Add tooltip for displaying flag and comment in hexdump (#1471)

src/core/Cutter.cpp

@@ -775,6 +775,16 @@ void CutterCore::delComment(RVA addr)
     emit commentsChanged();
 }
 
+/**
+ * @brief Gets the comment present at a specific address
+ * @param addr The address to be checked
+ * @return String containing comment
+ */
+QString CutterCore::getCommentAt(RVA addr)
+{
+    return Core()->cmdRawAt("CC.", addr);
+}
+
 void CutterCore::setImmediateBase(const QString &r2BaseName, RVA offset)
 {
     if (offset == RVA_INVALID) {
@@ -3465,6 +3475,17 @@ void CutterCore::addFlag(RVA offset, QString name, RVA size)
     emit flagsChanged();
 }
 
+/**
+ * @brief Gets all the flags present at a specific address
+ * @param addr The address to be checked
+ * @return String containing all the flags which are comma-separated
+ */
+QString CutterCore::listFlagsAsStringAt(RVA addr)
+{
+    CORE_LOCK();
+    return r_flag_get_liststr (core->flags, addr);
+}
+
 QString CutterCore::nearestFlag(RVA offset, RVA *flagOffsetOut)
 {
     auto r = cmdj(QString("fdj @") + QString::number(offset)).object();

src/core/Cutter.h

@@ -169,6 +169,7 @@ class CutterCore: public QObject
     void delFlag(RVA addr);
     void delFlag(const QString &name);
     void addFlag(RVA offset, QString name, RVA size);
+    QString listFlagsAsStringAt(RVA addr);
     /**
      * @brief Get nearest flag at or before offset.
      * @param offset search position
@@ -217,6 +218,7 @@ class CutterCore: public QObject
     /* Comments */
     void setComment(RVA addr, const QString &cmt);
     void delComment(RVA addr);
+    QString getCommentAt(RVA addr);
     void setImmediateBase(const QString &r2BaseName, RVA offset = RVA_INVALID);
     void setCurrentBits(int bits, RVA offset = RVA_INVALID);
 

src/widgets/HexWidget.cpp

@@ -19,6 +19,7 @@
 #include <QJsonObject>
 #include <QJsonArray>
 #include <QRegularExpression>
+#include <QToolTip>
 
 static constexpr uint64_t MAX_COPY_SIZE = 128 * 1024 * 1024;
 static constexpr int MAX_LINE_WIDTH_PRESET = 32;
@@ -467,6 +468,15 @@ void HexWidget::mouseMoveEvent(QMouseEvent *event)
     QPoint pos = event->pos();
     pos.rx() += horizontalScrollBar()->value();
 
+    auto mouseAddr = mousePosToAddr(pos).address;
+
+    QString metaData = getFlagsAndComment(mouseAddr);
+    if (!metaData.isEmpty() && itemArea.contains(pos)) {
+        QToolTip::showText(event->globalPos(), metaData.replace(",", ", "), this);
+    } else {
+        QToolTip::hideText();
+    }
+
     if (!updatingSelection) {
         if (itemArea.contains(pos) || asciiArea.contains(pos))
             setCursor(Qt::IBeamCursor);
@@ -1010,6 +1020,14 @@ void HexWidget::drawItemArea(QPainter &painter)
         for (int j = 0; j < itemColumns; ++j) {
             for (int k = 0; k < itemGroupSize && itemAddr <= data->maxIndex(); ++k, itemAddr += itemByteLen) {
                 itemString = renderItem(itemAddr - startAddress, &itemColor);
+
+                if (!getFlagsAndComment(itemAddr).isEmpty()) {
+                    QColor markerColor(borderColor);
+                    markerColor.setAlphaF(0.5);
+                    const auto shape = rangePolygons(itemAddr, itemAddr, false)[0];
+                    painter.setPen(markerColor);
+                    painter.drawPolyline(shape);
+                }
                 if (selection.contains(itemAddr)  && !cursorOnAscii) {
                     itemColor = palette().highlightedText().color();
                 }
@@ -1454,6 +1472,27 @@ QChar HexWidget::renderAscii(int offset, QColor *color)
     return QChar(byte);
 }
 
+/**
+ * @brief Gets the available flags and comment at a specific address.
+ * @param address Address of Item to be checked.
+ * @return String containing the flags and comment available at the address.
+ */
+QString HexWidget::getFlagsAndComment(uint64_t address)
+{
+    QString flagNames = Core()->listFlagsAsStringAt(address);
+    QString metaData = flagNames.isEmpty() ? "" : "Flags: " + flagNames.trimmed();
+
+    QString comment = Core()->getCommentAt(address);
+    if (!comment.isEmpty()) {
+        if (!metaData.isEmpty()) {
+            metaData.append("\n");
+        }
+        metaData.append("Comment: " + comment.trimmed());
+    }
+
+    return metaData;
+}
+
 void HexWidget::fetchData()
 {
     data.swap(oldData);

src/widgets/HexWidget.h

@@ -329,6 +329,7 @@ private slots:
     QVariant readItem(int offset, QColor *color = nullptr);
     QString renderItem(int offset, QColor *color = nullptr);
     QChar renderAscii(int offset, QColor *color = nullptr);
+    QString getFlagsAndComment(uint64_t address);
     /**
      * @brief Get the location on which operations such as Writing should apply.
      * @return Start of selection if multiple bytes are selected. Otherwise, the curren seek of the widget.