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node_modules.less.lib.less.functions.svg.js Maven / Gradle / Ivy
module.exports = function(environment) {
var Dimension = require("../tree/dimension"),
Color = require("../tree/color"),
Expression = require("../tree/expression"),
Quoted = require("../tree/quoted"),
URL = require("../tree/url"),
functionRegistry = require("./function-registry");
functionRegistry.add("svg-gradient", function(direction) {
var stops,
gradientDirectionSvg,
gradientType = "linear",
rectangleDimension = 'x="0" y="0" width="1" height="1"',
renderEnv = {compress: false},
returner,
directionValue = direction.toCSS(renderEnv),
i, color, position, positionValue, alpha;
function throwArgumentDescriptor() {
throw { type: "Argument",
message: "svg-gradient expects direction, start_color [start_position], [color position,]...," +
" end_color [end_position] or direction, color list" };
}
if (arguments.length == 2) {
if (arguments[1].value.length < 2) {
throwArgumentDescriptor();
}
stops = arguments[1].value;
} else if (arguments.length < 3) {
throwArgumentDescriptor();
} else {
stops = Array.prototype.slice.call(arguments, 1);
}
switch (directionValue) {
case "to bottom":
gradientDirectionSvg = 'x1="0%" y1="0%" x2="0%" y2="100%"';
break;
case "to right":
gradientDirectionSvg = 'x1="0%" y1="0%" x2="100%" y2="0%"';
break;
case "to bottom right":
gradientDirectionSvg = 'x1="0%" y1="0%" x2="100%" y2="100%"';
break;
case "to top right":
gradientDirectionSvg = 'x1="0%" y1="100%" x2="100%" y2="0%"';
break;
case "ellipse":
case "ellipse at center":
gradientType = "radial";
gradientDirectionSvg = 'cx="50%" cy="50%" r="75%"';
rectangleDimension = 'x="-50" y="-50" width="101" height="101"';
break;
default:
throw { type: "Argument", message: "svg-gradient direction must be 'to bottom', 'to right'," +
" 'to bottom right', 'to top right' or 'ellipse at center'" };
}
returner = '' +
'' +
'<' + gradientType + 'Gradient id="gradient" gradientUnits="userSpaceOnUse" ' + gradientDirectionSvg + '>';
for (i = 0; i < stops.length; i+= 1) {
if (stops[i] instanceof Expression) {
color = stops[i].value[0];
position = stops[i].value[1];
} else {
color = stops[i];
position = undefined;
}
if (!(color instanceof Color) || (!((i === 0 || i + 1 === stops.length) && position === undefined) && !(position instanceof Dimension))) {
throwArgumentDescriptor();
}
positionValue = position ? position.toCSS(renderEnv) : i === 0 ? "0%" : "100%";
alpha = color.alpha;
returner += ' ';
returner = encodeURIComponent(returner);
returner = "data:image/svg+xml," + returner;
return new URL(new Quoted("'" + returner + "'", returner, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo);
});
};
