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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 "mozilla/ArrayUtils.h"
#include "SVGPointList.h"
#include "nsCharSeparatedTokenizer.h"
#include "nsContentUtils.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<nsContentUtils::IsHTMLWhitespace,
nsTokenizerFlags::SeparatorOptional>
tokenizer(aValue, ',');
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
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