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Lazyloaded images are now loaded at compilation, with placeholders omitted

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This commit is contained in:
Emi Simpson 2019-12-09 19:40:29 -05:00
parent feb37f5812
commit 292221ea28
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GPG Key ID: 68FAB2E2E6DFC98B
1 changed files with 44 additions and 29 deletions
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73
src/html.rs
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@ -2,7 +2,7 @@ use html5ever::interface::QualName;
use html5ever::parse_document;
use html5ever::rcdom::{Handle, NodeData, RcDom};
use html5ever::serialize::{serialize, SerializeOpts};
use html5ever::tendril::{format_tendril, TendrilSink};
use html5ever::tendril::{format_tendril, Tendril, TendrilSink};
use html5ever::tree_builder::{Attribute, TreeSink};
use html5ever::{local_name, namespace_url, ns};
use http::retrieve_asset;
@ -157,36 +157,51 @@ pub fn walk_and_embed_assets(
}
}
"img" => {
for attr in attrs_mut.iter_mut() {
if &attr.name.local == "src" || &attr.name.local == "data-src" {
let value = attr.value.to_string();
// Ignore images with empty source
if value == EMPTY_STRING.clone() {
continue;
}
if opt_no_images {
attr.value.clear();
attr.value.push_slice(TRANSPARENT_PIXEL);
} else {
let src_full_url: String =
resolve_url(&url, &value).unwrap_or(EMPTY_STRING.clone());
let (img_dataurl, _) = retrieve_asset(
cache,
&src_full_url,
true,
"",
opt_user_agent,
opt_silent,
opt_insecure,
)
.unwrap_or((EMPTY_STRING.clone(), EMPTY_STRING.clone()));
attr.value.clear();
attr.value.push_slice(img_dataurl.as_str());
}
// Find source tags
let mut found_src: Option<Attribute> = None;
let mut found_datasrc: Option<Attribute> = None;
let mut i = 0;
while i < attrs_mut.len() {
let name = attrs_mut[i].name.local.as_ref();
if name.eq_ignore_ascii_case("src") {
found_src = Some(attrs_mut.remove(i));
} else if name.eq_ignore_ascii_case("data-src") {
found_datasrc = Some(attrs_mut.remove(i));
} else {
i += 1;
}
}
// If images are disabled, clear both sources
if opt_no_images {
attrs_mut.push(Attribute {
name: QualName::new(None, ns!(), local_name!("src")),
value: Tendril::from_slice(TRANSPARENT_PIXEL),
});
} else if let Some((dataurl, _)) = (&found_datasrc)
.into_iter()
.chain(&found_src) // Give dataurl priority
.map(|attr| &attr.value)
.filter(|src| !src.is_empty()) // Ignore empty srcs
.next()
.and_then(|src| resolve_url(&url, src).ok()) //Make absolute
.and_then(|abs_src| // Download and convert to dataurl
retrieve_asset(
cache,
&abs_src,
true,
"",
opt_user_agent,
opt_silent,
opt_insecure,
).ok())
{
// Add the new dataurl src attribute
attrs_mut.push(Attribute {
name: QualName::new(None, ns!(), local_name!("src")),
value: Tendril::from_slice(dataurl.as_ref()),
});
}
}
"source" => {
for attr in attrs_mut.iter_mut() {