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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /dom/svg/SVGTransformList.h
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
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-rw-r--r--dom/svg/SVGTransformList.h145
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diff --git a/dom/svg/SVGTransformList.h b/dom/svg/SVGTransformList.h
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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/. */
+
+#ifndef MOZILLA_SVGTRANSFORMLIST_H__
+#define MOZILLA_SVGTRANSFORMLIST_H__
+
+#include "gfxMatrix.h"
+#include "nsDebug.h"
+#include "nsTArray.h"
+#include "nsSVGTransform.h"
+
+namespace mozilla {
+
+namespace dom {
+class SVGTransform;
+} // namespace dom
+
+/**
+ * ATTENTION! WARNING! WATCH OUT!!
+ *
+ * Consumers that modify objects of this type absolutely MUST keep the DOM
+ * wrappers for those lists (if any) in sync!! That's why this class is so
+ * locked down.
+ *
+ * The DOM wrapper class for this class is DOMSVGTransformList.
+ */
+class SVGTransformList
+{
+ friend class nsSVGAnimatedTransformList;
+ friend class DOMSVGTransformList;
+ friend class dom::SVGTransform;
+
+public:
+ SVGTransformList() {}
+ ~SVGTransformList() {}
+
+ // Only methods that don't make/permit modification to this list are public.
+ // Only our friend classes can access methods that may change us.
+
+ /// This may return an incomplete string on OOM, but that's acceptable.
+ void GetValueAsString(nsAString& aValue) const;
+
+ bool IsEmpty() const {
+ return mItems.IsEmpty();
+ }
+
+ uint32_t Length() const {
+ return mItems.Length();
+ }
+
+ const nsSVGTransform& operator[](uint32_t aIndex) const {
+ return mItems[aIndex];
+ }
+
+ bool operator==(const SVGTransformList& rhs) const {
+ return mItems == rhs.mItems;
+ }
+
+ bool SetCapacity(uint32_t size) {
+ return mItems.SetCapacity(size, fallible);
+ }
+
+ void Compact() {
+ mItems.Compact();
+ }
+
+ gfxMatrix GetConsolidationMatrix() const;
+
+ // Access to methods that can modify objects of this type is deliberately
+ // limited. This is to reduce the chances of someone modifying objects of
+ // this type without taking the necessary steps to keep DOM wrappers in sync.
+ // If you need wider access to these methods, consider adding a method to
+ // SVGAnimatedTransformList and having that class act as an intermediary so it
+ // can take care of keeping DOM wrappers in sync.
+
+protected:
+
+ /**
+ * These may fail on OOM if the internal capacity needs to be increased, in
+ * which case the list will be left unmodified.
+ */
+ nsresult CopyFrom(const SVGTransformList& rhs);
+ nsresult CopyFrom(const nsTArray<nsSVGTransform>& aTransformArray);
+
+ nsSVGTransform& operator[](uint32_t aIndex) {
+ return mItems[aIndex];
+ }
+
+ /**
+ * This may fail (return false) on OOM if the internal capacity is being
+ * increased, in which case the list will be left unmodified.
+ */
+ bool SetLength(uint32_t aNumberOfItems) {
+ return mItems.SetLength(aNumberOfItems, fallible);
+ }
+
+private:
+
+ // Marking the following private only serves to show which methods are only
+ // used by our friend classes (as opposed to our subclasses) - it doesn't
+ // really provide additional safety.
+
+ nsresult SetValueFromString(const nsAString& aValue);
+
+ void Clear() {
+ mItems.Clear();
+ }
+
+ bool InsertItem(uint32_t aIndex, const nsSVGTransform& aTransform) {
+ if (aIndex >= mItems.Length()) {
+ aIndex = mItems.Length();
+ }
+ return !!mItems.InsertElementAt(aIndex, aTransform, fallible);
+ }
+
+ void ReplaceItem(uint32_t aIndex, const nsSVGTransform& aTransform) {
+ MOZ_ASSERT(aIndex < mItems.Length(),
+ "DOM wrapper caller should have raised INDEX_SIZE_ERR");
+ mItems[aIndex] = aTransform;
+ }
+
+ void RemoveItem(uint32_t aIndex) {
+ MOZ_ASSERT(aIndex < mItems.Length(),
+ "DOM wrapper caller should have raised INDEX_SIZE_ERR");
+ mItems.RemoveElementAt(aIndex);
+ }
+
+ bool AppendItem(const nsSVGTransform& aTransform) {
+ return !!mItems.AppendElement(aTransform, fallible);
+ }
+
+protected:
+ /*
+ * See SVGLengthList for the rationale for using FallibleTArray<nsSVGTransform>
+ * instead of FallibleTArray<nsSVGTransform, 1>.
+ */
+ FallibleTArray<nsSVGTransform> mItems;
+};
+
+} // namespace mozilla
+
+#endif // MOZILLA_SVGTRANSFORMLIST_H__