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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/**
* nsStyledElement is the base for elements supporting styling via the
* id/class/style attributes; it is a common base for their support in HTML,
* SVG and MathML.
*/
#ifndef __NS_STYLEDELEMENT_H_
#define __NS_STYLEDELEMENT_H_
#include "mozilla/Attributes.h"
#include "mozilla/dom/Element.h"
#include "nsString.h"
namespace mozilla {
class DeclarationBlock;
struct MutationClosureData;
} // namespace mozilla
// IID for nsStyledElement interface
#define NS_STYLED_ELEMENT_IID \
{ \
0xacbd9ea6, 0x15aa, 0x4f37, { \
0x8c, 0xe0, 0x35, 0x1e, 0xd7, 0x21, 0xca, 0xe9 \
} \
}
using nsStyledElementBase = mozilla::dom::Element;
class nsStyledElement : public nsStyledElementBase {
protected:
inline explicit nsStyledElement(
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
: nsStyledElementBase(std::move(aNodeInfo)) {}
public:
// We don't want to implement AddRef/Release because that would add an extra
// function call for those on pretty much all elements. But we do need QI, so
// we can QI to nsStyledElement.
NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr) override;
// Element interface methods
virtual void InlineStyleDeclarationWillChange(
mozilla::MutationClosureData& aData) override;
virtual nsresult SetInlineStyleDeclaration(
mozilla::DeclarationBlock& aDeclaration,
mozilla::MutationClosureData& aData) override;
virtual nsresult BindToTree(BindContext& aContext, nsINode& aParent) override;
nsICSSDeclaration* Style();
NS_DECLARE_STATIC_IID_ACCESSOR(NS_STYLED_ELEMENT_IID)
NS_IMPL_FROMNODE_HELPER(nsStyledElement, IsStyledElement());
bool IsStyledElement() const final { return true; }
protected:
nsICSSDeclaration* GetExistingStyle();
/**
* Parse a style attr value into a CSS rulestruct (or, if there is no
* document, leave it as a string) and return as nsAttrValue.
*
* @param aValue the value to parse
* @param aMaybeScriptedPrincipal if available, the scripted principal
* responsible for this attribute value, as passed to
* Element::ParseAttribute.
* @param aResult the resulting HTMLValue [OUT]
*/
void ParseStyleAttribute(const nsAString& aValue,
nsIPrincipal* aMaybeScriptedPrincipal,
nsAttrValue& aResult, bool aForceInDataDoc);
bool ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
const nsAString& aValue,
nsIPrincipal* aMaybeScriptedPrincipal,
nsAttrValue& aResult) override;
friend class mozilla::dom::Element;
/**
* Create the style struct from the style attr. Used when an element is
* first put into a document. Only has an effect if the old value is a
* string. If aForceInDataDoc is true, will reparse even if we're in a data
* document.
*/
nsresult ReparseStyleAttribute(bool aForceInDataDoc);
void BeforeSetAttr(int32_t aNamespaceID, nsAtom* aName,
const nsAttrValue* aValue, bool aNotify) override;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsStyledElement, NS_STYLED_ELEMENT_IID)
#endif // __NS_STYLEDELEMENT_H_
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