зеркало из https://github.com/mozilla/gecko-dev.git
592 строки
16 KiB
C++
592 строки
16 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.org 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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*
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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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/* representation of simple property values within CSS declarations */
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#include "nsCSSValue.h"
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#include "nsString.h"
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#include "nsCSSProps.h"
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#include "nsReadableUtils.h"
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#include "imgIRequest.h"
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#include "nsIDocument.h"
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#include "nsContentUtils.h"
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#include "nsIPrincipal.h"
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#include "nsMathUtils.h"
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// Paint forcing
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#include "prenv.h"
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nsCSSValue::nsCSSValue(PRInt32 aValue, nsCSSUnit aUnit)
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: mUnit(aUnit)
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{
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NS_ASSERTION(aUnit == eCSSUnit_Integer || aUnit == eCSSUnit_Enumerated ||
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aUnit == eCSSUnit_EnumColor, "not an int value");
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if (aUnit == eCSSUnit_Integer || aUnit == eCSSUnit_Enumerated ||
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aUnit == eCSSUnit_EnumColor) {
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mValue.mInt = aValue;
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}
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else {
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mUnit = eCSSUnit_Null;
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mValue.mInt = 0;
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}
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}
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nsCSSValue::nsCSSValue(float aValue, nsCSSUnit aUnit)
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: mUnit(aUnit)
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{
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NS_ASSERTION(eCSSUnit_Percent <= aUnit, "not a float value");
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if (eCSSUnit_Percent <= aUnit) {
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mValue.mFloat = aValue;
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}
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else {
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mUnit = eCSSUnit_Null;
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mValue.mInt = 0;
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}
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}
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nsCSSValue::nsCSSValue(const nsString& aValue, nsCSSUnit aUnit)
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: mUnit(aUnit)
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{
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NS_ASSERTION(UnitHasStringValue(), "not a string value");
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if (UnitHasStringValue()) {
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mValue.mString = BufferFromString(aValue);
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if (NS_UNLIKELY(!mValue.mString)) {
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// XXXbz not much we can do here; just make sure that our promise of a
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// non-null mValue.mString holds for string units.
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mUnit = eCSSUnit_Null;
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}
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}
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else {
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mUnit = eCSSUnit_Null;
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mValue.mInt = 0;
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}
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}
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nsCSSValue::nsCSSValue(nsCSSValue::Array* aValue, nsCSSUnit aUnit)
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: mUnit(aUnit)
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{
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NS_ASSERTION(eCSSUnit_Array <= aUnit && aUnit <= eCSSUnit_Function,
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"bad unit");
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mValue.mArray = aValue;
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mValue.mArray->AddRef();
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}
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nsCSSValue::nsCSSValue(nsCSSValue::URL* aValue)
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: mUnit(eCSSUnit_URL)
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{
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mValue.mURL = aValue;
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mValue.mURL->AddRef();
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}
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nsCSSValue::nsCSSValue(nsCSSValue::Image* aValue)
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: mUnit(eCSSUnit_Image)
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{
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mValue.mImage = aValue;
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mValue.mImage->AddRef();
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}
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nsCSSValue::nsCSSValue(nsCSSValueGradient* aValue)
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: mUnit(eCSSUnit_Gradient)
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{
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mValue.mGradient = aValue;
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mValue.mGradient->AddRef();
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}
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nsCSSValue::nsCSSValue(const nsCSSValue& aCopy)
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: mUnit(aCopy.mUnit)
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{
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if (mUnit <= eCSSUnit_RectIsAuto) {
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// nothing to do, but put this important case first
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}
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else if (eCSSUnit_Percent <= mUnit) {
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mValue.mFloat = aCopy.mValue.mFloat;
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}
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else if (UnitHasStringValue()) {
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mValue.mString = aCopy.mValue.mString;
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mValue.mString->AddRef();
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}
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else if (eCSSUnit_Integer <= mUnit && mUnit <= eCSSUnit_EnumColor) {
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mValue.mInt = aCopy.mValue.mInt;
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}
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else if (eCSSUnit_Color == mUnit) {
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mValue.mColor = aCopy.mValue.mColor;
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}
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else if (eCSSUnit_Array <= mUnit && mUnit <= eCSSUnit_Function) {
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mValue.mArray = aCopy.mValue.mArray;
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mValue.mArray->AddRef();
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}
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else if (eCSSUnit_URL == mUnit) {
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mValue.mURL = aCopy.mValue.mURL;
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mValue.mURL->AddRef();
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}
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else if (eCSSUnit_Image == mUnit) {
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mValue.mImage = aCopy.mValue.mImage;
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mValue.mImage->AddRef();
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}
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else if (eCSSUnit_Gradient == mUnit) {
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mValue.mGradient = aCopy.mValue.mGradient;
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mValue.mGradient->AddRef();
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}
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else {
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NS_NOTREACHED("unknown unit");
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}
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}
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nsCSSValue& nsCSSValue::operator=(const nsCSSValue& aCopy)
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{
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if (this != &aCopy) {
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Reset();
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new (this) nsCSSValue(aCopy);
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}
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return *this;
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}
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PRBool nsCSSValue::operator==(const nsCSSValue& aOther) const
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{
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if (mUnit == aOther.mUnit) {
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if (mUnit <= eCSSUnit_RectIsAuto) {
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return PR_TRUE;
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}
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else if (UnitHasStringValue()) {
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return (NS_strcmp(GetBufferValue(mValue.mString),
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GetBufferValue(aOther.mValue.mString)) == 0);
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}
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else if ((eCSSUnit_Integer <= mUnit) && (mUnit <= eCSSUnit_EnumColor)) {
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return mValue.mInt == aOther.mValue.mInt;
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}
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else if (eCSSUnit_Color == mUnit) {
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return mValue.mColor == aOther.mValue.mColor;
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}
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else if (eCSSUnit_Array <= mUnit && mUnit <= eCSSUnit_Function) {
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return *mValue.mArray == *aOther.mValue.mArray;
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}
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else if (eCSSUnit_URL == mUnit) {
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return *mValue.mURL == *aOther.mValue.mURL;
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}
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else if (eCSSUnit_Image == mUnit) {
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return *mValue.mImage == *aOther.mValue.mImage;
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}
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else if (eCSSUnit_Gradient == mUnit) {
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return *mValue.mGradient == *aOther.mValue.mGradient;
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}
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else {
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return mValue.mFloat == aOther.mValue.mFloat;
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}
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}
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return PR_FALSE;
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}
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double nsCSSValue::GetAngleValueInRadians() const
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{
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double angle = GetFloatValue();
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switch (GetUnit()) {
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case eCSSUnit_Radian: return angle;
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case eCSSUnit_Degree: return angle * M_PI / 180.0;
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case eCSSUnit_Grad: return angle * M_PI / 200.0;
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default:
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NS_NOTREACHED("unrecognized angular unit");
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return 0.0;
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}
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}
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imgIRequest* nsCSSValue::GetImageValue() const
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{
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NS_ASSERTION(mUnit == eCSSUnit_Image, "not an Image value");
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return mValue.mImage->mRequest;
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}
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nscoord nsCSSValue::GetLengthTwips() const
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{
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NS_ASSERTION(IsFixedLengthUnit(), "not a fixed length unit");
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if (IsFixedLengthUnit()) {
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switch (mUnit) {
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case eCSSUnit_Inch:
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return NS_INCHES_TO_TWIPS(mValue.mFloat);
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case eCSSUnit_Millimeter:
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return NS_MILLIMETERS_TO_TWIPS(mValue.mFloat);
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case eCSSUnit_Centimeter:
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return NS_CENTIMETERS_TO_TWIPS(mValue.mFloat);
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case eCSSUnit_Point:
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return NS_POINTS_TO_TWIPS(mValue.mFloat);
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case eCSSUnit_Pica:
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return NS_PICAS_TO_TWIPS(mValue.mFloat);
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default:
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NS_ERROR("should never get here");
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break;
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}
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}
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return 0;
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}
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void nsCSSValue::DoReset()
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{
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if (UnitHasStringValue()) {
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mValue.mString->Release();
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} else if (eCSSUnit_Array <= mUnit && mUnit <= eCSSUnit_Function) {
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mValue.mArray->Release();
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} else if (eCSSUnit_URL == mUnit) {
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mValue.mURL->Release();
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} else if (eCSSUnit_Image == mUnit) {
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mValue.mImage->Release();
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} else if (eCSSUnit_Gradient == mUnit) {
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mValue.mGradient->Release();
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}
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mUnit = eCSSUnit_Null;
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}
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void nsCSSValue::SetIntValue(PRInt32 aValue, nsCSSUnit aUnit)
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{
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NS_ASSERTION(aUnit == eCSSUnit_Integer || aUnit == eCSSUnit_Enumerated ||
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aUnit == eCSSUnit_EnumColor, "not an int value");
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Reset();
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if (aUnit == eCSSUnit_Integer || aUnit == eCSSUnit_Enumerated ||
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aUnit == eCSSUnit_EnumColor) {
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mUnit = aUnit;
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mValue.mInt = aValue;
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}
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}
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void nsCSSValue::SetPercentValue(float aValue)
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{
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Reset();
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mUnit = eCSSUnit_Percent;
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mValue.mFloat = aValue;
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}
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void nsCSSValue::SetFloatValue(float aValue, nsCSSUnit aUnit)
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{
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NS_ASSERTION(eCSSUnit_Number <= aUnit, "not a float value");
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Reset();
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if (eCSSUnit_Number <= aUnit) {
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mUnit = aUnit;
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mValue.mFloat = aValue;
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}
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}
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void nsCSSValue::SetStringValue(const nsString& aValue,
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nsCSSUnit aUnit)
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{
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Reset();
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mUnit = aUnit;
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NS_ASSERTION(UnitHasStringValue(), "not a string unit");
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if (UnitHasStringValue()) {
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mValue.mString = BufferFromString(aValue);
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if (NS_UNLIKELY(!mValue.mString)) {
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// XXXbz not much we can do here; just make sure that our promise of a
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// non-null mValue.mString holds for string units.
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mUnit = eCSSUnit_Null;
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}
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} else
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mUnit = eCSSUnit_Null;
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}
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void nsCSSValue::SetColorValue(nscolor aValue)
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{
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Reset();
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mUnit = eCSSUnit_Color;
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mValue.mColor = aValue;
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}
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void nsCSSValue::SetArrayValue(nsCSSValue::Array* aValue, nsCSSUnit aUnit)
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{
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NS_ASSERTION(eCSSUnit_Array <= aUnit && aUnit <= eCSSUnit_Function,
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"bad unit");
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Reset();
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mUnit = aUnit;
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mValue.mArray = aValue;
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mValue.mArray->AddRef();
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}
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void nsCSSValue::SetURLValue(nsCSSValue::URL* aValue)
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{
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Reset();
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mUnit = eCSSUnit_URL;
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mValue.mURL = aValue;
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mValue.mURL->AddRef();
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}
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void nsCSSValue::SetImageValue(nsCSSValue::Image* aValue)
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{
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Reset();
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mUnit = eCSSUnit_Image;
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mValue.mImage = aValue;
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mValue.mImage->AddRef();
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}
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void nsCSSValue::SetGradientValue(nsCSSValueGradient* aValue)
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{
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Reset();
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mUnit = eCSSUnit_Gradient;
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mValue.mGradient = aValue;
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mValue.mGradient->AddRef();
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}
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void nsCSSValue::SetAutoValue()
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{
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Reset();
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mUnit = eCSSUnit_Auto;
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}
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void nsCSSValue::SetInheritValue()
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{
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Reset();
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mUnit = eCSSUnit_Inherit;
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}
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void nsCSSValue::SetInitialValue()
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{
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Reset();
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mUnit = eCSSUnit_Initial;
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}
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void nsCSSValue::SetNoneValue()
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{
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Reset();
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mUnit = eCSSUnit_None;
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}
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void nsCSSValue::SetAllValue()
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{
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Reset();
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mUnit = eCSSUnit_All;
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}
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void nsCSSValue::SetNormalValue()
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{
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Reset();
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mUnit = eCSSUnit_Normal;
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}
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void nsCSSValue::SetSystemFontValue()
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{
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Reset();
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mUnit = eCSSUnit_System_Font;
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}
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void nsCSSValue::SetDummyValue()
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{
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Reset();
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mUnit = eCSSUnit_Dummy;
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}
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void nsCSSValue::SetDummyInheritValue()
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{
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Reset();
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mUnit = eCSSUnit_DummyInherit;
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}
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void nsCSSValue::StartImageLoad(nsIDocument* aDocument) const
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{
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NS_PRECONDITION(eCSSUnit_URL == mUnit, "Not a URL value!");
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nsCSSValue::Image* image =
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new nsCSSValue::Image(mValue.mURL->mURI,
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mValue.mURL->mString,
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mValue.mURL->mReferrer,
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mValue.mURL->mOriginPrincipal,
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aDocument);
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if (image) {
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nsCSSValue* writable = const_cast<nsCSSValue*>(this);
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writable->SetImageValue(image);
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}
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}
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PRBool nsCSSValue::IsNonTransparentColor() const
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{
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// We have the value in the form it was specified in at this point, so we
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// have to look for both the keyword 'transparent' and its equivalent in
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// rgba notation.
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nsDependentString buf;
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return
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(mUnit == eCSSUnit_Color && NS_GET_A(GetColorValue()) > 0) ||
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(mUnit == eCSSUnit_Ident &&
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!nsGkAtoms::transparent->Equals(GetStringValue(buf))) ||
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(mUnit == eCSSUnit_EnumColor);
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}
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nsCSSValue::Array*
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nsCSSValue::InitFunction(nsCSSKeyword aFunctionId, PRUint32 aNumArgs)
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{
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nsRefPtr<nsCSSValue::Array> func = Array::Create(aNumArgs + 1);
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if (!func) {
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return nsnull;
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}
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func->Item(0).SetIntValue(aFunctionId, eCSSUnit_Enumerated);
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SetArrayValue(func, eCSSUnit_Function);
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return func;
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}
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PRBool
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nsCSSValue::EqualsFunction(nsCSSKeyword aFunctionId) const
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{
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if (mUnit != eCSSUnit_Function) {
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return PR_FALSE;
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}
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nsCSSValue::Array* func = mValue.mArray;
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NS_ABORT_IF_FALSE(func && func->Count() >= 1 &&
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func->Item(0).GetUnit() == eCSSUnit_Enumerated,
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"illegally structured function value");
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nsCSSKeyword thisFunctionId =
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static_cast<nsCSSKeyword>(func->Item(0).GetIntValue());
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return thisFunctionId == aFunctionId;
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}
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// static
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nsStringBuffer*
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nsCSSValue::BufferFromString(const nsString& aValue)
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{
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nsStringBuffer* buffer = nsStringBuffer::FromString(aValue);
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if (buffer) {
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buffer->AddRef();
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return buffer;
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}
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PRUnichar length = aValue.Length();
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buffer = nsStringBuffer::Alloc((length + 1) * sizeof(PRUnichar));
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if (NS_LIKELY(buffer != 0)) {
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PRUnichar* data = static_cast<PRUnichar*>(buffer->Data());
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nsCharTraits<PRUnichar>::copy(data, aValue.get(), length);
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// Null-terminate.
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data[length] = 0;
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}
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return buffer;
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}
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nsCSSValue::URL::URL(nsIURI* aURI, nsStringBuffer* aString, nsIURI* aReferrer,
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nsIPrincipal* aOriginPrincipal)
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: mURI(aURI),
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mString(aString),
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mReferrer(aReferrer),
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mOriginPrincipal(aOriginPrincipal)
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{
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NS_PRECONDITION(aOriginPrincipal, "Must have an origin principal");
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mString->AddRef();
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}
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nsCSSValue::URL::~URL()
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{
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mString->Release();
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}
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PRBool
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nsCSSValue::URL::operator==(const URL& aOther) const
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{
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PRBool eq;
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return NS_strcmp(GetBufferValue(mString),
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GetBufferValue(aOther.mString)) == 0 &&
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(mURI == aOther.mURI || // handles null == null
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(mURI && aOther.mURI &&
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NS_SUCCEEDED(mURI->Equals(aOther.mURI, &eq)) &&
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eq)) &&
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(mOriginPrincipal == aOther.mOriginPrincipal ||
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(NS_SUCCEEDED(mOriginPrincipal->Equals(aOther.mOriginPrincipal,
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&eq)) && eq));
|
|
}
|
|
|
|
PRBool
|
|
nsCSSValue::URL::URIEquals(const URL& aOther) const
|
|
{
|
|
PRBool eq;
|
|
// Worth comparing mURI to aOther.mURI and mOriginPrincipal to
|
|
// aOther.mOriginPrincipal, because in the (probably common) case when this
|
|
// value was one of the ones that in fact did not change this will be our
|
|
// fast path to equality
|
|
return (mURI == aOther.mURI ||
|
|
(NS_SUCCEEDED(mURI->Equals(aOther.mURI, &eq)) && eq)) &&
|
|
(mOriginPrincipal == aOther.mOriginPrincipal ||
|
|
(NS_SUCCEEDED(mOriginPrincipal->Equals(aOther.mOriginPrincipal,
|
|
&eq)) && eq));
|
|
}
|
|
|
|
nsCSSValue::Image::Image(nsIURI* aURI, nsStringBuffer* aString,
|
|
nsIURI* aReferrer, nsIPrincipal* aOriginPrincipal,
|
|
nsIDocument* aDocument)
|
|
: URL(aURI, aString, aReferrer, aOriginPrincipal)
|
|
{
|
|
if (mURI &&
|
|
nsContentUtils::CanLoadImage(mURI, aDocument, aDocument,
|
|
aOriginPrincipal)) {
|
|
nsContentUtils::LoadImage(mURI, aDocument, aOriginPrincipal, aReferrer,
|
|
nsnull, nsIRequest::LOAD_NORMAL,
|
|
getter_AddRefs(mRequest));
|
|
}
|
|
}
|
|
|
|
nsCSSValue::Image::~Image()
|
|
{
|
|
}
|
|
|
|
nsCSSValueGradientStop::nsCSSValueGradientStop()
|
|
: mLocation(eCSSUnit_None),
|
|
mColor(eCSSUnit_Null)
|
|
{
|
|
MOZ_COUNT_CTOR(nsCSSValueGradientStop);
|
|
}
|
|
|
|
nsCSSValueGradientStop::nsCSSValueGradientStop(const nsCSSValueGradientStop& aOther)
|
|
: mLocation(aOther.mLocation),
|
|
mColor(aOther.mColor)
|
|
{
|
|
MOZ_COUNT_CTOR(nsCSSValueGradientStop);
|
|
}
|
|
|
|
nsCSSValueGradientStop::~nsCSSValueGradientStop()
|
|
{
|
|
MOZ_COUNT_DTOR(nsCSSValueGradientStop);
|
|
}
|
|
|
|
nsCSSValueGradient::nsCSSValueGradient(PRBool aIsRadial,
|
|
PRBool aIsRepeating)
|
|
: mIsRadial(aIsRadial),
|
|
mIsRepeating(aIsRepeating),
|
|
mBgPosX(eCSSUnit_None),
|
|
mBgPosY(eCSSUnit_None),
|
|
mAngle(eCSSUnit_None),
|
|
mRadialShape(eCSSUnit_None),
|
|
mRadialSize(eCSSUnit_None)
|
|
{
|
|
}
|