Add a document.contentType attribute to allow getting the MIME type of

the current document from JS.  The rest is moving around stuff to deal
with nsIDocument already declaring GetContentType.  bug 73847, r=peterv,
sr=jst

accessible/src/base/nsRootAccessible.cpp

@@ -24,6 +24,7 @@
 #include "nsRootAccessible.h"
 #include "nsCOMPtr.h"
 #include "nsIDocument.h"
+#include "nsIDOMNSDocument.h"
 #include "nsIPresShell.h"
 #include "nsIPresContext.h"
 #include "nsIContent.h"
@@ -401,8 +402,10 @@ NS_IMETHODIMP nsDocAccessibleMixin::GetTitle(nsAWritableString& aTitle)
 
 NS_IMETHODIMP nsDocAccessibleMixin::GetMimeType(nsAWritableString& aMimeType)
 {
-  if (mDocument)
-    return mDocument->GetContentType(aMimeType); 
+  nsCOMPtr<nsIDOMNSDocument> domnsDocument(do_QueryInterface(mDocument));
+  if (domnsDocument) {
+    return domnsDocument->GetContentType(aMimeType);
+  }
   return NS_ERROR_FAILURE;
 }
 

accessible/src/nsRootAccessible.cpp

@@ -24,6 +24,7 @@
 #include "nsRootAccessible.h"
 #include "nsCOMPtr.h"
 #include "nsIDocument.h"
+#include "nsIDOMNSDocument.h"
 #include "nsIPresShell.h"
 #include "nsIPresContext.h"
 #include "nsIContent.h"
@@ -401,8 +402,10 @@ NS_IMETHODIMP nsDocAccessibleMixin::GetTitle(nsAWritableString& aTitle)
 
 NS_IMETHODIMP nsDocAccessibleMixin::GetMimeType(nsAWritableString& aMimeType)
 {
-  if (mDocument)
-    return mDocument->GetContentType(aMimeType); 
+  nsCOMPtr<nsIDOMNSDocument> domnsDocument(do_QueryInterface(mDocument));
+  if (domnsDocument) {
+    return domnsDocument->GetContentType(aMimeType);
+  }
   return NS_ERROR_FAILURE;
 }
 

content/base/public/nsIDocument.h

@@ -137,11 +137,6 @@ public:
   NS_IMETHOD GetBaseTarget(nsAWritableString &aBaseTarget)=0;
   NS_IMETHOD SetBaseTarget(const nsAReadableString &aBaseTarget)=0;
 
-  /**
-   * Return the content (mime) type of this document.
-   */
-  NS_IMETHOD GetContentType(nsAWritableString& aContentType) const = 0;
-
   /**
    * Return a standard name for the document's character set. This will
    * trigger a startDocumentLoad if necessary to answer the question.

content/base/src/nsDocument.cpp

@@ -708,6 +708,16 @@ nsDocument::StartDocumentLoad(const char* aCommand,
   if (aReset)
     rv = Reset(aChannel, aLoadGroup);
 
+  nsXPIDLCString contentType;
+  if (NS_SUCCEEDED(aChannel->GetContentType(getter_Copies(contentType)))) {
+    nsXPIDLCString::const_iterator start, end, semicolon;
+    contentType.BeginReading(start);
+    contentType.EndReading(end);
+    semicolon = start;
+    FindCharInReadable(';', semicolon, end);
+    CopyASCIItoUCS2(Substring(start, semicolon), mContentType);
+  }
+  
   PRBool have_contentLanguage = PR_FALSE;
   nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aChannel);
   if (httpChannel) {
@@ -791,10 +801,10 @@ nsDocument::AddPrincipal(nsIPrincipal *aNewPrincipal)
 }
 
 NS_IMETHODIMP 
-nsDocument::GetContentType(nsAWritableString& aContentType) const
+nsDocument::GetContentType(nsAWritableString& aContentType)
 {
-  // Must be implemented by derived class.
-  return NS_ERROR_NOT_IMPLEMENTED;
+  aContentType = mContentType;
+  return NS_OK;
 }
 
 NS_IMETHODIMP

content/base/src/nsDocument.h

@@ -249,11 +249,6 @@ public:
    */
   NS_IMETHOD AddPrincipal(nsIPrincipal *aPrincipal);
 
-  /**
-   * Return the content (mime) type of this document.
-   */
-  NS_IMETHOD GetContentType(nsAWritableString& aContentType) const;
-
   /**
    * Return the content language of this document.
    */
@@ -596,6 +591,7 @@ protected:
   nsWeakPtr mFocusController;
 
   nsString mContentLanguage;
+  nsString mContentType;
 
 private:
   // These are not implemented and not supported.

content/base/src/nsRange.cpp

@@ -29,6 +29,7 @@
 
 #include "nsIDOMNode.h"
 #include "nsIDOMDocument.h"
+#include "nsIDOMNSDocument.h"
 #include "nsIDOMDocumentFragment.h"
 #include "nsIContent.h"
 #include "nsIDocument.h"
@@ -2305,8 +2306,9 @@ nsRange::CreateContextualFragment(const nsAReadableString& aFragment,
           result = NS_NewHTMLFragmentContentSink(&sink);
           if (NS_SUCCEEDED(result)) {
             parser->SetContentSink(sink);
-            if (document) {
-              document->GetContentType(contentType);
+            nsCOMPtr<nsIDOMNSDocument> domnsDocument(do_QueryInterface(document));
+            if (domnsDocument) {
+              domnsDocument->GetContentType(contentType);
             }
             else {
               // Who're we kidding. This only works for html.

content/html/document/src/nsHTMLDocument.cpp

@@ -361,13 +361,6 @@ nsHTMLDocument::Reset(nsIChannel* aChannel, nsILoadGroup* aLoadGroup)
   return result;
 }
 
-NS_IMETHODIMP 
-nsHTMLDocument::GetContentType(nsAWritableString& aContentType) const
-{
-  aContentType.Assign(NS_LITERAL_STRING("text/html"));
-  return NS_OK;
-}
-
 NS_IMETHODIMP
 nsHTMLDocument::CreateShell(nsIPresContext* aContext,
                             nsIViewManager* aViewManager,

content/html/document/src/nsHTMLDocument.h

@@ -66,8 +66,6 @@ public:
 
   NS_IMETHOD Reset(nsIChannel* aChannel, nsILoadGroup* aLoadGroup);
 
-  NS_IMETHOD GetContentType(nsAWritableString& aContentType) const;
-
   NS_IMETHOD CreateShell(nsIPresContext* aContext,
                          nsIViewManager* aViewManager,
                          nsIStyleSet* aStyleSet,

content/xml/document/src/nsXMLDocument.cpp

@@ -246,14 +246,6 @@ nsXMLDocument::Reset(nsIChannel* aChannel, nsILoadGroup* aLoadGroup)
   return result;
 }
 
-NS_IMETHODIMP 
-nsXMLDocument::GetContentType(nsAWritableString& aContentType) const
-{
-  // XXX Should get document type from incoming stream
-  aContentType.Assign(NS_LITERAL_STRING("text/xml"));
-  return NS_OK;
-}
-
 NS_IMETHODIMP
 nsXMLDocument::GetInterface(const nsIID& aIID, void** aSink)
 {

content/xml/document/src/nsXMLDocument.h

@@ -54,8 +54,6 @@ public:
 
   NS_IMETHOD Reset(nsIChannel* aChannel, nsILoadGroup* aLoadGroup);
 
-  NS_IMETHOD GetContentType(nsAWritableString& aContentType) const;
-
   NS_IMETHOD StartDocumentLoad(const char* aCommand,
                                nsIChannel* channel,
                                nsILoadGroup* aLoadGroup,

content/xul/document/src/nsXULDocument.cpp

@@ -612,8 +612,11 @@ nsXULDocument::GetArena(nsIArena** aArena)
     return NS_OK;
 }
 
+// Override the nsDocument.cpp method to keep from returning the
+// "cached XUL" type which is completely internal and may confuse
+// people
 NS_IMETHODIMP
-nsXULDocument::GetContentType(nsAWritableString& aContentType) const
+nsXULDocument::GetContentType(nsAWritableString& aContentType)
 {
     aContentType.Assign(NS_LITERAL_STRING("application/vnd.mozilla.xul+xml"));
     return NS_OK;

content/xul/document/src/nsXULDocument.h

@@ -129,8 +129,6 @@ public:
 
     NS_IMETHOD Reset(nsIChannel* aChannel, nsILoadGroup* aLoadGroup);
 
-    NS_IMETHOD GetContentType(nsAWritableString& aContentType) const;
-
     NS_IMETHOD StartDocumentLoad(const char* aCommand,
                                  nsIChannel *channel,
                                  nsILoadGroup* aLoadGroup,

dom/public/idl/core/nsIDOMNSDocument.idl

@@ -39,6 +39,8 @@ interface nsIDOMNSDocument : nsISupports
 
            attribute DOMString            title;
 
+  readonly attribute DOMString            contentType;
+
   nsIBoxObject              getBoxObjectFor(in nsIDOMElement elt);
   void                      setBoxObjectFor(in nsIDOMElement elt,
                                             in nsIBoxObject boxObject);