Start adding start-tag column + lineno info in error msgs.

Repaired test for ""at most one of content, replace, repeat" TAL error
and improved the msg.

lib/python/TAL/HTMLTALParser.py

@@ -90,7 +90,7 @@ import sys
 import string
 
 from TALGenerator import TALGenerator
-from TALDefs import ZOPE_METAL_NS, ZOPE_TAL_NS
+from TALDefs import ZOPE_METAL_NS, ZOPE_TAL_NS, METALError, TALError
 from nsgmllib import SGMLParser
 
 BOOLEAN_HTML_ATTRS = [
@@ -209,7 +209,8 @@ class HTMLTALParser(SGMLParser):
         else:
             self.tagstack.append(tag)
         attrlist, taldict, metaldict = self.extract_attrs(attrs)
-        self.gen.emitStartElement(tag, attrlist, taldict, metaldict)
+        self.gen.emitStartElement(tag, attrlist, taldict, metaldict,
+                                  self.getpos())
 
     def finish_endtag(self, tag, implied=0):
         if tag in EMPTY_HTML_TAGS:
@@ -284,11 +285,17 @@ class HTMLTALParser(SGMLParser):
                 prefix, suffix = string.split(key, ':', 1)
                 nsuri = self.nsdict.get(prefix)
                 if nsuri == ZOPE_METAL_NS:
+                    if metaldict.has_key(suffix):
+                        raise METALError("duplicate METAL attribute " +
+                                         `suffix`, self.getpos())
                     item = (key, value)
                     metaldict[suffix] = value
                     if suffix == "define-macro":
                         item = (key,value,"macroHack")
                 elif nsuri == ZOPE_TAL_NS:
+                    if taldict.has_key(suffix):
+                        raise TALError("duplicate TAL attribute " +
+                                       `suffix`, self.getpos())
                     item = (key, value)
                     taldict[suffix] = value
             attrlist.append(item)

lib/python/TAL/TALDefs.py

@@ -111,7 +111,17 @@ KNOWN_TAL_ATTRIBUTES = [
     ]
 
 class TALError(Exception):
-    pass
+    def __init__(self, msg, position=None):
+        self.msg = msg
+        self.position = position    # (line, offset) pair
+
+    def __str__(self):
+        if self.position:
+            result = "%s, at line %d, column %d" % (
+                self.msg, self.position[0], self.position[1]+1)
+        else:
+            result = self.msg
+        return result
 
 class METALError(TALError):
     pass

lib/python/TAL/TALGenerator.py

@@ -202,12 +202,13 @@ class TALGenerator:
     def emitText(self, text):
         self.emitRawText(cgi.escape(text))
 
-    def emitDefines(self, defines):
+    def emitDefines(self, defines, position):
         for part in splitParts(defines):
             m = re.match(
                 r"\s*(?:(global|local)\s+)?(%s)\s+(.*)" % NAME_RE, part)
             if not m:
-                raise TALError("invalid define syntax: " + `part`)
+                raise TALError("invalid define syntax: " + `part`,
+                               position)
             scope, name, expr = m.group(1, 2, 3)
             scope = scope or "local"
             cexpr = self.compileExpression(expr)
@@ -304,13 +305,14 @@ class TALGenerator:
             newlist.append(item)
         return newlist
 
-    def emitStartElement(self, name, attrlist, taldict, metaldict):
+    def emitStartElement(self, name, attrlist, taldict, metaldict,
+                         position):
         for key in taldict.keys():
             if key not in KNOWN_TAL_ATTRIBUTES:
-                raise TALError("bad TAL attribute: " + `key`)
+                raise TALError("bad TAL attribute: " + `key`, position)
         for key in metaldict.keys():
             if key not in KNOWN_METAL_ATTRIBUTES:
-                raise METALError("bad METAL attribute: " + `key`)
+                raise METALError("bad METAL attribute: " + `key`, position)
         todo = {}
         defineMacro = metaldict.get("define-macro")
         useMacro = metaldict.get("use-macro")
@@ -328,13 +330,15 @@ class TALGenerator:
         if fillSlot: n = n+1
         if defineSlot: n = n+1
         if n > 1:
-            raise METALError("only one METAL attribute per element")
+            raise METALError("only one METAL attribute per element",
+                             position)
         n = 0
         if content: n = n+1
-        if replace: n + n+1
+        if replace: n = n+1
         if repeat: n = n+1
         if n > 1:
-            raise TALError("can't use content, replace, repeat together")
+            raise TALError("at most one of content, replace, repeat",
+                           position)
         repeatWhitespace = None
         if repeat:
             # Hack to include preceding whitespace in the loop program
@@ -354,7 +358,7 @@ class TALGenerator:
             todo["fillSlot"] = fillSlot
         if defines:
             self.emit("beginScope")
-            self.emitDefines(defines)
+            self.emitDefines(defines, position)
             todo["define"] = defines
         if condition:
             self.pushProgram()