ewwet

README

Package ewwet parses Emmet-like abbreviations and expands them into XML.

go get

go get -u github.com/shu-go/ewwet

Example

func Example() {
	expanded, _ := ewwet.Expand("ul>li.item-${ITEM$}*3")
	fmt.Println(expanded)

	//Output:
	// <ul><li class="item-1">ITEM1</li><li class="item-2">ITEM2</li><li class="item-3">ITEM3</li></ul>
}

Documentation

Overview

Package ewwet parses Emmet-like abbreviations and expands them into XML.

Limitations

• No implicit tag names (`ul>.cls` causes an error)
• Generates always empty-element tags (yes: <a />, no: <a></a>)
• (internal) each TEXT {...}, QTEXT "..." is a token, unlike attr-list [, ..., ]

Example

package main

import (
	"fmt"

	"github.com/shu-go/ewwet"
)

func main() {
	expanded, _ := ewwet.Expand("ul>li.item-${ITEM$}*3")
	fmt.Println(expanded)

}

Output:

<ul><li class="item-1">ITEM1</li><li class="item-2">ITEM2</li><li class="item-3">ITEM3</li></ul>

Index

• Constants
• func Expand(s string) (string, error)
• func Parse(in io.Reader, listener Listener) (parseError error)
• type Lexer
  • func NewLexer(in io.Reader) *Lexer
  • func (l *Lexer) Back()
  • func (l *Lexer) Dump() string
  • func (l *Lexer) Next() Token
  • func (l *Lexer) Transaction() LexerTx
• type LexerTx
  • func (tx *LexerTx) Back()
  • func (tx *LexerTx) Dec()
  • func (tx *LexerTx) Inc()
  • func (tx *LexerTx) Next() Token
  • func (tx *LexerTx) Rollback()
  • func (tx *LexerTx) Transaction() LexerTx
• type Listener
• type Node
  • func (n *Node) AppendChild(child *Node) *Node
  • func (n *Node) Dump() string
• type NodeListener
  • func NewNodeListener() NodeListener
  • func (nl *NodeListener) Attribute(name, value string) error
  • func (nl *NodeListener) Class(name string) error
  • func (nl *NodeListener) Element(name string) error
  • func (nl *NodeListener) GroupBegin() error
  • func (nl *NodeListener) GroupEnd() error
  • func (nl *NodeListener) ID(name string) error
  • func (nl *NodeListener) Mul(count int) error
  • func (nl *NodeListener) OpChild() error
  • func (nl *NodeListener) OpClimbup(count int) error
  • func (nl *NodeListener) OpSibling() error
  • func (nl *NodeListener) Text(text string) error
• type NodeType
• type Parser
• type Token
  • func (t Token) String() string
• type TokenType

Examples

• Package

Constants

const (
	Root = NodeType("ROOT")
	WIP  = NodeType("WIP")

	Element = NodeType("element")
	Text    = NodeType("text")
	Group   = NodeType("group")
)

const (
	EOF = TokenType("eof")
	ERR = TokenType("err")

	CHILD      = TokenType(">")
	SIBLING    = TokenType("+")
	CLIMBUP    = TokenType("^")
	MULT       = TokenType("*")
	GROUPBEGIN = TokenType("(")
	GROUPEND   = TokenType(")")

	ID        = TokenType("#")
	CLASS     = TokenType(".")
	ATTRBEGIN = TokenType("[")
	ATTREND   = TokenType("]")
	EQ        = TokenType("=")

	STRING = TokenType("string")
	TEXT   = TokenType(`{}`)
	QTEXT  = TokenType(`""`)
)

Functions

func Expand

func Expand(s string) (string, error)

Expand expands Emmet abbreviation in string s.

func Parse

func Parse(in io.Reader, listener Listener) (parseError error)

Types

type Lexer

type Lexer struct {
	// contains filtered or unexported fields
}

func NewLexer

func NewLexer(in io.Reader) *Lexer

func (*Lexer) Back

func (l *Lexer) Back()

func (*Lexer) Dump

func (l *Lexer) Dump() string

func (*Lexer) Next

func (l *Lexer) Next() Token

func (*Lexer) Transaction

func (l *Lexer) Transaction() LexerTx

type LexerTx

type LexerTx struct {
	// contains filtered or unexported fields
}

LexerTx can not be used in pallarel

func (*LexerTx) Back

func (tx *LexerTx) Back()

func (*LexerTx) Dec

func (tx *LexerTx) Dec()

func (*LexerTx) Inc

func (tx *LexerTx) Inc()

func (*LexerTx) Next

func (tx *LexerTx) Next() Token

func (*LexerTx) Rollback

func (tx *LexerTx) Rollback()

func (*LexerTx) Transaction

func (tx *LexerTx) Transaction() LexerTx

type Listener

type Listener interface {
	Element(name string) error
	ID(name string) error
	Class(name string) error
	Attribute(name, value string) error
	Text(text string) error
	Mul(count int) error

	OpChild() error
	OpSibling() error
	OpClimbup(count int) error

	GroupBegin() error
	GroupEnd() error
}

type Node

type Node struct {
	Type      NodeType
	Data      string
	Attribute map[string]string

	Mul int

	Parent, FirstChild, LastChild, NextSibling, PrevSibling *Node
}

func (*Node) AppendChild

func (n *Node) AppendChild(child *Node) *Node

func (*Node) Dump

func (n *Node) Dump() string

type NodeListener

type NodeListener struct {
	Root *Node
	// contains filtered or unexported fields
}

func NewNodeListener

func NewNodeListener() NodeListener

func (*NodeListener) Attribute

func (nl *NodeListener) Attribute(name, value string) error

func (*NodeListener) Class

func (nl *NodeListener) Class(name string) error

func (*NodeListener) Element

func (nl *NodeListener) Element(name string) error

func (*NodeListener) GroupBegin

func (nl *NodeListener) GroupBegin() error

func (*NodeListener) GroupEnd

func (nl *NodeListener) GroupEnd() error

func (*NodeListener) ID

func (nl *NodeListener) ID(name string) error

func (*NodeListener) Mul

func (nl *NodeListener) Mul(count int) error

func (*NodeListener) OpChild

func (nl *NodeListener) OpChild() error

func (*NodeListener) OpClimbup

func (nl *NodeListener) OpClimbup(count int) error

func (*NodeListener) OpSibling

func (nl *NodeListener) OpSibling() error

func (*NodeListener) Text

func (nl *NodeListener) Text(text string) error

type NodeType

type NodeType string

type Parser

type Parser struct {
	// contains filtered or unexported fields
}

EBNF:

attr-list = "[", attr, { attr }, "]";
attr = STRING, ["=", (QTEXT | STRING)];
id = "#", STRING;
class = ".", STRING;

tag-element = STRING, { id | class | attr-list }, [ TEXT ];
multiplication = "*", NUMBER;

element = ( tag-element | TEXT ), [multiplication];

group = "(", abbreviation, ")", [multiplication];

operator = CHILD | SIBLING | repeatable-operator;
repeatable-operator = CLIMBUP, {CLIMBUP}

abbreviation = (group | element), [operator, abbreviation]

type Token

type Token struct {
	Type TokenType
	Text string
}

func (Token) String

func (t Token) String() string

type TokenType

type TokenType string