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Thunderbird扩展:访问mail-urlfield的值(xbl元素)

[英]Thunderbird extension: accessing the value of mail-urlfield (xbl element)

我正在使用雷鸟API,并且试图创建一个按钮来在RSS面板内“警告(url)”原始网站的内容。 据我所知,该元素位于https://github.com/mozilla/releases-comm-central/blob/master/suite/mailnews/msgHdrViewOverlay.xul

 <mail-urlfield id="expandedcontent-baseBox" label="&originalWebsite.label;" collapsed="true"/>

https://github.com/mozilla/releases-comm-central/blob/a9cb7a6e8097e08c81eea8b3927fa82389a8a515/mail/base/content/mailWidgets.xml中,此mail-urlfield被定义为XUL绑定

 <binding id="mail-urlfield" extends="chrome://messenger/content/mailWidgets.xml#mail-headerfield">
    <content>
      <xul:description
                 onclick="if (event.button != 2)
                            openUILink(event.target.textContent, event);"
                 class="headerValue text-link headerValueUrl"
                 anonid="headerValue" flex="1" readonly="true"
                 role="textbox" aria-readonly="true" context="copyUrlPopup"/>
    </content>
  </binding>

document.getElementById返回“ mail-urlfield”,但是我可以获取元素的值(“ http:// ....”)吗? (我尝试了elt.label,elt.value ...)

好的,我知道了:

var x = document.getElementById("expandedcontent-baseBox");
var y = document.getAnonymousElementByAttribute(x,"anonid","headerValue");
var www = y.textContent ;

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