Support loading .bpl blueprint files (#5513)

### What
* Part of #5294

This implements loading of blueprint files (.rbl) on native and on web,
using either drag-and-drop of the `Open…` command.

One shortcoming of the approach in this PR is documented here:
* #5514

### Checklist
* [x] I have read and agree to [Contributor
Guide](https://github.com/rerun-io/rerun/blob/main/CONTRIBUTING.md) and
the [Code of
Conduct](https://github.com/rerun-io/rerun/blob/main/CODE_OF_CONDUCT.md)
* [x] I've included a screenshot or gif (if applicable)
* [x] I have tested the web demo (if applicable):
* Using newly built examples:
[app.rerun.io](https://app.rerun.io/pr/5513/index.html)
* Using examples from latest `main` build:
[app.rerun.io](https://app.rerun.io/pr/5513/index.html?manifest_url=https://app.rerun.io/version/main/examples_manifest.json)
* Using full set of examples from `nightly` build:
[app.rerun.io](https://app.rerun.io/pr/5513/index.html?manifest_url=https://app.rerun.io/version/nightly/examples_manifest.json)
* [x] The PR title and labels are set such as to maximize their
usefulness for the next release's CHANGELOG
* [x] If applicable, add a new check to the [release
checklist](https://github.com/rerun-io/rerun/blob/main/tests/python/release_checklist)!

- [PR Build Summary](https://build.rerun.io/pr/5513)
- [Docs
preview](https://rerun.io/preview/9b3e7d9aed9113d340516caed9d87897c8ae8abb/docs)
<!--DOCS-PREVIEW-->
- [Examples
preview](https://rerun.io/preview/9b3e7d9aed9113d340516caed9d87897c8ae8abb/examples)
<!--EXAMPLES-PREVIEW-->
- [Recent benchmark results](https://build.rerun.io/graphs/crates.html)
- [Wasm size tracking](https://build.rerun.io/graphs/sizes.html)

crates/re_data_source/src/data_loader/loader_rrd.rs

@@ -24,7 +24,8 @@ impl crate::DataLoader for RrdLoader {
         re_tracing::profile_function!(filepath.display().to_string());
 
         let extension = crate::extension(&filepath);
-        if extension != "rrd" {
+        if !matches!(extension.as_str(), "rbl" | "rrd") {
+            // NOTE: blueprints and recordings has the same file format
             return Err(crate::DataLoaderError::Incompatible(filepath.clone()));
         }
 
@@ -66,7 +67,8 @@ impl crate::DataLoader for RrdLoader {
         re_tracing::profile_function!(filepath.display().to_string());
 
         let extension = crate::extension(&filepath);
-        if extension != "rrd" {
+        if !matches!(extension.as_str(), "rbl" | "rrd") {
+            // NOTE: blueprints and recordings has the same file format
             return Err(crate::DataLoaderError::Incompatible(filepath));
         }
 

crates/re_data_source/src/data_source.rs

@@ -108,6 +108,24 @@ impl DataSource {
         }
     }
 
+    pub fn file_name(&self) -> Option<String> {
+        match self {
+            DataSource::RrdHttpUrl(url) => url.split('/').last().map(|r| r.to_owned()),
+            #[cfg(not(target_arch = "wasm32"))]
+            DataSource::FilePath(_, path) => {
+                path.file_name().map(|s| s.to_string_lossy().to_string())
+            }
+            DataSource::FileContents(_, file_contents) => Some(file_contents.name.clone()),
+            DataSource::WebSocketAddr(_) => None,
+            #[cfg(not(target_arch = "wasm32"))]
+            DataSource::Stdin => None,
+        }
+    }
+
+    pub fn is_blueprint(&self) -> Option<bool> {
+        self.file_name().map(|name| name.ends_with(".rbl"))
+    }
+
     /// Stream the data from the given data source.
     ///
     /// Will do minimal checks (e.g. that the file exists), for synchronous errors,

crates/re_data_source/src/lib.rs

@@ -38,12 +38,21 @@ pub use self::load_file::load_from_path;
 /// This is what you get when loading a file on Web, or when using drag-n-drop.
 //
 // TODO(#4554): drag-n-drop streaming support
-#[derive(Clone, Debug)]
+#[derive(Clone)]
 pub struct FileContents {
     pub name: String,
     pub bytes: std::sync::Arc<[u8]>,
 }
 
+impl std::fmt::Debug for FileContents {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("FileContents")
+            .field("name", &self.name)
+            .field("bytes", &format_args!("{} bytes", self.bytes.len()))
+            .finish()
+    }
+}
+
 // …given that all feature flags are turned on for the `image` crate.
 pub const SUPPORTED_IMAGE_EXTENSIONS: &[&str] = &[
     "avif", "bmp", "dds", "exr", "farbfeld", "ff", "gif", "hdr", "ico", "jpeg", "jpg", "pam",
@@ -55,7 +64,7 @@ pub const SUPPORTED_MESH_EXTENSIONS: &[&str] = &["glb", "gltf", "obj", "stl"];
 // TODO(#4532): `.ply` data loader should support 2D point cloud & meshes
 pub const SUPPORTED_POINT_CLOUD_EXTENSIONS: &[&str] = &["ply"];
 
-pub const SUPPORTED_RERUN_EXTENSIONS: &[&str] = &["rrd"];
+pub const SUPPORTED_RERUN_EXTENSIONS: &[&str] = &["rbl", "rrd"];
 
 // TODO(#4555): Add catch-all builtin `DataLoader` for text files
 pub const SUPPORTED_TEXT_EXTENSIONS: &[&str] = &["txt", "md"];

crates/re_data_source/src/load_file.rs

@@ -34,7 +34,7 @@ pub fn load_from_path(
 
     re_log::info!("Loading {path:?}…");
 
-    let data = load(settings, path, None)?;
+    let rx = load(settings, path, None)?;
 
     // TODO(cmc): should we always unconditionally set store info though?
     // If we reach this point, then at least one compatible `DataLoader` has been found.
@@ -45,7 +45,7 @@ pub fn load_from_path(
         }
     }
 
-    send(&settings.store_id, data, tx);
+    send(&settings.store_id, rx, tx);
 
     Ok(())
 }

crates/re_entity_db/src/entity_db.rs

@@ -82,9 +82,6 @@ fn insert_row_with_retries(
 ///
 /// NOTE: all mutation is to be done via public functions!
 pub struct EntityDb {
-    /// The [`StoreId`] for this log.
-    store_id: StoreId,
-
     /// Set by whomever created this [`EntityDb`].
     pub data_source: Option<re_smart_channel::SmartChannelSource>,
 
@@ -126,7 +123,6 @@ impl EntityDb {
         );
         let query_caches = re_query_cache::Caches::new(&data_store);
         Self {
-            store_id: store_id.clone(),
             data_source: None,
             set_store_info: None,
             last_modified_at: web_time::Instant::now(),
@@ -193,11 +189,11 @@ impl EntityDb {
     }
 
     pub fn store_kind(&self) -> StoreKind {
-        self.store_id.kind
+        self.store_id().kind
     }
 
     pub fn store_id(&self) -> &StoreId {
-        &self.store_id
+        self.data_store.id()
     }
 
     pub fn timelines(&self) -> impl ExactSizeIterator<Item = &Timeline> {
@@ -486,7 +482,6 @@ impl EntityDb {
         re_tracing::profile_function!();
 
         let Self {
-            store_id: _,
             data_source: _,
             set_store_info: _,
             last_modified_at: _,

crates/re_log_types/src/lib.rs

@@ -227,6 +227,17 @@ impl LogMsg {
             Self::ArrowMsg(store_id, _) => store_id,
         }
     }
+
+    pub fn set_store_id(&mut self, new_store_id: StoreId) {
+        match self {
+            LogMsg::SetStoreInfo(store_info) => {
+                store_info.info.store_id = new_store_id;
+            }
+            LogMsg::ArrowMsg(msg_store_id, _) => {
+                *msg_store_id = new_store_id;
+            }
+        }
+    }
 }
 
 impl_into_enum!(SetStoreInfo, LogMsg, SetStoreInfo);