Scribe in IMF: Handwriting support API 1/N

Introduce new API for declaring Scribe support in IMEs.

CTS-Coverage-Bug: 210917621
Bug: 203086136

Change-Id: Ie012d865d58e6d41fe6ab6de479dd6ed86e6106c

core/api/current.txt

@@ -1420,6 +1420,7 @@ package android {
     field public static final int supportsMultipleDisplays = 16844182; // 0x1010596
     field public static final int supportsPictureInPicture = 16844023; // 0x10104f7
     field public static final int supportsRtl = 16843695; // 0x10103af
+    field public static final int supportsStylusHandwriting;
     field public static final int supportsSwitchingToNextInputMethod = 16843755; // 0x10103eb
     field public static final int supportsUploading = 16843419; // 0x101029b
     field public static final int suppressesSpellChecker = 16844355; // 0x1010643
@@ -52832,6 +52833,7 @@ package android.view.inputmethod {
     method public android.graphics.drawable.Drawable loadIcon(android.content.pm.PackageManager);
     method public CharSequence loadLabel(android.content.pm.PackageManager);
     method public boolean shouldShowInInputMethodPicker();
+    method public boolean supportsStylusHandwriting();
     method public boolean suppressesSpellChecker();
     method public void writeToParcel(android.os.Parcel, int);
     field @NonNull public static final android.os.Parcelable.Creator<android.view.inputmethod.InputMethodInfo> CREATOR;

core/java/android/view/inputmethod/InputMethodInfo.java

@@ -140,6 +140,12 @@ public final class InputMethodInfo implements Parcelable {
      */
     private final int mHandledConfigChanges;
 
+    /**
+     * The flag whether this IME supports Handwriting using stylus input.
+     */
+    private final boolean mSupportsStylusHandwriting;
+
+
     /**
      * @param service the {@link ResolveInfo} corresponds in which the IME is implemented.
      * @return a unique ID to be returned by {@link #getId()}. We have used
@@ -234,6 +240,8 @@ public final class InputMethodInfo implements Parcelable {
                     com.android.internal.R.styleable.InputMethod_showInInputMethodPicker, true);
             mHandledConfigChanges = sa.getInt(
                     com.android.internal.R.styleable.InputMethod_configChanges, 0);
+            mSupportsStylusHandwriting = sa.getBoolean(
+                    com.android.internal.R.styleable.InputMethod_supportsStylusHandwriting, false);
             sa.recycle();
 
             final int depth = parser.getDepth();
@@ -323,6 +331,7 @@ public final class InputMethodInfo implements Parcelable {
         mService = ResolveInfo.CREATOR.createFromParcel(source);
         mSubtypes = new InputMethodSubtypeArray(source);
         mHandledConfigChanges = source.readInt();
+        mSupportsStylusHandwriting = source.readBoolean();
         mForceDefault = false;
     }
 
@@ -335,7 +344,7 @@ public final class InputMethodInfo implements Parcelable {
                 settingsActivity, null /* subtypes */, 0 /* isDefaultResId */,
                 false /* forceDefault */, true /* supportsSwitchingToNextInputMethod */,
                 false /* inlineSuggestionsEnabled */, false /* isVrOnly */,
-                0 /* handledConfigChanges */);
+                0 /* handledConfigChanges */, false /* supportsStylusHandwriting */);
     }
 
     /**
@@ -349,7 +358,8 @@ public final class InputMethodInfo implements Parcelable {
         this(buildFakeResolveInfo(packageName, className, label), false /* isAuxIme */,
                 settingsActivity, null /* subtypes */, 0 /* isDefaultResId */,
                 false /* forceDefault */, true /* supportsSwitchingToNextInputMethod */,
-                false /* inlineSuggestionsEnabled */, false /* isVrOnly */, handledConfigChanges);
+                false /* inlineSuggestionsEnabled */, false /* isVrOnly */, handledConfigChanges,
+                false /* supportsStylusHandwriting */);
     }
 
     /**
@@ -361,7 +371,8 @@ public final class InputMethodInfo implements Parcelable {
             boolean forceDefault) {
         this(ri, isAuxIme, settingsActivity, subtypes, isDefaultResId, forceDefault,
                 true /* supportsSwitchingToNextInputMethod */, false /* inlineSuggestionsEnabled */,
-                false /* isVrOnly */, 0 /* handledconfigChanges */);
+                false /* isVrOnly */, 0 /* handledconfigChanges */,
+                false /* supportsStylusHandwriting */);
     }
 
     /**
@@ -373,7 +384,7 @@ public final class InputMethodInfo implements Parcelable {
             boolean supportsSwitchingToNextInputMethod, boolean isVrOnly) {
         this(ri, isAuxIme, settingsActivity, subtypes, isDefaultResId, forceDefault,
                 supportsSwitchingToNextInputMethod, false /* inlineSuggestionsEnabled */, isVrOnly,
-                0 /* handledConfigChanges */);
+                0 /* handledConfigChanges */, false /* supportsStylusHandwriting */);
     }
 
     /**
@@ -383,7 +394,7 @@ public final class InputMethodInfo implements Parcelable {
     public InputMethodInfo(ResolveInfo ri, boolean isAuxIme, String settingsActivity,
             List<InputMethodSubtype> subtypes, int isDefaultResId, boolean forceDefault,
             boolean supportsSwitchingToNextInputMethod, boolean inlineSuggestionsEnabled,
-            boolean isVrOnly, int handledConfigChanges) {
+            boolean isVrOnly, int handledConfigChanges, boolean supportsStylusHandwriting) {
         final ServiceInfo si = ri.serviceInfo;
         mService = ri;
         mId = new ComponentName(si.packageName, si.name).flattenToShortString();
@@ -398,6 +409,7 @@ public final class InputMethodInfo implements Parcelable {
         mShowInInputMethodPicker = true;
         mIsVrOnly = isVrOnly;
         mHandledConfigChanges = handledConfigChanges;
+        mSupportsStylusHandwriting = supportsStylusHandwriting;
     }
 
     private static ResolveInfo buildFakeResolveInfo(String packageName, String className,
@@ -556,6 +568,14 @@ public final class InputMethodInfo implements Parcelable {
         return mHandledConfigChanges;
     }
 
+    /**
+     * Returns if IME supports handwriting using stylus input.
+     * @attr ref android.R.styleable#InputMethod_supportsStylusHandwriting
+     */
+    public boolean supportsStylusHandwriting() {
+        return mSupportsStylusHandwriting;
+    }
+
     public void dump(Printer pw, String prefix) {
         pw.println(prefix + "mId=" + mId
                 + " mSettingsActivityName=" + mSettingsActivityName
@@ -563,7 +583,8 @@ public final class InputMethodInfo implements Parcelable {
                 + " mSupportsSwitchingToNextInputMethod=" + mSupportsSwitchingToNextInputMethod
                 + " mInlineSuggestionsEnabled=" + mInlineSuggestionsEnabled
                 + " mSuppressesSpellChecker=" + mSuppressesSpellChecker
-                + " mShowInInputMethodPicker=" + mShowInInputMethodPicker);
+                + " mShowInInputMethodPicker=" + mShowInInputMethodPicker
+                + " mSupportsStylusHandwriting=" + mSupportsStylusHandwriting);
         pw.println(prefix + "mIsDefaultResId=0x"
                 + Integer.toHexString(mIsDefaultResId));
         pw.println(prefix + "Service:");
@@ -667,6 +688,7 @@ public final class InputMethodInfo implements Parcelable {
         mService.writeToParcel(dest, flags);
         mSubtypes.writeToParcel(dest);
         dest.writeInt(mHandledConfigChanges);
+        dest.writeBoolean(mSupportsStylusHandwriting);
     }
 
     /**

core/res/res/values/attrs.xml

@@ -3638,6 +3638,9 @@
              to re-retrieve all resources (including view layouts, drawables, etc)
              to correctly handle any configuration change.-->
         <attr name="configChanges" />
+        <!-- Specifies whether the IME supports Handwriting using stylus. Defaults to false. -->
+        <attr name="supportsStylusHandwriting" format="boolean" />
+
     </declare-styleable>
 
     <!-- This is the subtype of InputMethod. Subtype can describe locales (for example, en_US and

core/res/res/values/public.xml

@@ -3249,6 +3249,7 @@
     <public name="canDisplayOnRemoteDevices" />
     <public name="supportedTypes" />
     <public name="resetEnabledSettingsOnAppDataCleared" />
+    <public name="supportsStylusHandwriting" />
   </staging-public-group>
 
   <staging-public-group type="id" first-id="0x01de0000">

services/core/java/com/android/server/inputmethod/InputMethodBindingController.java

@@ -82,6 +82,7 @@ final class InputMethodBindingController {
     private IBinder mCurToken;
     private int mCurSeq;
     private boolean mVisibleBound;
+    private boolean mSupportsStylusHw;
 
     /**
      * Binding flags for establishing connection to the {@link InputMethodService}.
@@ -295,6 +296,10 @@ final class InputMethodBindingController {
                     mService.scheduleNotifyImeUidToAudioService(mCurMethodUid);
                     mService.reRequestCurrentClientSessionLocked();
                 }
+                mSupportsStylusHw = mMethodMap.get(mSelectedMethodId).supportsStylusHandwriting();
+                if (mSupportsStylusHw) {
+                    // TODO init Handwriting spy.
+                }
             }
             Trace.traceEnd(TRACE_TAG_WINDOW_MANAGER);
         }