Adding android.icu.text.AlphabeticIndex implementation for AlphabeticIndexCompat (a0a4abe8) · Commits · e / os / android_packages_apps_Trebuchet

src/com/android/launcher3/compat/AlphabeticIndexCompat.java

+155 −102

Original line number	Diff line number	Diff line
		package com.android.launcher3.compat;

		import android.content.Context;
		import android.content.res.Configuration;
		import android.util.Log;

		import com.android.launcher3.Utilities;

		@@ -8,23 +10,79 @@ import java.lang.reflect.Constructor;
		import java.lang.reflect.Method;
		import java.util.Locale;

		/**
		* Fallback class to support Alphabetic indexing if not supported by the framework.
		* TODO(winsonc): disable for non-english locales
		*/
		class BaseAlphabeticIndex {
		public class AlphabeticIndexCompat {
		private static final String TAG = "AlphabeticIndexCompat";

		private static final String BUCKETS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-";
		private static final int UNKNOWN_BUCKET_INDEX = BUCKETS.length() - 1;
		private static final String MID_DOT = "\u2219";
		private final BaseIndex mBaseIndex;
		private final String mDefaultMiscLabel;

		public AlphabeticIndexCompat(Context context) {
		BaseIndex index = null;

		public BaseAlphabeticIndex() {}
		try {
		if (Utilities.isNycOrAbove()) {
		index = new AlphabeticIndexVN(context);
		}
		} catch (Exception e) {
		Log.d(TAG, "Unable to load the system index", e);
		}
		if (index == null) {
		try {
		index = new AlphabeticIndexV16(context);
		} catch (Exception e) {
		Log.d(TAG, "Unable to load the system index", e);
		}
		}

		mBaseIndex = index == null ? new BaseIndex() : index;

		if (context.getResources().getConfiguration().locale
		.getLanguage().equals(Locale.JAPANESE.getLanguage())) {
		// Japanese character 他 ("misc")
		mDefaultMiscLabel = "\u4ed6";
		// TODO(winsonc, omakoto): We need to handle Japanese sections better, especially the kanji
		} else {
		// Dot
		mDefaultMiscLabel = MID_DOT;
		}
		}

		/**
		* Sets the max number of the label buckets in this index.
		* Computes the section name for an given string {@param s}.
		*/
		public void setMaxLabelCount(int count) {
		// Not currently supported
		public String computeSectionName(CharSequence cs) {
		String s = Utilities.trim(cs);
		String sectionName = mBaseIndex.getBucketLabel(mBaseIndex.getBucketIndex(s));
		if (Utilities.trim(sectionName).isEmpty() && s.length() > 0) {
		int c = s.codePointAt(0);
		boolean startsWithDigit = Character.isDigit(c);
		if (startsWithDigit) {
		// Digit section
		return "#";
		} else {
		boolean startsWithLetter = Character.isLetter(c);
		if (startsWithLetter) {
		return mDefaultMiscLabel;
		} else {
		// In languages where these differ, this ensures that we differentiate
		// between the misc section in the native language and a misc section
		// for everything else.
		return MID_DOT;
		}
		}
		}
		return sectionName;
		}

		/**
		* Base class to support Alphabetic indexing if not supported by the framework.
		* TODO(winsonc): disable for non-english locales
		*/
		private static class BaseIndex {

		private static final String BUCKETS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-";
		private static final int UNKNOWN_BUCKET_INDEX = BUCKETS.length() - 1;

		/**
		* Returns the index of the bucket in which the given string should appear.
		@@ -49,124 +107,119 @@ class BaseAlphabeticIndex {
		}

		/**
		* Reflected libcore.icu.AlphabeticIndex implementation, falls back to the base alphabetic index.
		* Reflected libcore.icu.AlphabeticIndex implementation, falls back to the base
		* alphabetic index.
		*/
		public class AlphabeticIndexCompat extends BaseAlphabeticIndex {

		private static final String MID_DOT = "\u2219";
		private static class AlphabeticIndexV16 extends BaseIndex {

		private Object mAlphabeticIndex;
		private Method mAddLabelsMethod;
		private Method mSetMaxLabelCountMethod;
		private Method mGetBucketIndexMethod;
		private Method mGetBucketLabelMethod;
		private boolean mHasValidAlphabeticIndex;
		private String mDefaultMiscLabel;

		@SuppressWarnings({"unchecked", "rawtypes"})
		public AlphabeticIndexCompat(Context context) {
		super();
		try {
		public AlphabeticIndexV16(Context context) throws Exception {
		Locale curLocale = context.getResources().getConfiguration().locale;
		Class clazz = Class.forName("libcore.icu.AlphabeticIndex");
		Constructor ctor = clazz.getConstructor(Locale.class);
		mAddLabelsMethod = clazz.getDeclaredMethod("addLabels", Locale.class);
		mSetMaxLabelCountMethod = clazz.getDeclaredMethod("setMaxLabelCount", int.class);
		mGetBucketIndexMethod = clazz.getDeclaredMethod("getBucketIndex", String.class);
		mGetBucketLabelMethod = clazz.getDeclaredMethod("getBucketLabel", int.class);
		mAlphabeticIndex = ctor.newInstance(curLocale);
		try {
		// Ensure we always have some base English locale buckets
		mAlphabeticIndex = clazz.getConstructor(Locale.class).newInstance(curLocale);

		if (!curLocale.getLanguage().equals(Locale.ENGLISH.getLanguage())) {
		mAddLabelsMethod.invoke(mAlphabeticIndex, Locale.ENGLISH);
		clazz.getDeclaredMethod("addLabels", Locale.class)
		.invoke(mAlphabeticIndex, Locale.ENGLISH);
		}
		} catch (Exception e) {
		e.printStackTrace();
		}
		if (curLocale.getLanguage().equals(Locale.JAPANESE.getLanguage())) {
		// Japanese character 他 ("misc")
		mDefaultMiscLabel = "\u4ed6";
		// TODO(winsonc, omakoto): We need to handle Japanese sections better, especially the kanji
		} else {
		// Dot
		mDefaultMiscLabel = MID_DOT;
		}
		mHasValidAlphabeticIndex = true;

		/**
		* Returns the index of the bucket in which {@param s} should appear.
		* Function is synchronized because underlying routine walks an iterator
		* whose state is maintained inside the index object.
		*/
		protected int getBucketIndex(String s) {
		try {
		return (Integer) mGetBucketIndexMethod.invoke(mAlphabeticIndex, s);
		} catch (Exception e) {
		mHasValidAlphabeticIndex = false;
		e.printStackTrace();
		}
		return super.getBucketIndex(s);
		}

		/**
		* Sets the max number of the label buckets in this index.
		* (ICU 51 default is 99)
		* Returns the label for the bucket at the given index (as returned by getBucketIndex).
		*/
		public void setMaxLabelCount(int count) {
		if (mHasValidAlphabeticIndex) {
		protected String getBucketLabel(int index) {
		try {
		mSetMaxLabelCountMethod.invoke(mAlphabeticIndex, count);
		return (String) mGetBucketLabelMethod.invoke(mAlphabeticIndex, index);
		} catch (Exception e) {
		e.printStackTrace();
		}
		} else {
		super.setMaxLabelCount(count);
		return super.getBucketLabel(index);
		}
		}

		/**
		* Computes the section name for an given string {@param s}.
		* Reflected android.icu.text.AlphabeticIndex implementation, falls back to the base
		* alphabetic index.
		*/
		public String computeSectionName(CharSequence cs) {
		String s = Utilities.trim(cs);
		String sectionName = getBucketLabel(getBucketIndex(s));
		if (Utilities.trim(sectionName).isEmpty() && s.length() > 0) {
		int c = s.codePointAt(0);
		boolean startsWithDigit = Character.isDigit(c);
		if (startsWithDigit) {
		// Digit section
		return "#";
		} else {
		boolean startsWithLetter = Character.isLetter(c);
		if (startsWithLetter) {
		return mDefaultMiscLabel;
		} else {
		// In languages where these differ, this ensures that we differentiate
		// between the misc section in the native language and a misc section
		// for everything else.
		return MID_DOT;
		}
		}
		private static class AlphabeticIndexVN extends BaseIndex {

		private Object mAlphabeticIndex;
		private Method mGetBucketIndexMethod;

		private Method mGetBucketMethod;
		private Method mGetLabelMethod;

		public AlphabeticIndexVN(Context context) throws Exception {
		// TODO: Replace this with locale list once available.
		Object locales = Configuration.class.getDeclaredMethod("getLocales").invoke(
		context.getResources().getConfiguration());
		int localeCount = (Integer) locales.getClass().getDeclaredMethod("size").invoke(locales);
		Method localeGetter = locales.getClass().getDeclaredMethod("get", int.class);
		Locale primaryLocale = localeCount == 0 ? Locale.ENGLISH :
		(Locale) localeGetter.invoke(locales, 0);

		Class clazz = Class.forName("android.icu.text.AlphabeticIndex");
		mAlphabeticIndex = clazz.getConstructor(Locale.class).newInstance(primaryLocale);

		Method addLocales = clazz.getDeclaredMethod("addLabels", Locale[].class);
		for (int i = 1; i < localeCount; i++) {
		Locale l = (Locale) localeGetter.invoke(locales, i);
		addLocales.invoke(mAlphabeticIndex, new Object[]{ new Locale[] {l}});
		}
		return sectionName;
		addLocales.invoke(mAlphabeticIndex, new Object[]{ new Locale[] {Locale.ENGLISH}});

		mAlphabeticIndex = mAlphabeticIndex.getClass()
		.getDeclaredMethod("buildImmutableIndex")
		.invoke(mAlphabeticIndex);

		mGetBucketIndexMethod = mAlphabeticIndex.getClass().getDeclaredMethod(
		"getBucketIndex", CharSequence.class);
		mGetBucketMethod = mAlphabeticIndex.getClass().getDeclaredMethod("getBucket", int.class);
		mGetLabelMethod = mGetBucketMethod.getReturnType().getDeclaredMethod("getLabel");
		}

		/**
		* Returns the index of the bucket in which {@param s} should appear.
		* Function is synchronized because underlying routine walks an iterator
		* whose state is maintained inside the index object.
		*/
		protected int getBucketIndex(String s) {
		if (mHasValidAlphabeticIndex) {
		try {
		return (Integer) mGetBucketIndexMethod.invoke(mAlphabeticIndex, s);
		} catch (Exception e) {
		e.printStackTrace();
		}
		}
		return super.getBucketIndex(s);
		}

		/**
		* Returns the label for the bucket at the given index (as returned by getBucketIndex).
		* Returns the label for the bucket at the given index
		*/
		protected String getBucketLabel(int index) {
		if (mHasValidAlphabeticIndex) {
		try {
		return (String) mGetBucketLabelMethod.invoke(mAlphabeticIndex, index);
		return (String) mGetLabelMethod.invoke(
		mGetBucketMethod.invoke(mAlphabeticIndex, index));
		} catch (Exception e) {
		e.printStackTrace();
		}
		}
		return super.getBucketLabel(index);
		}
		}
		}