Firefox书签探索不会通过Javascript的第一级

问题描述

我已经写了一些代码来探索我的Firefox书签，但我只得到第一级的书签（即我没有得到在文件夹中的链接）。

例如

• Search_engines /

  
  
  
  
  
  • yahoo.com
  
  



• google.com





在这个例子中，我只能访问Search_engines和google.com而不是yahoo.com



我的函数是递归的，不知道为什么会这样。



我的代码：

$ p $ function browse_bookmark_node（bookmark_node，array）
{
//我们用这个函数探索书签
//遍历这个文件夹的直接子元素
for（var i = 0; i< bookmark_node.childCount; i ++）{
var node = bookmark_node.getChild（i）;
if（node.type == 0）{
//该节点是一个链接，所以我们将它添加到数组
array.push（node.title）;
} else if（node.type == 6）{
//该节点是一个文件夹，所以我们来探索它
browse_bookmark_node（node，array）;



$ b函数wrapper_browse_bookmark_node（bookmark_node）{
//我们使用这个函数来包装函数browse_bookmark_node并跟踪链接
var array = [];
browse_bookmark_node（bookmark_node，array）;
返回数组;
}

//以下所有代码用于访问firefox书签并且正常工作
var historyService = Components.classes [@ mozilla.org/browser/nav-history -service; 1]
.getService（Components.interfaces.nsINavHistoryService）;
var options = historyService.getNewQueryOptions（）;
var query = historyService.getNewQuery（）;

var bookmarksService = Components.classes [@ mozilla.org/browser/nav-bookmarks-service;1]
.getService（Components.interfaces.nsINavBookmarksService）;
var bookmarksMenuFolder = bookmarksService.bookmarksMenuFolder;

query.setFolders（[bookmarksMenuFolder]，1）;

var result = historyService.executeQuery（query，options）;
var rootNode = result.root;
rootNode.containerOpen = true;

//探索书签的函数调用
var links_array = wrapper_browse_bookmark_node（rootNode）;

//使用它后关闭容器！
rootNode.containerOpen = false;





解决方案一个明显的错误是使用 toolbarFolder 作为起点 - 这只是书签工具栏。如果你想要所有的书签（意味着书签菜单，书签工具栏和未分类的书签），你需要改变查询参数：



  query.setFolders （[
 bookmarksService.bookmarksMenuFolder，
 bookmarksService.toolbarFolder，
 bookmarksService.unfiledBookmarksFolder 
]，3）; 
  

另一个问题是获取 childCount 属性一个 nsINavHistoryResultNode 对象 - 没有这样的属性。在您可以访问 nsINavHistoryContainerResultNode 的属性之前，您需要显式或隐式地调用 QueryInterface （通过的instanceof ）。所以我会写：



 } else if（node.type == 6&& node instanceof Components.interfaces.nsINavHistoryContainerResultNode ）{
 var oldOpen = node.containerOpen; 
 node.containerOpen = true; 
 browse_bookmark_node（node，array）; 
 node.containerOpen = oldOpen; 
} 
  




I've written some code to explore my Firefox bookmarks but I only get the first level of bookmarks (i.e. I don't get the links in the folders).

e.g.

• Search_engines /

  • yahoo.com

• google.com

In this example I have only access to Search_engines and google.com not yahoo.com

My function being recursive I don't know why this happens.

my code :

function browse_bookmark_node(bookmark_node, array)
{
    // We explore the bookmarks with this function     
   // iterate over the immediate children of this folder
   for (var i = 0; i < bookmark_node.childCount; i ++) {
       var node = bookmark_node.getChild(i);
       if (node.type ==0) {
          // the node is a link so we add it to the array
          array.push(node.title); 
       } else if (node.type ==6) {
          // the node is a folder so we explore it
          browse_bookmark_node(node, array);
       }
   }
}

function wrapper_browse_bookmark_node(bookmark_node) {
   // We use this function to wrapp the function browse_bookmark_node and keep track of the links
   var array = [];
   browse_bookmark_node(bookmark_node, array);
   return array;
}

// All the code following is used to access firefox bookmarks and works fine
var historyService = Components.classes["@mozilla.org/browser/nav-history-service;1"]
                               .getService(Components.interfaces.nsINavHistoryService);
var options = historyService.getNewQueryOptions();
var query = historyService.getNewQuery();

var bookmarksService = Components.classes["@mozilla.org/browser/nav-bookmarks-service;1"]
                                 .getService(Components.interfaces.nsINavBookmarksService);
var bookmarksMenuFolder = bookmarksService.bookmarksMenuFolder;

query.setFolders([bookmarksMenuFolder], 1);

var result = historyService.executeQuery(query, options);
var rootNode = result.root;
rootNode.containerOpen = true;

// The function call to explore the bookmarks
var links_array = wrapper_browse_bookmark_node(rootNode);

// close a container after using it!
rootNode.containerOpen = false;

解决方案

One obvious mistake is using toolbarFolder as a starting point - that's only the bookmarks toolbar. If you want all bookmarks (meaning bookmarks menu, bookmarks toolbar and unsorted bookmarks) you need to change query parameters:

query.setFolders([
    bookmarksService.bookmarksMenuFolder,
    bookmarksService.toolbarFolder,
    bookmarksService.unfiledBookmarksFolder
], 3);

The other issue is getting childCount property on a nsINavHistoryResultNode object - there is no such property. Before you can access properties of nsINavHistoryContainerResultNode you need to call QueryInterface, either explicitly or implicitly (via instanceof). So I would write:

} else if (node.type == 6 && node instanceof Components.interfaces.nsINavHistoryContainerResultNode) {
    var oldOpen = node.containerOpen;
    node.containerOpen = true;
    browse_bookmark_node(node, array);
    node.containerOpen = oldOpen;
}

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