                            })
+                elif key == "file_copies":
+                    if value.strip():
+                        for entry in value.strip().split(", "):
+                            newName, oldName = entry[:-1].split(" (")
+                            fileCopies[newName] = oldName
+                elif key == "branches":
+                    if value.strip():
+                        log["branches"] = value.strip().split(", ")
+                    else:
+                        log["branches"] = ["default"]
+                elif key == "tags":
+                    log["tags"] = value.strip().split(", ")
+                elif key == "bookmarks":
+                    log["bookmarks"] = value.strip().split(", ")
+                elif key == "phase":
+                    log["phase"] = value.strip()
+                elif key == "latesttag":
+                    tag = value.strip()
+                    if tag == "null":
+                        log["latesttag"] = []
+                    elif ":" in tag:
+                        log["latesttag"] = [
+                            t.strip() for t in tag.split(":") if t.strip()]
+                    else:
+                        log["latesttag"] = [tag]
+                else:
+                    if initialText:
+                        continue
+                    if value.strip():
+                        log["message"].append(value.strip())
+            else:
+                if len(log) > 1:
+                    self.__generateLogItem(
+                        log["author"], log["date"],
+                        log["message"], log["revision"], changedPaths,
+                        log["parents"], log["branches"], log["tags"],
+                        log["phase"], log["bookmarks"], log["latesttag"])
+                    dt = QDate.fromString(log["date"], Qt.ISODate)
+                    if not self.__maxDate.isValid() and \
+                       not self.__minDate.isValid():
+                        self.__maxDate = dt
+                        self.__minDate = dt
+                    else:
+                        if self.__maxDate < dt:
+                            self.__maxDate = dt
+                        if self.__minDate > dt:
+                            self.__minDate = dt
+                    noEntries += 1
+                    log = {"message": [], "bookmarks": None, "phase": ""}
+                    changedPaths = []
+                    fileCopies = {}
+        
+        self.__resizeColumnsLog()
+        
+        if self.__started:
+            if self.__selectedRevisions:
+                foundItems = self.logTree.findItems(
+                    self.__selectedRevisions[0], Qt.MatchExactly,
+                    self.RevisionColumn)
+                if foundItems:
+                    self.logTree.setCurrentItem(foundItems[0])
+                else:
+                    self.logTree.setCurrentItem(self.logTree.topLevelItem(0))
+            else:
+                self.logTree.setCurrentItem(self.logTree.topLevelItem(0))
+            self.__started = False
+        
+        if self.commandMode in ("incoming", "outgoing"):
+            self.commandMode = "log"    # switch to log mode
+            if self.__lastRev > 0:
+                self.nextButton.setEnabled(True)
+                self.limitSpinBox.setEnabled(True)
+        else:
+            if noEntries < self.limitSpinBox.value() and not self.cancelled:
+                self.nextButton.setEnabled(False)
+                self.limitSpinBox.setEnabled(False)
+        
+        # update the log filters
+        self.__filterLogsEnabled = False
+        self.fromDate.setMinimumDate(self.__minDate)
+        self.fromDate.setMaximumDate(self.__maxDate)
+        self.fromDate.setDate(self.__minDate)
+        self.toDate.setMinimumDate(self.__minDate)
+        self.toDate.setMaximumDate(self.__maxDate)
+        self.toDate.setDate(self.__maxDate)
+        
+        branchFilter = self.branchCombo.currentText()
+        if not branchFilter:
+            branchFilter = self.__allBranchesFilter
+        self.branchCombo.clear()
+        self.branchCombo.addItems(
+            [self.__allBranchesFilter] + sorted(self.__branchColors.keys()))
+        self.branchCombo.setCurrentIndex(
+            self.branchCombo.findText(branchFilter))
+        
+        self.__filterLogsEnabled = True
+        if self.__actionMode() == "filter":
+            self.__filterLogs()
+        self.__updateToolMenuActions()
+        
+        # restore current item
+        if self.__selectedRevisions:
+            for revision in self.__selectedRevisions:
+                items = self.logTree.findItems(
+                    revision, Qt.MatchExactly, self.RevisionColumn)
+                if items:
+                    items[0].setSelected(True)
+            self.__selectedRevisions = []
+    
+    def __readStdout(self):
+        """
+        Private slot to handle the readyReadStandardOutput signal.
+        
+        It reads the output of the process and inserts it into a buffer.
+        """
+        self.process.setReadChannel(QProcess.StandardOutput)
+        
+        while self.process.canReadLine():
+            line = str(self.process.readLine(), self.vcs.getEncoding(),
+                       'replace')
+            self.buf.append(line)
+    
+    def __readStderr(self):
+        """
+        Private slot to handle the readyReadStandardError signal.
+        
+        It reads the error output of the process and inserts it into the
+        error pane.
+        """
+        if self.process is not None:
+            s = str(self.process.readAllStandardError(),
+                    self.vcs.getEncoding(), 'replace')
+            self.__showError(s)
+    
+    def __showError(self, out):
+        """
+        Private slot to show some error.
+        
+        @param out error to be shown (string)
+        """
+        self.errorGroup.show()
+        self.errors.insertPlainText(out)
+        self.errors.ensureCursorVisible()
+        
+        if not self.__hgClient:
+            # show input in case the process asked for some input
+            self.inputGroup.setEnabled(True)
+            self.inputGroup.show()
+    
+    def on_buttonBox_clicked(self, button):
+        """
+        Private slot called by a button of the button box clicked.
+        
+        @param button button that was clicked (QAbstractButton)
+        """
+        if button == self.buttonBox.button(QDialogButtonBox.Close):
+            self.close()
+        elif button == self.buttonBox.button(QDialogButtonBox.Cancel):
+            self.cancelled = True
+            if self.__hgClient:
+                self.__hgClient.cancel()
+            else:
+                self.__finish()
+        elif button == self.refreshButton:
+            self.on_refreshButton_clicked()
+    
+    def __updateSbsSelectLabel(self):
+        """
+        Private slot to update the enabled status of the diff buttons.
+        """
+        self.sbsSelectLabel.clear()
+        if self.__isFile:
+            selectedItems = self.logTree.selectedItems()
+            if len(selectedItems) == 1:
+                currentItem = selectedItems[0]
+                rev2 = currentItem.text(self.RevisionColumn).split(":", 1)[0]\
+                    .strip()
+                parents = currentItem.data(0, self.__parentsRole)
+                if parents:
+                    parentLinks = []
+                    for index in range(len(parents)):
+                        parentLinks.append(
+                            '<a href="sbsdiff:{0}_{1}">&nbsp;{2}&nbsp;</a>'
+                            .format(parents[index], rev2, index + 1))
+                    self.sbsSelectLabel.setText(
+                        self.tr('Side-by-Side Diff to Parent {0}').format(
+                            " ".join(parentLinks)))
+            elif len(selectedItems) == 2:
+                rev1 = int(selectedItems[0].text(self.RevisionColumn)
+                           .split(":", 1)[0])
+                rev2 = int(selectedItems[1].text(self.RevisionColumn)
+                           .split(":", 1)[0])
+                if rev1 > rev2:
+                    # Swap the entries, so that rev1 < rev2
+                    rev1, rev2 = rev2, rev1
+                self.sbsSelectLabel.setText(self.tr(
+                    '<a href="sbsdiff:{0}_{1}">Side-by-Side Compare</a>')
+                    .format(rev1, rev2))
+    
+    def __updateToolMenuActions(self):
+        """
+        Private slot to update the status of the tool menu actions and
+        the tool menu button.
+        """
+        if self.initialCommandMode == "log" and self.projectMode:
+            # do the phase action
+            # step 1: count entries with changeable phases
+            secret = 0
+            draft = 0
+            public = 0
+            for itm in self.logTree.selectedItems():
+                phase = itm.text(self.PhaseColumn)
+                if phase == self.phases["draft"]:
+                    draft += 1
+                elif phase == self.phases["secret"]:
+                    secret += 1
+                else:
+                    public += 1
+            
+            # step 2: set the status of the phase action
+            if public == 0 and \
+               ((secret > 0 and draft == 0) or
+                    (secret == 0 and draft > 0)):
+                self.__phaseAct.setEnabled(True)
+            else:
+                self.__phaseAct.setEnabled(False)
+            
+            # do the graft action
+            # step 1: count selected entries not belonging to the
+            #         current branch
+            otherBranches = 0
+            for itm in self.logTree.selectedItems():
+                branch = itm.text(self.BranchColumn)
+                if branch != self.__projectBranch:
+                    otherBranches += 1
+            
+            # step 2: set the status of the graft action
+            self.__graftAct.setEnabled(otherBranches > 0)
+            
+            selectedItemsCount = len(self.logTree.selectedItems())
+            self.__mergeAct.setEnabled(selectedItemsCount == 1)
+            self.__tagAct.setEnabled(selectedItemsCount == 1)
+            self.__switchAct.setEnabled(selectedItemsCount == 1)
+            self.__bookmarkAct.setEnabled(selectedItemsCount == 1)
+            self.__bookmarkMoveAct.setEnabled(selectedItemsCount == 1)
+            
+            self.__pullAct.setText(self.tr("Pull Changes"))
+            self.__fetchAct.setText(self.tr("Fetch Changes"))
+            if self.vcs.canPull():
+                self.__pullAct.setEnabled(True)
+                self.__lfPullAct.setEnabled(
+                    self.vcs.isExtensionActive("largefiles") and
+                    selectedItemsCount > 0)
+                self.__fetchAct.setEnabled(
+                    self.vcs.isExtensionActive("fetch"))
+            else:
+                self.__pullAct.setEnabled(False)
+                self.__lfPullAct.setEnabled(False)
+                self.__fetchAct.setEnabled(False)
+            
+            if self.vcs.canPush():
+                self.__pushAct.setEnabled(
+                    selectedItemsCount == 1 and
+                    self.logTree.selectedItems()[0].text(self.PhaseColumn) ==
+                    self.phases["draft"])
+                self.__pushAllAct.setEnabled(True)
+            else:
+                self.__pushAct.setEnabled(False)
+                self.__pushAllAct.setEnabled(False)
+            
+            self.__stripAct.setEnabled(
+                self.vcs.isExtensionActive("strip") and
+                selectedItemsCount == 1)
+            
+            self.__bundleAct.setEnabled(self.logTree.topLevelItemCount() > 0)
+            self.__unbundleAct.setEnabled(False)
+            
+            self.__gpgSignAct.setEnabled(
+                self.vcs.isExtensionActive("gpg") and
+                selectedItemsCount > 0)
+            self.__gpgVerifyAct.setEnabled(
+                self.vcs.isExtensionActive("gpg") and
+                selectedItemsCount == 1)
+            
+            self.actionsButton.setEnabled(True)
+        
+        elif self.initialCommandMode == "incoming" and self.projectMode:
+            for act in [self.__phaseAct, self.__graftAct, self.__mergeAct,
+                        self.__tagAct, self.__switchAct, self.__bookmarkAct,
+                        self.__bookmarkMoveAct, self.__pushAct,
+                        self.__pushAllAct, self.__stripAct, self.__bundleAct,
+                        self.__gpgSignAct, self.__gpgVerifyAct]:
+                act.setEnabled(False)
+            
+            self.__pullAct.setText(self.tr("Pull Selected Changes"))
+            self.__fetchAct.setText(self.tr("Fetch Selected Changes"))
+            if self.vcs.canPull() and not bool(self.__bundle):
+                # step 1: determine number of selected draft changesets
+                #         i.e. those that can be pulled
+                selectedDraftItemsCount = 0
+                for itm in self.logTree.selectedItems():
+                    phase = itm.text(self.PhaseColumn)
+                    if phase == self.phases["draft"]:
+                        selectedDraftItemsCount += 1
+                self.__pullAct.setEnabled(selectedDraftItemsCount > 0)
+                self.__lfPullAct.setEnabled(
+                    self.vcs.isExtensionActive("largefiles") and
+                    selectedItemsCount > 0)
+                self.__fetchAct.setEnabled(
+                    self.vcs.isExtensionActive("fetch") and
+                    selectedDraftItemsCount > 0)
+            else:
+                self.__pullAct.setEnabled(False)
+                self.__lfPullAct.setEnabled(False)
+                self.__fetchAct.setEnabled(False)
+            
+            self.__unbundleAct.setEnabled(bool(self.__bundle))
+            
+            self.actionsButton.setEnabled(True)
+        
+        elif self.initialCommandMode == "outgoing" and self.projectMode:
+            for act in [self.__phaseAct, self.__graftAct, self.__mergeAct,
+                        self.__tagAct, self.__switchAct, self.__bookmarkAct,
+                        self.__bookmarkMoveAct, self.__pullAct,
+                        self.__lfPullAct, self.__fetchAct, self.__stripAct,
+                        self.__gpgSignAct, self.__gpgVerifyAct,
+                        self.__unbundleAct]:
+                act.setEnabled(False)
+            
+            selectedItemsCount = len(self.logTree.selectedItems())
+            if self.vcs.canPush():
+                self.__pushAct.setEnabled(
+                    selectedItemsCount == 1 and
+                    self.logTree.selectedItems()[0].text(self.PhaseColumn) ==
+                    self.phases["draft"])
+                self.__pushAllAct.setEnabled(True)
+            else:
+                self.__pushAct.setEnabled(False)
+                self.__pushAllAct.setEnabled(False)
+            
+            self.__bundleAct.setEnabled(selectedItemsCount > 0)
+        
+        else:
+            self.actionsButton.setEnabled(False)
+    
+    def __updateDetailsAndFiles(self):
+        """
+        Private slot to update the details and file changes panes.
+        """
+        self.detailsEdit.clear()
+        self.filesTree.clear()
+        self.__diffUpdatesFiles = False
+        
+        selectedItems = self.logTree.selectedItems()
+        if len(selectedItems) == 1:
+            self.detailsEdit.setHtml(
+                self.__generateDetailsTableText(selectedItems[0]))
+            self.__updateFilesTree(self.filesTree, selectedItems[0])
+            self.__resizeColumnsFiles()
+            self.__resortFiles()
+        elif len(selectedItems) == 2:
+            self.__diffUpdatesFiles = True
+            index1 = self.logTree.indexOfTopLevelItem(selectedItems[0])
+            index2 = self.logTree.indexOfTopLevelItem(selectedItems[1])
+            if index1 > index2:
+                # Swap the entries
+                selectedItems[0], selectedItems[1] = \
+                    selectedItems[1], selectedItems[0]
+            html = "{0}<hr/>{1}".format(
+                self.__generateDetailsTableText(selectedItems[0]),
+                self.__generateDetailsTableText(selectedItems[1]),
+            )
+            self.detailsEdit.setHtml(html)
+            # self.filesTree is updated by the diff
+    
+    def __generateDetailsTableText(self, itm):
+        """
+        Private method to generate an HTML table with the details of the given
+        changeset.
+        
+        @param itm reference to the item the table should be based on
+        @type QTreeWidgetItem
+        @return HTML table containing details
+        @rtype str
+        """
+        if itm is not None:
+            if itm.text(self.TagsColumn):
+                tagsStr = self.__tagsTemplate.format(itm.text(self.TagsColumn))
+            else:
+                tagsStr = ""
+            
+            if itm.text(self.BookmarksColumn):
+                bookmarksStr = self.__bookmarksTemplate.format(
+                    itm.text(self.BookmarksColumn))
+            else:
+                bookmarksStr = ""
+            
+            if self.projectMode and itm.data(0, self.__latestTagRole):
+                latestTagLinks = []
+                for tag in itm.data(0, self.__latestTagRole):
+                    latestTagLinks.append('<a href="rev:{0}">{1}</a>'.format(
+                        self.__getRevisionOfTag(tag)[0], tag))
+                latestTagStr = self.__latestTagTemplate.format(
+                    ", ".join(latestTagLinks))
+            else:
+                latestTagStr = ""
+            
+            rev = int(itm.text(self.RevisionColumn).split(":", 1)[0])
+            
+            if itm.data(0, self.__parentsRole):
+                parentLinks = []
+                for parent in [str(x) for x in
+                               itm.data(0, self.__parentsRole)]:
+                    parentLinks.append(
+                        '<a href="rev:{0}">{0}</a>'.format(parent))
+                parentsStr = self.__parentsTemplate.format(
+                    ", ".join(parentLinks))
+            else:
+                parentsStr = ""
+            
+            if self.__childrenInfo[rev]:
+                childLinks = []
+                for child in [str(x) for x in self.__childrenInfo[rev]]:
+                    childLinks.append(
+                        '<a href="rev:{0}">{0}</a>'.format(child))
+                childrenStr = self.__childrenTemplate.format(
+                    ", ".join(childLinks))
+            else:
+                childrenStr = ""
+            
+            messageStr = "<br />\n".join([
+                Utilities.html_encode(line.strip())
+                for line in itm.data(0, self.__messageRole)
+            ])
+            
+            html = self.__detailsTemplate.format(
+                itm.text(self.RevisionColumn),
+                itm.text(self.DateColumn),
+                itm.text(self.AuthorColumn),
+                itm.text(self.BranchColumn).replace(
+                    self.ClosedIndicator, ""),
+                parentsStr + childrenStr + tagsStr + latestTagStr +
+                bookmarksStr,
+                messageStr,
+            )
+        else:
+            html = ""
+        
+        return html
+    
+    def __updateFilesTree(self, parent, itm):
+        """
+        Private method to update the files tree with changes of the given item.
+        
+        @param parent parent for the items to be added
+        @type QTreeWidget or QTreeWidgetItem
+        @param itm reference to the item the update should be based on
+        @type QTreeWidgetItem
+        """
+        if itm is not None:
+            changes = itm.data(0, self.__changesRole)
+            if len(changes) > 0:
+                for change in changes:
+                    QTreeWidgetItem(parent, [
+                        self.flags[change["action"]],
+                        change["path"].strip(),
+                        change["copyfrom"].strip(),
+                    ])
+    
+    @pyqtSlot(QTreeWidgetItem, QTreeWidgetItem)
+    def on_logTree_currentItemChanged(self, current, previous):
+        """
+        Private slot called, when the current item of the log tree changes.
+        
+        @param current reference to the new current item (QTreeWidgetItem)
+        @param previous reference to the old current item (QTreeWidgetItem)
+        """
+        self.__updateToolMenuActions()
+        
+        # Highlight the current entry using a bold font
+        for col in range(self.logTree.columnCount()):
+            current and current.setFont(col, self.__logTreeBoldFont)
+            previous and previous.setFont(col, self.__logTreeNormalFont)
+        
+        # set the state of the up and down buttons
+        self.upButton.setEnabled(
+            current is not None and
+            self.logTree.indexOfTopLevelItem(current) > 0)
+        self.downButton.setEnabled(
+            current is not None and
+            int(current.text(self.RevisionColumn).split(":")[0]) > 0 and
+            (self.logTree.indexOfTopLevelItem(current) <
+                self.logTree.topLevelItemCount() - 1 or
+             self.nextButton.isEnabled()))
+    
+    @pyqtSlot()
+    def on_logTree_itemSelectionChanged(self):
+        """
+        Private slot called, when the selection has changed.
+        """
+        self.__updateDetailsAndFiles()
+        self.__updateSbsSelectLabel()
+        self.__updateToolMenuActions()
+        self.__generateDiffs()
+    
+    @pyqtSlot()
+    def on_upButton_clicked(self):
+        """
+        Private slot to move the current item up one entry.
+        """
+        itm = self.logTree.itemAbove(self.logTree.currentItem())
+        if itm:
+            self.logTree.setCurrentItem(itm)
+    
+    @pyqtSlot()
+    def on_downButton_clicked(self):
+        """
+        Private slot to move the current item down one entry.
+        """
+        itm = self.logTree.itemBelow(self.logTree.currentItem())
+        if itm:
+            self.logTree.setCurrentItem(itm)
+        else:
+            # load the next bunch and try again
+            if self.nextButton.isEnabled():
+                self.__addFinishCallback(self.on_downButton_clicked)
+                self.on_nextButton_clicked()
+    
+    @pyqtSlot()
+    def on_nextButton_clicked(self):
+        """
+        Private slot to handle the Next button.
+        """
+        if self.__lastRev > 0 and self.nextButton.isEnabled():
+            self.__getLogEntries(startRev=self.__lastRev - 1)
+    
+    @pyqtSlot(QDate)
+    def on_fromDate_dateChanged(self, date):
+        """
+        Private slot called, when the from date changes.
+        
+        @param date new date (QDate)
+        """
+        if self.__actionMode() == "filter":
+            self.__filterLogs()
+    
+    @pyqtSlot(QDate)
+    def on_toDate_dateChanged(self, date):
+        """
+        Private slot called, when the from date changes.
+        
+        @param date new date (QDate)
+        """
+        if self.__actionMode() == "filter":
+            self.__filterLogs()
+    
+    @pyqtSlot(str)
+    def on_branchCombo_activated(self, txt):
+        """
+        Private slot called, when a new branch is selected.
+        
+        @param txt text of the selected branch (string)
+        """
+        if self.__actionMode() == "filter":
+            self.__filterLogs()
+    
+    @pyqtSlot(str)
+    def on_fieldCombo_activated(self, txt):
+        """
+        Private slot called, when a new filter field is selected.
+        
+        @param txt text of the selected field (string)
+        """
+        if self.__actionMode() == "filter":
+            self.__filterLogs()
+    
+    @pyqtSlot(str)
+    def on_rxEdit_textChanged(self, txt):
+        """
+        Private slot called, when a filter expression is entered.
+        
+        @param txt filter expression (string)
+        """
+        if self.__actionMode() == "filter":
+            self.__filterLogs()
+        elif self.__actionMode() == "find":
+            self.__findItem(self.__findBackwards, interactive=True)
+    
+    @pyqtSlot()
+    def on_rxEdit_returnPressed(self):
+        """
+        Private slot handling a press of the Return key in the rxEdit input.
+        """
+        if self.__actionMode() == "find":
+            self.__findItem(self.__findBackwards, interactive=True)
+    
+    def __filterLogs(self):
+        """
+        Private method to filter the log entries.
+        """
+        if self.__filterLogsEnabled:
+            from_ = self.fromDate.date().toString("yyyy-MM-dd")
+            to_ = self.toDate.date().addDays(1).toString("yyyy-MM-dd")
+            branch = self.branchCombo.currentText()
+            closedBranch = branch + '--'
+            fieldIndex, searchRx, indexIsRole = self.__prepareFieldSearch()
+            
+            visibleItemCount = self.logTree.topLevelItemCount()
+            currentItem = self.logTree.currentItem()
+            for topIndex in range(self.logTree.topLevelItemCount()):
+                topItem = self.logTree.topLevelItem(topIndex)
+                if indexIsRole:
+                    if fieldIndex == self.__changesRole:
+                        changes = topItem.data(0, self.__changesRole)
+                        txt = "\n".join(
+                            [c["path"] for c in changes] +
+                            [c["copyfrom"] for c in changes]
+                        )
+                    else:
+                        # Find based on complete message text
+                        txt = "\n".join(topItem.data(0, self.__messageRole))
+                else:
+                    txt = topItem.text(fieldIndex)
+                if topItem.text(self.DateColumn) <= to_ and \
+                   topItem.text(self.DateColumn) >= from_ and \
+                   (branch == self.__allBranchesFilter or
+                    topItem.text(self.BranchColumn) in
+                        [branch, closedBranch]) and \
+                   searchRx.indexIn(txt) > -1:
+                    topItem.setHidden(False)
+                    if topItem is currentItem:
+                        self.on_logTree_currentItemChanged(topItem, None)
+                else:
+                    topItem.setHidden(True)
+                    if topItem is currentItem:
+                        self.filesTree.clear()
+                    visibleItemCount -= 1
+            self.logTree.header().setSectionHidden(
+                self.IconColumn,
+                visibleItemCount != self.logTree.topLevelItemCount())
+    
+    def __prepareFieldSearch(self):
+        """
+        Private slot to prepare the filed search data.
+        
+        @return tuple of field index, search expression and flag indicating
+            that the field index is a data role (integer, string, boolean)
+        """
+        indexIsRole = False
+        txt = self.fieldCombo.itemData(self.fieldCombo.currentIndex())
+        if txt == "author":
+            fieldIndex = self.AuthorColumn
+            searchRx = QRegExp(self.rxEdit.text(), Qt.CaseInsensitive)
+        elif txt == "revision":
+            fieldIndex = self.RevisionColumn
+            txt = self.rxEdit.text()
+            if txt.startswith("^"):
+                searchRx = QRegExp(r"^\s*{0}".format(txt[1:]),
+                                   Qt.CaseInsensitive)
+            else:
+                searchRx = QRegExp(txt, Qt.CaseInsensitive)
+        elif txt == "file":
+            fieldIndex = self.__changesRole
+            searchRx = QRegExp(self.rxEdit.text(), Qt.CaseInsensitive)
+            indexIsRole = True
+        else:
+            fieldIndex = self.__messageRole
+            searchRx = QRegExp(self.rxEdit.text(), Qt.CaseInsensitive)
+            indexIsRole = True
+        
+        return fieldIndex, searchRx, indexIsRole
+    
+    @pyqtSlot(bool)
+    def on_stopCheckBox_clicked(self, checked):
+        """
+        Private slot called, when the stop on copy/move checkbox is clicked.
+        
+        @param checked flag indicating the state of the check box (boolean)
+        """
+        self.vcs.getPlugin().setPreferences("StopLogOnCopy",
+                                            self.stopCheckBox.isChecked())
+        self.nextButton.setEnabled(True)
+        self.limitSpinBox.setEnabled(True)
+    
+    @pyqtSlot()
+    def on_refreshButton_clicked(self):
+        """
+        Private slot to refresh the log.
+        """
+        self.buttonBox.button(QDialogButtonBox.Close).setEnabled(False)
+        self.buttonBox.button(QDialogButtonBox.Cancel).setEnabled(True)
+        self.buttonBox.button(QDialogButtonBox.Cancel).setDefault(True)
+        
+        self.refreshButton.setEnabled(False)
+        
+        # save the selected items commit IDs
+        self.__selectedRevisions = []
+        for item in self.logTree.selectedItems():
+            self.__selectedRevisions.append(item.text(self.RevisionColumn))
+        
+        if self.initialCommandMode in ("incoming", "outgoing"):
+            self.nextButton.setEnabled(False)
+            self.limitSpinBox.setEnabled(False)
+        else:
+            self.nextButton.setEnabled(True)
+            self.limitSpinBox.setEnabled(True)
+        
+        self.commandMode = self.initialCommandMode
+        self.start(self.__filename, isFile=self.__isFile,
+                   noEntries=self.logTree.topLevelItemCount())
+    
+    def on_passwordCheckBox_toggled(self, isOn):
+        """
+        Private slot to handle the password checkbox toggled.
+        
+        @param isOn flag indicating the status of the check box (boolean)
+        """
+        if isOn:
+            self.input.setEchoMode(QLineEdit.Password)
+        else:
+            self.input.setEchoMode(QLineEdit.Normal)
+    
+    @pyqtSlot()
+    def on_sendButton_clicked(self):
+        """
+        Private slot to send the input to the mercurial process.
+        """
+        inputTxt = self.input.text()
+        inputTxt += os.linesep
+        
+        if self.passwordCheckBox.isChecked():
+            self.errors.insertPlainText(os.linesep)
+            self.errors.ensureCursorVisible()
+        else:
+            self.errors.insertPlainText(inputTxt)
+            self.errors.ensureCursorVisible()
+        
+        self.process.write(strToQByteArray(inputTxt))
+        
+        self.passwordCheckBox.setChecked(False)
+        self.input.clear()
+    
+    def on_input_returnPressed(self):
+        """
+        Private slot to handle the press of the return key in the input field.
+        """
+        self.intercept = True
+        self.on_sendButton_clicked()
+    
+    def keyPressEvent(self, evt):
+        """
+        Protected slot to handle a key press event.
+        
+        @param evt the key press event (QKeyEvent)
+        """
+        if self.intercept:
+            self.intercept = False
+            evt.accept()
+            return
+        super(HgLogBrowserDialog, self).keyPressEvent(evt)
+    
+    @pyqtSlot()
+    def __phaseActTriggered(self):
+        """
+        Private slot to handle the Change Phase action.
+        """
+        currentPhase = self.logTree.selectedItems()[0].text(self.PhaseColumn)
+        revs = []
+        for itm in self.logTree.selectedItems():
+            if itm.text(self.PhaseColumn) == currentPhase:
+                revs.append(
+                    itm.text(self.RevisionColumn).split(":")[0].strip())
+        
+        if not revs:
+            self.__phaseAct.setEnabled(False)
+            return
+        
+        if currentPhase == self.phases["draft"]:
+            newPhase = self.phases["secret"]
+            data = (revs, "s", True)
+        else:
+            newPhase = self.phases["draft"]
+            data = (revs, "d", False)
+        res = self.vcs.hgPhase(self.repodir, data)
+        if res:
+            for itm in self.logTree.selectedItems():
+                itm.setText(self.PhaseColumn, newPhase)
+    
+    @pyqtSlot()
+    def __graftActTriggered(self):
+        """
+        Private slot to handle the Copy Changesets action.
+        """
+        revs = []
+        
+        for itm in self.logTree.selectedItems():
+            branch = itm.text(self.BranchColumn)
+            if branch != self.__projectBranch:
+                revs.append(
+                    itm.text(self.RevisionColumn).strip().split(":", 1)[0])
+        
+        if revs:
+            shouldReopen = self.vcs.hgGraft(self.repodir, revs)
+            if shouldReopen:
+                res = E5MessageBox.yesNo(
+                    None,
+                    self.tr("Copy Changesets"),
+                    self.tr(
+                        """The project should be reread. Do this now?"""),
+                    yesDefault=True)
+                if res:
+                    e5App().getObject("Project").reopenProject()
+                    return
+            
+            self.on_refreshButton_clicked()
+    
+    @pyqtSlot()
+    def __tagActTriggered(self):
+        """
+        Private slot to tag the selected revision.
+        """
+        if len(self.logTree.selectedItems()) == 1:
+            itm = self.logTree.selectedItems()[0]
+            rev = itm.text(self.RevisionColumn).strip().split(":", 1)[0]
+            tag = itm.text(self.TagsColumn).strip().split(", ", 1)[0]
+            res = self.vcs.vcsTag(self.repodir, revision=rev, tagName=tag)
+            if res:
+                self.on_refreshButton_clicked()
+    
+    @pyqtSlot()
+    def __switchActTriggered(self):
+        """
+        Private slot to switch the working directory to the
+        selected revision.
+        """
+        if len(self.logTree.selectedItems()) == 1:
+            itm = self.logTree.selectedItems()[0]
+            rev = itm.text(self.RevisionColumn).strip().split(":", 1)[0]
+            bookmarks = [bm.strip() for bm in
+                         itm.text(self.BookmarksColumn).strip().split(",")
+                         if bm.strip()]
+            if bookmarks:
+                bookmark, ok = QInputDialog.getItem(
+                    self,
+                    self.tr("Switch"),
+                    self.tr("Select bookmark to switch to (leave empty to"
+                            " use revision):"),
+                    [""] + bookmarks,
+                    0, False)
+                if not ok:
+                    return
+                if bookmark:
+                    rev = bookmark
+            if rev:
+                shouldReopen = self.vcs.vcsUpdate(self.repodir, revision=rev)
+                if shouldReopen:
+                    res = E5MessageBox.yesNo(
+                        None,
+                        self.tr("Switch"),
+                        self.tr(
+                            """The project should be reread. Do this now?"""),
+                        yesDefault=True)
+                    if res:
+                        e5App().getObject("Project").reopenProject()
+                        return
+                
+                self.on_refreshButton_clicked()
+    
+    @pyqtSlot()
+    def __bookmarkActTriggered(self):
+        """
+        Private slot to bookmark the selected revision.
+        """
+        if len(self.logTree.selectedItems()) == 1:
+            itm = self.logTree.selectedItems()[0]
+            rev, changeset = \
+                itm.text(self.RevisionColumn).strip().split(":", 1)
+            bookmark, ok = QInputDialog.getText(
+                self,
+                self.tr("Define Bookmark"),
+                self.tr('Enter bookmark name for changeset "{0}":').format(
+                    changeset),
+                QLineEdit.Normal)
+            if ok and bool(bookmark):
+                self.vcs.hgBookmarkDefine(
+                    self.repodir, revision="rev({0})".format(rev),
+                    bookmark=bookmark)
+                self.on_refreshButton_clicked()
+    
+    @pyqtSlot()
+    def __bookmarkMoveActTriggered(self):
+        """
+        Private slot to move a bookmark to the selected revision.
+        """
+        if len(self.logTree.selectedItems()) == 1:
+            itm = self.logTree.selectedItems()[0]
+            rev, changeset = \
+                itm.text(self.RevisionColumn).strip().split(":", 1)
+            bookmarksList = self.vcs.hgGetBookmarksList(self.repodir)
+            bookmark, ok = QInputDialog.getItem(
+                self,
+                self.tr("Move Bookmark"),
+                self.tr('Select the bookmark to be moved  to changeset'
+                        ' "{0}":').format(changeset),
+                [""] + bookmarksList,
+                0, False)
+            if ok and bool(bookmark):
+                self.vcs.hgBookmarkMove(
+                    self.repodir, revision="rev({0})".format(rev),
+                    bookmark=bookmark)
+                self.on_refreshButton_clicked()
+    
+    @pyqtSlot()
+    def __lfPullActTriggered(self):
+        """
+        Private slot to pull large files of selected revisions.
+        """
+        revs = []
+        for itm in self.logTree.selectedItems():
+            rev = itm.text(self.RevisionColumn).strip().split(":", 1)[0]
+            if rev:
+                revs.append(rev)
+        
+        if revs:
+            self.vcs.getExtensionObject("largefiles").hgLfPull(
+                self.repodir, revisions=revs)
+    
+    @pyqtSlot()
+    def __fetchActTriggered(self):
+        """
+        Private slot to fetch changes from a remote repository.
+        """
+        shouldReopen = False
+        refresh = False
+        
+        if self.initialCommandMode == "log":
+            shouldReopen = self.vcs.getExtensionObject("fetch").hgFetch(
+                self.repodir)
+            refresh = True
+        elif self.initialCommandMode == "incoming":
+            revs = []
+            for itm in self.logTree.selectedItems():
+                rev = itm.text(self.RevisionColumn).split(":")[1].strip()
+                phase = itm.text(self.PhaseColumn).strip()
+                if rev and phase == self.phases["draft"]:
+                    revs.append(rev)
+            if revs:
+                shouldReopen = self.vcs.getExtensionObject("fetch").hgFetch(
+                    self.repodir, )
+                refresh = True
+        if shouldReopen:
+            res = E5MessageBox.yesNo(
+                None,
+                self.tr("Fetch Changes"),
+                self.tr(
+                    """The project should be reread. Do this now?"""),
+                yesDefault=True)
+            if res:
+                e5App().getObject("Project").reopenProject()
+                return
+        
+        if refresh:
+            self.on_refreshButton_clicked()
+    
+    @pyqtSlot()
+    def __pullActTriggered(self):
+        """
+        Private slot to pull changes from a remote repository.
+        """
+        shouldReopen = False
+        refresh = False
+        
+        if self.initialCommandMode == "log":
+            shouldReopen = self.vcs.hgPull(self.repodir)
+            refresh = True
+        elif self.initialCommandMode == "incoming":
+            revs = []
+            for itm in self.logTree.selectedItems():
+                rev = itm.text(self.RevisionColumn).split(":")[1].strip()
+                phase = itm.text(self.PhaseColumn).strip()
+                if rev and phase == self.phases["draft"]:
+                    revs.append(rev)
+            if revs:
+                shouldReopen = self.vcs.hgPull(self.repodir, revisions=revs)
+                refresh = True
+        
+        if shouldReopen:
+            res = E5MessageBox.yesNo(
+                None,
+                self.tr("Pull Changes"),
+                self.tr(
+                    """The project should be reread. Do this now?"""),
+                yesDefault=True)
+            if res:
+                e5App().getObject("Project").reopenProject()
+                return
+        
+        if refresh:
+            self.on_refreshButton_clicked()
+    
+    @pyqtSlot()
+    def __pushActTriggered(self):
+        """
+        Private slot to push changes to a remote repository up to a selected
+        changeset.
+        """
+        itm = self.logTree.selectedItems()[0]
+        rev = itm.text(self.RevisionColumn).strip().split(":", 1)[0]
+        if rev:
+            self.vcs.hgPush(self.repodir, rev=rev)
+            self.on_refreshButton_clicked()
+    
+    @pyqtSlot()
+    def __pushAllActTriggered(self):
+        """
+        Private slot to push all changes to a remote repository.
+        """
+        self.vcs.hgPush(self.repodir)
+        self.on_refreshButton_clicked()
+    
+    @pyqtSlot()
+    def __stripActTriggered(self):
+        """
+        Private slot to strip changesets from the repository.
+        """
+        itm = self.logTree.selectedItems()[0]
+        rev = itm.text(self.RevisionColumn).strip().split(":", 1)[1]
+        shouldReopen = self.vcs.getExtensionObject("strip").hgStrip(
+            self.repodir, rev=rev)
+        if shouldReopen:
+            res = E5MessageBox.yesNo(
+                None,
+                self.tr("Strip Changesets"),
+                self.tr(
+                    """The project should be reread. Do this now?"""),
+                yesDefault=True)
+            if res:
+                e5App().getObject("Project").reopenProject()
+                return
+        
+        self.on_refreshButton_clicked()
+    
+    @pyqtSlot()
+    def __mergeActTriggered(self):
+        """
+        Private slot to merge the working directory with the selected
+        changeset.
+        """
+        itm = self.logTree.selectedItems()[0]
+        rev = "rev({0})".format(
+            itm.text(self.RevisionColumn).strip().split(":", 1)[0])
+        self.vcs.vcsMerge(self.repodir, rev=rev)
+    
+    @pyqtSlot()
+    def __bundleActTriggered(self):
+        """
+        Private slot to create a changegroup file.
+        """
+        if self.initialCommandMode == "log":
+            selectedItems = self.logTree.selectedItems()
+            if len(selectedItems) == 0:
+                # all revisions of the local repository will be bundled
+                bundleData = {
+                    "revs": [],
+                    "base": "",
+                    "all": True,
+                }
+            elif len(selectedItems) == 1:
+                # the selected changeset is the base
+                rev = selectedItems[0].text(self.RevisionColumn)\
+                    .split(":", 1)[0].strip()
+                bundleData = {
+                    "revs": [],
+                    "base": rev,
+                    "all": False,
+                }
+            else:
+                # lowest revision is the base, others will be bundled
+                revs = []
+                for itm in selectedItems:
+                    rev = itm.text(self.RevisionColumn).split(":", 1)[0]
+                    try:
+                        revs.append(int(rev))
+                    except ValueError:
+                        # ignore silently
+                        pass
+                baseRev = min(revs)
+                while baseRev in revs:
+                    revs.remove(baseRev)
+                
+                bundleData = {
+                    "revs": [str(rev) for rev in revs],
+                    "base": str(baseRev),
+                    "all": False,
+                }
+        elif self.initialCommandMode == "outgoing":
+            selectedItems = self.logTree.selectedItems()
+            if len(selectedItems) > 0:
+                revs = []
+                for itm in selectedItems:
+                    rev = itm.text(self.RevisionColumn).split(":", 1)[0]
+                    revs.append(rev.strip())
+                
+                bundleData = {
+                    "revs": revs,
+                    "base": "",
+                    "all": False,
+                }
+        
+        self.vcs.hgBundle(self.repodir, bundleData=bundleData)
+    
+    @pyqtSlot()
+    def __unbundleActTriggered(self):
+        """
+        Private slot to apply the currently previewed bundle file.
+        """
+        if self.initialCommandMode == "incoming" and bool(self.__bundle):
+            shouldReopen = self.vcs.hgUnbundle(self.repodir,
+                                               files=[self.__bundle])
+            if shouldReopen:
+                res = E5MessageBox.yesNo(
+                    None,
+                    self.tr("Apply Changegroup"),
+                    self.tr("""The project should be reread. Do this now?"""),
+                    yesDefault=True)
+                if res:
+                    e5App().getObject("Project").reopenProject()
+                    return
+            
+            self.vcs.vcsLogBrowser(self.repodir)
+            self.close()
+    
+    @pyqtSlot()
+    def __gpgSignActTriggered(self):
+        """
+        Private slot to sign the selected revisions.
+        """
+        revs = []
+        for itm in self.logTree.selectedItems():
+            rev = itm.text(self.RevisionColumn).split(":", 1)[0].strip()
+            if rev:
+                revs.append(rev)
+        
+        if revs:
+            self.vcs.getExtensionObject("gpg").hgGpgSign(
+                self.repodir, revisions=revs)
+    
+    @pyqtSlot()
+    def __gpgVerifyActTriggered(self):
+        """
+        Private slot to verify the signatures of a selected revisions.
+        """
+        rev = self.logTree.selectedItems()[0].text(self.RevisionColumn)\
+            .split(":", 1)[0].strip()
+        if rev:
+            self.vcs.getExtensionObject("gpg").hgGpgVerifySignatures(
+                self.repodir, rev=rev)
+    
+    def __selectAllActTriggered(self, select=True):
+        """
+        Private method to select or unselect all log entries.
+        
+        @param select flag indicating to select all entries
+        @type bool
+        """
+        blocked = self.logTree.blockSignals(True)
+        for row in range(self.logTree.topLevelItemCount()):
+            self.logTree.topLevelItem(row).setSelected(select)
+        self.logTree.blockSignals(blocked)
+        self.on_logTree_itemSelectionChanged()
+    
+    def __actionMode(self):
+        """
+        Private method to get the selected action mode.
+        
+        @return selected action mode (string, one of filter or find)
+        """
+        return self.modeComboBox.itemData(
+            self.modeComboBox.currentIndex())
+    
+    @pyqtSlot(int)
+    def on_modeComboBox_currentIndexChanged(self, index):
+        """
+        Private slot to react on mode changes.
+        
+        @param index index of the selected entry (integer)
+        """
+        mode = self.modeComboBox.itemData(index)
+        findMode = mode == "find"
+        filterMode = mode == "filter"
+        
+        self.fromDate.setEnabled(filterMode)
+        self.toDate.setEnabled(filterMode)
+        self.branchCombo.setEnabled(filterMode)
+        self.findPrevButton.setVisible(findMode)
+        self.findNextButton.setVisible(findMode)
+        
+        if findMode:
+            for topIndex in range(self.logTree.topLevelItemCount()):
+                self.logTree.topLevelItem(topIndex).setHidden(False)
+            self.logTree.header().setSectionHidden(self.IconColumn, False)
+        elif filterMode:
+            self.__filterLogs()
+    
+    @pyqtSlot()
+    def on_findPrevButton_clicked(self):
+        """
+        Private slot to find the previous item matching the entered criteria.
+        """
+        self.__findItem(True)
+    
+    @pyqtSlot()
+    def on_findNextButton_clicked(self):
+        """
+        Private slot to find the next item matching the entered criteria.
+        """
+        self.__findItem(False)
+    
+    def __findItem(self, backwards=False, interactive=False):
+        """
+        Private slot to find an item matching the entered criteria.
+        
+        @param backwards flag indicating to search backwards (boolean)
+        @param interactive flag indicating an interactive search (boolean)
+        """
+        self.__findBackwards = backwards
+        
+        fieldIndex, searchRx, indexIsRole = self.__prepareFieldSearch()
+        currentIndex = self.logTree.indexOfTopLevelItem(
+            self.logTree.currentItem())
+        if backwards:
+            if interactive:
+                indexes = range(currentIndex, -1, -1)
+            else:
+                indexes = range(currentIndex - 1, -1, -1)
+        else:
+            if interactive:
+                indexes = range(currentIndex, self.logTree.topLevelItemCount())
+            else:
+                indexes = range(currentIndex + 1,
+                                self.logTree.topLevelItemCount())
+        
+        for index in indexes:
+            topItem = self.logTree.topLevelItem(index)
+            if indexIsRole:
+                if fieldIndex == self.__changesRole:
+                    changes = topItem.data(0, self.__changesRole)
+                    txt = "\n".join(
+                        [c["path"] for c in changes] +
+                        [c["copyfrom"] for c in changes]
+                    )
+                else:
+                    # Find based on complete message text
+                    txt = "\n".join(topItem.data(0, self.__messageRole))
+            else:
+                txt = topItem.text(fieldIndex)
+            if searchRx.indexIn(txt) > -1:
+                self.logTree.setCurrentItem(self.logTree.topLevelItem(index))
+                break
+        else:
+            E5MessageBox.information(
+                self,
+                self.tr("Find Commit"),
+                self.tr("""'{0}' was not found.""").format(self.rxEdit.text()))
+    
+    def __revisionClicked(self, url):
+        """
+        Private slot to handle the anchorClicked signal of the changeset
+        details pane.
+        
+        @param url URL that was clicked
+        @type QUrl
+        """
+        if url.scheme() == "rev":
+            # a parent or child revision was clicked, show the respective item
+            rev = url.path()
+            searchStr = "{0:>7}:".format(rev)
+            # format must be in sync with item generation format
+            items = self.logTree.findItems(searchStr, Qt.MatchStartsWith,
+                                           self.RevisionColumn)
+            if items:
+                itm = items[0]
+                if itm.isHidden():
+                    itm.setHidden(False)
+                self.logTree.setCurrentItem(itm)
+            else:
+                # load the next batch and try again
+                if self.nextButton.isEnabled():
+                    self.__addFinishCallback(
+                        lambda: self.__revisionClicked(url))
+                    self.on_nextButton_clicked()
+    
+    ###########################################################################
+    ## Diff handling methods below
+    ###########################################################################
+    
+    def __generateDiffs(self, parent=1):
+        """
+        Private slot to generate diff outputs for the selected item.
+        
+        @param parent number of parent to diff against
+        @type int
+        """
+        self.diffEdit.setPlainText(self.tr("Generating differences ..."))
+        self.diffLabel.setText(self.tr("Differences"))
+        self.diffSelectLabel.clear()
+        self.diffHighlighter.regenerateRules()
+        
+        selectedItems = self.logTree.selectedItems()
+        if len(selectedItems) == 1:
+            currentItem = selectedItems[0]
+            rev2 = currentItem.text(self.RevisionColumn).split(":", 1)[0]
+            parents = currentItem.data(0, self.__parentsRole)
+            if len(parents) >= parent:
+                self.diffLabel.setText(
+                    self.tr("Differences to Parent {0}").format(parent))
+                rev1 = parents[parent - 1]
+                
+                self.__diffGenerator.start(self.__filename, [rev1, rev2],
+                                           self.__bundle)
+            
+            if len(parents) > 1:
+                if parent == 1:
+                    par1 = "&nbsp;1&nbsp;"
+                else:
+                    par1 = '<a href="diff:1">&nbsp;1&nbsp;</a>'
+                if parent == 2:
+                    par2 = "&nbsp;2&nbsp;"
+                else:
+                    par2 = '<a href="diff:2">&nbsp;2&nbsp;</a>'
+                self.diffSelectLabel.setText(
+                    self.tr('Diff to Parent {0}{1}').format(par1, par2))
+        elif len(selectedItems) == 2:
+            rev2 = int(selectedItems[0].text(
+                self.RevisionColumn).split(":")[0])
+            rev1 = int(selectedItems[1].text(
+                self.RevisionColumn).split(":")[0])
+            
+            self.__diffGenerator.start(self.__filename,
+                                       [min(rev1, rev2), max(rev1, rev2)],
+                                       self.__bundle)
+        else:
+            self.diffEdit.clear()
+    
+    def __generatorFinished(self):
+        """
+        Private slot connected to the finished signal of the diff generator.
+        """
+        diff, errors, fileSeparators = self.__diffGenerator.getResult()
+        
+        if diff:
+            self.diffEdit.setPlainText("".join(diff))
+        elif errors:
+            self.diffEdit.setPlainText("".join(errors))
+        else:
+            self.diffEdit.setPlainText(self.tr('There is no difference.'))
+        
+        self.saveLabel.setVisible(bool(diff))
+        
+        if self.__diffUpdatesFiles:
+            for oldFileName, newFileName, lineNumber in fileSeparators:
+                if oldFileName == newFileName:
+                    fileName = oldFileName
+                elif oldFileName == "__NULL__":
+                    fileName = newFileName
+                else:
+                    fileName = oldFileName
+                item = QTreeWidgetItem(self.filesTree, ["", fileName, ""])
+                item.setData(0, self.__diffFileLineRole, lineNumber)
+            self.__resizeColumnsFiles()
+            self.__resortFiles()
+        else:
+            for oldFileName, newFileName, lineNumber in fileSeparators:
+                for fileName in (oldFileName, newFileName):
+                    if fileName != "__NULL__":
+                        items = self.filesTree.findItems(
+                            fileName, Qt.MatchExactly, 1)
+                        for item in items:
+                            item.setData(0, self.__diffFileLineRole,
+                                         lineNumber)
+        
+        tc = self.diffEdit.textCursor()
+        tc.movePosition(QTextCursor.Start)
+        self.diffEdit.setTextCursor(tc)
+        self.diffEdit.ensureCursorVisible()
+    
+    @pyqtSlot(QTreeWidgetItem, QTreeWidgetItem)
+    def on_filesTree_currentItemChanged(self, current, previous):
+        """
+        Private slot called, when the current item of the files tree changes.
+        
+        @param current reference to the new current item (QTreeWidgetItem)
+        @param previous reference to the old current item (QTreeWidgetItem)
+        """
+        if current:
+            para = current.data(0, self.__diffFileLineRole)
+            if para is not None:
+                if para == 0:
+                    tc = self.diffEdit.textCursor()
+                    tc.movePosition(QTextCursor.Start)
+                    self.diffEdit.setTextCursor(tc)
+                    self.diffEdit.ensureCursorVisible()
+                elif para == -1:
+                    tc = self.diffEdit.textCursor()
+                    tc.movePosition(QTextCursor.End)
+                    self.diffEdit.setTextCursor(tc)
+                    self.diffEdit.ensureCursorVisible()
+                else:
+                    # step 1: move cursor to end
+                    tc = self.diffEdit.textCursor()
+                    tc.movePosition(QTextCursor.End)
+                    self.diffEdit.setTextCursor(tc)
+                    self.diffEdit.ensureCursorVisible()
+                    
+                    # step 2: move cursor to desired line
+                    tc = self.diffEdit.textCursor()
+                    delta = tc.blockNumber() - para
+                    tc.movePosition(QTextCursor.PreviousBlock,
+                                    QTextCursor.MoveAnchor, delta)
+                    self.diffEdit.setTextCursor(tc)
+                    self.diffEdit.ensureCursorVisible()
+    
+    @pyqtSlot(str)
+    def on_diffSelectLabel_linkActivated(self, link):
+        """
+        Private slot to handle the selection of a diff target.
+        
+        @param link activated link
+        @type str
+        """
+        if ":" in link:
+            scheme, parent = link.split(":", 1)
+            if scheme == "diff":
+                try:
+                    parent = int(parent)
+                    self.__generateDiffs(parent)
+                except ValueError:
+                    # ignore silently
+                    pass
+    
+    @pyqtSlot(str)
+    def on_saveLabel_linkActivated(self, link):
+        """
+        Private slot to handle the selection of the save link.
+        
+        @param link activated link
+        @type str
+        """
+        if ":" not in link:
+            return
+        
+        scheme, rest = link.split(":", 1)
+        if scheme != "save" or rest != "me":
+            return
+        
+        if self.projectMode:
+            fname = self.vcs.splitPath(self.__filename)[0]
+            fname += "/{0}.diff".format(os.path.split(fname)[-1])
+        else:
+            dname, fname = self.vcs.splitPath(self.__filename)
+            if fname != '.':
+                fname = "{0}.diff".format(self.__filename)
+            else:
+                fname = dname
+        
+        fname, selectedFilter = E5FileDialog.getSaveFileNameAndFilter(
+            self,
+            self.tr("Save Diff"),
+            fname,
+            self.tr("Patch Files (*.diff)"),
+            None,
+            E5FileDialog.Options(E5FileDialog.DontConfirmOverwrite))
+        
+        if not fname:
+            return  # user aborted
+        
+        ext = QFileInfo(fname).suffix()
+        if not ext:
+            ex = selectedFilter.split("(*")[1].split(")")[0]
+            if ex:
+                fname += ex
+        if QFileInfo(fname).exists():
+            res = E5MessageBox.yesNo(
+                self,
+                self.tr("Save Diff"),
+                self.tr("<p>The patch file <b>{0}</b> already exists."
+                        " Overwrite it?</p>").format(fname),
+                icon=E5MessageBox.Warning)
+            if not res:
+                return
+        fname = Utilities.toNativeSeparators(fname)
+        
+        eol = e5App().getObject("Project").getEolString()
+        try:
+            f = open(fname, "w", encoding="utf-8", newline="")
+            f.write(eol.join(self.diffEdit.toPlainText().splitlines()))
+            f.close()
+        except IOError as why:
+            E5MessageBox.critical(
+                self, self.tr('Save Diff'),
+                self.tr(
+                    '<p>The patch file <b>{0}</b> could not be saved.'
+                    '<br>Reason: {1}</p>')
+                .format(fname, str(why)))
+    
+    @pyqtSlot(str)
+    def on_sbsSelectLabel_linkActivated(self, link):
+        """
+        Private slot to handle selection of a side-by-side link.
+        
+        @param link text of the selected link
+        @type str
+        """
+        if ":" in link:
+            scheme, path = link.split(":", 1)
+            if scheme == "sbsdiff" and "_" in path:
+                rev1, rev2 = path.split("_", 1)
+                self.vcs.hgSbsDiff(self.__filename, revisions=(rev1, rev2))

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