Added option to clear translation references.

src/collective/multilingual/browser/configure.zcml

@@ -22,6 +22,14 @@
       permission="cmf.ManagePortal"
       />
 
+  <browser:page
+      name="clear-translations"
+      for="..interfaces.IMultilingual"
+      class=".setup.ClearTranslationsView"
+      layer="..interfaces.IBrowserLayer"
+      permission="cmf.ModifyPortalContent"
+      />
+
   <browser:page
       name="set-translation-for"
       for="..interfaces.IMultilingual"

src/collective/multilingual/browser/menu.py

@@ -143,7 +143,19 @@ def getTranslationActionItems(context, request):
 
     menu.sort(key=lambda item: unicode(item['title']))
 
-    if not graph.getTranslations():
+    if graph.getTranslations():
+        menu.append({
+            "title": _(u"Clear..."),
+            "description": _(u"Clear the list of translation references."),
+            "action": graph.context.absolute_url() + "/@@clear-translations",
+            "selected": False,
+            "icon": None,
+            "extra": {"id": "clearTranslations",
+                      "separator": None,
+                      "class": ""},
+            "submenu": None,
+        })
+    else:
         menu.append({
             "title": _(u"This is a translation of..."),
             "description": _(u"Mark this item as the translation for "

src/collective/multilingual/browser/setup.py

@@ -44,6 +44,10 @@ class IAdding(Interface):
     schema.ASCIILine()
 
 
+class IClearTranslations(Interface):
+    pass
+
+
 class ISelectTranslation(Interface):
     target = RelationChoice(
         title=_(u"Item"),
@@ -168,6 +172,14 @@ def handleCreate(self, action):
 
 
 class SetTranslationForView(Form):
+    label = _(u"Select translation")
+    description = _(
+        u"Locate an existing content item for which the current item "
+        u"is a translation. If the selected item already has been "
+        u"translated into the current language, the other reference "
+        u"will be removed."
+    )
+
     fields = field.Fields(ISelectTranslation)
     ignoreContext = True
 
@@ -182,8 +194,9 @@ def handleUse(self, action):
             return
 
         obj = data['target']
+        language = aq_base(self.context).language
 
-        if aq_base(obj).language == aq_base(self.context).language:
+        if language == aq_base(obj).language:
             lt = getToolByName(self.context, 'portal_languages')
 
             lang_name = self.request.locale.displayNames.languages.get(
@@ -197,6 +210,25 @@ def handleUse(self, action):
 
             return
 
+        # Check if an existing translation in the current language
+        # already exists.
+        translations = ITranslationGraph(obj).getTranslations()
+        for lang_id, item in translations:
+            if lang_id != language:
+                continue
+
+            parent = ITranslationGraph(item).detach()
+            if parent is not None:
+                title = item.Title().decode('utf-8')
+                IStatusMessage(self.request).addStatusMessage(
+                    _(u"The existing reference to \"${title}\" has "
+                      u"been replaced.", mapping={'title': title}),
+                    "info"
+                )
+
+                modified(parent)
+
+        # Register new translation.
         ITranslationGraph(self.context).registerTranslation(obj)
         modified(obj)
 
@@ -206,3 +238,33 @@ def handleUse(self, action):
 
         next_url = self.context.absolute_url()
         self.request.response.redirect(next_url)
+
+
+class ClearTranslationsView(Form):
+    label = _(u"Clear translations")
+    description = _(
+        u"Please confirm that you want to clear the translation "
+        u"references."
+    )
+
+    fields = field.Fields(IClearTranslations)
+
+    @button.buttonAndHandler(_(u'Clear'))
+    def handleClear(self, action):
+        data, errors = self.extractData()
+        if errors:
+            self.status = _("Please correct errors.")
+            return
+
+        graph = ITranslationGraph(self.context)
+        graph.clear()
+        parent = graph.detach()
+        if parent is not None:
+            modified(parent)
+
+        IStatusMessage(self.request).addStatusMessage(
+            _(u"References cleared."), "info"
+        )
+
+        next_url = self.context.absolute_url()
+        self.request.response.redirect(next_url)

src/collective/multilingual/events.py

@@ -131,7 +131,7 @@ def objectRemovedEvent(context, event):
 
     container = event.oldParent
     wrapped = context.__of__(container)
-    obj = ITranslationGraph(wrapped).removeTranslation()
+    obj = ITranslationGraph(wrapped).detach()
     if obj is not None:
         modified(obj)
 

src/collective/multilingual/graph.py

@@ -247,11 +247,26 @@ def unregisterTranslation(self, parent):
         parent.translations = translations
         getPersistentTranslationCounter(self.context).change(1)
 
-    def removeTranslation(self):
+    def clear(self):
+        uuids = aq_base(self.context.translations)
+        if uuids:
+            items = map(self.resolve, uuids)
+            self.context.translations = set()
+            getPersistentTranslationCounter(self.context).change(1)
+            return items
+
+        return ()
+
+    def detach(self):
         result = self.catalog(translations=self.uuid)
-        if len(result) != 1:
+        if not result:
             return
 
+        if len(result) > 1:
+            logger.warn(
+                "This object is contained in multiple translation graphs!"
+            )
+
         obj = result[0].getObject()
         obj.translations = obj.translations - set((self.uuid, ))
         getPersistentTranslationCounter(self.context).change(1)

src/collective/multilingual/interfaces.py

@@ -151,7 +151,10 @@ def registerTranslation(parent):
     def unregisterTranslation(parent):
         """Removes context as translation for the provided parent."""
 
-    def removeTranslation():
+    def clear():
+        """Clear own translation references."""
+
+    def detach():
         """Remove context from graph."""
 
 

src/collective/multilingual/locales/da/LC_MESSAGES/collective.multilingual.po

@@ -180,3 +180,33 @@ msgstr "Oversættelse valgt."
 
 msgid "n/a"
 msgstr "ikke tilgængeligt"
+
+msgid "Select translation"
+msgstr "Vælg oversættelse"
+
+msgid "Clear translations"
+msgstr "Fjern referencer til oversættelser"
+
+msgid "Clear"
+msgstr "Udfør"
+
+msgid "References cleared."
+msgstr "Referencer fjernet."
+
+msgid "Clear the list of translation references."
+msgstr "Ryd listen af referencer til oversættelser."
+
+msgid "Clear..."
+msgstr "Fjern..."
+
+msgid "Please confirm that you want to clear the translation references."
+msgstr "Bekræft venligst, at listen over referencer til oversættelser skal ryddes for dette indholdsobjekt."
+
+msgid "Locate an existing content item for which the current item is a translation. If the selected item already has been translated into the current language, the other reference will be removed."
+msgstr "Anvend et eksisterende indholdsobjekt som oversættelse. Bemærk, at hvis det valgte indhold allerede er oversat til det aktuelle sprog, vil denne handling overskrive denne reference."
+
+msgid "The existing reference to \"${title}\" has been replaced."
+msgstr "Bemærk, at en reference til en tidligere oversættelse (\"${title}\") er fjernet i forbindelse med denne handling."
+
+
+

src/collective/multilingual/tests/test_menu.py

@@ -11,7 +11,8 @@ def extract_langs(titles):
     been set up.
     """
 
-    return set([title.split(' ', 1)[0] for title in titles])
+    langs = [title.split(' ', 1)[0] for title in titles]
+    return set(lang for lang in langs if len(lang) <= 3)
 
 
 def extract_actions(items):