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Use Rc instead of cloning the DOMString

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Specifically, I changed the `text` field of `ScriptOrigin` from a
`DOMString` to an `Rc<DOMString>`. Then I updated all the related code
to work with an `Rc`.

This is just a first pass to get the code to compile. There are probably
more things I can do that will improve the code and further reduce
cloning.
This commit is contained in:
Camelid 2020-07-14 20:32:37 -07:00
parent 12d4c0d5eb
commit 69881e8b06
2 changed files with 21 additions and 19 deletions
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22
components/script/dom/htmlscriptelement.rs
View file

@ -49,6 +49,7 @@ use std::fs::{create_dir_all, read_to_string, File};
use std::io::{Read, Seek, Write};
use std::path::PathBuf;
use std::process::Command;
use std::rc::Rc;
use std::sync::{Arc, Mutex};
use style::str::{StaticStringVec, HTML_SPACE_CHARACTERS};
use uuid::Uuid;
@ -150,14 +151,15 @@ pub enum ScriptType {
#[derive(JSTraceable, MallocSizeOf)]
pub struct ScriptOrigin {
text: DOMString,
#[ignore_malloc_size_of = "Rc is hard"]
text: Rc<DOMString>,
url: ServoUrl,
external: bool,
type_: ScriptType,
}
impl ScriptOrigin {
pub fn internal(text: DOMString, url: ServoUrl, type_: ScriptType) -> ScriptOrigin {
pub fn internal(text: Rc<DOMString>, url: ServoUrl, type_: ScriptType) -> ScriptOrigin {
ScriptOrigin {
text: text,
url: url,
@ -166,7 +168,7 @@ impl ScriptOrigin {
}
}
pub fn external(text: DOMString, url: ServoUrl, type_: ScriptType) -> ScriptOrigin {
pub fn external(text: Rc<DOMString>, url: ServoUrl, type_: ScriptType) -> ScriptOrigin {
ScriptOrigin {
text: text,
url: url,
@ -175,8 +177,8 @@ impl ScriptOrigin {
}
}
pub fn text(&self) -> DOMString {
self.text.clone()
pub fn text(&self) -> Rc<DOMString> {
Rc::clone(&self.text)
}
}
@ -257,7 +259,7 @@ impl FetchResponseListener for ClassicContext {
// Step 7.
let (source_text, _, _) = encoding.decode(&self.data);
ScriptOrigin::external(
DOMString::from(source_text),
Rc::new(DOMString::from(source_text)),
metadata.final_url,
ScriptType::Classic,
)
@ -613,7 +615,7 @@ impl HTMLScriptElement {
// Step 25-1. & 25-2.
let result = Ok(ScriptOrigin::internal(
text.clone(),
Rc::new(text.clone()),
base_url.clone(),
script_type.clone(),
));
@ -647,7 +649,7 @@ impl HTMLScriptElement {
fetch_inline_module_script(
ModuleOwner::Window(Trusted::new(self)),
text.clone(),
Rc::new(text.clone()),
base_url.clone(),
self.id.clone(),
credentials_mode.unwrap(),
@ -679,7 +681,7 @@ impl HTMLScriptElement {
let mut script_content = String::new();
output.seek(std::io::SeekFrom::Start(0)).unwrap();
output.read_to_string(&mut script_content).unwrap();
script.text = DOMString::from(script_content);
script.text = Rc::new(DOMString::from(script_content));
},
_ => {
warn!("Failed to execute js-beautify. Will store unmodified script");
@ -757,7 +759,7 @@ impl HTMLScriptElement {
match read_to_string(path.clone()) {
Ok(local_script) => {
debug!("Found script stored at: {:?}", path);
script.text = DOMString::from(local_script);
script.text = Rc::new(DOMString::from(local_script));
},
Err(why) => warn!("Could not restore script from file {:?}", why),
}