/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * 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):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * 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
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */
#include "nsIDOMHTMLTableSectionElem.h"
#include "nsIDOMEventTarget.h"
#include "nsMappedAttributes.h"
#include "nsGenericHTMLElement.h"
#include "nsGkAtoms.h"
#include "nsHTMLParts.h"
#include "nsStyleConsts.h"
#include "nsContentList.h"
#include "nsRuleData.h"
#include "nsDOMError.h"
#include "nsIDocument.h"

// you will see the phrases "rowgroup" and "section" used interchangably

class nsHTMLTableSectionElement : public nsGenericHTMLElement,
                                  public nsIDOMHTMLTableSectionElement
{
public:
  nsHTMLTableSectionElement(already_AddRefed<nsINodeInfo> aNodeInfo);

  // nsISupports
  NS_DECL_ISUPPORTS_INHERITED

  // nsIDOMNode
  NS_FORWARD_NSIDOMNODE(nsGenericHTMLElement::)

  // nsIDOMElement
  NS_FORWARD_NSIDOMELEMENT(nsGenericHTMLElement::)

  // nsIDOMHTMLElement
  NS_FORWARD_NSIDOMHTMLELEMENT(nsGenericHTMLElement::)

  // nsIDOMHTMLTableSectionElement
  NS_DECL_NSIDOMHTMLTABLESECTIONELEMENT

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

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

  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_NO_UNLINK(nsHTMLTableSectionElement,
                                                     nsGenericHTMLElement)

  virtual nsXPCClassInfo* GetClassInfo();
protected:
  nsRefPtr<nsContentList> mRows;
};


NS_IMPL_NS_NEW_HTML_ELEMENT(TableSection)


nsHTMLTableSectionElement::nsHTMLTableSectionElement(already_AddRefed<nsINodeInfo> aNodeInfo)
  : nsGenericHTMLElement(aNodeInfo)
{
}

NS_IMPL_CYCLE_COLLECTION_CLASS(nsHTMLTableSectionElement)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(nsHTMLTableSectionElement,
                                                  nsGenericHTMLElement)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR_AMBIGUOUS(mRows,
                                                       nsIDOMNodeList)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

NS_IMPL_ADDREF_INHERITED(nsHTMLTableSectionElement, nsGenericElement) 
NS_IMPL_RELEASE_INHERITED(nsHTMLTableSectionElement, nsGenericElement) 


DOMCI_NODE_DATA(HTMLTableSectionElement, nsHTMLTableSectionElement)

// QueryInterface implementation for nsHTMLTableSectionElement
NS_INTERFACE_TABLE_HEAD_CYCLE_COLLECTION_INHERITED(nsHTMLTableSectionElement)
  NS_HTML_CONTENT_INTERFACE_TABLE1(nsHTMLTableSectionElement,
                                   nsIDOMHTMLTableSectionElement)
  NS_HTML_CONTENT_INTERFACE_TABLE_TO_MAP_SEGUE(nsHTMLTableSectionElement,
                                               nsGenericHTMLElement)
NS_HTML_CONTENT_INTERFACE_TABLE_TAIL_CLASSINFO(HTMLTableSectionElement)


NS_IMPL_ELEMENT_CLONE(nsHTMLTableSectionElement)


NS_IMPL_STRING_ATTR_DEFAULT_VALUE(nsHTMLTableSectionElement, Align, align, "left")
NS_IMPL_STRING_ATTR_DEFAULT_VALUE(nsHTMLTableSectionElement, VAlign, valign, "middle")
NS_IMPL_STRING_ATTR_DEFAULT_VALUE(nsHTMLTableSectionElement, Ch, _char, ".")
NS_IMPL_STRING_ATTR(nsHTMLTableSectionElement, ChOff, charoff)


NS_IMETHODIMP
nsHTMLTableSectionElement::GetRows(nsIDOMHTMLCollection** aValue)
{
  *aValue = nsnull;

  if (!mRows) {
    mRows = new nsContentList(this,
                              mNodeInfo->NamespaceID(),
                              nsGkAtoms::tr,
                              nsGkAtoms::tr,
                              PR_FALSE);

    NS_ENSURE_TRUE(mRows, NS_ERROR_OUT_OF_MEMORY);
  }

  NS_ADDREF(*aValue = mRows);
  return NS_OK;
}


NS_IMETHODIMP
nsHTMLTableSectionElement::InsertRow(PRInt32 aIndex,
                                     nsIDOMHTMLElement** aValue)
{
  *aValue = nsnull;

  if (aIndex < -1) {
    return NS_ERROR_DOM_INDEX_SIZE_ERR;
  }

  nsCOMPtr<nsIDOMHTMLCollection> rows;
  GetRows(getter_AddRefs(rows));

  PRUint32 rowCount;
  rows->GetLength(&rowCount);

  if (aIndex > (PRInt32)rowCount) {
    return NS_ERROR_DOM_INDEX_SIZE_ERR;
  }

  PRBool doInsert = (aIndex < PRInt32(rowCount)) && (aIndex != -1);

  // create the row
  nsCOMPtr<nsINodeInfo> nodeInfo;
  nsContentUtils::NameChanged(mNodeInfo, nsGkAtoms::tr,
                              getter_AddRefs(nodeInfo));

  nsCOMPtr<nsIContent> rowContent = NS_NewHTMLTableRowElement(nodeInfo.forget());
  if (!rowContent) {
    return NS_ERROR_OUT_OF_MEMORY;
  }

  nsCOMPtr<nsIDOMNode> rowNode(do_QueryInterface(rowContent));
  NS_ASSERTION(rowNode, "Should implement nsIDOMNode!");

  nsCOMPtr<nsIDOMNode> retChild;

  nsresult rv;
  if (doInsert) {
    nsCOMPtr<nsIDOMNode> refRow;
    rows->Item(aIndex, getter_AddRefs(refRow));

    rv = InsertBefore(rowNode, refRow, getter_AddRefs(retChild));
  } else {
    rv = AppendChild(rowNode, getter_AddRefs(retChild));
  }

  if (retChild) {
    CallQueryInterface(retChild, aValue);
  }

  return NS_OK;
}

NS_IMETHODIMP
nsHTMLTableSectionElement::DeleteRow(PRInt32 aValue)
{
  if (aValue < -1) {
    return NS_ERROR_DOM_INDEX_SIZE_ERR;
  }

  nsCOMPtr<nsIDOMHTMLCollection> rows;
  GetRows(getter_AddRefs(rows));

  nsresult rv;
  PRUint32 refIndex;
  if (aValue == -1) {
    rv = rows->GetLength(&refIndex);
    NS_ENSURE_SUCCESS(rv, rv);

    if (refIndex == 0) {
      return NS_OK;
    }

    --refIndex;
  }
  else {
    refIndex = (PRUint32)aValue;
  }

  nsCOMPtr<nsIDOMNode> row;
  rv = rows->Item(refIndex, getter_AddRefs(row));
  NS_ENSURE_SUCCESS(rv, rv);

  if (!row) {
    return NS_ERROR_DOM_INDEX_SIZE_ERR;
  }

  nsCOMPtr<nsIDOMNode> retChild;
  return RemoveChild(row, getter_AddRefs(retChild));
}

PRBool
nsHTMLTableSectionElement::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.ParseIntWithBounds(aValue, 0);
    }
    if (aAttribute == nsGkAtoms::height) {
      return aResult.ParseSpecialIntValue(aValue);
    }
    if (aAttribute == nsGkAtoms::align) {
      return ParseTableCellHAlignValue(aValue, aResult);
    }
    if (aAttribute == nsGkAtoms::bgcolor) {
      return aResult.ParseColor(aValue);
    }
    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->mSIDs & NS_STYLE_INHERIT_BIT(Position)) {
    // height: value
    nsCSSValue* height = aData->ValueForHeight();
    if (height->GetUnit() == eCSSUnit_Null) {
      const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::height);
      if (value && value->Type() == nsAttrValue::eInteger)
        height->SetFloatValue((float)value->GetIntegerValue(), eCSSUnit_Pixel);
    }
  }
  if (aData->mSIDs & NS_STYLE_INHERIT_BIT(Text)) {
    nsCSSValue* textAlign = aData->ValueForTextAlign();
    if (textAlign->GetUnit() == eCSSUnit_Null) {
      // align: enum
      const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::align);
      if (value && value->Type() == nsAttrValue::eEnum)
        textAlign->SetIntValue(value->GetEnumValue(), eCSSUnit_Enumerated);
    }
  }
  if (aData->mSIDs & NS_STYLE_INHERIT_BIT(TextReset)) {
    nsCSSValue* verticalAlign = aData->ValueForVerticalAlign();
    if (verticalAlign->GetUnit() == eCSSUnit_Null) {
      // valign: enum
      const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::valign);
      if (value && value->Type() == nsAttrValue::eEnum)
        verticalAlign->SetIntValue(value->GetEnumValue(), eCSSUnit_Enumerated);
    }
  }

  nsGenericHTMLElement::MapBackgroundAttributesInto(aAttributes, aData);
  nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aData);
}

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

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

  return FindAttributeDependence(aAttribute, map, NS_ARRAY_LENGTH(map));
}


nsMapRuleToAttributesFunc
nsHTMLTableSectionElement::GetAttributeMappingFunction() const
{
  return &MapAttributesIntoRule;
}
