Fix steps numbering of HTMLScriptExecute::prepare

components/script/dom/htmlscriptelement.rs

@@ -40,6 +40,7 @@ use std::ascii::AsciiExt;
 use std::cell::Cell;
 use std::sync::{Arc, Mutex};
 use style::str::{HTML_SPACE_CHARACTERS, StaticStringVec};
+
 #[dom_struct]
 pub struct HTMLScriptElement {
     htmlelement: HTMLElement,
@@ -364,84 +365,90 @@ impl HTMLScriptElement {
             _ => unreachable!()
         };
 
-        // TODO: Step 15: Nonce.
+        // TODO: Step 15: Module script credentials mode.
+
+        // TODO: Step 16: Nonce.
 
-        // Step 16: Integrity Metadata
+        // Step 17: Integrity metadata.
         let im_attribute = element.get_attribute(&ns!(), &local_name!("integrity"));
         let integrity_val = im_attribute.r().map(|a| a.value());
         let integrity_metadata = match integrity_val {
             Some(ref value) => &***value,
             None => "",
         };
 
-        // TODO: Step 17: environment settings object.
+        // TODO: Step 18: parser state.
+
+        // TODO: Step 19: environment settings object.
 
         let base_url = doc.base_url();
-        let is_external = match element.get_attribute(&ns!(), &local_name!("src")) {
-            // Step 18.
-            Some(ref src) => {
-                // Step 18.1.
-                let src = src.value();
-
-                // Step 18.2.
-                if src.is_empty() {
+        let is_external = if let Some(src) = element.get_attribute(&ns!(), &local_name!("src")) {
+            // Step 20.
+
+            // Step 20.1.
+            let src = src.value();
+
+            // Step 20.2.
+            if src.is_empty() {
+                self.queue_error_event();
+                return;
+            }
+
+            // Step 20.3: The "from an external file"" flag is stored in ScriptOrigin.
+
+            // Step 20.4-20.5.
+            let url = match base_url.join(&src) {
+                Ok(url) => url,
+                Err(_) => {
+                    warn!("error parsing URL for script {}", &**src);
                     self.queue_error_event();
                     return;
-                }
-
-                // Step 18.4-18.5.
-                let url = match base_url.join(&src) {
-                    Err(_) => {
-                        warn!("error parsing URL for script {}", &**src);
-                        self.queue_error_event();
-                        return;
-                    }
-                    Ok(url) => url,
-                };
+                },
+            };
 
-                // Step 18.6.
-                fetch_a_classic_script(self, url, cors_setting, integrity_metadata.to_owned(), encoding);
+            // Step 20.6.
+            fetch_a_classic_script(self, url, cors_setting, integrity_metadata.to_owned(), encoding);
 
-                true
-            },
-            // TODO: Step 19.
-            None => false,
+            true
+        } else {
+            // TODO: Step 21.
+            false
         };
 
-        // Step 20.
+        // Step 22.
         let deferred = element.has_attribute(&local_name!("defer"));
-        // Step 20.a: classic, has src, has defer, was parser-inserted, is not async.
+        // Step 22.a: classic, has src, has defer, was parser-inserted, is not async.
         if is_external &&
            deferred &&
            was_parser_inserted &&
            !async {
             doc.add_deferred_script(self);
             // Second part implemented in Document::process_deferred_scripts.
-        // Step 20.b: classic, has src, was parser-inserted, is not async.
+        // Step 22.b: classic, has src, was parser-inserted, is not async.
         } else if is_external &&
                   was_parser_inserted &&
                   !async {
             doc.set_pending_parsing_blocking_script(Some(self));
             // Second part implemented in the load result handler.
-        // Step 20.c: classic, has src, isn't async, isn't non-blocking.
+        // Step 22.c: classic, has src, isn't async, isn't non-blocking.
         } else if is_external &&
                   !async &&
                   !self.non_blocking.get() {
             doc.push_asap_in_order_script(self);
             // Second part implemented in Document::process_asap_scripts.
-        // Step 20.d: classic, has src.
+        // Step 22.d: classic, has src.
         } else if is_external {
             doc.add_asap_script(self);
             // Second part implemented in Document::process_asap_scripts.
-        // Step 20.e: doesn't have src, was parser-inserted, is blocked on stylesheet.
+        // Step 22.e: doesn't have src, was parser-inserted, is blocked on stylesheet.
         } else if !is_external &&
                   was_parser_inserted &&
                   doc.get_current_parser().map_or(false, |parser| parser.script_nesting_level() <= 1) &&
                   doc.get_script_blocking_stylesheets_count() > 0 {
             doc.set_pending_parsing_blocking_script(Some(self));
             *self.load.borrow_mut() = Some(Ok(ScriptOrigin::internal(text, base_url)));
             self.ready_to_be_parser_executed.set(true);
-        // Step 20.f: otherwise.
+        // Step 22.f: otherwise.
         } else {
             assert!(!text.is_empty());
             self.ready_to_be_parser_executed.set(true);