@Override
public Dimension getPreferredSize() {
if (myPreferredSize == null) {
int maxLineLength = 0;
int linesCount = 0;
for (LineTokenizer lt = new LineTokenizer(myRawText); !lt.atEnd(); lt.advance()) {
maxLineLength = Math.max(maxLineLength, lt.getLength());
linesCount++;
}
FontMetrics fontMetrics =
((EditorImpl) getEditor())
.getFontMetrics(
myTextAttributes != null ? myTextAttributes.getFontType() : Font.PLAIN);
int preferredHeight = getEditor().getLineHeight() * Math.max(1, linesCount);
int preferredWidth = fontMetrics.charWidth('m') * maxLineLength;
Insets insets = getInsets();
if (insets != null) {
preferredHeight += insets.top + insets.bottom;
preferredWidth += insets.left + insets.right;
}
myPreferredSize = new Dimension(preferredWidth, preferredHeight);
}
return myPreferredSize;
}
private int yPositionToOffset(int y, boolean beginLine) {
if (myEditorScrollbarTop == -1 || myEditorTargetHeight == -1) {
recalcEditorDimensions();
}
final int safeY = Math.max(0, y - myEditorScrollbarTop);
VisualPosition visual;
if (myEditorSourceHeight < myEditorTargetHeight) {
visual = myEditor.xyToVisualPosition(new Point(0, safeY));
} else {
float fraction = Math.max(0, Math.min(1, safeY / (float) myEditorTargetHeight));
final int lineCount = myEditorSourceHeight / myEditor.getLineHeight();
visual = new VisualPosition((int) (fraction * lineCount), 0);
}
int line = myEditor.visualToLogicalPosition(visual).line;
Document document = myEditor.getDocument();
if (line < 0) return 0;
if (line >= document.getLineCount()) return document.getTextLength();
return beginLine ? document.getLineStartOffset(line) : document.getLineEndOffset(line);
}
private LogicalPosition fitInsideEditor(LogicalPosition pos) {
int lineCount = myDocumentWindow.getLineCount();
if (pos.line >= lineCount) {
pos = new LogicalPosition(lineCount - 1, pos.column);
}
int lineLength =
myDocumentWindow.getLineEndOffset(pos.line) - myDocumentWindow.getLineStartOffset(pos.line);
if (pos.column >= lineLength) {
pos = new LogicalPosition(pos.line, Math.max(0, lineLength - 1));
}
return pos;
}