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nsHTMLBRElement.cpp
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
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00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is Mozilla Communicator client code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either of the GNU General Public License Version 2 or later (the "GPL"),
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00036  * ***** END LICENSE BLOCK ***** */
00037 #include "nsIDOMHTMLBRElement.h"
00038 #include "nsIDOMEventReceiver.h"
00039 #include "nsGenericHTMLElement.h"
00040 #include "nsHTMLAtoms.h"
00041 #include "nsStyleConsts.h"
00042 #include "nsPresContext.h"
00043 #include "nsMappedAttributes.h"
00044 #include "nsRuleData.h"
00045 
00046 class nsHTMLBRElement : public nsGenericHTMLElement,
00047                         public nsIDOMHTMLBRElement
00048 {
00049 public:
00050   nsHTMLBRElement(nsINodeInfo *aNodeInfo);
00051   virtual ~nsHTMLBRElement();
00052 
00053   // nsISupports
00054   NS_DECL_ISUPPORTS_INHERITED
00055 
00056   // nsIDOMNode
00057   NS_FORWARD_NSIDOMNODE_NO_CLONENODE(nsGenericHTMLElement::)
00058 
00059   // nsIDOMElement
00060   NS_FORWARD_NSIDOMELEMENT(nsGenericHTMLElement::)
00061 
00062   // nsIDOMHTMLElement
00063   NS_FORWARD_NSIDOMHTMLELEMENT(nsGenericHTMLElement::)
00064 
00065   // nsIDOMHTMLBRElement
00066   NS_DECL_NSIDOMHTMLBRELEMENT    
00067 
00068   virtual PRBool ParseAttribute(nsIAtom* aAttribute,
00069                                 const nsAString& aValue,
00070                                 nsAttrValue& aResult);
00071   NS_IMETHOD_(PRBool) IsAttributeMapped(const nsIAtom* aAttribute) const;
00072   virtual nsMapRuleToAttributesFunc GetAttributeMappingFunction() const;
00073 };
00074 
00075 
00076 NS_IMPL_NS_NEW_HTML_ELEMENT(BR)
00077 
00078 
00079 nsHTMLBRElement::nsHTMLBRElement(nsINodeInfo *aNodeInfo)
00080   : nsGenericHTMLElement(aNodeInfo)
00081 {
00082 }
00083 
00084 nsHTMLBRElement::~nsHTMLBRElement()
00085 {
00086 }
00087 
00088 NS_IMPL_ADDREF_INHERITED(nsHTMLBRElement, nsGenericElement) 
00089 NS_IMPL_RELEASE_INHERITED(nsHTMLBRElement, nsGenericElement) 
00090 
00091 
00092 // QueryInterface implementation for nsHTMLBRElement
00093 NS_HTML_CONTENT_INTERFACE_MAP_BEGIN(nsHTMLBRElement, nsGenericHTMLElement)
00094   NS_INTERFACE_MAP_ENTRY(nsIDOMHTMLBRElement)
00095   NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(HTMLBRElement)
00096 NS_HTML_CONTENT_INTERFACE_MAP_END
00097 
00098 
00099 NS_IMPL_DOM_CLONENODE(nsHTMLBRElement)
00100 
00101 
00102 NS_IMPL_STRING_ATTR(nsHTMLBRElement, Clear, clear)
00103 
00104 static const nsAttrValue::EnumTable kClearTable[] = {
00105   { "left", NS_STYLE_CLEAR_LEFT },
00106   { "right", NS_STYLE_CLEAR_RIGHT },
00107   { "all", NS_STYLE_CLEAR_LEFT_AND_RIGHT },
00108   { "both", NS_STYLE_CLEAR_LEFT_AND_RIGHT },
00109   { 0 }
00110 };
00111 
00112 PRBool
00113 nsHTMLBRElement::ParseAttribute(nsIAtom* aAttribute,
00114                                 const nsAString& aValue,
00115                                 nsAttrValue& aResult)
00116 {
00117   if (aAttribute == nsHTMLAtoms::clear) {
00118     return aResult.ParseEnumValue(aValue, kClearTable);
00119   }
00120 
00121   return nsGenericHTMLElement::ParseAttribute(aAttribute, aValue, aResult);
00122 }
00123 
00124 static void
00125 MapAttributesIntoRule(const nsMappedAttributes* aAttributes,
00126                       nsRuleData* aData)
00127 {
00128   if (aData->mSID == eStyleStruct_Display) {
00129     if (aData->mDisplayData->mClear.GetUnit() == eCSSUnit_Null) {
00130       const nsAttrValue* value = aAttributes->GetAttr(nsHTMLAtoms::clear);
00131       if (value && value->Type() == nsAttrValue::eEnum)
00132         aData->mDisplayData->mClear.SetIntValue(value->GetEnumValue(), eCSSUnit_Enumerated);
00133     }
00134   }
00135 
00136   nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aData);
00137 }
00138 
00139 NS_IMETHODIMP_(PRBool)
00140 nsHTMLBRElement::IsAttributeMapped(const nsIAtom* aAttribute) const
00141 {
00142   static const MappedAttributeEntry attributes[] = {
00143     { &nsHTMLAtoms::clear },
00144     { nsnull }
00145   };
00146 
00147   static const MappedAttributeEntry* const map[] = {
00148     attributes,
00149     sCommonAttributeMap,
00150   };
00151 
00152   return FindAttributeDependence(aAttribute, map, NS_ARRAY_LENGTH(map));
00153 }
00154 
00155 nsMapRuleToAttributesFunc
00156 nsHTMLBRElement::GetAttributeMappingFunction() const
00157 {
00158   return &MapAttributesIntoRule;
00159 }