/
events.go
195 lines (176 loc) · 3.53 KB
/
events.go
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package dom
import (
"github.com/psilva261/sparkle/js"
"github.com/psilva261/sparklefs/logger"
"strings"
)
type Event struct {
Type string
Consumed bool
DefaultPrevented bool
Phase int
Bubbles bool
CancelBubble bool
Cancelable bool
IsTrusted bool
propagationStopped bool
CurrentTarget *Element
Target *Element
SrcElement *Element
}
const (
EvPhNone = iota
)
func NewEvent(t string, opts map[string]any) (o *js.Object) {
e := &Event{
Type: t,
}
if yes, ok := opts["bubbles"]; ok {
e.Bubbles, _ = yes.(bool)
}
return e.Obj()
}
func (e *Event) InitEvent(t string, opts ...any) {
var bubbles, cancelable bool
if len(opts) >= 1 {
bubbles, _ = opts[0].(bool)
}
if len(opts) >= 2 {
cancelable, _ = opts[1].(bool)
}
if e.Consumed {
log.Errorf("init on consumed event")
return
}
e.Type = strings.ToLower(t)
e.Bubbles = bubbles
e.Cancelable = cancelable
e.DefaultPrevented = false
e.propagationStopped = false
}
func (e *Event) PreventDefault() {
if e.Cancelable {
e.DefaultPrevented = true
}
}
func (e *Event) ReturnValue() bool {
return !e.DefaultPrevented
}
func (e *Event) StopPropagation() {
e.propagationStopped = true
}
func (e *Event) StopImmediatePropagation() {
e.propagationStopped = true
}
func (e *Event) Getters() map[string]bool {
return map[string]bool{
"length": true,
"returnValue": true,
}
}
func (e *Event) Props() map[string]bool {
return map[string]bool{
"bubbles": true,
"cancelBubble": true,
"cancelable": true,
"eventPhase": true,
"isTrusted": true,
"defaultPrevented": true,
"type": true,
"currentTarget": true,
//"target": true,
"srcElement": true,
}
}
func (e *Event) Obj() (o *js.Object) {
o, ok := evObjRefs[e]
if ok {
return
}
o = vm.NewDynamicObject(e)
evObjRefs[e] = o
return
}
func (e *Event) Get(key string) js.Value {
if key == "target" { // TODO: reflect dyn obj. also fails here
if e.Target == nil {
return js.Null()
}
return e.Target.Obj()
}
if key == "currentTarget" { // TODO: reflect dyn obj. also fails here
if e.CurrentTarget == nil {
return js.Null()
}
return e.CurrentTarget.Obj()
}
if vs, ok := evVars[e]; ok {
if v, ok := vs[key]; ok {
return v
}
}
if res, ok := GetCall(e, key); ok {
return res
}
return js.Undefined()
}
func (e *Event) Set(key string, desc js.PropertyDescriptor) bool {
val := desc.Value
switch key {
case "cancelBubble":
e.CancelBubble = val.ToBoolean()
case "returnValue":
if e.Cancelable {
e.DefaultPrevented = !val.ToBoolean()
}
case "target":
// r/o
/*log.Infof("event set target to %v", val)
e.Target = val.Export().(*Element)*/
default:
if _, ok := evVars[e]; !ok {
evVars[e] = make(map[string]js.Value)
}
evVars[e][key] = val
}
return true
}
func (e *Event) Has(key string) bool {
if vs, ok := evVars[e]; ok {
if _, ok := vs[key]; ok {
return true
}
}
return HasCall(e, key)
}
func (e *Event) Delete(key string) (ok bool) {
if vs, ok := evVars[e]; ok {
if _, ok := vs[key]; ok {
delete(vs, key)
return true
}
}
return false
}
func (e *Event) Keys() []string {
ks := Calls(e)
for k := range evVars[e] {
ks = append(ks, k)
}
return ks
}
type MouseEvent struct {
Event
}
func NewMouseEvent(t string, opts map[string]any) (o *js.Object) {
e := Event{
Type: t,
}
if v, ok := opts["cancelable"]; ok {
e.Cancelable = v.(bool)
}
o = vm.NewDynamicObject(&MouseEvent{
Event: e,
})
return
}