JavaPosseRoundup · mtye · Feb 7, 2013 · Feb 1, 2013
diff --git a/commitsaction.js b/commitsaction.js
@@ -0,0 +1,30 @@
+$.getJSON("https://api.github.com/orgs/" + orgName + "/repos?callback=?", function(response) {
+  var allCommits = [];
+  var timelines = [];
+  response.data.forEach(function(repo, i, array) {
+    function gitSource(repo) {
+      return repo.url + "/commits?callback=?";
+    }
+    $.getJSON(gitSource(repo), function(response) {
+      var commits = response.data.map(function(r) {
+        return {
+          repo: repo.name,
+          message: r.commit.message,
+          authorDate: d3.time.format.iso.parse(r.commit.author.date),
+          committerEmail: r.commit.committer.email,
+          committerName: r.commit.committer.name,
+          commitDate: d3.time.format.iso.parse(r.commit.committer.date),
+          sha: r.sha
+        }
+      });
+      var timeline = {
+        repo: repo.name,
+        earliest: commits[commits.length - 1].commitDate,
+        latest: commits[0].commitDate
+      };
+      allCommits.push.apply(allCommits, commits);
+      timelines.push(timeline);
+      if (timelines.length == array.length) drawChart(allCommits, timelines);
+    });
+  });
+});
diff --git a/commitsbase.js b/commitsbase.js
@@ -0,0 +1,139 @@
+// Find the element where the commit timeline should be drawn
+var commits = d3.select("#commits");
+
+var orgName = commits.attr("orgName") || "JavaPosseRoundup";
+var startDate = commits.attr("startDate") || "";
+var leftRightPadding = commits.attr("left-right-padding") || 20;
+var topBottomPadding = commits.attr("top-bottom-padding") || 150;
+var width = commits.attr("width") || $(document).width() - leftRightPadding;
+var height = commits.attr("height") || $(window).height() - topBottomPadding;
+var leftMargin = commits.attr("left-margin") || 180;
+var rightMargin = commits.attr("right-margin") || 0;
+var topMargin = commits.attr("top-margin") || 20;
+var bottomMargin = commits.attr("bottom-margin") || 60;
+
+var w = width - leftMargin - rightMargin,
+    h = height - topMargin - bottomMargin;
+
+// Scales. Note the inverted domain for the y-scale: bigger is up!
+var x = d3.time.scale().rangeRound([0, w]),
+    y = d3.scale.ordinal().rangePoints([0, h], .5),
+    colors = d3.scale.category20();
+
+// Axes.
+var xAxis = d3.svg.axis().scale(x).tickSubdivide(true);
+var yAxis = d3.svg.axis().scale(y).tickSize(0).tickPadding(5).orient("left");
+
+// Add an SVG element with the desired dimensions and margin.
+var svg = commits.append("svg")
+    .attr("width", width)
+    .attr("height", height)
+  .append("g")
+    .attr("transform", "translate(" + leftMargin + "," + topMargin + ")");
+
+// Add the clip path.
+svg.append("clipPath")
+    .attr("id", "clip")
+  .append("rect")
+    .attr("width", w)
+    .attr("height", h);
+
+// Need something in the background absorb the mouse events!
+svg.append("rect")
+    .attr("width", w)
+    .attr("height", h)
+    .style("fill-opacity", ".0");
+
+function drawChart(allCommits, timelines) {
+
+  var tickHeight = height / (timelines.length * 4 + 1);
+
+  var earliestCommitDate = d3.min(timelines, function(d) { return d.earliest; });
+
+  var start = d3.time.format("%Y-%m-%d").parse(startDate) || earliestCommitDate;
+
+  x.domain([d3.time.day.floor(start), d3.time.day.ceil(new Date())]);
+
+  y.domain(timelines.map(function(t) { return t.repo; }));
+
+  // Add the x-axis.
+  svg.append("g")
+    .attr("class", "x axis")
+    .attr("transform", "translate(0," + (h + topMargin + tickHeight) + ")")
+    .call(xAxis);
+
+  // Add the y-axis.
+  svg.append("g")
+    .attr("class", "y axis")
+    .call(yAxis);
+
+  svg.selectAll(".commit")
+      .data(allCommits)
+    .enter().append("line")
+      .attr("class", "commit")
+      .attr("clip-path", "url(#clip)")
+      .attr("x1", function(d) { return x(d.commitDate); })
+      .attr("y1", function(d) { return Math.floor(y(d.repo)) - tickHeight; })
+      .attr("x2", function(d) { return x(d.commitDate); })
+      .attr("y2", function(d) { return Math.floor(y(d.repo)) + tickHeight; })
+      .style("stroke", function(d) { return colors(d.committerEmail); })
+      .on("mouseover", showCommitInfo);
+
+  svg.selectAll(".timeline")
+      .data(timelines)
+    .enter().append("line")
+      .attr("class", "timeline")
+      .attr("clip-path", "url(#clip)")
+      .attr("x1", function(d) { return x(d.earliest); })
+      .attr("y1", function(d) { return Math.floor(y(d.repo)); })
+      .attr("x2", function(d) { return x(d.latest); })
+      .attr("y2", function(d) { return Math.floor(y(d.repo)); });
+
+  svg.call(d3.behavior.zoom().x(x).on("zoom", zoom));
+
+  function zoom() {
+    svg.select(".x.axis").call(xAxis);
+    svg.selectAll(".commit")
+      .data(allCommits)
+      .attr("x1", function(d) { return x(d.commitDate); })
+      .attr("x2", function(d) { return x(d.commitDate); });
+    svg.selectAll(".timeline")
+      .data(timelines)
+      .attr("x1", function(d) { return x(d.earliest); })
+      .attr("x2", function(d) { return x(d.latest); });
+    svg.selectAll(".committer, .message")
+      .attr("x", function(d) { return x(d.commitDate); });
+  }
+
+  function showCommitInfo(d, i) {
+
+    var committer = svg.selectAll(".committer")
+      .data([d], function(d) { return d.sha; });
+
+    committer.enter().append("text")
+      .attr("class", "committer")
+      .attr("x", x(d.commitDate))
+      .attr("y", y(d.repo))
+      .attr("dx", -2)
+      .attr("dy", 2 * tickHeight + 5)
+      .attr("text-anchor", "end")
+      .style("fill", colors(d.committerEmail))
+      .text(d.committerName);
+
+    committer.exit().remove();
+
+    var message = svg.selectAll(".message")
+      .data([d], function(d) { return d.sha; });
+
+    message.enter().append("text")
+      .attr("class", "message")
+      .attr("x", x(d.commitDate))
+      .attr("y", y(d.repo))
+      .attr("dx", 2)
+      .attr("dy", 2 * tickHeight + 5)
+      .text(d.message);
+
+    message.exit().remove();
+  }
+
+}