angular2
Version:
Angular 2 - a web framework for modern web apps
238 lines • 37.5 kB
JavaScript
'use strict';"use strict";
var o = require('../output/output_ast');
var identifiers_1 = require('../identifiers');
var exceptions_1 = require('angular2/src/facade/exceptions');
var lang_1 = require('angular2/src/facade/lang');
var IMPLICIT_RECEIVER = o.variable('#implicit');
var ExpressionWithWrappedValueInfo = (function () {
function ExpressionWithWrappedValueInfo(expression, needsValueUnwrapper) {
this.expression = expression;
this.needsValueUnwrapper = needsValueUnwrapper;
}
return ExpressionWithWrappedValueInfo;
}());
exports.ExpressionWithWrappedValueInfo = ExpressionWithWrappedValueInfo;
function convertCdExpressionToIr(nameResolver, implicitReceiver, expression, valueUnwrapper) {
var visitor = new _AstToIrVisitor(nameResolver, implicitReceiver, valueUnwrapper);
var irAst = expression.visit(visitor, _Mode.Expression);
return new ExpressionWithWrappedValueInfo(irAst, visitor.needsValueUnwrapper);
}
exports.convertCdExpressionToIr = convertCdExpressionToIr;
function convertCdStatementToIr(nameResolver, implicitReceiver, stmt) {
var visitor = new _AstToIrVisitor(nameResolver, implicitReceiver, null);
var statements = [];
flattenStatements(stmt.visit(visitor, _Mode.Statement), statements);
return statements;
}
exports.convertCdStatementToIr = convertCdStatementToIr;
var _Mode;
(function (_Mode) {
_Mode[_Mode["Statement"] = 0] = "Statement";
_Mode[_Mode["Expression"] = 1] = "Expression";
})(_Mode || (_Mode = {}));
function ensureStatementMode(mode, ast) {
if (mode !== _Mode.Statement) {
throw new exceptions_1.BaseException("Expected a statement, but saw " + ast);
}
}
function ensureExpressionMode(mode, ast) {
if (mode !== _Mode.Expression) {
throw new exceptions_1.BaseException("Expected an expression, but saw " + ast);
}
}
function convertToStatementIfNeeded(mode, expr) {
if (mode === _Mode.Statement) {
return expr.toStmt();
}
else {
return expr;
}
}
var _AstToIrVisitor = (function () {
function _AstToIrVisitor(_nameResolver, _implicitReceiver, _valueUnwrapper) {
this._nameResolver = _nameResolver;
this._implicitReceiver = _implicitReceiver;
this._valueUnwrapper = _valueUnwrapper;
this.needsValueUnwrapper = false;
}
_AstToIrVisitor.prototype.visitBinary = function (ast, mode) {
var op;
switch (ast.operation) {
case '+':
op = o.BinaryOperator.Plus;
break;
case '-':
op = o.BinaryOperator.Minus;
break;
case '*':
op = o.BinaryOperator.Multiply;
break;
case '/':
op = o.BinaryOperator.Divide;
break;
case '%':
op = o.BinaryOperator.Modulo;
break;
case '&&':
op = o.BinaryOperator.And;
break;
case '||':
op = o.BinaryOperator.Or;
break;
case '==':
op = o.BinaryOperator.Equals;
break;
case '!=':
op = o.BinaryOperator.NotEquals;
break;
case '===':
op = o.BinaryOperator.Identical;
break;
case '!==':
op = o.BinaryOperator.NotIdentical;
break;
case '<':
op = o.BinaryOperator.Lower;
break;
case '>':
op = o.BinaryOperator.Bigger;
break;
case '<=':
op = o.BinaryOperator.LowerEquals;
break;
case '>=':
op = o.BinaryOperator.BiggerEquals;
break;
default:
throw new exceptions_1.BaseException("Unsupported operation " + ast.operation);
}
return convertToStatementIfNeeded(mode, new o.BinaryOperatorExpr(op, ast.left.visit(this, _Mode.Expression), ast.right.visit(this, _Mode.Expression)));
};
_AstToIrVisitor.prototype.visitChain = function (ast, mode) {
ensureStatementMode(mode, ast);
return this.visitAll(ast.expressions, mode);
};
_AstToIrVisitor.prototype.visitConditional = function (ast, mode) {
var value = ast.condition.visit(this, _Mode.Expression);
return convertToStatementIfNeeded(mode, value.conditional(ast.trueExp.visit(this, _Mode.Expression), ast.falseExp.visit(this, _Mode.Expression)));
};
_AstToIrVisitor.prototype.visitPipe = function (ast, mode) {
var input = ast.exp.visit(this, _Mode.Expression);
var args = this.visitAll(ast.args, _Mode.Expression);
var value = this._nameResolver.callPipe(ast.name, input, args);
this.needsValueUnwrapper = true;
return convertToStatementIfNeeded(mode, this._valueUnwrapper.callMethod('unwrap', [value]));
};
_AstToIrVisitor.prototype.visitFunctionCall = function (ast, mode) {
return convertToStatementIfNeeded(mode, ast.target.visit(this, _Mode.Expression)
.callFn(this.visitAll(ast.args, _Mode.Expression)));
};
_AstToIrVisitor.prototype.visitImplicitReceiver = function (ast, mode) {
ensureExpressionMode(mode, ast);
return IMPLICIT_RECEIVER;
};
_AstToIrVisitor.prototype.visitInterpolation = function (ast, mode) {
ensureExpressionMode(mode, ast);
var args = [o.literal(ast.expressions.length)];
for (var i = 0; i < ast.strings.length - 1; i++) {
args.push(o.literal(ast.strings[i]));
args.push(ast.expressions[i].visit(this, _Mode.Expression));
}
args.push(o.literal(ast.strings[ast.strings.length - 1]));
return o.importExpr(identifiers_1.Identifiers.interpolate).callFn(args);
};
_AstToIrVisitor.prototype.visitKeyedRead = function (ast, mode) {
return convertToStatementIfNeeded(mode, ast.obj.visit(this, _Mode.Expression).key(ast.key.visit(this, _Mode.Expression)));
};
_AstToIrVisitor.prototype.visitKeyedWrite = function (ast, mode) {
var obj = ast.obj.visit(this, _Mode.Expression);
var key = ast.key.visit(this, _Mode.Expression);
var value = ast.value.visit(this, _Mode.Expression);
return convertToStatementIfNeeded(mode, obj.key(key).set(value));
};
_AstToIrVisitor.prototype.visitLiteralArray = function (ast, mode) {
return convertToStatementIfNeeded(mode, this._nameResolver.createLiteralArray(this.visitAll(ast.expressions, mode)));
};
_AstToIrVisitor.prototype.visitLiteralMap = function (ast, mode) {
var parts = [];
for (var i = 0; i < ast.keys.length; i++) {
parts.push([ast.keys[i], ast.values[i].visit(this, _Mode.Expression)]);
}
return convertToStatementIfNeeded(mode, this._nameResolver.createLiteralMap(parts));
};
_AstToIrVisitor.prototype.visitLiteralPrimitive = function (ast, mode) {
return convertToStatementIfNeeded(mode, o.literal(ast.value));
};
_AstToIrVisitor.prototype.visitMethodCall = function (ast, mode) {
var args = this.visitAll(ast.args, _Mode.Expression);
var result = null;
var receiver = ast.receiver.visit(this, _Mode.Expression);
if (receiver === IMPLICIT_RECEIVER) {
var varExpr = this._nameResolver.getLocal(ast.name);
if (lang_1.isPresent(varExpr)) {
result = varExpr.callFn(args);
}
else {
receiver = this._implicitReceiver;
}
}
if (lang_1.isBlank(result)) {
result = receiver.callMethod(ast.name, args);
}
return convertToStatementIfNeeded(mode, result);
};
_AstToIrVisitor.prototype.visitPrefixNot = function (ast, mode) {
return convertToStatementIfNeeded(mode, o.not(ast.expression.visit(this, _Mode.Expression)));
};
_AstToIrVisitor.prototype.visitPropertyRead = function (ast, mode) {
var result = null;
var receiver = ast.receiver.visit(this, _Mode.Expression);
if (receiver === IMPLICIT_RECEIVER) {
result = this._nameResolver.getLocal(ast.name);
if (lang_1.isBlank(result)) {
receiver = this._implicitReceiver;
}
}
if (lang_1.isBlank(result)) {
result = receiver.prop(ast.name);
}
return convertToStatementIfNeeded(mode, result);
};
_AstToIrVisitor.prototype.visitPropertyWrite = function (ast, mode) {
var receiver = ast.receiver.visit(this, _Mode.Expression);
if (receiver === IMPLICIT_RECEIVER) {
var varExpr = this._nameResolver.getLocal(ast.name);
if (lang_1.isPresent(varExpr)) {
throw new exceptions_1.BaseException('Cannot assign to a reference or variable!');
}
receiver = this._implicitReceiver;
}
return convertToStatementIfNeeded(mode, receiver.prop(ast.name).set(ast.value.visit(this, _Mode.Expression)));
};
_AstToIrVisitor.prototype.visitSafePropertyRead = function (ast, mode) {
var receiver = ast.receiver.visit(this, _Mode.Expression);
return convertToStatementIfNeeded(mode, receiver.isBlank().conditional(o.NULL_EXPR, receiver.prop(ast.name)));
};
_AstToIrVisitor.prototype.visitSafeMethodCall = function (ast, mode) {
var receiver = ast.receiver.visit(this, _Mode.Expression);
var args = this.visitAll(ast.args, _Mode.Expression);
return convertToStatementIfNeeded(mode, receiver.isBlank().conditional(o.NULL_EXPR, receiver.callMethod(ast.name, args)));
};
_AstToIrVisitor.prototype.visitAll = function (asts, mode) {
var _this = this;
return asts.map(function (ast) { return ast.visit(_this, mode); });
};
_AstToIrVisitor.prototype.visitQuote = function (ast, mode) {
throw new exceptions_1.BaseException('Quotes are not supported for evaluation!');
};
return _AstToIrVisitor;
}());
function flattenStatements(arg, output) {
if (lang_1.isArray(arg)) {
arg.forEach(function (entry) { return flattenStatements(entry, output); });
}
else {
output.push(arg);
}
}
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* as cdAst from '../expression_parser/ast';\nimport * as o from '../output/output_ast';\nimport {Identifiers} from '../identifiers';\n\nimport {BaseException} from 'angular2/src/facade/exceptions';\nimport {isBlank, isPresent, isArray, CONST_EXPR} from 'angular2/src/facade/lang';\n\nvar IMPLICIT_RECEIVER = o.variable('#implicit');\n\nexport interface NameResolver {\n  callPipe(name: string, input: o.Expression, args: o.Expression[]): o.Expression;\n  getLocal(name: string): o.Expression;\n  createLiteralArray(values: o.Expression[]): o.Expression;\n  createLiteralMap(values: Array<Array<string | o.Expression>>): o.Expression;\n}\n\nexport class ExpressionWithWrappedValueInfo {\n  constructor(public expression: o.Expression, public needsValueUnwrapper: boolean) {}\n}\n\nexport function convertCdExpressionToIr(\n    nameResolver: NameResolver, implicitReceiver: o.Expression, expression: cdAst.AST,\n    valueUnwrapper: o.ReadVarExpr): ExpressionWithWrappedValueInfo {\n  var visitor = new _AstToIrVisitor(nameResolver, implicitReceiver, valueUnwrapper);\n  var irAst: o.Expression = expression.visit(visitor, _Mode.Expression);\n  return new ExpressionWithWrappedValueInfo(irAst, visitor.needsValueUnwrapper);\n}\n\nexport function convertCdStatementToIr(nameResolver: NameResolver, implicitReceiver: o.Expression,\n                                       stmt: cdAst.AST): o.Statement[] {\n  var visitor = new _AstToIrVisitor(nameResolver, implicitReceiver, null);\n  var statements = [];\n  flattenStatements(stmt.visit(visitor, _Mode.Statement), statements);\n  return statements;\n}\n\nenum _Mode {\n  Statement,\n  Expression\n}\n\nfunction ensureStatementMode(mode: _Mode, ast: cdAst.AST) {\n  if (mode !== _Mode.Statement) {\n    throw new BaseException(`Expected a statement, but saw ${ast}`);\n  }\n}\n\nfunction ensureExpressionMode(mode: _Mode, ast: cdAst.AST) {\n  if (mode !== _Mode.Expression) {\n    throw new BaseException(`Expected an expression, but saw ${ast}`);\n  }\n}\n\nfunction convertToStatementIfNeeded(mode: _Mode, expr: o.Expression): o.Expression | o.Statement {\n  if (mode === _Mode.Statement) {\n    return expr.toStmt();\n  } else {\n    return expr;\n  }\n}\n\nclass _AstToIrVisitor implements cdAst.AstVisitor {\n  public needsValueUnwrapper: boolean = false;\n\n  constructor(private _nameResolver: NameResolver, private _implicitReceiver: o.Expression,\n              private _valueUnwrapper: o.ReadVarExpr) {}\n\n  visitBinary(ast: cdAst.Binary, mode: _Mode): any {\n    var op;\n    switch (ast.operation) {\n      case '+':\n        op = o.BinaryOperator.Plus;\n        break;\n      case '-':\n        op = o.BinaryOperator.Minus;\n        break;\n      case '*':\n        op = o.BinaryOperator.Multiply;\n        break;\n      case '/':\n        op = o.BinaryOperator.Divide;\n        break;\n      case '%':\n        op = o.BinaryOperator.Modulo;\n        break;\n      case '&&':\n        op = o.BinaryOperator.And;\n        break;\n      case '||':\n        op = o.BinaryOperator.Or;\n        break;\n      case '==':\n        op = o.BinaryOperator.Equals;\n        break;\n      case '!=':\n        op = o.BinaryOperator.NotEquals;\n        break;\n      case '===':\n        op = o.BinaryOperator.Identical;\n        break;\n      case '!==':\n        op = o.BinaryOperator.NotIdentical;\n        break;\n      case '<':\n        op = o.BinaryOperator.Lower;\n        break;\n      case '>':\n        op = o.BinaryOperator.Bigger;\n        break;\n      case '<=':\n        op = o.BinaryOperator.LowerEquals;\n        break;\n      case '>=':\n        op = o.BinaryOperator.BiggerEquals;\n        break;\n      default:\n        throw new BaseException(`Unsupported operation ${ast.operation}`);\n    }\n\n    return convertToStatementIfNeeded(\n        mode, new o.BinaryOperatorExpr(op, ast.left.visit(this, _Mode.Expression),\n                                       ast.right.visit(this, _Mode.Expression)));\n  }\n  visitChain(ast: cdAst.Chain, mode: _Mode): any {\n    ensureStatementMode(mode, ast);\n    return this.visitAll(ast.expressions, mode);\n  }\n  visitConditional(ast: cdAst.Conditional, mode: _Mode): any {\n    var value: o.Expression = ast.condition.visit(this, _Mode.Expression);\n    return convertToStatementIfNeeded(\n        mode, value.conditional(ast.trueExp.visit(this, _Mode.Expression),\n                                ast.falseExp.visit(this, _Mode.Expression)));\n  }\n  visitPipe(ast: cdAst.BindingPipe, mode: _Mode): any {\n    var input = ast.exp.visit(this, _Mode.Expression);\n    var args = this.visitAll(ast.args, _Mode.Expression);\n    var value = this._nameResolver.callPipe(ast.name, input, args);\n    this.needsValueUnwrapper = true;\n    return convertToStatementIfNeeded(mode, this._valueUnwrapper.callMethod('unwrap', [value]));\n  }\n  visitFunctionCall(ast: cdAst.FunctionCall, mode: _Mode): any {\n    return convertToStatementIfNeeded(mode, ast.target.visit(this, _Mode.Expression)\n                                                .callFn(this.visitAll(ast.args, _Mode.Expression)));\n  }\n  visitImplicitReceiver(ast: cdAst.ImplicitReceiver, mode: _Mode): any {\n    ensureExpressionMode(mode, ast);\n    return IMPLICIT_RECEIVER;\n  }\n  visitInterpolation(ast: cdAst.Interpolation, mode: _Mode): any {\n    ensureExpressionMode(mode, ast);\n    var args = [o.literal(ast.expressions.length)];\n    for (var i = 0; i < ast.strings.length - 1; i++) {\n      args.push(o.literal(ast.strings[i]));\n      args.push(ast.expressions[i].visit(this, _Mode.Expression));\n    }\n    args.push(o.literal(ast.strings[ast.strings.length - 1]));\n    return o.importExpr(Identifiers.interpolate).callFn(args);\n  }\n  visitKeyedRead(ast: cdAst.KeyedRead, mode: _Mode): any {\n    return convertToStatementIfNeeded(\n        mode, ast.obj.visit(this, _Mode.Expression).key(ast.key.visit(this, _Mode.Expression)));\n  }\n  visitKeyedWrite(ast: cdAst.KeyedWrite, mode: _Mode): any {\n    var obj: o.Expression = ast.obj.visit(this, _Mode.Expression);\n    var key: o.Expression = ast.key.visit(this, _Mode.Expression);\n    var value: o.Expression = ast.value.visit(this, _Mode.Expression);\n    return convertToStatementIfNeeded(mode, obj.key(key).set(value));\n  }\n  visitLiteralArray(ast: cdAst.LiteralArray, mode: _Mode): any {\n    return convertToStatementIfNeeded(\n        mode, this._nameResolver.createLiteralArray(this.visitAll(ast.expressions, mode)));\n  }\n  visitLiteralMap(ast: cdAst.LiteralMap, mode: _Mode): any {\n    var parts = [];\n    for (var i = 0; i < ast.keys.length; i++) {\n      parts.push([ast.keys[i], ast.values[i].visit(this, _Mode.Expression)]);\n    }\n    return convertToStatementIfNeeded(mode, this._nameResolver.createLiteralMap(parts));\n  }\n  visitLiteralPrimitive(ast: cdAst.LiteralPrimitive, mode: _Mode): any {\n    return convertToStatementIfNeeded(mode, o.literal(ast.value));\n  }\n  visitMethodCall(ast: cdAst.MethodCall, mode: _Mode): any {\n    var args = this.visitAll(ast.args, _Mode.Expression);\n    var result = null;\n    var receiver = ast.receiver.visit(this, _Mode.Expression);\n    if (receiver === IMPLICIT_RECEIVER) {\n      var varExpr = this._nameResolver.getLocal(ast.name);\n      if (isPresent(varExpr)) {\n        result = varExpr.callFn(args);\n      } else {\n        receiver = this._implicitReceiver;\n      }\n    }\n    if (isBlank(result)) {\n      result = receiver.callMethod(ast.name, args);\n    }\n    return convertToStatementIfNeeded(mode, result);\n  }\n  visitPrefixNot(ast: cdAst.PrefixNot, mode: _Mode): any {\n    return convertToStatementIfNeeded(mode, o.not(ast.expression.visit(this, _Mode.Expression)));\n  }\n  visitPropertyRead(ast: cdAst.PropertyRead, mode: _Mode): any {\n    var result = null;\n    var receiver = ast.receiver.visit(this, _Mode.Expression);\n    if (receiver === IMPLICIT_RECEIVER) {\n      result = this._nameResolver.getLocal(ast.name);\n      if (isBlank(result)) {\n        receiver = this._implicitReceiver;\n      }\n    }\n    if (isBlank(result)) {\n      result = receiver.prop(ast.name);\n    }\n    return convertToStatementIfNeeded(mode, result);\n  }\n  visitPropertyWrite(ast: cdAst.PropertyWrite, mode: _Mode): any {\n    var receiver: o.Expression = ast.receiver.visit(this, _Mode.Expression);\n    if (receiver === IMPLICIT_RECEIVER) {\n      var varExpr = this._nameResolver.getLocal(ast.name);\n      if (isPresent(varExpr)) {\n        throw new BaseException('Cannot assign to a reference or variable!');\n      }\n      receiver = this._implicitReceiver;\n    }\n    return convertToStatementIfNeeded(\n        mode, receiver.prop(ast.name).set(ast.value.visit(this, _Mode.Expression)));\n  }\n  visitSafePropertyRead(ast: cdAst.SafePropertyRead, mode: _Mode): any {\n    var receiver = ast.receiver.visit(this, _Mode.Expression);\n    return convertToStatementIfNeeded(\n        mode, receiver.isBlank().conditional(o.NULL_EXPR, receiver.prop(ast.name)));\n  }\n  visitSafeMethodCall(ast: cdAst.SafeMethodCall, mode: _Mode): any {\n    var receiver = ast.receiver.visit(this, _Mode.Expression);\n    var args = this.visitAll(ast.args, _Mode.Expression);\n    return convertToStatementIfNeeded(\n        mode, receiver.isBlank().conditional(o.NULL_EXPR, receiver.callMethod(ast.name, args)));\n  }\n  visitAll(asts: cdAst.AST[], mode: _Mode): any { return asts.map(ast => ast.visit(this, mode)); }\n  visitQuote(ast: cdAst.Quote, mode: _Mode): any {\n    throw new BaseException('Quotes are not supported for evaluation!');\n  }\n}\n\nfunction flattenStatements(arg: any, output: o.Statement[]) {\n  if (isArray(arg)) {\n    (<any[]>arg).forEach((entry) => flattenStatements(entry, output));\n  } else {\n    output.push(arg);\n  }\n}"]}