Refactor interpolate tests for minimal loading.

package.json

@@ -31,7 +31,7 @@
     "jsdom": "~0.5.2"
   },
   "devDependencies": {
-    "smash": "~0.0.7",
+    "smash": "~0.0.8",
     "uglify-js": "2.2.x",
     "vows": "0.7.x"
   },

src/interpolate/array.js

+import "interpolate";
+
+d3.interpolateArray = d3_interpolateArray;
+
+function d3_interpolateArray(a, b) {
+  var x = [],
+      c = [],
+      na = a.length,
+      nb = b.length,
+      n0 = Math.min(a.length, b.length),
+      i;
+  for (i = 0; i < n0; ++i) x.push(d3_interpolate(a[i], b[i]));
+  for (; i < na; ++i) c[i] = a[i];
+  for (; i < nb; ++i) c[i] = b[i];
+  return function(t) {
+    for (i = 0; i < n0; ++i) c[i] = x[i](t);
+    return c;
+  };
+}

src/interpolate/hcl.js

+import "../color/hcl";
+
+d3.interpolateHcl = d3_interpolateHcl;
+
+function d3_interpolateHcl(a, b) {
+  a = d3.hcl(a);
+  b = d3.hcl(b);
+  var ah = a.h,
+      ac = a.c,
+      al = a.l,
+      bh = b.h - ah,
+      bc = b.c - ac,
+      bl = b.l - al;
+  if (bh > 180) bh -= 360; else if (bh < -180) bh += 360; // shortest path
+  return function(t) {
+    return d3_hcl_lab(ah + bh * t, ac + bc * t, al + bl * t) + "";
+  };
+}

src/interpolate/hsl.js

+import "../color/hsl";
+
+d3.interpolateHsl = d3_interpolateHsl;
+
+// interpolates HSL space, but outputs RGB string (for compatibility)
+
+function d3_interpolateHsl(a, b) {
+  a = d3.hsl(a);
+  b = d3.hsl(b);
+  var h0 = a.h,
+      s0 = a.s,
+      l0 = a.l,
+      h1 = b.h - h0,
+      s1 = b.s - s0,
+      l1 = b.l - l0;
+  if (h1 > 180) h1 -= 360; else if (h1 < -180) h1 += 360; // shortest path
+  return function(t) {
+    return d3_hsl_rgb(h0 + h1 * t, s0 + s1 * t, l0 + l1 * t) + "";
+  };
+}

src/interpolate/index.js

+import "array";
 import "ease";
+import "hcl";
+import "hsl";
 import "interpolate";
+import "lab";
+import "number";
+import "object";
+import "rgb";
+import "round";
+import "string";
+import "transform";
+import "uninterpolate";

src/interpolate/interpolate.js

 import "../color/color";
-import "../color/hcl";
-import "../color/hsl";
-import "../color/lab";
 import "../color/rgb";
-import "../math/transform";
+import "rgb";
+import "transform";
+import "object";
+import "array";
+import "number";
+import "string";
 
-d3.interpolate = function(a, b) {
+d3.interpolate = d3_interpolate;
+
+function d3_interpolate(a, b) {
   var i = d3.interpolators.length, f;
   while (--i >= 0 && !(f = d3.interpolators[i](a, b)));
   return f;
-};
-
-d3.interpolateNumber = function(a, b) {
-  b -= a;
-  return function(t) { return a + b * t; };
-};
-
-d3.interpolateRound = function(a, b) {
-  b -= a;
-  return function(t) { return Math.round(a + b * t); };
-};
-
-d3.interpolateString = function(a, b) {
-  var m, // current match
-      i, // current index
-      j, // current index (for coalescing)
-      s0 = 0, // start index of current string prefix
-      s1 = 0, // end index of current string prefix
-      s = [], // string constants and placeholders
-      q = [], // number interpolators
-      n, // q.length
-      o;
-
-  // Reset our regular expression!
-  d3_interpolate_number.lastIndex = 0;
-
-  // Find all numbers in b.
-  for (i = 0; m = d3_interpolate_number.exec(b); ++i) {
-    if (m.index) s.push(b.substring(s0, s1 = m.index));
-    q.push({i: s.length, x: m[0]});
-    s.push(null);
-    s0 = d3_interpolate_number.lastIndex;
-  }
-  if (s0 < b.length) s.push(b.substring(s0));
-
-  // Find all numbers in a.
-  for (i = 0, n = q.length; (m = d3_interpolate_number.exec(a)) && i < n; ++i) {
-    o = q[i];
-    if (o.x == m[0]) { // The numbers match, so coalesce.
-      if (o.i) {
-        if (s[o.i + 1] == null) { // This match is followed by another number.
-          s[o.i - 1] += o.x;
-          s.splice(o.i, 1);
-          for (j = i + 1; j < n; ++j) q[j].i--;
-        } else { // This match is followed by a string, so coalesce twice.
-          s[o.i - 1] += o.x + s[o.i + 1];
-          s.splice(o.i, 2);
-          for (j = i + 1; j < n; ++j) q[j].i -= 2;
-        }
-      } else {
-          if (s[o.i + 1] == null) { // This match is followed by another number.
-          s[o.i] = o.x;
-        } else { // This match is followed by a string, so coalesce twice.
-          s[o.i] = o.x + s[o.i + 1];
-          s.splice(o.i + 1, 1);
-          for (j = i + 1; j < n; ++j) q[j].i--;
-        }
-      }
-      q.splice(i, 1);
-      n--;
-      i--;
-    } else {
-      o.x = d3.interpolateNumber(parseFloat(m[0]), parseFloat(o.x));
-    }
-  }
-
-  // Remove any numbers in b not found in a.
-  while (i < n) {
-    o = q.pop();
-    if (s[o.i + 1] == null) { // This match is followed by another number.
-      s[o.i] = o.x;
-    } else { // This match is followed by a string, so coalesce twice.
-      s[o.i] = o.x + s[o.i + 1];
-      s.splice(o.i + 1, 1);
-    }
-    n--;
-  }
-
-  // Special optimization for only a single match.
-  if (s.length === 1) {
-    return s[0] == null ? q[0].x : function() { return b; };
-  }
-
-  // Otherwise, interpolate each of the numbers and rejoin the string.
-  return function(t) {
-    for (i = 0; i < n; ++i) s[(o = q[i]).i] = o.x(t);
-    return s.join("");
-  };
-};
-
-d3.interpolateTransform = function(a, b) {
-  var s = [], // string constants and placeholders
-      q = [], // number interpolators
-      n,
-      A = d3.transform(a),
-      B = d3.transform(b),
-      ta = A.translate,
-      tb = B.translate,
-      ra = A.rotate,
-      rb = B.rotate,
-      wa = A.skew,
-      wb = B.skew,
-      ka = A.scale,
-      kb = B.scale;
-
-  if (ta[0] != tb[0] || ta[1] != tb[1]) {
-    s.push("translate(", null, ",", null, ")");
-    q.push({i: 1, x: d3.interpolateNumber(ta[0], tb[0])}, {i: 3, x: d3.interpolateNumber(ta[1], tb[1])});
-  } else if (tb[0] || tb[1]) {
-    s.push("translate(" + tb + ")");
-  } else {
-    s.push("");
-  }
-
-  if (ra != rb) {
-    if (ra - rb > 180) rb += 360; else if (rb - ra > 180) ra += 360; // shortest path
-    q.push({i: s.push(s.pop() + "rotate(", null, ")") - 2, x: d3.interpolateNumber(ra, rb)});
-  } else if (rb) {
-    s.push(s.pop() + "rotate(" + rb + ")");
-  }
-
-  if (wa != wb) {
-    q.push({i: s.push(s.pop() + "skewX(", null, ")") - 2, x: d3.interpolateNumber(wa, wb)});
-  } else if (wb) {
-    s.push(s.pop() + "skewX(" + wb + ")");
-  }
-
-  if (ka[0] != kb[0] || ka[1] != kb[1]) {
-    n = s.push(s.pop() + "scale(", null, ",", null, ")");
-    q.push({i: n - 4, x: d3.interpolateNumber(ka[0], kb[0])}, {i: n - 2, x: d3.interpolateNumber(ka[1], kb[1])});
-  } else if (kb[0] != 1 || kb[1] != 1) {
-    s.push(s.pop() + "scale(" + kb + ")");
-  }
-
-  n = q.length;
-  return function(t) {
-    var i = -1, o;
-    while (++i < n) s[(o = q[i]).i] = o.x(t);
-    return s.join("");
-  };
-};
-
-d3.interpolateRgb = function(a, b) {
-  a = d3.rgb(a);
-  b = d3.rgb(b);
-  var ar = a.r,
-      ag = a.g,
-      ab = a.b,
-      br = b.r - ar,
-      bg = b.g - ag,
-      bb = b.b - ab;
-  return function(t) {
-    return "#"
-        + d3_rgb_hex(Math.round(ar + br * t))
-        + d3_rgb_hex(Math.round(ag + bg * t))
-        + d3_rgb_hex(Math.round(ab + bb * t));
-  };
-};
-
-// interpolates HSL space, but outputs RGB string (for compatibility)
-d3.interpolateHsl = function(a, b) {
-  a = d3.hsl(a);
-  b = d3.hsl(b);
-  var h0 = a.h,
-      s0 = a.s,
-      l0 = a.l,
-      h1 = b.h - h0,
-      s1 = b.s - s0,
-      l1 = b.l - l0;
-  if (h1 > 180) h1 -= 360; else if (h1 < -180) h1 += 360; // shortest path
-  return function(t) {
-    return d3_hsl_rgb(h0 + h1 * t, s0 + s1 * t, l0 + l1 * t) + "";
-  };
-};
-
-d3.interpolateLab = function(a, b) {
-  a = d3.lab(a);
-  b = d3.lab(b);
-  var al = a.l,
-      aa = a.a,
-      ab = a.b,
-      bl = b.l - al,
-      ba = b.a - aa,
-      bb = b.b - ab;
-  return function(t) {
-    return d3_lab_rgb(al + bl * t, aa + ba * t, ab + bb * t) + "";
-  };
-};
-
-d3.interpolateHcl = function(a, b) {
-  a = d3.hcl(a);
-  b = d3.hcl(b);
-  var ah = a.h,
-      ac = a.c,
-      al = a.l,
-      bh = b.h - ah,
-      bc = b.c - ac,
-      bl = b.l - al;
-  if (bh > 180) bh -= 360; else if (bh < -180) bh += 360; // shortest path
-  return function(t) {
-    return d3_hcl_lab(ah + bh * t, ac + bc * t, al + bl * t) + "";
-  };
-};
-
-d3.interpolateArray = function(a, b) {
-  var x = [],
-      c = [],
-      na = a.length,
-      nb = b.length,
-      n0 = Math.min(a.length, b.length),
-      i;
-  for (i = 0; i < n0; ++i) x.push(d3.interpolate(a[i], b[i]));
-  for (; i < na; ++i) c[i] = a[i];
-  for (; i < nb; ++i) c[i] = b[i];
-  return function(t) {
-    for (i = 0; i < n0; ++i) c[i] = x[i](t);
-    return c;
-  };
-};
-
-d3.interpolateObject = function(a, b) {
-  var i = {},
-      c = {},
-      k;
-  for (k in a) {
-    if (k in b) {
-      i[k] = d3_interpolateByName(k)(a[k], b[k]);
-    } else {
-      c[k] = a[k];
-    }
-  }
-  for (k in b) {
-    if (!(k in a)) {
-      c[k] = b[k];
-    }
-  }
-  return function(t) {
-    for (k in i) c[k] = i[k](t);
-    return c;
-  };
-};
-
-var d3_interpolate_number = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g;
+}
 
 function d3_interpolateByName(name) {
   return name == "transform"
-      ? d3.interpolateTransform
-      : d3.interpolate;
+      ? d3_interpolateTransform
+      : d3_interpolate;
 }
 
 d3.interpolators = [
-  d3.interpolateObject,
-  function(a, b) { return Array.isArray(b) && d3.interpolateArray(a, b); },
-  function(a, b) { return (typeof a === "string" || typeof b === "string") && d3.interpolateString(a + "", b + ""); },
-  function(a, b) { return (typeof b === "string" ? d3_rgb_names.has(b) || /^(#|rgb\(|hsl\()/.test(b) : b instanceof d3_Color) && d3.interpolateRgb(a, b); },
-  function(a, b) { return !isNaN(a = +a) && !isNaN(b = +b) && d3.interpolateNumber(a, b); }
+  d3_interpolateObject,
+  function(a, b) { return Array.isArray(b) && d3_interpolateArray(a, b); },
+  function(a, b) { return (typeof a === "string" || typeof b === "string") && d3_interpolateString(a + "", b + ""); },
+  function(a, b) { return (typeof b === "string" ? d3_rgb_names.has(b) || /^(#|rgb\(|hsl\()/.test(b) : b instanceof d3_Color) && d3_interpolateRgb(a, b); },
+  function(a, b) { return !isNaN(a = +a) && !isNaN(b = +b) && d3_interpolateNumber(a, b); }
 ];

src/interpolate/lab.js

+import "../color/lab";
+
+d3.interpolateLab = d3_interpolateLab;
+
+function d3_interpolateLab(a, b) {
+  a = d3.lab(a);
+  b = d3.lab(b);
+  var al = a.l,
+      aa = a.a,
+      ab = a.b,
+      bl = b.l - al,
+      ba = b.a - aa,
+      bb = b.b - ab;
+  return function(t) {
+    return d3_lab_rgb(al + bl * t, aa + ba * t, ab + bb * t) + "";
+  };
+}

src/interpolate/number.js

+d3.interpolateNumber = d3_interpolateNumber;
+
+function d3_interpolateNumber(a, b) {
+  b -= a;
+  return function(t) { return a + b * t; };
+}

src/interpolate/object.js

+import "interpolate";
+
+d3.interpolateObject = d3_interpolateObject;
+
+function d3_interpolateObject(a, b) {
+  var i = {},
+      c = {},
+      k;
+  for (k in a) {
+    if (k in b) {
+      i[k] = d3_interpolateByName(k)(a[k], b[k]);
+    } else {
+      c[k] = a[k];
+    }
+  }
+  for (k in b) {
+    if (!(k in a)) {
+      c[k] = b[k];
+    }
+  }
+  return function(t) {
+    for (k in i) c[k] = i[k](t);
+    return c;
+  };
+}

src/interpolate/rgb.js

+import "../color/rgb";
+
+d3.interpolateRgb = d3_interpolateRgb;
+
+function d3_interpolateRgb(a, b) {
+  a = d3.rgb(a);
+  b = d3.rgb(b);
+  var ar = a.r,
+      ag = a.g,
+      ab = a.b,
+      br = b.r - ar,
+      bg = b.g - ag,
+      bb = b.b - ab;
+  return function(t) {
+    return "#"
+        + d3_rgb_hex(Math.round(ar + br * t))
+        + d3_rgb_hex(Math.round(ag + bg * t))
+        + d3_rgb_hex(Math.round(ab + bb * t));
+  };
+}

src/interpolate/round.js

+d3.interpolateRound = d3_interpolateRound;
+
+function d3_interpolateRound(a, b) {
+  b -= a;
+  return function(t) { return Math.round(a + b * t); };
+}

src/interpolate/string.js

+import "number";
+
+d3.interpolateString = d3_interpolateString;
+
+function d3_interpolateString(a, b) {
+  var m, // current match
+      i, // current index
+      j, // current index (for coalescing)
+      s0 = 0, // start index of current string prefix
+      s1 = 0, // end index of current string prefix
+      s = [], // string constants and placeholders
+      q = [], // number interpolators
+      n, // q.length
+      o;
+
+  // Reset our regular expression!
+  d3_interpolate_number.lastIndex = 0;
+
+  // Find all numbers in b.
+  for (i = 0; m = d3_interpolate_number.exec(b); ++i) {
+    if (m.index) s.push(b.substring(s0, s1 = m.index));
+    q.push({i: s.length, x: m[0]});
+    s.push(null);
+    s0 = d3_interpolate_number.lastIndex;
+  }
+  if (s0 < b.length) s.push(b.substring(s0));
+
+  // Find all numbers in a.
+  for (i = 0, n = q.length; (m = d3_interpolate_number.exec(a)) && i < n; ++i) {
+    o = q[i];
+    if (o.x == m[0]) { // The numbers match, so coalesce.
+      if (o.i) {
+        if (s[o.i + 1] == null) { // This match is followed by another number.
+          s[o.i - 1] += o.x;
+          s.splice(o.i, 1);
+          for (j = i + 1; j < n; ++j) q[j].i--;
+        } else { // This match is followed by a string, so coalesce twice.
+          s[o.i - 1] += o.x + s[o.i + 1];
+          s.splice(o.i, 2);
+          for (j = i + 1; j < n; ++j) q[j].i -= 2;
+        }
+      } else {
+          if (s[o.i + 1] == null) { // This match is followed by another number.
+          s[o.i] = o.x;
+        } else { // This match is followed by a string, so coalesce twice.
+          s[o.i] = o.x + s[o.i + 1];
+          s.splice(o.i + 1, 1);
+          for (j = i + 1; j < n; ++j) q[j].i--;
+        }
+      }
+      q.splice(i, 1);
+      n--;
+      i--;
+    } else {
+      o.x = d3_interpolateNumber(parseFloat(m[0]), parseFloat(o.x));
+    }
+  }
+
+  // Remove any numbers in b not found in a.
+  while (i < n) {
+    o = q.pop();
+    if (s[o.i + 1] == null) { // This match is followed by another number.
+      s[o.i] = o.x;
+    } else { // This match is followed by a string, so coalesce twice.
+      s[o.i] = o.x + s[o.i + 1];
+      s.splice(o.i + 1, 1);
+    }
+    n--;
+  }
+
+  // Special optimization for only a single match.
+  if (s.length === 1) {
+    return s[0] == null ? q[0].x : function() { return b; };
+  }
+
+  // Otherwise, interpolate each of the numbers and rejoin the string.
+  return function(t) {
+    for (i = 0; i < n; ++i) s[(o = q[i]).i] = o.x(t);
+    return s.join("");
+  };
+}
+
+var d3_interpolate_number = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g;

src/interpolate/transform.js

+import "../math/transform";
+import "number";
+
+d3.interpolateTransform = d3_interpolateTransform;
+
+function d3_interpolateTransform(a, b) {
+  var s = [], // string constants and placeholders
+      q = [], // number interpolators
+      n,
+      A = d3_transform(a),
+      B = d3_transform(b),
+      ta = A.translate,
+      tb = B.translate,
+      ra = A.rotate,
+      rb = B.rotate,
+      wa = A.skew,
+      wb = B.skew,
+      ka = A.scale,
+      kb = B.scale;
+
+  if (ta[0] != tb[0] || ta[1] != tb[1]) {
+    s.push("translate(", null, ",", null, ")");
+    q.push({i: 1, x: d3_interpolateNumber(ta[0], tb[0])}, {i: 3, x: d3_interpolateNumber(ta[1], tb[1])});
+  } else if (tb[0] || tb[1]) {
+    s.push("translate(" + tb + ")");
+  } else {
+    s.push("");
+  }
+
+  if (ra != rb) {
+    if (ra - rb > 180) rb += 360; else if (rb - ra > 180) ra += 360; // shortest path
+    q.push({i: s.push(s.pop() + "rotate(", null, ")") - 2, x: d3_interpolateNumber(ra, rb)});
+  } else if (rb) {
+    s.push(s.pop() + "rotate(" + rb + ")");
+  }
+
+  if (wa != wb) {
+    q.push({i: s.push(s.pop() + "skewX(", null, ")") - 2, x: d3_interpolateNumber(wa, wb)});
+  } else if (wb) {