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rui/animationEvents.go

376 lines
12 KiB
Go

package rui
import "strings"
const (
// TransitionRunEvent is the constant for "transition-run-event" property tag.
// The "transition-run-event" is fired when a transition is first created,
// i.e. before any transition delay has begun.
TransitionRunEvent = "transition-run-event"
// TransitionStartEvent is the constant for "transition-end-event" property tag.
// The "transition-start-event" is fired when a transition has actually started,
// i.e., after "delay" has ended.
TransitionStartEvent = "transition-start-event"
// TransitionEndEvent is the constant for "transition-end-event" property tag.
// The "transition-end-event" is fired when a transition has completed.
TransitionEndEvent = "transition-end-event"
// TransitionCancelEvent is the constant for "transition-cancel-event" property tag.
// The "transition-cancel-event" is fired when a transition is cancelled. The transition is cancelled when:
// * A new property transition has begun.
// * The "visibility" property is set to "gone".
// * The transition is stopped before it has run to completion, e.g. by moving the mouse off a hover-transitioning view.
TransitionCancelEvent = "transition-cancel-event"
// AnimationStartEvent is the constant for "animation-start-event" property tag.
// The "animation-start-event" is fired when an animation has started.
// If there is an animation-delay, this event will fire once the delay period has expired.
AnimationStartEvent = "animation-start-event"
// AnimationEndEvent is the constant for "animation-end-event" property tag.
// The "animation-end-event" is fired when aт фnimation has completed.
// If the animation aborts before reaching completion, such as if the element is removed
// or the animation is removed from the element, the "animation-end-event" is not fired.
AnimationEndEvent = "animation-end-event"
// AnimationCancelEvent is the constant for "animation-cancel-event" property tag.
// The "animation-cancel-event" is fired when an animation unexpectedly aborts.
// In other words, any time it stops running without sending the "animation-end-event".
// This might happen when the animation-name is changed such that the animation is removed,
// or when the animating view is hidden. Therefore, either directly or because any of its
// containing views are hidden.
// The event is not supported by all browsers.
AnimationCancelEvent = "animation-cancel-event"
// AnimationIterationEvent is the constant for "animation-iteration-event" property tag.
// The "animation-iteration-event" is fired when an iteration of an animation ends,
// and another one begins. This event does not occur at the same time as the animationend event,
// and therefore does not occur for animations with an "iteration-count" of one.
AnimationIterationEvent = "animation-iteration-event"
)
func valueToAnimationListeners(value interface{}) ([]func(View, string), bool) {
if value == nil {
return nil, true
}
switch value := value.(type) {
case func(View, string):
return []func(View, string){value}, true
case func(string):
fn := func(view View, event string) {
value(event)
}
return []func(View, string){fn}, true
case func(View):
fn := func(view View, event string) {
value(view)
}
return []func(View, string){fn}, true
case func():
fn := func(view View, event string) {
value()
}
return []func(View, string){fn}, true
case []func(View, string):
if len(value) == 0 {
return nil, true
}
for _, fn := range value {
if fn == nil {
return nil, false
}
}
return value, true
case []func(string):
count := len(value)
if count == 0 {
return nil, true
}
listeners := make([]func(View, string), count)
for i, v := range value {
if v == nil {
return nil, false
}
listeners[i] = func(view View, event string) {
v(event)
}
}
return listeners, true
case []func(View):
count := len(value)
if count == 0 {
return nil, true
}
listeners := make([]func(View, string), count)
for i, v := range value {
if v == nil {
return nil, false
}
listeners[i] = func(view View, event string) {
v(view)
}
}
return listeners, true
case []func():
count := len(value)
if count == 0 {
return nil, true
}
listeners := make([]func(View, string), count)
for i, v := range value {
if v == nil {
return nil, false
}
listeners[i] = func(view View, event string) {
v()
}
}
return listeners, true
case []interface{}:
count := len(value)
if count == 0 {
return nil, true
}
listeners := make([]func(View, string), count)
for i, v := range value {
if v == nil {
return nil, false
}
switch v := v.(type) {
case func(View, string):
listeners[i] = v
case func(string):
listeners[i] = func(view View, event string) {
v(event)
}
case func(View):
listeners[i] = func(view View, event string) {
v(view)
}
case func():
listeners[i] = func(view View, event string) {
v()
}
default:
return nil, false
}
}
return listeners, true
}
return nil, false
}
var transitionEvents = map[string]struct{ jsEvent, jsFunc string }{
TransitionRunEvent: {jsEvent: "ontransitionrun", jsFunc: "transitionRunEvent"},
TransitionStartEvent: {jsEvent: "ontransitionstart", jsFunc: "transitionStartEvent"},
TransitionEndEvent: {jsEvent: "ontransitionend", jsFunc: "transitionEndEvent"},
TransitionCancelEvent: {jsEvent: "ontransitioncancel", jsFunc: "transitionCancelEvent"},
}
func (view *viewData) setTransitionListener(tag string, value interface{}) bool {
listeners, ok := valueToAnimationListeners(value)
if !ok {
notCompatibleType(tag, value)
return false
}
if listeners == nil {
view.removeTransitionListener(tag)
} else if js, ok := transitionEvents[tag]; ok {
view.properties[tag] = listeners
if view.created {
updateProperty(view.htmlID(), js.jsEvent, js.jsFunc+"(this, event)", view.Session())
}
} else {
return false
}
return true
}
func (view *viewData) removeTransitionListener(tag string) {
delete(view.properties, tag)
if view.created {
if js, ok := transitionEvents[tag]; ok {
removeProperty(view.htmlID(), js.jsEvent, view.Session())
}
}
}
func getAnimationListeners(view View, subviewID string, tag string) []func(View, string) {
if subviewID != "" {
view = ViewByID(view, subviewID)
}
if view != nil {
if value := view.Get(tag); value != nil {
if result, ok := value.([]func(View, string)); ok {
return result
}
}
}
return []func(View, string){}
}
func transitionEventsHtml(view View, buffer *strings.Builder) {
for tag, js := range transitionEvents {
if value := view.getRaw(tag); value != nil {
if listeners, ok := value.([]func(View, string)); ok && len(listeners) > 0 {
buffer.WriteString(js.jsEvent + `="` + js.jsFunc + `(this, event)" `)
}
}
}
}
func (view *viewData) handleTransitionEvents(tag string, data DataObject) {
if property, ok := data.PropertyValue("property"); ok {
if tag == TransitionEndEvent || tag == TransitionCancelEvent {
if animation, ok := view.singleTransition[property]; ok {
delete(view.singleTransition, property)
if animation != nil {
view.transitions[property] = animation
} else {
delete(view.transitions, property)
}
view.updateTransitionCSS()
}
}
for _, listener := range getAnimationListeners(view, "", tag) {
listener(view, property)
}
}
}
var animationEvents = map[string]struct{ jsEvent, jsFunc string }{
AnimationStartEvent: {jsEvent: "onanimationstart", jsFunc: "animationStartEvent"},
AnimationEndEvent: {jsEvent: "onanimationend", jsFunc: "animationEndEvent"},
AnimationIterationEvent: {jsEvent: "onanimationiteration", jsFunc: "animationIterationEvent"},
AnimationCancelEvent: {jsEvent: "onanimationcancel", jsFunc: "animationCancelEvent"},
}
func (view *viewData) setAnimationListener(tag string, value interface{}) bool {
listeners, ok := valueToAnimationListeners(value)
if !ok {
notCompatibleType(tag, value)
return false
}
if listeners == nil {
view.removeAnimationListener(tag)
} else if js, ok := animationEvents[tag]; ok {
view.properties[tag] = listeners
if view.created {
updateProperty(view.htmlID(), js.jsEvent, js.jsFunc+"(this, event)", view.Session())
}
} else {
return false
}
return true
}
func (view *viewData) removeAnimationListener(tag string) {
delete(view.properties, tag)
if view.created {
if js, ok := animationEvents[tag]; ok {
removeProperty(view.htmlID(), js.jsEvent, view.Session())
}
}
}
func animationEventsHtml(view View, buffer *strings.Builder) {
for tag, js := range animationEvents {
if value := view.getRaw(tag); value != nil {
if listeners, ok := value.([]func(View)); ok && len(listeners) > 0 {
buffer.WriteString(js.jsEvent + `="` + js.jsFunc + `(this, event)" `)
}
}
}
}
func (view *viewData) handleAnimationEvents(tag string, data DataObject) {
if listeners := getAnimationListeners(view, "", tag); len(listeners) > 0 {
id := ""
if name, ok := data.PropertyValue("name"); ok {
for _, animation := range GetAnimation(view, "") {
if name == animation.animationName() {
id, _ = stringProperty(animation, ID, view.Session())
}
}
}
for _, listener := range listeners {
listener(view, id)
}
}
}
// GetTransitionRunListeners returns the "transition-run-event" listener list.
// If there are no listeners then the empty list is returned.
// If the second argument (subviewID) is "" then a value from the first argument (view) is returned.
func GetTransitionRunListeners(view View, subviewID string) []func(View, string) {
return getAnimationListeners(view, subviewID, TransitionRunEvent)
}
// GetTransitionStartListeners returns the "transition-start-event" listener list.
// If there are no listeners then the empty list is returned.
// If the second argument (subviewID) is "" then a value from the first argument (view) is returned.
func GetTransitionStartListeners(view View, subviewID string) []func(View, string) {
return getAnimationListeners(view, subviewID, TransitionStartEvent)
}
// GetTransitionEndListeners returns the "transition-end-event" listener list.
// If there are no listeners then the empty list is returned.
// If the second argument (subviewID) is "" then a value from the first argument (view) is returned.
func GetTransitionEndListeners(view View, subviewID string) []func(View, string) {
return getAnimationListeners(view, subviewID, TransitionEndEvent)
}
// GetTransitionCancelListeners returns the "transition-cancel-event" listener list.
// If there are no listeners then the empty list is returned.
// If the second argument (subviewID) is "" then a value from the first argument (view) is returned.
func GetTransitionCancelListeners(view View, subviewID string) []func(View, string) {
return getAnimationListeners(view, subviewID, TransitionCancelEvent)
}
// GetAnimationStartListeners returns the "animation-start-event" listener list.
// If there are no listeners then the empty list is returned.
// If the second argument (subviewID) is "" then a value from the first argument (view) is returned.
func GetAnimationStartListeners(view View, subviewID string) []func(View, string) {
return getAnimationListeners(view, subviewID, AnimationStartEvent)
}
// GetAnimationEndListeners returns the "animation-end-event" listener list.
// If there are no listeners then the empty list is returned.
// If the second argument (subviewID) is "" then a value from the first argument (view) is returned.
func GetAnimationEndListeners(view View, subviewID string) []func(View, string) {
return getAnimationListeners(view, subviewID, AnimationEndEvent)
}
// GetAnimationCancelListeners returns the "animation-cancel-event" listener list.
// If there are no listeners then the empty list is returned.
// If the second argument (subviewID) is "" then a value from the first argument (view) is returned.
func GetAnimationCancelListeners(view View, subviewID string) []func(View, string) {
return getAnimationListeners(view, subviewID, AnimationCancelEvent)
}
// GetAnimationIterationListeners returns the "animation-iteration-event" listener list.
// If there are no listeners then the empty list is returned.
// If the second argument (subviewID) is "" then a value from the first argument (view) is returned.
func GetAnimationIterationListeners(view View, subviewID string) []func(View, string) {
return getAnimationListeners(view, subviewID, AnimationIterationEvent)
}