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75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
// Copyright (c) 2005-2024 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"); you may not use this file except
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// in compliance with the License. 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 distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under
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// the License.
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//
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// Versions of qpdf prior to version 7 were released under the terms of version 2.0 of the Artistic
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// License. At your option, you may continue to consider qpdf to be licensed under those terms.
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// Please 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 in turn to a
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// QPDFObjectHandle::TokenFilter object. All bytes of incoming content will be included in exactly
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// one token and passed downstream.
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// This is a very low-level interface for working with token filters. Most code will want to use
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// QPDFObjectHandle::filterPageContents or QPDFObjectHandle::addTokenFilter. See QPDFObjectHandle.hh
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// for 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 pipeline that the token filter
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// writes to. If next is not 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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~Pl_QPDFTokenizer() override;
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QPDF_DLL
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void write(unsigned char const* buf, size_t len) override;
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QPDF_DLL
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void finish() override;
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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{nullptr};
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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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