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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "tools/gn/xml_element_writer.h"
#include "base/memory/ptr_util.h"
XmlAttributes::XmlAttributes() {}
XmlAttributes::XmlAttributes(const base::StringPiece& attr_key,
const base::StringPiece& attr_value) {
add(attr_key, attr_value);
}
XmlAttributes& XmlAttributes::add(const base::StringPiece& attr_key,
const base::StringPiece& attr_value) {
push_back(std::make_pair(attr_key, attr_value));
return *this;
}
XmlElementWriter::XmlElementWriter(std::ostream& out,
const std::string& tag,
const XmlAttributes& attributes)
: XmlElementWriter(out, tag, attributes, 0) {}
XmlElementWriter::XmlElementWriter(std::ostream& out,
const std::string& tag,
const XmlAttributes& attributes,
int indent)
: out_(out),
tag_(tag),
indent_(indent),
opening_tag_finished_(false),
one_line_(true) {
out << std::string(indent, ' ') << '<' << tag;
for (auto attribute : attributes)
out << ' ' << attribute.first << "=\"" << attribute.second << '"';
}
XmlElementWriter::~XmlElementWriter() {
if (!opening_tag_finished_) {
// The XML spec does not require a space before the closing slash. However,
// Eclipse is unable to parse XML settings files if there is no space.
out_ << " />" << std::endl;
} else {
if (!one_line_)
out_ << std::string(indent_, ' ');
out_ << "</" << tag_ << '>' << std::endl;
}
}
void XmlElementWriter::Text(const base::StringPiece& content) {
StartContent(false);
out_ << content;
}
std::unique_ptr<XmlElementWriter> XmlElementWriter::SubElement(
const std::string& tag) {
return SubElement(tag, XmlAttributes());
}
std::unique_ptr<XmlElementWriter> XmlElementWriter::SubElement(
const std::string& tag,
const XmlAttributes& attributes) {
StartContent(true);
return base::WrapUnique(
new XmlElementWriter(out_, tag, attributes, indent_ + 2));
}
std::ostream& XmlElementWriter::StartContent(bool start_new_line) {
if (!opening_tag_finished_) {
out_ << '>';
opening_tag_finished_ = true;
if (start_new_line && one_line_) {
out_ << std::endl;
one_line_ = false;
}
}
return out_;
}
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