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101 lines
3.9 KiB
Plaintext
101 lines
3.9 KiB
Plaintext
/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsISupports.idl"
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/**
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* The nsIScrollable is an interface that can be implemented by a control that
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* supports scrolling. This is a generic interface without concern for the
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* type of content that may be inside. It simply deals blindly with scroll
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* position as a composite of the lowest possible scroll position, the highest
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* possible position and the current position lying somewhere between the
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* min and the max.
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*
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* XXXroc in our tree, only get/setDefaultScrollbarPreferences and
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* getScrollbarVisibility are actually used externally. We should gut
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* the rest. nsDocShell is using twips for all these coordinates
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* which is going to confuse people anyway...
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*/
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[scriptable, uuid(919e792a-6490-40b8-bba5-f9e9ad5640c8)]
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interface nsIScrollable : nsISupports
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{
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/*
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Constants declaring the two scroll orientations a scroll bar can be in.
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ScrollOrientation_X - Horizontal scrolling. When passing this
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in to a scroll position method you are requesting or
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setting the positions for the horizontal scroll bar.
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ScrollOrientation_Y - Vertical scrolling. When passing this
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in to a scroll position you are requesting or setting
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the positions for the vertical scroll bar.
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*/
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const long ScrollOrientation_X = 1;
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const long ScrollOrientation_Y = 2;
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/*
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Retrieves or Sets the current thumb position to the curPos passed in for the
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scrolling orientation passed in. curPos should be between minPos and maxPos.
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@return NS_OK - Setting or Getting completed successfully.
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NS_ERROR_INVALID_ARG - returned when curPos is not within the
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minPos and maxPos.
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*/
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long getCurScrollPos(in long scrollOrientation);
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void setCurScrollPos(in long scrollOrientation, in long curPos);
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/*
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This function atomizes the ability to scroll in two dimensions at the same
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time.
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*/
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void setCurScrollPosEx(in long curHorizontalPos, in long curVerticalPos);
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/*
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Retrieves or Sets the valid ranges for the thumb. When maxPos is set to
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something less than the current thumb position, curPos is set = to maxPos.
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@return NS_OK - Setting or Getting completed successfully.
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NS_ERROR_INVALID_ARG - returned when curPos is not within the
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minPos and maxPos.
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*/
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void getScrollRange(in long scrollOrientation, out long minPos, out long maxPos);
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void setScrollRange(in long scrollOrientation, in long minPos, in long maxPos);
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/*
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This function atomizes the ability to set the ranges in two dimensions at
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the same time.
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*/
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void setScrollRangeEx(in long minHorizontalPos, in long maxHorizontalPos,
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in long minVerticalPos, in long maxVerticalPos);
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/*
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Constants declaring the states of the scroll bars.
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ScrollPref_Auto - bars visible only when needed.
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ScrollPref_Never - bars never visible, even when scrolling still possible.
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ScrollPref_Always - bars always visible, even when scrolling is not possible
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*/
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const long Scrollbar_Auto = 1;
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const long Scrollbar_Never = 2;
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const long Scrollbar_Always = 3;
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/*
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Retrieves or Set the preferences for the scroll bar.
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current is 'scrolling preference for this document'
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default is 'scrolling preference for all documents in this shell'
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resetScrollbarPreferences resets current to default
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*/
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long getDefaultScrollbarPreferences(in long scrollOrientation);
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void setDefaultScrollbarPreferences(in long scrollOrientation, in long scrollbarPref);
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/*
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Get information about whether the vertical and horizontal scrollbars are
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currently visible. nullptr is a valid argument. If you are only interested
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in one of the visibility settings pass nullptr in for the one you aren't
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interested in.
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*/
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void getScrollbarVisibility(out boolean verticalVisible,
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out boolean horizontalVisible);
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};
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