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Improve File API related comments

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This commit is contained in:
Zhen Zhang 2016-08-16 23:53:08 +02:00
parent 49431be44a
commit cd9fc4919d
3 changed files with 18 additions and 20 deletions
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16
components/script/dom/blob.rs
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@ -33,17 +33,18 @@ pub struct FileBlob {
}
/// Blob backend implementation
/// Different backends of Blob
#[must_root]
#[derive(JSTraceable)]
pub enum BlobImpl {
/// File-based blob
/// File-based blob, whose content lives in the net process
File(FileBlob),
/// Memory-based blob
/// Memory-based blob, whose content lives in the script process
Memory(Vec<u8>),
/// Sliced blob, including parent blob and
/// relative positions representing current slicing range,
/// it is leaf of a two-layer fat tree
/// Sliced blob, including parent blob reference and
/// relative positions of current slicing range,
/// IMPORTANT: The depth of tree is only two, i.e. the parent Blob must be
/// either File-based or Memory-based
Sliced(JS<Blob>, RelativePos),
}
@ -71,6 +72,7 @@ pub struct Blob {
reflector_: Reflector,
#[ignore_heap_size_of = "No clear owner"]
blob_impl: DOMRefCell<BlobImpl>,
/// content-type string
typeString: String,
isClosed_: Cell<bool>,
}
@ -181,7 +183,7 @@ impl Blob {
/// Promote non-Slice blob:
/// 1. Memory-based: The bytes in data slice will be transferred to file manager thread.
/// 2. File-based: Activation
/// 2. File-based: If set_valid, then activate the FileID so it can serve as URL
/// Depending on set_valid, the returned FileID can be part of
/// valid or invalid Blob URL.
fn promote(&self, set_valid: bool) -> SelectedFileId {