Merge "Remove old getLinks method" (a020374b) · Commits · e / os / android_frameworks_base

core/java/android/view/textclassifier/TextClassifier.java

+0 −21

Original line number	Diff line number	Diff line
		@@ -132,27 +132,6 @@ public interface TextClassifier {
		return TextClassification.EMPTY;
		}

		/**
		* Returns a {@link LinksInfo} that may be applied to the text to annotate it with links
		* information.
		*
		* @param text the text to generate annotations for
		* @param linkMask See {@link android.text.util.Linkify} for a list of linkMasks that may be
		* specified. Subclasses of this interface may specify additional linkMasks
		* @param defaultLocales ordered list of locale preferences that can be used to disambiguate
		* the provided text. If no locale preferences exist, set this to null or an empty locale
		* list in which case the classifier will decide whether to use no locale information, use
		* a default locale, or use the system default.
		*
		* @throws IllegalArgumentException if text is null
		* @hide
		*/
		@WorkerThread
		default LinksInfo getLinks(
		@NonNull CharSequence text, int linkMask, @Nullable LocaleList defaultLocales) {
		return LinksInfo.NO_OP;
		}

		/**
		* Returns a {@link TextLinks} that may be applied to the text to annotate it with links
		* information.

core/java/android/view/textclassifier/TextClassifierImpl.java

+0 −199

Original line number	Diff line number	Diff line
		@@ -30,13 +30,8 @@ import android.os.ParcelFileDescriptor;
		import android.provider.Browser;
		import android.provider.ContactsContract;
		import android.provider.Settings;
		import android.text.Spannable;
		import android.text.TextUtils;
		import android.text.method.WordIterator;
		import android.text.style.ClickableSpan;
		import android.text.util.Linkify;
		import android.util.Patterns;
		import android.view.View;
		import android.widget.TextViewMetrics;

		import com.android.internal.annotations.GuardedBy;
		@@ -46,13 +41,8 @@ import com.android.internal.util.Preconditions;
		import java.io.File;
		import java.io.FileNotFoundException;
		import java.io.IOException;
		import java.text.BreakIterator;
		import java.util.ArrayList;
		import java.util.Collections;
		import java.util.Comparator;
		import java.util.HashMap;
		import java.util.LinkedHashMap;
		import java.util.LinkedList;
		import java.util.List;
		import java.util.Locale;
		import java.util.Map;
		@@ -193,21 +183,6 @@ final class TextClassifierImpl implements TextClassifier {
		new TextClassification.Options().setDefaultLocales(defaultLocales));
		}

		@Override
		public LinksInfo getLinks(
		@NonNull CharSequence text, int linkMask, @Nullable LocaleList defaultLocales) {
		Preconditions.checkArgument(text != null);
		try {
		return LinksInfoFactory.create(
		mContext, getSmartSelection(defaultLocales), text.toString(), linkMask);
		} catch (Throwable t) {
		// Avoid throwing from this method. Log the error.
		Log.e(LOG_TAG, "Error getting links info.", t);
		}
		// Getting here means something went wrong, return a NO_OP result.
		return TextClassifier.NO_OP.getLinks(text, linkMask, defaultLocales);
		}

		@Override
		public TextLinks generateLinks(
		@NonNull CharSequence text, @Nullable TextLinks.Options options) {
		@@ -515,180 +490,6 @@ final class TextClassifierImpl implements TextClassifier {
		Preconditions.checkArgument(endIndex > startIndex);
		}

		/**
		* Detects and creates links for specified text.
		*/
		private static final class LinksInfoFactory {

		private LinksInfoFactory() {}

		public static LinksInfo create(
		Context context, SmartSelection smartSelection, String text, int linkMask) {
		final WordIterator wordIterator = new WordIterator();
		wordIterator.setCharSequence(text, 0, text.length());
		final List<SpanSpec> spans = new ArrayList<>();
		int start = 0;
		int end;
		while ((end = wordIterator.nextBoundary(start)) != BreakIterator.DONE) {
		final String token = text.substring(start, end);
		if (TextUtils.isEmpty(token)) {
		continue;
		}

		final int[] selection = smartSelection.suggest(text, start, end);
		final int selectionStart = selection[0];
		final int selectionEnd = selection[1];
		if (selectionStart >= 0 && selectionEnd <= text.length()
		&& selectionStart <= selectionEnd) {
		final SmartSelection.ClassificationResult[] results =
		smartSelection.classifyText(
		text, selectionStart, selectionEnd,
		getHintFlags(text, selectionStart, selectionEnd));
		if (results.length > 0) {
		final String type = getHighestScoringType(results);
		if (matches(type, linkMask)) {
		// For links without disambiguation, we simply use the default intent.
		final List<Intent> intents = IntentFactory.create(
		context, type, text.substring(selectionStart, selectionEnd));
		if (!intents.isEmpty() && hasActivityHandler(context, intents.get(0))) {
		final ClickableSpan span = createSpan(context, intents.get(0));
		spans.add(new SpanSpec(selectionStart, selectionEnd, span));
		}
		}
		}
		}
		start = end;
		}
		return new LinksInfoImpl(text, avoidOverlaps(spans, text));
		}

		/**
		* Returns true if the classification type matches the specified linkMask.
		*/
		private static boolean matches(String type, int linkMask) {
		type = type.trim().toLowerCase(Locale.ENGLISH);
		if ((linkMask & Linkify.PHONE_NUMBERS) != 0
		&& TextClassifier.TYPE_PHONE.equals(type)) {
		return true;
		}
		if ((linkMask & Linkify.EMAIL_ADDRESSES) != 0
		&& TextClassifier.TYPE_EMAIL.equals(type)) {
		return true;
		}
		if ((linkMask & Linkify.MAP_ADDRESSES) != 0
		&& TextClassifier.TYPE_ADDRESS.equals(type)) {
		return true;
		}
		if ((linkMask & Linkify.WEB_URLS) != 0
		&& TextClassifier.TYPE_URL.equals(type)) {
		return true;
		}
		return false;
		}

		/**
		* Trim the number of spans so that no two spans overlap.
		*
		* This algorithm first ensures that there is only one span per start index, then it
		* makes sure that no two spans overlap.
		*/
		private static List<SpanSpec> avoidOverlaps(List<SpanSpec> spans, String text) {
		Collections.sort(spans, Comparator.comparingInt(span -> span.mStart));
		// Group spans by start index. Take the longest span.
		final Map<Integer, SpanSpec> reps = new LinkedHashMap<>(); // order matters.
		final int size = spans.size();
		for (int i = 0; i < size; i++) {
		final SpanSpec span = spans.get(i);
		final LinksInfoFactory.SpanSpec rep = reps.get(span.mStart);
		if (rep == null \|\| rep.mEnd < span.mEnd) {
		reps.put(span.mStart, span);
		}
		}
		// Avoid span intersections. Take the longer span.
		final LinkedList<SpanSpec> result = new LinkedList<>();
		for (SpanSpec rep : reps.values()) {
		if (result.isEmpty()) {
		result.add(rep);
		continue;
		}

		final SpanSpec last = result.getLast();
		if (rep.mStart < last.mEnd) {
		// Spans intersect. Use the one with characters.
		if ((rep.mEnd - rep.mStart) > (last.mEnd - last.mStart)) {
		result.set(result.size() - 1, rep);
		}
		} else {
		result.add(rep);
		}
		}
		return result;
		}

		private static ClickableSpan createSpan(final Context context, final Intent intent) {
		return new ClickableSpan() {
		// TODO: Style this span.
		@Override
		public void onClick(View widget) {
		context.startActivity(intent);
		}
		};
		}

		private static boolean hasActivityHandler(Context context, Intent intent) {
		if (intent == null) {
		return false;
		}
		final ResolveInfo resolveInfo = context.getPackageManager().resolveActivity(intent, 0);
		return resolveInfo != null && resolveInfo.activityInfo != null;
		}

		/**
		* Implementation of LinksInfo that adds ClickableSpans to the specified text.
		*/
		private static final class LinksInfoImpl implements LinksInfo {

		private final CharSequence mOriginalText;
		private final List<SpanSpec> mSpans;

		LinksInfoImpl(CharSequence originalText, List<SpanSpec> spans) {
		mOriginalText = originalText;
		mSpans = spans;
		}

		@Override
		public boolean apply(@NonNull CharSequence text) {
		Preconditions.checkArgument(text != null);
		if (text instanceof Spannable && mOriginalText.toString().equals(text.toString())) {
		Spannable spannable = (Spannable) text;
		final int size = mSpans.size();
		for (int i = 0; i < size; i++) {
		final SpanSpec span = mSpans.get(i);
		spannable.setSpan(span.mSpan, span.mStart, span.mEnd, 0);
		}
		return true;
		}
		return false;
		}
		}

		/**
		* Span plus its start and end index.
		*/
		private static final class SpanSpec {

		private final int mStart;
		private final int mEnd;
		private final ClickableSpan mSpan;

		SpanSpec(int start, int end, ClickableSpan span) {
		mStart = start;
		mEnd = end;
		mSpan = span;
		}
		}
		}

		/**
		* Creates intents based on the classification type.
		*/