mirror of https://github.com/qpdf/qpdf.git
81 lines
2.5 KiB
C++
81 lines
2.5 KiB
C++
// Copyright (c) 2005-2023 Jay Berkenbilt
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//
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// This file is part of qpdf.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Versions of qpdf prior to version 7 were released under the terms
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// of version 2.0 of the Artistic License. At your option, you may
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// continue to consider qpdf to be licensed under those terms. Please
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// see the manual for additional information.
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#ifndef PL_QPDFTOKENIZER_HH
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#define PL_QPDFTOKENIZER_HH
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#include <qpdf/Pipeline.hh>
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#include <qpdf/Pl_Buffer.hh>
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#include <qpdf/PointerHolder.hh> // unused -- remove in qpdf 12 (see #785)
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#include <qpdf/QPDFObjectHandle.hh>
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#include <qpdf/QPDFTokenizer.hh>
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#include <memory>
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// Tokenize the incoming text using QPDFTokenizer and pass the tokens
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// in turn to a QPDFObjectHandle::TokenFilter object. All bytes of
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// incoming content will be included in exactly one token and passed
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// downstream.
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// This is a very low-level interface for working with token filters.
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// Most code will want to use QPDFObjectHandle::filterPageContents or
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// QPDFObjectHandle::addTokenFilter. See QPDFObjectHandle.hh for
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// details.
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class QPDF_DLL_CLASS Pl_QPDFTokenizer: public Pipeline
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{
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public:
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// Whatever pipeline is provided as "next" will be set as the
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// pipeline that the token filter writes to. If next is not
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// provided, any output written by the filter will be discarded.
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QPDF_DLL
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Pl_QPDFTokenizer(
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char const* identifier, QPDFObjectHandle::TokenFilter* filter, Pipeline* next = nullptr);
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QPDF_DLL
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virtual ~Pl_QPDFTokenizer();
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QPDF_DLL
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virtual void write(unsigned char const* buf, size_t len);
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QPDF_DLL
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virtual void finish();
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private:
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class QPDF_DLL_PRIVATE Members
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{
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friend class Pl_QPDFTokenizer;
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public:
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QPDF_DLL
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~Members() = default;
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private:
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Members();
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Members(Members const&) = delete;
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QPDFObjectHandle::TokenFilter* filter;
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QPDFTokenizer tokenizer;
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Pl_Buffer buf;
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};
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std::shared_ptr<Members> m;
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};
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#endif // PL_QPDFTOKENIZER_HH
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