use ESM module syntax & minor cleanups

The biggest change here is moving various element classes under
more scope-specific directories, which helps to avoid circular
dependencies and is just cleaner to navigate and expand in the
future.

Otherwise this is a largely uncritical port to ESM module syntax!
There are probably a number of changes and other cleanups that
remain much needed.

Whenever I make changes to tui-lib it's hard to believe it's
already been <INSERT COUNTING NUMBER HERE> years since the
previous time. First commits are from January 2017, and the
code originates a month earlier in KAaRMNoD!

1 files changed, 0 insertions, 91 deletions

diff --git a/util/CommandLineInterfacer.js b/util/CommandLineInterfacer.js
deleted file mode 100644
index d2007fb..0000000
--- a/util/CommandLineInterfacer.js
+++ /dev/null
@@ -1,91 +0,0 @@
-const EventEmitter = require('events')
-const waitForData = require('./waitForData')
-const ansi = require('./ansi')
-
-module.exports = class CommandLineInterfacer extends EventEmitter {
-  constructor(inStream = process.stdin, outStream = process.stdout, proc = process) {
-    super()
-
-    this.inStream = inStream
-    this.outStream = outStream
-    this.process = proc
-
-    inStream.on('data', buffer => {
-      this.emit('inputData', buffer)
-    })
-
-    inStream.setRawMode(true)
-
-    proc.on('SIGWINCH', async buffer => {
-      this.emit('resize', await this.getScreenSize())
-    })
-  }
-
-  async getScreenSize() {
-    const waitUntil = cond => waitForData(this.inStream, cond)
-
-    // Get old cursor position..
-    this.outStream.write(ansi.requestCursorPosition())
-    const { options: oldCoords } = this.parseANSICommand(
-      await waitUntil(buf => ansi.isANSICommand(buf, 82))
-    )
-
-    // Move far to the bottom right of the screen, then get cursor position..
-    // (We could use moveCursor here, but the 0-index offset isn't really
-    // relevant.)
-    this.outStream.write(ansi.moveCursorRaw(9999, 9999))
-    this.outStream.write(ansi.requestCursorPosition())
-    const { options: sizeCoords } = this.parseANSICommand(
-      await waitUntil(buf => ansi.isANSICommand(buf, 82))
-    )
-
-    // Restore to old cursor position.. (Using moveCursorRaw is actaully
-    // necessary here, since we'll be passing the coordinates returned from
-    // another ANSI command.)
-    this.outStream.write(ansi.moveCursorRaw(oldCoords[0], oldCoords[1]))
-
-    // And return dimensions.
-    const [ sizeLine, sizeCol ] = sizeCoords
-    return {
-      lines: sizeLine, cols: sizeCol,
-      width: sizeCol, height: sizeLine
-    }
-  }
-
-  parseANSICommand(buffer) {
-    // Typically ANSI commands are written ESC[1;2;3;4C
-    // ..where ESC is the ANSI escape code, equal to hexadecimal 1B and
-    //   decimal 33
-    // ..where [ and ; are the literal strings "[" and ";"
-    // ..where 1, 2, 3, and 4 are decimal integer arguments written in ASCII
-    //   that may last more than one byte (e.g. "15")
-    // ..where C is some number representing the code of the command
-
-    if (buffer[0] !== 0x1b || buffer[1] !== 0x5b) {
-      throw new Error('Not an ANSI command')
-    }
-
-    const options = []
-    let curOption = ''
-    let commandCode = null
-    for (const val of buffer.slice(2)) {
-      if (48 <= val && val <= 57) { // 0124356789
-        curOption = curOption.concat(val - 48)
-      } else {
-        options.push(parseInt(curOption))
-        curOption = ''
-
-        if (val !== 59) { // ;
-          commandCode = val
-          break
-        }
-      }
-    }
-
-    return {code: commandCode, options: options}
-  }
-
-  write(data) {
-    this.outStream.write(data)
-  }
-}