Everywhere: Rename left/right-click to primary/secondary

This resolves #10641.

Userland/Applets/Audio/main.cpp

@@ -120,14 +120,14 @@ public:
 private:
     virtual void mousedown_event(GUI::MouseEvent& event) override
     {
-        if (event.button() == GUI::MouseButton::Left) {
+        if (event.button() == GUI::MouseButton::Primary) {
             if (!m_slider_window->is_visible())
                 open();
             else
                 close();
             return;
         }
-        if (event.button() == GUI::MouseButton::Right) {
+        if (event.button() == GUI::MouseButton::Secondary) {
             m_audio_client->set_muted(!m_audio_muted);
             update();
         }

Userland/Applets/Network/main.cpp

@@ -36,7 +36,7 @@ private:
 
     virtual void mousedown_event(GUI::MouseEvent& event) override
     {
-        if (event.button() != GUI::MouseButton::Left)
+        if (event.button() != GUI::MouseButton::Primary)
             return;
 
         pid_t child_pid;

Userland/Applets/ResourceGraph/main.cpp

@@ -106,7 +106,7 @@ private:
 
     virtual void mousedown_event(GUI::MouseEvent& event) override
     {
-        if (event.button() != GUI::MouseButton::Left)
+        if (event.button() != GUI::MouseButton::Primary)
             return;
         pid_t child_pid;
         const char* argv[] = { "SystemMonitor", "-t", "graphs", nullptr };

Userland/Applications/3DFileViewer/main.cpp

@@ -132,7 +132,7 @@ void GLContextWidget::resize_event(GUI::ResizeEvent& event)
 
 void GLContextWidget::mousemove_event(GUI::MouseEvent& event)
 {
-    if (event.buttons() == GUI::MouseButton::Left) {
+    if (event.buttons() == GUI::MouseButton::Primary) {
         int delta_x = m_last_mouse.x() - event.x();
         int delta_y = m_last_mouse.y() - event.y();
 

Userland/Applications/FontEditor/GlyphEditorWidget.cpp

@@ -195,7 +195,7 @@ void GlyphEditorWidget::mousemove_event(GUI::MouseEvent& event)
 {
     if (!m_is_clicking_valid_cell)
         return;
-    if (!(event.buttons() & (GUI::MouseButton::Left | GUI::MouseButton::Right)))
+    if (!(event.buttons() & (GUI::MouseButton::Primary | GUI::MouseButton::Secondary)))
         return;
     if (mode() == Paint)
         draw_at_mouse(event);
@@ -213,8 +213,8 @@ void GlyphEditorWidget::enter_event(Core::Event&)
 
 void GlyphEditorWidget::draw_at_mouse(const GUI::MouseEvent& event)
 {
-    bool set = event.buttons() & GUI::MouseButton::Left;
+    bool set = event.buttons() & GUI::MouseButton::Primary;
-    bool unset = event.buttons() & GUI::MouseButton::Right;
+    bool unset = event.buttons() & GUI::MouseButton::Secondary;
     if (!(set ^ unset))
         return;
     int x = (event.x() - 1) / m_scale;

Userland/Applications/FontEditor/NewFontDialog.cpp

@@ -93,13 +93,13 @@ private:
     }
     virtual void mousemove_event(MouseEvent& event) override
     {
-        if (event.buttons() & (GUI::MouseButton::Left | GUI::MouseButton::Right))
+        if (event.buttons() & (GUI::MouseButton::Primary | GUI::MouseButton::Secondary))
             draw_at_mouse(event);
     }
     void draw_at_mouse(const MouseEvent& event)
     {
-        bool set = event.buttons() & MouseButton::Left;
+        bool set = event.buttons() & MouseButton::Primary;
-        bool unset = event.buttons() & MouseButton::Right;
+        bool unset = event.buttons() & MouseButton::Secondary;
         if (!(set ^ unset))
             return;
         int x = (event.x() - 1) / m_scale;

Userland/Applications/HexEditor/HexEditor.cpp

@@ -195,7 +195,7 @@ void HexEditor::set_content_length(int length)
 
 void HexEditor::mousedown_event(GUI::MouseEvent& event)
 {
-    if (event.button() != GUI::MouseButton::Left) {
+    if (event.button() != GUI::MouseButton::Primary) {
         return;
     }
 
@@ -308,7 +308,7 @@ void HexEditor::mousemove_event(GUI::MouseEvent& event)
 
 void HexEditor::mouseup_event(GUI::MouseEvent& event)
 {
-    if (event.button() == GUI::MouseButton::Left) {
+    if (event.button() == GUI::MouseButton::Primary) {
         if (m_in_drag_select) {
             if (m_selection_end < m_selection_start) {
                 // lets flip these around

Userland/Applications/ImageViewer/ViewWidget.cpp

@@ -184,7 +184,7 @@ void ViewWidget::paint_event(GUI::PaintEvent& event)
 
 void ViewWidget::mousedown_event(GUI::MouseEvent& event)
 {
-    if (event.button() != GUI::MouseButton::Left)
+    if (event.button() != GUI::MouseButton::Primary)
         return;
     m_click_position = event.position();
     m_saved_pan_origin = m_pan_origin;
@@ -194,7 +194,7 @@ void ViewWidget::mouseup_event([[maybe_unused]] GUI::MouseEvent& event) { }
 
 void ViewWidget::mousemove_event(GUI::MouseEvent& event)
 {
-    if (!(event.buttons() & GUI::MouseButton::Left))
+    if (!(event.buttons() & GUI::MouseButton::Primary))
         return;
 
     auto delta = event.position() - m_click_position;

Userland/Applications/Piano/KeysWidget.cpp

@@ -270,7 +270,7 @@ int KeysWidget::note_for_event_position(const Gfx::IntPoint& a_point) const
 
 void KeysWidget::mousedown_event(GUI::MouseEvent& event)
 {
-    if (event.button() != GUI::MouseButton::Left)
+    if (event.button() != GUI::MouseButton::Primary)
         return;
 
     m_mouse_down = true;
@@ -283,7 +283,7 @@ void KeysWidget::mousedown_event(GUI::MouseEvent& event)
 
 void KeysWidget::mouseup_event(GUI::MouseEvent& event)
 {
-    if (event.button() != GUI::MouseButton::Left)
+    if (event.button() != GUI::MouseButton::Primary)
         return;
 
     m_mouse_down = false;

Userland/Applications/PixelPaint/ImageEditor.cpp

@@ -501,18 +501,18 @@ void ImageEditor::layers_did_change()
 
 Color ImageEditor::color_for(GUI::MouseButton button) const
 {
-    if (button == GUI::MouseButton::Left)
+    if (button == GUI::MouseButton::Primary)
         return m_primary_color;
-    if (button == GUI::MouseButton::Right)
+    if (button == GUI::MouseButton::Secondary)
         return m_secondary_color;
     VERIFY_NOT_REACHED();
 }
 
 Color ImageEditor::color_for(GUI::MouseEvent const& event) const
 {
-    if (event.buttons() & GUI::MouseButton::Left)
+    if (event.buttons() & GUI::MouseButton::Primary)
         return m_primary_color;
-    if (event.buttons() & GUI::MouseButton::Right)
+    if (event.buttons() & GUI::MouseButton::Secondary)
         return m_secondary_color;
     VERIFY_NOT_REACHED();
 }

Userland/Applications/PixelPaint/LayerListWidget.cpp

@@ -146,7 +146,7 @@ void LayerListWidget::mousedown_event(GUI::MouseEvent& event)
 {
     if (!m_image)
         return;
-    if (event.button() != GUI::MouseButton::Left)
+    if (event.button() != GUI::MouseButton::Primary)
         return;
 
     Gfx::IntPoint translated_event_point = { 0, vertical_scrollbar().value() + event.y() };
@@ -201,7 +201,7 @@ void LayerListWidget::mouseup_event(GUI::MouseEvent& event)
 {
     if (!m_image)
         return;
-    if (event.button() != GUI::MouseButton::Left)
+    if (event.button() != GUI::MouseButton::Primary)
         return;
     if (!m_moving_gadget_index.has_value())
         return;

Userland/Applications/PixelPaint/PaletteWidget.cpp

@@ -50,9 +50,9 @@ public:
             }
         }
 
-        if (event.button() == GUI::MouseButton::Left)
+        if (event.button() == GUI::MouseButton::Primary)
             m_palette_widget.set_primary_color(m_color);
-        else if (event.button() == GUI::MouseButton::Right)
+        else if (event.button() == GUI::MouseButton::Secondary)
             m_palette_widget.set_secondary_color(m_color);
     }
 
@@ -69,7 +69,7 @@ public:
 
     virtual void mousedown_event(GUI::MouseEvent& event) override
     {
-        if (event.button() != GUI::MouseButton::Left || !on_color_change)
+        if (event.button() != GUI::MouseButton::Primary || !on_color_change)
             return;
 
         auto dialog = GUI::ColorPicker::construct(m_color, window());

Userland/Applications/PixelPaint/Tools/BrushTool.cpp

@@ -32,7 +32,7 @@ void BrushTool::on_mousedown(Layer* layer, MouseEvent& event)
         return;
 
     auto& layer_event = event.layer_event();
-    if (layer_event.button() != GUI::MouseButton::Left && layer_event.button() != GUI::MouseButton::Right)
+    if (layer_event.button() != GUI::MouseButton::Primary && layer_event.button() != GUI::MouseButton::Secondary)
         return;
 
     // Shift+Click draws a line from the last position to current one.
@@ -60,7 +60,7 @@ void BrushTool::on_mousemove(Layer* layer, MouseEvent& event)
         return;
 
     auto& layer_event = event.layer_event();
-    if (!(layer_event.buttons() & GUI::MouseButton::Left || layer_event.buttons() & GUI::MouseButton::Right))
+    if (!(layer_event.buttons() & GUI::MouseButton::Primary || layer_event.buttons() & GUI::MouseButton::Secondary))
         return;
 
     draw_line(layer->bitmap(), color_for(layer_event), m_last_position, layer_event.position());

Userland/Applications/PixelPaint/Tools/EllipseTool.cpp

@@ -56,7 +56,7 @@ void EllipseTool::on_mousedown(Layer* layer, MouseEvent& event)
         return;
 
     auto& layer_event = event.layer_event();
-    if (layer_event.button() != GUI::MouseButton::Left && layer_event.button() != GUI::MouseButton::Right)
+    if (layer_event.button() != GUI::MouseButton::Primary && layer_event.button() != GUI::MouseButton::Secondary)
         return;
 
     if (m_drawing_button != GUI::MouseButton::None)

Userland/Applications/PixelPaint/Tools/GuideTool.cpp

@@ -56,7 +56,7 @@ void GuideTool::on_mousedown(Layer*, MouseEvent& event)
 
     auto& image_event = event.image_event();
 
-    if (image_event.button() != GUI::MouseButton::Left)
+    if (image_event.button() != GUI::MouseButton::Primary)
         return;
 
     m_editor->set_guide_visibility(true);

Userland/Applications/PixelPaint/Tools/LineTool.cpp

@@ -45,7 +45,7 @@ void LineTool::on_mousedown(Layer* layer, MouseEvent& event)
         return;
 
     auto& layer_event = event.layer_event();
-    if (layer_event.button() != GUI::MouseButton::Left && layer_event.button() != GUI::MouseButton::Right)
+    if (layer_event.button() != GUI::MouseButton::Primary && layer_event.button() != GUI::MouseButton::Secondary)
         return;
 
     if (m_drawing_button != GUI::MouseButton::None)

Userland/Applications/PixelPaint/Tools/MoveTool.cpp

@@ -24,7 +24,7 @@ MoveTool::~MoveTool()
 
 void MoveTool::on_mousedown(Layer* layer, MouseEvent& event)
 {
-    if (event.image_event().button() == GUI::MouseButton::Right && !m_is_panning) {
+    if (event.image_event().button() == GUI::MouseButton::Secondary && !m_is_panning) {
         m_is_panning = true;
         m_event_origin = event.raw_event().position();
         m_saved_pan_origin = m_editor->pan_origin();
@@ -37,7 +37,7 @@ void MoveTool::on_mousedown(Layer* layer, MouseEvent& event)
 
     auto& layer_event = event.layer_event();
     auto& image_event = event.image_event();
-    if (layer_event.button() != GUI::MouseButton::Left)
+    if (layer_event.button() != GUI::MouseButton::Primary)
         return;
     if (!layer->rect().contains(layer_event.position()))
         return;
@@ -70,7 +70,7 @@ void MoveTool::on_mousemove(Layer* layer, MouseEvent& event)
 
 void MoveTool::on_mouseup(Layer* layer, MouseEvent& event)
 {
-    if (event.image_event().button() == GUI::MouseButton::Right && m_is_panning) {
+    if (event.image_event().button() == GUI::MouseButton::Secondary && m_is_panning) {
         m_is_panning = false;
         m_editor->set_override_cursor(cursor());
         return;
@@ -80,7 +80,7 @@ void MoveTool::on_mouseup(Layer* layer, MouseEvent& event)
         return;
 
     auto& layer_event = event.layer_event();
-    if (layer_event.button() != GUI::MouseButton::Left)
+    if (layer_event.button() != GUI::MouseButton::Primary)
         return;
     m_layer_being_moved = nullptr;
     m_editor->did_complete_action();

Userland/Applications/PixelPaint/Tools/PickerTool.cpp

@@ -38,9 +38,9 @@ void PickerTool::on_mousedown(Layer* layer, MouseEvent& event)
     if (!color.alpha())
         return;
 
-    if (event.layer_event().button() == GUI::MouseButton::Left)
+    if (event.layer_event().button() == GUI::MouseButton::Primary)
         m_editor->set_primary_color(color);
-    else if (event.layer_event().button() == GUI::MouseButton::Right)
+    else if (event.layer_event().button() == GUI::MouseButton::Secondary)
         m_editor->set_secondary_color(color);
 }
 

Userland/Applications/PixelPaint/Tools/RectangleSelectTool.cpp

@@ -29,7 +29,7 @@ RectangleSelectTool::~RectangleSelectTool()
 void RectangleSelectTool::on_mousedown(Layer*, MouseEvent& event)
 {
     auto& image_event = event.image_event();
-    if (image_event.button() != GUI::MouseButton::Left)
+    if (image_event.button() != GUI::MouseButton::Primary)
         return;
 
     m_selecting = true;
@@ -61,7 +61,7 @@ void RectangleSelectTool::on_mousemove(Layer*, MouseEvent& event)
 void RectangleSelectTool::on_mouseup(Layer*, MouseEvent& event)
 {
     auto& image_event = event.image_event();
-    if (!m_selecting || image_event.button() != GUI::MouseButton::Left)
+    if (!m_selecting || image_event.button() != GUI::MouseButton::Primary)
         return;
 
     m_selecting = false;

Userland/Applications/PixelPaint/Tools/RectangleTool.cpp

@@ -59,7 +59,7 @@ void RectangleTool::on_mousedown(Layer* layer, MouseEvent& event)
         return;
 
     auto& layer_event = event.layer_event();
-    if (layer_event.button() != GUI::MouseButton::Left && layer_event.button() != GUI::MouseButton::Right)
+    if (layer_event.button() != GUI::MouseButton::Primary && layer_event.button() != GUI::MouseButton::Secondary)
         return;
 
     if (m_drawing_button != GUI::MouseButton::None)

Userland/Applications/PixelPaint/Tools/ZoomTool.cpp

@@ -23,10 +23,10 @@ ZoomTool::~ZoomTool()
 void ZoomTool::on_mousedown(Layer*, MouseEvent& event)
 {
     auto& raw_event = event.raw_event();
-    if (raw_event.button() != GUI::MouseButton::Left && raw_event.button() != GUI::MouseButton::Right)
+    if (raw_event.button() != GUI::MouseButton::Primary && raw_event.button() != GUI::MouseButton::Secondary)
         return;
 
-    auto scale_factor = (raw_event.button() == GUI::MouseButton::Left) ? m_sensitivity : -m_sensitivity;
+    auto scale_factor = (raw_event.button() == GUI::MouseButton::Primary) ? m_sensitivity : -m_sensitivity;
     m_editor->scale_centered_on_position(raw_event.position(), scale_factor);
 }
 

Userland/Applications/SoundPlayer/PlaylistWidget.cpp

@@ -95,7 +95,7 @@ String PlaylistModel::column_name(int column) const
 void PlaylistTableView::doubleclick_event(GUI::MouseEvent& event)
 {
     AbstractView::doubleclick_event(event);
-    if (event.button() == GUI::Left) {
+    if (event.button() == GUI::Primary) {
         if (on_doubleclick)
             on_doubleclick(event.position());
     }

Userland/Applications/SpaceAnalyzer/TreeMapWidget.cpp

@@ -299,7 +299,7 @@ void TreeMapWidget::mousedown_event(GUI::MouseEvent& event)
 
 void TreeMapWidget::doubleclick_event(GUI::MouseEvent& event)
 {
-    if (event.button() != GUI::MouseButton::Left)
+    if (event.button() != GUI::MouseButton::Primary)
         return;
     const TreeMapNode* node = path_node(m_viewpoint);
     if (node && !node_is_leaf(*node)) {

Userland/Applications/Spreadsheet/SpreadsheetView.cpp

@@ -81,7 +81,7 @@ void InfinitelyScrollableTableView::mousemove_event(GUI::MouseEvent& event)
         sheet.disable_updates();
         ScopeGuard sheet_update_enabler { [&] { sheet.enable_updates(); } };
 
-        auto holding_left_button = !!(event.buttons() & GUI::MouseButton::Left);
+        auto holding_left_button = !!(event.buttons() & GUI::MouseButton::Primary);
         if (m_is_dragging_for_copy) {
             set_override_cursor(Gfx::StandardCursor::Crosshair);
             m_should_intercept_drag = false;

Userland/Demos/CatDog/CatDog.cpp

@@ -122,7 +122,7 @@ void CatDog::track_mouse_move(Gfx::IntPoint const& point)
 
 void CatDog::mousedown_event(GUI::MouseEvent& event)
 {
-    if (event.button() != GUI::MouseButton::Left)
+    if (event.button() != GUI::MouseButton::Primary)
         return;
     if (on_click)
         on_click();

Userland/Demos/CatDog/SpeechBubble.cpp

@@ -43,7 +43,7 @@ void SpeechBubble::paint_event(GUI::PaintEvent&)
 
 void SpeechBubble::mousedown_event(GUI::MouseEvent& event)
 {
-    if (event.button() != GUI::MouseButton::Left)
+    if (event.button() != GUI::MouseButton::Primary)
         return;
     if (on_dismiss)
         on_dismiss();

Userland/Demos/Fire/Fire.cpp

@@ -164,7 +164,7 @@ void Fire::timer_event(Core::TimerEvent&)
 
 void Fire::mousedown_event(GUI::MouseEvent& event)
 {
-    if (event.button() == GUI::MouseButton::Left)
+    if (event.button() == GUI::MouseButton::Primary)
         dragging = true;
 
     return GUI::Widget::mousedown_event(event);
@@ -189,7 +189,7 @@ void Fire::mousemove_event(GUI::MouseEvent& event)
 
 void Fire::mouseup_event(GUI::MouseEvent& event)
 {
-    if (event.button() == GUI::MouseButton::Left)
+    if (event.button() == GUI::MouseButton::Primary)
         dragging = false;
 
     return GUI::Widget::mouseup_event(event);

Userland/Demos/Mandelbrot/Mandelbrot.cpp

@@ -283,7 +283,7 @@ void Mandelbrot::paint_event(GUI::PaintEvent& event)
 
 void Mandelbrot::mousedown_event(GUI::MouseEvent& event)
 {
-    if (event.button() == GUI::MouseButton::Left) {
+    if (event.button() == GUI::MouseButton::Primary) {
         if (!m_dragging) {
             m_selection_start = event.position();
             m_selection_end = event.position();
@@ -328,7 +328,7 @@ void Mandelbrot::mousemove_event(GUI::MouseEvent& event)
 
 void Mandelbrot::mouseup_event(GUI::MouseEvent& event)
 {
-    if (event.button() == GUI::MouseButton::Left) {
+    if (event.button() == GUI::MouseButton::Primary) {
         auto selection = Gfx::IntRect::from_two_points(m_selection_start, m_selection_end);
         if (selection.width() > 0 && selection.height() > 0)
             m_set.zoom(selection);
@@ -337,7 +337,7 @@ void Mandelbrot::mouseup_event(GUI::MouseEvent& event)
     } else if (event.button() == GUI::MouseButton::Middle) {
         m_panning = false;
         update();
-    } else if (event.button() == GUI::MouseButton::Right) {
+    } else if (event.button() == GUI::MouseButton::Secondary) {
         reset();
     }
 

Userland/Demos/Mouse/main.cpp

@@ -73,8 +73,8 @@ public:
         painter.stroke_path(path, Color::Black, 1);
 
         auto primary_secondary_switched = GUI::WindowServerConnection::the().get_buttons_switched();
-        auto primary_pressed = m_buttons & GUI::MouseButton::Left;
+        auto primary_pressed = m_buttons & GUI::MouseButton::Primary;
-        auto secondary_pressed = m_buttons & GUI::MouseButton::Right;
+        auto secondary_pressed = m_buttons & GUI::MouseButton::Secondary;
 
         if (primary_secondary_switched ? secondary_pressed : primary_pressed) {
             painter.fill_rect({ 31, 21, 34, 44 }, Color::Blue);

Userland/DevTools/HackStudio/Editor.cpp

@@ -311,7 +311,7 @@ void Editor::mousedown_event(GUI::MouseEvent& event)
 
     auto text_position = text_position_at(event.position());
     auto ruler_line_rect = ruler_content_rect(text_position.line());
-    if (event.button() == GUI::MouseButton::Left && event.position().x() < ruler_line_rect.width()) {
+    if (event.button() == GUI::MouseButton::Primary && event.position().x() < ruler_line_rect.width()) {
         if (!breakpoint_lines().contains_slow(text_position.line())) {
             breakpoint_lines().append(text_position.line());
             Debugger::the().on_breakpoint_change(wrapper().filename_label().text(), text_position.line(), BreakpointChange::Added);

Userland/DevTools/HackStudio/Git/GitFilesView.cpp

@@ -37,7 +37,7 @@ GitFilesView::GitFilesView(GitFileActionCallback callback, NonnullRefPtr<Gfx::Bi
 
 void GitFilesView::mousedown_event(GUI::MouseEvent& event)
 {
-    if (event.button() != GUI::MouseButton::Left) {
+    if (event.button() != GUI::MouseButton::Primary) {
         ListView::mousedown_event(event);
         return;
     }

Userland/DevTools/Profiler/FlameGraphView.cpp

@@ -88,7 +88,7 @@ void FlameGraphView::mousemove_event(GUI::MouseEvent& event)
 
 void FlameGraphView::mousedown_event(GUI::MouseEvent& event)
 {
-    if (event.button() != GUI::MouseButton::Left)
+    if (event.button() != GUI::MouseButton::Primary)
         return;
 
     if (!m_hovered_bar)

Userland/DevTools/Profiler/TimelineHeader.cpp

@@ -66,7 +66,7 @@ void TimelineHeader::update_selection()
 
 void TimelineHeader::mousedown_event(GUI::MouseEvent& event)
 {
-    if (event.button() != GUI::MouseButton::Left)
+    if (event.button() != GUI::MouseButton::Primary)
         return;
     m_selected = !m_selected;
     on_selection_change(m_selected);

Userland/DevTools/Profiler/TimelineView.cpp

@@ -31,7 +31,7 @@ u64 TimelineView::timestamp_at_x(int x) const
 
 void TimelineView::mousedown_event(GUI::MouseEvent& event)
 {
-    if (event.button() != GUI::MouseButton::Left)
+    if (event.button() != GUI::MouseButton::Primary)
         return;
 
     set_selecting(true);
@@ -55,7 +55,7 @@ void TimelineView::mousemove_event(GUI::MouseEvent& event)
 
 void TimelineView::mouseup_event(GUI::MouseEvent& event)
 {
-    if (event.button() != GUI::MouseButton::Left)
+    if (event.button() != GUI::MouseButton::Primary)
         return;
 
     set_selecting(false);

Userland/Games/Chess/ChessWidget.cpp

@@ -176,7 +176,7 @@ void ChessWidget::mousedown_event(GUI::MouseEvent& event)
     if (!frame_inner_rect().contains(event.position()))
         return;
 
-    if (event.button() == GUI::MouseButton::Right) {
+    if (event.button() == GUI::MouseButton::Secondary) {
         if (m_dragging_piece) {
             m_dragging_piece = false;
             set_override_cursor(Gfx::StandardCursor::None);
@@ -212,7 +212,7 @@ void ChessWidget::mouseup_event(GUI::MouseEvent& event)
     if (!frame_inner_rect().contains(event.position()))
         return;
 
-    if (event.button() == GUI::MouseButton::Right) {
+    if (event.button() == GUI::MouseButton::Secondary) {
         m_current_marking.secondary_color = event.shift();
         m_current_marking.alternate_color = event.ctrl();
         m_current_marking.to = mouse_to_square(event);

Userland/Games/GameOfLife/BoardWidget.cpp

@@ -168,7 +168,7 @@ void BoardWidget::paint_event(GUI::PaintEvent& event)
 
 void BoardWidget::mousedown_event(GUI::MouseEvent& event)
 {
-    if (event.button() == GUI::MouseButton::Left) {
+    if (event.button() == GUI::MouseButton::Primary) {
         set_toggling_cells(true);
         auto row_and_column = get_row_and_column_for_point(event.x(), event.y());
         if (!row_and_column.has_value())

Userland/Games/Hearts/Game.cpp

@@ -728,7 +728,7 @@ void Game::mouseup_event(GUI::MouseEvent& event)
 {
     GUI::Frame::mouseup_event(event);
 
-    if (event.button() != GUI::MouseButton::Left)
+    if (event.button() != GUI::MouseButton::Primary)
         return;
 
     if (!m_human_can_play)

Userland/Games/Minesweeper/Field.cpp

@@ -19,14 +19,14 @@ class SquareButton final : public GUI::Button {
     C_OBJECT(SquareButton);
 
 public:
-    Function<void()> on_right_click;
+    Function<void()> on_secondary_click;
     Function<void()> on_middle_click;
 
     virtual void mousedown_event(GUI::MouseEvent& event) override
     {
-        if (event.button() == GUI::MouseButton::Right) {
+        if (event.button() == GUI::MouseButton::Secondary) {
-            if (on_right_click)
+            if (on_secondary_click)
-                on_right_click();
+                on_secondary_click();
         }
         if (event.button() == GUI::MouseButton::Middle) {
             if (on_middle_click)
@@ -50,8 +50,8 @@ public:
 
     virtual void mousedown_event(GUI::MouseEvent& event) override
     {
-        if (event.button() == GUI::MouseButton::Right || event.button() == GUI::MouseButton::Left) {
+        if (event.button() == GUI::MouseButton::Secondary || event.button() == GUI::MouseButton::Primary) {
-            if (event.buttons() == (GUI::MouseButton::Right | GUI::MouseButton::Left) || m_square.field->is_single_chording()) {
+            if (event.buttons() == (GUI::MouseButton::Secondary | GUI::MouseButton::Primary) || m_square.field->is_single_chording()) {
                 m_chord = true;
                 m_square.field->set_chord_preview(m_square, true);
             }
@@ -82,7 +82,7 @@ public:
     virtual void mouseup_event(GUI::MouseEvent& event) override
     {
         if (m_chord) {
-            if (event.button() == GUI::MouseButton::Left || event.button() == GUI::MouseButton::Right) {
+            if (event.button() == GUI::MouseButton::Primary || event.button() == GUI::MouseButton::Secondary) {
                 if (rect().contains(event.position())) {
                     if (on_chord_click)
                         on_chord_click();
@@ -248,8 +248,8 @@ void Field::reset()
                 square.button->on_click = [this, &square](auto) {
                     on_square_clicked(square);
                 };
-                square.button->on_right_click = [this, &square] {
+                square.button->on_secondary_click = [this, &square] {
-                    on_square_right_clicked(square);
+                    on_square_secondary_clicked(square);
                 };
                 square.button->on_middle_click = [this, &square] {
                     on_square_middle_clicked(square);
@@ -385,7 +385,7 @@ void Field::on_square_chorded(Square& square)
     });
 }
 
-void Field::on_square_right_clicked(Square& square)
+void Field::on_square_secondary_clicked(Square& square)
 {
     if (square.is_swept)
         return;

Userland/Games/Minesweeper/Field.h

@@ -61,7 +61,7 @@ private:
     virtual void paint_event(GUI::PaintEvent&) override;
 
     void on_square_clicked(Square&);
-    void on_square_right_clicked(Square&);
+    void on_square_secondary_clicked(Square&);
     void on_square_middle_clicked(Square&);
     void on_square_chorded(Square&);
     void game_over();

Userland/Libraries/LibGUI/AbstractButton.cpp

@@ -96,7 +96,7 @@ void AbstractButton::mousemove_event(MouseEvent& event)
 {
     bool is_over = rect().contains(event.position());
     m_hovered = is_over;
-    if (event.buttons() & MouseButton::Left) {
+    if (event.buttons() & MouseButton::Primary) {
         bool being_pressed = is_over;
         if (being_pressed != m_being_pressed) {
             m_being_pressed = being_pressed;
@@ -114,7 +114,7 @@ void AbstractButton::mousemove_event(MouseEvent& event)
 
 void AbstractButton::mousedown_event(MouseEvent& event)
 {
-    if (event.button() == MouseButton::Left) {
+    if (event.button() == MouseButton::Primary) {
         m_being_pressed = true;
         repaint();
 
@@ -129,7 +129,7 @@ void AbstractButton::mousedown_event(MouseEvent& event)
 
 void AbstractButton::mouseup_event(MouseEvent& event)
 {
-    if (event.button() == MouseButton::Left && m_being_pressed) {
+    if (event.button() == MouseButton::Primary && m_being_pressed) {
         bool was_auto_repeating = m_auto_repeat_timer->is_active();
         m_auto_repeat_timer->stop();
         bool was_being_pressed = m_being_pressed;

Userland/Libraries/LibGUI/AbstractTableView.cpp

@@ -207,7 +207,7 @@ void AbstractTableView::mousedown_event(MouseEvent& event)
     if (!model())
         return AbstractView::mousedown_event(event);
 
-    if (event.button() != MouseButton::Left)
+    if (event.button() != MouseButton::Primary)
         return AbstractView::mousedown_event(event);
 
     bool is_toggle;

Userland/Libraries/LibGUI/AbstractView.cpp

@@ -224,7 +224,7 @@ void AbstractView::mousedown_event(MouseEvent& event)
     if (!model())
         return;
 
-    if (event.button() == MouseButton::Left)
+    if (event.button() == MouseButton::Primary)
         m_left_mousedown_position = event.position();
 
     auto index = index_at_event_position(event.position());
@@ -236,10 +236,10 @@ void AbstractView::mousedown_event(MouseEvent& event)
         set_cursor(index, SelectionUpdate::Ctrl);
     } else if (event.modifiers() & Mod_Shift) {
         set_cursor(index, SelectionUpdate::Shift);
-    } else if (event.button() == MouseButton::Left && m_selection.contains(index) && !m_model->drag_data_type().is_null()) {
+    } else if (event.button() == MouseButton::Primary && m_selection.contains(index) && !m_model->drag_data_type().is_null()) {
         // We might be starting a drag, so don't throw away other selected items yet.
         m_might_drag = true;
-    } else if (event.button() == MouseButton::Right) {
+    } else if (event.button() == MouseButton::Secondary) {
         set_cursor(index, SelectionUpdate::ClearIfNotSelected);
     } else {
         set_cursor(index, SelectionUpdate::Set);
@@ -285,7 +285,7 @@ void AbstractView::mousemove_event(MouseEvent& event)
     if (!m_might_drag)
         return AbstractScrollableWidget::mousemove_event(event);
 
-    if (!(event.buttons() & MouseButton::Left) || m_selection.is_empty()) {
+    if (!(event.buttons() & MouseButton::Primary) || m_selection.is_empty()) {
         m_might_drag = false;
         return AbstractScrollableWidget::mousemove_event(event);
     }
@@ -360,7 +360,7 @@ void AbstractView::doubleclick_event(MouseEvent& event)
     if (!model())
         return;
 
-    if (event.button() != MouseButton::Left)
+    if (event.button() != MouseButton::Primary)
         return;
 
     m_might_drag = false;

Userland/Libraries/LibGUI/ColorInput.cpp

@@ -59,7 +59,7 @@ void ColorInput::set_color(Color color)
 
 void ColorInput::mousedown_event(MouseEvent& event)
 {
-    if (event.button() == MouseButton::Left && color_rect().contains(event.position())) {
+    if (event.button() == MouseButton::Primary && color_rect().contains(event.position())) {
         m_may_be_color_rect_click = true;
         return;
     }
@@ -69,7 +69,7 @@ void ColorInput::mousedown_event(MouseEvent& event)
 
 void ColorInput::mouseup_event(MouseEvent& event)
 {
-    if (event.button() == MouseButton::Left) {
+    if (event.button() == MouseButton::Primary) {
         bool is_color_rect_click = m_may_be_color_rect_click && color_rect().contains(event.position());
         m_may_be_color_rect_click = false;
         if (is_color_rect_click) {

Userland/Libraries/LibGUI/ColorPicker.cpp

@@ -611,7 +611,7 @@ void ColorField::pick_color_at_position(GUI::MouseEvent& event)
 
 void ColorField::mousedown_event(GUI::MouseEvent& event)
 {
-    if (event.button() == GUI::MouseButton::Left) {
+    if (event.button() == GUI::MouseButton::Primary) {
         m_being_pressed = true;
         pick_color_at_position(event);
     }
@@ -619,7 +619,7 @@ void ColorField::mousedown_event(GUI::MouseEvent& event)
 
 void ColorField::mouseup_event(GUI::MouseEvent& event)
 {
-    if (event.button() == GUI::MouseButton::Left) {
+    if (event.button() == GUI::MouseButton::Primary) {
         m_being_pressed = false;
         pick_color_at_position(event);
     }
@@ -627,7 +627,7 @@ void ColorField::mouseup_event(GUI::MouseEvent& event)
 
 void ColorField::mousemove_event(GUI::MouseEvent& event)
 {
-    if (event.buttons() & GUI::MouseButton::Left)
+    if (event.buttons() & GUI::MouseButton::Primary)
         pick_color_at_position(event);
 }
 
@@ -705,7 +705,7 @@ void ColorSlider::pick_value_at_position(GUI::MouseEvent& event)
 
 void ColorSlider::mousedown_event(GUI::MouseEvent& event)
 {
-    if (event.button() == GUI::MouseButton::Left) {
+    if (event.button() == GUI::MouseButton::Primary) {
         m_being_pressed = true;
         pick_value_at_position(event);
     }
@@ -713,7 +713,7 @@ void ColorSlider::mousedown_event(GUI::MouseEvent& event)
 
 void ColorSlider::mouseup_event(GUI::MouseEvent& event)
 {
-    if (event.button() == GUI::MouseButton::Left) {
+    if (event.button() == GUI::MouseButton::Primary) {
         m_being_pressed = false;
         pick_value_at_position(event);
     }
@@ -721,7 +721,7 @@ void ColorSlider::mouseup_event(GUI::MouseEvent& event)
 
 void ColorSlider::mousemove_event(GUI::MouseEvent& event)
 {
-    if (event.buttons() & GUI::MouseButton::Left)
+    if (event.buttons() & GUI::MouseButton::Primary)
         pick_value_at_position(event);
 }
 

Userland/Libraries/LibGUI/ColumnsView.cpp

@@ -246,7 +246,7 @@ void ColumnsView::mousedown_event(MouseEvent& event)
     if (!model())
         return;
 
-    if (event.button() != MouseButton::Left)
+    if (event.button() != MouseButton::Primary)
         return;
 
     auto index = index_at_event_position(event.position());

Userland/Libraries/LibGUI/Event.h

@@ -311,8 +311,8 @@ public:
 
 enum MouseButton : u8 {
     None = 0,
-    Left = 1,
+    Primary = 1,
-    Right = 2,
+    Secondary = 2,
     Middle = 4,
     Back = 8,
     Forward = 16,

Userland/Libraries/LibGUI/HeaderView.cpp

@@ -142,7 +142,7 @@ void HeaderView::doubleclick_event(MouseEvent& event)
 
 void HeaderView::mousedown_event(MouseEvent& event)
 {
-    if (event.button() != GUI::MouseButton::Left)
+    if (event.button() != GUI::MouseButton::Primary)
         return;
 
     if (!model())
@@ -227,7 +227,7 @@ void HeaderView::mousemove_event(MouseEvent& event)
 
 void HeaderView::mouseup_event(MouseEvent& event)
 {
-    if (event.button() == MouseButton::Left) {
+    if (event.button() == MouseButton::Primary) {
         if (m_in_section_resize) {
             if (!section_resize_grabbable_rect(m_resizing_section).contains(event.position()))
                 set_override_cursor(Gfx::StandardCursor::None);

Userland/Libraries/LibGUI/IconView.cpp

@@ -214,7 +214,7 @@ void IconView::mousedown_event(MouseEvent& event)
     if (!model())
         return AbstractView::mousedown_event(event);
 
-    if (event.button() != MouseButton::Left)
+    if (event.button() != MouseButton::Primary)
         return AbstractView::mousedown_event(event);
 
     auto index = index_at_event_position(event.position());
@@ -239,7 +239,7 @@ void IconView::mousedown_event(MouseEvent& event)
 
 void IconView::mouseup_event(MouseEvent& event)
 {
-    if (m_rubber_banding && event.button() == MouseButton::Left) {
+    if (m_rubber_banding && event.button() == MouseButton::Primary) {
         m_rubber_banding = false;
         if (m_out_of_view_timer)
             m_out_of_view_timer->stop();

Userland/Libraries/LibGUI/LinkLabel.cpp

@@ -54,7 +54,7 @@ void LinkLabel::mousemove_event(MouseEvent& event)
 
 void LinkLabel::mousedown_event(MouseEvent& event)
 {
-    if (event.button() != MouseButton::Left)
+    if (event.button() != MouseButton::Primary)
         return;
 
     Label::mousedown_event(event);

Userland/Libraries/LibGUI/OpacitySlider.cpp

@@ -111,7 +111,7 @@ int OpacitySlider::value_at(const Gfx::IntPoint& position) const
 
 void OpacitySlider::mousedown_event(MouseEvent& event)
 {
-    if (event.button() == MouseButton::Left) {
+    if (event.button() == MouseButton::Primary) {
         m_dragging = true;
         set_value(value_at(event.position()));
         return;
@@ -130,7 +130,7 @@ void OpacitySlider::mousemove_event(MouseEvent& event)
 
 void OpacitySlider::mouseup_event(MouseEvent& event)
 {
-    if (event.button() == MouseButton::Left) {
+    if (event.button() == MouseButton::Primary) {
         m_dragging = false;
         return;
     }

Userland/Libraries/LibGUI/ResizeCorner.cpp

@@ -85,7 +85,7 @@ void ResizeCorner::paint_event(PaintEvent& event)
 
 void ResizeCorner::mousedown_event(MouseEvent& event)
 {
-    if (event.button() == MouseButton::Left)
+    if (event.button() == MouseButton::Primary)
         window()->start_interactive_resize();
     Widget::mousedown_event(event);
 }

Userland/Libraries/LibGUI/Scrollbar.cpp

@@ -220,7 +220,7 @@ void Scrollbar::on_automatic_scrolling_timer_fired()
 
 void Scrollbar::mousedown_event(MouseEvent& event)
 {
-    if (event.button() != MouseButton::Left)
+    if (event.button() != MouseButton::Primary)
         return;
     if (!has_scrubber())
         return;
@@ -259,7 +259,7 @@ void Scrollbar::mousedown_event(MouseEvent& event)
 
 void Scrollbar::mouseup_event(MouseEvent& event)
 {
-    if (event.button() != MouseButton::Left)
+    if (event.button() != MouseButton::Primary)
         return;
     set_automatic_scrolling_active(false, Component::None);
     update();

Userland/Libraries/LibGUI/Slider.cpp

@@ -80,7 +80,7 @@ Gfx::IntRect Slider::knob_rect() const
 
 void Slider::mousedown_event(MouseEvent& event)
 {
-    if (event.button() == MouseButton::Left) {
+    if (event.button() == MouseButton::Primary) {
         if (knob_rect().contains(event.position())) {
             m_dragging = true;
             m_drag_origin = event.position();
@@ -128,7 +128,7 @@ void Slider::mousemove_event(MouseEvent& event)
 
 void Slider::mouseup_event(MouseEvent& event)
 {
-    if (event.button() == MouseButton::Left) {
+    if (event.button() == MouseButton::Primary) {
         m_dragging = false;
         return;
     }

Userland/Libraries/LibGUI/Splitter.cpp

@@ -121,7 +121,7 @@ Splitter::Grabbable* Splitter::grabbable_at(Gfx::IntPoint const& position)
 
 void Splitter::mousedown_event(MouseEvent& event)
 {
-    if (event.button() != MouseButton::Left)
+    if (event.button() != MouseButton::Primary)
         return;
 
     auto* grabbable = grabbable_at(event.position());
@@ -235,7 +235,7 @@ void Splitter::did_layout()
 
 void Splitter::mouseup_event(MouseEvent& event)
 {
-    if (event.button() != MouseButton::Left)
+    if (event.button() != MouseButton::Primary)
         return;
     m_resizing = false;
     m_first_resizee = nullptr;

Userland/Libraries/LibGUI/TabWidget.cpp

@@ -416,7 +416,7 @@ void TabWidget::mousedown_event(MouseEvent& event)
         if (!button_rect.contains(event.position()))
             continue;
 
-        if (event.button() == MouseButton::Left) {
+        if (event.button() == MouseButton::Primary) {
             if (m_close_button_enabled && close_button_rect.contains(event.position())) {
                 m_pressed_close_button_index = i;
                 update_bar();
@@ -437,7 +437,7 @@ void TabWidget::mousedown_event(MouseEvent& event)
 
 void TabWidget::mouseup_event(MouseEvent& event)
 {
-    if (event.button() != MouseButton::Left)
+    if (event.button() != MouseButton::Primary)
         return;
 
     if (m_dragging_active_tab) {

Userland/Libraries/LibGUI/TextBox.cpp

@@ -103,7 +103,7 @@ void UrlBox::mousedown_event(GUI::MouseEvent& event)
     if (is_displayonly())
         return;
 
-    if (event.button() != MouseButton::Left)
+    if (event.button() != MouseButton::Primary)
         return;
 
     if (is_focus_transition()) {

Userland/Libraries/LibGUI/TextEditor.cpp

@@ -205,7 +205,7 @@ TextPosition TextEditor::text_position_at(Gfx::IntPoint const& widget_position)
 
 void TextEditor::doubleclick_event(MouseEvent& event)
 {
-    if (event.button() != MouseButton::Left)
+    if (event.button() != MouseButton::Primary)
         return;
 
     if (is_displayonly())
@@ -244,7 +244,7 @@ void TextEditor::doubleclick_event(MouseEvent& event)
 
 void TextEditor::mousedown_event(MouseEvent& event)
 {
-    if (event.button() != MouseButton::Left) {
+    if (event.button() != MouseButton::Primary) {
         return;
     }
 
@@ -287,7 +287,7 @@ void TextEditor::mousedown_event(MouseEvent& event)
 
 void TextEditor::mouseup_event(MouseEvent& event)
 {
-    if (event.button() == MouseButton::Left) {
+    if (event.button() == MouseButton::Primary) {
         if (m_in_drag_select) {
             m_in_drag_select = false;
         }

Userland/Libraries/LibGUI/Tray.cpp

@@ -122,7 +122,7 @@ void Tray::mousemove_event(GUI::MouseEvent& event)
 
 void Tray::mousedown_event(GUI::MouseEvent& event)
 {
-    if (event.button() != GUI::MouseButton::Left)
+    if (event.button() != GUI::MouseButton::Primary)
         return;
 
     auto* pressed_item = item_at(event.position());
@@ -137,7 +137,7 @@ void Tray::mousedown_event(GUI::MouseEvent& event)
 
 void Tray::mouseup_event(GUI::MouseEvent& event)
 {
-    if (event.button() != GUI::MouseButton::Left)
+    if (event.button() != GUI::MouseButton::Primary)
         return;
 
     if (auto* pressed_item = item_at(event.position()); pressed_item && m_pressed_item_index == pressed_item->index) {

Userland/Libraries/LibGUI/TreeView.cpp

@@ -79,7 +79,7 @@ void TreeView::doubleclick_event(MouseEvent& event)
     if (!index.is_valid())
         return;
 
-    if (event.button() == MouseButton::Left) {
+    if (event.button() == MouseButton::Primary) {
         set_cursor(index, SelectionUpdate::Set);
 
         if (model.row_count(index))

Userland/Libraries/LibGUI/ValueSlider.cpp

@@ -180,7 +180,7 @@ void ValueSlider::mousemove_event(MouseEvent& event)
 
 void ValueSlider::mousedown_event(MouseEvent& event)
 {
-    if (event.button() != MouseButton::Left)
+    if (event.button() != MouseButton::Primary)
         return;
 
     m_textbox->set_focus(true);
@@ -193,7 +193,7 @@ void ValueSlider::mousedown_event(MouseEvent& event)
 
 void ValueSlider::mouseup_event(MouseEvent& event)
 {
-    if (event.button() != MouseButton::Left)
+    if (event.button() != MouseButton::Primary)
         return;
 
     m_dragging = false;

Userland/Libraries/LibGUI/Widget.cpp

@@ -422,7 +422,7 @@ void Widget::handle_mousedown_event(MouseEvent& event)
     if (has_flag(focus_policy(), FocusPolicy::ClickFocus))
         set_focus(true, FocusSource::Mouse);
     mousedown_event(event);
-    if (event.button() == MouseButton::Right) {
+    if (event.button() == MouseButton::Secondary) {
         ContextMenuEvent c_event(event.position(), screen_relative_rect().location().translated(event.position()));
         dispatch_event(c_event);
     }

Userland/Libraries/LibGUI/WindowServerConnection.cpp

@@ -212,9 +212,9 @@ static MouseButton to_mouse_button(u32 button)
     case 0:
         return MouseButton::None;
     case 1:
-        return MouseButton::Left;
+        return MouseButton::Primary;
     case 2:
-        return MouseButton::Right;
+        return MouseButton::Secondary;
     case 4:
         return MouseButton::Middle;
     case 8:

Userland/Libraries/LibVT/TerminalWidget.cpp

@@ -715,7 +715,7 @@ VT::Range TerminalWidget::find_previous(const StringView& needle, const VT::Posi
 
 void TerminalWidget::doubleclick_event(GUI::MouseEvent& event)
 {
-    if (event.button() == GUI::MouseButton::Left) {
+    if (event.button() == GUI::MouseButton::Primary) {
         auto attribute = m_terminal.attribute_at(buffer_position_at(event.position()));
         if (!attribute.href_id.is_null()) {
             dbgln("Open hyperlinked URL: '{}'", attribute.href);
@@ -769,7 +769,7 @@ void TerminalWidget::copy()
 
 void TerminalWidget::mouseup_event(GUI::MouseEvent& event)
 {
-    if (event.button() == GUI::MouseButton::Left) {
+    if (event.button() == GUI::MouseButton::Primary) {
         if (!m_active_href_id.is_null()) {
             m_active_href = {};
             m_active_href_id = {};
@@ -781,7 +781,7 @@ void TerminalWidget::mouseup_event(GUI::MouseEvent& event)
 
 void TerminalWidget::mousedown_event(GUI::MouseEvent& event)
 {
-    if (event.button() == GUI::MouseButton::Left) {
+    if (event.button() == GUI::MouseButton::Primary) {
         m_left_mousedown_position = event.position();
         m_left_mousedown_position_buffer = buffer_position_at(m_left_mousedown_position);
 
@@ -836,7 +836,7 @@ void TerminalWidget::mousemove_event(GUI::MouseEvent& event)
         update();
     }
 
-    if (!(event.buttons() & GUI::MouseButton::Left))
+    if (!(event.buttons() & GUI::MouseButton::Primary))
         return;
 
     if (!m_active_href_id.is_null()) {

Userland/Libraries/LibWeb/Layout/ButtonBox.cpp

@@ -53,7 +53,7 @@ void ButtonBox::paint(PaintContext& context, PaintPhase phase)
 
 void ButtonBox::handle_mousedown(Badge<EventHandler>, const Gfx::IntPoint&, unsigned button, unsigned)
 {
-    if (button != GUI::MouseButton::Left || !dom_node().enabled())
+    if (button != GUI::MouseButton::Primary || !dom_node().enabled())
         return;
 
     m_being_pressed = true;
@@ -65,7 +65,7 @@ void ButtonBox::handle_mousedown(Badge<EventHandler>, const Gfx::IntPoint&, unsi
 
 void ButtonBox::handle_mouseup(Badge<EventHandler>, const Gfx::IntPoint& position, unsigned button, unsigned)
 {
-    if (!m_tracking_mouse || button != GUI::MouseButton::Left || !dom_node().enabled())
+    if (!m_tracking_mouse || button != GUI::MouseButton::Primary || !dom_node().enabled())
         return;
 
     // NOTE: Handling the click may run arbitrary JS, which could disappear this node.

Userland/Libraries/LibWeb/Layout/CheckBox.cpp

@@ -39,7 +39,7 @@ void CheckBox::paint(PaintContext& context, PaintPhase phase)
 
 void CheckBox::handle_mousedown(Badge<EventHandler>, const Gfx::IntPoint&, unsigned button, unsigned)
 {
-    if (button != GUI::MouseButton::Left || !dom_node().enabled())
+    if (button != GUI::MouseButton::Primary || !dom_node().enabled())
         return;
 
     m_being_pressed = true;
@@ -51,7 +51,7 @@ void CheckBox::handle_mousedown(Badge<EventHandler>, const Gfx::IntPoint&, unsig
 
 void CheckBox::handle_mouseup(Badge<EventHandler>, const Gfx::IntPoint& position, unsigned button, unsigned)
 {
-    if (!m_tracking_mouse || button != GUI::MouseButton::Left || !dom_node().enabled())
+    if (!m_tracking_mouse || button != GUI::MouseButton::Primary || !dom_node().enabled())
         return;
 
     // NOTE: Changing the checked state of the DOM node may run arbitrary JS, which could disappear this node.

Userland/Libraries/LibWeb/Layout/Label.cpp

@@ -28,7 +28,7 @@ Label::~Label()
 
 void Label::handle_mousedown_on_label(Badge<TextNode>, const Gfx::IntPoint&, unsigned button)
 {
-    if (button != GUI::MouseButton::Left)
+    if (button != GUI::MouseButton::Primary)
         return;
 
     if (auto* control = control_node(); control)
@@ -39,7 +39,7 @@ void Label::handle_mousedown_on_label(Badge<TextNode>, const Gfx::IntPoint&, uns
 
 void Label::handle_mouseup_on_label(Badge<TextNode>, const Gfx::IntPoint& position, unsigned button)
 {
-    if (!m_tracking_mouse || button != GUI::MouseButton::Left)
+    if (!m_tracking_mouse || button != GUI::MouseButton::Primary)
         return;
 
     // NOTE: Changing the checked state of the DOM node may run arbitrary JS, which could disappear this node.

Userland/Libraries/LibWeb/Layout/RadioButton.cpp

@@ -39,7 +39,7 @@ void RadioButton::paint(PaintContext& context, PaintPhase phase)
 
 void RadioButton::handle_mousedown(Badge<EventHandler>, const Gfx::IntPoint&, unsigned button, unsigned)
 {
-    if (button != GUI::MouseButton::Left || !dom_node().enabled())
+    if (button != GUI::MouseButton::Primary || !dom_node().enabled())
         return;
 
     m_being_pressed = true;
@@ -51,7 +51,7 @@ void RadioButton::handle_mousedown(Badge<EventHandler>, const Gfx::IntPoint&, un
 
 void RadioButton::handle_mouseup(Badge<EventHandler>, const Gfx::IntPoint& position, unsigned button, unsigned)
 {
-    if (!m_tracking_mouse || button != GUI::MouseButton::Left || !dom_node().enabled())
+    if (!m_tracking_mouse || button != GUI::MouseButton::Primary || !dom_node().enabled())
         return;
 
     // NOTE: Changing the checked state of the DOM node may run arbitrary JS, which could disappear this node.

Userland/Libraries/LibWeb/Page/EventHandler.cpp

@@ -168,7 +168,7 @@ bool EventHandler::handle_mouseup(const Gfx::IntPoint& position, unsigned button
         handled_event = true;
     }
 
-    if (button == GUI::MouseButton::Left)
+    if (button == GUI::MouseButton::Primary)
         m_in_mouse_selection = false;
     return handled_event;
 }
@@ -224,7 +224,7 @@ bool EventHandler::handle_mousedown(const Gfx::IntPoint& position, unsigned butt
     if (!layout_root() || layout_root() != node->document().layout_node())
         return true;
 
-    if (button == GUI::MouseButton::Right && is<HTML::HTMLImageElement>(*node)) {
+    if (button == GUI::MouseButton::Secondary && is<HTML::HTMLImageElement>(*node)) {
         auto& image_element = verify_cast<HTML::HTMLImageElement>(*node);
         auto image_url = image_element.document().parse_url(image_element.src());
         if (auto* page = m_frame.page())
@@ -236,7 +236,7 @@ bool EventHandler::handle_mousedown(const Gfx::IntPoint& position, unsigned butt
         auto href = link->href();
         auto url = document->parse_url(href);
         dbgln("Web::EventHandler: Clicking on a link to {}", url);
-        if (button == GUI::MouseButton::Left) {
+        if (button == GUI::MouseButton::Primary) {
             if (href.starts_with("javascript:")) {
                 document->run_javascript(href.substring_view(11, href.length() - 11));
             } else if (href.starts_with('#')) {
@@ -252,7 +252,7 @@ bool EventHandler::handle_mousedown(const Gfx::IntPoint& position, unsigned butt
                     m_frame.loader().load(url, FrameLoader::Type::Navigation);
                 }
             }
-        } else if (button == GUI::MouseButton::Right) {
+        } else if (button == GUI::MouseButton::Secondary) {
             if (auto* page = m_frame.page())
                 page->client().page_did_request_link_context_menu(m_frame.to_top_level_position(position), url, link->target(), modifiers);
         } else if (button == GUI::MouseButton::Middle) {
@@ -260,14 +260,14 @@ bool EventHandler::handle_mousedown(const Gfx::IntPoint& position, unsigned butt
                 page->client().page_did_middle_click_link(url, link->target(), modifiers);
         }
     } else {
-        if (button == GUI::MouseButton::Left) {
+        if (button == GUI::MouseButton::Primary) {
             auto result = layout_root()->hit_test(position, Layout::HitTestType::TextCursor);
             if (result.layout_node && result.layout_node->dom_node()) {
                 m_frame.set_cursor_position(DOM::Position(*result.layout_node->dom_node(), result.index_in_node));
                 layout_root()->set_selection({ { result.layout_node, result.index_in_node }, {} });
                 m_in_mouse_selection = true;
             }
-        } else if (button == GUI::MouseButton::Right) {
+        } else if (button == GUI::MouseButton::Secondary) {
             if (auto* page = m_frame.page())
                 page->client().page_did_request_context_menu(m_frame.to_top_level_position(position));
         }

Userland/Services/Taskbar/ClockWidget.cpp

@@ -186,7 +186,7 @@ void ClockWidget::paint_event(GUI::PaintEvent& event)
 
 void ClockWidget::mousedown_event(GUI::MouseEvent& event)
 {
-    if (event.button() != GUI::MouseButton::Left) {
+    if (event.button() != GUI::MouseButton::Primary) {
         return;
     } else {
         if (!m_calendar_window->is_visible())

Userland/Services/WindowServer/Button.cpp

@@ -45,14 +45,14 @@ void Button::on_mouse_event(const MouseEvent& event)
     auto interesting_button = false;
 
     switch (event.button()) {
-    case MouseButton::Left:
+    case MouseButton::Primary:
         interesting_button = !!on_click;
         break;
     case MouseButton::Middle:
         interesting_button = !!on_middle_click;
         break;
-    case MouseButton::Right:
+    case MouseButton::Secondary:
-        interesting_button = !!on_right_click;
+        interesting_button = !!on_secondary_click;
         break;
     default:
         break;
@@ -63,14 +63,14 @@ void Button::on_mouse_event(const MouseEvent& event)
 
     auto& wm = WindowManager::the();
 
-    if (event.type() == Event::MouseDown && (event.button() == MouseButton::Left || event.button() == MouseButton::Right || event.button() == MouseButton::Middle)) {
+    if (event.type() == Event::MouseDown && (event.button() == MouseButton::Primary || event.button() == MouseButton::Secondary || event.button() == MouseButton::Middle)) {
         m_pressed = true;
         wm.set_cursor_tracking_button(this);
         m_frame.invalidate(m_relative_rect);
         return;
     }
 
-    if (event.type() == Event::MouseUp && (event.button() == MouseButton::Left || event.button() == MouseButton::Right || event.button() == MouseButton::Middle)) {
+    if (event.type() == Event::MouseUp && (event.button() == MouseButton::Primary || event.button() == MouseButton::Secondary || event.button() == MouseButton::Middle)) {
         if (wm.cursor_tracking_button() != this)
             return;
         wm.set_cursor_tracking_button(nullptr);
@@ -78,14 +78,14 @@ void Button::on_mouse_event(const MouseEvent& event)
         m_pressed = false;
         if (rect().contains(event.position())) {
             switch (event.button()) {
-            case MouseButton::Left:
+            case MouseButton::Primary:
                 if (on_click)
                     on_click(*this);
                 break;
 
-            case MouseButton::Right:
+            case MouseButton::Secondary:
-                if (on_right_click)
+                if (on_secondary_click)
-                    on_right_click(*this);
+                    on_secondary_click(*this);
                 break;
 
             default:
@@ -113,7 +113,7 @@ void Button::on_mouse_event(const MouseEvent& event)
             m_frame.invalidate(m_relative_rect);
     }
 
-    if (event.type() == Event::MouseMove && event.buttons() & (unsigned)MouseButton::Left) {
+    if (event.type() == Event::MouseMove && event.buttons() & (unsigned)MouseButton::Primary) {
         if (wm.cursor_tracking_button() != this)
             return;
         bool old_pressed = m_pressed;

Userland/Services/WindowServer/Button.h

@@ -35,7 +35,7 @@ public:
     void on_mouse_event(const MouseEvent&);
 
     Function<void(Button&)> on_click;
-    Function<void(Button&)> on_right_click;
+    Function<void(Button&)> on_secondary_click;
     Function<void(Button&)> on_middle_click;
 
     bool is_visible() const { return m_visible; }

Userland/Services/WindowServer/ClientConnection.cpp

@@ -727,7 +727,7 @@ void ClientConnection::start_window_resize(i32 window_id)
     }
     // FIXME: We are cheating a bit here by using the current cursor location and hard-coding the left button.
     //        Maybe the client should be allowed to specify what initiated this request?
-    WindowManager::the().start_window_resize(window, ScreenInput::the().cursor_location(), MouseButton::Left);
+    WindowManager::the().start_window_resize(window, ScreenInput::the().cursor_location(), MouseButton::Primary);
 }
 
 Messages::WindowServer::StartDragResponse ClientConnection::start_drag(String const& text, HashMap<String, ByteBuffer> const& mime_data, Gfx::ShareableBitmap const& drag_bitmap)

Userland/Services/WindowServer/Event.h

@@ -50,8 +50,8 @@ public:
 
 enum class MouseButton : u8 {
     None = 0,
-    Left = 1,
+    Primary = 1,
-    Right = 2,
+    Secondary = 2,
     Middle = 4,
     Back = 8,
     Forward = 16,

Userland/Services/WindowServer/Screen.cpp

@@ -449,8 +449,8 @@ void ScreenInput::on_receive_mouse_data(const MousePacket& packet)
         auto message = make<MouseEvent>(buttons & (unsigned)button ? Event::MouseDown : Event::MouseUp, m_cursor_location, buttons, button, m_modifiers);
         Core::EventLoop::current().post_event(WindowManager::the(), move(message));
     };
-    post_mousedown_or_mouseup_if_needed(MouseButton::Left);
+    post_mousedown_or_mouseup_if_needed(MouseButton::Primary);
-    post_mousedown_or_mouseup_if_needed(MouseButton::Right);
+    post_mousedown_or_mouseup_if_needed(MouseButton::Secondary);
     post_mousedown_or_mouseup_if_needed(MouseButton::Middle);
     post_mousedown_or_mouseup_if_needed(MouseButton::Back);
     post_mousedown_or_mouseup_if_needed(MouseButton::Forward);

Userland/Services/WindowServer/WMClientConnection.cpp

@@ -100,7 +100,7 @@ void WMClientConnection::start_window_resize(i32 client_id, i32 window_id)
     auto& window = *(*it).value;
     // FIXME: We are cheating a bit here by using the current cursor location and hard-coding the left button.
     //        Maybe the client should be allowed to specify what initiated this request?
-    WindowManager::the().start_window_resize(window, ScreenInput::the().cursor_location(), MouseButton::Left);
+    WindowManager::the().start_window_resize(window, ScreenInput::the().cursor_location(), MouseButton::Primary);
 }
 
 void WMClientConnection::set_window_minimized(i32 client_id, i32 window_id, bool minimized)

Userland/Services/WindowServer/WindowFrame.cpp

@@ -700,7 +700,7 @@ bool WindowFrame::handle_titlebar_icon_mouse_event(MouseEvent const& event)
 {
     auto& wm = WindowManager::the();
 
-    if (event.type() == Event::MouseDown && (event.button() == MouseButton::Left || event.button() == MouseButton::Right)) {
+    if (event.type() == Event::MouseDown && (event.button() == MouseButton::Primary || event.button() == MouseButton::Secondary)) {
         // Manually start a potential double click. Since we're opening
         // a menu, we will only receive the MouseDown event, so we
         // need to record that fact. If the user subsequently clicks
@@ -714,7 +714,7 @@ bool WindowFrame::handle_titlebar_icon_mouse_event(MouseEvent const& event)
 
         m_window.popup_window_menu(titlebar_rect().bottom_left().translated(rect().location()), WindowMenuDefaultAction::Close);
         return true;
-    } else if (event.type() == Event::MouseUp && event.button() == MouseButton::Left) {
+    } else if (event.type() == Event::MouseUp && event.button() == MouseButton::Primary) {
         // Since the MouseDown event opened a menu, another MouseUp
         // from the second click outside the menu wouldn't be considered
         // a double click, so let's manually check if it would otherwise
@@ -743,12 +743,12 @@ void WindowFrame::handle_titlebar_mouse_event(MouseEvent const& event)
     }
 
     if (event.type() == Event::MouseDown) {
-        if ((m_window.type() == WindowType::Normal || m_window.type() == WindowType::ToolWindow) && event.button() == MouseButton::Right) {
+        if ((m_window.type() == WindowType::Normal || m_window.type() == WindowType::ToolWindow) && event.button() == MouseButton::Secondary) {
             auto default_action = m_window.is_maximized() ? WindowMenuDefaultAction::Restore : WindowMenuDefaultAction::Maximize;
             m_window.popup_window_menu(event.position().translated(rect().location()), default_action);
             return;
         }
-        if (m_window.is_movable() && event.button() == MouseButton::Left)
+        if (m_window.is_movable() && event.button() == MouseButton::Primary)
             wm.start_window_move(m_window, event.translated(rect().location()));
     }
 }
@@ -812,7 +812,7 @@ void WindowFrame::handle_border_mouse_event(const MouseEvent& event)
         return;
     }
 
-    if (event.type() == Event::MouseDown && event.button() == MouseButton::Left)
+    if (event.type() == Event::MouseDown && event.button() == MouseButton::Primary)
         wm.start_window_resize(m_window, event.translated(rect().location()));
 }
 
@@ -851,7 +851,7 @@ void WindowFrame::handle_menu_mouse_event(Menu& menu, const MouseEvent& event)
 {
     auto menubar_rect = this->menubar_rect();
     bool is_hover_with_any_menu_open = event.type() == MouseEvent::MouseMove && &m_window == WindowManager::the().window_with_active_menu();
-    bool is_mousedown_with_left_button = event.type() == MouseEvent::MouseDown && event.button() == MouseButton::Left;
+    bool is_mousedown_with_left_button = event.type() == MouseEvent::MouseDown && event.button() == MouseButton::Primary;
     bool should_open_menu = &menu != MenuManager::the().current_menu() && (is_hover_with_any_menu_open || is_mousedown_with_left_button);
     bool should_close_menu = &menu == MenuManager::the().current_menu() && is_mousedown_with_left_button;
 

Userland/Services/WindowServer/WindowManager.cpp

@@ -724,7 +724,7 @@ bool WindowManager::process_ongoing_window_move(MouseEvent& event)
 {
     if (!m_move_window)
         return false;
-    if (event.type() == Event::MouseUp && event.button() == MouseButton::Left) {
+    if (event.type() == Event::MouseUp && event.button() == MouseButton::Primary) {
 
         dbgln_if(MOVE_DEBUG, "[WM] Finish moving Window({})", m_move_window);
 
@@ -964,7 +964,7 @@ bool WindowManager::process_ongoing_drag(MouseEvent& event)
         });
     }
 
-    if (!(event.type() == Event::MouseUp && event.button() == MouseButton::Left))
+    if (!(event.type() == Event::MouseUp && event.button() == MouseButton::Primary))
         return true;
 
     if (auto* window = current_window_stack().window_at(event.position())) {
@@ -989,10 +989,10 @@ void WindowManager::set_cursor_tracking_button(Button* button)
 auto WindowManager::DoubleClickInfo::metadata_for_button(MouseButton button) const -> ClickMetadata const&
 {
     switch (button) {
-    case MouseButton::Left:
+    case MouseButton::Primary:
-        return m_left;
+        return m_primary;
-    case MouseButton::Right:
+    case MouseButton::Secondary:
-        return m_right;
+        return m_secondary;
     case MouseButton::Middle:
         return m_middle;
     case MouseButton::Back:
@@ -1007,10 +1007,10 @@ auto WindowManager::DoubleClickInfo::metadata_for_button(MouseButton button) con
 auto WindowManager::DoubleClickInfo::metadata_for_button(MouseButton button) -> ClickMetadata&
 {
     switch (button) {
-    case MouseButton::Left:
+    case MouseButton::Primary:
-        return m_left;
+        return m_primary;
-    case MouseButton::Right:
+    case MouseButton::Secondary:
-        return m_right;
+        return m_secondary;
     case MouseButton::Middle:
         return m_middle;
     case MouseButton::Back:
@@ -1163,11 +1163,11 @@ void WindowManager::process_mouse_event_for_window(HitTestResult& result, MouseE
     // First check if we should initiate a move or resize (Super+LMB or Super+RMB).
     // In those cases, the event is swallowed by the window manager.
     if (!blocking_modal_window && window.is_movable()) {
-        if (!window.is_fullscreen() && m_keyboard_modifiers == Mod_Super && event.type() == Event::MouseDown && event.button() == MouseButton::Left) {
+        if (!window.is_fullscreen() && m_keyboard_modifiers == Mod_Super && event.type() == Event::MouseDown && event.button() == MouseButton::Primary) {
             start_window_move(window, event);
             return;
         }
-        if (window.is_resizable() && m_keyboard_modifiers == Mod_Super && event.type() == Event::MouseDown && event.button() == MouseButton::Right && !window.blocking_modal_window()) {
+        if (window.is_resizable() && m_keyboard_modifiers == Mod_Super && event.type() == Event::MouseDown && event.button() == MouseButton::Secondary && !window.blocking_modal_window()) {
             start_window_resize(window, event);
             return;
         }

Userland/Services/WindowServer/WindowManager.h

@@ -388,8 +388,8 @@ private:
 
         void reset()
         {
-            m_left = {};
+            m_primary = {};
-            m_right = {};
+            m_secondary = {};
             m_middle = {};
             m_back = {};
             m_forward = {};
@@ -398,8 +398,8 @@ private:
         WeakPtr<Window> m_clicked_window;
 
     private:
-        ClickMetadata m_left;
+        ClickMetadata m_primary;
-        ClickMetadata m_right;
+        ClickMetadata m_secondary;
         ClickMetadata m_middle;
         ClickMetadata m_back;
         ClickMetadata m_forward;

Userland/Utilities/shot.cpp

@@ -41,7 +41,7 @@ public:
 private:
     virtual void mousedown_event(GUI::MouseEvent& event) override
     {
-        if (event.button() == GUI::MouseButton::Left)
+        if (event.button() == GUI::MouseButton::Primary)
             m_anchor_point = event.position();
     };
 
@@ -55,7 +55,7 @@ private:
 
     virtual void mouseup_event(GUI::MouseEvent& event) override
     {
-        if (event.button() == GUI::MouseButton::Left)
+        if (event.button() == GUI::MouseButton::Primary)
             m_window->close();
     };