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#!/usr/bin/env python
from PyQt4 import QtCore, QtGui, QtXmlPatterns
import schema_rc
from ui_schema import Ui_SchemaMainWindow
try:
# Python v2.
unicode
def encode_utf8(ba):
return unicode(ba, encoding='utf8')
def decode_utf8(qs):
return qs.toUtf8()
except NameError:
# Python v3.
def encode_utf8(ba):
return str(ba, encoding='utf8')
def decode_utf8(qs):
return QtCore.QByteArray(bytes(qs, encoding='utf8'))
class XmlSyntaxHighlighter(QtGui.QSyntaxHighlighter):
def __init__(self, parent=None):
super(XmlSyntaxHighlighter, self).__init__(parent)
self.highlightingRules = []
# Tag format.
format = QtGui.QTextCharFormat()
format.setForeground(QtCore.Qt.darkBlue)
format.setFontWeight(QtGui.QFont.Bold)
pattern = QtCore.QRegExp("(<[a-zA-Z:]+\\b|<\\?[a-zA-Z:]+\\b|\\?>|>|/>|</[a-zA-Z:]+>)")
self.highlightingRules.append((pattern, format))
# Attribute format.
format = QtGui.QTextCharFormat()
format.setForeground(QtCore.Qt.darkGreen)
pattern = QtCore.QRegExp("[a-zA-Z:]+=")
self.highlightingRules.append((pattern, format))
# Attribute content format.
format = QtGui.QTextCharFormat()
format.setForeground(QtCore.Qt.red)
pattern = QtCore.QRegExp("(\"[^\"]*\"|'[^']*')")
self.highlightingRules.append((pattern, format))
# Comment format.
self.commentFormat = QtGui.QTextCharFormat()
self.commentFormat.setForeground(QtCore.Qt.lightGray)
self.commentFormat.setFontItalic(True)
self.commentStartExpression = QtCore.QRegExp("<!--")
self.commentEndExpression = QtCore.QRegExp("-->")
def highlightBlock(self, text):
for pattern, format in self.highlightingRules:
expression = QtCore.QRegExp(pattern)
index = expression.indexIn(text)
while index >= 0:
length = expression.matchedLength()
self.setFormat(index, length, format)
index = expression.indexIn(text, index + length)
self.setCurrentBlockState(0)
startIndex = 0
if self.previousBlockState() != 1:
startIndex = self.commentStartExpression.indexIn(text)
while startIndex >= 0:
endIndex = self.commentEndExpression.indexIn(text, startIndex)
if endIndex == -1:
self.setCurrentBlockState(1)
commentLength = text.length() - startIndex
else:
commentLength = endIndex - startIndex + self.commentEndExpression.matchedLength()
self.setFormat(startIndex, commentLength, self.commentFormat)
startIndex = self.commentStartExpression.indexIn(text,
startIndex + commentLength)
class MessageHandler(QtXmlPatterns.QAbstractMessageHandler):
def __init__(self):
super(MessageHandler, self).__init__()
self.m_description = ""
self.m_sourceLocation = QtXmlPatterns.QSourceLocation()
def statusMessage(self):
return self.m_description
def line(self):
return self.m_sourceLocation.line()
def column(self):
return self.m_sourceLocation.column()
def handleMessage(self, type, description, identifier, sourceLocation):
self.m_description = description
self.m_sourceLocation = sourceLocation
class MainWindow(QtGui.QMainWindow, Ui_SchemaMainWindow):
def __init__(self):
QtGui.QMainWindow.__init__(self)
self.setupUi(self)
XmlSyntaxHighlighter(self.schemaView.document())
XmlSyntaxHighlighter(self.instanceEdit.document())
self.schemaSelection.addItem("Contact Schema")
self.schemaSelection.addItem("Recipe Schema")
self.schemaSelection.addItem("Order Schema")
self.instanceSelection.addItem("Valid Contact Instance")
self.instanceSelection.addItem("Invalid Contact Instance")
self.schemaSelection.currentIndexChanged.connect(self.schemaSelected)
self.instanceSelection.currentIndexChanged.connect(self.instanceSelected)
self.validateButton.clicked.connect(self.validate)
self.instanceEdit.textChanged.connect(self.textChanged)
self.validationStatus.setAlignment(QtCore.Qt.AlignCenter | QtCore.Qt.AlignVCenter)
self.schemaSelected(0)
self.instanceSelected(0)
def schemaSelected(self, index):
self.instanceSelection.clear()
if index == 0:
self.instanceSelection.addItem("Valid Contact Instance")
self.instanceSelection.addItem("Invalid Contact Instance")
elif index == 1:
self.instanceSelection.addItem("Valid Recipe Instance")
self.instanceSelection.addItem("Invalid Recipe Instance")
elif index == 2:
self.instanceSelection.addItem("Valid Order Instance")
self.instanceSelection.addItem("Invalid Order Instance")
self.textChanged()
schemaFile = QtCore.QFile(':/schema_%d.xsd' % index)
schemaFile.open(QtCore.QIODevice.ReadOnly)
schemaData = schemaFile.readAll()
self.schemaView.setPlainText(encode_utf8(schemaData))
self.validate()
def instanceSelected(self, index):
index += 2 * self.schemaSelection.currentIndex()
instanceFile = QtCore.QFile(':/instance_%d.xml' % index)
instanceFile.open(QtCore.QIODevice.ReadOnly)
instanceData = instanceFile.readAll()
self.instanceEdit.setPlainText(encode_utf8(instanceData))
self.validate()
def validate(self):
schemaData = decode_utf8(self.schemaView.toPlainText())
instanceData = decode_utf8(self.instanceEdit.toPlainText())
messageHandler = MessageHandler()
schema = QtXmlPatterns.QXmlSchema()
schema.setMessageHandler(messageHandler)
schema.load(schemaData)
errorOccurred = False
if not schema.isValid():
errorOccurred = True
else:
validator = QtXmlPatterns.QXmlSchemaValidator(schema)
if not validator.validate(instanceData):
errorOccurred = True
if errorOccurred:
self.validationStatus.setText(messageHandler.statusMessage())
self.moveCursor(messageHandler.line(), messageHandler.column())
background = QtCore.Qt.red
else:
self.validationStatus.setText("validation successful")
background = QtCore.Qt.green
styleSheet = 'QLabel {background: %s; padding: 3px}' % QtGui.QColor(background).light(160).name()
self.validationStatus.setStyleSheet(styleSheet)
def textChanged(self):
self.instanceEdit.setExtraSelections([])
def moveCursor(self, line, column):
self.instanceEdit.moveCursor(QtGui.QTextCursor.Start)
for i in range(1, line):
self.instanceEdit.moveCursor(QtGui.QTextCursor.Down)
for i in range(1, column):
self.instanceEdit.moveCursor(QtGui.QTextCursor.Right)
extraSelections = []
selection = QtGui.QTextEdit.ExtraSelection()
lineColor = QtGui.QColor(QtCore.Qt.red).lighter(160)
selection.format.setBackground(lineColor)
selection.format.setProperty(QtGui.QTextFormat.FullWidthSelection, True)
selection.cursor = self.instanceEdit.textCursor()
selection.cursor.clearSelection()
extraSelections.append(selection)
self.instanceEdit.setExtraSelections(extraSelections)
self.instanceEdit.setFocus()
if __name__ == '__main__':
import sys
app = QtGui.QApplication(sys.argv)
window = MainWindow()
window.show()
sys.exit(app.exec_())
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