mirror of
https://github.com/matrix-construct/construct
synced 2024-05-29 00:03:45 +02:00
104 lines
2.3 KiB
JavaScript
104 lines
2.3 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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/**************************************
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* Input history (bash style history)
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*
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* this = room
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*/
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room.input.history = {};
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room.input.history.history = function()
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{
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if(!Array.isArray(this.session.history))
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this.session.history = [];
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return this.session.history;
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};
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/** Add text to the history
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* (use enter() for official user input)
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*/
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room.input.history.add = function(text)
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{
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let history = this.input.history.history();
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history.push(text);
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};
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/** Get text from the history
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*/
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room.input.history.get = function(pos = 0)
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{
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let history = this.input.history.history();
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return history[history.length - pos - 1];
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};
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/** The number of lines in the history
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*/
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room.input.history.len = function()
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{
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let history = this.input.history.history();
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return maybe(() => history.length)? history.length : 0;
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};
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/** Enter text into the history and clear the input
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*/
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room.input.history.enter = function(text)
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{
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this.input.history.add(text);
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this.input.history.pos = undefined;
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this.control.input = "";
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};
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/** Handle an up-arrow event by restoring text from
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* history into the input.
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*/
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room.input.history.up = function(event)
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{
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let pos = this.input.history.pos;
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if(pos === undefined || pos < 0)
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{
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this.input.history.add(this.control.input);
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this.input.history.pos = pos = 1;
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}
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if(pos > this.input.history.len() - 1)
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return;
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this.control.input = this.input.history.get(pos);
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if(pos < this.input.history.len() - 1)
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++this.input.history.pos;
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};
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/** Handle a down-arrow event by restoring text from
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* history into the input.
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*/
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room.input.history.down = function(event)
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{
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let pos = this.input.history.pos;
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if(pos === undefined)
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return;
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if(pos < 0)
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{
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this.input.history.add(this.control.input);
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this.control.input = "";
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}
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else this.control.input = this.input.history.get(pos);
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if(pos >= 0)
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--this.input.history.pos;
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};
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