add reconstructBigramFrequency (c0a75c8e) · Commits · e / os / android_packages_inputmethods_LatinIME

java/src/com/android/inputmethod/latin/UserHistoryDictionary.java

+7 −8

Original line number	Diff line number	Diff line
		@@ -52,14 +52,14 @@ public class UserHistoryDictionary extends ExpandableDictionary {
		private static final int FREQUENCY_FOR_TYPED = 2;

		/** Maximum number of pairs. Pruning will start when databases goes above this number. */
		private static int sMaxHistoryBigrams = 10000;
		public static final int sMaxHistoryBigrams = 10000;

		/**
		* When it hits maximum bigram pair, it will delete until you are left with
		* only (sMaxHistoryBigrams - sDeleteHistoryBigrams) pairs.
		* Do not keep this number small to avoid deleting too often.
		*/
		private static int sDeleteHistoryBigrams = 1000;
		public static final int sDeleteHistoryBigrams = 1000;

		/**
		* Database version should increase if the database structure changes
		@@ -109,12 +109,8 @@ public class UserHistoryDictionary extends ExpandableDictionary {

		private static DatabaseHelper sOpenHelper = null;

		public void setDatabaseMax(int maxHistoryBigram) {
		sMaxHistoryBigrams = maxHistoryBigram;
		}

		public void setDatabaseDelete(int deleteHistoryBigram) {
		sDeleteHistoryBigrams = deleteHistoryBigram;
		public String getLocale() {
		return mLocale;
		}

		public synchronized static UserHistoryDictionary getInstance(
		@@ -502,9 +498,11 @@ public class UserHistoryDictionary extends ExpandableDictionary {
		needsToSave(fc, isValid, addLevel0Bigram)) {
		freq = fc;
		} else {
		// Delete this entry
		freq = -1;
		}
		} else {
		// Delete this entry
		freq = -1;
		}
		}
		@@ -541,6 +539,7 @@ public class UserHistoryDictionary extends ExpandableDictionary {
		getContentValues(word1, word2, mLocale));
		pairId = pairIdLong.intValue();
		}
		// Eliminate freq == 0 because that word is profanity.
		if (freq > 0) {
		if (PROFILE_SAVE_RESTORE) {
		++profInsert;

java/src/com/android/inputmethod/latin/makedict/BinaryDictInputOutput.java

+18 −0

Original line number	Diff line number	Diff line
		@@ -1410,4 +1410,22 @@ public class BinaryDictInputOutput {
		return false;
		}
		}

		/**
		* Calculate bigram frequency from compressed value
		*
		* @see #makeBigramFlags
		*
		* @param unigramFrequency
		* @param bigramFrequency compressed frequency
		* @return approximate bigram frequency
		*/
		public static int reconstructBigramFrequency(final int unigramFrequency,
		final int bigramFrequency) {
		final float stepSize = (MAX_TERMINAL_FREQUENCY - unigramFrequency)
		/ (1.5f + MAX_BIGRAM_FREQUENCY);
		final float resultFreqFloat = (float)unigramFrequency
		+ stepSize * (bigramFrequency + 1.0f);
		return (int)resultFreqFloat;
		}
		}