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mbostockmbostock
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Add two stream implementations.
1 parent 6994640 commit 0dce022

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‎src/geo/stream-buffer.js‎

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function d3_geo_streamBuffer() {
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this._buffer = [];
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this._point = d3_geo_pathCircle(4.5);
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}
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var d3_geo_streamBufferPrototype = {
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point: d3_geo_streamBufferPoint,
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// While inside a line, override point to moveTo then lineTo.
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lineStart: function() { this.point = d3_geo_streamBufferPointLineStart; },
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lineEnd: d3_geo_streamBufferLineEnd,
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// While inside a polygon, override lineEnd to closePath.
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polygonStart: function() { this.lineEnd = d3_geo_streamBufferLineEndPolygon; },
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polygonEnd: function() { this.lineEnd = d3_geo_streamBufferLineEnd; },
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toString: function() {
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var s = this._buffer.join("");
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this._buffer = [];
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return s;
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}
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}
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function d3_geo_streamBufferPoint(x, y) {
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this._buffer.push("M", x, ",", y, this._point);
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}
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function d3_geo_streamBufferPointLineStart(x, y) {
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this._buffer.push("M", x, ",", y);
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this.point = d3_geo_streamBufferPointLine;
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}
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function d3_geo_streamBufferPointLine(x, y) {
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this._buffer.push("L", x, ",", y);
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}
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function d3_geo_streamBufferLineEnd() {
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this.point = d3_geo_streamBufferPoint;
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}
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function d3_geo_streamBufferLineEndPolygon() {
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this._buffer.push("Z");
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}

‎src/geo/stream-context.js‎

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function d3_geo_streamContext() {
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this._pointRadius = 4.5;
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}
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var d3_geo_streamContextPrototype = {
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point: d3_geo_streamContextPoint,
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// While inside a line, override point to moveTo then lineTo.
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lineStart: function() { this.point = d3_geo_streamContextPointLineStart; },
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lineEnd: d3_geo_streamContextLineEnd,
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// While inside a polygon, override lineEnd to closePath.
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polygonStart: function() { this.lineEnd = d3_geo_streamContextLineEndPolygon; },
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polygonEnd: function() { this.lineEnd = d3_geo_streamContextLineEnd; }
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}
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function d3_geo_streamContextPoint(x, y) {
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this._context.moveTo(x, y);
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this._context.arc(x, y, this._pointRadius, 0, 2 * π);
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}
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function d3_geo_streamContextPointLineStart(x, y) {
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this._context.moveTo(x, y);
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this.point = d3_geo_streamContextPointLine;
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}
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function d3_geo_streamContextPointLine(x, y) {
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this._context.lineTo(x, y);
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}
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function d3_geo_streamContextLineEnd() {
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this.point = d3_geo_streamContextPoint;
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}
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function d3_geo_streamContextLineEndPolygon() {
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this._context.closePath();
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}

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