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fix: Don't rely on image handle not being dropped

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It now causes a memory leak, though. :/
This commit is contained in:
Liam Murphy 2021-03-21 15:34:20 +11:00
parent e9d122b1aa
commit 99c56b9bff
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GPG key ID: 792DFA5B236BDF05
1 changed files with 21 additions and 36 deletions
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57
web/src/widget/image.rs
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@ -76,14 +76,21 @@ impl<Message> Widget<Message> for Image {
use dodrio::builder::*;
use dodrio::bumpalo::collections::String;
let src = String::from_str_in(
match self.handle.data.as_ref() {
Data::Path(path) => path.to_str().unwrap_or(""),
Data::ObjectUrl(url) => &url,
},
bump,
)
.into_bump_str();
let src = match self.handle.data.as_ref() {
Data::Path(path) => {
String::from_str_in(path.to_str().unwrap_or(""), bump)
.into_bump_str()
}
Data::Bytes(bytes) => bump.alloc(
Url::create_object_url_with_blob(
&Blob::new_with_u8_array_sequence(&Array::of1(
&Uint8Array::from(bytes.as_slice()),
))
.unwrap(),
)
.unwrap(),
),
};
let alt = String::from_str_in(&self.alt, bump).into_bump_str();
@ -129,23 +136,10 @@ impl Handle {
/// Creates an image [`Handle`] containing the image data directly.
///
/// NOTE: this unnecessarily takes ownership of the data to be compaticle with `iced_native`.
/// If you're only using `iced_web`, you should use `from_slice` instead.
/// This is useful if you already have your image loaded in-memory, maybe
/// because you downloaded or generated it procedurally.
pub fn from_memory(bytes: Vec<u8>) -> Handle {
Handle::from_slice(bytes.as_slice())
}
/// Creates an image [`Handle`] containing the image data directly.
pub fn from_slice(bytes: &[u8]) -> Handle {
// This copies the memory twice (once in Uint8Array::from and once in Blob::new),
// but unsafe code is needed not to do that and #[forbid(unsafe_code)] is on.
let blob = Blob::new_with_u8_array_sequence(&Array::of1(
&Uint8Array::from(bytes),
))
.unwrap();
Self::from_data(Data::ObjectUrl(
Url::create_object_url_with_blob(&blob).unwrap(),
))
Self::from_data(Data::Bytes(bytes))
}
fn from_data(data: Data) -> Handle {
@ -187,24 +181,15 @@ pub enum Data {
/// A remote image
Path(PathBuf),
/// An Object URL pointing to some image data.
ObjectUrl(String),
/// In-memory data
Bytes(Vec<u8>),
}
impl std::fmt::Debug for Data {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Data::Path(path) => write!(f, "Path({:?})", path),
Data::ObjectUrl(url) => write!(f, "ObjectUrl({:?})", url),
}
}
}
impl Drop for Data {
fn drop(&mut self) {
match self {
Data::ObjectUrl(url) => Url::revoke_object_url(&url).unwrap(),
_ => {}
Data::Bytes(_) => write!(f, "Bytes(...)"),
}
}
}