private void paintWhitespace(
Graphics2D g,
CharSequence text,
float x,
int y,
int start,
int end,
EditorImpl.LineWhitespacePaintingStrategy whitespacePaintingStrategy,
VisualLineFragmentsIterator.Fragment fragment) {
g.setColor(myEditor.getColorsScheme().getColor(EditorColors.WHITESPACES_COLOR));
boolean isRtl = fragment.isRtl();
int baseStartOffset = fragment.getStartOffset();
int startOffset = isRtl ? baseStartOffset - start : baseStartOffset + start;
for (int i = start; i < end; i++) {
int charOffset = isRtl ? baseStartOffset - i - 1 : baseStartOffset + i;
char c = text.charAt(charOffset);
if (" \t\u3000".indexOf(c) >= 0
&& whitespacePaintingStrategy.showWhitespaceAtOffset(charOffset)) {
int startX =
(int)
fragment.offsetToX(
x, startOffset, isRtl ? baseStartOffset - i : baseStartOffset + i);
int endX =
(int)
fragment.offsetToX(
x, startOffset, isRtl ? baseStartOffset - i - 1 : baseStartOffset + i + 1);
if (c == ' ') {
g.fillRect((startX + endX) / 2, y, 1, 1);
} else if (c == '\t') {
endX -= myView.getPlainSpaceWidth() / 4;
int height = myView.getCharHeight();
int halfHeight = height / 2;
int mid = y - halfHeight;
int top = y - height;
UIUtil.drawLine(g, startX, mid, endX, mid);
UIUtil.drawLine(g, endX, y, endX, top);
g.fillPolygon(
new int[] {endX - halfHeight, endX - halfHeight, endX},
new int[] {y, y - height, y - halfHeight},
3);
} else if (c == '\u3000') { // ideographic space
final int charHeight = myView.getCharHeight();
g.drawRect(startX + 2, y - charHeight, endX - startX - 4, charHeight);
}
}
}
}
private void paintLineFragments(
Graphics2D g, Rectangle clip, int visualLine, int y, LineFragmentPainter painter) {
float x = visualLine == 0 ? myView.getPrefixTextWidthInPixels() : 0;
int offset = myView.visualPositionToOffset(new VisualPosition(visualLine, 0));
int visualLineEndOffset =
myView.visualPositionToOffset(new VisualPosition(visualLine, Integer.MAX_VALUE, true));
IterationState it = null;
int prevEndOffset = -1;
boolean firstFragment = true;
int maxColumn = 0;
for (VisualLineFragmentsIterator.Fragment fragment :
VisualLineFragmentsIterator.create(myView, offset, false)) {
int fragmentStartOffset = fragment.getStartOffset();
int start = fragmentStartOffset;
int end = fragment.getEndOffset();
x = fragment.getStartX();
if (firstFragment) {
firstFragment = false;
SoftWrap softWrap = myEditor.getSoftWrapModel().getSoftWrap(offset);
if (softWrap != null) {
prevEndOffset = offset;
it =
new IterationState(
myEditor,
offset == 0 ? 0 : offset - 1,
visualLineEndOffset,
true,
false,
false,
false);
if (it.getEndOffset() <= offset) {
it.advance();
}
painter.paintBeforeLineStart(
g,
it.getStartOffset() == offset
? it.getBeforeLineStartBackgroundAttributes()
: it.getMergedAttributes(),
fragment.getStartVisualColumn(),
fragment.getStartX(),
y);
}
}
FoldRegion foldRegion = fragment.getCurrentFoldRegion();
if (foldRegion == null) {
if (start != prevEndOffset) {
it =
new IterationState(
myEditor,
start,
fragment.isRtl() ? offset : visualLineEndOffset,
true,
false,
false,
fragment.isRtl());
}
prevEndOffset = end;
assert it != null;
while (fragment.isRtl() ? start > end : start < end) {
if (fragment.isRtl() ? it.getEndOffset() >= start : it.getEndOffset() <= start) {
assert !it.atEnd();
it.advance();
}
TextAttributes attributes = it.getMergedAttributes();
int curEnd =
fragment.isRtl()
? Math.max(it.getEndOffset(), end)
: Math.min(it.getEndOffset(), end);
float xNew = fragment.offsetToX(x, start, curEnd);
painter.paint(
g,
fragment,
fragment.isRtl() ? fragmentStartOffset - start : start - fragmentStartOffset,
fragment.isRtl() ? fragmentStartOffset - curEnd : curEnd - fragmentStartOffset,
attributes,
x,
xNew,
y);
x = xNew;
start = curEnd;
}
} else {
float xNew = fragment.getEndX();
painter.paint(
g,
fragment,
0,
fragment.getEndVisualColumn() - fragment.getStartVisualColumn(),
getFoldRegionAttributes(foldRegion),
x,
xNew,
y);
x = xNew;
prevEndOffset = -1;
it = null;
}
maxColumn = fragment.getEndVisualColumn();
}
if (it == null || it.getEndOffset() != visualLineEndOffset) {
it =
new IterationState(
myEditor,
visualLineEndOffset == offset ? visualLineEndOffset : visualLineEndOffset - 1,
visualLineEndOffset,
true,
false,
false,
false);
}
if (!it.atEnd()) {
it.advance();
}
assert it.atEnd();
painter.paintAfterLineEnd(g, clip, it, maxColumn, x, y);
}