RemdesKVM/remdeskd/mod/remdeshid/ch9329.go

package remdeshid

import (
	"fmt"
	"time"
)

func (c *Controller) IsModifierKeys(keycode int) bool {
	// Modifier keycodes for JavaScript
	modifierKeys := []int{16, 17, 18, 91} // Shift, Ctrl, Alt, Meta (Windows/Command key)
	for _, key := range modifierKeys {
		if keycode == key {
			return true
		}
	}
	return false
}

// ConstructAndSendCmd constructs a HID command based on the provided HIDCommand and sends it.
func (c *Controller) ConstructAndSendCmd(HIDCommand *HIDCommand) ([]byte, error) {
	switch HIDCommand.Event {
	case EventTypeKeyPress:
		if IsModifierKey(uint8(HIDCommand.Keycode)) {
			//modifier keys
			return c.SetModifierKey(uint8(HIDCommand.Keycode), HIDCommand.IsRightModKey)
		} else if HIDCommand.Keycode == 13 && HIDCommand.IsRightModKey {
			// Numpad enter
			return c.SendKeyboardPress(uint8(146))
		}
		return c.SendKeyboardPress(uint8(HIDCommand.Keycode))
	case EventTypeKeyRelease:
		if IsModifierKey(uint8(HIDCommand.Keycode)) {
			//modifier keys
			return c.UnsetModifierKey(uint8(HIDCommand.Keycode), HIDCommand.IsRightModKey)
		} else if HIDCommand.Keycode == 13 && HIDCommand.IsRightModKey {
			// Numpad enter
			return c.SendKeyboardRelease(uint8(146))
		}
		return c.SendKeyboardRelease(uint8(HIDCommand.Keycode))
	case EventTypeMouseMove:
		if time.Now().UnixMilli()-c.lastCursorEventTime < MinCusorEventInterval {
			// Ignore mouse move events that are too close together
			return []byte{}, nil
		}
		c.lastCursorEventTime = time.Now().UnixMilli()
		if HIDCommand.MouseAbsX != 0 || HIDCommand.MouseAbsY != 0 {
			xLSB := byte(HIDCommand.MouseAbsX & 0xFF)        // Extract LSB of X
			xMSB := byte((HIDCommand.MouseAbsX >> 8) & 0xFF) // Extract MSB of X
			yLSB := byte(HIDCommand.MouseAbsY & 0xFF)        // Extract LSB of Y
			yMSB := byte((HIDCommand.MouseAbsY >> 8) & 0xFF) // Extract MSB of Y
			return c.MouseMoveAbsolute(xLSB, xMSB, yLSB, yMSB)
		} else if HIDCommand.MouseRelX != 0 || HIDCommand.MouseRelY != 0 {
			//Todo
		}
		return []byte{}, nil
	case EventTypeMousePress:
		if HIDCommand.MouseButton < 1 || HIDCommand.MouseButton > 3 {
			return nil, fmt.Errorf("invalid mouse button: %d", HIDCommand.MouseButton)
		}
		button := uint8(HIDCommand.MouseButton)
		return c.MouseButtonPress(button)
	case EventTypeMouseRelease:
		if HIDCommand.MouseButton < 1 || HIDCommand.MouseButton > 3 {
			return nil, fmt.Errorf("invalid mouse button: %d", HIDCommand.MouseButton)
		}
		button := uint8(HIDCommand.MouseButton)
		return c.MouseButtonRelease(button)
	case EventTypeMouseScroll:
		if time.Now().UnixMilli()-c.lastCursorEventTime < MinCusorEventInterval {
			// Ignore mouse move events that are too close together
			return []byte{}, nil
		}
		c.lastCursorEventTime = time.Now().UnixMilli()
		return c.MouseScroll(HIDCommand.MouseScroll)
	default:
		return nil, fmt.Errorf("unsupported HID command event type: %d", HIDCommand.Event)
	}
}