Rendering of document data (on view/node) depending on contentType

git-svn-id: svn://svn.cy55.de/Zope3/src/loops/trunk@1047 fd906abe-77d9-0310-91a1-e0d9ade77398

README.txt

@@ -347,6 +347,41 @@ A node object provides the targetSchema of its target:
   >>> IMediaAssetView.providedBy(m111)
   True
 
+A node's target is rendered using the NodeView's renderTargetBody()
+method. This makes use of a browser view registered for the target interface,
+and of a lot of other stuff needed for the rendering machine.
+
+  >>> from zope.app.publisher.interfaces.browser import IBrowserView
+  >>> from zope.publisher.interfaces.browser import IBrowserRequest
+  >>> from loops.browser.resource import DocumentView
+  >>> ztapi.provideAdapter(IDocument, Interface, DocumentView,
+  ...                      with=(IBrowserRequest,))
+
+  >>> from zope.component.interfaces import IFactory
+  >>> from zope.app.renderer import plaintext
+  >>> ztapi.provideUtility(IFactory, plaintext.PlainTextSourceFactory,
+  ...                      'zope.source.plaintext')
+  >>> ztapi.provideAdapter(plaintext.IPlainTextSource, Interface,
+  ...                      plaintext.PlainTextToHTMLRenderer,
+  ...                      with=(IBrowserRequest,))
+  >>> from zope.app.renderer import rest
+  >>> ztapi.provideUtility(IFactory, rest.ReStructuredTextSourceFactory,
+  ...                      'zope.source.rest')
+  >>> ztapi.provideAdapter(rest.IReStructuredTextSource, Interface,
+  ...                      rest.ReStructuredTextToHTMLRenderer,
+  ...                      with=(IBrowserRequest,))
+
+  >>> m112.target = doc1
+  >>> view = NodeView(m112, TestRequest())
+  >>> view.renderTargetBody()
+  u''
+  >>> doc1.data = u'Test data\n\nAnother paragraph'
+  >>> view.renderTargetBody()
+  u'Test data<br />\n<br />\nAnother paragraph'
+  >>> doc1.contentType = 'text/restructured'
+  >>> view.renderTargetBody()
+  u'<p>Test data</p>\n<p>Another paragraph</p>\n'
+
 It is possible to edit a target's attributes directly in an
 edit form provided by the node:
 
@@ -388,7 +423,7 @@ Let's add some more nodes and reorder them:
   ['m111', 'm112', 'm113', 'm114']
       
 A special management view provides methods for moving objects down, up,
-to the bottom, and to the top
+to the bottom, and to the top.
       
   >>> from cybertools.container.ordered import OrderedContainerView
   >>> view = OrderedContainerView(m11, TestRequest())

browser/configure.zcml

@@ -390,4 +390,12 @@
       name="node.html"
       />
 
+  <zope:adapter
+      for="loops.interfaces.IDocument
+           zope.publisher.interfaces.browser.IBrowserRequest"
+      provides="zope.interface.Interface"
+      factory="loops.browser.resource.DocumentView"
+      permission="zope.View"
+      />
+
 </configure>

browser/node.py

@@ -72,6 +72,13 @@ class NodeView(object):
             return targetView()
         return u''
 
+    def renderTargetBody(self):
+        target = self.target
+        if target is not None:
+            targetView = zapi.getMultiAdapter((target, self.request))
+            return targetView.render()
+        return u''
+
     @Lazy
     def page(self):
         page = self.context.getPage()

browser/node_macros.pt

@@ -27,7 +27,7 @@
                tal:condition="target"
                tal:attributes="class string:content-$level;
                                ondblclick python: item.editable and onclick or ''"
-               tal:content="structure target/data">
+               tal:content="structure view/renderTargetBody">
             The body
           </div>
   </tal:body>

browser/resource.py

@@ -0,0 +1,59 @@
+#
+#  Copyright (c) 2006 Helmut Merz helmutm@cy55.de
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 2 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+
+"""
+View class for resource objects.
+
+$Id$
+"""
+
+from zope.cachedescriptors.property import Lazy
+from zope.app import zapi
+from zope.app.dublincore.interfaces import ICMFDublinCore
+from zope.proxy import removeAllProxies
+from zope.security import canAccess, canWrite
+from zope.security.proxy import removeSecurityProxy
+
+from loops.interfaces import IDocument, IMediaAsset
+
+renderingFactories = {
+    'text/plain': 'zope.source.plaintext',
+    'text/stx': 'zope.source.stx',
+    'text/structured': 'zope.source.stx',
+    'text/rest': 'zope.source.rest',
+    'text/restructured': 'zope.source.rest',
+}
+
+
+class DocumentView(object):
+
+    def __init__(self, context, request):
+        self.context = context
+        self.request = request
+
+    def render(self):
+        """ Return the rendered content (data) of the context object.
+        """
+        text = self.context.data
+        typeKey = renderingFactories.get(self.context.contentType,
+                                renderingFactories['text/plain'])
+        source = zapi.createObject(typeKey, text)
+        view = zapi.getMultiAdapter((removeAllProxies(source), self.request))
+        return view.render()
+
+    

interfaces.py

@@ -170,6 +170,14 @@ class IDocumentSchema(IResourceSchema):
                 missing_value=u'',
                 required=False)
 
+    contentType = schema.Choice(
+                title=_(u'Content Type'),
+                description=_(u'Content type (format) of the data field'),
+                values=('text/restructured', 'text/structured', 'text/html',
+                        'text/plain',),
+                default='text/restructured',
+                required=True)
+
 
 class IDocumentView(IDocumentSchema):
     """ Used for accessing a document via a node's target attribute"""