nsISelection2 编辑

content/base/public/nsISelection2.idlScriptable Please add a summary to this article. 1.0 66 Introduced Gecko 1.8 Obsolete Gecko 8.0 Inherits from: nsISelection Last changed in Gecko 1.9.1 (Firefox 3.5 / Thunderbird 3.0 / SeaMonkey 2.0)

In Gecko 8.0 this Interface was merged into the nsISelectionPrivate interface.

Method overview

void GetRangesForInterval(in nsIDOMNode beginNode, in PRInt32 beginOffset, in nsIDOMNode endNode, in PRInt32 endOffset, in PRBool allowAdjacent, out PRUint32 resultCount, [retval, array, size_is(resultCount)] out nsIDOMRange results);

void GetRangesForIntervalCOMArray(in nsIDOMNode beginNode, in PRInt32 beginOffset, in nsIDOMNode endNode, in PRInt32 endOffset, in PRBool allowAdjacent, in RangeArray results); Native code only!

void scrollIntoView(in short aRegion, in boolean aIsSynchronous, in short aVPercent, in short aHPercent);

Attributes

Attribute	Type	Description
type	short	Returns the type of the selection (see nsISelectionController for available constants). Read only.

Methods

GetRangesForInterval()

Return array of ranges intersecting with the given DOM interval.

void GetRangesForInterval(
  in nsIDOMNode beginNode,
  in PRInt32 beginOffset,
  in nsIDOMNode endNode,
  in PRInt32 endOffset,
  in PRBool allowAdjacent,
  out PRUint32 resultCount,
  [retval, array, size_is(resultCount)] out nsIDOMRange results
);

Parameters

beginNode

 

beginOffset

 

endNode

 

endOffset

These four parameters represent the range to compare against the selection.

allowAdjacent

Specifies whether the returned ranges are allowed to touch the input range rather than merely overlapping it.

resultCount

Returns the number of ranges that overlap (or touch) the input range.

results

Returns the ranges that overlap (or touch) the input range.

Native code only!

GetRangesForIntervalCOMArray

void GetRangesForIntervalCOMArray(
  in nsIDOMNode beginNode,
  in PRInt32 beginOffset,
  in nsIDOMNode endNode,
  in PRInt32 endOffset,
  in PRBool allowAdjacent,
  in RangeArray results
);

Parameters

beginNode

 

beginOffset

 

endNode

 

endOffset

These four parameters represent the range to compare against the selection.

allowAdjacent

Specifies whether the returned ranges are allowed to touch the input range rather than merely overlapping it.

results

Returns the ranges that overlap (or touch) the input range.

scrollIntoView()

Scrolls a region of the selection, so that it is visible in the scrolled view.

void scrollIntoView(
  in short aRegion,
  in boolean aIsSynchronous,
  in short aVPercent,
  in short aHPercent
);

Parameters

aRegion

The region inside the selection to scroll into view (see selection region constants defined in nsISelectionController).

aIsSynchronous

When true, scrolls the selection into view before returning. If false, posts a request which is processed at some point after the method returns.

aVPercent

How to align the frame vertically. A value of 0 means the frame's upper edge is aligned with the top edge of the visible area. A value of 100 means the frame's bottom edge is aligned with the bottom edge of the visible area. For values in between, the point "aVPercent" down the frame is placed at the point "aVPercent" down the visible area. A value of 50 centers the frame vertically. A value of -1 means move the frame the minimum amount necessary in order for the entire frame to be visible vertically (if possible).

aHPercent

How to align the frame horizontally. A value of 0 means the frame's left edge is aligned with the left edge of the visible area. A value of 100 means the frame's right edge is aligned with the right edge of the visible area. For values in between, the point "aHPercent" across the frame is placed at the point "aHPercent" across the visible area. A value of 50 centers the frame horizontally . A value of -1 means move the frame the minimum amount necessary in order for the entire frame to be visible horizontally (if possible).

See also

• nsISelectionPrivate