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gecko/layout/style/nsStyleAnimation.cpp
L. David Baron 25d74a36a4 Remove null-checks of nsCSSParser, since construction is infallible. (Bug 542058, patch 1) r=bzbarsky 
Note that many callers already skipped the null-checks.
2011-04-21 20:17:31 -07:00

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/* -*- 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 nsStyleAnimation.
*
* The Initial Developer of the Original Code is
* The Mozilla Corporation.
* Portions created by the Initial Developer are Copyright (C) 2009
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Daniel Holbert <dholbert@mozilla.com>, Mozilla Corporation
* L. David Baron <dbaron@dbaron.org>, Mozilla Corporation
*
* Alternatively, the contents of this file may be used under the terms of
* either 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 ***** */
/* Utilities for animation of computed style values */
#include "nsStyleAnimation.h"
#include "nsCOMArray.h"
#include "nsIStyleRule.h"
#include "mozilla/css/StyleRule.h"
#include "nsString.h"
#include "nsStyleContext.h"
#include "nsStyleSet.h"
#include "nsComputedDOMStyle.h"
#include "nsCSSParser.h"
#include "mozilla/css/Declaration.h"
#include "mozilla/dom/Element.h"
#include "prlog.h"
#include <math.h>
namespace css = mozilla::css;
namespace dom = mozilla::dom;
// HELPER METHODS
// --------------
/*
* Given two units, this method returns a common unit that they can both be
* converted into, if possible. This is intended to facilitate
* interpolation, distance-computation, and addition between "similar" units.
*
* The ordering of the arguments should not affect the output of this method.
*
* If there's no sensible common unit, this method returns eUnit_Null.
*
* @param aFirstUnit One unit to resolve.
* @param aFirstUnit The other unit to resolve.
* @return A "common" unit that both source units can be converted into, or
* eUnit_Null if that's not possible.
*/
static
nsStyleAnimation::Unit
GetCommonUnit(nsCSSProperty aProperty,
nsStyleAnimation::Unit aFirstUnit,
nsStyleAnimation::Unit aSecondUnit)
{
if (aFirstUnit != aSecondUnit) {
if (nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_STORES_CALC) &&
(aFirstUnit == nsStyleAnimation::eUnit_Coord ||
aFirstUnit == nsStyleAnimation::eUnit_Percent ||
aFirstUnit == nsStyleAnimation::eUnit_Calc) &&
(aSecondUnit == nsStyleAnimation::eUnit_Coord ||
aSecondUnit == nsStyleAnimation::eUnit_Percent ||
aSecondUnit == nsStyleAnimation::eUnit_Calc)) {
// We can use calc() as the common unit.
return nsStyleAnimation::eUnit_Calc;
}
return nsStyleAnimation::eUnit_Null;
}
return aFirstUnit;
}
static
nsCSSUnit
GetCommonUnit(nsCSSProperty aProperty,
nsCSSUnit aFirstUnit,
nsCSSUnit aSecondUnit)
{
if (aFirstUnit != aSecondUnit) {
if (nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_STORES_CALC) &&
(aFirstUnit == eCSSUnit_Pixel ||
aFirstUnit == eCSSUnit_Percent ||
aFirstUnit == eCSSUnit_Calc) &&
(aSecondUnit == eCSSUnit_Pixel ||
aSecondUnit == eCSSUnit_Percent ||
aSecondUnit == eCSSUnit_Calc)) {
// We can use calc() as the common unit.
return eCSSUnit_Calc;
}
return eCSSUnit_Null;
}
return aFirstUnit;
}
// Greatest Common Divisor
static PRUint32
gcd(PRUint32 a, PRUint32 b)
{
// Euclid's algorithm; O(N) in the worst case. (There are better
// ways, but we don't need them for stroke-dasharray animation.)
NS_ABORT_IF_FALSE(a > 0 && b > 0, "positive numbers expected");
while (a != b) {
if (a > b) {
a = a - b;
} else {
b = b - a;
}
}
return a;
}
// Least Common Multiple
static PRUint32
lcm(PRUint32 a, PRUint32 b)
{
// Divide first to reduce overflow risk.
return (a / gcd(a, b)) * b;
}
inline void
nscoordToCSSValue(nscoord aCoord, nsCSSValue& aCSSValue)
{
aCSSValue.SetFloatValue(nsPresContext::AppUnitsToFloatCSSPixels(aCoord),
eCSSUnit_Pixel);
}
// Like nsStyleCoord::Calc, but with length in float pixels instead of nscoord.
struct CalcValue {
float mLength, mPercent;
PRBool mHasPercent;
};
// Requires a canonical calc() value that we generated.
static CalcValue
ExtractCalcValueInternal(const nsCSSValue& aValue)
{
NS_ABORT_IF_FALSE(aValue.GetUnit() == eCSSUnit_Calc, "unexpected unit");
nsCSSValue::Array *arr = aValue.GetArrayValue();
NS_ABORT_IF_FALSE(arr->Count() == 1, "unexpected length");
const nsCSSValue &topval = arr->Item(0);
CalcValue result;
if (topval.GetUnit() == eCSSUnit_Pixel) {
result.mLength = topval.GetFloatValue();
result.mPercent = 0.0f;
result.mHasPercent = PR_FALSE;
} else {
NS_ABORT_IF_FALSE(topval.GetUnit() == eCSSUnit_Calc_Plus,
"unexpected unit");
nsCSSValue::Array *arr2 = topval.GetArrayValue();
const nsCSSValue &len = arr2->Item(0);
const nsCSSValue &pct = arr2->Item(1);
NS_ABORT_IF_FALSE(len.GetUnit() == eCSSUnit_Pixel, "unexpected unit");
NS_ABORT_IF_FALSE(pct.GetUnit() == eCSSUnit_Percent, "unexpected unit");
result.mLength = len.GetFloatValue();
result.mPercent = pct.GetPercentValue();
result.mHasPercent = PR_TRUE;
}
return result;
}
// Requires a canonical calc() value that we generated.
static CalcValue
ExtractCalcValue(const nsStyleAnimation::Value& aValue)
{
CalcValue result;
if (aValue.GetUnit() == nsStyleAnimation::eUnit_Coord) {
result.mLength =
nsPresContext::AppUnitsToFloatCSSPixels(aValue.GetCoordValue());
result.mPercent = 0.0f;
result.mHasPercent = PR_FALSE;
return result;
}
if (aValue.GetUnit() == nsStyleAnimation::eUnit_Percent) {
result.mLength = 0.0f;
result.mPercent = aValue.GetPercentValue();
result.mHasPercent = PR_TRUE;
return result;
}
NS_ABORT_IF_FALSE(aValue.GetUnit() == nsStyleAnimation::eUnit_Calc,
"unexpected unit");
nsCSSValue *val = aValue.GetCSSValueValue();
return ExtractCalcValueInternal(*val);
}
static CalcValue
ExtractCalcValue(const nsCSSValue& aValue)
{
CalcValue result;
if (aValue.GetUnit() == eCSSUnit_Pixel) {
result.mLength = aValue.GetFloatValue();
result.mPercent = 0.0f;
result.mHasPercent = PR_FALSE;
return result;
}
if (aValue.GetUnit() == eCSSUnit_Percent) {
result.mLength = 0.0f;
result.mPercent = aValue.GetPercentValue();
result.mHasPercent = PR_TRUE;
return result;
}
return ExtractCalcValueInternal(aValue);
}
static void
SetCalcValue(const nsStyleCoord::Calc* aCalc, nsCSSValue& aValue)
{
nsRefPtr<nsCSSValue::Array> arr = nsCSSValue::Array::Create(1);
if (!aCalc->mHasPercent) {
nscoordToCSSValue(aCalc->mLength, arr->Item(0));
} else {
nsCSSValue::Array *arr2 = nsCSSValue::Array::Create(2);
arr->Item(0).SetArrayValue(arr2, eCSSUnit_Calc_Plus);
nscoordToCSSValue(aCalc->mLength, arr2->Item(0));
arr2->Item(1).SetPercentValue(aCalc->mPercent);
}
aValue.SetArrayValue(arr, eCSSUnit_Calc);
}
static already_AddRefed<nsStringBuffer>
GetURIAsUtf16StringBuffer(nsIURI* aUri)
{
nsCAutoString utf8String;
nsresult rv = aUri->GetSpec(utf8String);
NS_ENSURE_SUCCESS(rv, nsnull);
return nsCSSValue::BufferFromString(NS_ConvertUTF8toUTF16(utf8String));
}
// CLASS METHODS
// -------------
PRBool
nsStyleAnimation::ComputeDistance(nsCSSProperty aProperty,
const Value& aStartValue,
const Value& aEndValue,
double& aDistance)
{
Unit commonUnit =
GetCommonUnit(aProperty, aStartValue.GetUnit(), aEndValue.GetUnit());
switch (commonUnit) {
case eUnit_Null:
case eUnit_Auto:
case eUnit_None:
case eUnit_Normal:
case eUnit_UnparsedString:
return PR_FALSE;
case eUnit_Enumerated:
switch (aProperty) {
case eCSSProperty_font_stretch: {
// just like eUnit_Integer.
PRInt32 startInt = aStartValue.GetIntValue();
PRInt32 endInt = aEndValue.GetIntValue();
aDistance = PR_ABS(endInt - startInt);
return PR_TRUE;
}
default:
return PR_FALSE;
}
case eUnit_Visibility: {
PRInt32 startVal =
aStartValue.GetIntValue() == NS_STYLE_VISIBILITY_VISIBLE;
PRInt32 endVal =
aEndValue.GetIntValue() == NS_STYLE_VISIBILITY_VISIBLE;
aDistance = PR_ABS(startVal - endVal);
return PR_TRUE;
}
case eUnit_Integer: {
PRInt32 startInt = aStartValue.GetIntValue();
PRInt32 endInt = aEndValue.GetIntValue();
aDistance = PR_ABS(endInt - startInt);
return PR_TRUE;
}
case eUnit_Coord: {
nscoord startCoord = aStartValue.GetCoordValue();
nscoord endCoord = aEndValue.GetCoordValue();
aDistance = fabs(double(endCoord - startCoord));
return PR_TRUE;
}
case eUnit_Percent: {
float startPct = aStartValue.GetPercentValue();
float endPct = aEndValue.GetPercentValue();
aDistance = fabs(double(endPct - startPct));
return PR_TRUE;
}
case eUnit_Float: {
float startFloat = aStartValue.GetFloatValue();
float endFloat = aEndValue.GetFloatValue();
aDistance = fabs(double(endFloat - startFloat));
return PR_TRUE;
}
case eUnit_Color: {
// http://www.w3.org/TR/smil-animation/#animateColorElement says
// that we should use Euclidean RGB cube distance. However, we
// have to extend that to RGBA. For now, we'll just use the
// Euclidean distance in the (part of the) 4-cube of premultiplied
// colors.
// FIXME (spec): The CSS transitions spec doesn't say whether
// colors are premultiplied, but things work better when they are,
// so use premultiplication. Spec issue is still open per
// http://lists.w3.org/Archives/Public/www-style/2009Jul/0050.html
nscolor startColor = aStartValue.GetColorValue();
nscolor endColor = aEndValue.GetColorValue();
// Get a color component on a 0-1 scale, which is much easier to
// deal with when working with alpha.
#define GET_COMPONENT(component_, color_) \
(NS_GET_##component_(color_) * (1.0 / 255.0))
double startA = GET_COMPONENT(A, startColor);
double startR = GET_COMPONENT(R, startColor) * startA;
double startG = GET_COMPONENT(G, startColor) * startA;
double startB = GET_COMPONENT(B, startColor) * startA;
double endA = GET_COMPONENT(A, endColor);
double endR = GET_COMPONENT(R, endColor) * endA;
double endG = GET_COMPONENT(G, endColor) * endA;
double endB = GET_COMPONENT(B, endColor) * endA;
#undef GET_COMPONENT
double diffA = startA - endA;
double diffR = startR - endR;
double diffG = startG - endG;
double diffB = startB - endB;
aDistance = sqrt(diffA * diffA + diffR * diffR +
diffG * diffG + diffB * diffB);
return PR_TRUE;
}
case eUnit_Calc: {
CalcValue v1 = ExtractCalcValue(aStartValue);
CalcValue v2 = ExtractCalcValue(aEndValue);
float difflen = v2.mLength - v1.mLength;
float diffpct = v2.mPercent - v1.mPercent;
aDistance = sqrt(difflen * difflen + diffpct * diffpct);
return PR_TRUE;
}
case eUnit_CSSValuePair: {
const nsCSSValuePair *pair1 = aStartValue.GetCSSValuePairValue();
const nsCSSValuePair *pair2 = aEndValue.GetCSSValuePairValue();
nsCSSUnit unit[2];
unit[0] = GetCommonUnit(aProperty, pair1->mXValue.GetUnit(),
pair2->mXValue.GetUnit());
unit[1] = GetCommonUnit(aProperty, pair1->mYValue.GetUnit(),
pair2->mYValue.GetUnit());
if (unit[0] == eCSSUnit_Null || unit[1] == eCSSUnit_Null ||
unit[0] == eCSSUnit_URL) {
return PR_FALSE;
}
double squareDistance = 0.0;
static nsCSSValue nsCSSValuePair::* const pairValues[2] = {
&nsCSSValuePair::mXValue, &nsCSSValuePair::mYValue
};
for (PRUint32 i = 0; i < 2; ++i) {
nsCSSValue nsCSSValuePair::*member = pairValues[i];
double diffsquared;
switch (unit[i]) {
case eCSSUnit_Pixel: {
float diff = (pair1->*member).GetFloatValue() -
(pair2->*member).GetFloatValue();
diffsquared = diff * diff;
break;
}
case eCSSUnit_Percent: {
float diff = (pair1->*member).GetPercentValue() -
(pair2->*member).GetPercentValue();
diffsquared = diff * diff;
break;
}
case eCSSUnit_Calc: {
CalcValue v1 = ExtractCalcValue(pair1->*member);
CalcValue v2 = ExtractCalcValue(pair2->*member);
float difflen = v2.mLength - v1.mLength;
float diffpct = v2.mPercent - v1.mPercent;
diffsquared = difflen * difflen + diffpct * diffpct;
break;
}
default:
NS_ABORT_IF_FALSE(PR_FALSE, "unexpected unit");
return PR_FALSE;
}
squareDistance += diffsquared;
}
aDistance = sqrt(squareDistance);
return PR_TRUE;
}
case eUnit_CSSRect: {
const nsCSSRect *rect1 = aStartValue.GetCSSRectValue();
const nsCSSRect *rect2 = aEndValue.GetCSSRectValue();
if (rect1->mTop.GetUnit() != rect2->mTop.GetUnit() ||
rect1->mRight.GetUnit() != rect2->mRight.GetUnit() ||
rect1->mBottom.GetUnit() != rect2->mBottom.GetUnit() ||
rect1->mLeft.GetUnit() != rect2->mLeft.GetUnit()) {
// At least until we have calc()
return PR_FALSE;
}
double squareDistance = 0.0;
for (PRUint32 i = 0; i < NS_ARRAY_LENGTH(nsCSSRect::sides); ++i) {
nsCSSValue nsCSSRect::*member = nsCSSRect::sides[i];
NS_ABORT_IF_FALSE((rect1->*member).GetUnit() ==
(rect2->*member).GetUnit(),
"should have returned above");
double diff;
switch ((rect1->*member).GetUnit()) {
case eCSSUnit_Pixel:
diff = (rect1->*member).GetFloatValue() -
(rect2->*member).GetFloatValue();
break;
case eCSSUnit_Auto:
diff = 0;
break;
default:
NS_ABORT_IF_FALSE(PR_FALSE, "unexpected unit");
return PR_FALSE;
}
squareDistance += diff * diff;
}
aDistance = sqrt(squareDistance);
return PR_TRUE;
}
case eUnit_Dasharray: {
// NOTE: This produces results on substantially different scales
// for length values and percentage values, which might even be
// mixed in the same property value. This means the result isn't
// particularly useful for paced animation.
// Call AddWeighted to make us lists of the same length.
Value normValue1, normValue2;
if (!AddWeighted(aProperty, 1.0, aStartValue, 0.0, aEndValue,
normValue1) ||
!AddWeighted(aProperty, 0.0, aStartValue, 1.0, aEndValue,
normValue2)) {
return PR_FALSE;
}
double squareDistance = 0.0;
const nsCSSValueList *list1 = normValue1.GetCSSValueListValue();
const nsCSSValueList *list2 = normValue2.GetCSSValueListValue();
NS_ABORT_IF_FALSE(!list1 == !list2, "lists should be same length");
while (list1) {
const nsCSSValue &val1 = list1->mValue;
const nsCSSValue &val2 = list2->mValue;
NS_ABORT_IF_FALSE(val1.GetUnit() == val2.GetUnit(),
"unit match should be assured by AddWeighted");
double diff;
switch (val1.GetUnit()) {
case eCSSUnit_Percent:
diff = val1.GetPercentValue() - val2.GetPercentValue();
break;
case eCSSUnit_Number:
diff = val1.GetFloatValue() - val2.GetFloatValue();
break;
default:
NS_ABORT_IF_FALSE(PR_FALSE, "unexpected unit");
return PR_FALSE;
}
squareDistance += diff * diff;
list1 = list1->mNext;
list2 = list2->mNext;
NS_ABORT_IF_FALSE(!list1 == !list2, "lists should be same length");
}
aDistance = sqrt(squareDistance);
return PR_TRUE;
}
case eUnit_Shadow: {
// Call AddWeighted to make us lists of the same length.
Value normValue1, normValue2;
if (!AddWeighted(aProperty, 1.0, aStartValue, 0.0, aEndValue,
normValue1) ||
!AddWeighted(aProperty, 0.0, aStartValue, 1.0, aEndValue,
normValue2)) {
return PR_FALSE;
}
const nsCSSValueList *shadow1 = normValue1.GetCSSValueListValue();
const nsCSSValueList *shadow2 = normValue2.GetCSSValueListValue();
double squareDistance = 0.0;
NS_ABORT_IF_FALSE(!shadow1 == !shadow2, "lists should be same length");
while (shadow1) {
nsCSSValue::Array *array1 = shadow1->mValue.GetArrayValue();
nsCSSValue::Array *array2 = shadow2->mValue.GetArrayValue();
for (size_t i = 0; i < 4; ++i) {
NS_ABORT_IF_FALSE(array1->Item(i).GetUnit() == eCSSUnit_Pixel,
"unexpected unit");
NS_ABORT_IF_FALSE(array2->Item(i).GetUnit() == eCSSUnit_Pixel,
"unexpected unit");
double diff = array1->Item(i).GetFloatValue() -
array2->Item(i).GetFloatValue();
squareDistance += diff * diff;
}
const nsCSSValue &color1 = array1->Item(4);
const nsCSSValue &color2 = array2->Item(4);
#ifdef DEBUG
{
const nsCSSValue &inset1 = array1->Item(5);
const nsCSSValue &inset2 = array2->Item(5);
// There are only two possible states of the inset value:
// (1) GetUnit() == eCSSUnit_Null
// (2) GetUnit() == eCSSUnit_Enumerated &&
// GetIntValue() == NS_STYLE_BOX_SHADOW_INSET
NS_ABORT_IF_FALSE(color1.GetUnit() == color2.GetUnit() &&
inset1 == inset2,
"AddWeighted should have failed");
}
#endif
if (color1.GetUnit() != eCSSUnit_Null) {
nsStyleAnimation::Value color1Value
(color1.GetColorValue(), nsStyleAnimation::Value::ColorConstructor);
nsStyleAnimation::Value color2Value
(color2.GetColorValue(), nsStyleAnimation::Value::ColorConstructor);
double colorDistance;
#ifdef DEBUG
PRBool ok =
#endif
nsStyleAnimation::ComputeDistance(eCSSProperty_color,
color1Value, color2Value,
colorDistance);
NS_ABORT_IF_FALSE(ok, "should not fail");
squareDistance += colorDistance * colorDistance;
}
shadow1 = shadow1->mNext;
shadow2 = shadow2->mNext;
NS_ABORT_IF_FALSE(!shadow1 == !shadow2, "lists should be same length");
}
aDistance = sqrt(squareDistance);
return PR_TRUE;
}
case eUnit_Transform: {
// Call AddWeighted to normalize to the format we use for
// interpolation. (This is far from ideal, but it provides good
// behavior for distance along a running transition.)
Value normValue1, normValue2;
if (!AddWeighted(aProperty, 1.0, aStartValue, 0.0, aEndValue,
normValue1) ||
!AddWeighted(aProperty, 0.0, aStartValue, 1.0, aEndValue,
normValue2)) {
return PR_FALSE;
}
const nsCSSValueList *list1 = normValue1.GetCSSValueListValue();
const nsCSSValueList *list2 = normValue2.GetCSSValueListValue();
NS_ABORT_IF_FALSE((list1->mValue.GetUnit() == eCSSUnit_None) ==
(list2->mValue.GetUnit() == eCSSUnit_None),
"none-ness should match after AddWeighted");
if (list1->mValue.GetUnit() == eCSSUnit_None) {
aDistance = 0;
return PR_TRUE;
}
double squareDistance = 0.0;
for (; list1 && list2; list1 = list1->mNext, list2 = list2->mNext) {
NS_ABORT_IF_FALSE(list1->mValue.GetUnit() == eCSSUnit_Function &&
list2->mValue.GetUnit() == eCSSUnit_Function,
"unexpected unit");
const nsCSSValue::Array *a1 = list1->mValue.GetArrayValue(),
*a2 = list2->mValue.GetArrayValue();
NS_ABORT_IF_FALSE(a1->Item(0).GetUnit() == eCSSUnit_Ident &&
a2->Item(0).GetUnit() == eCSSUnit_Ident,
"unexpected unit");
NS_ABORT_IF_FALSE(a1->Item(0) == a2->Item(0),
"unexpected function mismatch");
NS_ABORT_IF_FALSE(a1->Count() == a2->Count(),
"unexpected count mismatch");
for (size_t i = 1, iEnd = NS_MIN(a1->Count(), a2->Count());
i < iEnd; ++i) {
const nsCSSValue &v1 = a1->Item(i), &v2 = a2->Item(i);
NS_ABORT_IF_FALSE(v1.GetUnit() == eCSSUnit_Pixel ||
v1.GetUnit() == eCSSUnit_Percent ||
v1.GetUnit() == eCSSUnit_Calc ||
v1.GetUnit() == eCSSUnit_Radian ||
v1.GetUnit() == eCSSUnit_Number,
"unexpected unit");
NS_ABORT_IF_FALSE(v2.GetUnit() == eCSSUnit_Pixel ||
v2.GetUnit() == eCSSUnit_Percent ||
v2.GetUnit() == eCSSUnit_Calc ||
v2.GetUnit() == eCSSUnit_Radian ||
v2.GetUnit() == eCSSUnit_Number,
"unexpected unit");
if (v1.GetUnit() == eCSSUnit_Pixel ||
v1.GetUnit() == eCSSUnit_Percent ||
v1.GetUnit() == eCSSUnit_Calc) {
NS_ABORT_IF_FALSE(v2.GetUnit() == eCSSUnit_Pixel ||
v2.GetUnit() == eCSSUnit_Percent ||
v2.GetUnit() == eCSSUnit_Calc,
"unit mismatch");
CalcValue c1 = ExtractCalcValue(v1),
c2 = ExtractCalcValue(v2);
double diff = c1.mLength - c2.mLength;
squareDistance += diff * diff;
diff = c1.mPercent - c2.mPercent;
squareDistance += diff * diff;
} else {
NS_ABORT_IF_FALSE(v1.GetUnit() == v2.GetUnit(), "unit mismatch");
double diff = v2.GetFloatValue() - v1.GetFloatValue();
squareDistance += diff * diff;
}
}
}
NS_ABORT_IF_FALSE(!list1 && !list2,
"list lengths should match after AddWeighted");
aDistance = sqrt(squareDistance);
return PR_TRUE;
}
case eUnit_CSSValuePairList: {
const nsCSSValuePairList *list1 = aStartValue.GetCSSValuePairListValue();
const nsCSSValuePairList *list2 = aEndValue.GetCSSValuePairListValue();
double squareDistance = 0.0;
do {
static nsCSSValue nsCSSValuePairList::* const pairListValues[] = {
&nsCSSValuePairList::mXValue,
&nsCSSValuePairList::mYValue,
};
for (PRUint32 i = 0; i < NS_ARRAY_LENGTH(pairListValues); ++i) {
const nsCSSValue &v1 = list1->*(pairListValues[i]);
const nsCSSValue &v2 = list2->*(pairListValues[i]);
nsCSSUnit unit =
GetCommonUnit(aProperty, v1.GetUnit(), v2.GetUnit());
if (unit == eCSSUnit_Null) {
return PR_FALSE;
}
double diffsquared = 0.0;
switch (unit) {
case eCSSUnit_Pixel: {
float diff = v1.GetFloatValue() - v2.GetFloatValue();
diffsquared = diff * diff;
break;
}
case eCSSUnit_Percent: {
float diff = v1.GetPercentValue() - v2.GetPercentValue();
diffsquared = diff * diff;
break;
}
case eCSSUnit_Calc: {
CalcValue val1 = ExtractCalcValue(v1);
CalcValue val2 = ExtractCalcValue(v2);
float difflen = val2.mLength - val1.mLength;
float diffpct = val2.mPercent - val1.mPercent;
diffsquared = difflen * difflen + diffpct * diffpct;
break;
}
default:
if (v1 != v2) {
return PR_FALSE;
}
break;
}
squareDistance += diffsquared;
}
list1 = list1->mNext;
list2 = list2->mNext;
} while (list1 && list2);
if (list1 || list2) {
// We can't interpolate lists of different lengths.
return PR_FALSE;
}
aDistance = sqrt(squareDistance);
return PR_TRUE;
}
}
NS_ABORT_IF_FALSE(false, "Can't compute distance using the given common unit");
return PR_FALSE;
}
#define MAX_PACKED_COLOR_COMPONENT 255
inline PRUint8 ClampColor(double aColor)
{
if (aColor >= MAX_PACKED_COLOR_COMPONENT)
return MAX_PACKED_COLOR_COMPONENT;
if (aColor <= 0.0)
return 0;
return NSToIntRound(aColor);
}
static inline void
AddCSSValuePixel(double aCoeff1, const nsCSSValue &aValue1,
double aCoeff2, const nsCSSValue &aValue2,
nsCSSValue &aResult)
{
NS_ABORT_IF_FALSE(aValue1.GetUnit() == eCSSUnit_Pixel, "unexpected unit");
NS_ABORT_IF_FALSE(aValue2.GetUnit() == eCSSUnit_Pixel, "unexpected unit");
aResult.SetFloatValue(aCoeff1 * aValue1.GetFloatValue() +
aCoeff2 * aValue2.GetFloatValue(),
eCSSUnit_Pixel);
}
static inline void
AddCSSValueNumber(double aCoeff1, const nsCSSValue &aValue1,
double aCoeff2, const nsCSSValue &aValue2,
nsCSSValue &aResult)
{
NS_ABORT_IF_FALSE(aValue1.GetUnit() == eCSSUnit_Number, "unexpected unit");
NS_ABORT_IF_FALSE(aValue2.GetUnit() == eCSSUnit_Number, "unexpected unit");
aResult.SetFloatValue(aCoeff1 * aValue1.GetFloatValue() +
aCoeff2 * aValue2.GetFloatValue(),
eCSSUnit_Number);
}
static inline void
AddCSSValuePercent(double aCoeff1, const nsCSSValue &aValue1,
double aCoeff2, const nsCSSValue &aValue2,
nsCSSValue &aResult)
{
NS_ABORT_IF_FALSE(aValue1.GetUnit() == eCSSUnit_Percent, "unexpected unit");
NS_ABORT_IF_FALSE(aValue2.GetUnit() == eCSSUnit_Percent, "unexpected unit");
aResult.SetPercentValue(aCoeff1 * aValue1.GetPercentValue() +
aCoeff2 * aValue2.GetPercentValue());
}
// Add two canonical-form calc values (eUnit_Calc) to make another
// canonical-form calc value.
static void
AddCSSValueCanonicalCalc(double aCoeff1, const nsCSSValue &aValue1,
double aCoeff2, const nsCSSValue &aValue2,
nsCSSValue &aResult)
{
CalcValue v1 = ExtractCalcValue(aValue1);
CalcValue v2 = ExtractCalcValue(aValue2);
NS_ABORT_IF_FALSE(v1.mHasPercent || v2.mHasPercent,
"only used on properties that always have percent in calc");
nsRefPtr<nsCSSValue::Array> a = nsCSSValue::Array::Create(2),
acalc = nsCSSValue::Array::Create(1);
a->Item(0).SetFloatValue(aCoeff1 * v1.mLength + aCoeff2 * v2.mLength,
eCSSUnit_Pixel);
a->Item(1).SetPercentValue(aCoeff1 * v1.mPercent + aCoeff2 * v2.mPercent);
acalc->Item(0).SetArrayValue(a, eCSSUnit_Calc_Plus);
aResult.SetArrayValue(acalc, eCSSUnit_Calc);
}
static void
AddCSSValueAngle(const nsCSSValue &aValue1, double aCoeff1,
const nsCSSValue &aValue2, double aCoeff2,
nsCSSValue &aResult)
{
aResult.SetFloatValue(aCoeff1 * aValue1.GetAngleValueInRadians() +
aCoeff2 * aValue2.GetAngleValueInRadians(),
eCSSUnit_Radian);
}
static PRBool
AddShadowItems(double aCoeff1, const nsCSSValue &aValue1,
double aCoeff2, const nsCSSValue &aValue2,
nsCSSValueList **&aResultTail)
{
// X, Y, Radius, Spread, Color, Inset
NS_ABORT_IF_FALSE(aValue1.GetUnit() == eCSSUnit_Array,
"wrong unit");
NS_ABORT_IF_FALSE(aValue2.GetUnit() == eCSSUnit_Array,
"wrong unit");
nsCSSValue::Array *array1 = aValue1.GetArrayValue();
nsCSSValue::Array *array2 = aValue2.GetArrayValue();
nsRefPtr<nsCSSValue::Array> resultArray = nsCSSValue::Array::Create(6);
for (size_t i = 0; i < 4; ++i) {
AddCSSValuePixel(aCoeff1, array1->Item(i), aCoeff2, array2->Item(i),
resultArray->Item(i));
}
const nsCSSValue& color1 = array1->Item(4);
const nsCSSValue& color2 = array2->Item(4);
const nsCSSValue& inset1 = array1->Item(5);
const nsCSSValue& inset2 = array2->Item(5);
if (color1.GetUnit() != color2.GetUnit() ||
inset1.GetUnit() != inset2.GetUnit()) {
// We don't know how to animate between color and no-color, or
// between inset and not-inset.
return PR_FALSE;
}
if (color1.GetUnit() != eCSSUnit_Null) {
nsStyleAnimation::Value color1Value
(color1.GetColorValue(), nsStyleAnimation::Value::ColorConstructor);
nsStyleAnimation::Value color2Value
(color2.GetColorValue(), nsStyleAnimation::Value::ColorConstructor);
nsStyleAnimation::Value resultColorValue;
#ifdef DEBUG
PRBool ok =
#endif
nsStyleAnimation::AddWeighted(eCSSProperty_color, aCoeff1, color1Value,
aCoeff2, color2Value, resultColorValue);
NS_ABORT_IF_FALSE(ok, "should not fail");
resultArray->Item(4).SetColorValue(resultColorValue.GetColorValue());
}
NS_ABORT_IF_FALSE(inset1 == inset2, "should match");
resultArray->Item(5) = inset1;
nsCSSValueList *resultItem = new nsCSSValueList;
if (!resultItem) {
return PR_FALSE;
}
resultItem->mValue.SetArrayValue(resultArray, eCSSUnit_Array);
*aResultTail = resultItem;
aResultTail = &resultItem->mNext;
return PR_TRUE;
}
static void
AddTransformTranslate(const nsCSSValue &aValue1, double aCoeff1,
const nsCSSValue &aValue2, double aCoeff2,
nsCSSValue &aResult)
{
NS_ABORT_IF_FALSE(aValue1.GetUnit() == eCSSUnit_Percent ||
aValue1.GetUnit() == eCSSUnit_Pixel ||
aValue1.IsCalcUnit(),
"unexpected unit");
NS_ABORT_IF_FALSE(aValue2.GetUnit() == eCSSUnit_Percent ||
aValue2.GetUnit() == eCSSUnit_Pixel ||
aValue2.IsCalcUnit(),
"unexpected unit");
if (aValue1.GetUnit() != aValue2.GetUnit() || aValue1.IsCalcUnit()) {
// different units; create a calc() expression
AddCSSValueCanonicalCalc(aCoeff1, aValue1, aCoeff2, aValue2, aResult);
} else if (aValue1.GetUnit() == eCSSUnit_Percent) {
// both percent
AddCSSValuePercent(aCoeff1, aValue1, aCoeff2, aValue2, aResult);
} else {
// both pixels
AddCSSValuePixel(aCoeff1, aValue1, aCoeff2, aValue2, aResult);
}
}
static void
AddTransformScale(const nsCSSValue &aValue1, double aCoeff1,
const nsCSSValue &aValue2, double aCoeff2,
nsCSSValue &aResult)
{
// Handle scale, and the two matrix components where identity is 1, by
// subtracting 1, multiplying by the coefficients, and then adding 1
// back. This gets the right AddWeighted behavior and gets us the
// interpolation-against-identity behavior for free.
NS_ABORT_IF_FALSE(aValue1.GetUnit() == eCSSUnit_Number, "unexpected unit");
NS_ABORT_IF_FALSE(aValue2.GetUnit() == eCSSUnit_Number, "unexpected unit");
float v1 = aValue1.GetFloatValue() - 1.0f,
v2 = aValue2.GetFloatValue() - 1.0f;
float result = v1 * aCoeff1 + v2 * aCoeff2;
aResult.SetFloatValue(result + 1.0f, eCSSUnit_Number);
}
static already_AddRefed<nsCSSValue::Array>
AppendTransformFunction(nsCSSKeyword aTransformFunction,
nsCSSValueList**& aListTail)
{
PRUint32 nargs;
if (aTransformFunction == eCSSKeyword_matrix) {
nargs = 6;
} else if (aTransformFunction == eCSSKeyword_translate ||
aTransformFunction == eCSSKeyword_skew ||
aTransformFunction == eCSSKeyword_scale) {
nargs = 2;
} else {
NS_ABORT_IF_FALSE(aTransformFunction == eCSSKeyword_translatex ||
aTransformFunction == eCSSKeyword_translatey ||
aTransformFunction == eCSSKeyword_scalex ||
aTransformFunction == eCSSKeyword_scaley ||
aTransformFunction == eCSSKeyword_skewx ||
aTransformFunction == eCSSKeyword_skewy ||
aTransformFunction == eCSSKeyword_rotate,
"must be a transform function");
nargs = 1;
}
nsRefPtr<nsCSSValue::Array> arr = nsCSSValue::Array::Create(nargs + 1);
arr->Item(0).SetStringValue(
NS_ConvertUTF8toUTF16(nsCSSKeywords::GetStringValue(aTransformFunction)),
eCSSUnit_Ident);
nsCSSValueList *item = new nsCSSValueList;
item->mValue.SetArrayValue(arr, eCSSUnit_Function);
*aListTail = item;
aListTail = &item->mNext;
return arr.forget();
}
/*
* The relevant section of the transitions specification:
* http://dev.w3.org/csswg/css3-transitions/#animation-of-property-types-
* defers all of the details to the 2-D and 3-D transforms specifications.
* For the 2-D transforms specification (all that's relevant for us, right
* now), the relevant section is:
* http://dev.w3.org/csswg/css3-2d-transforms/#animation
* This, in turn, refers to the unmatrix program in Graphics Gems,
* available from http://tog.acm.org/resources/GraphicsGems/ , and in
* particular as the file GraphicsGems/gemsii/unmatrix.c
* in http://tog.acm.org/resources/GraphicsGems/AllGems.tar.gz
*
* The unmatrix reference is for general 3-D transform matrices (any of the
* 16 components can have any value).
*
* For CSS 2-D transforms, we have a 2-D matrix with the bottom row constant:
*
* [ A C E ]
* [ B D F ]
* [ 0 0 1 ]
*
* For that case, I believe the algorithm in unmatrix reduces to:
*
* (1) If A * D - B * C == 0, the matrix is singular. Fail.
*
* (2) Set translation components (Tx and Ty) to the translation parts of
* the matrix (E and F) and then ignore them for the rest of the time.
* (For us, E and F each actually consist of three constants: a
* length, a multiplier for the width, and a multiplier for the
* height. This actually requires its own decomposition, but I'll
* keep that separate.)
*
* (3) Let the X scale (Sx) be sqrt(A^2 + B^2). Then divide both A and B
* by it.
*
* (4) Let the XY shear (K) be A * C + B * D. From C, subtract A times
* the XY shear. From D, subtract B times the XY shear.
*
* (5) Let the Y scale (Sy) be sqrt(C^2 + D^2). Divide C, D, and the XY
* shear (K) by it.
*
* (6) At this point, A * D - B * C is either 1 or -1. If it is -1,
* negate the XY shear (K), the X scale (Sx), and A, B, C, and D.
* (Alternatively, we could negate the XY shear (K) and the Y scale
* (Sy).)
*
* (7) Let the rotation be R = atan2(B, A).
*
* Then the resulting decomposed transformation is:
*
* translate(Tx, Ty) rotate(R) skewX(atan(K)) scale(Sx, Sy)
*
* An interesting result of this is that all of the simple transform
* functions (i.e., all functions other than matrix()), in isolation,
* decompose back to themselves except for:
* 'skewY(φ)', which is 'matrix(1, tan(φ), 0, 1, 0, 0)', which decomposes
* to 'rotate(φ) skewX(φ) scale(sec(φ), cos(φ))' since (ignoring the
* alternate sign possibilities that would get fixed in step 6):
* In step 3, the X scale factor is sqrt(1+tan²(φ)) = sqrt(sec²(φ)) = sec(φ).
* Thus, after step 3, A = 1/sec(φ) = cos(φ) and B = tan(φ) / sec(φ) = sin(φ).
* In step 4, the XY shear is sin(φ).
* Thus, after step 4, C = -cos(φ)sin(φ) and D = 1 - sin²(φ) = cos²(φ).
* Thus, in step 5, the Y scale is sqrt(cos²(φ)(sin²(φ) + cos²(φ)) = cos(φ).
* Thus, after step 5, C = -sin(φ), D = cos(φ), and the XY shear is tan(φ).
* Thus, in step 6, A * D - B * C = cos²(φ) + sin²(φ) = 1.
* In step 7, the rotation is thus φ.
*
* skew(θ, φ), which is matrix(1, tan(φ), tan(θ), 1, 0, 0), which decomposes
* to 'rotate(φ) skewX(θ + φ) scale(sec(φ), cos(φ))' since (ignoring
* the alternate sign possibilities that would get fixed in step 6):
* In step 3, the X scale factor is sqrt(1+tan²(φ)) = sqrt(sec²(φ)) = sec(φ).
* Thus, after step 3, A = 1/sec(φ) = cos(φ) and B = tan(φ) / sec(φ) = sin(φ).
* In step 4, the XY shear is cos(φ)tan(θ) + sin(φ).
* Thus, after step 4,
* C = tan(θ) - cos(φ)(cos(φ)tan(θ) + sin(φ)) = tan(θ)sin²(φ) - cos(φ)sin(φ)
* D = 1 - sin(φ)(cos(φ)tan(θ) + sin(φ)) = cos²(φ) - sin(φ)cos(φ)tan(θ)
* Thus, in step 5, the Y scale is sqrt(C² + D²) =
* sqrt(tan²(θ)(sin⁴(φ) + sin²(φ)cos²(φ)) -
* 2 tan(θ)(sin³(φ)cos(φ) + sin(φ)cos³(φ)) +
* (sin²(φ)cos²(φ) + cos⁴(φ))) =
* sqrt(tan²(θ)sin²(φ) - 2 tan(θ)sin(φ)cos(φ) + cos²(φ)) =
* cos(φ) - tan(θ)sin(φ) (taking the negative of the obvious solution so
* we avoid flipping in step 6).
* After step 5, C = -sin(φ) and D = cos(φ), and the XY shear is
* (cos(φ)tan(θ) + sin(φ)) / (cos(φ) - tan(θ)sin(φ)) =
* (dividing both numerator and denominator by cos(φ))
* (tan(θ) + tan(φ)) / (1 - tan(θ)tan(φ)) = tan(θ + φ).
* (See http://en.wikipedia.org/wiki/List_of_trigonometric_identities .)
* Thus, in step 6, A * D - B * C = cos²(φ) + sin²(φ) = 1.
* In step 7, the rotation is thus φ.
*
* To check this result, we can multiply things back together:
*
* [ cos(φ) -sin(φ) ] [ 1 tan(θ + φ) ] [ sec(φ) 0 ]
* [ sin(φ) cos(φ) ] [ 0 1 ] [ 0 cos(φ) ]
*
* [ cos(φ) cos(φ)tan(θ + φ) - sin(φ) ] [ sec(φ) 0 ]
* [ sin(φ) sin(φ)tan(θ + φ) + cos(φ) ] [ 0 cos(φ) ]
*
* but since tan(θ + φ) = (tan(θ) + tan(φ)) / (1 - tan(θ)tan(φ)),
* cos(φ)tan(θ + φ) - sin(φ)
* = cos(φ)(tan(θ) + tan(φ)) - sin(φ) + sin(φ)tan(θ)tan(φ)
* = cos(φ)tan(θ) + sin(φ) - sin(φ) + sin(φ)tan(θ)tan(φ)
* = cos(φ)tan(θ) + sin(φ)tan(θ)tan(φ)
* = tan(θ) (cos(φ) + sin(φ)tan(φ))
* = tan(θ) sec(φ) (cos²(φ) + sin²(φ))
* = tan(θ) sec(φ)
* and
* sin(φ)tan(θ + φ) + cos(φ)
* = sin(φ)(tan(θ) + tan(φ)) + cos(φ) - cos(φ)tan(θ)tan(φ)
* = tan(θ) (sin(φ) - sin(φ)) + sin(φ)tan(φ) + cos(φ)
* = sec(φ) (sin²(φ) + cos²(φ))
* = sec(φ)
* so the above is:
* [ cos(φ) tan(θ) sec(φ) ] [ sec(φ) 0 ]
* [ sin(φ) sec(φ) ] [ 0 cos(φ) ]
*
* [ 1 tan(θ) ]
* [ tan(φ) 1 ]
*/
/*
* DecomposeMatrix implements the non-translation parts of the above
* decomposition algorithm.
*/
static PRBool
DecomposeMatrix(const nsStyleTransformMatrix &aMatrix,
float &aRotate, float &aXYShear, float &aScaleX, float &aScaleY)
{
float A = aMatrix.GetMainMatrixEntry(0),
B = aMatrix.GetMainMatrixEntry(1),
C = aMatrix.GetMainMatrixEntry(2),
D = aMatrix.GetMainMatrixEntry(3);
if (A * D == B * C) {
// singular matrix
return PR_FALSE;
}
float scaleX = sqrt(A * A + B * B);
A /= scaleX;
B /= scaleX;
float XYshear = A * C + B * D;
C -= A * XYshear;
D -= B * XYshear;
float scaleY = sqrt(C * C + D * D);
C /= scaleY;
D /= scaleY;
XYshear /= scaleY;
// A*D - B*C should now be 1 or -1
NS_ASSERTION(0.99 < PR_ABS(A*D - B*C) && PR_ABS(A*D - B*C) < 1.01,
"determinant should now be 1 or -1");
if (A * D < B * C) {
A = -A;
B = -B;
C = -C;
D = -D;
XYshear = -XYshear;
scaleX = -scaleX;
}
float rotation = atan2f(B, A);
aRotate = rotation;
aXYShear = XYshear;
aScaleX = scaleX;
aScaleY = scaleY;
return PR_TRUE;
}
static nsCSSValueList*
AddTransformMatrix(const nsStyleTransformMatrix &aMatrix1, double aCoeff1,
const nsStyleTransformMatrix &aMatrix2, double aCoeff2)
{
nsAutoPtr<nsCSSValueList> result;
nsCSSValueList **resultTail = getter_Transfers(result);
nsRefPtr<nsCSSValue::Array> arr;
// The translation part of the matrix comes first in our result list,
// but it's complicated by the mix of %s, possibly in between rotates.
// append a rotate(90deg)
arr = AppendTransformFunction(eCSSKeyword_rotate, resultTail);
arr->Item(1).SetFloatValue(float(M_PI_2), eCSSUnit_Radian);
// append the translation for parts of the % translation components
// that were from inside a rotation
float rtranslateXPercent =
aMatrix1.GetWidthRelativeYTranslation() * aCoeff1 +
aMatrix2.GetWidthRelativeYTranslation() * aCoeff2;
float rtranslateYPercent =
- (aMatrix1.GetHeightRelativeXTranslation() * aCoeff1 +
aMatrix2.GetHeightRelativeXTranslation() * aCoeff2);
arr = AppendTransformFunction(eCSSKeyword_translate, resultTail);
arr->Item(1).SetPercentValue(rtranslateXPercent);
arr->Item(2).SetPercentValue(rtranslateYPercent);
// append a rotate(-90deg)
arr = AppendTransformFunction(eCSSKeyword_rotate, resultTail);
arr->Item(1).SetFloatValue(-float(M_PI_2), eCSSUnit_Radian);
nscoord translateXCoord = NSToCoordRound(
aMatrix1.GetCoordXTranslation() * aCoeff1 +
aMatrix2.GetCoordXTranslation() * aCoeff2);
nscoord translateYCoord = NSToCoordRound(
aMatrix1.GetCoordYTranslation() * aCoeff1 +
aMatrix2.GetCoordYTranslation() * aCoeff2);
float translateXPercent = aMatrix1.GetWidthRelativeXTranslation() * aCoeff1 +
aMatrix2.GetWidthRelativeXTranslation() * aCoeff2;
float translateYPercent = aMatrix1.GetHeightRelativeYTranslation() * aCoeff1 +
aMatrix2.GetHeightRelativeYTranslation() * aCoeff2;
float rotate1, XYshear1, scaleX1, scaleY1;
DecomposeMatrix(aMatrix1, rotate1, XYshear1, scaleX1, scaleY1);
float rotate2, XYshear2, scaleX2, scaleY2;
DecomposeMatrix(aMatrix2, rotate2, XYshear2, scaleX2, scaleY2);
float rotate = rotate1 * aCoeff1 + rotate2 * aCoeff2;
float skewX = atanf(XYshear1) * aCoeff1 + atanf(XYshear2) * aCoeff2;
// Handle scale, and the two matrix components where identity is 1, by
// subtracting 1, multiplying by the coefficients, and then adding 1
// back. This gets the right AddWeighted behavior and gets us the
// interpolation-against-identity behavior for free.
float scaleX =
((scaleX1 - 1.0f) * aCoeff1 + (scaleX2 - 1.0f) * aCoeff2) + 1.0f;
float scaleY =
((scaleY1 - 1.0f) * aCoeff1 + (scaleY2 - 1.0f) * aCoeff2) + 1.0f;
// It's simpler to append an additional function for the percentage
// translate parts than to build a calc() expression.
arr = AppendTransformFunction(eCSSKeyword_translate, resultTail);
arr->Item(1).SetPercentValue(translateXPercent);
arr->Item(2).SetPercentValue(translateYPercent);
arr = AppendTransformFunction(eCSSKeyword_translate, resultTail);
arr->Item(1).SetFloatValue(
nsPresContext::AppUnitsToFloatCSSPixels(translateXCoord), eCSSUnit_Pixel);
arr->Item(2).SetFloatValue(
nsPresContext::AppUnitsToFloatCSSPixels(translateYCoord), eCSSUnit_Pixel);
arr = AppendTransformFunction(eCSSKeyword_rotate, resultTail);
arr->Item(1).SetFloatValue(rotate, eCSSUnit_Radian);
arr = AppendTransformFunction(eCSSKeyword_skewx, resultTail);
arr->Item(1).SetFloatValue(skewX, eCSSUnit_Radian);
arr = AppendTransformFunction(eCSSKeyword_scale, resultTail);
arr->Item(1).SetFloatValue(scaleX, eCSSUnit_Number);
arr->Item(2).SetFloatValue(scaleY, eCSSUnit_Number);
return result.forget();
}
static nsCSSValueList*
AddTransformLists(const nsCSSValueList* aList1, double aCoeff1,
const nsCSSValueList* aList2, double aCoeff2)
{
nsAutoPtr<nsCSSValueList> result;
nsCSSValueList **resultTail = getter_Transfers(result);
do {
const nsCSSValue::Array *a1 = aList1->mValue.GetArrayValue(),
*a2 = aList2->mValue.GetArrayValue();
NS_ABORT_IF_FALSE(nsStyleTransformMatrix::TransformFunctionOf(a1) ==
nsStyleTransformMatrix::TransformFunctionOf(a2),
"transform function mismatch");
nsCSSKeyword tfunc = nsStyleTransformMatrix::TransformFunctionOf(a1);
nsRefPtr<nsCSSValue::Array> arr;
if (tfunc != eCSSKeyword_matrix) {
arr = AppendTransformFunction(tfunc, resultTail);
}
switch (tfunc) {
case eCSSKeyword_translate: {
NS_ABORT_IF_FALSE(a1->Count() == 2 || a1->Count() == 3,
"unexpected count");
NS_ABORT_IF_FALSE(a2->Count() == 2 || a2->Count() == 3,
"unexpected count");
// FIXME: This would produce fewer calc() expressions if the
// zero were of compatible type (length vs. percent) when
// needed.
nsCSSValue zero(0.0f, eCSSUnit_Pixel);
// Add Y component of translation.
AddTransformTranslate(a1->Count() == 3 ? a1->Item(2) : zero,
aCoeff1,
a2->Count() == 3 ? a2->Item(2) : zero,
aCoeff2,
arr->Item(2));
// Add X component of translation (which can be merged with case
// below in non-DEBUG).
AddTransformTranslate(a1->Item(1), aCoeff1, a2->Item(1), aCoeff2,
arr->Item(1));
break;
}
case eCSSKeyword_translatex:
case eCSSKeyword_translatey: {
NS_ABORT_IF_FALSE(a1->Count() == 2, "unexpected count");
NS_ABORT_IF_FALSE(a2->Count() == 2, "unexpected count");
AddTransformTranslate(a1->Item(1), aCoeff1, a2->Item(1), aCoeff2,
arr->Item(1));
break;
}
case eCSSKeyword_scale: {
NS_ABORT_IF_FALSE(a1->Count() == 2 || a1->Count() == 3,
"unexpected count");
NS_ABORT_IF_FALSE(a2->Count() == 2 || a2->Count() == 3,
"unexpected count");
// This is different from skew() and translate(), since an
// omitted second parameter repeats the first rather than being
// zero.
// Add Y component of scale.
AddTransformScale(a1->Count() == 3 ? a1->Item(2) : a1->Item(1),
aCoeff1,
a2->Count() == 3 ? a2->Item(2) : a2->Item(1),
aCoeff2,
arr->Item(2));
// Add X component of scale (which can be merged with case below
// in non-DEBUG).
AddTransformScale(a1->Item(1), aCoeff1, a2->Item(1), aCoeff2,
arr->Item(1));
break;
}
case eCSSKeyword_scalex:
case eCSSKeyword_scaley: {
NS_ABORT_IF_FALSE(a1->Count() == 2, "unexpected count");
NS_ABORT_IF_FALSE(a2->Count() == 2, "unexpected count");
AddTransformScale(a1->Item(1), aCoeff1, a2->Item(1), aCoeff2,
arr->Item(1));
break;
}
// It would probably be nicer to animate skew in tangent space
// rather than angle space. However, it's easy to specify
// skews with infinite tangents, and behavior changes pretty
// drastically when crossing such skews (since the direction of
// animation flips), so interop is probably more important here.
case eCSSKeyword_skew: {
NS_ABORT_IF_FALSE(a1->Count() == 2 || a1->Count() == 3,
"unexpected count");
NS_ABORT_IF_FALSE(a2->Count() == 2 || a2->Count() == 3,
"unexpected count");
nsCSSValue zero(0.0f, eCSSUnit_Radian);
// Add Y component of skew.
AddCSSValueAngle(a1->Count() == 3 ? a1->Item(2) : zero,
aCoeff1,
a2->Count() == 3 ? a2->Item(2) : zero,
aCoeff2,
arr->Item(2));
// Add X component of skew (which can be merged with case below
// in non-DEBUG).
AddCSSValueAngle(a1->Item(1), aCoeff1, a2->Item(1), aCoeff2,
arr->Item(1));
break;
}
case eCSSKeyword_skewx:
case eCSSKeyword_skewy:
case eCSSKeyword_rotate: {
NS_ABORT_IF_FALSE(a1->Count() == 2, "unexpected count");
NS_ABORT_IF_FALSE(a2->Count() == 2, "unexpected count");
AddCSSValueAngle(a1->Item(1), aCoeff1, a2->Item(1), aCoeff2,
arr->Item(1));
break;
}
case eCSSKeyword_matrix: {
NS_ABORT_IF_FALSE(a1->Count() == 7, "unexpected count");
NS_ABORT_IF_FALSE(a2->Count() == 7, "unexpected count");
PRBool dummy;
nsStyleTransformMatrix matrix1, matrix2;
matrix1.SetToTransformFunction(a1, nsnull, nsnull, dummy);
matrix2.SetToTransformFunction(a2, nsnull, nsnull, dummy);
*resultTail =
AddTransformMatrix(matrix1, aCoeff1, matrix2, aCoeff2);
while ((*resultTail)->mNext) {
resultTail = &(*resultTail)->mNext;
}
break;
}
default:
NS_ABORT_IF_FALSE(PR_FALSE, "unknown transform function");
}
aList1 = aList1->mNext;
aList2 = aList2->mNext;
} while (aList1);
NS_ABORT_IF_FALSE(!aList2, "list length mismatch");
return result.forget();
}
PRBool
nsStyleAnimation::AddWeighted(nsCSSProperty aProperty,
double aCoeff1, const Value& aValue1,
double aCoeff2, const Value& aValue2,
Value& aResultValue)
{
Unit commonUnit =
GetCommonUnit(aProperty, aValue1.GetUnit(), aValue2.GetUnit());
// Maybe need a followup method to convert the inputs into the common
// unit-type, if they don't already match it. (Or would it make sense to do
// that in GetCommonUnit? in which case maybe ConvertToCommonUnit would be
// better.)
switch (commonUnit) {
case eUnit_Null:
case eUnit_Auto:
case eUnit_None:
case eUnit_Normal:
case eUnit_UnparsedString:
return PR_FALSE;
case eUnit_Enumerated:
switch (aProperty) {
case eCSSProperty_font_stretch: {
// Animate just like eUnit_Integer.
PRInt32 result = NS_floor(aCoeff1 * double(aValue1.GetIntValue()) +
aCoeff2 * double(aValue2.GetIntValue()));
aResultValue.SetIntValue(result, eUnit_Enumerated);
return PR_TRUE;
}
default:
return PR_FALSE;
}
case eUnit_Visibility: {
PRInt32 val1 = aValue1.GetIntValue() == NS_STYLE_VISIBILITY_VISIBLE;
PRInt32 val2 = aValue2.GetIntValue() == NS_STYLE_VISIBILITY_VISIBLE;
double interp = aCoeff1 * val1 + aCoeff2 * val2;
PRInt32 result = interp > 0.0 ? NS_STYLE_VISIBILITY_VISIBLE
: NS_STYLE_VISIBILITY_HIDDEN;
aResultValue.SetIntValue(result, eUnit_Visibility);
return PR_TRUE;
}
case eUnit_Integer: {
// http://dev.w3.org/csswg/css3-transitions/#animation-of-property-types-
// says we should use floor
PRInt32 result = NS_floor(aCoeff1 * double(aValue1.GetIntValue()) +
aCoeff2 * double(aValue2.GetIntValue()));
if (aProperty == eCSSProperty_font_weight) {
NS_ASSERTION(result > 0, "unexpected value");
result -= result % 100;
}
aResultValue.SetIntValue(result, eUnit_Integer);
return PR_TRUE;
}
case eUnit_Coord: {
aResultValue.SetCoordValue(NSToCoordRound(
aCoeff1 * aValue1.GetCoordValue() +
aCoeff2 * aValue2.GetCoordValue()));
return PR_TRUE;
}
case eUnit_Percent: {
aResultValue.SetPercentValue(
aCoeff1 * aValue1.GetPercentValue() +
aCoeff2 * aValue2.GetPercentValue());
return PR_TRUE;
}
case eUnit_Float: {
aResultValue.SetFloatValue(
aCoeff1 * aValue1.GetFloatValue() +
aCoeff2 * aValue2.GetFloatValue());
return PR_TRUE;
}
case eUnit_Color: {
nscolor color1 = aValue1.GetColorValue();
nscolor color2 = aValue2.GetColorValue();
// FIXME (spec): The CSS transitions spec doesn't say whether
// colors are premultiplied, but things work better when they are,
// so use premultiplication. Spec issue is still open per
// http://lists.w3.org/Archives/Public/www-style/2009Jul/0050.html
// To save some math, scale the alpha down to a 0-1 scale, but
// leave the color components on a 0-255 scale.
double A1 = NS_GET_A(color1) * (1.0 / 255.0);
double R1 = NS_GET_R(color1) * A1;
double G1 = NS_GET_G(color1) * A1;
double B1 = NS_GET_B(color1) * A1;
double A2 = NS_GET_A(color2) * (1.0 / 255.0);
double R2 = NS_GET_R(color2) * A2;
double G2 = NS_GET_G(color2) * A2;
double B2 = NS_GET_B(color2) * A2;
double Aresf = (A1 * aCoeff1 + A2 * aCoeff2);
nscolor resultColor;
if (Aresf <= 0.0) {
resultColor = NS_RGBA(0, 0, 0, 0);
} else {
if (Aresf > 1.0) {
Aresf = 1.0;
}
double factor = 1.0 / Aresf;
PRUint8 Ares = NSToIntRound(Aresf * 255.0);
PRUint8 Rres = ClampColor((R1 * aCoeff1 + R2 * aCoeff2) * factor);
PRUint8 Gres = ClampColor((G1 * aCoeff1 + G2 * aCoeff2) * factor);
PRUint8 Bres = ClampColor((B1 * aCoeff1 + B2 * aCoeff2) * factor);
resultColor = NS_RGBA(Rres, Gres, Bres, Ares);
}
aResultValue.SetColorValue(resultColor);
return PR_TRUE;
}
case eUnit_Calc: {
CalcValue v1 = ExtractCalcValue(aValue1);
CalcValue v2 = ExtractCalcValue(aValue2);
double len = aCoeff1 * v1.mLength + aCoeff2 * v2.mLength;
double pct = aCoeff1 * v1.mPercent + aCoeff2 * v2.mPercent;
PRBool hasPct = (aCoeff1 != 0.0 && v1.mHasPercent) ||
(aCoeff2 != 0.0 && v2.mHasPercent);
nsCSSValue *val = new nsCSSValue();
nsCSSValue::Array *arr = nsCSSValue::Array::Create(1);
val->SetArrayValue(arr, eCSSUnit_Calc);
if (hasPct) {
nsCSSValue::Array *arr2 = nsCSSValue::Array::Create(2);
arr2->Item(0).SetFloatValue(len, eCSSUnit_Pixel);
arr2->Item(1).SetPercentValue(pct);
arr->Item(0).SetArrayValue(arr2, eCSSUnit_Calc_Plus);
} else {
arr->Item(0).SetFloatValue(len, eCSSUnit_Pixel);
}
aResultValue.SetAndAdoptCSSValueValue(val, eUnit_Calc);
return PR_TRUE;
}
case eUnit_CSSValuePair: {
const nsCSSValuePair *pair1 = aValue1.GetCSSValuePairValue();
const nsCSSValuePair *pair2 = aValue2.GetCSSValuePairValue();
nsCSSUnit unit[2];
unit[0] = GetCommonUnit(aProperty, pair1->mXValue.GetUnit(),
pair2->mXValue.GetUnit());
unit[1] = GetCommonUnit(aProperty, pair1->mYValue.GetUnit(),
pair2->mYValue.GetUnit());
if (unit[0] == eCSSUnit_Null || unit[1] == eCSSUnit_Null ||
unit[0] == eCSSUnit_URL) {
return PR_FALSE;
}
nsAutoPtr<nsCSSValuePair> result(new nsCSSValuePair);
static nsCSSValue nsCSSValuePair::* const pairValues[2] = {
&nsCSSValuePair::mXValue, &nsCSSValuePair::mYValue
};
for (PRUint32 i = 0; i < 2; ++i) {
nsCSSValue nsCSSValuePair::*member = pairValues[i];
switch (unit[i]) {
case eCSSUnit_Pixel:
AddCSSValuePixel(aCoeff1, pair1->*member, aCoeff2, pair2->*member,
result->*member);
break;
case eCSSUnit_Percent:
AddCSSValuePercent(aCoeff1, pair1->*member,
aCoeff2, pair2->*member,
result->*member);
break;
case eCSSUnit_Calc:
AddCSSValueCanonicalCalc(aCoeff1, pair1->*member,
aCoeff2, pair2->*member,
result->*member);
break;
default:
NS_ABORT_IF_FALSE(PR_FALSE, "unexpected unit");
return PR_FALSE;
}
}
aResultValue.SetAndAdoptCSSValuePairValue(result.forget(),
eUnit_CSSValuePair);
return PR_TRUE;
}
case eUnit_CSSRect: {
const nsCSSRect *rect1 = aValue1.GetCSSRectValue();
const nsCSSRect *rect2 = aValue2.GetCSSRectValue();
if (rect1->mTop.GetUnit() != rect2->mTop.GetUnit() ||
rect1->mRight.GetUnit() != rect2->mRight.GetUnit() ||
rect1->mBottom.GetUnit() != rect2->mBottom.GetUnit() ||
rect1->mLeft.GetUnit() != rect2->mLeft.GetUnit()) {
// At least until we have calc()
return PR_FALSE;
}
nsAutoPtr<nsCSSRect> result(new nsCSSRect);
for (PRUint32 i = 0; i < NS_ARRAY_LENGTH(nsCSSRect::sides); ++i) {
nsCSSValue nsCSSRect::*member = nsCSSRect::sides[i];
NS_ABORT_IF_FALSE((rect1->*member).GetUnit() ==
(rect2->*member).GetUnit(),
"should have returned above");
switch ((rect1->*member).GetUnit()) {
case eCSSUnit_Pixel:
AddCSSValuePixel(aCoeff1, rect1->*member, aCoeff2, rect2->*member,
result->*member);
break;
case eCSSUnit_Auto:
if (float(aCoeff1 + aCoeff2) != 1.0f) {
// Interpolating between two auto values makes sense;
// adding in other ratios does not.
return PR_FALSE;
}
(result->*member).SetAutoValue();
break;
default:
NS_ABORT_IF_FALSE(PR_FALSE, "unexpected unit");
return PR_FALSE;
}
}
aResultValue.SetAndAdoptCSSRectValue(result.forget(), eUnit_CSSRect);
return PR_TRUE;
}
case eUnit_Dasharray: {
const nsCSSValueList *list1 = aValue1.GetCSSValueListValue();
const nsCSSValueList *list2 = aValue2.GetCSSValueListValue();
PRUint32 len1 = 0, len2 = 0;
for (const nsCSSValueList *v = list1; v; v = v->mNext) {
++len1;
}
for (const nsCSSValueList *v = list2; v; v = v->mNext) {
++len2;
}
NS_ABORT_IF_FALSE(len1 > 0 && len2 > 0, "unexpected length");
if (list1->mValue.GetUnit() == eCSSUnit_None ||
list2->mValue.GetUnit() == eCSSUnit_None) {
// One of our values is "none". Can't do addition with that.
NS_ABORT_IF_FALSE(
(list1->mValue.GetUnit() != eCSSUnit_None || len1 == 1) &&
(list2->mValue.GetUnit() != eCSSUnit_None || len2 == 1),
"multi-value valuelist with 'none' as first element");
return PR_FALSE;
}
nsAutoPtr<nsCSSValueList> result;
nsCSSValueList **resultTail = getter_Transfers(result);
for (PRUint32 i = 0, i_end = lcm(len1, len2); i != i_end; ++i) {
const nsCSSValue &v1 = list1->mValue;
const nsCSSValue &v2 = list2->mValue;
NS_ABORT_IF_FALSE(v1.GetUnit() == eCSSUnit_Number ||
v1.GetUnit() == eCSSUnit_Percent, "unexpected");
NS_ABORT_IF_FALSE(v2.GetUnit() == eCSSUnit_Number ||
v2.GetUnit() == eCSSUnit_Percent, "unexpected");
if (v1.GetUnit() != v2.GetUnit()) {
// Can't animate between lengths and percentages (until calc()).
return PR_FALSE;
}
nsCSSValueList *item = new nsCSSValueList;
if (!item) {
return PR_FALSE;
}
*resultTail = item;
resultTail = &item->mNext;
if (v1.GetUnit() == eCSSUnit_Number) {
AddCSSValueNumber(aCoeff1, v1, aCoeff2, v2, item->mValue);
} else {
AddCSSValuePercent(aCoeff1, v1, aCoeff2, v2, item->mValue);
}
list1 = list1->mNext;
if (!list1) {
list1 = aValue1.GetCSSValueListValue();
}
list2 = list2->mNext;
if (!list2) {
list2 = aValue2.GetCSSValueListValue();
}
}
aResultValue.SetAndAdoptCSSValueListValue(result.forget(),
eUnit_Dasharray);
return PR_TRUE;
}
case eUnit_Shadow: {
// This is implemented according to:
// http://dev.w3.org/csswg/css3-transitions/#animation-of-property-types-
// and the third item in the summary of:
// http://lists.w3.org/Archives/Public/www-style/2009Jul/0050.html
const nsCSSValueList *shadow1 = aValue1.GetCSSValueListValue();
const nsCSSValueList *shadow2 = aValue2.GetCSSValueListValue();
nsAutoPtr<nsCSSValueList> result;
nsCSSValueList **resultTail = getter_Transfers(result);
while (shadow1 && shadow2) {
if (!AddShadowItems(aCoeff1, shadow1->mValue,
aCoeff2, shadow2->mValue,
resultTail)) {
return PR_FALSE;
}
shadow1 = shadow1->mNext;
shadow2 = shadow2->mNext;
}
if (shadow1 || shadow2) {
const nsCSSValueList *longShadow;
double longCoeff;
if (shadow1) {
longShadow = shadow1;
longCoeff = aCoeff1;
} else {
longShadow = shadow2;
longCoeff = aCoeff2;
}
while (longShadow) {
// Passing coefficients that add to less than 1 produces the
// desired result of interpolating "0 0 0 transparent" with
// the current shadow.
if (!AddShadowItems(longCoeff, longShadow->mValue,
0.0, longShadow->mValue,
resultTail)) {
return PR_FALSE;
}
longShadow = longShadow->mNext;
}
}
aResultValue.SetAndAdoptCSSValueListValue(result.forget(), eUnit_Shadow);
return PR_TRUE;
}
case eUnit_Transform: {
const nsCSSValueList *list1 = aValue1.GetCSSValueListValue();
const nsCSSValueList *list2 = aValue2.GetCSSValueListValue();
// We want to avoid the matrix decomposition when we can, since
// avoiding it can produce better results both for compound
// transforms and for skew and skewY (see below). We can do this
// in two cases:
// (1) if one of the transforms is 'none'
// (2) if the lists have the same length and the transform
// functions match
nsAutoPtr<nsCSSValueList> result;
if (list1->mValue.GetUnit() == eCSSUnit_None) {
if (list2->mValue.GetUnit() == eCSSUnit_None) {
result = new nsCSSValueList;
if (result) {
result->mValue.SetNoneValue();
}
} else {
result = AddTransformLists(list2, aCoeff2, list2, 0);
}
} else {
if (list2->mValue.GetUnit() == eCSSUnit_None) {
result = AddTransformLists(list1, aCoeff1, list1, 0);
} else {
PRBool match = PR_TRUE;
{
const nsCSSValueList *item1 = list1, *item2 = list2;
do {
nsCSSKeyword func1 = nsStyleTransformMatrix::TransformFunctionOf(
item1->mValue.GetArrayValue());
nsCSSKeyword func2 = nsStyleTransformMatrix::TransformFunctionOf(
item2->mValue.GetArrayValue());
if (func1 != func2) {
break;
}
item1 = item1->mNext;
item2 = item2->mNext;
} while (item1 && item2);
if (item1 || item2) {
// Either |break| above or length mismatch.
match = PR_FALSE;
}
}
if (match) {
result = AddTransformLists(list1, aCoeff1, list2, aCoeff2);
} else {
PRBool dummy;
nsStyleTransformMatrix matrix1 =
nsStyleTransformMatrix::ReadTransforms(list1, nsnull, nsnull,
dummy),
matrix2 =
nsStyleTransformMatrix::ReadTransforms(list2, nsnull, nsnull,
dummy);
result = AddTransformMatrix(matrix1, aCoeff1, matrix2, aCoeff2);
}
}
}
aResultValue.SetAndAdoptCSSValueListValue(result.forget(),
eUnit_Transform);
return PR_TRUE;
}
case eUnit_CSSValuePairList: {
const nsCSSValuePairList *list1 = aValue1.GetCSSValuePairListValue();
const nsCSSValuePairList *list2 = aValue2.GetCSSValuePairListValue();
nsAutoPtr<nsCSSValuePairList> result;
nsCSSValuePairList **resultTail = getter_Transfers(result);
do {
nsCSSValuePairList *item = new nsCSSValuePairList;
if (!item) {
return PR_FALSE;
}
*resultTail = item;
resultTail = &item->mNext;
static nsCSSValue nsCSSValuePairList::* const pairListValues[] = {
&nsCSSValuePairList::mXValue,
&nsCSSValuePairList::mYValue,
};
for (PRUint32 i = 0; i < NS_ARRAY_LENGTH(pairListValues); ++i) {
const nsCSSValue &v1 = list1->*(pairListValues[i]);
const nsCSSValue &v2 = list2->*(pairListValues[i]);
nsCSSValue &vr = item->*(pairListValues[i]);
nsCSSUnit unit =
GetCommonUnit(aProperty, v1.GetUnit(), v2.GetUnit());
if (unit == eCSSUnit_Null) {
return PR_FALSE;
}
switch (unit) {
case eCSSUnit_Pixel:
AddCSSValuePixel(aCoeff1, v1, aCoeff2, v2, vr);
break;
case eCSSUnit_Percent:
AddCSSValuePercent(aCoeff1, v1, aCoeff2, v2, vr);
break;
case eCSSUnit_Calc:
AddCSSValueCanonicalCalc(aCoeff1, v1, aCoeff2, v2, vr);
break;
default:
if (v1 != v2) {
return PR_FALSE;
}
vr = v1;
break;
}
}
list1 = list1->mNext;
list2 = list2->mNext;
} while (list1 && list2);
if (list1 || list2) {
// We can't interpolate lists of different lengths.
return PR_FALSE;
}
aResultValue.SetAndAdoptCSSValuePairListValue(result.forget());
return PR_TRUE;
}
}
NS_ABORT_IF_FALSE(false, "Can't interpolate using the given common unit");
return PR_FALSE;
}
already_AddRefed<css::StyleRule>
BuildStyleRule(nsCSSProperty aProperty,
dom::Element* aTargetElement,
const nsAString& aSpecifiedValue,
PRBool aUseSVGMode)
{
// Set up an empty CSS Declaration
nsAutoPtr<css::Declaration> declaration(new css::Declaration());
declaration->InitializeEmpty();
PRBool changed; // ignored, but needed as outparam for ParseProperty
nsIDocument* doc = aTargetElement->GetOwnerDoc();
nsCOMPtr<nsIURI> baseURI = aTargetElement->GetBaseURI();
nsCSSParser parser(doc->CSSLoader());
if (aUseSVGMode) {
#ifdef MOZ_SVG
parser.SetSVGMode(PR_TRUE);
#else
NS_NOTREACHED("aUseSVGMode should not be set");
#endif
}
nsCSSProperty propertyToCheck = nsCSSProps::IsShorthand(aProperty) ?
nsCSSProps::SubpropertyEntryFor(aProperty)[0] : aProperty;
// Get a parser, parse the property, and check for CSS parsing errors.
// If any of these steps fails, we bail out and delete the declaration.
if (NS_FAILED(parser.ParseProperty(aProperty, aSpecifiedValue,
doc->GetDocumentURI(), baseURI,
aTargetElement->NodePrincipal(),
declaration, &changed, PR_FALSE)) ||
// check whether property parsed without CSS parsing errors
!declaration->HasNonImportantValueFor(propertyToCheck)) {
NS_WARNING("failure in BuildStyleRule");
return nsnull;
}
nsRefPtr<css::StyleRule> rule = new css::StyleRule(nsnull, declaration.forget());
return rule.forget();
}
inline
already_AddRefed<nsStyleContext>
LookupStyleContext(dom::Element* aElement)
{
nsIDocument* doc = aElement->GetCurrentDoc();
nsIPresShell* shell = doc->GetShell();
if (!shell) {
return nsnull;
}
return nsComputedDOMStyle::GetStyleContextForElement(aElement, nsnull, shell);
}
/**
* Helper function: StyleWithDeclarationAdded
* Creates a nsStyleRule with the specified property set to the specified
* value, and returns a nsStyleContext for this rule, as a sibling of the
* given element's nsStyleContext.
*
* If we fail to parse |aSpecifiedValue| for |aProperty|, this method will
* return nsnull.
*
* @param aProperty The property whose value we're customizing in the
* custom style context.
* @param aTargetElement The element whose style context we'll use as a
* sibling for our custom style context.
* @param aSpecifiedValue The value for |aProperty| in our custom style
* context.
* @param aUseSVGMode A flag to indicate whether we should parse
* |aSpecifiedValue| in SVG mode.
* @return The generated custom nsStyleContext, or nsnull on failure.
*/
already_AddRefed<nsStyleContext>
StyleWithDeclarationAdded(nsCSSProperty aProperty,
dom::Element* aTargetElement,
const nsAString& aSpecifiedValue,
PRBool aUseSVGMode)
{
NS_ABORT_IF_FALSE(aTargetElement, "null target element");
NS_ABORT_IF_FALSE(aTargetElement->GetCurrentDoc(),
"element needs to be in a document "
"if we're going to look up its style context");
// Look up style context for our target element
nsRefPtr<nsStyleContext> styleContext = LookupStyleContext(aTargetElement);
if (!styleContext) {
return nsnull;
}
// Parse specified value into a temporary StyleRule
nsRefPtr<css::StyleRule> styleRule =
BuildStyleRule(aProperty, aTargetElement, aSpecifiedValue, aUseSVGMode);
if (!styleRule) {
return nsnull;
}
styleRule->RuleMatched();
// Create a temporary nsStyleContext for the style rule
nsCOMArray<nsIStyleRule> ruleArray;
ruleArray.AppendObject(styleRule);
nsStyleSet* styleSet = styleContext->PresContext()->StyleSet();
return styleSet->ResolveStyleByAddingRules(styleContext, ruleArray);
}
PRBool
nsStyleAnimation::ComputeValue(nsCSSProperty aProperty,
dom::Element* aTargetElement,
const nsAString& aSpecifiedValue,
PRBool aUseSVGMode,
Value& aComputedValue)
{
NS_ABORT_IF_FALSE(aTargetElement, "null target element");
NS_ABORT_IF_FALSE(aTargetElement->GetCurrentDoc(),
"we should only be able to actively animate nodes that "
"are in a document");
nsCSSProperty propToParse =
nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_REPORT_OTHER_NAME)
? nsCSSProps::OtherNameFor(aProperty) : aProperty;
nsRefPtr<nsStyleContext> tmpStyleContext =
StyleWithDeclarationAdded(propToParse, aTargetElement,
aSpecifiedValue, aUseSVGMode);
if (!tmpStyleContext) {
return PR_FALSE;
}
if (nsCSSProps::IsShorthand(aProperty) ||
nsCSSProps::kAnimTypeTable[aProperty] == eStyleAnimType_None) {
// Just capture the specified value
aComputedValue.SetUnparsedStringValue(nsString(aSpecifiedValue));
return PR_TRUE;
}
// Extract computed value of our property from the temporary style rule
return ExtractComputedValue(aProperty, tmpStyleContext, aComputedValue);
}
PRBool
nsStyleAnimation::UncomputeValue(nsCSSProperty aProperty,
nsPresContext* aPresContext,
const Value& aComputedValue,
nsCSSValue& aSpecifiedValue)
{
NS_ABORT_IF_FALSE(aPresContext, "null pres context");
switch (aComputedValue.GetUnit()) {
case eUnit_Normal:
aSpecifiedValue.SetNormalValue();
break;
case eUnit_Auto:
aSpecifiedValue.SetAutoValue();
break;
case eUnit_None:
aSpecifiedValue.SetNoneValue();
break;
case eUnit_Enumerated:
case eUnit_Visibility:
aSpecifiedValue.
SetIntValue(aComputedValue.GetIntValue(), eCSSUnit_Enumerated);
break;
case eUnit_Integer:
aSpecifiedValue.
SetIntValue(aComputedValue.GetIntValue(), eCSSUnit_Integer);
break;
case eUnit_Coord:
nscoordToCSSValue(aComputedValue.GetCoordValue(), aSpecifiedValue);
break;
case eUnit_Percent:
aSpecifiedValue.SetPercentValue(aComputedValue.GetPercentValue());
break;
case eUnit_Float:
aSpecifiedValue.
SetFloatValue(aComputedValue.GetFloatValue(), eCSSUnit_Number);
break;
case eUnit_Color:
// colors can be alone, or part of a paint server
aSpecifiedValue.SetColorValue(aComputedValue.GetColorValue());
break;
case eUnit_Calc: {
nsCSSValue *val = aComputedValue.GetCSSValueValue();
NS_ABORT_IF_FALSE(val->GetUnit() == eCSSUnit_Calc, "unexpected unit");
aSpecifiedValue = *val;
break;
}
case eUnit_CSSValuePair: {
// Rule node processing expects pair values to be collapsed to a
// single value if both halves would be equal, for most but not
// all properties. At present, all animatable properties that
// use pairs do expect collapsing.
const nsCSSValuePair* pair = aComputedValue.GetCSSValuePairValue();
if (pair->mXValue == pair->mYValue) {
aSpecifiedValue = pair->mXValue;
} else {
aSpecifiedValue.SetPairValue(pair);
}
} break;
case eUnit_CSSRect: {
nsCSSRect& rect = aSpecifiedValue.SetRectValue();
rect = *aComputedValue.GetCSSRectValue();
} break;
case eUnit_Dasharray:
case eUnit_Shadow:
case eUnit_Transform:
aSpecifiedValue.
SetDependentListValue(aComputedValue.GetCSSValueListValue());
break;
case eUnit_CSSValuePairList:
aSpecifiedValue.
SetDependentPairListValue(aComputedValue.GetCSSValuePairListValue());
break;
default:
return PR_FALSE;
}
return PR_TRUE;
}
PRBool
nsStyleAnimation::UncomputeValue(nsCSSProperty aProperty,
nsPresContext* aPresContext,
const Value& aComputedValue,
nsAString& aSpecifiedValue)
{
NS_ABORT_IF_FALSE(aPresContext, "null pres context");
aSpecifiedValue.Truncate(); // Clear outparam, if it's not already empty
if (aComputedValue.GetUnit() == eUnit_UnparsedString) {
aComputedValue.GetStringValue(aSpecifiedValue);
return PR_TRUE;
}
nsCSSValue val;
if (!nsStyleAnimation::UncomputeValue(aProperty, aPresContext,
aComputedValue, val)) {
return PR_FALSE;
}
val.AppendToString(aProperty, aSpecifiedValue);
return PR_TRUE;
}
inline const void*
StyleDataAtOffset(const void* aStyleStruct, ptrdiff_t aOffset)
{
return reinterpret_cast<const char*>(aStyleStruct) + aOffset;
}
inline void*
StyleDataAtOffset(void* aStyleStruct, ptrdiff_t aOffset)
{
return reinterpret_cast<char*>(aStyleStruct) + aOffset;
}
static void
ExtractBorderColor(nsStyleContext* aStyleContext, const void* aStyleBorder,
mozilla::css::Side aSide, nsStyleAnimation::Value& aComputedValue)
{
nscolor color;
PRBool foreground;
static_cast<const nsStyleBorder*>(aStyleBorder)->
GetBorderColor(aSide, color, foreground);
if (foreground) {
// FIXME: should add test for this
color = aStyleContext->GetStyleColor()->mColor;
}
aComputedValue.SetColorValue(color);
}
static PRBool
StyleCoordToValue(const nsStyleCoord& aCoord, nsStyleAnimation::Value& aValue)
{
switch (aCoord.GetUnit()) {
case eStyleUnit_Normal:
aValue.SetNormalValue();
break;
case eStyleUnit_Auto:
aValue.SetAutoValue();
break;
case eStyleUnit_None:
aValue.SetNoneValue();
break;
case eStyleUnit_Percent:
aValue.SetPercentValue(aCoord.GetPercentValue());
break;
case eStyleUnit_Factor:
aValue.SetFloatValue(aCoord.GetFactorValue());
break;
case eStyleUnit_Coord:
aValue.SetCoordValue(aCoord.GetCoordValue());
break;
case eStyleUnit_Enumerated:
aValue.SetIntValue(aCoord.GetIntValue(),
nsStyleAnimation::eUnit_Enumerated);
break;
case eStyleUnit_Integer:
aValue.SetIntValue(aCoord.GetIntValue(),
nsStyleAnimation::eUnit_Integer);
break;
case eStyleUnit_Calc: {
nsAutoPtr<nsCSSValue> val(new nsCSSValue);
SetCalcValue(aCoord.GetCalcValue(), *val);
aValue.SetAndAdoptCSSValueValue(val.forget(),
nsStyleAnimation::eUnit_Calc);
break;
}
default:
return PR_FALSE;
}
return PR_TRUE;
}
static PRBool
StyleCoordToCSSValue(const nsStyleCoord& aCoord, nsCSSValue& aCSSValue)
{
switch (aCoord.GetUnit()) {
case eStyleUnit_Coord:
nscoordToCSSValue(aCoord.GetCoordValue(), aCSSValue);
break;
case eStyleUnit_Percent:
aCSSValue.SetPercentValue(aCoord.GetPercentValue());
break;
case eStyleUnit_Calc:
SetCalcValue(aCoord.GetCalcValue(), aCSSValue);
break;
default:
NS_ABORT_IF_FALSE(PR_FALSE, "unexpected unit");
return PR_FALSE;
}
return PR_TRUE;
}
/*
* Assign |aOutput = aInput|, except with any non-pixel lengths
* replaced with the equivalent in pixels, and any non-canonical calc()
* expressions replaced with canonical ones.
*/
static void
SubstitutePixelValues(nsStyleContext* aStyleContext,
const nsCSSValue& aInput, nsCSSValue& aOutput)
{
if (aInput.IsCalcUnit()) {
PRBool canStoreInRuleTree = PR_TRUE;
nsRuleNode::ComputedCalc c =
nsRuleNode::SpecifiedCalcToComputedCalc(aInput, aStyleContext,
aStyleContext->PresContext(),
canStoreInRuleTree);
nsStyleCoord::Calc c2;
c2.mLength = c.mLength;
c2.mPercent = c.mPercent;
c2.mHasPercent = PR_TRUE; // doesn't matter for transform translate
SetCalcValue(&c2, aOutput);
} else if (aInput.UnitHasArrayValue()) {
const nsCSSValue::Array *inputArray = aInput.GetArrayValue();
nsRefPtr<nsCSSValue::Array> outputArray =
nsCSSValue::Array::Create(inputArray->Count());
for (size_t i = 0, i_end = inputArray->Count(); i < i_end; ++i) {
SubstitutePixelValues(aStyleContext,
inputArray->Item(i), outputArray->Item(i));
}
aOutput.SetArrayValue(outputArray, aInput.GetUnit());
} else if (aInput.IsLengthUnit() &&
aInput.GetUnit() != eCSSUnit_Pixel) {
PRBool canStoreInRuleTree = PR_TRUE;
nscoord len = nsRuleNode::CalcLength(aInput, aStyleContext,
aStyleContext->PresContext(),
canStoreInRuleTree);
aOutput.SetFloatValue(nsPresContext::AppUnitsToFloatCSSPixels(len),
eCSSUnit_Pixel);
} else {
aOutput = aInput;
}
}
PRBool
nsStyleAnimation::ExtractComputedValue(nsCSSProperty aProperty,
nsStyleContext* aStyleContext,
Value& aComputedValue)
{
NS_ABORT_IF_FALSE(0 <= aProperty &&
aProperty < eCSSProperty_COUNT_no_shorthands,
"bad property");
const void* styleStruct =
aStyleContext->GetStyleData(nsCSSProps::kSIDTable[aProperty]);
ptrdiff_t ssOffset = nsCSSProps::kStyleStructOffsetTable[aProperty];
nsStyleAnimType animType = nsCSSProps::kAnimTypeTable[aProperty];
NS_ABORT_IF_FALSE(0 <= ssOffset || animType == eStyleAnimType_Custom,
"must be dealing with animatable property");
switch (animType) {
case eStyleAnimType_Custom:
switch (aProperty) {
// For border-width, ignore the border-image business (which
// only exists until we update our implementation to the current
// spec) and use GetComputedBorder
#define BORDER_WIDTH_CASE(prop_, side_) \
case prop_: \
aComputedValue.SetCoordValue( \
static_cast<const nsStyleBorder*>(styleStruct)-> \
GetComputedBorder().side_); \
break;
BORDER_WIDTH_CASE(eCSSProperty_border_bottom_width, bottom)
BORDER_WIDTH_CASE(eCSSProperty_border_left_width_value, left)
BORDER_WIDTH_CASE(eCSSProperty_border_right_width_value, right)
BORDER_WIDTH_CASE(eCSSProperty_border_top_width, top)
#undef BORDER_WIDTH_CASE
case eCSSProperty__moz_column_rule_width:
aComputedValue.SetCoordValue(
static_cast<const nsStyleColumn*>(styleStruct)->
GetComputedColumnRuleWidth());
break;
case eCSSProperty_border_bottom_color:
ExtractBorderColor(aStyleContext, styleStruct, NS_SIDE_BOTTOM,
aComputedValue);
break;
case eCSSProperty_border_left_color_value:
ExtractBorderColor(aStyleContext, styleStruct, NS_SIDE_LEFT,
aComputedValue);
break;
case eCSSProperty_border_right_color_value:
ExtractBorderColor(aStyleContext, styleStruct, NS_SIDE_RIGHT,
aComputedValue);
break;
case eCSSProperty_border_top_color:
ExtractBorderColor(aStyleContext, styleStruct, NS_SIDE_TOP,
aComputedValue);
break;
case eCSSProperty_outline_color: {
const nsStyleOutline *styleOutline =
static_cast<const nsStyleOutline*>(styleStruct);
nscolor color;
#ifdef GFX_HAS_INVERT
// This isn't right. And note that outline drawing itself
// goes through this codepath via GetVisitedDependentColor.
styleOutline->GetOutlineColor(color);
#else
if (!styleOutline->GetOutlineColor(color))
color = aStyleContext->GetStyleColor()->mColor;
#endif
aComputedValue.SetColorValue(color);
break;
}
case eCSSProperty__moz_column_rule_color: {
const nsStyleColumn *styleColumn =
static_cast<const nsStyleColumn*>(styleStruct);
nscolor color;
if (styleColumn->mColumnRuleColorIsForeground) {
color = aStyleContext->GetStyleColor()->mColor;
} else {
color = styleColumn->mColumnRuleColor;
}
aComputedValue.SetColorValue(color);
break;
}
case eCSSProperty__moz_column_count: {
const nsStyleColumn *styleColumn =
static_cast<const nsStyleColumn*>(styleStruct);
if (styleColumn->mColumnCount == NS_STYLE_COLUMN_COUNT_AUTO) {
aComputedValue.SetAutoValue();
} else {
aComputedValue.SetIntValue(styleColumn->mColumnCount,
eUnit_Integer);
}
break;
}
case eCSSProperty_text_decoration_color: {
const nsStyleTextReset *styleTextReset =
static_cast<const nsStyleTextReset*>(styleStruct);
nscolor color;
PRBool isForeground;
styleTextReset->GetDecorationColor(color, isForeground);
if (isForeground) {
color = aStyleContext->GetStyleColor()->mColor;
}
aComputedValue.SetColorValue(color);
break;
}
case eCSSProperty_text_decoration_style: {
PRUint8 decorationStyle =
static_cast<const nsStyleTextReset*>(styleStruct)->
GetDecorationStyle();
aComputedValue.SetIntValue(decorationStyle, eUnit_Enumerated);
break;
}
case eCSSProperty_border_spacing: {
const nsStyleTableBorder *styleTableBorder =
static_cast<const nsStyleTableBorder*>(styleStruct);
nsAutoPtr<nsCSSValuePair> pair(new nsCSSValuePair);
if (!pair) {
return PR_FALSE;
}
nscoordToCSSValue(styleTableBorder->mBorderSpacingX, pair->mXValue);
nscoordToCSSValue(styleTableBorder->mBorderSpacingY, pair->mYValue);
aComputedValue.SetAndAdoptCSSValuePairValue(pair.forget(),
eUnit_CSSValuePair);
break;
}
case eCSSProperty__moz_transform_origin: {
const nsStyleDisplay *styleDisplay =
static_cast<const nsStyleDisplay*>(styleStruct);
nsAutoPtr<nsCSSValuePair> pair(new nsCSSValuePair);
if (!pair ||
!StyleCoordToCSSValue(styleDisplay->mTransformOrigin[0],
pair->mXValue) ||
!StyleCoordToCSSValue(styleDisplay->mTransformOrigin[1],
pair->mYValue)) {
return PR_FALSE;
}
aComputedValue.SetAndAdoptCSSValuePairValue(pair.forget(),
eUnit_CSSValuePair);
break;
}
case eCSSProperty_stroke_dasharray: {
const nsStyleSVG *svg = static_cast<const nsStyleSVG*>(styleStruct);
NS_ABORT_IF_FALSE((svg->mStrokeDasharray != nsnull) ==
(svg->mStrokeDasharrayLength != 0),
"pointer/length mismatch");
nsAutoPtr<nsCSSValueList> result;
if (svg->mStrokeDasharray) {
NS_ABORT_IF_FALSE(svg->mStrokeDasharrayLength > 0,
"non-null list should have positive length");
nsCSSValueList **resultTail = getter_Transfers(result);
for (PRUint32 i = 0, i_end = svg->mStrokeDasharrayLength;
i != i_end; ++i) {
nsCSSValueList *item = new nsCSSValueList;
if (!item) {
return PR_FALSE;
}
*resultTail = item;
resultTail = &item->mNext;
const nsStyleCoord &coord = svg->mStrokeDasharray[i];
nsCSSValue &value = item->mValue;
switch (coord.GetUnit()) {
case eStyleUnit_Coord:
// Number means the same thing as length; we want to
// animate them the same way. Normalize both to number
// since it has more accuracy (float vs nscoord).
value.SetFloatValue(nsPresContext::
AppUnitsToFloatCSSPixels(coord.GetCoordValue()),
eCSSUnit_Number);
break;
case eStyleUnit_Factor:
value.SetFloatValue(coord.GetFactorValue(),
eCSSUnit_Number);
break;
case eStyleUnit_Percent:
value.SetPercentValue(coord.GetPercentValue());
break;
default:
NS_ABORT_IF_FALSE(PR_FALSE, "unexpected unit");
return PR_FALSE;
}
}
} else {
result = new nsCSSValueList;
if (!result) {
return PR_FALSE;
}
result->mValue.SetNoneValue();
}
aComputedValue.SetAndAdoptCSSValueListValue(result.forget(),
eUnit_Dasharray);
break;
}
case eCSSProperty_font_stretch: {
PRInt16 stretch =
static_cast<const nsStyleFont*>(styleStruct)->mFont.stretch;
PR_STATIC_ASSERT(NS_STYLE_FONT_STRETCH_ULTRA_CONDENSED == -4);
PR_STATIC_ASSERT(NS_STYLE_FONT_STRETCH_ULTRA_EXPANDED == 4);
if (stretch < NS_STYLE_FONT_STRETCH_ULTRA_CONDENSED ||
stretch > NS_STYLE_FONT_STRETCH_ULTRA_EXPANDED) {
return PR_FALSE;
}
aComputedValue.SetIntValue(stretch, eUnit_Enumerated);
return PR_TRUE;
}
case eCSSProperty_font_weight: {
PRUint16 weight =
static_cast<const nsStyleFont*>(styleStruct)->mFont.weight;
if (weight % 100 != 0) {
return PR_FALSE;
}
aComputedValue.SetIntValue(weight, eUnit_Integer);
return PR_TRUE;
}
case eCSSProperty_image_region: {
const nsStyleList *list =
static_cast<const nsStyleList*>(styleStruct);
const nsRect &srect = list->mImageRegion;
if (srect.IsEmpty()) {
aComputedValue.SetAutoValue();
break;
}
nsCSSRect *vrect = new nsCSSRect;
nscoordToCSSValue(srect.x, vrect->mLeft);
nscoordToCSSValue(srect.y, vrect->mTop);
nscoordToCSSValue(srect.XMost(), vrect->mRight);
nscoordToCSSValue(srect.YMost(), vrect->mBottom);
aComputedValue.SetAndAdoptCSSRectValue(vrect, eUnit_CSSRect);
break;
}
case eCSSProperty_clip: {
const nsStyleDisplay *display =
static_cast<const nsStyleDisplay*>(styleStruct);
if (!(display->mClipFlags & NS_STYLE_CLIP_RECT)) {
aComputedValue.SetAutoValue();
} else {
nsCSSRect *vrect = new nsCSSRect;
const nsRect &srect = display->mClip;
if (display->mClipFlags & NS_STYLE_CLIP_TOP_AUTO) {
vrect->mTop.SetAutoValue();
} else {
nscoordToCSSValue(srect.y, vrect->mTop);
}
if (display->mClipFlags & NS_STYLE_CLIP_RIGHT_AUTO) {
vrect->mRight.SetAutoValue();
} else {
nscoordToCSSValue(srect.XMost(), vrect->mRight);
}
if (display->mClipFlags & NS_STYLE_CLIP_BOTTOM_AUTO) {
vrect->mBottom.SetAutoValue();
} else {
nscoordToCSSValue(srect.YMost(), vrect->mBottom);
}
if (display->mClipFlags & NS_STYLE_CLIP_LEFT_AUTO) {
vrect->mLeft.SetAutoValue();
} else {
nscoordToCSSValue(srect.x, vrect->mLeft);
}
aComputedValue.SetAndAdoptCSSRectValue(vrect, eUnit_CSSRect);
}
break;
}
case eCSSProperty_background_position: {
const nsStyleBackground *bg =
static_cast<const nsStyleBackground*>(styleStruct);
nsAutoPtr<nsCSSValuePairList> result;
nsCSSValuePairList **resultTail = getter_Transfers(result);
NS_ABORT_IF_FALSE(bg->mPositionCount > 0, "unexpected count");
for (PRUint32 i = 0, i_end = bg->mPositionCount; i != i_end; ++i) {
nsCSSValuePairList *item = new nsCSSValuePairList;
*resultTail = item;
resultTail = &item->mNext;
const nsStyleBackground::Position &pos = bg->mLayers[i].mPosition;
if (pos.mXPosition.mLength == 0) {
item->mXValue.SetPercentValue(pos.mXPosition.mPercent);
} else if (pos.mXPosition.mPercent == 0.0f) {
nscoordToCSSValue(pos.mXPosition.mLength, item->mXValue);
} else {
nsStyleCoord::Calc calc;
calc.mLength = pos.mXPosition.mLength;
calc.mPercent = pos.mXPosition.mPercent;
calc.mHasPercent = PR_TRUE;
SetCalcValue(&calc, item->mXValue);
}
if (pos.mYPosition.mLength == 0) {
item->mYValue.SetPercentValue(pos.mYPosition.mPercent);
} else if (pos.mYPosition.mPercent == 0.0f) {
nscoordToCSSValue(pos.mYPosition.mLength, item->mYValue);
} else {
nsStyleCoord::Calc calc;
calc.mLength = pos.mYPosition.mLength;
calc.mPercent = pos.mYPosition.mPercent;
calc.mHasPercent = PR_TRUE;
SetCalcValue(&calc, item->mYValue);
}
}
aComputedValue.SetAndAdoptCSSValuePairListValue(result.forget());
break;
}
case eCSSProperty_background_size: {
const nsStyleBackground *bg =
static_cast<const nsStyleBackground*>(styleStruct);
nsAutoPtr<nsCSSValuePairList> result;
nsCSSValuePairList **resultTail = getter_Transfers(result);
NS_ABORT_IF_FALSE(bg->mSizeCount > 0, "unexpected count");
for (PRUint32 i = 0, i_end = bg->mSizeCount; i != i_end; ++i) {
nsCSSValuePairList *item = new nsCSSValuePairList;
*resultTail = item;
resultTail = &item->mNext;
const nsStyleBackground::Size &size = bg->mLayers[i].mSize;
switch (size.mWidthType) {
case nsStyleBackground::Size::eContain:
case nsStyleBackground::Size::eCover:
item->mXValue.SetIntValue(size.mWidthType,
eCSSUnit_Enumerated);
break;
case nsStyleBackground::Size::eAuto:
item->mXValue.SetAutoValue();
break;
case nsStyleBackground::Size::eLengthPercentage:
if (size.mWidth.mLength == 0) {
item->mXValue.SetPercentValue(size.mWidth.mPercent);
} else if (size.mWidth.mPercent == 0.0f) {
nscoordToCSSValue(size.mWidth.mLength, item->mXValue);
} else {
nsStyleCoord::Calc calc;
calc.mLength = size.mWidth.mLength;
calc.mPercent = size.mWidth.mPercent;
calc.mHasPercent = PR_TRUE;
SetCalcValue(&calc, item->mXValue);
}
break;
}
switch (size.mHeightType) {
case nsStyleBackground::Size::eContain:
case nsStyleBackground::Size::eCover:
// leave it null
break;
case nsStyleBackground::Size::eAuto:
item->mYValue.SetAutoValue();
break;
case nsStyleBackground::Size::eLengthPercentage:
if (size.mHeight.mLength == 0) {
item->mYValue.SetPercentValue(size.mHeight.mPercent);
} else if (size.mHeight.mPercent == 0.0f) {
nscoordToCSSValue(size.mHeight.mLength, item->mYValue);
} else {
nsStyleCoord::Calc calc;
calc.mLength = size.mHeight.mLength;
calc.mPercent = size.mHeight.mPercent;
calc.mHasPercent = PR_TRUE;
SetCalcValue(&calc, item->mYValue);
}
break;
}
}
aComputedValue.SetAndAdoptCSSValuePairListValue(result.forget());
break;
}
case eCSSProperty__moz_transform: {
const nsStyleDisplay *display =
static_cast<const nsStyleDisplay*>(styleStruct);
nsAutoPtr<nsCSSValueList> result;
if (display->mSpecifiedTransform) {
// Clone, and convert all lengths (not percents) to pixels.
nsCSSValueList **resultTail = getter_Transfers(result);
for (const nsCSSValueList *l = display->mSpecifiedTransform;
l; l = l->mNext) {
nsCSSValueList *clone = new nsCSSValueList;
*resultTail = clone;
resultTail = &clone->mNext;
SubstitutePixelValues(aStyleContext, l->mValue, clone->mValue);
}
} else {
result = new nsCSSValueList();
result->mValue.SetNoneValue();
}
aComputedValue.SetAndAdoptCSSValueListValue(result.forget(),
eUnit_Transform);
break;
}
default:
NS_ABORT_IF_FALSE(PR_FALSE, "missing property implementation");
return PR_FALSE;
};
return PR_TRUE;
case eStyleAnimType_Coord:
return StyleCoordToValue(*static_cast<const nsStyleCoord*>(
StyleDataAtOffset(styleStruct, ssOffset)), aComputedValue);
case eStyleAnimType_Sides_Top:
case eStyleAnimType_Sides_Right:
case eStyleAnimType_Sides_Bottom:
case eStyleAnimType_Sides_Left: {
PR_STATIC_ASSERT(0 == NS_SIDE_TOP);
PR_STATIC_ASSERT(eStyleAnimType_Sides_Right - eStyleAnimType_Sides_Top
== NS_SIDE_RIGHT);
PR_STATIC_ASSERT(eStyleAnimType_Sides_Bottom - eStyleAnimType_Sides_Top
== NS_SIDE_BOTTOM);
PR_STATIC_ASSERT(eStyleAnimType_Sides_Left - eStyleAnimType_Sides_Top
== NS_SIDE_LEFT);
const nsStyleCoord &coord = static_cast<const nsStyleSides*>(
StyleDataAtOffset(styleStruct, ssOffset))->
Get(mozilla::css::Side(animType - eStyleAnimType_Sides_Top));
return StyleCoordToValue(coord, aComputedValue);
}
case eStyleAnimType_Corner_TopLeft:
case eStyleAnimType_Corner_TopRight:
case eStyleAnimType_Corner_BottomRight:
case eStyleAnimType_Corner_BottomLeft: {
PR_STATIC_ASSERT(0 == NS_CORNER_TOP_LEFT);
PR_STATIC_ASSERT(eStyleAnimType_Corner_TopRight -
eStyleAnimType_Corner_TopLeft
== NS_CORNER_TOP_RIGHT);
PR_STATIC_ASSERT(eStyleAnimType_Corner_BottomRight -
eStyleAnimType_Corner_TopLeft
== NS_CORNER_BOTTOM_RIGHT);
PR_STATIC_ASSERT(eStyleAnimType_Corner_BottomLeft -
eStyleAnimType_Corner_TopLeft
== NS_CORNER_BOTTOM_LEFT);
const nsStyleCorners *corners = static_cast<const nsStyleCorners*>(
StyleDataAtOffset(styleStruct, ssOffset));
PRUint8 fullCorner = animType - eStyleAnimType_Corner_TopLeft;
const nsStyleCoord &horiz =
corners->Get(NS_FULL_TO_HALF_CORNER(fullCorner, PR_FALSE));
const nsStyleCoord &vert =
corners->Get(NS_FULL_TO_HALF_CORNER(fullCorner, PR_TRUE));
nsAutoPtr<nsCSSValuePair> pair(new nsCSSValuePair);
if (!pair ||
!StyleCoordToCSSValue(horiz, pair->mXValue) ||
!StyleCoordToCSSValue(vert, pair->mYValue)) {
return PR_FALSE;
}
aComputedValue.SetAndAdoptCSSValuePairValue(pair.forget(),
eUnit_CSSValuePair);
return PR_TRUE;
}
case eStyleAnimType_nscoord:
aComputedValue.SetCoordValue(*static_cast<const nscoord*>(
StyleDataAtOffset(styleStruct, ssOffset)));
return PR_TRUE;
case eStyleAnimType_EnumU8:
aComputedValue.SetIntValue(*static_cast<const PRUint8*>(
StyleDataAtOffset(styleStruct, ssOffset)), eUnit_Enumerated);
return PR_TRUE;
case eStyleAnimType_float:
aComputedValue.SetFloatValue(*static_cast<const float*>(
StyleDataAtOffset(styleStruct, ssOffset)));
if (aProperty == eCSSProperty_font_size_adjust &&
aComputedValue.GetFloatValue() == 0.0f) {
// In nsStyleFont, we set mFont.sizeAdjust to 0 to represent
// font-size-adjust: none. Here, we have to treat this as a keyword
// instead of a float value, to make sure we don't end up doing
// interpolation with it.
aComputedValue.SetNoneValue();
}
return PR_TRUE;
case eStyleAnimType_Color:
aComputedValue.SetColorValue(*static_cast<const nscolor*>(
StyleDataAtOffset(styleStruct, ssOffset)));
return PR_TRUE;
case eStyleAnimType_PaintServer: {
const nsStyleSVGPaint &paint = *static_cast<const nsStyleSVGPaint*>(
StyleDataAtOffset(styleStruct, ssOffset));
if (paint.mType == eStyleSVGPaintType_Color) {
aComputedValue.SetColorValue(paint.mPaint.mColor);
return PR_TRUE;
}
if (paint.mType == eStyleSVGPaintType_Server) {
if (!paint.mPaint.mPaintServer) {
NS_WARNING("Null paint server");
return PR_FALSE;
}
nsAutoPtr<nsCSSValuePair> pair(new nsCSSValuePair);
nsRefPtr<nsStringBuffer> uriAsStringBuffer =
GetURIAsUtf16StringBuffer(paint.mPaint.mPaintServer);
NS_ENSURE_TRUE(!!uriAsStringBuffer, PR_FALSE);
nsIDocument* doc = aStyleContext->PresContext()->Document();
nsRefPtr<nsCSSValue::URL> url =
new nsCSSValue::URL(paint.mPaint.mPaintServer,
uriAsStringBuffer,
doc->GetDocumentURI(),
doc->NodePrincipal());
pair->mXValue.SetURLValue(url);
pair->mYValue.SetColorValue(paint.mFallbackColor);
aComputedValue.SetAndAdoptCSSValuePairValue(pair.forget(),
eUnit_CSSValuePair);
return PR_TRUE;
}
NS_ABORT_IF_FALSE(paint.mType == eStyleSVGPaintType_None,
"Unexpected SVG paint type");
aComputedValue.SetNoneValue();
return PR_TRUE;
}
case eStyleAnimType_Shadow: {
const nsCSSShadowArray *shadowArray =
*static_cast<const nsRefPtr<nsCSSShadowArray>*>(
StyleDataAtOffset(styleStruct, ssOffset));
if (!shadowArray) {
aComputedValue.SetAndAdoptCSSValueListValue(nsnull, eUnit_Shadow);
return PR_TRUE;
}
nsAutoPtr<nsCSSValueList> result;
nsCSSValueList **resultTail = getter_Transfers(result);
for (PRUint32 i = 0, i_end = shadowArray->Length(); i < i_end; ++i) {
const nsCSSShadowItem *shadow = shadowArray->ShadowAt(i);
// X, Y, Radius, Spread, Color, Inset
nsRefPtr<nsCSSValue::Array> arr = nsCSSValue::Array::Create(6);
nscoordToCSSValue(shadow->mXOffset, arr->Item(0));
nscoordToCSSValue(shadow->mYOffset, arr->Item(1));
nscoordToCSSValue(shadow->mRadius, arr->Item(2));
// NOTE: This code sometimes stores mSpread: 0 even when
// the parser would be required to leave it null.
nscoordToCSSValue(shadow->mSpread, arr->Item(3));
if (shadow->mHasColor) {
arr->Item(4).SetColorValue(shadow->mColor);
}
if (shadow->mInset) {
arr->Item(5).SetIntValue(NS_STYLE_BOX_SHADOW_INSET,
eCSSUnit_Enumerated);
}
nsCSSValueList *resultItem = new nsCSSValueList;
if (!resultItem) {
return PR_FALSE;
}
resultItem->mValue.SetArrayValue(arr, eCSSUnit_Array);
*resultTail = resultItem;
resultTail = &resultItem->mNext;
}
aComputedValue.SetAndAdoptCSSValueListValue(result.forget(),
eUnit_Shadow);
return PR_TRUE;
}
case eStyleAnimType_None:
NS_NOTREACHED("shouldn't use on non-animatable properties");
}
return PR_FALSE;
}
nsStyleAnimation::Value::Value(PRInt32 aInt, Unit aUnit,
IntegerConstructorType)
{
NS_ASSERTION(IsIntUnit(aUnit), "unit must be of integer type");
mUnit = aUnit;
mValue.mInt = aInt;
}
nsStyleAnimation::Value::Value(nscoord aLength, CoordConstructorType)
{
mUnit = eUnit_Coord;
mValue.mCoord = aLength;
}
nsStyleAnimation::Value::Value(float aPercent, PercentConstructorType)
{
mUnit = eUnit_Percent;
mValue.mFloat = aPercent;
}
nsStyleAnimation::Value::Value(float aFloat, FloatConstructorType)
{
mUnit = eUnit_Float;
mValue.mFloat = aFloat;
}
nsStyleAnimation::Value::Value(nscolor aColor, ColorConstructorType)
{
mUnit = eUnit_Color;
mValue.mColor = aColor;
}
nsStyleAnimation::Value&
nsStyleAnimation::Value::operator=(const Value& aOther)
{
FreeValue();
mUnit = aOther.mUnit;
switch (mUnit) {
case eUnit_Null:
case eUnit_Normal:
case eUnit_Auto:
case eUnit_None:
break;
case eUnit_Enumerated:
case eUnit_Visibility:
case eUnit_Integer:
mValue.mInt = aOther.mValue.mInt;
break;
case eUnit_Coord:
mValue.mCoord = aOther.mValue.mCoord;
break;
case eUnit_Percent:
case eUnit_Float:
mValue.mFloat = aOther.mValue.mFloat;
break;
case eUnit_Color:
mValue.mColor = aOther.mValue.mColor;
break;
case eUnit_Calc:
NS_ABORT_IF_FALSE(aOther.mValue.mCSSValue, "values may not be null");
mValue.mCSSValue = new nsCSSValue(*aOther.mValue.mCSSValue);
if (!mValue.mCSSValue) {
mUnit = eUnit_Null;
}
break;
case eUnit_CSSValuePair:
NS_ABORT_IF_FALSE(aOther.mValue.mCSSValuePair,
"value pairs may not be null");
mValue.mCSSValuePair = new nsCSSValuePair(*aOther.mValue.mCSSValuePair);
if (!mValue.mCSSValuePair) {
mUnit = eUnit_Null;
}
break;
case eUnit_CSSRect:
NS_ABORT_IF_FALSE(aOther.mValue.mCSSRect, "rects may not be null");
mValue.mCSSRect = new nsCSSRect(*aOther.mValue.mCSSRect);
if (!mValue.mCSSRect) {
mUnit = eUnit_Null;
}
break;
case eUnit_Dasharray:
case eUnit_Shadow:
case eUnit_Transform:
NS_ABORT_IF_FALSE(mUnit == eUnit_Shadow || aOther.mValue.mCSSValueList,
"value lists other than shadows may not be null");
if (aOther.mValue.mCSSValueList) {
mValue.mCSSValueList = aOther.mValue.mCSSValueList->Clone();
if (!mValue.mCSSValueList) {
mUnit = eUnit_Null;
}
} else {
mValue.mCSSValueList = nsnull;
}
break;
case eUnit_CSSValuePairList:
NS_ABORT_IF_FALSE(aOther.mValue.mCSSValuePairList,
"value pair lists may not be null");
mValue.mCSSValuePairList = aOther.mValue.mCSSValuePairList->Clone();
if (!mValue.mCSSValuePairList) {
mUnit = eUnit_Null;
}
break;
case eUnit_UnparsedString:
NS_ABORT_IF_FALSE(aOther.mValue.mString, "expecting non-null string");
mValue.mString = aOther.mValue.mString;
mValue.mString->AddRef();
break;
}
return *this;
}
void
nsStyleAnimation::Value::SetNormalValue()
{
FreeValue();
mUnit = eUnit_Normal;
}
void
nsStyleAnimation::Value::SetAutoValue()
{
FreeValue();
mUnit = eUnit_Auto;
}
void
nsStyleAnimation::Value::SetNoneValue()
{
FreeValue();
mUnit = eUnit_None;
}
void
nsStyleAnimation::Value::SetIntValue(PRInt32 aInt, Unit aUnit)
{
NS_ASSERTION(IsIntUnit(aUnit), "unit must be of integer type");
FreeValue();
mUnit = aUnit;
mValue.mInt = aInt;
}
void
nsStyleAnimation::Value::SetCoordValue(nscoord aLength)
{
FreeValue();
mUnit = eUnit_Coord;
mValue.mCoord = aLength;
}
void
nsStyleAnimation::Value::SetPercentValue(float aPercent)
{
FreeValue();
mUnit = eUnit_Percent;
mValue.mFloat = aPercent;
}
void
nsStyleAnimation::Value::SetFloatValue(float aFloat)
{
FreeValue();
mUnit = eUnit_Float;
mValue.mFloat = aFloat;
}
void
nsStyleAnimation::Value::SetColorValue(nscolor aColor)
{
FreeValue();
mUnit = eUnit_Color;
mValue.mColor = aColor;
}
void
nsStyleAnimation::Value::SetUnparsedStringValue(const nsString& aString)
{
FreeValue();
mUnit = eUnit_UnparsedString;
mValue.mString = nsCSSValue::BufferFromString(aString).get();
if (NS_UNLIKELY(!mValue.mString)) {
// not much we can do here; just make sure that our promise of a
// non-null mValue.mString holds for string units.
mUnit = eUnit_Null;
}
}
void
nsStyleAnimation::Value::SetAndAdoptCSSValueValue(nsCSSValue *aValue,
Unit aUnit)
{
FreeValue();
NS_ABORT_IF_FALSE(IsCSSValueUnit(aUnit), "bad unit");
NS_ABORT_IF_FALSE(aValue != nsnull, "values may not be null");
mUnit = aUnit;
mValue.mCSSValue = aValue; // take ownership
}
void
nsStyleAnimation::Value::SetAndAdoptCSSValuePairValue(
nsCSSValuePair *aValuePair, Unit aUnit)
{
FreeValue();
NS_ABORT_IF_FALSE(IsCSSValuePairUnit(aUnit), "bad unit");
NS_ABORT_IF_FALSE(aValuePair != nsnull, "value pairs may not be null");
mUnit = aUnit;
mValue.mCSSValuePair = aValuePair; // take ownership
}
void
nsStyleAnimation::Value::SetAndAdoptCSSRectValue(nsCSSRect *aRect, Unit aUnit)
{
FreeValue();
NS_ABORT_IF_FALSE(IsCSSRectUnit(aUnit), "bad unit");
NS_ABORT_IF_FALSE(aRect != nsnull, "value pairs may not be null");
mUnit = aUnit;
mValue.mCSSRect = aRect; // take ownership
}
void
nsStyleAnimation::Value::SetAndAdoptCSSValueListValue(
nsCSSValueList *aValueList, Unit aUnit)
{
FreeValue();
NS_ABORT_IF_FALSE(IsCSSValueListUnit(aUnit), "bad unit");
NS_ABORT_IF_FALSE(aUnit != eUnit_Dasharray || aValueList != nsnull,
"dasharrays may not be null");
mUnit = aUnit;
mValue.mCSSValueList = aValueList; // take ownership
}
void
nsStyleAnimation::Value::SetAndAdoptCSSValuePairListValue(
nsCSSValuePairList *aValuePairList)
{
FreeValue();
NS_ABORT_IF_FALSE(aValuePairList, "may not be null");
mUnit = eUnit_CSSValuePairList;
mValue.mCSSValuePairList = aValuePairList; // take ownership
}
void
nsStyleAnimation::Value::FreeValue()
{
if (IsCSSValueUnit(mUnit)) {
delete mValue.mCSSValue;
} else if (IsCSSValueListUnit(mUnit)) {
delete mValue.mCSSValueList;
} else if (IsCSSValuePairUnit(mUnit)) {
delete mValue.mCSSValuePair;
} else if (IsCSSRectUnit(mUnit)) {
delete mValue.mCSSRect;
} else if (IsCSSValuePairListUnit(mUnit)) {
delete mValue.mCSSValuePairList;
} else if (IsStringUnit(mUnit)) {
NS_ABORT_IF_FALSE(mValue.mString, "expecting non-null string");
mValue.mString->Release();
}
}
PRBool
nsStyleAnimation::Value::operator==(const Value& aOther) const
{
if (mUnit != aOther.mUnit) {
return PR_FALSE;
}
switch (mUnit) {
case eUnit_Null:
case eUnit_Normal:
case eUnit_Auto:
case eUnit_None:
return PR_TRUE;
case eUnit_Enumerated:
case eUnit_Visibility:
case eUnit_Integer:
return mValue.mInt == aOther.mValue.mInt;
case eUnit_Coord:
return mValue.mCoord == aOther.mValue.mCoord;
case eUnit_Percent:
case eUnit_Float:
return mValue.mFloat == aOther.mValue.mFloat;
case eUnit_Color:
return mValue.mColor == aOther.mValue.mColor;
case eUnit_Calc:
return *mValue.mCSSValue == *aOther.mValue.mCSSValue;
case eUnit_CSSValuePair:
return *mValue.mCSSValuePair == *aOther.mValue.mCSSValuePair;
case eUnit_CSSRect:
return *mValue.mCSSRect == *aOther.mValue.mCSSRect;
case eUnit_Dasharray:
case eUnit_Shadow:
case eUnit_Transform:
return *mValue.mCSSValueList == *aOther.mValue.mCSSValueList;
case eUnit_CSSValuePairList:
return *mValue.mCSSValuePairList == *aOther.mValue.mCSSValuePairList;
case eUnit_UnparsedString:
return (NS_strcmp(GetStringBufferValue(),
aOther.GetStringBufferValue()) == 0);
}
NS_NOTREACHED("incomplete case");
return PR_FALSE;
}
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