Auto merge of #20146 - bholley:explicit_load_data, r=bholley

Stylo: Pass an explicit parent SheetLoadData for child stylesheet loads

https://bugzilla.mozilla.org/show_bug.cgi?id=1441896

components/style/gecko/generated/bindings.rs

@@ -235,6 +235,7 @@ use gecko_bindings::structs::nscoord;
 use gecko_bindings::structs::nsresult;
 use gecko_bindings::structs::Loader;
 use gecko_bindings::structs::LoaderReusableStyleSheets;
+use gecko_bindings::structs::SheetLoadData;
 use gecko_bindings::structs::ServoStyleSheet;
 use gecko_bindings::structs::ServoComputedData;
 use gecko_bindings::structs::ServoStyleContext;
@@ -664,6 +665,7 @@ extern "C" {
     pub fn Gecko_LoadStyleSheet(
         loader: *mut Loader,
         parent: *mut ServoStyleSheet,
+        parent_load_data: *mut SheetLoadData,
         reusable_sheets: *mut LoaderReusableStyleSheets,
         base_url_data: *mut RawGeckoURLExtraData,
         url_bytes: *const u8,
@@ -2093,6 +2095,7 @@ extern "C" {
     pub fn Servo_StyleSheet_FromUTF8Bytes(
         loader: *mut Loader,
         gecko_stylesheet: *mut ServoStyleSheet,
+        load_data: *mut SheetLoadData,
         data: *const u8,
         data_len: usize,
         parsing_mode: SheetParsingMode,

ports/geckolib/glue.rs

@@ -90,7 +90,7 @@ use style::gecko_bindings::structs;
 use style::gecko_bindings::structs::{CallerType, CSSPseudoElementType, CompositeOperation};
 use style::gecko_bindings::structs::{Loader, LoaderReusableStyleSheets};
 use style::gecko_bindings::structs::{RawServoStyleRule, ServoStyleContextStrong, RustString};
-use style::gecko_bindings::structs::{ServoStyleSheet, SheetParsingMode, nsAtom, nsCSSPropertyID};
+use style::gecko_bindings::structs::{ServoStyleSheet, SheetLoadData, SheetParsingMode, nsAtom, nsCSSPropertyID};
 use style::gecko_bindings::structs::{nsCSSFontDesc, nsCSSFontFaceRule, nsCSSCounterStyleRule};
 use style::gecko_bindings::structs::{nsRestyleHint, nsChangeHint, PropertyValuePair};
 use style::gecko_bindings::structs::AtomArray;
@@ -1067,10 +1067,14 @@ pub extern "C" fn Servo_StyleSheet_Empty(mode: SheetParsingMode) -> RawServoStyl
     ).into_strong()
 }
 
+/// Note: The load_data corresponds to this sheet, and is passed as the parent
+/// load data for child sheet loads. It may be null for certain cases where we
+/// know we won't have child loads.
 #[no_mangle]
 pub extern "C" fn Servo_StyleSheet_FromUTF8Bytes(
     loader: *mut Loader,
     stylesheet: *mut ServoStyleSheet,
+    load_data: *mut SheetLoadData,
     data: *const u8,
     data_len: usize,
     mode: SheetParsingMode,
@@ -1094,7 +1098,7 @@ pub extern "C" fn Servo_StyleSheet_FromUTF8Bytes(
     let loader = if loader.is_null() {
         None
     } else {
-        Some(StylesheetLoader::new(loader, stylesheet, reusable_sheets))
+        Some(StylesheetLoader::new(loader, stylesheet, load_data, reusable_sheets))
     };
 
     // FIXME(emilio): loader.as_ref() doesn't typecheck for some reason?
@@ -1538,7 +1542,7 @@ pub extern "C" fn Servo_CssRules_InsertRule(
     let loader = if loader.is_null() {
         None
     } else {
-        Some(StylesheetLoader::new(loader, gecko_stylesheet, ptr::null_mut()))
+        Some(StylesheetLoader::new(loader, gecko_stylesheet, ptr::null_mut(), ptr::null_mut()))
     };
     let loader = loader.as_ref().map(|loader| loader as &StyleStylesheetLoader);
     let rule = unsafe { rule.as_ref().unwrap().as_str_unchecked() };

ports/geckolib/stylesheet_loader.rs

@@ -6,7 +6,7 @@ use cssparser::SourceLocation;
 use servo_arc::Arc;
 use style::gecko::data::GeckoStyleSheet;
 use style::gecko_bindings::bindings::Gecko_LoadStyleSheet;
-use style::gecko_bindings::structs::{Loader, ServoStyleSheet, LoaderReusableStyleSheets};
+use style::gecko_bindings::structs::{Loader, ServoStyleSheet, SheetLoadData, LoaderReusableStyleSheets};
 use style::gecko_bindings::sugar::ownership::FFIArcHelpers;
 use style::media_queries::MediaList;
 use style::parser::ParserContext;
@@ -15,13 +15,14 @@ use style::stylesheets::{ImportRule, StylesheetLoader as StyleStylesheetLoader};
 use style::stylesheets::import_rule::ImportSheet;
 use style::values::specified::url::SpecifiedUrl;
 
-pub struct StylesheetLoader(*mut Loader, *mut ServoStyleSheet, *mut LoaderReusableStyleSheets);
+pub struct StylesheetLoader(*mut Loader, *mut ServoStyleSheet, *mut SheetLoadData, *mut LoaderReusableStyleSheets);
 
 impl StylesheetLoader {
     pub fn new(loader: *mut Loader,
                parent: *mut ServoStyleSheet,
+               parent_load_data: *mut SheetLoadData,
                reusable_sheets: *mut LoaderReusableStyleSheets) -> Self {
-        StylesheetLoader(loader, parent, reusable_sheets)
+        StylesheetLoader(loader, parent, parent_load_data, reusable_sheets)
     }
 }
 
@@ -45,6 +46,7 @@ impl StyleStylesheetLoader for StylesheetLoader {
             Gecko_LoadStyleSheet(self.0,
                                  self.1,
                                  self.2,
+                                 self.3,
                                  base_url_data,
                                  spec_bytes,
                                  spec_len as u32,