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LatexTranslateListener.java
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LatexTranslateListener.java
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import org.antlr.v4.runtime.*;
import org.antlr.v4.runtime.tree.*;
import org.antlr.v4.runtime.ParserRuleContext;
import org.antlr.v4.runtime.tree.ErrorNode;
import org.antlr.v4.runtime.tree.TerminalNode;
import java.util.*;
import java.io.File;
import java.io.Writer;
import java.io.FileWriter;
import java.io.OutputStreamWriter;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.io.IOException;
import java.lang.StringBuilder;
public class LatexTranslateListener extends Tex_grammarBaseListener{
int sectionNo=0;
int subSectionNo=0;
int makeTitle=0;
int figureNo=0;
int tableRowCount=0;
int fracPart=0;
boolean insidefigure = false;
boolean insideSection = false;
boolean insideSubSection=false;
boolean insideLabel=false;
boolean insideRef=false;
String title="";
String author="";
String date="";
String imageHeight="";
String imageWidth="";
String imageName="";
String imageCaption="";
String imageHTML="";
String titleBox="";
int inlineMath = 0;
int displayMath = 0;
StringBuilder sb = new StringBuilder();
Map<String, String> map = new HashMap<String, String>();
String test = "";
/*----------------------------------------------------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
CSS STYLE CODES FOR PAGE LAYOUT, HEADING, SECTION, SUBSECTION
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
*/
String style="<!-- CSS code for the html file -->"+
"<style>\n" +
" body {\n" +
" font-size:10px;\n" +
" margin-left:20%;\n" +
" margin-right:18%;\n" +
" margin-top:3%;\n" +
" text-align: justify;\n" +
" text-justify: inter-word; }\n" +
" .headingBox{\n" +
" text-align: center;\n" +
" }\n" +
" .heading{\n" +
" font-size:14px;\n" +
" \n" +
" }\n" +
" .author{\n" +
" font-size:10px;\n" +
" text-align: center;\n" +
" }\n" +
" .abstractHeading{\n" +
" font-size:9px;\n" +
" font-weight:bold;\n" +
" text-align: center; \t\n" +
" } \n" +
" .abstract{\n" +
" font-size:9px;\n" +
" text-align: justify;\n" +
" margin-left:13%;\n" +
" margin-right:13%; } \n" +
" .section{\n" +
" font-size:12px;\n" +
" font-weight:bold;\n" +
" }\n" +
" .subsection{\n" +
" font-size:11px;\n" +
" font-weight:bold;\n" +
" }\n" +
" .displaymath{\n" +
" text-align: center;\n" +
" }\n" +
" .center{\n" +
" text-align: center;\n" +
" } \n" +
" table {\n" +
" border-collapse: collapse;\n" +
" }\n" +
" \n" +
" table, th, td {\n" +
" border: 1px solid black;\n" +
" } \n" +
" </style> ";
CustomMethods cm = new CustomMethods();
public String findTextBetweenBraces(String s){
s= s.trim();
int firstIndex = s.indexOf('{');
int lastIndex = s.indexOf('}');
return s.substring(firstIndex+1,lastIndex);
}
@Override public void enterRoot(Tex_grammarParser.RootContext ctx) {
sb.append("<!DOCTYPE html>");
sb.append("\n");
sb.append("<html> \n <head> \n "+style+" \n </head>");
sb.append("\n");
}
@Override public void exitRoot(Tex_grammarParser.RootContext ctx) {
sb.append("</html>");
sb.append("\n");
}
/*----------------------------------------------------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Title, author and date
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
*/
@Override public void enterTitle(Tex_grammarParser.TitleContext ctx) {
String s = ctx.getText();
title = findTextBetweenBraces(s);
}
@Override public void enterAuthor(Tex_grammarParser.AuthorContext ctx) {
String s = ctx.getText();
author = findTextBetweenBraces(s);
}
@Override public void enterDate(Tex_grammarParser.DateContext ctx) {
String s = ctx.getText();
date = findTextBetweenBraces(s);
}
@Override public void enterMaketitle(Tex_grammarParser.MaketitleContext ctx) {
if (makeTitle==0) // To confirm that maketitile is occuring first time in latex document.
{
sb.append("\n");
sb.append("<p class=\"headingBox\">");
sb.append("\n");
sb.append("<span class=\"heading\">");
sb.append(title);
sb.append("</span>");
sb.append("<br><br>");
sb.append("<span class=\"author\">");
sb.append(author);
sb.append("<br><br>");
sb.append(date);
sb.append("</span>");
sb.append("\n");
}
}
@Override public void exitMaketitle(Tex_grammarParser.MaketitleContext ctx) {
if ( makeTitle==0){
sb.append("</p>");
sb.append("\n");
sb.append("<br>");
}
makeTitle=1; //To lock out the maketile tag. Any reoccurence of maketitle tag will not be entertained
}
/*----------------------------------------------------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Begin Document, Section, Subsection, Paragraph, par
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
*/
@Override public void enterBegindocument(Tex_grammarParser.BegindocumentContext ctx) {
sb.append("\n <!-- Main body starts -->");
sb.append("\n<body>");
sb.append("\n");
}
@Override public void exitEnddocument(Tex_grammarParser.EnddocumentContext ctx) {
sb.append("\n</body>");
sb.append("\n");
}
// Abstract
@Override public void enterOptionalAbstract(Tex_grammarParser.OptionalAbstractContext ctx) {
sb.append("<!-- Abstract starts from here --> \n");
sb.append("\n<p class=\"abstractHeading\">");
sb.append("Abstract");
sb.append("</p>\n");
sb.append("<p class=\"abstract\">");
}
@Override public void exitOptionalAbstract(Tex_grammarParser.OptionalAbstractContext ctx) {
sb.append("\n</p>\n");
}
// Section and subsection
@Override public void enterSection(Tex_grammarParser.SectionContext ctx) {
insideSection = true;
insideSubSection = false;
sectionNo = sectionNo+1;
subSectionNo=0;
sb.append("\n");
sb.append("<!-- Section starts from here --> \n");
sb.append("<p>");
sb.append("\n");
}
@Override public void exitSection(Tex_grammarParser.SectionContext ctx) {
// insideSection=false;
//sb.append("\n");
//sb.append("</p>");
}
@Override public void enterSectionName(Tex_grammarParser.SectionNameContext ctx) {
sb.append("<span class=\"section\">");
sb.append(sectionNo+" ");
}
@Override public void exitSectionName(Tex_grammarParser.SectionNameContext ctx) {
sb.append("</span>");
sb.append("<br>");
sb.append("<br>");
}
@Override public void enterSubsection(Tex_grammarParser.SubsectionContext ctx) {
insideSubSection =true;
subSectionNo = subSectionNo+1;
sb.append("\n");
sb.append("<!-- SubSection starts from here --> \n");
sb.append("<p>");
sb.append("\n");
}
@Override public void exitSubsection(Tex_grammarParser.SubsectionContext ctx) {
insideSubSection = false;
//sb.append("<br>");
// sb.append("</p>");
}
@Override public void enterSubsectionName(Tex_grammarParser.SubsectionNameContext ctx) {
sb.append("<span class=\"subsection\">");
sb.append(sectionNo+"."+subSectionNo+" ");
}
@Override public void exitSubsectionName(Tex_grammarParser.SubsectionNameContext ctx) {
sb.append("</span>");
sb.append("<br>");
sb.append("<br>");
}
@Override public void enterPar(Tex_grammarParser.ParContext ctx) {
sb.append("\n </br>   ");
}
/*----------------------------------------------------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Ordered and Unordered list
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
*/
@Override public void enterOrdered_list(Tex_grammarParser.Ordered_listContext ctx) {
sb.append("\n");
sb.append("<!-- Ordered List (Enumerate) starts from here --> \n");
sb.append("<ol>");
sb.append("\n");
}
@Override public void exitOrdered_list(Tex_grammarParser.Ordered_listContext ctx) {
sb.append("</ol>");
sb.append("\n");
}
@Override public void enterUnordered_list(Tex_grammarParser.Unordered_listContext ctx) {
sb.append("\n");
sb.append("<!-- Unordered List (Itemize) starts from here --> \n");
sb.append("<ul>");
sb.append("\n");
}
@Override public void exitUnordered_list(Tex_grammarParser.Unordered_listContext ctx) {
sb.append("</ul>");
sb.append("\n");
}
@Override public void enterListtext(Tex_grammarParser.ListtextContext ctx) {
test="";
test=ctx.getText();
test="<li>"+test;
sb.append("\t<li>");
}
@Override public void exitListtext(Tex_grammarParser.ListtextContext ctx) {
String s;
sb.append("\t</li>");
sb.append("\n");
}
/*----------------------------------------------------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
TEXT TRAMSFORMATIONS : Bold , Italic, underline and latex-newline text segments, CENTRE
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
*/
@Override public void enterBoldtext(Tex_grammarParser.BoldtextContext ctx) {
sb.append("<b>");
}
@Override public void exitBoldtext(Tex_grammarParser.BoldtextContext ctx) {
sb.append("</b> ");
}
@Override public void enterItalictext(Tex_grammarParser.ItalictextContext ctx) {
sb.append("<i>");
}
@Override public void exitItalictext(Tex_grammarParser.ItalictextContext ctx) {
sb.append("</i> ");
}
@Override public void enterLatex_newline(Tex_grammarParser.Latex_newlineContext ctx) {
sb.append("<br>");
}
@Override public void enterUnderline(Tex_grammarParser.UnderlineContext ctx) {
sb.append("<u>");
}
@Override public void exitUnderline(Tex_grammarParser.UnderlineContext ctx) {
sb.append("</u> ");
}
@Override public void enterCenter(Tex_grammarParser.CenterContext ctx) {
sb.append("\n" +
"<p class=\"center\">" +
"\n");
}
@Override public void exitCenter(Tex_grammarParser.CenterContext ctx) {
sb.append("\n");
sb.append("</p>");
sb.append("\n");
}
/*----------------------------------------------------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
GRAPHICS AND IMAGE SECTION
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
*/
@Override public void enterFigure(Tex_grammarParser.FigureContext ctx) {
insidefigure =true;
figureNo = figureNo+1;
sb.append("\n");
sb.append("<!-- Figure Environment starts from here --> \n");
sb.append("<figure> ");
sb.append("\n");
}
@Override public void exitGraphicsHW(Tex_grammarParser.GraphicsHWContext ctx) {
String s = ctx.getText();
imageHeight = cm.extractImageHeight(s);
imageWidth = cm.extractImageWidth(s);
}
@Override public void exitGraphicsName(Tex_grammarParser.GraphicsNameContext ctx) {
String s = ctx.getText();
imageName = cm.extractImageName(s);
}
@Override public void exitGraphics(Tex_grammarParser.GraphicsContext ctx) {
imageHTML=
" <img src=\""+imageName+"\" style=\"width:" +imageWidth +"; height:"+imageHeight+"\">\n"
;
sb.append(imageHTML);
}
@Override public void enterCaption(Tex_grammarParser.CaptionContext ctx) {
//String caption="";
imageCaption = cm.findTextBetweenBraces(ctx.getText());
//sb.append("<caption>");
//sb.append(caption);
//sb.append("</caption>");
}
@Override public void exitCaption(Tex_grammarParser.CaptionContext ctx) {
sb.append(" <figcaption> " +"Fig:" +figureNo+" "+imageCaption+ "</figcaption>\n");
}
@Override public void exitFigure(Tex_grammarParser.FigureContext ctx) {
insidefigure=false;
sb.append("</figure>");
sb.append("\n");
}
//------------------------------------------------------------------
/*----------------------------------------------------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
MATH MODES AND MATH FUNCTIONS
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
*/
@Override public void enterInlinemath(Tex_grammarParser.InlinemathContext ctx) {
inlineMath =1;
}
@Override public void exitInlinemath(Tex_grammarParser.InlinemathContext ctx) {
inlineMath=0;
}
@Override public void enterDisplaymath(Tex_grammarParser.DisplaymathContext ctx) {
displayMath=1;
sb.append("\n");
sb.append("<p class=\"displaymath\">");
sb.append("\n");
}
@Override public void exitDisplaymath(Tex_grammarParser.DisplaymathContext ctx) {
displayMath=0;
sb.append("\n");
sb.append("</p>");
}
@Override public void exitSubscript(Tex_grammarParser.SubscriptContext ctx) {
String s = ctx.getText();
s.trim();
int index = s.indexOf('_');
String first = s.substring(0,index);
String secong = s.substring(index+1);
sb.append(first+"<sub>"+secong+"</sub> ");
}
@Override public void exitSuperscript(Tex_grammarParser.SuperscriptContext ctx) {
String s = ctx.getText();
s.trim();
int index = s.indexOf('^');
String first = s.substring(0,index);
String secong = s.substring(index+1);
sb.append(first+"<sup>"+secong+"</sup> ");
}
@Override public void exitSqrt(Tex_grammarParser.SqrtContext ctx) {
String s = ctx.getText();
String mathPart = cm.findTextBetweenBraces(s);
sb.append(" √"+mathPart);
}
@Override public void exitFrac(Tex_grammarParser.FracContext ctx) {
//String s = ctx.getText();
//String firstPart = cm.extractFirstFracPart(s);
//String secondPart = cm.extractSecondFracPart(s);
//String htmlFrac = firstPart + " ∕ " + secondPart +" " ;
//sb.append(htmlFrac);
}
@Override public void enterFracPart(Tex_grammarParser.FracPartContext ctx) {
if (fracPart==1) sb.append(" ∕ ");
if (fracPart==0){
fracPart=1;
} else fracPart=0;
}
@Override public void enterSum(Tex_grammarParser.SumContext ctx) {
sb.append("∑");
}
@Override public void exitSum(Tex_grammarParser.SumContext ctx) { }
@Override public void exitSumsubscript(Tex_grammarParser.SumsubscriptContext ctx) {
String sub = cm.findTextBetweenBraces(ctx.getText());
sb.append("<sub>"+sub+"</sub>");
}
@Override public void exitSumsuperscript(Tex_grammarParser.SumsuperscriptContext ctx) {
String sup = cm.findTextBetweenBraces(ctx.getText());
sb.append("<sup>"+sup+"</sup> ");
}
//---Definite and Indefinite Integral
@Override public void enterIntegralSign(Tex_grammarParser.IntegralSignContext ctx) {
sb.append("∫");
}
@Override public void exitOperator(Tex_grammarParser.OperatorContext ctx) {
sb.append(ctx.getText());
}
/*----------------------------------------------------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
TABULAR ENVIRONMENT
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
*/
@Override public void enterTable(Tex_grammarParser.TableContext ctx) { }
@Override public void exitTable(Tex_grammarParser.TableContext ctx) { }
@Override public void enterBegin_table(Tex_grammarParser.Begin_tableContext ctx) {
sb.append("<!-- Tabular Environment starts from here --> \n");
sb.append("<div class=\"table_div\">\n" );
}
@Override public void enterBegin_tabular(Tex_grammarParser.Begin_tabularContext ctx) {
sb.append("<table class=\"table\">\n");
}
@Override public void enterTable_alignment(Tex_grammarParser.Table_alignmentContext ctx) { }
@Override public void exitTable_alignment(Tex_grammarParser.Table_alignmentContext ctx) { }
//-------------- Table Row-----------------------------
@Override public void enterTable_row(Tex_grammarParser.Table_rowContext ctx) {
sb.append("\t<tr> \n");
}
@Override public void exitTable_row(Tex_grammarParser.Table_rowContext ctx) {
sb.append(" \n\t</tr> \n");
tableRowCount=tableRowCount+1;
}
//------------------------------------------------
//----------------- Table Column ----------------------------------
@Override public void enterTable_column(Tex_grammarParser.Table_columnContext ctx) {
if ( tableRowCount==0 ){
sb.append("\t<th>");
}
else{
sb.append("\t<td>");
}
}
@Override public void exitTable_column(Tex_grammarParser.Table_columnContext ctx) {
if ( tableRowCount==0 ){
sb.append("</th>");
}
else{
sb.append("</td>");
}
}
//------------------------------------------------------------
@Override public void exitEnd_tabular(Tex_grammarParser.End_tabularContext ctx) {
tableRowCount=0;
sb.append("</table>\n");
}
@Override public void exitEnd_table(Tex_grammarParser.End_tableContext ctx) {
sb.append("</div>"+"\n");
}
/*----------------------------------------------------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
REF AND LABELS
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
*/
@Override public void enterLabel(Tex_grammarParser.LabelContext ctx) {
insideLabel=true;
sb.append("<a id=");
}
@Override public void exitLabel(Tex_grammarParser.LabelContext ctx) {
String label = findTextBetweenBraces(ctx.getText());
String labelValue="";
if (insidefigure==true){
labelValue= Integer.toString(figureNo) ;
}else if (insideSubSection == true){
labelValue = Integer.toString(sectionNo)+"."+Integer.toString(subSectionNo);
}else {
labelValue = Integer.toString(sectionNo);
}
map.put (label,labelValue);
sb.append("\"");
sb.append(label);
sb.append("\">");
sb.append("</a>");
insideLabel=false;
}
@Override public void enterRef(Tex_grammarParser.RefContext ctx) {
insideRef=true;
String refName = findTextBetweenBraces(ctx.getText());
String refValue=map.get(refName);
sb.append("<a href=\"#"+refName+"\">");
sb.append(refValue);
}
@Override public void exitRef(Tex_grammarParser.RefContext ctx) {
sb.append("</a> ");
insideRef=false;
}
@Override public void enterText(Tex_grammarParser.TextContext ctx) {
if (insideLabel==false && insideRef==false) {
sb.append(ctx.getText());
}
}
}