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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
/* base class for DOM objects for element.style and cssStyleRule.style */
#ifndef nsDOMCSSDeclaration_h___
#define nsDOMCSSDeclaration_h___
#include "nsICSSDeclaration.h"
#include "mozilla/Attributes.h"
#include "nsIURI.h"
#include "nsCOMPtr.h"
class nsIPrincipal;
class nsIDocument;
struct JSContext;
class JSObject;
namespace mozilla {
class DeclarationBlock;
namespace css {
class Loader;
class Rule;
} // namespace css
} // namespace mozilla
class nsDOMCSSDeclaration : public nsICSSDeclaration
{
public:
// Only implement QueryInterface; subclasses have the responsibility
// of implementing AddRef/Release.
NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr) override;
// Declare addref and release so they can be called on us, but don't
// implement them. Our subclasses must handle their own
// refcounting.
NS_IMETHOD_(MozExternalRefCountType) AddRef() override = 0;
NS_IMETHOD_(MozExternalRefCountType) Release() override = 0;
NS_DECL_NSICSSDECLARATION
using nsICSSDeclaration::GetLength;
// Require subclasses to implement |GetParentRule|.
//NS_DECL_NSIDOMCSSSTYLEDECLARATION
NS_IMETHOD GetCssText(nsAString & aCssText) override;
NS_IMETHOD SetCssText(const nsAString & aCssText) override;
NS_IMETHOD GetPropertyValue(const nsAString & propertyName,
nsAString & _retval) override;
virtual already_AddRefed<mozilla::dom::CSSValue>
GetPropertyCSSValue(const nsAString & propertyName,
mozilla::ErrorResult& aRv) override;
using nsICSSDeclaration::GetPropertyCSSValue;
NS_IMETHOD RemoveProperty(const nsAString & propertyName,
nsAString & _retval) override;
NS_IMETHOD GetPropertyPriority(const nsAString & propertyName,
nsAString & _retval) override;
NS_IMETHOD SetProperty(const nsAString & propertyName,
const nsAString & value, const nsAString & priority) override;
NS_IMETHOD GetLength(uint32_t *aLength) override;
NS_IMETHOD GetParentRule(nsIDOMCSSRule * *aParentRule) override = 0;
// WebIDL interface for CSS2Properties
#define CSS_PROP_PUBLIC_OR_PRIVATE(publicname_, privatename_) publicname_
#define CSS_PROP(name_, id_, method_, flags_, pref_, parsevariant_, \
kwtable_, stylestruct_, stylestructoffset_, animtype_) \
void \
Get##method_(nsAString& aValue, mozilla::ErrorResult& rv) \
{ \
rv = GetPropertyValue(eCSSProperty_##id_, aValue); \
} \
\
void \
Set##method_(const nsAString& aValue, mozilla::ErrorResult& rv) \
{ \
rv = SetPropertyValue(eCSSProperty_##id_, aValue); \
}
#define CSS_PROP_LIST_EXCLUDE_INTERNAL
#define CSS_PROP_LIST_INCLUDE_LOGICAL
#define CSS_PROP_SHORTHAND(name_, id_, method_, flags_, pref_) \
CSS_PROP(name_, id_, method_, flags_, pref_, X, X, X, X, X)
#include "nsCSSPropList.h"
#define CSS_PROP_ALIAS(aliasname_, propid_, aliasmethod_, pref_) \
CSS_PROP(X, propid_, aliasmethod_, X, pref_, X, X, X, X, X)
#include "nsCSSPropAliasList.h"
#undef CSS_PROP_ALIAS
#undef CSS_PROP_SHORTHAND
#undef CSS_PROP_LIST_INCLUDE_LOGICAL
#undef CSS_PROP_LIST_EXCLUDE_INTERNAL
#undef CSS_PROP
#undef CSS_PROP_PUBLIC_OR_PRIVATE
virtual void IndexedGetter(uint32_t aIndex, bool& aFound, nsAString& aPropName) override;
virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
protected:
// The reason for calling GetCSSDeclaration.
enum Operation {
// We are calling GetCSSDeclaration so that we can read from it. Does not
// allocate a new declaration if we don't have one yet; returns nullptr in
// this case.
eOperation_Read,
// We are calling GetCSSDeclaration so that we can set a property on it
// or re-parse the whole declaration. Allocates a new declaration if we
// don't have one yet and calls AttributeWillChange. A nullptr return value
// indicates an error allocating the declaration.
eOperation_Modify,
// We are calling GetCSSDeclaration so that we can remove a property from
// it. Does not allocates a new declaration if we don't have one yet;
// returns nullptr in this case. If we do have a declaration, calls
// AttributeWillChange.
eOperation_RemoveProperty
};
virtual mozilla::DeclarationBlock* GetCSSDeclaration(Operation aOperation) = 0;
virtual nsresult SetCSSDeclaration(mozilla::DeclarationBlock* aDecl) = 0;
// Document that we must call BeginUpdate/EndUpdate on around the
// calls to SetCSSDeclaration and the style rule mutation that leads
// to it.
virtual nsIDocument* DocToUpdate() = 0;
// Information neded to parse a declaration. We need the mSheetURI
// for error reporting, mBaseURI to resolve relative URIs,
// mPrincipal for subresource loads, and mCSSLoader for determining
// whether we're in quirks mode. mBaseURI needs to be a strong
// pointer because of xml:base possibly creating base URIs on the
// fly. This is why we don't use CSSParsingEnvironment as a return
// value, to avoid multiple-refcounting of mBaseURI.
struct CSSParsingEnvironment {
nsIURI* MOZ_UNSAFE_REF("user of CSSParsingEnviroment must hold an owning "
"reference; reference counting here has unacceptable "
"performance overhead (see bug 649163)") mSheetURI;
nsCOMPtr<nsIURI> mBaseURI;
nsIPrincipal* MOZ_UNSAFE_REF("user of CSSParsingEnviroment must hold an owning "
"reference; reference counting here has unacceptable "
"performance overhead (see bug 649163)") mPrincipal;
mozilla::css::Loader* MOZ_UNSAFE_REF("user of CSSParsingEnviroment must hold an owning "
"reference; reference counting here has unacceptable "
"performance overhead (see bug 649163)") mCSSLoader;
};
// On failure, mPrincipal should be set to null in aCSSParseEnv.
// If mPrincipal is null, the other members may not be set to
// anything meaningful.
virtual void GetCSSParsingEnvironment(CSSParsingEnvironment& aCSSParseEnv) = 0;
// An implementation for GetCSSParsingEnvironment for callers wrapping
// an css::Rule.
static void GetCSSParsingEnvironmentForRule(mozilla::css::Rule* aRule,
CSSParsingEnvironment& aCSSParseEnv);
nsresult ParsePropertyValue(const nsCSSPropertyID aPropID,
const nsAString& aPropValue,
bool aIsImportant);
nsresult ParseCustomPropertyValue(const nsAString& aPropertyName,
const nsAString& aPropValue,
bool aIsImportant);
nsresult RemovePropertyInternal(nsCSSPropertyID aPropID);
nsresult RemovePropertyInternal(const nsAString& aProperty);
protected:
virtual ~nsDOMCSSDeclaration();
};
#endif // nsDOMCSSDeclaration_h___
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