Adding template project

vendor/rmlui_backend/RmlUi_Platform_X11.h

@@ -0,0 +1,75 @@
+#pragma once
+
+#include "RmlUi_Include_Xlib.h"
+#include <RmlUi/Core/Input.h>
+#include <RmlUi/Core/SystemInterface.h>
+#include <RmlUi/Core/Types.h>
+#include <X11/Xutil.h>
+
+class SystemInterface_X11 : public Rml::SystemInterface {
+public:
+	SystemInterface_X11(Display* display);
+
+	// Optionally, provide or change the window to be used for setting the mouse cursors and clipboard text.
+	void SetWindow(Window window);
+
+	// Handle selection request events.
+	// @return True if the event is still propagating, false if it was handled here.
+	bool HandleSelectionRequest(const XEvent& ev);
+
+	// -- Inherited from Rml::SystemInterface  --
+
+	double GetElapsedTime() override;
+
+	void SetMouseCursor(const Rml::String& cursor_name) override;
+
+	void SetClipboardText(const Rml::String& text) override;
+	void GetClipboardText(Rml::String& text) override;
+
+private:
+	void XCopy(const Rml::String& clipboard_data, const XEvent& event);
+	bool XPaste(Atom target_atom, Rml::String& clipboard_data);
+
+	Display* display = nullptr;
+	Window window = 0;
+	timeval start_time;
+
+	Cursor cursor_default = 0;
+	Cursor cursor_move = 0;
+	Cursor cursor_pointer = 0;
+	Cursor cursor_resize = 0;
+	Cursor cursor_cross = 0;
+	Cursor cursor_text = 0;
+	Cursor cursor_unavailable = 0;
+
+	// -- Clipboard
+	Rml::String clipboard_text;
+	Atom XA_atom = 4;
+	Atom XA_STRING_atom = 31;
+	Atom UTF8_atom;
+	Atom CLIPBOARD_atom;
+	Atom XSEL_DATA_atom;
+	Atom TARGETS_atom;
+	Atom TEXT_atom;
+};
+
+/**
+    Optional helper functions for the X11 plaform.
+ */
+namespace RmlX11 {
+
+// Applies input on the context based on the given SFML event.
+// @return True if the event is still propagating, false if it was handled by the context.
+bool HandleInputEvent(Rml::Context* context, Display* display, const XEvent& ev);
+
+// Converts the X11 key code to RmlUi key.
+// @note The display must be passed here as it needs to query the connected X server display for information about its install keymap abilities.
+Rml::Input::KeyIdentifier ConvertKey(Display* display, unsigned int x11_key_code);
+
+// Converts the X11 mouse button to RmlUi mouse button.
+int ConvertMouseButton(unsigned int x11_mouse_button);
+
+// Converts the X11 key modifier to RmlUi key modifier.
+int GetKeyModifierState(int x11_state);
+
+} // namespace RmlX11