Mercurial Repositories > eric / file comparison
comparison: WebBrowser/History/HistoryTreeModel.py
WebBrowser/History/HistoryTreeModel.py
- branch
- QtWebEngine
- changeset 4734
- ce0b1f024da9
- parent 4631
- 5c1a96925da4
- child 5389
- 9b1c800daff3
equal
deleted
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| 4733:ae291a307ea6 | 4734:ce0b1f024da9 |
|---|---|
| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2009 - 2016 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing the history tree model. | |
| 8 """ | |
| 9 | |
| 10 from __future__ import unicode_literals | |
| 11 | |
| 12 import bisect | |
| 13 | |
| 14 from PyQt5.QtCore import Qt, QModelIndex, QDate, QAbstractProxyModel | |
| 15 | |
| 16 from .HistoryModel import HistoryModel | |
| 17 | |
| 18 import UI.PixmapCache | |
| 19 | |
| 20 | |
| 21 class HistoryTreeModel(QAbstractProxyModel): | |
| 22 """ | |
| 23 Class implementing the history tree model. | |
| 24 """ | |
| 25 def __init__(self, sourceModel, parent=None): | |
| 26 """ | |
| 27 Constructor | |
| 28 | |
| 29 @param sourceModel reference to the source model (QAbstractItemModel) | |
| 30 @param parent reference to the parent object (QObject) | |
| 31 """ | |
| 32 super(HistoryTreeModel, self).__init__(parent) | |
| 33 | |
| 34 self.__sourceRowCache = [] | |
| 35 self.__removingDown = False | |
| 36 | |
| 37 self.setSourceModel(sourceModel) | |
| 38 | |
| 39 def headerData(self, section, orientation, role=Qt.DisplayRole): | |
| 40 """ | |
| 41 Public method to get the header data. | |
| 42 | |
| 43 @param section section number (integer) | |
| 44 @param orientation header orientation (Qt.Orientation) | |
| 45 @param role data role (integer) | |
| 46 @return header data | |
| 47 """ | |
| 48 return self.sourceModel().headerData(section, orientation, role) | |
| 49 | |
| 50 def data(self, index, role=Qt.DisplayRole): | |
| 51 """ | |
| 52 Public method to get data from the model. | |
| 53 | |
| 54 @param index index of history entry to get data for (QModelIndex) | |
| 55 @param role data role (integer) | |
| 56 @return history entry data | |
| 57 """ | |
| 58 if role in [Qt.DisplayRole, Qt.EditRole]: | |
| 59 start = index.internalId() | |
| 60 if start == 0: | |
| 61 offset = self.__sourceDateRow(index.row()) | |
| 62 if index.column() == 0: | |
| 63 idx = self.sourceModel().index(offset, 0) | |
| 64 date = idx.data(HistoryModel.DateRole) | |
| 65 if date == QDate.currentDate(): | |
| 66 return self.tr("Earlier Today") | |
| 67 return date.toString("yyyy-MM-dd") | |
| 68 if index.column() == 1: | |
| 69 return self.tr( | |
| 70 "%n item(s)", "", | |
| 71 self.rowCount(index.sibling(index.row(), 0))) | |
| 72 | |
| 73 elif role == Qt.DecorationRole: | |
| 74 if index.column() == 0 and not index.parent().isValid(): | |
| 75 return UI.PixmapCache.getIcon("history.png") | |
| 76 | |
| 77 elif role == HistoryModel.DateRole: | |
| 78 if index.column() == 0 and index.internalId() == 0: | |
| 79 offset = self.__sourceDateRow(index.row()) | |
| 80 idx = self.sourceModel().index(offset, 0) | |
| 81 return idx.data(HistoryModel.DateRole) | |
| 82 | |
| 83 return QAbstractProxyModel.data(self, index, role) | |
| 84 | |
| 85 def columnCount(self, parent=QModelIndex()): | |
| 86 """ | |
| 87 Public method to get the number of columns. | |
| 88 | |
| 89 @param parent index of parent (QModelIndex) | |
| 90 @return number of columns (integer) | |
| 91 """ | |
| 92 return self.sourceModel().columnCount(self.mapToSource(parent)) | |
| 93 | |
| 94 def rowCount(self, parent=QModelIndex()): | |
| 95 """ | |
| 96 Public method to determine the number of rows. | |
| 97 | |
| 98 @param parent index of parent (QModelIndex) | |
| 99 @return number of rows (integer) | |
| 100 """ | |
| 101 if parent.internalId() != 0 or \ | |
| 102 parent.column() > 0 or \ | |
| 103 self.sourceModel() is None: | |
| 104 return 0 | |
| 105 | |
| 106 # row count OF dates | |
| 107 if not parent.isValid(): | |
| 108 if self.__sourceRowCache: | |
| 109 return len(self.__sourceRowCache) | |
| 110 | |
| 111 currentDate = QDate() | |
| 112 rows = 0 | |
| 113 totalRows = self.sourceModel().rowCount() | |
| 114 | |
| 115 for row in range(totalRows): | |
| 116 rowDate = self.sourceModel().index(row, 0)\ | |
| 117 .data(HistoryModel.DateRole) | |
| 118 if rowDate != currentDate: | |
| 119 self.__sourceRowCache.append(row) | |
| 120 currentDate = rowDate | |
| 121 rows += 1 | |
| 122 return rows | |
| 123 | |
| 124 # row count FOR a date | |
| 125 start = self.__sourceDateRow(parent.row()) | |
| 126 end = self.__sourceDateRow(parent.row() + 1) | |
| 127 return end - start | |
| 128 | |
| 129 def __sourceDateRow(self, row): | |
| 130 """ | |
| 131 Private method to translate the top level date row into the offset | |
| 132 where that date starts. | |
| 133 | |
| 134 @param row row number of the date (integer) | |
| 135 @return offset where that date starts (integer) | |
| 136 """ | |
| 137 if row <= 0: | |
| 138 return 0 | |
| 139 | |
| 140 if len(self.__sourceRowCache) == 0: | |
| 141 self.rowCount(QModelIndex()) | |
| 142 | |
| 143 if row >= len(self.__sourceRowCache): | |
| 144 if self.sourceModel() is None: | |
| 145 return 0 | |
| 146 return self.sourceModel().rowCount() | |
| 147 | |
| 148 return self.__sourceRowCache[row] | |
| 149 | |
| 150 def mapToSource(self, proxyIndex): | |
| 151 """ | |
| 152 Public method to map an index to the source model index. | |
| 153 | |
| 154 @param proxyIndex reference to a proxy model index (QModelIndex) | |
| 155 @return source model index (QModelIndex) | |
| 156 """ | |
| 157 offset = proxyIndex.internalId() | |
| 158 if offset == 0: | |
| 159 return QModelIndex() | |
| 160 startDateRow = self.__sourceDateRow(offset - 1) | |
| 161 return self.sourceModel().index( | |
| 162 startDateRow + proxyIndex.row(), proxyIndex.column()) | |
| 163 | |
| 164 def index(self, row, column, parent=QModelIndex()): | |
| 165 """ | |
| 166 Public method to create an index. | |
| 167 | |
| 168 @param row row number for the index (integer) | |
| 169 @param column column number for the index (integer) | |
| 170 @param parent index of the parent item (QModelIndex) | |
| 171 @return requested index (QModelIndex) | |
| 172 """ | |
| 173 if row < 0 or \ | |
| 174 column < 0 or \ | |
| 175 column >= self.columnCount(parent) or \ | |
| 176 parent.column() > 0: | |
| 177 return QModelIndex() | |
| 178 | |
| 179 if not parent.isValid(): | |
| 180 return self.createIndex(row, column, 0) | |
| 181 return self.createIndex(row, column, parent.row() + 1) | |
| 182 | |
| 183 def parent(self, index): | |
| 184 """ | |
| 185 Public method to get the parent index. | |
| 186 | |
| 187 @param index index of item to get parent (QModelIndex) | |
| 188 @return index of parent (QModelIndex) | |
| 189 """ | |
| 190 offset = index.internalId() | |
| 191 if offset == 0 or not index.isValid(): | |
| 192 return QModelIndex() | |
| 193 return self.createIndex(offset - 1, 0, 0) | |
| 194 | |
| 195 def hasChildren(self, parent=QModelIndex()): | |
| 196 """ | |
| 197 Public method to check, if an entry has some children. | |
| 198 | |
| 199 @param parent index of the entry to check (QModelIndex) | |
| 200 @return flag indicating the presence of children (boolean) | |
| 201 """ | |
| 202 grandparent = parent.parent() | |
| 203 if not grandparent.isValid(): | |
| 204 return True | |
| 205 return False | |
| 206 | |
| 207 def flags(self, index): | |
| 208 """ | |
| 209 Public method to get the item flags. | |
| 210 | |
| 211 @param index index of the item (QModelIndex) | |
| 212 @return flags (Qt.ItemFlags) | |
| 213 """ | |
| 214 if not index.isValid(): | |
| 215 return Qt.ItemFlags(Qt.NoItemFlags) | |
| 216 return Qt.ItemFlags( | |
| 217 Qt.ItemIsSelectable | Qt.ItemIsEnabled | Qt.ItemIsDragEnabled) | |
| 218 | |
| 219 def setSourceModel(self, sourceModel): | |
| 220 """ | |
| 221 Public method to set the source model. | |
| 222 | |
| 223 @param sourceModel reference to the source model (QAbstractItemModel) | |
| 224 """ | |
| 225 if self.sourceModel() is not None: | |
| 226 self.sourceModel().modelReset.disconnect(self.__sourceReset) | |
| 227 self.sourceModel().layoutChanged.disconnect(self.__sourceReset) | |
| 228 self.sourceModel().rowsInserted.disconnect( | |
| 229 self.__sourceRowsInserted) | |
| 230 self.sourceModel().rowsRemoved.disconnect(self.__sourceRowsRemoved) | |
| 231 | |
| 232 super(HistoryTreeModel, self).setSourceModel(sourceModel) | |
| 233 | |
| 234 if self.sourceModel() is not None: | |
| 235 self.__loaded = False | |
| 236 self.sourceModel().modelReset.connect(self.__sourceReset) | |
| 237 self.sourceModel().layoutChanged.connect(self.__sourceReset) | |
| 238 self.sourceModel().rowsInserted.connect(self.__sourceRowsInserted) | |
| 239 self.sourceModel().rowsRemoved.connect(self.__sourceRowsRemoved) | |
| 240 | |
| 241 self.beginResetModel() | |
| 242 self.endResetModel() | |
| 243 | |
| 244 def __sourceReset(self): | |
| 245 """ | |
| 246 Private slot to handle a reset of the source model. | |
| 247 """ | |
| 248 self.beginResetModel() | |
| 249 self.__sourceRowCache = [] | |
| 250 self.endResetModel() | |
| 251 | |
| 252 def __sourceRowsInserted(self, parent, start, end): | |
| 253 """ | |
| 254 Private slot to handle the insertion of data in the source model. | |
| 255 | |
| 256 @param parent reference to the parent index (QModelIndex) | |
| 257 @param start start row (integer) | |
| 258 @param end end row (integer) | |
| 259 """ | |
| 260 if not parent.isValid(): | |
| 261 if start != 0 or start != end: | |
| 262 self.beginResetModel() | |
| 263 self.__sourceRowCache = [] | |
| 264 self.endResetModel() | |
| 265 return | |
| 266 | |
| 267 self.__sourceRowCache = [] | |
| 268 treeIndex = self.mapFromSource(self.sourceModel().index(start, 0)) | |
| 269 treeParent = treeIndex.parent() | |
| 270 if self.rowCount(treeParent) == 1: | |
| 271 self.beginInsertRows(QModelIndex(), 0, 0) | |
| 272 self.endInsertRows() | |
| 273 else: | |
| 274 self.beginInsertRows(treeParent, treeIndex.row(), | |
| 275 treeIndex.row()) | |
| 276 self.endInsertRows() | |
| 277 | |
| 278 def mapFromSource(self, sourceIndex): | |
| 279 """ | |
| 280 Public method to map an index to the proxy model index. | |
| 281 | |
| 282 @param sourceIndex reference to a source model index (QModelIndex) | |
| 283 @return proxy model index (QModelIndex) | |
| 284 """ | |
| 285 if not sourceIndex.isValid(): | |
| 286 return QModelIndex() | |
| 287 | |
| 288 if len(self.__sourceRowCache) == 0: | |
| 289 self.rowCount(QModelIndex()) | |
| 290 | |
| 291 try: | |
| 292 row = self.__sourceRowCache.index(sourceIndex.row()) | |
| 293 except ValueError: | |
| 294 row = bisect.bisect_left(self.__sourceRowCache, sourceIndex.row()) | |
| 295 if row == len(self.__sourceRowCache) or \ | |
| 296 self.__sourceRowCache[row] != sourceIndex.row(): | |
| 297 row -= 1 | |
| 298 dateRow = max(0, row) | |
| 299 row = sourceIndex.row() - self.__sourceRowCache[dateRow] | |
| 300 return self.createIndex(row, sourceIndex.column(), dateRow + 1) | |
| 301 | |
| 302 def removeRows(self, row, count, parent=QModelIndex()): | |
| 303 """ | |
| 304 Public method to remove entries from the model. | |
| 305 | |
| 306 @param row row of the first entry to remove (integer) | |
| 307 @param count number of entries to remove (integer) | |
| 308 @param parent index of the parent entry (QModelIndex) | |
| 309 @return flag indicating successful removal (boolean) | |
| 310 """ | |
| 311 if row < 0 or \ | |
| 312 count <= 0 or \ | |
| 313 row + count > self.rowCount(parent): | |
| 314 return False | |
| 315 | |
| 316 self.__removingDown = True | |
| 317 if parent.isValid() and self.rowCount(parent) == count - row: | |
| 318 self.beginRemoveRows(QModelIndex(), parent.row(), parent.row()) | |
| 319 else: | |
| 320 self.beginRemoveRows(parent, row, row + count - 1) | |
| 321 if parent.isValid(): | |
| 322 # removing pages | |
| 323 offset = self.__sourceDateRow(parent.row()) | |
| 324 return self.sourceModel().removeRows(offset + row, count) | |
| 325 else: | |
| 326 # removing whole dates | |
| 327 for i in range(row + count - 1, row - 1, -1): | |
| 328 dateParent = self.index(i, 0) | |
| 329 offset = self.__sourceDateRow(dateParent.row()) | |
| 330 if not self.sourceModel().removeRows( | |
| 331 offset, self.rowCount(dateParent)): | |
| 332 return False | |
| 333 return True | |
| 334 | |
| 335 def __sourceRowsRemoved(self, parent, start, end): | |
| 336 """ | |
| 337 Private slot to handle the removal of data in the source model. | |
| 338 | |
| 339 @param parent reference to the parent index (QModelIndex) | |
| 340 @param start start row (integer) | |
| 341 @param end end row (integer) | |
| 342 """ | |
| 343 if not self.__removingDown: | |
| 344 self.beginResetModel() | |
| 345 self.__sourceRowCache = [] | |
| 346 self.endResetModel() | |
| 347 return | |
| 348 | |
| 349 if not parent.isValid(): | |
| 350 if self.__sourceRowCache: | |
| 351 i = end | |
| 352 while i >= start: | |
| 353 try: | |
| 354 ind = self.__sourceRowCache.index(i) | |
| 355 except ValueError: | |
| 356 ind = bisect.bisect_left(self.__sourceRowCache, i) | |
| 357 if ind == len(self.__sourceRowCache) or \ | |
| 358 self.__sourceRowCache[ind] != i: | |
| 359 ind -= 1 | |
| 360 row = max(0, ind) | |
| 361 offset = self.__sourceRowCache[row] | |
| 362 dateParent = self.index(row, 0) | |
| 363 # If we can remove all the rows in the date do that | |
| 364 # and skip over them. | |
| 365 rc = self.rowCount(dateParent) | |
| 366 if i - rc + 1 == offset and start <= i - rc + 1: | |
| 367 del self.__sourceRowCache[row] | |
| 368 i -= rc + 1 | |
| 369 else: | |
| 370 row += 1 | |
| 371 i -= 1 | |
| 372 for j in range(row, len(self.__sourceRowCache)): | |
| 373 self.__sourceRowCache[j] -= 1 | |
| 374 | |
| 375 if self.__removingDown: | |
| 376 self.endRemoveRows() | |
| 377 self.__removingDown = False |
