/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Daniel Glazman * Mats Palmgren * Jonathon Jongsma , Collabora Ltd. * L. David Baron , Mozilla Corporation * * Alternatively, the contents of this file may be used under the terms of * either of the GNU General Public License Version 2 or later (the "GPL"), * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ /* * representation of a declaration block (or style attribute) in a CSS * stylesheet */ #include "nscore.h" #include "prlog.h" #include "nsCSSDeclaration.h" #include "nsString.h" #include "nsIAtom.h" #include "nsUnicharUtils.h" #include "nsReadableUtils.h" #include "nsCRT.h" #include "nsCSSProps.h" #include "nsFont.h" #include "nsReadableUtils.h" #include "nsStyleUtil.h" #include "nsStyleConsts.h" #include "nsCOMPtr.h" nsCSSDeclaration::nsCSSDeclaration() { // check that we can fit all the CSS properties into a PRUint8 // for the mOrder array - if not, might need to use PRUint16! PR_STATIC_ASSERT(eCSSProperty_COUNT_no_shorthands - 1 <= PR_UINT8_MAX); MOZ_COUNT_CTOR(nsCSSDeclaration); } nsCSSDeclaration::nsCSSDeclaration(const nsCSSDeclaration& aCopy) : mOrder(aCopy.mOrder), mData(aCopy.mData ? aCopy.mData->Clone() : already_AddRefed(nsnull)), mImportantData(aCopy.mImportantData ? aCopy.mImportantData->Clone() : already_AddRefed(nsnull)) { MOZ_COUNT_CTOR(nsCSSDeclaration); } nsCSSDeclaration::~nsCSSDeclaration(void) { MOZ_COUNT_DTOR(nsCSSDeclaration); } nsresult nsCSSDeclaration::ValueAppended(nsCSSProperty aProperty) { NS_ABORT_IF_FALSE(!nsCSSProps::IsShorthand(aProperty), "shorthands forbidden"); // order IS important for CSS, so remove and add to the end mOrder.RemoveElement(aProperty); mOrder.AppendElement(aProperty); return NS_OK; } nsresult nsCSSDeclaration::RemoveProperty(nsCSSProperty aProperty) { nsCSSExpandedDataBlock data; ExpandTo(&data); NS_ASSERTION(!mData && !mImportantData, "Expand didn't null things out"); if (nsCSSProps::IsShorthand(aProperty)) { CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(p, aProperty) { data.ClearProperty(*p); mOrder.RemoveElement(*p); } } else { data.ClearProperty(aProperty); mOrder.RemoveElement(aProperty); } CompressFrom(&data); return NS_OK; } nsresult nsCSSDeclaration::AppendComment(const nsAString& aComment) { return /* NS_ERROR_NOT_IMPLEMENTED, or not any longer that is */ NS_OK; } PRBool nsCSSDeclaration::AppendValueToString(nsCSSProperty aProperty, nsAString& aResult) const { nsCSSCompressedDataBlock *data = GetValueIsImportant(aProperty) ? mImportantData : mData; const void *storage = data->StorageFor(aProperty); return nsCSSDeclaration::AppendStorageToString(aProperty, storage, aResult); } /* static */ PRBool nsCSSDeclaration::AppendStorageToString(nsCSSProperty aProperty, const void* aStorage, nsAString& aResult) { if (aStorage) { switch (nsCSSProps::kTypeTable[aProperty]) { case eCSSType_Value: { const nsCSSValue *val = static_cast(aStorage); AppendCSSValueToString(aProperty, *val, aResult); } break; case eCSSType_Rect: { const nsCSSRect *rect = static_cast(aStorage); const nsCSSUnit topUnit = rect->mTop.GetUnit(); if (topUnit == eCSSUnit_Inherit || topUnit == eCSSUnit_Initial || topUnit == eCSSUnit_RectIsAuto) { NS_ASSERTION(rect->mRight.GetUnit() == topUnit && rect->mBottom.GetUnit() == topUnit && rect->mLeft.GetUnit() == topUnit, "parser should make all sides have the same unit"); if (topUnit == eCSSUnit_RectIsAuto) aResult.AppendLiteral("auto"); else AppendCSSValueToString(aProperty, rect->mTop, aResult); } else { aResult.AppendLiteral("rect("); AppendCSSValueToString(aProperty, rect->mTop, aResult); NS_NAMED_LITERAL_STRING(comma, ", "); aResult.Append(comma); AppendCSSValueToString(aProperty, rect->mRight, aResult); aResult.Append(comma); AppendCSSValueToString(aProperty, rect->mBottom, aResult); aResult.Append(comma); AppendCSSValueToString(aProperty, rect->mLeft, aResult); aResult.Append(PRUnichar(')')); } } break; case eCSSType_ValuePair: { const nsCSSValuePair *pair = static_cast(aStorage); AppendCSSValueToString(aProperty, pair->mXValue, aResult); if (pair->mYValue != pair->mXValue || ((aProperty == eCSSProperty_background_position || aProperty == eCSSProperty__moz_transform_origin) && pair->mXValue.GetUnit() != eCSSUnit_Inherit && pair->mXValue.GetUnit() != eCSSUnit_Initial) || (aProperty == eCSSProperty__moz_background_size && pair->mXValue.GetUnit() != eCSSUnit_Inherit && pair->mXValue.GetUnit() != eCSSUnit_Initial && pair->mXValue.GetUnit() != eCSSUnit_Enumerated)) { // Only output a Y value if it's different from the X value, // or if it's a background-position value other than 'initial' // or 'inherit', or if it's a -moz-transform-origin value other // than 'initial' or 'inherit', or if it's a -moz-background-size // value other than 'initial' or 'inherit' or 'contain' or 'cover'. aResult.Append(PRUnichar(' ')); AppendCSSValueToString(aProperty, pair->mYValue, aResult); } } break; case eCSSType_ValueList: { const nsCSSValueList* val = *static_cast(aStorage); do { AppendCSSValueToString(aProperty, val->mValue, aResult); val = val->mNext; if (val) { if (nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_VALUE_LIST_USES_COMMAS)) aResult.Append(PRUnichar(',')); aResult.Append(PRUnichar(' ')); } } while (val); } break; case eCSSType_ValuePairList: { const nsCSSValuePairList* item = *static_cast(aStorage); do { NS_ASSERTION(item->mXValue.GetUnit() != eCSSUnit_Null, "unexpected null unit"); AppendCSSValueToString(aProperty, item->mXValue, aResult); if (item->mXValue.GetUnit() != eCSSUnit_Inherit && item->mXValue.GetUnit() != eCSSUnit_Initial && item->mYValue.GetUnit() != eCSSUnit_Null) { aResult.Append(PRUnichar(' ')); AppendCSSValueToString(aProperty, item->mYValue, aResult); } item = item->mNext; if (item) { if (nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_VALUE_LIST_USES_COMMAS)) aResult.Append(PRUnichar(',')); aResult.Append(PRUnichar(' ')); } } while (item); } break; } } return aStorage != nsnull; } /* static */ PRBool nsCSSDeclaration::AppendCSSValueToString(nsCSSProperty aProperty, const nsCSSValue& aValue, nsAString& aResult) { nsCSSUnit unit = aValue.GetUnit(); if (eCSSUnit_Null == unit) { return PR_FALSE; } if (eCSSUnit_String <= unit && unit <= eCSSUnit_Attr) { if (unit == eCSSUnit_Attr) { aResult.AppendLiteral("attr("); } nsAutoString buffer; aValue.GetStringValue(buffer); if (unit == eCSSUnit_String) { nsStyleUtil::AppendEscapedCSSString(buffer, aResult); } else { aResult.Append(buffer); } } else if (eCSSUnit_Array <= unit && unit <= eCSSUnit_Cubic_Bezier) { switch (unit) { case eCSSUnit_Counter: aResult.AppendLiteral("counter("); break; case eCSSUnit_Counters: aResult.AppendLiteral("counters("); break; case eCSSUnit_Cubic_Bezier: aResult.AppendLiteral("cubic-bezier("); break; default: break; } nsCSSValue::Array *array = aValue.GetArrayValue(); PRBool mark = PR_FALSE; for (PRUint16 i = 0, i_end = array->Count(); i < i_end; ++i) { if (aProperty == eCSSProperty_border_image && i >= 5) { if (array->Item(i).GetUnit() == eCSSUnit_Null) { continue; } if (i == 5) { aResult.AppendLiteral(" /"); } } if (mark && array->Item(i).GetUnit() != eCSSUnit_Null) { if (unit == eCSSUnit_Array && eCSSProperty_transition_timing_function != aProperty) aResult.AppendLiteral(" "); else aResult.AppendLiteral(", "); } nsCSSProperty prop = ((eCSSUnit_Counter <= unit && unit <= eCSSUnit_Counters) && i == array->Count() - 1) ? eCSSProperty_list_style_type : aProperty; if (AppendCSSValueToString(prop, array->Item(i), aResult)) { mark = PR_TRUE; } } if (eCSSUnit_Array == unit && aProperty == eCSSProperty_transition_timing_function) { aResult.AppendLiteral(")"); } } /* Although Function is backed by an Array, we'll handle it separately * because it's a bit quirky. */ else if (eCSSUnit_Function == unit) { const nsCSSValue::Array* array = aValue.GetArrayValue(); NS_ASSERTION(array->Count() >= 1, "Functions must have at least one element for the name."); /* Append the function name. */ const nsCSSValue& functionName = array->Item(0); if (functionName.GetUnit() == eCSSUnit_Enumerated) { // We assume that the first argument is always of nsCSSKeyword type. const nsCSSKeyword functionId = static_cast(functionName.GetIntValue()); AppendASCIItoUTF16(nsCSSKeywords::GetStringValue(functionId), aResult); } else { AppendCSSValueToString(aProperty, functionName, aResult); } aResult.AppendLiteral("("); /* Now, step through the function contents, writing each of them as we go. */ for (PRUint16 index = 1; index < array->Count(); ++index) { AppendCSSValueToString(aProperty, array->Item(index), aResult); /* If we're not at the final element, append a comma. */ if (index + 1 != array->Count()) aResult.AppendLiteral(", "); } /* Finally, append the closing parenthesis. */ aResult.AppendLiteral(")"); } else if (eCSSUnit_Integer == unit) { nsAutoString tmpStr; tmpStr.AppendInt(aValue.GetIntValue(), 10); aResult.Append(tmpStr); } else if (eCSSUnit_Enumerated == unit) { if (eCSSProperty_text_decoration == aProperty) { PRInt32 intValue = aValue.GetIntValue(); if (NS_STYLE_TEXT_DECORATION_NONE == intValue) { AppendASCIItoUTF16(nsCSSProps::LookupPropertyValue(aProperty, intValue), aResult); } else { // Ignore the "override all" internal value. // (It doesn't have a string representation.) intValue &= ~NS_STYLE_TEXT_DECORATION_OVERRIDE_ALL; nsStyleUtil::AppendBitmaskCSSValue( aProperty, intValue, NS_STYLE_TEXT_DECORATION_UNDERLINE, NS_STYLE_TEXT_DECORATION_PREF_ANCHORS, aResult); } } else if (eCSSProperty_azimuth == aProperty) { PRInt32 intValue = aValue.GetIntValue(); AppendASCIItoUTF16(nsCSSProps::LookupPropertyValue(aProperty, (intValue & ~NS_STYLE_AZIMUTH_BEHIND)), aResult); if ((NS_STYLE_AZIMUTH_BEHIND & intValue) != 0) { aResult.Append(PRUnichar(' ')); AppendASCIItoUTF16(nsCSSProps::LookupPropertyValue(aProperty, NS_STYLE_AZIMUTH_BEHIND), aResult); } } else if (eCSSProperty_marks == aProperty) { PRInt32 intValue = aValue.GetIntValue(); if (intValue == NS_STYLE_PAGE_MARKS_NONE) { AppendASCIItoUTF16(nsCSSProps::LookupPropertyValue(aProperty, intValue), aResult); } else { nsStyleUtil::AppendBitmaskCSSValue(aProperty, intValue, NS_STYLE_PAGE_MARKS_CROP, NS_STYLE_PAGE_MARKS_REGISTER, aResult); } } else if (eCSSProperty_transition_property == aProperty) { AppendASCIItoUTF16(nsCSSProps::GetStringValue((nsCSSProperty) aValue.GetIntValue()), aResult); } else { const nsAFlatCString& name = nsCSSProps::LookupPropertyValue(aProperty, aValue.GetIntValue()); AppendASCIItoUTF16(name, aResult); } } else if (eCSSUnit_EnumColor == unit) { // we can lookup the property in the ColorTable and then // get a string mapping the name nsCAutoString str; if (nsCSSProps::GetColorName(aValue.GetIntValue(), str)){ AppendASCIItoUTF16(str, aResult); } else { NS_NOTREACHED("bad color value"); } } else if (eCSSUnit_Color == unit) { nscolor color = aValue.GetColorValue(); if (color == NS_RGBA(0, 0, 0, 0)) { // Use the strictest match for 'transparent' so we do correct // round-tripping of all other rgba() values. aResult.AppendLiteral("transparent"); } else { nsAutoString tmpStr; PRUint8 a = NS_GET_A(color); if (a < 255) { tmpStr.AppendLiteral("rgba("); } else { tmpStr.AppendLiteral("rgb("); } NS_NAMED_LITERAL_STRING(comma, ", "); tmpStr.AppendInt(NS_GET_R(color), 10); tmpStr.Append(comma); tmpStr.AppendInt(NS_GET_G(color), 10); tmpStr.Append(comma); tmpStr.AppendInt(NS_GET_B(color), 10); if (a < 255) { tmpStr.Append(comma); tmpStr.AppendFloat(nsStyleUtil::ColorComponentToFloat(a)); } tmpStr.Append(PRUnichar(')')); aResult.Append(tmpStr); } } else if (eCSSUnit_URL == unit || eCSSUnit_Image == unit) { aResult.Append(NS_LITERAL_STRING("url(")); nsStyleUtil::AppendEscapedCSSString( nsDependentString(aValue.GetOriginalURLValue()), aResult); aResult.Append(NS_LITERAL_STRING(")")); } else if (eCSSUnit_Percent == unit) { nsAutoString tmpStr; tmpStr.AppendFloat(aValue.GetPercentValue() * 100.0f); aResult.Append(tmpStr); } else if (eCSSUnit_Percent < unit) { // length unit nsAutoString tmpStr; tmpStr.AppendFloat(aValue.GetFloatValue()); aResult.Append(tmpStr); } else if (eCSSUnit_Gradient == unit) { nsCSSValueGradient* gradient = aValue.GetGradientValue(); if (gradient->mIsRepeating) { if (gradient->mIsRadial) aResult.AppendLiteral("-moz-repeating-radial-gradient("); else aResult.AppendLiteral("-moz-repeating-linear-gradient("); } else { if (gradient->mIsRadial) aResult.AppendLiteral("-moz-radial-gradient("); else aResult.AppendLiteral("-moz-linear-gradient("); } if (gradient->mBgPosX.GetUnit() != eCSSUnit_None || gradient->mBgPosY.GetUnit() != eCSSUnit_None || gradient->mAngle.GetUnit() != eCSSUnit_None) { if (gradient->mBgPosX.GetUnit() != eCSSUnit_None) { AppendCSSValueToString(eCSSProperty_background_position, gradient->mBgPosX, aResult); aResult.AppendLiteral(" "); } if (gradient->mBgPosY.GetUnit() != eCSSUnit_None) { AppendCSSValueToString(eCSSProperty_background_position, gradient->mBgPosY, aResult); aResult.AppendLiteral(" "); } if (gradient->mAngle.GetUnit() != eCSSUnit_None) { AppendCSSValueToString(aProperty, gradient->mAngle, aResult); } aResult.AppendLiteral(", "); } if (gradient->mIsRadial && (gradient->mRadialShape.GetUnit() != eCSSUnit_None || gradient->mRadialSize.GetUnit() != eCSSUnit_None)) { if (gradient->mRadialShape.GetUnit() != eCSSUnit_None) { NS_ASSERTION(gradient->mRadialShape.GetUnit() == eCSSUnit_Enumerated, "bad unit for radial gradient shape"); PRInt32 intValue = gradient->mRadialShape.GetIntValue(); NS_ASSERTION(intValue != NS_STYLE_GRADIENT_SHAPE_LINEAR, "radial gradient with linear shape?!"); AppendASCIItoUTF16(nsCSSProps::ValueToKeyword(intValue, nsCSSProps::kRadialGradientShapeKTable), aResult); aResult.AppendLiteral(" "); } if (gradient->mRadialSize.GetUnit() != eCSSUnit_None) { NS_ASSERTION(gradient->mRadialSize.GetUnit() == eCSSUnit_Enumerated, "bad unit for radial gradient size"); PRInt32 intValue = gradient->mRadialSize.GetIntValue(); AppendASCIItoUTF16(nsCSSProps::ValueToKeyword(intValue, nsCSSProps::kRadialGradientSizeKTable), aResult); } aResult.AppendLiteral(", "); } for (PRUint32 i = 0 ;;) { AppendCSSValueToString(aProperty, gradient->mStops[i].mColor, aResult); if (gradient->mStops[i].mLocation.GetUnit() != eCSSUnit_None) { aResult.AppendLiteral(" "); AppendCSSValueToString(aProperty, gradient->mStops[i].mLocation, aResult); } if (++i == gradient->mStops.Length()) { break; } aResult.AppendLiteral(", "); } aResult.AppendLiteral(")"); } switch (unit) { case eCSSUnit_Null: break; case eCSSUnit_Auto: aResult.AppendLiteral("auto"); break; case eCSSUnit_Inherit: aResult.AppendLiteral("inherit"); break; case eCSSUnit_Initial: aResult.AppendLiteral("-moz-initial"); break; case eCSSUnit_None: aResult.AppendLiteral("none"); break; case eCSSUnit_Normal: aResult.AppendLiteral("normal"); break; case eCSSUnit_System_Font: aResult.AppendLiteral("-moz-use-system-font"); break; case eCSSUnit_All: aResult.AppendLiteral("all"); break; case eCSSUnit_Dummy: case eCSSUnit_DummyInherit: case eCSSUnit_RectIsAuto: NS_NOTREACHED("should never serialize"); break; case eCSSUnit_String: break; case eCSSUnit_Ident: break; case eCSSUnit_Families: break; case eCSSUnit_URL: break; case eCSSUnit_Image: break; case eCSSUnit_Array: break; case eCSSUnit_Attr: case eCSSUnit_Cubic_Bezier: case eCSSUnit_Counter: case eCSSUnit_Counters: aResult.Append(PRUnichar(')')); break; case eCSSUnit_Local_Font: break; case eCSSUnit_Font_Format: break; case eCSSUnit_Function: break; case eCSSUnit_Integer: break; case eCSSUnit_Enumerated: break; case eCSSUnit_EnumColor: break; case eCSSUnit_Color: break; case eCSSUnit_Percent: aResult.Append(PRUnichar('%')); break; case eCSSUnit_Number: break; case eCSSUnit_Gradient: break; case eCSSUnit_Inch: aResult.AppendLiteral("in"); break; case eCSSUnit_Millimeter: aResult.AppendLiteral("mm"); break; case eCSSUnit_Centimeter: aResult.AppendLiteral("cm"); break; case eCSSUnit_Point: aResult.AppendLiteral("pt"); break; case eCSSUnit_Pica: aResult.AppendLiteral("pc"); break; case eCSSUnit_EM: aResult.AppendLiteral("em"); break; case eCSSUnit_XHeight: aResult.AppendLiteral("ex"); break; case eCSSUnit_Char: aResult.AppendLiteral("ch"); break; case eCSSUnit_RootEM: aResult.AppendLiteral("rem"); break; case eCSSUnit_Pixel: aResult.AppendLiteral("px"); break; case eCSSUnit_Degree: aResult.AppendLiteral("deg"); break; case eCSSUnit_Grad: aResult.AppendLiteral("grad"); break; case eCSSUnit_Radian: aResult.AppendLiteral("rad"); break; case eCSSUnit_Hertz: aResult.AppendLiteral("Hz"); break; case eCSSUnit_Kilohertz: aResult.AppendLiteral("kHz"); break; case eCSSUnit_Seconds: aResult.Append(PRUnichar('s')); break; case eCSSUnit_Milliseconds: aResult.AppendLiteral("ms"); break; } return PR_TRUE; } nsresult nsCSSDeclaration::GetValue(nsCSSProperty aProperty, nsAString& aValue) const { aValue.Truncate(0); // simple properties are easy. if (!nsCSSProps::IsShorthand(aProperty)) { AppendValueToString(aProperty, aValue); return NS_OK; } // DOM Level 2 Style says (when describing CSS2Properties, although // not CSSStyleDeclaration.getPropertyValue): // However, if there is no shorthand declaration that could be added // to the ruleset without changing in any way the rules already // declared in the ruleset (i.e., by adding longhand rules that were // previously not declared in the ruleset), then the empty string // should be returned for the shorthand property. // This means we need to check a number of cases: // (1) Since a shorthand sets all sub-properties, if some of its // subproperties were not specified, we must return the empty // string. // (2) Since 'inherit' and 'initial' can only be specified as the // values for entire properties, we need to return the empty // string if some but not all of the subproperties have one of // those values. // (3) Since a single value only makes sense with or without // !important, we return the empty string if some values are // !important and some are not. // Since we're doing this check for 'inherit' and 'initial' up front, // we can also simplify the property serialization code by serializing // those values up front as well. PRUint32 totalCount = 0, importantCount = 0, initialCount = 0, inheritCount = 0; CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(p, aProperty) { if (*p == eCSSProperty__x_system_font || nsCSSProps::PropHasFlags(*p, CSS_PROPERTY_DIRECTIONAL_SOURCE)) { // The system-font subproperty and the *-source properties don't count. continue; } ++totalCount; const void *storage = mData->StorageFor(*p); NS_ASSERTION(!storage || !mImportantData || !mImportantData->StorageFor(*p), "can't be in both blocks"); if (!storage && mImportantData) { ++importantCount; storage = mImportantData->StorageFor(*p); } if (!storage) { // Case (1) above: some subproperties not specified. return NS_OK; } nsCSSUnit unit; switch (nsCSSProps::kTypeTable[*p]) { case eCSSType_Value: { const nsCSSValue *val = static_cast(storage); unit = val->GetUnit(); } break; case eCSSType_Rect: { const nsCSSRect *rect = static_cast(storage); unit = rect->mTop.GetUnit(); } break; case eCSSType_ValuePair: { const nsCSSValuePair *pair = static_cast(storage); unit = pair->mXValue.GetUnit(); } break; case eCSSType_ValueList: { const nsCSSValueList* item = *static_cast(storage); NS_ABORT_IF_FALSE(item, "null not allowed in compressed block"); unit = item->mValue.GetUnit(); } break; case eCSSType_ValuePairList: { const nsCSSValuePairList* item = *static_cast(storage); NS_ABORT_IF_FALSE(item, "null not allowed in compressed block"); unit = item->mXValue.GetUnit(); } break; } if (unit == eCSSUnit_Inherit) { ++inheritCount; } else if (unit == eCSSUnit_Initial) { ++initialCount; } } if (importantCount != 0 && importantCount != totalCount) { // Case (3), no consistent importance. return NS_OK; } if (initialCount == totalCount) { // Simplify serialization below by serializing initial up-front. AppendCSSValueToString(eCSSProperty_UNKNOWN, nsCSSValue(eCSSUnit_Initial), aValue); return NS_OK; } if (inheritCount == totalCount) { // Simplify serialization below by serializing inherit up-front. AppendCSSValueToString(eCSSProperty_UNKNOWN, nsCSSValue(eCSSUnit_Inherit), aValue); return NS_OK; } if (initialCount != 0 || inheritCount != 0) { // Case (2): partially initial or inherit. return NS_OK; } nsCSSCompressedDataBlock *data = importantCount ? mImportantData : mData; switch (aProperty) { case eCSSProperty_margin: case eCSSProperty_padding: case eCSSProperty_border_color: case eCSSProperty_border_style: case eCSSProperty_border_width: { const nsCSSProperty* subprops = nsCSSProps::SubpropertyEntryFor(aProperty); NS_ASSERTION(nsCSSProps::kTypeTable[subprops[0]] == eCSSType_Value && nsCSSProps::kTypeTable[subprops[1]] == eCSSType_Value && nsCSSProps::kTypeTable[subprops[2]] == eCSSType_Value && nsCSSProps::kTypeTable[subprops[3]] == eCSSType_Value, "type mismatch"); NS_ASSERTION(nsCSSProps::GetStringValue(subprops[0]).Find("-top") != kNotFound, "first subprop must be top"); NS_ASSERTION(nsCSSProps::GetStringValue(subprops[1]).Find("-right") != kNotFound, "second subprop must be right"); NS_ASSERTION(nsCSSProps::GetStringValue(subprops[2]).Find("-bottom") != kNotFound, "third subprop must be bottom"); NS_ASSERTION(nsCSSProps::GetStringValue(subprops[3]).Find("-left") != kNotFound, "fourth subprop must be left"); const nsCSSValue &topValue = *data->ValueStorageFor(subprops[0]); const nsCSSValue &rightValue = *data->ValueStorageFor(subprops[1]); const nsCSSValue &bottomValue = *data->ValueStorageFor(subprops[2]); const nsCSSValue &leftValue = *data->ValueStorageFor(subprops[3]); PRBool haveValue; haveValue = AppendCSSValueToString(subprops[0], topValue, aValue); NS_ASSERTION(haveValue, "should have bailed before"); if (topValue != rightValue || topValue != leftValue || topValue != bottomValue) { aValue.Append(PRUnichar(' ')); haveValue = AppendCSSValueToString(subprops[1], rightValue, aValue); NS_ASSERTION(haveValue, "should have bailed before"); if (topValue != bottomValue || rightValue != leftValue) { aValue.Append(PRUnichar(' ')); haveValue = AppendCSSValueToString(subprops[2], bottomValue, aValue); NS_ASSERTION(haveValue, "should have bailed before"); if (rightValue != leftValue) { aValue.Append(PRUnichar(' ')); haveValue = AppendCSSValueToString(subprops[3], leftValue, aValue); NS_ASSERTION(haveValue, "should have bailed before"); } } } break; } case eCSSProperty__moz_border_radius: case eCSSProperty__moz_outline_radius: { const nsCSSProperty* subprops = nsCSSProps::SubpropertyEntryFor(aProperty); NS_ASSERTION(nsCSSProps::kTypeTable[subprops[0]] == eCSSType_ValuePair && nsCSSProps::kTypeTable[subprops[1]] == eCSSType_ValuePair && nsCSSProps::kTypeTable[subprops[2]] == eCSSType_ValuePair && nsCSSProps::kTypeTable[subprops[3]] == eCSSType_ValuePair, "type mismatch"); const nsCSSValuePair* vals[4] = { data->ValuePairStorageFor(subprops[0]), data->ValuePairStorageFor(subprops[1]), data->ValuePairStorageFor(subprops[2]), data->ValuePairStorageFor(subprops[3]) }; AppendCSSValueToString(aProperty, vals[0]->mXValue, aValue); aValue.Append(PRUnichar(' ')); AppendCSSValueToString(aProperty, vals[1]->mXValue, aValue); aValue.Append(PRUnichar(' ')); AppendCSSValueToString(aProperty, vals[2]->mXValue, aValue); aValue.Append(PRUnichar(' ')); AppendCSSValueToString(aProperty, vals[3]->mXValue, aValue); // For compatibility, only write a slash and the y-values // if they're not identical to the x-values. if (vals[0]->mXValue != vals[0]->mYValue || vals[1]->mXValue != vals[1]->mYValue || vals[2]->mXValue != vals[2]->mYValue || vals[3]->mXValue != vals[3]->mYValue) { aValue.AppendLiteral(" / "); AppendCSSValueToString(aProperty, vals[0]->mYValue, aValue); aValue.Append(PRUnichar(' ')); AppendCSSValueToString(aProperty, vals[1]->mYValue, aValue); aValue.Append(PRUnichar(' ')); AppendCSSValueToString(aProperty, vals[2]->mYValue, aValue); aValue.Append(PRUnichar(' ')); AppendCSSValueToString(aProperty, vals[3]->mYValue, aValue); } break; } case eCSSProperty_border: { const nsCSSProperty* subproptables[3] = { nsCSSProps::SubpropertyEntryFor(eCSSProperty_border_color), nsCSSProps::SubpropertyEntryFor(eCSSProperty_border_style), nsCSSProps::SubpropertyEntryFor(eCSSProperty_border_width) }; PRBool match = PR_TRUE; for (const nsCSSProperty** subprops = subproptables, **subprops_end = subproptables + NS_ARRAY_LENGTH(subproptables); subprops < subprops_end; ++subprops) { // Check only the first four subprops in each table, since the // others are extras for dimensional box properties. const nsCSSValue *firstSide = data->ValueStorageFor((*subprops)[0]); for (PRInt32 side = 1; side < 4; ++side) { const nsCSSValue *otherSide = data->ValueStorageFor((*subprops)[side]); if (*firstSide != *otherSide) match = PR_FALSE; } } if (!match) { // We can't express what we have in the border shorthand break; } // tweak aProperty and fall through aProperty = eCSSProperty_border_top; } case eCSSProperty_border_top: case eCSSProperty_border_right: case eCSSProperty_border_bottom: case eCSSProperty_border_left: case eCSSProperty_border_start: case eCSSProperty_border_end: case eCSSProperty__moz_column_rule: case eCSSProperty_outline: { const nsCSSProperty* subprops = nsCSSProps::SubpropertyEntryFor(aProperty); NS_ASSERTION(nsCSSProps::kTypeTable[subprops[0]] == eCSSType_Value && nsCSSProps::kTypeTable[subprops[1]] == eCSSType_Value && nsCSSProps::kTypeTable[subprops[2]] == eCSSType_Value, "type mismatch"); NS_ASSERTION(StringEndsWith(nsCSSProps::GetStringValue(subprops[2]), NS_LITERAL_CSTRING("-color")) || StringEndsWith(nsCSSProps::GetStringValue(subprops[2]), NS_LITERAL_CSTRING("-color-value")), "third subprop must be the color property"); const nsCSSValue *colorValue = data->ValueStorageFor(subprops[2]); PRBool isMozUseTextColor = colorValue->GetUnit() == eCSSUnit_Enumerated && colorValue->GetIntValue() == NS_STYLE_COLOR_MOZ_USE_TEXT_COLOR; if (!AppendValueToString(subprops[0], aValue) || !(aValue.Append(PRUnichar(' ')), AppendValueToString(subprops[1], aValue)) || // Don't output a third value when it's -moz-use-text-color. !(isMozUseTextColor || (aValue.Append(PRUnichar(' ')), AppendValueToString(subprops[2], aValue)))) { aValue.Truncate(); } break; } case eCSSProperty_margin_left: case eCSSProperty_margin_right: case eCSSProperty_margin_start: case eCSSProperty_margin_end: case eCSSProperty_padding_left: case eCSSProperty_padding_right: case eCSSProperty_padding_start: case eCSSProperty_padding_end: case eCSSProperty_border_left_color: case eCSSProperty_border_left_style: case eCSSProperty_border_left_width: case eCSSProperty_border_right_color: case eCSSProperty_border_right_style: case eCSSProperty_border_right_width: case eCSSProperty_border_start_color: case eCSSProperty_border_start_style: case eCSSProperty_border_start_width: case eCSSProperty_border_end_color: case eCSSProperty_border_end_style: case eCSSProperty_border_end_width: { const nsCSSProperty* subprops = nsCSSProps::SubpropertyEntryFor(aProperty); NS_ASSERTION(subprops[3] == eCSSProperty_UNKNOWN, "not box property with physical vs. logical cascading"); AppendValueToString(subprops[0], aValue); break; } case eCSSProperty_background: { // We know from above that all subproperties were specified. // However, we still can't represent that in the shorthand unless // they're all lists of the same length. So if they're different // lengths, we need to bail out. // We also need to bail out if an item has background-clip and // background-origin that are different and not the default // values. (We omit them if they're both default.) const nsCSSValueList *image = * data->ValueListStorageFor(eCSSProperty_background_image); const nsCSSValueList *repeat = * data->ValueListStorageFor(eCSSProperty_background_repeat); const nsCSSValueList *attachment = * data->ValueListStorageFor(eCSSProperty_background_attachment); const nsCSSValuePairList *position = * data->ValuePairListStorageFor(eCSSProperty_background_position); const nsCSSValueList *clip = * data->ValueListStorageFor(eCSSProperty__moz_background_clip); const nsCSSValueList *origin = * data->ValueListStorageFor(eCSSProperty__moz_background_origin); const nsCSSValuePairList *size = * data->ValuePairListStorageFor(eCSSProperty__moz_background_size); for (;;) { AppendCSSValueToString(eCSSProperty_background_image, image->mValue, aValue); aValue.Append(PRUnichar(' ')); AppendCSSValueToString(eCSSProperty_background_repeat, repeat->mValue, aValue); aValue.Append(PRUnichar(' ')); AppendCSSValueToString(eCSSProperty_background_attachment, attachment->mValue, aValue); aValue.Append(PRUnichar(' ')); AppendCSSValueToString(eCSSProperty_background_position, position->mXValue, aValue); aValue.Append(PRUnichar(' ')); AppendCSSValueToString(eCSSProperty_background_position, position->mYValue, aValue); NS_ASSERTION(clip->mValue.GetUnit() == eCSSUnit_Enumerated && origin->mValue.GetUnit() == eCSSUnit_Enumerated, "should not be inherit/initial within list and " "should have returned early for real inherit/initial"); if (clip->mValue.GetIntValue() != NS_STYLE_BG_CLIP_BORDER || origin->mValue.GetIntValue() != NS_STYLE_BG_ORIGIN_PADDING) { #if 0 // This is commented out for now until we change // -moz-background-clip to background-clip, -moz-background-origin // to background-origin, change their value names to *-box, and add // support for content-box on background-clip. PR_STATIC_ASSERT(NS_STYLE_BG_CLIP_BORDER == NS_STYLE_BG_ORIGIN_BORDER); PR_STATIC_ASSERT(NS_STYLE_BG_CLIP_PADDING == NS_STYLE_BG_ORIGIN_PADDING); // PR_STATIC_ASSERT(NS_STYLE_BG_CLIP_CONTENT == /* does not exist */ // NS_STYLE_BG_ORIGIN_CONTENT); if (clip->mValue != origin->mValue) { aValue.Truncate(); return NS_OK; } aValue.Append(PRUnichar(' ')); AppendCSSValueToString(eCSSProperty__moz_background_clip, clip->mValue, aValue); #else aValue.Truncate(); return NS_OK; #endif } image = image->mNext; repeat = repeat->mNext; attachment = attachment->mNext; position = position->mNext; clip = clip->mNext; origin = origin->mNext; size = size->mNext; if (!image) { if (repeat || attachment || position || clip || origin || size) { // Uneven length lists, so can't be serialized as shorthand. aValue.Truncate(); return NS_OK; } break; } if (!repeat || !attachment || !position || !clip || !origin || !size) { // Uneven length lists, so can't be serialized as shorthand. aValue.Truncate(); return NS_OK; } aValue.Append(PRUnichar(',')); aValue.Append(PRUnichar(' ')); } aValue.Append(PRUnichar(' ')); AppendValueToString(eCSSProperty_background_color, aValue); break; } case eCSSProperty_cue: { if (AppendValueToString(eCSSProperty_cue_before, aValue)) { aValue.Append(PRUnichar(' ')); if (!AppendValueToString(eCSSProperty_cue_after, aValue)) aValue.Truncate(); } break; } case eCSSProperty_font: { // systemFont might not be present; the others are guaranteed to be // based on the shorthand check at the beginning of the function const nsCSSValue *systemFont = data->ValueStorageFor(eCSSProperty__x_system_font); const nsCSSValue &style = *data->ValueStorageFor(eCSSProperty_font_style); const nsCSSValue &variant = *data->ValueStorageFor(eCSSProperty_font_variant); const nsCSSValue &weight = *data->ValueStorageFor(eCSSProperty_font_weight); const nsCSSValue &size = *data->ValueStorageFor(eCSSProperty_font_size); const nsCSSValue &lh = *data->ValueStorageFor(eCSSProperty_line_height); const nsCSSValue &family = *data->ValueStorageFor(eCSSProperty_font_family); const nsCSSValue &stretch = *data->ValueStorageFor(eCSSProperty_font_stretch); const nsCSSValue &sizeAdjust = *data->ValueStorageFor(eCSSProperty_font_size_adjust); if (systemFont && systemFont->GetUnit() != eCSSUnit_None && systemFont->GetUnit() != eCSSUnit_Null) { if (style.GetUnit() != eCSSUnit_System_Font || variant.GetUnit() != eCSSUnit_System_Font || weight.GetUnit() != eCSSUnit_System_Font || size.GetUnit() != eCSSUnit_System_Font || lh.GetUnit() != eCSSUnit_System_Font || family.GetUnit() != eCSSUnit_System_Font || stretch.GetUnit() != eCSSUnit_System_Font || sizeAdjust.GetUnit() != eCSSUnit_System_Font) { // This can't be represented as a shorthand. return NS_OK; } AppendCSSValueToString(eCSSProperty__x_system_font, *systemFont, aValue); } else { // The font-stretch and font-size-adjust // properties are reset by this shorthand property to their // initial values, but can't be represented in its syntax. if (stretch.GetUnit() != eCSSUnit_Enumerated || stretch.GetIntValue() != NS_STYLE_FONT_STRETCH_NORMAL || sizeAdjust.GetUnit() != eCSSUnit_None) { return NS_OK; } if (style.GetUnit() != eCSSUnit_Enumerated || style.GetIntValue() != NS_FONT_STYLE_NORMAL) { AppendCSSValueToString(eCSSProperty_font_style, style, aValue); aValue.Append(PRUnichar(' ')); } if (variant.GetUnit() != eCSSUnit_Enumerated || variant.GetIntValue() != NS_FONT_VARIANT_NORMAL) { AppendCSSValueToString(eCSSProperty_font_variant, variant, aValue); aValue.Append(PRUnichar(' ')); } if (weight.GetUnit() != eCSSUnit_Enumerated || weight.GetIntValue() != NS_FONT_WEIGHT_NORMAL) { AppendCSSValueToString(eCSSProperty_font_weight, weight, aValue); aValue.Append(PRUnichar(' ')); } AppendCSSValueToString(eCSSProperty_font_size, size, aValue); if (lh.GetUnit() != eCSSUnit_Normal) { aValue.Append(PRUnichar('/')); AppendCSSValueToString(eCSSProperty_line_height, lh, aValue); } aValue.Append(PRUnichar(' ')); AppendCSSValueToString(eCSSProperty_font_family, family, aValue); } break; } case eCSSProperty_list_style: if (AppendValueToString(eCSSProperty_list_style_type, aValue)) aValue.Append(PRUnichar(' ')); if (AppendValueToString(eCSSProperty_list_style_position, aValue)) aValue.Append(PRUnichar(' ')); AppendValueToString(eCSSProperty_list_style_image, aValue); break; case eCSSProperty_overflow: { const nsCSSValue &xValue = *data->ValueStorageFor(eCSSProperty_overflow_x); const nsCSSValue &yValue = *data->ValueStorageFor(eCSSProperty_overflow_y); if (xValue == yValue) AppendCSSValueToString(eCSSProperty_overflow_x, xValue, aValue); break; } case eCSSProperty_pause: { if (AppendValueToString(eCSSProperty_pause_before, aValue)) { aValue.Append(PRUnichar(' ')); if (!AppendValueToString(eCSSProperty_pause_after, aValue)) aValue.Truncate(); } break; } case eCSSProperty_transition: { #define NUM_TRANSITION_SUBPROPS 4 const nsCSSProperty* subprops = nsCSSProps::SubpropertyEntryFor(aProperty); #ifdef DEBUG for (int i = 0; i < NUM_TRANSITION_SUBPROPS; ++i) { NS_ASSERTION(nsCSSProps::kTypeTable[subprops[i]] == eCSSType_ValueList, "type mismatch"); } NS_ASSERTION(subprops[NUM_TRANSITION_SUBPROPS] == eCSSProperty_UNKNOWN, "length mismatch"); #endif const nsCSSValueList* val[NUM_TRANSITION_SUBPROPS]; for (int i = 0; i < NUM_TRANSITION_SUBPROPS; ++i) { val[i] = *data->ValueListStorageFor(subprops[i]); } // Merge the lists of the subproperties into a single list. for (;;) { for (int i = 0; i < NUM_TRANSITION_SUBPROPS; ++i) { AppendCSSValueToString(subprops[i], val[i]->mValue, aValue); aValue.Append(PRUnichar(' ')); val[i] = val[i]->mNext; } // Remove the last space. aValue.Truncate(aValue.Length() - 1); PR_STATIC_ASSERT(NUM_TRANSITION_SUBPROPS == 4); if (!val[0] || !val[1] || !val[2] || !val[3]) { break; } aValue.AppendLiteral(", "); } PR_STATIC_ASSERT(NUM_TRANSITION_SUBPROPS == 4); if (val[0] || val[1] || val[2] || val[3]) { // The sublists are different lengths, so this can't be // represented as the shorthand. aValue.Truncate(); } #undef NUM_TRANSITION_SUBPROPS break; } #ifdef MOZ_SVG case eCSSProperty_marker: { const nsCSSValue &endValue = *data->ValueStorageFor(eCSSProperty_marker_end); const nsCSSValue &midValue = *data->ValueStorageFor(eCSSProperty_marker_mid); const nsCSSValue &startValue = *data->ValueStorageFor(eCSSProperty_marker_start); if (endValue == midValue && midValue == startValue) AppendValueToString(eCSSProperty_marker_end, aValue); break; } #endif default: NS_NOTREACHED("no other shorthands"); break; } return NS_OK; } PRBool nsCSSDeclaration::GetValueIsImportant(const nsAString& aProperty) const { nsCSSProperty propID = nsCSSProps::LookupProperty(aProperty); return GetValueIsImportant(propID); } PRBool nsCSSDeclaration::GetValueIsImportant(nsCSSProperty aProperty) const { if (!mImportantData) return PR_FALSE; // Calling StorageFor is inefficient, but we can assume '!important' // is rare. if (nsCSSProps::IsShorthand(aProperty)) { CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(p, aProperty) { if (*p == eCSSProperty__x_system_font) { // The system_font subproperty doesn't count. continue; } if (!mImportantData->StorageFor(*p)) { return PR_FALSE; } } return PR_TRUE; } return mImportantData->StorageFor(aProperty) != nsnull; } /* static */ void nsCSSDeclaration::AppendImportanceToString(PRBool aIsImportant, nsAString& aString) { if (aIsImportant) { aString.AppendLiteral(" ! important"); } } void nsCSSDeclaration::AppendPropertyAndValueToString(nsCSSProperty aProperty, nsAutoString& aValue, nsAString& aResult) const { NS_ASSERTION(0 <= aProperty && aProperty < eCSSProperty_COUNT, "property enum out of range"); NS_ASSERTION((aProperty < eCSSProperty_COUNT_no_shorthands) == aValue.IsEmpty(), "aValue should be given for shorthands but not longhands"); AppendASCIItoUTF16(nsCSSProps::GetStringValue(aProperty), aResult); aResult.AppendLiteral(": "); if (aValue.IsEmpty()) AppendValueToString(aProperty, aResult); else aResult.Append(aValue); PRBool isImportant = GetValueIsImportant(aProperty); AppendImportanceToString(isImportant, aResult); aResult.AppendLiteral("; "); } nsresult nsCSSDeclaration::ToString(nsAString& aString) const { nsCSSCompressedDataBlock *systemFontData = GetValueIsImportant(eCSSProperty__x_system_font) ? mImportantData : mData; const nsCSSValue *systemFont = systemFontData->ValueStorageFor(eCSSProperty__x_system_font); const PRBool haveSystemFont = systemFont && systemFont->GetUnit() != eCSSUnit_None && systemFont->GetUnit() != eCSSUnit_Null; PRBool didSystemFont = PR_FALSE; PRInt32 count = mOrder.Length(); PRInt32 index; nsAutoTArray shorthandsUsed; for (index = 0; index < count; index++) { nsCSSProperty property = OrderValueAt(index); PRBool doneProperty = PR_FALSE; // If we already used this property in a shorthand, skip it. if (shorthandsUsed.Length() > 0) { for (const nsCSSProperty *shorthands = nsCSSProps::ShorthandsContaining(property); *shorthands != eCSSProperty_UNKNOWN; ++shorthands) { if (shorthandsUsed.Contains(*shorthands)) { doneProperty = PR_TRUE; break; } } if (doneProperty) continue; } // Try to use this property in a shorthand. nsAutoString value; for (const nsCSSProperty *shorthands = nsCSSProps::ShorthandsContaining(property); *shorthands != eCSSProperty_UNKNOWN; ++shorthands) { // ShorthandsContaining returns the shorthands in order from those // that contain the most subproperties to those that contain the // least, which is exactly the order we want to test them. nsCSSProperty shorthand = *shorthands; // If GetValue gives us a non-empty string back, we can use that // value; otherwise it's not possible to use this shorthand. GetValue(shorthand, value); if (!value.IsEmpty()) { AppendPropertyAndValueToString(shorthand, value, aString); shorthandsUsed.AppendElement(shorthand); doneProperty = PR_TRUE; break; } NS_ASSERTION(shorthand != eCSSProperty_font || *(shorthands + 1) == eCSSProperty_UNKNOWN, "font should always be the only containing shorthand"); if (shorthand == eCSSProperty_font) { if (haveSystemFont && !didSystemFont) { // Output the shorthand font declaration that we will // partially override later. But don't add it to // |shorthandsUsed|, since we will have to override it. AppendCSSValueToString(eCSSProperty__x_system_font, *systemFont, value); AppendPropertyAndValueToString(eCSSProperty_font, value, aString); value.Truncate(); didSystemFont = PR_TRUE; } // That we output the system font is enough for this property if: // (1) it's the hidden system font subproperty (which either // means we output it or we don't have it), or // (2) its value is the hidden system font value and it matches // the hidden system font subproperty in importance, and // we output the system font subproperty. NS_ASSERTION(nsCSSProps::kTypeTable[property] == eCSSType_Value, "not a value typed subproperty"); const nsCSSValue *val = systemFontData->ValueStorageFor(property); if (property == eCSSProperty__x_system_font || (haveSystemFont && val && val->GetUnit() == eCSSUnit_System_Font)) { doneProperty = PR_TRUE; } } } if (doneProperty) continue; NS_ASSERTION(value.IsEmpty(), "value should be empty now"); AppendPropertyAndValueToString(property, value, aString); } if (! aString.IsEmpty()) { // if the string is not empty, we have a trailing whitespace we should remove aString.Truncate(aString.Length() - 1); } return NS_OK; } #ifdef DEBUG void nsCSSDeclaration::List(FILE* out, PRInt32 aIndent) const { for (PRInt32 index = aIndent; --index >= 0; ) fputs(" ", out); fputs("{ ", out); nsAutoString s; ToString(s); fputs(NS_ConvertUTF16toUTF8(s).get(), out); fputs("}", out); } #endif nsresult nsCSSDeclaration::GetNthProperty(PRUint32 aIndex, nsAString& aReturn) const { aReturn.Truncate(); if (aIndex < mOrder.Length()) { nsCSSProperty property = OrderValueAt(aIndex); if (0 <= property) { AppendASCIItoUTF16(nsCSSProps::GetStringValue(property), aReturn); } } return NS_OK; } nsCSSDeclaration* nsCSSDeclaration::Clone() const { return new nsCSSDeclaration(*this); } PRBool nsCSSDeclaration::InitializeEmpty() { NS_ASSERTION(!mData && !mImportantData, "already initialized"); mData = nsCSSCompressedDataBlock::CreateEmptyBlock(); return mData != nsnull; } PRBool nsCSSDeclaration::EnsureMutable() { if (!mData->IsMutable()) { nsRefPtr newBlock = mData->Clone(); if (!newBlock) { return PR_FALSE; } newBlock.swap(mData); } if (mImportantData && !mImportantData->IsMutable()) { nsRefPtr newBlock = mImportantData->Clone(); if (!newBlock) { return PR_FALSE; } newBlock.swap(mImportantData); } return PR_TRUE; }