@angular/compiler
Version:
Angular - the compiler library
217 lines • 30.7 kB
JavaScript
/**
* @license
* Copyright Google LLC 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
*/
(function (factory) {
if (typeof module === "object" && typeof module.exports === "object") {
var v = factory(require, exports);
if (v !== undefined) module.exports = v;
}
else if (typeof define === "function" && define.amd) {
define("@angular/compiler/src/output/abstract_js_emitter", ["require", "exports", "tslib", "@angular/compiler/src/output/abstract_emitter", "@angular/compiler/src/output/output_ast"], factory);
}
})(function (require, exports) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.AbstractJsEmitterVisitor = void 0;
var tslib_1 = require("tslib");
var abstract_emitter_1 = require("@angular/compiler/src/output/abstract_emitter");
var o = require("@angular/compiler/src/output/output_ast");
var AbstractJsEmitterVisitor = /** @class */ (function (_super) {
tslib_1.__extends(AbstractJsEmitterVisitor, _super);
function AbstractJsEmitterVisitor() {
return _super.call(this, false) || this;
}
AbstractJsEmitterVisitor.prototype.visitDeclareClassStmt = function (stmt, ctx) {
var _this = this;
ctx.pushClass(stmt);
this._visitClassConstructor(stmt, ctx);
if (stmt.parent != null) {
ctx.print(stmt, stmt.name + ".prototype = Object.create(");
stmt.parent.visitExpression(this, ctx);
ctx.println(stmt, ".prototype);");
}
stmt.getters.forEach(function (getter) { return _this._visitClassGetter(stmt, getter, ctx); });
stmt.methods.forEach(function (method) { return _this._visitClassMethod(stmt, method, ctx); });
ctx.popClass();
return null;
};
AbstractJsEmitterVisitor.prototype._visitClassConstructor = function (stmt, ctx) {
ctx.print(stmt, "function " + stmt.name + "(");
if (stmt.constructorMethod != null) {
this._visitParams(stmt.constructorMethod.params, ctx);
}
ctx.println(stmt, ") {");
ctx.incIndent();
if (stmt.constructorMethod != null) {
if (stmt.constructorMethod.body.length > 0) {
ctx.println(stmt, "var self = this;");
this.visitAllStatements(stmt.constructorMethod.body, ctx);
}
}
ctx.decIndent();
ctx.println(stmt, "}");
};
AbstractJsEmitterVisitor.prototype._visitClassGetter = function (stmt, getter, ctx) {
ctx.println(stmt, "Object.defineProperty(" + stmt.name + ".prototype, '" + getter.name + "', { get: function() {");
ctx.incIndent();
if (getter.body.length > 0) {
ctx.println(stmt, "var self = this;");
this.visitAllStatements(getter.body, ctx);
}
ctx.decIndent();
ctx.println(stmt, "}});");
};
AbstractJsEmitterVisitor.prototype._visitClassMethod = function (stmt, method, ctx) {
ctx.print(stmt, stmt.name + ".prototype." + method.name + " = function(");
this._visitParams(method.params, ctx);
ctx.println(stmt, ") {");
ctx.incIndent();
if (method.body.length > 0) {
ctx.println(stmt, "var self = this;");
this.visitAllStatements(method.body, ctx);
}
ctx.decIndent();
ctx.println(stmt, "};");
};
AbstractJsEmitterVisitor.prototype.visitWrappedNodeExpr = function (ast, ctx) {
throw new Error('Cannot emit a WrappedNodeExpr in Javascript.');
};
AbstractJsEmitterVisitor.prototype.visitReadVarExpr = function (ast, ctx) {
if (ast.builtin === o.BuiltinVar.This) {
ctx.print(ast, 'self');
}
else if (ast.builtin === o.BuiltinVar.Super) {
throw new Error("'super' needs to be handled at a parent ast node, not at the variable level!");
}
else {
_super.prototype.visitReadVarExpr.call(this, ast, ctx);
}
return null;
};
AbstractJsEmitterVisitor.prototype.visitDeclareVarStmt = function (stmt, ctx) {
ctx.print(stmt, "var " + stmt.name);
if (stmt.value) {
ctx.print(stmt, ' = ');
stmt.value.visitExpression(this, ctx);
}
ctx.println(stmt, ";");
return null;
};
AbstractJsEmitterVisitor.prototype.visitCastExpr = function (ast, ctx) {
ast.value.visitExpression(this, ctx);
return null;
};
AbstractJsEmitterVisitor.prototype.visitInvokeFunctionExpr = function (expr, ctx) {
var fnExpr = expr.fn;
if (fnExpr instanceof o.ReadVarExpr && fnExpr.builtin === o.BuiltinVar.Super) {
ctx.currentClass.parent.visitExpression(this, ctx);
ctx.print(expr, ".call(this");
if (expr.args.length > 0) {
ctx.print(expr, ", ");
this.visitAllExpressions(expr.args, ctx, ',');
}
ctx.print(expr, ")");
}
else {
_super.prototype.visitInvokeFunctionExpr.call(this, expr, ctx);
}
return null;
};
AbstractJsEmitterVisitor.prototype.visitFunctionExpr = function (ast, ctx) {
ctx.print(ast, "function" + (ast.name ? ' ' + ast.name : '') + "(");
this._visitParams(ast.params, ctx);
ctx.println(ast, ") {");
ctx.incIndent();
this.visitAllStatements(ast.statements, ctx);
ctx.decIndent();
ctx.print(ast, "}");
return null;
};
AbstractJsEmitterVisitor.prototype.visitDeclareFunctionStmt = function (stmt, ctx) {
ctx.print(stmt, "function " + stmt.name + "(");
this._visitParams(stmt.params, ctx);
ctx.println(stmt, ") {");
ctx.incIndent();
this.visitAllStatements(stmt.statements, ctx);
ctx.decIndent();
ctx.println(stmt, "}");
return null;
};
AbstractJsEmitterVisitor.prototype.visitTryCatchStmt = function (stmt, ctx) {
ctx.println(stmt, "try {");
ctx.incIndent();
this.visitAllStatements(stmt.bodyStmts, ctx);
ctx.decIndent();
ctx.println(stmt, "} catch (" + abstract_emitter_1.CATCH_ERROR_VAR.name + ") {");
ctx.incIndent();
var catchStmts = [abstract_emitter_1.CATCH_STACK_VAR.set(abstract_emitter_1.CATCH_ERROR_VAR.prop('stack')).toDeclStmt(null, [
o.StmtModifier.Final
])].concat(stmt.catchStmts);
this.visitAllStatements(catchStmts, ctx);
ctx.decIndent();
ctx.println(stmt, "}");
return null;
};
AbstractJsEmitterVisitor.prototype.visitLocalizedString = function (ast, ctx) {
var _this = this;
// The following convoluted piece of code is effectively the downlevelled equivalent of
// ```
// $localize `...`
// ```
// which is effectively like:
// ```
// $localize(__makeTemplateObject(cooked, raw), expression1, expression2, ...);
// ```
//
// The `$localize` function expects a "template object", which is an array of "cooked" strings
// plus a `raw` property that contains an array of "raw" strings.
//
// In some environments a helper function called `__makeTemplateObject(cooked, raw)` might be
// available, in which case we use that. Otherwise we must create our own helper function
// inline.
//
// In the inline function, if `Object.defineProperty` is available we use that to attach the
// `raw` array.
ctx.print(ast, '$localize((this&&this.__makeTemplateObject||function(e,t){return Object.defineProperty?Object.defineProperty(e,"raw",{value:t}):e.raw=t,e})(');
var parts = [ast.serializeI18nHead()];
for (var i = 1; i < ast.messageParts.length; i++) {
parts.push(ast.serializeI18nTemplatePart(i));
}
ctx.print(ast, "[" + parts.map(function (part) { return abstract_emitter_1.escapeIdentifier(part.cooked, false); }).join(', ') + "], ");
ctx.print(ast, "[" + parts.map(function (part) { return abstract_emitter_1.escapeIdentifier(part.raw, false); }).join(', ') + "])");
ast.expressions.forEach(function (expression) {
ctx.print(ast, ', ');
expression.visitExpression(_this, ctx);
});
ctx.print(ast, ')');
return null;
};
AbstractJsEmitterVisitor.prototype._visitParams = function (params, ctx) {
this.visitAllObjects(function (param) { return ctx.print(null, param.name); }, params, ctx, ',');
};
AbstractJsEmitterVisitor.prototype.getBuiltinMethodName = function (method) {
var name;
switch (method) {
case o.BuiltinMethod.ConcatArray:
name = 'concat';
break;
case o.BuiltinMethod.SubscribeObservable:
name = 'subscribe';
break;
case o.BuiltinMethod.Bind:
name = 'bind';
break;
default:
throw new Error("Unknown builtin method: " + method);
}
return name;
};
return AbstractJsEmitterVisitor;
}(abstract_emitter_1.AbstractEmitterVisitor));
exports.AbstractJsEmitterVisitor = AbstractJsEmitterVisitor;
});
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n\nimport {AbstractEmitterVisitor, CATCH_ERROR_VAR, CATCH_STACK_VAR, EmitterVisitorContext, escapeIdentifier} from './abstract_emitter';\nimport * as o from './output_ast';\n\nexport abstract class AbstractJsEmitterVisitor extends AbstractEmitterVisitor {\n  constructor() {\n    super(false);\n  }\n  visitDeclareClassStmt(stmt: o.ClassStmt, ctx: EmitterVisitorContext): any {\n    ctx.pushClass(stmt);\n    this._visitClassConstructor(stmt, ctx);\n\n    if (stmt.parent != null) {\n      ctx.print(stmt, `${stmt.name}.prototype = Object.create(`);\n      stmt.parent.visitExpression(this, ctx);\n      ctx.println(stmt, `.prototype);`);\n    }\n    stmt.getters.forEach((getter) => this._visitClassGetter(stmt, getter, ctx));\n    stmt.methods.forEach((method) => this._visitClassMethod(stmt, method, ctx));\n    ctx.popClass();\n    return null;\n  }\n\n  private _visitClassConstructor(stmt: o.ClassStmt, ctx: EmitterVisitorContext) {\n    ctx.print(stmt, `function ${stmt.name}(`);\n    if (stmt.constructorMethod != null) {\n      this._visitParams(stmt.constructorMethod.params, ctx);\n    }\n    ctx.println(stmt, `) {`);\n    ctx.incIndent();\n    if (stmt.constructorMethod != null) {\n      if (stmt.constructorMethod.body.length > 0) {\n        ctx.println(stmt, `var self = this;`);\n        this.visitAllStatements(stmt.constructorMethod.body, ctx);\n      }\n    }\n    ctx.decIndent();\n    ctx.println(stmt, `}`);\n  }\n\n  private _visitClassGetter(stmt: o.ClassStmt, getter: o.ClassGetter, ctx: EmitterVisitorContext) {\n    ctx.println(\n        stmt,\n        `Object.defineProperty(${stmt.name}.prototype, '${getter.name}', { get: function() {`);\n    ctx.incIndent();\n    if (getter.body.length > 0) {\n      ctx.println(stmt, `var self = this;`);\n      this.visitAllStatements(getter.body, ctx);\n    }\n    ctx.decIndent();\n    ctx.println(stmt, `}});`);\n  }\n\n  private _visitClassMethod(stmt: o.ClassStmt, method: o.ClassMethod, ctx: EmitterVisitorContext) {\n    ctx.print(stmt, `${stmt.name}.prototype.${method.name} = function(`);\n    this._visitParams(method.params, ctx);\n    ctx.println(stmt, `) {`);\n    ctx.incIndent();\n    if (method.body.length > 0) {\n      ctx.println(stmt, `var self = this;`);\n      this.visitAllStatements(method.body, ctx);\n    }\n    ctx.decIndent();\n    ctx.println(stmt, `};`);\n  }\n\n  visitWrappedNodeExpr(ast: o.WrappedNodeExpr<any>, ctx: EmitterVisitorContext): any {\n    throw new Error('Cannot emit a WrappedNodeExpr in Javascript.');\n  }\n\n  visitReadVarExpr(ast: o.ReadVarExpr, ctx: EmitterVisitorContext): string|null {\n    if (ast.builtin === o.BuiltinVar.This) {\n      ctx.print(ast, 'self');\n    } else if (ast.builtin === o.BuiltinVar.Super) {\n      throw new Error(\n          `'super' needs to be handled at a parent ast node, not at the variable level!`);\n    } else {\n      super.visitReadVarExpr(ast, ctx);\n    }\n    return null;\n  }\n  visitDeclareVarStmt(stmt: o.DeclareVarStmt, ctx: EmitterVisitorContext): any {\n    ctx.print(stmt, `var ${stmt.name}`);\n    if (stmt.value) {\n      ctx.print(stmt, ' = ');\n      stmt.value.visitExpression(this, ctx);\n    }\n    ctx.println(stmt, `;`);\n    return null;\n  }\n  visitCastExpr(ast: o.CastExpr, ctx: EmitterVisitorContext): any {\n    ast.value.visitExpression(this, ctx);\n    return null;\n  }\n  visitInvokeFunctionExpr(expr: o.InvokeFunctionExpr, ctx: EmitterVisitorContext): string|null {\n    const fnExpr = expr.fn;\n    if (fnExpr instanceof o.ReadVarExpr && fnExpr.builtin === o.BuiltinVar.Super) {\n      ctx.currentClass!.parent!.visitExpression(this, ctx);\n      ctx.print(expr, `.call(this`);\n      if (expr.args.length > 0) {\n        ctx.print(expr, `, `);\n        this.visitAllExpressions(expr.args, ctx, ',');\n      }\n      ctx.print(expr, `)`);\n    } else {\n      super.visitInvokeFunctionExpr(expr, ctx);\n    }\n    return null;\n  }\n  visitFunctionExpr(ast: o.FunctionExpr, ctx: EmitterVisitorContext): any {\n    ctx.print(ast, `function${ast.name ? ' ' + ast.name : ''}(`);\n    this._visitParams(ast.params, ctx);\n    ctx.println(ast, `) {`);\n    ctx.incIndent();\n    this.visitAllStatements(ast.statements, ctx);\n    ctx.decIndent();\n    ctx.print(ast, `}`);\n    return null;\n  }\n  visitDeclareFunctionStmt(stmt: o.DeclareFunctionStmt, ctx: EmitterVisitorContext): any {\n    ctx.print(stmt, `function ${stmt.name}(`);\n    this._visitParams(stmt.params, ctx);\n    ctx.println(stmt, `) {`);\n    ctx.incIndent();\n    this.visitAllStatements(stmt.statements, ctx);\n    ctx.decIndent();\n    ctx.println(stmt, `}`);\n    return null;\n  }\n  visitTryCatchStmt(stmt: o.TryCatchStmt, ctx: EmitterVisitorContext): any {\n    ctx.println(stmt, `try {`);\n    ctx.incIndent();\n    this.visitAllStatements(stmt.bodyStmts, ctx);\n    ctx.decIndent();\n    ctx.println(stmt, `} catch (${CATCH_ERROR_VAR.name}) {`);\n    ctx.incIndent();\n    const catchStmts =\n        [<o.Statement>CATCH_STACK_VAR.set(CATCH_ERROR_VAR.prop('stack')).toDeclStmt(null, [\n          o.StmtModifier.Final\n        ])].concat(stmt.catchStmts);\n    this.visitAllStatements(catchStmts, ctx);\n    ctx.decIndent();\n    ctx.println(stmt, `}`);\n    return null;\n  }\n\n  visitLocalizedString(ast: o.LocalizedString, ctx: EmitterVisitorContext): any {\n    // The following convoluted piece of code is effectively the downlevelled equivalent of\n    // ```\n    // $localize `...`\n    // ```\n    // which is effectively like:\n    // ```\n    // $localize(__makeTemplateObject(cooked, raw), expression1, expression2, ...);\n    // ```\n    //\n    // The `$localize` function expects a \"template object\", which is an array of \"cooked\" strings\n    // plus a `raw` property that contains an array of \"raw\" strings.\n    //\n    // In some environments a helper function called `__makeTemplateObject(cooked, raw)` might be\n    // available, in which case we use that. Otherwise we must create our own helper function\n    // inline.\n    //\n    // In the inline function, if `Object.defineProperty` is available we use that to attach the\n    // `raw` array.\n    ctx.print(\n        ast,\n        '$localize((this&&this.__makeTemplateObject||function(e,t){return Object.defineProperty?Object.defineProperty(e,\"raw\",{value:t}):e.raw=t,e})(');\n    const parts = [ast.serializeI18nHead()];\n    for (let i = 1; i < ast.messageParts.length; i++) {\n      parts.push(ast.serializeI18nTemplatePart(i));\n    }\n    ctx.print(ast, `[${parts.map(part => escapeIdentifier(part.cooked, false)).join(', ')}], `);\n    ctx.print(ast, `[${parts.map(part => escapeIdentifier(part.raw, false)).join(', ')}])`);\n    ast.expressions.forEach(expression => {\n      ctx.print(ast, ', ');\n      expression.visitExpression(this, ctx);\n    });\n    ctx.print(ast, ')');\n    return null;\n  }\n\n  private _visitParams(params: o.FnParam[], ctx: EmitterVisitorContext): void {\n    this.visitAllObjects(param => ctx.print(null, param.name), params, ctx, ',');\n  }\n\n  getBuiltinMethodName(method: o.BuiltinMethod): string {\n    let name: string;\n    switch (method) {\n      case o.BuiltinMethod.ConcatArray:\n        name = 'concat';\n        break;\n      case o.BuiltinMethod.SubscribeObservable:\n        name = 'subscribe';\n        break;\n      case o.BuiltinMethod.Bind:\n        name = 'bind';\n        break;\n      default:\n        throw new Error(`Unknown builtin method: ${method}`);\n    }\n    return name;\n  }\n}\n"]}