first commit

app_vue/node_modules/css-tree/lib/syntax/node/Ratio.js

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+var isDigit = require('../../tokenizer').isDigit;
+var TYPE = require('../../tokenizer').TYPE;
+
+var NUMBER = TYPE.Number;
+var DELIM = TYPE.Delim;
+var SOLIDUS = 0x002F;  // U+002F SOLIDUS (/)
+var FULLSTOP = 0x002E; // U+002E FULL STOP (.)
+
+// Terms of <ratio> should be a positive numbers (not zero or negative)
+// (see https://drafts.csswg.org/mediaqueries-3/#values)
+// However, -o-min-device-pixel-ratio takes fractional values as a ratio's term
+// and this is using by various sites. Therefore we relax checking on parse
+// to test a term is unsigned number without an exponent part.
+// Additional checking may be applied on lexer validation.
+function consumeNumber() {
+    this.scanner.skipWS();
+
+    var value = this.consume(NUMBER);
+
+    for (var i = 0; i < value.length; i++) {
+        var code = value.charCodeAt(i);
+        if (!isDigit(code) && code !== FULLSTOP) {
+            this.error('Unsigned number is expected', this.scanner.tokenStart - value.length + i);
+        }
+    }
+
+    if (Number(value) === 0) {
+        this.error('Zero number is not allowed', this.scanner.tokenStart - value.length);
+    }
+
+    return value;
+}
+
+// <positive-integer> S* '/' S* <positive-integer>
+module.exports = {
+    name: 'Ratio',
+    structure: {
+        left: String,
+        right: String
+    },
+    parse: function() {
+        var start = this.scanner.tokenStart;
+        var left = consumeNumber.call(this);
+        var right;
+
+        this.scanner.skipWS();
+
+        if (!this.scanner.isDelim(SOLIDUS)) {
+            this.error('Solidus is expected');
+        }
+        this.eat(DELIM);
+        right = consumeNumber.call(this);
+
+        return {
+            type: 'Ratio',
+            loc: this.getLocation(start, this.scanner.tokenStart),
+            left: left,
+            right: right
+        };
+    },
+    generate: function(node) {
+        this.chunk(node.left);
+        this.chunk('/');
+        this.chunk(node.right);
+    }
+};