Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 299 insertions, 0 deletions

diff --git a/dom/svg/SVGAnimatedViewBox.cpp b/dom/svg/SVGAnimatedViewBox.cpp
new file mode 100644
index 0000000000..aa5d079909
--- /dev/null
+++ b/dom/svg/SVGAnimatedViewBox.cpp
@@ -0,0 +1,299 @@
+/* -*- 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