@Override
public void run(boolean softWrapAware) {
if (!softWrapAware) {
return;
}
try {
for (FoldRegionInfo info : myDeferredFoldRegions) {
// There is a possible case that given fold region is contained inside another collapsed
// fold region. We don't want to process
// such nested region then.
FoldRegion outerRegion =
myEditor.getFoldingModel().getCollapsedRegionAtOffset(info.start);
if (outerRegion != null
&& outerRegion != info.region
&& outerRegion.getStartOffset() <= info.start
&& outerRegion.getEndOffset() >= info.end) {
continue;
}
for (SoftWrapFoldingListener listener : myFoldListeners) {
listener.onFoldRegionStateChange(info.start, info.end);
}
}
} finally {
myDeferredFoldRegions.clear();
}
for (SoftWrapFoldingListener listener : myFoldListeners) {
listener.onFoldProcessingEnd();
}
}
@Override
public void onFoldRegionStateChange(@NotNull FoldRegion region) {
if (myDocument.isInBulkUpdate()) return;
if (region.isValid()) {
myFoldingChangeStartOffset = Math.min(myFoldingChangeStartOffset, region.getStartOffset());
myFoldingChangeEndOffset = Math.max(myFoldingChangeEndOffset, region.getEndOffset());
}
}
public int getEndOffset(@NotNull FoldingGroup group) {
final List<FoldRegion> regions = getGroupedRegions(group);
int endOffset = 0;
for (FoldRegion region : regions) {
if (region.isValid()) {
endOffset = Math.max(endOffset, region.getEndOffset());
}
}
return endOffset;
}
private static boolean isSelected(FoldRegion foldRegion) {
int regionStart = foldRegion.getStartOffset();
int regionEnd = foldRegion.getEndOffset();
int[] selectionStarts = foldRegion.getEditor().getSelectionModel().getBlockSelectionStarts();
int[] selectionEnds = foldRegion.getEditor().getSelectionModel().getBlockSelectionEnds();
for (int i = 0; i < selectionStarts.length; i++) {
int start = selectionStarts[i];
int end = selectionEnds[i];
if (regionStart >= start && regionEnd <= end) return true;
}
return false;
}
@Override
public void onFoldRegionStateChange(@NotNull FoldRegion region) {
myUpdateInProgress = true;
if (!isSoftWrappingEnabled() || !region.isValid()) {
myDirty = true;
return;
}
// We delay processing of changed fold regions till the invocation of onFoldProcessingEnd(), as
// FoldingModel can return inconsistent data before that moment.
myDeferredFoldRegions.add(new TextRange(region.getStartOffset(), region.getEndOffset()));
}
@Override
@SuppressWarnings({"AssignmentToForLoopParameter"})
public void paint(
@NotNull Editor editor, @NotNull RangeHighlighter highlighter, @NotNull Graphics g) {
int startOffset = highlighter.getStartOffset();
final Document doc = highlighter.getDocument();
if (startOffset >= doc.getTextLength()) return;
final int endOffset = highlighter.getEndOffset();
final int endLine = doc.getLineNumber(endOffset);
int off;
int startLine = doc.getLineNumber(startOffset);
IndentGuideDescriptor descriptor =
editor.getIndentsModel().getDescriptor(startLine, endLine);
final CharSequence chars = doc.getCharsSequence();
do {
int start = doc.getLineStartOffset(startLine);
int end = doc.getLineEndOffset(startLine);
off = CharArrayUtil.shiftForward(chars, start, end, " \t");
startLine--;
} while (startLine > 1 && off < doc.getTextLength() && chars.charAt(off) == '\n');
final VisualPosition startPosition = editor.offsetToVisualPosition(off);
int indentColumn = startPosition.column;
// It's considered that indent guide can cross not only white space but comments, javadocs
// etc. Hence, there is a possible
// case that the first indent guide line is, say, single-line comment where comment
// symbols ('//') are located at the first
// visual column. We need to calculate correct indent guide column then.
int lineShift = 1;
if (indentColumn <= 0 && descriptor != null) {
indentColumn = descriptor.indentLevel;
lineShift = 0;
}
if (indentColumn <= 0) return;
final FoldingModel foldingModel = editor.getFoldingModel();
if (foldingModel.isOffsetCollapsed(off)) return;
final FoldRegion headerRegion =
foldingModel.getCollapsedRegionAtOffset(doc.getLineEndOffset(doc.getLineNumber(off)));
final FoldRegion tailRegion =
foldingModel.getCollapsedRegionAtOffset(
doc.getLineStartOffset(doc.getLineNumber(endOffset)));
if (tailRegion != null && tailRegion == headerRegion) return;
final boolean selected;
final IndentGuideDescriptor guide = editor.getIndentsModel().getCaretIndentGuide();
if (guide != null) {
final CaretModel caretModel = editor.getCaretModel();
final int caretOffset = caretModel.getOffset();
selected =
caretOffset >= off
&& caretOffset < endOffset
&& caretModel.getLogicalPosition().column == indentColumn;
} else {
selected = false;
}
Point start =
editor.visualPositionToXY(
new VisualPosition(startPosition.line + lineShift, indentColumn));
final VisualPosition endPosition = editor.offsetToVisualPosition(endOffset);
Point end =
editor.visualPositionToXY(new VisualPosition(endPosition.line, endPosition.column));
int maxY = end.y;
if (endPosition.line == editor.offsetToVisualPosition(doc.getTextLength()).line) {
maxY += editor.getLineHeight();
}
Rectangle clip = g.getClipBounds();
if (clip != null) {
if (clip.y >= maxY || clip.y + clip.height <= start.y) {
return;
}
maxY = Math.min(maxY, clip.y + clip.height);
}
final EditorColorsScheme scheme = editor.getColorsScheme();
g.setColor(
selected
? scheme.getColor(EditorColors.SELECTED_INDENT_GUIDE_COLOR)
: scheme.getColor(EditorColors.INDENT_GUIDE_COLOR));
// There is a possible case that indent line intersects soft wrap-introduced text.
// Example:
// this is a long line <soft-wrap>
// that| is soft-wrapped
// |
// | <- vertical indent
//
// Also it's possible that no additional intersections are added because of soft wrap:
// this is a long line <soft-wrap>
// | that is soft-wrapped
// |
// | <- vertical indent
// We want to use the following approach then:
// 1. Show only active indent if it crosses soft wrap-introduced text;
// 2. Show indent as is if it doesn't intersect with soft wrap-introduced text;
if (selected) {
g.drawLine(start.x + 2, start.y, start.x + 2, maxY);
} else {
int y = start.y;
int newY = start.y;
SoftWrapModel softWrapModel = editor.getSoftWrapModel();
int lineHeight = editor.getLineHeight();
for (int i = Math.max(0, startLine + lineShift); i < endLine && newY < maxY; i++) {
List<? extends SoftWrap> softWraps = softWrapModel.getSoftWrapsForLine(i);
int logicalLineHeight = softWraps.size() * lineHeight;
if (i > startLine + lineShift) {
logicalLineHeight +=
lineHeight; // We assume that initial 'y' value points just below the target
// line.
}
if (!softWraps.isEmpty() && softWraps.get(0).getIndentInColumns() < indentColumn) {
if (y < newY
|| i
> startLine
+ lineShift) { // There is a possible case that soft wrap is located on
// indent start line.
g.drawLine(start.x + 2, y, start.x + 2, newY + lineHeight);
}
newY += logicalLineHeight;
y = newY;
} else {
newY += logicalLineHeight;
}
FoldRegion foldRegion =
foldingModel.getCollapsedRegionAtOffset(doc.getLineEndOffset(i));
if (foldRegion != null && foldRegion.getEndOffset() < doc.getTextLength()) {
i = doc.getLineNumber(foldRegion.getEndOffset());
}
}
if (y < maxY) {
g.drawLine(start.x + 2, y, start.x + 2, maxY);
}
}
}
FoldRegionInfo(@NotNull FoldRegion region) {
this.region = region;
start = region.getStartOffset();
end = region.getEndOffset();
}