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Diffstat (limited to 'layout/style/nsROCSSPrimitiveValue.cpp')
| -rw-r--r-- | layout/style/nsROCSSPrimitiveValue.cpp | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/layout/style/nsROCSSPrimitiveValue.cpp b/layout/style/nsROCSSPrimitiveValue.cpp new file mode 100644 index 0000000000..c8e46d8aab --- /dev/null +++ b/layout/style/nsROCSSPrimitiveValue.cpp @@ -0,0 +1,217 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* DOM object representing values in DOM computed style */ + +#include "nsROCSSPrimitiveValue.h" + +#include "mozilla/ErrorResult.h" +#include "nsPresContext.h" +#include "nsStyleUtil.h" +#include "nsIURI.h" +#include "nsError.h" + +using namespace mozilla; +using namespace mozilla::dom; + +nsROCSSPrimitiveValue::nsROCSSPrimitiveValue() : CSSValue(), mType(CSS_PX) { + mValue.mFloat = 0.0f; +} + +nsROCSSPrimitiveValue::~nsROCSSPrimitiveValue() { Reset(); } + +void nsROCSSPrimitiveValue::GetCssText(nsString& aCssText, ErrorResult& aRv) { + nsAutoString tmpStr; + aCssText.Truncate(); + + switch (mType) { + case CSS_PX: { + nsStyleUtil::AppendCSSNumber(mValue.mFloat, tmpStr); + tmpStr.AppendLiteral("px"); + break; + } + case CSS_STRING: { + tmpStr.Append(mValue.mString); + break; + } + case CSS_URI: { + if (mValue.mURI) { + nsAutoCString specUTF8; + nsresult rv = mValue.mURI->GetSpec(specUTF8); + if (NS_FAILED(rv)) { + aRv.ThrowInvalidStateError("Can't get URL string for url()"); + return; + } + + tmpStr.AssignLiteral("url("); + nsStyleUtil::AppendEscapedCSSString(NS_ConvertUTF8toUTF16(specUTF8), + tmpStr); + tmpStr.Append(')'); + } else { + // http://dev.w3.org/csswg/css3-values/#attr defines + // 'about:invalid' as the default value for url attributes, + // so let's also use it here as the default computed value + // for invalid URLs. + tmpStr.AssignLiteral(u"url(about:invalid)"); + } + break; + } + case CSS_PERCENTAGE: { + nsStyleUtil::AppendCSSNumber(mValue.mFloat * 100, tmpStr); + tmpStr.Append(char16_t('%')); + break; + } + case CSS_NUMBER: { + nsStyleUtil::AppendCSSNumber(mValue.mFloat, tmpStr); + break; + } + case CSS_NUMBER_INT32: { + tmpStr.AppendInt(mValue.mInt32); + break; + } + case CSS_NUMBER_UINT32: { + tmpStr.AppendInt(mValue.mUint32); + break; + } + case CSS_DEG: { + nsStyleUtil::AppendCSSNumber(mValue.mFloat, tmpStr); + tmpStr.AppendLiteral("deg"); + break; + } + case CSS_S: { + nsStyleUtil::AppendCSSNumber(mValue.mFloat, tmpStr); + tmpStr.Append('s'); + break; + } + case CSS_CM: + case CSS_MM: + case CSS_IN: + case CSS_PT: + case CSS_PC: + case CSS_UNKNOWN: + case CSS_EMS: + case CSS_EXS: + case CSS_MS: + case CSS_HZ: + case CSS_KHZ: + case CSS_DIMENSION: + NS_ERROR("We have a bogus value set. This should not happen"); + aRv.ThrowInvalidAccessError("Unexpected value in computed style"); + return; + } + + aCssText.Assign(tmpStr); +} + +uint16_t nsROCSSPrimitiveValue::CssValueType() const { + return CSSValue::CSS_PRIMITIVE_VALUE; +} + +void nsROCSSPrimitiveValue::SetNumber(float aValue) { + Reset(); + mValue.mFloat = aValue; + mType = CSS_NUMBER; +} + +void nsROCSSPrimitiveValue::SetNumber(int32_t aValue) { + Reset(); + mValue.mInt32 = aValue; + mType = CSS_NUMBER_INT32; +} + +void nsROCSSPrimitiveValue::SetNumber(uint32_t aValue) { + Reset(); + mValue.mUint32 = aValue; + mType = CSS_NUMBER_UINT32; +} + +void nsROCSSPrimitiveValue::SetPercent(float aValue) { + Reset(); + mValue.mFloat = aValue; + mType = CSS_PERCENTAGE; +} + +void nsROCSSPrimitiveValue::SetDegree(float aValue) { + Reset(); + mValue.mFloat = aValue; + mType = CSS_DEG; +} + +void nsROCSSPrimitiveValue::SetAppUnits(nscoord aValue) { + SetPixels(nsPresContext::AppUnitsToFloatCSSPixels(aValue)); +} + +void nsROCSSPrimitiveValue::SetPixels(float aValue) { + Reset(); + mValue.mFloat = aValue; + mType = CSS_PX; +} + +void nsROCSSPrimitiveValue::SetAppUnits(float aValue) { + SetAppUnits(NSToCoordRound(aValue)); +} + +void nsROCSSPrimitiveValue::SetString(const nsACString& aString) { + Reset(); + mValue.mString = ToNewUnicode(aString, mozilla::fallible); + if (mValue.mString) { + mType = CSS_STRING; + } else { + // XXXcaa We should probably let the caller know we are out of memory + mType = CSS_UNKNOWN; + } +} + +void nsROCSSPrimitiveValue::SetString(const nsAString& aString) { + Reset(); + mValue.mString = ToNewUnicode(aString, mozilla::fallible); + if (mValue.mString) { + mType = CSS_STRING; + } else { + // XXXcaa We should probably let the caller know we are out of memory + mType = CSS_UNKNOWN; + } +} + +void nsROCSSPrimitiveValue::SetURI(nsIURI* aURI) { + Reset(); + mValue.mURI = aURI; + NS_IF_ADDREF(mValue.mURI); + mType = CSS_URI; +} + +void nsROCSSPrimitiveValue::SetTime(float aValue) { + Reset(); + mValue.mFloat = aValue; + mType = CSS_S; +} + +void nsROCSSPrimitiveValue::Reset() { + switch (mType) { + case CSS_STRING: + NS_ASSERTION(mValue.mString, "Null string should never happen"); + free(mValue.mString); + mValue.mString = nullptr; + break; + case CSS_URI: + NS_IF_RELEASE(mValue.mURI); + break; + } + + mType = CSS_UNKNOWN; +} + +uint16_t nsROCSSPrimitiveValue::PrimitiveType() { + // New value types were introduced but not added to CSS OM. + // Return CSS_UNKNOWN to avoid exposing CSS_TURN to content. + if (mType > CSS_RGBCOLOR) { + if (mType == CSS_NUMBER_INT32 || mType == CSS_NUMBER_UINT32) { + return CSS_NUMBER; + } + return CSS_UNKNOWN; + } + return mType; +} |