nsHTMLBaseFontElement.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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#include "nsIDOMHTMLBaseFontElement.h"
#include "nsIDOMEventReceiver.h"
#include "nsIHTMLContent.h"
#include "nsGenericHTMLElement.h"
#include "nsHTMLAtoms.h"
#include "nsStyleConsts.h"
#include "nsIPresContext.h"


class nsHTMLBaseFontElement : public nsGenericHTMLLeafElement,
                              public nsIDOMHTMLBaseFontElement
{
public:
  nsHTMLBaseFontElement();
  virtual ~nsHTMLBaseFontElement();

  // nsISupports
  NS_DECL_ISUPPORTS_INHERITED

  // nsIDOMNode
  NS_FORWARD_NSIDOMNODE_NO_CLONENODE(nsGenericHTMLLeafElement::)

  // nsIDOMElement
  NS_FORWARD_NSIDOMELEMENT(nsGenericHTMLLeafElement::)

  // nsIDOMHTMLElement
  NS_FORWARD_NSIDOMHTMLELEMENT(nsGenericHTMLLeafElement::)

  // nsIDOMHTMLBaseElement
  NS_DECL_NSIDOMHTMLBASEFONTELEMENT

  NS_IMETHOD GetMappedAttributeImpact(const nsIAtom* aAttribute, PRInt32 aModType,
                                      nsChangeHint& aHint) const;
#ifdef DEBUG
  NS_IMETHOD SizeOf(nsISizeOfHandler* aSizer, PRUint32* aResult) const;
#endif
};

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

  nsHTMLBaseFontElement* it = new nsHTMLBaseFontElement();

  if (!it) {
    return NS_ERROR_OUT_OF_MEMORY;
  }

  nsresult rv = it->Init(aNodeInfo);

  if (NS_FAILED(rv)) {
    delete it;

    return rv;
  }

  *aInstancePtrResult = NS_STATIC_CAST(nsIHTMLContent *, it);
  NS_ADDREF(*aInstancePtrResult);

  return NS_OK;
}


nsHTMLBaseFontElement::nsHTMLBaseFontElement()
{
}

nsHTMLBaseFontElement::~nsHTMLBaseFontElement()
{
}


NS_IMPL_ADDREF(nsHTMLBaseFontElement)
NS_IMPL_RELEASE(nsHTMLBaseFontElement)


// QueryInterface implementation for nsHTMLBaseFontElement
NS_HTML_CONTENT_INTERFACE_MAP_BEGIN(nsHTMLBaseFontElement,
                                    nsGenericHTMLLeafElement)
  NS_INTERFACE_MAP_ENTRY(nsIDOMHTMLBaseFontElement)
  NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(HTMLBaseFontElement)
NS_HTML_CONTENT_INTERFACE_MAP_END


nsresult
nsHTMLBaseFontElement::CloneNode(PRBool aDeep, nsIDOMNode** aReturn)
{
  NS_ENSURE_ARG_POINTER(aReturn);
  *aReturn = nsnull;

  nsHTMLBaseFontElement* it = new nsHTMLBaseFontElement();

  if (!it) {
    return NS_ERROR_OUT_OF_MEMORY;
  }

  nsCOMPtr<nsIDOMNode> kungFuDeathGrip(it);

  nsresult rv = it->Init(mNodeInfo);

  if (NS_FAILED(rv))
    return rv;

  CopyInnerTo(this, it, aDeep);

  *aReturn = NS_STATIC_CAST(nsIDOMNode *, it);

  NS_ADDREF(*aReturn);

  return NS_OK;
}


NS_IMPL_STRING_ATTR(nsHTMLBaseFontElement, Color, color)
NS_IMPL_STRING_ATTR(nsHTMLBaseFontElement, Face, face)

NS_IMETHODIMP
nsHTMLBaseFontElement::GetSize(PRInt32 *aSize)
{
  *aSize = 3;

  nsHTMLValue value;
  if (NS_CONTENT_ATTR_HAS_VALUE !=
      GetHTMLAttribute(nsHTMLAtoms::size, value)) {
    return NS_OK;
  }

  if (value.GetUnit() == eHTMLUnit_Integer) {
    *aSize = value.GetIntValue();

    return NS_OK;
  }

  if (value.GetUnit() != eHTMLUnit_String) {
    return NS_OK;
  }

  nsAutoString stringValue;
  value.GetStringValue(stringValue);
  if (stringValue.IsEmpty()) {
    return NS_OK;
  }

  PRInt32 ec;
  PRInt32 intValue;
  intValue = stringValue.ToInteger(&ec);
  if (ec != 0) {
    return NS_ERROR_FAILURE;
  }

  if (stringValue[0] == PRUnichar('+') ||
      stringValue[0] == PRUnichar('-')) {
    *aSize += intValue;
  }
  else {
    *aSize = intValue;
  }

  return NS_OK;
}

NS_IMETHODIMP
nsHTMLBaseFontElement::SetSize(PRInt32 aSize)
{
  nsHTMLValue value(aSize, eHTMLUnit_Integer);

  return SetHTMLAttribute(nsHTMLAtoms::size, value, PR_TRUE);
}

NS_IMETHODIMP
nsHTMLBaseFontElement::GetMappedAttributeImpact(const nsIAtom* aAttribute, PRInt32 aModType,
                                                nsChangeHint& aHint) const
{
  if ((nsHTMLAtoms::color == aAttribute) ||
      (nsHTMLAtoms::face == aAttribute) ||
      (nsHTMLAtoms::size == aAttribute)) {
    aHint = NS_STYLE_HINT_RECONSTRUCT_ALL;  // XXX this seems a bit harsh, perhaps we need a reflow_all?
  }
  else if (! nsGenericHTMLElement::GetCommonMappedAttributesImpact(aAttribute, aHint)) {
    aHint = NS_STYLE_HINT_CONTENT;
  }
  return NS_OK;
}

#ifdef DEBUG
NS_IMETHODIMP
nsHTMLBaseFontElement::SizeOf(nsISizeOfHandler* aSizer,
                              PRUint32* aResult) const
{
  *aResult = sizeof(*this) + BaseSizeOf(aSizer);

  return NS_OK;
}
#endif