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/* ***** BEGIN LICENSE BLOCK *****
* Distributed under the BSD license:
*
* Copyright (c) 2010, Ajax.org B.V.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Ajax.org B.V. nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ***** END LICENSE BLOCK ***** */
define(function(require, exports, module) {
"use strict";
var oop = require("./lib/oop");
var dom = require("./lib/dom");
var event = require("./lib/event");
var EventEmitter = require("./lib/event_emitter").EventEmitter;
/**
* A set of methods for setting and retrieving the editor's scrollbar.
* @class ScrollBar
**/
/**
* Creates a new `ScrollBar`. `parent` is the owner of the scroll bar.
* @param {DOMElement} parent A DOM element
*
* @constructor
**/
var ScrollBarV = function(parent, renderer) {
this.element = dom.createElement("div");
this.element.className = "ace_scrollbar";
this.inner = dom.createElement("div");
this.inner.className = "ace_scrollbar-inner";
this.element.appendChild(this.inner);
parent.appendChild(this.element);
// in OSX lion the scrollbars appear to have no width. In this case resize the
// element to show the scrollbar but still pretend that the scrollbar has a width
// of 0px
// in Firefox 6+ scrollbar is hidden if element has the same width as scrollbar
// make element a little bit wider to retain scrollbar when page is zoomed
renderer.$scrollbarWidth =
this.width = dom.scrollbarWidth(parent.ownerDocument);
renderer.$scrollbarWidth =
this.width = dom.scrollbarWidth(parent.ownerDocument);
this.fullWidth = this.width;
this.inner.style.width =
this.element.style.width = (this.width || 15) + 5 + "px";
this.setVisible(false);
this.element.style.overflowY = "scroll";
event.addListener(this.element, "scroll", this.onScrollV.bind(this));
};
var ScrollBarH = function(parent, renderer) {
this.element = dom.createElement("div");
this.element.className = "ace_scrollbar-h";
this.inner = dom.createElement("div");
this.inner.className = "ace_scrollbar-inner";
this.element.appendChild(this.inner);
parent.appendChild(this.element);
// in OSX lion the scrollbars appear to have no width. In this case resize the
// element to show the scrollbar but still pretend that the scrollbar has a width
// of 0px
// in Firefox 6+ scrollbar is hidden if element has the same width as scrollbar
// make element a little bit wider to retain scrollbar when page is zoomed
this.height = renderer.$scrollbarWidth;
this.fullHeight = this.height;
this.inner.style.height =
this.element.style.height = (this.height || 15) + 5 + "px";
this.setVisible(false);
this.element.style.overflowX = "scroll";
event.addListener(this.element, "scroll", this.onScrollH.bind(this));
};
(function() {
oop.implement(this, EventEmitter);
this.setVisible = function(show) {
if (show) {
this.element.style.display = "";
if (this.fullWidth)
this.width = this.fullWidth;
if (this.fullHeight)
this.height = this.fullHeight;
} else {
this.element.style.display = "none";
this.height = this.width = 0;
}
};
/**
* Emitted when the scroll bar, well, scrolls.
* @event scroll
* @param {Object} e Contains one property, `"data"`, which indicates the current scroll top position
**/
this.onScrollV = function() {
if (!this.skipEvent) {
this.scrollTop = this.element.scrollTop;
this._emit("scroll", {data: this.scrollTop});
}
this.skipEvent = false;
};
this.onScrollH = function() {
if (!this.skipEvent) {
this.scrollLeft = this.element.scrollLeft;
this._emit("scroll", {data: this.scrollLeft});
}
this.skipEvent = false;
};
/**
* Returns the width of the scroll bar.
* @returns {Number}
**/
this.getWidth = function() {
return this.width;
};
this.getHeight = function() {
return this.height;
};
/**
* Sets the height of the scroll bar, in pixels.
* @param {Number} height The new height
**/
this.setHeight = function(height) {
this.element.style.height = height + "px";
};
this.setWidth = function(width) {
this.element.style.width = width + "px";
};
/**
* Sets the inner height of the scroll bar, in pixels.
* @param {Number} height The new inner height
**/
this.setInnerHeight = function(height) {
this.inner.style.height = height + "px";
};
this.setInnerWidth = function(width) {
this.inner.style.width = width + "px";
};
/**
* Sets the scroll top of the scroll bar.
* @param {Number} scrollTop The new scroll top
**/
// on chrome 17+ for small zoom levels after calling this function
// this.element.scrollTop != scrollTop which makes page to scroll up.
this.setScrollTop = function(scrollTop) {
if (this.scrollTop != scrollTop) {
this.skipEvent = true;
this.scrollTop = this.element.scrollTop = scrollTop;
}
};
this.setScrollLeft = function(scrollLeft) {
if (this.scrollLeft != scrollLeft) {
this.skipEvent = true;
this.scrollLeft = this.element.scrollLeft = scrollLeft;
}
};
}).call(ScrollBarV.prototype);
ScrollBarH.prototype = ScrollBarV.prototype;
exports.ScrollBar = ScrollBarV; // backward compatibility
exports.ScrollBarV = ScrollBarV;
exports.ScrollBarH = ScrollBarH;
});