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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "text/Printer.h"
#include <algorithm>
#include "io/Util.h"
using ::aapt::io::OutputStream;
using ::android::StringPiece;
namespace aapt {
namespace text {
Printer& Printer::Println(const StringPiece& str) {
Print(str);
return Print("\n");
}
Printer& Printer::Println() {
return Print("\n");
}
Printer& Printer::Print(const StringPiece& str) {
if (error_) {
return *this;
}
auto remaining_str_begin = str.begin();
const auto remaining_str_end = str.end();
while (remaining_str_end != remaining_str_begin) {
// Find the next new-line.
const auto new_line_iter = std::find(remaining_str_begin, remaining_str_end, '\n');
// We will copy the string up until the next new-line (or end of string).
const StringPiece str_to_copy = str.substr(remaining_str_begin, new_line_iter);
if (!str_to_copy.empty()) {
if (needs_indent_) {
for (int i = 0; i < indent_level_; i++) {
if (!io::Copy(out_, " ")) {
error_ = true;
return *this;
}
}
needs_indent_ = false;
}
if (!io::Copy(out_, str_to_copy)) {
error_ = true;
return *this;
}
}
// If we found a new-line.
if (new_line_iter != remaining_str_end) {
if (!io::Copy(out_, "\n")) {
error_ = true;
return *this;
}
needs_indent_ = true;
// Ok to increment iterator here because we know that the '\n' character is one byte.
remaining_str_begin = new_line_iter + 1;
} else {
remaining_str_begin = new_line_iter;
}
}
return *this;
}
void Printer::Indent() {
++indent_level_;
}
void Printer::Undent() {
--indent_level_;
}
} // namespace text
} // namespace aapt
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