forked from mirrors/gecko-dev
103 lines
3 KiB
C++
103 lines
3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/ArrayUtils.h"
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#include "SVGPointList.h"
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#include "nsCharSeparatedTokenizer.h"
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#include "nsTextFormatter.h"
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#include "SVGContentUtils.h"
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namespace mozilla {
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nsresult
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SVGPointList::CopyFrom(const SVGPointList& rhs)
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{
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if (!mItems.Assign(rhs.mItems, fallible)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return NS_OK;
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}
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void
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SVGPointList::GetValueAsString(nsAString& aValue) const
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{
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aValue.Truncate();
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char16_t buf[50];
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uint32_t last = mItems.Length() - 1;
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for (uint32_t i = 0; i < mItems.Length(); ++i) {
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// Would like to use aValue.AppendPrintf("%f,%f", item.mX, item.mY),
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// but it's not possible to always avoid trailing zeros.
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nsTextFormatter::snprintf(buf, ArrayLength(buf),
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u"%g,%g",
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double(mItems[i].mX), double(mItems[i].mY));
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// We ignore OOM, since it's not useful for us to return an error.
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aValue.Append(buf);
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if (i != last) {
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aValue.Append(' ');
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}
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}
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}
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nsresult
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SVGPointList::SetValueFromString(const nsAString& aValue)
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{
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// The spec says that the list is parsed and accepted up to the first error
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// encountered, so we must call CopyFrom even if an error occurs. We still
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// want to throw any error code from setAttribute if there's a problem
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// though, so we must take care to return any error code.
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nsresult rv = NS_OK;
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SVGPointList temp;
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nsCharSeparatedTokenizerTemplate<nsContentUtils::IsHTMLWhitespace>
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tokenizer(aValue, ',', nsCharSeparatedTokenizer::SEPARATOR_OPTIONAL);
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while (tokenizer.hasMoreTokens()) {
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const nsAString& token = tokenizer.nextToken();
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RangedPtr<const char16_t> iter =
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SVGContentUtils::GetStartRangedPtr(token);
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const RangedPtr<const char16_t> end =
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SVGContentUtils::GetEndRangedPtr(token);
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float x;
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if (!SVGContentUtils::ParseNumber(iter, end, x)) {
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rv = NS_ERROR_DOM_SYNTAX_ERR;
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break;
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}
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float y;
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if (iter == end) {
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if (!tokenizer.hasMoreTokens() ||
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!SVGContentUtils::ParseNumber(tokenizer.nextToken(), y)) {
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rv = NS_ERROR_DOM_SYNTAX_ERR;
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break;
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}
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} else {
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// It's possible for the token to be 10-30 which has
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// no separator but needs to be parsed as 10, -30
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const nsAString& leftOver = Substring(iter.get(), end.get());
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if (leftOver[0] != '-' || !SVGContentUtils::ParseNumber(leftOver, y)) {
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rv = NS_ERROR_DOM_SYNTAX_ERR;
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break;
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}
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}
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temp.AppendItem(SVGPoint(x, y));
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}
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if (tokenizer.separatorAfterCurrentToken()) {
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rv = NS_ERROR_DOM_SYNTAX_ERR; // trailing comma
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}
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nsresult rv2 = CopyFrom(temp);
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if (NS_FAILED(rv2)) {
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return rv2; // prioritize OOM error code over syntax errors
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}
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return rv;
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}
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} // namespace mozilla
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