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@@ -27,6 +27,7 @@ from direct.stdpy import file
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from direct.task.TaskManagerGlobal import taskMgr
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from direct.showbase import AppRunnerGlobal
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import os
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+import types
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import __builtin__
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MultifileRoot = '/mf'
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@@ -41,10 +42,10 @@ default-model-extension .bam
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class ArgumentError(AttributeError):
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pass
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-class ScriptRoot:
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+class ScriptAttributes:
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""" This dummy class serves as the root object for the scripting
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interface. The Python code can store objects and functions here
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- for direct meddling by the browser's JavaScript code. """
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+ for direct inspection by the browser's JavaScript code. """
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pass
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class AppRunner(DirectObject):
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@@ -57,15 +58,23 @@ class AppRunner(DirectObject):
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self.started = False
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self.windowPrc = None
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+ # Store this Null instance where the application can easily
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+ # get to it.
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+ self.Null = Null
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+
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# This is per session.
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self.nextScriptId = 0
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# TODO: we need one of these per instance, not per session.
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self.instanceId = None
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- self.scriptRoot = ScriptRoot()
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- # This will be the browser's toplevel window DOM object.
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- self.window = None
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+ # The attributes of this object will be exposed as attributes
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+ # of the plugin instance in the DOM.
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+ self.attributes = ScriptAttributes()
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+
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+ # This will be the browser's toplevel window DOM object;
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+ # e.g. self.dom.document will be the document.
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+ self.dom = None
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# This is the default requestFunc that is installed if we
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# never call setRequestFunc().
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@@ -151,13 +160,20 @@ class AppRunner(DirectObject):
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if hasattr(main, 'main') and callable(main.main):
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main.main()
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- def setBrowserScriptObject(self, window):
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- """ Replaces self.window with the browser's toplevel DOM
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+ def getPandaScriptObject(self):
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+ """ Called by the browser to query the Panda instance's
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+ toplevel scripting object, for querying properties in the
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+ Panda instance. The attributes on this object are mapped to
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+ the plugin instance within the DOM. """
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+ return self.attributes
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+
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+ def setBrowserScriptObject(self, dom):
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+ """ Called by the browser to supply the browser's toplevel DOM
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object, for controlling the JavaScript and the document in the
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same page with the Panda3D plugin. """
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- self.window = window
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- print "setBrowserScriptObject(%s)" % (window)
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+ self.dom = dom
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+ print "setBrowserScriptObject(%s)" % (dom)
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def setP3DFilename(self, p3dFilename, tokens = [],
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instanceId = None):
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@@ -166,7 +182,7 @@ class AppRunner(DirectObject):
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# for this instance.
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self.instanceId = instanceId
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- # Now that we have an instanceId, we can response to queries
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+ # Now that we have an instanceId, we can respond to queries
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# and such.
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self.sendRequest('notify', 'onpythonload')
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@@ -266,8 +282,6 @@ class AppRunner(DirectObject):
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return self.requestFunc(self.instanceId, request, args)
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def windowEvent(self, win):
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- print "Got window event in runp3d"
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-
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self.sendRequest('notify', 'onwindowopen')
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def scriptRequest(self, operation, object, propertyName = None,
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@@ -297,7 +311,6 @@ class AppRunner(DirectObject):
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# Now wait for the response to come in.
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result = self.sendRequest('wait_script_response', uniqueId)
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- print "result for %s.%s = %s" % (object, propertyName, result,)
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return result
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def parseSysArgs(self):
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@@ -332,6 +345,16 @@ class AppRunner(DirectObject):
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return (osFilename, tokens)
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+class NullObject:
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+ """ This is a special object that is returned by the browser to
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+ represent a NULL pointer, typically the return value for a failed
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+ operation. It has no attributes. """
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+ pass
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+
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+# In fact, we normally always return this precise instance of the
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+# NullObject.
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+Null = NullObject()
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+
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class BrowserObject:
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""" This class provides the Python wrapper around some object that
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actually exists in the plugin host's namespace, e.g. a JavaScript
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@@ -348,25 +371,27 @@ class BrowserObject:
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return True
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def __getattr__(self, name):
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- """ Remaps attempts to query an attribute into the appropriate
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- calls to query the actual browser object under the hood. """
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+ """ Remaps attempts to query an attribute, as in obj.attr,
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+ into the appropriate calls to query the actual browser object
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+ under the hood. """
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- print "__getattr_(self, %s)" % (name)
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- print "runner = %s" % (self.__runner)
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value = self.__runner.scriptRequest('get_property', self,
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propertyName = name)
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+ if value is Null:
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+ # Failed to retrieve the attribute.
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+ raise AttributeError(name)
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+
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return value
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- # raise AttributeError(name)
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def __setattr__(self, name, value):
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if name in self.__dict__:
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self.__dict__[name] = value
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return
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- value = self.__runner.scriptRequest('set_property', self,
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- propertyName = name,
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- value = value)
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- if not value:
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+ result = self.__runner.scriptRequest('set_property', self,
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+ propertyName = name,
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+ value = value)
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+ if not result:
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raise AttributeError(name)
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def __delattr__(self, name):
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@@ -374,11 +399,50 @@ class BrowserObject:
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del self.__dict__[name]
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return
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- value = self.__runner.scriptRequest('del_property', self,
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- propertyName = name)
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- if not value:
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+ result = self.__runner.scriptRequest('del_property', self,
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+ propertyName = name)
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+ if not result:
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raise AttributeError(name)
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+ def __getitem__(self, key):
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+ """ Remaps attempts to query an attribute, as in obj['attr'],
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+ into the appropriate calls to query the actual browser object
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+ under the hood. Following the JavaScript convention, we treat
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+ obj['attr'] almost the same as obj.attr. """
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+
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+ value = self.__runner.scriptRequest('get_property', self,
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+ propertyName = str(key))
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+ if value is Null:
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+ # Failed to retrieve the property. We return IndexError
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+ # for numeric keys so we can properly support Python's
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+ # iterators, but we return KeyError for string keys to
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+ # emulate mapping objects.
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+ if isinstance(key, types.StringTypes):
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+ raise KeyError(key)
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+ else:
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+ raise IndexError(key)
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+
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+ return value;
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+
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+ def __setitem__(self, key, value):
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+ result = self.__runner.scriptRequest('set_property', self,
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+ propertyName = str(key),
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+ value = value)
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+ if not result:
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+ if isinstance(key, types.StringTypes):
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+ raise KeyError(key)
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+ else:
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+ raise IndexError(key)
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+
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+ def __delitem__(self, key):
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+ result = self.__runner.scriptRequest('del_property', self,
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+ propertyName = str(key))
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+ if not result:
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+ if isinstance(key, types.StringTypes):
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+ raise KeyError(key)
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+ else:
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+ raise IndexError(key)
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+
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if __name__ == '__main__':
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runner = AppRunner()
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runner.gotWindow = True
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David Rose