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copied!<p>You won't be able to set the URL of a popover to a web URL (it has to be a <code>safari-extension</code> URL), but you can have a popover that contains nothing but an iframe, and tell the popover to load the URL in the iframe.</p> <p>The easiest way to do this is to have a listener for "command" events in the popover itself (which you can create using either the Extension Builder or the extension API; read <a href="https://developer.apple.com/library/safari/documentation/Tools/Conceptual/SafariExtensionGuide/AddingPopovers/AddingPopovers.html#//apple_ref/doc/uid/TP40009977-CH21-SW1" rel="nofollow">the docs</a> if you need a refresher).</p> <pre><code>safari.application.addEventListener("command", function (evt) { if (evt.command == 'DoAddSymbaloo') { document.querySelector('iframe').src = evt.userInfo; // now let's show the popover } }, false); </code></pre> <p>Now you have to show the popover. In order for a popover to become visible at all, it needs to be attached to a toolbar item. I'm going to assume you've already done this, using either the Extension Builder or the API. The way to show a popover programmatically is to use the <code>showPopover</code> method on its toolbar item. So first you have to find the toolbar item that you've attached the popover to. From the popover's script:</p> <pre><code>var myToolbarItem = safari.extension.toolbarItems.filter(function (ti) { return ti.popover == safari.self; })[0]; </code></pre> <p>This just says, "Find the toolbar item whose popover is the same as me, and assign that toolbar item to variable <code>myToolbarItem</code>."</p> <p>If you wish, and if the popover will only be attached to one toolbar item, instead of assigning the found toolbar item to <code>myToolbarItem</code>, you could set it as a property of the popover object, which from the popover's point of view is <code>safari.self</code>: </p> <pre><code>safari.self.toolbarItem = safari.extension.toolbarItems.filter(function (ti) { return ti.popover == safari.self; })[0]; </code></pre> <p>That will provide a convenient way to get the toolbar item associated with the popover from anywhere in the script or from the global page.</p> <p>Now, combining these things:</p> <pre><code>safari.self.toolbarItem = safari.extension.toolbarItems.filter(function (ti) { return ti.popover == safari.self; })[0]; safari.application.addEventListener("command", function (evt) { if (evt.command == 'DoAddSymbaloo') { document.querySelector('iframe').src = evt.userInfo; safari.self.toolbarItem.showPopover(); } }, false); </code></pre> <p>(Edited for simplification of final script.)</p>

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