Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/compositor/layouts/EdgeSwipeHandlerLayoutDelegate.java

+// 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.chrome.browser.compositor.layouts;
+
+import org.chromium.chrome.browser.compositor.layouts.eventfilter.EdgeSwipeEventFilter.ScrollDirection;
+import org.chromium.chrome.browser.compositor.layouts.eventfilter.EdgeSwipeHandler;
+import org.chromium.chrome.browser.compositor.layouts.eventfilter.EmptyEdgeSwipeHandler;
+
+/**
+ * A {@link EdgeSwipeHandler} that takes a {@link LayoutProvider} and delegates all swipe events
+ * to {@link LayoutProvider#getActiveLayout()}.
+ */
+public class EdgeSwipeHandlerLayoutDelegate extends EmptyEdgeSwipeHandler {
+    private final LayoutProvider mLayoutProvider;
+
+    /**
+     * Creates an instance of the {@link EdgeSwipeHandlerLayoutDelegate}.
+     * @param provider A {@link LayoutProvider} instance.
+     */
+    public EdgeSwipeHandlerLayoutDelegate(LayoutProvider provider) {
+        mLayoutProvider = provider;
+    }
+
+    @Override
+    public void swipeStarted(ScrollDirection direction, float x, float y) {
+        if (mLayoutProvider.getActiveLayout() == null) return;
+        mLayoutProvider.getActiveLayout().swipeStarted(LayoutManager.time(), direction, x, y);
+    }
+
+    @Override
+    public void swipeUpdated(float x, float y, float dx, float dy, float tx, float ty) {
+        if (mLayoutProvider.getActiveLayout() == null) return;
+        mLayoutProvider.getActiveLayout().swipeUpdated(LayoutManager.time(), x, y, dx, dy, tx, ty);
+    }
+
+    @Override
+    public void swipeFinished() {
+        if (mLayoutProvider.getActiveLayout() == null) return;
+        mLayoutProvider.getActiveLayout().swipeFinished(LayoutManager.time());
+    }
+
+    @Override
+    public void swipeFlingOccurred(float x, float y, float tx, float ty, float vx, float vy) {
+        if (mLayoutProvider.getActiveLayout() == null) return;
+        mLayoutProvider.getActiveLayout().swipeFlingOccurred(
+                LayoutManager.time(), x, y, tx, ty, vx, vy);
+    }
+}