chronos.vim

if !has('python')
    echo "Error: Chronos needs vim compiled with python support."
    finish
endif

python << EOF
import vim
import time
timerDict = {}
statsDict = {}

def getExtension(fileName):
    splits = fileName.rsplit(".", 1)
    if len(splits) < 2:
        return None
    else:
        return splits[1]

class Chronos:
    def startTimer(self):
        curBuf = vim.current.buffer.name
        if not curBuf:
            return
        curTime = time.clock()

        timerDict[curBuf] = curTime

    def stopTimer(self):
        curBuf = vim.current.buffer.name
        if not curBuf:
            return

        curExt = getExtension(curBuf)
        if not curExt:
            return

        curTime = time.clock()
        if curBuf not in timerDict:
            return
        startTime = timerDict[curBuf]

        elapsed = curTime - startTime

        if curExt in statsDict:
            statsDict[curExt] += elapsed
        else:
            statsDict[curExt] = elapsed

chronos = Chronos()
print timerDict.items()

EOF

function! StartTimer()
    py print "Started timer"
    py chronos.startTimer()
endfunction

function! StopTimer()
    py print "Stopped timer"
    py chronos.stopTimer()
endfunction

augroup Chronos
    autocmd!
    autocmd Chronos FocusGained * call StartTimer()
    autocmd Chronos FocusLost * call StopTimer()
augroup END