1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
|
#!/usr/bin/env python
#############################################################################
##
## Copyright (C) 2013 Riverbank Computing Limited.
## Copyright (C) 2016 The Qt Company Ltd.
## Contact: http://www.qt.io/licensing/
##
## This file is part of the Qt for Python examples of the Qt Toolkit.
##
## $QT_BEGIN_LICENSE:BSD$
## You may use this file under the terms of the BSD license as follows:
##
## "Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are
## met:
## * Redistributions of source code must retain the above copyright
## notice, this list of conditions and the following disclaimer.
## * Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in
## the documentation and/or other materials provided with the
## distribution.
## * Neither the name of The Qt Company Ltd nor the names of its
## contributors may be used to endorse or promote products derived
## from this software without specific prior written permission.
##
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
##
## $QT_END_LICENSE$
##
#############################################################################
from PySide2 import QtCore, QtGui, QtWidgets, 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 QtCore.QByteArray(str(qs))
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(QtWidgets.QMainWindow, Ui_SchemaMainWindow):
def __init__(self):
QtWidgets.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[int].connect(self.schemaSelected)
self.instanceSelection.currentIndexChanged[int].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):
if index is -1:
return
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, QtCore.QUrl())
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).lighter(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 = QtWidgets.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 = QtWidgets.QApplication(sys.argv)
window = MainWindow()
window.show()
sys.exit(app.exec_())
|
