85 lines
1.9 KiB
Lua
85 lines
1.9 KiB
Lua
local backingList = {}
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local length = 0
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local paginationOffset = 1
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local frame = term.current()
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local drawLine = nil
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local function setTerm(termlike)
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frame = termlike
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end
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local function setDrawLineFunc(drawLineFunc)
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drawLine = drawLineFunc
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end
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local function redrawLine(idx)
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local tw, th = frame.getSize()
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if idx >= paginationOffset and idx-paginationOffset <= th then
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frame.setCursorPos(1, idx-paginationOffset+1)
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frame.setBackgroundColor(colors.red)
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frame.clearLine()
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frame.setBackgroundColor(colors.black)
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if drawLine then
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drawLine(frame, backingList[idx])
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end
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end
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end
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local function itemAt(idx)
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return backingList[idx]
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end
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local function updateItemAt(idx, item)
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backingList[idx] = item
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if idx > length then
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length = idx
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end
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redrawLine(idx)
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end
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local function clearFrom(idx)
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local tw, th = frame.getSize()
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for j = length, idx, -1 do
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backingList[j] = nil
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end
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length = idx
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for y = idx-paginationOffset+1, th, 1 do
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frame.setCursorPos(1, y)
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frame.clearLine()
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end
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end
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local function redraw()
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if drawLine then
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local tw, th = frame.getSize()
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local backingIdx = paginationOffset
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for idx = 1, th, 1 do
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frame.setCursorPos(1, idx)
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if backingList[backingIdx] == nil then
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frame.clearLine()
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else
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drawLine(frame, backingList[backingIdx])
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end
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backingIdx = backingIdx + 1
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end
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end
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end
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local function updatePage(newOffset)
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if newOffset ~= paginationOffset then
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paginationOffset = newOffset
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redraw()
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end
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end
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return {
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setTerm=setTerm,
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setDrawLineFunc=setDrawLineFunc,
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itemAt=itemAt,
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updateItemAt=updateItemAt,
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clearFrom=clearFrom,
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redraw=redraw,
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updatePage=updatePage,
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}
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