gecko-dev/docshell/base/nsIDocShellTreeNode.idl

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 * The Original Code is the Mozilla browser.
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 * Contributor(s):
 *   Travis Bogard <travis@netscape.com>
 *   Steve Clark <buster@netscape.com>
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#include "nsISupports.idl"
#include "nsIDocShellTreeItem.idl"

/**
 * The nsIDocShellTreeNode supplies the methods for interacting with children
 * of a docshell.  These are essentially the methods that turn a single docshell
 * into a docshell tree. 
 */

// XXXbz this interface should probably inherit from nsIDocShellTreeItem, and
// some methods should move from there to here...

[scriptable, uuid(C094F810-A8AB-11d3-AFC6-00A024FFC08C)]
interface nsIDocShellTreeNode : nsISupports
{
	/*
	The current number of DocShells which are immediate children of the 
	this object.
	*/
	readonly attribute long childCount;

	/*
	Add a new child DocShellTreeItem.  Adds to the end of the list.
	Note that this does NOT take a reference to the child.  The child stays
	alive only as long as it's referenced from outside the docshell tree.
	@throws NS_ERROR_ILLEGAL_VALUE if child corresponds to the same
	        object as this treenode or an ancestor of this treenode.
	// XXXbz this should take an nsIDocShellTreeNode, I think.
	*/
	void addChild(in nsIDocShellTreeItem child);

	/*
	Removes a child DocShellTreeItem.
	// XXXbz this should take an nsIDocShellTreeNode, I think.
	*/
	void removeChild(in nsIDocShellTreeItem child);

	/* Return the child at the index requested.  This is 0-based.*/
	nsIDocShellTreeItem getChildAt(in long index);

	/*
	Return the child DocShellTreeItem with the specified name.
	aName - This is the name of the item that is trying to be found.
	aRecurse - Is used to tell the function to recurse through children.
		Note, recursion will only happen through items of the same type.
	aSameType - If this is set only children of the same type will be returned.
	aRequestor - This is the docshellTreeItem that is requesting the find.  This
		parameter is used when recursion is being used to avoid searching the same
		tree again when a child has asked a parent to search for children.

	Note the search is depth first when recursing.
	// XXXbz this should return an nsIDocShellTreeNode, I think.
	*/
	nsIDocShellTreeItem findChildWithName(in wstring aName, in boolean aRecurse,
		in boolean aSameType, in nsIDocShellTreeItem aRequestor);
};