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, 52 deletions

diff --git a/ui/Label.js b/ui/Label.js
deleted file mode 100644
index f2cd405..0000000
--- a/ui/Label.js
+++ /dev/null
@@ -1,52 +0,0 @@
-const ansi = require('../util/ansi')
-
-const DisplayElement = require('./DisplayElement')
-
-module.exports = class Label extends DisplayElement {
-  // A simple text display. Automatically adjusts size to fit text.
-
-  constructor(text = '') {
-    super()
-
-    this.text = text
-    this.textAttributes = []
-  }
-
-  fixLayout() {
-    this.w = ansi.measureColumns(this.text)
-  }
-
-  drawTo(writable) {
-    if (this.textAttributes.length) {
-      writable.write(ansi.setAttributes(this.textAttributes))
-    }
-
-    this.writeTextTo(writable)
-
-    if (this.textAttributes.length) {
-      writable.write(ansi.resetAttributes())
-    }
-
-    super.drawTo(writable)
-  }
-
-  writeTextTo(writable) {
-    writable.write(ansi.moveCursor(this.absTop, this.absLeft))
-    writable.write(this.text)
-  }
-
-  set text(newText) {
-    const ret = this.setDep('text', newText)
-    this.fixLayout()
-    return ret
-  }
-
-  get text() {
-    return this.getDep('text')
-  }
-
-  // Kinda bad, but works as long as you're overwriting the array instead of
-  // mutating it.
-  set textAttributes(val) { return this.setDep('textAttributes', val) }
-  get textAttributes() { return this.getDep('textAttributes') }
-}