/
Shadow.go
88 lines (60 loc) · 1.52 KB
/
Shadow.go
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package bl
var g_shadowNodeById map[string] *ShadowNode
func init() {
g_shadowNodeById = make(map[string] *ShadowNode)
}
func EnsureShadow() *ShadowNode {
shadow, ok := g_shadowNodeById[Current_Node.Id]
if !ok {
shadow = newShadowNode(Current_Node)
g_shadowNodeById[Current_Node.Id] = shadow
}
shadow.BackingNode = Current_Node
return shadow
}
func EnsureShadowById(id string) *ShadowNode {
shadow, ok := g_shadowNodeById[id]
node := GetNodeById(id)
if !ok {
shadow = newShadowNode(node)
g_shadowNodeById[id] = shadow
}
shadow.BackingNode = node
return shadow
}
func EnsureShadowByNode(node *Node) *ShadowNode {
shadow, ok := g_shadowNodeById[node.Id]
if !ok {
shadow = newShadowNode(node)
g_shadowNodeById[node.Id] = shadow
}
shadow.BackingNode = node
return shadow
}
func HasShadowById(id string) (*ShadowNode, bool) {
shadow, ok := g_shadowNodeById[id]
return shadow, ok
}
func syncFromShadow_Position_and_Dimension(node *Node) {
validateNodeId(node)
shadow, ok := g_shadowNodeById[node.Id]
if ok {
shadow.BackingNode.left = shadow.Left
shadow.BackingNode.top = shadow.Top
shadow.BackingNode.width = shadow.Width
shadow.BackingNode.height = shadow.Height
}
for e := node.Kids.Front(); e != nil; e = e.Next() {
kid := e.Value.(*Node)
syncFromShadow_Position_and_Dimension(kid)
}
}
func validateNodeId(node *Node) {
if node.Id == "" {
parentId := "No Parent"
if node.Parent != nil {
parentId = node.Parent.Id
}
panic( "Node MUST have ID, parent was " + parentId )
}
}