Add input:touchdevice:td_rotation config

Add support for touch device roation. The rotation is
set globally with `input:touchdevice:td_rotation config` and by
device with `td_rotation` in a device block.

src/config/ConfigManager.cpp

@@ -147,6 +147,7 @@ void CConfigManager::setDefaultVars() {
     configValues["input:touchpad:tap-to-click"].intValue = 1;
     configValues["input:touchpad:drag_lock"].intValue = 0;
     configValues["input:touchpad:scroll_factor"].floatValue = 1.f;
+    configValues["input:touchdevice:td_rotation"].intValue = 0;
 
     configValues["binds:pass_mouse_when_bound"].intValue = 0;
     configValues["binds:scroll_event_delay"].intValue = 300;
@@ -187,6 +188,7 @@ void CConfigManager::setDeviceDefaultVars(const std::string& dev) {
     cfgValues["drag_lock"].intValue = 0;
     cfgValues["left_handed"].intValue = 0;
     cfgValues["scroll_method"].strValue = STRVAL_EMPTY;
+    cfgValues["td_rotation"].intValue = 0;
 }
 
 void CConfigManager::setDefaultAnimationVars() {
@@ -1139,6 +1141,7 @@ void CConfigManager::loadConfigLoadVars() {
     if (!isFirstLaunch) {
         g_pInputManager->setKeyboardLayout();
         g_pInputManager->setPointerConfigs();
+        g_pInputManager->setTouchDeviceConfigs();
     }
 
     // Calculate the internal vars
@@ -1424,6 +1427,7 @@ void CConfigManager::dispatchExecOnce() {
     // set input, fixes some certain issues
     g_pInputManager->setKeyboardLayout();
     g_pInputManager->setPointerConfigs();
+    g_pInputManager->setTouchDeviceConfigs();
 
     // set ws names again
     for (auto& ws : g_pCompositor->m_vWorkspaces) {

src/debug/HyprCtl.cpp

@@ -562,6 +562,7 @@ std::string dispatchKeyword(std::string in) {
     if (COMMAND.contains("input") || COMMAND.contains("device:")) {
         g_pInputManager->setKeyboardLayout(); // update kb layout
         g_pInputManager->setPointerConfigs(); // update mouse cfgs
+        g_pInputManager->setTouchDeviceConfigs(); // update touch device cfgs
     }
 
     if (COMMAND.contains("general:layout"))

src/helpers/WLClasses.hpp

@@ -326,6 +326,8 @@ struct SIMEPopup {
 struct STouchDevice {
     wlr_input_device* pWlrDevice = nullptr;
 
+    std::string name = "";
+
     DYNLISTENER(destroy);
 
     bool operator==(const STouchDevice& other) {

src/managers/input/InputManager.cpp

@@ -1027,6 +1027,13 @@ void CInputManager::newTouchDevice(wlr_input_device* pDevice) {
     const auto PNEWDEV = &m_lTouchDevices.emplace_back();
     PNEWDEV->pWlrDevice = pDevice;
 
+    try {
+        PNEWDEV->name = std::string(pDevice->name);
+    } catch(std::exception& e) {
+        Debug::log(ERR, "Touch Device had no name???"); // logic error
+    }
+
+    setTouchDeviceConfigs();
     wlr_cursor_attach_input_device(g_pCompositor->m_sWLRCursor, pDevice);
 
     Debug::log(LOG, "New touch device added at %x", PNEWDEV);
@@ -1036,6 +1043,50 @@ void CInputManager::newTouchDevice(wlr_input_device* pDevice) {
     }, PNEWDEV, "TouchDevice");
 }
 
+void CInputManager::setTouchDeviceConfigs() {
+    // The rotation matrices.
+    // The third row is always 0 0 1 and is not expected by `libinput_device_config_calibration_set_matrix`
+    const float MATRICES[4][6] = {
+       {
+        1, 0, 0,
+        0, 1, 0
+       },
+       {
+        0, -1, 1,
+        1, 0, 0
+       },
+       {
+        -1, 0, 1,
+        0, -1, 1
+       },
+       {
+        0, 1, 0,
+        -1, 0, 1
+       }
+    };
+    const int NB_MATRICES = 4;
+    for (auto& m : m_lTouchDevices) {
+        const auto PTOUCHDEV = &m;
+
+        auto devname = PTOUCHDEV->name;
+        transform(devname.begin(), devname.end(), devname.begin(), ::tolower);
+
+        const auto HASCONFIG = g_pConfigManager->deviceConfigExists(devname);
+
+        if (HASCONFIG)
+            Debug::log(LOG, "Touch Screen %s has config", devname.c_str());
+        else
+            Debug::log(LOG, "Touch Screen %s has no config", devname.c_str());
+
+        if (wlr_input_device_is_libinput(m.pWlrDevice)) {
+            const auto LIBINPUTDEV = (libinput_device*)wlr_libinput_get_device_handle(m.pWlrDevice);
+
+            const int ROTATION = ((HASCONFIG ? g_pConfigManager->getDeviceInt(devname, "td_rotation") : g_pConfigManager->getInt("input:touchdevice:td_rotation")) % NB_MATRICES + NB_MATRICES) % NB_MATRICES;
+            libinput_device_config_calibration_set_matrix(LIBINPUTDEV, MATRICES[ROTATION]);
+        }
+    }
+}
+
 void CInputManager::destroyTouchDevice(STouchDevice* pDevice) {
     Debug::log(LOG, "Touch device at %x removed", pDevice);
 

src/managers/input/InputManager.hpp

@@ -53,6 +53,7 @@ public:
 
     void            setKeyboardLayout();
     void            setPointerConfigs();
+    void            setTouchDeviceConfigs();
 
     void            updateDragIcon();
     void            updateCapabilities(wlr_input_device*);