angular2
Version:
Angular 2 - a web framework for modern web apps
137 lines • 28.1 kB
JavaScript
'use strict';"use strict";
var lang_1 = require('angular2/src/facade/lang');
var collection_1 = require('angular2/src/facade/collection');
var constants_1 = require('./constants');
var o = require('../output/output_ast');
var compile_method_1 = require('./compile_method');
var expression_converter_1 = require('./expression_converter');
var compile_binding_1 = require('./compile_binding');
var CompileEventListener = (function () {
function CompileEventListener(compileElement, eventTarget, eventName, listenerIndex) {
this.compileElement = compileElement;
this.eventTarget = eventTarget;
this.eventName = eventName;
this._hasComponentHostListener = false;
this._actionResultExprs = [];
this._method = new compile_method_1.CompileMethod(compileElement.view);
this._methodName =
"_handle_" + santitizeEventName(eventName) + "_" + compileElement.nodeIndex + "_" + listenerIndex;
this._eventParam =
new o.FnParam(constants_1.EventHandlerVars.event.name, o.importType(this.compileElement.view.genConfig.renderTypes.renderEvent));
}
CompileEventListener.getOrCreate = function (compileElement, eventTarget, eventName, targetEventListeners) {
var listener = targetEventListeners.find(function (listener) { return listener.eventTarget == eventTarget &&
listener.eventName == eventName; });
if (lang_1.isBlank(listener)) {
listener = new CompileEventListener(compileElement, eventTarget, eventName, targetEventListeners.length);
targetEventListeners.push(listener);
}
return listener;
};
CompileEventListener.prototype.addAction = function (hostEvent, directive, directiveInstance) {
if (lang_1.isPresent(directive) && directive.isComponent) {
this._hasComponentHostListener = true;
}
this._method.resetDebugInfo(this.compileElement.nodeIndex, hostEvent);
var context = lang_1.isPresent(directiveInstance) ? directiveInstance : o.THIS_EXPR.prop('context');
var actionStmts = expression_converter_1.convertCdStatementToIr(this.compileElement.view, context, hostEvent.handler);
var lastIndex = actionStmts.length - 1;
if (lastIndex >= 0) {
var lastStatement = actionStmts[lastIndex];
var returnExpr = convertStmtIntoExpression(lastStatement);
var preventDefaultVar = o.variable("pd_" + this._actionResultExprs.length);
this._actionResultExprs.push(preventDefaultVar);
if (lang_1.isPresent(returnExpr)) {
// Note: We need to cast the result of the method call to dynamic,
// as it might be a void method!
actionStmts[lastIndex] =
preventDefaultVar.set(returnExpr.cast(o.DYNAMIC_TYPE).notIdentical(o.literal(false)))
.toDeclStmt(null, [o.StmtModifier.Final]);
}
}
this._method.addStmts(actionStmts);
};
CompileEventListener.prototype.finishMethod = function () {
var markPathToRootStart = this._hasComponentHostListener ?
this.compileElement.appElement.prop('componentView') :
o.THIS_EXPR;
var resultExpr = o.literal(true);
this._actionResultExprs.forEach(function (expr) { resultExpr = resultExpr.and(expr); });
var stmts = [markPathToRootStart.callMethod('markPathToRootAsCheckOnce', []).toStmt()]
.concat(this._method.finish())
.concat([new o.ReturnStatement(resultExpr)]);
this.compileElement.view.eventHandlerMethods.push(new o.ClassMethod(this._methodName, [this._eventParam], stmts, o.BOOL_TYPE, [o.StmtModifier.Private]));
};
CompileEventListener.prototype.listenToRenderer = function () {
var listenExpr;
var eventListener = o.THIS_EXPR.callMethod('eventHandler', [
o.fn([this._eventParam], [
new o.ReturnStatement(o.THIS_EXPR.callMethod(this._methodName, [constants_1.EventHandlerVars.event]))
])
]);
if (lang_1.isPresent(this.eventTarget)) {
listenExpr = constants_1.ViewProperties.renderer.callMethod('listenGlobal', [o.literal(this.eventTarget), o.literal(this.eventName), eventListener]);
}
else {
listenExpr = constants_1.ViewProperties.renderer.callMethod('listen', [this.compileElement.renderNode, o.literal(this.eventName), eventListener]);
}
var disposable = o.variable("disposable_" + this.compileElement.view.disposables.length);
this.compileElement.view.disposables.push(disposable);
this.compileElement.view.createMethod.addStmt(disposable.set(listenExpr).toDeclStmt(o.FUNCTION_TYPE, [o.StmtModifier.Private]));
};
CompileEventListener.prototype.listenToDirective = function (directiveInstance, observablePropName) {
var subscription = o.variable("subscription_" + this.compileElement.view.subscriptions.length);
this.compileElement.view.subscriptions.push(subscription);
var eventListener = o.THIS_EXPR.callMethod('eventHandler', [
o.fn([this._eventParam], [o.THIS_EXPR.callMethod(this._methodName, [constants_1.EventHandlerVars.event]).toStmt()])
]);
this.compileElement.view.createMethod.addStmt(subscription.set(directiveInstance.prop(observablePropName)
.callMethod(o.BuiltinMethod.SubscribeObservable, [eventListener]))
.toDeclStmt(null, [o.StmtModifier.Final]));
};
return CompileEventListener;
}());
exports.CompileEventListener = CompileEventListener;
function collectEventListeners(hostEvents, dirs, compileElement) {
var eventListeners = [];
hostEvents.forEach(function (hostEvent) {
compileElement.view.bindings.push(new compile_binding_1.CompileBinding(compileElement, hostEvent));
var listener = CompileEventListener.getOrCreate(compileElement, hostEvent.target, hostEvent.name, eventListeners);
listener.addAction(hostEvent, null, null);
});
collection_1.ListWrapper.forEachWithIndex(dirs, function (directiveAst, i) {
var directiveInstance = compileElement.directiveInstances[i];
directiveAst.hostEvents.forEach(function (hostEvent) {
compileElement.view.bindings.push(new compile_binding_1.CompileBinding(compileElement, hostEvent));
var listener = CompileEventListener.getOrCreate(compileElement, hostEvent.target, hostEvent.name, eventListeners);
listener.addAction(hostEvent, directiveAst.directive, directiveInstance);
});
});
eventListeners.forEach(function (listener) { return listener.finishMethod(); });
return eventListeners;
}
exports.collectEventListeners = collectEventListeners;
function bindDirectiveOutputs(directiveAst, directiveInstance, eventListeners) {
collection_1.StringMapWrapper.forEach(directiveAst.directive.outputs, function (eventName, observablePropName) {
eventListeners.filter(function (listener) { return listener.eventName == eventName; })
.forEach(function (listener) { listener.listenToDirective(directiveInstance, observablePropName); });
});
}
exports.bindDirectiveOutputs = bindDirectiveOutputs;
function bindRenderOutputs(eventListeners) {
eventListeners.forEach(function (listener) { return listener.listenToRenderer(); });
}
exports.bindRenderOutputs = bindRenderOutputs;
function convertStmtIntoExpression(stmt) {
if (stmt instanceof o.ExpressionStatement) {
return stmt.expr;
}
else if (stmt instanceof o.ReturnStatement) {
return stmt.value;
}
return null;
}
function santitizeEventName(name) {
return lang_1.StringWrapper.replaceAll(name, /[^a-zA-Z_]/g, '_');
}
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{isBlank, isPresent, StringWrapper} from 'angular2/src/facade/lang';\nimport {ListWrapper, StringMapWrapper} from 'angular2/src/facade/collection';\nimport {EventHandlerVars, ViewProperties} from './constants';\n\nimport * as o from '../output/output_ast';\nimport {CompileElement} from './compile_element';\nimport {CompileMethod} from './compile_method';\n\nimport {BoundEventAst, DirectiveAst} from '../template_ast';\nimport {CompileDirectiveMetadata} from '../compile_metadata';\n\nimport {convertCdStatementToIr} from './expression_converter';\nimport {CompileBinding} from './compile_binding';\n\nexport class CompileEventListener {\n  private _method: CompileMethod;\n  private _hasComponentHostListener: boolean = false;\n  private _methodName: string;\n  private _eventParam: o.FnParam;\n  private _actionResultExprs: o.Expression[] = [];\n\n  static getOrCreate(compileElement: CompileElement, eventTarget: string, eventName: string,\n                     targetEventListeners: CompileEventListener[]): CompileEventListener {\n    var listener = targetEventListeners.find(listener => listener.eventTarget == eventTarget &&\n                                                         listener.eventName == eventName);\n    if (isBlank(listener)) {\n      listener = new CompileEventListener(compileElement, eventTarget, eventName,\n                                          targetEventListeners.length);\n      targetEventListeners.push(listener);\n    }\n    return listener;\n  }\n\n  constructor(public compileElement: CompileElement, public eventTarget: string,\n              public eventName: string, listenerIndex: number) {\n    this._method = new CompileMethod(compileElement.view);\n    this._methodName =\n        `_handle_${santitizeEventName(eventName)}_${compileElement.nodeIndex}_${listenerIndex}`;\n    this._eventParam =\n        new o.FnParam(EventHandlerVars.event.name,\n                      o.importType(this.compileElement.view.genConfig.renderTypes.renderEvent));\n  }\n\n  addAction(hostEvent: BoundEventAst, directive: CompileDirectiveMetadata,\n            directiveInstance: o.Expression) {\n    if (isPresent(directive) && directive.isComponent) {\n      this._hasComponentHostListener = true;\n    }\n    this._method.resetDebugInfo(this.compileElement.nodeIndex, hostEvent);\n    var context = isPresent(directiveInstance) ? directiveInstance : o.THIS_EXPR.prop('context');\n    var actionStmts = convertCdStatementToIr(this.compileElement.view, context, hostEvent.handler);\n    var lastIndex = actionStmts.length - 1;\n    if (lastIndex >= 0) {\n      var lastStatement = actionStmts[lastIndex];\n      var returnExpr = convertStmtIntoExpression(lastStatement);\n      var preventDefaultVar = o.variable(`pd_${this._actionResultExprs.length}`);\n      this._actionResultExprs.push(preventDefaultVar);\n      if (isPresent(returnExpr)) {\n        // Note: We need to cast the result of the method call to dynamic,\n        // as it might be a void method!\n        actionStmts[lastIndex] =\n            preventDefaultVar.set(returnExpr.cast(o.DYNAMIC_TYPE).notIdentical(o.literal(false)))\n                .toDeclStmt(null, [o.StmtModifier.Final]);\n      }\n    }\n    this._method.addStmts(actionStmts);\n  }\n\n  finishMethod() {\n    var markPathToRootStart = this._hasComponentHostListener ?\n                                  this.compileElement.appElement.prop('componentView') :\n                                  o.THIS_EXPR;\n    var resultExpr: o.Expression = o.literal(true);\n    this._actionResultExprs.forEach((expr) => { resultExpr = resultExpr.and(expr); });\n    var stmts =\n        (<o.Statement[]>[markPathToRootStart.callMethod('markPathToRootAsCheckOnce', []).toStmt()])\n            .concat(this._method.finish())\n            .concat([new o.ReturnStatement(resultExpr)]);\n    this.compileElement.view.eventHandlerMethods.push(new o.ClassMethod(\n        this._methodName, [this._eventParam], stmts, o.BOOL_TYPE, [o.StmtModifier.Private]));\n  }\n\n  listenToRenderer() {\n    var listenExpr;\n    var eventListener = o.THIS_EXPR.callMethod('eventHandler', [\n      o.fn([this._eventParam],\n           [\n             new o.ReturnStatement(\n                 o.THIS_EXPR.callMethod(this._methodName, [EventHandlerVars.event]))\n           ])\n    ]);\n    if (isPresent(this.eventTarget)) {\n      listenExpr = ViewProperties.renderer.callMethod(\n          'listenGlobal', [o.literal(this.eventTarget), o.literal(this.eventName), eventListener]);\n    } else {\n      listenExpr = ViewProperties.renderer.callMethod(\n          'listen', [this.compileElement.renderNode, o.literal(this.eventName), eventListener]);\n    }\n    var disposable = o.variable(`disposable_${this.compileElement.view.disposables.length}`);\n    this.compileElement.view.disposables.push(disposable);\n    this.compileElement.view.createMethod.addStmt(\n        disposable.set(listenExpr).toDeclStmt(o.FUNCTION_TYPE, [o.StmtModifier.Private]));\n  }\n\n  listenToDirective(directiveInstance: o.Expression, observablePropName: string) {\n    var subscription = o.variable(`subscription_${this.compileElement.view.subscriptions.length}`);\n    this.compileElement.view.subscriptions.push(subscription);\n    var eventListener = o.THIS_EXPR.callMethod('eventHandler', [\n      o.fn([this._eventParam],\n           [o.THIS_EXPR.callMethod(this._methodName, [EventHandlerVars.event]).toStmt()])\n    ]);\n    this.compileElement.view.createMethod.addStmt(\n        subscription.set(directiveInstance.prop(observablePropName)\n                             .callMethod(o.BuiltinMethod.SubscribeObservable, [eventListener]))\n            .toDeclStmt(null, [o.StmtModifier.Final]));\n  }\n}\n\nexport function collectEventListeners(hostEvents: BoundEventAst[], dirs: DirectiveAst[],\n                                      compileElement: CompileElement): CompileEventListener[] {\n  var eventListeners: CompileEventListener[] = [];\n  hostEvents.forEach((hostEvent) => {\n    compileElement.view.bindings.push(new CompileBinding(compileElement, hostEvent));\n    var listener = CompileEventListener.getOrCreate(compileElement, hostEvent.target,\n                                                    hostEvent.name, eventListeners);\n    listener.addAction(hostEvent, null, null);\n  });\n  ListWrapper.forEachWithIndex(dirs, (directiveAst, i) => {\n    var directiveInstance = compileElement.directiveInstances[i];\n    directiveAst.hostEvents.forEach((hostEvent) => {\n      compileElement.view.bindings.push(new CompileBinding(compileElement, hostEvent));\n      var listener = CompileEventListener.getOrCreate(compileElement, hostEvent.target,\n                                                      hostEvent.name, eventListeners);\n      listener.addAction(hostEvent, directiveAst.directive, directiveInstance);\n    });\n  });\n  eventListeners.forEach((listener) => listener.finishMethod());\n  return eventListeners;\n}\n\nexport function bindDirectiveOutputs(directiveAst: DirectiveAst, directiveInstance: o.Expression,\n                                     eventListeners: CompileEventListener[]) {\n  StringMapWrapper.forEach(directiveAst.directive.outputs, (eventName, observablePropName) => {\n    eventListeners.filter(listener => listener.eventName == eventName)\n        .forEach(\n            (listener) => { listener.listenToDirective(directiveInstance, observablePropName); });\n  });\n}\n\nexport function bindRenderOutputs(eventListeners: CompileEventListener[]) {\n  eventListeners.forEach(listener => listener.listenToRenderer());\n}\n\nfunction convertStmtIntoExpression(stmt: o.Statement): o.Expression {\n  if (stmt instanceof o.ExpressionStatement) {\n    return stmt.expr;\n  } else if (stmt instanceof o.ReturnStatement) {\n    return stmt.value;\n  }\n  return null;\n}\n\nfunction santitizeEventName(name: string): string {\n  return StringWrapper.replaceAll(name, /[^a-zA-Z_]/g, '_');\n}"]}