Expose text track settings in Content and implement for Android

content/public/android/java/src/org/chromium/content/browser/accessibility/captioning/CaptioningStyle.java

Index: content/public/android/java/src/org/chromium/content/browser/accessibility/captioning/CaptioningStyle.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/accessibility/captioning/CaptioningStyle.java b/content/public/android/java/src/org/chromium/content/browser/accessibility/captioning/CaptioningStyle.java
new file mode 100644
index 0000000000000000000000000000000000000000..36b2889376cbbd02a34b72b69c872a62321129e1
--- /dev/null
+++ b/content/public/android/java/src/org/chromium/content/browser/accessibility/captioning/CaptioningStyle.java
@@ -0,0 +1,145 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.content.browser.accessibility.captioning;
+
+import android.annotation.SuppressLint;
+import android.annotation.TargetApi;
+import android.graphics.Typeface;
+import android.os.Build;
+import android.view.accessibility.CaptioningManager.CaptionStyle;
+
+/**
+ * This is an internal representation of the captioning. This class follows
+ * the paradigm that was introduced in KitKat while not using that API directly so that it can be
+ * used everywhere.
+ *
+ * For information on CaptionStyle, introduced in KitKat, see:
+ * @link https://developer.android.com/reference/android/view/accessibility/CaptioningManager.CaptionStyle.html
+ */
+@TargetApi(Build.VERSION_CODES.KITKAT)
+public class CaptioningStyle {
+    private Integer mBackgroundColor;
+    private Integer mEdgeColor;
+    private Integer mEdgeType;
+    private Integer mForegroundColor;
+    private Integer mWindowColor;
+    private Typeface mTypeface;
+
+    /**
+     * Construct a Chromium CaptioningStyle object.
+     *
+     * @param backgroundColor background color of the CaptioningStyle
+     * @param edgeColor edge color of the CaptioningStyle
+     * @param edgeType edgeType of the CaptioningStyle
+     * @param foregroundColor foreground color of the CaptioningStyle
+     * @param windowColor window color of the CaptioningStyle
+     * @param typeFace Typeface of the CaptioningStyle
+     */
+    public CaptioningStyle(Integer backgroundColor, Integer edgeColor, Integer edgeType,
+            Integer foregroundColor, Integer windowColor, Typeface typeface) {
+        mBackgroundColor = backgroundColor;
+        mEdgeColor = edgeColor;
+        mEdgeType = edgeType;
+        mForegroundColor = foregroundColor;
+        mWindowColor = windowColor;
+        mTypeface = typeface;
+    }
+
+    /**
+     * @return the background color specified by the platform if one was specified
+     *         otherwise returns null
+     */
+    public Integer getBackgroundColor() {
+        return mBackgroundColor;
+    }
+
+    /**
+     * @return the edge color specified by the platform if one was specified
+     *         otherwise returns null
+     */
+    public Integer getEdgeColor() {
+        return mEdgeColor;
+    }
+
+    /**
+     * @return the edge type specified by the platform if one was specified
+     *         otherwise returns null
+     */
+    public Integer getEdgeType() {
+        return mEdgeType;
+    }
+
+    /**
+     * @return the foreground color specified by the platform if one was specified
+     *         otherwise returns null
+     */
+    public Integer getForegroundColor() {
+        return mForegroundColor;
+    }
+
+    /**
+     * @return the window color specified by the platform if one was specified
+     *         otherwise returns null
+     */
+    public Integer getWindowColor() {
+        return mWindowColor;
+    }
+
+    /**
+     * @return the Typeface specified by the platform if one was specified
+     *         otherwise returns null
+     */
+    public Typeface getTypeface() {
+        return mTypeface;
+    }
+
+    /**
+     * Converts from a platform CaptionStyle to a Chromium CaptioningStyle. In the case that null
+     * is passed in, a CaptioningStyle that includes no settings is returned.
+     * This is safe to call on KitKat.
+     *
+     * KitKat CaptionStyle supported neither windowColor nor a few enum values of edgeType.
+     *
+     * @param captionStyle an Android platform CaptionStyle object
+     * @return a Chromium CaptioningStyle object
+     */
+    @SuppressLint("NewApi")
+    public static CaptioningStyle createFrom(CaptionStyle captionStyle) {
+        if (captionStyle == null) {
+            return new CaptioningStyle(null, null, null, null, null, null);
+        }
+
+        Integer backgroundColor = null;
+        Integer edgeColor = null;
+        Integer edgeType = null;
+        Integer foregroundColor = null;
+        Integer windowColor = null;
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            if (captionStyle.hasBackgroundColor()) {
+                backgroundColor = Integer.valueOf(captionStyle.backgroundColor);
+            }
+            if (captionStyle.hasEdgeColor()) {
+                edgeColor = Integer.valueOf(captionStyle.edgeColor);
+            }
+            if (captionStyle.hasEdgeType()) {
+                edgeType = Integer.valueOf(captionStyle.edgeType);
+            }
+            if (captionStyle.hasForegroundColor()) {
+                foregroundColor = Integer.valueOf(captionStyle.foregroundColor);
+            }
+            if (captionStyle.hasWindowColor()) {
+                windowColor = Integer.valueOf(captionStyle.windowColor);
+            }
+        } else {
+            backgroundColor = Integer.valueOf(captionStyle.backgroundColor);
+            edgeColor = Integer.valueOf(captionStyle.edgeColor);
+            edgeType = Integer.valueOf(captionStyle.edgeType);
+            foregroundColor = Integer.valueOf(captionStyle.foregroundColor);
+        }
+
+        return new CaptioningStyle(backgroundColor, edgeColor, edgeType, foregroundColor,
+                windowColor, captionStyle.getTypeface());
+    }
+}