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-rw-r--r--ext/bg/js/util.js41
1 files changed, 41 insertions, 0 deletions
diff --git a/ext/bg/js/util.js b/ext/bg/js/util.js
index f44582eb..091137ed 100644
--- a/ext/bg/js/util.js
+++ b/ext/bg/js/util.js
@@ -26,6 +26,43 @@ function utilIsolate(data) {
return JSON.parse(JSON.stringify(data));
}
+function utilSetEqual(setA, setB) {
+ if (setA.size !== setB.size) {
+ return false;
+ }
+
+ for (const value of setA) {
+ if (!setB.has(value)) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+function utilSetIntersection(setA, setB) {
+ return new Set(
+ [...setA].filter(value => setB.has(value))
+ );
+}
+
+function utilSetDifference(setA, setB) {
+ return new Set(
+ [...setA].filter(value => !setB.has(value))
+ );
+}
+
+function utilStringHashCode(string) {
+ let hashCode = 0;
+
+ for (let i = 0, charCode = string.charCodeAt(i); i < string.length; charCode = string.charCodeAt(++i)) {
+ hashCode = ((hashCode << 5) - hashCode) + charCode;
+ hashCode |= 0;
+ }
+
+ return hashCode;
+}
+
function utilBackend() {
return chrome.extension.getBackgroundPage().yomichan_backend;
}
@@ -46,6 +83,10 @@ function utilDatabaseGetTitles() {
return utilBackend().translator.database.getTitles();
}
+function utilDatabaseGetTitlesWithSequences() {
+ return utilBackend().translator.database.getTitlesWithSequences();
+}
+
function utilDatabasePurge() {
return utilBackend().translator.database.purge();
}