forked from mbk-lab/rui_orig
513 lines
12 KiB
Go
513 lines
12 KiB
Go
package rui
|
|
|
|
import "strings"
|
|
|
|
const (
|
|
// KeyDown is the constant for "key-down-event" property tag.
|
|
// The "key-down-event" event is fired when a key is pressed.
|
|
// The main listener format:
|
|
// func(View, KeyEvent).
|
|
// The additional listener formats:
|
|
// func(KeyEvent), func(View), and func().
|
|
KeyDownEvent = "key-down-event"
|
|
|
|
// KeyPp is the constant for "key-up-event" property tag.
|
|
// The "key-up-event" event is fired when a key is released.
|
|
// The main listener format:
|
|
// func(View, KeyEvent).
|
|
// The additional listener formats:
|
|
// func(KeyEvent), func(View), and func().
|
|
KeyUpEvent = "key-up-event"
|
|
)
|
|
|
|
type KeyEvent struct {
|
|
// TimeStamp is the time at which the event was created (in milliseconds).
|
|
// This value is time since epoch—but in reality, browsers' definitions vary.
|
|
TimeStamp uint64
|
|
|
|
// Key is the key value of the key represented by the event. If the value has a printed representation,
|
|
// this attribute's value is the same as the char property. Otherwise, it's one of the key value strings
|
|
// specified in Key values. If the key can't be identified, its value is the string "Unidentified".
|
|
Key string
|
|
|
|
// Code holds a string that identifies the physical key being pressed. The value is not affected
|
|
// by the current keyboard layout or modifier state, so a particular key will always return the same value.
|
|
Code string
|
|
|
|
// Repeat == true if a key has been depressed long enough to trigger key repetition, otherwise false.
|
|
Repeat bool
|
|
|
|
// CtrlKey == true if the control key was down when the event was fired. false otherwise.
|
|
CtrlKey bool
|
|
|
|
// ShiftKey == true if the shift key was down when the event was fired. false otherwise.
|
|
ShiftKey bool
|
|
|
|
// AltKey == true if the alt key was down when the event was fired. false otherwise.
|
|
AltKey bool
|
|
|
|
// MetaKey == true if the meta key was down when the event was fired. false otherwise.
|
|
MetaKey bool
|
|
}
|
|
|
|
func (event *KeyEvent) init(data DataObject) {
|
|
getBool := func(tag string) bool {
|
|
if value, ok := data.PropertyValue(tag); ok && value == "1" {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
event.Key, _ = data.PropertyValue("key")
|
|
event.Code, _ = data.PropertyValue("code")
|
|
event.TimeStamp = getTimeStamp(data)
|
|
event.Repeat = getBool("repeat")
|
|
event.CtrlKey = getBool("ctrlKey")
|
|
event.ShiftKey = getBool("shiftKey")
|
|
event.AltKey = getBool("altKey")
|
|
event.MetaKey = getBool("metaKey")
|
|
}
|
|
|
|
func valueToEventListeners[V View, E any](value any) ([]func(V, E), bool) {
|
|
if value == nil {
|
|
return nil, true
|
|
}
|
|
|
|
switch value := value.(type) {
|
|
case func(V, E):
|
|
return []func(V, E){value}, true
|
|
|
|
case func(E):
|
|
fn := func(_ V, event E) {
|
|
value(event)
|
|
}
|
|
return []func(V, E){fn}, true
|
|
|
|
case func(V):
|
|
fn := func(view V, _ E) {
|
|
value(view)
|
|
}
|
|
return []func(V, E){fn}, true
|
|
|
|
case func():
|
|
fn := func(V, E) {
|
|
value()
|
|
}
|
|
return []func(V, E){fn}, true
|
|
|
|
case []func(V, E):
|
|
if len(value) == 0 {
|
|
return nil, true
|
|
}
|
|
for _, fn := range value {
|
|
if fn == nil {
|
|
return nil, false
|
|
}
|
|
}
|
|
return value, true
|
|
|
|
case []func(E):
|
|
count := len(value)
|
|
if count == 0 {
|
|
return nil, true
|
|
}
|
|
listeners := make([]func(V, E), count)
|
|
for i, v := range value {
|
|
if v == nil {
|
|
return nil, false
|
|
}
|
|
listeners[i] = func(_ V, event E) {
|
|
v(event)
|
|
}
|
|
}
|
|
return listeners, true
|
|
|
|
case []func(V):
|
|
count := len(value)
|
|
if count == 0 {
|
|
return nil, true
|
|
}
|
|
listeners := make([]func(V, E), count)
|
|
for i, v := range value {
|
|
if v == nil {
|
|
return nil, false
|
|
}
|
|
listeners[i] = func(view V, _ E) {
|
|
v(view)
|
|
}
|
|
}
|
|
return listeners, true
|
|
|
|
case []func():
|
|
count := len(value)
|
|
if count == 0 {
|
|
return nil, true
|
|
}
|
|
listeners := make([]func(V, E), count)
|
|
for i, v := range value {
|
|
if v == nil {
|
|
return nil, false
|
|
}
|
|
listeners[i] = func(V, E) {
|
|
v()
|
|
}
|
|
}
|
|
return listeners, true
|
|
|
|
case []any:
|
|
count := len(value)
|
|
if count == 0 {
|
|
return nil, true
|
|
}
|
|
listeners := make([]func(V, E), count)
|
|
for i, v := range value {
|
|
if v == nil {
|
|
return nil, false
|
|
}
|
|
switch v := v.(type) {
|
|
case func(V, E):
|
|
listeners[i] = v
|
|
|
|
case func(E):
|
|
listeners[i] = func(_ V, event E) {
|
|
v(event)
|
|
}
|
|
|
|
case func(V):
|
|
listeners[i] = func(view V, _ E) {
|
|
v(view)
|
|
}
|
|
|
|
case func():
|
|
listeners[i] = func(V, E) {
|
|
v()
|
|
}
|
|
|
|
default:
|
|
return nil, false
|
|
}
|
|
}
|
|
return listeners, true
|
|
}
|
|
|
|
return nil, false
|
|
}
|
|
|
|
func valueToEventWithOldListeners[V View, E any](value any) ([]func(V, E, E), bool) {
|
|
if value == nil {
|
|
return nil, true
|
|
}
|
|
|
|
switch value := value.(type) {
|
|
case func(V, E, E):
|
|
return []func(V, E, E){value}, true
|
|
|
|
case func(V, E):
|
|
fn := func(v V, val, _ E) {
|
|
value(v, val)
|
|
}
|
|
return []func(V, E, E){fn}, true
|
|
|
|
case func(E, E):
|
|
fn := func(_ V, val, old E) {
|
|
value(val, old)
|
|
}
|
|
return []func(V, E, E){fn}, true
|
|
|
|
case func(E):
|
|
fn := func(_ V, val, _ E) {
|
|
value(val)
|
|
}
|
|
return []func(V, E, E){fn}, true
|
|
|
|
case func(V):
|
|
fn := func(v V, _, _ E) {
|
|
value(v)
|
|
}
|
|
return []func(V, E, E){fn}, true
|
|
|
|
case func():
|
|
fn := func(V, E, E) {
|
|
value()
|
|
}
|
|
return []func(V, E, E){fn}, true
|
|
|
|
case []func(V, E, E):
|
|
if len(value) == 0 {
|
|
return nil, true
|
|
}
|
|
for _, fn := range value {
|
|
if fn == nil {
|
|
return nil, false
|
|
}
|
|
}
|
|
return value, true
|
|
|
|
case []func(V, E):
|
|
count := len(value)
|
|
if count == 0 {
|
|
return nil, true
|
|
}
|
|
listeners := make([]func(V, E, E), count)
|
|
for i, fn := range value {
|
|
if fn == nil {
|
|
return nil, false
|
|
}
|
|
listeners[i] = func(view V, val, _ E) {
|
|
fn(view, val)
|
|
}
|
|
}
|
|
return listeners, true
|
|
|
|
case []func(E):
|
|
count := len(value)
|
|
if count == 0 {
|
|
return nil, true
|
|
}
|
|
listeners := make([]func(V, E, E), count)
|
|
for i, fn := range value {
|
|
if fn == nil {
|
|
return nil, false
|
|
}
|
|
listeners[i] = func(_ V, val, _ E) {
|
|
fn(val)
|
|
}
|
|
}
|
|
return listeners, true
|
|
|
|
case []func(E, E):
|
|
count := len(value)
|
|
if count == 0 {
|
|
return nil, true
|
|
}
|
|
listeners := make([]func(V, E, E), count)
|
|
for i, fn := range value {
|
|
if fn == nil {
|
|
return nil, false
|
|
}
|
|
listeners[i] = func(_ V, val, old E) {
|
|
fn(val, old)
|
|
}
|
|
}
|
|
return listeners, true
|
|
|
|
case []func(V):
|
|
count := len(value)
|
|
if count == 0 {
|
|
return nil, true
|
|
}
|
|
listeners := make([]func(V, E, E), count)
|
|
for i, fn := range value {
|
|
if fn == nil {
|
|
return nil, false
|
|
}
|
|
listeners[i] = func(view V, _, _ E) {
|
|
fn(view)
|
|
}
|
|
}
|
|
return listeners, true
|
|
|
|
case []func():
|
|
count := len(value)
|
|
if count == 0 {
|
|
return nil, true
|
|
}
|
|
listeners := make([]func(V, E, E), count)
|
|
for i, fn := range value {
|
|
if fn == nil {
|
|
return nil, false
|
|
}
|
|
listeners[i] = func(V, E, E) {
|
|
fn()
|
|
}
|
|
}
|
|
return listeners, true
|
|
|
|
case []any:
|
|
count := len(value)
|
|
if count == 0 {
|
|
return nil, true
|
|
}
|
|
listeners := make([]func(V, E, E), count)
|
|
for i, v := range value {
|
|
if v == nil {
|
|
return nil, false
|
|
}
|
|
switch fn := v.(type) {
|
|
case func(V, E, E):
|
|
listeners[i] = fn
|
|
|
|
case func(V, E):
|
|
listeners[i] = func(view V, val, _ E) {
|
|
fn(view, val)
|
|
}
|
|
|
|
case func(E, E):
|
|
listeners[i] = func(_ V, val, old E) {
|
|
fn(val, old)
|
|
}
|
|
|
|
case func(E):
|
|
listeners[i] = func(_ V, val, _ E) {
|
|
fn(val)
|
|
}
|
|
|
|
case func(V):
|
|
listeners[i] = func(view V, _, _ E) {
|
|
fn(view)
|
|
}
|
|
|
|
case func():
|
|
listeners[i] = func(V, E, E) {
|
|
fn()
|
|
}
|
|
|
|
default:
|
|
return nil, false
|
|
}
|
|
}
|
|
return listeners, true
|
|
}
|
|
|
|
return nil, false
|
|
}
|
|
|
|
/*
|
|
var keyEvents = map[string]struct{ jsEvent, jsFunc string }{
|
|
KeyDownEvent: {jsEvent: "onkeydown", jsFunc: "keyDownEvent"},
|
|
KeyUpEvent: {jsEvent: "onkeyup", jsFunc: "keyUpEvent"},
|
|
}
|
|
*/
|
|
func (view *viewData) setKeyListener(tag string, value any) bool {
|
|
listeners, ok := valueToEventListeners[View, KeyEvent](value)
|
|
if !ok {
|
|
notCompatibleType(tag, value)
|
|
return false
|
|
}
|
|
|
|
if listeners == nil {
|
|
view.removeKeyListener(tag)
|
|
} else {
|
|
switch tag {
|
|
case KeyDownEvent:
|
|
if view.created {
|
|
view.session.updateProperty(view.htmlID(), "onkeydown", "keyDownEvent(this, event)")
|
|
}
|
|
|
|
case KeyUpEvent:
|
|
if view.created {
|
|
view.session.updateProperty(view.htmlID(), "onkeyup", "keyUpEvent(this, event)")
|
|
}
|
|
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
func (view *viewData) removeKeyListener(tag string) {
|
|
delete(view.properties, tag)
|
|
if view.created {
|
|
switch tag {
|
|
case KeyDownEvent:
|
|
if !view.Focusable() {
|
|
view.session.removeProperty(view.htmlID(), "onkeydown")
|
|
}
|
|
|
|
case KeyUpEvent:
|
|
view.session.removeProperty(view.htmlID(), "onkeyup")
|
|
}
|
|
}
|
|
}
|
|
|
|
func getEventWithOldListeners[V View, E any](view View, subviewID []string, tag string) []func(V, E, E) {
|
|
if len(subviewID) > 0 && subviewID[0] != "" {
|
|
view = ViewByID(view, subviewID[0])
|
|
}
|
|
if view != nil {
|
|
if value := view.Get(tag); value != nil {
|
|
if result, ok := value.([]func(V, E, E)); ok {
|
|
return result
|
|
}
|
|
}
|
|
}
|
|
return []func(V, E, E){}
|
|
}
|
|
func getEventListeners[V View, E any](view View, subviewID []string, tag string) []func(V, E) {
|
|
if len(subviewID) > 0 && subviewID[0] != "" {
|
|
view = ViewByID(view, subviewID[0])
|
|
}
|
|
if view != nil {
|
|
if value := view.Get(tag); value != nil {
|
|
if result, ok := value.([]func(V, E)); ok {
|
|
return result
|
|
}
|
|
}
|
|
}
|
|
return []func(V, E){}
|
|
}
|
|
|
|
func keyEventsHtml(view View, buffer *strings.Builder) {
|
|
if len(getEventListeners[View, KeyEvent](view, nil, KeyDownEvent)) > 0 {
|
|
buffer.WriteString(`onkeydown="keyDownEvent(this, event)" `)
|
|
} else if view.Focusable() {
|
|
if len(getEventListeners[View, MouseEvent](view, nil, ClickEvent)) > 0 {
|
|
buffer.WriteString(`onkeydown="keyDownEvent(this, event)" `)
|
|
}
|
|
}
|
|
|
|
if listeners := getEventListeners[View, KeyEvent](view, nil, KeyUpEvent); len(listeners) > 0 {
|
|
buffer.WriteString(`onkeyup="keyUpEvent(this, event)" `)
|
|
}
|
|
}
|
|
|
|
func handleKeyEvents(view View, tag string, data DataObject) {
|
|
var event KeyEvent
|
|
event.init(data)
|
|
listeners := getEventListeners[View, KeyEvent](view, nil, tag)
|
|
|
|
if len(listeners) > 0 {
|
|
for _, listener := range listeners {
|
|
listener(view, event)
|
|
}
|
|
return
|
|
}
|
|
|
|
if tag == KeyDownEvent && view.Focusable() && (event.Key == " " || event.Key == "Enter") && !IsDisabled(view) {
|
|
if listeners := getEventListeners[View, MouseEvent](view, nil, ClickEvent); len(listeners) > 0 {
|
|
clickEvent := MouseEvent{
|
|
TimeStamp: event.TimeStamp,
|
|
Button: PrimaryMouseButton,
|
|
Buttons: PrimaryMouseMask,
|
|
CtrlKey: event.CtrlKey,
|
|
AltKey: event.AltKey,
|
|
ShiftKey: event.ShiftKey,
|
|
MetaKey: event.MetaKey,
|
|
ClientX: view.Frame().Width / 2,
|
|
ClientY: view.Frame().Height / 2,
|
|
X: view.Frame().Width / 2,
|
|
Y: view.Frame().Height / 2,
|
|
ScreenX: view.Frame().Left + view.Frame().Width/2,
|
|
ScreenY: view.Frame().Top + view.Frame().Height/2,
|
|
}
|
|
for _, listener := range listeners {
|
|
listener(view, clickEvent)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// GetKeyDownListeners returns the "key-down-event" listener list. If there are no listeners then the empty list is returned.
|
|
// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
|
|
func GetKeyDownListeners(view View, subviewID ...string) []func(View, KeyEvent) {
|
|
return getEventListeners[View, KeyEvent](view, subviewID, KeyDownEvent)
|
|
}
|
|
|
|
// GetKeyUpListeners returns the "key-up-event" listener list. If there are no listeners then the empty list is returned.
|
|
// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
|
|
func GetKeyUpListeners(view View, subviewID ...string) []func(View, KeyEvent) {
|
|
return getEventListeners[View, KeyEvent](view, subviewID, KeyUpEvent)
|
|
}
|