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splitter.js
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splitter.js
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/**
* RoundCube splitter GUI class
*
* @constructor
*/
function rcube_splitter(attrib)
{
this.p1id = attrib.p1;
this.p2id = attrib.p2;
this.id = attrib.id ? attrib.id : this.p1id + '_' + this.p2id + '_splitter';
this.orientation = attrib.orientation;
this.horizontal = (this.orientation == 'horizontal' || this.orientation == 'h');
this.offset = bw.ie6 ? 2 : 0;
this.pos = attrib.start ? attrib.start * 1 : 0;
this.relative = attrib.relative ? true : false;
this.drag_active = false;
this.init = function()
{
this.p1 = document.getElementById(this.p1id);
this.p2 = document.getElementById(this.p2id);
// create and position the handle for this splitter
this.p1pos = this.relative ? $(this.p1).position() : $(this.p1).offset();
this.p2pos = this.relative ? $(this.p2).position() : $(this.p2).offset();
if (this.horizontal)
{
var top = this.p1pos.top + this.p1.offsetHeight;
this.layer = new rcube_layer(this.id, {x: 0, y: top, height: 10,
width: '100%', vis: 1, parent: this.p1.parentNode});
}
else
{
var left = this.p1pos.left + this.p1.offsetWidth;
this.layer = new rcube_layer(this.id, {x: left, y: 0, width: 10,
height: '100%', vis: 1, parent: this.p1.parentNode});
}
this.elm = this.layer.elm;
this.elm.className = 'splitter '+(this.horizontal ? 'splitter-h' : 'splitter-v');
this.elm.unselectable = 'on';
// add the mouse event listeners
rcube_event.add_listener({element: this.elm, event:'mousedown', object:this, method:'onDragStart'});
if (bw.ie)
rcube_event.add_listener({element: window, event:'resize', object:this, method:'onResize'});
// read saved position from cookie
var cookie = bw.get_cookie(this.id);
if (cookie && !isNaN(cookie))
{
this.pos = parseFloat(cookie);
this.resize();
}
else if (this.pos)
{
this.resize();
this.set_cookie();
}
};
/**
* Set size and position of all DOM objects
* according to the saved splitter position
*/
this.resize = function()
{
if (this.horizontal)
{
var lh = this.layer.height - this.offset * 2;
this.p1.style.height = Math.floor(this.pos - this.p1pos.top - lh / 2) + 'px';
this.p2.style.top = Math.ceil(this.pos + lh / 2) + 'px';
this.layer.move(this.layer.x, Math.round(this.pos - lh / 2 + 1));
if (bw.ie)
{
var new_height = parseInt(this.p2.parentNode.offsetHeight, 10) - parseInt(this.p2.style.top, 10) - (bw.ie8 ? 2 : 0);
this.p2.style.height = (new_height > 0 ? new_height : 0) +'px';
}
}
else
{
this.p1.style.width = Math.floor(this.pos - this.p1pos.left - this.layer.width / 2) + 'px';
this.p2.style.left = Math.ceil(this.pos + this.layer.width / 2) + 'px';
this.layer.move(Math.round(this.pos - this.layer.width / 2 + 1), this.layer.y);
if (bw.ie)
this.p2.style.width = parseInt(this.p2.parentNode.offsetWidth, 10) - parseInt(this.p2.style.left, 10) + 'px';
}
};
/**
* Handler for mousedown events
*/
this.onDragStart = function(e)
{
// disable text selection while dragging the splitter
if (window.webkit || bw.safari)
document.body.style.webkitUserSelect = 'none';
this.p1pos = this.relative ? $(this.p1).position() : $(this.p1).offset();
this.p2pos = this.relative ? $(this.p2).position() : $(this.p2).offset();
this.drag_active = true;
// start listening to mousemove events
rcube_event.add_listener({element:document, event:'mousemove', object:this, method:'onDrag'});
rcube_event.add_listener({element:document, event:'mouseup', object:this, method:'onDragStop'});
// need to listen in any iframe documents too, b/c otherwise the splitter stops moving when we move over an iframe
var iframes = document.getElementsByTagName('iframe');
this.iframe_events = Object();
for (var n in iframes)
{
var iframedoc = null;
if (iframes[n].contentDocument)
iframedoc = iframes[n].contentDocument;
else if (iframes[n].contentWindow)
iframedoc = iframes[n].contentWindow.document;
else if (iframes[n].document)
iframedoc = iframes[n].document;
if (iframedoc)
{
// I don't use the add_listener function for this one because I need to create closures to fetch
// the position of each iframe when the event is received
var s = this;
var id = '#'+iframes[n].id;
this.iframe_events[n] = function(e){ e._offset = $(id).offset(); return s.onDrag(e); };
if (iframedoc.addEventListener)
iframedoc.addEventListener('mousemove', this.iframe_events[n], false);
else if (iframes[n].attachEvent)
iframedoc.attachEvent('onmousemove', this.iframe_events[n]);
else
iframedoc.onmousemove = this.iframe_events[n];
rcube_event.add_listener({element:iframedoc, event:'mouseup', object:this, method:'onDragStop'});
}
}
}
/**
* Handler for mousemove events
*/
this.onDrag = function(e)
{
if (!this.drag_active) return false;
var pos = rcube_event.get_mouse_pos(e);
if (this.relative)
{
var parent = $(this.p1.parentNode).offset();
pos.x -= parent.left;
pos.y -= parent.top;
}
if (this.horizontal)
{
if (((pos.y - this.layer.height * 1.5) > this.p1pos.top) && ((pos.y + this.layer.height * 1.5) < (this.p2pos.top + this.p2.offsetHeight)))
{
this.pos = pos.y;
this.resize();
}
}
else
{
if (((pos.x - this.layer.width * 1.5) > this.p1pos.left) && ((pos.x + this.layer.width * 1.5) < (this.p2pos.left + this.p2.offsetWidth)))
{
this.pos = pos.x;
this.resize();
}
}
this.p1pos = this.relative ? $(this.p1).position() : $(this.p1).offset();
this.p2pos = this.relative ? $(this.p2).position() : $(this.p2).offset();
return false;
};
/**
* Handler for mouseup events
*/
this.onDragStop = function(e)
{
// resume the ability to highlight text
if(window.webkit || bw.safari)
document.body.style.webkitUserSelect = 'auto';
// cancel the listening for drag events
rcube_event.remove_listener({element:document, event:'mousemove', object:this, method:'onDrag'});
rcube_event.remove_listener({element:document, event:'mouseup', object:this, method:'onDragStop'});
this.drag_active = false;
var iframes = document.getElementsByTagName('iframe');
for (var n in iframes)
{
var iframedoc;
if (iframes[n].contentDocument)
iframedoc = iframes[n].contentDocument;
else if (iframes[n].contentWindow)
iframedoc = iframes[n].contentWindow.document;
else if (iframes[n].document)
iframedoc = iframes[n].document;
if (iframedoc)
{
if (this.iframe_events[n]) {
if (iframedoc.removeEventListener)
iframedoc.removeEventListener('mousemove', this.iframe_events[n], false);
else if (iframedoc.detachEvent)
iframedoc.detachEvent('onmousemove', this.iframe_events[n]);
else
iframedoc.onmousemove = null;
}
rcube_event.remove_listener({element:iframedoc, event:'mouseup', object:this, method:'onDragStop'});
}
}
this.set_cookie();
return bw.safari ? true : rcube_event.cancel(e);
};
/**
* Handler for window resize events
*/
this.onResize = function(e)
{
if (this.horizontal)
{
var new_height = parseInt(this.p2.parentNode.offsetHeight, 10) - parseInt(this.p2.style.top, 10) - (bw.ie8 ? 2 : 0);
this.p2.style.height = (new_height > 0 ? new_height : 0) +'px';
}
else
this.p2.style.width = parseInt(this.p2.parentNode.offsetWidth, 10) - parseInt(this.p2.style.left, 10) + 'px';
};
this.set_cookie = function()
{
// save state in cookie
var exp = new Date();
exp.setYear(exp.getFullYear() + 1);
bw.set_cookie(this.id, this.pos, exp);
};
} // end class rcube_splitter

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