Merge 97063f8 into 04fadbc

src/MicrosoftTeams.ts

@@ -496,6 +496,7 @@ namespace microsoftTeams {
   let callbacks: { [id: number]: Function } = {};
   let frameContext: string;
   let hostClientType: string;
+  let printCapabilityEnabled: boolean = false;
 
   let themeChangeHandler: (theme: string) => void;
   handlers["themeChange"] = handleThemeChange;
@@ -588,6 +589,32 @@ namespace microsoftTeams {
     };
   }
 
+  /**
+   * Enable print capability to support printing page using Ctrl+P and cmd+P
+   */
+  export function enablePrintCapability(): void {
+    if (!printCapabilityEnabled) {
+      printCapabilityEnabled = true;
+      ensureInitialized();
+      // adding ctrl+P and cmd+P handler
+      document.addEventListener("keydown", (event: KeyboardEvent) => {
+        if ((event.ctrlKey || event.metaKey) && event.keyCode === 80) {
+          microsoftTeams.print();
+          event.cancelBubble = true;
+          event.preventDefault();
+          event.stopImmediatePropagation();
+        }
+      });
+    }
+  }
+
+  /**
+   * default print handler
+   */
+  export function print(): void {
+    window.print();
+  }
+
   /**
    * Retrieves the current context the frame is running in.
    * @param callback The callback to invoke when the {@link Context} object is retrieved.

test/MicrosoftTeams.spec.ts

@@ -566,6 +566,85 @@ describe("MicrosoftTeams", () => {
 
     sendMessage("settings.remove");
 
+    expect(handlerCalled).toBeTruthy();
+  });
+
+  it("Ctrl+P shouldn't call print handler if printCapabilty is disabled", () => {
+    let handlerCalled = false;
+    microsoftTeams.initialize();
+    spyOn(microsoftTeams, "print").and.callFake((): void => {
+      handlerCalled = true;
+    });
+    let printEvent = new Event("keydown");
+    // tslint:disable:no-any
+    (printEvent as any).keyCode = 80;
+    (printEvent as any).ctrlKey = true;
+    // tslint:enable:no-any
+
+    document.dispatchEvent(printEvent);
+    expect(handlerCalled).toBeFalsy();
+  });
+
+  it("Cmd+P shouldn't call print handler if printCapabilty is disabled", () => {
+    let handlerCalled = false;
+    microsoftTeams.initialize();
+    spyOn(microsoftTeams, "print").and.callFake((): void => {
+      handlerCalled = true;
+    });
+    let printEvent = new Event("keydown");
+    // tslint:disable:no-any
+    (printEvent as any).keyCode = 80;
+    (printEvent as any).metaKey = true;
+    // tslint:enable:no-any
+
+    document.dispatchEvent(printEvent);
+    expect(handlerCalled).toBeFalsy();
+  });
+
+  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.print();
+
+    expect(handlerCalled).toBeTruthy();
+  });
+
+  it("Ctrl+P should successfully call print handler", () => {
+    let handlerCalled = false;
+    microsoftTeams.initialize();
+    microsoftTeams.enablePrintCapability();
+    spyOn(microsoftTeams, "print").and.callFake((): void => {
+      handlerCalled = true;
+    });
+    let printEvent = new Event("keydown");
+    // tslint:disable:no-any
+    (printEvent as any).keyCode = 80;
+    (printEvent as any).ctrlKey = true;
+    // tslint:enable:no-any
+
+    document.dispatchEvent(printEvent);
+    expect(handlerCalled).toBeTruthy();
+  });
+
+  it("Cmd+P should successfully call print handler", () => {
+    let handlerCalled = false;
+    microsoftTeams.initialize();
+    microsoftTeams.enablePrintCapability();
+    spyOn(microsoftTeams, "print").and.callFake((): void => {
+      handlerCalled = true;
+    });
+    let printEvent = new Event("keydown");
+    // tslint:disable:no-any
+    (printEvent as any).keyCode = 80;
+    (printEvent as any).metaKey = true;
+    // tslint:enable:no-any
+
+    document.dispatchEvent(printEvent);
     expect(handlerCalled).toBe(true);
   });