161 lines
6.2 KiB
Python
161 lines
6.2 KiB
Python
"""
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src/bitmessageqt/messageview.py
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===============================
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"""
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from PyQt4 import QtCore, QtGui
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from safehtmlparser import SafeHTMLParser
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class MessageView(QtGui.QTextBrowser):
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"""Message content viewer class, can switch between plaintext and HTML"""
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MODE_PLAIN = 0
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MODE_HTML = 1
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def __init__(self, parent=0):
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super(MessageView, self).__init__(parent)
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self.mode = MessageView.MODE_PLAIN
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self.html = None
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self.setOpenExternalLinks(False)
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self.setOpenLinks(False)
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self.anchorClicked.connect(self.confirmURL)
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self.out = ""
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self.outpos = 0
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self.document().setUndoRedoEnabled(False)
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self.rendering = False
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self.defaultFontPointSize = self.currentFont().pointSize()
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self.verticalScrollBar().valueChanged.connect(self.lazyRender)
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self.setWrappingWidth()
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def resizeEvent(self, event):
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"""View resize event handler"""
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super(MessageView, self).resizeEvent(event)
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self.setWrappingWidth(event.size().width())
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def mousePressEvent(self, event):
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"""Mouse press button event handler"""
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if event.button() == QtCore.Qt.LeftButton and self.html and self.html.has_html and self.cursorForPosition(
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event.pos()).block().blockNumber() == 0:
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if self.mode == MessageView.MODE_PLAIN:
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self.showHTML()
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else:
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self.showPlain()
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else:
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super(MessageView, self).mousePressEvent(event)
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def wheelEvent(self, event):
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"""Mouse wheel scroll event handler"""
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# super will actually automatically take care of zooming
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super(MessageView, self).wheelEvent(event)
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if (QtGui.QApplication.queryKeyboardModifiers() &
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QtCore.Qt.ControlModifier) == QtCore.Qt.ControlModifier and event.orientation() == QtCore.Qt.Vertical:
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zoom = self.currentFont().pointSize() * 100 / self.defaultFontPointSize
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QtGui.QApplication.activeWindow().statusBar().showMessage(
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QtGui.QApplication.translate("MainWindow", "Zoom level %1%").arg(str(zoom)))
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def setWrappingWidth(self, width=None):
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"""Set word-wrapping width"""
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self.setLineWrapMode(QtGui.QTextEdit.FixedPixelWidth)
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if width is None:
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width = self.width()
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self.setLineWrapColumnOrWidth(width)
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def confirmURL(self, link):
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"""Show a dialog requesting URL opening confirmation"""
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if link.scheme() == "mailto":
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window = QtGui.QApplication.activeWindow()
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window.ui.lineEditTo.setText(link.path())
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if link.hasQueryItem("subject"):
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window.ui.lineEditSubject.setText(
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link.queryItemValue("subject"))
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if link.hasQueryItem("body"):
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window.ui.textEditMessage.setText(
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link.queryItemValue("body"))
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window.setSendFromComboBox()
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window.ui.tabWidgetSend.setCurrentIndex(0)
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window.ui.tabWidget.setCurrentIndex(
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window.ui.tabWidget.indexOf(window.ui.send)
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)
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window.ui.textEditMessage.setFocus()
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return
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reply = QtGui.QMessageBox.warning(
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self,
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QtGui.QApplication.translate(
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"MessageView",
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"Follow external link"),
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QtGui.QApplication.translate(
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"MessageView",
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"The link \"%1\" will open in a browser. It may be a security risk, it could de-anonymise you"
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" or download malicious data. Are you sure?").arg(unicode(link.toString())),
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QtGui.QMessageBox.Yes,
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QtGui.QMessageBox.No)
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if reply == QtGui.QMessageBox.Yes:
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QtGui.QDesktopServices.openUrl(link)
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def loadResource(self, restype, name):
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"""
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Callback for loading referenced objects, such as an image. For security reasons at the moment doesn't do
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anything)
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"""
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pass
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def lazyRender(self):
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"""
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Partially render a message. This is to avoid UI freezing when loading huge messages. It continues loading as
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you scroll down.
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"""
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if self.rendering:
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return
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self.rendering = True
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position = self.verticalScrollBar().value()
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cursor = QtGui.QTextCursor(self.document())
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while self.outpos < len(self.out) and self.verticalScrollBar().value(
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) >= self.document().size().height() - 2 * self.size().height():
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startpos = self.outpos
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self.outpos += 10240
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# find next end of tag
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if self.mode == MessageView.MODE_HTML:
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pos = self.out.find(">", self.outpos)
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if pos > self.outpos:
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self.outpos = pos + 1
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cursor.movePosition(QtGui.QTextCursor.End, QtGui.QTextCursor.MoveAnchor)
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cursor.insertHtml(QtCore.QString(self.out[startpos:self.outpos]))
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self.verticalScrollBar().setValue(position)
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self.rendering = False
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def showPlain(self):
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"""Render message as plain text."""
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self.mode = MessageView.MODE_PLAIN
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out = self.html.raw
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if self.html.has_html:
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out = "<div align=\"center\" style=\"text-decoration: underline;\"><b>" + unicode(
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QtGui.QApplication.translate(
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"MessageView", "HTML detected, click here to display")) + "</b></div><br/>" + out
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self.out = out
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self.outpos = 0
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self.setHtml("")
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self.lazyRender()
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def showHTML(self):
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"""Render message as HTML"""
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self.mode = MessageView.MODE_HTML
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out = self.html.sanitised
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out = "<div align=\"center\" style=\"text-decoration: underline;\"><b>" + unicode(
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QtGui.QApplication.translate("MessageView", "Click here to disable HTML")) + "</b></div><br/>" + out
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self.out = out
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self.outpos = 0
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self.setHtml("")
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self.lazyRender()
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def setContent(self, data):
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"""Set message content from argument"""
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self.html = SafeHTMLParser()
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self.html.reset()
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self.html.reset_safe()
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self.html.allow_picture = True
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self.html.feed(data)
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self.html.close()
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self.showPlain()
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