[gen] Bugfixes: handle multilingual titles in queries, references, breadcrumbs...

fields/__init__.py

@@ -542,6 +542,13 @@ class Field:
         if self.isEmptyValue(obj, value): return ''
         return value
 
+    def getShownValue(self, obj, value, showChanges=False):
+        '''Similar to m_getFormattedValue, but in some contexts, only a part of
+           p_value must be shown. For example, sometimes we need to display only
+           a language-specific part of a multilingual field (see overridden
+           method in string.py).'''
+        return self.getFormattedValue(obj, value, showChanges)
+
     def getIndexType(self):
         '''Returns the name of the technical, Zope-level index type for this
            field.'''

fields/ref.py

@@ -50,7 +50,7 @@ class Ref(Field):
                                     inPopup=linkInPopup)"
          href=":fullUrl" class=":cssClass" target=":target.target"
          onclick=":target.openPopup">:(not includeShownInfo) and \
-         tied.title or field.getReferenceLabel(tied)
+         tied.o.getShownValue('title') or field.getReferenceLabel(tied)
       </a><span name="subTitle" style=":showSubTitles and 'display:inline' or \
             'display:none'">::tied.o.getSubTitle()</span></x>''')
 
@@ -1237,7 +1237,7 @@ class Ref(Field):
         for fieldName in self.shownInfo:
             refType = refObject.o.getAppyType(fieldName)
             value = getattr(refObject, fieldName)
-            value = refType.getFormattedValue(refObject.o, value)
+            value = refType.getShownValue(refObject.o, value)
             if refType.type == 'String':
                 if refType.format == 2:
                     value = self.xhtmlToText.sub(' ', value)

fields/string.py

@@ -632,6 +632,20 @@ class String(Field):
                                                        showChanges, lg)
         return res
 
+    def getShownValue(self, obj, value, showChanges=False):
+        '''For a multilingual field, this method only shows one specific
+           language part.'''
+        languages = self.getAttribute(obj, 'languages')
+        if len(languages) == 1:
+            return self.getUnilingualFormattedValue(obj, value, showChanges)
+        if not value: return value
+        # Try to propose the part that is in the user language, or the part of
+        # the first content language else.
+        language = obj.getUserLanguage()
+        if language not in value: language = languages[0]
+        return self.getUnilingualFormattedValue(obj, value[language],
+                                                showChanges, language)
+
     def extractText(self, value):
         '''Extracts pure text from XHTML p_value.'''
         return XhtmlTextExtractor(raiseOnError=False).parse('<p>%s</p>' % value)