/*
* Copyright 2010-2017 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.kotlin.js.translate.context;
import org.jetbrains.annotations.
NotNull;
import org.jetbrains.annotations.
Nullable;
import org.jetbrains.kotlin.js.backend.ast.*;
import org.jetbrains.kotlin.js.backend.ast.metadata.
MetadataProperties;
import static org.jetbrains.kotlin.js.backend.ast.
JsVars.
JsVar;
//TODO: consider renaming to scoping context
public final class
DynamicContext {
@
NotNull
public static
DynamicContext rootContext(@
NotNull JsScope rootScope, @
NotNull JsBlock globalBlock) {
return new
DynamicContext(
rootScope,
globalBlock);
}
@
NotNull
public static
DynamicContext newContext(@
NotNull JsScope scope, @
NotNull JsBlock block) {
return new
DynamicContext(
scope,
block);
}
@
NotNull
private final
JsScope currentScope;
@
NotNull
private final
JsBlock currentBlock;
@
Nullable
private
JsVars vars;
private
DynamicContext(@
NotNull JsScope scope, @
NotNull JsBlock block) {
this.
currentScope =
scope;
this.
currentBlock =
block;
}
@
NotNull
public
DynamicContext innerBlock(@
NotNull JsBlock block) {
return new
DynamicContext(
currentScope,
block);
}
@
NotNull
public
TemporaryVariable declareTemporary(@
Nullable JsExpression initExpression, @
Nullable Object sourceInfo) {
if (
vars == null) {
vars = new
JsVars();
MetadataProperties.
setSynthetic(
vars, true);
currentBlock.
getStatements().
add(
vars);
vars.
setSource(
sourceInfo);
}
JsName temporaryName =
JsScope.
declareTemporary();
JsVar var = new
JsVar(
temporaryName, null);
var.
setSource(
sourceInfo);
MetadataProperties.
setSynthetic(
var, true);
vars.
add(
var);
if (
initExpression != null) {
var.
source(
initExpression.
getSource());
}
return
TemporaryVariable.
create(
temporaryName,
initExpression);
}
void
moveVarsFrom(@
NotNull DynamicContext dynamicContext) {
if (
dynamicContext.
vars != null) {
if (
vars == null) {
vars =
dynamicContext.
vars;
currentBlock.
getStatements().
add(
vars);
} else {
vars.
addAll(
dynamicContext.
vars);
}
dynamicContext.
currentBlock.
getStatements().
remove(
dynamicContext.
vars);
dynamicContext.
vars = null;
}
}
@
NotNull
public
JsScope getScope() {
return
currentScope;
}
@
NotNull
public
JsBlock jsBlock() {
return
currentBlock;
}
}