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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <BasCodeTagger.hxx>
#include <iostream>
LibXmlTreeWalker::LibXmlTreeWalker( xmlDocPtr doc )
{
if ( doc == nullptr )
throw BasicCodeTagger::NULL_DOCUMENT;
m_pCurrentNode = xmlDocGetRootElement( doc );
if ( m_pCurrentNode == nullptr )
throw BasicCodeTagger::EMPTY_DOCUMENT;
else if ( m_pCurrentNode->xmlChildrenNode != nullptr )
m_Queue.push_back( m_pCurrentNode->xmlChildrenNode );
nextNode();
}
void LibXmlTreeWalker::nextNode()
{
//next node
if ( m_pCurrentNode->next == nullptr )
{
m_pCurrentNode = m_Queue.front();
m_Queue.pop_front();
}
else
m_pCurrentNode = m_pCurrentNode->next;
//queue children if they exist
if ( m_pCurrentNode->xmlChildrenNode != nullptr )
m_Queue.push_back( m_pCurrentNode->xmlChildrenNode );
}
void LibXmlTreeWalker::ignoreCurrNodesChildren()
{
if ( m_pCurrentNode->xmlChildrenNode != nullptr )
m_Queue.pop_back();
}
bool LibXmlTreeWalker::end() const
{
return m_pCurrentNode->next == nullptr && m_Queue.empty();
}
BasicCodeTagger::BasicCodeTagger( xmlDocPtr rootDoc ):
m_Highlighter(HighlighterLanguage::Basic)
{
if ( rootDoc == nullptr )
throw NULL_DOCUMENT;
m_pDocument = rootDoc;
m_pXmlTreeWalker = nullptr;
m_bTaggingCompleted = false;
}
BasicCodeTagger::~BasicCodeTagger()
{
}
//!Gathers all the <bascode> tag nodes from xml tree.
/*!
* Assumes m_pDocument is valid. Handles m_pXmlTreeWalker and m_BasicCodeContainerTags members.
*/
void BasicCodeTagger::getBasicCodeContainerNodes()
{
xmlNodePtr currentNode;
m_BasicCodeContainerTags.clear();
m_pXmlTreeWalker.reset(new LibXmlTreeWalker( m_pDocument ));
currentNode = m_pXmlTreeWalker->currentNode();
if ( !( xmlStrcmp( currentNode->name, reinterpret_cast<const xmlChar*>("bascode") ) ) )
{ //Found <bascode>
m_BasicCodeContainerTags.push_back( currentNode ); //it goes to the end of the list
}
while ( !m_pXmlTreeWalker->end() )
{
m_pXmlTreeWalker->nextNode();
if ( !( xmlStrcmp( m_pXmlTreeWalker->currentNode()->name, reinterpret_cast<const xmlChar*>("bascode") ) ) )
{ //Found <bascode>
m_BasicCodeContainerTags.push_back( m_pXmlTreeWalker->currentNode() ); //it goes to the end of the list
m_pXmlTreeWalker->ignoreCurrNodesChildren();
}
}
}
//! Extracts Basic Codes contained in <bascode> tags.
/*!
* For each <bascode> this method iterates through it's <paragraph> tags and "inserts" <item> tags according
* to the Basic code syntax found in that paragraph.
*/
void BasicCodeTagger::tagBasCodeParagraphs()
{
//helper variables
xmlNodePtr currParagraph;
for (auto const& currBascodeNode : m_BasicCodeContainerTags)
{
currParagraph = currBascodeNode->xmlChildrenNode; //first <paragraph>
while ( currParagraph != nullptr )
{
tagParagraph( currParagraph );
currParagraph=currParagraph->next;
}
}
m_BasicCodeContainerTags.clear();
}
//! Used by tagBasCodeParagraphs(). It does the work on the current paragraph containing Basic code.
void BasicCodeTagger::tagParagraph( xmlNodePtr paragraph )
{
//1. get paragraph text
xmlChar* codeSnippet;
codeSnippet = xmlNodeListGetString( m_pDocument, paragraph->xmlChildrenNode, 1 );
if ( codeSnippet == nullptr )
{
return; //no text, nothing more to do here
}
//2. delete every child from paragraph (except attributes)
xmlNodePtr curNode = paragraph->xmlChildrenNode;
xmlNodePtr sibling;
while ( curNode != nullptr )
{
sibling = curNode->next;
xmlUnlinkNode( curNode );
xmlFreeNode( curNode );
curNode = sibling;
}
//3. create new paragraph content
OUString strLine( reinterpret_cast<const char*>(codeSnippet),
strlen(reinterpret_cast<const char*>(codeSnippet)),
RTL_TEXTENCODING_UTF8 );
std::vector<HighlightPortion> portions;
m_Highlighter.getHighlightPortions( strLine, portions );
for (auto const& portion : portions)
{
OString sToken(OUStringToOString(strLine.copy(portion.nBegin, portion.nEnd-portion.nBegin), RTL_TEXTENCODING_UTF8));
xmlNodePtr text = xmlNewText(reinterpret_cast<const xmlChar*>(sToken.getStr()));
if ( portion.tokenType != TokenType::Whitespace )
{
xmlChar* typeStr = getTypeString( portion.tokenType );
curNode = xmlNewTextChild( paragraph, nullptr, reinterpret_cast<xmlChar const *>("item"), nullptr );
xmlNewProp( curNode, reinterpret_cast<xmlChar const *>("type"), typeStr );
xmlAddChild( curNode, text );
xmlFree( typeStr );
}
else
xmlAddChild( paragraph, text );
}
xmlFree( codeSnippet );
}
//! Manages tagging process.
/*!
* This is the "main" function of BasicCodeTagger.
*/
void BasicCodeTagger::tagBasicCodes()
{
if ( m_bTaggingCompleted )
return;
//gather <bascode> nodes
try
{
getBasicCodeContainerNodes();
}
catch (TaggerException &ex)
{
std::cout << "BasCodeTagger error occurred. Error code:" << ex << std::endl;
}
//tag basic code paragraphs in <bascode> tag
tagBasCodeParagraphs();
m_bTaggingCompleted = true;
}
//! Converts SyntaxHighlighter's TokenTypes enum to a type string for <item type=... >
xmlChar* BasicCodeTagger::getTypeString( TokenType tokenType )
{
const char* str;
switch ( tokenType )
{
case TokenType::Unknown :
str = "unknown";
break;
case TokenType::Identifier :
str = "identifier";
break;
case TokenType::Whitespace :
str = "whitespace";
break;
case TokenType::Number :
str = "number";
break;
case TokenType::String :
str = "string";
break;
case TokenType::EOL :
str = "eol";
break;
case TokenType::Comment :
str = "comment";
break;
case TokenType::Error :
str = "error";
break;
case TokenType::Operator :
str = "operator";
break;
case TokenType::Keywords :
str = "keyword";
break;
case TokenType::Parameter :
str = "parameter";
break;
default :
str = "unknown";
break;
}
return xmlCharStrdup( str );
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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