从基于xul的firefox插件开始,我需要:
问题:我只能为任何创建的iframe获取第一个页面加载,以触发'onload'或'DOMContentLoaded'事件。对于后续URL,不会触发任何事件。
注意:如果可能的话,我也可以使用hiddenDOMWindow本身......
代码:
var urls = ['http://en.wikipedia.org/wiki/Internet', 'http://en.wikipedia.org/wiki/IPv4', 'http://en.wikipedia.org/wiki/Multicast' ];
visitPage(urls.pop());
function visitPage(url) {
var XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
var hiddenWindow = Components.classes["@mozilla.org/appshell/appShellService;1"].getService
(Components.interfaces.nsIAppShellService).hiddenDOMWindow;
var doc = hiddenWindow.document, iframe = doc.getElementById("my-iframe");
if (!iframe)
{
iframe = doc.createElement("iframe");
//OR: iframe = doc.createElementNS(XUL_NS,"iframe");
iframe.setAttribute("id", "my-iframe");
iframe.setAttribute('style', 'display: none');
iframe.addEventListener("DOMContentLoaded", function (e) {
dump('DOMContentLoaded: '+e.originalTarget.location.href);
visitPage(urls.pop());
});
doc.documentElement.appendChild(iframe);
}
iframe.src = url;
}
答案 0 :(得分:2)
有一些陷阱:
hiddenWindow
平台之间有所不同。它是Mac上的XUL和其他HTML。.setAttribute("src", url);
可靠地导航。以下适用于我(Mac,Win7):
var urls = [
'http://en.wikipedia.org/wiki/Internet',
'http://en.wikipedia.org/wiki/IPv4',
'http://en.wikipedia.org/wiki/Multicast'
];
var hiddenWindow = Components.classes["@mozilla.org/appshell/appShellService;1"].
getService(Components.interfaces.nsIAppShellService).
hiddenDOMWindow;
function visitPage(url) {
var iframe = hiddenWindow.document.getElementById("my-iframe");
if (!iframe) {
// Always use html. The hidden window might be XUL (Mac)
// or just html (other platforms).
iframe = hiddenWindow.document.
createElementNS("http://www.w3.org/1999/xhtml", "iframe");
iframe.setAttribute("id", "my-iframe");
iframe.addEventListener("DOMContentLoaded", function (e) {
console.log("DOMContentLoaded: " +
e.originalTarget.location);
var u = urls.pop();
// Make sure there actually was something left to load.
if (u) {
visitPage(u);
}
});
hiddenWindow.document.documentElement.appendChild(iframe);
}
// Use .setAttribute() to reliably navigate the iframe.
iframe.setAttribute("src", url);
}
visitPage(urls.pop());
请勿重新加载hiddenWindow
本身,否则您将破坏许多其他代码。