1 files changed, 103 insertions, 0 deletions
diff --git a/dom/svg/SVGPointList.cpp b/dom/svg/SVGPointList.cpp
new file mode 100644
index 000000000..c41a109c2
--- /dev/null
+++ b/dom/svg/SVGPointList.cpp
@@ -0,0 +1,103 @@
+/* -*- 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 "mozilla/ArrayUtils.h"
+
+#include "SVGPointList.h"
+#include "nsCharSeparatedTokenizer.h"
+#include "nsTextFormatter.h"
+#include "SVGContentUtils.h"
+
+namespace mozilla {
+
+nsresult
+SVGPointList::CopyFrom(const SVGPointList& rhs)
+{
+  if (!mItems.Assign(rhs.mItems, fallible)) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+  return NS_OK;
+}
+
+void
+SVGPointList::GetValueAsString(nsAString& aValue) const
+{
+  aValue.Truncate();
+  char16_t buf[50];
+  uint32_t last = mItems.Length() - 1;
+  for (uint32_t i = 0; i < mItems.Length(); ++i) {
+    // Would like to use aValue.AppendPrintf("%f,%f", item.mX, item.mY),
+    // but it's not possible to always avoid trailing zeros.
+    nsTextFormatter::snprintf(buf, ArrayLength(buf),
+                              u"%g,%g",
+                              double(mItems[i].mX), double(mItems[i].mY));
+    // We ignore OOM, since it's not useful for us to return an error.
+    aValue.Append(buf);
+    if (i != last) {
+      aValue.Append(' ');
+    }
+  }
+}
+
+nsresult
+SVGPointList::SetValueFromString(const nsAString& aValue)
+{
+  // The spec says that the list is parsed and accepted up to the first error
+  // encountered, so we must call CopyFrom even if an error occurs. We still
+  // want to throw any error code from setAttribute if there's a problem
+  // though, so we must take care to return any error code.
+
+  nsresult rv = NS_OK;
+
+  SVGPointList temp;
+
+  nsCharSeparatedTokenizerTemplate<IsSVGWhitespace>
+    tokenizer(aValue, ',', nsCharSeparatedTokenizer::SEPARATOR_OPTIONAL);
+
+  while (tokenizer.hasMoreTokens()) {
+
+    const nsAString& token = tokenizer.nextToken();
+
+    RangedPtr<const char16_t> iter =
+      SVGContentUtils::GetStartRangedPtr(token);
+    const RangedPtr<const char16_t> end =
+      SVGContentUtils::GetEndRangedPtr(token);
+
+    float x;
+    if (!SVGContentUtils::ParseNumber(iter, end, x)) {
+      rv = NS_ERROR_DOM_SYNTAX_ERR;
+      break;
+    }
+
+    float y;
+    if (iter == end) {
+      if (!tokenizer.hasMoreTokens() ||
+          !SVGContentUtils::ParseNumber(tokenizer.nextToken(), y)) {
+        rv = NS_ERROR_DOM_SYNTAX_ERR;
+        break;
+      }
+    } else {
+      // It's possible for the token to be 10-30 which has
+      // no separator but needs to be parsed as 10, -30
+      const nsAString& leftOver = Substring(iter.get(), end.get());
+      if (leftOver[0] != '-' || !SVGContentUtils::ParseNumber(leftOver, y)) {
+        rv = NS_ERROR_DOM_SYNTAX_ERR;
+        break;
+      }
+    }
+    temp.AppendItem(SVGPoint(x, y));
+  }
+  if (tokenizer.separatorAfterCurrentToken()) {
+    rv = NS_ERROR_DOM_SYNTAX_ERR; // trailing comma
+  }
+  nsresult rv2 = CopyFrom(temp);
+  if (NS_FAILED(rv2)) {
+    return rv2; // prioritize OOM error code over syntax errors
+  }
+  return rv;
+}
+
+} // namespace mozilla