// Copyright (c) 2018 The Chromium Embedded Framework Authors. All rights

// reserved. Use of this source code is governed by a BSD-style license that

// can be found in the LICENSE file.

package tests.detailed;

import org.cef.CefApp;

import org.cef.browser.CefBrowser;

import org.cef.handler.CefLifeSpanHandlerAdapter;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import javax.swing.JFrame;

import javax.swing.SwingUtilities;

public class BrowserFrame extends JFrame {

private volatile boolean isClosed_ = false;

private CefBrowser browser_ = null;

private static int browserCount_ = 0;

private Runnable afterParentChangedAction_ = null;

public BrowserFrame() {

this(null);

}

public BrowserFrame(String title) {

super(title);

// Browser window closing works as follows:

// 1. Clicking the window X button calls WindowAdapter.windowClosing.

// 2. WindowAdapter.windowClosing calls CefBrowser.close(false).

// 3. CEF calls CefLifeSpanHandler.doClose() which calls CefBrowser.doClose()

// which returns true (canceling the close).

// 4. CefBrowser.doClose() triggers another call to WindowAdapter.windowClosing.

// 5. WindowAdapter.windowClosing calls CefBrowser.close(true).

// 6. For windowed browsers CEF destroys the native window handle. For OSR

// browsers CEF calls CefLifeSpanHandler.doClose() which calls

// CefBrowser.doClose() again which returns false (allowing the close).

// 7. CEF calls CefLifeSpanHandler.onBeforeClose and the browser is destroyed.

//

// On macOS pressing Cmd+Q results in a call to CefApp.handleBeforeTerminate

// which calls CefBrowser.close(true) for each existing browser. CEF then calls

// CefLifeSpanHandler.onBeforeClose and the browser is destroyed.

//

// Application shutdown works as follows:

// 1. CefLifeSpanHandler.onBeforeClose calls CefApp.getInstance().dispose()

// when the last browser window is destroyed.

// 2. CefAppHandler.stateHasChanged terminates the application by calling

// System.exit(0) when the state changes to CefAppState.TERMINATED.

addWindowListener(new WindowAdapter() {

@Override

public void windowClosing(WindowEvent e) {

if (browser_ == null) {

// If there's no browser we can dispose immediately.

isClosed_ = true;

System.out.println("BrowserFrame.windowClosing Frame.dispose");

dispose();

return;

}

boolean isClosed = isClosed_;

if (isClosed) {

// Cause browser.doClose() to return false so that OSR browsers

// can close.

browser_.setCloseAllowed();

}

// Results in another call to this method.

System.out.println("BrowserFrame.windowClosing CefBrowser.close(" + isClosed + ")");

browser_.close(isClosed);

if (!isClosed_) {

isClosed_ = true;

}

if (isClosed) {

// Dispose after the 2nd call to this method.

System.out.println("BrowserFrame.windowClosing Frame.dispose");

dispose();

}

}

});

}

public void setBrowser(CefBrowser browser) {

if (browser_ == null) browser_ = browser;

browser_.getClient().removeLifeSpanHandler();

browser_.getClient().addLifeSpanHandler(new CefLifeSpanHandlerAdapter() {

@Override

public void onAfterCreated(CefBrowser browser) {

System.out.println("BrowserFrame.onAfterCreated id=" + browser.getIdentifier());

browserCount_++;

}

@Override

public void onAfterParentChanged(CefBrowser browser) {

System.out.println(

"BrowserFrame.onAfterParentChanged id=" + browser.getIdentifier());

if (afterParentChangedAction_ != null) {

SwingUtilities.invokeLater(afterParentChangedAction_);

afterParentChangedAction_ = null;

}

}

@Override

public boolean doClose(CefBrowser browser) {

boolean result = browser.doClose();

System.out.println("BrowserFrame.doClose id=" + browser.getIdentifier()

+ " CefBrowser.doClose=" + result);

return result;

}

@Override

public void onBeforeClose(CefBrowser browser) {

System.out.println("BrowserFrame.onBeforeClose id=" + browser.getIdentifier());

if (--browserCount_ == 0) {

System.out.println("BrowserFrame.onBeforeClose CefApp.dispose");

CefApp.getInstance().dispose();

}

}

});

}

public void removeBrowser(Runnable r) {

System.out.println("BrowserFrame.removeBrowser");

afterParentChangedAction_ = r;

// The removeNotify() notification should be sent as a result of calling remove().

// However, it isn't in all cases so we do it manually here.

browser_ = null;

}

public CefBrowser getBrowser() {

return browser_;

}

}