mirror of
https://github.com/netbirdio/netbird.git
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Wails UI
This commit is contained in:
Zoltán Papp
393
client/uiwails/xembed_host_linux.go
Normal file
393
client/uiwails/xembed_host_linux.go
Normal file
@@ -0,0 +1,393 @@
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//go:build linux && !(linux && 386)
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package main
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/*
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#cgo pkg-config: x11 gtk+-3.0
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#cgo LDFLAGS: -lX11
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#include "xembed_tray.h"
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#include <X11/Xlib.h>
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#include <stdlib.h>
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*/
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import "C"
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import (
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"errors"
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"sync"
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"time"
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"unsafe"
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"github.com/godbus/dbus/v5"
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log "github.com/sirupsen/logrus"
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)
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// activeMenuHost is the xembedHost that currently owns the popup menu.
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// This is needed because C callbacks cannot carry Go pointers.
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var (
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activeMenuHost *xembedHost
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activeMenuHostMu sync.Mutex
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)
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//export goMenuItemClicked
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func goMenuItemClicked(id C.int) {
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activeMenuHostMu.Lock()
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h := activeMenuHost
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activeMenuHostMu.Unlock()
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if h != nil {
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go h.sendMenuEvent(int32(id))
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}
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}
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// xembedHost manages one XEmbed tray icon for an SNI item.
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type xembedHost struct {
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conn *dbus.Conn
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busName string
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objPath dbus.ObjectPath
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dpy *C.Display
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trayMgr C.Window
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iconWin C.Window
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iconSize int
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mu sync.Mutex
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iconData []byte
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iconW int
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iconH int
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stopCh chan struct{}
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}
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// newXembedHost creates an XEmbed tray icon for the given SNI item.
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// Returns an error if no XEmbed tray manager is available (graceful fallback).
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func newXembedHost(conn *dbus.Conn, busName string, objPath dbus.ObjectPath) (*xembedHost, error) {
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dpy := C.XOpenDisplay(nil)
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if dpy == nil {
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return nil, errors.New("cannot open X display")
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}
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screen := C.xembed_default_screen(dpy)
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trayMgr := C.xembed_find_tray(dpy, screen)
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if trayMgr == 0 {
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C.XCloseDisplay(dpy)
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return nil, errors.New("no XEmbed system tray found")
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}
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// Query the tray manager's preferred icon size.
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iconSize := int(C.xembed_get_icon_size(dpy, trayMgr))
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if iconSize <= 0 {
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iconSize = 24 // fallback
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}
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iconWin := C.xembed_create_icon(dpy, screen, C.int(iconSize), trayMgr)
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if iconWin == 0 {
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C.XCloseDisplay(dpy)
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return nil, errors.New("failed to create icon window")
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}
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if C.xembed_dock(dpy, trayMgr, iconWin) != 0 {
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C.xembed_destroy_icon(dpy, iconWin)
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C.XCloseDisplay(dpy)
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return nil, errors.New("failed to dock icon")
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}
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h := &xembedHost{
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conn: conn,
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busName: busName,
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objPath: objPath,
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dpy: dpy,
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trayMgr: trayMgr,
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iconWin: iconWin,
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iconSize: iconSize,
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stopCh: make(chan struct{}),
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}
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h.fetchAndDrawIcon()
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return h, nil
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}
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// fetchAndDrawIcon reads IconPixmap from the SNI item via D-Bus and draws it.
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func (h *xembedHost) fetchAndDrawIcon() {
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obj := h.conn.Object(h.busName, h.objPath)
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variant, err := obj.GetProperty("org.kde.StatusNotifierItem.IconPixmap")
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if err != nil {
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log.Debugf("xembed: failed to get IconPixmap: %v", err)
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return
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}
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// IconPixmap is []struct{W, H int32; Pix []byte} on D-Bus,
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// represented as a(iiay) signature.
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type px struct {
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W int32
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H int32
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Pix []byte
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}
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var icons []px
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if err := variant.Store(&icons); err != nil {
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log.Debugf("xembed: failed to decode IconPixmap: %v", err)
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return
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}
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if len(icons) == 0 {
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log.Debug("xembed: IconPixmap is empty")
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return
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}
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icon := icons[0]
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if icon.W <= 0 || icon.H <= 0 || len(icon.Pix) < int(icon.W*icon.H*4) {
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log.Debug("xembed: invalid IconPixmap data")
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return
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}
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h.mu.Lock()
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h.iconData = icon.Pix
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h.iconW = int(icon.W)
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h.iconH = int(icon.H)
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h.mu.Unlock()
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h.drawIcon()
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}
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// drawIcon draws the cached icon data onto the X11 window.
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func (h *xembedHost) drawIcon() {
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h.mu.Lock()
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data := h.iconData
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w := h.iconW
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ht := h.iconH
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h.mu.Unlock()
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if data == nil || w <= 0 || ht <= 0 {
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return
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}
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cData := C.CBytes(data)
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defer C.free(cData)
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C.xembed_draw_icon(h.dpy, h.iconWin, C.int(h.iconSize),
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(*C.uchar)(cData), C.int(w), C.int(ht))
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}
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// run is the main event loop. It polls X11 events and listens for D-Bus
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// NewIcon signals to keep the tray icon updated.
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func (h *xembedHost) run() {
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// Subscribe to NewIcon signals from the SNI item.
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matchRule := "type='signal',interface='org.kde.StatusNotifierItem',member='NewIcon',sender='" + h.busName + "'"
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if err := h.conn.BusObject().Call("org.freedesktop.DBus.AddMatch", 0, matchRule).Err; err != nil {
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log.Debugf("xembed: failed to add signal match: %v", err)
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}
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sigCh := make(chan *dbus.Signal, 16)
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h.conn.Signal(sigCh)
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defer h.conn.RemoveSignal(sigCh)
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ticker := time.NewTicker(50 * time.Millisecond)
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defer ticker.Stop()
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for {
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select {
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case <-h.stopCh:
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return
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case sig := <-sigCh:
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if sig == nil {
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continue
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}
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if sig.Name == "org.kde.StatusNotifierItem.NewIcon" {
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h.fetchAndDrawIcon()
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}
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case <-ticker.C:
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var outX, outY C.int
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result := C.xembed_poll_event(h.dpy, h.iconWin, &outX, &outY)
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switch result {
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case 1: // left click
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go h.activate(int32(outX), int32(outY))
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case 2: // right click
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log.Infof("xembed: right-click at (%d, %d)", int(outX), int(outY))
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go h.contextMenu(int32(outX), int32(outY))
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case 3: // expose
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h.drawIcon()
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case 4: // configure (resize)
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newSize := int(outX)
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if newSize > 0 && newSize != h.iconSize {
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h.iconSize = newSize
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h.drawIcon()
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}
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case -1: // tray died
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log.Info("xembed: tray manager destroyed, cleaning up")
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return
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}
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}
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}
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}
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func (h *xembedHost) activate(x, y int32) {
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obj := h.conn.Object(h.busName, h.objPath)
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if err := obj.Call("org.kde.StatusNotifierItem.Activate", 0, x, y).Err; err != nil {
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log.Debugf("xembed: Activate call failed: %v", err)
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}
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}
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func (h *xembedHost) contextMenu(x, y int32) {
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// Read the menu path from the SNI item's Menu property.
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menuPath := dbus.ObjectPath("/StatusNotifierMenu")
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// Fetch menu layout from com.canonical.dbusmenu.
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menuObj := h.conn.Object(h.busName, menuPath)
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var revision uint32
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var layout dbusMenuLayout
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err := menuObj.Call("com.canonical.dbusmenu.GetLayout", 0,
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int32(0), // parentId (root)
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int32(-1), // recursionDepth (all)
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[]string{}, // propertyNames (all)
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).Store(&revision, &layout)
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if err != nil {
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log.Debugf("xembed: GetLayout failed: %v", err)
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return
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}
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items := h.flattenMenu(layout)
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log.Infof("xembed: menu has %d items (revision %d)", len(items), revision)
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for i, mi := range items {
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log.Infof("xembed: menu[%d] id=%d label=%q sep=%v check=%v", i, mi.id, mi.label, mi.isSeparator, mi.isCheck)
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}
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if len(items) == 0 {
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return
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}
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// Build C menu item array.
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cItems := make([]C.xembed_menu_item, len(items))
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cLabels := make([]*C.char, len(items)) // track for freeing
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for i, mi := range items {
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cItems[i].id = C.int(mi.id)
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cItems[i].enabled = boolToInt(mi.enabled)
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cItems[i].is_check = boolToInt(mi.isCheck)
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cItems[i].checked = boolToInt(mi.checked)
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cItems[i].is_separator = boolToInt(mi.isSeparator)
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if mi.label != "" {
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cLabels[i] = C.CString(mi.label)
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cItems[i].label = cLabels[i]
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}
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}
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defer func() {
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for _, p := range cLabels {
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if p != nil {
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C.free(unsafe.Pointer(p))
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}
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}
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}()
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// Set the active menu host so the C callback can reach us.
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activeMenuHostMu.Lock()
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activeMenuHost = h
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activeMenuHostMu.Unlock()
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C.xembed_show_popup_menu(&cItems[0], C.int(len(cItems)),
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nil, C.int(x), C.int(y))
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}
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// dbusMenuLayout represents a com.canonical.dbusmenu layout item.
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type dbusMenuLayout struct {
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ID int32
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Properties map[string]dbus.Variant
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Children []dbus.Variant
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}
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type menuItemInfo struct {
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id int32
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label string
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enabled bool
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isCheck bool
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checked bool
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isSeparator bool
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}
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func (h *xembedHost) flattenMenu(layout dbusMenuLayout) []menuItemInfo {
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var items []menuItemInfo
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for _, childVar := range layout.Children {
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var child dbusMenuLayout
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if err := dbus.Store([]interface{}{childVar.Value()}, &child); err != nil {
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continue
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}
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mi := menuItemInfo{
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id: child.ID,
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enabled: true,
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}
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if v, ok := child.Properties["type"]; ok {
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if s, ok := v.Value().(string); ok && s == "separator" {
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mi.isSeparator = true
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items = append(items, mi)
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continue
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}
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}
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if v, ok := child.Properties["label"]; ok {
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if s, ok := v.Value().(string); ok {
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mi.label = s
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}
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}
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if v, ok := child.Properties["enabled"]; ok {
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if b, ok := v.Value().(bool); ok {
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mi.enabled = b
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}
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}
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if v, ok := child.Properties["visible"]; ok {
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if b, ok := v.Value().(bool); ok && !b {
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continue // skip hidden items
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}
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}
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if v, ok := child.Properties["toggle-type"]; ok {
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if s, ok := v.Value().(string); ok && s == "checkmark" {
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mi.isCheck = true
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}
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}
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if v, ok := child.Properties["toggle-state"]; ok {
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if n, ok := v.Value().(int32); ok && n == 1 {
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mi.checked = true
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}
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}
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items = append(items, mi)
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}
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return items
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}
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func (h *xembedHost) sendMenuEvent(id int32) {
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menuPath := dbus.ObjectPath("/StatusNotifierMenu")
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menuObj := h.conn.Object(h.busName, menuPath)
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data := dbus.MakeVariant("")
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err := menuObj.Call("com.canonical.dbusmenu.Event", 0,
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id, "clicked", data, uint32(0)).Err
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if err != nil {
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log.Debugf("xembed: menu Event call failed: %v", err)
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}
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}
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func boolToInt(b bool) C.int {
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if b {
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return 1
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}
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return 0
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}
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func (h *xembedHost) stop() {
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select {
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case <-h.stopCh:
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return // already stopped
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default:
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close(h.stopCh)
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}
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C.xembed_destroy_icon(h.dpy, h.iconWin)
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C.XCloseDisplay(h.dpy)
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}
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