nsIDroppedLinkHandler 编辑

dom/base/nsIDroppedLinkHandler.idlScriptable Please add a summary to this article. 1.0 66 Introduced Gecko 2.0 Inherits from: nsISupports Last changed in Gecko 2.0 (Firefox 4 / Thunderbird 3.3 / SeaMonkey 2.1)

Method overview

boolean canDropLink(in nsIDOMDragEvent aEvent, in PRBool aAllowSameDocument);

AString dropLink(in nsIDOMDragEvent aEvent, out AString aName, [optional] in boolean aDisallowInherit);

void dropLinks(in nsIDOMDragEvent aEvent, [optional] in boolean aDisallowInherit, [optional] out unsigned long aCount, [retval, array, size_is(aCount)] out nsIDroppedLinkItem aLinks);

Methods

canDropLink()

Determines if a link being dragged can be dropped.

boolean canDropLink(
  in nsIDOMDragEvent aEvent,
  in PRBool aAllowSameDocument
);

Parameters

aEvent

A dragenter or dragover event.

aAllowSameDocument

If false, drops are only allowed if the document of the source of the drag is different from the destination. This check includes any parent, sibling and child frames in the same content tree. If true, the source is not checked.

Return value

true if the link being dragged can be dropped.

Exceptions thrown

Missing Exception

Missing Description

dropLink()

Given a drop event, determines the link being dragged. If a uri is returned the caller can, for instance, load it. If null is returned, there is no valid link to be dropped.

AString dropLink(
  in nsIDOMDragEvent aEvent,
  out AString aName,
  [optional] in boolean aDisallowInherit
);

Parameters

aEvent

A drop event.

aName

The link title if it exists, or an empty string otherwise.

Return value

A uri, or null if there is no valid link to be dropped.

Exceptions thrown

NS_ERROR_DOM_SECURITY_ERR

Error will be thrown and the event canceled if the receiving target should not load the uri for security reasons. This will occur if the source of the drag initiated a link for dragging that it itself cannot access. This prevents a source document from tricking the user into a dragging a chrome url for example.

dropLinks()

Given a drop event, determines the link being dragged. If non-empty links array is returned the caller can, for instance, load it. If empty links array is returned, there is no valid link to be dropped.

void dropLinks(
  in nsIDOMDragEvent aEvent,
  [optional] in boolean aDisallowInherit,
  [optional] out unsigned long aCount,
  [retval, array, size_is(aCount)] out nsIDroppedLinkItem aLinks
);

Parameters

aEvent

A drop event.

aDisallowInherit

 

aCount

Receives the count of aLinks array

aLinks

Recives an array of objects with nsIDroppedLinkItem interface

Return value

Nothing.

See also

• nsIDroppedLinkItem