将焦点设置在IE和/或FireFox中的特定选项卡上
将焦点设置在IE和/或FireFox中的特定选项卡上
提问于 2010-05-02 23:20:44
我想写一个应用程序，将监测所有打开的IE / FireFox标签的内容，并触发事件，一旦特定的数据显示在标签中。
我想知道IE/FF是否有API将焦点设置在特定的选项卡上，这样一旦触发事件，我就会将焦点设置在相关的选项卡上。
提前感谢
回答 2
Stack Overflow用户
发布于 2012-05-26 07:06:42
不幸的是，没有特定的API来激活选项卡或将焦点设置到选项卡上。
下面是一个代码，你可以激活标签，但它只是IE特有的！
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using Accessibility;
namespace IETabsInteraction
{
internal class TabActivator
{
#region Nested type: OBJID
private enum OBJID : uint
{
OBJID_WINDOW = 0x00000000,
}
#endregion
#region Declarations
private const int CHILDID_SELF = 0;
private readonly IntPtr _hWnd;
private IAccessible _accessible;
[DllImport("oleacc.dll")]
private static extern int AccessibleObjectFromWindow(IntPtr hwnd, uint id, ref Guid iid,
[In, Out, MarshalAs(UnmanagedType.IUnknown)] ref object
ppvObject);
[DllImport("user32.dll", SetLastError = true)]
private static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass,
string lpszWindow);
[DllImport("oleacc.dll")]
private static extern int AccessibleChildren(IAccessible paccContainer, int iChildStart, int cChildren,
[In, Out, MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 2)] object[] rgvarChildren, out int pcObtained);
#endregion
#region Constructors
internal TabActivator(IntPtr ieHandle)
{
_hWnd = ieHandle;
AccessibleObjectFromWindow(GetDirectUIHWND(ieHandle), OBJID.OBJID_WINDOW, ref _accessible);
CheckForAccessible();
}
private TabActivator(IAccessible acc)
{
if (acc == null)
throw new Exception("Could not get accessible");
_accessible = acc;
}
#endregion
private TabActivator[] Children
{
get
{
var num = 0;
var res = GetAccessibleChildren(_accessible, out num);
if (res == null)
return new TabActivator[0];
var list = new List<TabActivator>(res.Length);
foreach (object obj in res)
{
var acc = obj as IAccessible;
if (acc != null)
list.Add(new TabActivator(acc));
}
return list.ToArray();
}
}
private int ChildCount
{
get { return _accessible.accChildCount; }
}
/// <summary>
/// Gets LocationUrl of the tab
/// </summary>
private string LocationUrl
{
get
{
var url = _accessible.accDescription[CHILDID_SELF];
if (url.Contains(Environment.NewLine))
url = url.Split('\n')[1];
return url;
}
}
private void CheckForAccessible()
{
if (_accessible == null)
throw new Exception("Could not get accessible. Accessible can't be null");
}
internal void ActivateByTabsUrl(string tabsUrl)
{
var tabIndexToActivate = GetTabIndexToActivate(tabsUrl);
AccessibleObjectFromWindow(GetDirectUIHWND(_hWnd), OBJID.OBJID_WINDOW, ref _accessible);
CheckForAccessible();
var index = 0;
var ieDirectUIHWND = new TabActivator(_hWnd);
foreach (var accessor in ieDirectUIHWND.Children)
{
foreach (var child in accessor.Children)
{
foreach (var tab in child.Children)
{
if (tabIndexToActivate >= child.ChildCount - 1)
return;
if (index == tabIndexToActivate)
{
tab.ActivateTab();
return;
}
index++;
}
}
}
}
private void ActivateTab()
{
_accessible.accDoDefaultAction(CHILDID_SELF);
}
private int GetTabIndexToActivate(string tabsUrl)
{
AccessibleObjectFromWindow(GetDirectUIHWND(_hWnd), OBJID.OBJID_WINDOW, ref _accessible);
CheckForAccessible();
var index = 0;
var ieDirectUIHWND = new TabActivator(_hWnd);
foreach (var accessor in ieDirectUIHWND.Children)
{
foreach (var child in accessor.Children)
{
foreach (var tab in child.Children)
{
var tabUrl = tab.LocationUrl;
if (!string.IsNullOrEmpty(tabUrl))
{
if (tab.LocationUrl.Contains(tabsUrl))
return index;
}
index++;
}
}
}
return -1;
}
private IntPtr GetDirectUIHWND(IntPtr ieFrame)
{
// For IE 8:
var directUI = FindWindowEx(ieFrame, IntPtr.Zero, "CommandBarClass", null);
directUI = FindWindowEx(directUI, IntPtr.Zero, "ReBarWindow32", null);
directUI = FindWindowEx(directUI, IntPtr.Zero, "TabBandClass", null);
directUI = FindWindowEx(directUI, IntPtr.Zero, "DirectUIHWND", null);
if (directUI == IntPtr.Zero)
{
// For IE 9:
//directUI = FindWindowEx(ieFrame, IntPtr.Zero, "WorkerW", "Navigation Bar");
directUI = FindWindowEx(ieFrame, IntPtr.Zero, "WorkerW", null);
directUI = FindWindowEx(directUI, IntPtr.Zero, "ReBarWindow32", null);
directUI = FindWindowEx(directUI, IntPtr.Zero, "TabBandClass", null);
directUI = FindWindowEx(directUI, IntPtr.Zero, "DirectUIHWND", null);
}
return directUI;
}
private static int AccessibleObjectFromWindow(IntPtr hwnd, OBJID idObject, ref IAccessible acc)
{
var guid = new Guid("{618736e0-3c3d-11cf-810c-00aa00389b71}"); // IAccessibleobject obj = null;
object obj = null;
var num = AccessibleObjectFromWindow(hwnd, (uint) idObject, ref guid, ref obj);
acc = (IAccessible) obj;
return num;
}
private static object[] GetAccessibleChildren(IAccessible ao, out int childs)
{
childs = 0;
object[] ret = null;
var count = ao.accChildCount;
if (count > 0)
{
ret = new object[count];
AccessibleChildren(ao, 0, count, ret, out childs);
}
return ret;
}
}
}是的，对于这样一个简单的任务，有很多行:)
为了执行它，您需要：
var ie = new ShellWindows();
// check if ie is open and get first tab of the ie
if (ie.Count > 0)
{
var hWnd = (IntPtr)ie.Item(0).HWND;
new TabActivator(hWnd).ActivateByTabsUrl("www.stackoverflow.com");
}这段代码将焦点设置到具有特定URL的选项卡上，但您可以将其更改为激活具有特定标题的选项卡，等等。
Stack Overflow用户
发布于 2010-08-18 22:02:37
您将不得不编写一个附加组件。
标签看起来像内容的窗口，所以你可以使用常规的DOM窗口对象来发现当前标签的一些信息，并做一些事情-- close()，focus()，resizeTo()等。问题是火狐和其他现代浏览器由于默认的弹出窗口阻止行为而抑制或忽略了其中一些事件。此外，由于安全原因，内容无法知道有多少选项卡处于打开状态，或者在其中运行了什么，因此无法对其进行轮询。您所能做的最好的事情就是从一个窗口调用window.opener，找出是哪个窗口打开了它。
要获得完整级别的访问权限，唯一的方法是编写一个附加组件。每种浏览器都有自己的编写插件的方式，其中一些会比其他的更容易编写。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/2753907
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