{"action":"created","comment":{"url":"https://api.github.com/repos/palantir/plottable/pulls/comments/30931648","id":30931648,"diff_hunk":"@@ -137,26 +135,27 @@ export module Plots {\n         return;\n       }\n \n-      var orientation = this._isVertical ? \"vertical\" : \"horizontal\";\n-      var keyAccessor = StackedPlotUtils.keyAccessor(this, orientation);\n-      var valueAccessor = StackedPlotUtils.valueAccessor(this, orientation);\n-      var datasetKeys = this._datasetKeysInOrder;\n-      var keyToPlotDatasetKey = this._key2PlotDatasetKey;\n-      var filter = this._filterForProperty(this._isVertical ? \"y\" : \"x\");\n+      var datasets = this.datasets();\n+      var keyAccessor = this.x().accessor;\n+      var valueAccessor = this.y().accessor;\n+      var filter = this._filterForProperty(\"y\");\n \n-      StackedPlotUtils.checkSameDomainForStacks(keyAccessor, datasetKeys, keyToPlotDatasetKey);\n+      this._checkSameDomain(datasets, keyAccessor);\n+      this._stackOffsets = Utils.Stacked.computeStackOffsets(datasets, keyAccessor, valueAccessor);\n+      this._stackedExtent = Utils.Stacked.computeStackExtent(datasets, keyAccessor, valueAccessor, this._stackOffsets, filter);\n+    }\n \n-      var stackOffsets = StackedPlotUtils.computeStackOffsets.call(this, keyAccessor, valueAccessor, datasetKeys, keyToPlotDatasetKey);\n+    private _checkSameDomain(datasets: Dataset[], keyAccessor: Accessor<any>) {\n+      var keySets = datasets.map((dataset) => {\n+        return d3.set(dataset.data().map((datum, i) => keyAccessor(datum, i, dataset).toString())).values();\n+      });\n+      var domainKeys = Utils.Stacked.getDomainKeys(datasets, keyAccessor);","path":"src/components/plots/stackedAreaPlot.ts","position":51,"original_position":51,"commit_id":"45cac9d5da38f14753068a29f06d0f8312be7f39","original_commit_id":"45cac9d5da38f14753068a29f06d0f8312be7f39","user":{"login":"bluong","id":1448299,"avatar_url":"https://avatars.githubusercontent.com/u/1448299?v=3","gravatar_id":"","url":"https://api.github.com/users/bluong","html_url":"https://github.com/bluong","followers_url":"https://api.github.com/users/bluong/followers","following_url":"https://api.github.com/users/bluong/following{/other_user}","gists_url":"https://api.github.com/users/bluong/gists{/gist_id}","starred_url":"https://api.github.com/users/bluong/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/bluong/subscriptions","organizations_url":"https://api.github.com/users/bluong/orgs","repos_url":"https://api.github.com/users/bluong/repos","events_url":"https://api.github.com/users/bluong/events{/privacy}","received_events_url":"https://api.github.com/users/bluong/received_events","type":"User","site_admin":false},"body":"I'm unsure if this warrants making an endpoint for.  We can just calculate it here","created_at":"2015-05-22T21:23:14Z","updated_at":"2015-05-22T21:23:14Z","html_url":"https://github.com/palantir/plottable/pull/2146#discussion_r30931648","pull_request_url":"https://api.github.com/repos/palantir/plottable/pulls/2146","_links":{"self":{"href":"https://api.github.com/repos/palantir/plottable/pulls/comments/30931648"},"html":{"href":"https://github.com/palantir/plottable/pull/2146#discussion_r30931648"},"pull_request":{"href":"https://api.github.com/repos/palantir/plottable/pulls/2146"}}},"pull_request":{"url":"https://api.github.com/repos/palantir/plottable/pulls/2146","id":36055883,"html_url":"https://github.com/palantir/plottable/pull/2146","diff_url":"https://github.com/palantir/plottable/pull/2146.diff","patch_url":"https://github.com/palantir/plottable/pull/2146.patch","issue_url":"https://api.github.com/repos/palantir/plottable/issues/2146","number":2146,"state":"open","locked":false,"title":"Stacked plot refactor","user":{"login":"aicioara","id":3248682,"avatar_url":"https://avatars.githubusercontent.com/u/3248682?v=3","gravatar_id":"","url":"https://api.github.com/users/aicioara","html_url":"https://github.com/aicioara","followers_url":"https://api.github.com/users/aicioara/followers","following_url":"https://api.github.com/users/aicioara/following{/other_user}","gists_url":"https://api.github.com/users/aicioara/gists{/gist_id}","starred_url":"https://api.github.com/users/aicioara/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/aicioara/subscriptions","organizations_url":"https://api.github.com/users/aicioara/orgs","repos_url":"https://api.github.com/users/aicioara/repos","events_url":"https://api.github.com/users/aicioara/events{/privacy}","received_events_url":"https://api.github.com/users/aicioara/received_events","type":"User","site_admin":false},"body":"Closes #2104 \r\nWe decided to separate functionality from prettiness of the code here #2091, so this is a followup. In particular, after the `PlotMetadata` was removed in #2114, we could do the following:\r\n- Modularize the utils a bit more. Make them testable\r\n- Add documentation on the newly added methods\r\n- Add tests\r\n- Move `StackedPlotUtils` in the `Utils` library\r\n\r\nQE notes: \r\nThe functionality should not have been affected at all. Try seeing if you can still use the stacked plot and stacked area plot the expected way. There is no particular area to concentrate on, because the entire code of stacking has been changed. \r\n\r\nNew issue discovered: #2145 Not covered here because it is known behavior (pre v0.54), it looks like a new feature and it is out of the scope of this PR.\r\n**Edit:** Not actually an issue, and updated test coverage to account for the 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