Mercurial Repositories > eric / file comparison
comparison: eric7/WebBrowser/History/HistoryTreeModel.py
eric7/WebBrowser/History/HistoryTreeModel.py
- branch
- eric7
- changeset 8312
- 800c432b34c8
- parent 8227
- 349308e84eeb
- child 8318
- 962bce857696
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| 8311:4e8b98454baa | 8312:800c432b34c8 |
|---|---|
| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2009 - 2021 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing the history tree model. | |
| 8 """ | |
| 9 | |
| 10 import bisect | |
| 11 | |
| 12 from PyQt5.QtCore import Qt, QModelIndex, QDate, QAbstractProxyModel | |
| 13 | |
| 14 from .HistoryModel import HistoryModel | |
| 15 | |
| 16 import UI.PixmapCache | |
| 17 | |
| 18 | |
| 19 class HistoryTreeModel(QAbstractProxyModel): | |
| 20 """ | |
| 21 Class implementing the history tree model. | |
| 22 """ | |
| 23 def __init__(self, sourceModel, parent=None): | |
| 24 """ | |
| 25 Constructor | |
| 26 | |
| 27 @param sourceModel reference to the source model (QAbstractItemModel) | |
| 28 @param parent reference to the parent object (QObject) | |
| 29 """ | |
| 30 super().__init__(parent) | |
| 31 | |
| 32 self.__sourceRowCache = [] | |
| 33 self.__removingDown = False | |
| 34 | |
| 35 self.setSourceModel(sourceModel) | |
| 36 | |
| 37 def headerData(self, section, orientation, | |
| 38 role=Qt.ItemDataRole.DisplayRole): | |
| 39 """ | |
| 40 Public method to get the header data. | |
| 41 | |
| 42 @param section section number (integer) | |
| 43 @param orientation header orientation (Qt.Orientation) | |
| 44 @param role data role (Qt.ItemDataRole) | |
| 45 @return header data | |
| 46 """ | |
| 47 return self.sourceModel().headerData(section, orientation, role) | |
| 48 | |
| 49 def data(self, index, role=Qt.ItemDataRole.DisplayRole): | |
| 50 """ | |
| 51 Public method to get data from the model. | |
| 52 | |
| 53 @param index index of history entry to get data for (QModelIndex) | |
| 54 @param role data role (integer) | |
| 55 @return history entry data | |
| 56 """ | |
| 57 if role in [Qt.ItemDataRole.DisplayRole, Qt.ItemDataRole.EditRole]: | |
| 58 start = index.internalId() | |
| 59 if start == 0: | |
| 60 offset = self.__sourceDateRow(index.row()) | |
| 61 if index.column() == 0: | |
| 62 idx = self.sourceModel().index(offset, 0) | |
| 63 date = idx.data(HistoryModel.DateRole) | |
| 64 if date == QDate.currentDate(): | |
| 65 return self.tr("Earlier Today") | |
| 66 return date.toString("yyyy-MM-dd") | |
| 67 if index.column() == 1: | |
| 68 return self.tr( | |
| 69 "%n item(s)", "", | |
| 70 self.rowCount(index.sibling(index.row(), 0))) | |
| 71 | |
| 72 elif ( | |
| 73 role == Qt.ItemDataRole.DecorationRole and | |
| 74 index.column() == 0 and | |
| 75 not index.parent().isValid() | |
| 76 ): | |
| 77 return UI.PixmapCache.getIcon("history") | |
| 78 | |
| 79 elif ( | |
| 80 role == HistoryModel.DateRole and | |
| 81 index.column() == 0 and | |
| 82 index.internalId() == 0 | |
| 83 ): | |
| 84 offset = self.__sourceDateRow(index.row()) | |
| 85 idx = self.sourceModel().index(offset, 0) | |
| 86 return idx.data(HistoryModel.DateRole) | |
| 87 | |
| 88 return QAbstractProxyModel.data(self, index, role) | |
| 89 | |
| 90 def columnCount(self, parent=None): | |
| 91 """ | |
| 92 Public method to get the number of columns. | |
| 93 | |
| 94 @param parent index of parent (QModelIndex) | |
| 95 @return number of columns (integer) | |
| 96 """ | |
| 97 if parent is None: | |
| 98 parent = QModelIndex() | |
| 99 | |
| 100 return self.sourceModel().columnCount(self.mapToSource(parent)) | |
| 101 | |
| 102 def rowCount(self, parent=None): | |
| 103 """ | |
| 104 Public method to determine the number of rows. | |
| 105 | |
| 106 @param parent index of parent (QModelIndex) | |
| 107 @return number of rows (integer) | |
| 108 """ | |
| 109 if parent is None: | |
| 110 parent = QModelIndex() | |
| 111 | |
| 112 if ( | |
| 113 parent.internalId() != 0 or | |
| 114 parent.column() > 0 or | |
| 115 self.sourceModel() is None | |
| 116 ): | |
| 117 return 0 | |
| 118 | |
| 119 # row count OF dates | |
| 120 if not parent.isValid(): | |
| 121 if self.__sourceRowCache: | |
| 122 return len(self.__sourceRowCache) | |
| 123 | |
| 124 currentDate = QDate() | |
| 125 rows = 0 | |
| 126 totalRows = self.sourceModel().rowCount() | |
| 127 | |
| 128 for row in range(totalRows): | |
| 129 rowDate = self.sourceModel().index(row, 0).data( | |
| 130 HistoryModel.DateRole) | |
| 131 if rowDate != currentDate: | |
| 132 self.__sourceRowCache.append(row) | |
| 133 currentDate = rowDate | |
| 134 rows += 1 | |
| 135 return rows | |
| 136 | |
| 137 # row count FOR a date | |
| 138 start = self.__sourceDateRow(parent.row()) | |
| 139 end = self.__sourceDateRow(parent.row() + 1) | |
| 140 return end - start | |
| 141 | |
| 142 def __sourceDateRow(self, row): | |
| 143 """ | |
| 144 Private method to translate the top level date row into the offset | |
| 145 where that date starts. | |
| 146 | |
| 147 @param row row number of the date (integer) | |
| 148 @return offset where that date starts (integer) | |
| 149 """ | |
| 150 if row <= 0: | |
| 151 return 0 | |
| 152 | |
| 153 if len(self.__sourceRowCache) == 0: | |
| 154 self.rowCount(QModelIndex()) | |
| 155 | |
| 156 if row >= len(self.__sourceRowCache): | |
| 157 if self.sourceModel() is None: | |
| 158 return 0 | |
| 159 return self.sourceModel().rowCount() | |
| 160 | |
| 161 return self.__sourceRowCache[row] | |
| 162 | |
| 163 def mapToSource(self, proxyIndex): | |
| 164 """ | |
| 165 Public method to map an index to the source model index. | |
| 166 | |
| 167 @param proxyIndex reference to a proxy model index (QModelIndex) | |
| 168 @return source model index (QModelIndex) | |
| 169 """ | |
| 170 offset = proxyIndex.internalId() | |
| 171 if offset == 0: | |
| 172 return QModelIndex() | |
| 173 startDateRow = self.__sourceDateRow(offset - 1) | |
| 174 return self.sourceModel().index( | |
| 175 startDateRow + proxyIndex.row(), proxyIndex.column()) | |
| 176 | |
| 177 def index(self, row, column, parent=None): | |
| 178 """ | |
| 179 Public method to create an index. | |
| 180 | |
| 181 @param row row number for the index (integer) | |
| 182 @param column column number for the index (integer) | |
| 183 @param parent index of the parent item (QModelIndex) | |
| 184 @return requested index (QModelIndex) | |
| 185 """ | |
| 186 if parent is None: | |
| 187 parent = QModelIndex() | |
| 188 | |
| 189 if ( | |
| 190 row < 0 or | |
| 191 column < 0 or | |
| 192 column >= self.columnCount(parent) or | |
| 193 parent.column() > 0 | |
| 194 ): | |
| 195 return QModelIndex() | |
| 196 | |
| 197 if not parent.isValid(): | |
| 198 return self.createIndex(row, column, 0) | |
| 199 return self.createIndex(row, column, parent.row() + 1) | |
| 200 | |
| 201 def parent(self, index): | |
| 202 """ | |
| 203 Public method to get the parent index. | |
| 204 | |
| 205 @param index index of item to get parent (QModelIndex) | |
| 206 @return index of parent (QModelIndex) | |
| 207 """ | |
| 208 offset = index.internalId() | |
| 209 if offset == 0 or not index.isValid(): | |
| 210 return QModelIndex() | |
| 211 return self.createIndex(offset - 1, 0, 0) | |
| 212 | |
| 213 def hasChildren(self, parent=None): | |
| 214 """ | |
| 215 Public method to check, if an entry has some children. | |
| 216 | |
| 217 @param parent index of the entry to check (QModelIndex) | |
| 218 @return flag indicating the presence of children (boolean) | |
| 219 """ | |
| 220 if parent is None: | |
| 221 parent = QModelIndex() | |
| 222 | |
| 223 grandparent = parent.parent() | |
| 224 if not grandparent.isValid(): | |
| 225 return True | |
| 226 return False | |
| 227 | |
| 228 def flags(self, index): | |
| 229 """ | |
| 230 Public method to get the item flags. | |
| 231 | |
| 232 @param index index of the item (QModelIndex) | |
| 233 @return flags (Qt.ItemFlags) | |
| 234 """ | |
| 235 if not index.isValid(): | |
| 236 return Qt.ItemFlags(Qt.ItemFlag.NoItemFlags) | |
| 237 return Qt.ItemFlags( | |
| 238 Qt.ItemFlag.ItemIsSelectable | | |
| 239 Qt.ItemFlag.ItemIsEnabled | | |
| 240 Qt.ItemFlag.ItemIsDragEnabled) | |
| 241 | |
| 242 def setSourceModel(self, sourceModel): | |
| 243 """ | |
| 244 Public method to set the source model. | |
| 245 | |
| 246 @param sourceModel reference to the source model (QAbstractItemModel) | |
| 247 """ | |
| 248 if self.sourceModel() is not None: | |
| 249 self.sourceModel().modelReset.disconnect(self.__sourceReset) | |
| 250 self.sourceModel().layoutChanged.disconnect(self.__sourceReset) | |
| 251 self.sourceModel().rowsInserted.disconnect( | |
| 252 self.__sourceRowsInserted) | |
| 253 self.sourceModel().rowsRemoved.disconnect(self.__sourceRowsRemoved) | |
| 254 | |
| 255 super().setSourceModel(sourceModel) | |
| 256 | |
| 257 if self.sourceModel() is not None: | |
| 258 self.__loaded = False | |
| 259 self.sourceModel().modelReset.connect(self.__sourceReset) | |
| 260 self.sourceModel().layoutChanged.connect(self.__sourceReset) | |
| 261 self.sourceModel().rowsInserted.connect(self.__sourceRowsInserted) | |
| 262 self.sourceModel().rowsRemoved.connect(self.__sourceRowsRemoved) | |
| 263 | |
| 264 self.beginResetModel() | |
| 265 self.endResetModel() | |
| 266 | |
| 267 def __sourceReset(self): | |
| 268 """ | |
| 269 Private slot to handle a reset of the source model. | |
| 270 """ | |
| 271 self.beginResetModel() | |
| 272 self.__sourceRowCache = [] | |
| 273 self.endResetModel() | |
| 274 | |
| 275 def __sourceRowsInserted(self, parent, start, end): | |
| 276 """ | |
| 277 Private slot to handle the insertion of data in the source model. | |
| 278 | |
| 279 @param parent reference to the parent index (QModelIndex) | |
| 280 @param start start row (integer) | |
| 281 @param end end row (integer) | |
| 282 """ | |
| 283 if not parent.isValid(): | |
| 284 if start != 0 or start != end: | |
| 285 self.beginResetModel() | |
| 286 self.__sourceRowCache = [] | |
| 287 self.endResetModel() | |
| 288 return | |
| 289 | |
| 290 self.__sourceRowCache = [] | |
| 291 treeIndex = self.mapFromSource(self.sourceModel().index(start, 0)) | |
| 292 treeParent = treeIndex.parent() | |
| 293 if self.rowCount(treeParent) == 1: | |
| 294 self.beginInsertRows(QModelIndex(), 0, 0) | |
| 295 self.endInsertRows() | |
| 296 else: | |
| 297 self.beginInsertRows(treeParent, treeIndex.row(), | |
| 298 treeIndex.row()) | |
| 299 self.endInsertRows() | |
| 300 | |
| 301 def mapFromSource(self, sourceIndex): | |
| 302 """ | |
| 303 Public method to map an index to the proxy model index. | |
| 304 | |
| 305 @param sourceIndex reference to a source model index (QModelIndex) | |
| 306 @return proxy model index (QModelIndex) | |
| 307 """ | |
| 308 if not sourceIndex.isValid(): | |
| 309 return QModelIndex() | |
| 310 | |
| 311 if len(self.__sourceRowCache) == 0: | |
| 312 self.rowCount(QModelIndex()) | |
| 313 | |
| 314 try: | |
| 315 row = self.__sourceRowCache.index(sourceIndex.row()) | |
| 316 except ValueError: | |
| 317 row = bisect.bisect_left(self.__sourceRowCache, sourceIndex.row()) | |
| 318 if ( | |
| 319 row == len(self.__sourceRowCache) or | |
| 320 self.__sourceRowCache[row] != sourceIndex.row() | |
| 321 ): | |
| 322 row -= 1 | |
| 323 dateRow = max(0, row) | |
| 324 row = sourceIndex.row() - self.__sourceRowCache[dateRow] | |
| 325 return self.createIndex(row, sourceIndex.column(), dateRow + 1) | |
| 326 | |
| 327 def removeRows(self, row, count, parent=None): | |
| 328 """ | |
| 329 Public method to remove entries from the model. | |
| 330 | |
| 331 @param row row of the first entry to remove (integer) | |
| 332 @param count number of entries to remove (integer) | |
| 333 @param parent index of the parent entry (QModelIndex) | |
| 334 @return flag indicating successful removal (boolean) | |
| 335 """ | |
| 336 if parent is None: | |
| 337 parent = QModelIndex() | |
| 338 | |
| 339 if ( | |
| 340 row < 0 or | |
| 341 count <= 0 or | |
| 342 row + count > self.rowCount(parent) | |
| 343 ): | |
| 344 return False | |
| 345 | |
| 346 self.__removingDown = True | |
| 347 if parent.isValid() and self.rowCount(parent) == count - row: | |
| 348 self.beginRemoveRows(QModelIndex(), parent.row(), parent.row()) | |
| 349 else: | |
| 350 self.beginRemoveRows(parent, row, row + count - 1) | |
| 351 if parent.isValid(): | |
| 352 # removing pages | |
| 353 offset = self.__sourceDateRow(parent.row()) | |
| 354 return self.sourceModel().removeRows(offset + row, count) | |
| 355 else: | |
| 356 # removing whole dates | |
| 357 for i in range(row + count - 1, row - 1, -1): | |
| 358 dateParent = self.index(i, 0) | |
| 359 offset = self.__sourceDateRow(dateParent.row()) | |
| 360 if not self.sourceModel().removeRows( | |
| 361 offset, self.rowCount(dateParent)): | |
| 362 return False | |
| 363 return True | |
| 364 | |
| 365 def __sourceRowsRemoved(self, parent, start, end): | |
| 366 """ | |
| 367 Private slot to handle the removal of data in the source model. | |
| 368 | |
| 369 @param parent reference to the parent index (QModelIndex) | |
| 370 @param start start row (integer) | |
| 371 @param end end row (integer) | |
| 372 """ | |
| 373 if not self.__removingDown: | |
| 374 self.beginResetModel() | |
| 375 self.__sourceRowCache = [] | |
| 376 self.endResetModel() | |
| 377 return | |
| 378 | |
| 379 if not parent.isValid(): | |
| 380 if self.__sourceRowCache: | |
| 381 i = end | |
| 382 while i >= start: | |
| 383 try: | |
| 384 ind = self.__sourceRowCache.index(i) | |
| 385 except ValueError: | |
| 386 ind = bisect.bisect_left(self.__sourceRowCache, i) | |
| 387 if ( | |
| 388 ind == len(self.__sourceRowCache) or | |
| 389 self.__sourceRowCache[ind] != i | |
| 390 ): | |
| 391 ind -= 1 | |
| 392 row = max(0, ind) | |
| 393 offset = self.__sourceRowCache[row] | |
| 394 dateParent = self.index(row, 0) | |
| 395 # If we can remove all the rows in the date do that | |
| 396 # and skip over them. | |
| 397 rc = self.rowCount(dateParent) | |
| 398 if i - rc + 1 == offset and start <= i - rc + 1: | |
| 399 del self.__sourceRowCache[row] | |
| 400 i -= rc + 1 | |
| 401 else: | |
| 402 row += 1 | |
| 403 i -= 1 | |
| 404 for j in range(row, len(self.__sourceRowCache)): | |
| 405 self.__sourceRowCache[j] -= 1 | |
| 406 | |
| 407 if self.__removingDown: | |
| 408 self.endRemoveRows() | |
| 409 self.__removingDown = False |
