84 lines
1.8 KiB
JavaScript
84 lines
1.8 KiB
JavaScript
/**
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* log.js - log element for blessed
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* Copyright (c) 2013-2015, Christopher Jeffrey and contributors (MIT License).
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* https://github.com/chjj/blessed
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*/
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/**
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* Modules
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*/
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var util = require('util');
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var nextTick = global.setImmediate || process.nextTick.bind(process);
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var Node = require('./node');
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var ScrollableText = require('./scrollabletext');
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/**
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* Log
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*/
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function Log(options) {
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var self = this;
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if (!(this instanceof Node)) {
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return new Log(options);
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}
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options = options || {};
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ScrollableText.call(this, options);
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this.scrollback = options.scrollback != null
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? options.scrollback
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: Infinity;
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this.scrollOnInput = options.scrollOnInput;
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this.on('set content', function() {
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if (!self._userScrolled || self.scrollOnInput) {
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nextTick(function() {
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self.setScrollPerc(100);
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self._userScrolled = false;
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self.screen.render();
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});
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}
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});
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}
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Log.prototype.__proto__ = ScrollableText.prototype;
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Log.prototype.type = 'log';
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Log.prototype.log =
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Log.prototype.add = function() {
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var args = Array.prototype.slice.call(arguments);
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if (typeof args[0] === 'object') {
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args[0] = util.inspect(args[0], true, 20, true);
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}
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var text = util.format.apply(util, args);
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this.emit('log', text);
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var ret = this.pushLine(text);
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if (this._clines.fake.length > this.scrollback) {
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this.shiftLine(0, (this.scrollback / 3) | 0);
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}
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return ret;
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};
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Log.prototype._scroll = Log.prototype.scroll;
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Log.prototype.scroll = function(offset, always) {
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if (offset === 0) return this._scroll(offset, always);
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this._userScrolled = true;
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var ret = this._scroll(offset, always);
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if (this.getScrollPerc() === 100) {
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this._userScrolled = false;
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}
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return ret;
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};
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/**
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* Expose
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*/
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module.exports = Log;
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