add TimeZone selection in settings

sysgo/UI/folder_stack.go

@@ -0,0 +1,63 @@
+package UI
+
+import (
+  "sync"
+
+)
+
+type FolderStack struct {
+    lock *sync.Mutex
+    head *element
+    Size int
+    RootPath string
+}
+
+func (stk *FolderStack) Push(data interface{}) {
+    stk.lock.Lock()
+
+    element := new(element)
+    element.data = data
+    temp := stk.head
+    element.next = temp
+    stk.head = element
+    stk.Size++
+
+    stk.lock.Unlock()
+}
+
+func (stk *FolderStack) Pop() interface{} {
+    if stk.head == nil {
+        return nil
+    }
+    stk.lock.Lock()
+    r := stk.head.data
+    stk.head = stk.head.next
+    stk.Size--
+
+    stk.lock.Unlock()
+
+    return r
+}
+
+func (stk *FolderStack) SetRootPath(path string) {
+  stk.RootPath = path
+}
+
+func (stk *FolderStack) Length() int {
+	return stk.Size
+}
+
+func (stk *FolderStack) Last() string {
+  idx := stk.Length() -1
+  if idx < 0 {
+    return stk.RootPath
+  }else {
+    return stk.head.data.(string)
+  }
+}
+
+func NewFolderStack() *FolderStack {
+    stk := new(FolderStack)
+    stk.lock = &sync.Mutex{}
+    return stk
+}