* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
+#include <QFontMetrics>
+#include <QTextBoundaryFinder>
+
#include "chatlinemodelitem.h"
#include "chatlinemodel.h"
#include "qtui.h"
#include "uistyle.h"
-ChatlineModelItem::ChatlineModelItem(const Message &msg) : MessageModelItem(msg) {
- QtUiStyle::StyledMessage m = QtUi::style()->styleMessage(msg);
+// This Struct is taken from Harfbuzz. We use it only to calc it's size.
+// we use a shared memory region so we do not have to malloc a buffer area for every line
+typedef struct {
+ /*HB_LineBreakType*/ unsigned lineBreakType :2;
+ /*HB_Bool*/ unsigned whiteSpace :1; /* A unicode whitespace character, except NBSP, ZWNBSP */
+ /*HB_Bool*/ unsigned charStop :1; /* Valid cursor position (for left/right arrow) */
+ /*HB_Bool*/ unsigned wordBoundary :1;
+ /*HB_Bool*/ unsigned sentenceBoundary :1;
+ unsigned unused :2;
+} HB_CharAttributes_Dummy;
- _timestamp.plainText = m.timestamp.plainText;
- _sender.plainText = m.sender.plainText;
- _contents.plainText = m.contents.plainText;
+// PRIVATE DATA FOR CHATLINE MODEL ITEM
+class ChatLineModelItemPrivate {
+ struct ChatLinePart {
+ QString plainText;
+ UiStyle::FormatList formatList;
+ inline ChatLinePart(const QString &pT, const UiStyle::FormatList &fL) : plainText(pT), formatList(fL) {}
+ };
- _timestamp.formatList = m.timestamp.formatList;
- _sender.formatList = m.sender.formatList;
- _contents.formatList = m.contents.formatList;
+public:
+ inline ChatLineModelItemPrivate(const Message &msg) : _msgBuffer(new Message(msg)), timestamp(0), sender(0), contents(0) {}
+ inline ~ChatLineModelItemPrivate() {
+ if(_msgBuffer) {
+ delete _msgBuffer;
+ } else {
+ delete timestamp;
+ delete sender;
+ delete contents;
+ }
+ }
-}
+ inline bool needsStyling() { return (bool)_msgBuffer; }
+ inline ChatLinePart *partByColumn(MessageModel::ColumnType column) {
+ switch(column) {
+ case ChatLineModel::TimestampColumn:
+ return timestamp;
+ case ChatLineModel::SenderColumn:
+ return sender;
+ case ChatLineModel::ContentsColumn:
+ return contents;
+ default:
+ Q_ASSERT(false);
+ return 0;
+ }
+ }
-QVariant ChatlineModelItem::data(int column, int role) const {
- const ChatlinePart *part;
+ inline const QString &plainText(MessageModel::ColumnType column) {
+ if(needsStyling())
+ style();
+ return partByColumn(column)->plainText;
+ }
- switch(column) {
- case ChatlineModel::TimestampColumn: part = &_timestamp; break;
- case ChatlineModel::SenderColumn: part = &_sender; break;
- case ChatlineModel::ContentsColumn: part = &_contents; break;
- default: return MessageModelItem::data(column, role);
+ inline const UiStyle::FormatList &formatList(MessageModel::ColumnType column) {
+ if(needsStyling())
+ style();
+ return partByColumn(column)->formatList;
}
- switch(role) {
- case ChatlineModel::DisplayRole: return part->plainText;
- case ChatlineModel::FormatRole: return QVariant::fromValue<UiStyle::FormatList>(part->formatList);
+ inline const ChatLineModel::WrapList &wrapList() {
+ if(needsStyling())
+ style();
+ if(_wrapList.isEmpty())
+ computeWrapList();
+ return _wrapList;
}
+
+private:
+ inline void style() {
+ QtUiStyle::StyledMessage m = QtUi::style()->styleMessage(*_msgBuffer);
- return MessageModelItem::data(column, role);
+ timestamp = new ChatLinePart(m.timestamp.plainText, m.timestamp.formatList);
+ sender = new ChatLinePart(m.sender.plainText, m.sender.formatList);
+ contents = new ChatLinePart(m.contents.plainText, m.contents.formatList);
+
+ delete _msgBuffer;
+ _msgBuffer = 0;
+ }
+
+ inline void computeWrapList() {
+ if(contents->plainText.isEmpty())
+ return;
+
+ enum Mode { SearchStart, SearchEnd };
+
+ QList<ChatLineModel::Word> wplist; // use a temp list which we'll later copy into a QVector for efficiency
+ QTextBoundaryFinder finder(QTextBoundaryFinder::Word, contents->plainText.unicode(), contents->plainText.length(), TextBoundaryFinderBuffer, TextBoundaryFinderBufferSize);
+
+ int idx;
+ int oldidx = 0;
+ bool wordStart = false;
+ bool wordEnd = false;
+ Mode mode = SearchEnd;
+ ChatLineModel::Word word;
+ word.start = 0;
+ qreal wordstartx = 0;
+
+ QTextLayout layout(contents->plainText);
+ QTextOption option;
+ option.setWrapMode(QTextOption::NoWrap);
+ layout.setTextOption(option);
+
+ layout.setAdditionalFormats(QtUi::style()->toTextLayoutList(contents->formatList, contents->plainText.length()));
+ layout.beginLayout();
+ QTextLine line = layout.createLine();
+ line.setNumColumns(contents->plainText.length());
+ layout.endLayout();
+
+ do {
+ idx = finder.toNextBoundary();
+ if(idx < 0) {
+ idx = contents->plainText.length();
+ wordStart = false;
+ wordEnd = false;
+ mode = SearchStart;
+ } else {
+ wordStart = finder.boundaryReasons().testFlag(QTextBoundaryFinder::StartWord);
+ wordEnd = finder.boundaryReasons().testFlag(QTextBoundaryFinder::EndWord);
+ }
+
+ //if(flg) qDebug() << idx << mode << wordStart << wordEnd << contents->plainText.left(idx) << contents->plainText.mid(idx);
+
+ if(mode == SearchEnd || (!wordStart && wordEnd)) {
+ if(wordStart || !wordEnd) continue;
+ oldidx = idx;
+ mode = SearchStart;
+ continue;
+ }
+ qreal wordendx = line.cursorToX(oldidx);
+ qreal trailingendx = line.cursorToX(idx);
+ word.width = wordendx - wordstartx;
+ word.trailing = trailingendx - wordendx;
+ wordstartx = trailingendx;
+ wplist.append(word);
+
+ if(wordStart) {
+ word.start = idx;
+ mode = SearchEnd;
+ }
+ // the part " || (finder.position() == contents->plainText.length())" shouldn't be necessary
+ // but in rare and indeterministic cases Qt states that the end of the text is not a boundary o_O
+ } while(finder.isAtBoundary() || (finder.position() == contents->plainText.length()));
+
+ // A QVector needs less space than a QList
+ _wrapList.resize(wplist.count());
+ for(int i = 0; i < wplist.count(); i++) {
+ _wrapList[i] = wplist.at(i);
+ }
+ }
+
+ ChatLineModel::WrapList _wrapList;
+ Message *_msgBuffer;
+ ChatLinePart *timestamp, *sender, *contents;
+
+ static unsigned char *TextBoundaryFinderBuffer;
+ static int TextBoundaryFinderBufferSize;
+};
+
+unsigned char *ChatLineModelItemPrivate::TextBoundaryFinderBuffer = (unsigned char *)malloc(512 * sizeof(HB_CharAttributes_Dummy));
+int ChatLineModelItemPrivate::TextBoundaryFinderBufferSize = 512 * (sizeof(HB_CharAttributes_Dummy) / sizeof(unsigned char));
+
+
+// ****************************************
+// the actual ChatLineModelItem
+// ****************************************
+ChatLineModelItem::ChatLineModelItem(const Message &msg)
+ : MessageModelItem(msg),
+ _data(new ChatLineModelItemPrivate(msg))
+{
+}
+
+ChatLineModelItem::~ChatLineModelItem() {
+ delete _data;
}
-bool ChatlineModelItem::setData(int column, const QVariant &value, int role) {
- return false;
+QVariant ChatLineModelItem::data(int column, int role) const {
+ if(column < ChatLineModel::TimestampColumn || column > ChatLineModel::ContentsColumn)
+ return MessageModelItem::data(column, role);
+ MessageModel::ColumnType columnType = (MessageModel::ColumnType)column;
+
+ switch(role) {
+ case ChatLineModel::DisplayRole:
+ return _data->plainText(columnType);
+ case ChatLineModel::FormatRole:
+ return QVariant::fromValue<UiStyle::FormatList>(_data->formatList(columnType));
+ case ChatLineModel::WrapListRole:
+ if(columnType != ChatLineModel::ContentsColumn)
+ return QVariant();
+ return QVariant::fromValue<ChatLineModel::WrapList>(_data->wrapList());
+ }
+ return MessageModelItem::data(column, role);
}
+
projects / quassel.git / blobdiff