blob: d3327218f0750555128e5cdd86208d9701757ab6 [file] [log] [blame]
// 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 "ui/base/webui/i18n_source_stream.h"
#include <algorithm>
#include <utility>
#include "base/logging.h"
#include "base/strings/string_piece.h"
#include "net/base/io_buffer.h"
namespace ui {
I18nSourceStream::~I18nSourceStream() {}
std::unique_ptr<I18nSourceStream> I18nSourceStream::Create(
std::unique_ptr<SourceStream> upstream,
SourceStream::SourceType type,
const TemplateReplacements* replacements) {
std::unique_ptr<I18nSourceStream> source(
new I18nSourceStream(std::move(upstream), type, replacements));
return source;
I18nSourceStream::I18nSourceStream(std::unique_ptr<SourceStream> upstream,
SourceStream::SourceType type,
const TemplateReplacements* replacements)
: FilterSourceStream(type, std::move(upstream)),
replacements_(replacements) {}
std::string I18nSourceStream::GetTypeAsString() const {
return "i18n";
int I18nSourceStream::FilterData(net::IOBuffer* output_buffer,
int output_buffer_size,
net::IOBuffer* input_buffer,
int input_buffer_size,
int* consumed_bytes,
bool upstream_end_reached) {
// |input_| is often empty (or it may have something from the prior call).
input_.append(input_buffer->data(), input_buffer_size);
*consumed_bytes = input_buffer_size;
// The replacement tag starts with '$' and ends with '}'. The white-space
// characters are an optimization that looks for characters that are invalid
// within $i18n{} tags.
size_t pos = input_.find_last_of("$} \t\r\n");
std::string to_process;
if (!upstream_end_reached && pos != std::string::npos && input_[pos] == '$') {
// If there is a trailing '$' then split the |input_| at that point. Process
// the first part; save the second part for the next call to FilterData().
to_process.assign(input_, 0, pos);
input_.erase(0, pos);
} else {
// There is no risk of a split key, process the whole input.
output_.append(ReplaceTemplateExpressions(to_process, *replacements_));
int bytes_out =
std::min(output_.size(), static_cast<size_t>(output_buffer_size));
output_.copy(output_buffer->data(), bytes_out);
output_.erase(0, bytes_out);
return bytes_out;
} // namespace ui