gecko-dev/layout/style/nsDOMCSSDeclaration.h
Xidorn Quan e09ca4aedc Bug 1069192 part 2 - Add a flag for chrome-only properties and change semantics of enabling flags. r=dbaron
This patch changes the semantics of enabling flags so that their presence makes
the property default to off when there is no pref, and also removes "ALWAYS"
from their name to match.

--HG--
extra : source : 12d33074485c080dfdffff703b88662baa628b51
2015-10-03 11:12:09 +10:00

178 lines
7.8 KiB
C++

/* -*- 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 {
namespace css {
class Declaration;
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::css::Declaration* GetCSSDeclaration(Operation aOperation) = 0;
virtual nsresult SetCSSDeclaration(mozilla::css::Declaration* 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 nsCSSProperty aPropID,
const nsAString& aPropValue,
bool aIsImportant);
// Prop-id based version of RemoveProperty. Note that this does not
// return the old value; it just does a straight removal.
nsresult RemoveProperty(const nsCSSProperty aPropID);
void GetCustomPropertyValue(const nsAString& aPropertyName, nsAString& aValue);
nsresult RemoveCustomProperty(const nsAString& aPropertyName);
nsresult ParseCustomPropertyValue(const nsAString& aPropertyName,
const nsAString& aPropValue,
bool aIsImportant);
protected:
virtual ~nsDOMCSSDeclaration();
};
#endif // nsDOMCSSDeclaration_h___