constraint_defaults.js

/**
* Copyright 2012-2018, Plotly, Inc.
* All rights reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/


'use strict';

var handleConstraintValueDefaults = require('./constraint_value_defaults');
var handleLabelDefaults = require('./label_defaults');
var Color = require('../../components/color');
var addOpacity = Color.addOpacity;
var opacity = Color.opacity;
var CONSTRAINT_REDUCTION = require('../../constants/filter_ops').CONSTRAINT_REDUCTION;

module.exports = function handleConstraintDefaults(traceIn, traceOut, coerce, layout, defaultColor, opts) {
    var contours = traceOut.contours;
    var showLines, lineColor, fillColor;

    var operation = coerce('contours.operation');
    contours._operation = CONSTRAINT_REDUCTION[operation];

    handleConstraintValueDefaults(coerce, contours);

    if(operation === '=') {
        showLines = contours.showlines = true;
    }
    else {
        showLines = coerce('contours.showlines');
        fillColor = coerce('fillcolor', addOpacity(
            (traceIn.line || {}).color || defaultColor, 0.5
        ));
    }

    if(showLines) {
        var lineDfltColor = fillColor && opacity(fillColor) ?
            addOpacity(traceOut.fillcolor, 1) :
            defaultColor;
        lineColor = coerce('line.color', lineDfltColor);
        coerce('line.width', 2);
        coerce('line.dash');
    }

    coerce('line.smoothing');

    handleLabelDefaults(coerce, layout, lineColor, opts);
};