Mercurial Repositories > eric / file comparison
comparison: Helpviewer/OfflineStorage/WebDatabasesModel.py
Helpviewer/OfflineStorage/WebDatabasesModel.py
- changeset 353
- c548890dff9b
- child 791
- 9ec2ac20e54e
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| 351:049fc2fc04ac | 353:c548890dff9b |
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| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2010 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing the web databases model. | |
| 8 """ | |
| 9 | |
| 10 import sys | |
| 11 | |
| 12 from PyQt4.QtCore import QAbstractItemModel, QModelIndex, Qt | |
| 13 from PyQt4.QtWebKit import QWebSecurityOrigin, QWebDatabase | |
| 14 | |
| 15 class WebDatabasesModel(QAbstractItemModel): | |
| 16 """ | |
| 17 Class implementing the web databases model. | |
| 18 """ | |
| 19 def __init__(self, parent = None): | |
| 20 """ | |
| 21 Constructor | |
| 22 | |
| 23 @param parent reference to the parent object (QObject) | |
| 24 """ | |
| 25 QAbstractItemModel.__init__(self, parent) | |
| 26 self.__headers = [ | |
| 27 self.trUtf8("Name"), | |
| 28 self.trUtf8("Size") | |
| 29 ] | |
| 30 | |
| 31 self.__data = [] | |
| 32 for origin in QWebSecurityOrigin.allOrigins(): | |
| 33 self.__data.append([origin, origin.databases()]) | |
| 34 | |
| 35 def removeRows(self, row, count, parent = QModelIndex()): | |
| 36 """ | |
| 37 Public method to remove databases from the model. | |
| 38 | |
| 39 @param row row of the first database to remove (integer) | |
| 40 @param count number of databases to remove (integer) | |
| 41 @param parent index of the security origin (QModelIndex) | |
| 42 @return flag indicating successful removal (boolean) | |
| 43 """ | |
| 44 if row < 0 or count <= 0 or row + count > self.rowCount(parent): | |
| 45 return False | |
| 46 | |
| 47 if parent.isValid(): | |
| 48 self.beginRemoveRows(parent, row, row + count - 1) | |
| 49 parentRow = parent.row() | |
| 50 for db in self.__data[parentRow][1][row:row + count]: | |
| 51 QWebDatabase.removeDatabase(db) | |
| 52 del self.__data[parentRow][1][row:row + count] | |
| 53 self.endRemoveRows() | |
| 54 else: | |
| 55 for parentRow in range(row, row + count): | |
| 56 self.beginRemoveRows(self.index(parentRow, 0, parent), | |
| 57 0, len(self.__data[parentRow][1]) - 1) | |
| 58 for db in self.__data[parentRow][1]: | |
| 59 QWebDatabase.removeDatabase(db) | |
| 60 del self.__data[parentRow][1][:] | |
| 61 self.endRemoveRows() | |
| 62 | |
| 63 return True | |
| 64 | |
| 65 def headerData(self, section, orientation, role = Qt.DisplayRole): | |
| 66 """ | |
| 67 Public method to get the header data. | |
| 68 | |
| 69 @param section section number (integer) | |
| 70 @param orientation header orientation (Qt.Orientation) | |
| 71 @param role data role (integer) | |
| 72 @return header data | |
| 73 """ | |
| 74 if orientation == Qt.Horizontal and role == Qt.DisplayRole: | |
| 75 try: | |
| 76 return self.__headers[section] | |
| 77 except IndexError: | |
| 78 pass | |
| 79 return QAbstractItemModel.headerData(self, section, orientation, role) | |
| 80 | |
| 81 def data(self, index, role = Qt.DisplayRole): | |
| 82 """ | |
| 83 Public method to get data from the model. | |
| 84 | |
| 85 @param index index of entry to get data for (QModelIndex) | |
| 86 @param role data role (integer) | |
| 87 @return entry data | |
| 88 """ | |
| 89 if not index.isValid() or index.model() != self: | |
| 90 return None | |
| 91 | |
| 92 if role == Qt.DisplayRole: | |
| 93 parent = index.parent() | |
| 94 if not parent.isValid(): | |
| 95 # security origin | |
| 96 origin = self.__data[index.row()][0] | |
| 97 if index.column() == 0: | |
| 98 if origin.host() == "": | |
| 99 return self.trUtf8("Local") | |
| 100 elif origin.port() == 0: | |
| 101 return "{0}://{1}".format( | |
| 102 origin.scheme(), | |
| 103 origin.host(), | |
| 104 ) | |
| 105 else: | |
| 106 return "{0}://{1}:{2}".format( | |
| 107 origin.scheme(), | |
| 108 origin.host(), | |
| 109 origin.port(), | |
| 110 ) | |
| 111 elif index.column() == 1: | |
| 112 return self.__dataString(origin.databaseUsage()) | |
| 113 else: | |
| 114 # web database | |
| 115 db = self.__data[parent.row()][1][index.row()] | |
| 116 if index.column() == 0: | |
| 117 return self.trUtf8("{0} ({1})").format(db.displayName(), db.name()) | |
| 118 elif index.column() == 1: | |
| 119 return self.__dataString(db.size()) | |
| 120 | |
| 121 def columnCount(self, parent = QModelIndex()): | |
| 122 """ | |
| 123 Public method to get the number of columns. | |
| 124 | |
| 125 @param parent index of parent (QModelIndex) | |
| 126 @return number of columns (integer) | |
| 127 """ | |
| 128 if parent.column() > 0: | |
| 129 return 0 | |
| 130 else: | |
| 131 return len(self.__headers) | |
| 132 | |
| 133 def rowCount(self, parent = QModelIndex()): | |
| 134 """ | |
| 135 Public method to determine the number of rows. | |
| 136 | |
| 137 @param parent index of parent (QModelIndex) | |
| 138 @return number of rows (integer) | |
| 139 """ | |
| 140 if parent.column() > 0: | |
| 141 return 0 | |
| 142 | |
| 143 if not parent.isValid(): | |
| 144 return len(self.__data) | |
| 145 else: | |
| 146 return len(self.__data[parent.row()][1]) | |
| 147 | |
| 148 def index(self, row, column, parent = QModelIndex()): | |
| 149 """ | |
| 150 Public method to get a model index for an entry. | |
| 151 | |
| 152 @param row row number (integer) | |
| 153 @param column column number (integer) | |
| 154 @param parent index of the parent (QModelIndex) | |
| 155 @return index (QModelIndex) | |
| 156 """ | |
| 157 if row < 0 or column < 0 or \ | |
| 158 row >= self.rowCount(parent) or column >= self.columnCount(parent): | |
| 159 return QModelIndex() | |
| 160 | |
| 161 if parent.isValid(): | |
| 162 return self.createIndex(row, column, parent.row()) | |
| 163 else: | |
| 164 return self.createIndex(row, column, sys.maxsize) | |
| 165 | |
| 166 def parent(self, index = QModelIndex()): | |
| 167 """ | |
| 168 Public method to get the index of the parent entry. | |
| 169 | |
| 170 @param index index of the child entry (QModelIndex) | |
| 171 @return index of the parent entry (QModelIndex) | |
| 172 """ | |
| 173 if not index.isValid(): | |
| 174 return QModelIndex() | |
| 175 | |
| 176 if index.internalId() == sys.maxsize: | |
| 177 return QModelIndex() | |
| 178 | |
| 179 return self.createIndex(index.internalId(), 0) | |
| 180 | |
| 181 def hasChildren(self, parent = QModelIndex()): | |
| 182 """ | |
| 183 Public method to check, if a parent node has some children. | |
| 184 | |
| 185 @param parent index of the parent node (QModelIndex) | |
| 186 @return flag indicating the presence of children (boolean) | |
| 187 """ | |
| 188 if not parent.isValid(): | |
| 189 return True | |
| 190 | |
| 191 if parent.internalId() == sys.maxsize: | |
| 192 return True | |
| 193 | |
| 194 return False | |
| 195 | |
| 196 def __dataString(self, size): | |
| 197 """ | |
| 198 Private method to generate a formatted data string. | |
| 199 | |
| 200 @param size size to be formatted (integer) | |
| 201 @return formatted data string (string) | |
| 202 """ | |
| 203 unit = "" | |
| 204 if size < 1024: | |
| 205 unit = self.trUtf8("bytes") | |
| 206 elif size < 1024 * 1024: | |
| 207 size /= 1024 | |
| 208 unit = self.trUtf8("kB") | |
| 209 else: | |
| 210 size /= 1024 * 1024 | |
| 211 unit = self.trUtf8("MB") | |
| 212 return "{0:.1f} {1}".format(size, unit) |
