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LibWeb: Make process_blob_parts() publicly accessible

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This pulls process_blob_parts() out of the Blob class and makes it
publicly accessible.
This commit is contained in:
Kenneth Myhra 2022-07-24 16:05:25 +02:00 • committed by Linus Groh
parent 622a4f29a7
commit c038a8c9c9
2 changed files with 36 additions and 34 deletions
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67
Userland/Libraries/LibWeb/FileAPI/Blob.cpp
View file

@ -12,6 +12,40 @@
namespace Web::FileAPI {
// https://w3c.github.io/FileAPI/#process-blob-parts
ErrorOr<ByteBuffer> process_blob_parts(Vector<BlobPart> const& blob_parts)
{
// 1. Let bytes be an empty sequence of bytes.
ByteBuffer bytes {};
// 2. For each element in parts:
for (auto const& blob_part : blob_parts) {
TRY(blob_part.visit(
// 1. If element is a USVString, run the following sub-steps:
[&](String const& string) -> ErrorOr<void> {
// NOTE: This step is handled by the lambda expression.
// 1. Let s be element.
// FIXME: 2. If the endings member of options is "native", set s to the result of converting line endings to native of element.
// NOTE: The AK::String is always UTF-8.
// 3. Append the result of UTF-8 encoding s to bytes.
return bytes.try_append(string.to_byte_buffer());
},
// 2. If element is a BufferSource, get a copy of the bytes held by the buffer source, and append those bytes to bytes.
[&](JS::Handle<JS::Object> const& buffer_source) -> ErrorOr<void> {
auto data_buffer = TRY(Bindings::IDL::get_buffer_source_copy(*buffer_source.cell()));
return bytes.try_append(data_buffer.bytes());
},
// 3. If element is a Blob, append the bytes it represents to bytes.
[&](NonnullRefPtr<Blob> const& blob) -> ErrorOr<void> {
return bytes.try_append(blob->bytes());
}));
}
// 3. Return bytes.
return bytes;
}
Blob::Blob(ByteBuffer byte_buffer, String type)
: m_byte_buffer(move(byte_buffer))
, m_type(move(type))
@ -49,39 +83,6 @@ DOM::ExceptionOr<NonnullRefPtr<Blob>> Blob::create_with_global_object(Bindings::
return Blob::create(blob_parts, options);
}
// https://w3c.github.io/FileAPI/#process-blob-parts
ErrorOr<ByteBuffer> Blob::process_blob_parts(Vector<BlobPart> const& blob_parts)
{
// 1. Let bytes be an empty sequence of bytes.
ByteBuffer bytes {};
// 2. For each element in parts:
for (auto const& blob_part : blob_parts) {
TRY(blob_part.visit(
// 1. If element is a USVString, run the following sub-steps:
[&](String const& string) -> ErrorOr<void> {
// NOTE: This step is handled by the lambda expression.
// 1. Let s be element.
// FIXME: 2. If the endings member of options is "native", set s to the result of converting line endings to native of element.
// NOTE: The AK::String is always UTF-8.
// 3. Append the result of UTF-8 encoding s to bytes.
return bytes.try_append(string.to_byte_buffer());
},
// 2. If element is a BufferSource, get a copy of the bytes held by the buffer source, and append those bytes to bytes.
[&](JS::Handle<JS::Object> const& buffer_source) -> ErrorOr<void> {
auto data_buffer = TRY(Bindings::IDL::get_buffer_source_copy(*buffer_source.cell()));
return bytes.try_append(data_buffer.bytes());
},
// 3. If element is a Blob, append the bytes it represents to bytes.
[&](NonnullRefPtr<Blob> const& blob) -> ErrorOr<void> {
return bytes.try_append(blob->bytes());
}));
}
return bytes;
}
// https://w3c.github.io/FileAPI/#dfn-slice
DOM::ExceptionOr<NonnullRefPtr<Blob>> Blob::slice(Optional<i64> start, Optional<i64> end, Optional<String> const& content_type)
{

3
Userland/Libraries/LibWeb/FileAPI/Blob.h
View file

@ -26,6 +26,8 @@ struct BlobPropertyBag {
Bindings::EndingType endings;
};
[[nodiscard]] ErrorOr<ByteBuffer> process_blob_parts(Vector<BlobPart> const& blob_parts);
class Blob
: public RefCounted<Blob>
, public Weakable<Blob>
@ -52,7 +54,6 @@ public:
private:
Blob() = default;
static ErrorOr<ByteBuffer> process_blob_parts(Vector<BlobPart> const& blob_parts);
ByteBuffer m_byte_buffer {};
String m_type {};