org.cef.handler

接口 CefLifeSpanHandler

所有已知实现类:

CefClient, CefLifeSpanHandlerAdapter

public interface CefLifeSpanHandler

Implement this interface to handle events related to browser life span. The methods of this class will be called on the UI thread unless otherwise indicated. (实现此接口以处理与浏览器寿命相关的事件。除非另有说明，否则将在UI线程上调用此类的方法。)

方法概要

限定符和类型	方法和说明
boolean	doClose(CefBrowser browser) Called when a browser has received a request to close. (当浏览器收到关闭请求时调用。)
void	onAfterCreated(CefBrowser browser) Handle creation of a new browser window. (处理新浏览器窗口的创建。)
void	onAfterParentChanged(CefBrowser browser) Called after a browser's native parent window has changed. (在浏览器的本机父窗口更改后调用。)
void	onBeforeClose(CefBrowser browser) Called just before a browser is destroyed. (在浏览器被销毁之前调用。)
boolean	onBeforePopup(CefBrowser browser, CefFrame frame, java.lang.String target_url, java.lang.String target_frame_name) Called on the IO thread before a new popup window is created. (在创建新的弹出窗口之前在IO线程上调用。)

方法详细资料

doClose

boolean doClose(CefBrowser browser)

Called when a browser has received a request to close. If CEF created an OS window for the browser returning false will send an OS close notification to the browser window's top-level owner (e.g. WM_CLOSE on Windows, performClose: on OS-X and "delete_event" on Linux). If no OS window exists (window rendering disabled) returning false will cause the browser object to be destroyed immediately. Return true if the browser is parented to another window and that other window needs to receive close notification via some non-standard technique. (当浏览器收到关闭请求时调用。如果CEF为浏览器创建了OS窗口，则返回false将向浏览器窗口的顶级所有者发送OS关闭通知（例如，在Windows上为WM_CLOSE，在OS-X上为performClose ：，在Linux上为“ delete_event”）。如果不存在OS窗口（禁用了窗口渲染），则返回false将立即破坏浏览器对象。如果浏览器是另一个窗口的父级，并且另一个窗口需要通过某种非标准技术接收关闭通知，则返回true。)

参数:

browser - The browser generating the event. (-浏览器生成事件。)

返回:

False to send an OS close notification to the browser window's top-level owner. (将操作系统关闭通知发送到浏览器窗口的顶级所有者为False。)

onAfterCreated

void onAfterCreated(CefBrowser browser)

Handle creation of a new browser window. (处理新浏览器窗口的创建。)

参数:

browser - The browser generating the event. (-浏览器生成事件。)

onAfterParentChanged

void onAfterParentChanged(CefBrowser browser)

Called after a browser's native parent window has changed. (在浏览器的本机父窗口更改后调用。)

参数:

browser - The browser generating the event. (-浏览器生成事件。)

onBeforeClose

void onBeforeClose(CefBrowser browser)

Called just before a browser is destroyed. Release all references to the browser object and do not attempt to execute any methods on the browser object after this callback returns. If this is a modal window and a custom modal loop implementation was provided in runModal() this callback should be used to exit the custom modal loop. See doClose() documentation for additional usage information. (在浏览器被销毁之前调用。释放所有对浏览器对象的引用，并且在此回调返回之后，不要尝试对浏览器对象执行任何方法。如果这是模态窗口，并且在runModal（）中提供了自定义模态循环实现，则应使用此回调退出自定义模态循环。有关其他用法信息，请参见doClose（）文档。)

参数:

browser - The browser generating the event. (-浏览器生成事件。)

onBeforePopup

boolean onBeforePopup(CefBrowser browser,
                      CefFrame frame,
                      java.lang.String target_url,
                      java.lang.String target_frame_name)

Called on the IO thread before a new popup window is created. (在创建新的弹出窗口之前在IO线程上调用。)

参数:

browser - The source of the popup request. (-弹出请求的来源。)

frame - The source of the popup request. Instance only valid within the scope of this method. (-弹出请求的来源。实例仅在此方法的范围内有效。)

target_url - May be empty if none is specified with the request. (-如果请求中未指定任何内容，则可以为空。)

target_frame_name - May be empty if none is specified with the request. (-如果请求中未指定任何内容，则可以为空。)

返回:

True to cancel creation of the popup window or false to proceed. (如果为True，则取消创建弹出窗口；如果为false，则继续进行。)