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Improve error mesage on save, add current field content #4710

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Mar 3, 2019
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30 changes: 14 additions & 16 deletions src/main/java/org/jabref/logic/bibtex/LatexFieldFormatter.java
Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,6 @@ public class LatexFieldFormatter {
private final FieldContentParser parser;
private StringBuilder stringBuilder;


public LatexFieldFormatter(LatexFieldFormatterPreferences prefs) {
this(true, prefs);
}
Expand All @@ -48,26 +47,26 @@ private static void checkBraces(String text) throws InvalidFieldValueException {
char item = text.charAt(i);

boolean charBeforeIsEscape = false;
if (i > 0 && text.charAt(i - 1) == '\\') {
if ((i > 0) && (text.charAt(i - 1) == '\\')) {
charBeforeIsEscape = true;
}

if (!charBeforeIsEscape && item == '{') {
if (!charBeforeIsEscape && (item == '{')) {
left++;
} else if (!charBeforeIsEscape && item == '}') {
} else if (!charBeforeIsEscape && (item == '}')) {
right++;
}
}

// Then we throw an exception if the error criteria are met.
if (!(right == 0) && (left == 0)) {
throw new InvalidFieldValueException("Unescaped '}' character without opening bracket ends string prematurely.");
throw new InvalidFieldValueException("Unescaped '}' character without opening bracket ends string prematurely. Field value: " + text);
}
if (!(right == 0) && (right < left)) {
throw new InvalidFieldValueException("Unescaped '}' character without opening bracket ends string prematurely.");
throw new InvalidFieldValueException("Unescaped '}' character without opening bracket ends string prematurely. Field value: " + text);
}
if (left != right) {
throw new InvalidFieldValueException("Braces don't match.");
throw new InvalidFieldValueException("Braces don't match. Field value: " + text);
}
}

Expand Down Expand Up @@ -146,9 +145,9 @@ private String formatAndResolveStrings(String content, String fieldName) throws
pos1 = content.length(); // just write out the rest of the text, and throw no exception
} else {
throw new InvalidFieldValueException(
"The # character is not allowed in BibTeX strings unless escaped as in '\\#'.\n"
+ "In JabRef, use pairs of # characters to indicate a string.\n"
+ "Note that the entry causing the problem has been selected.");
"The # character is not allowed in BibTeX strings unless escaped as in '\\#'.\n"
+ "In JabRef, use pairs of # characters to indicate a string.\n"
+ "Note that the entry causing the problem has been selected. Field value: " + content);
}
}
}
Expand All @@ -161,7 +160,7 @@ private String formatAndResolveStrings(String content, String fieldName) throws
// an occurrence of ## will simply be ignored. Should it instead
// cause an error message?
writeStringLabel(content, pos1 + 1, pos2, pos1 == pivot,
(pos2 + 1) == content.length());
(pos2 + 1) == content.length());
}

if (pos2 > -1) {
Expand All @@ -187,16 +186,15 @@ private boolean shouldResolveStrings(String fieldName) {
} else {
// Default operation - we only resolve strings for standard fields:
resolveStrings = InternalBibtexFields.isStandardField(fieldName)
|| BIBTEX_STRING.equals(fieldName);
|| BIBTEX_STRING.equals(fieldName);
}
return resolveStrings;
}

private String formatWithoutResolvingStrings(String content, String fieldName) throws InvalidFieldValueException {
checkBraces(content);

stringBuilder = new StringBuilder(
String.valueOf(FIELD_START));
stringBuilder = new StringBuilder(String.valueOf(FIELD_START));

stringBuilder.append(parser.format(content, fieldName));

Expand Down Expand Up @@ -258,7 +256,7 @@ private void writeText(String text, int startPos, int endPos) {
// We add a backslash before any ampersand characters, with one exception: if
// we are inside an \\url{...} command, we should write it as it is. Maybe.
if ((c == '&') && !escape && !(inCommand && "url".equals(commandName.toString()))
&& (nestedEnvironments == 0)) {
&& (nestedEnvironments == 0)) {
stringBuilder.append("\\&");
} else {
stringBuilder.append(c);
Expand All @@ -271,7 +269,7 @@ private void writeText(String text, int startPos, int endPos) {
private void writeStringLabel(String text, int startPos, int endPos,
boolean first, boolean last) {
putIn((first ? "" : " # ") + text.substring(startPos, endPos)
+ (last ? "" : " # "));
+ (last ? "" : " # "));
}

private void putIn(String s) {
Expand Down