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nsHTMLTableColElement.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * The contents of this file are subject to the Mozilla 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/MPL/
 *
 * 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 the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
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 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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#include "nsIDOMHTMLTableColElement.h"
#include "nsIDOMEventTarget.h"
#include "nsMappedAttributes.h"
#include "nsGenericHTMLElement.h"
#include "nsGkAtoms.h"
#include "nsStyleConsts.h"
#include "nsPresContext.h"
#include "nsRuleData.h"

// use the same protection as ancient code did 
// http://lxr.mozilla.org/classic/source/lib/layout/laytable.c#46
#define MAX_COLSPAN 1000

class nsHTMLTableColElement : public nsGenericHTMLElement,
                              public nsIDOMHTMLTableColElement
{
public:
  nsHTMLTableColElement(nsINodeInfo *aNodeInfo);
  virtual ~nsHTMLTableColElement();

  // nsISupports
  NS_DECL_ISUPPORTS_INHERITED

  // nsIDOMNode
  NS_FORWARD_NSIDOMNODE(nsGenericHTMLElement::)

  // nsIDOMElement
  NS_FORWARD_NSIDOMELEMENT(nsGenericHTMLElement::)

  // nsIDOMHTMLElement
  NS_FORWARD_NSIDOMHTMLELEMENT(nsGenericHTMLElement::)

  // nsIDOMHTMLTableColElement
  NS_DECL_NSIDOMHTMLTABLECOLELEMENT

  virtual PRBool ParseAttribute(PRInt32 aNamespaceID,
                                nsIAtom* aAttribute,
                                const nsAString& aValue,
                                nsAttrValue& aResult);
  nsMapRuleToAttributesFunc GetAttributeMappingFunction() const;
  NS_IMETHOD_(PRBool) IsAttributeMapped(const nsIAtom* aAttribute) const;

  virtual nsresult Clone(nsINodeInfo *aNodeInfo, nsINode **aResult) const;
};


NS_IMPL_NS_NEW_HTML_ELEMENT(TableCol)


nsHTMLTableColElement::nsHTMLTableColElement(nsINodeInfo *aNodeInfo)
  : nsGenericHTMLElement(aNodeInfo)
{
}

nsHTMLTableColElement::~nsHTMLTableColElement()
{
}


NS_IMPL_ADDREF_INHERITED(nsHTMLTableColElement, nsGenericElement) 
NS_IMPL_RELEASE_INHERITED(nsHTMLTableColElement, nsGenericElement) 


// QueryInterface implementation for nsHTMLTableColElement
NS_HTML_CONTENT_INTERFACE_TABLE_HEAD(nsHTMLTableColElement,
                                    nsGenericHTMLElement)
  NS_INTERFACE_TABLE_INHERITED1(nsHTMLTableColElement,
                                nsIDOMHTMLTableColElement)
NS_HTML_CONTENT_INTERFACE_TABLE_TAIL_CLASSINFO(HTMLTableColElement)

NS_IMPL_ELEMENT_CLONE(nsHTMLTableColElement)


NS_IMPL_STRING_ATTR_DEFAULT_VALUE(nsHTMLTableColElement, Align, align, "left")
NS_IMPL_STRING_ATTR_DEFAULT_VALUE(nsHTMLTableColElement, Ch, _char, ".")
NS_IMPL_STRING_ATTR(nsHTMLTableColElement, ChOff, charoff)
NS_IMPL_INT_ATTR_DEFAULT_VALUE(nsHTMLTableColElement, Span, span, 1)
NS_IMPL_STRING_ATTR_DEFAULT_VALUE(nsHTMLTableColElement, VAlign, valign, "middle")
NS_IMPL_STRING_ATTR(nsHTMLTableColElement, Width, width)


PRBool
nsHTMLTableColElement::ParseAttribute(PRInt32 aNamespaceID,
                                      nsIAtom* aAttribute,
                                      const nsAString& aValue,
                                      nsAttrValue& aResult)
{
  if (aNamespaceID == kNameSpaceID_None) {
    /* ignore these attributes, stored simply as strings ch */
    if (aAttribute == nsGkAtoms::charoff) {
      return aResult.ParseSpecialIntValue(aValue, PR_TRUE, PR_FALSE);
    }
    if (aAttribute == nsGkAtoms::span) {
      /* protection from unrealistic large colspan values */
      return aResult.ParseIntWithBounds(aValue, 1, MAX_COLSPAN);
    }
    if (aAttribute == nsGkAtoms::width) {
      return aResult.ParseSpecialIntValue(aValue, PR_TRUE, PR_FALSE);
    }
    if (aAttribute == nsGkAtoms::align) {
      return ParseTableCellHAlignValue(aValue, aResult);
    }
    if (aAttribute == nsGkAtoms::valign) {
      return ParseTableVAlignValue(aValue, aResult);
    }
  }

  return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
                                              aResult);
}

static 
void MapAttributesIntoRule(const nsMappedAttributes* aAttributes, nsRuleData* aData)
{
  if (aData->mSID == eStyleStruct_Position &&
      aData->mPositionData->mWidth.GetUnit() == eCSSUnit_Null) {
    // width
    const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::width);
    if (value) {
      switch (value->Type()) {
      case nsAttrValue::ePercent: {
        aData->mPositionData->mWidth.SetPercentValue(value->GetPercentValue());
        break;
      }
      case nsAttrValue::eInteger: {
        aData->mPositionData->mWidth.SetFloatValue((float)value->GetIntegerValue(), eCSSUnit_Pixel);
        break;
      }
      default:
        break;
      }
    }
  }
  else if (aData->mSID == eStyleStruct_Text) {
    if (aData->mTextData->mTextAlign.GetUnit() == eCSSUnit_Null) {
      // align: enum
      const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::align);
      if (value && value->Type() == nsAttrValue::eEnum)
        aData->mTextData->mTextAlign.SetIntValue(value->GetEnumValue(), eCSSUnit_Enumerated);
    }
  }
  else if (aData->mSID == eStyleStruct_TextReset) {
    if (aData->mTextData->mVerticalAlign.GetUnit() == eCSSUnit_Null) {
      // valign: enum
      const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::valign);
      if (value && value->Type() == nsAttrValue::eEnum)
        aData->mTextData->mVerticalAlign.SetIntValue(value->GetEnumValue(), eCSSUnit_Enumerated);
    }
  }

  nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aData);
}

static 
void ColMapAttributesIntoRule(const nsMappedAttributes* aAttributes,
                              nsRuleData* aData)
{
  if (aData->mSID == eStyleStruct_Table && 
      aData->mTableData->mSpan.GetUnit() == eCSSUnit_Null) {
    // span: int
    const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::span);
    if (value && value->Type() == nsAttrValue::eInteger)
      aData->mTableData->mSpan.SetIntValue(value->GetIntegerValue(),
                                           eCSSUnit_Integer);
  }

  MapAttributesIntoRule(aAttributes, aData);
}

NS_IMETHODIMP_(PRBool)
nsHTMLTableColElement::IsAttributeMapped(const nsIAtom* aAttribute) const
{
  static const MappedAttributeEntry attributes[] = {
    { &nsGkAtoms::width },
    { &nsGkAtoms::align },
    { &nsGkAtoms::valign },
    { nsnull }
  };

  static const MappedAttributeEntry span_attribute[] = {
    { &nsGkAtoms::span },
    { nsnull }
  };

  static const MappedAttributeEntry* const col_map[] = {
    attributes,
    span_attribute,
    sCommonAttributeMap,
  };

  static const MappedAttributeEntry* const colspan_map[] = {
    attributes,
    sCommonAttributeMap,
  };

  // we only match "span" if we're a <col>
  if (mNodeInfo->Equals(nsGkAtoms::col))
    return FindAttributeDependence(aAttribute, col_map,
                                   NS_ARRAY_LENGTH(col_map));
  return FindAttributeDependence(aAttribute, colspan_map,
                                 NS_ARRAY_LENGTH(colspan_map));
}


nsMapRuleToAttributesFunc
nsHTMLTableColElement::GetAttributeMappingFunction() const
{
  if (mNodeInfo->Equals(nsGkAtoms::col)) {
    return &ColMapAttributesIntoRule;
  }

  return &MapAttributesIntoRule;
}

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