679e0eb9ca
git-svn-id: svn://10.0.0.236/branches/DOM_AGNOSTIC_BRANCH@181529 18797224-902f-48f8-a5cc-f745e15eee43
94 lines
3.2 KiB
Python
94 lines
3.2 KiB
Python
# This is vaguely related to an nsIScriptContext. The pydom C code
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# just calls back into this class - but that C code still retains some of the
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# functionality.
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import types, new
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import domcompile
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from xpcom.client import Component
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from xpcom import components, primitives, COMException
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class ScriptContext:
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def __init__(self):
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self._reset()
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def _reset(self):
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self._object_namespaces = {}
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self.globalObject = None
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self.globals = None
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def _getNamespaceFor(self, target, create = False):
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# Gets a 'namespace' for a DOM object. Used as a placeholder when
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# dynamic attributes are set on the object.
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try:
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return self._object_namespaces[target]
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except KeyError:
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if create:
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ret = {}
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self._object_namespaces[target] = ret
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return ret
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return None
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def GetNativeGlobal(self):
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return self.globals
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def InitContext(self, globalObject):
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self.globalObject = globalObject
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self.globals = {}
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if globalObject is not None:
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self.globals['this'] = Component(globalObject)
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self._object_namespaces = {}
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def FinalizeClasses(self, globalObject):
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self._reset()
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def ExecuteScript(self, scriptObject, scopeObject):
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assert scopeObject is None or scopeObject is self.globals, \
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"Global was changed??"
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if scopeObject is None:
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scopeObject = self.globals
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assert type(scopeObject)==dict, "expecting scope to be a dict!"
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assert type(scriptObject) == types.CodeType, \
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"Script object should be a code object (got %r)" % (scriptObject,)
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exec scriptObject in scopeObject
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def CompileScript(self, text, scopeObject, principal, url, lineno, version):
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return domcompile.compile(text, url, lineno=lineno)
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def CompileEventHandler(self, principal, name, argNames, body, url, lineno):
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co = domcompile.compile_function(body, url, name, argNames,
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lineno=lineno)
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g = {}
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exec co in g
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return g[name]
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def CallEventHandler(self, target, scope, handler, argv):
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target = Component(target)
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globs = self.globals.copy()
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globs['this'] = target # XXX - what should this be exposed as?
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# Although handler is already a function object, we must re-bind to
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# new globals
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f = new.function(handler.func_code, globs, handler.func_name)
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args = []
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for i in range(argv.length):
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val = argv.queryElementAt(i, components.interfaces.nsISupports)
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try:
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val = primitives.GetPrimitive(val)
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except COMException:
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pass
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args.append(val)
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args = tuple(args)
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return f(*args)
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def BindCompiledEventHandler(self, target, scope, name, handler):
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ns = self._getNamespaceFor(target, True)
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# Keeps a ref to both the target and handler!
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ns[name] = handler
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def GetBoundEventHandler(self, target, scope, name):
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ns = self._getNamespaceFor(target, True)
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if ns is None:
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return None
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return ns[name]
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