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Static Public Member Functions | Public Attributes | List of all members
JavaScriptMinifier Class Reference

This class is meant to safely minify javascript code, while leaving syntactically correct programs intact. More...

Static Public Member Functions

static minify ( $s)
 Returns minified JavaScript code.
 
static parseError ( $fullJavascript, $position, $errorMsg)
 

Public Attributes

const CONDITION = 1
 
const EXPRESSION = 3
 
const EXPRESSION_FUNC = 6
 
const EXPRESSION_NO_NL = 4
 
const EXPRESSION_OP = 5
 
const EXPRESSION_TERNARY = 7
 
const EXPRESSION_TERNARY_FUNC = 9
 
const EXPRESSION_TERNARY_OP = 8
 
const MAX_LINE_LENGTH = 1000
 NOTE: This isn't a strict maximum.
 
const PAREN_EXPRESSION = 10
 
const PAREN_EXPRESSION_FUNC = 12
 
const PAREN_EXPRESSION_OP = 11
 
const PROPERTY_ASSIGNMENT = 2
 
const PROPERTY_EXPRESSION = 13
 
const PROPERTY_EXPRESSION_FUNC = 15
 
const PROPERTY_EXPRESSION_OP = 14
 
const STACK_LIMIT = 1000
 
const STATEMENT = 0
 
const TYPE_ADD_OP = 4
 
const TYPE_BIN_OP = 3
 
const TYPE_BRACE_CLOSE = 10
 
const TYPE_BRACE_OPEN = 9
 
const TYPE_COLON = 6
 
const TYPE_COMMA = 7
 
const TYPE_DO = 15
 
const TYPE_FUNC = 16
 
const TYPE_HOOK = 5
 
const TYPE_IF = 14
 
const TYPE_INCR_OP = 2
 
const TYPE_LITERAL = 17
 
const TYPE_PAREN_CLOSE = 12
 
const TYPE_PAREN_OPEN = 11
 
const TYPE_RETURN = 13
 
const TYPE_SEMICOLON = 8
 
const TYPE_UN_OP = 1
 

Detailed Description

This class is meant to safely minify javascript code, while leaving syntactically correct programs intact.

Other libraries, such as JSMin require a certain coding style to work correctly. OTOH, libraries like jsminplus, that do parse the code correctly are rather slow, because they construct a complete parse tree before outputting the code minified. So this class is meant to allow arbitrary (but syntactically correct) input, while being fast enough to be used for on-the-fly minifying.

Definition at line 18 of file JavaScriptMinifier.php.

Member Function Documentation

◆ minify()

static JavaScriptMinifier::minify (   $s)
static

Returns minified JavaScript code.

Parameters
string$sJavaScript code to minify
Returns
String Minified code

Definition at line 78 of file JavaScriptMinifier.php.

References $last, $out, $s, $type, CONDITION, EXPRESSION, EXPRESSION_FUNC, EXPRESSION_NO_NL, EXPRESSION_OP, EXPRESSION_TERNARY, EXPRESSION_TERNARY_FUNC, EXPRESSION_TERNARY_OP, PAREN_EXPRESSION, PAREN_EXPRESSION_FUNC, PAREN_EXPRESSION_OP, parseError(), PROPERTY_ASSIGNMENT, PROPERTY_EXPRESSION, PROPERTY_EXPRESSION_FUNC, PROPERTY_EXPRESSION_OP, STATEMENT, true, TYPE_ADD_OP, TYPE_BIN_OP, TYPE_BRACE_CLOSE, TYPE_BRACE_OPEN, TYPE_COLON, TYPE_COMMA, TYPE_DO, TYPE_FUNC, TYPE_HOOK, TYPE_IF, TYPE_INCR_OP, TYPE_LITERAL, TYPE_PAREN_CLOSE, TYPE_PAREN_OPEN, TYPE_RETURN, TYPE_SEMICOLON, and TYPE_UN_OP.

Referenced by ResourceLoader\applyFilter(), MinifyScript\minify(), JavaScriptMinifierTest\testExponentLineBreaking(), and JavaScriptMinifierTest\testMinifyOutput().

◆ parseError()

static JavaScriptMinifier::parseError (   $fullJavascript,
  $position,
  $errorMsg 
)
static

Definition at line 627 of file JavaScriptMinifier.php.

Referenced by minify().

Member Data Documentation

◆ CONDITION

const JavaScriptMinifier::CONDITION = 1

Definition at line 27 of file JavaScriptMinifier.php.

Referenced by minify().

◆ EXPRESSION

const JavaScriptMinifier::EXPRESSION = 3

Definition at line 29 of file JavaScriptMinifier.php.

Referenced by minify().

◆ EXPRESSION_FUNC

const JavaScriptMinifier::EXPRESSION_FUNC = 6

Definition at line 32 of file JavaScriptMinifier.php.

Referenced by minify().

◆ EXPRESSION_NO_NL

const JavaScriptMinifier::EXPRESSION_NO_NL = 4

Definition at line 30 of file JavaScriptMinifier.php.

Referenced by minify().

◆ EXPRESSION_OP

const JavaScriptMinifier::EXPRESSION_OP = 5

Definition at line 31 of file JavaScriptMinifier.php.

Referenced by minify().

◆ EXPRESSION_TERNARY

const JavaScriptMinifier::EXPRESSION_TERNARY = 7

Definition at line 33 of file JavaScriptMinifier.php.

Referenced by minify().

◆ EXPRESSION_TERNARY_FUNC

const JavaScriptMinifier::EXPRESSION_TERNARY_FUNC = 9

Definition at line 35 of file JavaScriptMinifier.php.

Referenced by minify().

◆ EXPRESSION_TERNARY_OP

const JavaScriptMinifier::EXPRESSION_TERNARY_OP = 8

Definition at line 34 of file JavaScriptMinifier.php.

Referenced by minify().

◆ MAX_LINE_LENGTH

const JavaScriptMinifier::MAX_LINE_LENGTH = 1000

NOTE: This isn't a strict maximum.

Longer lines will be produced when literals (e.g. quoted strings) longer than this are encountered or when required to guard against semicolon insertion.

Definition at line 70 of file JavaScriptMinifier.php.

◆ PAREN_EXPRESSION

const JavaScriptMinifier::PAREN_EXPRESSION = 10

Definition at line 36 of file JavaScriptMinifier.php.

Referenced by minify().

◆ PAREN_EXPRESSION_FUNC

const JavaScriptMinifier::PAREN_EXPRESSION_FUNC = 12

Definition at line 38 of file JavaScriptMinifier.php.

Referenced by minify().

◆ PAREN_EXPRESSION_OP

const JavaScriptMinifier::PAREN_EXPRESSION_OP = 11

Definition at line 37 of file JavaScriptMinifier.php.

Referenced by minify().

◆ PROPERTY_ASSIGNMENT

const JavaScriptMinifier::PROPERTY_ASSIGNMENT = 2

Definition at line 28 of file JavaScriptMinifier.php.

Referenced by minify().

◆ PROPERTY_EXPRESSION

const JavaScriptMinifier::PROPERTY_EXPRESSION = 13

Definition at line 39 of file JavaScriptMinifier.php.

Referenced by minify().

◆ PROPERTY_EXPRESSION_FUNC

const JavaScriptMinifier::PROPERTY_EXPRESSION_FUNC = 15

Definition at line 41 of file JavaScriptMinifier.php.

Referenced by minify().

◆ PROPERTY_EXPRESSION_OP

const JavaScriptMinifier::PROPERTY_EXPRESSION_OP = 14

Definition at line 40 of file JavaScriptMinifier.php.

Referenced by minify().

◆ STACK_LIMIT

const JavaScriptMinifier::STACK_LIMIT = 1000

Definition at line 63 of file JavaScriptMinifier.php.

◆ STATEMENT

const JavaScriptMinifier::STATEMENT = 0

Definition at line 26 of file JavaScriptMinifier.php.

Referenced by minify().

◆ TYPE_ADD_OP

const JavaScriptMinifier::TYPE_ADD_OP = 4

Definition at line 47 of file JavaScriptMinifier.php.

Referenced by minify().

◆ TYPE_BIN_OP

const JavaScriptMinifier::TYPE_BIN_OP = 3

Definition at line 46 of file JavaScriptMinifier.php.

Referenced by minify().

◆ TYPE_BRACE_CLOSE

const JavaScriptMinifier::TYPE_BRACE_CLOSE = 10

Definition at line 53 of file JavaScriptMinifier.php.

Referenced by minify().

◆ TYPE_BRACE_OPEN

const JavaScriptMinifier::TYPE_BRACE_OPEN = 9

Definition at line 52 of file JavaScriptMinifier.php.

Referenced by minify().

◆ TYPE_COLON

const JavaScriptMinifier::TYPE_COLON = 6

Definition at line 49 of file JavaScriptMinifier.php.

Referenced by minify().

◆ TYPE_COMMA

const JavaScriptMinifier::TYPE_COMMA = 7

Definition at line 50 of file JavaScriptMinifier.php.

Referenced by minify().

◆ TYPE_DO

const JavaScriptMinifier::TYPE_DO = 15

Definition at line 58 of file JavaScriptMinifier.php.

Referenced by minify().

◆ TYPE_FUNC

const JavaScriptMinifier::TYPE_FUNC = 16

Definition at line 59 of file JavaScriptMinifier.php.

Referenced by minify().

◆ TYPE_HOOK

const JavaScriptMinifier::TYPE_HOOK = 5

Definition at line 48 of file JavaScriptMinifier.php.

Referenced by minify().

◆ TYPE_IF

const JavaScriptMinifier::TYPE_IF = 14

Definition at line 57 of file JavaScriptMinifier.php.

Referenced by minify().

◆ TYPE_INCR_OP

const JavaScriptMinifier::TYPE_INCR_OP = 2

Definition at line 45 of file JavaScriptMinifier.php.

Referenced by minify().

◆ TYPE_LITERAL

const JavaScriptMinifier::TYPE_LITERAL = 17

Definition at line 60 of file JavaScriptMinifier.php.

Referenced by minify().

◆ TYPE_PAREN_CLOSE

const JavaScriptMinifier::TYPE_PAREN_CLOSE = 12

Definition at line 55 of file JavaScriptMinifier.php.

Referenced by minify().

◆ TYPE_PAREN_OPEN

const JavaScriptMinifier::TYPE_PAREN_OPEN = 11

Definition at line 54 of file JavaScriptMinifier.php.

Referenced by minify().

◆ TYPE_RETURN

const JavaScriptMinifier::TYPE_RETURN = 13

Definition at line 56 of file JavaScriptMinifier.php.

Referenced by minify().

◆ TYPE_SEMICOLON

const JavaScriptMinifier::TYPE_SEMICOLON = 8

Definition at line 51 of file JavaScriptMinifier.php.

Referenced by minify().

◆ TYPE_UN_OP

const JavaScriptMinifier::TYPE_UN_OP = 1

Definition at line 44 of file JavaScriptMinifier.php.

Referenced by minify().

The documentation for this class was generated from the following file: