harmony 鸿蒙Opening Pages in a New Window

2023-06-24
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Opening Pages in a New Window

The Web component provides the capability of opening pages in a new window. You can call multiWindowAccess() to specify whether to allow a web page to be opened in a new window. When a new window is opened in the Web component, the application will receive a window opening event through onWindowNew(). You need to add the code for processing the window opening request in the event callback.

NOTE

If allowWindowOpenMethod() is set to true, you can open a new window in the frontend page by invoking its JavaScript functions.

If you do not create a new window in onWindowNew(), set the parameter of ControllerHandler.setWebController() to null.

In the following example, when a user clicks the Open Page in New Window button, the application receives a window opening event in the onWindowNew() callback.

Application code:

  // xxx.ets
  import { webview } from '@kit.ArkWeb';

  // There are two Web components on the same page. When the WebComponent object opens a new window, the NewWebViewComp object is displayed. 
  @CustomDialog
  struct NewWebViewComp {
    controller?: CustomDialogController;
    webviewController1: webview.WebviewController = new webview.WebviewController();

    build() {
      Column() {
        Web({ src: "", controller: this.webviewController1 })
          .javaScriptAccess(true)
          .multiWindowAccess(false)
          .onWindowExit(() => {
            console.info("NewWebViewComp onWindowExit");
            if (this.controller) {
              this.controller.close();
            }
          })
      }
    }
  }

  @Entry
  @Component
  struct WebComponent {
    controller: webview.WebviewController = new webview.WebviewController();
    dialogController: CustomDialogController|null = null;

    build() {
      Column() {
        Web({ src: $rawfile("window.html"), controller: this.controller })
          .javaScriptAccess(true)
            // Enable the multi-window permission.
          .multiWindowAccess(true)
          .allowWindowOpenMethod(true)
          .onWindowNew((event) => {
            if (this.dialogController) {
              this.dialogController.close()
            }
            let popController: webview.WebviewController = new webview.WebviewController();
            this.dialogController = new CustomDialogController({
              builder: NewWebViewComp({ webviewController1: popController })
            })
            this.dialogController.open();
            // Return the WebviewController object corresponding to the new window to the Web kernel.
            // If the event.handler.setWebController API is not called, the render process will be blocked.
            // If no new window is created, set the value of event.handler.setWebController to null to notify the Web component that no new window is created.
            event.handler.setWebController(popController);
          })
      }
    }
  }

Code of the window.html page:

  <!DOCTYPE html>
  <html>
  <head>
      <meta name="viewport" content="width=device-width"/>
      <title>WindowEvent</title>
  </head>
  <body>
  <input type="button" value="Open Page in New Window" onclick="OpenNewWindow()">
  <script type="text/javascript">
      function OpenNewWindow()
      {
          var txt ='Opened window'
          let openedWindow = window.open("about:blank", "", "location=no,status=no,scrollvars=no");
          openedWindow.document.write("<p>" + "<br><br>" + txt.fontsize(10) + "</p>");
          openedWindow.focus();
      }
  </script>
  </body>
  </html>

Figure 1 Effect of opening a page in a new window

web-open-in-new-window