1 files changed, 135 insertions, 0 deletions
diff --git a/tools/node_modules/eslint/node_modules/inquirer/lib/utils/screen-manager.js b/tools/node_modules/eslint/node_modules/inquirer/lib/utils/screen-manager.js
new file mode 100644
index 0000000000..e5d60fd40a
--- /dev/null
+++ b/tools/node_modules/eslint/node_modules/inquirer/lib/utils/screen-manager.js
@@ -0,0 +1,135 @@
+'use strict';
+var _ = require('lodash');
+var util = require('./readline');
+var cliWidth = require('cli-width');
+var stripAnsi = require('strip-ansi');
+var stringWidth = require('string-width');
+
+function height(content) {
+  return content.split('\n').length;
+}
+
+function lastLine(content) {
+  return _.last(content.split('\n'));
+}
+
+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, bottomContent) {
+  this.rl.output.unmute();
+  this.clean(this.extraLinesUnderPrompt);
+
+  /**
+   * Write message to screen and setPrompt to control backspace
+   */
+
+  var promptLine = lastLine(content);
+  var rawPromptLine = stripAnsi(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 = rawPromptLine;
+  if (this.rl.line.length) {
+    prompt = prompt.slice(0, -this.rl.line.length);
+  }
+  this.rl.setPrompt(prompt);
+
+  // setPrompt will change cursor position, now we can get correct value
+  var cursorPos = this.rl._getCursorPos();
+  var width = this.normalizedCliWidth();
+
+  content = forceLineReturn(content, width);
+  if (bottomContent) {
+    bottomContent = forceLineReturn(bottomContent, width);
+  }
+  // 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.
+  if (rawPromptLine.length % width === 0) {
+    content += '\n';
+  }
+  var fullContent = content + (bottomContent ? '\n' + bottomContent : '');
+  this.rl.output.write(fullContent);
+
+  /**
+   * Re-adjust the cursor at the correct position.
+   */
+
+  // We need to consider parts of the prompt under the cursor as part of the bottom
+  // content in order to correctly cleanup and re-render.
+  var promptLineUpDiff = Math.floor(rawPromptLine.length / width) - cursorPos.rows;
+  var bottomContentHeight = promptLineUpDiff + (bottomContent ? height(bottomContent) : 0);
+  if (bottomContentHeight > 0) {
+    util.up(this.rl, bottomContentHeight);
+  }
+
+  // Reset cursor at the beginning of the line
+  util.left(this.rl, stringWidth(lastLine(fullContent)));
+
+  // Adjust cursor on the right
+  util.right(this.rl, cursorPos.cols);
+
+  /**
+   * Set up state for next re-rendering
+   */
+  this.extraLinesUnderPrompt = bottomContentHeight;
+  this.height = height(fullContent);
+
+  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');
+};
+
+ScreenManager.prototype.releaseCursor = function () {
+  if (this.extraLinesUnderPrompt > 0) {
+    util.down(this.rl, this.extraLinesUnderPrompt);
+  }
+};
+
+ScreenManager.prototype.normalizedCliWidth = function () {
+  var width = cliWidth({
+    defaultWidth: 80,
+    output: this.rl.output
+  });
+  if (process.platform === 'win32') {
+    return width - 1;
+  }
+  return width;
+};
+
+function breakLines(lines, width) {
+  // Break lines who're longuer than the cli width so we can normalize the natural line
+  // returns behavior accross terminals.
+  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 || '';
+  });
+}
+
+function forceLineReturn(content, width) {
+  return _.flatten(breakLines(content.split('\n'), width)).join('\n');
+}