зеркало из https://github.com/mozilla/gecko-dev.git
110 строки
3.7 KiB
C++
110 строки
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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/* atom list for CSS anonymous boxes */
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#ifndef nsCSSAnonBoxes_h___
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#define nsCSSAnonBoxes_h___
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#include "nsAtom.h"
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#include "nsGkAtoms.h"
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class nsCSSAnonBoxes {
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public:
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static bool IsAnonBox(nsAtom *aAtom);
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#ifdef MOZ_XUL
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static bool IsTreePseudoElement(nsAtom* aPseudo);
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#endif
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static bool IsNonElement(nsAtom* aPseudo)
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{
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return aPseudo == nsCSSAnonBoxes::mozText() ||
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aPseudo == nsCSSAnonBoxes::oofPlaceholder() ||
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aPseudo == nsCSSAnonBoxes::firstLetterContinuation();
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}
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typedef uint8_t NonInheritingBase;
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enum class NonInheriting : NonInheritingBase {
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#define CSS_ANON_BOX(_name, _value) /* nothing */
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#define CSS_NON_INHERITING_ANON_BOX(_name, _value) _name,
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#include "nsCSSAnonBoxList.h"
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#undef CSS_NON_INHERITING_ANON_BOX
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#undef CSS_ANON_BOX
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_Count
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};
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// Be careful using this: if we have a lot of non-inheriting anon box types it
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// might not be very fast. We may want to think of ways to handle that
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// (e.g. by moving to an enum instead of an atom, like we did for
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// pseudo-elements, or by adding a new value of the pseudo-element enum for
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// non-inheriting anon boxes or something).
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static bool IsNonInheritingAnonBox(nsAtom* aPseudo)
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{
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return
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#define CSS_ANON_BOX(_name, _value) /* nothing */
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#define CSS_NON_INHERITING_ANON_BOX(_name, _value) \
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nsGkAtoms::AnonBox_##_name == aPseudo ||
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#include "nsCSSAnonBoxList.h"
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#undef CSS_NON_INHERITING_ANON_BOX
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#undef CSS_ANON_BOX
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false;
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}
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#ifdef DEBUG
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// NOTE(emilio): DEBUG only because this does a pretty slow linear search. Try
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// to use IsNonInheritingAnonBox if you know the atom is an anon box already
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// or, even better, nothing like this. Note that this function returns true
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// for wrapper anon boxes as well, since they're all inheriting.
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static bool IsInheritingAnonBox(nsAtom* aPseudo)
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{
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return
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#define CSS_ANON_BOX(_name, _value) nsGkAtoms::AnonBox_##_name == aPseudo ||
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#define CSS_NON_INHERITING_ANON_BOX(_name, _value) /* nothing */
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#include "nsCSSAnonBoxList.h"
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#undef CSS_NON_INHERITING_ANON_BOX
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#undef CSS_ANON_BOX
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false;
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}
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#endif // DEBUG
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// This function is rather slow; you probably don't want to use it outside
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// asserts unless you have to.
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static bool IsWrapperAnonBox(nsAtom* aPseudo) {
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// We commonly get null passed here, and want to quickly return false for
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// it.
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return aPseudo &&
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(
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#define CSS_ANON_BOX(_name, _value) /* nothing */
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#define CSS_WRAPPER_ANON_BOX(_name, _value) nsGkAtoms::AnonBox_##_name == aPseudo ||
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#define CSS_NON_INHERITING_ANON_BOX(_name, _value) /* nothing */
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#include "nsCSSAnonBoxList.h"
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#undef CSS_NON_INHERITING_ANON_BOX
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#undef CSS_WRAPPER_ANON_BOX
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#undef CSS_ANON_BOX
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false);
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}
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// Get the NonInheriting type for a given pseudo tag. The pseudo tag must
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// test true for IsNonInheritingAnonBox.
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static NonInheriting NonInheritingTypeForPseudoTag(nsAtom* aPseudo);
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#ifdef DEBUG
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static void AssertAtoms();
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#endif
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// Alias nsCSSAnonBoxes::foo() to alias nsGkAtoms::AnonBox_foo.
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// XXX Once nsGkAtoms::AnonBox_foo become constexpr variables, these can too.
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// See bug 1449787.
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#define CSS_ANON_BOX(name_, value_) \
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static constexpr nsICSSAnonBoxPseudo* const& name_() \
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{ \
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return nsGkAtoms::AnonBox_##name_; \
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}
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#include "nsCSSAnonBoxList.h"
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#undef CSS_ANON_BOX
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};
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#endif /* nsCSSAnonBoxes_h___ */
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