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Commit bf4650ca authored by Grace Kloba's avatar Grace Kloba
Browse files

According to GMail profile, almost half of WebView 

init time is spent in creating the zoomControl which
is not used by them. So change to lazy initialize
the ZoomButtonControl which will be used by Browser.

Fix http://b/issue?id=2546481
parent 5101de06

core/java/android/webkit/WebView.java

+26 −20
Original line number Diff line number Diff line
@@ -763,6 +763,8 @@ public class WebView extends AbsoluteLayout 
    private ExtendedZoomControls mZoomControls;

    private Runnable mZoomControlRunnable;



    // mZoomButtonsController will be lazy initialized in

    // getZoomButtonsController() to get better performance.

    private ZoomButtonsController mZoomButtonsController;



    // These keep track of the center point of the zoom.  They are used to
@@ -844,18 +846,6 @@ public class WebView extends AbsoluteLayout 
        mDatabase = WebViewDatabase.getInstance(context);

        mScroller = new OverScroller(context);



        mZoomButtonsController = new ZoomButtonsController(this);

        mZoomButtonsController.setOnZoomListener(mZoomListener);

        // ZoomButtonsController positions the buttons at the bottom, but in

        // the middle.  Change their layout parameters so they appear on the

        // right.

        View controls = mZoomButtonsController.getZoomControls();

        ViewGroup.LayoutParams params = controls.getLayoutParams();

        if (params instanceof FrameLayout.LayoutParams) {

            FrameLayout.LayoutParams frameParams = (FrameLayout.LayoutParams)

                    params;

            frameParams.gravity = Gravity.RIGHT;

        }

        updateMultiTouchSupport(context);

    }
@@ -875,15 +865,16 @@ public class WebView extends AbsoluteLayout 
    private void updateZoomButtonsEnabled() {

        boolean canZoomIn = mActualScale < mMaxZoomScale;

        boolean canZoomOut = mActualScale > mMinZoomScale && !mInZoomOverview;

        ZoomButtonsController controller = getZoomButtonsController();

        if (!canZoomIn && !canZoomOut) {

            // Hide the zoom in and out buttons, as well as the fit to page

            // button, if the page cannot zoom

            mZoomButtonsController.getZoomControls().setVisibility(View.GONE);

            controller.getZoomControls().setVisibility(View.GONE);

        } else {

            // Set each one individually, as a page may be able to zoom in

            // or out.

            mZoomButtonsController.setZoomInEnabled(canZoomIn);

            mZoomButtonsController.setZoomOutEnabled(canZoomOut);

            controller.setZoomInEnabled(canZoomIn);

            controller.setZoomOutEnabled(canZoomOut);

        }

    }
@@ -1760,7 +1751,7 @@ public class WebView extends AbsoluteLayout 
        }

        clearTextEntry(false);

        if (getSettings().getBuiltInZoomControls()) {

            mZoomButtonsController.setVisible(true);

            getZoomButtonsController().setVisible(true);

        } else {

            mPrivateHandler.removeCallbacks(mZoomControlRunnable);

            mPrivateHandler.postDelayed(mZoomControlRunnable,
@@ -4072,7 +4063,7 @@ public class WebView extends AbsoluteLayout 
                // false for the first parameter

            }

        } else {

            if (getSettings().getBuiltInZoomControls() && !mZoomButtonsController.isVisible()) {

            if (getSettings().getBuiltInZoomControls() && !getZoomButtonsController().isVisible()) {

                /*

                 * The zoom controls come in their own window, so our window

                 * loses focus. Our policy is to not draw the cursor ring if
@@ -5050,7 +5041,7 @@ public class WebView extends AbsoluteLayout 
        WebSettings settings = getSettings();

        if (settings.supportZoom()

                && settings.getBuiltInZoomControls()

                && !mZoomButtonsController.isVisible()

                && !getZoomButtonsController().isVisible()

                && mMinZoomScale < mMaxZoomScale) {

            mZoomButtonsController.setVisible(true);

            int count = settings.getDoubleTapToastCount();
@@ -5593,6 +5584,19 @@ public class WebView extends AbsoluteLayout 
     * @hide

     */

    public ZoomButtonsController getZoomButtonsController() {

        if (mZoomButtonsController == null) {

            mZoomButtonsController = new ZoomButtonsController(this);

            mZoomButtonsController.setOnZoomListener(mZoomListener);

            // ZoomButtonsController positions the buttons at the bottom, but in

            // the middle. Change their layout parameters so they appear on the

            // right.

            View controls = mZoomButtonsController.getZoomControls();

            ViewGroup.LayoutParams params = controls.getLayoutParams();

            if (params instanceof FrameLayout.LayoutParams) {

                FrameLayout.LayoutParams frameParams = (FrameLayout.LayoutParams) params;

                frameParams.gravity = Gravity.RIGHT;

            }

        }

        return mZoomButtonsController;

    }
@@ -5832,7 +5836,9 @@ public class WebView extends AbsoluteLayout 
        if (mWebViewCore == null) {

            // maybe called after WebView's destroy(). As we can't get settings,

            // just hide zoom control for both styles.

            if (mZoomButtonsController != null) {

                mZoomButtonsController.setVisible(false);

            }

            if (mZoomControls != null) {

                mZoomControls.hide();

            }
@@ -5840,7 +5846,7 @@ public class WebView extends AbsoluteLayout 
        }

        WebSettings settings = getSettings();

        if (settings.getBuiltInZoomControls()) {

            if (mZoomButtonsController.isVisible()) {

            if (getZoomButtonsController().isVisible()) {

                mZoomButtonsController.setVisible(false);

            }

        } else {