136 lines
4.5 KiB
JavaScript
136 lines
4.5 KiB
JavaScript
/* ***** BEGIN LICENSE BLOCK *****
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* Distributed under the BSD license:
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*
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* Copyright (c) 2010, Ajax.org B.V.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Ajax.org B.V. nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ***** END LICENSE BLOCK ***** */
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define(function(require, exports, module) {
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"use strict";
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var oop = require("./lib/oop");
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var dom = require("./lib/dom");
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var event = require("./lib/event");
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var EventEmitter = require("./lib/event_emitter").EventEmitter;
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/**
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* class ScrollBar
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*
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* A set of methods for setting and retrieving the editor's scrollbar.
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*
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**/
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/**
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* new ScrollBar(parent)
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* - parent (DOMElement): A DOM element
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*
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* Creates a new `ScrollBar`. `parent` is the owner of the scroll bar.
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*
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**/
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var ScrollBar = function(parent) {
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this.element = dom.createElement("div");
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this.element.className = "ace_scrollbar";
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this.inner = dom.createElement("div");
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this.inner.className = "ace_scrollbar-inner";
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this.element.appendChild(this.inner);
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parent.appendChild(this.element);
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// in OSX lion the scrollbars appear to have no width. In this case resize
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// the to show the scrollbar but still pretend that the scrollbar has a width
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// of 0px
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// in Firefox 6+ scrollbar is hidden if element has the same width as scrollbar
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// make element a little bit wider to retain scrollbar when page is zoomed
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this.width = dom.scrollbarWidth(parent.ownerDocument);
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this.element.style.width = (this.width || 15) + 5 + "px";
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event.addListener(this.element, "scroll", this.onScroll.bind(this));
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};
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(function() {
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oop.implement(this, EventEmitter);
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/**
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* ScrollBar@scroll(e)
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* - e (Object): Contains one property, `"data"`, which indicates the current scroll top position
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*
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* Emitted when the scroll bar, well, scrolls.
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*
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**/
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this.onScroll = function() {
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this._emit("scroll", {data: this.element.scrollTop});
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};
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/**
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* ScrollBar.getWidth() -> Number
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*
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* Returns the width of the scroll bar.
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*
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**/
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this.getWidth = function() {
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return this.width;
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};
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/**
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* ScrollBar.setHeight(height)
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* - height (Number): The new height
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*
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* Sets the height of the scroll bar, in pixels.
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*
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**/
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this.setHeight = function(height) {
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this.element.style.height = height + "px";
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};
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/**
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* ScrollBar.setInnerHeight(height)
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* - height (Number): The new inner height
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*
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* Sets the inner height of the scroll bar, in pixels.
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*
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**/
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this.setInnerHeight = function(height) {
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this.inner.style.height = height + "px";
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};
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/**
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* ScrollBar.setScrollTop(scrollTop)
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* - scrollTop (Number): The new scroll top
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*
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* Sets the scroll top of the scroll bar.
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*
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**/
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// TODO: on chrome 17+ for small zoom levels after calling this function
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// this.element.scrollTop != scrollTop which makes page to scroll up.
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this.setScrollTop = function(scrollTop) {
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this.element.scrollTop = scrollTop;
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};
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}).call(ScrollBar.prototype);
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exports.ScrollBar = ScrollBar;
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});
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