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fixes #63 
1 parent dbd0b8f commit df01ef6

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2 files changed

+72
-23
lines changed

2 files changed

+72
-23
lines changed

‎java-diff-utils/src/main/java/com/github/difflib/text/DiffRowGenerator.java

Lines changed: 53 additions & 23 deletions
Original file line numberDiff line numberDiff line change
@@ -107,7 +107,8 @@ protected final static List<String> splitStringPreserveDelimiter(String str, Pat
107107
* @param tagGenerator the tag generator
108108
*/
109109
static void wrapInTag(List<String> sequence, int startPosition,
110-
int endPosition, Function<Boolean, String> tagGenerator) {
110+
int endPosition, Function<Boolean, String> tagGenerator,
111+
Function<String, String> processDiffs) {
111112
int endPos = endPosition;
112113

113114
while (endPos >= startPosition) {
@@ -125,23 +126,30 @@ static void wrapInTag(List<String> sequence, int startPosition,
125126
}
126127

127128
sequence.add(endPos, tagGenerator.apply(false));
129+
if (processDiffs != null) {
130+
sequence.set(endPos - 1,
131+
processDiffs.apply(sequence.get(endPos - 1)));
132+
}
128133
endPos--;
129134

130135
//search position for end tag
131136
while (endPos > startPosition) {
132137
if ("\n".equals(sequence.get(endPos - 1))) {
133138
break;
134139
}
140+
if (processDiffs != null) {
141+
sequence.set(endPos - 1,
142+
processDiffs.apply(sequence.get(endPos - 1)));
143+
}
135144
endPos--;
136145
}
137146

138147
sequence.add(endPos, tagGenerator.apply(true));
139148
endPos--;
140149
}
141-
142-
// sequence.add(endPosition, tagGenerator.apply(false));
143-
// sequence.add(startPosition, tagGenerator.apply(true));
144150
}
151+
152+
145153
private final int columnWidth;
146154
private final BiPredicate<String, String> equalizer;
147155
private final boolean ignoreWhiteSpaces;
@@ -151,6 +159,7 @@ static void wrapInTag(List<String> sequence, int startPosition,
151159
private final Function<Boolean, String> oldTag;
152160
private final boolean reportLinesUnchanged;
153161
private final Function<String, String> lineNormalizer;
162+
private final Function<String, String> processDiffs;
154163

155164
private final boolean showInlineDiffs;
156165

@@ -165,6 +174,7 @@ private DiffRowGenerator(Builder builder) {
165174
equalizer = ignoreWhiteSpaces ? IGNORE_WHITESPACE_EQUALIZER : DEFAULT_EQUALIZER;
166175
reportLinesUnchanged = builder.reportLinesUnchanged;
167176
lineNormalizer = builder.lineNormalizer;
177+
processDiffs = builder.processDiffs;
168178

169179
Objects.requireNonNull(inlineDiffSplitter);
170180
Objects.requireNonNull(lineNormalizer);
@@ -178,7 +188,8 @@ private DiffRowGenerator(Builder builder) {
178188
* @param revised the revised text
179189
* @return the DiffRows between original and revised texts
180190
*/
181-
public List<DiffRow> generateDiffRows(List<String> original, List<String> revised) throws DiffException {
191+
public List<DiffRow> generateDiffRows(List<String> original, List<String> revised)
192+
throws DiffException {
182193
return generateDiffRows(original, DiffUtils.diff(original, revised, equalizer));
183194
}
184195

@@ -190,7 +201,8 @@ public List<DiffRow> generateDiffRows(List<String> original, List<String> revise
190201
* @param patch the given patch
191202
* @return the DiffRows between original and revised texts
192203
*/
193-
public List<DiffRow> generateDiffRows(final List<String> original, Patch<String> patch) throws DiffException {
204+
public List<DiffRow> generateDiffRows(final List<String> original, Patch<String> patch)
205+
throws DiffException {
194206
List<DiffRow> diffRows = new ArrayList<>();
195207
int endPos = 0;
196208
final List<AbstractDelta<String>> deltaList = patch.getDeltas();
@@ -280,7 +292,8 @@ List<String> normalizeLines(List<String> list) {
280292
*
281293
* @param delta the given delta
282294
*/
283-
private List<DiffRow> generateInlineDiffs(AbstractDelta<String> delta) throws DiffException {
295+
private List<DiffRow> generateInlineDiffs(AbstractDelta<String> delta)
296+
throws DiffException {
284297
List<String> orig = normalizeLines(delta.getSource().getLines());
285298
List<String> rev = normalizeLines(delta.getTarget().getLines());
286299
List<String> origList;
@@ -300,32 +313,36 @@ private List<DiffRow> generateInlineDiffs(AbstractDelta<String> delta) throws Di
300313
if (inlineDelta instanceof DeleteDelta) {
301314
wrapInTag(origList, inlineOrig.getPosition(), inlineOrig
302315
.getPosition()
303-
+ inlineOrig.size(), oldTag);
316+
+ inlineOrig.size(), oldTag, processDiffs);
304317
} else if (inlineDelta instanceof InsertDelta) {
305318
if (mergeOriginalRevised) {
306319
origList.addAll(inlineOrig.getPosition(),
307-
revList.subList(inlineRev.getPosition(), inlineRev.getPosition()
308-
+ inlineRev.size()));
309-
wrapInTag(origList, inlineOrig.getPosition(), inlineOrig.getPosition()
310-
+ inlineRev.size(), newTag);
320+
revList.subList(inlineRev.getPosition(),
321+
inlineRev.getPosition() + inlineRev.size()));
322+
wrapInTag(origList, inlineOrig.getPosition(),
323+
inlineOrig.getPosition() + inlineRev.size(),
324+
newTag, processDiffs);
311325
} else {
312-
wrapInTag(revList, inlineRev.getPosition(), inlineRev.getPosition()
313-
+ inlineRev.size(), newTag);
326+
wrapInTag(revList, inlineRev.getPosition(),
327+
inlineRev.getPosition() + inlineRev.size(),
328+
newTag, processDiffs);
314329
}
315330
} else if (inlineDelta instanceof ChangeDelta) {
316331
if (mergeOriginalRevised) {
317332
origList.addAll(inlineOrig.getPosition() + inlineOrig.size(),
318-
revList.subList(inlineRev.getPosition(), inlineRev.getPosition()
319-
+ inlineRev.size()));
320-
wrapInTag(origList, inlineOrig.getPosition() + inlineOrig.size(), inlineOrig.getPosition() + inlineOrig.size()
321-
+ inlineRev.size(), newTag);
333+
revList.subList(inlineRev.getPosition(),
334+
inlineRev.getPosition() + inlineRev.size()));
335+
wrapInTag(origList, inlineOrig.getPosition() + inlineOrig.size(),
336+
inlineOrig.getPosition() + inlineOrig.size() + inlineRev.size(),
337+
newTag, processDiffs);
322338
} else {
323-
wrapInTag(revList, inlineRev.getPosition(), inlineRev.getPosition()
324-
+ inlineRev.size(), newTag);
339+
wrapInTag(revList, inlineRev.getPosition(),
340+
inlineRev.getPosition() + inlineRev.size(),
341+
newTag, processDiffs);
325342
}
326-
wrapInTag(origList, inlineOrig.getPosition(), inlineOrig
327-
.getPosition()
328-
+ inlineOrig.size(), oldTag);
343+
wrapInTag(origList, inlineOrig.getPosition(),
344+
inlineOrig.getPosition() + inlineOrig.size(),
345+
oldTag, processDiffs);
329346
}
330347
}
331348
StringBuilder origResult = new StringBuilder();
@@ -376,6 +393,7 @@ public static class Builder {
376393
private boolean reportLinesUnchanged = false;
377394
private Function<String, List<String>> inlineDiffSplitter = SPLITTER_BY_CHARACTER;
378395
private Function<String, String> lineNormalizer = LINE_NORMALIZER_FOR_HTML;
396+
private Function<String, String> processDiffs = null;
379397

380398
private Builder() {
381399
}
@@ -436,6 +454,18 @@ public Builder newTag(Function<Boolean, String> generator) {
436454
return this;
437455
}
438456

457+
/**
458+
* Processor for diffed text parts. Here e.g. whitecharacters could be replaced by something
459+
* visible.
460+
*
461+
* @param processDiffs
462+
* @return
463+
*/
464+
public Builder processDiffs(Function<String, String> processDiffs) {
465+
this.processDiffs = processDiffs;
466+
return this;
467+
}
468+
439469
/**
440470
* Set the column width of generated lines of original and revised texts.
441471
*

‎java-diff-utils/src/test/java/com/github/difflib/text/DiffRowGeneratorTest.java

Lines changed: 19 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -480,4 +480,23 @@ public void testIgnoreWhitespaceIssue64() throws DiffException {
480480
"",
481481
"~testline~**another one**");
482482
}
483+
484+
@Test
485+
public void testIgnoreWhitespaceIssue63() throws DiffException {
486+
DiffRowGenerator generator = DiffRowGenerator.create()
487+
.showInlineDiffs(true)
488+
.inlineDiffByWord(true)
489+
.mergeOriginalRevised(true)
490+
.oldTag(f -> "~") //introduce markdown style for strikethrough
491+
.newTag(f -> "**") //introduce markdown style for bold
492+
.processDiffs(str -> str.replace(" ", "/"))
493+
.build();
494+
495+
//compute the differences for two test texts.
496+
List<DiffRow> rows = generator.generateDiffRows(
497+
Arrays.asList("This is a test."),
498+
Arrays.asList("This is a test"));
499+
500+
assertEquals("This~//~**/**is~//~**/**a~//~**/**test~.~", rows.get(0).getOldLine());
501+
}
483502
}

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