Remove qgsfunction from qgis.utils.

Import from qgis.core so we don't break API

python/utils.py

@@ -29,7 +29,7 @@
 """
 
 from PyQt4.QtCore import QCoreApplication, QLocale
-from qgis.core import QGis, QgsExpression, QgsMessageLog
+from qgis.core import QGis, QgsExpression, QgsMessageLog, qgsfunction
 from string import Template
 import sys
 import traceback
@@ -412,62 +412,6 @@ def closeProjectMacro():
         mod.closeProject()
 
 
-def qgsfunction(args, group, **kwargs):
-    """
-    Decorator function used to define a user expression function.
-
-    Custom functions should take (values, feature, parent) as args,
-    they can also shortcut naming feature and parent args by using *args
-    if they are not needed in the function.
-
-    Functions should return a value compatible with QVariant
-
-    Eval errors can be raised using parent.setEvalErrorString()
-
-    Functions must be unregistered when no longer needed using
-    QgsExpression.unregisterFunction
-
-    Example:
-      @qgsfunction(2, 'test'):
-      def add(values, feature, parent):
-        pass
-
-      Will create and register a function in QgsExpression called 'add' in the
-      'test' group that takes two arguments.
-
-      or not using feature and parent:
-
-      @qgsfunction(2, 'test'):
-      def add(values, *args):
-        pass
-    """
-    helptemplate = Template("""<h3>$name function</h3><br>$doc""")
-
-    class QgsExpressionFunction(QgsExpression.Function):
-        def __init__(self, name, args, group, helptext='', usesgeometry=False):
-            QgsExpression.Function.__init__(self, name, args, group, helptext, usesgeometry)
-
-        def func(self, values, feature, parent):
-            pass
-
-    def wrapper(func):
-        name = kwargs.get('name', func.__name__)
-        usesgeometry = kwargs.get('usesgeometry', False)
-        help = func.__doc__ or ''
-        help = help.strip()
-        if args == 0 and not name[0] == '$':
-            name = '${0}'.format(name)
-        func.__name__ = name
-        help = helptemplate.safe_substitute(name=name, doc=help)
-        f = QgsExpressionFunction(name, args, group, help, usesgeometry)
-        f.func = func
-        register = kwargs.get('register', True)
-        if register:
-            QgsExpression.registerFunction(f)
-        return f
-
-    return wrapper
-
 #######################
 # SERVER PLUGINS
 #