org.lesscss.mojo.js.less.tree.operation.js Maven / Gradle / Ivy
(function (tree) {
tree.Operation = function (op, operands, isSpaced) {
this.op = op.trim();
this.operands = operands;
this.isSpaced = isSpaced;
};
tree.Operation.prototype = {
type: "Operation",
accept: function (visitor) {
this.operands = visitor.visit(this.operands);
},
eval: function (env) {
var a = this.operands[0].eval(env),
b = this.operands[1].eval(env),
temp;
if (env.isMathOn()) {
if (a instanceof tree.Dimension && b instanceof tree.Color) {
if (this.op === '*' || this.op === '+') {
temp = b, b = a, a = temp;
} else {
throw { type: "Operation",
message: "Can't substract or divide a color from a number" };
}
}
if (!a.operate) {
throw { type: "Operation",
message: "Operation on an invalid type" };
}
return a.operate(env, this.op, b);
} else {
return new(tree.Operation)(this.op, [a, b], this.isSpaced);
}
},
genCSS: function (env, output) {
this.operands[0].genCSS(env, output);
if (this.isSpaced) {
output.add(" ");
}
output.add(this.op);
if (this.isSpaced) {
output.add(" ");
}
this.operands[1].genCSS(env, output);
},
toCSS: tree.toCSS
};
tree.operate = function (env, op, a, b) {
switch (op) {
case '+': return a + b;
case '-': return a - b;
case '*': return a * b;
case '/': return a / b;
}
};
})(require('../tree'));