| 1 | /** |
| 2 | * @fileoverview DygraphOptions is responsible for parsing and returning information about options. |
| 3 | * |
| 4 | * Still tightly coupled to Dygraphs, we could remove some of that, you know. |
| 5 | */ |
| 6 | |
| 7 | "use strict"; |
| 8 | |
| 9 | /* |
| 10 | * Interesting member variables: |
| 11 | * dygraph_ - the graph. |
| 12 | * global - global attributes (common among all graphs, AIUI) |
| 13 | * user - attributes set by the user |
| 14 | * axes |
| 15 | * series - { seriesName -> { idx, yAxis, options } |
| 16 | * labels - used as mapping from index to series name. |
| 17 | */ |
| 18 | |
| 19 | /** |
| 20 | * @constructor |
| 21 | * |
| 22 | * This parses attributes into an object that can be easily queried. |
| 23 | * |
| 24 | * @param {Dyraph} dygraph The chart to which these options belong. |
| 25 | */ |
| 26 | var DygraphOptions = function(dygraph) { |
| 27 | this.dygraph_ = dygraph; |
| 28 | this.axes_ = []; |
| 29 | this.series_ = {}; |
| 30 | |
| 31 | // Once these two objects are initialized, you can call find(); |
| 32 | this.global_ = this.dygraph_.attrs_; |
| 33 | this.user_ = this.dygraph_.user_attrs_ || {}; |
| 34 | |
| 35 | this.highlightSeries_ = this.find("highlightSeriesOpts") || {}; |
| 36 | // Get a list of series names. |
| 37 | |
| 38 | var labels = this.find("labels"); |
| 39 | if (!labels) { |
| 40 | return; // -- can't do more for now, will parse after getting the labels. |
| 41 | }; |
| 42 | |
| 43 | this.reparseSeries(); |
| 44 | } |
| 45 | |
| 46 | DygraphOptions.prototype.reparseSeries = function() { |
| 47 | this.labels = this.find("labels").slice(1); |
| 48 | |
| 49 | this.axes_ = [ {} ]; // Always one axis at least. |
| 50 | this.series_ = {}; |
| 51 | |
| 52 | var axisId = 0; // 0-offset; there's always one. |
| 53 | // Go through once, add all the series, and for those with {} axis options, add a new axis. |
| 54 | for (var idx = 0; idx < this.labels.length; idx++) { |
| 55 | var seriesName = this.labels[idx]; |
| 56 | |
| 57 | var optionsForSeries = this.user_[seriesName] || {}; |
| 58 | var yAxis = 0; |
| 59 | |
| 60 | var axis = optionsForSeries["axis"]; |
| 61 | if (typeof(axis) == 'object') { |
| 62 | yAxis = ++axisId; |
| 63 | this.axes_[yAxis] = axis; |
| 64 | } |
| 65 | this.series_[seriesName] = { idx: idx, yAxis: yAxis, options : optionsForSeries }; |
| 66 | } |
| 67 | |
| 68 | // Go through one more time and assign series to an axis defined by another |
| 69 | // series, e.g. { 'Y1: { axis: {} }, 'Y2': { axis: 'Y1' } } |
| 70 | for (var idx = 0; idx < this.labels.length; idx++) { |
| 71 | var seriesName = this.labels[idx]; |
| 72 | var optionsForSeries = this.series_[seriesName]["options"]; |
| 73 | var axis = optionsForSeries["axis"]; |
| 74 | |
| 75 | if (typeof(axis) == 'string') { |
| 76 | if (!this.series_.hasOwnProperty(axis)) { |
| 77 | this.dygraph_.error("Series " + seriesName + " wants to share a y-axis with " + |
| 78 | "series " + axis + ", which does not define its own axis."); |
| 79 | return null; |
| 80 | } |
| 81 | this.series_[seriesName].yAxis = this.series_[axis].yAxis; |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | // This doesn't support reading from the 'x' axis, only 'y' and 'y2. |
| 86 | // Read from the global "axes" option. |
| 87 | if (this.user_.hasOwnProperty("axes")) { |
| 88 | var axis_opts = this.user_.axes; |
| 89 | |
| 90 | if (axis_opts.hasOwnProperty("y")) { |
| 91 | Dygraph.update(this.axes_[0], axis_opts.y); |
| 92 | } |
| 93 | |
| 94 | if (axis_opts.hasOwnProperty("y2")) { |
| 95 | this.axes_[1] = this.axes_[1] || {}; |
| 96 | Dygraph.update(this.axes_[1], axis_opts.y2); |
| 97 | } |
| 98 | } |
| 99 | }; |
| 100 | |
| 101 | DygraphOptions.prototype.find = function(name) { |
| 102 | if (this.user_.hasOwnProperty(name)) { |
| 103 | return this.user_[name]; |
| 104 | } |
| 105 | if (this.global_.hasOwnProperty(name)) { |
| 106 | return this.global_[name]; |
| 107 | } |
| 108 | return null; |
| 109 | } |
| 110 | |
| 111 | DygraphOptions.prototype.findForAxis = function(name, axis) { |
| 112 | var axisIdx = (axis == "y2" || axis == "y2" || axis == 1) ? 1 : 0; |
| 113 | |
| 114 | var axisOptions = this.axes_[axisIdx]; |
| 115 | if (axisOptions.hasOwnProperty(name)) { |
| 116 | return axisOptions[name]; |
| 117 | } |
| 118 | return this.find(name); |
| 119 | } |
| 120 | |
| 121 | DygraphOptions.prototype.findForSeries = function(name, series) { |
| 122 | // Honors indexes as series. |
| 123 | var seriesName = (typeof(series) == "number") ? this.labels[series] : series; |
| 124 | |
| 125 | if (seriesName === this.dygraph_.highlightSet_) { |
| 126 | if (this.highlightSeries_.hasOwnProperty(name)) { |
| 127 | return this.highlightSeries_[name]; |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | if (!this.series_.hasOwnProperty(seriesName)) { |
| 132 | throw "Unknown series: " + series; |
| 133 | } |
| 134 | |
| 135 | var seriesObj = this.series_[seriesName]; |
| 136 | var seriesOptions = seriesObj["options"]; |
| 137 | if (seriesOptions.hasOwnProperty(name)) { |
| 138 | return seriesOptions[name]; |
| 139 | } |
| 140 | |
| 141 | return this.findForAxis(name, seriesObj["yAxis"]); |
| 142 | } |
| 143 | |