зеркало из https://github.com/mozilla/pjs.git
82 строки
3.4 KiB
C++
82 строки
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Original Author: David W. Hyatt (hyatt@netscape.com)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsRuleData.h"
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#include "nsCSSProps.h"
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namespace {
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struct PropertyOffsetInfo {
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// XXX These could probably be pointer-to-member, if the casting can
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// be done correctly.
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size_t struct_offset; // offset of nsRuleDataThing* in nsRuleData
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size_t member_offset; // offset of value in nsRuleDataThing
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};
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const PropertyOffsetInfo kOffsetTable[eCSSProperty_COUNT_no_shorthands] = {
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#define CSS_PROP_BACKENDONLY(name_, id_, method_, flags_, datastruct_, \
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member_, kwtable_) \
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{ size_t(-1), size_t(-1) },
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#define CSS_PROP(name_, id_, method_, flags_, datastruct_, member_, \
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kwtable_, stylestruct_, stylestructoffset_, animtype_) \
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{ offsetof(nsRuleData, m##datastruct_##Data), \
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offsetof(nsRuleData##datastruct_, member_) },
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#include "nsCSSPropList.h"
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#undef CSS_PROP
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#undef CSS_PROP_BACKENDONLY
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};
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} // anon namespace
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nsCSSValue*
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nsRuleData::ValueFor(nsCSSProperty aProperty)
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{
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NS_ABORT_IF_FALSE(aProperty < eCSSProperty_COUNT_no_shorthands,
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"invalid or shorthand property");
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const PropertyOffsetInfo& offsets = kOffsetTable[aProperty];
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NS_ABORT_IF_FALSE(offsets.struct_offset != size_t(-1),
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"backend-only property");
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char* cssstruct = *reinterpret_cast<char**>
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(reinterpret_cast<char*>(this) + offsets.struct_offset);
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NS_ABORT_IF_FALSE(cssstruct, "substructure pointer should never be null");
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return reinterpret_cast<nsCSSValue*>(cssstruct + offsets.member_offset);
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}
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