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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_BASE_WEBUI_I18N_SOURCE_STREAM_H_
#define UI_BASE_WEBUI_I18N_SOURCE_STREAM_H_
#include <memory>
#include <string>
#include "base/component_export.h"
#include "base/memory/raw_ptr.h"
#include "net/filter/filter_source_stream.h"
#include "net/filter/source_stream_type.h"
#include "ui/base/template_expressions.h"
namespace ui {
class COMPONENT_EXPORT(UI_BASE) I18nSourceStream
: public net::FilterSourceStream {
public:
I18nSourceStream(const I18nSourceStream&) = delete;
I18nSourceStream& operator=(const I18nSourceStream&) = delete;
~I18nSourceStream() override;
// Factory function to create an I18nSourceStream.
// |replacements| is a dictionary of i18n replacements.
static std::unique_ptr<I18nSourceStream> Create(
std::unique_ptr<SourceStream> previous,
net::SourceStreamType type,
const ui::TemplateReplacements* replacements);
private:
I18nSourceStream(std::unique_ptr<SourceStream> previous,
net::SourceStreamType type,
const TemplateReplacements* replacements);
// SourceStream implementation.
std::string GetTypeAsString() const override;
base::expected<size_t, net::Error> FilterData(
net::IOBuffer* output_buffer,
size_t output_buffer_size,
net::IOBuffer* input_buffer,
size_t input_buffer_size,
size_t* consumed_bytes,
bool upstream_end_reached) override;
// Keep split $i18n tags (wait for the whole tag). This is expected to vary
// in size from 0 to a few KB and should never be larger than the input file
// (in the worst case).
std::string input_;
// Keep excess that didn't fit in the output buffer. This is expected to vary
// in size from 0 to a few KB and should never get much larger than the input
// file (in the worst case).
std::string output_;
// A map of i18n replacement keys and translations.
raw_ptr<const TemplateReplacements> replacements_;
};
} // namespace ui
#endif // UI_BASE_WEBUI_I18N_SOURCE_STREAM_H_
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