org.teavm.html4j.JavaScriptConvGenerator Maven / Gradle / Ivy
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A set of interceptors and hacks for TeaVM to support html4j
/*
* Copyright 2014 Alexey Andreev.
*
* 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.teavm.html4j;
import java.io.IOException;
import org.teavm.backend.javascript.codegen.SourceWriter;
import org.teavm.backend.javascript.spi.Generator;
import org.teavm.backend.javascript.spi.GeneratorContext;
import org.teavm.model.*;
public class JavaScriptConvGenerator implements Generator {
static final MethodReference intValueMethod = new MethodReference(Integer.class, "intValue", int.class);
static final MethodReference booleanValueMethod = new MethodReference(Boolean.class, "booleanValue", boolean.class);
static final MethodReference byteValueMethod = new MethodReference(Byte.class, "byteValue", byte.class);
static final MethodReference shortValueMethod = new MethodReference(Byte.class, "shortValue", short.class);
static final MethodReference doubleValueMethod = new MethodReference(Double.class, "doubleValue", double.class);
static final MethodReference charValueMethod = new MethodReference(Character.class, "charValue", char.class);
static final MethodReference valueOfByteMethod = new MethodReference(Byte.class, "valueOf",
byte.class, Byte.class);
static final MethodReference valueOfShortMethod = new MethodReference(Short.class, "valueOf",
short.class, Short.class);
static final MethodReference valueOfIntMethod = new MethodReference(Integer.class, "valueOf",
int.class, Integer.class);
static final MethodReference valueOfLongMethod = new MethodReference(Long.class, "valueOf",
long.class, Long.class);
static final MethodReference valueOfBooleanMethod = new MethodReference(Boolean.class, "valueOf",
boolean.class, Boolean.class);
static final MethodReference valueOfDoubleMethod = new MethodReference(Double.class, "valueOf",
double.class, Double.class);
static final MethodReference valueOfCharMethod = new MethodReference(Character.class, "valueOf",
char.class, Character.class);
static final MethodReference toJsMethod = new MethodReference(JavaScriptConv.class, "toJavaScript",
Object.class, Object.class);
static final MethodReference fromJsMethod = new MethodReference(JavaScriptConv.class, "fromJavaScript",
Object.class, Object.class, Object.class);
@Override
public void generate(GeneratorContext context, SourceWriter writer, MethodReference methodRef) throws IOException {
switch (methodRef.getName()) {
case "toJavaScript":
generateToJavaScript(context, writer);
break;
case "fromJavaScript":
generateFromJavaScript(context, writer);
break;
}
}
private void generateToJavaScript(GeneratorContext context, SourceWriter writer) throws IOException {
String obj = context.getParameterName(1);
writer.append("if (" + obj + " === null || " + obj + " === undefined) {").softNewLine().indent();
writer.append("return null;").softNewLine();
writer.outdent().append("} else if (typeof " + obj + " === 'number') {").indent().softNewLine();
writer.append("return " + obj + ";").softNewLine();
writer.outdent().append("} else if (" + obj + ".constructor.$meta && " + obj + ".constructor.$meta.item) {")
.indent().softNewLine();
writer.append("var arr = new Array(" + obj + ".data.length);").softNewLine();
writer.append("for (var i = 0; i < arr.length; ++i) {").indent().softNewLine();
writer.append("arr[i] = ").appendMethodBody(toJsMethod).append("(" + obj + ".data[i]);").softNewLine();
writer.outdent().append("}").softNewLine();
writer.append("return arr;").softNewLine();
writer.outdent().append("} else if (" + obj + ".constructor === ").appendClass("java.lang.String")
.append(") {").indent().softNewLine();
generateStringToJavaScript(context, writer);
writer.outdent().append("} else if (" + obj + ".constructor === ").appendClass("java.lang.Byte")
.append(") {").indent().softNewLine();
writer.append("return ").appendMethodBody(byteValueMethod).append("(" + obj + ")|0;").softNewLine();
writer.outdent().append("} else if (" + obj + ".constructor === ").appendClass("java.lang.Short")
.append(") {").indent().softNewLine();
writer.append("return ").appendMethodBody(shortValueMethod).append("(" + obj + ")|0;").softNewLine();
writer.outdent().append("} else if (" + obj + ".constructor === ").appendClass("java.lang.Integer")
.append(") {").indent().softNewLine();
writer.append("return ").appendMethodBody(intValueMethod).append("(" + obj + ")|0;").softNewLine();
writer.outdent().append("} else if (" + obj + ".constructor === ").appendClass("java.lang.Boolean")
.append(") {").indent().softNewLine();
writer.append("return ").appendMethodBody(booleanValueMethod).append("(" + obj + ")!==0;").softNewLine();
writer.outdent().append("} else if (" + obj + ".constructor === ").appendClass("java.lang.Double")
.append(") {").indent().softNewLine();
writer.append("return ").appendMethodBody(doubleValueMethod).append("(" + obj + ");").softNewLine();
writer.outdent().append("} else if (" + obj + ".constructor === ").appendClass("java.lang.Character")
.append(") {").indent().softNewLine();
writer.append("return ").appendMethodBody(charValueMethod).append("(" + obj + ");").softNewLine();
writer.outdent().append("} else {").indent().softNewLine();
writer.append("return " + obj + ";").softNewLine();
writer.outdent().append("}").softNewLine();
}
private void generateFromJavaScript(GeneratorContext context, SourceWriter writer) throws IOException {
String obj = context.getParameterName(1);
String type = context.getParameterName(2);
writer.append("if (" + obj + " === null || " + obj + " === undefined)").ws().append("{")
.softNewLine().indent();
writer.append("return null;").softNewLine();
writer.outdent().append("} else if (" + type + ".$meta.item) {").indent().softNewLine();
writer.append("var arr = $rt_createArray(" + type + ".$meta.item, " + obj + ".length);").softNewLine();
writer.append("for (var i = 0; i < arr.data.length; ++i) {").indent().softNewLine();
writer.append("arr.data[i] = ").appendMethodBody(fromJsMethod).append("(" + obj + "[i], "
+ type + ".$meta.item);").softNewLine();
writer.outdent().append("}").softNewLine();
writer.append("return arr;").softNewLine();
writer.outdent().append("} else if (" + type + " === ").appendClass("java.lang.String")
.append(") {").indent().softNewLine();
writer.append("return $rt_str(" + obj + ");").softNewLine();
writer.outdent().append("} else if (" + type + " === ").appendClass("java.lang.Boolean")
.append(") {").indent().softNewLine();
writer.append("return ").appendMethodBody(valueOfBooleanMethod).append("(" + obj + "?1:0);").softNewLine();
writer.outdent().append("} else if (" + type + " === ").appendClass("java.lang.Character")
.append(") {").indent().softNewLine();
writer.append("return ").appendMethodBody(valueOfCharMethod).append("(typeof " + obj + " === 'number' ? "
+ obj + " & 0xFFFF : " + obj + ".charCodeAt(0));").softNewLine();
writer.outdent().append("} else if (" + type + " === ").appendClass("java.lang.Byte")
.append(") {").indent().softNewLine();
writer.append("return ").appendMethodBody(valueOfByteMethod).append("(" + obj + "|0);").softNewLine();
writer.outdent().append("} else if (" + type + " === ").appendClass("java.lang.Short")
.append(") {").indent().softNewLine();
writer.append("return ").appendMethodBody(valueOfShortMethod).append("(" + obj + "|0);").softNewLine();
writer.outdent().append("} else if (" + type + " === ").appendClass("java.lang.Integer")
.append(") {").indent().softNewLine();
writer.append("return ").appendMethodBody(valueOfIntMethod).append("(" + obj + "|0);").softNewLine();
writer.outdent().append("} else if (" + type + " === ").appendClass("java.lang.Long")
.append(") {").indent().softNewLine();
writer.append("return ").appendMethodBody(valueOfLongMethod).append("(Long_fromInt(" + obj + "|0));")
.softNewLine();
writer.outdent().append("} else if (" + type + " === ").appendClass("java.lang.Double")
.append(") {").indent().softNewLine();
writer.append("return ").appendMethodBody(valueOfDoubleMethod).append("(" + obj + ");").softNewLine();
writer.outdent().append("} else if (" + type + " === $rt_intcls() || " + type + " === $rt_bytecls() || "
+ type + " === $rt_shortcls() ||" + type + " == $rt_charcls()) {").indent().softNewLine();
writer.append("return " + obj + "|0;").softNewLine();
writer.outdent().append("} else if (" + type + " === $rt_longcls()) {").indent().softNewLine();
writer.append("return Long_fromInt(" + obj + "|0);").softNewLine();
writer.outdent().append("} else if (" + type + " === $rt_doublecls() || " + type + " == $rt_floatcls()) {")
.indent().softNewLine();
writer.append("return " + obj + ";").softNewLine();
writer.outdent().append("} else if (" + type + " === $rt_booleancls()) {").indent().softNewLine();
writer.append("return " + obj + "?1:0;").softNewLine();
writer.outdent().append("} else if (" + obj + " instanceof Array) {").indent().softNewLine();
writer.append("var arr = $rt_createArray($rt_objcls(), " + obj + ".length);").softNewLine();
writer.append("for (var i = 0; i < arr.data.length; ++i) {").indent().softNewLine();
writer.append("arr.data[i] = ").appendMethodBody(fromJsMethod).append("(" + obj + "[i], $rt_objcls());")
.softNewLine();
writer.outdent().append("}").softNewLine();
writer.append("return arr;").softNewLine();
writer.outdent().append("} else if (typeof " + obj + " === 'string') {").indent().softNewLine();
writer.append("return $rt_str(" + obj + ");").softNewLine();
writer.outdent().append("} else if (typeof " + obj + " === 'number') {").indent().softNewLine();
writer.append("if ((" + obj + "|0) === " + obj + ") {").indent().softNewLine();
writer.append("return ").appendMethodBody(valueOfIntMethod).append("(" + obj + ");").softNewLine();
writer.outdent().append("} else {").indent().softNewLine();
writer.append("return ").appendMethodBody(valueOfDoubleMethod).append("(" + obj + ");").softNewLine();
writer.outdent().append("}").softNewLine();
writer.outdent().append("} else if (typeof " + obj + " === 'boolean') {").indent().softNewLine();
writer.append("return ").appendMethodBody(valueOfBooleanMethod).append("(" + obj + "?1:0);").softNewLine();
writer.outdent().append("} else {").indent().softNewLine();
writer.append("return ").append(obj).append(";").softNewLine();
writer.outdent().append("}").softNewLine();
}
private void generateStringToJavaScript(GeneratorContext context, SourceWriter writer) throws IOException {
FieldReference charsField = new FieldReference("java.lang.String", "characters");
writer.append("var result = \"\";").softNewLine();
writer.append("var data = ").append(context.getParameterName(1)).append('.')
.appendField(charsField).append(".data;").softNewLine();
writer.append("for (var i = 0; i < data.length; i = (i + 1) | 0) {").indent().softNewLine();
writer.append("result += String.fromCharCode(data[i]);").softNewLine();
writer.outdent().append("}").softNewLine();
writer.append("return result;").softNewLine();
}
}