Issue #456 - add new option show-meta-change

Author: geoffmcl

include/tidyenum.h

@@ -651,6 +651,7 @@ typedef enum
     TidyXmlSpace,                /**< If set to yes adds xml:space attr as needed */
     TidyXmlTags,                 /**< Treat input as XML */
     TidyMetaCharset,             /**< Adds/checks/fixes meta charset in the head, based on document type */
+    TidyShowMetaChange,          /**< show when meta http-equiv content charset was changed - compatibility */
     N_TIDY_OPTIONS               /**< Must be last */
 } TidyOptionId;
 

src/clean.c

@@ -2452,7 +2452,8 @@ Bool TY_(TidyMetaCharset)(TidyDocImpl* doc)
                     newValue = (tmbstr)TidyDocAlloc(doc, 19 + TY_(tmbstrlen)(enc) + 1);
                     TY_(tmbstrcpy)(newValue, "text/html; charset=");
                     TY_(tmbstrcpy)(newValue + 19, enc);
-                    TY_(ReportAttrError)(doc, currentNode, contentAttr, ATTRIBUTE_VALUE_REPLACED);
+                    if (cfgBool(doc, TidyShowMetaChange))   /* Issue #456 - backward compatibility only */
+                        TY_(ReportAttrError)(doc, currentNode, contentAttr, ATTRIBUTE_VALUE_REPLACED);
                     TidyDocFree(doc, contentAttr->value);
                     contentAttr->value = newValue;
                     charsetFound = yes;

src/config.c

@@ -313,6 +313,7 @@ static const TidyOptionImpl option_defs[] =
     { TidyXmlSpace,                MU, "add-xml-space",               BL, no,              ParsePickList,     &boolPicks },
     { TidyXmlTags,                 MU, "input-xml",                   BL, no,              ParsePickList,     &boolPicks },
     { TidyMetaCharset,             MS, "add-meta-charset",            BL, no,              ParsePickList,     &boolPicks }, /* 20161004 - Issue #456 */
+    { TidyShowMetaChange,          MS, "show-meta-change",            BL, no,              ParsePickList,     &boolPicks }, /* 20170609 - Issue #456 */
     { N_TIDY_OPTIONS,              XX, NULL,                          XY, 0,               NULL,              NULL            }
 };
 

src/language_en.h

@@ -1522,7 +1522,12 @@ static languageDefinition language_en = { whichPluralForm_en, {
           be translated. */
       TidyMetaCharset,             0,
         "This option adds a meta element and sets the charset attribute to the encoding of the document."
-        "Set this option to 'yes' if you want this."
+        " Set this option to <var>yes</var> if you want this."
+    },
+    {
+      TidyShowMetaChange,             0,
+        "This option shows when a meta http-equiv content charset attribute was changed to the encoding of the document."
+        " Set this option to <var>yes</var> if you want this."
     },
 
     /********************************************