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A headless browser intended for use in testing web-based applications.
/*
* Copyright (c) 2002-2014 Gargoyle Software Inc.
*
* 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 com.gargoylesoftware.htmlunit.activex.javascript.msxml;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import net.sourceforge.htmlunit.corejs.javascript.Context;
import net.sourceforge.htmlunit.corejs.javascript.FunctionObject;
import net.sourceforge.htmlunit.corejs.javascript.Scriptable;
import net.sourceforge.htmlunit.corejs.javascript.ScriptableObject;
import org.apache.commons.lang3.StringUtils;
import com.gargoylesoftware.htmlunit.BrowserVersion;
import com.gargoylesoftware.htmlunit.javascript.ScriptableWithFallbackGetter;
import com.gargoylesoftware.htmlunit.javascript.SimpleScriptable;
import com.gargoylesoftware.htmlunit.javascript.configuration.ClassConfiguration;
/**
* JavaScript environment for the MSXML ActiveX library.
*
* @version $Revision: 9017 $
* @author Frank Danek
*/
public class MSXMLJavaScriptEnvironment {
private final MSXMLConfiguration config_;
private Map, Scriptable> prototypes_;
/**
* Creates an instance for the given {@link BrowserVersion}.
*
* @param browserVersion the browser version to use
* @throws Exception if something goes wrong
*/
@SuppressWarnings("unchecked")
public MSXMLJavaScriptEnvironment(final BrowserVersion browserVersion) throws Exception {
config_ = MSXMLConfiguration.getInstance(browserVersion);
final Map prototypesPerJSName = new HashMap();
final Map, Scriptable> prototypes =
new HashMap, Scriptable>();
// put custom object to be called as very last prototype to call the fallback getter (if any)
final Scriptable fallbackCaller = new FallbackCaller();
for (final ClassConfiguration config : config_.getAll()) {
final ScriptableObject prototype = configureClass(config);
if (config.isJsObject()) {
prototypes.put((Class) config.getHostClass(), prototype);
}
prototypesPerJSName.put(config.getHostClass().getSimpleName(), prototype);
}
// once all prototypes have been build, it's possible to configure the chains
// final Scriptable objectPrototype = ScriptableObject.getObjectPrototype(window);
for (final Map.Entry entry : prototypesPerJSName.entrySet()) {
final String name = entry.getKey();
final ClassConfiguration config = config_.getClassConfiguration(name);
Scriptable prototype = entry.getValue();
if (prototype.getPrototype() != null) {
prototype = prototype.getPrototype(); // "double prototype" hack for FF
}
if (!StringUtils.isEmpty(config.getExtendedClassName())) {
final Scriptable parentPrototype = prototypesPerJSName.get(config.getExtendedClassName());
prototype.setPrototype(parentPrototype);
}
else {
// prototype.setPrototype(objectPrototype);
prototype.setPrototype(fallbackCaller);
}
}
prototypes_ = prototypes;
}
/**
* Configures the specified class for access via JavaScript.
* @param config the configuration settings for the class to be configured
* @param window the scope within which to configure the class
* @throws InstantiationException if the new class cannot be instantiated
* @throws IllegalAccessException if we don't have access to create the new instance
* @return the created prototype
*/
private ScriptableObject configureClass(final ClassConfiguration config/*, final Scriptable window*/)
throws InstantiationException, IllegalAccessException {
final Class jsHostClass = config.getHostClass();
final ScriptableObject prototype = (ScriptableObject) jsHostClass.newInstance();
// prototype.setParentScope(window);
configureConstantsPropertiesAndFunctions(config, prototype);
return prototype;
}
/**
* Configures constants, properties and functions on the object.
* @param config the configuration for the object
* @param scriptable the object to configure
*/
private void configureConstantsPropertiesAndFunctions(final ClassConfiguration config,
final ScriptableObject scriptable) {
// the constants
configureConstants(config, scriptable);
// the properties
for (final Entry propertyEntry : config.propertyEntries()) {
final String propertyName = propertyEntry.getKey();
final Method readMethod = propertyEntry.getValue().getReadMethod();
final Method writeMethod = propertyEntry.getValue().getWriteMethod();
scriptable.defineProperty(propertyName, null, readMethod, writeMethod, ScriptableObject.EMPTY);
}
final int attributes = ScriptableObject.DONTENUM;
// the functions
for (final Entry functionInfo : config.functionEntries()) {
final String functionName = functionInfo.getKey();
final Method method = functionInfo.getValue();
final FunctionObject functionObject = new FunctionObject(functionName, method, scriptable);
scriptable.defineProperty(functionName, functionObject, attributes);
}
}
private void configureConstants(final ClassConfiguration config,
final ScriptableObject scriptable) {
final Class linkedClass = config.getHostClass();
for (final String constant : config.constants()) {
try {
final Object value = linkedClass.getField(constant).get(null);
scriptable.defineProperty(constant, value, ScriptableObject.EMPTY);
}
catch (final Exception e) {
throw Context.reportRuntimeError("Cannot get field '" + constant + "' for type: "
+ config.getHostClass().getName());
}
}
}
/**
* Gets the class of the JavaScript object for the node class.
* @param c the node class DomNode or some subclass.
* @return null if none found
*/
@SuppressWarnings("unchecked")
public Class getJavaScriptClass(final Class c) {
return (Class) config_.getDomJavaScriptMapping().get(c);
}
/**
* Returns the prototype object corresponding to the specified HtmlUnit class inside the window scope.
* @param jsClass the class whose prototype is to be returned
* @return the prototype object corresponding to the specified class inside the specified scope
*/
public Scriptable getPrototype(final Class jsClass) {
return prototypes_.get(jsClass);
}
private static class FallbackCaller extends ScriptableObject {
private static final long serialVersionUID = 1402030469837200894L;
@Override
public Object get(final String name, final Scriptable start) {
if (start instanceof ScriptableWithFallbackGetter) {
return ((ScriptableWithFallbackGetter) start).getWithFallback(name);
}
return NOT_FOUND;
}
@Override
public String getClassName() {
return "htmlUnitHelper-fallbackCaller";
}
}
}