/**
* Indents line <code>line</code> in <code>document</code> with <code>indent</code>. Leaves
* leading comment signs alone.
*
* @param document the document
* @param line the line
* @param indent the indentation to insert
* @param tabLength the length of a tab
* @throws BadLocationException on concurrent document modification
*/
private void addIndent(Document document, int line, CharSequence indent, int tabLength)
throws BadLocationException {
IRegion region = document.getLineInformation(line);
int insert = region.getOffset();
int endOffset = region.getOffset() + region.getLength();
// Compute insert after all leading line comment markers
int newInsert = insert;
while (newInsert < endOffset - 2 && document.get(newInsert, 2).equals(LINE_COMMENT))
newInsert += 2;
// Heuristic to check whether it is commented code or just a comment
if (newInsert > insert) {
int whitespaceCount = 0;
int i = newInsert;
while (i < endOffset - 1) {
char ch = document.get(i, 1).charAt(0);
if (!Character.isWhitespace(ch)) break;
whitespaceCount = whitespaceCount + computeVisualLength(ch, tabLength);
i++;
}
if (whitespaceCount != 0 && whitespaceCount >= CodeFormatterUtil.getIndentWidth(fProject))
insert = newInsert;
}
// Insert indent
document.replace(insert, 0, indent.toString());
}
/**
* The preference setting for the visual tabulator display.
*
* @return the number of spaces displayed for a tabulator in the editor
*/
private int getVisualTabLengthPreference() {
return CodeFormatterUtil.getTabWidth(fProject);
}
private int getTabDisplaySize() {
return CodeFormatterUtil.getTabWidth(null);
}
private int getIndentSize() {
return CodeFormatterUtil.getIndentWidth(null);
}