gecko/mobile/android/base/gfx/LayerView.java

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 *
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 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
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 * for the specific language governing rights and limitations under the
 * License.
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 * The Original Code is Mozilla Android code.
 *
 * The Initial Developer of the Original Code is Mozilla Foundation.
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 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Patrick Walton <pcwalton@mozilla.com>
 *
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 * either the GNU General Public License Version 2 or later (the "GPL"), or
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package org.mozilla.gecko.gfx;

import org.mozilla.gecko.gfx.FloatSize;
import org.mozilla.gecko.gfx.InputConnectionHandler;
import org.mozilla.gecko.gfx.LayerController;
import android.content.Context;
import android.opengl.GLSurfaceView;
import android.view.GestureDetector;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputConnection;
import android.view.ScaleGestureDetector;

/**
 * A view rendered by the layer compositor.
 *
 * This view delegates to LayerRenderer to actually do the drawing. Its role is largely that of a
 * mediator between the LayerRenderer and the LayerController.
 */
public class LayerView extends GLSurfaceView {
    private Context mContext;
    private LayerController mController;
    private InputConnectionHandler mInputConnectionHandler;
    private LayerRenderer mRenderer;
    private GestureDetector mGestureDetector;
    private ScaleGestureDetector mScaleGestureDetector;
    private long mRenderTime;
    private boolean mRenderTimeReset;

    public LayerView(Context context, LayerController controller) {
        super(context);

        mContext = context;
        mController = controller;
        mRenderer = new LayerRenderer(this);
        setRenderer(mRenderer);
        setRenderMode(RENDERMODE_WHEN_DIRTY);
        mGestureDetector = new GestureDetector(context, controller.getGestureListener());
        mScaleGestureDetector = new ScaleGestureDetector(context, controller.getScaleGestureListener());
        mGestureDetector.setOnDoubleTapListener(controller.getDoubleTapListener());
        mInputConnectionHandler = null;

        setFocusable(true);
        setFocusableInTouchMode(true);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (mGestureDetector.onTouchEvent(event))
            return true;
        mScaleGestureDetector.onTouchEvent(event);
        if (mScaleGestureDetector.isInProgress())
            return true;
        return mController.onTouchEvent(event);
    }

    public LayerController getController() { return mController; }

    /** The LayerRenderer calls this to indicate that the window has changed size. */
    public void setViewportSize(IntSize size) {
        mController.setViewportSize(new FloatSize(size));
    }

    public void setInputConnectionHandler(InputConnectionHandler handler) {
        mInputConnectionHandler = handler;
    }

    @Override
    public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
        if (mInputConnectionHandler != null)
            return mInputConnectionHandler.onCreateInputConnection(outAttrs);
        return null;
    }

    @Override
    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
        if (mInputConnectionHandler != null)
            return mInputConnectionHandler.onKeyPreIme(keyCode, event);
        return false;
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (mInputConnectionHandler != null)
            return mInputConnectionHandler.onKeyDown(keyCode, event);
        return false;
    }

    @Override
    public boolean onKeyLongPress(int keyCode, KeyEvent event) {
        if (mInputConnectionHandler != null)
            return mInputConnectionHandler.onKeyLongPress(keyCode, event);
        return false;
    }

    @Override
    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
        if (mInputConnectionHandler != null)
            return mInputConnectionHandler.onKeyMultiple(keyCode, repeatCount, event);
        return false;
    }

    @Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        if (mInputConnectionHandler != null)
            return mInputConnectionHandler.onKeyUp(keyCode, event);
        return false;
    }

    @Override
    public void requestRender() {
        super.requestRender();

        synchronized(this) {
            if (!mRenderTimeReset) {
                mRenderTimeReset = true;
                mRenderTime = System.nanoTime();
            }
        }
    }

    /**
     * Returns the time elapsed between the first call of requestRender() after
     * the last call of getRenderTime(), in nanoseconds.
     */
    public long getRenderTime() {
        synchronized(this) {
            mRenderTimeReset = false;
            return System.nanoTime() - mRenderTime;
        }
    }
}