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TexMaths support

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git-svn-id: svn://svn.code.sf.net/p/writer2latex/code/trunk@159 f0f2a975-2e09-46c8-9428-3b39399b9f3c
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henrikjust 2014-08-08 13:08:58 +00:00
parent c639066861
commit 79ae252419
6 changed files with 233 additions and 240 deletions
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180
source/java/writer2latex/base/ConverterBase.java
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@ -16,11 +16,11 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
* Copyright: 2002-2012 by Henrik Just
* Copyright: 2002-2014 by Henrik Just
*
* All Rights Reserved.
*
* Version 1.4 (2012-04-07)
* Version 1.4 (2014-08-06)
*
*/
@ -167,83 +167,28 @@ public abstract class ConverterBase implements Converter {
return theSequence;
}
/** Determine whether or not a paragraph contains a display equation.
* A paragraph is a display equation if it contains a single formula and no text content except whitespace
* and an optional sequence number which may be in brackets.
* As a side effect, this method keeps a reference to the equation and the sequence number
*
* @param node the paragraph
* @return true if this is a display equation
*/
public boolean parseDisplayEquation(Node node) {
theEquation = null;
theSequence = null;
return doParseDisplayEquation(node);
}
private boolean doParseDisplayEquation(Node node) {
Node child = node.getFirstChild();
while (child!=null) {
Node equation = getFormula(child);
if (equation!=null) {
if (theEquation==null) {
theEquation = (Element) equation;
}
else { // two or more equations -> not a display
return false;
}
}
else if (Misc.isElement(child)) {
String sName = child.getNodeName();
if (XMLString.TEXT_SEQUENCE.equals(sName)) {
if (theSequence==null) {
theSequence = (Element) child;
}
else { // two sequence numbers -> not a display
return false;
}
}
else if (XMLString.TEXT_SPAN.equals(sName)) {
if (!doParseDisplayEquation(child)) {
return false;
}
}
else if (XMLString.TEXT_S.equals(sName)) {
// Spaces are allowed
}
else if (XMLString.TEXT_TAB.equals(sName)) {
// Tab stops are allowed
}
else if (XMLString.TEXT_TAB_STOP.equals(sName)) { // old
// Tab stops are allowed
}
else if (XMLString.TEXT_SOFT_PAGE_BREAK.equals(sName)) { // since ODF 1.1
// Soft page breaks are allowed
}
else {
// Other elements -> not a display
return false;
}
}
else if (Misc.isText(child)) {
String s = child.getNodeValue();
int nLen = s.length();
for (int i=0; i<nLen; i++) {
char c = s.charAt(i);
if (c!='(' && c!=')' && c!='[' && c!=']' && c!='{' && c!='}' && c!=' ' && c!='\u00A0') {
// Characters except brackets and whitespace -> not a display
return false;
}
}
}
child = child.getNextSibling();
}
return true;
/** Get a TexMaths equation from a draw:frame (PNG formula) or draw:g element (SVG)
* Such an element is a TexMaths equation if it contains an svg:title element with content "TexMaths"
* The actual formula is the content of an svg:desc element
*
* @param node the draw:frame or draw:g element to check
* @return the TexMaths equation, or null if this is not a TexMaths equation
*/
public Element getTexMathsEquation(Element node) {
Element svgTitle = Misc.getChildByTagName(node, XMLString.SVG_TITLE);
if (svgTitle!=null && "TexMaths".equals(Misc.getPCDATA(svgTitle))) {
return Misc.getChildByTagName(node, XMLString.SVG_DESC);
}
return null;
}
// TODO: Extend OfficeReader to handle frames
private Node getFormula(Node node) {
if (Misc.isElement(node,XMLString.DRAW_FRAME)) {
/** Get a MathML formula from a draw:frame
*
* @param node the draw:frame
* @return the MathML element, or null if this is not a MathML formula
*/
public Element getMathmlEquation(Element node) {
if (node.getTagName().equals(XMLString.DRAW_FRAME)) {
node=Misc.getFirstChildElement(node);
}
@ -283,7 +228,86 @@ public abstract class ConverterBase implements Converter {
}
return null;
}
/** Determine whether or not a paragraph contains a display equation.
* A paragraph is a display equation if it contains a single formula and no text content except whitespace
* and an optional sequence number which may be in brackets.
* As a side effect, this method keeps a reference to the equation and the sequence number
*
* @param node the paragraph
* @return true if this is a display equation
*/
public boolean parseDisplayEquation(Node node) {
theEquation = null;
theSequence = null;
return doParseDisplayEquation(node);
}
private boolean doParseDisplayEquation(Node node) {
Node child = node.getFirstChild();
while (child!=null) {
if (Misc.isElement(child)) {
Element elm = (Element) child;
String sName = elm.getTagName();
// First check for MathML or TexMaths equation
Element equation = getMathmlEquation(elm);
if (equation==null) {
equation = getTexMathsEquation(elm);
}
if (equation!=null) {
if (theEquation==null) {
theEquation = equation;
}
else { // two or more equations -> not a display
return false;
}
}
else if (XMLString.TEXT_SEQUENCE.equals(sName)) {
if (theSequence==null) {
theSequence = elm;
}
else { // two sequence numbers -> not a display
return false;
}
}
else if (XMLString.TEXT_SPAN.equals(sName)) {
if (!doParseDisplayEquation(child)) {
return false;
}
}
else if (XMLString.TEXT_S.equals(sName)) {
// Spaces are allowed
}
else if (XMLString.TEXT_TAB.equals(sName)) {
// Tab stops are allowed
}
else if (XMLString.TEXT_TAB_STOP.equals(sName)) { // old
// Tab stops are allowed
}
else if (XMLString.TEXT_SOFT_PAGE_BREAK.equals(sName)) { // since ODF 1.1
// Soft page breaks are allowed
}
else {
// Other elements -> not a display
return false;
}
}
else if (Misc.isText(child)) {
String s = child.getNodeValue();
int nLen = s.length();
for (int i=0; i<nLen; i++) {
char c = s.charAt(i);
if (c!='(' && c!=')' && c!='[' && c!=']' && c!='{' && c!='}' && c!=' ' && c!='\u00A0') {
// Characters except brackets and whitespace -> not a display
return false;
}
}
}
child = child.getNextSibling();
}
return true;
}
}