mirror of
https://github.com/matrix-construct/construct
synced 2024-07-08 03:28:40 +02:00
120 lines
3.1 KiB
JavaScript
120 lines
3.1 KiB
JavaScript
/*
|
|
* IRCd Charybdis 5/Matrix
|
|
*
|
|
* Copyright (C) 2017 Charybdis Development Team
|
|
* Copyright (C) 2017 Jason Volk (jason@zemos.net)
|
|
*
|
|
* Permission to use, copy, modify, and/or distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice is present in all copies.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
|
|
*
|
|
*/
|
|
|
|
'use strict';
|
|
|
|
/**************************************
|
|
* Scrolling & Viewport utils
|
|
*
|
|
*/
|
|
|
|
mc.scroll = {};
|
|
|
|
mc.scroll.at = function(e)
|
|
{
|
|
return $(e).prop("scrollTop");
|
|
};
|
|
|
|
mc.scroll.at.top = function(e)
|
|
{
|
|
return mc.scroll.at(e) == 0;
|
|
};
|
|
|
|
mc.scroll.at.bottom = function(e)
|
|
{
|
|
let st = $(e).prop("scrollTop");
|
|
let sh = $(e).prop("scrollHeight");
|
|
let ch = $(e).prop("clientHeight");
|
|
return sh - ch <= st + 1;
|
|
};
|
|
|
|
mc.scroll.to = function(e, pos, speed = "slow")
|
|
{
|
|
return $(e).animate({ scrollTop: pos }, speed);
|
|
};
|
|
|
|
mc.scroll.to.top = function(e, speed = "slow")
|
|
{
|
|
return mc.scroll.to(e, 0, speed);
|
|
};
|
|
|
|
mc.scroll.to.bottom = function(e, speed = "slow")
|
|
{
|
|
return mc.scroll.to(e, $(e).prop("scrollHeight"), speed);
|
|
};
|
|
|
|
/**
|
|
* top: the percentage of area invisible above the viewport.
|
|
* view: the percentage of the area in the viewport.
|
|
* bottom: the percentage of the area invisible below the viewport.
|
|
*/
|
|
mc.scroll.pct = function(e)
|
|
{
|
|
let st = $(e).prop("scrollTop");
|
|
let sh = $(e).prop("scrollHeight");
|
|
let ch = $(e).prop("clientHeight");
|
|
return {
|
|
top: st / sh,
|
|
view: ch / sh,
|
|
bottom: (sh - (st + ch)) / sh,
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Given a DOM element, this function tests if the user can see the element,
|
|
* (and for now it returns true only if the *whole* element is in the viewport).
|
|
* Originally intended to figure out which events in the Matrix room timeline have
|
|
* fallen into the scrollback and can be removed.
|
|
*/
|
|
function isElementInViewport(e)
|
|
{
|
|
if(typeof jQuery === "function" && e instanceof jQuery)
|
|
e = e[0];
|
|
|
|
let rect = e.getBoundingClientRect();
|
|
return (
|
|
rect.top >= 0 &&
|
|
rect.left >= 0 &&
|
|
rect.bottom <= (window.innerHeight || document.documentElement.clientHeight) &&
|
|
rect.right <= (window.innerWidth || document.documentElement.clientWidth)
|
|
);
|
|
}
|
|
|
|
mc.get_rect = function(e)
|
|
{
|
|
if(typeof jQuery === "function" && e instanceof jQuery)
|
|
e = e[0];
|
|
|
|
if(e === undefined)
|
|
return undefined;
|
|
|
|
let rect = e.getBoundingClientRect();
|
|
return {
|
|
top: rect.top,
|
|
right: rect.right,
|
|
bottom: rect.bottom,
|
|
left: rect.left,
|
|
};
|
|
};
|