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# HG changeset patch
# Parent  7037f62ad7cd2336ec2d6268d9ffb0a66d00870d
[DOM:HTML] Add prefs to disable rendering html content and treat html as xhtml

These prefs will optionally either treat html as plain text (rendered by the
html5 parser) or treat html as xhtml and send it through the xml parser.

It is currently unknown if the DOM API for creating html documents
programatically is affected.

diff --git a/dom/html/nsHTMLDocument.cpp b/dom/html/nsHTMLDocument.cpp
--- a/dom/html/nsHTMLDocument.cpp
+++ b/dom/html/nsHTMLDocument.cpp
@@ -575,6 +575,15 @@ nsHTMLDocument::StartDocumentLoad(const 
         loadAsHtml5 = false;
       }
     }
+
+    // Treat HTML as XHTML by pref
+    if (!isAbout && html &&
+        Preferences::GetBool("content.html.isXHTML", false) &&
+        !Preferences::GetBool("content.html.disable", false)) {
+      mType = eXHTML;
+      mCompatMode = eCompatibility_FullStandards;
+      loadAsHtml5 = false;
+    }
   }
 
   CSSLoader()->SetCompatibilityMode(mCompatMode);
@@ -608,6 +617,13 @@ nsHTMLDocument::StartDocumentLoad(const 
       }
     } else if (viewSource && !html) {
       mParser->MarkAsNotScriptCreated("view-source-xml");
+    } else if (html && Preferences::GetBool("content.html.disable", false)) {
+      // HTML is rendered as plain-text unless view-source
+      if (viewSource) {
+        mParser->MarkAsNotScriptCreated("view-source");
+      } else {
+        mParser->MarkAsNotScriptCreated("plain-text");
+      }
     } else {
       mParser->MarkAsNotScriptCreated(aCommand);
     }

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