Feature request: A confirmation message when saving the document about djvujs

[RussCoder]

It can be done. Although, there are different ways how it can be implemented. I will think about it.

[r-pankevicius]

I haven't seen it in action, but as I remember (from translation strings) there is a message "what you would like to do with this multipart document: save this part or pack all parts and save a whole document.

Maybe like this?

[RussCoder]

Yes. But I meant a different thing. I could just accept a callback, returning true/false, in which you could just use a standard confirm() function. Or to accept a text, which is shown in a dialog inside the viewer. Probably, the latter variant.

[r-pankevicius]

I was thinking more about a data-driven stuff like this:
undefined = default (as it is now);
string = the message to display with OK button;
2 strings array: the message to display + text in the button ("Yes, I agree").

Your idea about callback function returning true/false is maybe OK, but I don't fully understand how it will fit here.

Maybe you can give an example of callback function that will work fine for my initial feature request?

[RussCoder]

The example of such a function:

function confirmation() {
   return confirm("Doing this you agree with that");
}

Of course, in a more general case it should return a Promise resolving to true or false in order to allow you to use something else besides the confirm() blocking function.
The idea to use a callback came to me with a desire not to create additional visual component and do as little as possible.
However, I know that without confirm() creation of custom window will be a hassle for you, much greater than to add such a feature using existing viewer components for me.

[r-pankevicius]

Maybe:

function confirmation(confirm) {
   return confirm("Doing this you agree with that");
}

[r-pankevicius]

Or more sophisticated:

function confirmation(confirm) {
   return confirm(
        /*message*/"Doing this you agree with that", 
        {
            "ok" : "Yes, I agree",
             "cancel": "No, I disagree",
             "default" : "ok"
         });
}

[RussCoder]

Do you know that confirm() is a browser built-in function? You can run confirm('Hello!') in the console right now.

In the latest release (viewer 0.5.6), I added a new UI option for you:

uiOptions: {
    onSaveNotification: {
      text: "Here is your notification/agreement for the user",
      yesButton: "Text on the yes button", // optional
      noButton: "Text on the no button", // optional
    },
}

It's also described in the documentation on the website.

[r-pankevicius]

If you see browser's confirm you'll feel like today is year 1999.