Add video component (#150)

* Add video component

* Accept file instead of source & add controls property

Author: AustinShalit

ui-vaadin/src/main/kotlin/edu/wpi/axon/ui/component/Video.kt

@@ -0,0 +1,46 @@
+package edu.wpi.axon.ui.component
+
+import com.github.mvysny.karibudsl.v10.VaadinDsl
+import com.github.mvysny.karibudsl.v10.init
+import com.vaadin.flow.component.Component
+import com.vaadin.flow.component.HasComponents
+import com.vaadin.flow.component.HasSize
+import com.vaadin.flow.component.HasStyle
+import com.vaadin.flow.component.Tag
+import com.vaadin.flow.dom.Element
+import com.vaadin.flow.server.InputStreamFactory
+import com.vaadin.flow.server.StreamResource
+import java.io.File
+import java.io.FileInputStream
+
+@Tag("video")
+class Video(file: File) : Component(), HasSize, HasStyle {
+    private class Source(file: File) : Element("source") {
+        init {
+            setAttribute("src", StreamResource(file.name, InputStreamFactory { FileInputStream(file) }))
+        }
+    }
+
+    var controls: Boolean
+        get() = element.hasAttribute("controls")
+        set(value) {
+            if (value) {
+                element.setAttribute("controls", "")
+            } else {
+                element.removeAttribute("controls")
+            }
+        }
+
+    var volume: Double
+        get() = element.getProperty("volume", 0.0)
+        set(value) { element.setProperty("volume", value) }
+
+    init {
+        controls = true
+
+        element.appendChild(Source(file))
+    }
+}
+
+@VaadinDsl
+fun (@VaadinDsl HasComponents).video(file: File, block: (@VaadinDsl Video).() -> Unit = {}) = init(Video(file), block)