Add a new RPC call for getting a child browsing context ID

servo · Apr 30, 2018 · 4383b30 · 4383b30
1 parent 847115b
commit 4383b30
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Showing 2 changed files with 11 additions and 0 deletions.
diff --git a/components/constellation/constellation.rs b/components/constellation/constellation.rs
@@ -1231,6 +1231,15 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
                     warn!("Sending reply to get parent info failed ({:?}).", e);
                 }
             }
+            FromScriptMsg::GetChildBrowsingContextId(browsing_context_id, index, sender) => {
+                // We increment here because the 0th element is the parent browsing context itself
+                let result = self.all_descendant_browsing_contexts_iter(browsing_context_id)
+                    .nth(index + 1)
+                    .map(|bc| bc.id);
+                if let Err(e) = sender.send(result) {
+                    warn!("Sending reply to get child browsing context ID failed ({:?}).", e);
+                }
+            }
             FromScriptMsg::RegisterServiceWorker(scope_things, scope) => {
                 debug!("constellation got store registration scope message");
                 self.handle_register_serviceworker(scope_things, scope);

diff --git a/components/script_traits/script_msg.rs b/components/script_traits/script_msg.rs
@@ -90,6 +90,8 @@ pub enum ScriptMsg {
     GetBrowsingContextId(PipelineId, IpcSender<Option<BrowsingContextId>>),
     /// Get the parent info for a given pipeline.
     GetParentInfo(PipelineId, IpcSender<Option<PipelineId>>),
+    /// Get the nth child browsing context ID for a given browsing context, sorted in tree order.
+    GetChildBrowsingContextId(BrowsingContextId, usize, IpcSender<Option<BrowsingContextId>>),
     /// <head> tag finished parsing
     HeadParsed,
     /// All pending loads are complete, and the `load` event for this pipeline