Update c3.min.js

c3.js

@@ -1042,6 +1042,8 @@
             zoom_onzoom: function () {},
             zoom_onzoomstart: function () {},
             zoom_onzoomend: function () {},
+            zoom_x_min: undefined,
+            zoom_x_max: undefined,
             interaction_enabled: true,
             onmouseover: function () {},
             onmouseout: function () {},
@@ -1579,14 +1581,16 @@
         return $$.x.domain();
     };
     c3_chart_internal_fn.trimXDomain = function (domain) {
-        var $$ = this;
-        if (domain[0] <= $$.orgXDomain[0]) {
-            domain[1] = +domain[1] + ($$.orgXDomain[0] - domain[0]);
-            domain[0] = $$.orgXDomain[0];
+        var $$ = this, config = $$.config, d3 = $$.d3;
+        var min = d3.min([$$.orgXDomain[0], config.zoom_x_min]);
+        var max = d3.max([$$.orgXDomain[1], config.zoom_x_max]);
+        if (domain[0] <= min) {
+            domain[1] = +domain[1] + (min - domain[0]);
+            domain[0] = min;
         }
-        if ($$.orgXDomain[1] <= domain[1]) {
-            domain[0] = +domain[0] - (domain[1] - $$.orgXDomain[1]);
-            domain[1] = $$.orgXDomain[1];
+        if (max <= domain[1]) {
+            domain[0] = +domain[0] - (domain[1] - max);
+            domain[1] = max;
         }
         return domain;
     };
@@ -6023,6 +6027,38 @@
         $$.redraw({withUpdateXDomain: true});
     };
 
+    c3_chart_fn.zoom.max = function (max) {
+        var $$ = this.internal, config = $$.config, d3 = $$.d3;
+        if (max === 0 || max) {
+            config.zoom_x_max = d3.max([$$.orgXDomain[1], max]);
+        }
+        else {
+            return config.zoom_x_max;
+        }
+    };
+
+    c3_chart_fn.zoom.min = function (min) {
+        var $$ = this.internal, config = $$.config, d3 = $$.d3;
+        if (min === 0 || min) {
+            config.zoom_x_min = d3.min([$$.orgXDomain[0], min]);
+        }
+        else {
+            return config.zoom_x_min;
+        }
+    };
+
+    c3_chart_fn.zoom.range = function (range) {
+        if (arguments.length) {
+            if (isDefined(range.max)) { this.domain.max(range.max); }
+            if (isDefined(range.min)) { this.domain.min(range.min); }
+        } else {
+            return {
+                max: this.domain.max(),
+                min: this.domain.min()
+            };
+        }
+    };
+
     c3_chart_fn.load = function (args) {
         var $$ = this.internal, config = $$.config;
         // update xs if specified

src/api.zoom.js

@@ -20,3 +20,35 @@ c3_chart_fn.unzoom = function () {
     $$.brush.clear().update();
     $$.redraw({withUpdateXDomain: true});
 };
+
+c3_chart_fn.zoom.max = function (max) {
+    var $$ = this.internal, config = $$.config, d3 = $$.d3;
+    if (max === 0 || max) {
+        config.zoom_x_max = d3.max([$$.orgXDomain[1], max]);
+    }
+    else {
+        return config.zoom_x_max;
+    }
+};
+
+c3_chart_fn.zoom.min = function (min) {
+    var $$ = this.internal, config = $$.config, d3 = $$.d3;
+    if (min === 0 || min) {
+        config.zoom_x_min = d3.min([$$.orgXDomain[0], min]);
+    }
+    else {
+        return config.zoom_x_min;
+    }
+};
+
+c3_chart_fn.zoom.range = function (range) {
+    if (arguments.length) {
+        if (isDefined(range.max)) { this.domain.max(range.max); }
+        if (isDefined(range.min)) { this.domain.min(range.min); }
+    } else {
+        return {
+            max: this.domain.max(),
+            min: this.domain.min()
+        };
+    }
+};

src/config.js

@@ -15,6 +15,8 @@ c3_chart_internal_fn.getDefaultConfig = function () {
         zoom_onzoom: function () {},
         zoom_onzoomstart: function () {},
         zoom_onzoomend: function () {},
+        zoom_x_min: undefined,
+        zoom_x_max: undefined,
         interaction_enabled: true,
         onmouseover: function () {},
         onmouseout: function () {},

src/domain.js

@@ -221,14 +221,16 @@ c3_chart_internal_fn.updateXDomain = function (targets, withUpdateXDomain, withU
     return $$.x.domain();
 };
 c3_chart_internal_fn.trimXDomain = function (domain) {
-    var $$ = this;
-    if (domain[0] <= $$.orgXDomain[0]) {
-        domain[1] = +domain[1] + ($$.orgXDomain[0] - domain[0]);
-        domain[0] = $$.orgXDomain[0];
-    }
-    if ($$.orgXDomain[1] <= domain[1]) {
-        domain[0] = +domain[0] - (domain[1] - $$.orgXDomain[1]);
-        domain[1] = $$.orgXDomain[1];
+    var $$ = this, config = $$.config, d3 = $$.d3;
+    var min = d3.min([$$.orgXDomain[0], config.zoom_x_min]);
+    var max = d3.max([$$.orgXDomain[1], config.zoom_x_max]);
+    if (domain[0] <= min) {
+        domain[1] = +domain[1] + (min - domain[0]);
+        domain[0] = min;
+    }
+    if (max <= domain[1]) {
+        domain[0] = +domain[0] - (domain[1] - max);
+        domain[1] = max;
     }
     return domain;
 };