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Search optimizations

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M66B
2022-09-30 09:42:37 +02:00
parent b2c1badfcb
commit 2e58059bca
2 changed files with 38 additions and 33 deletions
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9
app/src/main/java/eu/faircode/email/Fts4DbHelper.java
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@@ -134,13 +134,18 @@ public class Fts4DbHelper extends SQLiteOpenHelper {
db.delete("message", "rowid = ?", new String[]{Long.toString(id)});
}
static String breakText(String text) {
private static String breakText(String text) {
if (TextUtils.isEmpty(text))
return "";
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N)
return text;
// https://www.sqlite.org/fts3.html#tokenizer
text = Normalizer.normalize(text.toLowerCase(), Normalizer.Form.NFKD)
.replaceAll("[\\p{InCombiningDiacriticalMarks}]", "");
StringBuilder sb = new StringBuilder();
android.icu.text.BreakIterator boundary = android.icu.text.BreakIterator.getWordInstance();
boundary.setText(text);
@@ -148,8 +153,6 @@ public class Fts4DbHelper extends SQLiteOpenHelper {
for (int end = boundary.next(); end != android.icu.text.BreakIterator.DONE; end = boundary.next()) {
String word = text.substring(start, end).trim().toLowerCase();
if (!TextUtils.isEmpty(word)) {
word = Normalizer.normalize(word, Normalizer.Form.NFKD)
.replaceAll("[\\p{InCombiningDiacriticalMarks}]", "");
if (sb.length() > 0)
sb.append(' ');
sb.append(word);