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173
my-app/node_modules/inquirer/lib/utils/screen-manager.js
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173
my-app/node_modules/inquirer/lib/utils/screen-manager.js
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import cliWidth from 'cli-width';
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import wrapAnsi from 'wrap-ansi';
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import stripAnsi from 'strip-ansi';
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import stringWidth from 'string-width';
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import ora from 'ora';
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import * as util from './readline.js';
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function height(content) {
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return content.split('\n').length;
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}
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/** @param {string} content */
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function lastLine(content) {
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return content.split('\n').pop();
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}
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export default class ScreenManager {
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constructor(rl) {
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// These variables are keeping information to allow correct prompt re-rendering
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this.height = 0;
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this.extraLinesUnderPrompt = 0;
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this.rl = rl;
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}
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renderWithSpinner(content, bottomContent) {
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if (this.spinnerId) {
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clearInterval(this.spinnerId);
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}
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let spinner;
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let contentFunc;
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let bottomContentFunc;
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if (bottomContent) {
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spinner = ora(bottomContent);
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contentFunc = () => content;
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bottomContentFunc = () => spinner.frame();
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} else {
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spinner = ora(content);
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contentFunc = () => spinner.frame();
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bottomContentFunc = () => '';
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}
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this.spinnerId = setInterval(
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() => this.render(contentFunc(), bottomContentFunc(), true),
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spinner.interval,
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);
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}
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render(content, bottomContent, spinning = false) {
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if (this.spinnerId && !spinning) {
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clearInterval(this.spinnerId);
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}
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this.rl.output.unmute();
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this.clean(this.extraLinesUnderPrompt);
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/**
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* Write message to screen and setPrompt to control backspace
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*/
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const promptLine = lastLine(content);
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const rawPromptLine = stripAnsi(promptLine);
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// Remove the rl.line from our prompt. We can't rely on the content of
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// rl.line (mainly because of the password prompt), so just rely on it's
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// length.
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let prompt = rawPromptLine;
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if (this.rl.line.length) {
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prompt = prompt.slice(0, -this.rl.line.length);
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}
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this.rl.setPrompt(prompt);
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// SetPrompt will change cursor position, now we can get correct value
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const cursorPos = this.rl._getCursorPos();
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const width = this.normalizedCliWidth();
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content = this.forceLineReturn(content, width);
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if (bottomContent) {
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bottomContent = this.forceLineReturn(bottomContent, width);
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}
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// Manually insert an extra line if we're at the end of the line.
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// This prevent the cursor from appearing at the beginning of the
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// current line.
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if (rawPromptLine.length % width === 0) {
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content += '\n';
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}
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const fullContent = content + (bottomContent ? '\n' + bottomContent : '');
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this.rl.output.write(fullContent);
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/**
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* Re-adjust the cursor at the correct position.
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*/
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// We need to consider parts of the prompt under the cursor as part of the bottom
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// content in order to correctly cleanup and re-render.
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const promptLineUpDiff = Math.floor(rawPromptLine.length / width) - cursorPos.rows;
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const bottomContentHeight =
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promptLineUpDiff + (bottomContent ? height(bottomContent) : 0);
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if (bottomContentHeight > 0) {
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util.up(this.rl, bottomContentHeight);
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}
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// Reset cursor at the beginning of the line
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util.left(this.rl, stringWidth(lastLine(fullContent)));
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// Adjust cursor on the right
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if (cursorPos.cols > 0) {
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util.right(this.rl, cursorPos.cols);
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}
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/**
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* Set up state for next re-rendering
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*/
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this.extraLinesUnderPrompt = bottomContentHeight;
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this.height = height(fullContent);
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this.rl.output.mute();
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}
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clean(extraLines) {
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if (extraLines > 0) {
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util.down(this.rl, extraLines);
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}
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util.clearLine(this.rl, this.height);
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}
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done() {
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this.rl.setPrompt('');
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this.rl.output.unmute();
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this.rl.output.write('\n');
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}
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releaseCursor() {
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if (this.extraLinesUnderPrompt > 0) {
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util.down(this.rl, this.extraLinesUnderPrompt);
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}
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}
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normalizedCliWidth() {
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const width = cliWidth({
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defaultWidth: 80,
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output: this.rl.output,
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});
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return width;
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}
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/**
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* @param {string[]} lines
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*/
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breakLines(lines, width = this.normalizedCliWidth()) {
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// Break lines who're longer than the cli width so we can normalize the natural line
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// returns behavior across terminals.
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// re: trim: false; by default, `wrap-ansi` trims whitespace, which
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// is not what we want.
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// re: hard: true; by default', `wrap-ansi` does soft wrapping
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return lines.map((line) =>
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wrapAnsi(line, width, { trim: false, hard: true }).split('\n'),
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);
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}
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/**
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* @param {string} content
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*/
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forceLineReturn(content, width = this.normalizedCliWidth()) {
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return this.breakLines(content.split('\n'), width).flat().join('\n');
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}
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}
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