narayana/conversations-classic
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use scripts instead of blocks on Android >= N

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This commit is contained in:
Daniel Gultsch 2018-03-08 20:45:30 +01:00
parent 216cf1805f
commit 7ae3bdd3c6
1 changed files with 49 additions and 9 deletions
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58
src/main/java/eu/siacs/conversations/utils/IrregularUnicodeBlockDetector.java
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@ -29,7 +29,9 @@
package eu.siacs.conversations.utils; package eu.siacs.conversations.utils;
import android.annotation.TargetApi;
import android.content.Context; import android.content.Context;
import android.os.Build;
import android.support.annotation.ColorInt; import android.support.annotation.ColorInt;
import android.text.Spannable; import android.text.Spannable;
import android.text.SpannableString; import android.text.SpannableString;
@ -53,10 +55,10 @@ import rocks.xmpp.addr.Jid;
public class IrregularUnicodeBlockDetector { public class IrregularUnicodeBlockDetector {
private static final Map<Character.UnicodeBlock,Character.UnicodeBlock> NORMALIZATION_MAP; private static final Map<Character.UnicodeBlock, Character.UnicodeBlock> NORMALIZATION_MAP;
static { static {
Map<Character.UnicodeBlock,Character.UnicodeBlock> temp = new HashMap<>(); Map<Character.UnicodeBlock, Character.UnicodeBlock> temp = new HashMap<>();
temp.put(Character.UnicodeBlock.LATIN_1_SUPPLEMENT, Character.UnicodeBlock.BASIC_LATIN); temp.put(Character.UnicodeBlock.LATIN_1_SUPPLEMENT, Character.UnicodeBlock.BASIC_LATIN);
NORMALIZATION_MAP = Collections.unmodifiableMap(temp); NORMALIZATION_MAP = Collections.unmodifiableMap(temp);
} }
@ -98,7 +100,7 @@ public class IrregularUnicodeBlockDetector {
return builder; return builder;
} }
private static Map<Character.UnicodeBlock, List<String>> map(Jid jid) { private static Map<Character.UnicodeBlock, List<String>> mapCompat(Jid jid) {
Map<Character.UnicodeBlock, List<String>> map = new HashMap<>(); Map<Character.UnicodeBlock, List<String>> map = new HashMap<>();
String local = jid.getLocal(); String local = jid.getLocal();
final int length = local.length(); final int length = local.length();
@ -118,16 +120,48 @@ public class IrregularUnicodeBlockDetector {
return map; return map;
} }
private static Set<String> eliminateFirstAndGetCodePoints(Map<Character.UnicodeBlock, List<String>> map) { @TargetApi(Build.VERSION_CODES.N)
Character.UnicodeBlock block = Character.UnicodeBlock.BASIC_LATIN; private static Map<Character.UnicodeScript, List<String>> map(Jid jid) {
Map<Character.UnicodeScript, List<String>> map = new HashMap<>();
String local = jid.getLocal();
final int length = local.length();
for (int offset = 0; offset < length; ) {
final int codePoint = local.codePointAt(offset);
Character.UnicodeScript script = Character.UnicodeScript.of(codePoint);
if (script != Character.UnicodeScript.COMMON) {
List<String> codePoints;
if (map.containsKey(script)) {
codePoints = map.get(script);
} else {
codePoints = new ArrayList<>();
map.put(script, codePoints);
}
codePoints.add(String.copyValueOf(Character.toChars(codePoint)));
}
offset += Character.charCount(codePoint);
}
return map;
}
private static Set<String> eliminateFirstAndGetCodePointsCompat(Map<Character.UnicodeBlock, List<String>> map) {
return eliminateFirstAndGetCodePoints(map, Character.UnicodeBlock.BASIC_LATIN);
}
@TargetApi(Build.VERSION_CODES.N)
private static Set<String> eliminateFirstAndGetCodePoints(Map<Character.UnicodeScript, List<String>> map) {
return eliminateFirstAndGetCodePoints(map, Character.UnicodeScript.COMMON);
}
private static <T> Set<String> eliminateFirstAndGetCodePoints(Map<T, List<String>> map, T defaultPick) {
T pick = defaultPick;
int size = 0; int size = 0;
for (Map.Entry<Character.UnicodeBlock, List<String>> entry : map.entrySet()) { for (Map.Entry<T, List<String>> entry : map.entrySet()) {
if (entry.getValue().size() > size) { if (entry.getValue().size() > size) {
size = entry.getValue().size(); size = entry.getValue().size();
block = entry.getKey(); pick = entry.getKey();
} }
} }
map.remove(block); map.remove(pick);
Set<String> all = new HashSet<>(); Set<String> all = new HashSet<>();
for (List<String> codePoints : map.values()) { for (List<String> codePoints : map.values()) {
all.addAll(codePoints); all.addAll(codePoints);
@ -141,7 +175,13 @@ public class IrregularUnicodeBlockDetector {
if (pattern != null) { if (pattern != null) {
return pattern; return pattern;
} }
pattern = create(eliminateFirstAndGetCodePoints(map(jid))); Set<String> codePoints;
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
codePoints = eliminateFirstAndGetCodePointsCompat(mapCompat(jid));
} else {
codePoints = eliminateFirstAndGetCodePoints(map(jid));
}
pattern = create(codePoints);
CACHE.put(jid, pattern); CACHE.put(jid, pattern);
return pattern; return pattern;
} }