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// Copyright 2014 The Chromium OS 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 "chromeos-dbus-bindings/indented_text.h"
#include <string>
#include <utility>
#include <vector>
#include <base/logging.h>
#include <base/strings/string_util.h>
#include <brillo/strings/string_utils.h>
using std::string;
using std::vector;
namespace chromeos_dbus_bindings {
IndentedText::IndentedText() : offset_(0) {}
void IndentedText::AddBlankLine() {
AddLine("");
}
void IndentedText::AddBlock(const IndentedText& block) {
AddBlockWithOffset(block, 0);
}
void IndentedText::AddBlockWithOffset(const IndentedText& block, size_t shift) {
for (const auto& member : block.contents_) {
AddLineWithOffset(member.first, member.second + shift);
}
}
void IndentedText::AddLine(const std::string& line) {
AddLineWithOffset(line, 0);
}
void IndentedText::AddLineWithOffset(const std::string& line, size_t shift) {
contents_.emplace_back(line, shift + offset_);
}
void IndentedText::AddLineAndPushOffsetTo(const std::string& line,
size_t occurrence,
char c) {
AddLine(line);
size_t pos = 0;
while (occurrence > 0) {
pos = line.find(c, pos);
CHECK(pos != string::npos);
pos++;
occurrence--;
}
PushOffset(pos);
}
void IndentedText::AddComments(const std::string& doc_string) {
// Try to retain indentation in the comments. Find the first non-empty line
// of the comment and find its whitespace indentation prefix.
// For all subsequent lines, remove the same whitespace prefix as found
// at the first line of the comment but keep any additional spaces to
// maintain the comment layout.
auto lines = brillo::string_utils::Split(doc_string, "\n", false, false);
vector<string> lines_out;
lines_out.reserve(lines.size());
bool first_nonempty_found = false;
std::string trim_prefix;
for (string line : lines) {
base::TrimWhitespaceASCII(line, base::TRIM_TRAILING, &line);
if (!first_nonempty_found) {
size_t pos = line.find_first_not_of(" \t");
if (pos != std::string::npos) {
first_nonempty_found = true;
trim_prefix = line.substr(0, pos);
lines_out.push_back(line.substr(pos));
}
} else {
if (base::StartsWithASCII(line, trim_prefix, false)) {
line = line.substr(trim_prefix.length());
} else {
base::TrimWhitespaceASCII(line, base::TRIM_LEADING, &line);
}
lines_out.push_back(line);
}
}
// We already eliminated all empty lines at the beginning of the comment
// block. Now remove the trailing empty lines.
while (!lines_out.empty() && lines_out.back().empty())
lines_out.pop_back();
for (const string& line : lines_out) {
const bool all_whitespace = (line.find_first_not_of(" \t") == string::npos);
if (all_whitespace) {
AddLine("//");
} else {
AddLine("// " + line);
}
}
}
string IndentedText::GetContents() const {
string output;
for (const string& line : GetLines()) {
output.append(line);
output.append("\n");
}
return output;
}
std::vector<std::string> IndentedText::GetLines() const {
vector<string> result;
for (const auto& member : contents_) {
const string& line = member.first;
size_t shift = line.empty() ? 0 : member.second;
string indent(shift, ' ');
result.push_back(indent + line);
}
return result;
}
void IndentedText::PushOffset(size_t shift) {
offset_ += shift;
offset_history_.push_back(shift);
}
void IndentedText::PopOffset() {
CHECK(!offset_history_.empty());
offset_ -= offset_history_.back();
offset_history_.pop_back();
}
void IndentedText::Reset() {
offset_ = 0;
offset_history_.clear();
contents_.clear();
}
} // namespace chromeos_dbus_bindings
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