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-rw-r--r--dom/svg/SVGAnimatedViewBox.cpp299
1 files changed, 299 insertions, 0 deletions
diff --git a/dom/svg/SVGAnimatedViewBox.cpp b/dom/svg/SVGAnimatedViewBox.cpp
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+++ b/dom/svg/SVGAnimatedViewBox.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "SVGAnimatedViewBox.h"
+
+#include "mozAutoDocUpdate.h"
+#include "mozilla/Maybe.h"
+#include <utility>
+
+#include "SVGViewBoxSMILType.h"
+#include "mozilla/SMILValue.h"
+#include "mozilla/SVGContentUtils.h"
+#include "mozilla/dom/SVGRect.h"
+#include "nsCharSeparatedTokenizer.h"
+#include "nsTextFormatter.h"
+
+using namespace mozilla::dom;
+
+namespace mozilla {
+
+#define NUM_VIEWBOX_COMPONENTS 4
+
+/* Implementation of SVGViewBox methods */
+
+bool SVGViewBox::operator==(const SVGViewBox& aOther) const {
+ if (&aOther == this) return true;
+
+ return (none && aOther.none) ||
+ (!none && !aOther.none && x == aOther.x && y == aOther.y &&
+ width == aOther.width && height == aOther.height);
+}
+
+/* static */
+nsresult SVGViewBox::FromString(const nsAString& aStr, SVGViewBox* aViewBox) {
+ if (aStr.EqualsLiteral("none")) {
+ aViewBox->none = true;
+ return NS_OK;
+ }
+
+ nsCharSeparatedTokenizerTemplate<nsContentUtils::IsHTMLWhitespace,
+ nsTokenizerFlags::SeparatorOptional>
+ tokenizer(aStr, ',');
+ float vals[NUM_VIEWBOX_COMPONENTS];
+ uint32_t i;
+ for (i = 0; i < NUM_VIEWBOX_COMPONENTS && tokenizer.hasMoreTokens(); ++i) {
+ if (!SVGContentUtils::ParseNumber(tokenizer.nextToken(), vals[i])) {
+ return NS_ERROR_DOM_SYNTAX_ERR;
+ }
+ }
+
+ if (i != NUM_VIEWBOX_COMPONENTS || // Too few values.
+ tokenizer.hasMoreTokens() || // Too many values.
+ tokenizer.separatorAfterCurrentToken()) { // Trailing comma.
+ return NS_ERROR_DOM_SYNTAX_ERR;
+ }
+
+ aViewBox->x = vals[0];
+ aViewBox->y = vals[1];
+ aViewBox->width = vals[2];
+ aViewBox->height = vals[3];
+ aViewBox->none = false;
+
+ return NS_OK;
+}
+
+static SVGAttrTearoffTable<SVGAnimatedViewBox, SVGRect>
+ sBaseSVGViewBoxTearoffTable;
+static SVGAttrTearoffTable<SVGAnimatedViewBox, SVGRect>
+ sAnimSVGViewBoxTearoffTable;
+SVGAttrTearoffTable<SVGAnimatedViewBox, SVGAnimatedRect>
+ SVGAnimatedViewBox::sSVGAnimatedRectTearoffTable;
+
+//----------------------------------------------------------------------
+// Helper class: AutoChangeViewBoxNotifier
+// Stack-based helper class to pair calls to WillChangeViewBox and
+// DidChangeViewBox.
+class MOZ_RAII AutoChangeViewBoxNotifier {
+ public:
+ AutoChangeViewBoxNotifier(SVGAnimatedViewBox* aViewBox,
+ SVGElement* aSVGElement, bool aDoSetAttr = true)
+ : mViewBox(aViewBox), mSVGElement(aSVGElement), mDoSetAttr(aDoSetAttr) {
+ MOZ_ASSERT(mViewBox, "Expecting non-null viewBox");
+ MOZ_ASSERT(mSVGElement, "Expecting non-null element");
+
+ if (mDoSetAttr) {
+ mUpdateBatch.emplace(aSVGElement->GetComposedDoc(), true);
+ mEmptyOrOldValue = mSVGElement->WillChangeViewBox(mUpdateBatch.ref());
+ }
+ }
+
+ ~AutoChangeViewBoxNotifier() {
+ if (mDoSetAttr) {
+ mSVGElement->DidChangeViewBox(mEmptyOrOldValue, mUpdateBatch.ref());
+ }
+ if (mViewBox->mAnimVal) {
+ mSVGElement->AnimationNeedsResample();
+ }
+ }
+
+ private:
+ SVGAnimatedViewBox* const mViewBox;
+ SVGElement* const mSVGElement;
+ Maybe<mozAutoDocUpdate> mUpdateBatch;
+ nsAttrValue mEmptyOrOldValue;
+ bool mDoSetAttr;
+};
+
+/* Implementation of SVGAnimatedViewBox methods */
+
+void SVGAnimatedViewBox::Init() {
+ mHasBaseVal = false;
+ // We shouldn't use mBaseVal for rendering (its usages should be guarded with
+ // "mHasBaseVal" checks), but just in case we do by accident, this will
+ // ensure that we treat it as "none" and ignore its numeric values:
+ mBaseVal.none = true;
+
+ mAnimVal = nullptr;
+}
+
+bool SVGAnimatedViewBox::HasRect() const {
+ // Check mAnimVal if we have one; otherwise, check mBaseVal if we have one;
+ // otherwise, just return false (we clearly do not have a rect).
+ const SVGViewBox* rect = mAnimVal.get();
+ if (!rect) {
+ if (!mHasBaseVal) {
+ // no anim val, no base val --> no viewbox rect
+ return false;
+ }
+ rect = &mBaseVal;
+ }
+
+ return !rect->none && rect->width >= 0 && rect->height >= 0;
+}
+
+void SVGAnimatedViewBox::SetAnimValue(const SVGViewBox& aRect,
+ SVGElement* aSVGElement) {
+ if (!mAnimVal) {
+ // it's okay if allocation fails - and no point in reporting that
+ mAnimVal = MakeUnique<SVGViewBox>(aRect);
+ } else {
+ if (aRect == *mAnimVal) {
+ return;
+ }
+ *mAnimVal = aRect;
+ }
+ aSVGElement->DidAnimateViewBox();
+}
+
+void SVGAnimatedViewBox::SetBaseValue(const SVGViewBox& aRect,
+ SVGElement* aSVGElement) {
+ if (!mHasBaseVal || mBaseVal == aRect) {
+ // This method is used to set a single x, y, width
+ // or height value. It can't create a base value
+ // as the other components may be undefined. We record
+ // the new value though, so as not to lose data.
+ mBaseVal = aRect;
+ return;
+ }
+
+ AutoChangeViewBoxNotifier notifier(this, aSVGElement);
+
+ mBaseVal = aRect;
+ mHasBaseVal = true;
+}
+
+nsresult SVGAnimatedViewBox::SetBaseValueString(const nsAString& aValue,
+ SVGElement* aSVGElement,
+ bool aDoSetAttr) {
+ SVGViewBox viewBox;
+
+ nsresult rv = SVGViewBox::FromString(aValue, &viewBox);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+ // Comparison against mBaseVal is only valid if we currently have a base val.
+ if (mHasBaseVal && viewBox == mBaseVal) {
+ return NS_OK;
+ }
+
+ AutoChangeViewBoxNotifier notifier(this, aSVGElement, aDoSetAttr);
+ mHasBaseVal = true;
+ mBaseVal = viewBox;
+
+ return NS_OK;
+}
+
+void SVGAnimatedViewBox::GetBaseValueString(nsAString& aValue) const {
+ if (mBaseVal.none) {
+ aValue.AssignLiteral("none");
+ return;
+ }
+ nsTextFormatter::ssprintf(aValue, u"%g %g %g %g", (double)mBaseVal.x,
+ (double)mBaseVal.y, (double)mBaseVal.width,
+ (double)mBaseVal.height);
+}
+
+already_AddRefed<SVGAnimatedRect> SVGAnimatedViewBox::ToSVGAnimatedRect(
+ SVGElement* aSVGElement) {
+ RefPtr<SVGAnimatedRect> domAnimatedRect =
+ sSVGAnimatedRectTearoffTable.GetTearoff(this);
+ if (!domAnimatedRect) {
+ domAnimatedRect = new SVGAnimatedRect(this, aSVGElement);
+ sSVGAnimatedRectTearoffTable.AddTearoff(this, domAnimatedRect);
+ }
+
+ return domAnimatedRect.forget();
+}
+
+already_AddRefed<SVGRect> SVGAnimatedViewBox::ToDOMBaseVal(
+ SVGElement* aSVGElement) {
+ if (!mHasBaseVal || mBaseVal.none) {
+ return nullptr;
+ }
+
+ RefPtr<SVGRect> domBaseVal = sBaseSVGViewBoxTearoffTable.GetTearoff(this);
+ if (!domBaseVal) {
+ domBaseVal = new SVGRect(this, aSVGElement, SVGRect::RectType::BaseValue);
+ sBaseSVGViewBoxTearoffTable.AddTearoff(this, domBaseVal);
+ }
+
+ return domBaseVal.forget();
+}
+
+SVGRect::~SVGRect() {
+ switch (mType) {
+ case RectType::BaseValue:
+ sBaseSVGViewBoxTearoffTable.RemoveTearoff(mVal);
+ break;
+ case RectType::AnimValue:
+ sAnimSVGViewBoxTearoffTable.RemoveTearoff(mVal);
+ break;
+ default:
+ break;
+ }
+}
+
+already_AddRefed<SVGRect> SVGAnimatedViewBox::ToDOMAnimVal(
+ SVGElement* aSVGElement) {
+ if ((mAnimVal && mAnimVal->none) ||
+ (!mAnimVal && (!mHasBaseVal || mBaseVal.none))) {
+ return nullptr;
+ }
+
+ RefPtr<SVGRect> domAnimVal = sAnimSVGViewBoxTearoffTable.GetTearoff(this);
+ if (!domAnimVal) {
+ domAnimVal = new SVGRect(this, aSVGElement, SVGRect::RectType::AnimValue);
+ sAnimSVGViewBoxTearoffTable.AddTearoff(this, domAnimVal);
+ }
+
+ return domAnimVal.forget();
+}
+
+UniquePtr<SMILAttr> SVGAnimatedViewBox::ToSMILAttr(SVGElement* aSVGElement) {
+ return MakeUnique<SMILViewBox>(this, aSVGElement);
+}
+
+nsresult SVGAnimatedViewBox::SMILViewBox ::ValueFromString(
+ const nsAString& aStr, const SVGAnimationElement* /*aSrcElement*/,
+ SMILValue& aValue, bool& aPreventCachingOfSandwich) const {
+ SVGViewBox viewBox;
+ nsresult res = SVGViewBox::FromString(aStr, &viewBox);
+ if (NS_FAILED(res)) {
+ return res;
+ }
+ SMILValue val(&SVGViewBoxSMILType::sSingleton);
+ *static_cast<SVGViewBox*>(val.mU.mPtr) = viewBox;
+ aValue = std::move(val);
+
+ return NS_OK;
+}
+
+SMILValue SVGAnimatedViewBox::SMILViewBox::GetBaseValue() const {
+ SMILValue val(&SVGViewBoxSMILType::sSingleton);
+ *static_cast<SVGViewBox*>(val.mU.mPtr) = mVal->mBaseVal;
+ return val;
+}
+
+void SVGAnimatedViewBox::SMILViewBox::ClearAnimValue() {
+ if (mVal->mAnimVal) {
+ mVal->mAnimVal = nullptr;
+ mSVGElement->DidAnimateViewBox();
+ }
+}
+
+nsresult SVGAnimatedViewBox::SMILViewBox::SetAnimValue(
+ const SMILValue& aValue) {
+ NS_ASSERTION(aValue.mType == &SVGViewBoxSMILType::sSingleton,
+ "Unexpected type to assign animated value");
+ if (aValue.mType == &SVGViewBoxSMILType::sSingleton) {
+ SVGViewBox& vb = *static_cast<SVGViewBox*>(aValue.mU.mPtr);
+ mVal->SetAnimValue(vb, mSVGElement);
+ }
+ return NS_OK;
+}
+
+} // namespace mozilla