eric6/UI/BrowserModel.py

changeset 6942
2602857055c5
parent 6645
ad476851d7e0
child 7192
a22eee00b052
diff -r f99d60d6b59b -r 2602857055c5 eric6/UI/BrowserModel.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/eric6/UI/BrowserModel.py	Sun Apr 14 15:09:21 2019 +0200
@@ -0,0 +1,1928 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2006 - 2019 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing the browser model.
+"""
+
+from __future__ import unicode_literals
+try:
+    str = unicode
+except NameError:
+    pass
+
+import os
+import sys
+import fnmatch
+import json
+
+from PyQt5.QtCore import QDir, QModelIndex, QAbstractItemModel, \
+    QFileSystemWatcher, Qt, QProcess, QCoreApplication
+from PyQt5.QtGui import QImageReader, QFont
+from PyQt5.QtWidgets import QApplication
+
+import UI.PixmapCache
+import Preferences
+import Utilities
+
+BrowserItemRoot = 0
+BrowserItemDirectory = 1
+BrowserItemSysPath = 2
+BrowserItemFile = 3
+BrowserItemClass = 4
+BrowserItemMethod = 5
+BrowserItemAttributes = 6
+BrowserItemAttribute = 7
+BrowserItemCoding = 8
+BrowserItemImports = 9
+BrowserItemImport = 10
+
+
+class BrowserModel(QAbstractItemModel):
+    """
+    Class implementing the browser model.
+    """
+    def __init__(self, parent=None, nopopulate=False):
+        """
+        Constructor
+        
+        @param parent reference to parent object (QObject)
+        @keyparam nopopulate flag indicating to not populate the model
+            (boolean)
+        """
+        super(BrowserModel, self).__init__(parent)
+        
+        self.progDir = None
+        self.watchedItems = {}
+        self.watcher = QFileSystemWatcher(self)
+        self.watcher.directoryChanged.connect(self.directoryChanged)
+        
+        self.__sysPathInterpreter = ""
+        self.__sysPathItem = None
+        
+        if not nopopulate:
+            rootData = QCoreApplication.translate("BrowserModel", "Name")
+            self.rootItem = BrowserItem(None, rootData)
+            
+            self.__populateModel()
+    
+    def columnCount(self, parent=None):
+        """
+        Public method to get the number of columns.
+        
+        @param parent index of parent item (QModelIndex)
+        @return number of columns (integer)
+        """
+        if parent is None:
+            parent = QModelIndex()
+        
+        if parent.isValid():
+            item = parent.internalPointer()
+        else:
+            item = self.rootItem
+        
+        return item.columnCount() + 1
+    
+    def data(self, index, role):
+        """
+        Public method to get data of an item.
+        
+        @param index index of the data to retrieve (QModelIndex)
+        @param role role of data (Qt.ItemDataRole)
+        @return requested data
+        """
+        if not index.isValid():
+            return None
+        
+        if role == Qt.DisplayRole:
+            item = index.internalPointer()
+            if index.column() < item.columnCount():
+                return item.data(index.column())
+            elif index.column() == item.columnCount() and \
+                    index.column() < self.columnCount(self.parent(index)):
+                # This is for the case where an item under a multi-column
+                # parent doesn't have a value for all the columns
+                return ""
+        elif role == Qt.DecorationRole:
+            if index.column() == 0:
+                return index.internalPointer().getIcon()
+        elif role == Qt.FontRole:
+            item = index.internalPointer()
+            if item.isSymlink():
+                font = QFont(QApplication.font("QTreeView"))
+                font.setItalic(True)
+                return font
+        
+        return None
+    
+    def flags(self, index):
+        """
+        Public method to get the item flags.
+        
+        @param index index of the data to retrieve (QModelIndex)
+        @return requested flags (Qt.ItemFlags)
+        """
+        if not index.isValid():
+            return Qt.ItemIsEnabled
+        
+        return Qt.ItemIsEnabled | Qt.ItemIsSelectable
+    
+    def headerData(self, section, orientation, role=Qt.DisplayRole):
+        """
+        Public method to get the header data.
+        
+        @param section number of section to get data for (integer)
+        @param orientation header orientation (Qt.Orientation)
+        @param role role of data (Qt.ItemDataRole)
+        @return requested header data
+        """
+        if orientation == Qt.Horizontal and role == Qt.DisplayRole:
+            if section >= self.rootItem.columnCount():
+                return ""
+            else:
+                return self.rootItem.data(section)
+        
+        return None
+    
+    def index(self, row, column, parent=None):
+        """
+        Public method to create an index.
+        
+        @param row row number of the new index (integer)
+        @param column column number of the new index (integer)
+        @param parent index of parent item (QModelIndex)
+        @return index object (QModelIndex)
+        """
+        if parent is None:
+            parent = QModelIndex()
+        
+        # The model/view framework considers negative values out-of-bounds,
+        # however in python they work when indexing into lists. So make sure
+        # we return an invalid index for out-of-bounds row/col
+        if row < 0 or column < 0 or \
+           row >= self.rowCount(parent) or column >= self.columnCount(parent):
+            return QModelIndex()
+        
+        if not parent.isValid():
+            parentItem = self.rootItem
+        else:
+            parentItem = parent.internalPointer()
+        
+        try:
+            if not parentItem.isPopulated():
+                self.populateItem(parentItem)
+            childItem = parentItem.child(row)
+        except IndexError:
+            childItem = None
+        if childItem:
+            return self.createIndex(row, column, childItem)
+        else:
+            return QModelIndex()
+    
+    def parent(self, index):
+        """
+        Public method to get the index of the parent object.
+        
+        @param index index of the item (QModelIndex)
+        @return index of parent item (QModelIndex)
+        """
+        if not index.isValid():
+            return QModelIndex()
+        
+        childItem = index.internalPointer()
+        parentItem = childItem.parent()
+        
+        if parentItem == self.rootItem:
+            return QModelIndex()
+        
+        return self.createIndex(parentItem.row(), 0, parentItem)
+    
+    def rowCount(self, parent=None):
+        """
+        Public method to get the number of rows.
+        
+        @param parent index of parent item (QModelIndex)
+        @return number of rows (integer)
+        """
+        if parent is None:
+            parent = QModelIndex()
+        
+        # Only the first column should have children
+        if parent.column() > 0:
+            return 0
+        
+        if not parent.isValid():
+            parentItem = self.rootItem
+        else:
+            parentItem = parent.internalPointer()
+            if not parentItem.isPopulated():    # lazy population
+                self.populateItem(parentItem)
+        
+        return parentItem.childCount()
+
+    def hasChildren(self, parent=None):
+        """
+        Public method to check for the presence of child items.
+        
+        We always return True for normal items in order to do lazy
+        population of the tree.
+        
+        @param parent index of parent item (QModelIndex)
+        @return flag indicating the presence of child items (boolean)
+        """
+        if parent is None:
+            parent = QModelIndex()
+        
+        # Only the first column should have children
+        if parent.column() > 0:
+            return 0
+        
+        if not parent.isValid():
+            return self.rootItem.childCount() > 0
+        
+        if parent.internalPointer().isLazyPopulated():
+            return True
+        else:
+            return parent.internalPointer().childCount() > 0
+
+    def clear(self):
+        """
+        Public method to clear the model.
+        """
+        self.beginResetModel()
+        self.rootItem.removeChildren()
+        self.endResetModel()
+    
+    def item(self, index):
+        """
+        Public method to get a reference to an item.
+        
+        @param index index of the data to retrieve (QModelIndex)
+        @return requested item reference (BrowserItem)
+        """
+        if not index.isValid():
+            return None
+        
+        return index.internalPointer()
+    
+    def _addWatchedItem(self, itm):
+        """
+        Protected method to watch an item.
+        
+        @param itm item to be watched (BrowserDirectoryItem)
+        """
+        if isinstance(itm, BrowserDirectoryItem):
+            dirName = itm.dirName()
+            if dirName != "" and \
+               not dirName.startswith("//") and \
+               not dirName.startswith("\\\\"):
+                if dirName not in self.watcher.directories():
+                    self.watcher.addPath(dirName)
+                if dirName in self.watchedItems:
+                    if itm not in self.watchedItems[dirName]:
+                        self.watchedItems[dirName].append(itm)
+                else:
+                    self.watchedItems[dirName] = [itm]
+    
+    def _removeWatchedItem(self, itm):
+        """
+        Protected method to remove a watched item.
+        
+        @param itm item to be removed (BrowserDirectoryItem)
+        """
+        if isinstance(itm, BrowserDirectoryItem):
+            dirName = itm.dirName()
+            if dirName in self.watchedItems:
+                if itm in self.watchedItems[dirName]:
+                    self.watchedItems[dirName].remove(itm)
+                if len(self.watchedItems[dirName]) == 0:
+                    del self.watchedItems[dirName]
+                    self.watcher.removePath(dirName)
+    
+    def directoryChanged(self, path):
+        """
+        Public slot to handle the directoryChanged signal of the watcher.
+        
+        @param path path of the directory (string)
+        """
+        if path not in self.watchedItems:
+            # just ignore the situation we don't have a reference to the item
+            return
+        
+        if Preferences.getUI("BrowsersListHiddenFiles"):
+            dirFilter = QDir.Filters(
+                QDir.AllEntries | QDir.Hidden | QDir.NoDotAndDotDot)
+        else:
+            dirFilter = QDir.Filters(
+                QDir.AllEntries | QDir.NoDot | QDir.NoDotDot)
+        
+        for itm in self.watchedItems[path]:
+            oldCnt = itm.childCount()
+            
+            qdir = QDir(itm.dirName())
+            
+            entryInfoList = qdir.entryInfoList(dirFilter)
+            
+            # step 1: check for new entries
+            children = itm.children()
+            for f in entryInfoList:
+                fpath = Utilities.toNativeSeparators(f.absoluteFilePath())
+                childFound = False
+                for child in children:
+                    if child.name() == fpath:
+                        childFound = True
+                        children.remove(child)
+                        break
+                if childFound:
+                    continue
+                
+                cnt = itm.childCount()
+                self.beginInsertRows(
+                    self.createIndex(itm.row(), 0, itm), cnt, cnt)
+                if f.isDir():
+                    node = BrowserDirectoryItem(
+                        itm,
+                        Utilities.toNativeSeparators(f.absoluteFilePath()),
+                        False)
+                else:
+                    node = BrowserFileItem(
+                        itm,
+                        Utilities.toNativeSeparators(f.absoluteFilePath()))
+                self._addItem(node, itm)
+                self.endInsertRows()
+            
+            # step 2: check for removed entries
+            if len(entryInfoList) != itm.childCount():
+                for row in range(oldCnt - 1, -1, -1):
+                    child = itm.child(row)
+                    childname = Utilities.fromNativeSeparators(child.name())
+                    entryFound = False
+                    for f in entryInfoList:
+                        if f.absoluteFilePath() == childname:
+                            entryFound = True
+                            entryInfoList.remove(f)
+                            break
+                    if entryFound:
+                        continue
+                    
+                    self._removeWatchedItem(child)
+                    self.beginRemoveRows(
+                        self.createIndex(itm.row(), 0, itm), row, row)
+                    itm.removeChild(child)
+                    self.endRemoveRows()
+    
+    def __populateModel(self):
+        """
+        Private method to populate the browser model.
+        """
+        self.toplevelDirs = []
+        tdp = Preferences.Prefs.settings.value('BrowserModel/ToplevelDirs')
+        if tdp:
+            self.toplevelDirs = tdp
+        else:
+            self.toplevelDirs.append(
+                Utilities.toNativeSeparators(QDir.homePath()))
+            for d in QDir.drives():
+                self.toplevelDirs.append(Utilities.toNativeSeparators(
+                    d.absoluteFilePath()))
+        
+        for d in self.toplevelDirs:
+            itm = BrowserDirectoryItem(self.rootItem, d)
+            self._addItem(itm, self.rootItem)
+    
+    def interpreterChanged(self, interpreter):
+        """
+        Public method to handle a change of the debug client's interpreter.
+        
+        @param interpreter interpreter of the debug client (string)
+        """
+        if interpreter and "python" in interpreter.lower():
+            if interpreter.endswith("w.exe"):
+                interpreter = interpreter.replace("w.exe", ".exe")
+            if self.__sysPathInterpreter != interpreter:
+                self.__sysPathInterpreter = interpreter
+                # step 1: remove sys.path entry
+                if self.__sysPathItem is not None:
+                    self.beginRemoveRows(
+                        QModelIndex(), self.__sysPathItem.row(),
+                        self.__sysPathItem.row())
+                    self.rootItem.removeChild(self.__sysPathItem)
+                    self.endRemoveRows()
+                    self.__sysPathItem = None
+                
+                if self.__sysPathInterpreter:
+                    # step 2: add a new one
+                    self.__sysPathItem = BrowserSysPathItem(self.rootItem)
+                    self.addItem(self.__sysPathItem)
+        else:
+            # remove sys.path entry
+            if self.__sysPathItem is not None:
+                self.beginRemoveRows(
+                    QModelIndex(), self.__sysPathItem.row(),
+                    self.__sysPathItem.row())
+                self.rootItem.removeChild(self.__sysPathItem)
+                self.endRemoveRows()
+                self.__sysPathItem = None
+            self.__sysPathInterpreter = ""
+    
+    def programChange(self, dirname):
+        """
+        Public method to change the entry for the directory of file being
+        debugged.
+        
+        @param dirname name of the directory containing the file (string)
+        """
+        if self.progDir:
+            if dirname == self.progDir.dirName():
+                return
+            
+            # remove old entry
+            self._removeWatchedItem(self.progDir)
+            self.beginRemoveRows(
+                QModelIndex(), self.progDir.row(), self.progDir.row())
+            self.rootItem.removeChild(self.progDir)
+            self.endRemoveRows()
+            self.progDir = None
+        
+        itm = BrowserDirectoryItem(self.rootItem, dirname)
+        self.addItem(itm)
+        self.progDir = itm
+    
+    def addTopLevelDir(self, dirname):
+        """
+        Public method to add a new toplevel directory.
+        
+        @param dirname name of the new toplevel directory (string)
+        """
+        if dirname not in self.toplevelDirs:
+            itm = BrowserDirectoryItem(self.rootItem, dirname)
+            self.addItem(itm)
+            self.toplevelDirs.append(itm.dirName())
+    
+    def removeToplevelDir(self, index):
+        """
+        Public method to remove a toplevel directory.
+        
+        @param index index of the toplevel directory to be removed
+            (QModelIndex)
+        """
+        if not index.isValid():
+            return
+        
+        item = index.internalPointer()
+        self.beginRemoveRows(index.parent(), index.row(), index.row())
+        self.rootItem.removeChild(item)
+        self.endRemoveRows()
+        
+        self.toplevelDirs.remove(item.dirName())
+        self._removeWatchedItem(item)
+    
+    def saveToplevelDirs(self):
+        """
+        Public slot to save the toplevel directories.
+        """
+        Preferences.Prefs.settings.setValue(
+            'BrowserModel/ToplevelDirs', self.toplevelDirs)
+    
+    def _addItem(self, itm, parentItem):
+        """
+        Protected slot to add an item.
+        
+        @param itm reference to item to add (BrowserItem)
+        @param parentItem reference to item to add to (BrowserItem)
+        """
+        parentItem.appendChild(itm)
+    
+    def addItem(self, itm, parent=None):
+        """
+        Public slot to add an item.
+        
+        @param itm item to add (BrowserItem)
+        @param parent index of parent item (QModelIndex)
+        """
+        if parent is None:
+            parent = QModelIndex()
+        
+        if not parent.isValid():
+            parentItem = self.rootItem
+        else:
+            parentItem = parent.internalPointer()
+        
+        cnt = parentItem.childCount()
+        self.beginInsertRows(parent, cnt, cnt)
+        self._addItem(itm, parentItem)
+        self.endInsertRows()
+
+    def populateItem(self, parentItem, repopulate=False):
+        """
+        Public method to populate an item's subtree.
+        
+        @param parentItem reference to the item to be populated
+        @param repopulate flag indicating a repopulation (boolean)
+        """
+        if parentItem.type() == BrowserItemDirectory:
+            self.populateDirectoryItem(parentItem, repopulate)
+        elif parentItem.type() == BrowserItemSysPath:
+            self.populateSysPathItem(parentItem, repopulate)
+        elif parentItem.type() == BrowserItemFile:
+            self.populateFileItem(parentItem, repopulate)
+        elif parentItem.type() == BrowserItemClass:
+            self.populateClassItem(parentItem, repopulate)
+        elif parentItem.type() == BrowserItemMethod:
+            self.populateMethodItem(parentItem, repopulate)
+        elif parentItem.type() == BrowserItemAttributes:
+            self.populateClassAttributesItem(parentItem, repopulate)
+
+    def populateDirectoryItem(self, parentItem, repopulate=False):
+        """
+        Public method to populate a directory item's subtree.
+        
+        @param parentItem reference to the directory item to be populated
+        @param repopulate flag indicating a repopulation (boolean)
+        """
+        self._addWatchedItem(parentItem)
+        
+        qdir = QDir(parentItem.dirName())
+        
+        if Preferences.getUI("BrowsersListHiddenFiles"):
+            dirFilter = QDir.Filters(
+                QDir.AllEntries | QDir.Hidden | QDir.NoDotAndDotDot)
+        else:
+            dirFilter = QDir.Filters(
+                QDir.AllEntries | QDir.NoDot | QDir.NoDotDot)
+        entryInfoList = qdir.entryInfoList(dirFilter)
+        if len(entryInfoList) > 0:
+            if repopulate:
+                self.beginInsertRows(
+                    self.createIndex(parentItem.row(), 0, parentItem),
+                    0, len(entryInfoList) - 1)
+            for f in entryInfoList:
+                if f.isDir():
+                    node = BrowserDirectoryItem(
+                        parentItem,
+                        Utilities.toNativeSeparators(f.absoluteFilePath()),
+                        False)
+                else:
+                    fileFilters = \
+                        Preferences.getUI("BrowsersFileFilters").split(";")
+                    if fileFilters:
+                        fn = f.fileName()
+                        if any(fnmatch.fnmatch(fn, ff.strip())
+                               for ff in fileFilters):
+                            continue
+                    node = BrowserFileItem(
+                        parentItem,
+                        Utilities.toNativeSeparators(f.absoluteFilePath()))
+                self._addItem(node, parentItem)
+            if repopulate:
+                self.endInsertRows()
+
+    def populateSysPathItem(self, parentItem, repopulate=False):
+        """
+        Public method to populate a sys.path item's subtree.
+        
+        @param parentItem reference to the sys.path item to be populated
+        @param repopulate flag indicating a repopulation (boolean)
+        """
+        if self.__sysPathInterpreter:
+            script = "import sys, json; print(json.dumps(sys.path))"
+            proc = QProcess()
+            proc.start(self.__sysPathInterpreter, ["-c", script])
+            finished = proc.waitForFinished(3000)
+            if finished:
+                procOutput = str(proc.readAllStandardOutput(),
+                                 Preferences.getSystem("IOEncoding"),
+                                 'replace')
+                syspath = [p for p in json.loads(procOutput) if p]
+                if len(syspath) > 0:
+                    if repopulate:
+                        self.beginInsertRows(
+                            self.createIndex(parentItem.row(), 0, parentItem),
+                            0, len(syspath) - 1)
+                    for p in syspath:
+                        if os.path.isdir(p):
+                            node = BrowserDirectoryItem(parentItem, p)
+                        else:
+                            node = BrowserFileItem(parentItem, p)
+                        self._addItem(node, parentItem)
+                    if repopulate:
+                        self.endInsertRows()
+            else:
+                proc.kill()
+
+    def populateFileItem(self, parentItem, repopulate=False):
+        """
+        Public method to populate a file item's subtree.
+        
+        @param parentItem reference to the file item to be populated
+        @param repopulate flag indicating a repopulation (boolean)
+        """
+        import Utilities.ClassBrowsers
+        moduleName = parentItem.moduleName()
+        fileName = parentItem.fileName()
+        try:
+            dictionary = Utilities.ClassBrowsers.readmodule(
+                moduleName, [parentItem.dirName()],
+                parentItem.isPython2File() or parentItem.isPython3File())
+        except ImportError:
+            return
+        
+        keys = list(dictionary.keys())
+        if len(keys) > 0:
+            if repopulate:
+                self.beginInsertRows(
+                    self.createIndex(parentItem.row(), 0, parentItem),
+                    0, len(keys) - 1)
+            for key in keys:
+                if key.startswith("@@"):
+                    # special treatment done later
+                    continue
+                cl = dictionary[key]
+                try:
+                    if cl.module == moduleName:
+                        node = BrowserClassItem(parentItem, cl, fileName)
+                        self._addItem(node, parentItem)
+                except AttributeError:
+                    pass
+            if "@@Coding@@" in keys:
+                node = BrowserCodingItem(
+                    parentItem,
+                    QCoreApplication.translate("BrowserModel", "Coding: {0}")
+                    .format(dictionary["@@Coding@@"].coding))
+                self._addItem(node, parentItem)
+            if "@@Globals@@" in keys:
+                node = BrowserGlobalsItem(
+                    parentItem,
+                    dictionary["@@Globals@@"].globals,
+                    QCoreApplication.translate("BrowserModel", "Globals"))
+                self._addItem(node, parentItem)
+            if "@@Import@@" in keys or "@@ImportFrom@@" in keys:
+                node = BrowserImportsItem(
+                    parentItem,
+                    QCoreApplication.translate("BrowserModel", "Imports"))
+                self._addItem(node, parentItem)
+                if "@@Import@@" in keys:
+                    for importedModule in \
+                            dictionary["@@Import@@"].getImports().values():
+                        m_node = BrowserImportItem(
+                            node,
+                            importedModule.importedModuleName,
+                            importedModule.file,
+                            importedModule.linenos)
+                        self._addItem(m_node, node)
+                        for importedName, linenos in \
+                                importedModule.importedNames.items():
+                            mn_node = BrowserImportItem(
+                                m_node,
+                                importedName,
+                                importedModule.file,
+                                linenos,
+                                isModule=False)
+                            self._addItem(mn_node, m_node)
+            if repopulate:
+                self.endInsertRows()
+        parentItem._populated = True
+
+    def populateClassItem(self, parentItem, repopulate=False):
+        """
+        Public method to populate a class item's subtree.
+        
+        @param parentItem reference to the class item to be populated
+        @param repopulate flag indicating a repopulation (boolean)
+        """
+        cl = parentItem.classObject()
+        file_ = parentItem.fileName()
+        
+        if cl is None:
+            return
+        
+        # build sorted list of names
+        keys = []
+        for name in list(cl.classes.keys()):
+            keys.append((name, 'c'))
+        for name in list(cl.methods.keys()):
+            keys.append((name, 'm'))
+        
+        if len(keys) > 0:
+            if repopulate:
+                self.beginInsertRows(
+                    self.createIndex(parentItem.row(), 0, parentItem),
+                    0, len(keys) - 1)
+            for key, kind in keys:
+                if kind == 'c':
+                    node = BrowserClassItem(parentItem, cl.classes[key], file_)
+                elif kind == 'm':
+                    node = BrowserMethodItem(parentItem, cl.methods[key],
+                                             file_)
+                self._addItem(node, parentItem)
+            if repopulate:
+                self.endInsertRows()
+        
+        if len(cl.attributes):
+            node = BrowserClassAttributesItem(
+                parentItem, cl.attributes,
+                QCoreApplication.translate("BrowserModel", "Attributes"))
+            if repopulate:
+                self.addItem(
+                    node, self.createIndex(parentItem.row(), 0, parentItem))
+            else:
+                self._addItem(node, parentItem)
+        
+        if len(cl.globals):
+            node = BrowserClassAttributesItem(
+                parentItem, cl.globals,
+                QCoreApplication.translate("BrowserModel", "Class Attributes"),
+                True)
+            if repopulate:
+                self.addItem(
+                    node, self.createIndex(parentItem.row(), 0, parentItem))
+            else:
+                self._addItem(node, parentItem)
+
+    def populateMethodItem(self, parentItem, repopulate=False):
+        """
+        Public method to populate a method item's subtree.
+        
+        @param parentItem reference to the method item to be populated
+        @param repopulate flag indicating a repopulation (boolean)
+        """
+        fn = parentItem.functionObject()
+        file_ = parentItem.fileName()
+        
+        if fn is None:
+            return
+        
+        # build sorted list of names
+        keys = []
+        for name in list(fn.classes.keys()):
+            keys.append((name, 'c'))
+        for name in list(fn.methods.keys()):
+            keys.append((name, 'm'))
+        
+        if len(keys) > 0:
+            if repopulate:
+                self.beginInsertRows(
+                    self.createIndex(parentItem.row(), 0, parentItem),
+                    0, len(keys) - 1)
+            for key, kind in keys:
+                if kind == 'c':
+                    node = BrowserClassItem(parentItem, fn.classes[key], file_)
+                elif kind == 'm':
+                    node = BrowserMethodItem(parentItem, fn.methods[key],
+                                             file_)
+                self._addItem(node, parentItem)
+            if repopulate:
+                self.endInsertRows()
+
+    def populateClassAttributesItem(self, parentItem, repopulate=False):
+        """
+        Public method to populate a class attributes item's subtree.
+        
+        @param parentItem reference to the class attributes item to be
+            populated
+        @param repopulate flag indicating a repopulation (boolean)
+        """
+        classAttributes = parentItem.isClassAttributes()
+        attributes = parentItem.attributes()
+        if not attributes:
+            return
+        
+        keys = list(attributes.keys())
+        if len(keys) > 0:
+            if repopulate:
+                self.beginInsertRows(
+                    self.createIndex(parentItem.row(), 0, parentItem),
+                    0, len(keys) - 1)
+            for key in keys:
+                node = BrowserClassAttributeItem(parentItem, attributes[key],
+                                                 classAttributes)
+                self._addItem(node, parentItem)
+            if repopulate:
+                self.endInsertRows()
+
+
+class BrowserItem(object):
+    """
+    Class implementing the data structure for browser items.
+    """
+    def __init__(self, parent, data):
+        """
+        Constructor
+        
+        @param parent reference to the parent item
+        @param data single data of the item
+        """
+        self.childItems = []
+        
+        self.parentItem = parent
+        self.itemData = [data]
+        self.type_ = BrowserItemRoot
+        self.icon = UI.PixmapCache.getIcon("empty.png")
+        self._populated = True
+        self._lazyPopulation = False
+        self.symlink = False
+    
+    def appendChild(self, child):
+        """
+        Public method to add a child to this item.
+        
+        @param child reference to the child item to add (BrowserItem)
+        """
+        self.childItems.append(child)
+        self._populated = True
+    
+    def removeChild(self, child):
+        """
+        Public method to remove a child.
+        
+        @param child reference to the child to remove (BrowserItem)
+        """
+        self.childItems.remove(child)
+    
+    def removeChildren(self):
+        """
+        Public method to remove all children.
+        """
+        self.childItems = []
+    
+    def child(self, row):
+        """
+        Public method to get a child id.
+        
+        @param row number of child to get the id of (integer)
+        @return reference to the child item (BrowserItem)
+        """
+        return self.childItems[row]
+    
+    def children(self):
+        """
+        Public method to get the ids of all child items.
+        
+        @return references to all child items (list of BrowserItem)
+        """
+        return self.childItems[:]
+    
+    def childCount(self):
+        """
+        Public method to get the number of available child items.
+        
+        @return number of child items (integer)
+        """
+        return len(self.childItems)
+    
+    def columnCount(self):
+        """
+        Public method to get the number of available data items.
+        
+        @return number of data items (integer)
+        """
+        return len(self.itemData)
+    
+    def data(self, column):
+        """
+        Public method to get a specific data item.
+        
+        @param column number of the requested data item (integer)
+        @return stored data item
+        """
+        try:
+            return self.itemData[column]
+        except IndexError:
+            return ""
+    
+    def parent(self):
+        """
+        Public method to get the reference to the parent item.
+        
+        @return reference to the parent item
+        """
+        return self.parentItem
+    
+    def row(self):
+        """
+        Public method to get the row number of this item.
+        
+        @return row number (integer)
+        """
+        return self.parentItem.childItems.index(self)
+    
+    def type(self):
+        """
+        Public method to get the item type.
+        
+        @return type of the item
+        """
+        return self.type_
+    
+    def isPublic(self):
+        """
+        Public method returning the public visibility status.
+        
+        @return flag indicating public visibility (boolean)
+        """
+        return True
+    
+    def getIcon(self):
+        """
+        Public method to get the items icon.
+        
+        @return the icon (QIcon)
+        """
+        return self.icon
+    
+    def isPopulated(self):
+        """
+        Public method to chek, if this item is populated.
+        
+        @return population status (boolean)
+        """
+        return self._populated
+    
+    def isLazyPopulated(self):
+        """
+        Public method to check, if this item should be populated lazyly.
+        
+        @return lazy population flag (boolean)
+        """
+        return self._lazyPopulation
+    
+    def lessThan(self, other, column, order):
+        """
+        Public method to check, if the item is less than the other one.
+        
+        @param other reference to item to compare against (BrowserItem)
+        @param column column number to use for the comparison (integer)
+        @param order sort order (Qt.SortOrder) (for special sorting)
+        @return true, if this item is less than other (boolean)
+        """
+        try:
+            return self.itemData[column] < other.itemData[column]
+        except IndexError:
+            return False
+    
+    def isSymlink(self):
+        """
+        Public method to check, if the items is a symbolic link.
+        
+        @return flag indicating a symbolic link (boolean)
+        """
+        return self.symlink
+
+
+class BrowserDirectoryItem(BrowserItem):
+    """
+    Class implementing the data structure for browser directory items.
+    """
+    def __init__(self, parent, dinfo, full=True):
+        """
+        Constructor
+        
+        @param parent parent item
+        @param dinfo dinfo is the string for the directory (string)
+        @param full flag indicating full pathname should be displayed (boolean)
+        """
+        self._dirName = os.path.abspath(dinfo)
+        
+        if full:
+            dn = self._dirName
+        else:
+            dn = os.path.basename(self._dirName)
+        
+        BrowserItem.__init__(self, parent, dn)
+        
+        self.type_ = BrowserItemDirectory
+        if not Utilities.isDrive(self._dirName) and \
+           os.path.lexists(self._dirName) and os.path.islink(self._dirName):
+            self.symlink = True
+            self.icon = UI.PixmapCache.getSymlinkIcon("dirClosed.png")
+        else:
+            self.icon = UI.PixmapCache.getIcon("dirClosed.png")
+        self._populated = False
+        self._lazyPopulation = True
+
+    def setName(self, dinfo, full=True):
+        """
+        Public method to set the directory name.
+        
+        @param dinfo dinfo is the string for the directory (string)
+        @param full flag indicating full pathname should be displayed (boolean)
+        """
+        self._dirName = os.path.abspath(dinfo)
+        
+        if full:
+            dn = self._dirName
+        else:
+            dn = os.path.basename(self._dirName)
+        self.itemData[0] = dn
+    
+    def dirName(self):
+        """
+        Public method returning the directory name.
+        
+        @return directory name (string)
+        """
+        return self._dirName
+    
+    def name(self):
+        """
+        Public method to return the name of the item.
+        
+        @return name of the item (string)
+        """
+        return self._dirName
+    
+    def lessThan(self, other, column, order):
+        """
+        Public method to check, if the item is less than the other one.
+        
+        @param other reference to item to compare against (BrowserItem)
+        @param column column number to use for the comparison (integer)
+        @param order sort order (Qt.SortOrder) (for special sorting)
+        @return true, if this item is less than other (boolean)
+        """
+        if issubclass(other.__class__, BrowserFileItem):
+            if Preferences.getUI("BrowsersListFoldersFirst"):
+                return order == Qt.AscendingOrder
+        
+        return BrowserItem.lessThan(self, other, column, order)
+
+
+class BrowserSysPathItem(BrowserItem):
+    """
+    Class implementing the data structure for browser sys.path items.
+    """
+    def __init__(self, parent):
+        """
+        Constructor
+        
+        @param parent parent item
+        """
+        BrowserItem.__init__(self, parent, "sys.path")
+        
+        self.type_ = BrowserItemSysPath
+        self.icon = UI.PixmapCache.getIcon("filePython.png")
+        self._populated = False
+        self._lazyPopulation = True
+    
+    def name(self):
+        """
+        Public method to return the name of the item.
+        
+        @return name of the item (string)
+        """
+        return "sys.path"
+
+
+class BrowserFileItem(BrowserItem):
+    """
+    Class implementing the data structure for browser file items.
+    """
+    def __init__(self, parent, finfo, full=True, sourceLanguage=""):
+        """
+        Constructor
+        
+        @param parent parent item
+        @param finfo the string for the file (string)
+        @param full flag indicating full pathname should be displayed (boolean)
+        @param sourceLanguage source code language of the project (string)
+        """
+        BrowserItem.__init__(self, parent, os.path.basename(finfo))
+        
+        self.type_ = BrowserItemFile
+        self.fileext = os.path.splitext(finfo)[1].lower()
+        self._filename = os.path.abspath(finfo)
+        self._dirName = os.path.dirname(finfo)
+        self.sourceLanguage = sourceLanguage
+        
+        self._moduleName = ''
+        
+        pixName = ""
+        if self.isPython2File():
+            if self.fileext == '.py':
+                pixName = "filePython.png"
+            else:
+                pixName = "filePython2.png"
+            self._populated = False
+            self._lazyPopulation = True
+            self._moduleName = os.path.basename(finfo)
+        elif self.isPython3File():
+            pixName = "filePython.png"
+            self._populated = False
+            self._lazyPopulation = True
+            self._moduleName = os.path.basename(finfo)
+        elif self.isRubyFile():
+            pixName = "fileRuby.png"
+            self._populated = False
+            self._lazyPopulation = True
+            self._moduleName = os.path.basename(finfo)
+        elif self.isDesignerFile():
+            pixName = "fileDesigner.png"
+        elif self.isLinguistFile():
+            if self.fileext == '.ts':
+                pixName = "fileLinguist.png"
+            else:
+                pixName = "fileLinguist2.png"
+        elif self.isResourcesFile():
+            pixName = "fileResource.png"
+        elif self.isProjectFile():
+            pixName = "fileProject.png"
+        elif self.isMultiProjectFile():
+            pixName = "fileMultiProject.png"
+        elif self.isIdlFile():
+            pixName = "fileIDL.png"
+            self._populated = False
+            self._lazyPopulation = True
+            self._moduleName = os.path.basename(finfo)
+        elif self.isProtobufFile():
+            pixName = "protobuf.png"
+            self._populated = False
+            self._lazyPopulation = True
+            self._moduleName = os.path.basename(finfo)
+        elif self.isSvgFile():
+            pixName = "fileSvg.png"
+        elif self.isPixmapFile():
+            pixName = "filePixmap.png"
+        elif self.isDFile():
+            pixName = "fileD.png"
+        elif self.isJavaScriptFile():
+            pixName = "fileJavascript.png"
+            self._populated = False
+            self._lazyPopulation = sys.version_info[0] == 3
+            self._moduleName = os.path.basename(finfo)
+        else:
+            pixName = "fileMisc.png"
+        
+        if os.path.lexists(self._filename) and os.path.islink(self._filename):
+            self.symlink = True
+            self.icon = UI.PixmapCache.getSymlinkIcon(pixName)
+        else:
+            self.icon = UI.PixmapCache.getIcon(pixName)
+    
+    def setName(self, finfo, full=True):
+        """
+        Public method to set the directory name.
+        
+        @param finfo the string for the file (string)
+        @param full flag indicating full pathname should be displayed (boolean)
+        """
+        self._filename = os.path.abspath(finfo)
+        self.itemData[0] = os.path.basename(finfo)
+        if self.isPython2File() or self.isPython3File() or \
+           self.isRubyFile() or self.isIdlFile() or \
+           self.isProtobufFile():
+            self._dirName = os.path.dirname(finfo)
+            self._moduleName = os.path.basename(finfo)
+    
+    def fileName(self):
+        """
+        Public method returning the filename.
+        
+        @return filename (string)
+        """
+        return self._filename
+    
+    def name(self):
+        """
+        Public method to return the name of the item.
+        
+        @return name of the item (string)
+        """
+        return self._filename
+    
+    def fileExt(self):
+        """
+        Public method returning the file extension.
+        
+        @return file extension (string)
+        """
+        return self.fileext
+    
+    def dirName(self):
+        """
+        Public method returning the directory name.
+        
+        @return directory name (string)
+        """
+        return self._dirName
+    
+    def moduleName(self):
+        """
+        Public method returning the module name.
+        
+        @return module name (string)
+        """
+        return self._moduleName
+    
+    def isPython2File(self):
+        """
+        Public method to check, if this file is a Python script.
+        
+        @return flag indicating a Python file (boolean)
+        """
+        return self.fileext in Preferences.getPython("PythonExtensions") or \
+            (self.fileext == "" and
+             self.sourceLanguage in ["Python", "Python2"])
+    
+    def isPython3File(self):
+        """
+        Public method to check, if this file is a Python3 script.
+        
+        @return flag indicating a Python file (boolean)
+        """
+        return self.fileext in Preferences.getPython("Python3Extensions") or \
+            (self.fileext == "" and self.sourceLanguage == "Python3")
+    
+    def isRubyFile(self):
+        """
+        Public method to check, if this file is a Ruby script.
+        
+        @return flag indicating a Ruby file (boolean)
+        """
+        return self.fileext == '.rb' or \
+            (self.fileext == "" and self.sourceLanguage == "Ruby")
+    
+    def isDesignerFile(self):
+        """
+        Public method to check, if this file is a Qt-Designer file.
+        
+        @return flag indicating a Qt-Designer file (boolean)
+        """
+        return self.fileext == '.ui'
+    
+    def isLinguistFile(self):
+        """
+        Public method to check, if this file is a Qt-Linguist file.
+        
+        @return flag indicating a Qt-Linguist file (boolean)
+        """
+        return self.fileext in ['.ts', '.qm']
+    
+    def isResourcesFile(self):
+        """
+        Public method to check, if this file is a Qt-Resources file.
+        
+        @return flag indicating a Qt-Resources file (boolean)
+        """
+        return self.fileext == '.qrc'
+    
+    def isProjectFile(self):
+        """
+        Public method to check, if this file is an eric project file.
+        
+        @return flag indicating an eric project file (boolean)
+        """
+        return self.fileext in ['.e4p']
+    
+    def isMultiProjectFile(self):
+        """
+        Public method to check, if this file is an eric multi project file.
+        
+        @return flag indicating an eric project file (boolean)
+        """
+        return self.fileext in ['.e4m', '.e5m']
+    
+    def isIdlFile(self):
+        """
+        Public method to check, if this file is a CORBA IDL file.
+        
+        @return flag indicating a CORBA IDL file (boolean)
+        """
+        return self.fileext == '.idl'
+    
+    def isProtobufFile(self):
+        """
+        Public method to check, if this file is a Google Protocol Buffer file.
+        
+        @return flag indicating a protobuf file
+        @rtype bool
+        """
+        return self.fileext == ".proto"
+    
+    def isJavaScriptFile(self):
+        """
+        Public method to check, if this file is a JavaScript file.
+        
+        @return flag indicating a JavaScript file (boolean)
+        """
+        return self.fileext == '.js'
+    
+    def isPixmapFile(self):
+        """
+        Public method to check, if this file is a pixmap file.
+        
+        @return flag indicating a pixmap file (boolean)
+        """
+        return self.fileext[1:] in QImageReader.supportedImageFormats()
+    
+    def isSvgFile(self):
+        """
+        Public method to check, if this file is a SVG file.
+        
+        @return flag indicating a SVG file (boolean)
+        """
+        return self.fileext == '.svg'
+    
+    def isDFile(self):
+        """
+        Public method to check, if this file is a D file.
+        
+        @return flag indicating a D file (boolean)
+        """
+        return self.fileext in ['.d', '.di'] or \
+            (self.fileext == "" and self.sourceLanguage == "D")
+    
+    def lessThan(self, other, column, order):
+        """
+        Public method to check, if the item is less than the other one.
+        
+        @param other reference to item to compare against (BrowserItem)
+        @param column column number to use for the comparison (integer)
+        @param order sort order (Qt.SortOrder) (for special sorting)
+        @return true, if this item is less than other (boolean)
+        """
+        if not issubclass(other.__class__, BrowserFileItem):
+            if Preferences.getUI("BrowsersListFoldersFirst"):
+                return order == Qt.DescendingOrder
+        
+        if issubclass(other.__class__, BrowserFileItem):
+            sinit = os.path.basename(self._filename).startswith('__init__.py')
+            oinit = \
+                os.path.basename(other.fileName()).startswith('__init__.py')
+            if sinit and not oinit:
+                return order == Qt.AscendingOrder
+            if not sinit and oinit:
+                return order == Qt.DescendingOrder
+        
+        return BrowserItem.lessThan(self, other, column, order)
+
+
+class BrowserClassItem(BrowserItem):
+    """
+    Class implementing the data structure for browser class items.
+    """
+    def __init__(self, parent, cl, filename):
+        """
+        Constructor
+        
+        @param parent parent item
+        @param cl Class object to be shown
+        @param filename filename of the file defining this class
+        """
+        name = cl.name
+        if hasattr(cl, 'super') and cl.super:
+            supers = []
+            for sup in cl.super:
+                try:
+                    sname = sup.name
+                    if sup.module != cl.module:
+                        sname = "{0}.{1}".format(sup.module, sname)
+                except AttributeError:
+                    sname = sup
+                supers.append(sname)
+            name = name + "({0})".format(", ".join(supers))
+        
+        BrowserItem.__init__(self, parent, name)
+        
+        self.type_ = BrowserItemClass
+        self._name = name
+        self._classObject = cl
+        self._filename = filename
+        
+        import Utilities.ClassBrowsers.ClbrBaseClasses
+        self.isfunction = isinstance(
+            self._classObject,
+            Utilities.ClassBrowsers.ClbrBaseClasses.Function)
+        self.ismodule = isinstance(
+            self._classObject,
+            Utilities.ClassBrowsers.ClbrBaseClasses.Module)
+        self.isenum = isinstance(
+            self._classObject,
+            Utilities.ClassBrowsers.ClbrBaseClasses.Enum)
+        if self.isfunction:
+            if cl.isPrivate():
+                self.icon = UI.PixmapCache.getIcon("method_private.png")
+            elif cl.isProtected():
+                self.icon = UI.PixmapCache.getIcon("method_protected.png")
+            else:
+                self.icon = UI.PixmapCache.getIcon("method.png")
+            self.itemData[0] = "{0}({1})".format(
+                name, ", ".join(self._classObject.parameters))
+            if self._classObject.annotation:
+                self.itemData[0] = "{0} {1}".format(
+                    self.itemData[0], self._classObject.annotation)
+            # if no defaults are wanted
+            # ....format(name,
+            #            ", ".join([e.split('=')[0].strip() \
+            #                       for e in self._classObject.parameters]))
+        elif self.ismodule:
+            self.icon = UI.PixmapCache.getIcon("module.png")
+        elif self.isenum:
+            self.icon = UI.PixmapCache.getIcon("attribute.png")
+        else:
+            if cl.isPrivate():
+                self.icon = UI.PixmapCache.getIcon("class_private.png")
+            elif cl.isProtected():
+                self.icon = UI.PixmapCache.getIcon("class_protected.png")
+            else:
+                self.icon = UI.PixmapCache.getIcon("class.png")
+        if self._classObject and \
+           (self._classObject.methods or
+            self._classObject.classes or
+                self._classObject.attributes):
+            self._populated = False
+            self._lazyPopulation = True
+    
+    def name(self):
+        """
+        Public method to return the name of the item.
+        
+        @return name of the item (string)
+        """
+        return '{0}@@{1}'.format(self._filename, self.lineno())
+    
+    def fileName(self):
+        """
+        Public method returning the filename.
+        
+        @return filename (string)
+        """
+        return self._filename
+    
+    def classObject(self):
+        """
+        Public method returning the class object.
+        
+        @return reference to the class object
+        """
+        return self._classObject
+    
+    def lineno(self):
+        """
+        Public method returning the line number defining this object.
+        
+        @return line number defining the object (integer)
+        """
+        return self._classObject.lineno
+    
+    def boundaries(self):
+        """
+        Public method returning the boundaries of the method definition.
+        
+        @return tuple with start end end line number (integer, integer)
+        """
+        return (self._classObject.lineno, self._classObject.endlineno)
+    
+    def lessThan(self, other, column, order):
+        """
+        Public method to check, if the item is less than the other one.
+        
+        @param other reference to item to compare against (BrowserItem)
+        @param column column number to use for the comparison (integer)
+        @param order sort order (Qt.SortOrder) (for special sorting)
+        @return true, if this item is less than other (boolean)
+        """
+        if issubclass(other.__class__, BrowserCodingItem) or \
+           issubclass(other.__class__, BrowserClassAttributesItem):
+            return order == Qt.DescendingOrder
+        
+        if Preferences.getUI("BrowsersListContentsByOccurrence") and \
+                column == 0:
+            if order == Qt.AscendingOrder:
+                return self.lineno() < other.lineno()
+            else:
+                return self.lineno() > other.lineno()
+        
+        return BrowserItem.lessThan(self, other, column, order)
+    
+    def isPublic(self):
+        """
+        Public method returning the public visibility status.
+        
+        @return flag indicating public visibility (boolean)
+        """
+        return self._classObject.isPublic()
+
+
+class BrowserMethodItem(BrowserItem):
+    """
+    Class implementing the data structure for browser method items.
+    """
+    def __init__(self, parent, fn, filename):
+        """
+        Constructor
+        
+        @param parent parent item
+        @param fn Function object to be shown
+        @param filename filename of the file defining this class (string)
+        """
+        name = fn.name
+        BrowserItem.__init__(self, parent, name)
+        
+        import Utilities.ClassBrowsers.ClbrBaseClasses
+        self.type_ = BrowserItemMethod
+        self._name = name
+        self._functionObject = fn
+        self._filename = filename
+        if self._functionObject.modifier == \
+           Utilities.ClassBrowsers.ClbrBaseClasses.Function.Static:
+            self.icon = UI.PixmapCache.getIcon("method_static.png")
+        elif self._functionObject.modifier == \
+                Utilities.ClassBrowsers.ClbrBaseClasses.Function.Class:
+            self.icon = UI.PixmapCache.getIcon("method_class.png")
+        elif self._functionObject.isPrivate():
+            self.icon = UI.PixmapCache.getIcon("method_private.png")
+        elif self._functionObject.isProtected():
+            self.icon = UI.PixmapCache.getIcon("method_protected.png")
+        else:
+            self.icon = UI.PixmapCache.getIcon("method.png")
+        self.itemData[0] = "{0}({1})".format(
+            name, ", ".join(self._functionObject.parameters))
+        if self._functionObject.annotation:
+            self.itemData[0] = "{0} {1}".format(
+                self.itemData[0], self._functionObject.annotation)
+        # if no defaults are wanted
+        # ....format(name,
+        #            ", ".join([e.split('=')[0].strip()
+        #                       for e in self._functionObject.parameters]))
+        if self._functionObject and \
+           (self._functionObject.methods or self._functionObject.classes):
+            self._populated = False
+            self._lazyPopulation = True
+    
+    def name(self):
+        """
+        Public method to return the name of the item.
+        
+        @return name of the item (string)
+        """
+        return '{0}@@{1}'.format(self._filename, self.lineno())
+    
+    def fileName(self):
+        """
+        Public method returning the filename.
+        
+        @return filename (string)
+        """
+        return self._filename
+    
+    def functionObject(self):
+        """
+        Public method returning the function object.
+        
+        @return reference to the function object
+        """
+        return self._functionObject
+    
+    def lineno(self):
+        """
+        Public method returning the line number defining this object.
+        
+        @return line number defining the object (integer)
+        """
+        return self._functionObject.lineno
+    
+    def boundaries(self):
+        """
+        Public method returning the boundaries of the method definition.
+        
+        @return tuple with start end end line number (integer, integer)
+        """
+        return (self._functionObject.lineno, self._functionObject.endlineno)
+    
+    def lessThan(self, other, column, order):
+        """
+        Public method to check, if the item is less than the other one.
+        
+        @param other reference to item to compare against (BrowserItem)
+        @param column column number to use for the comparison (integer)
+        @param order sort order (Qt.SortOrder) (for special sorting)
+        @return true, if this item is less than other (boolean)
+        """
+        if issubclass(other.__class__, BrowserMethodItem):
+            if self._name.startswith('__init__'):
+                return order == Qt.AscendingOrder
+            if other._name.startswith('__init__'):
+                return order == Qt.DescendingOrder
+        elif issubclass(other.__class__, BrowserClassAttributesItem):
+            return order == Qt.DescendingOrder
+        
+        if Preferences.getUI("BrowsersListContentsByOccurrence") and \
+                column == 0:
+            if order == Qt.AscendingOrder:
+                return self.lineno() < other.lineno()
+            else:
+                return self.lineno() > other.lineno()
+        
+        return BrowserItem.lessThan(self, other, column, order)
+    
+    def isPublic(self):
+        """
+        Public method returning the public visibility status.
+        
+        @return flag indicating public visibility (boolean)
+        """
+        return self._functionObject.isPublic()
+
+
+class BrowserClassAttributesItem(BrowserItem):
+    """
+    Class implementing the data structure for browser class attributes items.
+    """
+    def __init__(self, parent, attributes, text, isClass=False):
+        """
+        Constructor
+        
+        @param parent parent item
+        @param attributes list of attributes
+        @param text text to be shown by this item (string)
+        @param isClass flag indicating class attributes (boolean)
+        """
+        BrowserItem.__init__(self, parent, text)
+        
+        self.type_ = BrowserItemAttributes
+        self._attributes = attributes.copy()
+        self._populated = False
+        self._lazyPopulation = True
+        if isClass:
+            self.icon = UI.PixmapCache.getIcon("attributes_class.png")
+        else:
+            self.icon = UI.PixmapCache.getIcon("attributes.png")
+        self.__isClass = isClass
+    
+    def name(self):
+        """
+        Public method to return the name of the item.
+        
+        @return name of the item (string)
+        """
+        return '{0}@@{1}'.format(self.parentItem.name(), self.data(0))
+    
+    def attributes(self):
+        """
+        Public method returning the attribute list.
+        
+        @return reference to the list of attributes
+        """
+        return self._attributes
+    
+    def isClassAttributes(self):
+        """
+        Public method returning the attributes type.
+        
+        @return flag indicating class attributes (boolean)
+        """
+        return self.__isClass
+    
+    def lessThan(self, other, column, order):
+        """
+        Public method to check, if the item is less than the other one.
+        
+        @param other reference to item to compare against (BrowserItem)
+        @param column column number to use for the comparison (integer)
+        @param order sort order (Qt.SortOrder) (for special sorting)
+        @return true, if this item is less than other (boolean)
+        """
+        if issubclass(other.__class__, BrowserCodingItem):
+            return order == Qt.DescendingOrder
+        elif issubclass(other.__class__, BrowserClassItem) or \
+                issubclass(other.__class__, BrowserMethodItem):
+            return order == Qt.AscendingOrder
+        
+        return BrowserItem.lessThan(self, other, column, order)
+
+
+class BrowserClassAttributeItem(BrowserItem):
+    """
+    Class implementing the data structure for browser class attribute items.
+    """
+    def __init__(self, parent, attribute, isClass=False):
+        """
+        Constructor
+        
+        @param parent parent item
+        @param attribute reference to the attribute object
+        @param isClass flag indicating a class attribute (boolean)
+        """
+        BrowserItem.__init__(self, parent, attribute.name)
+        
+        self.type_ = BrowserItemAttribute
+        self._attributeObject = attribute
+        self.__public = attribute.isPublic()
+        if isClass:
+            self.icon = UI.PixmapCache.getIcon("attribute_class.png")
+        elif attribute.isPrivate():
+            self.icon = UI.PixmapCache.getIcon("attribute_private.png")
+        elif attribute.isProtected():
+            self.icon = UI.PixmapCache.getIcon("attribute_protected.png")
+        else:
+            self.icon = UI.PixmapCache.getIcon("attribute.png")
+    
+    def isPublic(self):
+        """
+        Public method returning the public visibility status.
+        
+        @return flag indicating public visibility (boolean)
+        """
+        return self.__public
+    
+    def attributeObject(self):
+        """
+        Public method returning the class object.
+        
+        @return reference to the class object
+        """
+        return self._attributeObject
+    
+    def fileName(self):
+        """
+        Public method returning the filename.
+        
+        @return filename (string)
+        """
+        return self._attributeObject.file
+    
+    def lineno(self):
+        """
+        Public method returning the line number defining this object.
+        
+        @return line number defining the object (integer)
+        """
+        return self._attributeObject.lineno
+    
+    def linenos(self):
+        """
+        Public method returning the line numbers this object is assigned to.
+        
+        @return line number the object is assigned to (list of integers)
+        """
+        return self._attributeObject.linenos[:]
+    
+    def lessThan(self, other, column, order):
+        """
+        Public method to check, if the item is less than the other one.
+        
+        @param other reference to item to compare against (BrowserItem)
+        @param column column number to use for the comparison (integer)
+        @param order sort order (Qt.SortOrder) (for special sorting)
+        @return true, if this item is less than other (boolean)
+        """
+        if Preferences.getUI("BrowsersListContentsByOccurrence") and \
+                column == 0:
+            if order == Qt.AscendingOrder:
+                return self.lineno() < other.lineno()
+            else:
+                return self.lineno() > other.lineno()
+        
+        return BrowserItem.lessThan(self, other, column, order)
+
+
+class BrowserGlobalsItem(BrowserClassAttributesItem):
+    """
+    Class implementing the data structure for browser globals items.
+    """
+    def __init__(self, parent, attributes, text):
+        """
+        Constructor
+        
+        @param parent parent item
+        @param attributes list of attributes
+        @param text text to be shown by this item (string)
+        """
+        BrowserClassAttributesItem.__init__(self, parent, attributes, text)
+
+
+class BrowserCodingItem(BrowserItem):
+    """
+    Class implementing the data structure for browser coding items.
+    """
+    def __init__(self, parent, text):
+        """
+        Constructor
+        
+        @param parent parent item
+        @param text text to be shown by this item (string)
+        """
+        BrowserItem.__init__(self, parent, text)
+        
+        self.type_ = BrowserItemCoding
+        self.icon = UI.PixmapCache.getIcon("textencoding.png")
+    
+    def lessThan(self, other, column, order):
+        """
+        Public method to check, if the item is less than the other one.
+        
+        @param other reference to item to compare against (BrowserItem)
+        @param column column number to use for the comparison (integer)
+        @param order sort order (Qt.SortOrder) (for special sorting)
+        @return true, if this item is less than other (boolean)
+        """
+        if issubclass(other.__class__, BrowserClassItem) or \
+           issubclass(other.__class__, BrowserClassAttributesItem) or \
+           issubclass(other.__class__, BrowserImportItem):
+            return order == Qt.AscendingOrder
+        
+        return BrowserItem.lessThan(self, other, column, order)
+
+
+class BrowserImportsItem(BrowserItem):
+    """
+    Class implementing the data structure for browser import items.
+    """
+    def __init__(self, parent, text):
+        """
+        Constructor
+        
+        @param parent parent item
+        @param text text to be shown by this item (string)
+        """
+        BrowserItem.__init__(self, parent, text)
+        
+        self.type_ = BrowserItemImports
+        self.icon = UI.PixmapCache.getIcon("imports.png")
+    
+    def lessThan(self, other, column, order):
+        """
+        Public method to check, if the item is less than the other one.
+        
+        @param other reference to item to compare against (BrowserItem)
+        @param column column number to use for the comparison (integer)
+        @param order sort order (Qt.SortOrder) (for special sorting)
+        @return true, if this item is less than other (boolean)
+        """
+        if issubclass(other.__class__, BrowserClassItem) or \
+           issubclass(other.__class__, BrowserClassAttributesItem):
+            return order == Qt.AscendingOrder
+        
+        return BrowserItem.lessThan(self, other, column, order)
+
+
+class BrowserImportItem(BrowserItem):
+    """
+    Class implementing the data structure for browser imported module and
+    imported names items.
+    """
+    def __init__(self, parent, text, filename, lineNumbers, isModule=True):
+        """
+        Constructor
+        
+        @param parent parent item
+        @param text text to be shown by this item (string)
+        @param filename name of the file (string)
+        @param lineNumbers list of line numbers of the import statement
+            (list of integer)
+        @param isModule flag indicating a module item entry (boolean)
+        """
+        BrowserItem.__init__(self, parent, text)
+        
+        self.__filename = filename
+        self.__linenos = lineNumbers[:]
+        
+        self.type_ = BrowserItemImport
+        if isModule:
+            self.icon = UI.PixmapCache.getIcon("importedModule.png")
+        else:
+            self.icon = UI.PixmapCache.getIcon("importedName.png")
+    
+    def fileName(self):
+        """
+        Public method returning the filename.
+        
+        @return filename (string)
+        """
+        return self.__filename
+    
+    def lineno(self):
+        """
+        Public method returning the line number of the first import.
+        
+        @return line number of the first import (integer)
+        """
+        return self.__linenos[0]
+    
+    def linenos(self):
+        """
+        Public method returning the line numbers of all imports.
+        
+        @return line numbers of all imports (list of integers)
+        """
+        return self.__linenos[:]
+    
+    def lessThan(self, other, column, order):
+        """
+        Public method to check, if the item is less than the other one.
+        
+        @param other reference to item to compare against (BrowserItem)
+        @param column column number to use for the comparison (integer)
+        @param order sort order (Qt.SortOrder) (for special sorting)
+        @return true, if this item is less than other (boolean)
+        """
+        if Preferences.getUI("BrowsersListContentsByOccurrence") and \
+                column == 0:
+            if order == Qt.AscendingOrder:
+                return self.lineno() < other.lineno()
+            else:
+                return self.lineno() > other.lineno()
+        
+        return BrowserItem.lessThan(self, other, column, order)

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