I think the messages are where I want them to be. Will generate test cases

for comparison. Also regen'd all pots and language headers.

include/tidyenum.h

@@ -908,7 +908,6 @@ typedef enum
         FN(PROPRIETARY_ELEMENT)           \
         FN(REPLACING_ELEMENT)             \
         FN(CUSTOM_TAG_DETECTED)           \
-        FN(CUSTOM_TAG_DETECTED_SETTING)   \
         FN(REPLACING_UNEX_ELEMENT)        \
         FN(SPACE_PRECEDING_XMLDECL)       \
         FN(SUSPECTED_MISSING_QUOTE)       \
@@ -921,6 +920,7 @@ typedef enum
         FN(UNEXPECTED_ENDTAG_IN)          \
         FN(UNEXPECTED_ENDTAG)             \
         FN(UNKNOWN_ELEMENT)               \
+        FN(UNKNOWN_ELEMENT_LOOKS_CUSTOM)  \
         FN(USING_BR_INPLACE_OF)
 
 /* error codes used for attribute messages */

localize/translations/language_en_gb.po

@@ -5,7 +5,7 @@ msgstr ""
 "Plural-Forms: nplurals=2; plural=n != 1;\n"
 "X-Generator: HTML Tidy poconvert.rb\n"
 "Project-Id-Version: \n"
-"PO-Revision-Date: 2017-03-11 18:31:52\n"
+"PO-Revision-Date: 2017-03-15 17:35:16\n"
 "Last-Translator: jderry\n"
 "Language-Team: \n"
 
@@ -873,6 +873,11 @@ msgctxt "UNKNOWN_ELEMENT"
 msgid "%s is not recognized!"
 msgstr ""
 
+#, c-format
+msgctxt "UNKNOWN_ELEMENT_LOOKS_CUSTOM"
+msgid "%s is not recognized! Did you mean to enable the custom-tags option?"
+msgstr ""
+
 #, c-format
 msgctxt "PREVIOUS_LOCATION"
 msgid "<%s> previously mentioned"

localize/translations/language_es.po

@@ -5,7 +5,7 @@ msgstr ""
 "Plural-Forms: nplurals=2; plural=n != 1;\n"
 "X-Generator: HTML Tidy poconvert.rb\n"
 "Project-Id-Version: \n"
-"PO-Revision-Date: 2017-03-11 18:31:52\n"
+"PO-Revision-Date: 2017-03-15 17:35:16\n"
 "Last-Translator: jderry\n"
 "Language-Team: \n"
 
@@ -869,6 +869,11 @@ msgctxt "UNKNOWN_ELEMENT"
 msgid "%s is not recognized!"
 msgstr ""
 
+#, c-format
+msgctxt "UNKNOWN_ELEMENT_LOOKS_CUSTOM"
+msgid "%s is not recognized! Did you mean to enable the custom-tags option?"
+msgstr ""
+
 #, c-format
 msgctxt "PREVIOUS_LOCATION"
 msgid "<%s> previously mentioned"

localize/translations/language_es_mx.po

@@ -5,7 +5,7 @@ msgstr ""
 "Plural-Forms: nplurals=2; plural=n != 1;\n"
 "X-Generator: HTML Tidy poconvert.rb\n"
 "Project-Id-Version: \n"
-"PO-Revision-Date: 2017-03-11 18:31:52\n"
+"PO-Revision-Date: 2017-03-15 17:35:16\n"
 "Last-Translator: jderry\n"
 "Language-Team: \n"
 
@@ -869,6 +869,11 @@ msgctxt "UNKNOWN_ELEMENT"
 msgid "%s is not recognized!"
 msgstr ""
 
+#, c-format
+msgctxt "UNKNOWN_ELEMENT_LOOKS_CUSTOM"
+msgid "%s is not recognized! Did you mean to enable the custom-tags option?"
+msgstr ""
+
 #, c-format
 msgctxt "PREVIOUS_LOCATION"
 msgid "<%s> previously mentioned"

localize/translations/language_fr.po

@@ -5,7 +5,7 @@ msgstr ""
 "Plural-Forms: nplurals=2; plural=(n > 1);\n"
 "X-Generator: HTML Tidy poconvert.rb\n"
 "Project-Id-Version: \n"
-"PO-Revision-Date: 2017-03-11 18:31:52\n"
+"PO-Revision-Date: 2017-03-15 17:35:16\n"
 "Last-Translator: jderry\n"
 "Language-Team: \n"
 
@@ -1006,6 +1006,11 @@ msgctxt "UNKNOWN_ELEMENT"
 msgid "%s is not recognized!"
 msgstr "%s n'est pas reconnue !"
 
+#, c-format
+msgctxt "UNKNOWN_ELEMENT_LOOKS_CUSTOM"
+msgid "%s is not recognized! Did you mean to enable the custom-tags option?"
+msgstr ""
+
 #, c-format
 msgctxt "PREVIOUS_LOCATION"
 msgid "<%s> previously mentioned"

localize/translations/language_zh_cn.po

@@ -5,7 +5,7 @@ msgstr ""
 "Plural-Forms: nplurals=1; plural=0;\n"
 "X-Generator: HTML Tidy poconvert.rb\n"
 "Project-Id-Version: \n"
-"PO-Revision-Date: 2017-03-11 18:31:52\n"
+"PO-Revision-Date: 2017-03-15 17:35:16\n"
 "Last-Translator: jderry\n"
 "Language-Team: \n"
 
@@ -863,6 +863,11 @@ msgctxt "UNKNOWN_ELEMENT"
 msgid "%s is not recognized!"
 msgstr ""
 
+#, c-format
+msgctxt "UNKNOWN_ELEMENT_LOOKS_CUSTOM"
+msgid "%s is not recognized! Did you mean to enable the custom-tags option?"
+msgstr ""
+
 #, c-format
 msgctxt "PREVIOUS_LOCATION"
 msgid "<%s> previously mentioned"

localize/translations/tidy.pot

@@ -5,7 +5,7 @@ msgstr ""
 "Plural-Forms: nplurals=2; plural=n != 1;\n"
 "X-Generator: HTML Tidy poconvert.rb\n"
 "Project-Id-Version: \n"
-"POT-Creation-Date: 2017-03-11 18:31:52\n"
+"POT-Creation-Date: 2017-03-15 17:35:16\n"
 "Last-Translator: jderry\n"
 "Language-Team: \n"
 
@@ -865,6 +865,11 @@ msgctxt "UNKNOWN_ELEMENT"
 msgid "%s is not recognized!"
 msgstr ""
 
+#, c-format
+msgctxt "UNKNOWN_ELEMENT_LOOKS_CUSTOM"
+msgid "%s is not recognized! Did you mean to enable the custom-tags option?"
+msgstr ""
+
 #, c-format
 msgctxt "PREVIOUS_LOCATION"
 msgid "<%s> previously mentioned"

src/language_en.h

@@ -386,7 +386,6 @@ static languageDefinition language_en = { whichPluralForm_en, {
     { TRIM_EMPTY_ELEMENT,           0,   "trimming empty %s"                                                       }, /* Notice */
     { REPLACING_ELEMENT,            0,   "replacing %s with %s"                                                    }, /* Notice */
     { CUSTOM_TAG_DETECTED,          0,   "detected autonomous custom tag %s; will treat as %s"                     }, /* Notice */
-    { CUSTOM_TAG_DETECTED_SETTING,  0,   "%s appears to be an autonomous custom tag; did you mean to set the custom-tags option?"  }, /* Notice */
     { TidyCustomBlocklevel,         0,   "block level"                                                             },
     { TidyCustomEmpty,              0,   "empty"                                                                   },
     { TidyCustomInline,             0,   "inline"                                                                  },
@@ -437,7 +436,9 @@ static languageDefinition language_en = { whichPluralForm_en, {
     { SUSPECTED_MISSING_QUOTE,      0,   "missing quote mark for attribute value"                                  }, /* Error? (not really sometimes) */
     { DUPLICATE_FRAMESET,           0,   "repeated FRAMESET element"                                               }, /* Error */
     { UNKNOWN_ELEMENT,              0,   "%s is not recognized!"                                                   }, /* Error */
-    
+    { UNKNOWN_ELEMENT_LOOKS_CUSTOM, 0,   "%s is not recognized! Did you mean to enable the custom-tags option?"    }, /* Error */
+
+
     /* Info */
     { PREVIOUS_LOCATION,            0,   "<%s> previously mentioned"                                               }, /* Info */
     

src/language_en_gb.h

@@ -28,7 +28,7 @@
  *
  * Orginating PO file metadata:
  *   PO_LAST_TRANSLATOR=jderry
- *   PO_REVISION_DATE=2017-03-11 18:31:52
+ *   PO_REVISION_DATE=2017-03-15 17:35:16
  */
 
 #ifdef _MSC_VER

src/language_es.h

@@ -28,7 +28,7 @@
  *
  * Orginating PO file metadata:
  *   PO_LAST_TRANSLATOR=jderry
- *   PO_REVISION_DATE=2017-03-11 18:31:52
+ *   PO_REVISION_DATE=2017-03-15 17:35:16
  */
 
 #ifdef _MSC_VER

src/language_es_mx.h

@@ -28,7 +28,7 @@
  *
  * Orginating PO file metadata:
  *   PO_LAST_TRANSLATOR=jderry
- *   PO_REVISION_DATE=2017-03-11 18:31:52
+ *   PO_REVISION_DATE=2017-03-15 17:35:16
  */
 
 #ifdef _MSC_VER

src/language_fr.h

@@ -28,7 +28,7 @@
  *
  * Orginating PO file metadata:
  *   PO_LAST_TRANSLATOR=jderry
- *   PO_REVISION_DATE=2017-03-11 18:31:52
+ *   PO_REVISION_DATE=2017-03-15 17:35:16
  */
 
 #ifdef _MSC_VER

src/language_zh_cn.h

@@ -28,7 +28,7 @@
  *
  * Orginating PO file metadata:
  *   PO_LAST_TRANSLATOR=jderry
- *   PO_REVISION_DATE=2017-03-11 18:31:52
+ *   PO_REVISION_DATE=2017-03-15 17:35:16
  */
 
 #ifdef _MSC_VER

src/lexer.c

@@ -3000,7 +3000,17 @@ static Node* GetTokenFromStream( TidyDocImpl* doc, GetTokenMode mode )
                 if (lexer->token->tag == NULL) 
                 {
                     if (mode != OtherNamespace) /* [i_a]2 only issue warning if NOT 'OtherNamespace', and tag null */
-                        TY_(ReportFatal)( doc, NULL, lexer->token, UNKNOWN_ELEMENT );
+                    {
+                        /* Special case for HTML5 unknown tags: if it looks 
+                           like an autonomous custom tag, then emit a variation
+                           of the standard message. We don't want to do this
+                           for older HTML, because it's not truly supported
+                           by the standard, although Tidy will allow it. */
+                        if ( (doc->lexer->doctype & VERS_HTML5) > 0 && TY_(elementIsAutonomousCustomFormat)( lexer->token->element ) )
+                            TY_(ReportFatal)( doc, NULL, lexer->token, UNKNOWN_ELEMENT_LOOKS_CUSTOM );
+                        else
+                            TY_(ReportFatal)( doc, NULL, lexer->token, UNKNOWN_ELEMENT );
+                    }
                 }
                 else if ( !cfgBool(doc, TidyXmlTags) )
                 {

src/message.c

@@ -232,11 +232,6 @@ void TY_(ReportNotice)(TidyDocImpl* doc, Node *element, Node *node, uint code)
             tagtype = tidyLocalizedString( cfg( doc, TidyUseCustomTags ) );
             message = TY_(tidyMessageCreateWithNode)(doc, element, code, TidyInfo, elemdesc, tagtype );
             break;
-
-        case CUSTOM_TAG_DETECTED_SETTING:
-            message = TY_(tidyMessageCreateWithNode)(doc, node, code, TidyInfo, nodedesc );
-            break;
-
     }
 
     messageOut( message );
@@ -418,6 +413,7 @@ void TY_(ReportFatal)( TidyDocImpl* doc, Node *element, Node *node, uint code)
             break;
 
         case UNKNOWN_ELEMENT:
+        case UNKNOWN_ELEMENT_LOOKS_CUSTOM:
             TagToString(node, nodedesc, sizeof(nodedesc));
             message = TY_(tidyMessageCreateWithNode)(doc, node, code, TidyError, nodedesc );
             break;

src/tags.c

@@ -586,13 +586,6 @@ Bool TY_(FindTag)( TidyDocImpl* doc, Node *node )
 
         return yes;
     }
-    else if ( TY_(nodeIsAutonomousCustomFormat)( node ) && htmlIs5 )
-    {
-        /* It looks like a custom tag, we're in HTML5, but custom-tags is
-           off, so warn the user. TODO: handle in the lexer so we don't
-           repeat this over and over again.*/
-        TY_(ReportNotice)(doc, node, node, CUSTOM_TAG_DETECTED_SETTING);
-    }
     
     return no;
 }
@@ -1056,14 +1049,14 @@ Bool nodeMatchCM( Node* node, uint contentModel )
 #endif
 
 
-Bool TY_(nodeIsAutonomousCustomFormat)( Node* node )
+Bool TY_(elementIsAutonomousCustomFormat)( ctmbstr element )
 {
-    if ( node->element )
+    if ( element )
     {
-        const char *ptr = strchr(node->element, '-');
+        const char *ptr = strchr(element, '-');
 
         /* Tag must contain hyphen not in first character. */
-        if ( ptr && (ptr - node->element > 0) )
+        if ( ptr && (ptr - element > 0) )
         {
             return yes;
         }
@@ -1072,6 +1065,14 @@ Bool TY_(nodeIsAutonomousCustomFormat)( Node* node )
     return no;
 }
 
+Bool TY_(nodeIsAutonomousCustomFormat)( Node* node )
+{
+    if ( node->element )
+        return TY_(elementIsAutonomousCustomFormat)( node->element );
+
+    return no;
+}
+
 Bool TY_(nodeIsAutonomousCustomTag)( TidyDocImpl* doc, Node* node )
 {
     return TY_(nodeIsAutonomousCustomFormat)( node )

src/tags.h

@@ -134,6 +134,9 @@ Bool nodeMatchCM( Node* node, uint contentModel );
 #endif
 
 
+/* True if the element looks like it's an autonomous custom element tag. */
+Bool TY_(elementIsAutonomousCustomFormat)( ctmbstr element );
+
 /* True if the node looks like it's an autonomous custom element tag. */
 Bool TY_(nodeIsAutonomousCustomFormat)( Node* node );