First commit.

Signed-off-by: Chen Xiao <abigwc@gmail.com>

client/node_modules/d3-geo/src/projection/fit.js

@@ -0,0 +1,47 @@
+import {default as geoStream} from "../stream.js";
+import boundsStream from "../path/bounds.js";
+
+function fit(projection, fitBounds, object) {
+  var clip = projection.clipExtent && projection.clipExtent();
+  projection.scale(150).translate([0, 0]);
+  if (clip != null) projection.clipExtent(null);
+  geoStream(object, projection.stream(boundsStream));
+  fitBounds(boundsStream.result());
+  if (clip != null) projection.clipExtent(clip);
+  return projection;
+}
+
+export function fitExtent(projection, extent, object) {
+  return fit(projection, function(b) {
+    var w = extent[1][0] - extent[0][0],
+        h = extent[1][1] - extent[0][1],
+        k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
+        x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
+        y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;
+    projection.scale(150 * k).translate([x, y]);
+  }, object);
+}
+
+export function fitSize(projection, size, object) {
+  return fitExtent(projection, [[0, 0], size], object);
+}
+
+export function fitWidth(projection, width, object) {
+  return fit(projection, function(b) {
+    var w = +width,
+        k = w / (b[1][0] - b[0][0]),
+        x = (w - k * (b[1][0] + b[0][0])) / 2,
+        y = -k * b[0][1];
+    projection.scale(150 * k).translate([x, y]);
+  }, object);
+}
+
+export function fitHeight(projection, height, object) {
+  return fit(projection, function(b) {
+    var h = +height,
+        k = h / (b[1][1] - b[0][1]),
+        x = -k * b[0][0],
+        y = (h - k * (b[1][1] + b[0][1])) / 2;
+    projection.scale(150 * k).translate([x, y]);
+  }, object);
+}