private static void dumpNode(StringBuilder builder, String prefix, ViewNode node, int childNumber) {
    builder.append(prefix)
            .append("child #").append(childNumber).append("\n");

    builder.append(prefix)
            .append("autoFillId: ").append(node.getAutofillId())
            .append("\tidEntry: ").append(node.getIdEntry())
            .append("\tid: ").append(node.getId())
            .append("\tclassName: ").append(node.getClassName())
            .append('\n');

    builder.append(prefix)
            .append("focused: ").append(node.isFocused())
            .append("\tvisibility").append(node.getVisibility())
            .append("\tchecked: ").append(node.isChecked())
            .append("\twebDomain: ").append(node.getWebDomain())
            .append("\thint: ").append(node.getHint())
            .append('\n');

    HtmlInfo htmlInfo = node.getHtmlInfo();

    if (htmlInfo != null) {
        builder.append(prefix)
                .append("HTML TAG: ").append(htmlInfo.getTag())
                .append(" attrs: ").append(htmlInfo.getAttributes())
                .append('\n');
    }

    String[] afHints = node.getAutofillHints();
    CharSequence[] options = node.getAutofillOptions();
    builder.append(prefix).append("afType: ").append(getTypeAsString(node.getAutofillType()))
            .append("\tafValue:")
            .append(getAutofillValueAndTypeAsString(node.getAutofillValue()))
            .append("\tafOptions:").append(options == null ? "N/A" : Arrays.toString(options))
            .append("\tafHints: ").append(afHints == null ? "N/A" : Arrays.toString(afHints))
            .append("\tinputType:").append(node.getInputType())
            .append('\n');

    int numberChildren = node.getChildCount();
    builder.append(prefix).append("# children: ").append(numberChildren)
            .append("\ttext: ").append(node.getText())
            .append('\n');

    final String prefix2 = prefix + "  ";
    for (int i = 0; i < numberChildren; i++) {
        dumpNode(builder, prefix2, node.getChildAt(i), i);
    }
    logv(builder.toString());
}
 

private static void dumpNode(String prefix, ViewNode node) {
    StringBuilder builder = new StringBuilder();
    builder.append(prefix)
            .append("autoFillId: ").append(node.getAutofillId())
            .append("\tidEntry: ").append(node.getIdEntry())
            .append("\tid: ").append(node.getId())
            .append("\tclassName: ").append(node.getClassName())
            .append('\n');

    builder.append(prefix)
            .append("focused: ").append(node.isFocused())
            .append("\tvisibility").append(node.getVisibility())
            .append("\tchecked: ").append(node.isChecked())
            .append("\twebDomain: ").append(node.getWebDomain())
            .append("\thint: ").append(node.getHint())
            .append('\n');

    HtmlInfo htmlInfo = node.getHtmlInfo();

    if (htmlInfo != null) {
        builder.append(prefix)
                .append("HTML TAG: ").append(htmlInfo.getTag())
                .append(" attrs: ").append(htmlInfo.getAttributes())
                .append('\n');
    }

    String[] afHints = node.getAutofillHints();
    CharSequence[] options = node.getAutofillOptions();
    builder.append(prefix).append("afType: ").append(getAutofillTypeAsString(node.getAutofillType()))
            .append("\tafValue:")
            .append(getAutofillValueAndTypeAsString(node.getAutofillValue()))
            .append("\tafOptions:").append(options == null ? "N/A" : Arrays.toString(options))
            .append("\tafHints: ").append(afHints == null ? "N/A" : Arrays.toString(afHints))
            .append("\tinputType:").append(node.getInputType())
            .append('\n');

    int numberChildren = node.getChildCount();
    builder.append(prefix).append("# children: ").append(numberChildren)
            .append("\ttext: ").append(node.getText())
            .append('\n');

    Log.v(TAG, builder.toString());
    final String prefix2 = prefix + "  ";
    for (int i = 0; i < numberChildren; i++) {
        Log.v(TAG, prefix + "child #" + i);
        dumpNode(prefix2, node.getChildAt(i));
    }
}
 

ViewNode(ParcelTransferReader reader, int nestingLevel) {
    final Parcel in = reader.readParcel(VALIDATE_VIEW_TOKEN, nestingLevel);
    reader.mNumReadViews++;
    final PooledStringReader preader = reader.mStringReader;
    mClassName = preader.readString();
    mFlags = in.readInt();
    final int flags = mFlags;
    if ((flags&FLAGS_HAS_ID) != 0) {
        mId = in.readInt();
        if (mId != View.NO_ID) {
            mIdEntry = preader.readString();
            if (mIdEntry != null) {
                mIdType = preader.readString();
                mIdPackage = preader.readString();
            }
        }
    }

    if ((flags&FLAGS_HAS_AUTOFILL_DATA) != 0) {
        mSanitized = in.readInt() == 1;
        mAutofillId = in.readParcelable(null);
        mAutofillType = in.readInt();
        mAutofillHints = in.readStringArray();
        mAutofillValue = in.readParcelable(null);
        mAutofillOptions = in.readCharSequenceArray();
        final Parcelable p = in.readParcelable(null);
        if (p instanceof HtmlInfo) {
            mHtmlInfo = (HtmlInfo) p;
        }
        mMinEms = in.readInt();
        mMaxEms = in.readInt();
        mMaxLength = in.readInt();
        mTextIdEntry = preader.readString();
        mImportantForAutofill = in.readInt();
    }
    if ((flags&FLAGS_HAS_LARGE_COORDS) != 0) {
        mX = in.readInt();
        mY = in.readInt();
        mWidth = in.readInt();
        mHeight = in.readInt();
    } else {
        int val = in.readInt();
        mX = val&0x7fff;
        mY = (val>>16)&0x7fff;
        val = in.readInt();
        mWidth = val&0x7fff;
        mHeight = (val>>16)&0x7fff;
    }
    if ((flags&FLAGS_HAS_SCROLL) != 0) {
        mScrollX = in.readInt();
        mScrollY = in.readInt();
    }
    if ((flags&FLAGS_HAS_MATRIX) != 0) {
        mMatrix = new Matrix();
        in.readFloatArray(reader.mTmpMatrix);
        mMatrix.setValues(reader.mTmpMatrix);
    }
    if ((flags&FLAGS_HAS_ELEVATION) != 0) {
        mElevation = in.readFloat();
    }
    if ((flags&FLAGS_HAS_ALPHA) != 0) {
        mAlpha = in.readFloat();
    }
    if ((flags&FLAGS_HAS_CONTENT_DESCRIPTION) != 0) {
        mContentDescription = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
    }
    if ((flags&FLAGS_HAS_TEXT) != 0) {
        mText = new ViewNodeText(in, (flags&FLAGS_HAS_COMPLEX_TEXT) == 0);
    }
    if ((flags&FLAGS_HAS_INPUT_TYPE) != 0) {
        mInputType = in.readInt();
    }
    if ((flags&FLAGS_HAS_URL) != 0) {
        mWebScheme = in.readString();
        mWebDomain = in.readString();
    }
    if ((flags&FLAGS_HAS_LOCALE_LIST) != 0) {
        mLocaleList = in.readParcelable(null);
    }
    if ((flags&FLAGS_HAS_EXTRAS) != 0) {
        mExtras = in.readBundle();
    }
    if ((flags&FLAGS_HAS_CHILDREN) != 0) {
        final int NCHILDREN = in.readInt();
        if (DEBUG_PARCEL_TREE || DEBUG_PARCEL_CHILDREN) Log.d(TAG,
                "Preparing to read " + NCHILDREN
                        + " children: @ #" + reader.mNumReadViews
                        + ", level " + nestingLevel);
        mChildren = new ViewNode[NCHILDREN];
        for (int i=0; i<NCHILDREN; i++) {
            mChildren[i] = new ViewNode(reader, nestingLevel + 1);
        }
    }
}
 

@Override
public HtmlInfo.Builder newHtmlInfoBuilder(@NonNull String tagName) {
    return new HtmlInfoNodeBuilder(tagName);
}
 

@Override
public void setHtmlInfo(@NonNull HtmlInfo htmlInfo) {
    mNode.mHtmlInfo = htmlInfo;
}
 

void dump(String prefix, ViewNode node, boolean showSensitive) {
    Log.i(TAG, prefix + "View [" + node.getLeft() + "," + node.getTop()
            + " " + node.getWidth() + "x" + node.getHeight() + "]" + " " + node.getClassName());
    int id = node.getId();
    if (id != 0) {
        StringBuilder sb = new StringBuilder();
        sb.append(prefix); sb.append("  ID: #"); sb.append(Integer.toHexString(id));
        String entry = node.getIdEntry();
        if (entry != null) {
            String type = node.getIdType();
            String pkg = node.getIdPackage();
            sb.append(" "); sb.append(pkg); sb.append(":"); sb.append(type);
            sb.append("/"); sb.append(entry);
        }
        Log.i(TAG, sb.toString());
    }
    int scrollX = node.getScrollX();
    int scrollY = node.getScrollY();
    if (scrollX != 0 || scrollY != 0) {
        Log.i(TAG, prefix + "  Scroll: " + scrollX + "," + scrollY);
    }
    Matrix matrix = node.getTransformation();
    if (matrix != null) {
        Log.i(TAG, prefix + "  Transformation: " + matrix);
    }
    float elevation = node.getElevation();
    if (elevation != 0) {
        Log.i(TAG, prefix + "  Elevation: " + elevation);
    }
    float alpha = node.getAlpha();
    if (alpha != 0) {
        Log.i(TAG, prefix + "  Alpha: " + elevation);
    }
    CharSequence contentDescription = node.getContentDescription();
    if (contentDescription != null) {
        Log.i(TAG, prefix + "  Content description: " + contentDescription);
    }
    CharSequence text = node.getText();
    if (text != null) {
        final String safeText = node.isSanitized() || showSensitive ? text.toString()
                : "REDACTED[" + text.length() + " chars]";
        Log.i(TAG, prefix + "  Text (sel " + node.getTextSelectionStart() + "-"
                + node.getTextSelectionEnd() + "): " + safeText);
        Log.i(TAG, prefix + "  Text size: " + node.getTextSize() + " , style: #"
                + node.getTextStyle());
        Log.i(TAG, prefix + "  Text color fg: #" + Integer.toHexString(node.getTextColor())
                + ", bg: #" + Integer.toHexString(node.getTextBackgroundColor()));
        Log.i(TAG, prefix + "  Input type: " + node.getInputType());
        Log.i(TAG, prefix + "  Resource id: " + node.getTextIdEntry());
    }
    String webDomain = node.getWebDomain();
    if (webDomain != null) {
        Log.i(TAG, prefix + "  Web domain: " + webDomain);
    }
    HtmlInfo htmlInfo = node.getHtmlInfo();
    if (htmlInfo != null) {
        Log.i(TAG, prefix + "  HtmlInfo: tag=" + htmlInfo.getTag()
                + ", attr="+ htmlInfo.getAttributes());
    }

    LocaleList localeList = node.getLocaleList();
    if (localeList != null) {
        Log.i(TAG, prefix + "  LocaleList: " + localeList);
    }
    String hint = node.getHint();
    if (hint != null) {
        Log.i(TAG, prefix + "  Hint: " + hint);
    }
    Bundle extras = node.getExtras();
    if (extras != null) {
        Log.i(TAG, prefix + "  Extras: " + extras);
    }
    if (node.isAssistBlocked()) {
        Log.i(TAG, prefix + "  BLOCKED");
    }
    AutofillId autofillId = node.getAutofillId();
    if (autofillId == null) {
        Log.i(TAG, prefix + " NO autofill ID");
    } else {
        Log.i(TAG, prefix + "Autofill info: id= " + autofillId
                + ", type=" + node.getAutofillType()
                + ", options=" + Arrays.toString(node.getAutofillOptions())
                + ", hints=" + Arrays.toString(node.getAutofillHints())
                + ", value=" + node.getAutofillValue()
                + ", sanitized=" + node.isSanitized()
                + ", importantFor=" + node.getImportantForAutofill());
    }

    final int NCHILDREN = node.getChildCount();
    if (NCHILDREN > 0) {
        Log.i(TAG, prefix + "  Children:");
        String cprefix = prefix + "    ";
        for (int i=0; i<NCHILDREN; i++) {
            ViewNode cnode = node.getChildAt(i);
            dump(cprefix, cnode, showSensitive);
        }
    }
}
 

private static void dumpNode(StringBuilder builder, String prefix, ViewNode node, int childNumber) {
    builder.append(prefix)
            .append("child #").append(childNumber).append("\n");

    builder.append(prefix)
            .append("autoFillId: ").append(node.getAutofillId())
            .append("\tidEntry: ").append(node.getIdEntry())
            .append("\tid: ").append(node.getId())
            .append("\tclassName: ").append(node.getClassName())
            .append('\n');

    builder.append(prefix)
            .append("focused: ").append(node.isFocused())
            .append("\tvisibility").append(node.getVisibility())
            .append("\tchecked: ").append(node.isChecked())
            .append("\twebDomain: ").append(node.getWebDomain())
            .append("\thint: ").append(node.getHint())
            .append('\n');

    HtmlInfo htmlInfo = node.getHtmlInfo();

    if (htmlInfo != null) {
        builder.append(prefix)
                .append("HTML TAG: ").append(htmlInfo.getTag())
                .append(" attrs: ").append(htmlInfo.getAttributes())
                .append('\n');
    }

    String[] afHints = node.getAutofillHints();
    CharSequence[] options = node.getAutofillOptions();
    builder.append(prefix).append("afType: ").append(getTypeAsString(node.getAutofillType()))
            .append("\tafValue:")
            .append(getAutofillValueAndTypeAsString(node.getAutofillValue()))
            .append("\tafOptions:").append(options == null ? "N/A" : Arrays.toString(options))
            .append("\tafHints: ").append(afHints == null ? "N/A" : Arrays.toString(afHints))
            .append("\tinputType:").append(node.getInputType())
            .append('\n');

    int numberChildren = node.getChildCount();
    builder.append(prefix).append("# children: ").append(numberChildren)
            .append("\ttext: ").append(node.getText())
            .append('\n');

    final String prefix2 = prefix + "  ";
    for (int i = 0; i < numberChildren; i++) {
        dumpNode(builder, prefix2, node.getChildAt(i), i);
    }
    logv(builder.toString());
}
 

private static void dumpNode(String prefix, ViewNode node) {
    StringBuilder builder = new StringBuilder();
    builder.append(prefix)
            .append("autoFillId: ").append(node.getAutofillId())
            .append("\tidEntry: ").append(node.getIdEntry())
            .append("\tid: ").append(node.getId())
            .append("\tclassName: ").append(node.getClassName())
            .append('\n');

    builder.append(prefix)
            .append("focused: ").append(node.isFocused())
            .append("\tvisibility").append(node.getVisibility())
            .append("\tchecked: ").append(node.isChecked())
            .append("\twebDomain: ").append(node.getWebDomain())
            .append("\thint: ").append(node.getHint())
            .append('\n');

    HtmlInfo htmlInfo = node.getHtmlInfo();

    if (htmlInfo != null) {
        builder.append(prefix)
                .append("HTML TAG: ").append(htmlInfo.getTag())
                .append(" attrs: ").append(htmlInfo.getAttributes())
                .append('\n');
    }

    String[] afHints = node.getAutofillHints();
    CharSequence[] options = node.getAutofillOptions();
    builder.append(prefix).append("afType: ").append(getAutofillTypeAsString(node.getAutofillType()))
            .append("\tafValue:")
            .append(getAutofillValueAndTypeAsString(node.getAutofillValue()))
            .append("\tafOptions:").append(options == null ? "N/A" : Arrays.toString(options))
            .append("\tafHints: ").append(afHints == null ? "N/A" : Arrays.toString(afHints))
            .append("\tinputType:").append(node.getInputType())
            .append('\n');

    int numberChildren = node.getChildCount();
    builder.append(prefix).append("# children: ").append(numberChildren)
            .append("\ttext: ").append(node.getText())
            .append('\n');

    Log.v(TAG, builder.toString());
    final String prefix2 = prefix + "  ";
    for (int i = 0; i < numberChildren; i++) {
        Log.v(TAG, prefix + "child #" + i);
        dumpNode(prefix2, node.getChildAt(i));
    }
}
 

/**
 * Creates a new {@link HtmlInfo.Builder} for the given HTML tag.
 *
 * @param tagName name of the HTML tag.
 * @return a new builder.
 */
public abstract HtmlInfo.Builder newHtmlInfoBuilder(@NonNull String tagName);
 

/**
 * Sets the HTML properties of this node when it represents an HTML element.
 *
 * <p>Should only be set when the node is used for autofill purposes - it will be ignored
 * when used for assist.
 *
 * @param htmlInfo HTML properties.
 */
public abstract void setHtmlInfo(@NonNull HtmlInfo htmlInfo);
 

/**
 * Builds the {@link HtmlInfo} object.
 *
 * @return a new {@link HtmlInfo} instance.
 */
public abstract HtmlInfo build();
 

/**
 * Returns the HTML properties associated with this view.
 *
 * <p>It's only relevant when the {@link AssistStructure} is used for autofill purposes,
 * not for assist purposes.
 *
 * @return the HTML properties associated with this view, or {@code null} if the
 * structure was created for assist purposes.
 */
@Nullable public HtmlInfo getHtmlInfo() {
    return mHtmlInfo;
}