我在Apple Documentation中找不到类似“closeTab”的事件。
我试过了:
injected.js
window.addEventListener("unload", function(){
// Probably closed.
// Now I need to tell it to the global page.
}, false);
但是我找不到从注入的脚本中向全局页面发送消息的方法。 Messages and Proxies仅提及其他方式。
答案 0 :(得分:3)
对于Safari 5.1以上版本,他们添加了tab close event,您可以通常的方式收听和处理。
答案 1 :(得分:2)
您可以将注入的脚本中的消息发送到全局页面,如下所示:
safari.self.tab.dispatchMessage("messageName", messageData);
(您的全局网页必须能够捕获这些事件):
// register for message callbacks from the injected script
safari.application.addEventListener("message", respondToMessageFunction, false);
至于如何捕捉“标签关闭”事件...你的猜测和我的一样好。我实际上是在试图找到答案。
答案 2 :(得分:1)
在后台使用“验证”事件来检测制表符开关,例如
var popupBackground = {
initialised : false,
activeTab : null,
numberOfTabs : null,
_init : function() {
var that = this;
// on browser initialise reset data
localStorage.clear();
// this initialises the popup dialogue
localStorage["popupOpened"] = false;
// register listeners for application messaging
safari.application.addEventListener("command", function(event){
that.handleCommand(event);
}, false);
safari.application.addEventListener("validate",function(event){
that.validateCommand(event);
}, false);
safari.application.addEventListener("message", function(event){
that.handleMessage(event);
}, false);
},
_getActiveTab : function(){
return safari.application.activeBrowserWindow.activeTab;
},
// commands are validated before being excecuted
validateCommand : function(aEvent) {
var that = this;
// all commands should have the identifier specified in Extension Builder
if (aEvent.command === "togglePopup") {
// check that there is an active tab
if (!aEvent.target.browserWindow.activeTab.url) {
aEvent.target.disabled = true;
} else {
aEvent.target.disabled = false;
}
}
// this is a hack for detecting tab switches, safari does not have a dedicated API like Chrome
if(this.activeTab !== null){
if(this.activeTab !== this._getActiveTab()){
$.each(safari.application.browserWindows, function(aIndex, aWindow) {
$.each(aWindow.tabs, function(aIndex, aTab) {
if(typeof aTab.page !== "undefined"){
// message all tabs about the focus switch event
if (aTab !== that._getActiveTab()) {
aTab.page.dispatchMessage("tabUnfocused");
// set the popup status (incase tab closed with open popup)
localStorage["popupOpened"] = false;
}else{
aTab.page.dispatchMessage("tabFocused");
}
}
});
});
}
}
// set the new active tab
this.activeTab = this._getActiveTab();
}
}
答案 3 :(得分:0)
您可以直接向事件添加侦听器,但到目前为止,我还没有找到正确的选项来检测选项卡何时关闭。
window.onload = function ( event ) {
safari.self.tab.dispatchMessage("onLoad","it's alive!!"); }
window.onfocus = function ( event ) {
safari.self.tab.dispatchMessage("onFocus","it's alive!!"); }
window.onblur = function ( event ) {
safari.self.tab.dispatchMessage("onBlur","it's alive!!"); }
window.onunload = function ( event ) {
safari.self.tab.dispatchMessage("onUnload","it's alive!!"); }
window.ondrop = function ( event ) {
safari.self.tab.dispatchMessage("onDrop","it's alive!!"); }
window.onpagehide = function ( event ) {
safari.self.tab.dispatchMessage("onPagehide","it's alive!!"); }
window.onpageshow = function ( event ) {
safari.self.tab.dispatchMessage("onPageshow","it's alive!!"); }
window.onbeforeunload = function ( event ) {
safari.self.tab.dispatchMessage("onBeforeunload","it's alive!!"); }
window.onchange = function ( event ) {
safari.self.tab.dispatchMessage("onChange","it's alive!!"); }
window.onemptied = function ( event ) {
safari.self.tab.dispatchMessage("onEmptied","it's alive!!"); }
window.onopen = function ( event ) {
safari.self.tab.dispatchMessage("onOpen","it's alive!!"); }
window.onended = function ( event ) {
safari.self.tab.dispatchMessage("onEnded","it's alive!!"); }
window.onerror = function ( event ) {
safari.self.tab.dispatchMessage("onError","it's alive!!"); }
答案 4 :(得分:0)
到目前为止,我还没有找到一种方法让标签告诉全局页面它已经(或即将被)关闭。一个糟糕的解决方法是在全局页面上设置一个计时器,该计时器将定期检查是否已关闭任何选项卡。在活动窗口中关闭选项卡时,将记录以下简单代码:
var tabs = safari.application.activeBrowserWindow.tabs;
var myTimer = setInterval(function (){
for (var i = 0; i < tabs.length; i++) {
if (app.activeBrowserWindow.tabs[i] !== tabs[i]) {
console.log('A tab was closed.');
}
}
tabs = safari.application.activeBrowserWindow.tabs;
}, 1000);
此示例非常无用,因为它不提供有关已关闭的选项卡的任何信息,并且仅在移动选项卡时会产生误报。