Press n or j to go to the next uncovered block, b, p or k for the previous block.
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* @license Apache-2.0
*
* Copyright (c) 2019 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* eslint-disable no-underscore-dangle */
'use strict';
// MODULES //
var logger = require( 'debug' );
var isPositiveInteger = require( '@stdlib/assert/is-positive-integer' ).isPrimitive;
var format = require( '@stdlib/string/format' );
// VARIABLES //
var debug = logger( 'repl:presentation:command:jump_to' );
// MAIN //
/**
* Returns a callback to be invoked upon calling the `jumpTo` command.
*
* @private
* @param {Presentation} pres - presentation instance
* @returns {Function} callback
*/
function command( pres ) {
return onCommand;
/**
* Jumps to a specified slide.
*
* @private
* @param {PositiveInteger} n - nominal slide number (one-based)
*/
function onCommand( n ) {
var err;
if ( !isPositiveInteger( n ) ) {
err = new TypeError( format( 'invalid argument. Must provide a positive integer. Value: `%s`.', n ) );
debug( 'Error: %s', err.message );
pres._repl._ostream.write( 'Error: '+err.message+'\n' );
return;
}
pres._repl.once( 'drain', onDrain );
/**
* Callback invoked upon a `drain` event.
*
* @private
*/
function onDrain() {
pres.jumpTo( n ).show();
}
}
}
// EXPORTS //
module.exports = command;
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