54 lines
1.6 KiB
Nim
54 lines
1.6 KiB
Nim
import cligen, terminal
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import common
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proc redraw(lineBuffer:seq[string], topLine:int) =
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eraseScreen(stdout)
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for i in topLine .. topLine + terminalHeight():
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writeLine(stdout, lineBuffer[i])
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let percent = (100 * (topLine / lineBuffer.len)).int
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stdout.styledWrite(fgBlack, bgWhite, "--More--(" & $(percent) & "%)")
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proc main(files:seq[string]) =
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if files.len == 0:
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err "more: bad usage"
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quit 1
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addQuitProc(resetAttributes)
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var lineBuffer:seq[string]
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for file in files:
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for line in lines(file):
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lineBuffer.add(line)
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if lineBuffer.len < terminalHeight():
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for line in lineBuffer:
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writeLine(stdout, line)
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return
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let
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minTopLine = 0
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maxTopLine = lineBuffer.high - terminalHeight()
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var
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command = '\0'
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topLine = minTopLine
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while true:
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redraw(lineBuffer, topLine)
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case getch():
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of 'q':
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break
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of 'j':
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inc topLine
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if topLine > maxTopLine: topLine = maxTopLine
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of 'k':
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dec topLine
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if topLine < minTopLine: topLine = minTopLine
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of 'f':
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topLine += terminalHeight()
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if topLine > maxTopLine: topLine = maxTopLine
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of 'b':
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topLine -= terminalHeight()
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if topLine < minTopLine: topLine = minTopLine
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of 'g':
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topLine = minTopLine
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of 'G':
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topLine = maxTopLine
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else:
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discard
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dispatch(main, version=("version", nimbaseVersion))
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