input: add relative_input for tablets

closes #2639

2 files changed, 14 insertions, 4 deletions

diff --git a/src/managers/input/InputManager.cpp b/src/managers/input/InputManager.cpp
index 9ef1b4a3..21c9435d 100644
--- a/src/managers/input/InputManager.cpp
+++ b/src/managers/input/InputManager.cpp
@@ -1494,7 +1494,10 @@ void CInputManager::setTabletConfigs() {
         if (wlr_input_device_is_libinput(t.wlrDevice)) {
             const auto LIBINPUTDEV = (libinput_device*)wlr_libinput_get_device_handle(t.wlrDevice);
 
-            const int  ROTATION = std::clamp(g_pConfigManager->getDeviceInt(t.name, "transform", "input:tablet:transform"), 0, 7);
+            const auto RELINPUT = g_pConfigManager->getDeviceInt(t.name, "relative_input", "input:tablet:relative_input");
+            t.relativeInput     = RELINPUT;
+
+            const int ROTATION = std::clamp(g_pConfigManager->getDeviceInt(t.name, "transform", "input:tablet:transform"), 0, 7);
             Debug::log(LOG, "Setting calibration matrix for device {}", t.name);
             libinput_device_config_calibration_set_matrix(LIBINPUTDEV, MATRICES[ROTATION]);
 
diff --git a/src/managers/input/Tablets.cpp b/src/managers/input/Tablets.cpp
index e5968a5a..2c1681c1 100644
--- a/src/managers/input/Tablets.cpp
+++ b/src/managers/input/Tablets.cpp
@@ -43,9 +43,16 @@ void CInputManager::newTabletTool(wlr_input_device* pDevice) {
                     g_pInputManager->m_tmrLastCursorMovement.reset();
                     break;
                 default:
-                    double x = (EVENT->updated_axes & WLR_TABLET_TOOL_AXIS_X) ? EVENT->x : NAN;
-                    double y = (EVENT->updated_axes & WLR_TABLET_TOOL_AXIS_Y) ? EVENT->y : NAN;
-                    wlr_cursor_warp_absolute(g_pCompositor->m_sWLRCursor, PTAB->wlrDevice, x, y);
+                    double x  = (EVENT->updated_axes & WLR_TABLET_TOOL_AXIS_X) ? EVENT->x : NAN;
+                    double dx = (EVENT->updated_axes & WLR_TABLET_TOOL_AXIS_X) ? EVENT->dx : NAN;
+                    double y  = (EVENT->updated_axes & WLR_TABLET_TOOL_AXIS_Y) ? EVENT->y : NAN;
+                    double dy = (EVENT->updated_axes & WLR_TABLET_TOOL_AXIS_Y) ? EVENT->dy : NAN;
+
+                    if (PTAB->relativeInput)
+                        wlr_cursor_move(g_pCompositor->m_sWLRCursor, PTAB->wlrDevice, dx, dy);
+                    else
+                        wlr_cursor_warp_absolute(g_pCompositor->m_sWLRCursor, PTAB->wlrDevice, x, y);
+
                     g_pInputManager->refocus();
                     g_pInputManager->m_tmrLastCursorMovement.reset();
                     break;