Resize on border (#1347)

11 files changed, 228 insertions, 51 deletions

diff --git a/src/Compositor.cpp b/src/Compositor.cpp
index db86cd3e..365a2c12 100644
--- a/src/Compositor.cpp
+++ b/src/Compositor.cpp
@@ -571,22 +571,18 @@ CWindow* CCompositor::vectorToWindowTiled(const Vector2D& pos) {
     return nullptr;
 }
 
-void findExtensionForVector2D(wlr_surface* surface, int x, int y, void* data) {
-    const auto DATA = (SExtensionFindingData*)data;
-
-    wlr_box    box = {DATA->origin.x + x, DATA->origin.y + y, surface->current.width, surface->current.height};
-
-    if (wlr_box_contains_point(&box, DATA->vec.x, DATA->vec.y))
-        *DATA->found = surface;
-}
-
 CWindow* CCompositor::vectorToWindowIdeal(const Vector2D& pos) {
-    const auto PMONITOR = getMonitorFromVector(pos);
+    const auto         PMONITOR          = getMonitorFromVector(pos);
+    static auto* const PRESIZEONBORDER   = &g_pConfigManager->getConfigValuePtr("general:resize_on_border")->intValue;
+    static auto* const PBORDERSIZE       = &g_pConfigManager->getConfigValuePtr("general:border_size")->intValue;
+    static auto* const PBORDERGRABEXTEND = &g_pConfigManager->getConfigValuePtr("general:extend_border_grab_area")->intValue;
+    const auto         BORDER_GRAB_AREA  = *PRESIZEONBORDER ? *PBORDERSIZE + *PBORDERGRABEXTEND : 0;
 
     // special workspace
     if (PMONITOR->specialWorkspaceID) {
         for (auto w = m_vWindows.rbegin(); w != m_vWindows.rend(); w++) {
-            wlr_box box = {(*w)->m_vRealPosition.vec().x, (*w)->m_vRealPosition.vec().y, (*w)->m_vRealSize.vec().x, (*w)->m_vRealSize.vec().y};
+            wlr_box box = {(*w)->m_vRealPosition.vec().x - BORDER_GRAB_AREA, (*w)->m_vRealPosition.vec().y - BORDER_GRAB_AREA, (*w)->m_vRealSize.vec().x + 2 * BORDER_GRAB_AREA,
+                           (*w)->m_vRealSize.vec().y + 2 * BORDER_GRAB_AREA};
             if ((*w)->m_bIsFloating && (*w)->m_iWorkspaceID == PMONITOR->specialWorkspaceID && (*w)->m_bIsMapped && wlr_box_contains_point(&box, pos.x, pos.y) &&
                 !(*w)->isHidden() && !(*w)->m_bX11ShouldntFocus)
                 return (*w).get();
@@ -602,18 +598,14 @@ CWindow* CCompositor::vectorToWindowIdeal(const Vector2D& pos) {
 
     // pinned windows on top of floating regardless
     for (auto w = m_vWindows.rbegin(); w != m_vWindows.rend(); w++) {
-        wlr_box box = {(*w)->m_vRealPosition.vec().x, (*w)->m_vRealPosition.vec().y, (*w)->m_vRealSize.vec().x, (*w)->m_vRealSize.vec().y};
+        wlr_box box = {(*w)->m_vRealPosition.vec().x - BORDER_GRAB_AREA, (*w)->m_vRealPosition.vec().y - BORDER_GRAB_AREA, (*w)->m_vRealSize.vec().x + 2 * BORDER_GRAB_AREA,
+                       (*w)->m_vRealSize.vec().y + 2 * BORDER_GRAB_AREA};
         if ((*w)->m_bIsFloating && (*w)->m_bIsMapped && !(*w)->isHidden() && !(*w)->m_bX11ShouldntFocus && (*w)->m_bPinned) {
             if (wlr_box_contains_point(&box, m_sWLRCursor->x, m_sWLRCursor->y))
                 return w->get();
 
             if (!(*w)->m_bIsX11) {
-                wlr_surface*          resultSurf = nullptr;
-                Vector2D              origin     = (*w)->m_vRealPosition.vec();
-                SExtensionFindingData data       = {origin, pos, &resultSurf};
-                wlr_xdg_surface_for_each_popup_surface((*w)->m_uSurface.xdg, findExtensionForVector2D, &data);
-
-                if (resultSurf)
+                if ((*w)->hasPopupAt(pos))
                     return w->get();
             }
         }
@@ -621,7 +613,8 @@ CWindow* CCompositor::vectorToWindowIdeal(const Vector2D& pos) {
 
     // first loop over floating cuz they're above, m_lWindows should be sorted bottom->top, for tiled it doesn't matter.
     for (auto w = m_vWindows.rbegin(); w != m_vWindows.rend(); w++) {
-        wlr_box box = {(*w)->m_vRealPosition.vec().x, (*w)->m_vRealPosition.vec().y, (*w)->m_vRealSize.vec().x, (*w)->m_vRealSize.vec().y};
+        wlr_box box = {(*w)->m_vRealPosition.vec().x - BORDER_GRAB_AREA, (*w)->m_vRealPosition.vec().y - BORDER_GRAB_AREA, (*w)->m_vRealSize.vec().x + 2 * BORDER_GRAB_AREA,
+                       (*w)->m_vRealSize.vec().y + 2 * BORDER_GRAB_AREA};
         if ((*w)->m_bIsFloating && (*w)->m_bIsMapped && isWorkspaceVisible((*w)->m_iWorkspaceID) && !(*w)->isHidden() && !(*w)->m_bPinned) {
             // OR windows should add focus to parent
             if ((*w)->m_bX11ShouldntFocus && (*w)->m_iX11Type != 2)
@@ -639,12 +632,7 @@ CWindow* CCompositor::vectorToWindowIdeal(const Vector2D& pos) {
             }
 
             if (!(*w)->m_bIsX11) {
-                wlr_surface*          resultSurf = nullptr;
-                Vector2D              origin     = (*w)->m_vRealPosition.vec();
-                SExtensionFindingData data       = {origin, pos, &resultSurf};
-                wlr_xdg_surface_for_each_popup_surface((*w)->m_uSurface.xdg, findExtensionForVector2D, &data);
-
-                if (resultSurf)
+                if ((*w)->hasPopupAt(pos))
                     return w->get();
             }
         }
@@ -653,12 +641,7 @@ CWindow* CCompositor::vectorToWindowIdeal(const Vector2D& pos) {
     // for windows, we need to check their extensions too, first.
     for (auto& w : m_vWindows) {
         if (!w->m_bIsX11 && !w->m_bIsFloating && w->m_bIsMapped && w->m_iWorkspaceID == PMONITOR->activeWorkspace && !w->isHidden() && !w->m_bX11ShouldntFocus) {
-            wlr_surface*          resultSurf = nullptr;
-            Vector2D              origin     = w->m_vRealPosition.vec();
-            SExtensionFindingData data       = {origin, pos, &resultSurf};
-            wlr_xdg_surface_for_each_popup_surface(w->m_uSurface.xdg, findExtensionForVector2D, &data);
-
-            if (resultSurf)
+            if ((w)->hasPopupAt(pos))
                 return w.get();
         }
     }
diff --git a/src/Window.cpp b/src/Window.cpp
index de44f28d..dd0f660c 100644
--- a/src/Window.cpp
+++ b/src/Window.cpp
@@ -413,3 +413,57 @@ void CWindow::updateDynamicRules() {
         applyDynamicRule(r);
     }
 }
+
+// check if the point is "hidden" under a rounded corner of the window
+// it is assumed that the point is within the real window box (m_vRealPosition, m_vRealSize)
+// otherwise behaviour is undefined
+bool CWindow::isInCurvedCorner(double x, double y) {
+    static auto* const ROUNDING   = &g_pConfigManager->getConfigValuePtr("decoration:rounding")->intValue;
+    static auto* const BORDERSIZE = &g_pConfigManager->getConfigValuePtr("general:border_size")->intValue;
+
+    if (BORDERSIZE >= ROUNDING || ROUNDING == 0)
+        return false;
+
+    // (x0, y0), (x0, y1), ... are the center point of rounding at each corner
+    double x0 = m_vRealPosition.vec().x + *ROUNDING;
+    double y0 = m_vRealPosition.vec().y + *ROUNDING;
+    double x1 = m_vRealPosition.vec().x + m_vRealSize.vec().x - *ROUNDING;
+    double y1 = m_vRealPosition.vec().y + m_vRealSize.vec().y - *ROUNDING;
+
+    if (x < x0 && y < y0) {
+        return Vector2D{x0, y0}.distance(Vector2D{x, y}) > (double)*ROUNDING;
+    }
+    if (x > x1 && y < y0) {
+        return Vector2D{x1, y0}.distance(Vector2D{x, y}) > (double)*ROUNDING;
+    }
+    if (x < x0 && y > y1) {
+        return Vector2D{x0, y1}.distance(Vector2D{x, y}) > (double)*ROUNDING;
+    }
+    if (x > x1 && y > y1) {
+        return Vector2D{x1, y1}.distance(Vector2D{x, y}) > (double)*ROUNDING;
+    }
+
+    return false;
+}
+
+void findExtensionForVector2D(wlr_surface* surface, int x, int y, void* data) {
+    const auto DATA = (SExtensionFindingData*)data;
+
+    wlr_box    box = {DATA->origin.x + x, DATA->origin.y + y, surface->current.width, surface->current.height};
+
+    if (wlr_box_contains_point(&box, DATA->vec.x, DATA->vec.y))
+        *DATA->found = surface;
+}
+
+// checks if the wayland window has a popup at pos
+bool CWindow::hasPopupAt(const Vector2D& pos) {
+    if (m_bIsX11)
+        return false;
+
+    wlr_surface*          resultSurf = nullptr;
+    Vector2D              origin     = m_vRealPosition.vec();
+    SExtensionFindingData data       = {origin, pos, &resultSurf};
+    wlr_xdg_surface_for_each_popup_surface(m_uSurface.xdg, findExtensionForVector2D, &data);
+
+    return resultSurf;
+}
diff --git a/src/Window.hpp b/src/Window.hpp
index 04be3a27..658bdceb 100644
--- a/src/Window.hpp
+++ b/src/Window.hpp
@@ -7,6 +7,7 @@
 #include "render/decorations/IHyprWindowDecoration.hpp"
 #include <deque>
 #include "config/ConfigDataValues.hpp"
+#include "helpers/Vector2D.hpp"
 
 enum eIdleInhibitMode
 {
@@ -297,7 +298,10 @@ class CWindow {
     bool                   isHidden();
     void                   applyDynamicRule(const SWindowRule& r);
     void                   updateDynamicRules();
+
     void                   onBorderAngleAnimEnd(void* ptr);
+    bool                   isInCurvedCorner(double x, double y);
+    bool                   hasPopupAt(const Vector2D& pos);
 
   private:
     // For hidden windows and stuff
diff --git a/src/config/ConfigManager.cpp b/src/config/ConfigManager.cpp
index 573a51c0..f463f9e6 100644
--- a/src/config/ConfigManager.cpp
+++ b/src/config/ConfigManager.cpp
@@ -46,6 +46,9 @@ void CConfigManager::setDefaultVars() {
     ((CGradientValueData*)configValues["general:col.inactive_border"].data.get())->reset(0xff444444);
     configValues["general:cursor_inactive_timeout"].intValue = 0;
     configValues["general:no_cursor_warps"].intValue         = 0;
+    configValues["general:resize_on_border"].intValue        = 0;
+    configValues["general:extend_border_grab_area"].intValue = 15;
+    configValues["general:hover_icon_on_border"].intValue    = 1;
 
     configValues["general:layout"].strValue = "dwindle";
 
diff --git a/src/helpers/Vector2D.cpp b/src/helpers/Vector2D.cpp
index 97a9685c..3ab3ce43 100644
--- a/src/helpers/Vector2D.cpp
+++ b/src/helpers/Vector2D.cpp
@@ -29,4 +29,10 @@ Vector2D Vector2D::floor() {
 
 Vector2D Vector2D::clamp(const Vector2D& min, const Vector2D& max) {
     return Vector2D(std::clamp(this->x, min.x, max.x == 0 ? INFINITY : max.x), std::clamp(this->y, min.y, max.y == 0 ? INFINITY : max.y));
-}
\ No newline at end of file
+}
+
+double Vector2D::distance(const Vector2D& other) {
+    double dx = x - other.x;
+    double dy = y - other.y;
+    return std::sqrt(dx * dx + dy * dy);
+}
diff --git a/src/helpers/Vector2D.hpp b/src/helpers/Vector2D.hpp
index f38e6a8d..f2943b28 100644
--- a/src/helpers/Vector2D.hpp
+++ b/src/helpers/Vector2D.hpp
@@ -42,8 +42,10 @@ class Vector2D {
     Vector2D operator/(const Vector2D& a) const {
         return Vector2D(this->x / a.x, this->y / a.y);
     }
+    
+    double   distance(const Vector2D& other);
 
     Vector2D clamp(const Vector2D& min, const Vector2D& max = Vector2D());
 
     Vector2D floor();
-};
\ No newline at end of file
+};
diff --git a/src/layout/IHyprLayout.cpp b/src/layout/IHyprLayout.cpp
index 888c159c..24e76035 100644
--- a/src/layout/IHyprLayout.cpp
+++ b/src/layout/IHyprLayout.cpp
@@ -195,10 +195,15 @@ void IHyprLayout::onBeginDragWindow() {
 void IHyprLayout::onEndDragWindow() {
     const auto DRAGGINGWINDOW = g_pInputManager->currentlyDraggedWindow;
 
-    g_pInputManager->unsetCursorImage();
-
-    if (!g_pCompositor->windowValidMapped(DRAGGINGWINDOW))
+    if (!g_pCompositor->windowValidMapped(DRAGGINGWINDOW)) {
+        if (DRAGGINGWINDOW) {
+            g_pInputManager->unsetCursorImage();
+            g_pInputManager->currentlyDraggedWindow = nullptr;
+        }
         return;
+    }
+
+    g_pInputManager->unsetCursorImage();
 
     g_pInputManager->currentlyDraggedWindow = nullptr;
 
diff --git a/src/managers/KeybindManager.cpp b/src/managers/KeybindManager.cpp
index 26bc3565..1965c935 100644
--- a/src/managers/KeybindManager.cpp
+++ b/src/managers/KeybindManager.cpp
@@ -294,6 +294,14 @@ bool CKeybindManager::onMouseEvent(wlr_pointer_button_event* e) {
     return !found && !mouseBindWasActive;
 }
 
+void CKeybindManager::resizeWithBorder(wlr_pointer_button_event* e) {
+    if (e->state == WLR_BUTTON_PRESSED) {
+        mouse("1resizewindow");
+    } else {
+        mouse("0resizewindow");
+    }
+}
+
 void CKeybindManager::onSwitchEvent(const std::string& switchName) {
     handleKeybinds(0, "switch:" + switchName, 0, 0, true, 0);
 }
diff --git a/src/managers/KeybindManager.hpp b/src/managers/KeybindManager.hpp
index 3ed09cb4..1c910873 100644
--- a/src/managers/KeybindManager.hpp
+++ b/src/managers/KeybindManager.hpp
@@ -39,6 +39,7 @@ class CKeybindManager {
     bool                                                              onKeyEvent(wlr_keyboard_key_event*, SKeyboard*);
     bool                                                              onAxisEvent(wlr_pointer_axis_event*);
     bool                                                              onMouseEvent(wlr_pointer_button_event*);
+    void                                                              resizeWithBorder(wlr_pointer_button_event*);
     void                                                              onSwitchEvent(const std::string&);
     void                                                              onSwitchOnEvent(const std::string&);
     void                                                              onSwitchOffEvent(const std::string&);
diff --git a/src/managers/input/InputManager.cpp b/src/managers/input/InputManager.cpp
index 342eaaa6..05b7f950 100644
--- a/src/managers/input/InputManager.cpp
+++ b/src/managers/input/InputManager.cpp
@@ -45,12 +45,17 @@ void CInputManager::simulateMouseMovement() {
 }
 
 void CInputManager::mouseMoveUnified(uint32_t time, bool refocus) {
-    static auto* const PFOLLOWMOUSE   = &g_pConfigManager->getConfigValuePtr("input:follow_mouse")->intValue;
-    static auto* const PMOUSEDPMS     = &g_pConfigManager->getConfigValuePtr("misc:mouse_move_enables_dpms")->intValue;
-    static auto* const PFOLLOWONDND   = &g_pConfigManager->getConfigValuePtr("misc:always_follow_on_dnd")->intValue;
-    static auto* const PHOGFOCUS      = &g_pConfigManager->getConfigValuePtr("misc:layers_hog_keyboard_focus")->intValue;
-    static auto* const PFLOATBEHAVIOR = &g_pConfigManager->getConfigValuePtr("input:float_switch_override_focus")->intValue;
-    static auto* const PMOUSEFOCUSMON = &g_pConfigManager->getConfigValuePtr("misc:mouse_move_focuses_monitor")->intValue;
+    static auto* const PFOLLOWMOUSE      = &g_pConfigManager->getConfigValuePtr("input:follow_mouse")->intValue;
+    static auto* const PMOUSEDPMS        = &g_pConfigManager->getConfigValuePtr("misc:mouse_move_enables_dpms")->intValue;
+    static auto* const PFOLLOWONDND      = &g_pConfigManager->getConfigValuePtr("misc:always_follow_on_dnd")->intValue;
+    static auto* const PHOGFOCUS         = &g_pConfigManager->getConfigValuePtr("misc:layers_hog_keyboard_focus")->intValue;
+    static auto* const PFLOATBEHAVIOR    = &g_pConfigManager->getConfigValuePtr("input:float_switch_override_focus")->intValue;
+    static auto* const PMOUSEFOCUSMON    = &g_pConfigManager->getConfigValuePtr("misc:mouse_move_focuses_monitor")->intValue;
+    static auto* const PRESIZEONBORDER   = &g_pConfigManager->getConfigValuePtr("general:resize_on_border")->intValue;
+    static auto* const PBORDERSIZE       = &g_pConfigManager->getConfigValuePtr("general:border_size")->intValue;
+    static auto* const PBORDERGRABEXTEND = &g_pConfigManager->getConfigValuePtr("general:extend_border_grab_area")->intValue;
+    static auto* const PRESIZECURSORICON = &g_pConfigManager->getConfigValuePtr("general:hover_icon_on_border")->intValue;
+    const auto         BORDER_GRAB_AREA  = *PRESIZEONBORDER ? *PBORDERSIZE + *PBORDERGRABEXTEND : 0;
 
     m_pFoundSurfaceToFocus      = nullptr;
     m_pFoundLSToFocus           = nullptr;
@@ -180,7 +185,8 @@ void CInputManager::mouseMoveUnified(uint32_t time, bool refocus) {
 
         // only check floating because tiled cant be over fullscreen
         for (auto w = g_pCompositor->m_vWindows.rbegin(); w != g_pCompositor->m_vWindows.rend(); w++) {
-            wlr_box box = {(*w)->m_vRealPosition.vec().x, (*w)->m_vRealPosition.vec().y, (*w)->m_vRealSize.vec().x, (*w)->m_vRealSize.vec().y};
+            wlr_box box = {(*w)->m_vRealPosition.vec().x - BORDER_GRAB_AREA, (*w)->m_vRealPosition.vec().y - BORDER_GRAB_AREA, (*w)->m_vRealSize.vec().x + 2 * BORDER_GRAB_AREA,
+                           (*w)->m_vRealSize.vec().y + 2 * BORDER_GRAB_AREA};
             if ((((*w)->m_bIsFloating && (*w)->m_bIsMapped && ((*w)->m_bCreatedOverFullscreen || (*w)->m_bPinned)) ||
                  (g_pCompositor->isWorkspaceSpecial((*w)->m_iWorkspaceID) && PMONITOR->specialWorkspaceID)) &&
                 wlr_box_contains_point(&box, mouseCoords.x, mouseCoords.y) && g_pCompositor->isWorkspaceVisible((*w)->m_iWorkspaceID) && !(*w)->isHidden()) {
@@ -298,6 +304,11 @@ void CInputManager::mouseMoveUnified(uint32_t time, bool refocus) {
     }
 
     if (pFoundWindow) {
+        // change cursor icon if hovering over border, skip if mouse bind is active
+        if (*PRESIZEONBORDER && *PRESIZECURSORICON && !pFoundWindow->m_bIsFullscreen && !pFoundWindow->hasPopupAt(mouseCoords)) {
+            setCursorIconOnBorder(pFoundWindow);
+        }
+
         if (*PFOLLOWMOUSE != 1 && !refocus) {
             if (pFoundWindow != g_pCompositor->m_pLastWindow && g_pCompositor->m_pLastWindow &&
                 ((pFoundWindow->m_bIsFloating && *PFLOATBEHAVIOR == 2) || (g_pCompositor->m_pLastWindow->m_bIsFloating != pFoundWindow->m_bIsFloating && *PFLOATBEHAVIOR != 0))) {
@@ -417,13 +428,28 @@ void CInputManager::setClickMode(eClickBehaviorMode mode) {
 void CInputManager::processMouseDownNormal(wlr_pointer_button_event* e) {
 
     // notify the keybind manager
-    static auto* const PPASSMOUSE   = &g_pConfigManager->getConfigValuePtr("binds:pass_mouse_when_bound")->intValue;
-    const auto         PASS         = g_pKeybindManager->onMouseEvent(e);
-    static auto* const PFOLLOWMOUSE = &g_pConfigManager->getConfigValuePtr("input:follow_mouse")->intValue;
+    static auto* const PPASSMOUSE      = &g_pConfigManager->getConfigValuePtr("binds:pass_mouse_when_bound")->intValue;
+    const auto         PASS            = g_pKeybindManager->onMouseEvent(e);
+    static auto* const PFOLLOWMOUSE    = &g_pConfigManager->getConfigValuePtr("input:follow_mouse")->intValue;
+    static auto* const PRESIZEONBORDER = &g_pConfigManager->getConfigValuePtr("general:resize_on_border")->intValue;
 
     if (!PASS && !*PPASSMOUSE)
         return;
 
+    // clicking on border triggers resize
+    // TODO detect click on LS properly
+    if (*PRESIZEONBORDER && !m_bLastFocusOnLS) {
+        const auto mouseCoords = g_pInputManager->getMouseCoordsInternal();
+        const auto w           = g_pCompositor->vectorToWindowIdeal(mouseCoords);
+        if (w && !w->m_bIsFullscreen) {
+            const wlr_box real = {w->m_vRealPosition.vec().x, w->m_vRealPosition.vec().y, w->m_vRealSize.vec().x, w->m_vRealSize.vec().y};
+            if ((!wlr_box_contains_point(&real, mouseCoords.x, mouseCoords.y) || w->isInCurvedCorner(mouseCoords.x, mouseCoords.y)) && !w->hasPopupAt(mouseCoords)) {
+                g_pKeybindManager->resizeWithBorder(e);
+                return;
+            }
+        }
+    }
+
     switch (e->state) {
         case WLR_BUTTON_PRESSED:
             if (*PFOLLOWMOUSE == 3) // don't refocus on full loose
@@ -1340,3 +1366,74 @@ void CInputManager::releaseAllMouseButtons() {
 
     m_lCurrentlyHeldButtons.clear();
 }
+
+void CInputManager::setCursorIconOnBorder(CWindow* w) {
+    // do not override cursor icons set by mouse binds
+    if (g_pKeybindManager->m_bIsMouseBindActive) {
+        m_eBorderIconDirection = BORDERICON_NONE;
+        return;
+    }
+
+    static auto* const PROUNDING   = &g_pConfigManager->getConfigValuePtr("decoration:rounding")->intValue;
+    static const auto* PBORDERSIZE = &g_pConfigManager->getConfigValuePtr("general:border_size")->intValue;
+    // give a small leeway (10 px) for corner icon
+    const auto           CORNER      = *PROUNDING + *PBORDERSIZE + 10;
+    const auto           mouseCoords = getMouseCoordsInternal();
+    wlr_box              box         = {w->m_vRealPosition.vec().x, w->m_vRealPosition.vec().y, w->m_vRealSize.vec().x, w->m_vRealSize.vec().y};
+    eBorderIconDirection direction   = BORDERICON_NONE;
+    if (wlr_box_contains_point(&box, mouseCoords.x, mouseCoords.y)) {
+        if (!w->isInCurvedCorner(mouseCoords.x, mouseCoords.y)) {
+            direction = BORDERICON_NONE;
+        } else {
+            if (mouseCoords.y < box.y + CORNER) {
+                if (mouseCoords.x < box.x + CORNER)
+                    direction = BORDERICON_UP_LEFT;
+                else
+                    direction = BORDERICON_UP_RIGHT;
+            } else {
+                if (mouseCoords.x < box.x + CORNER)
+                    direction = BORDERICON_DOWN_LEFT;
+                else
+                    direction = BORDERICON_DOWN_RIGHT;
+            }
+        }
+    } else {
+        if (mouseCoords.y < box.y + CORNER) {
+            if (mouseCoords.x < box.x + CORNER)
+                direction = BORDERICON_UP_LEFT;
+            else if (mouseCoords.x > box.x + box.width - CORNER)
+                direction = BORDERICON_UP_RIGHT;
+            else
+                direction = BORDERICON_UP;
+        } else if (mouseCoords.y > box.y + box.height - CORNER) {
+            if (mouseCoords.x < box.x + CORNER)
+                direction = BORDERICON_DOWN_LEFT;
+            else if (mouseCoords.x > box.x + box.width - CORNER)
+                direction = BORDERICON_DOWN_RIGHT;
+            else
+                direction = BORDERICON_DOWN;
+        } else {
+            if (mouseCoords.x < box.x + CORNER)
+                direction = BORDERICON_LEFT;
+            else if (mouseCoords.x > box.x + box.width - CORNER)
+                direction = BORDERICON_RIGHT;
+        }
+    }
+
+    if (direction == m_eBorderIconDirection)
+        return;
+
+    m_eBorderIconDirection = direction;
+
+    switch (direction) {
+        case BORDERICON_NONE: unsetCursorImage(); break;
+        case BORDERICON_UP: setCursorImageUntilUnset("top_side"); break;
+        case BORDERICON_DOWN: setCursorImageUntilUnset("bottom_side"); break;
+        case BORDERICON_LEFT: setCursorImageUntilUnset("left_side"); break;
+        case BORDERICON_RIGHT: setCursorImageUntilUnset("right_side"); break;
+        case BORDERICON_UP_LEFT: setCursorImageUntilUnset("top_left_corner"); break;
+        case BORDERICON_DOWN_LEFT: setCursorImageUntilUnset("bottom_left_corner"); break;
+        case BORDERICON_UP_RIGHT: setCursorImageUntilUnset("top_right_corner"); break;
+        case BORDERICON_DOWN_RIGHT: setCursorImageUntilUnset("bottom_right_corner"); break;
+    }
+}
diff --git a/src/managers/input/InputManager.hpp b/src/managers/input/InputManager.hpp
index 525b5c85..af31118c 100644
--- a/src/managers/input/InputManager.hpp
+++ b/src/managers/input/InputManager.hpp
@@ -7,19 +7,29 @@
 #include "../../helpers/Timer.hpp"
 #include "InputMethodRelay.hpp"
 
-enum eClickBehaviorMode
-{
+enum eClickBehaviorMode {
     CLICKMODE_DEFAULT = 0,
     CLICKMODE_KILL
 };
 
-enum eMouseBindMode
-{
+enum eMouseBindMode {
     MBIND_INVALID = -1,
     MBIND_MOVE    = 0,
     MBIND_RESIZE
 };
 
+enum eBorderIconDirection {
+    BORDERICON_NONE,
+    BORDERICON_UP,
+    BORDERICON_DOWN,
+    BORDERICON_LEFT,
+    BORDERICON_RIGHT,
+    BORDERICON_UP_LEFT,
+    BORDERICON_DOWN_LEFT,
+    BORDERICON_UP_RIGHT,
+    BORDERICON_DOWN_RIGHT,
+};
+
 struct STouchData {
     CWindow*       touchFocusWindow  = nullptr;
     SLayerSurface* touchFocusLS      = nullptr;
@@ -165,7 +175,8 @@ class CInputManager {
     bool m_bLastInputTouch = false;
 
   private:
-    bool m_bCursorImageOverriden = false;
+    bool                 m_bCursorImageOverriden = false;
+    eBorderIconDirection m_eBorderIconDirection  = BORDERICON_NONE;
 
     // for click behavior override
     eClickBehaviorMode m_ecbClickBehavior      = CLICKMODE_DEFAULT;
@@ -196,6 +207,9 @@ class CInputManager {
     // swipe
     void beginWorkspaceSwipe();
 
+    void setBorderCursorIcon(eBorderIconDirection);
+    void setCursorIconOnBorder(CWindow* w);
+
     friend class CKeybindManager;
 };