Add loop and preload attributes for media elements, fix null poster (#9797)

Picked from #9161

Fixes #7261
Fixes #5178
Fixes #4409

2 files changed, 65 insertions, 0 deletions

diff --git a/shared/src/main/java/com/vaadin/shared/ui/AbstractMediaState.java b/shared/src/main/java/com/vaadin/shared/ui/AbstractMediaState.java
index d7cddf566a..6d5024a324 100644
--- a/shared/src/main/java/com/vaadin/shared/ui/AbstractMediaState.java
+++ b/shared/src/main/java/com/vaadin/shared/ui/AbstractMediaState.java
@@ -36,6 +36,22 @@ public class AbstractMediaState extends AbstractComponentState {
     @NoLayout
     public boolean muted;
 
+    /**
+     * Preload mode for the media.
+     *
+     * @since 7.7.11
+     */
+    @NoLayout
+    public PreloadMode preload;
+
+    /**
+     * Looping of media active (true) or not.
+     *
+     * @since 7.7.11
+     */
+    @NoLayout
+    public boolean loop;
+
     public List<URLReference> sources = new ArrayList<>();
 
     public List<String> sourceTypes = new ArrayList<>();
diff --git a/shared/src/main/java/com/vaadin/shared/ui/PreloadMode.java b/shared/src/main/java/com/vaadin/shared/ui/PreloadMode.java
new file mode 100644
index 0000000000..111278fb0c
--- /dev/null
+++ b/shared/src/main/java/com/vaadin/shared/ui/PreloadMode.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2000-2016 Vaadin Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.vaadin.shared.ui;
+
+/**
+ * Enumeration that provides a hint to the browser how media should be
+ * preloaded.
+ *
+ * @since 7.7.11
+ */
+public enum PreloadMode {
+    /**
+     * Indicates that the whole video/audio file could be downloaded, even if
+     * the user is not expected to use it. This is the default value.
+     */
+    AUTO,
+
+    /**
+     * Indicates that only media metadata (e.g. length) should be preloaded.
+     */
+    METADATA,
+
+    /**
+     * Indicates that the video/audio should not be preloaded.
+     */
+    NONE;
+
+    /**
+     * Returns the preload mode string used by the browser.
+     *
+     * @return corresponding preload attribute value string
+     */
+    public String getValue() {
+        return name().toLowerCase();
+    }
+}