mirror of
https://github.com/matrix-construct/construct
synced 2024-05-29 00:03:45 +02:00
149 lines
3.7 KiB
JavaScript
149 lines
3.7 KiB
JavaScript
/*
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// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 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. The
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// full license for this software is available in the LICENSE file.
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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, $index)
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{
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if(this.room.control.content.type[event.type] === false)
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return false;
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//if(this.room.timeline.length > this.room.timeline.opts.limit)
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// if($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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/* 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.length - this.room.timeline.opts.limit)
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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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/* Right now before (if ever) the event timeline is split up into groupings
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* of events to provide margins and collapse for a grouping we use this to
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* determine if the event before it is
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*/
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room.events.prototype.is_grouping_start = function(event, $index)
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{
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let prev = this.room.timeline[$index - 1];
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if(!prev)
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return true;
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if(event.type == "m.room.message" && prev.type != event.type)
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return true;
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if(event.type == "m.room.message" && event.sender != prev.sender)
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return true;
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if(event.type != "m.room.message" && prev.type == "m.room.message")
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return true;
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return false;
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};
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room.events.prototype.is_grouping_end = function(event, $index)
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{
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let next = this.room.timeline[$index + 1];
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if(!next)
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return false;
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if(event.type == "m.room.message" && next.type != event.type)
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return true;
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if(event.type == "m.room.message" && next.sender != event.sender)
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return true;
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if(event.type != "m.room.message" && next.type == "m.room.message")
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return true;
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return false;
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};
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