// Used in compiling to mark out "dirty" areas of the code; ie, comments and string literals.
// These dirty areas don't get their syntax highlighted or any special treatment.
// @returns: pairs of integers that represent dirty boundaries.
private ArrayList<Integer> getDirty(String code) {
ArrayList<Integer> dirtyBounds = new ArrayList<>();
// Handles string literals
int j = -1;
while (true) {
j = code.indexOf("\"", j + 1);
if (j < 0) break;
// Ignore escaped characters
if (!code.substring(j - 1, j).equals("\\")) dirtyBounds.add(j);
}
// End of line comments
j = -1;
while (true) {
j = code.indexOf("//", j + 1);
if (j < 0) break;
dirtyBounds.add(j);
// If there's no newline, then the comment lasts for the length of the code
dirtyBounds.add(
code.indexOf("\n", j + 1) == -1 ? code.length() : code.indexOf("\n", j + 1));
}
// Block comments (and javadoc comments)
j = -1;
while (true) {
j = code.indexOf("/*", j + 1);
if (j < 0) break;
dirtyBounds.add(j);
dirtyBounds.add(code.indexOf("*/", j + 1));
}
return dirtyBounds;
}
// A helper method to check if a given position is dirty or not.
private boolean isDirty(ArrayList<Integer> dirty, int position) {
for (int k = 0; k < dirty.size(); k += 2)
if (position > dirty.get(k) && position < dirty.get(k + 1)) return true;
return false;
}