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Implement read methods on FileReaderSync
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9 changed files with 277 additions and 104 deletions
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@ -2,17 +2,25 @@
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use dom::bindings::codegen::Bindings::FileReaderSyncBinding;
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use dom::bindings::error::Fallible;
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use dom::bindings::codegen::Bindings::BlobBinding::BlobMethods;
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use dom::bindings::codegen::Bindings::FileReaderSyncBinding::{FileReaderSyncBinding, FileReaderSyncMethods};
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use dom::bindings::error::{Error, Fallible};
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use dom::bindings::reflector::reflect_dom_object;
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use dom::bindings::root::DomRoot;
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use dom::bindings::str::DOMString;
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use dom::blob::Blob;
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use dom::eventtarget::EventTarget;
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use dom::filereader::FileReaderSharedFunctionality;
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use dom::globalscope::GlobalScope;
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use dom_struct::dom_struct;
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use js::jsapi::{JSContext, JSObject};
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use js::typedarray::{ArrayBuffer, CreateWith};
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use std::ptr;
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use std::ptr::NonNull;
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#[dom_struct]
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pub struct FileReaderSync {
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eventtarget: EventTarget
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eventtarget: EventTarget,
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}
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impl FileReaderSync {
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@ -23,11 +31,79 @@ impl FileReaderSync {
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}
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pub fn new(global: &GlobalScope) -> DomRoot<FileReaderSync> {
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reflect_dom_object(Box::new(FileReaderSync::new_inherited()),
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global, FileReaderSyncBinding::Wrap)
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reflect_dom_object(
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Box::new(FileReaderSync::new_inherited()),
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global,
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FileReaderSyncBinding::Wrap,
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)
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}
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pub fn Constructor(global: &GlobalScope) -> Fallible<DomRoot<FileReaderSync>> {
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Ok(FileReaderSync::new(global))
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}
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fn get_blob_bytes(blob: &Blob) -> Result<Vec<u8>, Error> {
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blob.get_bytes().map_err(|_| Error::NotReadable)
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}
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}
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impl FileReaderSyncMethods for FileReaderSync {
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// https://w3c.github.io/FileAPI/#readAsBinaryStringSyncSection
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fn ReadAsBinaryString(&self, blob: &Blob) -> Fallible<DOMString> {
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// step 1
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let blob_contents = FileReaderSync::get_blob_bytes(blob)?;
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// step 2
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Ok(DOMString::from(String::from_utf8_lossy(&blob_contents)))
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}
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// https://w3c.github.io/FileAPI/#readAsTextSync
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fn ReadAsText(&self, blob: &Blob, label: Option<DOMString>) -> Fallible<DOMString> {
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// step 1
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let blob_contents = FileReaderSync::get_blob_bytes(blob)?;
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// step 2
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let blob_label = label.map(String::from);
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let blob_type = String::from(blob.Type());
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let output =
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FileReaderSharedFunctionality::text_decode(&blob_contents, &blob_type, &blob_label);
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Ok(output)
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}
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// https://w3c.github.io/FileAPI/#readAsDataURLSync-section
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fn ReadAsDataURL(&self, blob: &Blob) -> Fallible<DOMString> {
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// step 1
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let blob_contents = FileReaderSync::get_blob_bytes(blob)?;
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// step 2
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let output =
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FileReaderSharedFunctionality::dataurl_format(&blob_contents, blob.Type().to_string());
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Ok(output)
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}
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#[allow(unsafe_code)]
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// https://w3c.github.io/FileAPI/#readAsArrayBufferSyncSection
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unsafe fn ReadAsArrayBuffer(
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&self,
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cx: *mut JSContext,
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blob: &Blob,
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) -> Fallible<NonNull<JSObject>> {
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// step 1
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let blob_contents = FileReaderSync::get_blob_bytes(blob)?;
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// step 2
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rooted!(in(cx) let mut array_buffer = ptr::null_mut::<JSObject>());
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assert!(
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ArrayBuffer::create(
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cx,
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CreateWith::Slice(&blob_contents),
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array_buffer.handle_mut()
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).is_ok()
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);
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Ok(NonNull::new_unchecked(array_buffer.get()))
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}
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}
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