/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is Mozilla Communicator client code.
 *
 * The Initial Developer of the Original Code is Netscape Communications
 * Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 */
#include "nsIDOMHTMLFieldSetElement.h"
#include "nsIDOMHTMLFormElement.h"
#include "nsIScriptObjectOwner.h"
#include "nsIDOMEventReceiver.h"
#include "nsIHTMLContent.h"
#include "nsGenericHTMLElement.h"
#include "nsHTMLAtoms.h"
#include "nsHTMLIIDs.h"
#include "nsIStyleContext.h"
#include "nsIMutableStyleContext.h"
#include "nsStyleConsts.h"
#include "nsIPresContext.h"
#include "nsIForm.h"
#include "nsIFormControl.h"
#include "nsISizeOfHandler.h"

static NS_DEFINE_IID(kIDOMHTMLFieldSetElementIID, NS_IDOMHTMLFIELDSETELEMENT_IID);
static NS_DEFINE_IID(kIDOMHTMLFormElementIID, NS_IDOMHTMLFORMELEMENT_IID);
static NS_DEFINE_IID(kIFormControlIID, NS_IFORMCONTROL_IID);
static NS_DEFINE_IID(kIFormIID, NS_IFORM_IID);

class nsHTMLFieldSetElement : public nsIDOMHTMLFieldSetElement,
                              public nsIJSScriptObject,
                              public nsIHTMLContent,
                              public nsIFormControl 
{
public:
  nsHTMLFieldSetElement(nsINodeInfo *aNodeInfo);
  virtual ~nsHTMLFieldSetElement();

  // nsISupports
  NS_DECL_ISUPPORTS

  // nsIDOMNode
  NS_IMPL_IDOMNODE_USING_GENERIC(mInner)

  // nsIDOMElement
  NS_IMPL_IDOMELEMENT_USING_GENERIC(mInner)

  // nsIDOMHTMLElement
  NS_IMPL_IDOMHTMLELEMENT_USING_GENERIC(mInner)

  // nsIDOMHTMLLegendElement
  NS_IMETHOD GetForm(nsIDOMHTMLFormElement** aForm);
  NS_IMETHOD SetForm(nsIDOMHTMLFormElement* aForm);

  // nsIJSScriptObject
  NS_IMPL_IJSSCRIPTOBJECT_USING_GENERIC(mInner)

  // nsIContent
  NS_IMPL_ICONTENT_NO_SETPARENT_NO_SETDOCUMENT_USING_GENERIC(mInner)

  // nsIHTMLContent
  NS_IMPL_IHTMLCONTENT_USING_GENERIC(mInner)

  // nsIFormControl
  NS_IMETHOD GetType(PRInt32* aType);
  NS_IMETHOD Init() { return NS_OK; }

protected:
  nsGenericHTMLContainerFormElement mInner;
  nsIForm*                          mForm;
};

// construction, destruction

nsresult
NS_NewHTMLFieldSetElement(nsIHTMLContent** aInstancePtrResult,
                          nsINodeInfo *aNodeInfo)
{
  NS_ENSURE_ARG_POINTER(aInstancePtrResult);
  NS_ENSURE_ARG_POINTER(aNodeInfo);

  nsIHTMLContent* it = new nsHTMLFieldSetElement(aNodeInfo);
  if (nsnull == it) {
    return NS_ERROR_OUT_OF_MEMORY;
  }
  return it->QueryInterface(kIHTMLContentIID, (void**) aInstancePtrResult);
}


nsHTMLFieldSetElement::nsHTMLFieldSetElement(nsINodeInfo *aNodeInfo)
{
  NS_INIT_REFCNT();
  mInner.Init(this, aNodeInfo);
  mForm = nsnull;
}

nsHTMLFieldSetElement::~nsHTMLFieldSetElement()
{
  // Null out form's pointer to us - no ref counting here!
  SetForm(nsnull);
}

// nsISupports

NS_IMPL_ADDREF(nsHTMLFieldSetElement)
NS_IMPL_RELEASE(nsHTMLFieldSetElement)

nsresult
nsHTMLFieldSetElement::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
  NS_IMPL_HTML_CONTENT_QUERY_INTERFACE(aIID, aInstancePtr, this)
  if (aIID.Equals(kIDOMHTMLFieldSetElementIID)) {
    *aInstancePtr = (void*)(nsIDOMHTMLFieldSetElement*)this;
    NS_ADDREF_THIS();
    return NS_OK;
  }
  else if (aIID.Equals(kIFormControlIID)) {
    *aInstancePtr = (void*)(nsIFormControl*)this;
    NS_ADDREF_THIS();
    return NS_OK;
  }
  return NS_NOINTERFACE;
}

// nsIDOMHTMLFieldSetElement

nsresult
nsHTMLFieldSetElement::CloneNode(PRBool aDeep, nsIDOMNode** aReturn)
{
  nsHTMLFieldSetElement* it = new nsHTMLFieldSetElement(mInner.mNodeInfo);
  if (nsnull == it) {
    return NS_ERROR_OUT_OF_MEMORY;
  }
  nsCOMPtr<nsIDOMNode> kungFuDeathGrip(it);
  mInner.CopyInnerTo(this, &it->mInner, aDeep);
  return it->QueryInterface(kIDOMNodeIID, (void**) aReturn);
}

// nsIContent

NS_IMETHODIMP
nsHTMLFieldSetElement::SetParent(nsIContent* aParent)
{
  return mInner.SetParentForFormControls(aParent, this, mForm);
}

NS_IMETHODIMP
nsHTMLFieldSetElement::SetDocument(nsIDocument* aDocument, PRBool aDeep, PRBool aCompileEventHandlers)
{
  return mInner.SetDocumentForFormControls(aDocument, aDeep, aCompileEventHandlers, this, mForm);
}

NS_IMETHODIMP
nsHTMLFieldSetElement::GetForm(nsIDOMHTMLFormElement** aForm)
{
  nsresult result = NS_OK;
  *aForm = nsnull;
  if (nsnull != mForm) {
    nsIDOMHTMLFormElement* formElem = nsnull;
    result = mForm->QueryInterface(kIDOMHTMLFormElementIID, (void**)&formElem);
    if (NS_OK == result) {
      *aForm = formElem;
    }
  }
  return result;
}

NS_IMETHODIMP
nsHTMLFieldSetElement::SetForm(nsIDOMHTMLFormElement* aForm)
{
  nsCOMPtr<nsIFormControl> formControl;
  nsresult result = QueryInterface(kIFormControlIID, getter_AddRefs(formControl));
  if (NS_FAILED(result)) formControl = nsnull;

  nsAutoString nameVal, idVal;
  mInner.GetAttribute(kNameSpaceID_None, nsHTMLAtoms::name, nameVal);
  mInner.GetAttribute(kNameSpaceID_None, nsHTMLAtoms::id, idVal);

  if (mForm && formControl) {
    mForm->RemoveElement(formControl);

    if (nameVal.Length())
      mForm->RemoveElementFromTable(this, nameVal);

    if (idVal.Length())
      mForm->RemoveElementFromTable(this, idVal);
  }

  if (aForm) {
    nsCOMPtr<nsIForm> theForm = do_QueryInterface(aForm, &result);
    mForm = theForm;  // Even if we fail, update mForm (nsnull in failure)
    if ((NS_OK == result) && theForm) {
      if (formControl) {
        theForm->AddElement(formControl);

        if (nameVal.Length())
          theForm->AddElementToTable(this, nameVal);

        if (idVal.Length())
          theForm->AddElementToTable(this, idVal);
      }
    }
  } else {
    mForm = nsnull;
  }

  mInner.SetForm(mForm);

  return result;
}

NS_IMETHODIMP
nsHTMLFieldSetElement::StringToAttribute(nsIAtom* aAttribute,
                                       const nsString& aValue,
                                       nsHTMLValue& aResult)
{
  return NS_CONTENT_ATTR_NOT_THERE;
}

NS_IMETHODIMP
nsHTMLFieldSetElement::AttributeToString(nsIAtom* aAttribute,
                                       const nsHTMLValue& aValue,
                                       nsString& aResult) const
{
  return mInner.AttributeToString(aAttribute, aValue, aResult);
}

static void
MapAttributesInto(const nsIHTMLMappedAttributes* aAttributes,
                  nsIMutableStyleContext* aContext,
                  nsIPresContext* aPresContext)
{
  nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aContext, aPresContext);
}

NS_IMETHODIMP
nsHTMLFieldSetElement::GetMappedAttributeImpact(const nsIAtom* aAttribute,
                                                PRInt32& aHint) const
{
  if (! nsGenericHTMLElement::GetCommonMappedAttributesImpact(aAttribute, aHint)) {
    aHint = NS_STYLE_HINT_CONTENT;
  }
  return NS_OK;
}

NS_IMETHODIMP
nsHTMLFieldSetElement::GetAttributeMappingFunctions(nsMapAttributesFunc& aFontMapFunc,
                                                    nsMapAttributesFunc& aMapFunc) const
{
  aFontMapFunc = nsnull;
  aMapFunc = &MapAttributesInto;
  return NS_OK;
}


NS_IMETHODIMP
nsHTMLFieldSetElement::HandleDOMEvent(nsIPresContext* aPresContext,
                                    nsEvent* aEvent,
                                    nsIDOMEvent** aDOMEvent,
                                    PRUint32 aFlags,
                                    nsEventStatus* aEventStatus)
{
  return mInner.HandleDOMEvent(aPresContext, aEvent, aDOMEvent,
                               aFlags, aEventStatus);
}

// nsIFormControl

NS_IMETHODIMP
nsHTMLFieldSetElement::GetType(PRInt32* aType)
{
  if (aType) {
    *aType = NS_FORM_FIELDSET;
    return NS_OK;
  } else {
    return NS_FORM_NOTOK;
  }
}


NS_IMETHODIMP
nsHTMLFieldSetElement::SizeOf(nsISizeOfHandler* aSizer, PRUint32* aResult) const
{
  if (!aResult) return NS_ERROR_NULL_POINTER;
#ifdef DEBUG
  mInner.SizeOf(aSizer, aResult, sizeof(*this));
  if (mForm) {
    PRBool recorded;
    aSizer->RecordObject(mForm, &recorded);
    if (!recorded) {
      PRUint32 formSize;
      mForm->SizeOf(aSizer, &formSize);
      aSizer->AddSize(nsHTMLAtoms::iform, formSize);
    }
  }
#endif
  return NS_OK;
}