wip file field

2024-09-28 18:36:18 +03:00
parent 5ed57838fc
commit 39e7a3aed4
25 changed files with 674 additions and 44 deletions
@@ -0,0 +1,72 @@
+export function throttle(delay, callback, options) {
+    const {
+        noTrailing = false,
+        noLeading = false,
+        debounceMode = undefined
+    } = options || {};
+
+    let timeoutID;
+    let cancelled = false;
+    let lastExec = 0;
+
+    function clearExistingTimeout() {
+        if (timeoutID) {
+            clearTimeout(timeoutID);
+        }
+    }
+
+    function cancel(options) {
+        const {upcomingOnly = false} = options || {};
+        clearExistingTimeout();
+        cancelled = !upcomingOnly;
+    }
+
+    function wrapper(...arguments_) {
+        let self = this;
+        let elapsed = Date.now() - lastExec;
+
+        if (cancelled) {
+            return;
+        }
+
+        function exec() {
+            lastExec = Date.now();
+            callback.apply(self, arguments_);
+        }
+
+        function clear() {
+            timeoutID = undefined;
+        }
+
+        if (!noLeading && debounceMode && !timeoutID) {
+            exec();
+        }
+
+        clearExistingTimeout();
+
+        if (debounceMode === undefined && elapsed > delay) {
+            if (noLeading) {
+                lastExec = Date.now();
+                if (!noTrailing) {
+                    timeoutID = setTimeout(debounceMode ? clear : exec, delay);
+                }
+            } else {
+                exec();
+            }
+        } else if (noTrailing !== true) {
+            timeoutID = setTimeout(
+                debounceMode ? clear : exec,
+                debounceMode === undefined ? delay - elapsed : delay
+            );
+        }
+    }
+
+    wrapper.cancel = cancel;
+    return wrapper;
+}
+
+
+export function debounce(delay, callback, options) {
+    const {atBegin = false} = options || {};
+    return throttle(delay, callback, {debounceMode: atBegin !== false});
+}