Debug Render Tree (for Ember Inspector)

.eslintrc.js

@@ -64,6 +64,7 @@ module.exports = {
       rules: {
         // the TypeScript compiler already takes care of this and
         // leaving it enabled results in false positives for interface imports
+        'no-dupe-class-members': 'off',
         'no-unused-vars': 'off',
         'no-undef': 'off',
 

.travis.yml

@@ -82,6 +82,12 @@ jobs:
         - yarn ember build -prod
         - yarn test
 
+    - name: Production (All Tests + Canary Features + Debug Render Tree)
+      env: DEBUG_RENDER_TREE=true
+      script:
+        - yarn ember build -prod
+        - yarn test
+
     - name: Old Jquery and Extend Prototypes
       env: TEST_SUITE=old-jquery-and-extend-prototypes
       script:

bin/run-tests.js

@@ -35,6 +35,10 @@ function getBrowserRunner() {
 }
 
 function run(queryString) {
+  if (process.env.DEBUG_RENDER_TREE) {
+    queryString = `${queryString}&debugrendertree`;
+  }
+
   let url = 'http://localhost:' + PORT + '/tests/?' + queryString;
   return runInBrowser(url, 3);
 }

packages/@ember/-internals/environment/lib/env.ts

@@ -1,4 +1,5 @@
 import { FUNCTION_PROTOTYPE_EXTENSIONS } from '@ember/deprecated-features';
+import { DEBUG } from '@glimmer/env';
 import global from './global';
 
 /**
@@ -98,6 +99,39 @@ export const ENV = {
   */
   _TEMPLATE_ONLY_GLIMMER_COMPONENTS: false,
 
+  /**
+    Whether to perform extra bookkeeping needed to make the `captureRenderTree`
+    API work.
+
+    This has to be set before the ember JavaScript code is evaluated. This is
+    usually done by setting `window.EmberENV = { _DEBUG_RENDER_TREE: true };`
+    or `window.ENV = { _DEBUG_RENDER_TREE: true };` before the "vendor"
+    `<script>` tag in `index.html`.
+
+    Setting the flag after Ember is already loaded will not work correctly. It
+    may appear to work somewhat, but fundamentally broken.
+
+    This is not intended to be set directly. Ember Inspector will enable the
+    flag on behalf of the user as needed.
+
+    This flag is always on in development mode.
+
+    The flag is off by default in production mode, due to the cost associated
+    with the the bookkeeping work.
+
+    The expected flow is that Ember Inspector will ask the user to refresh the
+    page after enabling the feature. It could also offer a feature where the
+    user add some domains to the "always on" list. In either case, Ember
+    Inspector will inject the code on the page to set the flag if needed.
+
+    @property _DEBUG_RENDER_TREE
+    @for EmberENV
+    @type Boolean
+    @default false
+    @private
+  */
+  _DEBUG_RENDER_TREE: DEBUG,
+
   /**
     Whether the app is using jQuery. See RFC #294.
 
@@ -203,6 +237,10 @@ export const ENV = {
       ENV.FEATURES[feature] = FEATURES[feature] === true;
     }
   }
+
+  if (DEBUG) {
+    ENV._DEBUG_RENDER_TREE = true;
+  }
 })(global.EmberENV || global.ENV);
 
 export function getENV() {

packages/@ember/-internals/glimmer/index.ts

@@ -388,11 +388,12 @@ export { default as AbstractComponentManager } from './lib/component-managers/ab
 // it supports for example
 export { UpdatableReference, INVOKE } from './lib/utils/references';
 export { default as iterableFor } from './lib/utils/iterable';
-export { default as DebugStack } from './lib/utils/debug-stack';
+export { default as getDebugStack, DebugStack } from './lib/utils/debug-stack';
 export { default as OutletView } from './lib/views/outlet';
 export { capabilities } from './lib/component-managers/custom';
 export { setComponentManager, getComponentManager } from './lib/utils/custom-component-manager';
 export { setModifierManager, getModifierManager } from './lib/utils/custom-modifier-manager';
 export { capabilities as modifierCapabilities } from './lib/modifiers/custom';
 export { isSerializationFirstNode } from './lib/utils/serialization-first-node-helpers';
 export { setComponentTemplate, getComponentTemplate } from './lib/utils/component-template';
+export { CapturedRenderNode } from './lib/utils/debug-render-tree';

packages/@ember/-internals/glimmer/lib/component-managers/abstract.ts

@@ -1,4 +1,3 @@
-import { DEBUG } from '@glimmer/env';
 import { ComponentCapabilities, Simple } from '@glimmer/interfaces';
 import { Tag, VersionedPathReference } from '@glimmer/reference';
 import {
@@ -11,20 +10,14 @@ import {
   PreparedArguments,
 } from '@glimmer/runtime';
 import { Destroyable, Opaque, Option } from '@glimmer/util';
-import DebugStack from '../utils/debug-stack';
+import { DebugStack } from '../utils/debug-stack';
 
 // implements the ComponentManager interface as defined in glimmer:
 // tslint:disable-next-line:max-line-length
 // https://github.com/glimmerjs/glimmer-vm/blob/v0.24.0-beta.4/packages/%40glimmer/runtime/lib/component/interfaces.ts#L21
 
 export default abstract class AbstractManager<T, U> implements ComponentManager<T, U> {
-  public debugStack: typeof DebugStack;
-  public _pushToDebugStack!: (name: string, environment: any) => void;
-  public _pushEngineToDebugStack!: (name: string, environment: any) => void;
-
-  constructor() {
-    this.debugStack = undefined;
-  }
+  public debugStack: DebugStack | undefined = undefined;
 
   prepareArgs(_state: U, _args: Arguments): Option<PreparedArguments> {
     return null;
@@ -83,15 +76,3 @@ export default abstract class AbstractManager<T, U> implements ComponentManager<
 
   abstract getDestructor(bucket: T): Option<Destroyable>;
 }
-
-if (DEBUG) {
-  AbstractManager.prototype._pushToDebugStack = function(name: string, environment) {
-    this.debugStack = environment.debugStack;
-    this.debugStack.push(name);
-  };
-
-  AbstractManager.prototype._pushEngineToDebugStack = function(name: string, environment) {
-    this.debugStack = environment.debugStack;
-    this.debugStack.pushEngine(name);
-  };
-}

packages/@ember/-internals/glimmer/lib/component-managers/curly.ts

@@ -1,4 +1,5 @@
 import { privatize as P } from '@ember/-internals/container';
+import { ENV } from '@ember/-internals/environment';
 import { getOwner } from '@ember/-internals/owner';
 import { guidFor } from '@ember/-internals/utils';
 import {
@@ -239,7 +240,7 @@ export default class CurlyComponentManager
     hasBlock: boolean
   ): ComponentStateBucket {
     if (DEBUG) {
-      this._pushToDebugStack(`component:${state.name}`, environment);
+      environment.debugStack.push(`component:${state.name}`);
     }
 
     // Get the nearest concrete component instance from the scope. "Virtual"
@@ -275,6 +276,12 @@ export default class CurlyComponentManager
       props.layout = state.template;
     }
 
+    // caller:
+    // <FaIcon @name="bug" />
+    //
+    // callee:
+    // <i class="fa-{{@name}}"></i>
+
     // Now that we've built up all of the properties to set on the component instance,
     // actually create it.
     let component = factory.create(props);
@@ -330,6 +337,15 @@ export default class CurlyComponentManager
       component.trigger('willRender');
     }
 
+    if (ENV._DEBUG_RENDER_TREE) {
+      environment.debugRenderTree.create(bucket, {
+        type: 'component',
+        name: state.name,
+        args: args.capture(),
+        instance: component,
+      });
+    }
+
     return bucket;
   }
 
@@ -388,8 +404,12 @@ export default class CurlyComponentManager
     bucket.component[BOUNDS] = bounds;
     bucket.finalize();
 
+    if (ENV._DEBUG_RENDER_TREE) {
+      bucket.environment.debugRenderTree.didRender(bucket, bounds);
+    }
+
     if (DEBUG) {
-      this.debugStack.pop();
+      bucket.environment.debugStack.pop();
     }
   }
 
@@ -408,8 +428,12 @@ export default class CurlyComponentManager
   update(bucket: ComponentStateBucket): void {
     let { component, args, argsRevision, environment } = bucket;
 
+    if (ENV._DEBUG_RENDER_TREE) {
+      environment.debugRenderTree.update(bucket);
+    }
+
     if (DEBUG) {
-      this._pushToDebugStack(component._debugContainerKey, environment);
+      environment.debugStack.push(component._debugContainerKey);
     }
 
     bucket.finalizer = _instrumentStart('render.component', rerenderInstrumentDetails, component);
@@ -433,11 +457,15 @@ export default class CurlyComponentManager
     }
   }
 
-  didUpdateLayout(bucket: ComponentStateBucket): void {
+  didUpdateLayout(bucket: ComponentStateBucket, bounds: Bounds): void {
     bucket.finalize();
 
+    if (ENV._DEBUG_RENDER_TREE) {
+      bucket.environment.debugRenderTree.didRender(bucket, bounds);
+    }
+
     if (DEBUG) {
-      this.debugStack.pop();
+      bucket.environment.debugStack.pop();
     }
   }
 
@@ -448,8 +476,17 @@ export default class CurlyComponentManager
     }
   }
 
-  getDestructor(stateBucket: ComponentStateBucket): Option<Destroyable> {
-    return stateBucket;
+  getDestructor(bucket: ComponentStateBucket): Option<Destroyable> {
+    if (ENV._DEBUG_RENDER_TREE) {
+      return {
+        destroy() {
+          bucket.environment.debugRenderTree.willDestroy(bucket);
+          bucket.destroy();
+        },
+      };
+    } else {
+      return bucket;
+    }
   }
 }
 

packages/@ember/-internals/glimmer/lib/component-managers/custom.ts

@@ -15,13 +15,15 @@ import {
 import { createTag, isConst, PathReference, Tag } from '@glimmer/reference';
 import {
   Arguments,
+  Bounds,
   CapturedArguments,
   ComponentDefinition,
   Invocation,
   WithStaticLayout,
 } from '@glimmer/runtime';
 import { Destroyable } from '@glimmer/util';
 
+import { ENV } from '@ember/-internals/environment';
 import Environment from '../environment';
 import RuntimeResolver from '../resolver';
 import { OwnedTemplate } from '../template';
@@ -184,7 +186,7 @@ export default class CustomComponentManager<ComponentInstance>
       RuntimeResolver
     > {
   create(
-    _env: Environment,
+    env: Environment,
     definition: CustomComponentDefinitionState<ComponentInstance>,
     args: Arguments
   ): CustomComponentState<ComponentInstance> {
@@ -267,10 +269,27 @@ export default class CustomComponentManager<ComponentInstance>
 
     const component = delegate.createComponent(definition.ComponentClass.class, value);
 
-    return new CustomComponentState(delegate, component, capturedArgs, namedArgsProxy);
+    let bucket = new CustomComponentState(delegate, component, capturedArgs, env, namedArgsProxy);
+
+    if (ENV._DEBUG_RENDER_TREE) {
+      env.debugRenderTree.create(bucket, {
+        type: 'component',
+        name: definition.name,
+        args: args.capture(),
+        instance: component,
+      });
+    }
+
+    return bucket;
   }
 
-  update({ delegate, component, args, namedArgsProxy }: CustomComponentState<ComponentInstance>) {
+  update(bucket: CustomComponentState<ComponentInstance>) {
+    if (ENV._DEBUG_RENDER_TREE) {
+      bucket.env.debugRenderTree.update(bucket);
+    }
+
+    let { delegate, component, args, namedArgsProxy } = bucket;
+
     let value;
 
     if (EMBER_CUSTOM_COMPONENT_ARG_PROXY) {
@@ -308,18 +327,34 @@ export default class CustomComponentManager<ComponentInstance>
   }
 
   getDestructor(state: CustomComponentState<ComponentInstance>): Option<Destroyable> {
+    let destructor: Option<Destroyable> = null;
+
     if (hasDestructors(state.delegate)) {
-      return state;
-    } else {
-      return null;
+      destructor = state;
     }
+
+    if (ENV._DEBUG_RENDER_TREE) {
+      let inner = destructor;
+
+      destructor = {
+        destroy() {
+          state.env.debugRenderTree.willDestroy(state);
+
+          if (inner) {
+            inner.destroy();
+          }
+        },
+      };
+    }
+
+    return destructor;
   }
 
   getCapabilities({
     delegate,
   }: CustomComponentDefinitionState<ComponentInstance>): ComponentCapabilities {
     return Object.assign({}, CAPABILITIES, {
-      updateHook: delegate.capabilities.updateHook,
+      updateHook: ENV._DEBUG_RENDER_TREE || delegate.capabilities.updateHook,
     });
   }
 
@@ -332,7 +367,17 @@ export default class CustomComponentManager<ComponentInstance>
     }
   }
 
-  didRenderLayout() {}
+  didRenderLayout(bucket: CustomComponentState<ComponentInstance>, bounds: Bounds) {
+    if (ENV._DEBUG_RENDER_TREE) {
+      bucket.env.debugRenderTree.didRender(bucket, bounds);
+    }
+  }
+
+  didUpdateLayout(bucket: CustomComponentState<ComponentInstance>, bounds: Bounds) {
+    if (ENV._DEBUG_RENDER_TREE) {
+      bucket.env.debugRenderTree.didRender(bucket, bounds);
+    }
+  }
 
   getLayout(state: DefinitionState<ComponentInstance>): Invocation {
     return {
@@ -351,6 +396,7 @@ export class CustomComponentState<ComponentInstance> {
     public delegate: ManagerDelegate<ComponentInstance>,
     public component: ComponentInstance,
     public args: CapturedArguments,
+    public env: Environment,
     public namedArgsProxy?: {}
   ) {}