[Client] Fix alt badge and trail review findings

- Drop the dead VPN warning branch: rowVisible() already hides IP rows
  above the threshold, so setVpnThreshold(), its member and the spin-box
  connect never took effect.
- Dim IP rows at shared_count > 2 instead of > 1: the count already
  includes the investigated account, so every IP row was dimmed.
- Truncate backStack when a breadcrumb is clicked instead of pushing the
  current user again, so the trail keeps a single path and Back works.
- Word-wrap the trail label so a long chain cannot widen the tab.
- Extract the status/match pill painting into widgets/utility/pill_painter
  and use it from both delegates instead of duplicating it.

cockatrice/CMakeLists.txt

@@ -287,6 +287,8 @@ set(cockatrice_SOURCES
     src/interface/widgets/utility/custom_line_edit.cpp
     src/interface/widgets/utility/epoch_format.h
     src/interface/widgets/utility/get_text_with_max.cpp
+    src/interface/widgets/utility/pill_painter.cpp
+    src/interface/widgets/utility/pill_painter.h
     src/interface/widgets/utility/report_utils.cpp
     src/interface/widgets/utility/report_utils.h
     src/interface/widgets/utility/table_activation.cpp

cockatrice/src/interface/widgets/tabs/alt_table_delegate.cpp

@@ -1,5 +1,7 @@
 #include "alt_table_delegate.h"
 
+#include "../utility/pill_painter.h"
+
 #include <QApplication>
 #include <QModelIndex>
 #include <QPainter>
@@ -9,9 +11,6 @@
 
 namespace
 {
-constexpr qreal PILL_ALPHA = 0.30;
-constexpr int PILL_PAD_X = 10;
-constexpr int PILL_PAD_Y = 4;
 constexpr int ICON_TEXT_GAP = 4;
 } // namespace
 
@@ -21,11 +20,6 @@ AltTableDelegate::AltTableDelegate(int viaColumn, int warnsColumn, int bansColum
 {
 }
 
-void AltTableDelegate::setVpnThreshold(int threshold)
-{
-    vpnThreshold = threshold;
-}
-
 void AltTableDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
 {
     const bool selected = (option.state & QStyle::State_Selected) != 0;
@@ -37,58 +31,27 @@ void AltTableDelegate::paint(QPainter *painter, const QStyleOptionViewItem &opti
     const QString text = index.data(Qt::DisplayRole).toString();
     const QPalette::ColorRole emphasisRole = selected ? QPalette::HighlightedText : QPalette::WindowText;
 
-    auto paintPill = [&](QPalette::ColorRole tintRole, QPalette::ColorRole textRole, const QIcon &icon,
-                         const QString &pillText) {
-        const QRect pillRect = opt.rect.adjusted(PILL_PAD_X / 2, PILL_PAD_Y / 2, -PILL_PAD_X / 2, -PILL_PAD_Y / 2);
-        if (pillRect.width() <= 0 || pillRect.height() <= 0) {
-            QStyledItemDelegate::paint(painter, opt, index);
-            return;
-        }
-        if (!selected) {
-            painter->save();
-            painter->setRenderHint(QPainter::Antialiasing, true);
-            QColor pill = opt.palette.color(tintRole);
-            pill.setAlphaF(PILL_ALPHA);
-            painter->setPen(Qt::NoPen);
-            painter->setBrush(pill);
-            painter->drawRoundedRect(pillRect, pillRect.height() / 2.0, pillRect.height() / 2.0);
-            painter->restore();
-        }
-
-        QRect textRect = pillRect;
-        if (!icon.isNull()) {
-            const int iconSize = qMin(pillRect.height(), pillRect.width());
-            if (iconSize > 0) {
-                const QRect iconRect(pillRect.left() + ICON_TEXT_GAP, pillRect.top(), iconSize, iconSize);
-                icon.paint(painter, iconRect);
-                textRect.setLeft(iconRect.right() + ICON_TEXT_GAP);
-            }
-        }
-        const QString elided = opt.fontMetrics.elidedText(pillText, opt.textElideMode, textRect.width());
-        style->drawItemText(painter, textRect, Qt::AlignCenter, opt.palette, true, elided, textRole);
-    };
-
     if (index.column() == viaColumn) {
         bool sharedOk = false;
         const unsigned shared = index.sibling(index.row(), sharedColumn).data(Qt::DisplayRole).toUInt(&sharedOk);
-        const bool dimmed = sharedOk && text.startsWith(QStringLiteral("ip:")) && shared > 1;
-        const bool vpn =
-            sharedOk && text.startsWith(QStringLiteral("ip:")) && shared > static_cast<unsigned>(vpnThreshold);
+        const bool ipMatch = text.startsWith(QStringLiteral("ip:"));
+        // shared_count for an IP match already includes the investigated account,
+        // so anything above 2 means the address is shared beyond that pair.
+        const bool dimmed = sharedOk && ipMatch && shared > 2;
         const QPalette::ColorRole textRole = (dimmed && !selected) ? QPalette::PlaceholderText : emphasisRole;
+
+        QPalette::ColorRole tintRole = QPalette::NoRole;
         if (text == QStringLiteral("email")) {
-            paintPill(QPalette::Link, emphasisRole, QIcon(), text);
-            return;
+            tintRole = QPalette::Link;
+        } else if (text.startsWith(QStringLiteral("clientid:"))) {
+            tintRole = QPalette::Highlight;
+        } else if (ipMatch) {
+            tintRole = QPalette::PlaceholderText;
         }
-        if (text.startsWith(QStringLiteral("clientid:"))) {
-            paintPill(QPalette::Highlight, emphasisRole, QIcon(), text);
-            return;
-        }
-        if (text.startsWith(QStringLiteral("ip:"))) {
-            if (vpn) {
-                paintPill(QPalette::Highlight, textRole, style->standardIcon(QStyle::SP_MessageBoxWarning), text);
-                return;
+        if (tintRole != QPalette::NoRole) {
+            if (!pill_painter::paint(painter, opt, tintRole, textRole, text)) {
+                QStyledItemDelegate::paint(painter, opt, index);
             }
-            paintPill(QPalette::PlaceholderText, textRole, QIcon(), text);
             return;
         }
         QStyledItemDelegate::paint(painter, opt, index);
@@ -123,7 +86,7 @@ QSize AltTableDelegate::sizeHint(const QStyleOptionViewItem &option, const QMode
 {
     const QSize hint = QStyledItemDelegate::sizeHint(option, index);
     if (index.column() == viaColumn) {
-        return hint + QSize(PILL_PAD_X + 2 * ICON_TEXT_GAP, PILL_PAD_Y);
+        return hint + QSize(pill_painter::PAD_X + 2 * ICON_TEXT_GAP, pill_painter::PAD_Y);
     }
     if (index.column() == warnsColumn || index.column() == bansColumn) {
         return hint + QSize(2 * ICON_TEXT_GAP, 0);

cockatrice/src/interface/widgets/tabs/alt_table_delegate.h

@@ -6,10 +6,10 @@
 
 /**
  * Badge + icon painting for the User Alts table. The match-evidence column
- * renders as a palette-tinted pill per match type (email / client id / IP),
- * with the style's warning icon once an IP is shared by more than the VPN
- * threshold. Warn/ban counts gain the style's warning/critical icons when
- * nonzero. Selected rows and unknown content fall back to default painting.
+ * renders as a palette-tinted pill per match type (email / client id / IP), and
+ * an IP shared by more than one other account is dimmed. Warn/ban counts gain
+ * the style's warning/critical icons when nonzero. Selected rows and unknown
+ * content fall back to default painting.
  */
 class AltTableDelegate : public QStyledItemDelegate
 {
@@ -20,7 +20,6 @@ public:
                               int bansColumn,
                               int sharedColumn,
                               QObject *parent = nullptr);
-    void setVpnThreshold(int threshold);
     void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
     [[nodiscard]] QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const override;
 
@@ -29,7 +28,6 @@ private:
     int warnsColumn;
     int bansColumn;
     int sharedColumn;
-    int vpnThreshold = 10;
 };
 
 #endif // ALT_TABLE_DELEGATE_H

cockatrice/src/interface/widgets/tabs/report_status_delegate.cpp

@@ -1,18 +1,13 @@
 #include "report_status_delegate.h"
 
+#include "../utility/pill_painter.h"
+
 #include <QApplication>
 #include <QPainter>
 #include <QPalette>
 #include <QStyle>
 #include <QStyleOptionViewItem>
 
-namespace
-{
-constexpr qreal PILL_ALPHA = 0.30;
-constexpr int PILL_PAD_X = 10;
-constexpr int PILL_PAD_Y = 4;
-} // namespace
-
 ReportStatusDelegate::ReportStatusDelegate(QObject *parent) : QStyledItemDelegate(parent)
 {
 }
@@ -46,32 +41,14 @@ void ReportStatusDelegate::paint(QPainter *painter, const QStyleOptionViewItem &
         return;
     }
 
-    const QRect pillRect = opt.rect.adjusted(PILL_PAD_X / 2, PILL_PAD_Y / 2, -PILL_PAD_X / 2, -PILL_PAD_Y / 2);
-    if (pillRect.width() <= 0 || pillRect.height() <= 0) {
-        QStyledItemDelegate::paint(painter, opt, index);
-        return;
-    }
-
-    if (!selected) {
-        painter->save();
-        painter->setRenderHint(QPainter::Antialiasing, true);
-        QColor pill = opt.palette.color(tintRole);
-        pill.setAlphaF(PILL_ALPHA);
-        painter->setPen(Qt::NoPen);
-        painter->setBrush(pill);
-        painter->drawRoundedRect(pillRect, pillRect.height() / 2.0, pillRect.height() / 2.0);
-        painter->restore();
-    }
-
-    const QString elided =
-        opt.fontMetrics.elidedText(opt.text.isEmpty() ? status : opt.text, opt.textElideMode, pillRect.width());
     const QPalette::ColorRole textRole = selected ? QPalette::HighlightedText : QPalette::WindowText;
-    QStyle *style = opt.widget != nullptr ? opt.widget->style() : QApplication::style();
-    style->drawItemText(painter, pillRect, Qt::AlignCenter, opt.palette, true, elided, textRole);
+    if (!pill_painter::paint(painter, opt, tintRole, textRole, opt.text.isEmpty() ? status : opt.text)) {
+        QStyledItemDelegate::paint(painter, opt, index);
+    }
 }
 
 QSize ReportStatusDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
 {
     const QSize hint = QStyledItemDelegate::sizeHint(option, index);
-    return hint + QSize(PILL_PAD_X, PILL_PAD_Y);
+    return hint + QSize(pill_painter::PAD_X, pill_painter::PAD_Y);
 }

cockatrice/src/interface/widgets/tabs/tab_alts.cpp

@@ -107,9 +107,12 @@ TabAlts::TabAlts(TabSupervisor *_tabSupervisor, AbstractClient *_client, const Q
     trailLabel->setTextFormat(Qt::RichText);
     trailLabel->setTextInteractionFlags(Qt::TextBrowserInteraction);
     trailLabel->setOpenExternalLinks(false);
+    // The trail grows with every hop, so let it wrap instead of forcing the tab
+    // wider than the window.
+    trailLabel->setWordWrap(true);
     connect(trailLabel, &QLabel::linkActivated, this, [this](const QString &userName) {
         if (!userName.isEmpty() && userName != currentUser) {
-            investigate(userName);
+            goToTrailEntry(userName);
         }
     });
 
@@ -147,8 +150,6 @@ TabAlts::TabAlts(TabSupervisor *_tabSupervisor, AbstractClient *_client, const Q
     altsTable = new QTableWidget(0, COL_ALTS_COUNT);
     configureAltTable(altsTable);
     altsDelegate = new AltTableDelegate(COL_ALTS_VIA, COL_ALTS_WARNS, COL_ALTS_BANS, COL_ALTS_SHARED, altsTable);
-    altsDelegate->setVpnThreshold(vpnSpin->value());
-    connect(vpnSpin, &QSpinBox::valueChanged, altsDelegate, &AltTableDelegate::setVpnThreshold);
     altsTable->setItemDelegateForColumn(COL_ALTS_VIA, altsDelegate);
     altsTable->setItemDelegateForColumn(COL_ALTS_WARNS, altsDelegate);
     altsTable->setItemDelegateForColumn(COL_ALTS_BANS, altsDelegate);
@@ -271,6 +272,20 @@ void TabAlts::investigate(const QString &userName)
     loadUser(userName);
 }
 
+void TabAlts::goToTrailEntry(const QString &userName)
+{
+    const int index = backStack.indexOf(userName);
+    if (index < 0) {
+        investigate(userName);
+        return;
+    }
+    // Clicking an earlier crumb truncates the history there instead of pushing
+    // another entry, so the trail keeps a single path and Back still works.
+    backStack.erase(backStack.begin() + index, backStack.end());
+    backButton->setEnabled(!backStack.isEmpty());
+    loadUser(userName);
+}
+
 void TabAlts::goBack()
 {
     if (backStack.isEmpty()) {
@@ -441,6 +456,8 @@ void TabAlts::renderTable()
         altsTable->setItem(row, COL_ALTS_WARNS, new QTableWidgetItem(QString::number(alt.warn_count())));
         altsTable->setItem(row, COL_ALTS_BANS, new QTableWidgetItem(QString::number(alt.ban_count())));
         altsTable->setItem(row, COL_ALTS_ACTIVE, new QTableWidgetItem(alt.is_active() ? tr("yes") : tr("no")));
+        // shared_count already includes the investigated account, so anything
+        // above 2 means the address is shared beyond that pair.
         if (QString::fromStdString(alt.match_reason()).startsWith(QStringLiteral("ip:")) && alt.has_shared_count() &&
             alt.shared_count() > 2) {
             for (int col = 0; col < COL_ALTS_COUNT; ++col) {

cockatrice/src/interface/widgets/tabs/tab_alts.h

@@ -52,6 +52,7 @@ private slots:
 
 private:
     void loadUser(const QString &userName);
+    void goToTrailEntry(const QString &userName);
     void updateTrail();
     void requestAlts(const QString &userName, int depth);
     void requestDetails(const QString &userName);

cockatrice/src/interface/widgets/utility/pill_painter.cpp

@@ -0,0 +1,41 @@
+#include "pill_painter.h"
+
+#include <QApplication>
+#include <QFontMetrics>
+#include <QPainter>
+#include <QRect>
+#include <QStyle>
+#include <QStyleOptionViewItem>
+
+namespace
+{
+constexpr qreal PILL_ALPHA = 0.30;
+} // namespace
+
+bool pill_painter::paint(QPainter *painter,
+                         const QStyleOptionViewItem &option,
+                         QPalette::ColorRole tintRole,
+                         QPalette::ColorRole textRole,
+                         const QString &text)
+{
+    const QRect pillRect = option.rect.adjusted(PAD_X / 2, PAD_Y / 2, -PAD_X / 2, -PAD_Y / 2);
+    if (pillRect.width() <= 0 || pillRect.height() <= 0) {
+        return false;
+    }
+
+    if ((option.state & QStyle::State_Selected) == 0) {
+        painter->save();
+        painter->setRenderHint(QPainter::Antialiasing, true);
+        QColor pill = option.palette.color(tintRole);
+        pill.setAlphaF(PILL_ALPHA);
+        painter->setPen(Qt::NoPen);
+        painter->setBrush(pill);
+        painter->drawRoundedRect(pillRect, pillRect.height() / 2.0, pillRect.height() / 2.0);
+        painter->restore();
+    }
+
+    QStyle *style = option.widget != nullptr ? option.widget->style() : QApplication::style();
+    const QString elided = option.fontMetrics.elidedText(text, option.textElideMode, pillRect.width());
+    style->drawItemText(painter, pillRect, Qt::AlignCenter, option.palette, true, elided, textRole);
+    return true;
+}

cockatrice/src/interface/widgets/utility/pill_painter.h

@@ -0,0 +1,29 @@
+#ifndef PILL_PAINTER_H
+#define PILL_PAINTER_H
+
+#include <QPalette>
+#include <QString>
+
+class QPainter;
+class QStyleOptionViewItem;
+
+namespace pill_painter
+{
+constexpr int PAD_X = 10;
+constexpr int PAD_Y = 4;
+
+/**
+ * Draws a translucent, palette-tinted rounded pill inside the option's rect and
+ * paints the text elided and centred on it, so badges follow the active theme.
+ * Returns false when the cell is too small to hold a pill, leaving the caller to
+ * fall back to default painting.
+ */
+bool paint(QPainter *painter,
+           const QStyleOptionViewItem &option,
+           QPalette::ColorRole tintRole,
+           QPalette::ColorRole textRole,
+           const QString &text);
+
+} // namespace pill_painter
+
+#endif // PILL_PAINTER_H