Mercurial Repositories > eric / file comparison
comparison: eric6/WebBrowser/History/HistoryTreeModel.py
eric6/WebBrowser/History/HistoryTreeModel.py
- changeset 6942
- 2602857055c5
- parent 6645
- ad476851d7e0
- child 7229
- 53054eb5b15a
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| 6941:f99d60d6b59b | 6942:2602857055c5 |
|---|---|
| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2009 - 2019 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=None): | |
| 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 if parent is None: | |
| 93 parent = QModelIndex() | |
| 94 | |
| 95 return self.sourceModel().columnCount(self.mapToSource(parent)) | |
| 96 | |
| 97 def rowCount(self, parent=None): | |
| 98 """ | |
| 99 Public method to determine the number of rows. | |
| 100 | |
| 101 @param parent index of parent (QModelIndex) | |
| 102 @return number of rows (integer) | |
| 103 """ | |
| 104 if parent is None: | |
| 105 parent = QModelIndex() | |
| 106 | |
| 107 if parent.internalId() != 0 or \ | |
| 108 parent.column() > 0 or \ | |
| 109 self.sourceModel() is None: | |
| 110 return 0 | |
| 111 | |
| 112 # row count OF dates | |
| 113 if not parent.isValid(): | |
| 114 if self.__sourceRowCache: | |
| 115 return len(self.__sourceRowCache) | |
| 116 | |
| 117 currentDate = QDate() | |
| 118 rows = 0 | |
| 119 totalRows = self.sourceModel().rowCount() | |
| 120 | |
| 121 for row in range(totalRows): | |
| 122 rowDate = self.sourceModel().index(row, 0)\ | |
| 123 .data(HistoryModel.DateRole) | |
| 124 if rowDate != currentDate: | |
| 125 self.__sourceRowCache.append(row) | |
| 126 currentDate = rowDate | |
| 127 rows += 1 | |
| 128 return rows | |
| 129 | |
| 130 # row count FOR a date | |
| 131 start = self.__sourceDateRow(parent.row()) | |
| 132 end = self.__sourceDateRow(parent.row() + 1) | |
| 133 return end - start | |
| 134 | |
| 135 def __sourceDateRow(self, row): | |
| 136 """ | |
| 137 Private method to translate the top level date row into the offset | |
| 138 where that date starts. | |
| 139 | |
| 140 @param row row number of the date (integer) | |
| 141 @return offset where that date starts (integer) | |
| 142 """ | |
| 143 if row <= 0: | |
| 144 return 0 | |
| 145 | |
| 146 if len(self.__sourceRowCache) == 0: | |
| 147 self.rowCount(QModelIndex()) | |
| 148 | |
| 149 if row >= len(self.__sourceRowCache): | |
| 150 if self.sourceModel() is None: | |
| 151 return 0 | |
| 152 return self.sourceModel().rowCount() | |
| 153 | |
| 154 return self.__sourceRowCache[row] | |
| 155 | |
| 156 def mapToSource(self, proxyIndex): | |
| 157 """ | |
| 158 Public method to map an index to the source model index. | |
| 159 | |
| 160 @param proxyIndex reference to a proxy model index (QModelIndex) | |
| 161 @return source model index (QModelIndex) | |
| 162 """ | |
| 163 offset = proxyIndex.internalId() | |
| 164 if offset == 0: | |
| 165 return QModelIndex() | |
| 166 startDateRow = self.__sourceDateRow(offset - 1) | |
| 167 return self.sourceModel().index( | |
| 168 startDateRow + proxyIndex.row(), proxyIndex.column()) | |
| 169 | |
| 170 def index(self, row, column, parent=None): | |
| 171 """ | |
| 172 Public method to create an index. | |
| 173 | |
| 174 @param row row number for the index (integer) | |
| 175 @param column column number for the index (integer) | |
| 176 @param parent index of the parent item (QModelIndex) | |
| 177 @return requested index (QModelIndex) | |
| 178 """ | |
| 179 if parent is None: | |
| 180 parent = QModelIndex() | |
| 181 | |
| 182 if row < 0 or \ | |
| 183 column < 0 or \ | |
| 184 column >= self.columnCount(parent) or \ | |
| 185 parent.column() > 0: | |
| 186 return QModelIndex() | |
| 187 | |
| 188 if not parent.isValid(): | |
| 189 return self.createIndex(row, column, 0) | |
| 190 return self.createIndex(row, column, parent.row() + 1) | |
| 191 | |
| 192 def parent(self, index): | |
| 193 """ | |
| 194 Public method to get the parent index. | |
| 195 | |
| 196 @param index index of item to get parent (QModelIndex) | |
| 197 @return index of parent (QModelIndex) | |
| 198 """ | |
| 199 offset = index.internalId() | |
| 200 if offset == 0 or not index.isValid(): | |
| 201 return QModelIndex() | |
| 202 return self.createIndex(offset - 1, 0, 0) | |
| 203 | |
| 204 def hasChildren(self, parent=None): | |
| 205 """ | |
| 206 Public method to check, if an entry has some children. | |
| 207 | |
| 208 @param parent index of the entry to check (QModelIndex) | |
| 209 @return flag indicating the presence of children (boolean) | |
| 210 """ | |
| 211 if parent is None: | |
| 212 parent = QModelIndex() | |
| 213 | |
| 214 grandparent = parent.parent() | |
| 215 if not grandparent.isValid(): | |
| 216 return True | |
| 217 return False | |
| 218 | |
| 219 def flags(self, index): | |
| 220 """ | |
| 221 Public method to get the item flags. | |
| 222 | |
| 223 @param index index of the item (QModelIndex) | |
| 224 @return flags (Qt.ItemFlags) | |
| 225 """ | |
| 226 if not index.isValid(): | |
| 227 return Qt.ItemFlags(Qt.NoItemFlags) | |
| 228 return Qt.ItemFlags( | |
| 229 Qt.ItemIsSelectable | Qt.ItemIsEnabled | Qt.ItemIsDragEnabled) | |
| 230 | |
| 231 def setSourceModel(self, sourceModel): | |
| 232 """ | |
| 233 Public method to set the source model. | |
| 234 | |
| 235 @param sourceModel reference to the source model (QAbstractItemModel) | |
| 236 """ | |
| 237 if self.sourceModel() is not None: | |
| 238 self.sourceModel().modelReset.disconnect(self.__sourceReset) | |
| 239 self.sourceModel().layoutChanged.disconnect(self.__sourceReset) | |
| 240 self.sourceModel().rowsInserted.disconnect( | |
| 241 self.__sourceRowsInserted) | |
| 242 self.sourceModel().rowsRemoved.disconnect(self.__sourceRowsRemoved) | |
| 243 | |
| 244 super(HistoryTreeModel, self).setSourceModel(sourceModel) | |
| 245 | |
| 246 if self.sourceModel() is not None: | |
| 247 self.__loaded = False | |
| 248 self.sourceModel().modelReset.connect(self.__sourceReset) | |
| 249 self.sourceModel().layoutChanged.connect(self.__sourceReset) | |
| 250 self.sourceModel().rowsInserted.connect(self.__sourceRowsInserted) | |
| 251 self.sourceModel().rowsRemoved.connect(self.__sourceRowsRemoved) | |
| 252 | |
| 253 self.beginResetModel() | |
| 254 self.endResetModel() | |
| 255 | |
| 256 def __sourceReset(self): | |
| 257 """ | |
| 258 Private slot to handle a reset of the source model. | |
| 259 """ | |
| 260 self.beginResetModel() | |
| 261 self.__sourceRowCache = [] | |
| 262 self.endResetModel() | |
| 263 | |
| 264 def __sourceRowsInserted(self, parent, start, end): | |
| 265 """ | |
| 266 Private slot to handle the insertion of data in the source model. | |
| 267 | |
| 268 @param parent reference to the parent index (QModelIndex) | |
| 269 @param start start row (integer) | |
| 270 @param end end row (integer) | |
| 271 """ | |
| 272 if not parent.isValid(): | |
| 273 if start != 0 or start != end: | |
| 274 self.beginResetModel() | |
| 275 self.__sourceRowCache = [] | |
| 276 self.endResetModel() | |
| 277 return | |
| 278 | |
| 279 self.__sourceRowCache = [] | |
| 280 treeIndex = self.mapFromSource(self.sourceModel().index(start, 0)) | |
| 281 treeParent = treeIndex.parent() | |
| 282 if self.rowCount(treeParent) == 1: | |
| 283 self.beginInsertRows(QModelIndex(), 0, 0) | |
| 284 self.endInsertRows() | |
| 285 else: | |
| 286 self.beginInsertRows(treeParent, treeIndex.row(), | |
| 287 treeIndex.row()) | |
| 288 self.endInsertRows() | |
| 289 | |
| 290 def mapFromSource(self, sourceIndex): | |
| 291 """ | |
| 292 Public method to map an index to the proxy model index. | |
| 293 | |
| 294 @param sourceIndex reference to a source model index (QModelIndex) | |
| 295 @return proxy model index (QModelIndex) | |
| 296 """ | |
| 297 if not sourceIndex.isValid(): | |
| 298 return QModelIndex() | |
| 299 | |
| 300 if len(self.__sourceRowCache) == 0: | |
| 301 self.rowCount(QModelIndex()) | |
| 302 | |
| 303 try: | |
| 304 row = self.__sourceRowCache.index(sourceIndex.row()) | |
| 305 except ValueError: | |
| 306 row = bisect.bisect_left(self.__sourceRowCache, sourceIndex.row()) | |
| 307 if row == len(self.__sourceRowCache) or \ | |
| 308 self.__sourceRowCache[row] != sourceIndex.row(): | |
| 309 row -= 1 | |
| 310 dateRow = max(0, row) | |
| 311 row = sourceIndex.row() - self.__sourceRowCache[dateRow] | |
| 312 return self.createIndex(row, sourceIndex.column(), dateRow + 1) | |
| 313 | |
| 314 def removeRows(self, row, count, parent=None): | |
| 315 """ | |
| 316 Public method to remove entries from the model. | |
| 317 | |
| 318 @param row row of the first entry to remove (integer) | |
| 319 @param count number of entries to remove (integer) | |
| 320 @param parent index of the parent entry (QModelIndex) | |
| 321 @return flag indicating successful removal (boolean) | |
| 322 """ | |
| 323 if parent is None: | |
| 324 parent = QModelIndex() | |
| 325 | |
| 326 if row < 0 or \ | |
| 327 count <= 0 or \ | |
| 328 row + count > self.rowCount(parent): | |
| 329 return False | |
| 330 | |
| 331 self.__removingDown = True | |
| 332 if parent.isValid() and self.rowCount(parent) == count - row: | |
| 333 self.beginRemoveRows(QModelIndex(), parent.row(), parent.row()) | |
| 334 else: | |
| 335 self.beginRemoveRows(parent, row, row + count - 1) | |
| 336 if parent.isValid(): | |
| 337 # removing pages | |
| 338 offset = self.__sourceDateRow(parent.row()) | |
| 339 return self.sourceModel().removeRows(offset + row, count) | |
| 340 else: | |
| 341 # removing whole dates | |
| 342 for i in range(row + count - 1, row - 1, -1): | |
| 343 dateParent = self.index(i, 0) | |
| 344 offset = self.__sourceDateRow(dateParent.row()) | |
| 345 if not self.sourceModel().removeRows( | |
| 346 offset, self.rowCount(dateParent)): | |
| 347 return False | |
| 348 return True | |
| 349 | |
| 350 def __sourceRowsRemoved(self, parent, start, end): | |
| 351 """ | |
| 352 Private slot to handle the removal of data in the source model. | |
| 353 | |
| 354 @param parent reference to the parent index (QModelIndex) | |
| 355 @param start start row (integer) | |
| 356 @param end end row (integer) | |
| 357 """ | |
| 358 if not self.__removingDown: | |
| 359 self.beginResetModel() | |
| 360 self.__sourceRowCache = [] | |
| 361 self.endResetModel() | |
| 362 return | |
| 363 | |
| 364 if not parent.isValid(): | |
| 365 if self.__sourceRowCache: | |
| 366 i = end | |
| 367 while i >= start: | |
| 368 try: | |
| 369 ind = self.__sourceRowCache.index(i) | |
| 370 except ValueError: | |
| 371 ind = bisect.bisect_left(self.__sourceRowCache, i) | |
| 372 if ind == len(self.__sourceRowCache) or \ | |
| 373 self.__sourceRowCache[ind] != i: | |
| 374 ind -= 1 | |
| 375 row = max(0, ind) | |
| 376 offset = self.__sourceRowCache[row] | |
| 377 dateParent = self.index(row, 0) | |
| 378 # If we can remove all the rows in the date do that | |
| 379 # and skip over them. | |
| 380 rc = self.rowCount(dateParent) | |
| 381 if i - rc + 1 == offset and start <= i - rc + 1: | |
| 382 del self.__sourceRowCache[row] | |
| 383 i -= rc + 1 | |
| 384 else: | |
| 385 row += 1 | |
| 386 i -= 1 | |
| 387 for j in range(row, len(self.__sourceRowCache)): | |
| 388 self.__sourceRowCache[j] -= 1 | |
| 389 | |
| 390 if self.__removingDown: | |
| 391 self.endRemoveRows() | |
| 392 self.__removingDown = False |
