2 files changed, 60 insertions, 1 deletions

diff --git a/ext/mixed/js/display.js b/ext/mixed/js/display.js
index b40228b0..6d992897 100644
--- a/ext/mixed/js/display.js
+++ b/ext/mixed/js/display.js
@@ -35,6 +35,7 @@ class Display {
         this.persistentEventListeners = [];
         this.interactive = false;
         this.eventListenersActive = false;
+        this.clickScanPrevent = false;
 
         this.windowScroll = new WindowScroll();
 
@@ -81,6 +82,22 @@ class Display {
         }
     }
 
+    onGlossaryMouseDown(e) {
+        if (Frontend.isMouseButton('primary', e)) {
+            this.clickScanPrevent = false;
+        }
+    }
+
+    onGlossaryMouseMove(e) {
+        this.clickScanPrevent = true;
+    }
+
+    onGlossaryMouseUp(e) {
+        if (!this.clickScanPrevent && Frontend.isMouseButton('primary', e)) {
+            this.onTermLookup(e);
+        }
+    }
+
     async onTermLookup(e) {
         try {
             e.preventDefault();
@@ -157,8 +174,10 @@ class Display {
             const handler = handlers[key];
             if (handler(this, e)) {
                 e.preventDefault();
+                return true;
             }
         }
+        return false;
     }
 
     onWheel(e) {
@@ -250,7 +269,9 @@ class Display {
             this.addEventListeners('.kanji-link', 'click', this.onKanjiLookup.bind(this));
             this.addEventListeners('.source-term', 'click', this.onSourceTermView.bind(this));
             if (this.options.scanning.enablePopupSearch) {
-                this.addEventListeners('.glossary-item', 'click', this.onTermLookup.bind(this));
+                this.addEventListeners('.glossary-item', 'mouseup', this.onGlossaryMouseUp.bind(this));
+                this.addEventListeners('.glossary-item', 'mousedown', this.onGlossaryMouseDown.bind(this));
+                this.addEventListeners('.glossary-item', 'mousemove', this.onGlossaryMouseMove.bind(this));
             }
         } else {
             Display.clearEventListeners(this.eventListeners);
diff --git a/ext/mixed/js/extension.js b/ext/mixed/js/extension.js
index 861e52a5..54862e19 100644
--- a/ext/mixed/js/extension.js
+++ b/ext/mixed/js/extension.js
@@ -95,3 +95,41 @@ if (EXTENSION_IS_BROWSER_EDGE) {
     // Edge does not have chrome defined.
     chrome = browser;
 }
+
+function promiseTimeout(delay, resolveValue) {
+    if (delay <= 0) {
+        return Promise.resolve(resolveValue);
+    }
+
+    let timer = null;
+    let promiseResolve = null;
+    let promiseReject = null;
+
+    const complete = (callback, value) => {
+        if (callback === null) { return; }
+        if (timer !== null) {
+            window.clearTimeout(timer);
+            timer = null;
+        }
+        promiseResolve = null;
+        promiseReject = null;
+        callback(value);
+    };
+
+    const resolve = (value) => complete(promiseResolve, value);
+    const reject = (value) => complete(promiseReject, value);
+
+    const promise = new Promise((resolve, reject) => {
+        promiseResolve = resolve;
+        promiseReject = reject;
+    });
+    timer = window.setTimeout(() => {
+        timer = null;
+        resolve(resolveValue);
+    }, delay);
+
+    promise.resolve = resolve;
+    promise.reject = reject;
+
+    return promise;
+}