ducha-qianduan/node_modules/echarts/lib/coord/cartesian/cartesianAxisHelper.js

/*
* 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 zrUtil = require("zrender/lib/core/util");

/*
* 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.
*/

/**
 * Can only be called after coordinate system creation stage.
 * (Can be called before coordinate system update stage).
 *
 * @param {Object} opt {labelInside}
 * @return {Object} {
 *  position, rotation, labelDirection, labelOffset,
 *  tickDirection, labelRotate, z2
 * }
 */
function layout(gridModel, axisModel, opt) {
  opt = opt || {};
  var grid = gridModel.coordinateSystem;
  var axis = axisModel.axis;
  var layout = {};
  var otherAxisOnZeroOf = axis.getAxesOnZeroOf()[0];
  var rawAxisPosition = axis.position;
  var axisPosition = otherAxisOnZeroOf ? 'onZero' : rawAxisPosition;
  var axisDim = axis.dim;
  var rect = grid.getRect();
  var rectBound = [rect.x, rect.x + rect.width, rect.y, rect.y + rect.height];
  var idx = {
    left: 0,
    right: 1,
    top: 0,
    bottom: 1,
    onZero: 2
  };
  var axisOffset = axisModel.get('offset') || 0;
  var posBound = axisDim === 'x' ? [rectBound[2] - axisOffset, rectBound[3] + axisOffset] : [rectBound[0] - axisOffset, rectBound[1] + axisOffset];

  if (otherAxisOnZeroOf) {
    var onZeroCoord = otherAxisOnZeroOf.toGlobalCoord(otherAxisOnZeroOf.dataToCoord(0));
    posBound[idx.onZero] = Math.max(Math.min(onZeroCoord, posBound[1]), posBound[0]);
  } // Axis position


  layout.position = [axisDim === 'y' ? posBound[idx[axisPosition]] : rectBound[0], axisDim === 'x' ? posBound[idx[axisPosition]] : rectBound[3]]; // Axis rotation

  layout.rotation = Math.PI / 2 * (axisDim === 'x' ? 0 : 1); // Tick and label direction, x y is axisDim

  var dirMap = {
    top: -1,
    bottom: 1,
    left: -1,
    right: 1
  };
  layout.labelDirection = layout.tickDirection = layout.nameDirection = dirMap[rawAxisPosition];
  layout.labelOffset = otherAxisOnZeroOf ? posBound[idx[rawAxisPosition]] - posBound[idx.onZero] : 0;

  if (axisModel.get('axisTick.inside')) {
    layout.tickDirection = -layout.tickDirection;
  }

  if (zrUtil.retrieve(opt.labelInside, axisModel.get('axisLabel.inside'))) {
    layout.labelDirection = -layout.labelDirection;
  } // Special label rotation


  var labelRotate = axisModel.get('axisLabel.rotate');
  layout.labelRotate = axisPosition === 'top' ? -labelRotate : labelRotate; // Over splitLine and splitArea

  layout.z2 = 1;
  return layout;
}

exports.layout = layout;