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1 files changed, 189 insertions, 0 deletions

diff --git a/node_modules/csso/lib/utils/walk.js b/node_modules/csso/lib/utils/walk.js
new file mode 100644
index 00000000..a7948eb8
--- /dev/null
+++ b/node_modules/csso/lib/utils/walk.js
@@ -0,0 +1,189 @@
+function walkRules(node, item, list) {
+    switch (node.type) {
+        case 'StyleSheet':
+            var oldStylesheet = this.stylesheet;
+            this.stylesheet = node;
+
+            node.rules.each(walkRules, this);
+
+            this.stylesheet = oldStylesheet;
+            break;
+
+        case 'Atrule':
+            if (node.block !== null) {
+                walkRules.call(this, node.block);
+            }
+
+            this.fn(node, item, list);
+            break;
+
+        case 'Ruleset':
+            this.fn(node, item, list);
+            break;
+    }
+
+}
+
+function walkRulesRight(node, item, list) {
+    switch (node.type) {
+        case 'StyleSheet':
+            var oldStylesheet = this.stylesheet;
+            this.stylesheet = node;
+
+            node.rules.eachRight(walkRulesRight, this);
+
+            this.stylesheet = oldStylesheet;
+            break;
+
+        case 'Atrule':
+            if (node.block !== null) {
+                walkRulesRight.call(this, node.block);
+            }
+
+            this.fn(node, item, list);
+            break;
+
+        case 'Ruleset':
+            this.fn(node, item, list);
+            break;
+    }
+}
+
+function walkAll(node, item, list) {
+    switch (node.type) {
+        case 'StyleSheet':
+            var oldStylesheet = this.stylesheet;
+            this.stylesheet = node;
+
+            node.rules.each(walkAll, this);
+
+            this.stylesheet = oldStylesheet;
+            break;
+
+        case 'Atrule':
+            if (node.expression !== null) {
+                walkAll.call(this, node.expression);
+            }
+            if (node.block !== null) {
+                walkAll.call(this, node.block);
+            }
+            break;
+
+        case 'Ruleset':
+            this.ruleset = node;
+
+            if (node.selector !== null) {
+                walkAll.call(this, node.selector);
+            }
+            walkAll.call(this, node.block);
+
+            this.ruleset = null;
+            break;
+
+        case 'Selector':
+            var oldSelector = this.selector;
+            this.selector = node;
+
+            node.selectors.each(walkAll, this);
+
+            this.selector = oldSelector;
+            break;
+
+        case 'Block':
+            node.declarations.each(walkAll, this);
+            break;
+
+        case 'Declaration':
+            this.declaration = node;
+
+            walkAll.call(this, node.property);
+            walkAll.call(this, node.value);
+
+            this.declaration = null;
+            break;
+
+        case 'Attribute':
+            walkAll.call(this, node.name);
+            if (node.value !== null) {
+                walkAll.call(this, node.value);
+            }
+            break;
+
+        case 'FunctionalPseudo':
+        case 'Function':
+            this['function'] = node;
+
+            node.arguments.each(walkAll, this);
+
+            this['function'] = null;
+            break;
+
+        case 'AtruleExpression':
+            this.atruleExpression = node;
+
+            node.sequence.each(walkAll, this);
+
+            this.atruleExpression = null;
+            break;
+
+        case 'Value':
+        case 'Argument':
+        case 'SimpleSelector':
+        case 'Braces':
+        case 'Negation':
+            node.sequence.each(walkAll, this);
+            break;
+
+        case 'Url':
+        case 'Progid':
+            walkAll.call(this, node.value);
+            break;
+
+        // nothig to do with
+        // case 'Property':
+        // case 'Combinator':
+        // case 'Dimension':
+        // case 'Hash':
+        // case 'Identifier':
+        // case 'Nth':
+        // case 'Class':
+        // case 'Id':
+        // case 'Percentage':
+        // case 'PseudoClass':
+        // case 'PseudoElement':
+        // case 'Space':
+        // case 'Number':
+        // case 'String':
+        // case 'Operator':
+        // case 'Raw':
+    }
+
+    this.fn(node, item, list);
+}
+
+function createContext(root, fn) {
+    var context = {
+        fn: fn,
+        root: root,
+        stylesheet: null,
+        atruleExpression: null,
+        ruleset: null,
+        selector: null,
+        declaration: null,
+        function: null
+    };
+
+    return context;
+}
+
+module.exports = {
+    all: function(root, fn) {
+        walkAll.call(createContext(root, fn), root);
+    },
+    rules: function(root, fn) {
+        walkRules.call(createContext(root, fn), root);
+    },
+    rulesRight: function(root, fn) {
+        walkRulesRight.call(createContext(root, fn), root);
+    }
+};