/* -*- 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 1.0 (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.
 */
#include "nsIDOMHTMLIFrameElement.h"
#include "nsIScriptObjectOwner.h"
#include "nsIDOMEventReceiver.h"
#include "nsIHTMLContent.h"
#include "nsGenericHTMLElement.h"
#include "nsHTMLAtoms.h"
#include "nsHTMLIIDs.h"
#include "nsIStyleContext.h"
#include "nsStyleConsts.h"
#include "nsIPresContext.h"
#include "nsIHTMLAttributes.h"

static NS_DEFINE_IID(kIDOMHTMLIFrameElementIID, NS_IDOMHTMLIFRAMEELEMENT_IID);

static nsGenericHTMLElement::EnumTable kAlignTable[] = {
  { "left", NS_STYLE_TEXT_ALIGN_LEFT },
  { "right", NS_STYLE_TEXT_ALIGN_RIGHT },
  { "center", NS_STYLE_TEXT_ALIGN_CENTER },
  { 0 }
};

class nsHTMLIFrameElement : public nsIDOMHTMLIFrameElement,
                            public nsIScriptObjectOwner,
                            public nsIDOMEventReceiver,
                            public nsIHTMLContent
{
public:
  nsHTMLIFrameElement(nsIAtom* aTag);
  ~nsHTMLIFrameElement();

  // 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)

  // nsIDOMHTMLIFrameElement
  NS_IMETHOD GetAlign(nsString& aAlign);
  NS_IMETHOD SetAlign(const nsString& aAlign);
  NS_IMETHOD GetFrameBorder(nsString& aFrameBorder);
  NS_IMETHOD SetFrameBorder(const nsString& aFrameBorder);
  NS_IMETHOD GetHeight(nsString& aHeight);
  NS_IMETHOD SetHeight(const nsString& aHeight);
  NS_IMETHOD GetLongDesc(nsString& aLongDesc);
  NS_IMETHOD SetLongDesc(const nsString& aLongDesc);
  NS_IMETHOD GetMarginHeight(nsString& aMarginHeight);
  NS_IMETHOD SetMarginHeight(const nsString& aMarginHeight);
  NS_IMETHOD GetMarginWidth(nsString& aMarginWidth);
  NS_IMETHOD SetMarginWidth(const nsString& aMarginWidth);
  NS_IMETHOD GetName(nsString& aName);
  NS_IMETHOD SetName(const nsString& aName);
  NS_IMETHOD GetScrolling(nsString& aScrolling);
  NS_IMETHOD SetScrolling(const nsString& aScrolling);
  NS_IMETHOD GetSrc(nsString& aSrc);
  NS_IMETHOD SetSrc(const nsString& aSrc);
  NS_IMETHOD GetWidth(nsString& aWidth);
  NS_IMETHOD SetWidth(const nsString& aWidth);

  // nsIScriptObjectOwner
  NS_IMPL_ISCRIPTOBJECTOWNER_USING_GENERIC(mInner)

  // nsIDOMEventReceiver
  NS_IMPL_IDOMEVENTRECEIVER_USING_GENERIC(mInner)

  // nsIContent
  NS_IMPL_ICONTENT_USING_GENERIC(mInner)

  // nsIHTMLContent
  NS_IMPL_IHTMLCONTENT_USING_GENERIC(mInner)

protected:
  nsGenericHTMLContainerElement mInner;
};

nsresult
NS_NewHTMLIFrameElement(nsIHTMLContent** aInstancePtrResult, nsIAtom* aTag)
{
  NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
  if (nsnull == aInstancePtrResult) {
    return NS_ERROR_NULL_POINTER;
  }
  nsIHTMLContent* it = new nsHTMLIFrameElement(aTag);
  if (nsnull == it) {
    return NS_ERROR_OUT_OF_MEMORY;
  }
  return it->QueryInterface(kIHTMLContentIID, (void**) aInstancePtrResult);
}

nsHTMLIFrameElement::nsHTMLIFrameElement(nsIAtom* aTag)
{
  NS_INIT_REFCNT();
  mInner.Init(this, aTag);
}

nsHTMLIFrameElement::~nsHTMLIFrameElement()
{
}

NS_IMPL_ADDREF(nsHTMLIFrameElement)

NS_IMPL_RELEASE(nsHTMLIFrameElement)

nsresult
nsHTMLIFrameElement::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
  NS_IMPL_HTML_CONTENT_QUERY_INTERFACE(aIID, aInstancePtr, this)
  if (aIID.Equals(kIDOMHTMLIFrameElementIID)) {
    nsIDOMHTMLIFrameElement* tmp = this;
    *aInstancePtr = (void*) tmp;
    mRefCnt++;
    return NS_OK;
  }
  return NS_NOINTERFACE;
}

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

NS_IMPL_STRING_ATTR(nsHTMLIFrameElement, Align, align)
NS_IMPL_STRING_ATTR(nsHTMLIFrameElement, FrameBorder, frameborder)
NS_IMPL_STRING_ATTR(nsHTMLIFrameElement, Height, height)
NS_IMPL_STRING_ATTR(nsHTMLIFrameElement, LongDesc, longdesc)
NS_IMPL_STRING_ATTR(nsHTMLIFrameElement, MarginHeight, marginheight)
NS_IMPL_STRING_ATTR(nsHTMLIFrameElement, MarginWidth, marginwidth)
NS_IMPL_STRING_ATTR(nsHTMLIFrameElement, Name, name)
NS_IMPL_STRING_ATTR(nsHTMLIFrameElement, Scrolling, scrolling)
NS_IMPL_STRING_ATTR(nsHTMLIFrameElement, Src, src)
NS_IMPL_STRING_ATTR(nsHTMLIFrameElement, Width, width)

NS_IMETHODIMP
nsHTMLIFrameElement::StringToAttribute(nsIAtom* aAttribute,
                                       const nsString& aValue,
                                       nsHTMLValue& aResult)
{
  if (aAttribute == nsHTMLAtoms::marginwidth) {
    nsGenericHTMLElement::ParseValueOrPercent(aValue, aResult,
                                              eHTMLUnit_Pixel);
    return NS_CONTENT_ATTR_HAS_VALUE;
  } 
  else if (aAttribute == nsHTMLAtoms::marginheight) {
    nsGenericHTMLElement::ParseValueOrPercent(aValue, aResult,
                                              eHTMLUnit_Pixel);
    return NS_CONTENT_ATTR_HAS_VALUE;
  } 
  if (aAttribute == nsHTMLAtoms::width) {
    nsGenericHTMLElement::ParseValueOrPercent(aValue, aResult,
                                              eHTMLUnit_Pixel);
    return NS_CONTENT_ATTR_HAS_VALUE;
  } 
  else if (aAttribute == nsHTMLAtoms::height) {
    nsGenericHTMLElement::ParseValueOrPercent(aValue, aResult,
                                              eHTMLUnit_Pixel);
    return NS_CONTENT_ATTR_HAS_VALUE;
  } 
  else if (aAttribute == nsHTMLAtoms::frameborder) {
    nsGenericHTMLElement::ParseFrameborderValue(PR_TRUE, aValue, aResult);
    return NS_CONTENT_ATTR_HAS_VALUE;
  } 
  else if (aAttribute == nsHTMLAtoms::scrolling) {
    nsGenericHTMLElement::ParseScrollingValue(PR_TRUE, aValue, aResult);
    return NS_CONTENT_ATTR_HAS_VALUE;
  }
  else if (aAttribute == nsHTMLAtoms::align) {
    if (nsGenericHTMLElement::ParseEnumValue(aValue, kAlignTable, aResult)) {
      return NS_CONTENT_ATTR_HAS_VALUE;
    }
  }
  return NS_CONTENT_ATTR_NOT_THERE;
}

NS_IMETHODIMP
nsHTMLIFrameElement::AttributeToString(nsIAtom* aAttribute,
                                       nsHTMLValue& aValue,
                                       nsString& aResult) const
{
  if (aAttribute == nsHTMLAtoms::frameborder) {
    nsGenericHTMLElement::FrameborderValueToString(PR_TRUE, aValue, aResult);
    return NS_CONTENT_ATTR_HAS_VALUE;
  } 
  else if (aAttribute == nsHTMLAtoms::scrolling) {
    nsGenericHTMLElement::ScrollingValueToString(PR_TRUE, aValue, aResult);
    return NS_CONTENT_ATTR_HAS_VALUE;
  }
  else if (aAttribute == nsHTMLAtoms::align) {
    if (eHTMLUnit_Enumerated == aValue.GetUnit()) {
      nsGenericHTMLElement::EnumValueToString(aValue, kAlignTable, aResult);
      return NS_CONTENT_ATTR_HAS_VALUE;
    }
  }
  return mInner.AttributeToString(aAttribute, aValue, aResult);
}

static void
MapAttributesInto(nsIHTMLAttributes* aAttributes,
                  nsIStyleContext* aContext,
                  nsIPresContext* aPresContext)
{
  if (nsnull != aAttributes) {
    nsGenericHTMLElement::MapImageAlignAttributeInto(aAttributes, aContext, aPresContext);

    nsHTMLValue value;

    float p2t;
    aPresContext->GetScaledPixelsToTwips(p2t);
    nsStylePosition* pos = (nsStylePosition*)
      aContext->GetMutableStyleData(eStyleStruct_Position);
    nsStyleSpacing* spacing = (nsStyleSpacing*)
      aContext->GetMutableStyleData(eStyleStruct_Spacing);

    // width: value
    aAttributes->GetAttribute(nsHTMLAtoms::width, value);
    if (value.GetUnit() == eHTMLUnit_Pixel) {
      nscoord twips = NSIntPixelsToTwips(value.GetPixelValue(), p2t);
      pos->mWidth.SetCoordValue(twips);
    }
    else if (value.GetUnit() == eHTMLUnit_Percent) {
      pos->mWidth.SetPercentValue(value.GetPercentValue());
    }

    // height: value
    aAttributes->GetAttribute(nsHTMLAtoms::height, value);
    if (value.GetUnit() == eHTMLUnit_Pixel) {
      nscoord twips = NSIntPixelsToTwips(value.GetPixelValue(), p2t);
      pos->mHeight.SetCoordValue(twips);
    }
    else if (value.GetUnit() == eHTMLUnit_Percent) {
      pos->mHeight.SetPercentValue(value.GetPercentValue());
    }
  }
  nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aContext, aPresContext);
}

NS_IMETHODIMP
nsHTMLIFrameElement::GetAttributeMappingFunction(nsMapAttributesFunc& aMapFunc) const
{
  aMapFunc = &MapAttributesInto;
  return NS_OK;
}


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

NS_IMETHODIMP
nsHTMLIFrameElement::GetStyleHintForAttributeChange(
    const nsIContent * aNode,
    const nsIAtom* aAttribute,
    PRInt32 *aHint) const
{
  nsGenericHTMLElement::SetStyleHintForCommonAttributes(aNode, aAttribute, aHint);
  return NS_OK;
}