1 files changed, 0 insertions, 121 deletions
diff --git a/ui/form/ScrollBar.js b/ui/form/ScrollBar.js
deleted file mode 100644
index 13ba7fe..0000000
--- a/ui/form/ScrollBar.js
+++ /dev/null
@@ -1,121 +0,0 @@
-const DisplayElement = require('../DisplayElement')
-
-const ansi = require('../../util/ansi')
-const unic = require('../../util/unichars')
-
-module.exports = class ScrollBar extends DisplayElement {
-  constructor({
-    getLayoutType,
-    getCurrentScroll,
-    getMaximumScroll,
-    getTotalItems
-  }) {
-    super()
-
-    this.getLayoutType = getLayoutType
-    this.getCurrentScroll = getCurrentScroll
-    this.getMaximumScroll = getMaximumScroll
-    this.getTotalItems = getTotalItems
-  }
-
-  fixLayout() {
-    // Normally we'd subtract one from contentW/contentH when setting the x/y
-    // position, but the scroll-bar is actually displayed OUTSIDE of (adjacent
-    // to) the parent's content area.
-    if (this.getLayoutType() === 'vertical') {
-      this.h = this.parent.contentH
-      this.w = 1
-      this.x = this.parent.contentW
-      this.y = 0
-    } else {
-      this.h = 1
-      this.w = this.parent.contentW
-      this.x = 0
-      this.y = this.parent.contentH
-    }
-  }
-
-  drawTo(writable) {
-    // Uuuurgh
-    this.fixLayout()
-
-    // TODO: Horizontal layout! Not functionally a lot different, but I'm too
-    // lazy to write a test UI for it right now.
-
-    const {
-      backwards: canScrollBackwards,
-      forwards: canScrollForwards
-    } = this.getScrollableDirections()
-
-    // - 2 for extra UI elements (arrows)
-    const totalLength = this.h - 2
-
-    // ..[-----]..
-    //   ^start|
-    //         ^end
-    //
-    // Start and end should correspond to how much of the scroll area
-    // is currently visible. So, if you can see 60% of the full scroll length
-    // at a time, and you are scrolled 10% down, the start position of the
-    // handle should be 10% down, and it should extend 60% of the scrollbar
-    // length, to the 70% mark.
-
-    // NB: I think this math mixes the units for "items" and "lines".
-    // edgeLength is measured in lines, while totalItems is a number of items.
-    // This isn't a problem when the length of an item is equal to one line,
-    // but it's still worth investigating at some point.
-    const currentScroll = this.getCurrentScroll()
-    const totalItems = this.getTotalItems()
-    const edgeLength = this.parent.contentH
-    const visibleAtOnce = Math.min(totalItems, edgeLength)
-    const handleLength = visibleAtOnce / totalItems * totalLength
-    let handlePosition = Math.floor(totalLength / totalItems * currentScroll)
-
-    // Silly peeve of mine: The handle should only be visibly touching the top
-    // or bottom of the scrollbar area if you're actually scrolled all the way
-    // to the start or end. Otherwise, it shouldn't be touching! There should
-    // visible space indicating that you can scroll in that direction
-    // (in addition to the arrows we show at the ends).
-
-    if (canScrollBackwards && handlePosition === 0) {
-      handlePosition = 1
-    }
-
-    if (canScrollForwards && (handlePosition + handleLength) === edgeLength) {
-      handlePosition--
-    }
-
-    if (this.getLayoutType() === 'vertical') {
-      const start = this.absTop + handlePosition + 1
-      for (let i = 0; i < handleLength; i++) {
-        writable.write(ansi.moveCursor(start + i, this.absLeft))
-        writable.write(unic.BOX_V_DOUBLE)
-      }
-
-      if (canScrollBackwards) {
-        writable.write(ansi.moveCursor(this.absTop, this.absLeft))
-        writable.write(unic.ARROW_UP_DOUBLE)
-      }
-
-      if (canScrollForwards) {
-        writable.write(ansi.moveCursor(this.absBottom, this.absLeft))
-        writable.write(unic.ARROW_DOWN_DOUBLE)
-      }
-    }
-  }
-
-  getScrollableDirections() {
-    const currentScroll = this.getCurrentScroll()
-    const maximumScroll = this.getMaximumScroll()
-
-    return {
-      backwards: (currentScroll > 0),
-      forwards: (currentScroll < maximumScroll)
-    }
-  }
-
-  canScrollAtAll() {
-    const {backwards, forwards} = this.getScrollableDirections()
-    return backwards || forwards
-  }
-}