gestures: add cursor zoom (#13033)

3 files changed, 62 insertions, 1 deletions

diff --git a/src/config/ConfigManager.cpp b/src/config/ConfigManager.cpp
index 1eb9896a..98e8c0e8 100644
--- a/src/config/ConfigManager.cpp
+++ b/src/config/ConfigManager.cpp
@@ -39,6 +39,7 @@
 #include "../managers/input/trackpad/gestures/CloseGesture.hpp"
 #include "../managers/input/trackpad/gestures/FloatGesture.hpp"
 #include "../managers/input/trackpad/gestures/FullscreenGesture.hpp"
+#include "../managers/input/trackpad/gestures/CursorZoomGesture.hpp"
 
 #include "../managers/HookSystemManager.hpp"
 #include "../protocols/types/ContentType.hpp"
@@ -2917,7 +2918,10 @@ std::optional<std::string> CConfigManager::handleGesture(const std::string& comm
     else if (data[startDataIdx] == "fullscreen")
         result = g_pTrackpadGestures->addGesture(makeUnique<CFullscreenTrackpadGesture>(std::string{data[startDataIdx + 1]}), fingerCount, direction, modMask, deltaScale,
                                                  disableInhibit);
-    else if (data[startDataIdx] == "unset")
+    else if (data[startDataIdx] == "cursorZoom") {
+        result = g_pTrackpadGestures->addGesture(makeUnique<CCursorZoomTrackpadGesture>(std::string{data[startDataIdx + 1]}, std::string{data[startDataIdx + 2]}), fingerCount,
+                                                 direction, modMask, deltaScale, disableInhibit);
+    } else if (data[startDataIdx] == "unset")
         result = g_pTrackpadGestures->removeGesture(fingerCount, direction, modMask, deltaScale, disableInhibit);
     else
         return std::format("Invalid gesture: {}", data[startDataIdx]);
diff --git a/src/managers/input/trackpad/gestures/CursorZoomGesture.cpp b/src/managers/input/trackpad/gestures/CursorZoomGesture.cpp
new file mode 100644
index 00000000..97dfe158
--- /dev/null
+++ b/src/managers/input/trackpad/gestures/CursorZoomGesture.cpp
@@ -0,0 +1,33 @@
+#include "CursorZoomGesture.hpp"
+
+#include "../../../../Compositor.hpp"
+#include "../../../../helpers/Monitor.hpp"
+
+CCursorZoomTrackpadGesture::CCursorZoomTrackpadGesture(const std::string& first, const std::string& second) {
+    try {
+        m_zoomValue = std::stof(first);
+    } catch (...) { ; }
+
+    if (second == "mult")
+        m_mode = MODE_MULT;
+}
+
+void CCursorZoomTrackpadGesture::begin(const ITrackpadGesture::STrackpadGestureBegin& e) {
+    ITrackpadGesture::begin(e);
+
+    if (m_mode == MODE_TOGGLE)
+        m_zoomed = !m_zoomed;
+
+    for (auto const& m : g_pCompositor->m_monitors) {
+        switch (m_mode) {
+            case MODE_TOGGLE:
+                static auto PZOOMFACTOR = CConfigValue<Hyprlang::FLOAT>("cursor:zoom_factor");
+                *m->m_cursorZoom        = m_zoomed ? m_zoomValue : *PZOOMFACTOR;
+                break;
+            case MODE_MULT: *m->m_cursorZoom = std::clamp(m->m_cursorZoom->goal() * m_zoomValue, 1.0F, 100.0F); break;
+        }
+    }
+}
+
+void CCursorZoomTrackpadGesture::update(const ITrackpadGesture::STrackpadGestureUpdate& e) {}
+void CCursorZoomTrackpadGesture::end(const ITrackpadGesture::STrackpadGestureEnd& e) {}
diff --git a/src/managers/input/trackpad/gestures/CursorZoomGesture.hpp b/src/managers/input/trackpad/gestures/CursorZoomGesture.hpp
new file mode 100644
index 00000000..b53c81e9
--- /dev/null
+++ b/src/managers/input/trackpad/gestures/CursorZoomGesture.hpp
@@ -0,0 +1,24 @@
+#pragma once
+
+#include "ITrackpadGesture.hpp"
+
+class CCursorZoomTrackpadGesture : public ITrackpadGesture {
+  public:
+    CCursorZoomTrackpadGesture(const std::string& zoomLevel, const std::string& mode);
+    virtual ~CCursorZoomTrackpadGesture() = default;
+
+    virtual void begin(const ITrackpadGesture::STrackpadGestureBegin& e);
+    virtual void update(const ITrackpadGesture::STrackpadGestureUpdate& e);
+    virtual void end(const ITrackpadGesture::STrackpadGestureEnd& e);
+
+  private:
+    float              m_zoomValue = 1.0;
+    inline static bool m_zoomed    = false;
+
+    enum eMode : uint8_t {
+        MODE_TOGGLE = 0,
+        MODE_MULT,
+    };
+
+    eMode m_mode = MODE_TOGGLE;
+};