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