def adjustColumnWidths()

in assets/support/faq/docbook-xsl/extensions/xsltproc/python/docbook.py [0:0]

• 94 lines of code
• 24 McCabe index (conditional complexity)

def adjustColumnWidths(ctx, nodeset):
    #
    # Small check to verify the context is correcly accessed
    #
    try:
        pctxt = libxslt.xpathParserContext(_obj=ctx)
        ctxt = pctxt.context()
        tctxt = ctxt.transformContext()
    except:
        pass

    # Get the nominal table width
    varString = lookupVariable(tctxt, "nominal.table.width", None);
    if varString == None:
        nominalWidth = 6 * pixelsPerInch;
    else:
        nominalWidth = convertLength(varString);

    # Get the requested table width
    tableWidth = lookupVariable(tctxt, "table.width", "100%")

    foStylesheet = (tctxt.variableLookup("stylesheet.result.type", None) == "fo");

    relTotal = 0
    relParts = []

    absTotal = 0
    absParts = []

    colgroup = libxml2.xmlNode(_obj = nodeset[0])
    # If this is an foStylesheet, we've been passed a list of fo:table-columns.
    # Otherwise we've been passed a colgroup that contains a list of cols.
    if foStylesheet:
        colChildren = colgroup
    else:
        colChildren = colgroup.children

    col = colChildren
    while col != None:
        if foStylesheet:
            width = col.prop("column-width")
        else:
            width = col.prop("width")

        if width == None:
            width = "1*"

        relPart = 0.0;
        absPart = 0.0;
        starPos = string.find(width, "*");
        if starPos >= 0:
            relPart, absPart = string.split(width, "*", 2)
            relPart = float(relPart);
            relTotal = relTotal + float(relPart)
        else:
            absPart = width

        pixels = convertLength(absPart);
        absTotal = absTotal + pixels;

        relParts.append(relPart);
        absParts.append(pixels);

        col = col.next

    # Ok, now we have the relative widths and absolute widths in
    # two parallel arrays.
    #
    # - If there are no relative widths, output the absolute widths
    # - If there are no absolute widths, output the relative widths
    # - If there are a mixture of relative and absolute widths,
    #   - If the table width is absolute, turn these all into absolute
    #     widths.
    #   - If the table width is relative, turn these all into absolute
    #     widths in the nominalWidth and then turn them back into
    #     percentages.

    widths = [];

    if relTotal == 0:
        for absPart in absParts:
            if foStylesheet:
                inches = absPart / pixelsPerInch
                widths.append("%4.2fin" % inches)
            else:
                widths.append("%d" % absPart)
    elif absTotal == 0:
        for relPart in relParts:
            rel = relPart / relTotal * 100;
            widths.append(rel);
        widths = correctRoundingError(widths)
    else:
        pixelWidth = nominalWidth;
        if string.find(tableWidth, "%") < 0:
            pixelWidth = convertLength(tableWidth);

        if pixelWidth <= absTotal:
            print "Table is wider than table width"
        else:
            pixelWidth = pixelWidth - absTotal;

        absTotal = 0
        for count in range(len(relParts)):
            rel = relParts[count] / relTotal * pixelWidth
            relParts[count] = rel + absParts[count]
            absTotal = absTotal + rel + absParts[count]

        if string.find(tableWidth, "%") < 0:
            for count in range(len(relParts)):
                if foStylesheet:
                    pixels = relParts[count]
                    inches = pixels / pixelsPerInch
                    widths.append("%4.2fin" % inches)
                else:
                    widths.append(relParts[count])
        else:
            for count in range(len(relParts)):
                rel = relParts[count] / absTotal * 100
                widths.append(rel)
            widths = correctRoundingError(widths)

    # Danger, Will Robinson! In-place modification of the result tree!
    # Side-effect free? We don' need no steenkin' side-effect free!
    count = 0
    col = colChildren
    while col != None:
        if foStylesheet:
            col.setProp("column-width", widths[count])
        else:
            col.setProp("width", widths[count])

        count = count+1
        col = col.next

    return nodeset