Function toMoveOutsideBar

src/traces/bar/plot.js:923–979

(x0, x1, y0, y1, textBB, opts)

}

function toMoveOutsideBar(x0, x1, y0, y1, textBB, opts) {
    var isHorizontal = !!opts.isHorizontal;
    var constrained = !!opts.constrained;
    var angle = opts.angle || 0;

    var textWidth = textBB.width;
    var textHeight = textBB.height;
    var lx = Math.abs(x1 - x0);
    var ly = Math.abs(y1 - y0);

    var textpad;
    // Keep the padding so the text doesn't sit right against
    // the bars, but don't factor it into barWidth
    if (isHorizontal) {
        textpad = ly > 2 * TEXTPAD ? TEXTPAD : 0;
    } else {
        textpad = lx > 2 * TEXTPAD ? TEXTPAD : 0;
    }

    // compute rotate and scale
    var scale = 1;
    if (constrained) {
        scale = isHorizontal ? Math.min(1, ly / textHeight) : Math.min(1, lx / textWidth);
    }

    var rotate = getRotateFromAngle(angle);
    var t = getRotatedTextSize(textBB, rotate);

    // compute text and target positions
    var extrapad = (isHorizontal ? t.x : t.y) / 2;
    var textX = (textBB.left + textBB.right) / 2;
    var textY = (textBB.top + textBB.bottom) / 2;
    var targetX = (x0 + x1) / 2;
    var targetY = (y0 + y1) / 2;
    var anchorX = 0;
    var anchorY = 0;

    var dir = isHorizontal ? dirSign(x1, x0) : dirSign(y0, y1);
    if (isHorizontal) {
        targetX = x1 - dir * textpad;
        anchorX = dir * extrapad;
    } else {
        targetY = y1 + dir * textpad;
        anchorY = -dir * extrapad;
    }

    return {
        textX: textX,
        textY: textY,
        targetX: targetX,
        targetY: targetY,
        anchorX: anchorX,
        anchorY: anchorY,
        scale: scale,
        rotate: rotate
    };
}