Mercurial Repositories > eric / file comparison
comparison: eric7/HelpViewer/HelpViewerWidget.py
eric7/HelpViewer/HelpViewerWidget.py
- branch
- eric7
- changeset 8680
- 85503ff2fce9
- parent 8679
- fd172973428e
- child 8681
- 6285e8374d99
equal
deleted
inserted
replaced
| 8679:fd172973428e | 8680:85503ff2fce9 |
|---|---|
| 5 | 5 |
| 6 """ | 6 """ |
| 7 Module implementing an embedded viewer for QtHelp and local HTML files. | 7 Module implementing an embedded viewer for QtHelp and local HTML files. |
| 8 """ | 8 """ |
| 9 | 9 |
| 10 from PyQt6.QtCore import pyqtSlot, QUrl | 10 import os |
| 11 from PyQt6.QtGui import QTextDocument | 11 |
| 12 from PyQt6.QtCore import pyqtSlot, Qt, QUrl | |
| 13 from PyQt6.QtGui import QAction | |
| 14 from PyQt6.QtHelp import QHelpEngine | |
| 12 from PyQt6.QtWidgets import ( | 15 from PyQt6.QtWidgets import ( |
| 13 QWidget, QHBoxLayout, QVBoxLayout, QComboBox, QSizePolicy, QStackedWidget, | 16 QWidget, QHBoxLayout, QVBoxLayout, QComboBox, QSizePolicy, QStackedWidget, |
| 14 QToolButton, QButtonGroup, QAbstractButton | 17 QToolButton, QButtonGroup, QAbstractButton, QMenu |
| 15 ) | 18 ) |
| 16 | 19 |
| 20 from EricWidgets import EricFileDialog, EricMessageBox | |
| 21 | |
| 17 import UI.PixmapCache | 22 import UI.PixmapCache |
| 23 import Utilities | |
| 24 import Preferences | |
| 18 | 25 |
| 19 from .OpenPagesWidget import OpenPagesWidget | 26 from .OpenPagesWidget import OpenPagesWidget |
| 20 | 27 |
| 21 | 28 |
| 22 class HelpViewerWidget(QWidget): | 29 class HelpViewerWidget(QWidget): |
| 31 @type QWidget (optional) | 38 @type QWidget (optional) |
| 32 """ | 39 """ |
| 33 super().__init__(parent) | 40 super().__init__(parent) |
| 34 self.setObjectName("HelpViewerWidget") | 41 self.setObjectName("HelpViewerWidget") |
| 35 | 42 |
| 43 self.__ui = parent | |
| 44 | |
| 36 self.__layout = QVBoxLayout() | 45 self.__layout = QVBoxLayout() |
| 37 self.__layout.setObjectName("MainLayout") | 46 self.__layout.setObjectName("MainLayout") |
| 38 self.__layout.setContentsMargins(0, 3, 0, 0) | 47 self.__layout.setContentsMargins(0, 3, 0, 0) |
| 39 | 48 |
| 40 ################################################################### | 49 ################################################################### |
| 44 self.__helpSelector = QComboBox(self) | 53 self.__helpSelector = QComboBox(self) |
| 45 self.__helpSelector.setSizePolicy( | 54 self.__helpSelector.setSizePolicy( |
| 46 QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Preferred) | 55 QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Preferred) |
| 47 self.__selectorLayout.addWidget(self.__helpSelector) | 56 self.__selectorLayout.addWidget(self.__helpSelector) |
| 48 self.__populateHelpSelector() | 57 self.__populateHelpSelector() |
| 58 self.__helpSelector.currentIndexChanged.connect( | |
| 59 self.__helpTopicSelected) | |
| 49 | 60 |
| 50 self.__openButton = QToolButton(self) | 61 self.__openButton = QToolButton(self) |
| 51 self.__openButton.setIcon(UI.PixmapCache.getIcon("open")) | 62 self.__openButton.setIcon(UI.PixmapCache.getIcon("open")) |
| 52 self.__openButton.setToolTip(self.tr("Open a local file")) | 63 self.__openButton.setToolTip(self.tr("Open a local file")) |
| 53 self.__openButton.clicked.connect(self.__openFile) | 64 self.__openButton.clicked.connect(self.__openFile) |
| 54 self.__selectorLayout.addWidget(self.__openButton) | 65 self.__selectorLayout.addWidget(self.__openButton) |
| 55 | 66 |
| 67 self.__actionsButton = QToolButton(self) | |
| 68 self.__actionsButton.setIcon( | |
| 69 UI.PixmapCache.getIcon("actionsToolButton")) | |
| 70 self.__actionsButton.setToolTip( | |
| 71 self.tr("Select action from menu")) | |
| 72 self.__actionsButton.setPopupMode( | |
| 73 QToolButton.ToolButtonPopupMode.InstantPopup) | |
| 74 self.__selectorLayout.addWidget(self.__actionsButton) | |
| 75 | |
| 56 self.__layout.addLayout(self.__selectorLayout) | 76 self.__layout.addLayout(self.__selectorLayout) |
| 57 | 77 |
| 78 ################################################################### | |
| 79 | |
| 80 self.__navButtonsLayout = QHBoxLayout() | |
| 81 | |
| 82 self.__navButtonsLayout.addStretch() | |
| 83 | |
| 84 # TODO: add backward button | |
| 85 self.__backwardButton = QToolButton(self) | |
| 86 self.__backwardButton.setIcon(UI.PixmapCache.getIcon("back")) | |
| 87 self.__backwardButton.setToolTip(self.tr("Move one page backward")) | |
| 88 self.__backwardButton.setToolButtonStyle( | |
| 89 Qt.ToolButtonStyle.ToolButtonIconOnly) | |
| 90 self.__backwardButton.setAutoRaise(True) | |
| 91 self.__backwardButton.clicked.connect(self.__backward) | |
| 92 | |
| 93 # TODO: add forward button | |
| 94 self.__forwardButton = QToolButton(self) | |
| 95 self.__forwardButton.setIcon(UI.PixmapCache.getIcon("forward")) | |
| 96 self.__forwardButton.setToolTip(self.tr("Move one page forward")) | |
| 97 self.__forwardButton.setToolButtonStyle( | |
| 98 Qt.ToolButtonStyle.ToolButtonIconOnly) | |
| 99 self.__forwardButton.setAutoRaise(True) | |
| 100 self.__forwardButton.clicked.connect(self.__forward) | |
| 101 | |
| 102 self.__backForButtonLayout = QHBoxLayout() | |
| 103 self.__backForButtonLayout.setContentsMargins(0, 0, 0, 0) | |
| 104 self.__backForButtonLayout.setSpacing(0) | |
| 105 self.__backForButtonLayout.addWidget(self.__backwardButton) | |
| 106 self.__backForButtonLayout.addWidget(self.__forwardButton) | |
| 107 self.__navButtonsLayout.addLayout(self.__backForButtonLayout) | |
| 108 | |
| 109 # TODO: add reload button | |
| 110 self.__reloadButton = QToolButton(self) | |
| 111 self.__reloadButton.setIcon(UI.PixmapCache.getIcon("reload")) | |
| 112 self.__reloadButton.setToolTip(self.tr("Reload the current page")) | |
| 113 self.__reloadButton.clicked.connect(self.__reload) | |
| 114 self.__navButtonsLayout.addWidget(self.__reloadButton) | |
| 115 | |
| 116 # TODO: add zoom in button | |
| 117 # TODO: add zoom out button | |
| 118 # TODO: add zoom reset button | |
| 119 | |
| 120 self.__navButtonsLayout.addStretch() | |
| 121 | |
| 122 self.__layout.addLayout(self.__navButtonsLayout) | |
| 123 | |
| 124 self.__backMenu = QMenu(self) | |
| 125 self.__backMenu.triggered.connect(self.__navigationMenuActionTriggered) | |
| 126 self.__backwardButton.setMenu(self.__backMenu) | |
| 127 self.__backMenu.aboutToShow.connect(self.__showBackMenu) | |
| 128 | |
| 129 self.__forwardMenu = QMenu(self) | |
| 130 self.__forwardMenu.triggered.connect( | |
| 131 self.__navigationMenuActionTriggered) | |
| 132 self.__forwardButton.setMenu(self.__forwardMenu) | |
| 133 self.__forwardMenu.aboutToShow.connect(self.__showForwardMenu) | |
| 134 | |
| 58 ################################################################### | 135 ################################################################### |
| 59 | 136 |
| 60 self.__helpStack = QStackedWidget(self) | 137 self.__helpStack = QStackedWidget(self) |
| 61 self.__helpStack.setSizePolicy( | 138 self.__helpStack.setSizePolicy( |
| 62 QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Expanding) | 139 QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Expanding) |
| 80 self.__buttonGroup.buttonClicked.connect( | 157 self.__buttonGroup.buttonClicked.connect( |
| 81 self.__selectNavigationWidget) | 158 self.__selectNavigationWidget) |
| 82 | 159 |
| 83 self.__buttonLayout.addStretch() | 160 self.__buttonLayout.addStretch() |
| 84 | 161 |
| 85 self.__openPagesButton = QToolButton(self) | 162 self.__openPagesButton = self.__addNavigationButton( |
| 86 self.__openPagesButton.setIcon(UI.PixmapCache.getIcon("fileMisc")) | 163 "fileMisc", self.tr("Show list of open pages")) |
| 87 self.__openPagesButton.setToolTip(self.tr("Show list of open pages")) | 164 |
| 88 self.__openPagesButton.setCheckable(True) | 165 # TODO: add buttons for the QHelp related widgets |
| 89 self.__buttonGroup.addButton(self.__openPagesButton) | |
| 90 self.__buttonLayout.addWidget(self.__openPagesButton) | |
| 91 | 166 |
| 92 self.__buttonLayout.addStretch() | 167 self.__buttonLayout.addStretch() |
| 93 | 168 |
| 94 self.__layout.addLayout(self.__buttonLayout) | 169 self.__layout.addLayout(self.__buttonLayout) |
| 95 | 170 |
| 97 | 172 |
| 98 self.setLayout(self.__layout) | 173 self.setLayout(self.__layout) |
| 99 | 174 |
| 100 self.__openPagesButton.setChecked(True) | 175 self.__openPagesButton.setChecked(True) |
| 101 | 176 |
| 177 self.__initHelpEngine() | |
| 178 | |
| 179 self.__ui.preferencesChanged.connect(self.__populateHelpSelector) | |
| 180 | |
| 181 self.__initActionsMenu() | |
| 182 | |
| 102 self.addPage() | 183 self.addPage() |
| 184 self.__checkActionButtons(0) | |
| 185 | |
| 186 def __addNavigationButton(self, iconName, toolTip): | |
| 187 """ | |
| 188 Private method to create and add a navigation button. | |
| 189 | |
| 190 @param iconName name of the icon | |
| 191 @type str | |
| 192 @param toolTip tooltip to be shown | |
| 193 @type str | |
| 194 @return reference to the created button | |
| 195 @rtype QToolButton | |
| 196 """ | |
| 197 button = QToolButton(self) | |
| 198 button.setIcon(UI.PixmapCache.getIcon(iconName)) | |
| 199 button.setToolTip(toolTip) | |
| 200 button.setCheckable(True) | |
| 201 self.__buttonGroup.addButton(button) | |
| 202 self.__buttonLayout.addWidget(button) | |
| 203 | |
| 204 return button | |
| 103 | 205 |
| 104 def __populateNavigationStack(self): | 206 def __populateNavigationStack(self): |
| 105 """ | 207 """ |
| 106 Private method to populate the stack of navigation widgets. | 208 Private method to populate the stack of navigation widgets. |
| 107 """ | 209 """ |
| 108 self.__openPagesList = OpenPagesWidget(self.__helpStack, self) | 210 self.__openPagesList = OpenPagesWidget(self.__helpStack, self) |
| 211 self.__openPagesList.currentChanged.connect(self.__checkActionButtons) | |
| 109 self.__helpNavigationStack.addWidget(self.__openPagesList) | 212 self.__helpNavigationStack.addWidget(self.__openPagesList) |
| 110 | 213 |
| 111 # TODO: not yet implemented | 214 # TODO: not yet implemented |
| 112 | 215 |
| 113 @pyqtSlot(QAbstractButton) | 216 @pyqtSlot(QAbstractButton) |
| 125 | 228 |
| 126 def __populateHelpSelector(self): | 229 def __populateHelpSelector(self): |
| 127 """ | 230 """ |
| 128 Private method to populate the help selection combo box. | 231 Private method to populate the help selection combo box. |
| 129 """ | 232 """ |
| 130 # TODO: not yet implemented | 233 self.__helpSelector.clear() |
| 234 | |
| 235 self.__helpSelector.addItem("", "") | |
| 236 | |
| 237 for key, topic in [ | |
| 238 ("EricDocDir", self.tr("eric API Documentation")), | |
| 239 ("PythonDocDir", self.tr("Python 3 Documentation")), | |
| 240 ("Qt5DocDir", self.tr("Qt5 Documentation")), | |
| 241 ("Qt6DocDir", self.tr("Qt6 Documentation")), | |
| 242 ("PyQt5DocDir", self.tr("PyQt5 Documentation")), | |
| 243 ("PyQt6DocDir", self.tr("PyQt6 Documentation")), | |
| 244 ("PySide2DocDir", self.tr("PySide2 Documentation")), | |
| 245 ("PySide6DocDir", self.tr("PySide6 Documentation")), | |
| 246 ]: | |
| 247 urlStr = Preferences.getHelp(key) | |
| 248 if urlStr: | |
| 249 self.__helpSelector.addItem(topic, urlStr) | |
| 250 | |
| 251 @pyqtSlot() | |
| 252 def __helpTopicSelected(self): | |
| 253 """ | |
| 254 Private slot handling the selection of a new help topic. | |
| 255 """ | |
| 256 urlStr = self.__helpSelector.currentData() | |
| 257 if urlStr: | |
| 258 url = QUrl(urlStr) | |
| 259 self.currentViewer().setUrl(url) | |
| 131 | 260 |
| 132 def searchQtHelp(self, searchExpression): | 261 def searchQtHelp(self, searchExpression): |
| 133 """ | 262 """ |
| 134 Public method to search for a given search expression. | 263 Public method to search for a given search expression. |
| 135 | 264 |
| 153 @pyqtSlot() | 282 @pyqtSlot() |
| 154 def __openFile(self): | 283 def __openFile(self): |
| 155 """ | 284 """ |
| 156 Private slot to open a local help file (*.html). | 285 Private slot to open a local help file (*.html). |
| 157 """ | 286 """ |
| 158 # TODO: not yet implemented | 287 htmlFile = EricFileDialog.getOpenFileName( |
| 288 self, | |
| 289 self.tr("Open HTML File"), | |
| 290 "", | |
| 291 self.tr("HTML Files (*.htm *.html);;All Files (*)") | |
| 292 ) | |
| 293 if htmlFile: | |
| 294 self.currentViewer().setUrl(QUrl.fromLocalFile(htmlFile)) | |
| 159 | 295 |
| 160 def addPage(self, url=QUrl("about:blank")): | 296 def addPage(self, url=QUrl("about:blank")): |
| 161 """ | 297 """ |
| 162 Public method to add a new help page with the given URL. | 298 Public method to add a new help page with the given URL. |
| 163 | 299 |
| 164 @param url requested URL (defaults to QUrl("about:blank")) | 300 @param url requested URL (defaults to QUrl("about:blank")) |
| 165 @type QUrl (optional) | 301 @type QUrl (optional) |
| 166 """ | 302 """ |
| 303 viewer = self.__newViewer() | |
| 304 viewer.setUrl(url) | |
| 305 | |
| 306 self.__helpStack.addWidget(viewer) | |
| 307 self.__openPagesList.addPage(viewer) | |
| 308 | |
| 309 def __newViewer(self): | |
| 310 """ | |
| 311 Private method to create a new help viewer. | |
| 312 | |
| 313 @return help viewer | |
| 314 @rtype HelpViewerImpl | |
| 315 """ | |
| 167 try: | 316 try: |
| 168 from .HelpViewerImpl_qwe import HelpViewerImpl_qwe | 317 from .HelpViewerImpl_qwe import HelpViewerImpl_qwe |
| 169 viewer = HelpViewerImpl_qwe(self) | 318 viewer = HelpViewerImpl_qwe(self.__helpEngine, self) |
| 170 except ImportError: | 319 except ImportError: |
| 171 from .HelpViewerImpl_qtb import HelpViewerImpl_qtb | 320 from .HelpViewerImpl_qtb import HelpViewerImpl_qtb |
| 172 viewer = HelpViewerImpl_qtb(self) | 321 viewer = HelpViewerImpl_qtb(self.__helpEngine, self) |
| 173 | 322 return viewer |
| 174 self.__helpStack.addWidget(viewer) | 323 |
| 175 self.__openPagesList.addPage(viewer) | 324 def currentViewer(self): |
| 176 | 325 """ |
| 177 viewer.setSource(url, QTextDocument.ResourceType.HtmlResource) | 326 Public method to get the active viewer. |
| 327 | |
| 328 @return reference to the active help viewer | |
| 329 @rtype HelpViewerImpl | |
| 330 """ | |
| 331 return self.__helpStack.currentWidget() | |
| 332 | |
| 333 ####################################################################### | |
| 334 ## QtHelp related code below | |
| 335 ####################################################################### | |
| 336 | |
| 337 def __initHelpEngine(self): | |
| 338 """ | |
| 339 Private method to initialize the QtHelp related stuff. | |
| 340 """ | |
| 341 self.__helpEngine = QHelpEngine( | |
| 342 self.__getQtHelpCollectionFileName(), | |
| 343 self) | |
| 344 self.__helpEngine.setReadOnly(False) | |
| 345 self.__helpEngine.setupData() | |
| 346 self.__helpEngine.setUsesFilterEngine(True) | |
| 347 self.__removeOldDocumentation() | |
| 348 self.__helpEngine.warning.connect(self.__warning) | |
| 349 | |
| 350 def __getQtHelpCollectionFileName(cls): | |
| 351 """ | |
| 352 Private method to determine the name of the QtHelp collection file. | |
| 353 | |
| 354 @return path of the QtHelp collection file | |
| 355 @rtype str | |
| 356 """ | |
| 357 qthelpDir = os.path.join(Utilities.getConfigDir(), "qthelp") | |
| 358 if not os.path.exists(qthelpDir): | |
| 359 os.makedirs(qthelpDir) | |
| 360 return os.path.join(qthelpDir, "eric7help.qhc") | |
| 361 | |
| 362 @pyqtSlot(str) | |
| 363 def __warning(self, msg): | |
| 364 """ | |
| 365 Private slot handling warnings of the help engine. | |
| 366 | |
| 367 @param msg message sent by the help engine | |
| 368 @type str | |
| 369 """ | |
| 370 EricMessageBox.warning( | |
| 371 self, | |
| 372 self.tr("Help Engine"), msg) | |
| 373 | |
| 374 @pyqtSlot() | |
| 375 def __removeOldDocumentation(self): | |
| 376 """ | |
| 377 Private slot to remove non-existing documentation from the help engine. | |
| 378 """ | |
| 379 for namespace in self.__helpEngine.registeredDocumentations(): | |
| 380 docFile = self.__helpEngine.documentationFileName(namespace) | |
| 381 if not os.path.exists(docFile): | |
| 382 self.__helpEngine.unregisterDocumentation(namespace) | |
| 383 | |
| 384 @pyqtSlot() | |
| 385 def __manageQtHelpDocuments(self): | |
| 386 """ | |
| 387 Private slot to manage the QtHelp documentation database. | |
| 388 """ | |
| 389 from WebBrowser.QtHelp.QtHelpDocumentationConfigurationDialog import ( | |
| 390 QtHelpDocumentationConfigurationDialog | |
| 391 ) | |
| 392 dlg = QtHelpDocumentationConfigurationDialog( | |
| 393 self.__helpEngine, self) | |
| 394 dlg.exec() | |
| 395 | |
| 396 @pyqtSlot() | |
| 397 def __reindexDocumentation(self): | |
| 398 """ | |
| 399 Private slot | |
| 400 """ | |
| 401 | |
| 402 ####################################################################### | |
| 403 ## Actions Menu related methods | |
| 404 ####################################################################### | |
| 405 | |
| 406 def __initActionsMenu(self): | |
| 407 """ | |
| 408 Private method to initialize the actions menu. | |
| 409 """ | |
| 410 self.__actionsMenu = QMenu() | |
| 411 self.__actionsMenu.setToolTipsVisible(True) | |
| 412 | |
| 413 self.__actionsMenu.addAction(self.tr("Manage QtHelp Documents"), | |
| 414 self.__manageQtHelpDocuments) | |
| 415 act = self.__actionsMenu.addAction(self.tr("Reindex Documentation"), | |
| 416 self.__reindexDocumentation) | |
| 417 ## act.triggered.connect(self.__searchEngine.reindexDocumentation) | |
| 418 | |
| 419 self.__actionsButton.setMenu(self.__actionsMenu) | |
| 420 | |
| 421 ####################################################################### | |
| 422 ## Navigation related methods below | |
| 423 ####################################################################### | |
| 424 | |
| 425 @pyqtSlot() | |
| 426 def __backward(self): | |
| 427 """ | |
| 428 Private slot to move one page backward. | |
| 429 """ | |
| 430 cv = self.currentViewer() | |
| 431 if cv: | |
| 432 cv.backward() | |
| 433 | |
| 434 @pyqtSlot() | |
| 435 def __forward(self): | |
| 436 """ | |
| 437 Private slot to move one page foreward. | |
| 438 """ | |
| 439 cv = self.currentViewer() | |
| 440 if cv: | |
| 441 cv.forward() | |
| 442 | |
| 443 @pyqtSlot() | |
| 444 def __reload(self): | |
| 445 """ | |
| 446 Private slot to reload the current page. | |
| 447 """ | |
| 448 cv = self.currentViewer() | |
| 449 if cv: | |
| 450 cv.reload() | |
| 451 | |
| 452 @pyqtSlot(int) | |
| 453 def __checkActionButtons(self, row): | |
| 454 """ | |
| 455 Private slot to set the enabled state of the action buttons. | |
| 456 | |
| 457 @param row index of the current page | |
| 458 @type int | |
| 459 """ | |
| 460 cv = self.currentViewer() | |
| 461 self.__backwardButton.setEnabled(cv and cv.isBackwardAvailable()) | |
| 462 self.__forwardButton.setEnabled(cv and cv.isForwardAvailable()) | |
| 463 | |
| 464 def __showBackMenu(self): | |
| 465 """ | |
| 466 Private slot showing the backward navigation menu. | |
| 467 """ | |
| 468 cv = self.currentViewer() | |
| 469 if cv: | |
| 470 self.__backMenu.clear() | |
| 471 backwardHistoryCount = max(cv.backwardHistoryCount(), 20) | |
| 472 # show max. 20 items | |
| 473 | |
| 474 for index in range(1, backwardHistoryCount + 1): | |
| 475 act = QAction(self) | |
| 476 act.setData(-index) | |
| 477 act.setText(cv.historyTitle(-index)) | |
| 478 self.__backMenu.addAction(act) | |
| 479 | |
| 480 self.__backMenu.addSeparator() | |
| 481 self.__backMenu.addAction(self.tr("Clear History"), | |
| 482 self.__clearHistory) | |
| 483 | |
| 484 def __showForwardMenu(self): | |
| 485 """ | |
| 486 Private slot showing the forward navigation menu. | |
| 487 """ | |
| 488 cv = self.currentViewer() | |
| 489 if cv: | |
| 490 self.__forwardMenu.clear() | |
| 491 forwardHistoryCount = max(cv.forwardHistoryCount(), 20) | |
| 492 # show max. 20 items | |
| 493 | |
| 494 for index in range(1, forwardHistoryCount + 1): | |
| 495 act = QAction(self) | |
| 496 act.setData(index) | |
| 497 act.setText(cv.historyTitle(index)) | |
| 498 self.__forwardMenu.addAction(act) | |
| 499 | |
| 500 self.__forwardMenu.addSeparator() | |
| 501 self.__forwardMenu.addAction(self.tr("Clear History"), | |
| 502 self.__clearHistory) | |
| 503 | |
| 504 def __navigationMenuActionTriggered(self, act): | |
| 505 """ | |
| 506 Private slot to go to the selected page. | |
| 507 | |
| 508 @param act reference to the action selected in the navigation menu | |
| 509 @type QAction | |
| 510 """ | |
| 511 cv = self.currentViewer() | |
| 512 if cv: | |
| 513 index = act.data() | |
| 514 cv.gotoHistory(index) | |
| 515 | |
| 516 def __clearHistory(self): | |
| 517 """ | |
| 518 Private slot to clear the history of the current viewer. | |
| 519 """ | |
| 520 cb = self.__mw.currentBrowser() | |
| 521 if cb is not None: | |
| 522 cb.history().clear() | |
| 523 self.__mw.setForwardAvailable(cb.isForwardAvailable()) | |
| 524 self.__mw.setBackwardAvailable(cb.isBackwardAvailable()) |
