feat: add Webiew::navigate_to_url, closes #776

[amrbashir]

What kind of change does this PR introduce?

• Bugfix
• Feature
• Docs
• New Binding issue #___
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change?

• Yes, and the changes were approved in issue #___
• No

Checklist

• When resolving issues, they are referenced in the PR's title (e.g fix: remove a typo, closes #___, #___)
• A change file is added if any packages will require a version bump due to this PR per the instructions in the readme.
• I have added a convincing reason for adding this feature, if necessary

Other information

[patientplatypus6]

Some quick comments, because this looks like it would be important for the usefulness of the library.
First, this feature is not yet in the main branch of the library and I would encourage you to push it as soon as possible. What I am doing is using an IPC_Channel (through Servo, not between Javascript code) to run this library in conjunction with Rust/Iced.

Here's is what I'm working on -
https://github.com/patientplatypus6/ipciceexample
Specifically, I'd like to be able to programmatically push new URLs based on state changes that occur at top level - see line marked below. I can save local state in an enum, but I can't push a new URL.
https://github.com/patientplatypus6/ipciceexample/blob/main/webview/src/main.rs#L84

This is a blocking issue for what I'm working on, so whenever this happens to be pushed into the main branch if you could be so kind as to just respond to this comment so I can repull the repo that would be helpful.

Thanks for all your hard work on this library. Merry Christmas and Happy Holidays.

[amrbashir]

@patientplatypus6 this has been released https://docs.rs/wry/latest/wry/webview/struct.WebView.html#method.load_url

[patientplatypus6]

Thanks for the reply. It took me a little bit of thinking in how this was supposed to work. Sorry I am unfamiliar with the library. Here is an example page on how you can pass a load_url.

The important bit is that you can pass the webview that is returned from the builder

    let webview = WebViewBuilder::new(window)?
      .with_url(url)?
      .build()?;

into the eventloop.run which I didn't think was possible for some reason -

    event_loop.run(move |event, x, control_flow| {
      *control_flow = ControlFlow::Wait;
      match event {
        Event::NewEvents(StartCause::Init) => {
            newstate = data_handler(prevstate.clone());
        },
        Event::MainEventsCleared => {
            if Some(newstate.data.clone()) != Some(prevstate.data.clone()) {  
                println!("newstate.data.clone() {:?}", newstate.data.clone());
                let newstatedata = newstate.data.clone().unwrap();
                let newstateparent = newstate.parent.clone().unwrap();
                println!("value of newstatedata: {:?}", newstatedata);
                state_updated(newstatedata, newstateparent);
                prevstate = newstate.clone();
                let newurl = "https://www.reddit.com".to_string();
                proxy.send_event(UserEvent::Navigation(newurl.clone()));
            }
        },
        Event::UserEvent(UserEvent::Navigation(uri)) => {
            println!("{}", uri);
            let url = uri.clone();
            println!("value of url {:?}", url); 
            webview.load_url(&uri);
        },
        Event::WindowEvent {
          event: WindowEvent::CloseRequested,
          ..
        } => *control_flow = ControlFlow::Exit,
        _ => (),
      }
    });
  }

webview.load_url(&uri) would be available under the arm Event::UserEvent(UserEvent::Navigation(uri)) => { in the match statement. Here is a link to my repo.

https://github.com/patientplatypus6/ipciceexample/blob/main/webview/src/main.rs#L85

Thanks again for the reply and working on this library.