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Prevent IndexOutOfBoundsException in equation rendering by checking non-empty 'texsymbol' strings

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This commit introduces a check before accessing the first character of 'texsymbol' strings in equation rendering, preventing IndexOutOfBoundsException when custom functions names are used which can lead to an empty string. This change ensures that equations custom variables names ending with standard function strings are handled gracefully without errors
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BOUDJENIBA Oussama 2024-03-04 09:58:29 +01:00 committed by GitHub
parent a0be1ed677
commit d85f96256e
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GPG Key ID: B5690EEEBB952194
1 changed files with 2 additions and 2 deletions
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4
src/net/sourceforge/plantuml/math/ASCIIMathTeXImg.java
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@ -602,7 +602,7 @@ public class ASCIIMathTeXImg {
case CONST: case CONST:
str = AMremoveCharsAndBlanks(str, symbol.input.length()); str = AMremoveCharsAndBlanks(str, symbol.input.length());
String texsymbol = AMTgetTeXsymbol(symbol); String texsymbol = AMTgetTeXsymbol(symbol);
if (texsymbol.charAt(0) == '\\' || symbol.tag.equals("mo")) if (texsymbol.isEmpty() || texsymbol.charAt(0) == '\\' || symbol.tag.equals("mo"))
return new String[] { texsymbol, str }; return new String[] { texsymbol, str };
else { else {
return new String[] { "{" + texsymbol + "}", str }; return new String[] { "{" + texsymbol + "}", str };
@ -676,7 +676,7 @@ public class ASCIIMathTeXImg {
if (result[0] == null) if (result[0] == null)
return new String[] { "{" + AMTgetTeXsymbol(symbol) + "}", str }; return new String[] { "{" + AMTgetTeXsymbol(symbol) + "}", str };
if (symbol.hasFlag("func")) { // functions hack if (symbol.hasFlag("func")) { // functions hack
st = "" + str.charAt(0); st = "" + (str.isEmpty() ? "" : str.charAt(0));
if (st.equals("^") || st.equals("_") || st.equals("/") || st.equals("|") || st.equals(",") if (st.equals("^") || st.equals("_") || st.equals("/") || st.equals("|") || st.equals(",")
|| (symbol.input.length() == 1 && symbol.input.matches("\\w") && !st.equals("("))) { || (symbol.input.length() == 1 && symbol.input.matches("\\w") && !st.equals("("))) {
return new String[] { "{" + AMTgetTeXsymbol(symbol) + "}", str }; return new String[] { "{" + AMTgetTeXsymbol(symbol) + "}", str };