[pkg] add temporary vendoring of getlantern/systray to fix win bug

this adds upstream PR #74

1 files changed, 181 insertions, 0 deletions

diff --git a/vendor/github.com/getlantern/systray/systray.go b/vendor/github.com/getlantern/systray/systray.go
new file mode 100644
index 0000000..d433173
--- /dev/null
+++ b/vendor/github.com/getlantern/systray/systray.go
@@ -0,0 +1,181 @@
+/*
+Package systray is a cross platfrom Go library to place an icon and menu in the
+notification area.
+Supports Windows, Mac OSX and Linux currently.
+Methods can be called from any goroutine except Run(), which should be called
+at the very beginning of main() to lock at main thread.
+*/
+package systray
+
+import (
+	"runtime"
+	"sync"
+	"sync/atomic"
+
+	"github.com/getlantern/golog"
+)
+
+var (
+	hasStarted = int64(0)
+	hasQuit    = int64(0)
+)
+
+// MenuItem is used to keep track each menu item of systray
+// Don't create it directly, use the one systray.AddMenuItem() returned
+type MenuItem struct {
+	// ClickedCh is the channel which will be notified when the menu item is clicked
+	ClickedCh chan struct{}
+
+	// id uniquely identify a menu item, not supposed to be modified
+	id int32
+	// title is the text shown on menu item
+	title string
+	// tooltip is the text shown when pointing to menu item
+	tooltip string
+	// disabled menu item is grayed out and has no effect when clicked
+	disabled bool
+	// checked menu item has a tick before the title
+	checked bool
+}
+
+var (
+	log = golog.LoggerFor("systray")
+
+	systrayReady  func()
+	systrayExit   func()
+	menuItems     = make(map[int32]*MenuItem)
+	menuItemsLock sync.RWMutex
+
+	currentID = int32(-1)
+)
+
+// Run initializes GUI and starts the event loop, then invokes the onReady
+// callback.
+// It blocks until systray.Quit() is called.
+// Should be called at the very beginning of main() to lock at main thread.
+func Run(onReady func(), onExit func()) {
+	runtime.LockOSThread()
+	atomic.StoreInt64(&hasStarted, 1)
+
+	if onReady == nil {
+		systrayReady = func() {}
+	} else {
+		// Run onReady on separate goroutine to avoid blocking event loop
+		readyCh := make(chan interface{})
+		go func() {
+			<-readyCh
+			onReady()
+		}()
+		systrayReady = func() {
+			close(readyCh)
+		}
+	}
+
+	// unlike onReady, onExit runs in the event loop to make sure it has time to
+	// finish before the process terminates
+	if onExit == nil {
+		onExit = func() {}
+	}
+	systrayExit = onExit
+
+	nativeLoop()
+}
+
+// Quit the systray
+func Quit() {
+	if atomic.LoadInt64(&hasStarted) == 1 && atomic.CompareAndSwapInt64(&hasQuit, 0, 1) {
+		quit()
+	}
+}
+
+// AddMenuItem adds menu item with designated title and tooltip, returning a channel
+// that notifies whenever that menu item is clicked.
+//
+// It can be safely invoked from different goroutines.
+func AddMenuItem(title string, tooltip string) *MenuItem {
+	id := atomic.AddInt32(&currentID, 1)
+	item := &MenuItem{nil, id, title, tooltip, false, false}
+	item.ClickedCh = make(chan struct{})
+	item.update()
+	return item
+}
+
+// AddSeparator adds a separator bar to the menu
+func AddSeparator() {
+	addSeparator(atomic.AddInt32(&currentID, 1))
+}
+
+// SetTitle set the text to display on a menu item
+func (item *MenuItem) SetTitle(title string) {
+	item.title = title
+	item.update()
+}
+
+// SetTooltip set the tooltip to show when mouse hover
+func (item *MenuItem) SetTooltip(tooltip string) {
+	item.tooltip = tooltip
+	item.update()
+}
+
+// Disabled checkes if the menu item is disabled
+func (item *MenuItem) Disabled() bool {
+	return item.disabled
+}
+
+// Enable a menu item regardless if it's previously enabled or not
+func (item *MenuItem) Enable() {
+	item.disabled = false
+	item.update()
+}
+
+// Disable a menu item regardless if it's previously disabled or not
+func (item *MenuItem) Disable() {
+	item.disabled = true
+	item.update()
+}
+
+// Hide hides a menu item
+func (item *MenuItem) Hide() {
+	hideMenuItem(item)
+}
+
+// Show shows a previously hidden menu item
+func (item *MenuItem) Show() {
+	showMenuItem(item)
+}
+
+// Checked returns if the menu item has a check mark
+func (item *MenuItem) Checked() bool {
+	return item.checked
+}
+
+// Check a menu item regardless if it's previously checked or not
+func (item *MenuItem) Check() {
+	item.checked = true
+	item.update()
+}
+
+// Uncheck a menu item regardless if it's previously unchecked or not
+func (item *MenuItem) Uncheck() {
+	item.checked = false
+	item.update()
+}
+
+// update propogates changes on a menu item to systray
+func (item *MenuItem) update() {
+	menuItemsLock.Lock()
+	defer menuItemsLock.Unlock()
+	menuItems[item.id] = item
+	addOrUpdateMenuItem(item)
+}
+
+func systrayMenuItemSelected(id int32) {
+	menuItemsLock.RLock()
+	item := menuItems[id]
+	menuItemsLock.RUnlock()
+	select {
+	case item.ClickedCh <- struct{}{}:
+	// in case no one waiting for the channel
+	default:
+	}
+}