StackGenVis: Alignment of Data, Algorithms, and Models for Stacking Ensemble Learning Using Performance Metrics https://doi.org/10.1109/TVCG.2020.3030352
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StackGenVis/frontend/node_modules/inquirer2/lib/utils/screen-manager.js

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3.1 KiB

'use strict';
var utils = require('../utils/');
var util = require('./readline');
// Prevent crashes on environments where the width can't be properly detected
utils.cliWidth.defaultWidth = 80;
var ScreenManager = module.exports = function(rl) {
// These variables are keeping information to allow correct prompt re-rendering
this.height = 0;
this.extraLinesUnderPrompt = 0;
this.rl = rl;
};
ScreenManager.prototype.render = function(content, opt) {
opt = utils.extend({
cursor: 0
}, opt || {});
var cursorPos = this.rl._getCursorPos();
this.rl.output.unmute();
this.clean(this.extraLinesUnderPrompt);
/**
* Write message to screen and setPrompt to control backspace
*/
var lines = content.split(/\n/);
var promptLine = lines[lines.length - 1 - opt.cursor];
var rawPromptLine = utils.stripColor(promptLine);
// Remove the rl.line from our prompt. We can't rely on the content of
// rl.line (mainly because of the password prompt), so just rely on it's
// length.
var prompt = promptLine;
if (this.rl.line.length) {
prompt = prompt.slice(0, -this.rl.line.length);
}
this.rl.setPrompt(prompt);
var rawPrompt = utils.stripColor(prompt);
// Manually insert an extra line if we're at the end of the line.
// This prevent the cursor from appearing at the beginning of the
// current line.
var breakedLines = breakLines(lines);
var actualLines = utils.flatten(breakedLines);
if (rawPromptLine.length % utils.cliWidth() === 0) {
actualLines.push('');
}
this.rl.output.write(actualLines.join('\n'));
/**
* Re-adjust the cursor at the correct position.
*/
var promptLineUpDiff = Math.floor(rawPromptLine.length / utils.cliWidth()) - cursorPos.rows;
if (opt.cursor + promptLineUpDiff > 0) {
util.up(this.rl, opt.cursor + promptLineUpDiff);
}
// Reset cursor at the beginning of the line
var last = actualLines[actualLines.length - 1];
util.left(this.rl, utils.stripColor(last).length);
// Adjust cursor on the right
var rightPos = cursorPos.cols;
if (cursorPos.rows === 0) {
rightPos = Math.max(rightPos, rawPrompt.length);
}
util.right(this.rl, rightPos);
/**
* Set up state for next re-rendering
*/
var bottomSection = breakedLines.slice(breakedLines.length - opt.cursor - promptLineUpDiff);
this.extraLinesUnderPrompt = utils.flatten(bottomSection).length;
this.height = actualLines.length;
this.rl.output.mute();
};
ScreenManager.prototype.clean = function(extraLines) {
if (extraLines > 0) {
util.down(this.rl, extraLines);
}
util.clearLine(this.rl, this.height);
};
ScreenManager.prototype.done = function() {
this.rl.setPrompt('');
this.rl.output.unmute();
this.rl.output.write('\n');
};
function breakLines(lines) {
// Break lines who're longuer than the cli width so we can normalize the natural line
// returns behavior accross terminals.
var width = utils.cliWidth();
var regex = new RegExp(
'(?:(?:\\033\[[0-9;]*m)*.?){1,' + width + '}',
'g'
);
return lines.map(function(line) {
var chunk = line.match(regex);
// last match is always empty
chunk.pop();
return chunk || '';
});
}