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WebEnv.java
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package snap.webapi;
import java.util.function.DoubleConsumer;
import java.util.function.Function;
/**
* This class is an adapter for this package, implementing the fundamental functionality to make it work with
* CheerpJ, TeaVM, JxBrowser.
*/
public abstract class WebEnv<T> {
// The shared Env
private static final WebEnv<Object> _shared = (WebEnv<Object>) createEnv();
/**
* Returns a shared instance.
*/
public static WebEnv<Object> get() { return _shared; }
/**
* Returns a shared instance.
*/
private static WebEnv<?> createEnv()
{
String javaVendor = System.getProperty("java.vendor");
if (javaVendor.contains("Leaning"))
return new snap.webenv.CJWebEnv();
return null; //new JxWebEnv();
}
/**
* Returns a named member of a JavaScript object.
*/
public abstract T getMember(T jsObj, String aName);
/**
* Sets a named member of a JavaScript object.
*/
public abstract void setMember(T jsObj, String aName, T aValue);
/**
* Returns a named member of a JavaScript object.
*/
public abstract String getMemberString(T jsObj, String aName);
/**
* Sets a named member of a JavaScript object.
*/
public abstract void setMemberString(T jsObj, String aName, String aValue);
/**
* Returns a named member of a JavaScript object.
*/
public abstract boolean getMemberBoolean(T jsObj, String aName);
/**
* Sets a named member of a JavaScript object.
*/
public abstract void setMemberBoolean(T jsObj, String aName, boolean aValue);
/**
* Returns a named member of a JavaScript object as int.
*/
public abstract int getMemberInt(T jsObj, String aName);
/**
* Sets a named member of a JavaScript object.
*/
public abstract void setMemberInt(T jsObj, String aName, int aValue);
/**
* Returns a named member of a JavaScript object as double.
*/
public abstract double getMemberDouble(T jsObj, String aName);
/**
* Sets a named member of a JavaScript object as double.
*/
public abstract void setMemberDouble(T jsObj, String aName, double aValue);
/**
* Calls a method.
*/
public abstract Object call(T jsObj, String aName, Object... args);
/**
* Returns an indexed member of a JavaScript object.
*/
public abstract Object getSlot(T jsObj, int anIndex);
/**
* Sets an indexed member of a JavaScript object.
*/
public abstract void setSlot(T jsObj, int anIndex, Object aValue);
/**
* Evaluates given JavaScript string and returns result.
*/
public abstract Object eval(String javaScript);
/**
* Returns the current window.
*/
public abstract Window window();
/**
* Returns the current console.
*/
public abstract Console console();
/**
* Returns a new JavaScript native object.
*/
public T newObject() { return (T) eval("new Object();"); }
/**
* Does await promise for given promise.
*/
public abstract Object awaitForPromise(T aPromise);
/**
* Wrapper method for Web API method.
*/
public void open(String url, String target, String windowFeatures)
{
Window window = get().window();
window.call("open", url, target, windowFeatures);
}
/**
* Request animation frame.
*/
public abstract int requestAnimationFrame(DoubleConsumer callback);
/**
* Schedules a runnable to execute after a delay of given milliseconds.
*/
public abstract void setTimeout(Runnable aRun, int aDelay);
/**
* Schedules a runnable to execute every time a given number of milliseconds elapses.
*/
public abstract int setInterval(Runnable aRun, int aPeriod);
/**
* Stops intervals for given id.
*/
public void clearInterval(int anId)
{
Window window = get().window();
window.call("clearInterval", anId);
}
/**
* Performs click on given HTMLElement JS.
*/
public void click(T jsObj) { call(jsObj, "click"); }
/**
* Returns an array of given length.
*/
public abstract T newArrayJSForLength(int aLength);
/**
* Returns an array of bytes for given array buffer.
*/
public abstract byte[] getBytesArrayForArrayBufferJS(T arrayBufferJS);
/**
* Returns an array of bytes for given typed array.
*/
public abstract byte[] getBytesArrayForTypedArrayJS(T typedArrayJS);
/**
* Returns an array of shorts for given typed array.
*/
public abstract short[] getShortsArrayForTypedArrayJS(T typedArrayJS);
/**
* Returns an array of shorts for given typed array.
*/
public abstract short[] getShortsArrayForChannelIndexAndCount(T typedArrayJS, int channelIndex, int channelCount);
/**
* Returns a typed array of given class for given input.
*/
public abstract T getTypedArrayJSForClassAndObject(Class<?> aClass, Object arrayObject);
/**
* Returns new ImageData for given short array of RGBA color components and width and height.
*/
public abstract T newImageDataJSForRgbaArrayAndWidthAndHeight(Object arrayObject, int aWidth, int aHeight);
/**
* Returns a new Blob for given byte array and type.
*/
public abstract T newBlobJSForBytesAndType(byte[] byteArray, String aType);
/**
* Creates a URL for given blob.
*/
public abstract String createUrlForBlobJS(T blobJS);
/**
* Returns a new File for given name, type and bytes.
*/
public abstract T newFileJSForNameAndTypeAndBytes(String aName, String aType, byte[] byteArray);
/**
* Returns a new FileReader.
*/
public T newFileReaderJS() { return (T) eval("new FileReader();"); }
/**
* Returns a new MutationObserver.
*/
public abstract T newMutationObserver(MutationObserver.Callback aCallback);
/**
* Registers a mutation observer to observe given node for given mutations types object.
*/
public abstract void addMutationObserver(MutationObserver mutationObserver, Node aNode, Object optionsObjJS);
/**
* Returns a new ClipboardItem for given mime type and data string.
*/
public abstract Object newClipboardItemForMimeTypeAndDataString(String mimeType, String dataString);
/**
* Returns a new ClipboardItem for given Blob JS.
*/
public abstract Object newClipboardItemForBlobJS(Object blobJS);
/**
* Returns an array of ClipboardItem JavaScript objects from clipboard.
*/
public abstract Object[] readClipboardItemsJS();
/**
* Writes a given JavaScript array of ClipboardItem JavaScript objects to clipboard.
*/
public abstract void writeClipboardItemsJS(Object clipboardItemsJS);
/**
* Registers an event handler of a specific event type on the EventTarget.
*/
public abstract void addEventListener(EventTarget eventTarget, String aName, EventListener<?> eventLsnr, boolean useCapture);
/**
* Removes an event handler of a specific event type from the EventTarget.
*/
public abstract void removeEventListener(EventTarget eventTarget, String aName, EventListener<?> eventLsnr, boolean useCapture);
/**
* Registers an event handler of a specific event type on the EventTarget.
*/
public void addLoadEventListener(EventTarget eventTarget, EventListener<?> eventLsnr)
{
addEventListener(eventTarget, "load", eventLsnr, false);
}
/**
* Returns whether current thread is event thread.
*/
public abstract boolean isEventThread();
/**
* Starts a new event thread.
*/
public abstract void startNewEventThreadAndWait();
/**
* Stops a new event thread (after delay so this thread can finish).
*/
public abstract void stopEventThreadAndNotify();
/**
* Sets a promise.then() function.
*/
public abstract <T,V> Promise<V> setPromiseThen(Promise<T> aPromise, Function<? super T, ? extends V> aFunc);
/**
* Returns a new DataTransfer for given DataTransfer JavaScript object.
*/
public DataTransfer newDataTransfer() { return newDataTransferForDataTransferJS(null); }
/**
* Returns a new DataTransfer for given DataTransfer JavaScript object.
*/
public abstract DataTransfer newDataTransferForDataTransferJS(T jsObj);
/**
* Returns the DataTransfer from last drop.
*/
public abstract DataTransfer getDropDataTransfer();
/**
* Returns the rendering context object for given type string and JavaScript object.
*/
public abstract Object getRenderingContext(String contextType, T jsObj);
}