adding enablePrintCapability

src/MicrosoftTeams.ts

@@ -38,9 +38,12 @@ interface Window {
   onNativeMessage(evt: MessageEvent): void;
 }
 
+/**
+ * adding ctrl+P and cmd+P handler
+ */
 document.addEventListener("keydown", function(event: KeyboardEvent): void {
   if ((event.ctrlKey || event.metaKey) && event.keyCode === 80) {
-    microsoftTeams.printHandler();
+    microsoftTeams.print();
     event.cancelBubble = true;
     event.preventDefault();
     event.stopImmediatePropagation();
@@ -508,6 +511,7 @@ namespace microsoftTeams {
 
   let themeChangeHandler: (theme: string) => void;
   let customPrintHandler: () => void;
+  let printCapabilityEnabled: boolean = false;
   handlers["themeChange"] = handleThemeChange;
 
   let fullScreenChangeHandler: (isFullScreen: boolean) => void;
@@ -598,23 +602,31 @@ namespace microsoftTeams {
     };
   }
 
+  /**
+   * enable print capability
+   */
+  export function enablePrintCapability(): void {
+    printCapabilityEnabled = true;
+  }
+
   /**
    * Registers a handler for print.
    * default print handler
    */
-  export function printHandler(): void {
-    ensureInitialized();
-    if (customPrintHandler) {
-      customPrintHandler();
-    } else {
-      window.print();
+  export function print(): void {
+    if (printCapabilityEnabled) {
+      ensureInitialized();
+      if (customPrintHandler) {
+        customPrintHandler();
+      } else {
+        window.print();
+      }
     }
   }
 
   /**
-   * Registers a handler for print.
-   * Only one handler can be registered at a time. A subsequent registration replaces an existing registration.
-   * @param handler The handler to invoke when the user changes their theme.
+   * Registers a custom handler for print.
+   * @param handler The handler to invoke when printHandler is called.
    */
   export function registerCustomPrintHandler(handler: () => void): void {
     ensureInitialized();

test/MicrosoftTeams.spec.ts

@@ -599,22 +599,36 @@ describe("MicrosoftTeams", () => {
     expect(handlerCalled).toBe(true);
   });
 
+  it("print handler should not called if print capability is disabled", () => {
+    let handlerCalled = false;
+    microsoftTeams.initialize();
+    spyOn(window, "print").and.callFake((): void => {
+      handlerCalled = true;
+    });
+
+    microsoftTeams.print();
+
+    expect(handlerCalled).toBe(false);
+  });
+
   it("print handler should successfully call default print handler", () => {
     let handlerCalled = false;
     microsoftTeams.initialize();
+    microsoftTeams.enablePrintCapability();
     spyOn(window, "print").and.callFake((): void => {
       handlerCalled = true;
     });
 
-    microsoftTeams.printHandler();
+    microsoftTeams.print();
 
     expect(handlerCalled).toBe(true);
   });
 
   it("Ctrl+P should successfully call print handler", () => {
     let handlerCalled = false;
     microsoftTeams.initialize();
-    spyOn(microsoftTeams, "printHandler").and.callFake((): void => {
+    microsoftTeams.enablePrintCapability();
+    spyOn(microsoftTeams, "print").and.callFake((): void => {
       handlerCalled = true;
     });
     let printEvent = new Event("keydown");
@@ -630,7 +644,8 @@ describe("MicrosoftTeams", () => {
   it("Cmd+P should successfully call print handler", () => {
     let handlerCalled = false;
     microsoftTeams.initialize();
-    spyOn(microsoftTeams, "printHandler").and.callFake((): void => {
+    microsoftTeams.enablePrintCapability();
+    spyOn(microsoftTeams, "print").and.callFake((): void => {
       handlerCalled = true;
     });
     let printEvent = new Event("keydown");
@@ -646,11 +661,12 @@ describe("MicrosoftTeams", () => {
   it("should successfully register a print handler", () => {
     let handlerCalled = false;
     microsoftTeams.initialize();
+    microsoftTeams.enablePrintCapability();
     microsoftTeams.registerCustomPrintHandler(() => {
       handlerCalled = true;
     });
 
-    microsoftTeams.printHandler();
+    microsoftTeams.print();
 
     expect(handlerCalled).toBe(true);
   });