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// Copyright 2015 The Cobalt Authors. All Rights Reserved.
//
// 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.
#ifndef COBALT_DOM_PARSER_HTML_DECODER_H_
#define COBALT_DOM_PARSER_HTML_DECODER_H_
#include <memory>
#include <string>
#include "base/callback.h"
#include "base/logging.h"
#include "base/memory/ref_counted.h"
#include "base/threading/thread_checker.h"
#include "cobalt/base/source_location.h"
#include "cobalt/dom/document.h"
#include "cobalt/dom/node.h"
#include "cobalt/loader/decoder.h"
namespace cobalt {
namespace dom_parser {
class LibxmlHTMLParserWrapper;
// This decoder class is responsible for decoding a piece of HTML source code
// and creating corresponding DOM nodes and inserting them at the given
// position.
class HTMLDecoder : public loader::Decoder {
public:
// New nodes will be inserted under parent_node, before reference_node.
// If parent_node and document are the same, the HTML input to be decoded is a
// whole document, which means implied <html>, <body> tags generated by the
// libxml parser will be appended to the document. Otherwise the implied tags
// will be ignored.
HTMLDecoder(const scoped_refptr<dom::Document>& document,
const scoped_refptr<dom::Node>& parent_node,
const scoped_refptr<dom::Node>& reference_node,
const int dom_max_element_depth,
const base::SourceLocation& input_location,
const loader::Decoder::OnCompleteFunction& load_complete_callback,
const bool should_run_scripts,
const csp::CSPHeaderPolicy require_csp);
~HTMLDecoder();
// From Decoder.
loader::LoadResponseType OnResponseStarted(
loader::Fetcher* fetcher,
const scoped_refptr<net::HttpResponseHeaders>& headers) override;
void DecodeChunk(const char* data, size_t size) override;
void Finish() override;
bool Suspend() override { return false; }
void Resume(render_tree::ResourceProvider* resource_provider) override {
NOTIMPLEMENTED();
};
private:
// This subclass is responsible for providing the handlers for the interface
// of libxml2's SAX parser.
std::unique_ptr<LibxmlHTMLParserWrapper> libxml_html_parser_wrapper_;
scoped_refptr<dom::Document> document_;
THREAD_CHECKER(thread_checker_);
// If Cobalt user forbids rendering Cobalt without csp headers.
const csp::CSPHeaderPolicy require_csp_;
const loader::Decoder::OnCompleteFunction load_complete_callback_;
DISALLOW_COPY_AND_ASSIGN(HTMLDecoder);
};
} // namespace dom_parser
} // namespace cobalt
#endif // COBALT_DOM_PARSER_HTML_DECODER_H_