Move additional utility functions to DOM

2 files changed, 22 insertions, 2 deletions

diff --git a/ext/mixed/js/display.js b/ext/mixed/js/display.js
index cbf8efb7..854418f4 100644
--- a/ext/mixed/js/display.js
+++ b/ext/mixed/js/display.js
@@ -85,7 +85,7 @@ class Display {
     }
 
     onGlossaryMouseDown(e) {
-        if (Frontend.isMouseButtonPressed('primary', e)) {
+        if (DOM.isMouseButtonPressed(e, 'primary')) {
             this.clickScanPrevent = false;
         }
     }
@@ -95,7 +95,7 @@ class Display {
     }
 
     onGlossaryMouseUp(e) {
-        if (!this.clickScanPrevent && Frontend.isMouseButtonPressed('primary', e)) {
+        if (!this.clickScanPrevent && DOM.isMouseButtonPressed(e, 'primary')) {
             this.onTermLookup(e);
         }
     }
diff --git a/ext/mixed/js/dom.js b/ext/mixed/js/dom.js
index 4525dace..4e4d49e3 100644
--- a/ext/mixed/js/dom.js
+++ b/ext/mixed/js/dom.js
@@ -43,4 +43,24 @@ class DOM {
         }
         return false;
     }
+
+    static isMouseButtonPressed(mouseEvent, button) {
+        const mouseEventButton = mouseEvent.button;
+        switch (button) {
+            case 'primary': return mouseEventButton === 0;
+            case 'secondary': return mouseEventButton === 2;
+            case 'auxiliary': return mouseEventButton === 1;
+            default: return false;
+        }
+    }
+
+    static isMouseButtonDown(mouseEvent, button) {
+        const mouseEventButtons = mouseEvent.buttons;
+        switch (button) {
+            case 'primary': return (mouseEventButtons & 0x1) !== 0x0;
+            case 'secondary': return (mouseEventButtons & 0x2) !== 0x0;
+            case 'auxiliary': return (mouseEventButtons & 0x4) !== 0x0;
+            default: return false;
+        }
+    }
 }