1 files changed, 38 insertions, 0 deletions
diff --git a/mavigator-cockpit/src/main/scala/mavigator/util/Page.scala b/mavigator-cockpit/src/main/scala/mavigator/util/Page.scala
new file mode 100644
index 0000000..f8f0dee
--- /dev/null
+++ b/mavigator-cockpit/src/main/scala/mavigator/util/Page.scala
@@ -0,0 +1,38 @@
+package mavigator
+package util
+
+import org.scalajs.dom
+import org.scalajs.dom.html
+
+/** Contents of a single-page app, consisting of styles and a main element. */
+trait Page {
+
+  private var isAttached = false
+  private def attached[A](action: => A) = if (!isAttached) {
+    sys.error("Page has not been attached to an environment yet.")
+  } else {
+    action
+  }
+
+  private var baseUrl: String = null
+
+  def asset(path: String): String = attached { baseUrl + "/" + path }
+
+  def styles: Seq[String]
+
+  def elements: Seq[html.Element]
+
+  /** Attach this page to a website. */
+  def attach(env: Environment): Unit = {
+    baseUrl = env.baseUrl
+    isAttached = true
+
+    val styleText = dom.document.createTextNode(styles.reduce(_ + _))
+    env.styleRoot.appendChild(styleText)
+
+    for (elem <- elements) {
+      env.root.appendChild(elem)
+    }
+  }
+
+}