Fixed #807 - Function summary displaying in tooltip (#831)

* Fixed #807 - Function summary displaying has bad disasm preview formatting (-monospace font)

* FunctionsWidget: tooltip has made less transparent, hardcoded constants utilization refactored, replaced raw command with json'ed one, added some space between paragraphs in tooltip (thanks to @ITAYC0HEN's advice)

src/widgets/FunctionsWidget.cpp

@@ -7,6 +7,7 @@
 #include "dialogs/RenameDialog.h"
 #include "dialogs/XrefsDialog.h"
 #include "utils/FunctionsTask.h"
+#include "utils/TempConfig.h"
 
 #include <algorithm>
 #include <QMenu>
@@ -14,8 +15,17 @@
 #include <QString>
 #include <QResource>
 #include <QShortcut>
+#include <QJsonArray>
 #include <QJsonObject>
 
+namespace {
+
+static const int kMaxTooltipWidth = 400;
+static const int kMaxTooltipDisasmPreviewLines = 10;
+static const int kMaxTooltipHighlightsLines = 5;
+
+}
+
 FunctionModel::FunctionModel(QList<FunctionDescription> *functions, QSet<RVA> *importAddresses,
                              ut64 *mainAdress, bool nested, QFont default_font, QFont highlight_font, QObject *parent)
     : QAbstractItemModel(parent),
@@ -186,16 +196,79 @@ QVariant FunctionModel::data(const QModelIndex &index, int role) const
         return static_cast<int>(Qt::AlignLeft | Qt::AlignVCenter);
 
     case Qt::ToolTipRole: {
-        QList<QString> info = Core()->cmd("afi @ " + function.name).split("\n");
-        if (info.length() > 2) {
-            QString size = info[4].split(" ")[1];
-            QString complex = info[8].split(" ")[1];
-            QString bb = info[11].split(" ")[1];
-            return QString("Summary:\n\n    Size: " + size +
-                           "\n    Cyclomatic complexity: " + complex +
-                           "\n    Basic blocks: " + bb +
-                           "\n\nDisasm preview:\n\n" + Core()->cmd("pdi 10 @ " + function.name) +
-                           "\nStrings:\n\n" + Core()->cmd("pdsf @ " + function.name));
+        const QJsonArray &info = Core()->cmdj("afij @ " + function.name).array();
+        if (!info.isEmpty()) {
+            const QJsonObject &funcInfo = info[0].toObject();
+
+            static const QStringList kRequiredFields{ "size", "cc", "nbbs" };
+            for (const auto& key : kRequiredFields) {
+                if (!funcInfo.contains(key)) {
+                    return QVariant();
+                }
+            }
+            const int size = funcInfo["size"].toInt();
+            const int complex = funcInfo["cc"].toInt();
+            const int bb = funcInfo["nbbs"].toInt();
+            QStringList disasmPreview;
+
+            QJsonArray jDisasmEntries;
+            {
+                // temporarily simplify the disasm output to get it colorful and simple to read
+                TempConfig tempConfig;
+                tempConfig.set("scr.html", true)
+                    .set("scr.color", COLOR_MODE_16M)
+                    .set("asm.lines", false)
+                    .set("asm.var", false)
+                    .set("asm.comments", false)
+                    .set("asm.bytes", false)
+                    .set("asm.lines.fcn", false)
+                    .set("asm.lines.out", false)
+                    .set("asm.lines.bb", false)
+                    .set("asm.bbline", false);
+
+                jDisasmEntries = Core()->cmdj(QString("pDJ %1 @ %2").arg(function.size).arg(function.offset)).array();
+            }
+            for (const QJsonValue &value : jDisasmEntries) {
+                const QJsonObject &object = value.toObject();
+
+                disasmPreview << object["text"].toString();
+                if (disasmPreview.length() >= kMaxTooltipDisasmPreviewLines) {
+                    disasmPreview << "...";
+                    break;
+                }
+            }
+
+            const QStringList &summary = Core()->cmd("pdsf @ " + function.name).split("\n", QString::SkipEmptyParts);
+
+            const QFont &fnt = Config()->getFont();
+            QFontMetrics fm{ fnt };
+
+            // elide long strings using current didsam font metrics
+            QStringList highlights;
+            for (const QString &s : summary) {
+                highlights << fm.elidedText(s, Qt::ElideRight, kMaxTooltipWidth);
+                if (highlights.length() > kMaxTooltipHighlightsLines) {
+                    highlights << "...";
+                    break;
+                }
+            }
+            QString toolTipContent = QString("<html><div style=\"font-family: %1; font-size: %2pt; white-space: nowrap;\">")
+                    .arg(fnt.family())
+                    .arg(qMax(6, fnt.pointSize() - 1)) // slightly decrease font size, to keep more text in the same 
+                + tr("<div><strong>Summary</strong>:<br>")
+                + tr("Size:&nbsp;%1,&nbsp;Cyclomatic complexity:&nbsp;%2,&nbsp;Basic blocks:&nbsp;%3")
+                    .arg(size)
+                    .arg(complex)
+                    .arg(bb)
+                + tr("</div><div style=\"margin-top: 10px;\"><strong>Disassembly preview</strong>:<br>%1</div>")
+                    .arg(disasmPreview.join("<br>"));
+
+            if (!highlights.isEmpty()) {
+                toolTipContent += tr("<div style=\"margin-top: 10px;\"><strong>Highlights</strong>:<br>%1</div>")
+                    .arg(highlights.join("\n").toHtmlEscaped().replace("\n", "<br>"));
+            }
+            toolTipContent += "</div></html>";
+            return toolTipContent;
         }
         return QVariant();
     }
@@ -422,6 +495,8 @@ FunctionsWidget::FunctionsWidget(MainWindow *main, QAction *action) :
     // Radare core found in:
     this->main = main;
 
+    setStyleSheet(QString("QToolTip { max-width: %2px; opacity: 230; }").arg(kMaxTooltipWidth));
+
     // leave the filter visible by default so users know it exists
     //ui->filterLineEdit->setVisible(false);