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* @license Apache-2.0
*
* Copyright (c) 2018 The Stdlib Authors.
*
* Licensed 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.
*/
'use strict';
// MODULES //
var logger = require( 'debug' );
// VARIABLES //
var debug = logger( 'plot:render:svg:marks:lines' );
// MAIN //
/**
* Renders line marks.
*
* @private
* @param {Object} state - state
* @returns {VTree} virtual tree
*/
function render( state ) {
var nOpacities;
var lineStyle;
var opacity;
var nColors;
var nStyles;
var nWidths;
var color;
var width;
var marks;
var line;
var len;
var i;
line = state.$.svg.path;
nOpacities = state.lineOpacity.length;
nStyles = state.lineStyle.length;
nWidths = state.lineWidth.length;
nColors = state.colors.length;
len = state.x.length;
marks = [];
debug( 'Rendering lines...' );
for ( i = 0; i < len; i++ ) {
lineStyle = state.lineStyle[ i%nStyles ];
debug( 'Line style: %s (%d).', lineStyle, i );
if ( lineStyle === 'none' ) {
debug( 'Line style (%d) is `none`. Skipping...', i );
continue;
}
color = state.colors[ i%nColors ];
debug( 'Line color: %s (%d).', color, i );
opacity = state.lineOpacity[ i%nOpacities ];
debug( 'Line opacity: %s (%d).', opacity, i );
width = state.lineWidth[ i%nWidths ];
debug( 'Line width: %s (%d).', width, i );
line.x = state.x[ i ];
line.y = state.y[ i ];
line.style = lineStyle;
line.label = state.labels[ i ] || '';
line.color = color;
line.opacity = opacity;
line.width = width;
debug( 'Rendering line %d...', i );
marks.push( line.render() );
}
debug( 'Finished rendering lines.' );
return marks;
}
// EXPORTS //
module.exports = render;
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