Mercurial Repositories > eric / file comparison
comparison: UI/Previewers/PreviewerHTML.py
UI/Previewers/PreviewerHTML.py
- branch
- 6_1_x
- changeset 4849
- 4eb0fba3b6c5
- parent 4632
- ca310db386ed
- child 4930
- 53c81938e911
equal
deleted
inserted
replaced
| 4848:36b1d9bec8f6 | 4849:4eb0fba3b6c5 |
|---|---|
| 20 import shutil | 20 import shutil |
| 21 import tempfile | 21 import tempfile |
| 22 import sys | 22 import sys |
| 23 | 23 |
| 24 from PyQt5.QtCore import pyqtSlot, pyqtSignal, Qt, QUrl, QSize, QThread | 24 from PyQt5.QtCore import pyqtSlot, pyqtSignal, Qt, QUrl, QSize, QThread |
| 25 from PyQt5.QtWidgets import QWidget | 25 from PyQt5.QtWidgets import QWidget, QVBoxLayout, QLabel, QCheckBox, \ |
| 26 from PyQt5.QtWebKitWidgets import QWebPage | 26 QSizePolicy |
| 27 | 27 |
| 28 from E5Gui.E5Application import e5App | 28 from E5Gui.E5Application import e5App |
| 29 | |
| 30 from .Ui_PreviewerHTML import Ui_PreviewerHTML | |
| 31 | 29 |
| 32 import Utilities | 30 import Utilities |
| 33 import Preferences | 31 import Preferences |
| 34 | 32 |
| 35 | 33 |
| 36 class PreviewerHTML(QWidget, Ui_PreviewerHTML): | 34 class PreviewerHTML(QWidget): |
| 37 """ | 35 """ |
| 38 Class implementing a previewer widget for HTML, Markdown and ReST files. | 36 Class implementing a previewer widget for HTML, Markdown and ReST files. |
| 39 """ | 37 """ |
| 40 def __init__(self, parent=None): | 38 def __init__(self, parent=None): |
| 41 """ | 39 """ |
| 42 Constructor | 40 Constructor |
| 43 | 41 |
| 44 @param parent reference to the parent widget (QWidget) | 42 @param parent reference to the parent widget (QWidget) |
| 45 """ | 43 """ |
| 46 super(PreviewerHTML, self).__init__(parent) | 44 super(PreviewerHTML, self).__init__(parent) |
| 47 self.setupUi(self) | 45 |
| 46 self.__layout = QVBoxLayout(self) | |
| 47 | |
| 48 self.titleLabel = QLabel(self) | |
| 49 self.titleLabel.setWordWrap(True) | |
| 50 self.titleLabel.setTextInteractionFlags(Qt.NoTextInteraction) | |
| 51 self.__layout.addWidget(self.titleLabel) | |
| 52 | |
| 53 try: | |
| 54 from PyQt5.QtWebKitWidgets import QWebPage, QWebView | |
| 55 self.previewView = QWebView(self) | |
| 56 self.previewView.page().setLinkDelegationPolicy( | |
| 57 QWebPage.DelegateAllLinks) | |
| 58 self.__usesWebKit = True | |
| 59 except ImportError: | |
| 60 from PyQt5.QtWebEngineWidgets import QWebEngineView | |
| 61 self.previewView = QWebEngineView(self) | |
| 62 self.__usesWebKit = False | |
| 63 | |
| 64 sizePolicy = QSizePolicy(QSizePolicy.Preferred, QSizePolicy.Expanding) | |
| 65 sizePolicy.setHorizontalStretch(0) | |
| 66 sizePolicy.setVerticalStretch(0) | |
| 67 sizePolicy.setHeightForWidth( | |
| 68 self.previewView.sizePolicy().hasHeightForWidth()) | |
| 69 self.previewView.setSizePolicy(sizePolicy) | |
| 70 self.previewView.setContextMenuPolicy(Qt.NoContextMenu) | |
| 71 self.previewView.setUrl(QUrl("about:blank")) | |
| 72 self.__layout.addWidget(self.previewView) | |
| 73 | |
| 74 self.jsCheckBox = QCheckBox(self.tr("Enable JavaScript"), self) | |
| 75 self.jsCheckBox.setToolTip(self.tr( | |
| 76 "Select to enable JavaScript for HTML previews")) | |
| 77 self.__layout.addWidget(self.jsCheckBox) | |
| 78 | |
| 79 self.ssiCheckBox = QCheckBox(self.tr("Enable Server Side Includes"), | |
| 80 self) | |
| 81 self.ssiCheckBox.setToolTip(self.tr( | |
| 82 "Select to enable support for Server Side Includes")) | |
| 83 self.__layout.addWidget(self.ssiCheckBox) | |
| 84 | |
| 85 self.jsCheckBox.clicked[bool].connect(self.on_jsCheckBox_clicked) | |
| 86 self.ssiCheckBox.clicked[bool].connect(self.on_ssiCheckBox_clicked) | |
| 87 self.previewView.titleChanged.connect(self.on_previewView_titleChanged) | |
| 88 if self.__usesWebKit: | |
| 89 self.previewView.linkClicked.connect( | |
| 90 self.on_previewView_linkClicked) | |
| 48 | 91 |
| 49 self.jsCheckBox.setChecked( | 92 self.jsCheckBox.setChecked( |
| 50 Preferences.getUI("ShowFilePreviewJS")) | 93 Preferences.getUI("ShowFilePreviewJS")) |
| 51 self.ssiCheckBox.setChecked( | 94 self.ssiCheckBox.setChecked( |
| 52 Preferences.getUI("ShowFilePreviewSSI")) | 95 Preferences.getUI("ShowFilePreviewSSI")) |
| 53 | |
| 54 self.previewView.page().setLinkDelegationPolicy( | |
| 55 QWebPage.DelegateAllLinks) | |
| 56 | 96 |
| 57 self.__scrollBarPositions = {} | 97 self.__scrollBarPositions = {} |
| 58 self.__vScrollBarAtEnd = {} | 98 self.__vScrollBarAtEnd = {} |
| 59 self.__hScrollBarAtEnd = {} | 99 self.__hScrollBarAtEnd = {} |
| 60 | 100 |
| 156 positions. | 196 positions. |
| 157 | 197 |
| 158 @param filePath file path of the previewed editor (string) | 198 @param filePath file path of the previewed editor (string) |
| 159 @param html processed HTML text ready to be shown (string) | 199 @param html processed HTML text ready to be shown (string) |
| 160 """ | 200 """ |
| 161 self.__saveScrollBarPositions() | |
| 162 self.__previewedPath = Utilities.normcasepath( | 201 self.__previewedPath = Utilities.normcasepath( |
| 163 Utilities.fromNativeSeparators(filePath)) | 202 Utilities.fromNativeSeparators(filePath)) |
| 164 self.previewView.page().mainFrame().contentsSizeChanged.connect( | 203 self.__saveScrollBarPositions() |
| 165 self.__restoreScrollBarPositions) | 204 if self.__usesWebKit: |
| 205 self.previewView.page().mainFrame().contentsSizeChanged.connect( | |
| 206 self.__restoreScrollBarPositions) | |
| 207 else: | |
| 208 self.previewView.page().loadFinished.connect( | |
| 209 self.__restoreScrollBarPositions) | |
| 166 self.previewView.setHtml(html, baseUrl=QUrl.fromLocalFile(filePath)) | 210 self.previewView.setHtml(html, baseUrl=QUrl.fromLocalFile(filePath)) |
| 167 | 211 |
| 168 @pyqtSlot(str) | 212 @pyqtSlot(str) |
| 169 def on_previewView_titleChanged(self, title): | 213 def on_previewView_titleChanged(self, title): |
| 170 """ | 214 """ |
| 179 | 223 |
| 180 def __saveScrollBarPositions(self): | 224 def __saveScrollBarPositions(self): |
| 181 """ | 225 """ |
| 182 Private method to save scroll bar positions for a previewed editor. | 226 Private method to save scroll bar positions for a previewed editor. |
| 183 """ | 227 """ |
| 184 frame = self.previewView.page().mainFrame() | 228 if self.__usesWebKit: |
| 185 if frame.contentsSize() == QSize(0, 0): | 229 frame = self.previewView.page().mainFrame() |
| 186 return # no valid data, nothing to save | 230 if frame.contentsSize() == QSize(0, 0): |
| 187 | 231 return # no valid data, nothing to save |
| 188 pos = frame.scrollPosition() | 232 |
| 189 self.__scrollBarPositions[self.__previewedPath] = pos | 233 pos = frame.scrollPosition() |
| 190 self.__hScrollBarAtEnd[self.__previewedPath] = \ | 234 self.__scrollBarPositions[self.__previewedPath] = pos |
| 191 frame.scrollBarMaximum(Qt.Horizontal) == pos.x() | 235 self.__hScrollBarAtEnd[self.__previewedPath] = \ |
| 192 self.__vScrollBarAtEnd[self.__previewedPath] = \ | 236 frame.scrollBarMaximum(Qt.Horizontal) == pos.x() |
| 193 frame.scrollBarMaximum(Qt.Vertical) == pos.y() | 237 self.__vScrollBarAtEnd[self.__previewedPath] = \ |
| 238 frame.scrollBarMaximum(Qt.Vertical) == pos.y() | |
| 239 else: | |
| 240 from PyQt5.QtCore import QPoint | |
| 241 pos = self.__execJavaScript( | |
| 242 "(function() {" | |
| 243 "var res = {" | |
| 244 " x: 0," | |
| 245 " y: 0," | |
| 246 "};" | |
| 247 "res.x = window.scrollX;" | |
| 248 "res.y = window.scrollY;" | |
| 249 "return res;" | |
| 250 "})()" | |
| 251 ) | |
| 252 pos = QPoint(pos["x"], pos["y"]) | |
| 253 self.__scrollBarPositions[self.__previewedPath] = pos | |
| 254 self.__hScrollBarAtEnd[self.__previewedPath] = False | |
| 255 self.__vScrollBarAtEnd[self.__previewedPath] = False | |
| 194 | 256 |
| 195 def __restoreScrollBarPositions(self): | 257 def __restoreScrollBarPositions(self): |
| 196 """ | 258 """ |
| 197 Private method to restore scroll bar positions for a previewed editor. | 259 Private method to restore scroll bar positions for a previewed editor. |
| 198 """ | 260 """ |
| 199 try: | 261 if self.__usesWebKit: |
| 200 self.previewView.page().mainFrame().contentsSizeChanged.disconnect( | 262 try: |
| 201 self.__restoreScrollBarPositions) | 263 self.previewView.page().mainFrame().contentsSizeChanged.\ |
| 202 except TypeError: | 264 disconnect(self.__restoreScrollBarPositions) |
| 203 # not connected, simply ignore it | 265 except TypeError: |
| 204 pass | 266 # not connected, simply ignore it |
| 205 | 267 pass |
| 206 if self.__previewedPath not in self.__scrollBarPositions: | 268 |
| 207 return | 269 if self.__previewedPath not in self.__scrollBarPositions: |
| 208 | 270 return |
| 209 frame = self.previewView.page().mainFrame() | 271 |
| 210 frame.setScrollPosition( | 272 frame = self.previewView.page().mainFrame() |
| 211 self.__scrollBarPositions[self.__previewedPath]) | 273 frame.setScrollPosition( |
| 212 | 274 self.__scrollBarPositions[self.__previewedPath]) |
| 213 if self.__hScrollBarAtEnd[self.__previewedPath]: | 275 |
| 214 frame.setScrollBarValue( | 276 if self.__hScrollBarAtEnd[self.__previewedPath]: |
| 215 Qt.Horizontal, frame.scrollBarMaximum(Qt.Horizontal)) | 277 frame.setScrollBarValue( |
| 216 | 278 Qt.Horizontal, frame.scrollBarMaximum(Qt.Horizontal)) |
| 217 if self.__vScrollBarAtEnd[self.__previewedPath]: | 279 |
| 218 frame.setScrollBarValue( | 280 if self.__vScrollBarAtEnd[self.__previewedPath]: |
| 219 Qt.Vertical, frame.scrollBarMaximum(Qt.Vertical)) | 281 frame.setScrollBarValue( |
| 282 Qt.Vertical, frame.scrollBarMaximum(Qt.Vertical)) | |
| 283 else: | |
| 284 if self.__previewedPath not in self.__scrollBarPositions: | |
| 285 return | |
| 286 | |
| 287 pos = self.__scrollBarPositions[self.__previewedPath] | |
| 288 self.previewView.page().runJavaScript( | |
| 289 "window.scrollTo({0}, {1});".format(pos.x(), pos.y())) | |
| 220 | 290 |
| 221 @pyqtSlot(QUrl) | 291 @pyqtSlot(QUrl) |
| 222 def on_previewView_linkClicked(self, url): | 292 def on_previewView_linkClicked(self, url): |
| 223 """ | 293 """ |
| 224 Private slot handling the clicking of a link. | 294 Private slot handling the clicking of a link. |
| 225 | 295 |
| 226 @param url url of the clicked link (QUrl) | 296 @param url url of the clicked link (QUrl) |
| 227 """ | 297 """ |
| 228 e5App().getObject("UserInterface").launchHelpViewer(url.toString()) | 298 e5App().getObject("UserInterface").launchHelpViewer(url.toString()) |
| 299 | |
| 300 def __execJavaScript(self, script): | |
| 301 """ | |
| 302 Private function to execute a JavaScript function Synchroneously. | |
| 303 | |
| 304 @param script JavaScript script source to be executed | |
| 305 @type str | |
| 306 @return result of the script | |
| 307 @rtype depending upon script result | |
| 308 """ | |
| 309 from PyQt5.QtCore import QEventLoop | |
| 310 loop = QEventLoop() | |
| 311 resultDict = {"res": None} | |
| 312 | |
| 313 def resultCallback(res, resDict=resultDict): | |
| 314 if loop and loop.isRunning(): | |
| 315 resDict["res"] = res | |
| 316 loop.quit() | |
| 317 | |
| 318 self.previewView.page().runJavaScript( | |
| 319 script, resultCallback) | |
| 320 | |
| 321 loop.exec_() | |
| 322 return resultDict["res"] | |
| 229 | 323 |
| 230 | 324 |
| 231 class PreviewProcessingThread(QThread): | 325 class PreviewProcessingThread(QThread): |
| 232 """ | 326 """ |
| 233 Class implementing a thread to process some text into HTML usable by the | 327 Class implementing a thread to process some text into HTML usable by the |
