Add axis.x.min and axis.x.max - #74

c3.js

@@ -89,6 +89,8 @@
             __axis_x_tick_format = getConfig(['axis', 'x', 'tick', 'format'], null),
             __axis_x_tick_culling = getConfig(['axis', 'x', 'tick', 'culling'], __axis_x_type === 'categorized' ? false : true),
             __axis_x_tick_count = getConfig(['axis', 'x', 'tick', 'count'], 10),
+            __axis_x_max = getConfig(['axis', 'x', 'max'], null),
+            __axis_x_min = getConfig(['axis', 'x', 'min'], null),
             __axis_x_default = getConfig(['axis', 'x', 'default'], null),
             __axis_x_label = getConfig(['axis', 'x', 'label'], null),
             __axis_y_max = getConfig(['axis', 'y', 'max'], null),
@@ -872,10 +874,10 @@
             return isSub || currentDiff === 0 ? 1 : orgDiff / currentDiff;
         }
         function getXDomainMin(targets) {
-            return d3.min(targets, function (t) { return d3.min(t.values, function (v) { return v.x; }); });
+            return __axis_x_min ? __axis_x_min : d3.min(targets, function (t) { return d3.min(t.values, function (v) { return v.x; }); });
         }
         function getXDomainMax(targets) {
-            return d3.max(targets, function (t) { return d3.max(t.values, function (v) { return v.x; }); });
+            return __axis_x_max ? __axis_x_max : d3.max(targets, function (t) { return d3.max(t.values, function (v) { return v.x; }); });
         }
         function getXDomainPadding(targets, domain) {
             var firstX = domain[0], lastX = domain[1], diff = Math.abs(firstX - lastX), maxDataCount, padding;
@@ -3055,7 +3057,7 @@
         function updateLegend(targets, options) {
             var ids = getTargetIds(targets), l;
             var xForLegend, xForLegendText, xForLegendRect, yForLegend, yForLegendText, yForLegendRect;
-            var paddingTop = 4, paddingRight = 26, maxWidth, maxHeight, posMin = 10;
+            var paddingTop = 4, paddingRight = 26, maxWidth = 0, maxHeight = 0, posMin = 10;
             var totalLength = 0, offsets = {}, widths = {}, heights = {}, margins = {}, steps = {}, step = 0;
             var withTransition;