chrome/android: Push EventFilters into the Layout implementations.

chrome/android/java/src/org/chromium/chrome/browser/compositor/layouts/GestureHandlerLayoutDelegate.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.GestureHandler;
-
-/**
- * A {@link GestureHandler} that takes a {@link LayoutProvider} and delegates all gesture events
- * to {@link LayoutProvider#getActiveLayout()}.
- */
-class GestureHandlerLayoutDelegate implements GestureHandler {
-    private final LayoutProvider mLayoutProvider;
-
-    /**
-     * Creates an instance of the {@link GestureHandlerLayoutDelegate}.
-     * @param provider A {@link LayoutProvider} instance.
-     */
-    public GestureHandlerLayoutDelegate(LayoutProvider provider) {
-        mLayoutProvider = provider;
-    }
-
-    @Override
-    public void onDown(float x, float y, boolean fromMouse, int buttons) {
-        if (mLayoutProvider.getActiveLayout() == null) return;
-        mLayoutProvider.getActiveLayout().onDown(LayoutManager.time(), x, y);
-    }
-
-    @Override
-    public void onUpOrCancel() {
-        if (mLayoutProvider.getActiveLayout() == null) return;
-        mLayoutProvider.getActiveLayout().onUpOrCancel(LayoutManager.time());
-    }
-
-    @Override
-    public void drag(float x, float y, float dx, float dy, float tx, float ty) {
-        if (mLayoutProvider.getActiveLayout() == null) return;
-        mLayoutProvider.getActiveLayout().drag(LayoutManager.time(), x, y, dx, dy);
-    }
-
-    @Override
-    public void click(float x, float y, boolean fromMouse, int buttons) {
-        if (mLayoutProvider.getActiveLayout() == null) return;
-        mLayoutProvider.getActiveLayout().click(LayoutManager.time(), x, y);
-    }
-
-    @Override
-    public void fling(float x, float y, float velocityX, float velocityY) {
-        if (mLayoutProvider.getActiveLayout() == null) return;
-        mLayoutProvider.getActiveLayout().fling(LayoutManager.time(), x, y, velocityX, velocityY);
-    }
-
-    @Override
-    public void onLongPress(float x, float y) {
-        if (mLayoutProvider.getActiveLayout() == null) return;
-        mLayoutProvider.getActiveLayout().onLongPress(LayoutManager.time(), x, y);
-    }
-
-    @Override
-    public void onPinch(float x0, float y0, float x1, float y1, boolean firstEvent) {
-        if (mLayoutProvider.getActiveLayout() == null) return;
-        mLayoutProvider.getActiveLayout().onPinch(LayoutManager.time(), x0, y0, x1, y1, firstEvent);
-    }
-}