keybinds: Add dispatcher for xmonad/qtile-style workspace switching (#4439)

* feat: implement xmonad/qtile-style workspace switching

Implements the focusWorkspaceOnCurrentMonitor dispatcher and function,
which implements XMonad/Qtile-style workspace switching.

When called, focusWorkspaceOnCurrentMonitor will:
1. Send the requested workspace to the current monitor,
2. If the workspace was previously active on a different monitor,
   replace it with the workspace that was previously active on the
   current monitor,
3. Focus the workspace on the current monitor.

* fix: address PR comments

src/Compositor.cpp

@@ -2114,7 +2114,7 @@ CMonitor* CCompositor::getMonitorFromString(const std::string& name) {
     return nullptr;
 }
 
-void CCompositor::moveWorkspaceToMonitor(CWorkspace* pWorkspace, CMonitor* pMonitor) {
+void CCompositor::moveWorkspaceToMonitor(CWorkspace* pWorkspace, CMonitor* pMonitor, bool noWarpCursor) {
 
     // We trust the workspace and monitor to be correct.
 
@@ -2200,6 +2200,7 @@ void CCompositor::moveWorkspaceToMonitor(CWorkspace* pWorkspace, CMonitor* pMoni
 
         pWorkspace->startAnim(true, true, true);
 
+        if (!noWarpCursor)
             wlr_cursor_warp(m_sWLRCursor, nullptr, pMonitor->vecPosition.x + pMonitor->vecTransformedSize.x / 2, pMonitor->vecPosition.y + pMonitor->vecTransformedSize.y / 2);
 
         g_pInputManager->sendMotionEventsToFocused();

src/Compositor.hpp

@@ -176,7 +176,7 @@ class CCompositor {
     void           updateWorkspaceWindows(const int64_t& id);
     void           updateWindowAnimatedDecorationValues(CWindow*);
     int            getNextAvailableMonitorID(std::string const& name);
-    void           moveWorkspaceToMonitor(CWorkspace*, CMonitor*);
+    void           moveWorkspaceToMonitor(CWorkspace*, CMonitor*, bool noWarpCursor = false);
     void           swapActiveWorkspaces(CMonitor*, CMonitor*);
     CMonitor*      getMonitorFromString(const std::string&);
     bool           workspaceIDOutOfBounds(const int64_t&);

src/helpers/Monitor.cpp

@@ -502,7 +502,7 @@ float CMonitor::getDefaultScale() {
     return 1;
 }
 
-void CMonitor::changeWorkspace(CWorkspace* const pWorkspace, bool internal, bool noMouseMove) {
+void CMonitor::changeWorkspace(CWorkspace* const pWorkspace, bool internal, bool noMouseMove, bool noFocus) {
     if (!pWorkspace)
         return;
 
@@ -533,7 +533,7 @@ void CMonitor::changeWorkspace(CWorkspace* const pWorkspace, bool internal, bool
             }
         }
 
-        if (!g_pCompositor->m_pLastMonitor->specialWorkspaceID) {
+        if (!noFocus && !g_pCompositor->m_pLastMonitor->specialWorkspaceID) {
             static auto* const PFOLLOWMOUSE = &g_pConfigManager->getConfigValuePtr("input:follow_mouse")->intValue;
             CWindow*           pWindow      = pWorkspace->getLastFocusedWindow();
 

src/helpers/Monitor.hpp

@@ -120,7 +120,7 @@ class CMonitor {
     void     setMirror(const std::string&);
     bool     isMirror();
     float    getDefaultScale();
-    void     changeWorkspace(CWorkspace* const pWorkspace, bool internal = false, bool noMouseMove = false);
+    void     changeWorkspace(CWorkspace* const pWorkspace, bool internal = false, bool noMouseMove = false, bool noFocus = false);
     void     changeWorkspace(const int& id, bool internal = false);
     void     setSpecialWorkspace(CWorkspace* const pWorkspace);
     void     setSpecialWorkspace(const int& id);

src/managers/KeybindManager.cpp

@@ -46,6 +46,7 @@ CKeybindManager::CKeybindManager() {
     m_mDispatchers["workspaceopt"]                   = workspaceOpt;
     m_mDispatchers["exit"]                           = exitHyprland;
     m_mDispatchers["movecurrentworkspacetomonitor"]  = moveCurrentWorkspaceToMonitor;
+    m_mDispatchers["focusworkspaceoncurrentmonitor"] = focusWorkspaceOnCurrentMonitor;
     m_mDispatchers["moveworkspacetomonitor"]         = moveWorkspaceToMonitor;
     m_mDispatchers["togglespecialworkspace"]         = toggleSpecialWorkspace;
     m_mDispatchers["forcerendererreload"]            = forceRendererReload;
@@ -1504,6 +1505,48 @@ void CKeybindManager::moveWorkspaceToMonitor(std::string args) {
     g_pCompositor->moveWorkspaceToMonitor(PWORKSPACE, PMONITOR);
 }
 
+void CKeybindManager::focusWorkspaceOnCurrentMonitor(std::string args) {
+    std::string workspaceName;
+    const int   WORKSPACEID = getWorkspaceIDFromString(args, workspaceName);
+
+    if (WORKSPACEID == WORKSPACE_INVALID) {
+        Debug::log(ERR, "focusWorkspaceOnCurrentMonitor invalid workspace!");
+        return;
+    }
+
+    const auto PCURRMONITOR = g_pCompositor->getMonitorFromCursor();
+
+    if (!PCURRMONITOR) {
+        Debug::log(ERR, "focusWorkspaceOnCurrentMonitor monitor doesn't exist!");
+        return;
+    }
+
+    auto PWORKSPACE = g_pCompositor->getWorkspaceByID(WORKSPACEID);
+
+    if (!PWORKSPACE) {
+        PWORKSPACE = g_pCompositor->createNewWorkspace(WORKSPACEID, PCURRMONITOR->ID);
+        // we can skip the moving, since it's already on the current monitor
+        changeworkspace(PWORKSPACE->getConfigName());
+        return;
+    }
+
+    if (PWORKSPACE->m_iMonitorID != PCURRMONITOR->ID) {
+        const auto POLDMONITOR = g_pCompositor->getMonitorFromID(PWORKSPACE->m_iMonitorID);
+        if (!POLDMONITOR) { // wat
+            Debug::log(ERR, "focusWorkspaceOnCurrentMonitor old monitor doesn't exist!");
+            return;
+        }
+        if (POLDMONITOR->activeWorkspace == WORKSPACEID) {
+            g_pCompositor->swapActiveWorkspaces(POLDMONITOR, PCURRMONITOR);
+            return;
+        } else {
+            g_pCompositor->moveWorkspaceToMonitor(PWORKSPACE, PCURRMONITOR, true);
+        }
+    }
+
+    changeworkspace(PWORKSPACE->getConfigName());
+}
+
 void CKeybindManager::toggleSpecialWorkspace(std::string args) {
 
     static auto* const PFOLLOWMOUSE = &g_pConfigManager->getConfigValuePtr("input:follow_mouse")->intValue;

src/managers/KeybindManager.hpp

@@ -134,6 +134,7 @@ class CKeybindManager {
     static void     exitHyprland(std::string);
     static void     moveCurrentWorkspaceToMonitor(std::string);
     static void     moveWorkspaceToMonitor(std::string);
+    static void     focusWorkspaceOnCurrentMonitor(std::string);
     static void     toggleSpecialWorkspace(std::string);
     static void     forceRendererReload(std::string);
     static void     resizeActive(std::string);