@Restrict("#{s:hasPermission('Node', 'edit', documentHistory.currentFile)}")
public String rollback() {
statusMessages.addFromResourceBundleOrDefault(
INFO,
"lacewiki.msg.RollingBackDocument",
"Rolling document back to revision {0}",
selectedHistoricalFile.getRevision());
return "rollback";
}
public void displayHistoricalRevision() {
log.debug("displaying historical file id: " + selectedHistoricalFile.getHistoricalFileId());
displayedHistoricalFile = selectedHistoricalFile;
diffResult = null;
statusMessages.addFromResourceBundleOrDefault(
INFO,
"lacewiki.msg.DiffOldVersionDisplayed",
"Showing historical revision {0}",
selectedHistoricalFile.getRevision());
}
// This methods takes the historicalFileId parameter to load a revision from the DB
public void diff() {
init(); // TODO: Why doesn't Seam execute my page action but instead s:link action="diff" in a
// fake RENDER RESPONSE?!?
displayedHistoricalFile = null;
if (historicalFileId == null) return;
selectedHistoricalFile =
wikiNodeDAO.findHistoricalFile(
getCurrentFile().getHistoricalEntityName(), historicalFileId);
if (selectedHistoricalFile == null) {
statusMessages.addFromResourceBundleOrDefault(
ERROR,
"lacewiki.msg.HistoricalNodeNotFound",
"Couldn't find historical node: {0}",
historicalFileId);
return;
}
diffHistoricalRevision();
}
public void diffHistoricalRevision() {
log.debug("diffing historical file id: " + selectedHistoricalFile.getHistoricalFileId());
String[] a = ((WikiDocument) selectedHistoricalFile).getContent().split("\n");
String[] b = ((WikiDocument) currentFile).getContent().split("\n");
StringBuilder result = new StringBuilder();
List<Diff.Difference> differences = new Diff(a, b).diff();
// TODO: Externalize and i18n these strings
for (Diff.Difference diff : differences) {
int delStart = diff.getDeletedStart();
int delEnd = diff.getDeletedEnd();
int addStart = diff.getAddedStart();
int addEnd = diff.getAddedEnd();
String type =
delEnd != Diff.NONE && addEnd != Diff.NONE
? "changed"
: (delEnd == Diff.NONE ? "added" : "deleted");
// Info line
result.append("<div class=\"diffInfo\">");
result.append("From ");
result.append(delStart == delEnd || delEnd == Diff.NONE ? "line" : "lines");
result.append(" ");
result.append(delStart);
if (delEnd != Diff.NONE && delStart != delEnd) {
result.append(" to ").append(delEnd);
}
result.append(" ").append(type).append(" to ");
result.append(addStart == addEnd || addEnd == Diff.NONE ? "line" : "lines");
result.append(" ");
result.append(addStart);
if (addEnd != Diff.NONE && addStart != addEnd) {
result.append(" to ").append(addEnd);
}
result.append(":");
result.append("</div>\n");
if (delEnd != Diff.NONE) {
result.append("<div class=\"diffDeleted\">");
for (int lnum = delStart; lnum <= delEnd; ++lnum) {
result.append(WikiUtil.escapeHtml(a[lnum], false, false)).append("<br/>");
}
result.append("</div>");
if (addEnd != Diff.NONE) {
// result.append("----------------------------").append("\n");
}
}
if (addEnd != Diff.NONE) {
result.append("<div class=\"diffAdded\">");
for (int lnum = addStart; lnum <= addEnd; ++lnum) {
result.append(WikiUtil.escapeHtml(b[lnum], false, false)).append("<br/>");
}
result.append("</div>");
}
}
diffResult = result.toString();
statusMessages.addFromResourceBundleOrDefault(
INFO,
"lacewiki.msg.DiffCreated",
"Comparing current revision with historical revision {0}",
selectedHistoricalFile.getRevision());
}