dataStack.js
5.3 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
var _util = require("zrender/lib/core/util");
var createHashMap = _util.createHashMap;
var each = _util.each;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
// (1) [Caution]: the logic is correct based on the premises:
// data processing stage is blocked in stream.
// See <module:echarts/stream/Scheduler#performDataProcessorTasks>
// (2) Only register once when import repeatly.
// Should be executed before after series filtered and before stack calculation.
function _default(ecModel) {
var stackInfoMap = createHashMap();
ecModel.eachSeries(function (seriesModel) {
var stack = seriesModel.get('stack'); // Compatibal: when `stack` is set as '', do not stack.
if (stack) {
var stackInfoList = stackInfoMap.get(stack) || stackInfoMap.set(stack, []);
var data = seriesModel.getData();
var stackInfo = {
// Used for calculate axis extent automatically.
stackResultDimension: data.getCalculationInfo('stackResultDimension'),
stackedOverDimension: data.getCalculationInfo('stackedOverDimension'),
stackedDimension: data.getCalculationInfo('stackedDimension'),
stackedByDimension: data.getCalculationInfo('stackedByDimension'),
isStackedByIndex: data.getCalculationInfo('isStackedByIndex'),
data: data,
seriesModel: seriesModel
}; // If stacked on axis that do not support data stack.
if (!stackInfo.stackedDimension || !(stackInfo.isStackedByIndex || stackInfo.stackedByDimension)) {
return;
}
stackInfoList.length && data.setCalculationInfo('stackedOnSeries', stackInfoList[stackInfoList.length - 1].seriesModel);
stackInfoList.push(stackInfo);
}
});
stackInfoMap.each(calculateStack);
}
function calculateStack(stackInfoList) {
each(stackInfoList, function (targetStackInfo, idxInStack) {
var resultVal = [];
var resultNaN = [NaN, NaN];
var dims = [targetStackInfo.stackResultDimension, targetStackInfo.stackedOverDimension];
var targetData = targetStackInfo.data;
var isStackedByIndex = targetStackInfo.isStackedByIndex; // Should not write on raw data, because stack series model list changes
// depending on legend selection.
var newData = targetData.map(dims, function (v0, v1, dataIndex) {
var sum = targetData.get(targetStackInfo.stackedDimension, dataIndex); // Consider `connectNulls` of line area, if value is NaN, stackedOver
// should also be NaN, to draw a appropriate belt area.
if (isNaN(sum)) {
return resultNaN;
}
var byValue;
var stackedDataRawIndex;
if (isStackedByIndex) {
stackedDataRawIndex = targetData.getRawIndex(dataIndex);
} else {
byValue = targetData.get(targetStackInfo.stackedByDimension, dataIndex);
} // If stackOver is NaN, chart view will render point on value start.
var stackedOver = NaN;
for (var j = idxInStack - 1; j >= 0; j--) {
var stackInfo = stackInfoList[j]; // Has been optimized by inverted indices on `stackedByDimension`.
if (!isStackedByIndex) {
stackedDataRawIndex = stackInfo.data.rawIndexOf(stackInfo.stackedByDimension, byValue);
}
if (stackedDataRawIndex >= 0) {
var val = stackInfo.data.getByRawIndex(stackInfo.stackResultDimension, stackedDataRawIndex); // Considering positive stack, negative stack and empty data
if (sum >= 0 && val > 0 || // Positive stack
sum <= 0 && val < 0 // Negative stack
) {
sum += val;
stackedOver = val;
break;
}
}
}
resultVal[0] = sum;
resultVal[1] = stackedOver;
return resultVal;
});
targetData.hostModel.setData(newData); // Update for consequent calculation
targetStackInfo.data = newData;
});
}
module.exports = _default;