angular2
Version:
Angular 2 - a web framework for modern web apps
190 lines • 9.79 kB
JavaScript
'use strict';var lang_1 = require('angular2/src/facade/lang');
var codegen_facade_1 = require('./codegen_facade');
var proto_record_1 = require('./proto_record');
var constants_1 = require('./constants');
var exceptions_1 = require('angular2/src/facade/exceptions');
/**
* Class responsible for providing change detection logic for change detector classes.
*/
var CodegenLogicUtil = (function () {
function CodegenLogicUtil(_names, _utilName, _changeDetectorStateName, _changeDetection) {
this._names = _names;
this._utilName = _utilName;
this._changeDetectorStateName = _changeDetectorStateName;
this._changeDetection = _changeDetection;
}
/**
* Generates a statement which updates the local variable representing `protoRec` with the current
* value of the record. Used by property bindings.
*/
CodegenLogicUtil.prototype.genPropertyBindingEvalValue = function (protoRec) {
var _this = this;
return this._genEvalValue(protoRec, function (idx) { return _this._names.getLocalName(idx); }, this._names.getLocalsAccessorName());
};
/**
* Generates a statement which updates the local variable representing `protoRec` with the current
* value of the record. Used by event bindings.
*/
CodegenLogicUtil.prototype.genEventBindingEvalValue = function (eventRecord, protoRec) {
var _this = this;
return this._genEvalValue(protoRec, function (idx) { return _this._names.getEventLocalName(eventRecord, idx); }, "locals");
};
CodegenLogicUtil.prototype._genEvalValue = function (protoRec, getLocalName, localsAccessor) {
var context = (protoRec.contextIndex == -1) ?
this._names.getDirectiveName(protoRec.directiveIndex) :
getLocalName(protoRec.contextIndex);
var argString = protoRec.args.map(function (arg) { return getLocalName(arg); }).join(", ");
var rhs;
switch (protoRec.mode) {
case proto_record_1.RecordType.Self:
rhs = context;
break;
case proto_record_1.RecordType.Const:
rhs = codegen_facade_1.codify(protoRec.funcOrValue);
break;
case proto_record_1.RecordType.PropertyRead:
rhs = this._observe(context + "." + protoRec.name, protoRec);
break;
case proto_record_1.RecordType.SafeProperty:
var read = this._observe(context + "." + protoRec.name, protoRec);
rhs =
this._utilName + ".isValueBlank(" + context + ") ? null : " + this._observe(read, protoRec);
break;
case proto_record_1.RecordType.PropertyWrite:
rhs = context + "." + protoRec.name + " = " + getLocalName(protoRec.args[0]);
break;
case proto_record_1.RecordType.Local:
rhs = this._observe(localsAccessor + ".get(" + codegen_facade_1.rawString(protoRec.name) + ")", protoRec);
break;
case proto_record_1.RecordType.InvokeMethod:
rhs = this._observe(context + "." + protoRec.name + "(" + argString + ")", protoRec);
break;
case proto_record_1.RecordType.SafeMethodInvoke:
var invoke = context + "." + protoRec.name + "(" + argString + ")";
rhs =
this._utilName + ".isValueBlank(" + context + ") ? null : " + this._observe(invoke, protoRec);
break;
case proto_record_1.RecordType.InvokeClosure:
rhs = context + "(" + argString + ")";
break;
case proto_record_1.RecordType.PrimitiveOp:
rhs = this._utilName + "." + protoRec.name + "(" + argString + ")";
break;
case proto_record_1.RecordType.CollectionLiteral:
rhs = this._utilName + "." + protoRec.name + "(" + argString + ")";
break;
case proto_record_1.RecordType.Interpolate:
rhs = this._genInterpolation(protoRec);
break;
case proto_record_1.RecordType.KeyedRead:
rhs = this._observe(context + "[" + getLocalName(protoRec.args[0]) + "]", protoRec);
break;
case proto_record_1.RecordType.KeyedWrite:
rhs = context + "[" + getLocalName(protoRec.args[0]) + "] = " + getLocalName(protoRec.args[1]);
break;
case proto_record_1.RecordType.Chain:
rhs = 'null';
break;
default:
throw new exceptions_1.BaseException("Unknown operation " + protoRec.mode);
}
return getLocalName(protoRec.selfIndex) + " = " + rhs + ";";
};
/** @internal */
CodegenLogicUtil.prototype._observe = function (exp, rec) {
// This is an experimental feature. Works only in Dart.
if (this._changeDetection === constants_1.ChangeDetectionStrategy.OnPushObserve) {
return "this.observeValue(" + exp + ", " + rec.selfIndex + ")";
}
else {
return exp;
}
};
CodegenLogicUtil.prototype.genPropertyBindingTargets = function (propertyBindingTargets, genDebugInfo) {
var _this = this;
var bs = propertyBindingTargets.map(function (b) {
if (lang_1.isBlank(b))
return "null";
var debug = genDebugInfo ? codegen_facade_1.codify(b.debug) : "null";
return _this._utilName + ".bindingTarget(" + codegen_facade_1.codify(b.mode) + ", " + b.elementIndex + ", " + codegen_facade_1.codify(b.name) + ", " + codegen_facade_1.codify(b.unit) + ", " + debug + ")";
});
return "[" + bs.join(", ") + "]";
};
CodegenLogicUtil.prototype.genDirectiveIndices = function (directiveRecords) {
var _this = this;
var bs = directiveRecords.map(function (b) {
return (_this._utilName + ".directiveIndex(" + b.directiveIndex.elementIndex + ", " + b.directiveIndex.directiveIndex + ")");
});
return "[" + bs.join(", ") + "]";
};
/** @internal */
CodegenLogicUtil.prototype._genInterpolation = function (protoRec) {
var iVals = [];
for (var i = 0; i < protoRec.args.length; ++i) {
iVals.push(codegen_facade_1.codify(protoRec.fixedArgs[i]));
iVals.push(this._utilName + ".s(" + this._names.getLocalName(protoRec.args[i]) + ")");
}
iVals.push(codegen_facade_1.codify(protoRec.fixedArgs[protoRec.args.length]));
return codegen_facade_1.combineGeneratedStrings(iVals);
};
CodegenLogicUtil.prototype.genHydrateDirectives = function (directiveRecords) {
var res = [];
for (var i = 0; i < directiveRecords.length; ++i) {
var r = directiveRecords[i];
res.push(this._names.getDirectiveName(r.directiveIndex) + " = " + this._genReadDirective(i) + ";");
}
return res.join("\n");
};
CodegenLogicUtil.prototype._genReadDirective = function (index) {
// This is an experimental feature. Works only in Dart.
if (this._changeDetection === constants_1.ChangeDetectionStrategy.OnPushObserve) {
return "this.observeDirective(this.getDirectiveFor(directives, " + index + "), " + index + ")";
}
else {
return "this.getDirectiveFor(directives, " + index + ")";
}
};
CodegenLogicUtil.prototype.genHydrateDetectors = function (directiveRecords) {
var res = [];
for (var i = 0; i < directiveRecords.length; ++i) {
var r = directiveRecords[i];
if (!r.isDefaultChangeDetection()) {
res.push(this._names.getDetectorName(r.directiveIndex) + " = this.getDetectorFor(directives, " + i + ");");
}
}
return res.join("\n");
};
CodegenLogicUtil.prototype.genContentLifecycleCallbacks = function (directiveRecords) {
var res = [];
var eq = lang_1.IS_DART ? '==' : '===';
// NOTE(kegluneq): Order is important!
for (var i = directiveRecords.length - 1; i >= 0; --i) {
var dir = directiveRecords[i];
if (dir.callAfterContentInit) {
res.push("if(" + this._names.getStateName() + " " + eq + " " + this._changeDetectorStateName + ".NeverChecked) " + this._names.getDirectiveName(dir.directiveIndex) + ".afterContentInit();");
}
if (dir.callAfterContentChecked) {
res.push(this._names.getDirectiveName(dir.directiveIndex) + ".afterContentChecked();");
}
}
return res;
};
CodegenLogicUtil.prototype.genViewLifecycleCallbacks = function (directiveRecords) {
var res = [];
var eq = lang_1.IS_DART ? '==' : '===';
// NOTE(kegluneq): Order is important!
for (var i = directiveRecords.length - 1; i >= 0; --i) {
var dir = directiveRecords[i];
if (dir.callAfterViewInit) {
res.push("if(" + this._names.getStateName() + " " + eq + " " + this._changeDetectorStateName + ".NeverChecked) " + this._names.getDirectiveName(dir.directiveIndex) + ".afterViewInit();");
}
if (dir.callAfterViewChecked) {
res.push(this._names.getDirectiveName(dir.directiveIndex) + ".afterViewChecked();");
}
}
return res;
};
return CodegenLogicUtil;
})();
exports.CodegenLogicUtil = CodegenLogicUtil;
//# sourceMappingURL=codegen_logic_util.js.map