void HGMarkdownHighlighter::highlight()
{
if (cached_elements == NULL) {
qDebug() << "cached_elements is NULL";
return;
}
if (highlightingStyles == NULL)
this->setDefaultStyles();
this->clearFormatting();
for (int i = 0; i < highlightingStyles->size(); i++)
{
HighlightingStyle style = highlightingStyles->at(i);
pmh_element *elem_cursor = cached_elements[style.type];
while (elem_cursor != NULL)
{
if (elem_cursor->end <= elem_cursor->pos) {
elem_cursor = elem_cursor->next;
continue;
}
// "The QTextLayout object can only be modified from the
// documentChanged implementation of a QAbstractTextDocumentLayout
// subclass. Any changes applied from the outside cause undefined
// behavior." -- we are breaking this rule here. There might be
// a better (more correct) way to do this.
int startBlockNum = document->findBlock(elem_cursor->pos).blockNumber();
int endBlockNum = document->findBlock(elem_cursor->end).blockNumber();
for (int j = startBlockNum; j <= endBlockNum; j++)
{
QTextBlock block = document->findBlockByNumber(j);
QTextLayout *layout = block.layout();
QList<QTextLayout::FormatRange> list = layout->additionalFormats();
int blockpos = block.position();
QTextLayout::FormatRange r;
r.format = style.format;
if (j == startBlockNum) {
r.start = elem_cursor->pos - blockpos;
r.length = (startBlockNum == endBlockNum)
? elem_cursor->end - elem_cursor->pos
: block.length() - r.start;
} else if (j == endBlockNum) {
r.start = 0;
r.length = elem_cursor->end - blockpos;
} else {
r.start = 0;
r.length = block.length();
}
list.append(r);
layout->setAdditionalFormats(list);
}
elem_cursor = elem_cursor->next;
}
}
document->markContentsDirty(0, document->characterCount());
}
void QSAEditor::clearMarkerFormat(const QTextBlock &block, int markerId)
{
QTextLayout *layout = block.layout();
QList<QTextLayout::FormatRange> formats = layout->additionalFormats();
bool formatsChanged = false;
for (int i = 0; i < formats.count(); ++i)
if (formats.at(i).format.hasProperty(markerId)) {
formats[i].format.clearBackground();
formats[i].format.clearProperty(markerId);
if (formats.at(i).format.properties().isEmpty()) {
formats.removeAt(i);
--i;
}
formatsChanged = true;
}
if (formatsChanged)
layout->setAdditionalFormats(formats);
}
void QSyntaxHighlighterPrivate::applyFormatChanges()
{
QTextLayout *layout = currentBlock.layout();
QList<QTextLayout::FormatRange> ranges = layout->additionalFormats();
const int preeditAreaStart = layout->preeditAreaPosition();
const int preeditAreaLength = layout->preeditAreaText().length();
QList<QTextLayout::FormatRange>::Iterator it = ranges.begin();
while (it != ranges.end()) {
if (it->start >= preeditAreaStart
&& it->start + it->length <= preeditAreaStart + preeditAreaLength)
++it;
else
it = ranges.erase(it);
}
QTextCharFormat emptyFormat;
QTextLayout::FormatRange r;
r.start = r.length = -1;
int i = 0;
while (i < formatChanges.count()) {
while (i < formatChanges.count() && formatChanges.at(i) == emptyFormat)
++i;
if (i >= formatChanges.count())
break;
r.start = i;
r.format = formatChanges.at(i);
while (i < formatChanges.count() && formatChanges.at(i) == r.format)
++i;
if (i >= formatChanges.count())
break;
r.length = i - r.start;
if (r.start >= preeditAreaStart) {
r.start += preeditAreaLength;
} else if (r.start + r.length >= preeditAreaStart) {
r.length += preeditAreaLength;
}
ranges << r;
r.start = r.length = -1;
}
if (r.start != -1) {
r.length = formatChanges.count() - r.start;
if (r.start >= preeditAreaStart) {
r.start += preeditAreaLength;
} else if (r.start + r.length >= preeditAreaStart) {
r.length += preeditAreaLength;
}
ranges << r;
}
layout->setAdditionalFormats(ranges);
}
void MarkdownHighlighter::resultReady(pmh_element **elements)
{
QTextBlock block = document()->firstBlock();
while (block.isValid()) {
block.layout()->clearAdditionalFormats();
block = block.next();
}
if (!elements) {
qDebug() << "elements is null";
return;
}
// QTextDocument::characterCount returns a value one higher than the
// actual character count.
// See: https://bugreports.qt.nokia.com//browse/QTBUG-4841
// document->toPlainText().length() would give us the correct value
// but it's probably too slow.
unsigned long max_offset = document()->characterCount() - 1;
for (int i = 0; i < highlightingStyles.size(); i++)
{
HighlightingStyle style = highlightingStyles.at(i);
pmh_element *elem_cursor = elements[style.type];
while (elem_cursor != NULL)
{
unsigned long pos = elem_cursor->pos;
unsigned long end = elem_cursor->end;
if (end <= pos || max_offset < pos)
{
elem_cursor = elem_cursor->next;
continue;
}
if (max_offset < end)
end = max_offset;
// "The QTextLayout object can only be modified from the
// documentChanged implementation of a QAbstractTextDocumentLayout
// subclass. Any changes applied from the outside cause undefined
// behavior." -- we are breaking this rule here. There might be
// a better (more correct) way to do this.
int startBlockNum = document()->findBlock(pos).blockNumber();
int endBlockNum = document()->findBlock(end).blockNumber();
for (int j = startBlockNum; j <= endBlockNum; j++)
{
QTextBlock block = document()->findBlockByNumber(j);
QTextLayout *layout = block.layout();
QList<QTextLayout::FormatRange> list = layout->additionalFormats();
int blockpos = block.position();
QTextLayout::FormatRange r;
r.format = style.format;
if (/*_makeLinksClickable
&&*/ (elem_cursor->type == pmh_LINK
|| elem_cursor->type == pmh_AUTO_LINK_URL
|| elem_cursor->type == pmh_AUTO_LINK_EMAIL
|| elem_cursor->type == pmh_REFERENCE)
&& elem_cursor->address != NULL)
{
QString address(elem_cursor->address);
if (elem_cursor->type == pmh_AUTO_LINK_EMAIL && !address.startsWith("mailto:"))
address = "mailto:" + address;
QTextCharFormat linkFormat(r.format);
linkFormat.setAnchor(true);
linkFormat.setAnchorHref(address);
linkFormat.setToolTip(address);
r.format = linkFormat;
}
if (j == startBlockNum) {
r.start = pos - blockpos;
r.length = (startBlockNum == endBlockNum)
? end - pos
: block.length() - r.start;
} else if (j == endBlockNum) {
r.start = 0;
r.length = end - blockpos;
} else {
r.start = 0;
r.length = block.length();
}
list.append(r);
layout->setAdditionalFormats(list);
}
elem_cursor = elem_cursor->next;
}
}
document()->markContentsDirty(0, document()->characterCount());
pmh_free_elements(elements);
}
