Implement and test input elements

demo/playground/src/jvmMain/kotlin/controlVision.kt

@@ -0,0 +1,59 @@
+package space.kscience.visionforge.examples
+
+import kotlinx.html.p
+import space.kscience.visionforge.VisionControlEvent
+import space.kscience.visionforge.html.*
+import space.kscience.visionforge.onClick
+
+
+fun main() = serve {
+
+    val events = ArrayDeque<VisionControlEvent>(10)
+
+    val html = VisionOfPlainHtml()
+
+    fun pushEvent(event: VisionControlEvent) {
+        events.addFirst(event)
+        if (events.size >= 10) {
+            events.removeLast()
+        }
+        html.content {
+            events.forEach { event ->
+                p {
+                    text(event.toString())
+                }
+            }
+        }
+    }
+
+    vision {
+        htmlCheckBox {
+            checked = true
+            onValueChange(context) {
+                pushEvent(this)
+            }
+        }
+    }
+
+    vision {
+        htmlRangeField(1, 10) {
+            numberValue = 4
+            onValueChange(context) {
+                pushEvent(this)
+            }
+        }
+    }
+
+
+    vision {
+        button("Click me"){
+            onClick(context){
+                pushEvent(this)
+            }
+        }
+    }
+
+
+
+    vision(html)
+}

visionforge-core/src/commonMain/kotlin/space/kscience/visionforge/ControlVision.kt

@@ -8,14 +8,13 @@ import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
-import space.kscience.dataforge.meta.Meta
-import space.kscience.dataforge.meta.MetaRepr
-import space.kscience.dataforge.meta.MutableMeta
-import space.kscience.dataforge.meta.Value
+import space.kscience.dataforge.meta.*
+import space.kscience.dataforge.names.Name
+import space.kscience.dataforge.names.parseAsName
 
 @Serializable
 @SerialName("control")
-public abstract class VisionControlEvent : VisionEvent, MetaRepr {
+public sealed class VisionControlEvent : VisionEvent, MetaRepr {
     public abstract val meta: Meta
 
     override fun toMeta(): Meta = meta
@@ -24,30 +23,41 @@ public abstract class VisionControlEvent : VisionEvent, MetaRepr {
 public interface ControlVision : Vision {
     public val controlEventFlow: SharedFlow<VisionControlEvent>
 
-    public fun dispatchControlEvent(event: VisionControlEvent)
+    public suspend fun dispatchControlEvent(event: VisionControlEvent)
 
-    override fun receiveEvent(event: VisionEvent) {
+    override suspend fun receiveEvent(event: VisionEvent) {
         if (event is VisionControlEvent) {
             dispatchControlEvent(event)
         } else super.receiveEvent(event)
     }
 }
 
+
 /**
  * @param payload The optional payload associated with the click event.
  */
 @Serializable
 @SerialName("control.click")
-public class VisionClickEvent(public val payload: Meta = Meta.EMPTY) : VisionControlEvent() {
-    override val meta: Meta get() = Meta { ::payload.name put payload }
+public class VisionClickEvent(override val meta: Meta) : VisionControlEvent() {
+    public val payload: Meta? by meta.node()
+    public val name: Name? get() = meta["name"].string?.parseAsName()
+
+    override fun toString(): String  = meta.toString()
 }
 
+public fun VisionClickEvent(payload: Meta = Meta.EMPTY, name: Name? = null): VisionClickEvent = VisionClickEvent(
+    Meta {
+        VisionClickEvent::payload.name put payload
+        VisionClickEvent::name.name put name.toString()
+    }
+)
+
 
 public interface ClickControl : ControlVision {
     /**
      * Create and dispatch a click event
      */
-    public fun click(builder: MutableMeta.() -> Unit = {}) {
+    public suspend fun click(builder: MutableMeta.() -> Unit = {}) {
         dispatchControlEvent(VisionClickEvent(Meta(builder)))
     }
 }
@@ -64,7 +74,18 @@ public fun ClickControl.onClick(scope: CoroutineScope, block: suspend VisionClic
 public class VisionValueChangeEvent(override val meta: Meta) : VisionControlEvent() {
 
     public val value: Value? get() = meta.value
+
+    /**
+     * The name of a control that fired the event
+     */
+    public val name: Name? get() = meta["name"]?.string?.parseAsName()
+
+    override fun toString(): String = meta.toString()
 }
 
-public fun VisionValueChangeEvent(value: Value?): VisionValueChangeEvent =
-    VisionValueChangeEvent(Meta { this.value = value })
+public fun VisionValueChangeEvent(value: Value?, name: Name? = null): VisionValueChangeEvent = VisionValueChangeEvent(
+    Meta {
+        this.value = value
+        name?.let { set("name", it.toString()) }
+    }
+)

visionforge-core/src/commonMain/kotlin/space/kscience/visionforge/Vision.kt

@@ -50,7 +50,7 @@ public interface Vision : Described {
     /**
      * Receive and process a generic [VisionEvent].
      */
-    public fun receiveEvent(event: VisionEvent) {
+    public suspend fun receiveEvent(event: VisionEvent) {
         if(event is VisionChange) update(event)
         else manager?.logger?.warn { "Undispatched event: $event" }
     }

visionforge-core/src/commonMain/kotlin/space/kscience/visionforge/VisionClient.kt

@@ -1,9 +1,7 @@
 package space.kscience.visionforge
 
-import kotlinx.coroutines.launch
 import space.kscience.dataforge.context.Plugin
 import space.kscience.dataforge.meta.Meta
-import space.kscience.dataforge.meta.MetaRepr
 import space.kscience.dataforge.names.Name
 import space.kscience.dataforge.names.parseAsName
 
@@ -33,9 +31,3 @@ public fun VisionClient.notifyPropertyChanged(visionName: Name, propertyName: St
 public fun VisionClient.notifyPropertyChanged(visionName: Name, propertyName: String, item: Boolean) {
     notifyPropertyChanged(visionName, propertyName.parseAsName(true), Meta(item))
 }
-
-public fun VisionClient.sendMetaEvent(targetName: Name, payload: MetaRepr): Unit {
-    context.launch {
-        sendEvent(targetName, VisionMetaEvent(payload.toMeta()))
-    }
-}

visionforge-core/src/commonMain/kotlin/space/kscience/visionforge/VisionManager.kt

@@ -69,12 +69,14 @@ public class VisionManager(meta: Meta) : AbstractPlugin(meta), MutableVisionCont
                 defaultDeserializer { SimpleVisionGroup.serializer() }
                 subclass(NullVision.serializer())
                 subclass(SimpleVisionGroup.serializer())
+                subclass(VisionOfPlainHtml.serializer())
                 subclass(VisionOfHtmlInput.serializer())
                 subclass(VisionOfNumberField.serializer())
                 subclass(VisionOfTextField.serializer())
                 subclass(VisionOfCheckbox.serializer())
                 subclass(VisionOfRangeField.serializer())
                 subclass(VisionOfHtmlForm.serializer())
+                subclass(VisionOfHtmlButton.serializer())
             }
         }
 

visionforge-core/src/commonMain/kotlin/space/kscience/visionforge/html/VisionOfHtml.kt

@@ -1,9 +1,11 @@
 package space.kscience.visionforge.html
 
-import kotlinx.coroutines.flow.MutableSharedFlow
-import kotlinx.coroutines.flow.SharedFlow
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.flow.*
+import kotlinx.html.DIV
 import kotlinx.html.InputType
-import kotlinx.html.TagConsumer
+import kotlinx.html.div
 import kotlinx.html.stream.createHTML
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
@@ -27,8 +29,10 @@ public class VisionOfPlainHtml : VisionOfHtml() {
     public var content: String? by properties.string()
 }
 
-public inline fun VisionOfPlainHtml.content(block: TagConsumer<*>.() -> Unit) {
-    content = createHTML().apply(block).finalize()
+public fun VisionOfPlainHtml.content(block: DIV.() -> Unit) {
+    content = createHTML().apply {
+        div(block = block)
+    }.finalize()
 }
 
 @Suppress("UnusedReceiverParameter")
@@ -54,15 +58,7 @@ public enum class InputFeedbackMode {
     NONE
 }
 
-@Serializable
-@SerialName("html.input")
-public open class VisionOfHtmlInput(
-    public val inputType: String,
-    public val feedbackMode: InputFeedbackMode = InputFeedbackMode.ONCHANGE,
-) : VisionOfHtml(), ControlVision {
-    public var value: Value? by properties.value()
-    public var disabled: Boolean by properties.boolean { false }
-    public var fieldName: String? by properties.string()
+public abstract class VisionOfHtmlControl: VisionOfHtml(), ControlVision{
 
     @Transient
     private val mutableControlEventFlow = MutableSharedFlow<VisionControlEvent>()
@@ -70,14 +66,32 @@ public open class VisionOfHtmlInput(
     override val controlEventFlow: SharedFlow<VisionControlEvent>
         get() = mutableControlEventFlow
 
-    override fun dispatchControlEvent(event: VisionControlEvent) {
-        if(event is VisionValueChangeEvent){
-            this.value = event.value
-        }
-        mutableControlEventFlow.tryEmit(event)
+    override suspend fun dispatchControlEvent(event: VisionControlEvent) {
+        mutableControlEventFlow.emit(event)
     }
 }
 
+
+@Serializable
+@SerialName("html.input")
+public open class VisionOfHtmlInput(
+    public val inputType: String,
+    public val feedbackMode: InputFeedbackMode = InputFeedbackMode.ONCHANGE,
+) : VisionOfHtmlControl() {
+    public var value: Value? by properties.value()
+    public var disabled: Boolean by properties.boolean { false }
+    public var fieldName: String? by properties.string()
+
+}
+
+/**
+ * Trigger [callback] on each value change
+ */
+public fun VisionOfHtmlInput.onValueChange(
+    scope: CoroutineScope = manager?.context ?: error("Coroutine context is not resolved for $this"),
+    callback: suspend VisionValueChangeEvent.() -> Unit,
+): Job = controlEventFlow.filterIsInstance<VisionValueChangeEvent>().onEach(callback).launchIn(scope)
+
 @Suppress("UnusedReceiverParameter")
 public inline fun VisionOutput.htmlInput(
     inputType: String,
@@ -110,7 +124,7 @@ public inline fun VisionOutput.htmlCheckBox(
 @Serializable
 @SerialName("html.number")
 public class VisionOfNumberField : VisionOfHtmlInput(InputType.number.realValue) {
-    public var number: Number? by properties.number(key = VisionOfHtmlInput::value.name.asName())
+    public var numberValue: Number? by properties.number(key = VisionOfHtmlInput::value.name.asName())
 }
 
 @Suppress("UnusedReceiverParameter")
@@ -125,14 +139,14 @@ public class VisionOfRangeField(
     public val max: Double,
     public val step: Double = 1.0,
 ) : VisionOfHtmlInput(InputType.range.realValue) {
-    public var number: Number? by properties.number(key = VisionOfHtmlInput::value.name.asName())
+    public var numberValue: Number? by properties.number(key = VisionOfHtmlInput::value.name.asName())
 }
 
 @Suppress("UnusedReceiverParameter")
 public inline fun VisionOutput.htmlRangeField(
-    min: Double,
-    max: Double,
-    step: Double = 1.0,
+    min: Number,
+    max: Number,
+    step: Number = 1.0,
     block: VisionOfRangeField.() -> Unit = {},
-): VisionOfRangeField = VisionOfRangeField(min, max, step).apply(block)
+): VisionOfRangeField = VisionOfRangeField(min.toDouble(), max.toDouble(), step.toDouble()).apply(block)
 

visionforge-core/src/commonMain/kotlin/space/kscience/visionforge/html/VisionOfHtmlForm.kt

@@ -8,6 +8,8 @@ import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 import space.kscience.dataforge.meta.Meta
 import space.kscience.dataforge.meta.node
+import space.kscience.dataforge.meta.string
+import space.kscience.visionforge.ClickControl
 
 /**
  * @param formId an id of the element in rendered DOM, this form is bound to
@@ -16,7 +18,7 @@ import space.kscience.dataforge.meta.node
 @SerialName("html.form")
 public class VisionOfHtmlForm(
     public val formId: String,
-) : VisionOfHtml() {
+) : VisionOfHtmlControl() {
     public var values: Meta? by properties.node()
 }
 
@@ -27,3 +29,20 @@ public fun <R> TagConsumer<R>.bindForm(
     this.id = visionOfForm.formId
     builder()
 }
+
+
+@Serializable
+@SerialName("html.button")
+public class VisionOfHtmlButton : VisionOfHtmlControl(), ClickControl {
+    public var label: String? by properties.string()
+}
+
+
+@Suppress("UnusedReceiverParameter")
+public inline fun VisionOutput.button(
+    text: String,
+    block: VisionOfHtmlButton.() -> Unit = {},
+): VisionOfHtmlButton = VisionOfHtmlButton().apply {
+    label = text
+    block()
+}

visionforge-core/src/jsMain/kotlin/space/kscience/visionforge/JsVisionClient.kt

@@ -135,7 +135,9 @@ public class JsVisionClient : AbstractPlugin(), VisionClient {
                         }
 
                         logger.debug { "Got $event for output with name $visionName" }
+                        context.launch {
                             vision.receiveEvent(event)
+                        }
                     } else {
                         logger.error { "WebSocket message data is not a string" }
                     }
@@ -262,7 +264,8 @@ public class JsVisionClient : AbstractPlugin(), VisionClient {
             numberVisionRenderer,
             textVisionRenderer,
             rangeVisionRenderer,
-            formVisionRenderer
+            formVisionRenderer,
+            buttonVisionRenderer
         ).associateByName()
     } else super<AbstractPlugin>.content(target)
 

visionforge-core/src/jsMain/kotlin/space/kscience/visionforge/formRenderers.kt

@@ -0,0 +1,90 @@
+package space.kscience.visionforge
+
+import kotlinx.browser.document
+import kotlinx.coroutines.launch
+import kotlinx.html.ButtonType
+import kotlinx.html.js.button
+import org.w3c.dom.HTMLFormElement
+import org.w3c.dom.HTMLInputElement
+import org.w3c.dom.get
+import org.w3c.xhr.FormData
+import space.kscience.dataforge.context.debug
+import space.kscience.dataforge.context.logger
+import space.kscience.dataforge.meta.*
+import space.kscience.dataforge.names.Name
+import space.kscience.visionforge.html.VisionOfHtmlButton
+import space.kscience.visionforge.html.VisionOfHtmlForm
+
+
+internal fun FormData.toMeta(): Meta {
+    @Suppress("UNUSED_VARIABLE") val formData = this
+    //val res = js("Object.fromEntries(formData);")
+    val `object` = js("{}")
+    //language=JavaScript
+    js(
+        """
+    formData.forEach(function(value, key){
+        // Reflect.has in favor of: object.hasOwnProperty(key)
+        if(!Reflect.has(object, key)){
+            object[key] = value;
+            return;
+        }
+        if(!Array.isArray(object[key])){
+            object[key] = [object[key]];    
+        }
+        object[key].push(value);
+    }); 
+    """
+    )
+    return DynamicMeta(`object`)
+}
+
+
+public fun VisionClient.sendMetaEvent(targetName: Name, payload: MetaRepr): Unit {
+    context.launch {
+        sendEvent(targetName, VisionMetaEvent(payload.toMeta()))
+    }
+}
+
+internal val formVisionRenderer: ElementVisionRenderer =
+    ElementVisionRenderer<VisionOfHtmlForm> { name, client, vision, _ ->
+
+        val form = document.getElementById(vision.formId) as? HTMLFormElement
+            ?: error("An element with id = '${vision.formId} is not a form")
+
+        form.subscribeToVision(vision)
+
+        vision.manager?.logger?.debug { "Adding hooks to form with id = '$vision.formId'" }
+
+        vision.useProperty(VisionOfHtmlForm::values) { values ->
+            vision.manager?.logger?.debug { "Updating form '${vision.formId}' with values $values" }
+            val inputs = form.getElementsByTagName("input")
+            values?.valueSequence()?.forEach { (token, value) ->
+                (inputs[token.toString()] as? HTMLInputElement)?.value = value.toString()
+            }
+        }
+
+        form.onsubmit = { event ->
+            event.preventDefault()
+            val formData = FormData(form).toMeta()
+            client.sendMetaEvent(name, formData)
+            console.info("Sent: ${formData.toMap()}")
+            false
+        }
+    }
+
+internal val buttonVisionRenderer: ElementVisionRenderer =
+    ElementVisionRenderer<VisionOfHtmlButton> { name, client, vision, _ ->
+        button(type = ButtonType.button).also { button ->
+            button.subscribeToVision(vision)
+            button.onclick = {
+                client.context.launch {
+                    client.sendEvent(name, VisionClickEvent(name = name))
+                }
+            }
+            vision.useProperty(VisionOfHtmlButton::label) {
+                button.innerHTML = it ?: ""
+            }
+
+        }
+    }

visionforge-core/src/jsMain/kotlin/space/kscience/visionforge/inputRenderers.kt

@@ -1,21 +1,17 @@
 package space.kscience.visionforge
 
-import kotlinx.browser.document
 import kotlinx.coroutines.launch
 import kotlinx.dom.clear
 import kotlinx.html.InputType
 import kotlinx.html.div
-import kotlinx.html.dom.append
 import kotlinx.html.js.input
 import org.w3c.dom.HTMLElement
-import org.w3c.dom.HTMLFormElement
 import org.w3c.dom.HTMLInputElement
 import org.w3c.dom.events.Event
-import org.w3c.dom.get
-import org.w3c.xhr.FormData
-import space.kscience.dataforge.context.debug
-import space.kscience.dataforge.context.logger
-import space.kscience.dataforge.meta.*
+import space.kscience.dataforge.meta.Value
+import space.kscience.dataforge.meta.asValue
+import space.kscience.dataforge.meta.double
+import space.kscience.dataforge.meta.string
 import space.kscience.dataforge.names.Name
 import space.kscience.visionforge.html.*
 
@@ -24,7 +20,7 @@ import space.kscience.visionforge.html.*
  *
  * @param vision The vision to subscribe to.
  */
-private fun HTMLElement.subscribeToVision(vision: VisionOfHtml) {
+internal fun HTMLElement.subscribeToVision(vision: VisionOfHtml) {
     vision.useProperty(VisionOfHtml::classes) {
         classList.value = classes.joinToString(separator = " ")
     }
@@ -33,7 +29,7 @@ private fun HTMLElement.subscribeToVision(vision: VisionOfHtml) {
 
 private fun VisionClient.sendInputEvent(name: Name, value: Value?) {
     context.launch {
-        sendEvent(name, VisionValueChangeEvent(value))
+        sendEvent(name, VisionValueChangeEvent(value, name))
     }
 }
 
@@ -51,20 +47,16 @@ private fun HTMLInputElement.subscribeToInput(inputVision: VisionOfHtmlInput) {
 
 internal val htmlVisionRenderer: ElementVisionRenderer =
     ElementVisionRenderer<VisionOfPlainHtml> { _, _, vision, _ ->
-        div {}.also { div ->
+        div().also { div ->
             div.subscribeToVision(vision)
             vision.useProperty(VisionOfPlainHtml::content) {
                 div.clear()
-                div.append {
-
-                }
-                div.textContent = it
+                if (it != null) div.innerHTML = it
             }
         }
     }
 
-internal val inputVisionRenderer: ElementVisionRenderer =
-    ElementVisionRenderer<VisionOfHtmlInput>(
+internal val inputVisionRenderer: ElementVisionRenderer = ElementVisionRenderer<VisionOfHtmlInput>(
     acceptRating = ElementVisionRenderer.DEFAULT_RATING - 1
 ) { name, client, vision, _ ->
     input {
@@ -95,7 +87,7 @@ internal val checkboxVisionRenderer: ElementVisionRenderer =
             type = InputType.checkBox
         }.also { htmlInputElement ->
             val onEvent: (Event) -> Unit = {
-                client.sendInputEvent(name, htmlInputElement.value.asValue())
+                client.sendInputEvent(name, htmlInputElement.checked.asValue())
             }
 
 
@@ -140,7 +132,7 @@ internal val textVisionRenderer: ElementVisionRenderer =
 internal val numberVisionRenderer: ElementVisionRenderer =
     ElementVisionRenderer<VisionOfNumberField> { name, client, vision, _ ->
         input {
-            type = InputType.text
+            type = InputType.number
         }.also { htmlInputElement ->
 
             val onEvent: (Event) -> Unit = {
@@ -165,7 +157,7 @@ internal val numberVisionRenderer: ElementVisionRenderer =
 internal val rangeVisionRenderer: ElementVisionRenderer =
     ElementVisionRenderer<VisionOfRangeField> { name, client, vision, _ ->
         input {
-            type = InputType.text
+            type = InputType.range
             min = vision.min.toString()
             max = vision.max.toString()
             step = vision.step.toString()
@@ -189,53 +181,3 @@ internal val rangeVisionRenderer: ElementVisionRenderer =
             }
         }
     }
-
-internal fun FormData.toMeta(): Meta {
-    @Suppress("UNUSED_VARIABLE") val formData = this
-    //val res = js("Object.fromEntries(formData);")
-    val `object` = js("{}")
-    //language=JavaScript
-    js(
-        """
-    formData.forEach(function(value, key){
-        // Reflect.has in favor of: object.hasOwnProperty(key)
-        if(!Reflect.has(object, key)){
-            object[key] = value;
-            return;
-        }
-        if(!Array.isArray(object[key])){
-            object[key] = [object[key]];    
-        }
-        object[key].push(value);
-    }); 
-    """
-    )
-    return DynamicMeta(`object`)
-}
-
-internal val formVisionRenderer: ElementVisionRenderer =
-    ElementVisionRenderer<VisionOfHtmlForm> { name, client, vision, _ ->
-
-        val form = document.getElementById(vision.formId) as? HTMLFormElement
-            ?: error("An element with id = '${vision.formId} is not a form")
-
-        form.subscribeToVision(vision)
-
-        vision.manager?.logger?.debug { "Adding hooks to form with id = '$vision.formId'" }
-
-        vision.useProperty(VisionOfHtmlForm::values) { values ->
-            vision.manager?.logger?.debug { "Updating form '${vision.formId}' with values $values" }
-            val inputs = form.getElementsByTagName("input")
-            values?.valueSequence()?.forEach { (token, value) ->
-                (inputs[token.toString()] as? HTMLInputElement)?.value = value.toString()
-            }
-        }
-
-        form.onsubmit = { event ->
-            event.preventDefault()
-            val formData = FormData(form).toMeta()
-            client.sendMetaEvent(name, formData)
-            console.info("Sent: ${formData.toMap()}")
-            false
-        }
-    }