input: Add options to set tablet's active area (#5199)

* Add options to set tablet's active area

* Set tablet's active area in `setTabletConfigs`

* Fix formatting for new variables in ConfigManager

* Report tablet's physical size with hyprctl

2 files changed, 14 insertions, 1 deletions

diff --git a/src/managers/input/InputManager.cpp b/src/managers/input/InputManager.cpp
index 7d820c8f..94e6abec 100644
--- a/src/managers/input/InputManager.cpp
+++ b/src/managers/input/InputManager.cpp
@@ -1438,6 +1438,13 @@ void CInputManager::setTabletConfigs() {
             auto       regionBox   = CBox{REGION_POS.x, REGION_POS.y, REGION_SIZE.x, REGION_SIZE.y};
             if (!regionBox.empty())
                 wlr_cursor_map_input_to_region(g_pCompositor->m_sWLRCursor, t.wlrDevice, regionBox.pWlr());
+
+            const auto ACTIVE_AREA_SIZE = g_pConfigManager->getDeviceVec(t.name, "active_area_size", "input:tablet:active_area_size");
+            const auto ACTIVE_AREA_POS  = g_pConfigManager->getDeviceVec(t.name, "active_area_position", "input:tablet:active_area_position");
+            if (ACTIVE_AREA_SIZE.x != 0 || ACTIVE_AREA_SIZE.y != 0) {
+                t.activeArea = CBox{ACTIVE_AREA_POS.x / t.wlrTablet->width_mm, ACTIVE_AREA_POS.y / t.wlrTablet->height_mm,
+                                    (ACTIVE_AREA_POS.x + ACTIVE_AREA_SIZE.x) / t.wlrTablet->width_mm, (ACTIVE_AREA_POS.y + ACTIVE_AREA_SIZE.y) / t.wlrTablet->height_mm};
+            }
         }
     }
 }
diff --git a/src/managers/input/Tablets.cpp b/src/managers/input/Tablets.cpp
index 387212c7..9252fca4 100644
--- a/src/managers/input/Tablets.cpp
+++ b/src/managers/input/Tablets.cpp
@@ -51,8 +51,14 @@ void CInputManager::newTabletTool(wlr_input_device* pDevice) {
 
                     if (PTAB->relativeInput)
                         wlr_cursor_move(g_pCompositor->m_sWLRCursor, PTAB->wlrDevice, dx, dy);
-                    else
+                    else {
+                        // Calculate transformations if active area is set
+                        if (!PTAB->activeArea.empty()) {
+                            x = (x - PTAB->activeArea.x) / (PTAB->activeArea.w - PTAB->activeArea.x);
+                            y = (y - PTAB->activeArea.y) / (PTAB->activeArea.h - PTAB->activeArea.y);
+                        }
                         wlr_cursor_warp_absolute(g_pCompositor->m_sWLRCursor, PTAB->wlrDevice, x, y);
+                    }
 
                     g_pInputManager->simulateMouseMovement();
                     g_pInputManager->focusTablet(PTAB, EVENT->tool, true);