404 lines
18 KiB
TypeScript
404 lines
18 KiB
TypeScript
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/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import * as ts from 'typescript';
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/** Names of the helper functions that are supported for this migration. */
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export const enum HelperFunction {
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any = 'AnyDuringRendererMigration',
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createElement = '__ngRendererCreateElementHelper',
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createText = '__ngRendererCreateTextHelper',
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createTemplateAnchor = '__ngRendererCreateTemplateAnchorHelper',
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projectNodes = '__ngRendererProjectNodesHelper',
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animate = '__ngRendererAnimateHelper',
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destroyView = '__ngRendererDestroyViewHelper',
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detachView = '__ngRendererDetachViewHelper',
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attachViewAfter = '__ngRendererAttachViewAfterHelper',
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splitNamespace = '__ngRendererSplitNamespaceHelper',
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setElementAttribute = '__ngRendererSetElementAttributeHelper'
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}
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/** Gets the string representation of a helper function. */
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export function getHelper(
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name: HelperFunction, sourceFile: ts.SourceFile, printer: ts.Printer): string {
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const helperDeclaration = getHelperDeclaration(name);
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return '\n' + printer.printNode(ts.EmitHint.Unspecified, helperDeclaration, sourceFile) + '\n';
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}
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/** Creates a function declaration for the specified helper name. */
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function getHelperDeclaration(name: HelperFunction): ts.Node {
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switch (name) {
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case HelperFunction.any:
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return createAnyTypeHelper();
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case HelperFunction.createElement:
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return getCreateElementHelper();
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case HelperFunction.createText:
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return getCreateTextHelper();
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case HelperFunction.createTemplateAnchor:
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return getCreateTemplateAnchorHelper();
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case HelperFunction.projectNodes:
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return getProjectNodesHelper();
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case HelperFunction.animate:
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return getAnimateHelper();
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case HelperFunction.destroyView:
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return getDestroyViewHelper();
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case HelperFunction.detachView:
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return getDetachViewHelper();
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case HelperFunction.attachViewAfter:
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return getAttachViewAfterHelper();
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case HelperFunction.setElementAttribute:
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return getSetElementAttributeHelper();
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case HelperFunction.splitNamespace:
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return getSplitNamespaceHelper();
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}
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throw new Error(`Unsupported helper called "${name}".`);
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}
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/** Creates a helper for a custom `any` type during the migration. */
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function createAnyTypeHelper(): ts.TypeAliasDeclaration {
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// type AnyDuringRendererMigration = any;
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return ts.createTypeAliasDeclaration(
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[], [], HelperFunction.any, [], ts.createKeywordTypeNode(ts.SyntaxKind.AnyKeyword));
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}
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/** Creates a function parameter that is typed as `any`. */
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function getAnyTypedParameter(
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parameterName: string | ts.Identifier, isRequired = true): ts.ParameterDeclaration {
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// Declare the parameter as `any` so we don't have to add extra logic to ensure that the
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// generated code will pass type checking. Use our custom `any` type so people have an incentive
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// to clean it up afterwards and to avoid potentially introducing lint warnings in G3.
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const type = ts.createTypeReferenceNode(HelperFunction.any, []);
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return ts.createParameter(
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[], [], undefined, parameterName,
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isRequired ? undefined : ts.createToken(ts.SyntaxKind.QuestionToken), type);
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}
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/** Creates a helper for `createElement`. */
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function getCreateElementHelper(): ts.FunctionDeclaration {
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const renderer = ts.createIdentifier('renderer');
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const parent = ts.createIdentifier('parent');
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const namespaceAndName = ts.createIdentifier('namespaceAndName');
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const name = ts.createIdentifier('name');
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const namespace = ts.createIdentifier('namespace');
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// [namespace, name] = splitNamespace(namespaceAndName);
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const namespaceAndNameVariable = ts.createVariableDeclaration(
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ts.createArrayBindingPattern(
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[namespace, name].map(id => ts.createBindingElement(undefined, undefined, id))),
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undefined,
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ts.createCall(ts.createIdentifier(HelperFunction.splitNamespace), [], [namespaceAndName]));
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// `renderer.createElement(name, namespace)`.
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const creationCall =
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ts.createCall(ts.createPropertyAccess(renderer, 'createElement'), [], [name, namespace]);
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return getCreationHelper(
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HelperFunction.createElement, creationCall, renderer, parent, [namespaceAndName],
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[ts.createVariableStatement(
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undefined,
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ts.createVariableDeclarationList([namespaceAndNameVariable], ts.NodeFlags.Const))]);
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}
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/** Creates a helper for `createText`. */
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function getCreateTextHelper(): ts.FunctionDeclaration {
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const renderer = ts.createIdentifier('renderer');
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const parent = ts.createIdentifier('parent');
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const value = ts.createIdentifier('value');
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// `renderer.createText(value)`.
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const creationCall = ts.createCall(ts.createPropertyAccess(renderer, 'createText'), [], [value]);
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return getCreationHelper(HelperFunction.createText, creationCall, renderer, parent, [value]);
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}
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/** Creates a helper for `createTemplateAnchor`. */
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function getCreateTemplateAnchorHelper(): ts.FunctionDeclaration {
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const renderer = ts.createIdentifier('renderer');
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const parent = ts.createIdentifier('parent');
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// `renderer.createComment('')`.
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const creationCall = ts.createCall(
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ts.createPropertyAccess(renderer, 'createComment'), [], [ts.createStringLiteral('')]);
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return getCreationHelper(HelperFunction.createTemplateAnchor, creationCall, renderer, parent);
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}
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/**
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* Gets the function declaration for a creation helper. This is reused between `createElement`,
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* `createText` and `createTemplateAnchor` which follow a very similar pattern.
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* @param functionName Function that the helper should have.
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* @param creationCall Expression that is used to create a node inside the function.
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* @param rendererParameter Parameter for the `renderer`.
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* @param parentParameter Parameter for the `parent` inside the function.
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* @param extraParameters Extra parameters to be added to the end.
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* @param precedingVariables Extra variables to be added before the one that creates the `node`.
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*/
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function getCreationHelper(
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functionName: HelperFunction, creationCall: ts.CallExpression, renderer: ts.Identifier,
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parent: ts.Identifier, extraParameters: ts.Identifier[] = [],
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precedingVariables: ts.VariableStatement[] = []): ts.FunctionDeclaration {
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const node = ts.createIdentifier('node');
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// `const node = {{creationCall}}`.
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const nodeVariableStatement = ts.createVariableStatement(
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undefined,
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ts.createVariableDeclarationList(
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[ts.createVariableDeclaration(node, undefined, creationCall)], ts.NodeFlags.Const));
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// `if (parent) { renderer.appendChild(parent, node) }`.
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const guardedAppendChildCall = ts.createIf(
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parent, ts.createBlock(
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[ts.createExpressionStatement(ts.createCall(
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ts.createPropertyAccess(renderer, 'appendChild'), [], [parent, node]))],
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true));
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return ts.createFunctionDeclaration(
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[], [], undefined, functionName, [],
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[renderer, parent, ...extraParameters].map(name => getAnyTypedParameter(name)), undefined,
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ts.createBlock(
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[
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...precedingVariables, nodeVariableStatement, guardedAppendChildCall,
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ts.createReturn(node)
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],
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true));
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}
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/** Creates a helper for `projectNodes`. */
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function getProjectNodesHelper(): ts.FunctionDeclaration {
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const renderer = ts.createIdentifier('renderer');
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const parent = ts.createIdentifier('parent');
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const nodes = ts.createIdentifier('nodes');
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const incrementor = ts.createIdentifier('i');
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// for (let i = 0; i < nodes.length; i++) {
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// renderer.appendChild(parent, nodes[i]);
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// }
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const loopInitializer = ts.createVariableDeclarationList(
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[ts.createVariableDeclaration(incrementor, undefined, ts.createNumericLiteral('0'))],
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ts.NodeFlags.Let);
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const loopCondition = ts.createBinary(
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incrementor, ts.SyntaxKind.LessThanToken,
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ts.createPropertyAccess(nodes, ts.createIdentifier('length')));
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const appendStatement = ts.createExpressionStatement(ts.createCall(
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ts.createPropertyAccess(renderer, 'appendChild'), [],
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[parent, ts.createElementAccess(nodes, incrementor)]));
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const loop = ts.createFor(
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loopInitializer, loopCondition, ts.createPostfix(incrementor, ts.SyntaxKind.PlusPlusToken),
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ts.createBlock([appendStatement]));
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return ts.createFunctionDeclaration(
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[], [], undefined, HelperFunction.projectNodes, [],
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[renderer, parent, nodes].map(name => getAnyTypedParameter(name)), undefined,
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ts.createBlock([loop], true));
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}
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/** Creates a helper for `animate`. */
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function getAnimateHelper(): ts.FunctionDeclaration {
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// throw new Error('...');
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const throwStatement = ts.createThrow(ts.createNew(
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ts.createIdentifier('Error'), [],
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[ts.createStringLiteral('Renderer.animate is no longer supported!')]));
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return ts.createFunctionDeclaration(
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[], [], undefined, HelperFunction.animate, [], [], undefined,
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ts.createBlock([throwStatement], true));
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}
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/** Creates a helper for `destroyView`. */
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function getDestroyViewHelper(): ts.FunctionDeclaration {
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const renderer = ts.createIdentifier('renderer');
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const allNodes = ts.createIdentifier('allNodes');
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const incrementor = ts.createIdentifier('i');
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// for (let i = 0; i < allNodes.length; i++) {
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// renderer.destroyNode(allNodes[i]);
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// }
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const loopInitializer = ts.createVariableDeclarationList(
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[ts.createVariableDeclaration(incrementor, undefined, ts.createNumericLiteral('0'))],
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ts.NodeFlags.Let);
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const loopCondition = ts.createBinary(
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incrementor, ts.SyntaxKind.LessThanToken,
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ts.createPropertyAccess(allNodes, ts.createIdentifier('length')));
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const destroyStatement = ts.createExpressionStatement(ts.createCall(
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ts.createPropertyAccess(renderer, 'destroyNode'), [],
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[ts.createElementAccess(allNodes, incrementor)]));
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const loop = ts.createFor(
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loopInitializer, loopCondition, ts.createPostfix(incrementor, ts.SyntaxKind.PlusPlusToken),
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ts.createBlock([destroyStatement]));
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return ts.createFunctionDeclaration(
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[], [], undefined, HelperFunction.destroyView, [],
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[renderer, allNodes].map(name => getAnyTypedParameter(name)), undefined,
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ts.createBlock([loop], true));
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}
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/** Creates a helper for `detachView`. */
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function getDetachViewHelper(): ts.FunctionDeclaration {
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const renderer = ts.createIdentifier('renderer');
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const rootNodes = ts.createIdentifier('rootNodes');
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const incrementor = ts.createIdentifier('i');
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const node = ts.createIdentifier('node');
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// for (let i = 0; i < rootNodes.length; i++) {
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// const node = rootNodes[i];
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// renderer.removeChild(renderer.parentNode(node), node);
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// }
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const loopInitializer = ts.createVariableDeclarationList(
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[ts.createVariableDeclaration(incrementor, undefined, ts.createNumericLiteral('0'))],
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ts.NodeFlags.Let);
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const loopCondition = ts.createBinary(
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incrementor, ts.SyntaxKind.LessThanToken,
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ts.createPropertyAccess(rootNodes, ts.createIdentifier('length')));
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// const node = rootNodes[i];
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const nodeVariableStatement = ts.createVariableStatement(
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undefined, ts.createVariableDeclarationList(
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[ts.createVariableDeclaration(
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node, undefined, ts.createElementAccess(rootNodes, incrementor))],
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ts.NodeFlags.Const));
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// renderer.removeChild(renderer.parentNode(node), node);
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const removeCall = ts.createCall(
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ts.createPropertyAccess(renderer, 'removeChild'), [],
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[ts.createCall(ts.createPropertyAccess(renderer, 'parentNode'), [], [node]), node]);
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const loop = ts.createFor(
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loopInitializer, loopCondition, ts.createPostfix(incrementor, ts.SyntaxKind.PlusPlusToken),
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ts.createBlock([nodeVariableStatement, ts.createExpressionStatement(removeCall)]));
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return ts.createFunctionDeclaration(
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[], [], undefined, HelperFunction.detachView, [],
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[renderer, rootNodes].map(name => getAnyTypedParameter(name)), undefined,
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ts.createBlock([loop], true));
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}
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/** Creates a helper for `attachViewAfter` */
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function getAttachViewAfterHelper(): ts.FunctionDeclaration {
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const renderer = ts.createIdentifier('renderer');
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const node = ts.createIdentifier('node');
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const rootNodes = ts.createIdentifier('rootNodes');
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const parent = ts.createIdentifier('parent');
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const nextSibling = ts.createIdentifier('nextSibling');
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const incrementor = ts.createIdentifier('i');
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const createConstWithMethodCallInitializer = (constName: ts.Identifier, methodToCall: string) => {
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return ts.createVariableStatement(
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undefined,
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ts.createVariableDeclarationList(
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[ts.createVariableDeclaration(
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constName, undefined,
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ts.createCall(ts.createPropertyAccess(renderer, methodToCall), [], [node]))],
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ts.NodeFlags.Const));
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};
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// const parent = renderer.parentNode(node);
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const parentVariableStatement = createConstWithMethodCallInitializer(parent, 'parentNode');
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// const nextSibling = renderer.nextSibling(node);
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const nextSiblingVariableStatement =
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createConstWithMethodCallInitializer(nextSibling, 'nextSibling');
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// for (let i = 0; i < rootNodes.length; i++) {
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// renderer.insertBefore(parentElement, rootNodes[i], nextSibling);
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// }
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const loopInitializer = ts.createVariableDeclarationList(
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[ts.createVariableDeclaration(incrementor, undefined, ts.createNumericLiteral('0'))],
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ts.NodeFlags.Let);
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const loopCondition = ts.createBinary(
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incrementor, ts.SyntaxKind.LessThanToken,
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ts.createPropertyAccess(rootNodes, ts.createIdentifier('length')));
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const insertBeforeCall = ts.createCall(
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ts.createPropertyAccess(renderer, 'insertBefore'), [],
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[parent, ts.createElementAccess(rootNodes, incrementor), nextSibling]);
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const loop = ts.createFor(
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loopInitializer, loopCondition, ts.createPostfix(incrementor, ts.SyntaxKind.PlusPlusToken),
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ts.createBlock([ts.createExpressionStatement(insertBeforeCall)]));
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return ts.createFunctionDeclaration(
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[], [], undefined, HelperFunction.attachViewAfter, [],
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[renderer, node, rootNodes].map(name => getAnyTypedParameter(name)), undefined,
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ts.createBlock([parentVariableStatement, nextSiblingVariableStatement, loop], true));
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}
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/** Creates a helper for `setElementAttribute` */
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function getSetElementAttributeHelper(): ts.FunctionDeclaration {
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const renderer = ts.createIdentifier('renderer');
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const element = ts.createIdentifier('element');
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const namespaceAndName = ts.createIdentifier('namespaceAndName');
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const value = ts.createIdentifier('value');
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const name = ts.createIdentifier('name');
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const namespace = ts.createIdentifier('namespace');
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// [namespace, name] = splitNamespace(namespaceAndName);
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const namespaceAndNameVariable = ts.createVariableDeclaration(
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ts.createArrayBindingPattern(
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[namespace, name].map(id => ts.createBindingElement(undefined, undefined, id))),
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undefined,
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ts.createCall(ts.createIdentifier(HelperFunction.splitNamespace), [], [namespaceAndName]));
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// renderer.setAttribute(element, name, value, namespace);
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const setCall = ts.createCall(
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||
|
|
ts.createPropertyAccess(renderer, 'setAttribute'), [], [element, name, value, namespace]);
|
||
|
|
|
||
|
|
// renderer.removeAttribute(element, name, namespace);
|
||
|
|
const removeCall = ts.createCall(
|
||
|
|
ts.createPropertyAccess(renderer, 'removeAttribute'), [], [element, name, namespace]);
|
||
|
|
|
||
|
|
// if (value != null) { setCall() } else { removeCall }
|
||
|
|
const ifStatement = ts.createIf(
|
||
|
|
ts.createBinary(value, ts.SyntaxKind.ExclamationEqualsToken, ts.createNull()),
|
||
|
|
ts.createBlock([ts.createExpressionStatement(setCall)], true),
|
||
|
|
ts.createBlock([ts.createExpressionStatement(removeCall)], true));
|
||
|
|
|
||
|
|
const functionBody = ts.createBlock(
|
||
|
|
[
|
||
|
|
ts.createVariableStatement(
|
||
|
|
undefined,
|
||
|
|
ts.createVariableDeclarationList([namespaceAndNameVariable], ts.NodeFlags.Const)),
|
||
|
|
ifStatement
|
||
|
|
],
|
||
|
|
true);
|
||
|
|
|
||
|
|
return ts.createFunctionDeclaration(
|
||
|
|
[], [], undefined, HelperFunction.setElementAttribute, [],
|
||
|
|
[
|
||
|
|
getAnyTypedParameter(renderer), getAnyTypedParameter(element),
|
||
|
|
getAnyTypedParameter(namespaceAndName), getAnyTypedParameter(value, false)
|
||
|
|
],
|
||
|
|
undefined, functionBody);
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Creates a helper for splitting a name that might contain a namespace. */
|
||
|
|
function getSplitNamespaceHelper(): ts.FunctionDeclaration {
|
||
|
|
const name = ts.createIdentifier('name');
|
||
|
|
const match = ts.createIdentifier('match');
|
||
|
|
const regex = ts.createRegularExpressionLiteral('/^:([^:]+):(.+)$/');
|
||
|
|
const matchCall = ts.createCall(ts.createPropertyAccess(name, 'match'), [], [regex]);
|
||
|
|
|
||
|
|
// const match = name.split(regex);
|
||
|
|
const matchVariable = ts.createVariableDeclarationList(
|
||
|
|
[ts.createVariableDeclaration(match, undefined, matchCall)], ts.NodeFlags.Const);
|
||
|
|
|
||
|
|
// return [match[1], match[2]];
|
||
|
|
const matchReturn = ts.createReturn(
|
||
|
|
ts.createArrayLiteral([ts.createElementAccess(match, 1), ts.createElementAccess(match, 2)]));
|
||
|
|
|
||
|
|
// if (name[0] === ':') { const match = ...; return ...; }
|
||
|
|
const ifStatement = ts.createIf(
|
||
|
|
ts.createBinary(
|
||
|
|
ts.createElementAccess(name, 0), ts.SyntaxKind.EqualsEqualsEqualsToken,
|
||
|
|
ts.createStringLiteral(':')),
|
||
|
|
ts.createBlock([ts.createVariableStatement([], matchVariable), matchReturn], true));
|
||
|
|
|
||
|
|
// return ['', name];
|
||
|
|
const elseReturn = ts.createReturn(ts.createArrayLiteral([ts.createStringLiteral(''), name]));
|
||
|
|
|
||
|
|
return ts.createFunctionDeclaration(
|
||
|
|
[], [], undefined, HelperFunction.splitNamespace, [], [getAnyTypedParameter(name)], undefined,
|
||
|
|
ts.createBlock([ifStatement, elseReturn], true));
|
||
|
|
}
|