mirror of https://github.com/loro-dev/loro.git synced 2025-02-08 21:47:41 +00:00

refactor!: Add prelim support, making creating sub container easier (#300 )

This PR includes a BREAKING CHANGE.

It enables you to create containers before attaching them to the document, making the API more intuitive and straightforward.

A container can be either attached to a document or detached. When it's detached, its history/state does not persist. You can attach a container to a document by inserting it into an attached container. Once a container is attached, its state, along with all of its descendants's states, will be recreated in the document. After attaching, the container and its descendants, will each have their corresponding "attached" version of themselves?

When a detached container x is attached to a document, you can use x.getAttached() to obtain the corresponding attached container.

2024-03-30 11:38:24 +08:00

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Loro

Loro is a high-performance CRDTs framework offering Rust and JavaScript APIs.

Designed for local-first software, it enables effortless collaboration in app states.

PS: Version control is forthcoming. Time travel functionality is already accessible at https://loro.dev/docs/tutorial/time_travel.

Examples

Map/List/Text

use loro::{LoroDoc, LoroList, LoroText, LoroValue, ToJson};
use serde_json::json;

let doc = LoroDoc::new();
let map = doc.get_map("map");
map.insert("key", "value").unwrap();
map.insert("true", true).unwrap();
map.insert("null", LoroValue::Null).unwrap();
map.insert("deleted", LoroValue::Null).unwrap();
map.delete("deleted").unwrap();
let list = map.insert_container("list", LoroList::new()).unwrap();
list.insert(0, "List").unwrap();
list.insert(1, 9).unwrap();
let text = map.insert_container("text", LoroText::new()).unwrap();
text.insert(0, "Hello world!").unwrap();
assert_eq!(
    doc.get_deep_value().to_json_value(),
    json!({
        "map": {
            "key": "value",
            "true": true,
            "null": null,
            "list": ["List", 9],
            "text": "Hello world!"
        }
    })
);

Rich Text

use loro::{ExpandType, LoroDoc, ToJson};
use serde_json::json;

let doc = LoroDoc::new();
let text = doc.get_text("text");
text.insert(0, "Hello world!").unwrap();
text.mark(0..5, "bold", true).unwrap();
assert_eq!(
    text.to_delta().to_json_value(),
    json!([
        { "insert": "Hello", "attributes": {"bold": true} },
        { "insert": " world!" },
    ])
);
text.unmark(3..5, "bold").unwrap();
assert_eq!(
    text.to_delta().to_json_value(),
    json!([
          { "insert": "Hel", "attributes": {"bold": true} },
          { "insert": "lo world!" },
    ])
);

Sync

use loro::{LoroDoc, ToJson, ExpandType};
use serde_json::json;

let doc = LoroDoc::new();
let text = doc.get_text("text");
text.insert(0, "Hello world!").unwrap();
let bytes = doc.export_from(&Default::default());
let doc_b = LoroDoc::new();
doc_b.import(&bytes).unwrap();
assert_eq!(doc.get_deep_value(), doc_b.get_deep_value());
let text_b = doc_b.get_text("text");
text_b
    .mark(0..5, "bold", true)
    .unwrap();
doc.import(&doc_b.export_from(&doc.oplog_vv())).unwrap();
assert_eq!(
    text.to_delta().to_json_value(),
    json!([
        { "insert": "Hello", "attributes": {"bold": true} },
        { "insert": " world!" },
    ])
);

Save

use loro::LoroDoc;

let doc = LoroDoc::new();
let text = doc.get_text("text");
text.insert(0, "123").unwrap();
let snapshot = doc.export_snapshot();

let new_doc = LoroDoc::new();
new_doc.import(&snapshot).unwrap();
assert_eq!(new_doc.get_deep_value(), doc.get_deep_value());

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