Function padInsideLabelsOnAnchorAxis

src/plots/cartesian/autorange.js:250–318

(fullLayout, ax, max)

var TEXTPAD = 3;

function padInsideLabelsOnAnchorAxis(fullLayout, ax, max) {
    var pad = 0;

    var isX = ax._id.charAt(0) === 'x';

    for(var subplot in fullLayout._plots) {
        var plotinfo = fullLayout._plots[subplot];

        if(ax._id !== plotinfo.xaxis._id && ax._id !== plotinfo.yaxis._id) continue;

        var anchorAxis = (isX ? plotinfo.yaxis : plotinfo.xaxis) || {};

        if((anchorAxis.ticklabelposition || '').indexOf('inside') !== -1) {
            // increase padding to make more room for inside tick labels of the counter axis
            if((
                !max && (
                    anchorAxis.side === 'left' ||
                    anchorAxis.side === 'bottom'
                )
            ) || (
                max && (
                    anchorAxis.side === 'top' ||
                    anchorAxis.side === 'right'
                )
            )) {
                if(anchorAxis._vals) {
                    var rad = Lib.deg2rad(anchorAxis._tickAngles[anchorAxis._id + 'tick'] || 0);
                    var cosA = Math.abs(Math.cos(rad));
                    var sinA = Math.abs(Math.sin(rad));

                    // no stashed bounding boxes - stash bounding boxes
                    if(!anchorAxis._vals[0].bb) {
                        var cls = anchorAxis._id + 'tick';
                        var tickLabels = anchorAxis._selections[cls];
                        tickLabels.each(function(d) {
                            var thisLabel = d3.select(this);
                            var mathjaxGroup = thisLabel.select('.text-math-group');
                            if(mathjaxGroup.empty()) {
                                d.bb = Drawing.bBox(thisLabel.node());
                            }
                        });
                    }

                    // use bounding boxes
                    for(var i = 0; i < anchorAxis._vals.length; i++) {
                        var t = anchorAxis._vals[i];
                        var bb = t.bb;

                        if(bb) {
                            var w = 2 * TEXTPAD + bb.width;
                            var h = 2 * TEXTPAD + bb.height;

                            pad = Math.max(pad, isX ?
                                Math.max(w * cosA, h * sinA) :
                                Math.max(h * cosA, w * sinA)
                            );
                        }
                    }