x11: add XPanelWindow

src/x11/util.cpp

@@ -0,0 +1,55 @@
+#include "util.hpp"
+
+#include <qbytearray.h>
+#include <qguiapplication.h>
+#include <qguiapplication_platform.h>
+#include <xcb/xcb.h>
+#include <xcb/xproto.h>
+
+xcb_connection_t* x11Connection() {
+	static xcb_connection_t* conn = nullptr; // NOLINT
+
+	if (conn == nullptr) {
+		if (auto* x11Application = dynamic_cast<QGuiApplication*>(QGuiApplication::instance())
+		                               ->nativeInterface<QNativeInterface::QX11Application>())
+		{
+			conn = x11Application->connection();
+		}
+	}
+
+	return conn;
+}
+
+// NOLINTBEGIN
+XAtom XAtom::_NET_WM_STRUT {};
+XAtom XAtom::_NET_WM_STRUT_PARTIAL {};
+// NOLINTEND
+
+void XAtom::initAtoms() {
+	_NET_WM_STRUT.init("_NET_WM_STRUT");
+	_NET_WM_STRUT_PARTIAL.init("_NET_WM_STRUT_PARTIAL");
+}
+
+void XAtom::init(const QByteArray& name) {
+	this->cookie = xcb_intern_atom(x11Connection(), 0, name.length(), name.data());
+}
+
+bool XAtom::isValid() {
+	this->resolve();
+	return this->mAtom != XCB_ATOM_NONE;
+}
+
+const xcb_atom_t& XAtom::atom() {
+	this->resolve();
+	return this->mAtom;
+}
+
+void XAtom::resolve() {
+	if (!this->resolved) {
+		this->resolved = true;
+
+		auto* reply = xcb_intern_atom_reply(x11Connection(), this->cookie, nullptr);
+		if (reply != nullptr) this->mAtom = reply->atom;
+		free(reply); // NOLINT
+	}
+}