5 files changed, 746 insertions, 0 deletions

diff --git a/vendor/github.com/aymerick/douceur/LICENSE b/vendor/github.com/aymerick/douceur/LICENSE
new file mode 100644
index 0000000..6ce87cd
--- /dev/null
+++ b/vendor/github.com/aymerick/douceur/LICENSE
@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Aymerick JEHANNE
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
diff --git a/vendor/github.com/aymerick/douceur/css/declaration.go b/vendor/github.com/aymerick/douceur/css/declaration.go
new file mode 100644
index 0000000..61d29d3
--- /dev/null
+++ b/vendor/github.com/aymerick/douceur/css/declaration.go
@@ -0,0 +1,60 @@
+package css
+
+import "fmt"
+
+// Declaration represents a parsed style property
+type Declaration struct {
+        Property  string
+        Value     string
+        Important bool
+}
+
+// NewDeclaration instanciates a new Declaration
+func NewDeclaration() *Declaration {
+        return &Declaration{}
+}
+
+// Returns string representation of the Declaration
+func (decl *Declaration) String() string {
+        return decl.StringWithImportant(true)
+}
+
+// StringWithImportant returns string representation with optional !important part
+func (decl *Declaration) StringWithImportant(option bool) string {
+        result := fmt.Sprintf("%s: %s", decl.Property, decl.Value)
+
+        if option && decl.Important {
+                result += " !important"
+        }
+
+        result += ";"
+
+        return result
+}
+
+// Equal returns true if both Declarations are equals
+func (decl *Declaration) Equal(other *Declaration) bool {
+        return (decl.Property == other.Property) && (decl.Value == other.Value) && (decl.Important == other.Important)
+}
+
+//
+// DeclarationsByProperty
+//
+
+// DeclarationsByProperty represents sortable style declarations
+type DeclarationsByProperty []*Declaration
+
+// Implements sort.Interface
+func (declarations DeclarationsByProperty) Len() int {
+        return len(declarations)
+}
+
+// Implements sort.Interface
+func (declarations DeclarationsByProperty) Swap(i, j int) {
+        declarations[i], declarations[j] = declarations[j], declarations[i]
+}
+
+// Implements sort.Interface
+func (declarations DeclarationsByProperty) Less(i, j int) bool {
+        return declarations[i].Property < declarations[j].Property
+}
diff --git a/vendor/github.com/aymerick/douceur/css/rule.go b/vendor/github.com/aymerick/douceur/css/rule.go
new file mode 100644
index 0000000..b5a44b5
--- /dev/null
+++ b/vendor/github.com/aymerick/douceur/css/rule.go
@@ -0,0 +1,230 @@
+package css
+
+import (
+        "fmt"
+        "strings"
+)
+
+const (
+        indentSpace = 2
+)
+
+// RuleKind represents a Rule kind
+type RuleKind int
+
+// Rule kinds
+const (
+        QualifiedRule RuleKind = iota
+        AtRule
+)
+
+// At Rules than have Rules inside their block instead of Declarations
+var atRulesWithRulesBlock = []string{
+        "@document", "@font-feature-values", "@keyframes", "@media", "@supports",
+}
+
+// Rule represents a parsed CSS rule
+type Rule struct {
+        Kind RuleKind
+
+        // At Rule name (eg: "@media")
+        Name string
+
+        // Raw prelude
+        Prelude string
+
+        // Qualified Rule selectors parsed from prelude
+        Selectors []string
+
+        // Style properties
+        Declarations []*Declaration
+
+        // At Rule embedded rules
+        Rules []*Rule
+
+        // Current rule embedding level
+        EmbedLevel int
+}
+
+// NewRule instanciates a new Rule
+func NewRule(kind RuleKind) *Rule {
+        return &Rule{
+                Kind: kind,
+        }
+}
+
+// Returns string representation of rule kind
+func (kind RuleKind) String() string {
+        switch kind {
+        case QualifiedRule:
+                return "Qualified Rule"
+        case AtRule:
+                return "At Rule"
+        default:
+                return "WAT"
+        }
+}
+
+// EmbedsRules returns true if this rule embeds another rules
+func (rule *Rule) EmbedsRules() bool {
+        if rule.Kind == AtRule {
+                for _, atRuleName := range atRulesWithRulesBlock {
+                        if rule.Name == atRuleName {
+                                return true
+                        }
+                }
+        }
+
+        return false
+}
+
+// Equal returns true if both rules are equals
+func (rule *Rule) Equal(other *Rule) bool {
+        if (rule.Kind != other.Kind) ||
+                (rule.Prelude != other.Prelude) ||
+                (rule.Name != other.Name) {
+                return false
+        }
+
+        if (len(rule.Selectors) != len(other.Selectors)) ||
+                (len(rule.Declarations) != len(other.Declarations)) ||
+                (len(rule.Rules) != len(other.Rules)) {
+                return false
+        }
+
+        for i, sel := range rule.Selectors {
+                if sel != other.Selectors[i] {
+                        return false
+                }
+        }
+
+        for i, decl := range rule.Declarations {
+                if !decl.Equal(other.Declarations[i]) {
+                        return false
+                }
+        }
+
+        for i, rule := range rule.Rules {
+                if !rule.Equal(other.Rules[i]) {
+                        return false
+                }
+        }
+
+        return true
+}
+
+// Diff returns a string representation of rules differences
+func (rule *Rule) Diff(other *Rule) []string {
+        result := []string{}
+
+        if rule.Kind != other.Kind {
+                result = append(result, fmt.Sprintf("Kind: %s | %s", rule.Kind.String(), other.Kind.String()))
+        }
+
+        if rule.Prelude != other.Prelude {
+                result = append(result, fmt.Sprintf("Prelude: \"%s\" | \"%s\"", rule.Prelude, other.Prelude))
+        }
+
+        if rule.Name != other.Name {
+                result = append(result, fmt.Sprintf("Name: \"%s\" | \"%s\"", rule.Name, other.Name))
+        }
+
+        if len(rule.Selectors) != len(other.Selectors) {
+                result = append(result, fmt.Sprintf("Selectors: %v | %v", strings.Join(rule.Selectors, ", "), strings.Join(other.Selectors, ", ")))
+        } else {
+                for i, sel := range rule.Selectors {
+                        if sel != other.Selectors[i] {
+                                result = append(result, fmt.Sprintf("Selector: \"%s\" | \"%s\"", sel, other.Selectors[i]))
+                        }
+                }
+        }
+
+        if len(rule.Declarations) != len(other.Declarations) {
+                result = append(result, fmt.Sprintf("Declarations Nb: %d | %d", len(rule.Declarations), len(other.Declarations)))
+        } else {
+                for i, decl := range rule.Declarations {
+                        if !decl.Equal(other.Declarations[i]) {
+                                result = append(result, fmt.Sprintf("Declaration: \"%s\" | \"%s\"", decl.String(), other.Declarations[i].String()))
+                        }
+                }
+        }
+
+        if len(rule.Rules) != len(other.Rules) {
+                result = append(result, fmt.Sprintf("Rules Nb: %d | %d", len(rule.Rules), len(other.Rules)))
+        } else {
+
+                for i, rule := range rule.Rules {
+                        if !rule.Equal(other.Rules[i]) {
+                                result = append(result, fmt.Sprintf("Rule: \"%s\" | \"%s\"", rule.String(), other.Rules[i].String()))
+                        }
+                }
+        }
+
+        return result
+}
+
+// Returns the string representation of a rule
+func (rule *Rule) String() string {
+        result := ""
+
+        if rule.Kind == QualifiedRule {
+                for i, sel := range rule.Selectors {
+                        if i != 0 {
+                                result += ", "
+                        }
+                        result += sel
+                }
+        } else {
+                // AtRule
+                result += fmt.Sprintf("%s", rule.Name)
+
+                if rule.Prelude != "" {
+                        if result != "" {
+                                result += " "
+                        }
+                        result += fmt.Sprintf("%s", rule.Prelude)
+                }
+        }
+
+        if (len(rule.Declarations) == 0) && (len(rule.Rules) == 0) {
+                result += ";"
+        } else {
+                result += " {\n"
+
+                if rule.EmbedsRules() {
+                        for _, subRule := range rule.Rules {
+                                result += fmt.Sprintf("%s%s\n", rule.indent(), subRule.String())
+                        }
+                } else {
+                        for _, decl := range rule.Declarations {
+                                result += fmt.Sprintf("%s%s\n", rule.indent(), decl.String())
+                        }
+                }
+
+                result += fmt.Sprintf("%s}", rule.indentEndBlock())
+        }
+
+        return result
+}
+
+// Returns identation spaces for declarations and rules
+func (rule *Rule) indent() string {
+        result := ""
+
+        for i := 0; i < ((rule.EmbedLevel + 1) * indentSpace); i++ {
+                result += " "
+        }
+
+        return result
+}
+
+// Returns identation spaces for end of block character
+func (rule *Rule) indentEndBlock() string {
+        result := ""
+
+        for i := 0; i < (rule.EmbedLevel * indentSpace); i++ {
+                result += " "
+        }
+
+        return result
+}
diff --git a/vendor/github.com/aymerick/douceur/css/stylesheet.go b/vendor/github.com/aymerick/douceur/css/stylesheet.go
new file mode 100644
index 0000000..6b32c2e
--- /dev/null
+++ b/vendor/github.com/aymerick/douceur/css/stylesheet.go
@@ -0,0 +1,25 @@
+package css
+
+// Stylesheet represents a parsed stylesheet
+type Stylesheet struct {
+        Rules []*Rule
+}
+
+// NewStylesheet instanciate a new Stylesheet
+func NewStylesheet() *Stylesheet {
+        return &Stylesheet{}
+}
+
+// Returns string representation of the Stylesheet
+func (sheet *Stylesheet) String() string {
+        result := ""
+
+        for _, rule := range sheet.Rules {
+                if result != "" {
+                        result += "\n"
+                }
+                result += rule.String()
+        }
+
+        return result
+}
diff --git a/vendor/github.com/aymerick/douceur/parser/parser.go b/vendor/github.com/aymerick/douceur/parser/parser.go
new file mode 100644
index 0000000..6c4917c
--- /dev/null
+++ b/vendor/github.com/aymerick/douceur/parser/parser.go
@@ -0,0 +1,409 @@
+package parser
+
+import (
+        "errors"
+        "fmt"
+        "regexp"
+        "strings"
+
+        "github.com/gorilla/css/scanner"
+
+        "github.com/aymerick/douceur/css"
+)
+
+const (
+        importantSuffixRegexp = `(?i)\s*!important\s*$`
+)
+
+var (
+        importantRegexp *regexp.Regexp
+)
+
+// Parser represents a CSS parser
+type Parser struct {
+        scan *scanner.Scanner // Tokenizer
+
+        // Tokens parsed but not consumed yet
+        tokens []*scanner.Token
+
+        // Rule embedding level
+        embedLevel int
+}
+
+func init() {
+        importantRegexp = regexp.MustCompile(importantSuffixRegexp)
+}
+
+// NewParser instanciates a new parser
+func NewParser(txt string) *Parser {
+        return &Parser{
+                scan: scanner.New(txt),
+        }
+}
+
+// Parse parses a whole stylesheet
+func Parse(text string) (*css.Stylesheet, error) {
+        result, err := NewParser(text).ParseStylesheet()
+        if err != nil {
+                return nil, err
+        }
+
+        return result, nil
+}
+
+// ParseDeclarations parses CSS declarations
+func ParseDeclarations(text string) ([]*css.Declaration, error) {
+        result, err := NewParser(text).ParseDeclarations()
+        if err != nil {
+                return nil, err
+        }
+
+        return result, nil
+}
+
+// ParseStylesheet parses a stylesheet
+func (parser *Parser) ParseStylesheet() (*css.Stylesheet, error) {
+        result := css.NewStylesheet()
+
+        // Parse BOM
+        if _, err := parser.parseBOM(); err != nil {
+                return result, err
+        }
+
+        // Parse list of rules
+        rules, err := parser.ParseRules()
+        if err != nil {
+                return result, err
+        }
+
+        result.Rules = rules
+
+        return result, nil
+}
+
+// ParseRules parses a list of rules
+func (parser *Parser) ParseRules() ([]*css.Rule, error) {
+        result := []*css.Rule{}
+
+        inBlock := false
+        if parser.tokenChar("{") {
+                // parsing a block of rules
+                inBlock = true
+                parser.embedLevel++
+
+                parser.shiftToken()
+        }
+
+        for parser.tokenParsable() {
+                if parser.tokenIgnorable() {
+                        parser.shiftToken()
+                } else if parser.tokenChar("}") {
+                        if !inBlock {
+                                errMsg := fmt.Sprintf("Unexpected } character: %s", parser.nextToken().String())
+                                return result, errors.New(errMsg)
+                        }
+
+                        parser.shiftToken()
+                        parser.embedLevel--
+
+                        // finished
+                        break
+                } else {
+                        rule, err := parser.ParseRule()
+                        if err != nil {
+                                return result, err
+                        }
+
+                        rule.EmbedLevel = parser.embedLevel
+                        result = append(result, rule)
+                }
+        }
+
+        return result, parser.err()
+}
+
+// ParseRule parses a rule
+func (parser *Parser) ParseRule() (*css.Rule, error) {
+        if parser.tokenAtKeyword() {
+                return parser.parseAtRule()
+        }
+
+        return parser.parseQualifiedRule()
+}
+
+// ParseDeclarations parses a list of declarations
+func (parser *Parser) ParseDeclarations() ([]*css.Declaration, error) {
+        result := []*css.Declaration{}
+
+        if parser.tokenChar("{") {
+                parser.shiftToken()
+        }
+
+        for parser.tokenParsable() {
+                if parser.tokenIgnorable() {
+                        parser.shiftToken()
+                } else if parser.tokenChar("}") {
+                        // end of block
+                        parser.shiftToken()
+                        break
+                } else {
+                        declaration, err := parser.ParseDeclaration()
+                        if err != nil {
+                                return result, err
+                        }
+
+                        result = append(result, declaration)
+                }
+        }
+
+        return result, parser.err()
+}
+
+// ParseDeclaration parses a declaration
+func (parser *Parser) ParseDeclaration() (*css.Declaration, error) {
+        result := css.NewDeclaration()
+        curValue := ""
+
+        for parser.tokenParsable() {
+                if parser.tokenChar(":") {
+                        result.Property = strings.TrimSpace(curValue)
+                        curValue = ""
+
+                        parser.shiftToken()
+                } else if parser.tokenChar(";") || parser.tokenChar("}") {
+                        if result.Property == "" {
+                                errMsg := fmt.Sprintf("Unexpected ; character: %s", parser.nextToken().String())
+                                return result, errors.New(errMsg)
+                        }
+
+                        if importantRegexp.MatchString(curValue) {
+                                result.Important = true
+                                curValue = importantRegexp.ReplaceAllString(curValue, "")
+                        }
+
+                        result.Value = strings.TrimSpace(curValue)
+
+                        if parser.tokenChar(";") {
+                                parser.shiftToken()
+                        }
+
+                        // finished
+                        break
+                } else {
+                        token := parser.shiftToken()
+                        curValue += token.Value
+                }
+        }
+
+        // log.Printf("[parsed] Declaration: %s", result.String())
+
+        return result, parser.err()
+}
+
+// Parse an At Rule
+func (parser *Parser) parseAtRule() (*css.Rule, error) {
+        // parse rule name (eg: "@import")
+        token := parser.shiftToken()
+
+        result := css.NewRule(css.AtRule)
+        result.Name = token.Value
+
+        for parser.tokenParsable() {
+                if parser.tokenChar(";") {
+                        parser.shiftToken()
+
+                        // finished
+                        break
+                } else if parser.tokenChar("{") {
+                        if result.EmbedsRules() {
+                                // parse rules block
+                                rules, err := parser.ParseRules()
+                                if err != nil {
+                                        return result, err
+                                }
+
+                                result.Rules = rules
+                        } else {
+                                // parse declarations block
+                                declarations, err := parser.ParseDeclarations()
+                                if err != nil {
+                                        return result, err
+                                }
+
+                                result.Declarations = declarations
+                        }
+
+                        // finished
+                        break
+                } else {
+                        // parse prelude
+                        prelude, err := parser.parsePrelude()
+                        if err != nil {
+                                return result, err
+                        }
+
+                        result.Prelude = prelude
+                }
+        }
+
+        // log.Printf("[parsed] Rule: %s", result.String())
+
+        return result, parser.err()
+}
+
+// Parse a Qualified Rule
+func (parser *Parser) parseQualifiedRule() (*css.Rule, error) {
+        result := css.NewRule(css.QualifiedRule)
+
+        for parser.tokenParsable() {
+                if parser.tokenChar("{") {
+                        if result.Prelude == "" {
+                                errMsg := fmt.Sprintf("Unexpected { character: %s", parser.nextToken().String())
+                                return result, errors.New(errMsg)
+                        }
+
+                        // parse declarations block
+                        declarations, err := parser.ParseDeclarations()
+                        if err != nil {
+                                return result, err
+                        }
+
+                        result.Declarations = declarations
+
+                        // finished
+                        break
+                } else {
+                        // parse prelude
+                        prelude, err := parser.parsePrelude()
+                        if err != nil {
+                                return result, err
+                        }
+
+                        result.Prelude = prelude
+                }
+        }
+
+        result.Selectors = strings.Split(result.Prelude, ",")
+        for i, sel := range result.Selectors {
+                result.Selectors[i] = strings.TrimSpace(sel)
+        }
+
+        // log.Printf("[parsed] Rule: %s", result.String())
+
+        return result, parser.err()
+}
+
+// Parse Rule prelude
+func (parser *Parser) parsePrelude() (string, error) {
+        result := ""
+
+        for parser.tokenParsable() && !parser.tokenEndOfPrelude() {
+                token := parser.shiftToken()
+                result += token.Value
+        }
+
+        result = strings.TrimSpace(result)
+
+        // log.Printf("[parsed] prelude: %s", result)
+
+        return result, parser.err()
+}
+
+// Parse BOM
+func (parser *Parser) parseBOM() (bool, error) {
+        if parser.nextToken().Type == scanner.TokenBOM {
+                parser.shiftToken()
+                return true, nil
+        }
+
+        return false, parser.err()
+}
+
+// Returns next token without removing it from tokens buffer
+func (parser *Parser) nextToken() *scanner.Token {
+        if len(parser.tokens) == 0 {
+                // fetch next token
+                nextToken := parser.scan.Next()
+
+                // log.Printf("[token] %s => %v", nextToken.Type.String(), nextToken.Value)
+
+                // queue it
+                parser.tokens = append(parser.tokens, nextToken)
+        }
+
+        return parser.tokens[0]
+}
+
+// Returns next token and remove it from the tokens buffer
+func (parser *Parser) shiftToken() *scanner.Token {
+        var result *scanner.Token
+
+        result, parser.tokens = parser.tokens[0], parser.tokens[1:]
+        return result
+}
+
+// Returns tokenizer error, or nil if no error
+func (parser *Parser) err() error {
+        if parser.tokenError() {
+                token := parser.nextToken()
+                return fmt.Errorf("Tokenizer error: %s", token.String())
+        }
+
+        return nil
+}
+
+// Returns true if next token is Error
+func (parser *Parser) tokenError() bool {
+        return parser.nextToken().Type == scanner.TokenError
+}
+
+// Returns true if next token is EOF
+func (parser *Parser) tokenEOF() bool {
+        return parser.nextToken().Type == scanner.TokenEOF
+}
+
+// Returns true if next token is a whitespace
+func (parser *Parser) tokenWS() bool {
+        return parser.nextToken().Type == scanner.TokenS
+}
+
+// Returns true if next token is a comment
+func (parser *Parser) tokenComment() bool {
+        return parser.nextToken().Type == scanner.TokenComment
+}
+
+// Returns true if next token is a CDO or a CDC
+func (parser *Parser) tokenCDOorCDC() bool {
+        switch parser.nextToken().Type {
+        case scanner.TokenCDO, scanner.TokenCDC:
+                return true
+        default:
+                return false
+        }
+}
+
+// Returns true if next token is ignorable
+func (parser *Parser) tokenIgnorable() bool {
+        return parser.tokenWS() || parser.tokenComment() || parser.tokenCDOorCDC()
+}
+
+// Returns true if next token is parsable
+func (parser *Parser) tokenParsable() bool {
+        return !parser.tokenEOF() && !parser.tokenError()
+}
+
+// Returns true if next token is an At Rule keyword
+func (parser *Parser) tokenAtKeyword() bool {
+        return parser.nextToken().Type == scanner.TokenAtKeyword
+}
+
+// Returns true if next token is given character
+func (parser *Parser) tokenChar(value string) bool {
+        token := parser.nextToken()
+        return (token.Type == scanner.TokenChar) && (token.Value == value)
+}
+
+// Returns true if next token marks the end of a prelude
+func (parser *Parser) tokenEndOfPrelude() bool {
+        return parser.tokenChar(";") || parser.tokenChar("{")
+}