[gen] Wrapper.reindex: allow to specify attribute 'fields' containing the list of fields that must be reindexed. If not given, all object fields are reindexed. [pod] POD ODS templates: into POD results from ODS templates, Python expressions that produce ints, floats or dates (Zope DateTime only for the moment) produce cells with typed values.

gen/wrappers/__init__.py

@@ -372,14 +372,20 @@ class AbstractWrapper(object):
             exec expression
         return ctx
 
-    def reindex(self):
+    def reindex(self, fields=None, unindex=False):
         '''Asks a direct object reindexing. In most cases you don't have to
            reindex objects "manually" with this method. When an object is
            modified after some user action has been performed, Appy reindexes
            this object automatically. But if your code modifies other objects,
            Appy may not know that they must be reindexed, too. So use this
-           method in those cases.'''
-        self.o.reindex()
+           method in those cases.
+        '''
+        if fields:
+            # Get names of indexes from field names.
+            indexes = [Search.getIndexName(name) for name in fields]
+        else:
+            indexes = None
+        self.o.reindex(indexes=indexes, unindex=unindex)
 
     def export(self, at='string', format='xml', include=None, exclude=None):
         '''Creates an "exportable" version of this object. p_format is "xml" by

pod/buffers.py

@@ -139,12 +139,24 @@ class Buffer:
 
     def getLength(self): pass # To be overridden
 
-    def dumpStartElement(self, elem, attrs={}, ignoreAttrs=()):
+    def dumpStartElement(self, elem, attrs={}, ignoreAttrs=(),
+                         insertAttributesHook=False):
+        '''Inserts into this buffer the start tag p_elem, with its p_attrs,
+           excepted those listed in p_ignoreAttrs. If p_insertAttributesHook
+           is True (works only for MemoryBuffers), we will insert an Attributes
+           instance at the end of the list of dumped attributes, in order to be
+           able, when evaluating the buffer, to dump additional attributes, not
+           known at this dump time.'''
         self.write('<%s' % elem)
         for name, value in attrs.items():
             if ignoreAttrs and (name in ignoreAttrs): continue
             self.write(' %s=%s' % (name, quoteattr(value)))
+        if insertAttributesHook:
+            res = self.addAttributes()
+        else:
+            res = None
         self.write('>')
+        return res
 
     def dumpEndElement(self, elem):
         self.write('</%s>' % elem)
@@ -179,12 +191,21 @@ class FileBuffer(Buffer):
         except UnicodeDecodeError:
             self.content.write(something)
 
-    def addExpression(self, expression):
+    def addExpression(self, expression, tiedHook=None):
+        # At 2013-02-06, this method was not called within the whole test suite.
         try:
             self.dumpContent(Expression(expression).evaluate(self.env.context))
         except Exception, e:
             PodError.dump(self, EVAL_EXPR_ERROR % (expression, e), dumpTb=False)
 
+    def addAttributes(self):
+        # Into a FileBuffer, it is not possible to insert Attributes. Every
+        # Attributes instance is tied to an Expression; because dumping
+        # expressions directly into FileBuffer instances seems to be a rather
+        # theorical case (see comment inside the previous method), it does not
+        # seem to be a real problem.
+        pass
+
     def pushSubBuffer(self, subBuffer): pass
 
 # ------------------------------------------------------------------------------
@@ -298,14 +319,21 @@ class MemoryBuffer(Buffer):
                 # Remember where this cell is in the table
                 newElem.colIndex = newElem.tableInfo.curColIndex
 
-    def addExpression(self, expression):
+    def addExpression(self, expression, tiedHook=None):
         # Create the POD expression
         expr = Expression(expression)
-        expr.expr = expression
+        if tiedHook: tiedHook.tiedExpression = expr
         self.elements[self.getLength()] = expr
         self.content += u' '# To be sure that an expr and an elem can't be found
                             # at the same index in the buffer.
 
+    def addAttributes(self):
+        # Create the Attributes instance
+        attrs = Attributes(self.env)
+        self.elements[self.getLength()] = attrs
+        self.content += u' '
+        return attrs
+
     def createAction(self, statementGroup):
         '''Tries to create an action based on p_statementGroup. If the statement
            is not correct, r_ is -1. Else, r_ is the index of the element within
@@ -547,6 +575,8 @@ class MemoryBuffer(Buffer):
                     except Exception, e:
                         PodError.dump(result, EVAL_EXPR_ERROR % (
                             evalEntry.expr, e), dumpTb=False)
+                elif isinstance(evalEntry, Attributes):
+                    result.write(evalEntry.evaluate(self.env.context))
                 else: # It is a subBuffer
                     if evalEntry.action:
                         evalEntry.action.execute()

pod/elements.py

@@ -17,6 +17,7 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,USA.
 
 # ------------------------------------------------------------------------------
+from xml.sax.saxutils import quoteattr
 from appy.shared.xml_parser import XmlElement
 from appy.pod.odf_parser import OdfEnvironment as ns
 from appy.pod import PodError
@@ -71,11 +72,38 @@ class Table(PodElement):
         self.tableInfo = None # ~OdTable~
 
 class Expression(PodElement):
+    '''Instances of this class represent Python expressions that are inserted
+       into a POD template.'''
     OD = None
     def __init__(self, pyExpr):
+        # The Python expression
         self.expr = pyExpr
+        # We will store here the expression's true result (before being
+        # converted to a string)
+        self.result = None
+        # This boolean indicates if this Expression instance has already been
+        # evaluated or not. Expressions which are tied to attribute hooks are
+        # already evaluated when the tied hook is evaluated: this boolean
+        # prevents the expression from being evaluated twice.
+        self.evaluated = False
+
     def evaluate(self, context):
-        res = eval(self.expr, context)
+        '''Evaluates the Python expression (self.expr) with a given
+           p_context.'''
+        # Evaluate the expression, or get it from self.result if it has already
+        # been computed.
+        if self.evaluated:
+            res = self.result
+            # It can happen only once, to ask to evaluate an expression that
+            # was already evaluated (from the tied hook). We reset here the
+            # boolean "evaluated" to allow for the next evaluation, probably
+            # with another context.
+            self.evaluated = False
+        else:
+            # Evaluates the Python expression
+            res = self.result = eval(self.expr, context)
+        # Converts the expression result to a string that can be inserted into
+        # the POD result.
         if res == None:
             res = u''
         elif isinstance(res, str):
@@ -85,4 +113,53 @@ class Expression(PodElement):
         else:
             res = unicode(res)
         return res
+
+class Attributes(PodElement):
+    '''Represents a bunch of XML attributes that will be dumped for a given tag
+       in the result.'''
+    OD = None
+    floatTypes = ('int', 'long', 'float')
+    dateTypes = ('DateTime',)
+
+    def __init__(self, env):
+        self.attrs = {}
+        # Depending on the result of a tied expression, we will dump, for
+        # another tag, the series of attrs that this instance represents.
+        self.tiedExpression = None
+        # We will need the env to get the full names of attributes to dump.
+        self.env = env
+
+    def computeAttributes(self, expr):
+        '''p_expr has been evaluated: its result is in expr.result. Depending
+           on its type, we will dump the corresponding attributes in
+           self.attrs.'''
+        exprType = expr.result.__class__.__name__
+        tags = self.env.tags
+        attrs = self.attrs
+        if exprType in self.floatTypes:
+            attrs[tags['value-type']] = 'float'
+            attrs[tags['value']] = str(expr.result)
+        elif exprType in self.dateTypes:
+            attrs[tags['value-type']] = 'date'
+            attrs[tags['value']] = expr.result.strftime('%Y-%m-%d')
+        else:
+            attrs[tags['value-type']] = 'string'
+
+    def evaluate(self, context):
+        # Evaluate first the tied expression, in order to determine its type.
+        try:
+            self.tiedExpression.evaluate(context)
+            self.evaluated = True
+        except Exception, e:
+            # Don't set "evaluated" to True. This way, when the buffer will
+            # evaluate the expression directly, we will really evaluate it, so
+            # the error will be dumped into the pod result.
+            pass
+        # Analyse the return type of the expression.
+        self.computeAttributes(self.tiedExpression)
+        # Now, self.attrs has been populated. Transform it into a string.
+        res = ''
+        for name, value in self.attrs.iteritems():
+            res += ' %s=%s' % (name, quoteattr(value))
+        return res
 # ------------------------------------------------------------------------------

pod/pod_parser.py

@@ -110,6 +110,7 @@ class PodEnvironment(OdfEnvironment):
         self.namedIfActions = {} #~{s_statementName: IfAction}~
         # Currently parsed expression within an ODS template
         self.currentOdsExpression = None
+        self.currentOdsHook = None
         # Names of some tags, that we will compute after namespace propagation
         self.tags = None
 
@@ -204,6 +205,7 @@ class PodEnvironment(OdfEnvironment):
           'table-cell': '%s:table-cell' % ns[self.NS_TABLE],
           'formula': '%s:formula' % ns[self.NS_TABLE],
           'value-type': '%s:value-type' % ns[self.NS_OFFICE],
+          'value': '%s:value' % ns[self.NS_OFFICE],
           'string-value': '%s:string-value' % ns[self.NS_OFFICE],
           'span': '%s:span' % ns[self.NS_TEXT],
           'number-columns-spanned': '%s:number-columns-spanned' % \
@@ -246,10 +248,12 @@ class PodParser(OdfParser):
             e.exprHasStyle = False
         elif (elem == e.tags['table-cell']) and \
              attrs.has_key(e.tags['formula']) and \
-             (attrs[e.tags['value-type']] == 'string'):
+             (attrs[e.tags['value-type']] == 'string') and \
+             attrs[e.tags['formula']].startswith('of:="'):
             # In an ODS template, any cell containing a formula of type "string"
-            # is considered to contain a POD expression. But here it is a
-            # special case: we need to dump the cell; the expression is not
+            # and whose content is expressed as a string between double quotes
+            # (="...") is considered to contain a POD expression. But here it
+            # is a special case: we need to dump the cell; the expression is not
             # directly contained within this cell; the expression will be
             # contained in the next inner paragraph. So we must here dump the
             # cell, but without some attributes, because the "formula" will be
@@ -257,10 +261,13 @@ class PodParser(OdfParser):
             if e.mode == e.ADD_IN_SUBBUFFER:
                 e.addSubBuffer()
             e.currentBuffer.addElement(e.currentElem.name)
-            e.currentBuffer.dumpStartElement(elem, attrs,
-                ignoreAttrs=(e.tags['formula'], e.tags['string-value']))
+            hook = e.currentBuffer.dumpStartElement(elem, attrs,
+                     ignoreAttrs=(e.tags['formula'], e.tags['string-value'],
+                                  e.tags['value-type']),
+                     insertAttributesHook=True)
             # We already have the POD expression: remember it on the env.
             e.currentOdsExpression = attrs[e.tags['string-value']]
+            e.currentOdsHook = hook
         else:
             if e.state == e.IGNORING:
                 pass
@@ -304,8 +311,10 @@ class PodParser(OdfParser):
             elif e.state == e.READING_CONTENT:
                 # Dump the ODS POD expression if any
                 if e.currentOdsExpression:
-                    e.currentBuffer.addExpression(e.currentOdsExpression)
+                    e.currentBuffer.addExpression(e.currentOdsExpression,
+                                                  tiedHook=e.currentOdsHook)
                     e.currentOdsExpression = None
+                    e.currentOdsHook = None
                 # Dump the ending tag
                 e.currentBuffer.dumpEndElement(elem)
                 if elem in e.impactableElements: