feat(core): add initial view engine (#14014)

The new view engine allows our codegen to produce less code,
as it can interpret view definitions during runtime.

The view engine is not feature complete yet, but already
allows to implement a tree benchmark based on it.

Part of #14013

modules/@angular/core/src/view/anchor.ts

@@ -0,0 +1,50 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {NodeData, NodeDef, NodeFlags, NodeType, ViewData, ViewDefinition} from './types';
+
+export function anchorDef(
+    flags: NodeFlags, childCount: number, template?: ViewDefinition): NodeDef {
+  return {
+    type: NodeType.Anchor,
+    // will bet set by the view definition
+    index: undefined,
+    reverseChildIndex: undefined,
+    parent: undefined,
+    childFlags: undefined,
+    bindingIndex: undefined,
+    providerIndices: undefined,
+    // regular values
+    flags,
+    childCount,
+    bindings: [],
+    element: undefined,
+    provider: undefined,
+    text: undefined,
+    component: undefined, template
+  };
+}
+
+export function createAnchor(view: ViewData, renderHost: any, def: NodeDef): NodeData {
+  const parentNode = def.parent != null ? view.nodes[def.parent].renderNode : renderHost;
+  let renderNode: any;
+  if (view.renderer) {
+    renderNode = view.renderer.createTemplateAnchor(parentNode);
+  } else {
+    renderNode = document.createComment('');
+    if (parentNode) {
+      parentNode.appendChild(renderNode);
+    }
+  }
+  return {
+    renderNode,
+    provider: undefined,
+    embeddedViews: (def.flags & NodeFlags.HasEmbeddedViews) ? [] : undefined,
+    componentView: undefined
+  };
+}

modules/@angular/core/src/view/element.ts

@@ -0,0 +1,212 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {SecurityContext} from '../security';
+
+import {BindingDef, BindingType, NodeData, NodeDef, NodeFlags, NodeType, ViewData, ViewFlags} from './types';
+import {checkAndUpdateBinding, setBindingDebugInfo} from './util';
+
+export function elementDef(
+    flags: NodeFlags, childCount: number, name: string, fixedAttrs: {[name: string]: string} = {},
+    bindings: ([BindingType.ElementClass, string] | [BindingType.ElementStyle, string, string] | [
+      BindingType.ElementAttribute | BindingType.ElementProperty, string, SecurityContext
+    ])[] = []): NodeDef {
+  const bindingDefs = new Array(bindings.length);
+  for (let i = 0; i < bindings.length; i++) {
+    const entry = bindings[i];
+    let bindingDef: BindingDef;
+    const bindingType = entry[0];
+    const name = entry[1];
+    let securityContext: SecurityContext;
+    let suffix: string;
+    switch (bindingType) {
+      case BindingType.ElementStyle:
+        suffix = <string>entry[2];
+        break;
+      case BindingType.ElementAttribute:
+      case BindingType.ElementProperty:
+        securityContext = <SecurityContext>entry[2];
+        break;
+    }
+    bindingDefs[i] = {type: bindingType, name, nonMinfiedName: name, securityContext, suffix};
+  }
+  return {
+    type: NodeType.Element,
+    // will bet set by the view definition
+    index: undefined,
+    reverseChildIndex: undefined,
+    parent: undefined,
+    childFlags: undefined,
+    bindingIndex: undefined,
+    providerIndices: undefined,
+    // regular values
+    flags,
+    childCount,
+    bindings: bindingDefs,
+    element: {name, attrs: fixedAttrs},
+    provider: undefined,
+    text: undefined,
+    component: undefined,
+    template: undefined
+  };
+}
+
+export function createElement(view: ViewData, renderHost: any, def: NodeDef): NodeData {
+  const parentNode = def.parent != null ? view.nodes[def.parent].renderNode : renderHost;
+  const elDef = def.element;
+  let el: any;
+  if (view.renderer) {
+    el = view.renderer.createElement(parentNode, elDef.name);
+    if (elDef.attrs) {
+      for (let attrName in elDef.attrs) {
+        view.renderer.setElementAttribute(el, attrName, elDef.attrs[attrName]);
+      }
+    }
+  } else {
+    el = document.createElement(elDef.name);
+    if (parentNode) {
+      parentNode.appendChild(el);
+    }
+    if (elDef.attrs) {
+      for (let attrName in elDef.attrs) {
+        el.setAttribute(attrName, elDef.attrs[attrName]);
+      }
+    }
+  }
+  return {
+    renderNode: el,
+    provider: undefined,
+    embeddedViews: (def.flags & NodeFlags.HasEmbeddedViews) ? [] : undefined,
+    componentView: undefined
+  };
+}
+
+export function checkAndUpdateElementInline(
+    view: ViewData, def: NodeDef, v0: any, v1: any, v2: any, v3: any, v4: any, v5: any, v6: any,
+    v7: any, v8: any, v9: any) {
+  // Note: fallthrough is intended!
+  switch (def.bindings.length) {
+    case 10:
+      checkAndUpdateElementValue(view, def, 9, v9);
+    case 9:
+      checkAndUpdateElementValue(view, def, 8, v8);
+    case 8:
+      checkAndUpdateElementValue(view, def, 7, v7);
+    case 7:
+      checkAndUpdateElementValue(view, def, 6, v6);
+    case 6:
+      checkAndUpdateElementValue(view, def, 5, v5);
+    case 5:
+      checkAndUpdateElementValue(view, def, 4, v4);
+    case 4:
+      checkAndUpdateElementValue(view, def, 3, v3);
+    case 3:
+      checkAndUpdateElementValue(view, def, 2, v2);
+    case 2:
+      checkAndUpdateElementValue(view, def, 1, v1);
+    case 1:
+      checkAndUpdateElementValue(view, def, 0, v0);
+  }
+}
+
+export function checkAndUpdateElementDynamic(view: ViewData, def: NodeDef, values: any[]) {
+  for (let i = 0; i < values.length; i++) {
+    checkAndUpdateElementValue(view, def, i, values[i]);
+  }
+}
+
+function checkAndUpdateElementValue(view: ViewData, def: NodeDef, bindingIdx: number, value: any) {
+  if (!checkAndUpdateBinding(view, def, bindingIdx, value)) {
+    return;
+  }
+
+  const binding = def.bindings[bindingIdx];
+  const name = binding.name;
+  const renderNode = view.nodes[def.index].renderNode;
+  switch (binding.type) {
+    case BindingType.ElementAttribute:
+      setElementAttribute(view, binding, renderNode, name, value);
+      break;
+    case BindingType.ElementClass:
+      setElementClass(view, renderNode, name, value);
+      break;
+    case BindingType.ElementStyle:
+      setElementStyle(view, binding, renderNode, name, value);
+      break;
+    case BindingType.ElementProperty:
+      setElementProperty(view, binding, renderNode, name, value);
+      break;
+  }
+}
+
+function setElementAttribute(
+    view: ViewData, binding: BindingDef, renderNode: any, name: string, value: any) {
+  const securityContext = binding.securityContext;
+  let renderValue = securityContext ? view.services.sanitize(securityContext, value) : value;
+  renderValue = renderValue != null ? renderValue.toString() : null;
+  if (view.renderer) {
+    view.renderer.setElementAttribute(renderNode, name, renderValue);
+  } else {
+    if (value != null) {
+      renderNode.setAttribute(name, renderValue);
+    } else {
+      renderNode.removeAttribute(name);
+    }
+  }
+}
+
+function setElementClass(view: ViewData, renderNode: any, name: string, value: boolean) {
+  if (view.renderer) {
+    view.renderer.setElementClass(renderNode, name, value);
+  } else {
+    if (value) {
+      renderNode.classList.add(name);
+    } else {
+      renderNode.classList.remove(name);
+    }
+  }
+}
+
+function setElementStyle(
+    view: ViewData, binding: BindingDef, renderNode: any, name: string, value: any) {
+  let renderValue = view.services.sanitize(SecurityContext.STYLE, value);
+  if (renderValue != null) {
+    renderValue = renderValue.toString();
+    const unit = binding.suffix;
+    if (unit != null) {
+      renderValue = renderValue + unit;
+    }
+  } else {
+    renderValue = null;
+  }
+  if (view.renderer) {
+    view.renderer.setElementStyle(renderNode, name, renderValue);
+  } else {
+    if (renderValue != null) {
+      renderNode.style[name] = renderValue;
+    } else {
+      // IE requires '' instead of null
+      // see https://github.com/angular/angular/issues/7916
+      (renderNode.style as any)[name] = '';
+    }
+  }
+}
+
+function setElementProperty(
+    view: ViewData, binding: BindingDef, renderNode: any, name: string, value: any) {
+  const securityContext = binding.securityContext;
+  let renderValue = securityContext ? view.services.sanitize(securityContext, value) : value;
+  if (view.renderer) {
+    view.renderer.setElementProperty(renderNode, name, renderValue);
+    if (view.def.flags & ViewFlags.LogBindingUpdate) {
+      setBindingDebugInfo(view.renderer, renderNode, name, renderValue);
+    }
+  } else {
+    renderNode[name] = renderValue;
+  }
+}

modules/@angular/core/src/view/index.ts

@@ -0,0 +1,17 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+export {anchorDef} from './anchor';
+export {elementDef} from './element';
+export {providerDef} from './provider';
+export {textDef} from './text';
+export {checkAndUpdateView, checkNoChangesView, createEmbeddedView, createRootView, destroyView, viewDef} from './view';
+export {attachEmbeddedView, detachEmbeddedView, rootRenderNodes} from './view_attach';
+
+export * from './types';
+export {DefaultServices} from './services';