CFI navigation

[jasin755]

I need to navigate using CFI string. I see that is some partial support for it, but I don't see any implementation.

[mickael-menu]

CFI is not supported in Readium and we don't have any plan of supporting it, because of the complexity it brings.

But I think we might be opened for contributions regarding this, if you're interested please reach out on Slack.

[jasin755]

Is this some tip how to navigate to paragraph (e.g. paragraph no. 180)?

[mickael-menu]

Do you have the HTML ID of the paragraph, CSS selector or its text content?

[jasin755]

No :( I only know that is 180th paragraph in whole document.

[mickael-menu]

Then I'm afraid there's no way.

[jasin755]

Ok. I think that is possible get paragraph id manually. You can I navigate to paragraph id in Readium?

[mickael-menu]

Sure, you need to:

1. Get the Link to the HTML resource that contains the paragraph from the publication's readingOrder index.
2. Append the paragraph HTML ID anchor to the Link's href (e.g. <href>#<id>).
3. Open the produced Link with the Navigator.

Something like this:

if let link = publication.readingOrder.first(withHREF: "...") {
    navigator.go(
        to: link.copy(href: link.href + "#paragraph-id"),
        animated: false
    )
}

[jasin755]

Hi Mickael. Sorry for using this thread but I think that is better than new issue. Will I work if I serialize Locator object on iPhone SE and save json string on API and open again on different size device like iPad Pro. Will be iPad on correct page?

[mickael-menu]

Yes absolutely, this is how you can synchronize the progression between devices.

Use locator.jsonString and Locator(jsonString: ...).