mirror of
https://github.com/matrix-construct/construct
synced 2024-11-04 21:08:57 +01:00
115 lines
3.2 KiB
JavaScript
115 lines
3.2 KiB
JavaScript
/*
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* IRCd Charybdis 5/Matrix
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*
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* Copyright (C) 2017 Charybdis Development Team
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* Copyright (C) 2017 Jason Volk (jason@zemos.net)
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice is present in all copies.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* 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 THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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'use strict';
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room.prototype.current_event = function(minus = 0)
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{
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return this.timeline[this.timeline.length - 1 - minus];
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};
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room.prototype.current_event_id = function(minus = 0)
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{
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return this.current_event(minus).event_id;
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};
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room.events = class extends mc.ng.controller
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{
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constructor($scope)
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{
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super("room.events", $scope);
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this.room = this.$scope.room;
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if(!this.room.scroll.initial_backfill)
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this.room.scroll.initial_backfill = this.initial_backfill();
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}
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};
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mc.ng.app.controller('room.events', room.events);
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room.events.prototype.destructor = function()
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{
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let room = this.room;
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// save scroll pos
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room.scroll.last = room.scroll.at();
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};
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room.events.prototype.constructed = async function()
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{
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await this.room.scroll.initial_backfill;
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// restore saved scroll pos
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if(this.room.scroll.last !== undefined)
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this.room.scroll.to(this.room.scroll.last);
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else
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this.room.scroll.to.bottom();
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// register scroll event (TODO: directive??)
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this.room.receipt.send.current();
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};
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room.events.prototype.initial_backfill = async function()
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{
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let limit = this.room.timeline.opts.limit;
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let count = Math.min(128, limit); try
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{
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await this.room.scroll.back(count);
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}
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catch(error)
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{
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console.error("Initial backfill error: " + error);
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}
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};
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/* Result of this determines the ng-if of the event in the view,
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* i.e if false, this event has no DOM element.
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*/
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room.events.prototype.can_render = function(event, $index)
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{
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if(this.room.control.content.type[event.type] === false)
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return false;
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return true;
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};
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/* Result of this determines if this event is visible in the view.
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* The default behavior is to hide the accumulated state events below
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* the event horizon.
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*/
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room.events.prototype.can_show = function(event, $index)
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{
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// Force showing a specific event by ID using this condition
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if(this.room.control.content.event_id[event.event_id] === true)
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return true;
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// Force hiding a specific event by ID using this condition
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if(this.room.control.content.event_id[event.event_id] === false)
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return false;
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if($index < this.room.timeline.horizon)
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return false;
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return true;
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};
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