168 lines
6.9 KiB
C++
168 lines
6.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include "HtmlFmtFlt.hxx"
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#include <rtl/string.h>
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#include <string>
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#include <sstream>
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#include <vector>
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#include <iomanip>
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#include <boost/assert.hpp>
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using namespace com::sun::star::uno;
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//------------------------------------------------------------------------------
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// converts the openoffice text/html clipboard format to the HTML Format
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// well known under MS Windows
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// the MS HTML Format has a header before the real html data
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//
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// Version:1.0 Version number of the clipboard. Staring is 0.9
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// StartHTML: Byte count from the beginning of the clipboard to the start
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// of the context, or -1 if no context
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// EndHTML: Byte count from the beginning of the clipboard to the end
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// of the context, or -1 if no context
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// StartFragment: Byte count from the beginning of the clipboard to the
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// start of the fragment
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// EndFragment: Byte count from the beginning of the clipboard to the
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// end of the fragment
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// StartSelection: Byte count from the beginning of the clipboard to the
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// start of the selection
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// EndSelection: Byte count from the beginning of the clipboard to the
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// end of the selection
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//
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// StartSelection and EndSelection are optional
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// The fragment should be preceded and followed by the HTML comments
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// <!--StartFragment--> and <!--EndFragment--> (no space between !-- and the
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// text
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//------------------------------------------------------------------------------
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namespace // private
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{
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std::string GetHtmlFormatHeader(size_t startHtml, size_t endHtml, size_t startFragment, size_t endFragment)
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{
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std::ostringstream htmlHeader;
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htmlHeader << "Version:1.0" << '\r' << '\n';
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htmlHeader << "StartHTML:" << std::setw(10) << std::setfill('0') << std::dec << startHtml << '\r' << '\n';
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htmlHeader << "EndHTML:" << std::setw(10) << std::setfill('0') << std::dec << endHtml << '\r' << '\n';
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htmlHeader << "StartFragment:" << std::setw(10) << std::setfill('0') << std::dec << startFragment << '\r' << '\n';
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htmlHeader << "EndFragment:" << std::setw(10) << std::setfill('0') << std::dec << endFragment << '\r' << '\n';
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return htmlHeader.str();
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}
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} // namespace private
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// the office always writes the start and end html tag in upper cases and
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// without spaces both tags don't allow parameters
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const std::string TAG_HTML = std::string("<HTML>");
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const std::string TAG_END_HTML = std::string("</HTML>");
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// The body tag may have parameters so we need to search for the
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// closing '>' manually e.g. <BODY param> #92840#
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const std::string TAG_BODY = std::string("<BODY");
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const std::string TAG_END_BODY = std::string("</BODY");
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Sequence<sal_Int8> SAL_CALL TextHtmlToHTMLFormat(Sequence<sal_Int8>& aTextHtml)
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{
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OSL_ASSERT(aTextHtml.getLength() > 0);
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if (!(aTextHtml.getLength() > 0))
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return Sequence<sal_Int8>();
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// fill the buffer with dummy values to calc the exact length
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std::string dummyHtmlHeader = GetHtmlFormatHeader(0, 0, 0, 0);
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size_t lHtmlFormatHeader = dummyHtmlHeader.length();
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std::string textHtml(
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reinterpret_cast<const sal_Char*>(aTextHtml.getConstArray()),
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reinterpret_cast<const sal_Char*>(aTextHtml.getConstArray()) + aTextHtml.getLength());
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std::string::size_type nStartHtml = textHtml.find(TAG_HTML) + lHtmlFormatHeader - 1; // we start one before '<HTML>' Word 2000 does also so
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std::string::size_type nEndHtml = textHtml.find(TAG_END_HTML) + lHtmlFormatHeader + TAG_END_HTML.length() + 1; // our SOffice 5.2 wants 2 behind </HTML>?
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// The body tag may have parameters so we need to search for the
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// closing '>' manually e.g. <BODY param> #92840#
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std::string::size_type nStartFragment = textHtml.find(">", textHtml.find(TAG_BODY)) + lHtmlFormatHeader + 1;
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std::string::size_type nEndFragment = textHtml.find(TAG_END_BODY) + lHtmlFormatHeader;
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std::string htmlFormat = GetHtmlFormatHeader(nStartHtml, nEndHtml, nStartFragment, nEndFragment);
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htmlFormat += textHtml;
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Sequence<sal_Int8> byteSequence(htmlFormat.length() + 1); // space the trailing '\0'
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memset(byteSequence.getArray(), 0, byteSequence.getLength());
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memcpy(
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static_cast<void*>(byteSequence.getArray()),
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static_cast<const void*>(htmlFormat.c_str()),
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htmlFormat.length());
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return byteSequence;
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}
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const char* HtmlStartTag = "<html";
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Sequence<sal_Int8> HTMLFormatToTextHtml(const Sequence<sal_Int8>& aHTMLFormat)
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{
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BOOST_ASSERT(isHTMLFormat(aHTMLFormat) && "No HTML Format provided");
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Sequence<sal_Int8>& nonconstHTMLFormatRef = const_cast< Sequence<sal_Int8>& >(aHTMLFormat);
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sal_Char* dataStart = reinterpret_cast<sal_Char*>(nonconstHTMLFormatRef.getArray());
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sal_Char* dataEnd = dataStart + nonconstHTMLFormatRef.getLength() - 1;
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const sal_Char* htmlStartTag = strcasestr(dataStart, HtmlStartTag);
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BOOST_ASSERT(htmlStartTag && "Seems to be no HTML at all");
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// It doesn't seem to be HTML? Well then simply return what has been
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// provided in non-debug builds
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if (htmlStartTag == NULL)
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{
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return aHTMLFormat;
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}
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sal_Int32 len = dataEnd - htmlStartTag;
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Sequence<sal_Int8> plainHtmlData(len);
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memcpy(static_cast<void*>(plainHtmlData.getArray()), htmlStartTag, len);
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return plainHtmlData;
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}
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/* A simple format detection. We are just comparing the first few bytes
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of the provided byte sequence to see whether or not it is the MS
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Office Html format. If it shows that this is not reliable enough we
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can improve this
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*/
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const char HtmlFormatStart[] = "Version:";
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int HtmlFormatStartLen = (sizeof(HtmlFormatStart) - 1);
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bool isHTMLFormat(const Sequence<sal_Int8>& aHtmlSequence)
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{
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if (aHtmlSequence.getLength() < HtmlFormatStartLen)
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return false;
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return rtl_str_compareIgnoreAsciiCase_WithLength(HtmlFormatStart,
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HtmlFormatStartLen,
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reinterpret_cast<const sal_Char*>(aHtmlSequence.getConstArray()),
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HtmlFormatStartLen) == 0;
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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