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1 # -*- test-case-name: twisted.web.test.test_woven -*- | |
2 | |
3 __version__ = "$Revision: 1.13 $"[11:-2] | |
4 | |
5 from zope.interface import Interface | |
6 | |
7 class IModel(Interface): | |
8 """A MVC Model.""" | |
9 def addView(view): | |
10 """Add a view for the model to keep track of. | |
11 """ | |
12 | |
13 def removeView(view): | |
14 """Remove a view that the model no longer should keep track of. | |
15 """ | |
16 | |
17 def notify(changed=None): | |
18 """Notify all views that something was changed on me. | |
19 Passing a dictionary of {'attribute': 'new value'} in changed | |
20 will pass this dictionary to the view for increased performance. | |
21 If you don't want to do this, don't, and just use the traditional | |
22 MVC paradigm of querying the model for things you're interested | |
23 in. | |
24 """ | |
25 | |
26 def getData(): | |
27 """Return the raw data contained by this Model object, if it is a | |
28 wrapper. If not, return self. | |
29 """ | |
30 | |
31 def setData(request, data): | |
32 """Set the raw data referenced by this Model object, if it is a | |
33 wrapper. This is done by telling our Parent model to setSubmodel | |
34 the new data. If this object is not a wrapper, keep the data | |
35 around and return it for subsequent getData calls. | |
36 """ | |
37 | |
38 def lookupSubmodel(request, submodelPath): | |
39 """Return an IModel implementor for the given submodel path | |
40 string. This path may be any number of elements separated | |
41 by /. The default implementation splits on "/" and calls | |
42 getSubmodel until the path is exhausted. You will not normally | |
43 need to override this behavior. | |
44 """ | |
45 | |
46 def getSubmodel(request, submodelName): | |
47 """Return an IModel implementor for the submodel named | |
48 "submodelName". If this object contains simple data types, | |
49 they can be adapted to IModel using | |
50 model.adaptToIModel(m, parent, name) before returning. | |
51 """ | |
52 | |
53 def setSubmodel(request, submodelName, data): | |
54 """Set the given data as a submodel of this model. The data | |
55 need not implement IModel, since getSubmodel should adapt | |
56 the data to IModel before returning it. | |
57 """ | |
58 | |
59 | |
60 class IView(Interface): | |
61 """A MVC View""" | |
62 def __init__(model, controller=None): | |
63 """A view must be told what its model is, and may be told what its | |
64 controller is, but can also look up its controller if none specified. | |
65 """ | |
66 | |
67 def modelChanged(changed): | |
68 """Dispatch changed messages to any update_* methods which | |
69 may have been defined, then pass the update notification on | |
70 to the controller. | |
71 """ | |
72 | |
73 def controllerFactory(): | |
74 """Hook for subclasses to customize the controller that is associated | |
75 with the model associated with this view. | |
76 | |
77 Default behavior: Look up a component that implements IController | |
78 for the self.model instance. | |
79 """ | |
80 | |
81 def setController(controller): | |
82 """Set the controller that this view is related to.""" | |
83 | |
84 def importViewLibrary(moduleOrObject): | |
85 """Import the given object or module into this View's view namespace | |
86 stack. If the given object or module has a getSubview function or | |
87 method, it will be called when a node has a view="foo" attribute. | |
88 If no getSubview method is defined, a default one will be provided | |
89 which looks for the literal name in the namespace. | |
90 """ | |
91 | |
92 def getSubview(request, node, model, viewName): | |
93 """Look for a view named "viewName" to handle the node "node". | |
94 When a node <div view="foo" /> is present in the template, this | |
95 method will be called with viewName set to "foo". | |
96 | |
97 Return None if this View doesn't want to provide a Subview for | |
98 the given name. | |
99 """ | |
100 | |
101 def setSubviewFactory(name, factory, setup=None): | |
102 """Set the callable "factory", which takes a model and should | |
103 return a Widget, to be called by the default implementation of | |
104 getSubview when the viewName "name" is present in the template. | |
105 | |
106 This would generally be used like this: | |
107 | |
108 view.setSubviewFactory("foo", MyFancyWidgetClass) | |
109 | |
110 This is equivalent to:: | |
111 | |
112 def wvfactory_foo(self, request, node, m): | |
113 return MyFancyWidgetClass(m) | |
114 | |
115 Which will cause an instance of MyFancyWidgetClass to be | |
116 instanciated when template node <div view="foo" /> is encountered. | |
117 | |
118 If setup is passed, it will be passed to new instances returned | |
119 from this factory as a setup method. The setup method is called | |
120 each time the Widget is generated. Setup methods take (request, | |
121 widget, model) as arguments. | |
122 | |
123 This is equivalent to:: | |
124 | |
125 def wvupdate_foo(self, request, widget, model): | |
126 # whatever you want | |
127 """ | |
128 | |
129 def __adapt__(adaptable, default): | |
130 if hasattr(adaptable, 'original'): | |
131 return IView(adaptable.original, default) | |
132 return default | |
133 | |
134 | |
135 class IController(Interface): | |
136 """A MVC Controller""" | |
137 def setView(view): | |
138 """Set the view that this controller is related to. | |
139 """ | |
140 | |
141 def importControllerLibrary(moduleOrObject): | |
142 """Import the given object or module into this Controllers's | |
143 controller namespace stack. If the given object or module has a | |
144 getSubcontroller function or method, it will be called when a node | |
145 has a controller="foo" attribute. If no getSubcontroller method is | |
146 defined, a default one will be provided which looks for the literal | |
147 name in the namespace. | |
148 """ | |
149 | |
150 def getSubcontroller(request, node, model, controllerName): | |
151 """Look for a controller named "controllerName" to handle the node | |
152 "node". When a node <div controller="foo" /> is present in the | |
153 template, this method will be called with controllerName set to "foo". | |
154 | |
155 Return None if this Controller doesn't want to provide a Subcontroller | |
156 for the given name. | |
157 """ | |
158 | |
159 def setSubcontrollerFactory(name, factory): | |
160 """Set the callable "factory", which takes a model and should | |
161 return an InputHandler, to be called by the default implementation of | |
162 getSubview when the controllerName "name" is present in the template. | |
163 | |
164 This would generally be used like this:: | |
165 | |
166 view.setSubcontrollerFactory("foo", MyFancyInputHandlerClass) | |
167 | |
168 This is equivalent to:: | |
169 | |
170 def wcfactory_foo(self, request, node, m): | |
171 return MyFancyInputHandlerClass(m) | |
172 | |
173 Which will cause an instance of MyFancyInputHandlerClass to be | |
174 instanciated when template node <div controller="foo" /> is | |
175 encountered. | |
176 """ | |
177 | |
178 def __adapt__(adaptable, default): | |
179 if hasattr(adaptable, 'original'): | |
180 return IController(adaptable.original, default) | |
181 return default | |
182 | |
183 | |
184 class IWovenLivePage(Interface): | |
185 def getCurrentPage(): | |
186 """Return the current page object contained in this session. | |
187 """ | |
188 | |
189 def setCurrentPage(page): | |
190 """Set the current page object contained in this session. | |
191 """ | |
192 | |
193 def sendJavaScript(js): | |
194 """Send "js" to the live page's persistent output conduit for | |
195 execution in the browser. If there is no conduit connected yet, | |
196 save the js and write it as soon as the output conduit is | |
197 connected. | |
198 """ | |
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