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Commit f9b731d3 authored by Grace Kloba's avatar Grace Kloba
Browse files

Add a WebSettings to control whether WebView will 

use some perf trick, e.g. pause updating the picture,
during panning and zooming transition.

Fix http://b/issue?id=2784020
parent 05dd626a

api/current.xml

+24 −0
Original line number Diff line number Diff line
@@ -200811,6 +200811,17 @@ 
 deprecated="not deprecated"

 visibility="public"

>

<method name="enableSmoothTransition"

 return="boolean"

 abstract="false"

 native="false"

 synchronized="false"

 static="false"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

</method>

<method name="getAllowFileAccess"

 return="boolean"

 abstract="false"
@@ -201426,6 +201437,19 @@ 
<parameter name="flag" type="boolean">

</parameter>

</method>

<method name="setEnableSmoothTransition"

 return="void"

 abstract="false"

 native="false"

 synchronized="false"

 static="false"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

<parameter name="enable" type="boolean">

</parameter>

</method>

<method name="setFantasyFontFamily"

 return="void"

 abstract="false"

core/java/android/webkit/WebSettings.java

+20 −0
Original line number Diff line number Diff line
@@ -207,6 +207,7 @@ public class WebSettings { 
    private boolean         mBuiltInZoomControls = false;

    private boolean         mAllowFileAccess = true;

    private boolean         mLoadWithOverviewMode = false;

    private boolean         mEnableSmoothTransition = false;



    // private WebSettings, not accessible by the host activity

    static private int      mDoubleTapToastCount = 3;
@@ -522,6 +523,25 @@ public class WebSettings { 
        return mLoadWithOverviewMode;

    }



    /**

     * Set whether the WebView will enable smooth transition while panning or

     * zooming. If it is true, WebView will choose a solution to maximize the

     * performance. e.g. the WebView's content may not be updated during the

     * transition. If it is false, WebView will keep its fidelity. The default

     * value is false.

     */

    public void setEnableSmoothTransition(boolean enable) {

        mEnableSmoothTransition = enable;

    }



    /**

     * Returns true if the WebView enables smooth transition while panning or

     * zooming.

     */

    public boolean enableSmoothTransition() {

        return mEnableSmoothTransition;

    }



    /**

     * Store whether the WebView is saving form data.

     */

core/java/android/webkit/WebViewCore.java

+6 −0
Original line number Diff line number Diff line
@@ -1871,6 +1871,8 @@ final class WebViewCore { 
        // called from UI thread while WEBKIT_DRAW is just pulled out of the

        // queue in WebCore thread to be executed. Then update won't be blocked.

        if (core != null) {

            if (!core.getSettings().enableSmoothTransition()) return;



            synchronized (core) {

                core.mDrawIsPaused = true;

                if (core.mDrawIsScheduled) {
@@ -1883,6 +1885,10 @@ final class WebViewCore { 


    static void resumeUpdatePicture(WebViewCore core) {

        if (core != null) {

            // if mDrawIsPaused is true, ignore the setting, continue to resume

            if (!core.mDrawIsPaused

                    && !core.getSettings().enableSmoothTransition()) return;



            synchronized (core) {

                core.mDrawIsPaused = false;

                if (core.mDrawIsScheduled) {