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/*
* 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.
*/
/* global Float32Array */
import * as zrUtil from 'zrender/src/core/util';
import {parsePercent} from '../util/number';
import {isDimensionStacked} from '../data/helper/dataStackHelper';
import createRenderPlanner from '../chart/helper/createRenderPlanner';
var STACK_PREFIX = '__ec_stack_';
var LARGE_BAR_MIN_WIDTH = 0.5;
var LargeArr = typeof Float32Array !== 'undefined' ? Float32Array : Array;
function getSeriesStackId(seriesModel) {
return seriesModel.get('stack') || STACK_PREFIX + seriesModel.seriesIndex;
}
function getAxisKey(axis) {
return axis.dim + axis.index;
}
/**
* @param {Object} opt
* @param {module:echarts/coord/Axis} opt.axis Only support category axis currently.
* @param {number} opt.count Positive interger.
* @param {number} [opt.barWidth]
* @param {number} [opt.barMaxWidth]
* @param {number} [opt.barMinWidth]
* @param {number} [opt.barGap]
* @param {number} [opt.barCategoryGap]
* @return {Object} {width, offset, offsetCenter} If axis.type is not 'category', return undefined.
*/
export function getLayoutOnAxis(opt) {
var params = [];
var baseAxis = opt.axis;
var axisKey = 'axis0';
if (baseAxis.type !== 'category') {
return;
}
var bandWidth = baseAxis.getBandWidth();
for (var i = 0; i < opt.count || 0; i++) {
params.push(zrUtil.defaults({
bandWidth: bandWidth,
axisKey: axisKey,
stackId: STACK_PREFIX + i
}, opt));
}
var widthAndOffsets = doCalBarWidthAndOffset(params);
var result = [];
for (var i = 0; i < opt.count; i++) {
var item = widthAndOffsets[axisKey][STACK_PREFIX + i];
item.offsetCenter = item.offset + item.width / 2;
result.push(item);
}
return result;
}
export function prepareLayoutBarSeries(seriesType, ecModel) {
var seriesModels = [];
ecModel.eachSeriesByType(seriesType, function (seriesModel) {
// Check series coordinate, do layout for cartesian2d only
if (isOnCartesian(seriesModel) && !isInLargeMode(seriesModel)) {
seriesModels.push(seriesModel);
}
});
return seriesModels;
}
/**
* Map from (baseAxis.dim + '_' + baseAxis.index) to min gap of two adjacent
* values.
* This works for time axes, value axes, and log axes.
* For a single time axis, return value is in the form like
* {'x_0': [1000000]}.
* The value of 1000000 is in milliseconds.
*/
function getValueAxesMinGaps(barSeries) {
/**
* Map from axis.index to values.
* For a single time axis, axisValues is in the form like
* {'x_0': [1495555200000, 1495641600000, 1495728000000]}.
* Items in axisValues[x], e.g. 1495555200000, are time values of all
* series.
*/
var axisValues = {};
zrUtil.each(barSeries, function (seriesModel) {
var cartesian = seriesModel.coordinateSystem;
var baseAxis = cartesian.getBaseAxis();
if (baseAxis.type !== 'time' && baseAxis.type !== 'value') {
return;
}
var data = seriesModel.getData();
var key = baseAxis.dim + '_' + baseAxis.index;
var dim = data.mapDimension(baseAxis.dim);
for (var i = 0, cnt = data.count(); i < cnt; ++i) {
var value = data.get(dim, i);
if (!axisValues[key]) {
// No previous data for the axis
axisValues[key] = [value];
}
else {
// No value in previous series
axisValues[key].push(value);
}
// Ignore duplicated time values in the same axis
}
});
var axisMinGaps = [];
for (var key in axisValues) {
if (axisValues.hasOwnProperty(key)) {
var valuesInAxis = axisValues[key];
if (valuesInAxis) {
// Sort axis values into ascending order to calculate gaps
valuesInAxis.sort(function (a, b) {
return a - b;
});
var min = null;
for (var j = 1; j < valuesInAxis.length; ++j) {
var delta = valuesInAxis[j] - valuesInAxis[j - 1];
if (delta > 0) {
// Ignore 0 delta because they are of the same axis value
min = min === null ? delta : Math.min(min, delta);
}
}
// Set to null if only have one data
axisMinGaps[key] = min;
}
}
}
return axisMinGaps;
}
export function makeColumnLayout(barSeries) {
var axisMinGaps = getValueAxesMinGaps(barSeries);
var seriesInfoList = [];
zrUtil.each(barSeries, function (seriesModel) {
var cartesian = seriesModel.coordinateSystem;
var baseAxis = cartesian.getBaseAxis();
var axisExtent = baseAxis.getExtent();
var bandWidth;
if (baseAxis.type === 'category') {
bandWidth = baseAxis.getBandWidth();
}
else if (baseAxis.type === 'value' || baseAxis.type === 'time') {
var key = baseAxis.dim + '_' + baseAxis.index;
var minGap = axisMinGaps[key];
var extentSpan = Math.abs(axisExtent[1] - axisExtent[0]);
var scale = baseAxis.scale.getExtent();
var scaleSpan = Math.abs(scale[1] - scale[0]);
bandWidth = minGap
? extentSpan / scaleSpan * minGap
: extentSpan; // When there is only one data value
}
else {
var data = seriesModel.getData();
bandWidth = Math.abs(axisExtent[1] - axisExtent[0]) / data.count();
}
var barWidth = parsePercent(
seriesModel.get('barWidth'), bandWidth
);
var barMaxWidth = parsePercent(
seriesModel.get('barMaxWidth'), bandWidth
);
var barMinWidth = parsePercent(
// barMinWidth by default is 1 in cartesian. Because in value axis,
// the auto-calculated bar width might be less than 1.
seriesModel.get('barMinWidth') || 1, bandWidth
);
var barGap = seriesModel.get('barGap');
var barCategoryGap = seriesModel.get('barCategoryGap');
seriesInfoList.push({
bandWidth: bandWidth,
barWidth: barWidth,
barMaxWidth: barMaxWidth,
barMinWidth: barMinWidth,
barGap: barGap,
barCategoryGap: barCategoryGap,
axisKey: getAxisKey(baseAxis),
stackId: getSeriesStackId(seriesModel)
});
});
return doCalBarWidthAndOffset(seriesInfoList);
}
function doCalBarWidthAndOffset(seriesInfoList) {
// Columns info on each category axis. Key is cartesian name
var columnsMap = {};
zrUtil.each(seriesInfoList, function (seriesInfo, idx) {
var axisKey = seriesInfo.axisKey;
var bandWidth = seriesInfo.bandWidth;
var columnsOnAxis = columnsMap[axisKey] || {
bandWidth: bandWidth,
remainedWidth: bandWidth,
autoWidthCount: 0,
categoryGap: '20%',
gap: '30%',
stacks: {}
};
var stacks = columnsOnAxis.stacks;
columnsMap[axisKey] = columnsOnAxis;
var stackId = seriesInfo.stackId;
if (!stacks[stackId]) {
columnsOnAxis.autoWidthCount++;
}
stacks[stackId] = stacks[stackId] || {
width: 0,
maxWidth: 0
};
// Caution: In a single coordinate system, these barGrid attributes
// will be shared by series. Consider that they have default values,
// only the attributes set on the last series will work.
// Do not change this fact unless there will be a break change.
var barWidth = seriesInfo.barWidth;
if (barWidth && !stacks[stackId].width) {
// See #6312, do not restrict width.
stacks[stackId].width = barWidth;
barWidth = Math.min(columnsOnAxis.remainedWidth, barWidth);
columnsOnAxis.remainedWidth -= barWidth;
}
var barMaxWidth = seriesInfo.barMaxWidth;
barMaxWidth && (stacks[stackId].maxWidth = barMaxWidth);
var barMinWidth = seriesInfo.barMinWidth;
barMinWidth && (stacks[stackId].minWidth = barMinWidth);
var barGap = seriesInfo.barGap;
(barGap != null) && (columnsOnAxis.gap = barGap);
var barCategoryGap = seriesInfo.barCategoryGap;
(barCategoryGap != null) && (columnsOnAxis.categoryGap = barCategoryGap);
});
var result = {};
zrUtil.each(columnsMap, function (columnsOnAxis, coordSysName) {
result[coordSysName] = {};
var stacks = columnsOnAxis.stacks;
var bandWidth = columnsOnAxis.bandWidth;
var categoryGap = parsePercent(columnsOnAxis.categoryGap, bandWidth);
var barGapPercent = parsePercent(columnsOnAxis.gap, 1);
var remainedWidth = columnsOnAxis.remainedWidth;
var autoWidthCount = columnsOnAxis.autoWidthCount;
var autoWidth = (remainedWidth - categoryGap)
/ (autoWidthCount + (autoWidthCount - 1) * barGapPercent);
autoWidth = Math.max(autoWidth, 0);
// Find if any auto calculated bar exceeded maxBarWidth
zrUtil.each(stacks, function (column) {
var maxWidth = column.maxWidth;
var minWidth = column.minWidth;
if (!column.width) {
var finalWidth = autoWidth;
if (maxWidth && maxWidth < finalWidth) {
finalWidth = Math.min(maxWidth, remainedWidth);
}
// `minWidth` has higher priority. `minWidth` decide that wheter the
// bar is able to be visible. So `minWidth` should not be restricted
// by `maxWidth` or `remainedWidth` (which is from `bandWidth`). In
// the extreme cases for `value` axis, bars are allowed to overlap
// with each other if `minWidth` specified.
if (minWidth && minWidth > finalWidth) {
finalWidth = minWidth;
}
if (finalWidth !== autoWidth) {
column.width = finalWidth;
remainedWidth -= finalWidth + barGapPercent * finalWidth;
autoWidthCount--;
}
}
else {
// `barMinWidth/barMaxWidth` has higher priority than `barWidth`, as
// CSS does. Becuase barWidth can be a percent value, where
// `barMaxWidth` can be used to restrict the final width.
var finalWidth = column.width;
if (maxWidth) {
finalWidth = Math.min(finalWidth, maxWidth);
}
// `minWidth` has higher priority, as described above
if (minWidth) {
finalWidth = Math.max(finalWidth, minWidth);
}
column.width = finalWidth;
remainedWidth -= finalWidth + barGapPercent * finalWidth;
autoWidthCount--;
}
});
// Recalculate width again
autoWidth = (remainedWidth - categoryGap)
/ (autoWidthCount + (autoWidthCount - 1) * barGapPercent);
autoWidth = Math.max(autoWidth, 0);
var widthSum = 0;
var lastColumn;
zrUtil.each(stacks, function (column, idx) {
if (!column.width) {
column.width = autoWidth;
}
lastColumn = column;
widthSum += column.width * (1 + barGapPercent);
});
if (lastColumn) {
widthSum -= lastColumn.width * barGapPercent;
}
var offset = -widthSum / 2;
zrUtil.each(stacks, function (column, stackId) {
result[coordSysName][stackId] = result[coordSysName][stackId] || {
bandWidth: bandWidth,
offset: offset,
width: column.width
};
offset += column.width * (1 + barGapPercent);
});
});
return result;
}
/**
* @param {Object} barWidthAndOffset The result of makeColumnLayout
* @param {module:echarts/coord/Axis} axis
* @param {module:echarts/model/Series} [seriesModel] If not provided, return all.
* @return {Object} {stackId: {offset, width}} or {offset, width} if seriesModel provided.
*/
export function retrieveColumnLayout(barWidthAndOffset, axis, seriesModel) {
if (barWidthAndOffset && axis) {
var result = barWidthAndOffset[getAxisKey(axis)];
if (result != null && seriesModel != null) {
result = result[getSeriesStackId(seriesModel)];
}
return result;
}
}
/**
* @param {string} seriesType
* @param {module:echarts/model/Global} ecModel
*/
export function layout(seriesType, ecModel) {
var seriesModels = prepareLayoutBarSeries(seriesType, ecModel);
var barWidthAndOffset = makeColumnLayout(seriesModels);
var lastStackCoords = {};
var lastStackCoordsOrigin = {};
zrUtil.each(seriesModels, function (seriesModel) {
var data = seriesModel.getData();
var cartesian = seriesModel.coordinateSystem;
var baseAxis = cartesian.getBaseAxis();
var stackId = getSeriesStackId(seriesModel);
var columnLayoutInfo = barWidthAndOffset[getAxisKey(baseAxis)][stackId];
var columnOffset = columnLayoutInfo.offset;
var columnWidth = columnLayoutInfo.width;
var valueAxis = cartesian.getOtherAxis(baseAxis);
var barMinHeight = seriesModel.get('barMinHeight') || 0;
lastStackCoords[stackId] = lastStackCoords[stackId] || [];
lastStackCoordsOrigin[stackId] = lastStackCoordsOrigin[stackId] || []; // Fix #4243
data.setLayout({
bandWidth: columnLayoutInfo.bandWidth,
offset: columnOffset,
size: columnWidth
});
var valueDim = data.mapDimension(valueAxis.dim);
var baseDim = data.mapDimension(baseAxis.dim);
var stacked = isDimensionStacked(data, valueDim /*, baseDim*/);
var isValueAxisH = valueAxis.isHorizontal();
var valueAxisStart = getValueAxisStart(baseAxis, valueAxis, stacked);
for (var idx = 0, len = data.count(); idx < len; idx++) {
var value = data.get(valueDim, idx);
var baseValue = data.get(baseDim, idx);
var sign = value >= 0 ? 'p' : 'n';
var baseCoord = valueAxisStart;
// Because of the barMinHeight, we can not use the value in
// stackResultDimension directly.
if (stacked) {
// Only ordinal axis can be stacked.
if (!lastStackCoords[stackId][baseValue]) {
lastStackCoords[stackId][baseValue] = {
p: valueAxisStart, // Positive stack
n: valueAxisStart // Negative stack
};
}
// Should also consider #4243
baseCoord = lastStackCoords[stackId][baseValue][sign];
}
var x;
var y;
var width;
var height;
if (isValueAxisH) {
var coord = cartesian.dataToPoint([value, baseValue]);
x = baseCoord;
y = coord[1] + columnOffset;
width = coord[0] - valueAxisStart;
height = columnWidth;
if (Math.abs(width) < barMinHeight) {
width = (width < 0 ? -1 : 1) * barMinHeight;
}
// Ignore stack from NaN value
if (!isNaN(width)) {
stacked && (lastStackCoords[stackId][baseValue][sign] += width);
}
}
else {
var coord = cartesian.dataToPoint([baseValue, value]);
x = coord[0] + columnOffset;
y = baseCoord;
width = columnWidth;
height = coord[1] - valueAxisStart;
if (Math.abs(height) < barMinHeight) {
// Include zero to has a positive bar
height = (height <= 0 ? -1 : 1) * barMinHeight;
}
// Ignore stack from NaN value
if (!isNaN(height)) {
stacked && (lastStackCoords[stackId][baseValue][sign] += height);
}
}
data.setItemLayout(idx, {
x: x,
y: y,
width: width,
height: height
});
}
}, this);
}
// TODO: Do not support stack in large mode yet.
export var largeLayout = {
seriesType: 'bar',
plan: createRenderPlanner(),
reset: function (seriesModel) {
if (!isOnCartesian(seriesModel) || !isInLargeMode(seriesModel)) {
return;
}
var data = seriesModel.getData();
var cartesian = seriesModel.coordinateSystem;
var coordLayout = cartesian.grid.getRect();
var baseAxis = cartesian.getBaseAxis();
var valueAxis = cartesian.getOtherAxis(baseAxis);
var valueDim = data.mapDimension(valueAxis.dim);
var baseDim = data.mapDimension(baseAxis.dim);
var valueAxisHorizontal = valueAxis.isHorizontal();
var valueDimIdx = valueAxisHorizontal ? 0 : 1;
var barWidth = retrieveColumnLayout(
makeColumnLayout([seriesModel]), baseAxis, seriesModel
).width;
if (!(barWidth > LARGE_BAR_MIN_WIDTH)) { // jshint ignore:line
barWidth = LARGE_BAR_MIN_WIDTH;
}
return {progress: progress};
function progress(params, data) {
var count = params.count;
var largePoints = new LargeArr(count * 2);
var largeBackgroundPoints = new LargeArr(count * 2);
var largeDataIndices = new LargeArr(count);
var dataIndex;
var coord = [];
var valuePair = [];
var pointsOffset = 0;
var idxOffset = 0;
while ((dataIndex = params.next()) != null) {
valuePair[valueDimIdx] = data.get(valueDim, dataIndex);
valuePair[1 - valueDimIdx] = data.get(baseDim, dataIndex);
coord = cartesian.dataToPoint(valuePair, null, coord);
// Data index might not be in order, depends on `progressiveChunkMode`.
largeBackgroundPoints[pointsOffset] = valueAxisHorizontal
? coordLayout.x + coordLayout.width : coord[0];
largePoints[pointsOffset++] = coord[0];
largeBackgroundPoints[pointsOffset] = valueAxisHorizontal
? coord[1] : coordLayout.y + coordLayout.height;
largePoints[pointsOffset++] = coord[1];
largeDataIndices[idxOffset++] = dataIndex;
}
data.setLayout({
largePoints: largePoints,
largeDataIndices: largeDataIndices,
largeBackgroundPoints: largeBackgroundPoints,
barWidth: barWidth,
valueAxisStart: getValueAxisStart(baseAxis, valueAxis, false),
backgroundStart: valueAxisHorizontal ? coordLayout.x : coordLayout.y,
valueAxisHorizontal: valueAxisHorizontal
});
}
}
};
function isOnCartesian(seriesModel) {
return seriesModel.coordinateSystem && seriesModel.coordinateSystem.type === 'cartesian2d';
}
function isInLargeMode(seriesModel) {
return seriesModel.pipelineContext && seriesModel.pipelineContext.large;
}
// See cases in `test/bar-start.html` and `#7412`, `#8747`.
function getValueAxisStart(baseAxis, valueAxis, stacked) {
return valueAxis.toGlobalCoord(valueAxis.dataToCoord(valueAxis.type === 'log' ? 1 : 0));
}