QString OrganiseFormat::ParseBlock(QString block, const Song& song,
bool* any_empty) const {
QRegExp tag_regexp(kTagPattern);
QRegExp block_regexp(kBlockPattern);
// Find any blocks first
int pos = 0;
while ((pos = block_regexp.indexIn(block, pos)) != -1) {
// Recursively parse the block
bool empty = false;
QString value = ParseBlock(block_regexp.cap(1), song, &empty);
if (empty) value = "";
// Replace the block's value
block.replace(pos, block_regexp.matchedLength(), value);
pos += value.length();
}
// Now look for tags
bool empty = false;
pos = 0;
while ((pos = tag_regexp.indexIn(block, pos)) != -1) {
QString value = TagValue(tag_regexp.cap(1), song);
if (value.isEmpty()) empty = true;
block.replace(pos, tag_regexp.matchedLength(), value);
pos += value.length();
}
if (any_empty) *any_empty = empty;
return block;
}
QValidator::State OrganiseFormat::Validator::validate(QString& input,
int&) const {
QRegExp tag_regexp(kTagPattern);
// Make sure all the blocks match up
int block_level = 0;
for (int i = 0; i < input.length(); ++i) {
if (input[i] == '{')
block_level++;
else if (input[i] == '}')
block_level--;
if (block_level < 0 || block_level > 1) return QValidator::Invalid;
}
if (block_level != 0) return QValidator::Invalid;
// Make sure the tags are valid
int pos = 0;
while ((pos = tag_regexp.indexIn(input, pos)) != -1) {
if (!OrganiseFormat::kKnownTags.contains(tag_regexp.cap(1)))
return QValidator::Invalid;
pos += tag_regexp.matchedLength();
}
return QValidator::Acceptable;
}
void OrganiseFormat::SyntaxHighlighter::highlightBlock(const QString& text) {
const bool light = QApplication::palette().color(QPalette::Base).value() > 128;
const QRgb block_color = light ? kBlockColorLight : kBlockColorDark;
const QRgb valid_tag_color = light ? kValidTagColorLight : kValidTagColorDark;
const QRgb invalid_tag_color = light ? kInvalidTagColorLight : kInvalidTagColorDark;
QRegExp tag_regexp(kTagPattern);
QRegExp block_regexp(kBlockPattern);
QTextCharFormat block_format;
block_format.setBackground(QColor(block_color));
// Reset formatting
setFormat(0, text.length(), QTextCharFormat());
// Blocks
int pos = 0;
while ((pos = block_regexp.indexIn(text, pos)) != -1) {
setFormat(pos, block_regexp.matchedLength(), block_format);
pos += block_regexp.matchedLength();
}
// Tags
pos = 0;
while ((pos = tag_regexp.indexIn(text, pos)) != -1) {
QTextCharFormat f = format(pos);
f.setForeground(QColor(OrganiseFormat::kKnownTags.contains(tag_regexp.cap(1))
? valid_tag_color : invalid_tag_color));
setFormat(pos, tag_regexp.matchedLength(), f);
pos += tag_regexp.matchedLength();
}
}
