#include "qtui.h"
ChatItem::ChatItem(const QPersistentModelIndex &index_, QGraphicsItem *parent) : QGraphicsItem(parent), _index(index_) {
- QFontMetricsF *metrics = QtUi::style()->fontMetrics(data(ChatLineModel::FormatRole).value<UiStyle::FormatList>().at(0).second);
- _lineHeight = metrics->lineSpacing();
- _lineLeading = metrics->leading();
+ _fontMetrics = QtUi::style()->fontMetrics(data(ChatLineModel::FormatRole).value<UiStyle::FormatList>().at(0).second);
_layout = 0;
+ _lines = 0;
}
ChatItem::~ChatItem() {
int ChatItem::setWidth(int w) {
w -= 10;
if(w == _boundingRect.width()) return _boundingRect.height();
- int h = heightForWidth(w);
_boundingRect.setWidth(w);
+ int h = heightForWidth(w);
_boundingRect.setHeight(h);
if(haveLayout()) updateLayout();
return h;
int ChatItem::heightForWidth(int width) {
if(data(ChatLineModel::ColumnTypeRole).toUInt() != ChatLineModel::ContentsColumn)
- return _lineHeight; // only contents can be multi-line
+ return fontMetrics()->lineSpacing(); // only contents can be multi-line
- ChatLineModel::WrapList wrapList = data(ChatLineModel::WrapListRole).value<ChatLineModel::WrapList>();
- int lines = 1;
- qreal w = 0;
- for(int i = 0; i < wrapList.count(); i++) {
- w += wrapList.at(i).width;
- if(w <= width) {
- w += wrapList.at(i).trailing;
- continue;
- }
- lines++;
- w = wrapList.at(i).width;
- while(w >= width) {
- lines++;
- w -= width;
+ _lines = 1;
+ QTextLine line;
+ WrapColumnFinder finder(this);
+ while(finder.nextWrapColumn(line) > 0) _lines++;
+ return _lines * fontMetrics()->lineSpacing();
+}
+
+ChatItem::WrapColumnFinder::WrapColumnFinder(ChatItem *_item) : item(_item) {
+ wrapList = item->data(ChatLineModel::WrapListRole).value<ChatLineModel::WrapList>();
+ wordidx = 0;
+ layout = 0;
+ lastwrapcol = 0;
+ lastwrappos = 0;
+ w = 0;
+}
+
+ChatItem::WrapColumnFinder::~WrapColumnFinder() {
+ delete layout;
+}
+
+int ChatItem::WrapColumnFinder::nextWrapColumn(QTextLine &line) {
+ while(wordidx < wrapList.count()) {
+ w += wrapList.at(wordidx).width;
+ if(w >= item->width()) {
+ if(lastwrapcol == wrapList.at(wordidx).start) {
+ // first word, and it doesn't fit
+ if(!line.isValid()) {
+ layout = item->createLayout();
+ layout->beginLayout();
+ line = layout->createLine();
+ line.setLineWidth(item->width());
+ layout->endLayout();
+ }
+ int idx = line.xToCursor((line.textStart() ? 0 : lastwrappos) + item->width());
+ qreal x = line.cursorToX(idx);
+ idx += line.textStart();
+ w = w - x - wrapList.at(wordidx).width;
+ if(line.textStart()) lastwrappos += x;
+ else lastwrappos = x;
+ lastwrapcol = idx;
+ return idx;
+ }
+ // not the first word, so just wrap before this
+ lastwrapcol = wrapList.at(wordidx).start;
+ lastwrappos = lastwrappos + w - wrapList.at(wordidx).width;
+ w = 0;
+ return lastwrapcol;
}
+ w += wrapList.at(wordidx).trailing;
+ wordidx++;
}
- return lines * _lineHeight;
+ return -1;
}
-void ChatItem::layout() {
- if(haveLayout()) return;
- _layout = new QTextLayout(data(MessageModel::DisplayRole).toString());
-
- // Convert format information into a FormatRange
- QList<QTextLayout::FormatRange> formatRanges;
- UiStyle::FormatList formatList = data(MessageModel::FormatRole).value<UiStyle::FormatList>();
- QTextLayout::FormatRange range;
- int i = 0;
- for(i = 0; i < formatList.count(); i++) {
- range.format = QtUi::style()->mergedFormat(formatList.at(i).second);
- range.start = formatList.at(i).first;
- if(i > 0) formatRanges.last().length = range.start - formatRanges.last().start;
- formatRanges.append(range);
- }
- if(i > 0) formatRanges.last().length = _layout->text().length() - formatRanges.last().start;
- _layout->setAdditionalFormats(formatRanges);
- updateLayout();
+QTextLayout *ChatItem::createLayout() {
+ QTextLayout *layout = new QTextLayout(data(MessageModel::DisplayRole).toString());
+
+ QTextOption option;
+ option.setWrapMode(QTextOption::WrapAnywhere);
+ layout->setTextOption(option);
+
+ QList<QTextLayout::FormatRange> formatRanges
+ = QtUi::style()->toTextLayoutList(data(MessageModel::FormatRole).value<UiStyle::FormatList>(), layout->text().length());
+ layout->setAdditionalFormats(formatRanges);
+ return layout;
}
void ChatItem::updateLayout() {
- if(!haveLayout()) layout();
+ if(!haveLayout()) _layout = createLayout();
// Now layout
+ ChatLineModel::WrapList wrapList = data(ChatLineModel::WrapListRole).value<ChatLineModel::WrapList>();
+ if(!wrapList.count()) return; // empty chatitem
+ int wordidx = 0;
+ ChatLineModel::Word word = wrapList.at(0);
+
qreal h = 0;
+ WrapColumnFinder finder(this);
_layout->beginLayout();
forever {
QTextLine line = _layout->createLine();
if (!line.isValid())
break;
- line.setLineWidth(width());
- h += _lineLeading;
+ int col = finder.nextWrapColumn(line);
+ line.setNumColumns(col >= 0 ? col - line.textStart() : _layout->text().length());
+
+ h += fontMetrics()->leading();
line.setPosition(QPointF(0, h));
h += line.height();
}
_layout = 0;
}
+//int ChatItem::findNextWrapColumn(
+
void ChatItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) {
Q_UNUSED(option); Q_UNUSED(widget);
- layout();
+ if(!haveLayout()) updateLayout();
_layout->draw(painter, QPointF(0,0), QVector<QTextLayout::FormatRange>(), boundingRect());
painter->drawRect(boundingRect());
int width = 0;
QVariantList wrapList = data(ChatLineModel::WrapListRole).toList();
for(int i = 2; i < wrapList.count(); i+=2) {
- QRect r(wrapList[i-1].toUInt(), 0, wrapList[i+1].toUInt() - wrapList[i-1].toUInt(), _lineHeight);
+ QRect r(wrapList[i-1].toUInt(), 0, wrapList[i+1].toUInt() - wrapList[i-1].toUInt(), fontMetrics()->lineSpacing());
painter->drawRect(r);
}
}
+
/*
void ChatItem::layout() {
if(!_layout.additionalFormats().count()) return; // no text set
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