252 lines
9.5 KiB
Java
252 lines
9.5 KiB
Java
|
// BasicIO.java
|
||
|
|
// FESI Copyright (c) Jean-Marc Lugrin, 1999
|
||
|
|
//
|
||
|
|
// This program is free software; you can redistribute it and/or
|
||
|
|
// modify it under the terms of the GNU Lesser General Public
|
||
|
|
// License as published by the Free Software Foundation; either
|
||
|
|
// version 2 of the License, or (at your option) any later version.
|
||
|
|
|
||
|
|
// This program is distributed in the hope that it will be useful,
|
||
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
// Lesser General Public License for more details.
|
||
|
|
|
||
|
|
// You should have received a copy of the GNU Lesser General Public
|
||
|
|
// License along with this library; if not, write to the Free Software
|
||
|
|
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||
|
|
|
||
|
|
package FESI.Extensions;
|
||
|
|
|
||
|
|
import FESI.Parser.*;
|
||
|
|
import FESI.AST.*;
|
||
|
|
import FESI.Interpreter.*;
|
||
|
|
import FESI.Exceptions.*;
|
||
|
|
import FESI.Data.*;
|
||
|
|
|
||
|
|
import java.io.*;
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Implements basic input/out capabilities for console based (stdin/stdout)
|
||
|
|
* applications.
|
||
|
|
* <P>The few functions allow minimal communication with the user (including
|
||
|
|
* displaying error messages and prompting) in a way portable to windowing
|
||
|
|
* environments.
|
||
|
|
*/
|
||
|
|
public class BasicIO extends Extension implements BasicIOInterface {
|
||
|
|
|
||
|
|
// Implement the EcmaScript functions
|
||
|
|
|
||
|
|
class GlobalObjectWrite extends BuiltinFunctionObject {
|
||
|
|
GlobalObjectWrite(String name, Evaluator evaluator, FunctionPrototype fp) {
|
||
|
|
super(fp, evaluator, name, 1);
|
||
|
|
}
|
||
|
|
public ESValue callFunction(ESObject thisObject,
|
||
|
|
ESValue[] arguments)
|
||
|
|
throws EcmaScriptException {
|
||
|
|
for (int i = 0; i<arguments.length; i++) {
|
||
|
|
System.out.print(arguments[i].toString());
|
||
|
|
}
|
||
|
|
return ESUndefined.theUndefined;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
class GlobalObjectWriteln extends BuiltinFunctionObject {
|
||
|
|
GlobalObjectWriteln(String name, Evaluator evaluator, FunctionPrototype fp) {
|
||
|
|
super(fp, evaluator, name, 1);
|
||
|
|
}
|
||
|
|
public ESValue callFunction(ESObject thisObject,
|
||
|
|
ESValue[] arguments)
|
||
|
|
throws EcmaScriptException {
|
||
|
|
for (int i = 0; i<arguments.length; i++) {
|
||
|
|
System.out.print(arguments[i].toString());
|
||
|
|
}
|
||
|
|
System.out.println();
|
||
|
|
return ESUndefined.theUndefined;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
class GlobalObjectAlert extends BuiltinFunctionObject {
|
||
|
|
GlobalObjectAlert(String name, Evaluator evaluator, FunctionPrototype fp) {
|
||
|
|
super(fp, evaluator, name, 1);
|
||
|
|
}
|
||
|
|
public ESValue callFunction(ESObject thisObject,
|
||
|
|
ESValue[] arguments)
|
||
|
|
throws EcmaScriptException {
|
||
|
|
System.err.print("[[ALERT]] ");
|
||
|
|
for (int i = 0; i<arguments.length; i++) {
|
||
|
|
System.err.print(arguments[i].toString());
|
||
|
|
}
|
||
|
|
System.err.println();
|
||
|
|
return ESUndefined.theUndefined;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
class GlobalObjectPrompt extends BuiltinFunctionObject {
|
||
|
|
GlobalObjectPrompt(String name, Evaluator evaluator, FunctionPrototype fp) {
|
||
|
|
super(fp, evaluator, name, 2);
|
||
|
|
}
|
||
|
|
public ESValue callFunction(ESObject thisObject,
|
||
|
|
ESValue[] arguments)
|
||
|
|
throws EcmaScriptException {
|
||
|
|
String defaultValue = "";
|
||
|
|
String theQuery = "?";
|
||
|
|
if (arguments.length>0) theQuery = arguments[0].toString();
|
||
|
|
if (arguments.length>1) defaultValue = arguments[1].toString();
|
||
|
|
System.out.print(theQuery + " ["+defaultValue+"] ? ");
|
||
|
|
System.out.flush();
|
||
|
|
String response = null;
|
||
|
|
try {
|
||
|
|
response = (new BufferedReader(new InputStreamReader(System.in))).readLine();
|
||
|
|
} catch (IOException e) {
|
||
|
|
// response = null;
|
||
|
|
}
|
||
|
|
if (response==null || response.equals("")) response = defaultValue;
|
||
|
|
return new ESString(response);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
class GlobalObjectConfirm extends BuiltinFunctionObject {
|
||
|
|
GlobalObjectConfirm(String name, Evaluator evaluator, FunctionPrototype fp) {
|
||
|
|
super(fp, evaluator, name, 2);
|
||
|
|
}
|
||
|
|
public ESValue callFunction(ESObject thisObject,
|
||
|
|
ESValue[] arguments)
|
||
|
|
throws EcmaScriptException {
|
||
|
|
String theQuery = "?";
|
||
|
|
if (arguments.length>0) theQuery = arguments[0].toString();
|
||
|
|
System.out.print(theQuery + " [y/n] ? ");
|
||
|
|
System.out.flush();
|
||
|
|
String response = null;
|
||
|
|
try {
|
||
|
|
response = (new BufferedReader(new InputStreamReader(System.in))).readLine();
|
||
|
|
} catch (IOException e) {
|
||
|
|
// response = null;
|
||
|
|
}
|
||
|
|
if (response!=null & response.trim().toLowerCase().startsWith("y")) {
|
||
|
|
return ESBoolean.makeBoolean(true);
|
||
|
|
}
|
||
|
|
return ESBoolean.makeBoolean(false);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
class GlobalObjectExit extends BuiltinFunctionObject {
|
||
|
|
GlobalObjectExit(String name, Evaluator evaluator, FunctionPrototype fp) {
|
||
|
|
super(fp, evaluator, name, 1);
|
||
|
|
}
|
||
|
|
public ESValue callFunction(ESObject thisObject,
|
||
|
|
ESValue[] arguments)
|
||
|
|
throws EcmaScriptException {
|
||
|
|
int status = 0;
|
||
|
|
if (arguments.length>0) {
|
||
|
|
status=arguments[0].toInt32();
|
||
|
|
}
|
||
|
|
|
||
|
|
System.exit(status);
|
||
|
|
return null; // Never reached
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
class GlobalObjectNoop extends BuiltinFunctionObject {
|
||
|
|
GlobalObjectNoop(String name, Evaluator evaluator, FunctionPrototype fp) {
|
||
|
|
super(fp, evaluator, name, 0); // 0 = Just some default value
|
||
|
|
}
|
||
|
|
public ESValue callFunction(ESObject thisObject,
|
||
|
|
ESValue[] arguments)
|
||
|
|
throws EcmaScriptException {
|
||
|
|
|
||
|
|
return ESUndefined.theUndefined;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
class GlobalObjectLoad extends BuiltinFunctionObject {
|
||
|
|
GlobalObjectLoad(String name, Evaluator evaluator, FunctionPrototype fp) {
|
||
|
|
super(fp, evaluator, name, 1); // 0 = Just some default value
|
||
|
|
}
|
||
|
|
public ESValue callFunction(ESObject thisObject,
|
||
|
|
ESValue[] arguments)
|
||
|
|
throws EcmaScriptException {
|
||
|
|
String fileName = null;
|
||
|
|
if (arguments.length>0) fileName = arguments[0].toString();
|
||
|
|
if (fileName == null) throw new EcmaScriptException("Missing file name for load");
|
||
|
|
File file = new File(fileName);
|
||
|
|
ESValue value;
|
||
|
|
try {
|
||
|
|
//value = this.evaluator.evaluateLoadFile(file);
|
||
|
|
value = this.evaluator.evaluateLoadModule(fileName);
|
||
|
|
} catch (EcmaScriptParseException e) {
|
||
|
|
e.setNeverIncomplete();
|
||
|
|
throw e;
|
||
|
|
}
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// Instance variables
|
||
|
|
private Evaluator evaluator = null;
|
||
|
|
private ESObject document = null;
|
||
|
|
private ESObject window = null;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Create a new instance of the BasicIO extension
|
||
|
|
*/
|
||
|
|
public BasicIO () {
|
||
|
|
super();
|
||
|
|
}
|
||
|
|
|
||
|
|
// implements BasicIOInterface
|
||
|
|
public ESObject getDocument() { return document; }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Initialize the extension
|
||
|
|
*/
|
||
|
|
public void initializeExtension(Evaluator evaluator) throws EcmaScriptException {
|
||
|
|
|
||
|
|
this.evaluator = evaluator;
|
||
|
|
|
||
|
|
GlobalObject go = evaluator.getGlobalObject();
|
||
|
|
document = ObjectObject.createObject(evaluator);
|
||
|
|
window = ObjectObject.createObject(evaluator);
|
||
|
|
FunctionPrototype fp = (FunctionPrototype) evaluator.getFunctionPrototype();
|
||
|
|
|
||
|
|
go.putHiddenProperty("document", document);
|
||
|
|
document.putHiddenProperty("write",
|
||
|
|
new GlobalObjectWrite("write", evaluator, fp));
|
||
|
|
document.putHiddenProperty("writeln",
|
||
|
|
new GlobalObjectWriteln("writeln", evaluator, fp));
|
||
|
|
document.putHiddenProperty("open",
|
||
|
|
new GlobalObjectNoop("open", evaluator, fp));
|
||
|
|
document.putHiddenProperty("close",
|
||
|
|
new GlobalObjectNoop("close", evaluator, fp));
|
||
|
|
document.putHiddenProperty("URL", new ESString("file://<unknown>"));
|
||
|
|
|
||
|
|
go.putHiddenProperty("window", window);
|
||
|
|
window.putHiddenProperty("alert",
|
||
|
|
new GlobalObjectAlert("alert", evaluator, fp));
|
||
|
|
window.putHiddenProperty("prompt",
|
||
|
|
new GlobalObjectPrompt("prompt", evaluator, fp));
|
||
|
|
window.putHiddenProperty("confirm",
|
||
|
|
new GlobalObjectConfirm("confirm", evaluator, fp));
|
||
|
|
|
||
|
|
go.putHiddenProperty("write",
|
||
|
|
new GlobalObjectWrite("write", evaluator, fp));
|
||
|
|
go.putHiddenProperty("writeln",
|
||
|
|
new GlobalObjectWriteln("writeln", evaluator, fp));
|
||
|
|
go.putHiddenProperty("alert",
|
||
|
|
new GlobalObjectAlert("alert", evaluator, fp));
|
||
|
|
go.putHiddenProperty("prompt",
|
||
|
|
new GlobalObjectPrompt("prompt", evaluator, fp));
|
||
|
|
go.putHiddenProperty("confirm",
|
||
|
|
new GlobalObjectConfirm("confirm", evaluator, fp));
|
||
|
|
go.putHiddenProperty("exit",
|
||
|
|
new GlobalObjectExit("exit", evaluator, fp));
|
||
|
|
go.putHiddenProperty("load",
|
||
|
|
new GlobalObjectLoad("load", evaluator, fp));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|