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Commit b28fb721 authored by Charles Chen's avatar Charles Chen
Browse files

Trust System UI owned display to receive keys 

A11y service cannot get focus of bubbles because it's not a
System owned display. This patch makes System UI owned display
a trusted display. Moreover, this patch refactors the logic to
identify a trusted display by introducing FLAG_TRUSTED and
removes the trusted display check along with supportsSystemDecorations()
because the check has been included in supportsSystemDecorations().

fixes: 155823002
Bug: 152416787
Test: atest DisplayContentTests
Test: atest WindowFocusTests
Test: atest TaskDisplayAreaTests
Test: atest MultiDisplaySystemDecorationTests
Test: atest DisplayTest
Change-Id: Ie684c6488904e5aa8cae166a455c6d55455e5f55
parent 316f0d36

api/test-current.txt

+1 −0
Original line number Diff line number Diff line
@@ -5103,6 +5103,7 @@ package android.view { 
    method @NonNull public android.graphics.ColorSpace[] getSupportedWideColorGamut();

    method public int getType();

    method public boolean hasAccess(int);

    field public static final int FLAG_TRUSTED = 128; // 0x80

    field public static final int TYPE_EXTERNAL = 2; // 0x2

    field public static final int TYPE_INTERNAL = 1; // 0x1

    field public static final int TYPE_OVERLAY = 4; // 0x4

core/java/android/hardware/display/DisplayManager.java

+12 −0
Original line number Diff line number Diff line
@@ -303,13 +303,25 @@ public final class DisplayManager { 
    /**

     * Virtual display flag: Indicates that the display should support system decorations. Virtual

     * displays without this flag shouldn't show home, IME or any other system decorations.

     * <p>This flag doesn't work without {@link #VIRTUAL_DISPLAY_FLAG_TRUSTED}</p>

     *

     * @see #createVirtualDisplay

     * @see #VIRTUAL_DISPLAY_FLAG_TRUSTED

     * @hide

     */

    // TODO (b/114338689): Remove the flag and use IWindowManager#setShouldShowSystemDecors

    public static final int VIRTUAL_DISPLAY_FLAG_SHOULD_SHOW_SYSTEM_DECORATIONS = 1 << 9;



    /**

     * Virtual display flags: Indicates that the display is trusted to show system decorations and

     * receive inputs without users' touch.

     *

     * @see #createVirtualDisplay

     * @see #VIRTUAL_DISPLAY_FLAG_SHOULD_SHOW_SYSTEM_DECORATIONS

     * @hide

     */

    public static final int VIRTUAL_DISPLAY_FLAG_TRUSTED = 1 << 10;



    /** @hide */

    public DisplayManager(Context context) {

        mContext = context;

core/java/android/view/Display.java

+24 −0
Original line number Diff line number Diff line
@@ -241,12 +241,25 @@ public final class Display { 
     * This flag identifies secondary displays that should show system decorations, such as status

     * bar, navigation bar, home activity or IME.

     * </p>

     * <p>Note that this flag doesn't work without {@link #FLAG_TRUSTED}</p>

     *

     * @see #getFlags()

     * @hide

     */

    // TODO (b/114338689): Remove the flag and use IWindowManager#setShouldShowSystemDecors

    public static final int FLAG_SHOULD_SHOW_SYSTEM_DECORATIONS = 1 << 6;



    /**

     * Flag: The display is trusted to show system decorations and receive inputs without users'

     * touch.

     * @see #FLAG_SHOULD_SHOW_SYSTEM_DECORATIONS

     *

     * @see #getFlags()

     * @hide

     */

    @TestApi

    public static final int FLAG_TRUSTED = 1 << 7;



    /**

     * Display flag: Indicates that the contents of the display should not be scaled

     * to fit the physical screen dimensions.  Used for development only to emulate
@@ -564,6 +577,7 @@ public final class Display { 
     * @see #FLAG_SUPPORTS_PROTECTED_BUFFERS

     * @see #FLAG_SECURE

     * @see #FLAG_PRIVATE

     * @see #FLAG_ROUND

     */

    public int getFlags() {

        return mFlags;
@@ -1222,6 +1236,16 @@ public final class Display { 
                Display.FLAG_PRESENTATION;

    }



    /**

     * @return {@code true} if the display is a trusted display.

     *

     * @see #FLAG_TRUSTED

     * @hide

     */

    public boolean isTrusted() {

        return (mFlags & FLAG_TRUSTED) == FLAG_TRUSTED;

    }



    private void updateDisplayInfoLocked() {

        // Note: The display manager caches display info objects on our behalf.

        DisplayInfo newInfo = mGlobal.getDisplayInfo(mDisplayId);

core/java/android/view/DisplayInfo.java

+9 −0
Original line number Diff line number Diff line
@@ -717,6 +717,15 @@ public final class DisplayInfo implements Parcelable { 
        if ((flags & Display.FLAG_ROUND) != 0) {

            result.append(", FLAG_ROUND");

        }

        if ((flags & Display.FLAG_CAN_SHOW_WITH_INSECURE_KEYGUARD) != 0) {

            result.append(", FLAG_CAN_SHOW_WITH_INSECURE_KEYGUARD");

        }

        if ((flags & Display.FLAG_SHOULD_SHOW_SYSTEM_DECORATIONS) != 0) {

            result.append(", FLAG_SHOULD_SHOW_SYSTEM_DECORATIONS");

        }

        if ((flags & Display.FLAG_TRUSTED) != 0) {

            result.append(", FLAG_TRUSTED");

        }

        return result.toString();

    }

}

core/res/AndroidManifest.xml

+4 −0
Original line number Diff line number Diff line
@@ -5026,6 +5026,10 @@ 
    <permission android:name="android.permission.ACCESS_TV_DESCRAMBLER"

        android:protectionLevel="signature|privileged|vendorPrivileged" />



    <!-- Allows an application to create trusted displays. @hide -->

    <permission android:name="android.permission.ADD_TRUSTED_DISPLAY"

                android:protectionLevel="signature" />



    <!-- @hide @SystemApi Allows an application to access locusId events in the usage stats. -->

    <permission android:name="android.permission.ACCESS_LOCUS_ID_USAGE_STATS"

                android:protectionLevel="signature|appPredictor" />