Adding upstream version 124.0.1.upstream/124.0.1

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

1 files changed, 203 insertions, 0 deletions

diff --git a/dom/svg/SVGNumberListSMILType.cpp b/dom/svg/SVGNumberListSMILType.cpp
new file mode 100644
index 0000000000..3fc4e35f9b
--- /dev/null
+++ b/dom/svg/SVGNumberListSMILType.cpp
@@ -0,0 +1,203 @@
+/* -*- 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 "SVGNumberListSMILType.h"
+
+#include "mozilla/FloatingPoint.h"
+#include "mozilla/SMILValue.h"
+#include "nsMathUtils.h"
+#include "SVGNumberList.h"
+#include <math.h>
+
+/* The "identity" number list for a given number list attribute (the effective
+ * number list that is used if an attribute value is not specified) varies
+ * widely for different number list attributes, and can depend on the value of
+ * other attributes on the same element:
+ *
+ * http://www.w3.org/TR/SVG11/filters.html#feColorMatrixValuesAttribute
+ *
+ http://www.w3.org/TR/SVG11/filters.html#feComponentTransferTableValuesAttribute
+ *
+ http://www.w3.org/TR/SVG11/filters.html#feConvolveMatrixElementKernelMatrixAttribute
+ * http://www.w3.org/TR/SVG11/text.html#TextElementRotateAttribute
+ *
+ * Note that we don't need to worry about that variation here, however. The way
+ * that the SMIL engine creates and composites sandwich layers together allows
+ * us to treat "identity" SMILValue objects as a number list of zeros. Such
+ * identity SMILValues are identified by the fact that their
+ # SVGNumberListAndInfo has not been given an element yet.
+ */
+
+namespace mozilla {
+
+/*static*/
+SVGNumberListSMILType SVGNumberListSMILType::sSingleton;
+
+//----------------------------------------------------------------------
+// nsISMILType implementation
+
+void SVGNumberListSMILType::Init(SMILValue& aValue) const {
+  MOZ_ASSERT(aValue.IsNull(), "Unexpected value type");
+
+  aValue.mU.mPtr = new SVGNumberListAndInfo();
+  aValue.mType = this;
+}
+
+void SVGNumberListSMILType::Destroy(SMILValue& aValue) const {
+  MOZ_ASSERT(aValue.mType == this, "Unexpected SMIL value type");
+  delete static_cast<SVGNumberListAndInfo*>(aValue.mU.mPtr);
+  aValue.mU.mPtr = nullptr;
+  aValue.mType = SMILNullType::Singleton();
+}
+
+nsresult SVGNumberListSMILType::Assign(SMILValue& aDest,
+                                       const SMILValue& aSrc) const {
+  MOZ_ASSERT(aDest.mType == aSrc.mType, "Incompatible SMIL types");
+  MOZ_ASSERT(aDest.mType == this, "Unexpected SMIL value");
+
+  const SVGNumberListAndInfo* src =
+      static_cast<const SVGNumberListAndInfo*>(aSrc.mU.mPtr);
+  SVGNumberListAndInfo* dest =
+      static_cast<SVGNumberListAndInfo*>(aDest.mU.mPtr);
+
+  return dest->CopyFrom(*src);
+}
+
+bool SVGNumberListSMILType::IsEqual(const SMILValue& aLeft,
+                                    const SMILValue& aRight) const {
+  MOZ_ASSERT(aLeft.mType == aRight.mType, "Incompatible SMIL types");
+  MOZ_ASSERT(aLeft.mType == this, "Unexpected type for SMIL value");
+
+  return *static_cast<const SVGNumberListAndInfo*>(aLeft.mU.mPtr) ==
+         *static_cast<const SVGNumberListAndInfo*>(aRight.mU.mPtr);
+}
+
+nsresult SVGNumberListSMILType::Add(SMILValue& aDest,
+                                    const SMILValue& aValueToAdd,
+                                    uint32_t aCount) const {
+  MOZ_ASSERT(aDest.mType == this, "Unexpected SMIL type");
+  MOZ_ASSERT(aValueToAdd.mType == this, "Incompatible SMIL type");
+
+  SVGNumberListAndInfo& dest =
+      *static_cast<SVGNumberListAndInfo*>(aDest.mU.mPtr);
+  const SVGNumberListAndInfo& valueToAdd =
+      *static_cast<const SVGNumberListAndInfo*>(aValueToAdd.mU.mPtr);
+
+  MOZ_ASSERT(dest.Element() || valueToAdd.Element(),
+             "Target element propagation failure");
+
+  if (!valueToAdd.Element()) {
+    MOZ_ASSERT(valueToAdd.Length() == 0,
+               "Not identity value - target element propagation failure");
+    return NS_OK;
+  }
+  if (!dest.Element()) {
+    MOZ_ASSERT(dest.Length() == 0,
+               "Not identity value - target element propagation failure");
+    if (!dest.SetLength(valueToAdd.Length())) {
+      return NS_ERROR_OUT_OF_MEMORY;
+    }
+    for (uint32_t i = 0; i < dest.Length(); ++i) {
+      dest[i] = aCount * valueToAdd[i];
+    }
+    dest.SetInfo(valueToAdd.Element());  // propagate target element info!
+    return NS_OK;
+  }
+  MOZ_ASSERT(dest.Element() == valueToAdd.Element(),
+             "adding values from different elements...?");
+  if (dest.Length() != valueToAdd.Length()) {
+    // For now we only support animation between lists with the same number of
+    // items. SVGContentUtils::ReportToConsole
+    return NS_ERROR_FAILURE;
+  }
+  for (uint32_t i = 0; i < dest.Length(); ++i) {
+    dest[i] += aCount * valueToAdd[i];
+  }
+  dest.SetInfo(valueToAdd.Element());  // propagate target element info!
+  return NS_OK;
+}
+
+nsresult SVGNumberListSMILType::ComputeDistance(const SMILValue& aFrom,
+                                                const SMILValue& aTo,
+                                                double& aDistance) const {
+  MOZ_ASSERT(aFrom.mType == this, "Unexpected SMIL type");
+  MOZ_ASSERT(aTo.mType == this, "Incompatible SMIL type");
+
+  const SVGNumberListAndInfo& from =
+      *static_cast<const SVGNumberListAndInfo*>(aFrom.mU.mPtr);
+  const SVGNumberListAndInfo& to =
+      *static_cast<const SVGNumberListAndInfo*>(aTo.mU.mPtr);
+
+  if (from.Length() != to.Length()) {
+    // Lists in the 'values' attribute must have the same length.
+    // SVGContentUtils::ReportToConsole
+    return NS_ERROR_FAILURE;
+  }
+
+  // We return the root of the sum of the squares of the delta between the
+  // numbers at each correspanding index.
+
+  double total = 0.0;
+
+  for (uint32_t i = 0; i < to.Length(); ++i) {
+    double delta = to[i] - from[i];
+    total += delta * delta;
+  }
+  double distance = sqrt(total);
+  if (!std::isfinite(distance)) {
+    return NS_ERROR_FAILURE;
+  }
+  aDistance = distance;
+
+  return NS_OK;
+}
+
+nsresult SVGNumberListSMILType::Interpolate(const SMILValue& aStartVal,
+                                            const SMILValue& aEndVal,
+                                            double aUnitDistance,
+                                            SMILValue& aResult) const {
+  MOZ_ASSERT(aStartVal.mType == aEndVal.mType,
+             "Trying to interpolate different types");
+  MOZ_ASSERT(aStartVal.mType == this, "Unexpected types for interpolation");
+  MOZ_ASSERT(aResult.mType == this, "Unexpected result type");
+
+  const SVGNumberListAndInfo& start =
+      *static_cast<const SVGNumberListAndInfo*>(aStartVal.mU.mPtr);
+  const SVGNumberListAndInfo& end =
+      *static_cast<const SVGNumberListAndInfo*>(aEndVal.mU.mPtr);
+  SVGNumberListAndInfo& result =
+      *static_cast<SVGNumberListAndInfo*>(aResult.mU.mPtr);
+
+  MOZ_ASSERT(end.Element(), "Can't propagate target element");
+  MOZ_ASSERT(start.Element() == end.Element() || !start.Element(),
+             "Different target elements");
+
+  if (start.Element() &&  // 'start' is not an "identity" value
+      start.Length() != end.Length()) {
+    // For now we only support animation between lists of the same length.
+    // SVGContentUtils::ReportToConsole
+    return NS_ERROR_FAILURE;
+  }
+  if (!result.SetLength(end.Length())) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  result.SetInfo(end.Element());  // propagate target element info!
+
+  if (start.Length() != end.Length()) {
+    MOZ_ASSERT(start.Length() == 0, "Not an identity value");
+    for (uint32_t i = 0; i < end.Length(); ++i) {
+      result[i] = aUnitDistance * end[i];
+    }
+    return NS_OK;
+  }
+  for (uint32_t i = 0; i < end.Length(); ++i) {
+    result[i] = start[i] + (end[i] - start[i]) * aUnitDistance;
+  }
+  return NS_OK;
+}
+
+}  // namespace mozilla