feat(ui): add tree view navigation with directional keys and Alt

Fixes #1007.

src/libs/browser/webcontrol.cpp

@@ -58,6 +58,11 @@ WebControl::WebControl(QWidget *parent)
     setLayout(layout);
 }
 
+void WebControl::focus()
+{
+    m_webView->setFocus();
+}
+
 int WebControl::zoomLevel() const
 {
     return m_webView->zoomLevel();
@@ -99,7 +104,6 @@ void WebControl::setWebBridgeObject(const QString &name, QObject *object)
 void WebControl::load(const QUrl &url)
 {
     m_webView->load(url);
-    m_webView->setFocus();
 }
 
 void WebControl::activateSearchBar()

src/libs/browser/webcontrol.h

@@ -41,6 +41,7 @@ class WebControl final : public QWidget
 public:
     explicit WebControl(QWidget *parent = nullptr);
 
+    void focus();
     void load(const QUrl &url);
     bool canGoBack() const;
     bool canGoForward() const;

src/libs/ui/browsertab.cpp

@@ -161,6 +161,8 @@ BrowserTab *BrowserTab::clone(QWidget *parent) const
 
     if (m_searchSidebar) {
         tab->m_searchSidebar = m_searchSidebar->clone();
+        connect(tab->m_searchSidebar, &SearchSidebar::activated,
+                tab->m_webControl, &Browser::WebControl::focus);
         connect(tab->m_searchSidebar, &SearchSidebar::navigationRequested,
                 tab->m_webControl, &Browser::WebControl::load);
     }
@@ -189,6 +191,8 @@ SearchSidebar *BrowserTab::searchSidebar()
     if (m_searchSidebar == nullptr) {
         // Create SearchSidebar managed by this tab.
         m_searchSidebar = new SearchSidebar();
+        connect(m_searchSidebar, &SearchSidebar::activated,
+                m_webControl, &Browser::WebControl::focus);
         connect(m_searchSidebar, &SearchSidebar::navigationRequested,
                 m_webControl, &Browser::WebControl::load);
     }

src/libs/ui/searchsidebar.cpp

@@ -41,6 +41,7 @@
 #include <QKeyEvent>
 #include <QListView>
 #include <QScrollBar>
+#include <QShortcut>
 #include <QSplitter>
 #include <QTimer>
 #include <QTreeView>
@@ -80,8 +81,20 @@ SearchSidebar::SearchSidebar(const SearchSidebar *other, QWidget *parent)
     delegate->setDecorationRoles({Registry::ItemDataRole::DocsetIconRole, Qt::DecorationRole});
     m_treeView->setItemDelegate(delegate);
 
-    connect(m_treeView, &QTreeView::activated, this, &SearchSidebar::indexActivated);
-    connect(m_treeView, &QTreeView::clicked, this, &SearchSidebar::indexActivated);
+    connect(m_treeView, &QTreeView::activated, this, &SearchSidebar::navigateToIndexAndActivate);
+    connect(m_treeView, &QTreeView::clicked, this, &SearchSidebar::navigateToIndex);
+
+    // Setup Alt+Up, Alt+Down, etc shortcuts.
+    const auto keyList = {Qt::Key_Up, Qt::Key_Down, Qt::Key_Left, Qt::Key_Right,
+                          Qt::Key_PageUp, Qt::Key_PageDown,
+                          Qt::Key_Home, Qt::Key_End};
+    for (const auto key : keyList) {
+        auto shortcut = new QShortcut(key | Qt::AltModifier, this);
+        connect(shortcut, &QShortcut::activated, this, [this, key]() {
+            QKeyEvent event(QKeyEvent::KeyPress, key, Qt::NoModifier);
+            QCoreApplication::sendEvent(m_treeView, &event);
+        });
+    }
 
     // Setup page TOC view.
     // TODO: Move to a separate Sidebar View.
@@ -106,8 +119,8 @@ SearchSidebar::SearchSidebar(const SearchSidebar *other, QWidget *parent)
     });
     m_pageTocView->setModel(m_pageTocModel);
 
-    connect(m_pageTocView, &QListView::activated, this, &SearchSidebar::indexActivated);
-    connect(m_pageTocView, &QListView::clicked, this, &SearchSidebar::indexActivated);
+    connect(m_pageTocView, &QListView::activated, this, &SearchSidebar::navigateToIndexAndActivate);
+    connect(m_pageTocView, &QListView::clicked, this, &SearchSidebar::navigateToIndex);
 
     // Setup search input box.
     m_searchEdit = new SearchEdit();
@@ -164,14 +177,7 @@ SearchSidebar::SearchSidebar(const SearchSidebar *other, QWidget *parent)
 
             // Connect to the new selection model.
             connect(m_treeView->selectionModel(), &QItemSelectionModel::selectionChanged,
-                    this, [this](const QItemSelection &selected) {
-                if (selected.isEmpty()) {
-                    return;
-                }
-
-                m_delayedNavigationTimer->setProperty("index", selected.indexes().first());
-                m_delayedNavigationTimer->start();
-            });
+                    this, &SearchSidebar::navigateToSelectionWithDelay);
         }
 
         m_treeView->reset();
@@ -213,10 +219,7 @@ SearchSidebar::SearchSidebar(const SearchSidebar *other, QWidget *parent)
             return;
         }
 
-        indexActivated(index);
-
-        // Get focus back.
-        m_searchEdit->setFocus(Qt::MouseFocusReason);
+        navigateToIndex(index);
     });
 
     // Setup Docset Registry.
@@ -274,14 +277,7 @@ void SearchSidebar::setTreeViewModel(QAbstractItemModel *model, bool isRootDecor
 
         // Connect to the new selection model.
         connect(m_treeView->selectionModel(), &QItemSelectionModel::selectionChanged,
-                this, [this](const QItemSelection &selected) {
-            if (selected.isEmpty()) {
-                return;
-            }
-
-            m_delayedNavigationTimer->setProperty("index", selected.indexes().first());
-            m_delayedNavigationTimer->start();
-        });
+                this, &SearchSidebar::navigateToSelectionWithDelay);
     }
 }
 
@@ -315,13 +311,41 @@ void SearchSidebar::search(const Registry::SearchQuery &query)
     m_searchEdit->setText(query.toString());
 }
 
-void SearchSidebar::indexActivated(const QModelIndex &index)
+void SearchSidebar::navigateToIndex(const QModelIndex &index)
+{
+    // When triggered by click, cancel delayed navigation request caused by the selection change.
+    if (m_delayedNavigationTimer->isActive()
+            && m_delayedNavigationTimer->property("index").toModelIndex() == index) {
+        m_delayedNavigationTimer->stop();
+    }
+
+    const QVariant url = index.data(Registry::ItemDataRole::UrlRole);
+    if (url.isNull()) {
+        return;
+    }
+
+    emit navigationRequested(url.toUrl());
+}
+
+void SearchSidebar::navigateToIndexAndActivate(const QModelIndex &index)
 {
     const QVariant url = index.data(Registry::ItemDataRole::UrlRole);
-    if (url.isNull())
+    if (url.isNull()) {
         return;
+    }
 
     emit navigationRequested(url.toUrl());
+    emit activated();
+}
+
+void SearchSidebar::navigateToSelectionWithDelay(const QItemSelection &selection)
+{
+    if (selection.isEmpty()) {
+        return;
+    }
+
+    m_delayedNavigationTimer->setProperty("index", selection.indexes().first());
+    m_delayedNavigationTimer->start();
 }
 
 void SearchSidebar::setupSearchBoxCompletions()
@@ -347,6 +371,9 @@ bool SearchSidebar::eventFilter(QObject *object, QEvent *event)
     if (object == m_searchEdit && event->type() == QEvent::KeyPress) {
         auto e = static_cast<QKeyEvent *>(event);
         switch (e->key()) {
+        case Qt::Key_Return:
+            emit activated();
+            break;
         case Qt::Key_Home:
         case Qt::Key_End:
         case Qt::Key_Left:
@@ -355,13 +382,13 @@ bool SearchSidebar::eventFilter(QObject *object, QEvent *event)
                 break;
             }
             [[clang::fallthrough]];
-        case Qt::Key_Return:
         case Qt::Key_Down:
         case Qt::Key_Up:
         case Qt::Key_PageDown:
         case Qt::Key_PageUp:
             QCoreApplication::sendEvent(m_treeView, event);
             break;
+
         }
     }
 

src/libs/ui/searchsidebar.h

@@ -28,6 +28,7 @@
 #include <QModelIndexList>
 #include <QWidget>
 
+class QItemSelection;
 class QSplitter;
 class QListView;
 class QTimer;
@@ -54,14 +55,17 @@ class SearchSidebar final : public Sidebar::View
     Registry::SearchModel *pageTocModel() const;
 
 signals:
+    void activated();
     void navigationRequested(const QUrl &url);
 
 public slots:
     void focusSearchEdit(bool clear = false);
     void search(const Registry::SearchQuery &query);
 
 private slots:
-    void indexActivated(const QModelIndex &index);
+    void navigateToIndex(const QModelIndex &index);
+    void navigateToIndexAndActivate(const QModelIndex &index);
+    void navigateToSelectionWithDelay(const QItemSelection &selection);
     void setupSearchBoxCompletions();
 
 protected: