gecko/layout/style/nsROCSSPrimitiveValue.cpp

652 lines
15 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/dom/CSSPrimitiveValueBinding.h"
#include "nsContentUtils.h"
#include "nsPresContext.h"
#include "nsStyleUtil.h"
#include "nsDOMCSSRGBColor.h"
#include "nsDOMCSSRect.h"
#include "nsIURI.h"
#include "nsError.h"
using namespace mozilla;
nsROCSSPrimitiveValue::nsROCSSPrimitiveValue()
: CSSValue(), mType(CSS_PX)
{
mValue.mAppUnits = 0;
SetIsDOMBinding();
}
nsROCSSPrimitiveValue::~nsROCSSPrimitiveValue()
{
Reset();
}
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsROCSSPrimitiveValue)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsROCSSPrimitiveValue)
// QueryInterface implementation for nsROCSSPrimitiveValue
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsROCSSPrimitiveValue)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSPrimitiveValue)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSValue)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, CSSValue)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(nsROCSSPrimitiveValue)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsROCSSPrimitiveValue)
if (tmp->mType == CSS_URI) {
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(mValue.mURI)
} else if (tmp->mType == CSS_RGBCOLOR) {
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(mValue.mColor)
} else if (tmp->mType == CSS_RECT) {
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(mValue.mRect)
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsROCSSPrimitiveValue)
NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
tmp->Reset();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
JSObject*
nsROCSSPrimitiveValue::WrapObject(JSContext *cx, JSObject *scope,
bool *triedToWrap)
{
return dom::CSSPrimitiveValueBinding::Wrap(cx, scope, this, triedToWrap);
}
// nsIDOMCSSValue
NS_IMETHODIMP
nsROCSSPrimitiveValue::GetCssText(nsAString& aCssText)
{
nsAutoString tmpStr;
aCssText.Truncate();
nsresult result = NS_OK;
switch (mType) {
case CSS_PX :
{
float val = nsPresContext::AppUnitsToFloatCSSPixels(mValue.mAppUnits);
tmpStr.AppendFloat(val);
tmpStr.AppendLiteral("px");
break;
}
case CSS_IDENT :
{
AppendUTF8toUTF16(nsCSSKeywords::GetStringValue(mValue.mKeyword),
tmpStr);
break;
}
case CSS_STRING :
case CSS_COUNTER : /* FIXME: COUNTER should use an object */
{
tmpStr.Append(mValue.mString);
break;
}
case CSS_URI :
{
if (mValue.mURI) {
nsAutoCString specUTF8;
mValue.mURI->GetSpec(specUTF8);
tmpStr.AssignLiteral("url(");
nsStyleUtil::AppendEscapedCSSString(NS_ConvertUTF8toUTF16(specUTF8),
tmpStr);
tmpStr.AppendLiteral(")");
} 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.Assign(NS_LITERAL_STRING("url(about:invalid)"));
}
break;
}
case CSS_ATTR :
{
tmpStr.AppendLiteral("attr(");
tmpStr.Append(mValue.mString);
tmpStr.Append(PRUnichar(')'));
break;
}
case CSS_PERCENTAGE :
{
tmpStr.AppendFloat(mValue.mFloat * 100);
tmpStr.Append(PRUnichar('%'));
break;
}
case CSS_NUMBER :
{
tmpStr.AppendFloat(mValue.mFloat);
break;
}
case CSS_RECT :
{
NS_ASSERTION(mValue.mRect, "mValue.mRect should never be null");
NS_NAMED_LITERAL_STRING(comma, ", ");
nsCOMPtr<nsIDOMCSSPrimitiveValue> sideCSSValue;
nsAutoString sideValue;
tmpStr.AssignLiteral("rect(");
// get the top
result = mValue.mRect->GetTop(getter_AddRefs(sideCSSValue));
if (NS_FAILED(result))
break;
result = sideCSSValue->GetCssText(sideValue);
if (NS_FAILED(result))
break;
tmpStr.Append(sideValue + comma);
// get the right
result = mValue.mRect->GetRight(getter_AddRefs(sideCSSValue));
if (NS_FAILED(result))
break;
result = sideCSSValue->GetCssText(sideValue);
if (NS_FAILED(result))
break;
tmpStr.Append(sideValue + comma);
// get the bottom
result = mValue.mRect->GetBottom(getter_AddRefs(sideCSSValue));
if (NS_FAILED(result))
break;
result = sideCSSValue->GetCssText(sideValue);
if (NS_FAILED(result))
break;
tmpStr.Append(sideValue + comma);
// get the left
result = mValue.mRect->GetLeft(getter_AddRefs(sideCSSValue));
if (NS_FAILED(result))
break;
result = sideCSSValue->GetCssText(sideValue);
if (NS_FAILED(result))
break;
tmpStr.Append(sideValue + NS_LITERAL_STRING(")"));
break;
}
case CSS_RGBCOLOR :
{
NS_ASSERTION(mValue.mColor, "mValue.mColor should never be null");
ErrorResult error;
NS_NAMED_LITERAL_STRING(comma, ", ");
nsAutoString colorValue;
if (mValue.mColor->HasAlpha())
tmpStr.AssignLiteral("rgba(");
else
tmpStr.AssignLiteral("rgb(");
// get the red component
mValue.mColor->Red()->GetCssText(colorValue, error);
if (error.Failed())
break;
tmpStr.Append(colorValue + comma);
// get the green component
mValue.mColor->Green()->GetCssText(colorValue, error);
if (error.Failed())
break;
tmpStr.Append(colorValue + comma);
// get the blue component
mValue.mColor->Blue()->GetCssText(colorValue, error);
if (error.Failed())
break;
tmpStr.Append(colorValue);
if (mValue.mColor->HasAlpha()) {
// get the alpha component
mValue.mColor->Alpha()->GetCssText(colorValue, error);
if (error.Failed())
break;
tmpStr.Append(comma + colorValue);
}
tmpStr.Append(NS_LITERAL_STRING(")"));
break;
}
case CSS_S :
{
tmpStr.AppendFloat(mValue.mFloat);
tmpStr.AppendLiteral("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_DEG :
case CSS_RAD :
case CSS_GRAD :
case CSS_MS :
case CSS_HZ :
case CSS_KHZ :
case CSS_DIMENSION :
NS_ERROR("We have a bogus value set. This should not happen");
return NS_ERROR_DOM_INVALID_ACCESS_ERR;
}
if (NS_SUCCEEDED(result)) {
aCssText.Assign(tmpStr);
}
return NS_OK;
}
void
nsROCSSPrimitiveValue::GetCssText(nsString& aText, ErrorResult& aRv)
{
aRv = GetCssText(aText);
}
NS_IMETHODIMP
nsROCSSPrimitiveValue::SetCssText(const nsAString& aCssText)
{
return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
}
void
nsROCSSPrimitiveValue::SetCssText(const nsAString& aText, ErrorResult& aRv)
{
aRv = SetCssText(aText);
}
NS_IMETHODIMP
nsROCSSPrimitiveValue::GetCssValueType(uint16_t* aValueType)
{
NS_ENSURE_ARG_POINTER(aValueType);
*aValueType = nsIDOMCSSValue::CSS_PRIMITIVE_VALUE;
return NS_OK;
}
uint16_t
nsROCSSPrimitiveValue::CssValueType() const
{
return nsIDOMCSSValue::CSS_PRIMITIVE_VALUE;
}
// nsIDOMCSSPrimitiveValue
NS_IMETHODIMP
nsROCSSPrimitiveValue::GetPrimitiveType(uint16_t* aPrimitiveType)
{
NS_ENSURE_ARG_POINTER(aPrimitiveType);
*aPrimitiveType = mType;
return NS_OK;
}
NS_IMETHODIMP
nsROCSSPrimitiveValue::SetFloatValue(uint16_t aUnitType, float aFloatValue)
{
return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
}
void
nsROCSSPrimitiveValue::SetFloatValue(uint16_t aType, float aVal,
ErrorResult& aRv)
{
aRv = SetFloatValue(aType, aVal);
}
float
nsROCSSPrimitiveValue::GetFloatValue(uint16_t aUnitType, ErrorResult& aRv)
{
switch(aUnitType) {
case CSS_PX :
if (mType == CSS_PX) {
return nsPresContext::AppUnitsToFloatCSSPixels(mValue.mAppUnits);
}
break;
case CSS_CM :
if (mType == CSS_PX) {
return mValue.mAppUnits * CM_PER_INCH_FLOAT /
nsPresContext::AppUnitsPerCSSInch();
}
break;
case CSS_MM :
if (mType == CSS_PX) {
return mValue.mAppUnits * MM_PER_INCH_FLOAT /
nsPresContext::AppUnitsPerCSSInch();
}
break;
case CSS_IN :
if (mType == CSS_PX) {
return mValue.mAppUnits / nsPresContext::AppUnitsPerCSSInch();
}
break;
case CSS_PT :
if (mType == CSS_PX) {
return mValue.mAppUnits * POINTS_PER_INCH_FLOAT /
nsPresContext::AppUnitsPerCSSInch();
}
break;
case CSS_PC :
if (mType == CSS_PX) {
return mValue.mAppUnits * 6.0f /
nsPresContext::AppUnitsPerCSSInch();
}
break;
case CSS_PERCENTAGE :
if (mType == CSS_PERCENTAGE) {
return mValue.mFloat * 100;
}
break;
case CSS_NUMBER :
if (mType == CSS_NUMBER) {
return mValue.mFloat;
}
break;
case CSS_UNKNOWN :
case CSS_EMS :
case CSS_EXS :
case CSS_DEG :
case CSS_RAD :
case CSS_GRAD :
case CSS_MS :
case CSS_S :
case CSS_HZ :
case CSS_KHZ :
case CSS_DIMENSION :
case CSS_STRING :
case CSS_URI :
case CSS_IDENT :
case CSS_ATTR :
case CSS_COUNTER :
case CSS_RECT :
case CSS_RGBCOLOR :
break;
}
aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
return 0;
}
NS_IMETHODIMP
nsROCSSPrimitiveValue::GetFloatValue(uint16_t aType, float *aVal)
{
ErrorResult rv;
*aVal = GetFloatValue(aType, rv);
return rv.ErrorCode();
}
NS_IMETHODIMP
nsROCSSPrimitiveValue::SetStringValue(uint16_t aStringType,
const nsAString& aStringValue)
{
return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
}
void
nsROCSSPrimitiveValue::SetStringValue(uint16_t aType, const nsAString& aString,
mozilla::ErrorResult& aRv)
{
aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
}
NS_IMETHODIMP
nsROCSSPrimitiveValue::GetStringValue(nsAString& aReturn)
{
switch (mType) {
case CSS_IDENT:
CopyUTF8toUTF16(nsCSSKeywords::GetStringValue(mValue.mKeyword), aReturn);
break;
case CSS_STRING:
case CSS_ATTR:
aReturn.Assign(mValue.mString);
break;
case CSS_URI: {
nsAutoCString spec;
if (mValue.mURI)
mValue.mURI->GetSpec(spec);
CopyUTF8toUTF16(spec, aReturn);
} break;
default:
aReturn.Truncate();
return NS_ERROR_DOM_INVALID_ACCESS_ERR;
}
return NS_OK;
}
void
nsROCSSPrimitiveValue::GetStringValue(nsString& aString, ErrorResult& aRv)
{
aRv = GetStringValue(aString);
}
NS_IMETHODIMP
nsROCSSPrimitiveValue::GetCounterValue(nsIDOMCounter** aReturn)
{
return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
}
already_AddRefed<nsIDOMCounter>
nsROCSSPrimitiveValue::GetCounterValue(ErrorResult& aRv)
{
aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
return nullptr;
}
nsDOMCSSRect*
nsROCSSPrimitiveValue::GetRectValue(ErrorResult& aRv)
{
if (mType != CSS_RECT) {
aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
return nullptr;
}
NS_ASSERTION(mValue.mRect, "mValue.mRect should never be null");
return mValue.mRect;
}
NS_IMETHODIMP
nsROCSSPrimitiveValue::GetRectValue(nsIDOMRect** aRect)
{
ErrorResult error;
NS_IF_ADDREF(*aRect = GetRectValue(error));
return error.ErrorCode();
}
nsDOMCSSRGBColor*
nsROCSSPrimitiveValue::GetRGBColorValue(ErrorResult& aRv)
{
if (mType != CSS_RGBCOLOR) {
aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
return nullptr;
}
NS_ASSERTION(mValue.mColor, "mValue.mColor should never be null");
return mValue.mColor;
}
void
nsROCSSPrimitiveValue::SetNumber(float aValue)
{
Reset();
mValue.mFloat = aValue;
mType = CSS_NUMBER;
}
void
nsROCSSPrimitiveValue::SetNumber(int32_t aValue)
{
Reset();
mValue.mFloat = float(aValue);
mType = CSS_NUMBER;
}
void
nsROCSSPrimitiveValue::SetNumber(uint32_t aValue)
{
Reset();
mValue.mFloat = float(aValue);
mType = CSS_NUMBER;
}
void
nsROCSSPrimitiveValue::SetPercent(float aValue)
{
Reset();
mValue.mFloat = aValue;
mType = CSS_PERCENTAGE;
}
void
nsROCSSPrimitiveValue::SetAppUnits(nscoord aValue)
{
Reset();
mValue.mAppUnits = aValue;
mType = CSS_PX;
}
void
nsROCSSPrimitiveValue::SetAppUnits(float aValue)
{
SetAppUnits(NSToCoordRound(aValue));
}
void
nsROCSSPrimitiveValue::SetIdent(nsCSSKeyword aKeyword)
{
NS_PRECONDITION(aKeyword != eCSSKeyword_UNKNOWN &&
0 <= aKeyword && aKeyword < eCSSKeyword_COUNT,
"bad keyword");
Reset();
mValue.mKeyword = aKeyword;
mType = CSS_IDENT;
}
// FIXME: CSS_STRING should imply a string with "" and a need for escaping.
void
nsROCSSPrimitiveValue::SetString(const nsACString& aString, uint16_t aType)
{
Reset();
mValue.mString = ToNewUnicode(aString);
if (mValue.mString) {
mType = aType;
} else {
// XXXcaa We should probably let the caller know we are out of memory
mType = CSS_UNKNOWN;
}
}
// FIXME: CSS_STRING should imply a string with "" and a need for escaping.
void
nsROCSSPrimitiveValue::SetString(const nsAString& aString, uint16_t aType)
{
Reset();
mValue.mString = ToNewUnicode(aString);
if (mValue.mString) {
mType = aType;
} 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::SetColor(nsDOMCSSRGBColor* aColor)
{
NS_PRECONDITION(aColor, "Null RGBColor being set!");
Reset();
mValue.mColor = aColor;
if (mValue.mColor) {
NS_ADDREF(mValue.mColor);
mType = CSS_RGBCOLOR;
}
else {
mType = CSS_UNKNOWN;
}
}
void
nsROCSSPrimitiveValue::SetRect(nsDOMCSSRect* aRect)
{
NS_PRECONDITION(aRect, "Null rect being set!");
Reset();
mValue.mRect = aRect;
if (mValue.mRect) {
NS_ADDREF(mValue.mRect);
mType = CSS_RECT;
}
else {
mType = CSS_UNKNOWN;
}
}
void
nsROCSSPrimitiveValue::SetTime(float aValue)
{
Reset();
mValue.mFloat = aValue;
mType = CSS_S;
}
void
nsROCSSPrimitiveValue::Reset()
{
switch (mType) {
case CSS_IDENT:
break;
case CSS_STRING:
case CSS_ATTR:
case CSS_COUNTER: // FIXME: Counter should use an object
NS_ASSERTION(mValue.mString, "Null string should never happen");
nsMemory::Free(mValue.mString);
mValue.mString = nullptr;
break;
case CSS_URI:
NS_IF_RELEASE(mValue.mURI);
break;
case CSS_RECT:
NS_ASSERTION(mValue.mRect, "Null Rect should never happen");
NS_RELEASE(mValue.mRect);
break;
case CSS_RGBCOLOR:
NS_ASSERTION(mValue.mColor, "Null RGBColor should never happen");
NS_RELEASE(mValue.mColor);
break;
}
mType = CSS_UNKNOWN;
}