brush.extent = function()

in TestApplications/Web/js/lib/components/d3-3.4.13/src/svg/brush.js [350:395]

• 41 lines of code
• 26 McCabe index (conditional complexity)

  brush.extent = function(z) {
    var x0, x1, y0, y1, t;

    // Invert the pixel extent to data-space.
    if (!arguments.length) {
      if (x) {
        if (xExtentDomain) {
          x0 = xExtentDomain[0], x1 = xExtentDomain[1];
        } else {
          x0 = xExtent[0], x1 = xExtent[1];
          if (x.invert) x0 = x.invert(x0), x1 = x.invert(x1);
          if (x1 < x0) t = x0, x0 = x1, x1 = t;
        }
      }
      if (y) {
        if (yExtentDomain) {
          y0 = yExtentDomain[0], y1 = yExtentDomain[1];
        } else {
          y0 = yExtent[0], y1 = yExtent[1];
          if (y.invert) y0 = y.invert(y0), y1 = y.invert(y1);
          if (y1 < y0) t = y0, y0 = y1, y1 = t;
        }
      }
      return x && y ? [[x0, y0], [x1, y1]] : x ? [x0, x1] : y && [y0, y1];
    }

    // Scale the data-space extent to pixels.
    if (x) {
      x0 = z[0], x1 = z[1];
      if (y) x0 = x0[0], x1 = x1[0];
      xExtentDomain = [x0, x1];
      if (x.invert) x0 = x(x0), x1 = x(x1);
      if (x1 < x0) t = x0, x0 = x1, x1 = t;
      if (x0 != xExtent[0] || x1 != xExtent[1]) xExtent = [x0, x1]; // copy-on-write
    }
    if (y) {
      y0 = z[0], y1 = z[1];
      if (x) y0 = y0[1], y1 = y1[1];
      yExtentDomain = [y0, y1];
      if (y.invert) y0 = y(y0), y1 = y(y1);
      if (y1 < y0) t = y0, y0 = y1, y1 = t;
      if (y0 != yExtent[0] || y1 != yExtent[1]) yExtent = [y0, y1]; // copy-on-write
    }

    return brush;
  };