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refactor(change_detector): made change detection responsible for processing events

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Closes #3666
This commit is contained in:
vsavkin
2015-08-12 16:26:21 -07:00
committed by Victor Savkin
parent 8b655c7be3
commit 4845583dcf
34 changed files with 837 additions and 1014 deletions
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50
modules/angular2/src/transform/template_compiler/change_detector_codegen.dart
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@ -1,7 +1,6 @@
library angular2.transform.template_compiler.change_detector_codegen;
import 'package:angular2/src/change_detection/change_detection_util.dart';
import 'package:angular2/src/change_detection/coalesce.dart';
import 'package:angular2/src/change_detection/codegen_facade.dart';
import 'package:angular2/src/change_detection/codegen_logic_util.dart';
import 'package:angular2/src/change_detection/codegen_name_util.dart';
@ -9,6 +8,7 @@ import 'package:angular2/src/change_detection/directive_record.dart';
import 'package:angular2/src/change_detection/interfaces.dart';
import 'package:angular2/src/change_detection/proto_change_detector.dart';
import 'package:angular2/src/change_detection/proto_record.dart';
import 'package:angular2/src/change_detection/event_binding.dart';
import 'package:angular2/src/facade/lang.dart' show BaseException;
/// Responsible for generating change detector classes for Angular 2.
@ -74,8 +74,9 @@ class _CodegenState {
/// detail and should not be visible to users.
final String _changeDetectorTypeName;
final String _changeDetectionMode;
final List<ProtoRecord> _records;
final List<DirectiveRecord> _directiveRecords;
final List<ProtoRecord> _records;
final List<EventBinding> _eventBindings;
final CodegenLogicUtil _logic;
final CodegenNameUtil _names;
final bool _generateCheckNoChanges;
@ -86,6 +87,7 @@ class _CodegenState {
this._changeDetectorTypeName,
String changeDetectionStrategy,
this._records,
this._eventBindings,
this._directiveRecords,
this._logic,
this._names,
@ -95,10 +97,9 @@ class _CodegenState {
factory _CodegenState(String typeName, String changeDetectorTypeName,
ChangeDetectorDefinition def) {
var recBuilder = new ProtoRecordBuilder();
def.bindingRecords.forEach((rec) => recBuilder.add(rec, def.variableNames));
var protoRecords = coalesce(recBuilder.records);
var names = new CodegenNameUtil(protoRecords, def.directiveRecords, _UTIL);
var protoRecords = createPropertyRecords(def);
var eventBindings = createEventRecords(def);
var names = new CodegenNameUtil(protoRecords, eventBindings, def.directiveRecords, _UTIL);
var logic = new CodegenLogicUtil(names, _UTIL);
return new _CodegenState._(
def.id,
@ -106,6 +107,7 @@ class _CodegenState {
changeDetectorTypeName,
def.strategy,
protoRecords,
eventBindings,
def.directiveRecords,
logic,
names,
@ -123,6 +125,13 @@ class _CodegenState {
dehydrateDirectives(false);
}
bool handleEvent(eventName, elIndex, locals) {
var ${_names.getPreventDefaultAccesor()} = false;
${_names.genInitEventLocals()}
${_genHandleEvent()}
return ${this._names.getPreventDefaultAccesor()};
}
void detectChangesInRecordsInternal(throwOnChange) {
${_names.genInitLocals()}
var $_IS_CHANGED_LOCAL = false;
@ -152,6 +161,33 @@ class _CodegenState {
''');
}
String _genHandleEvent() {
return _eventBindings.map((eb) => _genEventBinding(eb)).join("\n");
}
String _genEventBinding(EventBinding eb) {
var recs = eb.records.map((r) => _genEventBindingEval(eb, r)).join("\n");
return '''
if (eventName == "${eb.eventName}" && elIndex == ${eb.elIndex}) {
${recs}
}''';
}
String _genEventBindingEval(EventBinding eb, ProtoRecord r){
if (r.lastInBinding) {
var evalRecord = _logic.genEventBindingEvalValue(eb, r);
var prevDefault = _genUpdatePreventDefault(eb, r);
return "${evalRecord}\n${prevDefault}";
} else {
return _logic.genEventBindingEvalValue(eb, r);
}
}
String _genUpdatePreventDefault(EventBinding eb, ProtoRecord r) {
var local = this._names.getEventLocalName(eb, r.selfIndex);
return """if (${local} == false) { ${_names.getPreventDefaultAccesor()} = true; }""";
}
void _writeInitToBuf(StringBuffer buf) {
buf.write('''
$_GEN_PREFIX.preGeneratedProtoDetectors['$_changeDetectorDefId'] =
@ -295,7 +331,7 @@ class _CodegenState {
var oldValue = _names.getFieldName(r.selfIndex);
var newValue = _names.getLocalName(r.selfIndex);
var read = '''
${_logic.genUpdateCurrentValue(r)}
${_logic.genPropertyBindingEvalValue(r)}
''';
var check = '''