xwm: Minor cleanup, add wrappers for basic types (#7856)

src/xwayland/XDataSource.cpp

@@ -1,8 +1,8 @@
 #ifndef NO_XWAYLAND
 
-#include "XDataSource.hpp"
 #include "XWayland.hpp"
 #include "../defines.hpp"
+#include "XDataSource.hpp"
 
 #include <fcntl.h>
 

src/xwayland/XSurface.cpp

@@ -5,8 +5,8 @@
 
 #ifndef NO_XWAYLAND
 
-#include "../Compositor.hpp"
 #include <ranges>
+#include "../Compositor.hpp"
 
 CXWaylandSurface::CXWaylandSurface(uint32_t xID_, CBox geometry_, bool OR) : xID(xID_), geometry(geometry_), overrideRedirect(OR) {
     xcb_res_query_client_ids_cookie_t client_id_cookie = {0};
@@ -196,12 +196,11 @@ void CXWaylandSurface::restackToTop() {
 
     xcb_configure_window(g_pXWayland->pWM->connection, xID, XCB_CONFIG_WINDOW_STACK_MODE, values);
 
-    for (auto it = g_pXWayland->pWM->mappedSurfacesStacking.begin(); it != g_pXWayland->pWM->mappedSurfacesStacking.end(); ++it) {
-        if (*it == self) {
-            std::rotate(it, it + 1, g_pXWayland->pWM->mappedSurfacesStacking.end());
-            break;
-        }
-    }
+    auto& stack = g_pXWayland->pWM->mappedSurfacesStacking;
+    auto  it    = std::find(stack.begin(), stack.end(), self);
+
+    if (it != stack.end())
+        std::rotate(it, it + 1, stack.end());
 
     g_pXWayland->pWM->updateClientList();
 

src/xwayland/XWM.cpp

@@ -1,20 +1,21 @@
 #include "helpers/math/Math.hpp"
+#include <cstdint>
 #ifndef NO_XWAYLAND
 
+#include <ranges>
+#include <fcntl.h>
+#include <cstring>
+#include <algorithm>
+#include <unordered_map>
+#include <xcb/xcb_icccm.h>
+
 #include "XWayland.hpp"
 #include "../defines.hpp"
-#include <unordered_map>
 #include "../Compositor.hpp"
+#include "../protocols/core/Seat.hpp"
+#include "../managers/SeatManager.hpp"
 #include "../protocols/XWaylandShell.hpp"
 #include "../protocols/core/Compositor.hpp"
-#include "../managers/SeatManager.hpp"
-#include "../protocols/core/Seat.hpp"
-#include <ranges>
-#include <algorithm>
-#include <fcntl.h>
-#include <cstring>
-
-#include <xcb/xcb_icccm.h>
 
 #define XCB_EVENT_RESPONSE_TYPE_MASK 0x7f
 #define INCR_CHUNK_SIZE              (64 * 1024)
@@ -830,15 +831,15 @@ void CXWM::getRenderFormat() {
     free(reply);
 }
 
-CXWM::CXWM() {
-    connection = xcb_connect_to_fd(g_pXWayland->pServer->xwmFDs[0], nullptr);
+CXWM::CXWM() : connection(g_pXWayland->pServer->xwmFDs[0]) {
 
-    if (int ret = xcb_connection_has_error(connection); ret) {
-        Debug::log(ERR, "[xwm] Couldn't start, error {}", ret);
+    if (connection.hasError()) {
+        Debug::log(ERR, "[xwm] Couldn't start, error {}", connection.hasError());
         return;
     }
 
-    if (xcb_errors_context_new(connection, &errors)) {
+    CXCBErrorContext xcbErrCtx(connection);
+    if (!xcbErrCtx.isValid()) {
         Debug::log(ERR, "[xwm] Couldn't allocate errors context");
         return;
     }
@@ -867,10 +868,7 @@ CXWM::CXWM() {
     };
     xcb_change_property(connection, XCB_PROP_MODE_REPLACE, screen->root, HYPRATOMS["_NET_SUPPORTED"], XCB_ATOM_ATOM, 32, sizeof(supported) / sizeof(*supported), supported);
 
-    xcb_flush(connection);
-
     setActiveWindow(XCB_WINDOW_NONE);
-
     initSelection();
 
     listeners.newWLSurface     = PROTO::compositor->events.newSurface.registerListener([this](std::any d) { onNewSurface(std::any_cast<SP<CWLSurfaceResource>>(d)); });
@@ -882,11 +880,6 @@ CXWM::CXWM() {
 }
 
 CXWM::~CXWM() {
-    if (errors)
-        xcb_errors_context_free(errors);
-
-    if (connection)
-        xcb_disconnect(connection);
 
     if (eventSource)
         wl_event_source_remove(eventSource);

src/xwayland/XWM.hpp

@@ -1,17 +1,16 @@
 #pragma once
 
-#include "../helpers/signal/Signal.hpp"
-#include "../helpers/memory/Memory.hpp"
-#include "../helpers/WLListener.hpp"
 #include "../macros.hpp"
-
 #include "XDataSource.hpp"
+#include "../helpers/WLListener.hpp"
+#include "../helpers/memory/Memory.hpp"
+#include "../helpers/signal/Signal.hpp"
 
 #include <xcb/xcb.h>
-#include <xcb/xcb_errors.h>
-#include <xcb/composite.h>
-#include <xcb/xfixes.h>
 #include <xcb/res.h>
+#include <xcb/xfixes.h>
+#include <xcb/composite.h>
+#include <xcb/xcb_errors.h>
 
 struct wl_event_source;
 class CXWaylandSurfaceResource;
@@ -58,6 +57,49 @@ struct SXSelection {
     std::unique_ptr<SXTransfer> transfer;
 };
 
+class CXCBConnection {
+  public:
+    CXCBConnection(int fd) {
+        connection = xcb_connect_to_fd(fd, nullptr);
+    }
+
+    ~CXCBConnection() {
+        if (connection)
+            xcb_disconnect(connection);
+    }
+
+    bool hasError() const {
+        return xcb_connection_has_error(connection);
+    }
+
+    operator xcb_connection_t*() const {
+        return connection;
+    }
+
+  private:
+    xcb_connection_t* connection = nullptr;
+};
+
+class CXCBErrorContext {
+  public:
+    explicit CXCBErrorContext(xcb_connection_t* connection) {
+        if (xcb_errors_context_new(connection, &errors) != 0)
+            errors = nullptr;
+    }
+
+    ~CXCBErrorContext() {
+        if (errors)
+            xcb_errors_context_free(errors);
+    }
+
+    bool isValid() const {
+        return errors != nullptr;
+    }
+
+  private:
+    xcb_errors_context_t* errors = nullptr;
+};
+
 class CXWM {
   public:
     CXWM();
@@ -123,7 +165,7 @@ class CXWM {
     void        readProp(SP<CXWaylandSurface> XSURF, uint32_t atom, xcb_get_property_reply_t* reply);
 
     //
-    xcb_connection_t*                         connection = nullptr;
+    CXCBConnection                            connection;
     xcb_errors_context_t*                     errors = nullptr;
     xcb_screen_t*                             screen = nullptr;