Rename to ExecutionWorlds

src/browser/session.zig

@@ -49,14 +49,14 @@ pub const Session = struct {
     // page and start another.
     transfer_arena: Allocator,
 
-    executor: Env.Executor,
+    executor: Env.ExecutionWorld,
     storage_shed: storage.Shed,
     cookie_jar: storage.CookieJar,
 
     page: ?Page = null,
 
     pub fn init(self: *Session, browser: *Browser) !void {
-        var executor = try browser.env.newExecutor();
+        var executor = try browser.env.newExecutionWorld();
         errdefer executor.deinit();
 
         const allocator = browser.app.allocator;

src/cdp/cdp.zig

@@ -372,12 +372,11 @@ pub fn BrowserContext(comptime CDP_T: type) type {
                 return error.CurrentlyOnly1IsolatedWorldSupported;
             }
 
-            var executor = try self.cdp.browser.env.newExecutor();
+            var executor = try self.cdp.browser.env.newExecutionWorld();
             errdefer executor.deinit();
 
             self.isolated_world = .{
                 .name = try self.arena.dupe(u8, world_name),
-                .scope = null,
                 .executor = executor,
                 .grant_universal_access = grant_universal_access,
             };
@@ -511,18 +510,15 @@ pub fn BrowserContext(comptime CDP_T: type) type {
 /// An object id is unique across all contexts, different object ids can refer to the same Node in different contexts.
 const IsolatedWorld = struct {
     name: []const u8,
-    scope: ?*Env.Scope,
+    executor: Env.ExecutionWorld,
-    executor: Env.Executor,
     grant_universal_access: bool,
 
     pub fn deinit(self: *IsolatedWorld) void {
         self.executor.deinit();
-        self.scope = null;
     }
     pub fn removeContext(self: *IsolatedWorld) !void {
-        if (self.scope == null) return error.NoIsolatedContextToRemove;
+        if (self.executor.scope == null) return error.NoIsolatedContextToRemove;
         self.executor.endScope();
-        self.scope = null;
     }
 
     // The isolate world must share at least some of the state with the related page, specifically the DocumentHTML
@@ -531,8 +527,8 @@ const IsolatedWorld = struct {
     // This also means this pointer becomes invalid after removePage untill a new page is created.
     // Currently we have only 1 page/frame and thus also only 1 state in the isolate world.
     pub fn createContext(self: *IsolatedWorld, page: *Page) !void {
-        if (self.scope != null) return error.Only1IsolatedContextSupported;
+        if (self.executor.scope != null) return error.Only1IsolatedContextSupported;
-        self.scope = try self.executor.startScope(&page.window, &page.state, {}, false);
+        _ = try self.executor.startScope(&page.window, &page.state, {}, false);
     }
 };
 

src/cdp/domains/dom.zig

@@ -262,8 +262,8 @@ fn resolveNode(cmd: anytype) !void {
     var scope = page.scope;
     if (params.executionContextId) |context_id| {
         if (scope.context.debugContextId() != context_id) {
-            const isolated_world = bc.isolated_world orelse return error.ContextNotFound;
+            var isolated_world = bc.isolated_world orelse return error.ContextNotFound;
-            scope = isolated_world.scope orelse return error.ContextNotFound;
+            scope = &(isolated_world.executor.scope orelse return error.ContextNotFound);
 
             if (scope.context.debugContextId() != context_id) return error.ContextNotFound;
         }

src/cdp/domains/page.zig

@@ -115,7 +115,7 @@ fn createIsolatedWorld(cmd: anytype) !void {
     const world = try bc.createIsolatedWorld(params.worldName, params.grantUniveralAccess);
     const page = bc.session.currentPage() orelse return error.PageNotLoaded;
     try pageCreated(bc, page);
-    const scope = world.scope.?;
+    const scope = &world.executor.scope.?;
 
     // Create the auxdata json for the contextCreated event
     // Calling contextCreated will assign a Id to the context and send the contextCreated event
@@ -236,7 +236,7 @@ pub fn pageNavigate(bc: anytype, event: *const Notification.PageNavigate) !void
         const aux_json = try std.fmt.bufPrint(&buffer, "{{\"isDefault\":false,\"type\":\"isolated\",\"frameId\":\"{s}\"}}", .{target_id});
         // Calling contextCreated will assign a new Id to the context and send the contextCreated event
         bc.inspector.contextCreated(
-            isolated_world.scope.?,
+            &isolated_world.executor.scope.?,
             isolated_world.name,
             "://",
             aux_json,
@@ -258,7 +258,7 @@ pub fn pageCreated(bc: anytype, page: *Page) !void {
         try isolated_world.createContext(page);
 
         const polyfill = @import("../../browser/polyfill/polyfill.zig");
-        try polyfill.load(bc.arena, isolated_world.scope.?);
+        try polyfill.load(bc.arena, &isolated_world.executor.scope.?);
     }
 }
 

src/runtime/js.zig

@@ -53,8 +53,8 @@ pub const Platform = struct {
 
 // The Env maps to a V8 isolate, which represents a isolated sandbox for
 // executing JavaScript. The Env is where we'll define our V8 <-> Zig bindings,
-// and it's where we'll start Executors, which actually execute JavaScript.
+// and it's where we'll start ExecutionWorlds, which actually execute JavaScript.
-// The `S` parameter is arbitrary state. When we start an Executor, an instance
+// The `S` parameter is arbitrary state. When we start an ExecutionWorld, an instance
 // of S must be given. This instance is available to any Zig binding.
 // The `types` parameter is a tuple of Zig structures we want to bind to V8.
 pub fn Env(comptime State: type, comptime WebApis: type) type {
@@ -259,7 +259,7 @@ pub fn Env(comptime State: type, comptime WebApis: type) type {
             self.isolate.performMicrotasksCheckpoint();
         }
 
-        pub fn newExecutor(self: *Self) !Executor {
+        pub fn newExecutionWorld(self: *Self) !ExecutionWorld {
             return .{
                 .env = self,
                 .scope = null,
@@ -280,32 +280,35 @@ pub fn Env(comptime State: type, comptime WebApis: type) type {
             self.isolate.lowMemoryNotification();
         }
 
-        pub const Executor = struct {
+        // ExecutionWorld closely models a JS World.
+        // https://chromium.googlesource.com/chromium/src/+/master/third_party/blink/renderer/bindings/core/v8/V8BindingDesign.md#World
+        // https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/scripting/ExecutionWorld
+        pub const ExecutionWorld = struct {
             env: *Self,
 
             // Arena whose lifetime is for a single getter/setter/function/etc.
             // Largely used to get strings out of V8, like a stack trace from
             // a TryCatch. The allocator will be owned by the Scope, but the
-            // arena itself is owned by the Executor so that we can re-use it
+            // arena itself is owned by the ExecutionWorld so that we can re-use it
             // from scope to scope.
             call_arena: ArenaAllocator,
 
             // Arena whose lifetime is for a single page load, aka a Scope. Where
             // the call_arena lives for a single function call, the scope_arena
             // lives for the lifetime of the entire page. The allocator will be
-            // owned by the Scope, but the arena itself is owned by the Executor
+            // owned by the Scope, but the arena itself is owned by the ExecutionWorld
             // so that we can re-use it from scope to scope.
             scope_arena: ArenaAllocator,
 
             // A Scope maps to a Browser's Page. Here though, it's only a
-            // mechanism to organization page-specific memory. The Executor
+            // mechanism to organization page-specific memory. The ExecutionWorld
             // does all the work, but having all page-specific data structures
             // grouped together helps keep things clean.
             scope: ?Scope = null,
 
-            // no init, must be initialized via env.newExecutor()
+            // no init, must be initialized via env.newExecutionWorld()
 
-            pub fn deinit(self: *Executor) void {
+            pub fn deinit(self: *ExecutionWorld) void {
                 if (self.scope != null) {
                     self.endScope();
                 }
@@ -320,7 +323,7 @@ pub fn Env(comptime State: type, comptime WebApis: type) type {
             // when the handle_scope is freed.
             // We also maintain our own "scope_arena" which allows us to have
             // all page related memory easily managed.
-            pub fn startScope(self: *Executor, global: anytype, state: State, module_loader: anytype, enter: bool) !*Scope {
+            pub fn startScope(self: *ExecutionWorld, global: anytype, state: State, module_loader: anytype, enter: bool) !*Scope {
                 std.debug.assert(self.scope == null);
 
                 const ModuleLoader = switch (@typeInfo(@TypeOf(module_loader))) {
@@ -338,9 +341,9 @@ pub fn Env(comptime State: type, comptime WebApis: type) type {
                 const Global = @TypeOf(global.*);
 
                 var context: v8.Context = blk: {
-                    var handle_scope: v8.HandleScope = undefined;
+                    var temp_scope: v8.HandleScope = undefined;
-                    v8.HandleScope.init(&handle_scope, isolate);
+                    v8.HandleScope.init(&temp_scope, isolate);
-                    defer handle_scope.deinit();
+                    defer temp_scope.deinit();
 
                     const js_global = v8.FunctionTemplate.initDefault(isolate);
                     attachClass(Global, isolate, js_global);
@@ -466,7 +469,7 @@ pub fn Env(comptime State: type, comptime WebApis: type) type {
                 return scope;
             }
 
-            pub fn endScope(self: *Executor) void {
+            pub fn endScope(self: *ExecutionWorld) void {
                 self.scope.?.deinit();
                 self.scope = null;
                 _ = self.scope_arena.reset(.{ .retain_with_limit = SCOPE_ARENA_RETAIN });
@@ -1517,7 +1520,7 @@ pub fn Env(comptime State: type, comptime WebApis: type) type {
             }
 
             // Retrieves the RemoteObject for a given value.
-            // The value is loaded through the Executor's mapZigInstanceToJs function,
+            // The value is loaded through the ExecutionWorld's mapZigInstanceToJs function,
             // just like a method return value. Therefore, if we've mapped this
             // value before, we'll get the existing JS PersistedObject and if not
             // we'll create it and track it for cleanup when the scope ends.
@@ -2198,7 +2201,7 @@ fn isEmpty(comptime T: type) bool {
 }
 
 // Responsible for calling Zig functions from JS invokations. This could
-// probably just contained in Executor, but having this specific logic, which
+// probably just contained in ExecutionWorld, but having this specific logic, which
 // is somewhat repetitive between constructors, functions, getters, etc contained
 // here does feel like it makes it clenaer.
 fn Caller(comptime E: type, comptime State: type) type {

src/runtime/testing.zig

@@ -30,7 +30,7 @@ pub fn Runner(comptime State: type, comptime Global: type, comptime types: anyty
     return struct {
         env: *Env,
         scope: *Env.Scope,
-        executor: Env.Executor,
+        executor: Env.ExecutionWorld,
 
         pub const Env = js.Env(State, struct {
             pub const Interfaces = AdjustedTypes;
@@ -45,7 +45,7 @@ pub fn Runner(comptime State: type, comptime Global: type, comptime types: anyty
             self.env = try Env.init(allocator, .{});
             errdefer self.env.deinit();
 
-            self.executor = try self.env.newExecutor();
+            self.executor = try self.env.newExecutionWorld();
             errdefer self.executor.deinit();
 
             self.scope = try self.executor.startScope(

src/testing.zig

@@ -383,7 +383,7 @@ pub const JsRunner = struct {
     renderer: Renderer,
     http_client: HttpClient,
     scope: *Env.Scope,
-    executor: Env.Executor,
+    executor: Env.ExecutionWorld,
     storage_shelf: storage.Shelf,
     cookie_jar: storage.CookieJar,
 
@@ -435,7 +435,7 @@ pub const JsRunner = struct {
             .tls_verify_host = false,
         });
 
-        self.executor = try self.env.newExecutor();
+        self.executor = try self.env.newExecutionWorld();
         errdefer self.executor.deinit();
 
         self.scope = try self.executor.startScope(&self.window, &self.state, {}, true);