440 lines
9.3 KiB
JavaScript
440 lines
9.3 KiB
JavaScript
|
|
(function ($) {
|
|
|
|
/**
|
|
* Augment jQuery prototype.
|
|
*/
|
|
|
|
$.fn.antiscroll = function (options) {
|
|
return this.each(function () {
|
|
if ($(this).data('antiscroll')) {
|
|
$(this).data('antiscroll').destroy();
|
|
}
|
|
|
|
$(this).data('antiscroll', new $.Antiscroll(this, options));
|
|
});
|
|
};
|
|
|
|
/**
|
|
* Expose constructor.
|
|
*/
|
|
|
|
$.Antiscroll = Antiscroll;
|
|
|
|
/**
|
|
* Antiscroll pane constructor.
|
|
*
|
|
* @param {Element|jQuery} main pane
|
|
* @parma {Object} options
|
|
* @api public
|
|
*/
|
|
|
|
function Antiscroll (el, opts) {
|
|
this.el = $(el);
|
|
this.options = opts || {};
|
|
|
|
this.x = false !== this.options.x;
|
|
this.y = false !== this.options.y;
|
|
this.padding = undefined == this.options.padding ? 2 : this.options.padding;
|
|
|
|
this.inner = this.el.find('.antiscroll-inner');
|
|
this.inner.css({
|
|
'width': '+=' + scrollbarSize()
|
|
, 'height': '+=' + scrollbarSize()
|
|
});
|
|
|
|
this.refresh();
|
|
};
|
|
|
|
/**
|
|
* refresh scrollbars
|
|
*
|
|
* @api public
|
|
*/
|
|
|
|
Antiscroll.prototype.refresh = function() {
|
|
var needHScroll = this.inner.get(0).scrollWidth > this.el.width()
|
|
, needVScroll = this.inner.get(0).scrollHeight > this.el.height();
|
|
|
|
if (!this.horizontal && needHScroll && this.x) {
|
|
this.horizontal = new Scrollbar.Horizontal(this);
|
|
} else if (this.horizontal && !needHScroll) {
|
|
this.horizontal.destroy();
|
|
this.horizontal = null
|
|
}
|
|
|
|
if (!this.vertical && needVScroll && this.y) {
|
|
this.vertical = new Scrollbar.Vertical(this);
|
|
} else if (this.vertical && !needVScroll) {
|
|
this.vertical.destroy();
|
|
this.vertical = null
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Cleans up.
|
|
*
|
|
* @return {Antiscroll} for chaining
|
|
* @api public
|
|
*/
|
|
|
|
Antiscroll.prototype.destroy = function () {
|
|
if (this.horizontal) {
|
|
this.horizontal.destroy();
|
|
}
|
|
if (this.vertical) {
|
|
this.vertical.destroy();
|
|
}
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Rebuild Antiscroll.
|
|
*
|
|
* @return {Antiscroll} for chaining
|
|
* @api public
|
|
*/
|
|
|
|
Antiscroll.prototype.rebuild = function () {
|
|
this.destroy();
|
|
this.inner.attr('style', '');
|
|
Antiscroll.call(this, this.el, this.options);
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Scrollbar constructor.
|
|
*
|
|
* @param {Element|jQuery} element
|
|
* @api public
|
|
*/
|
|
|
|
function Scrollbar (pane) {
|
|
this.pane = pane;
|
|
this.pane.el.append(this.el);
|
|
this.innerEl = this.pane.inner.get(0);
|
|
|
|
this.dragging = false;
|
|
this.enter = false;
|
|
this.shown = false;
|
|
|
|
// hovering
|
|
this.pane.el.mouseenter($.proxy(this, 'mouseenter'));
|
|
this.pane.el.mouseleave($.proxy(this, 'mouseleave'));
|
|
|
|
// dragging
|
|
this.el.mousedown($.proxy(this, 'mousedown'));
|
|
|
|
// scrolling
|
|
this.pane.inner.scroll($.proxy(this, 'scroll'));
|
|
|
|
// wheel -optional-
|
|
this.pane.inner.bind('mousewheel', $.proxy(this, 'mousewheel'));
|
|
|
|
// show
|
|
var initialDisplay = this.pane.options.initialDisplay;
|
|
|
|
if (initialDisplay !== false) {
|
|
this.show();
|
|
this.hiding = setTimeout($.proxy(this, 'hide'), parseInt(initialDisplay, 10) || 3000);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Cleans up.
|
|
*
|
|
* @return {Scrollbar} for chaining
|
|
* @api public
|
|
*/
|
|
|
|
Scrollbar.prototype.destroy = function () {
|
|
this.el.remove();
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Called upon mouseenter.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Scrollbar.prototype.mouseenter = function () {
|
|
this.enter = true;
|
|
this.show();
|
|
};
|
|
|
|
/**
|
|
* Called upon mouseleave.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Scrollbar.prototype.mouseleave = function () {
|
|
this.enter = false;
|
|
|
|
if (!this.dragging) {
|
|
this.hide();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Called upon wrap scroll.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Scrollbar.prototype.scroll = function () {
|
|
if (!this.shown) {
|
|
this.show();
|
|
if (!this.enter && !this.dragging) {
|
|
this.hiding = setTimeout($.proxy(this, 'hide'), 1500);
|
|
}
|
|
}
|
|
|
|
this.update();
|
|
};
|
|
|
|
/**
|
|
* Called upon scrollbar mousedown.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Scrollbar.prototype.mousedown = function (ev) {
|
|
ev.preventDefault();
|
|
|
|
this.dragging = true;
|
|
|
|
this.startPageY = ev.pageY - parseInt(this.el.css('top'), 10);
|
|
this.startPageX = ev.pageX - parseInt(this.el.css('left'), 10);
|
|
|
|
// prevent crazy selections on IE
|
|
document.onselectstart = function () { return false; };
|
|
|
|
var pane = this.pane
|
|
, move = $.proxy(this, 'mousemove')
|
|
, self = this
|
|
|
|
$(document)
|
|
.mousemove(move)
|
|
.mouseup(function () {
|
|
self.dragging = false;
|
|
document.onselectstart = null;
|
|
|
|
$(document).unbind('mousemove', move);
|
|
|
|
if (!self.enter) {
|
|
self.hide();
|
|
}
|
|
})
|
|
};
|
|
|
|
/**
|
|
* Show scrollbar.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Scrollbar.prototype.show = function (duration) {
|
|
if (!this.shown) {
|
|
this.update();
|
|
this.el.addClass('antiscroll-scrollbar-shown');
|
|
if (this.hiding) {
|
|
clearTimeout(this.hiding);
|
|
this.hiding = null;
|
|
}
|
|
this.shown = true;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Hide scrollbar.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Scrollbar.prototype.hide = function () {
|
|
var autoHide = this.pane.options.autoHide;
|
|
if (autoHide !== false && this.shown) {
|
|
// check for dragging
|
|
this.el.removeClass('antiscroll-scrollbar-shown');
|
|
this.shown = false;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Horizontal scrollbar constructor
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Scrollbar.Horizontal = function (pane) {
|
|
this.el = $('<div class="antiscroll-scrollbar antiscroll-scrollbar-horizontal">');
|
|
Scrollbar.call(this, pane);
|
|
}
|
|
|
|
/**
|
|
* Inherits from Scrollbar.
|
|
*/
|
|
|
|
inherits(Scrollbar.Horizontal, Scrollbar);
|
|
|
|
/**
|
|
* Updates size/position of scrollbar.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Scrollbar.Horizontal.prototype.update = function () {
|
|
var paneWidth = this.pane.el.width()
|
|
, trackWidth = paneWidth - this.pane.padding * 2
|
|
, innerEl = this.pane.inner.get(0)
|
|
|
|
this.el
|
|
.css('width', trackWidth * paneWidth / innerEl.scrollWidth)
|
|
.css('left', trackWidth * innerEl.scrollLeft / innerEl.scrollWidth)
|
|
}
|
|
|
|
/**
|
|
* Called upon drag.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Scrollbar.Horizontal.prototype.mousemove = function (ev) {
|
|
var trackWidth = this.pane.el.width() - this.pane.padding * 2
|
|
, pos = ev.pageX - this.startPageX
|
|
, barWidth = this.el.width()
|
|
, innerEl = this.pane.inner.get(0)
|
|
|
|
// minimum top is 0, maximum is the track height
|
|
var y = Math.min(Math.max(pos, 0), trackWidth - barWidth)
|
|
|
|
innerEl.scrollLeft = (innerEl.scrollWidth - this.pane.el.width())
|
|
* y / (trackWidth - barWidth)
|
|
};
|
|
|
|
/**
|
|
* Called upon container mousewheel.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Scrollbar.Horizontal.prototype.mousewheel = function (ev, delta, x, y) {
|
|
if ((x < 0 && 0 == this.pane.inner.get(0).scrollLeft) ||
|
|
(x > 0 && (this.innerEl.scrollLeft + Math.ceil(this.pane.el.width())
|
|
== this.innerEl.scrollWidth))) {
|
|
ev.preventDefault();
|
|
return false;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Vertical scrollbar constructor
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Scrollbar.Vertical = function (pane) {
|
|
this.el = $('<div class="antiscroll-scrollbar antiscroll-scrollbar-vertical">');
|
|
Scrollbar.call(this, pane);
|
|
};
|
|
|
|
/**
|
|
* Inherits from Scrollbar.
|
|
*/
|
|
|
|
inherits(Scrollbar.Vertical, Scrollbar);
|
|
|
|
/**
|
|
* Updates size/position of scrollbar.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Scrollbar.Vertical.prototype.update = function () {
|
|
var paneHeight = this.pane.el.height()
|
|
, trackHeight = paneHeight - this.pane.padding * 2
|
|
, innerEl = this.innerEl
|
|
|
|
this.el
|
|
.css('height', trackHeight * paneHeight / innerEl.scrollHeight)
|
|
.css('top', trackHeight * innerEl.scrollTop / innerEl.scrollHeight)
|
|
};
|
|
|
|
/**
|
|
* Called upon drag.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Scrollbar.Vertical.prototype.mousemove = function (ev) {
|
|
var paneHeight = this.pane.el.height()
|
|
, trackHeight = paneHeight - this.pane.padding * 2
|
|
, pos = ev.pageY - this.startPageY
|
|
, barHeight = this.el.height()
|
|
, innerEl = this.innerEl
|
|
|
|
// minimum top is 0, maximum is the track height
|
|
var y = Math.min(Math.max(pos, 0), trackHeight - barHeight)
|
|
|
|
innerEl.scrollTop = (innerEl.scrollHeight - paneHeight)
|
|
* y / (trackHeight - barHeight)
|
|
};
|
|
|
|
/**
|
|
* Called upon container mousewheel.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Scrollbar.Vertical.prototype.mousewheel = function (ev, delta, x, y) {
|
|
if ((y > 0 && 0 == this.innerEl.scrollTop) ||
|
|
(y < 0 && (this.innerEl.scrollTop + Math.ceil(this.pane.el.height())
|
|
== this.innerEl.scrollHeight))) {
|
|
ev.preventDefault();
|
|
return false;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Cross-browser inheritance.
|
|
*
|
|
* @param {Function} constructor
|
|
* @param {Function} constructor we inherit from
|
|
* @api private
|
|
*/
|
|
|
|
function inherits (ctorA, ctorB) {
|
|
function f() {};
|
|
f.prototype = ctorB.prototype;
|
|
ctorA.prototype = new f;
|
|
};
|
|
|
|
/**
|
|
* Scrollbar size detection.
|
|
*/
|
|
|
|
var size;
|
|
|
|
function scrollbarSize () {
|
|
if (size === undefined) {
|
|
var div = $(
|
|
'<div class="antiscroll-inner" style="width:50px;height:50px;overflow-y:scroll;'
|
|
+ 'position:absolute;top:-200px;left:-200px;"><div style="height:100px;width:100%">'
|
|
+ '</div>'
|
|
);
|
|
|
|
$('body').append(div);
|
|
var w1 = $(div).innerWidth();
|
|
var w2 = $('div', div).innerWidth();
|
|
$(div).remove();
|
|
|
|
size = w1 - w2;
|
|
}
|
|
|
|
return size;
|
|
};
|
|
|
|
})(jQuery);
|