private void shiftOffsets(int shift, int changeOffset) {
for (int i = myWrappers.size() - 1; i >= 0; i--) {
ArrangementEntryWrapper<E> wrapper = myWrappers.get(i);
if (wrapper.getStartOffset() < changeOffset) {
break;
}
wrapper.applyShift(shift);
}
}
@Override
public void prepare(
@NotNull List<ArrangementEntryWrapper<E>> toArrange, @NotNull Context<E> context) {
myWrappers.clear();
myWrappers.addAll(toArrange);
for (ArrangementEntryWrapper<E> wrapper : toArrange) {
wrapper.updateBlankLines(myDocument);
}
}
@Override
public void prepare(
@NotNull List<ArrangementEntryWrapper<E>> toArrange, @NotNull Context<E> context) {
ArrangementEntryWrapper<E> parent = toArrange.get(0).getParent();
if (parent == null) {
myParentText = context.document.getText();
myParentShift = 0;
} else {
myParentText =
context
.document
.getCharsSequence()
.subSequence(parent.getStartOffset(), parent.getEndOffset())
.toString();
myParentShift = parent.getStartOffset();
}
}
@SuppressWarnings("unchecked")
private static <E extends ArrangementEntry> void doArrange(
@NotNull List<ArrangementEntryWrapper<E>> wrappers, @NotNull Context<E> context) {
if (wrappers.isEmpty()) {
return;
}
Map<E, ArrangementEntryWrapper<E>> map = ContainerUtilRt.newHashMap();
List<E> arranged = ContainerUtilRt.newArrayList();
List<E> toArrange = ContainerUtilRt.newArrayList();
for (ArrangementEntryWrapper<E> wrapper : wrappers) {
E entry = wrapper.getEntry();
map.put(wrapper.getEntry(), wrapper);
if (!entry.canBeMatched()) {
// Split entries to arrange by 'can not be matched' rules.
// See IDEA-104046 for a problem use-case example.
if (toArrange.isEmpty()) {
arranged.addAll(arrange(toArrange, context.rules, context.rulesByPriority));
}
arranged.add(entry);
toArrange.clear();
} else {
toArrange.add(entry);
}
}
if (!toArrange.isEmpty()) {
arranged.addAll(arrange(toArrange, context.rules, context.rulesByPriority));
}
context.changer.prepare(wrappers, context);
// We apply changes from the last position to the first position in order not to bother with
// offsets shifts.
for (int i = arranged.size() - 1; i >= 0; i--) {
ArrangementEntryWrapper<E> arrangedWrapper = map.get(arranged.get(i));
ArrangementEntryWrapper<E> initialWrapper = wrappers.get(i);
context.changer.replace(
arrangedWrapper, initialWrapper, i > 0 ? map.get(arranged.get(i - 1)) : null, context);
}
}
public static <T extends ArrangementEntry> Context<T> from(
@NotNull Rearranger<T> rearranger,
@NotNull Document document,
@NotNull PsiElement root,
@NotNull Collection<TextRange> ranges,
@NotNull ArrangementSettings arrangementSettings,
@NotNull CodeStyleSettings codeStyleSettings) {
Collection<T> entries = rearranger.parse(root, document, ranges, arrangementSettings);
Collection<ArrangementEntryWrapper<T>> wrappers = new ArrayList<ArrangementEntryWrapper<T>>();
ArrangementEntryWrapper<T> previous = null;
for (T entry : entries) {
ArrangementEntryWrapper<T> wrapper = new ArrangementEntryWrapper<T>(entry);
if (previous != null) {
previous.setNext(wrapper);
wrapper.setPrevious(previous);
}
wrappers.add(wrapper);
previous = wrapper;
}
Changer changer;
if (document instanceof DocumentEx) {
changer = new RangeMarkerAwareChanger<T>((DocumentEx) document);
} else {
changer = new DefaultChanger();
}
final List<? extends ArrangementMatchRule> rulesByPriority =
ArrangementUtil.getRulesSortedByPriority(arrangementSettings);
return new Context<T>(
rearranger,
wrappers,
document,
arrangementSettings.getRules(),
rulesByPriority,
codeStyleSettings,
changer);
}
@SuppressWarnings("AssignmentToForLoopParameter")
@Override
public void replace(
@NotNull ArrangementEntryWrapper<E> newWrapper,
@NotNull ArrangementEntryWrapper<E> oldWrapper,
@Nullable ArrangementEntryWrapper<E> previous,
@NotNull Context<E> context) {
// Calculate blank lines before the arrangement.
int blankLinesBefore = oldWrapper.getBlankLinesBefore();
ArrangementEntryWrapper<E> parentWrapper = oldWrapper.getParent();
int desiredBlankLinesNumber =
context.rearranger.getBlankLines(
context.settings,
parentWrapper == null ? null : parentWrapper.getEntry(),
previous == null ? null : previous.getEntry(),
newWrapper.getEntry());
if ((desiredBlankLinesNumber < 0 || desiredBlankLinesNumber == blankLinesBefore)
&& newWrapper.equals(oldWrapper)) {
return;
}
int lineFeedsDiff = desiredBlankLinesNumber - blankLinesBefore;
int insertionOffset = oldWrapper.getStartOffset();
if (oldWrapper.getStartOffset() > newWrapper.getStartOffset()) {
insertionOffset -= newWrapper.getEndOffset() - newWrapper.getStartOffset();
}
if (newWrapper.getStartOffset() != oldWrapper.getStartOffset()
|| !newWrapper.equals(oldWrapper)) {
context.addMoveInfo(
newWrapper.getStartOffset(), newWrapper.getEndOffset(), oldWrapper.getStartOffset());
myDocument.moveText(
newWrapper.getStartOffset(), newWrapper.getEndOffset(), oldWrapper.getStartOffset());
for (int i = myWrappers.size() - 1; i >= 0; i--) {
ArrangementEntryWrapper<E> w = myWrappers.get(i);
if (w == newWrapper) {
continue;
}
if (w.getStartOffset() >= oldWrapper.getStartOffset()
&& w.getStartOffset() < newWrapper.getStartOffset()) {
w.applyShift(newWrapper.getEndOffset() - newWrapper.getStartOffset());
} else if (w.getStartOffset() < oldWrapper.getStartOffset()
&& w.getStartOffset() > newWrapper.getStartOffset()) {
w.applyShift(newWrapper.getStartOffset() - newWrapper.getEndOffset());
}
}
}
if (desiredBlankLinesNumber >= 0 && lineFeedsDiff > 0) {
myDocument.insertString(insertionOffset, StringUtil.repeat("\n", lineFeedsDiff));
shiftOffsets(lineFeedsDiff, insertionOffset);
}
if (desiredBlankLinesNumber >= 0 && lineFeedsDiff < 0) {
// Cut exceeding blank lines.
int replacementStartOffset = getBlankLineOffset(-lineFeedsDiff, insertionOffset);
myDocument.deleteString(replacementStartOffset, insertionOffset);
shiftOffsets(replacementStartOffset - insertionOffset, insertionOffset);
}
// Update wrapper ranges.
if (desiredBlankLinesNumber < 0 || lineFeedsDiff == 0 || parentWrapper == null) {
return;
}
Deque<ArrangementEntryWrapper<E>> parents = new ArrayDeque<ArrangementEntryWrapper<E>>();
do {
parents.add(parentWrapper);
parentWrapper.setEndOffset(parentWrapper.getEndOffset() + lineFeedsDiff);
parentWrapper = parentWrapper.getParent();
} while (parentWrapper != null);
while (!parents.isEmpty()) {
for (ArrangementEntryWrapper<E> wrapper = parents.removeLast().getNext();
wrapper != null;
wrapper = wrapper.getNext()) {
wrapper.applyShift(lineFeedsDiff);
}
}
}
@SuppressWarnings("AssignmentToForLoopParameter")
@Override
public void replace(
@NotNull ArrangementEntryWrapper<E> newWrapper,
@NotNull ArrangementEntryWrapper<E> oldWrapper,
@Nullable ArrangementEntryWrapper<E> previous,
@NotNull Context<E> context) {
// Calculate blank lines before the arrangement.
int blankLinesBefore = 0;
TIntArrayList lineFeedOffsets = new TIntArrayList();
int oldStartLine = context.document.getLineNumber(oldWrapper.getStartOffset());
if (oldStartLine > 0) {
int lastLineFeed = context.document.getLineStartOffset(oldStartLine) - 1;
lineFeedOffsets.add(lastLineFeed);
for (int i = lastLineFeed - 1 - myParentShift; i >= 0; i--) {
i = CharArrayUtil.shiftBackward(myParentText, i, " \t");
if (myParentText.charAt(i) == '\n') {
blankLinesBefore++;
lineFeedOffsets.add(i + myParentShift);
} else {
break;
}
}
}
ArrangementEntryWrapper<E> parentWrapper = oldWrapper.getParent();
int desiredBlankLinesNumber =
context.rearranger.getBlankLines(
context.settings,
parentWrapper == null ? null : parentWrapper.getEntry(),
previous == null ? null : previous.getEntry(),
newWrapper.getEntry());
if (desiredBlankLinesNumber == blankLinesBefore && newWrapper.equals(oldWrapper)) {
return;
}
String newEntryText =
myParentText.substring(
newWrapper.getStartOffset() - myParentShift,
newWrapper.getEndOffset() - myParentShift);
int lineFeedsDiff = desiredBlankLinesNumber - blankLinesBefore;
if (lineFeedsDiff == 0 || desiredBlankLinesNumber < 0) {
context.addMoveInfo(
newWrapper.getStartOffset() - myParentShift,
newWrapper.getEndOffset() - myParentShift,
oldWrapper.getStartOffset());
context.document.replaceString(
oldWrapper.getStartOffset(), oldWrapper.getEndOffset(), newEntryText);
return;
}
if (lineFeedsDiff > 0) {
// Insert necessary number of blank lines.
StringBuilder buffer = new StringBuilder(StringUtil.repeat("\n", lineFeedsDiff));
buffer.append(newEntryText);
context.document.replaceString(
oldWrapper.getStartOffset(), oldWrapper.getEndOffset(), buffer);
} else {
// Cut exceeding blank lines.
int replacementStartOffset = lineFeedOffsets.get(-lineFeedsDiff) + 1;
context.document.replaceString(
replacementStartOffset, oldWrapper.getEndOffset(), newEntryText);
}
// Update wrapper ranges.
ArrangementEntryWrapper<E> parent = oldWrapper.getParent();
if (parent == null) {
return;
}
Deque<ArrangementEntryWrapper<E>> parents = new ArrayDeque<ArrangementEntryWrapper<E>>();
do {
parents.add(parent);
parent.setEndOffset(parent.getEndOffset() + lineFeedsDiff);
parent = parent.getParent();
} while (parent != null);
while (!parents.isEmpty()) {
for (ArrangementEntryWrapper<E> wrapper = parents.removeLast().getNext();
wrapper != null;
wrapper = wrapper.getNext()) {
wrapper.applyShift(lineFeedsDiff);
}
}
}
@SuppressWarnings("unchecked")
private static <E extends ArrangementEntry> void doArrange(Context<E> context) {
// The general idea is to process entries bottom-up where every processed group belongs to the
// same parent. We may not bother
// with entries text ranges then. We use a list and a stack for achieving that than.
//
// Example:
// Entry1 Entry2
// / \ / \
// Entry11 Entry12 Entry21 Entry22
//
// --------------------------
// Stage 1:
// list: Entry1 Entry2 <-- entries to process
// stack: [0, 0, 2] <-- holds current iteration info at the following format:
// (start entry index at the auxiliary list (inclusive); current
// index; end index (exclusive))
// --------------------------
// Stage 2:
// list: Entry1 Entry2 Entry11 Entry12
// stack: [0, 1, 2]
// [2, 2, 4]
// --------------------------
// Stage 3:
// list: Entry1 Entry2 Entry11 Entry12
// stack: [0, 1, 2]
// [2, 3, 4]
// --------------------------
// Stage 4:
// list: Entry1 Entry2 Entry11 Entry12
// stack: [0, 1, 2]
// [2, 4, 4]
// --------------------------
// arrange 'Entry11 Entry12'
// --------------------------
// Stage 5:
// list: Entry1 Entry2
// stack: [0, 1, 2]
// --------------------------
// Stage 6:
// list: Entry1 Entry2 Entry21 Entry22
// stack: [0, 2, 2]
// [2, 2, 4]
// --------------------------
// Stage 7:
// list: Entry1 Entry2 Entry21 Entry22
// stack: [0, 2, 2]
// [2, 3, 4]
// --------------------------
// Stage 8:
// list: Entry1 Entry2 Entry21 Entry22
// stack: [0, 2, 2]
// [2, 4, 4]
// --------------------------
// arrange 'Entry21 Entry22'
// --------------------------
// Stage 9:
// list: Entry1 Entry2
// stack: [0, 2, 2]
// --------------------------
// arrange 'Entry1 Entry2'
List<ArrangementEntryWrapper<E>> entries = new ArrayList<ArrangementEntryWrapper<E>>();
Stack<StackEntry> stack = new Stack<StackEntry>();
entries.addAll(context.wrappers);
stack.push(new StackEntry(0, context.wrappers.size()));
while (!stack.isEmpty()) {
StackEntry stackEntry = stack.peek();
if (stackEntry.current >= stackEntry.end) {
List<ArrangementEntryWrapper<E>> subEntries =
entries.subList(stackEntry.start, stackEntry.end);
if (subEntries.size() > 1) {
doArrange(subEntries, context);
}
subEntries.clear();
stack.pop();
} else {
ArrangementEntryWrapper<E> wrapper = entries.get(stackEntry.current++);
List<ArrangementEntryWrapper<E>> children = wrapper.getChildren();
if (!children.isEmpty()) {
entries.addAll(children);
stack.push(new StackEntry(stackEntry.end, children.size()));
}
}
}
}
