scripts/last-dotplot
author Martin C. Frith
Thu Dec 21 16:22:52 2017 +0900 (2017-12-21)
changeset 915 6079fabb49a5
parent 914 f4ca19d126e3
child 916 ffe68ba3d865
permissions -rwxr-xr-x
Refactor last-dotplot
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#! /usr/bin/env python
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# Read pair-wise alignments in MAF or LAST tabular format: write an
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# "Oxford grid", a.k.a. dotplot.
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# TODO: Currently, pixels with zero aligned nt-pairs are white, and
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# pixels with one or more aligned nt-pairs are black.  This can look
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# too crowded for large genome alignments.  I tried shading each pixel
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# according to the number of aligned nt-pairs within it, but the
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# result is too faint.  How can this be done better?
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import functools
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import gzip
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from fnmatch import fnmatchcase
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from operator import itemgetter
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import subprocess
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import itertools, optparse, os, re, sys
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# Try to make PIL/PILLOW work:
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try: from PIL import Image, ImageDraw, ImageFont, ImageColor
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except ImportError: import Image, ImageDraw, ImageFont, ImageColor
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def myOpen(fileName):  # faster than fileinput
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    if fileName is None:
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        return []
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    if fileName == "-":
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        return sys.stdin
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    if fileName.endswith(".gz"):
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        return gzip.open(fileName)
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    return open(fileName)
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def warn(message):
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    if opts.verbose:
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        prog = os.path.basename(sys.argv[0])
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        sys.stderr.write(prog + ": " + message + "\n")
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def groupByFirstItem(things):
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    for k, v in itertools.groupby(things, itemgetter(0)):
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        yield k, [i[1:] for i in v]
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def croppedBlocks(blocks, ranges1, ranges2):
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    headBeg1, headBeg2, headSize = blocks[0]
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    for r1 in ranges1:
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        for r2 in ranges2:
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            cropBeg1, cropEnd1 = r1
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            if headBeg1 < 0:
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                cropBeg1, cropEnd1 = -cropEnd1, -cropBeg1
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            cropBeg2, cropEnd2 = r2
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            if headBeg2 < 0:
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                cropBeg2, cropEnd2 = -cropEnd2, -cropBeg2
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            for beg1, beg2, size in blocks:
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                b1 = max(cropBeg1, beg1)
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                e1 = min(cropEnd1, beg1 + size)
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                if b1 >= e1: continue
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                offset = beg2 - beg1
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                b2 = max(cropBeg2, b1 + offset)
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                e2 = min(cropEnd2, e1 + offset)
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                if b2 >= e2: continue
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                yield b2 - offset, b2, e2 - b2
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def tabBlocks(beg1, beg2, blocks):
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    '''Get the gapless blocks of an alignment, from LAST tabular format.'''
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    for i in blocks.split(","):
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        if ":" in i:
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            x, y = i.split(":")
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            beg1 += int(x)
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            beg2 += int(y)
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        else:
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            size = int(i)
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            yield beg1, beg2, size
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            beg1 += size
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            beg2 += size
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def mafBlocks(beg1, beg2, seq1, seq2):
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    '''Get the gapless blocks of an alignment, from MAF format.'''
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    size = 0
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    for x, y in itertools.izip(seq1, seq2):
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        if x == "-":
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            if size:
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                yield beg1, beg2, size
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                beg1 += size
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                beg2 += size
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                size = 0
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            beg2 += 1
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        elif y == "-":
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            if size:
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                yield beg1, beg2, size
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                beg1 += size
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                beg2 += size
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                size = 0
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            beg1 += 1
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        else:
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            size += 1
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    if size: yield beg1, beg2, size
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def alignmentInput(lines):
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    '''Get alignments and sequence lengths, from MAF or tabular format.'''
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    mafCount = 0
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    for line in lines:
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        w = line.split()
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        if line[0].isdigit():  # tabular format
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            chr1, beg1, seqlen1 = w[1], int(w[2]), int(w[5])
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            if w[4] == "-": beg1 -= seqlen1
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            chr2, beg2, seqlen2 = w[6], int(w[7]), int(w[10])
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            if w[9] == "-": beg2 -= seqlen2
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            blocks = tabBlocks(beg1, beg2, w[11])
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            yield chr1, seqlen1, chr2, seqlen2, blocks
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        elif line[0] == "s":  # MAF format
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            if mafCount == 0:
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                chr1, beg1, seqlen1, seq1 = w[1], int(w[2]), int(w[5]), w[6]
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                if w[4] == "-": beg1 -= seqlen1
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                mafCount = 1
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            else:
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                chr2, beg2, seqlen2, seq2 = w[1], int(w[2]), int(w[5]), w[6]
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                if w[4] == "-": beg2 -= seqlen2
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                blocks = mafBlocks(beg1, beg2, seq1, seq2)
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                yield chr1, seqlen1, chr2, seqlen2, blocks
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                mafCount = 0
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def seqRequestFromText(text):
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    if ":" in text:
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        pattern, interval = text.rsplit(":", 1)
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        if "-" in interval:
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            beg, end = interval.rsplit("-", 1)
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            return pattern, int(beg), int(end)  # beg may be negative
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    return text, 0, sys.maxsize
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def rangesFromSeqName(seqRequests, name, seqLen):
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    if seqRequests:
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        base = name.split(".")[-1]  # allow for names like hg19.chr7
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        for pat, beg, end in seqRequests:
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            if fnmatchcase(name, pat) or fnmatchcase(base, pat):
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                yield max(beg, 0), min(end, seqLen)
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    else:
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        yield 0, seqLen
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def updateSeqs(coverDict, seqRanges, seqName, ranges, coveredRange):
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    beg, end = coveredRange
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    if beg < 0:
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        coveredRange = -end, -beg
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    if seqName in coverDict:
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        coverDict[seqName].append(coveredRange)
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    else:
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        coverDict[seqName] = [coveredRange]
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        for beg, end in ranges:
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            r = seqName, beg, end
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            seqRanges.append(r)
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def readAlignments(fileName, opts):
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    '''Get alignments and sequence limits, from MAF or tabular format.'''
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    seqRequests1 = map(seqRequestFromText, opts.seq1)
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    seqRequests2 = map(seqRequestFromText, opts.seq2)
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    alignments = []
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    seqRanges1 = []
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    seqRanges2 = []
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    coverDict1 = {}
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    coverDict2 = {}
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    lines = myOpen(fileName)
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    for seqName1, seqLen1, seqName2, seqLen2, blocks in alignmentInput(lines):
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        ranges1 = sorted(rangesFromSeqName(seqRequests1, seqName1, seqLen1))
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        if not ranges1: continue
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        ranges2 = sorted(rangesFromSeqName(seqRequests2, seqName2, seqLen2))
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        if not ranges2: continue
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        b = list(croppedBlocks(list(blocks), ranges1, ranges2))
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        if not b: continue
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        aln = seqName1, seqName2, b
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        alignments.append(aln)
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        coveredRange1 = b[0][0], b[-1][0] + b[-1][2]
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        updateSeqs(coverDict1, seqRanges1, seqName1, ranges1, coveredRange1)
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        coveredRange2 = b[0][1], b[-1][1] + b[-1][2]
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        updateSeqs(coverDict2, seqRanges2, seqName2, ranges2, coveredRange2)
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    return alignments, seqRanges1, coverDict1, seqRanges2, coverDict2
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def nameAndRangesFromDict(cropDict, seqName):
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    if seqName in cropDict:
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        return seqName, cropDict[seqName]
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    n = seqName.split(".")[-1]
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    if n in cropDict:
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        return n, cropDict[n]
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    return seqName, []
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def rangesForSecondaryAlignments(primaryRanges, seqLen):
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    if primaryRanges:
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        return primaryRanges
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    return [(0, seqLen)]
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def readSecondaryAlignments(opts, cropRanges1, cropRanges2):
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    cropDict1 = dict(groupByFirstItem(cropRanges1))
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    cropDict2 = dict(groupByFirstItem(cropRanges2))
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    alignments = []
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    seqRanges1 = []
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    seqRanges2 = []
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    coverDict1 = {}
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    coverDict2 = {}
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    lines = myOpen(opts.alignments)
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    for seqName1, seqLen1, seqName2, seqLen2, blocks in alignmentInput(lines):
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        seqName1, ranges1 = nameAndRangesFromDict(cropDict1, seqName1)
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        seqName2, ranges2 = nameAndRangesFromDict(cropDict2, seqName2)
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        if not ranges1 and not ranges2:
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            continue
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        r1 = rangesForSecondaryAlignments(ranges1, seqLen1)
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        r2 = rangesForSecondaryAlignments(ranges2, seqLen2)
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        b = list(croppedBlocks(list(blocks), r1, r2))
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        if not b: continue
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        aln = seqName1, seqName2, b
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        alignments.append(aln)
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        if not ranges1:
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            coveredRange1 = b[0][0], b[-1][0] + b[-1][2]
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            updateSeqs(coverDict1, seqRanges1, seqName1, r1, coveredRange1)
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        if not ranges2:
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            coveredRange2 = b[0][1], b[-1][1] + b[-1][2]
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            updateSeqs(coverDict2, seqRanges2, seqName2, r2, coveredRange2)
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    return alignments, seqRanges1, coverDict1, seqRanges2, coverDict2
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def twoValuesFromOption(text, separator):
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    if separator in text:
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        return text.split(separator)
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    return text, text
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def mergedRanges(ranges):
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    oldBeg, maxEnd = ranges[0]
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    for beg, end in ranges:
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        if beg > maxEnd:
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            yield oldBeg, maxEnd
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            oldBeg = beg
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            maxEnd = end
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        elif end > maxEnd:
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            maxEnd = end
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    yield oldBeg, maxEnd
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def mergedRangesPerSeq(coverDict):
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    for k, v in coverDict.iteritems():
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        v.sort()
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        yield k, list(mergedRanges(v))
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def coveredLength(mergedCoverDict):
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    return sum(sum(e - b for b, e in v) for v in mergedCoverDict.itervalues())
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def trimmed(seqRanges, coverDict, minAlignedBases, maxGapFrac, endPad, midPad):
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    maxEndGapFrac, maxMidGapFrac = twoValuesFromOption(maxGapFrac, ",")
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    maxEndGap = max(float(maxEndGapFrac) * minAlignedBases, endPad * 1.0)
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    maxMidGap = max(float(maxMidGapFrac) * minAlignedBases, midPad * 2.0)
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    for seqName, rangeBeg, rangeEnd in seqRanges:
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        seqBlocks = coverDict[seqName]
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        blocks = [i for i in seqBlocks if i[0] < rangeEnd and i[1] > rangeBeg]
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        if blocks[0][0] - rangeBeg > maxEndGap:
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            rangeBeg = blocks[0][0] - endPad
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        for j, y in enumerate(blocks):
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            if j:
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                x = blocks[j - 1]
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                if y[0] - x[1] > maxMidGap:
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                    yield seqName, rangeBeg, x[1] + midPad
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                    rangeBeg = y[0] - midPad
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        if rangeEnd - blocks[-1][1] > maxEndGap:
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            rangeEnd = blocks[-1][1] + endPad
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        yield seqName, rangeBeg, rangeEnd
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def natural_sort_key(my_string):
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    '''Return a sort key for "natural" ordering, e.g. chr9 < chr10.'''
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    parts = re.split(r'(\d+)', my_string)
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    parts[1::2] = map(int, parts[1::2])
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    return parts
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def nameKey(oneSeqRanges):
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    return natural_sort_key(oneSeqRanges[0][0])
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def sizeKey(oneSeqRanges):
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    return sum(b - e for n, b, e in oneSeqRanges), nameKey(oneSeqRanges)
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def alignmentKey(seqNamesToLists, oneSeqRanges):
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    seqName = oneSeqRanges[0][0]
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    alignmentsOfThisSequence = seqNamesToLists[seqName]
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    numOfAlignedLetterPairs = sum(i[3] for i in alignmentsOfThisSequence)
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    toMiddle = numOfAlignedLetterPairs // 2
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    for i in alignmentsOfThisSequence:
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        toMiddle -= i[3]
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        if toMiddle < 0:
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            return i[1:3]  # sequence-rank and "position" of this alignment
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def alignmentSortData(alignments, seqIndex, otherNamesToRanks):
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    otherIndex = 1 - seqIndex
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    for i in alignments:
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        blocks = i[2]
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        otherRank = otherNamesToRanks[i[otherIndex]]
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        otherPos = abs(blocks[0][otherIndex] +
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                       blocks[-1][otherIndex] + blocks[-1][2])
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        numOfAlignedLetterPairs = sum(i[2] for i in blocks)
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        yield i[seqIndex], otherRank, otherPos, numOfAlignedLetterPairs
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def mySortedRanges(seqRanges, sortOpt, seqIndex, alignments, otherRanges):
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    rangesGroupedBySeqName = itertools.groupby(seqRanges, itemgetter(0))
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    g = [list(ranges) for seqName, ranges in rangesGroupedBySeqName]
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    if sortOpt == "1":
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        g.sort(key=nameKey)
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    if sortOpt == "2":
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        g.sort(key=sizeKey)
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    if sortOpt == "3":
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        otherNameGroups = itertools.groupby(i[0] for i in otherRanges)
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        ranksAndNames = enumerate(i[0] for i in otherNameGroups)
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        otherNamesToRanks = dict((n, r) for r, n in ranksAndNames)
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        alns = sorted(alignmentSortData(alignments, seqIndex,
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                                        otherNamesToRanks))
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        alnsGroupedBySeqName = itertools.groupby(alns, itemgetter(0))
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        seqNamesToLists = dict((k, list(v)) for k, v in alnsGroupedBySeqName)
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        g.sort(key=functools.partial(alignmentKey, seqNamesToLists))
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    return [j for i in g for j in i]
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def allSortedRanges(opts, alignments, alignmentsB,
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                    seqRanges1, seqRangesB1, seqRanges2, seqRangesB2):
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    o1, oB1 = twoValuesFromOption(opts.sort1, ":")
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    o2, oB2 = twoValuesFromOption(opts.sort2, ":")
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    if o1 == "3" and o2 == "3":
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        raise Exception("the sort options have circular dependency")
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    if o1 != "3":
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        s1 = mySortedRanges(seqRanges1, o1, None, None, None)
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    if o2 != "3":
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        s2 = mySortedRanges(seqRanges2, o2, None, None, None)
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    if o1 == "3":
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        s1 = mySortedRanges(seqRanges1, o1, 0, alignments, s2)
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    if o2 == "3":
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        s2 = mySortedRanges(seqRanges2, o2, 1, alignments, s1)
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    t1 = mySortedRanges(seqRangesB1, oB1, 0, alignmentsB, s2)
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    t2 = mySortedRanges(seqRangesB2, oB2, 1, alignmentsB, s1)
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    return s1 + t1, s2 + t2
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def prettyNum(n):
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    t = str(n)
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    groups = []
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    while t:
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        groups.append(t[-3:])
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        t = t[:-3]
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    return ",".join(reversed(groups))
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def sizeText(size):
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    suffixes = "bp", "kb", "Mb", "Gb"
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    for i, x in enumerate(suffixes):
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        j = 10 ** (i * 3)
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        if size < j * 10:
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            return "%.2g" % (1.0 * size / j) + x
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        if size < j * 1000 or i == len(suffixes) - 1:
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            return "%.0f" % (1.0 * size / j) + x
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def labelText(seqRange, labelOpt):
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    seqName, beg, end = seqRange
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    if labelOpt == 1:
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        return seqName + ": " + sizeText(end - beg)
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    if labelOpt == 2:
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        return seqName + ":" + prettyNum(beg) + ": " + sizeText(end - beg)
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    if labelOpt == 3:
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        return seqName + ":" + prettyNum(beg) + "-" + prettyNum(end)
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    return seqName
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def rangeLabels(seqRanges, labelOpt, font, fontsize, image_mode, textRot):
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    if fontsize:
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        image_size = 1, 1
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        im = Image.new(image_mode, image_size)
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        draw = ImageDraw.Draw(im)
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   361
    x = y = 0
Martin@899
   362
    for r in seqRanges:
Martin@899
   363
        text = labelText(r, labelOpt)
Martin@899
   364
        if fontsize:
Martin@899
   365
            x, y = draw.textsize(text, font=font)
Martin@899
   366
            if textRot:
Martin@899
   367
                x, y = y, x
Martin@899
   368
        yield text, x, y
Martin@899
   369
Martin@914
   370
def dataFromRanges(sortedRanges, font, fontSize, imageMode, labelOpt, textRot):
Martin@913
   371
    for i in sortedRanges:
Martin@907
   372
        warn("\t".join(map(str, i)))
Martin@866
   373
    warn("")
Martin@913
   374
    rangeSizes = [e - b for n, b, e in sortedRanges]
Martin@913
   375
    labs = list(rangeLabels(sortedRanges, labelOpt, font, fontSize,
Martin@913
   376
                            imageMode, textRot))
Martin@907
   377
    margin = max(i[2] for i in labs)
Martin@878
   378
    # xxx the margin may be too big, because some labels may get omitted
Martin@914
   379
    return rangeSizes, labs, margin
Martin@1
   380
Martin@1
   381
def div_ceil(x, y):
Martin@1
   382
    '''Return x / y rounded up.'''
Martin@1
   383
    q, r = divmod(x, y)
Martin@1
   384
    return q + (r != 0)
Martin@1
   385
Martin@896
   386
def get_bp_per_pix(rangeSizes, pixTweenRanges, maxPixels):
Martin@1
   387
    '''Get the minimum bp-per-pixel that fits in the size limit.'''
Martin@904
   388
    warn("choosing bp per pixel...")
Martin@896
   389
    numOfRanges = len(rangeSizes)
Martin@896
   390
    maxPixelsInRanges = maxPixels - pixTweenRanges * (numOfRanges - 1)
Martin@896
   391
    if maxPixelsInRanges < numOfRanges:
Martin@649
   392
        raise Exception("can't fit the image: too many sequences?")
Martin@896
   393
    negLimit = -maxPixelsInRanges
Martin@896
   394
    negBpPerPix = sum(rangeSizes) // negLimit
Martin@863
   395
    while True:
Martin@896
   396
        if sum(i // negBpPerPix for i in rangeSizes) >= negLimit:
Martin@863
   397
            return -negBpPerPix
Martin@863
   398
        negBpPerPix -= 1
Martin@1
   399
Martin@900
   400
def getRangePixBegs(rangePixLens, pixTweenRanges, margin):
Martin@900
   401
    '''Get the start pixel for each range.'''
Martin@900
   402
    rangePixBegs = []
Martin@896
   403
    pix_tot = margin - pixTweenRanges
Martin@900
   404
    for i in rangePixLens:
Martin@896
   405
        pix_tot += pixTweenRanges
Martin@900
   406
        rangePixBegs.append(pix_tot)
Martin@1
   407
        pix_tot += i
Martin@900
   408
    return rangePixBegs
Martin@1
   409
Martin@896
   410
def pixelData(rangeSizes, bp_per_pix, pixTweenRanges, margin):
Martin@900
   411
    '''Return pixel information about the ranges.'''
Martin@900
   412
    rangePixLens = [div_ceil(i, bp_per_pix) for i in rangeSizes]
Martin@900
   413
    rangePixBegs = getRangePixBegs(rangePixLens, pixTweenRanges, margin)
Martin@900
   414
    tot_pix = rangePixBegs[-1] + rangePixLens[-1]
Martin@900
   415
    return rangePixBegs, rangePixLens, tot_pix
Martin@1
   416
Martin@835
   417
def drawLineForward(hits, width, bp_per_pix, beg1, beg2, size):
Martin@639
   418
    while True:
Martin@639
   419
        q1, r1 = divmod(beg1, bp_per_pix)
Martin@639
   420
        q2, r2 = divmod(beg2, bp_per_pix)
Martin@835
   421
        hits[q2 * width + q1] |= 1
Martin@639
   422
        next_pix = min(bp_per_pix - r1, bp_per_pix - r2)
Martin@639
   423
        if next_pix >= size: break
Martin@639
   424
        beg1 += next_pix
Martin@639
   425
        beg2 += next_pix
Martin@639
   426
        size -= next_pix
Martin@639
   427
Martin@835
   428
def drawLineReverse(hits, width, bp_per_pix, beg1, beg2, size):
Martin@639
   429
    while True:
Martin@639
   430
        q1, r1 = divmod(beg1, bp_per_pix)
Martin@639
   431
        q2, r2 = divmod(beg2, bp_per_pix)
Martin@835
   432
        hits[q2 * width + q1] |= 2
Martin@639
   433
        next_pix = min(bp_per_pix - r1, r2 + 1)
Martin@639
   434
        if next_pix >= size: break
Martin@639
   435
        beg1 += next_pix
Martin@639
   436
        beg2 -= next_pix
Martin@639
   437
        size -= next_pix
Martin@639
   438
Martin@905
   439
def findOrigin(ranges, beg, size):
Martin@905
   440
    if beg < 0:
Martin@905
   441
        beg = -(beg + size)
Martin@905
   442
    for rangeBeg, rangeEnd, origin in ranges:
Martin@905
   443
        if rangeEnd > beg:
Martin@905
   444
            return origin
Martin@905
   445
Martin@905
   446
def alignmentPixels(width, height, alignments, bp_per_pix,
Martin@905
   447
                    rangeDict1, rangeDict2):
Martin@640
   448
    hits = [0] * (width * height)  # the image data
Martin@640
   449
    for seq1, seq2, blocks in alignments:
Martin@905
   450
        beg1, beg2, size = blocks[0]
Martin@905
   451
        ori1 = findOrigin(rangeDict1[seq1], beg1, size)
Martin@905
   452
        ori2 = findOrigin(rangeDict2[seq2], beg2, size)
Martin@640
   453
        for beg1, beg2, size in blocks:
Martin@640
   454
            if beg1 < 0:
Martin@640
   455
                beg1 = -(beg1 + size)
Martin@640
   456
                beg2 = -(beg2 + size)
Martin@640
   457
            if beg2 >= 0:
Martin@835
   458
                drawLineForward(hits, width, bp_per_pix,
Martin@915
   459
                                ori1 + beg1, ori2 + beg2, size)
Martin@640
   460
            else:
Martin@835
   461
                drawLineReverse(hits, width, bp_per_pix,
Martin@915
   462
                                ori1 + beg1, ori2 - beg2 - 1, size)
Martin@640
   463
    return hits
Martin@1
   464
Martin@650
   465
def expandedSeqDict(seqDict):
Martin@650
   466
    '''Allow lookup by short sequence names, e.g. chr7 as well as hg19.chr7.'''
Martin@861
   467
    newDict = seqDict.copy()
Martin@650
   468
    for name, x in seqDict.items():
Martin@861
   469
        if "." in name:
Martin@861
   470
            base = name.split(".")[-1]
Martin@861
   471
            if base in newDict:  # an ambiguous case was found:
Martin@861
   472
                return seqDict   # so give up completely
Martin@861
   473
            newDict[base] = x
Martin@650
   474
    return newDict
Martin@650
   475
Martin@905
   476
def readBed(fileName, rangeDict):
Martin@845
   477
    for line in myOpen(fileName):
Martin@845
   478
        w = line.split()
Martin@847
   479
        if not w: continue
Martin@845
   480
        seqName = w[0]
Martin@905
   481
        if seqName not in rangeDict: continue
Martin@845
   482
        beg = int(w[1])
Martin@845
   483
        end = int(w[2])
Martin@857
   484
        layer = 900
Martin@895
   485
        color = "#fbf"
Martin@858
   486
        if len(w) > 4:
Martin@858
   487
            if w[4] != ".":
Martin@858
   488
                layer = float(w[4])
Martin@858
   489
            if len(w) > 5:
Martin@858
   490
                if len(w) > 8 and w[8].count(",") == 2:
Martin@858
   491
                    color = "rgb(" + w[8] + ")"
Martin@858
   492
                elif w[5] == "+":
Martin@895
   493
                    color = "#ffe8e8"
Martin@858
   494
                elif w[5] == "-":
Martin@895
   495
                    color = "#e8e8ff"
Martin@859
   496
        yield layer, color, seqName, beg, end
Martin@845
   497
Martin@860
   498
def commaSeparatedInts(text):
Martin@860
   499
    return map(int, text.rstrip(",").split(","))
Martin@860
   500
Martin@905
   501
def readGenePred(opts, fileName, rangeDict):
Martin@860
   502
    for line in myOpen(fileName):
Martin@860
   503
        fields = line.split()
Martin@860
   504
        if not fields: continue
Martin@860
   505
        if fields[2] not in "+-": fields = fields[1:]
Martin@860
   506
        seqName = fields[1]
Martin@905
   507
        if seqName not in rangeDict: continue
Martin@860
   508
        #strand = fields[2]
Martin@860
   509
        cdsBeg = int(fields[5])
Martin@860
   510
        cdsEnd = int(fields[6])
Martin@860
   511
        exonBegs = commaSeparatedInts(fields[8])
Martin@860
   512
        exonEnds = commaSeparatedInts(fields[9])
Martin@860
   513
        for beg, end in zip(exonBegs, exonEnds):
Martin@860
   514
            yield 300, opts.exon_color, seqName, beg, end
Martin@860
   515
            b = max(beg, cdsBeg)
Martin@860
   516
            e = min(end, cdsEnd)
Martin@860
   517
            if b < e: yield 400, opts.cds_color, seqName, b, e
Martin@860
   518
Martin@905
   519
def readRmsk(fileName, rangeDict):
Martin@860
   520
    for line in myOpen(fileName):
Martin@860
   521
        fields = line.split()
Martin@860
   522
        if len(fields) == 17:  # rmsk.txt
Martin@860
   523
            seqName = fields[5]
Martin@905
   524
            if seqName not in rangeDict: continue  # do this ASAP for speed
Martin@860
   525
            beg = int(fields[6])
Martin@860
   526
            end = int(fields[7])
Martin@860
   527
            strand = fields[9]
Martin@860
   528
            repeatClass = fields[11]
Martin@860
   529
        elif len(fields) == 15:  # .out
Martin@860
   530
            seqName = fields[4]
Martin@905
   531
            if seqName not in rangeDict: continue
Martin@860
   532
            beg = int(fields[5]) - 1
Martin@860
   533
            end = int(fields[6])
Martin@860
   534
            strand = fields[8]
Martin@860
   535
            repeatClass = fields[10]
Martin@860
   536
        else:
Martin@860
   537
            continue
Martin@860
   538
        if repeatClass in ("Low_complexity", "Simple_repeat"):
Martin@895
   539
            yield 200, "#fbf", seqName, beg, end
Martin@860
   540
        elif strand == "+":
Martin@895
   541
            yield 100, "#ffe8e8", seqName, beg, end
Martin@860
   542
        else:
Martin@895
   543
            yield 100, "#e8e8ff", seqName, beg, end
Martin@860
   544
Martin@650
   545
def isExtraFirstGapField(fields):
Martin@650
   546
    return fields[4].isdigit()
Martin@650
   547
Martin@905
   548
def readGaps(opts, fileName, rangeDict):
Martin@650
   549
    '''Read locations of unsequenced gaps, from an agp or gap file.'''
Martin@844
   550
    for line in myOpen(fileName):
Martin@650
   551
        w = line.split()
Martin@650
   552
        if not w or w[0][0] == "#": continue
Martin@650
   553
        if isExtraFirstGapField(w): w = w[1:]
Martin@650
   554
        if w[4] not in "NU": continue
Martin@650
   555
        seqName = w[0]
Martin@905
   556
        if seqName not in rangeDict: continue
Martin@650
   557
        end = int(w[2])
Martin@650
   558
        beg = end - int(w[5])  # zero-based coordinate
Martin@857
   559
        if w[7] == "yes":
Martin@859
   560
            yield 3000, opts.bridged_color, seqName, beg, end
Martin@857
   561
        else:
Martin@859
   562
            yield 2000, opts.unbridged_color, seqName, beg, end
Martin@650
   563
Martin@905
   564
def bedBoxes(beds, rangeDict, margin, edge, isTop, bpPerPix):
Martin@897
   565
    for layer, color, seqName, bedBeg, bedEnd in beds:
Martin@905
   566
        for rangeBeg, rangeEnd, origin in rangeDict[seqName]:
Martin@905
   567
            beg = max(bedBeg, rangeBeg)
Martin@905
   568
            end = min(bedEnd, rangeEnd)
Martin@905
   569
            if beg >= end: continue
Martin@905
   570
            if layer <= 1000:
Martin@905
   571
                # include partly-covered pixels
Martin@905
   572
                b = (origin + beg) // bpPerPix
Martin@905
   573
                e = div_ceil(origin + end, bpPerPix)
Martin@905
   574
            else:
Martin@905
   575
                # exclude partly-covered pixels
Martin@905
   576
                b = div_ceil(origin + beg, bpPerPix)
Martin@905
   577
                e = (origin + end) // bpPerPix
Martin@905
   578
                if e <= b: continue
Martin@912
   579
                if end == rangeEnd:  # include partly-covered end pixels
Martin@912
   580
                    e = div_ceil(origin + end, bpPerPix)
Martin@905
   581
            if isTop:
Martin@905
   582
                box = b, margin, e, edge
Martin@905
   583
            else:
Martin@905
   584
                box = margin, b, edge, e
Martin@905
   585
            yield layer, color, box
Martin@845
   586
Martin@857
   587
def drawAnnotations(im, boxes):
Martin@857
   588
    # xxx use partial transparency for different-color overlaps?
Martin@857
   589
    for layer, color, box in boxes:
Martin@650
   590
        im.paste(color, box)
Martin@650
   591
Martin@901
   592
def placedLabels(labels, rangePixBegs, rangePixLens, beg, end):
Martin@901
   593
    '''Return axis labels with endpoint & sort-order information.'''
Martin@901
   594
    maxWidth = end - beg
Martin@901
   595
    for i, j, k in zip(labels, rangePixBegs, rangePixLens):
Martin@901
   596
        text, textWidth, textHeight = i
Martin@901
   597
        if textWidth > maxWidth:
Martin@901
   598
            continue
Martin@901
   599
        labelBeg = j + (k - textWidth) // 2
Martin@901
   600
        labelEnd = labelBeg + textWidth
Martin@901
   601
        sortKey = textWidth - k
Martin@901
   602
        if labelBeg < beg:
Martin@904
   603
            sortKey += maxWidth * (beg - labelBeg)
Martin@901
   604
            labelBeg = beg
Martin@901
   605
            labelEnd = beg + textWidth
Martin@901
   606
        if labelEnd > end:
Martin@904
   607
            sortKey += maxWidth * (labelEnd - end)
Martin@901
   608
            labelEnd = end
Martin@901
   609
            labelBeg = end - textWidth
Martin@901
   610
        yield sortKey, labelBeg, labelEnd, text, textHeight
Martin@1
   611
Martin@897
   612
def nonoverlappingLabels(labels, minPixTweenLabels):
Martin@1
   613
    '''Get a subset of non-overlapping axis labels, greedily.'''
Martin@897
   614
    out = []
Martin@1
   615
    for i in labels:
Martin@897
   616
        beg = i[1] - minPixTweenLabels
Martin@897
   617
        end = i[2] + minPixTweenLabels
Martin@897
   618
        if all(j[2] <= beg or j[1] >= end for j in out):
Martin@897
   619
            out.append(i)
Martin@897
   620
    return out
Martin@1
   621
Martin@901
   622
def axisImage(labels, rangePixBegs, rangePixLens, textRot,
Martin@895
   623
              textAln, font, image_mode, opts):
Martin@1
   624
    '''Make an image of axis labels.'''
Martin@900
   625
    beg = rangePixBegs[0]
Martin@900
   626
    end = rangePixBegs[-1] + rangePixLens[-1]
Martin@901
   627
    margin = max(i[2] for i in labels)
Martin@901
   628
    labels = sorted(placedLabels(labels, rangePixBegs, rangePixLens, beg, end))
Martin@878
   629
    minPixTweenLabels = 0 if textRot else opts.label_space
Martin@897
   630
    labels = nonoverlappingLabels(labels, minPixTweenLabels)
Martin@897
   631
    image_size = (margin, end) if textRot else (end, margin)
Martin@895
   632
    im = Image.new(image_mode, image_size, opts.margin_color)
Martin@1
   633
    draw = ImageDraw.Draw(im)
Martin@915
   634
    for sortKey, labelBeg, labelEnd, text, textHeight in labels:
Martin@915
   635
        base = margin - textHeight if textAln else 0
Martin@915
   636
        position = (base, labelBeg) if textRot else (labelBeg, base)
Martin@915
   637
        draw.text(position, text, font=font, fill=opts.text_color)
Martin@1
   638
    return im
Martin@1
   639
Martin@906
   640
def rangesWithOrigins(sortedRanges, rangePixBegs, bpPerPix):
Martin@906
   641
    for i, j in zip(sortedRanges, rangePixBegs):
Martin@906
   642
        seqName, rangeBeg, rangeEnd = i
Martin@906
   643
        origin = bpPerPix * j - rangeBeg
Martin@906
   644
        yield seqName, (rangeBeg, rangeEnd, origin)
Martin@906
   645
Martin@906
   646
def rangesPerSeq(sortedRanges, rangePixBegs, bpPerPix):
Martin@906
   647
    a = rangesWithOrigins(sortedRanges, rangePixBegs, bpPerPix)
Martin@906
   648
    for k, v in itertools.groupby(a, itemgetter(0)):
Martin@906
   649
        yield k, [i[1] for i in v]
Martin@836
   650
Martin@903
   651
def getFont(opts):
Martin@903
   652
    if opts.fontfile:
Martin@903
   653
        return ImageFont.truetype(opts.fontfile, opts.fontsize)
Martin@903
   654
    fileNames = []
Martin@903
   655
    try:
Martin@903
   656
        x = ["fc-match", "-f%{file}", "arial"]
Martin@903
   657
        p = subprocess.Popen(x, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
Martin@903
   658
        out, err = p.communicate()
Martin@903
   659
        fileNames.append(out)
Martin@903
   660
    except OSError as e:
Martin@903
   661
        warn("fc-match error: " + str(e))
Martin@903
   662
    fileNames.append("/Library/Fonts/Arial.ttf")  # for Mac
Martin@903
   663
    for i in fileNames:
Martin@903
   664
        try:
Martin@903
   665
            font = ImageFont.truetype(i, opts.fontsize)
Martin@903
   666
            warn("font: " + i)
Martin@903
   667
            return font
Martin@903
   668
        except IOError as e:
Martin@903
   669
            warn("font load error: " + str(e))
Martin@903
   670
    return ImageFont.load_default()
Martin@903
   671
Martin@648
   672
def lastDotplot(opts, args):
Martin@903
   673
    font = getFont(opts)
Martin@643
   674
    image_mode = 'RGB'
Martin@643
   675
    forward_color = ImageColor.getcolor(opts.forwardcolor, image_mode)
Martin@643
   676
    reverse_color = ImageColor.getcolor(opts.reversecolor, image_mode)
Martin@643
   677
    zipped_colors = zip(forward_color, reverse_color)
Martin@643
   678
    overlap_color = tuple([(i + j) // 2 for i, j in zipped_colors])
Martin@641
   679
Martin@911
   680
    maxGap1, maxGapB1 = twoValuesFromOption(opts.max_gap1, ":")
Martin@911
   681
    maxGap2, maxGapB2 = twoValuesFromOption(opts.max_gap2, ":")
Martin@911
   682
Martin@644
   683
    warn("reading alignments...")
Martin@904
   684
    alnData = readAlignments(args[0], opts)
Martin@909
   685
    alignments, seqRanges1, coverDict1, seqRanges2, coverDict2 = alnData
Martin@649
   686
    if not alignments: raise Exception("there are no alignments")
Martin@910
   687
    warn("cutting...")
Martin@910
   688
    coverDict1 = dict(mergedRangesPerSeq(coverDict1))
Martin@910
   689
    coverDict2 = dict(mergedRangesPerSeq(coverDict2))
Martin@910
   690
    minAlignedBases = min(coveredLength(coverDict1), coveredLength(coverDict2))
Martin@910
   691
    pad = int(opts.pad * minAlignedBases)
Martin@910
   692
    cutRanges1 = list(trimmed(seqRanges1, coverDict1, minAlignedBases,
Martin@911
   693
                              maxGap1, pad, pad))
Martin@910
   694
    cutRanges2 = list(trimmed(seqRanges2, coverDict2, minAlignedBases,
Martin@911
   695
                              maxGap2, pad, pad))
Martin@911
   696
Martin@911
   697
    warn("reading secondary alignments...")
Martin@911
   698
    alnDataB = readSecondaryAlignments(opts, cutRanges1, cutRanges2)
Martin@911
   699
    alignmentsB, seqRangesB1, coverDictB1, seqRangesB2, coverDictB2 = alnDataB
Martin@911
   700
    warn("cutting...")
Martin@911
   701
    coverDictB1 = dict(mergedRangesPerSeq(coverDictB1))
Martin@911
   702
    coverDictB2 = dict(mergedRangesPerSeq(coverDictB2))
Martin@911
   703
    cutRangesB1 = trimmed(seqRangesB1, coverDictB1, minAlignedBases,
Martin@911
   704
                          maxGapB1, 0, 0)
Martin@911
   705
    cutRangesB2 = trimmed(seqRangesB2, coverDictB2, minAlignedBases,
Martin@911
   706
                          maxGapB2, 0, 0)
Martin@641
   707
Martin@914
   708
    warn("sorting...")
Martin@914
   709
    sortOut = allSortedRanges(opts, alignments, alignmentsB,
Martin@914
   710
                              cutRanges1, cutRangesB1, cutRanges2, cutRangesB2)
Martin@914
   711
    sortedRanges1, sortedRanges2 = sortOut
Martin@914
   712
Martin@878
   713
    textRot1 = "vertical".startswith(opts.rot1)
Martin@914
   714
    i1 = dataFromRanges(sortedRanges1, font,
Martin@908
   715
                        opts.fontsize, image_mode, opts.labels1, textRot1)
Martin@914
   716
    rangeSizes1, labelData1, tMargin = i1
Martin@846
   717
Martin@878
   718
    textRot2 = "horizontal".startswith(opts.rot2)
Martin@914
   719
    i2 = dataFromRanges(sortedRanges2, font,
Martin@908
   720
                        opts.fontsize, image_mode, opts.labels2, textRot2)
Martin@914
   721
    rangeSizes2, labelData2, lMargin = i2
Martin@641
   722
Martin@896
   723
    maxPixels1 = opts.width  - lMargin
Martin@896
   724
    maxPixels2 = opts.height - tMargin
Martin@897
   725
    bpPerPix1 = get_bp_per_pix(rangeSizes1, opts.border_pixels, maxPixels1)
Martin@897
   726
    bpPerPix2 = get_bp_per_pix(rangeSizes2, opts.border_pixels, maxPixels2)
Martin@855
   727
    bpPerPix = max(bpPerPix1, bpPerPix2)
Martin@855
   728
    warn("bp per pixel = " + str(bpPerPix))
Martin@641
   729
Martin@900
   730
    p1 = pixelData(rangeSizes1, bpPerPix, opts.border_pixels, lMargin)
Martin@900
   731
    rangePixBegs1, rangePixLens1, width = p1
Martin@906
   732
    rangeDict1 = dict(rangesPerSeq(sortedRanges1, rangePixBegs1, bpPerPix))
Martin@900
   733
Martin@900
   734
    p2 = pixelData(rangeSizes2, bpPerPix, opts.border_pixels, tMargin)
Martin@900
   735
    rangePixBegs2, rangePixLens2, height = p2
Martin@906
   736
    rangeDict2 = dict(rangesPerSeq(sortedRanges2, rangePixBegs2, bpPerPix))
Martin@900
   737
Martin@847
   738
    warn("width:  " + str(width))
Martin@847
   739
    warn("height: " + str(height))
Martin@839
   740
Martin@644
   741
    warn("processing alignments...")
Martin@911
   742
    hits = alignmentPixels(width, height, alignments + alignmentsB, bpPerPix,
Martin@905
   743
                           rangeDict1, rangeDict2)
Martin@641
   744
Martin@904
   745
    warn("reading annotations...")
Martin@134
   746
Martin@905
   747
    rangeDict1 = expandedSeqDict(rangeDict1)
Martin@905
   748
    beds1 = itertools.chain(readBed(opts.bed1, rangeDict1),
Martin@905
   749
                            readRmsk(opts.rmsk1, rangeDict1),
Martin@905
   750
                            readGenePred(opts, opts.genePred1, rangeDict1),
Martin@905
   751
                            readGaps(opts, opts.gap1, rangeDict1))
Martin@905
   752
    b1 = bedBoxes(beds1, rangeDict1, tMargin, height, True, bpPerPix)
Martin@845
   753
Martin@905
   754
    rangeDict2 = expandedSeqDict(rangeDict2)
Martin@905
   755
    beds2 = itertools.chain(readBed(opts.bed2, rangeDict2),
Martin@905
   756
                            readRmsk(opts.rmsk2, rangeDict2),
Martin@905
   757
                            readGenePred(opts, opts.genePred2, rangeDict2),
Martin@905
   758
                            readGaps(opts, opts.gap2, rangeDict2))
Martin@905
   759
    b2 = bedBoxes(beds2, rangeDict2, lMargin, width, False, bpPerPix)
Martin@857
   760
Martin@857
   761
    boxes = sorted(itertools.chain(b1, b2))
Martin@904
   762
Martin@904
   763
    warn("drawing...")
Martin@904
   764
Martin@904
   765
    image_size = width, height
Martin@904
   766
    im = Image.new(image_mode, image_size, opts.background_color)
Martin@904
   767
Martin@857
   768
    drawAnnotations(im, boxes)
Martin@650
   769
Martin@643
   770
    for i in range(height):
Martin@643
   771
        for j in range(width):
Martin@643
   772
            store_value = hits[i * width + j]
Martin@643
   773
            xy = j, i
Martin@643
   774
            if   store_value == 1: im.putpixel(xy, forward_color)
Martin@643
   775
            elif store_value == 2: im.putpixel(xy, reverse_color)
Martin@643
   776
            elif store_value == 3: im.putpixel(xy, overlap_color)
Martin@95
   777
Martin@643
   778
    if opts.fontsize != 0:
Martin@900
   779
        axis1 = axisImage(labelData1, rangePixBegs1, rangePixLens1,
Martin@895
   780
                          textRot1, False, font, image_mode, opts)
Martin@878
   781
        if textRot1:
Martin@878
   782
            axis1 = axis1.transpose(Image.ROTATE_90)
Martin@900
   783
        axis2 = axisImage(labelData2, rangePixBegs2, rangePixLens2,
Martin@895
   784
                          textRot2, textRot2, font, image_mode, opts)
Martin@878
   785
        if not textRot2:
Martin@878
   786
            axis2 = axis2.transpose(Image.ROTATE_270)
Martin@643
   787
        im.paste(axis1, (0, 0))
Martin@643
   788
        im.paste(axis2, (0, 0))
Martin@1
   789
Martin@900
   790
    for i in rangePixBegs1[1:]:
Martin@877
   791
        box = i - opts.border_pixels, tMargin, i, height
Martin@852
   792
        im.paste(opts.border_color, box)
Martin@1
   793
Martin@900
   794
    for i in rangePixBegs2[1:]:
Martin@877
   795
        box = lMargin, i - opts.border_pixels, width, i
Martin@852
   796
        im.paste(opts.border_color, box)
Martin@1
   797
Martin@643
   798
    im.save(args[1])
Martin@648
   799
Martin@648
   800
if __name__ == "__main__":
Martin@649
   801
    usage = """%prog --help
Martin@649
   802
   or: %prog [options] maf-or-tab-alignments dotplot.png
Martin@649
   803
   or: %prog [options] maf-or-tab-alignments dotplot.gif
Martin@649
   804
   or: ..."""
Martin@649
   805
    description = "Draw a dotplot of pair-wise sequence alignments in MAF or tabular format."
Martin@649
   806
    op = optparse.OptionParser(usage=usage, description=description)
Martin@866
   807
    op.add_option("-v", "--verbose", action="count",
Martin@866
   808
                  help="show progress messages & data about the plot")
Martin@651
   809
    op.add_option("-1", "--seq1", metavar="PATTERN", action="append",
Martin@840
   810
                  default=[],
Martin@651
   811
                  help="which sequences to show from the 1st genome")
Martin@651
   812
    op.add_option("-2", "--seq2", metavar="PATTERN", action="append",
Martin@840
   813
                  default=[],
Martin@651
   814
                  help="which sequences to show from the 2nd genome")
Martin@648
   815
    # Replace "width" & "height" with a single "length" option?
Martin@648
   816
    op.add_option("-x", "--width", type="int", default=1000,
Martin@648
   817
                  help="maximum width in pixels (default: %default)")
Martin@648
   818
    op.add_option("-y", "--height", type="int", default=1000,
Martin@648
   819
                  help="maximum height in pixels (default: %default)")
Martin@649
   820
    op.add_option("-c", "--forwardcolor", metavar="COLOR", default="red",
Martin@649
   821
                  help="color for forward alignments (default: %default)")
Martin@649
   822
    op.add_option("-r", "--reversecolor", metavar="COLOR", default="blue",
Martin@649
   823
                  help="color for reverse alignments (default: %default)")
Martin@911
   824
    op.add_option("--alignments", metavar="FILE", help="secondary alignments")
Martin@907
   825
    op.add_option("--sort1", default="1", metavar="N",
Martin@851
   826
                  help="genome1 sequence order: 0=input order, 1=name order, "
Martin@914
   827
                  "2=length order, 3=alignment order (default=%default)")
Martin@907
   828
    op.add_option("--sort2", default="1", metavar="N",
Martin@851
   829
                  help="genome2 sequence order: 0=input order, 1=name order, "
Martin@914
   830
                  "2=length order, 3=alignment order (default=%default)")
Martin@910
   831
    op.add_option("--max-gap1", metavar="FRAC", default="0.5,2", help=
Martin@910
   832
                  "maximum unaligned (end,mid) gap in genome1: "
Martin@910
   833
                  "fraction of aligned length (default=%default)")
Martin@910
   834
    op.add_option("--max-gap2", metavar="FRAC", default="0.5,2", help=
Martin@910
   835
                  "maximum unaligned (end,mid) gap in genome2: "
Martin@910
   836
                  "fraction of aligned length (default=%default)")
Martin@910
   837
    op.add_option("--pad", metavar="FRAC", type="float", default=0.04, help=
Martin@910
   838
                  "pad length when cutting unaligned gaps: "
Martin@910
   839
                  "fraction of aligned length (default=%default)")
Martin@852
   840
    op.add_option("--border-pixels", metavar="INT", type="int", default=1,
Martin@852
   841
                  help="number of pixels between sequences (default=%default)")
Martin@895
   842
    op.add_option("--border-color", metavar="COLOR", default="black",
Martin@852
   843
                  help="color for pixels between sequences (default=%default)")
Martin@911
   844
    # --break-color and/or --break-pixels for intra-sequence breaks?
Martin@895
   845
    op.add_option("--margin-color", metavar="COLOR", default="#dcdcdc",
Martin@895
   846
                  help="margin color")
Martin@846
   847
Martin@850
   848
    og = optparse.OptionGroup(op, "Text options")
Martin@850
   849
    og.add_option("-f", "--fontfile", metavar="FILE",
Martin@850
   850
                  help="TrueType or OpenType font file")
Martin@903
   851
    og.add_option("-s", "--fontsize", metavar="SIZE", type="int", default=14,
Martin@850
   852
                  help="TrueType or OpenType font size (default: %default)")
Martin@898
   853
    og.add_option("--labels1", type="int", default=0, metavar="N", help=
Martin@898
   854
                  "genome1 labels: 0=name, 1=name:length, "
Martin@898
   855
                  "2=name:start:length, 3=name:start-end (default=%default)")
Martin@898
   856
    og.add_option("--labels2", type="int", default=0, metavar="N", help=
Martin@898
   857
                  "genome2 labels: 0=name, 1=name:length, "
Martin@898
   858
                  "2=name:start:length, 3=name:start-end (default=%default)")
Martin@878
   859
    og.add_option("--rot1", metavar="ROT", default="h",
Martin@878
   860
                  help="text rotation for the 1st genome (default=%default)")
Martin@878
   861
    og.add_option("--rot2", metavar="ROT", default="v",
Martin@878
   862
                  help="text rotation for the 2nd genome (default=%default)")
Martin@850
   863
    op.add_option_group(og)
Martin@850
   864
Martin@860
   865
    og = optparse.OptionGroup(op, "Annotation options")
Martin@860
   866
    og.add_option("--bed1", metavar="FILE",
Martin@860
   867
                  help="read genome1 annotations from BED file")
Martin@860
   868
    og.add_option("--bed2", metavar="FILE",
Martin@860
   869
                  help="read genome2 annotations from BED file")
Martin@860
   870
    og.add_option("--rmsk1", metavar="FILE", help="read genome1 repeats from "
Martin@860
   871
                  "RepeatMasker .out or rmsk.txt file")
Martin@860
   872
    og.add_option("--rmsk2", metavar="FILE", help="read genome2 repeats from "
Martin@860
   873
                  "RepeatMasker .out or rmsk.txt file")
Martin@860
   874
    op.add_option_group(og)
Martin@860
   875
Martin@860
   876
    og = optparse.OptionGroup(op, "Gene options")
Martin@860
   877
    og.add_option("--genePred1", metavar="FILE",
Martin@860
   878
                  help="read genome1 genes from genePred file")
Martin@860
   879
    og.add_option("--genePred2", metavar="FILE",
Martin@860
   880
                  help="read genome2 genes from genePred file")
Martin@895
   881
    og.add_option("--exon-color", metavar="COLOR", default="PaleGreen",
Martin@860
   882
                  help="color for exons (default=%default)")
Martin@895
   883
    og.add_option("--cds-color", metavar="COLOR", default="LimeGreen",
Martin@860
   884
                  help="color for protein-coding regions (default=%default)")
Martin@860
   885
    op.add_option_group(og)
Martin@860
   886
Martin@650
   887
    og = optparse.OptionGroup(op, "Unsequenced gap options")
Martin@650
   888
    og.add_option("--gap1", metavar="FILE",
Martin@650
   889
                  help="read genome1 unsequenced gaps from agp or gap file")
Martin@650
   890
    og.add_option("--gap2", metavar="FILE",
Martin@650
   891
                  help="read genome2 unsequenced gaps from agp or gap file")
Martin@650
   892
    og.add_option("--bridged-color", metavar="COLOR", default="yellow",
Martin@650
   893
                  help="color for bridged gaps (default: %default)")
Martin@895
   894
    og.add_option("--unbridged-color", metavar="COLOR", default="orange",
Martin@650
   895
                  help="color for unbridged gaps (default: %default)")
Martin@650
   896
    op.add_option_group(og)
Martin@648
   897
    (opts, args) = op.parse_args()
Martin@648
   898
    if len(args) != 2: op.error("2 arguments needed")
Martin@648
   899
Martin@648
   900
    opts.text_color = "black"
Martin@648
   901
    opts.background_color = "white"
Martin@648
   902
    opts.label_space = 5     # minimum number of pixels between axis labels
Martin@648
   903
Martin@649
   904
    try: lastDotplot(opts, args)
Martin@649
   905
    except KeyboardInterrupt: pass  # avoid silly error message
Martin@903
   906
    except Exception as e:
Martin@649
   907
        prog = os.path.basename(sys.argv[0])
Martin@649
   908
        sys.exit(prog + ": error: " + str(e))