Function axis

d3-3.2.8/d3.js:7751–7836

(g)

  d3.svg.axis = function() {
    var scale = d3.scale.linear(), orient = d3_svg_axisDefaultOrient, tickMajorSize = 6, tickMinorSize = 6, tickEndSize = 6, tickPadding = 3, tickArguments_ = [ 10 ], tickValues = null, tickFormat_, tickSubdivide = 0;
    function axis(g) {
      g.each(function() {
        var g = d3.select(this);
        var ticks = tickValues == null ? scale.ticks ? scale.ticks.apply(scale, tickArguments_) : scale.domain() : tickValues, tickFormat = tickFormat_ == null ? scale.tickFormat ? scale.tickFormat.apply(scale, tickArguments_) : String : tickFormat_;
        var subticks = d3_svg_axisSubdivide(scale, ticks, tickSubdivide), subtick = g.selectAll(".tick.minor").data(subticks, String), subtickEnter = subtick.enter().insert("line", ".tick").attr("class", "tick minor").style("opacity", 1e-6), subtickExit = d3.transition(subtick.exit()).style("opacity", 1e-6).remove(), subtickUpdate = d3.transition(subtick).style("opacity", 1);
        var tick = g.selectAll(".tick.major").data(ticks, String), tickEnter = tick.enter().insert("g", ".domain").attr("class", "tick major").style("opacity", 1e-6), tickExit = d3.transition(tick.exit()).style("opacity", 1e-6).remove(), tickUpdate = d3.transition(tick).style("opacity", 1), tickTransform;
        var range = d3_scaleRange(scale), path = g.selectAll(".domain").data([ 0 ]), pathUpdate = (path.enter().append("path").attr("class", "domain"), 
        d3.transition(path));
        var scale1 = scale.copy(), scale0 = this.__chart__ || scale1;
        this.__chart__ = scale1;
        tickEnter.append("line");
        tickEnter.append("text");
        var lineEnter = tickEnter.select("line"), lineUpdate = tickUpdate.select("line"), text = tick.select("text").text(tickFormat), textEnter = tickEnter.select("text"), textUpdate = tickUpdate.select("text");
        switch (orient) {
         case "bottom":
          {
            tickTransform = d3_svg_axisX;
            subtickEnter.attr("y2", tickMinorSize);
            subtickUpdate.attr("x2", 0).attr("y2", tickMinorSize);
            lineEnter.attr("y2", tickMajorSize);
            textEnter.attr("y", Math.max(tickMajorSize, 0) + tickPadding);
            lineUpdate.attr("x2", 0).attr("y2", tickMajorSize);
            textUpdate.attr("x", 0).attr("y", Math.max(tickMajorSize, 0) + tickPadding);
            text.attr("dy", ".71em").style("text-anchor", "middle");
            pathUpdate.attr("d", "M" + range[0] + "," + tickEndSize + "V0H" + range[1] + "V" + tickEndSize);
            break;
          }

         case "top":
          {
            tickTransform = d3_svg_axisX;
            subtickEnter.attr("y2", -tickMinorSize);
            subtickUpdate.attr("x2", 0).attr("y2", -tickMinorSize);
            lineEnter.attr("y2", -tickMajorSize);
            textEnter.attr("y", -(Math.max(tickMajorSize, 0) + tickPadding));
            lineUpdate.attr("x2", 0).attr("y2", -tickMajorSize);
            textUpdate.attr("x", 0).attr("y", -(Math.max(tickMajorSize, 0) + tickPadding));
            text.attr("dy", "0em").style("text-anchor", "middle");
            pathUpdate.attr("d", "M" + range[0] + "," + -tickEndSize + "V0H" + range[1] + "V" + -tickEndSize);
            break;
          }

         case "left":
          {
            tickTransform = d3_svg_axisY;
            subtickEnter.attr("x2", -tickMinorSize);
            subtickUpdate.attr("x2", -tickMinorSize).attr("y2", 0);
            lineEnter.attr("x2", -tickMajorSize);
            textEnter.attr("x", -(Math.max(tickMajorSize, 0) + tickPadding));
            lineUpdate.attr("x2", -tickMajorSize).attr("y2", 0);
            textUpdate.attr("x", -(Math.max(tickMajorSize, 0) + tickPadding)).attr("y", 0);
            text.attr("dy", ".32em").style("text-anchor", "end");
            pathUpdate.attr("d", "M" + -tickEndSize + "," + range[0] + "H0V" + range[1] + "H" + -tickEndSize);
            break;
          }

         case "right":
          {