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Static Public Member Functions | Public Attributes
JavaScriptMinifier Class Reference

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

List of all members.

Static Public Member Functions

static minify ($s, $statementsOnOwnLine=false, $maxLineLength=1000)
 Returns minified JavaScript code.
static parseError ($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 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

static JavaScriptMinifier::minify ( $  s,
$  statementsOnOwnLine = false,
$  maxLineLength = 1000 
) [static]

Returns minified JavaScript code.

NOTE: $maxLineLength isn't a strict maximum. Longer lines will be produced when literals (e.g. quoted strings) longer than $maxLineLength are encountered or when required to guard against semicolon insertion.

Parameters:
string$sJavaScript code to minify
bool$statementsOnOwnLineWhether to put each statement on its own line
int$maxLineLengthMaximum length of a single line, or -1 for no maximum.
Returns:
String Minified code

Definition at line 80 of file JavaScriptMinifier.php.

References $last, $out, $s, array(), parseError(), STATEMENT, and TYPE_LITERAL.

Referenced by JavaScriptMinifierTest\testBug32548Exponent(), and JavaScriptMinifierTest\testJavaScriptMinifierOutput().

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

Definition at line 602 of file JavaScriptMinifier.php.

Referenced by minify().

Member Data Documentation

const JavaScriptMinifier::CONDITION = 1

Definition at line 28 of file JavaScriptMinifier.php.

const JavaScriptMinifier::EXPRESSION = 3

Definition at line 30 of file JavaScriptMinifier.php.

const JavaScriptMinifier::EXPRESSION_FUNC = 6

Definition at line 33 of file JavaScriptMinifier.php.

const JavaScriptMinifier::EXPRESSION_NO_NL = 4

Definition at line 31 of file JavaScriptMinifier.php.

const JavaScriptMinifier::EXPRESSION_OP = 5

Definition at line 32 of file JavaScriptMinifier.php.

const JavaScriptMinifier::EXPRESSION_TERNARY = 7

Definition at line 34 of file JavaScriptMinifier.php.

const JavaScriptMinifier::EXPRESSION_TERNARY_FUNC = 9

Definition at line 36 of file JavaScriptMinifier.php.

const JavaScriptMinifier::EXPRESSION_TERNARY_OP = 8

Definition at line 35 of file JavaScriptMinifier.php.

const JavaScriptMinifier::PAREN_EXPRESSION = 10

Definition at line 37 of file JavaScriptMinifier.php.

const JavaScriptMinifier::PAREN_EXPRESSION_FUNC = 12

Definition at line 39 of file JavaScriptMinifier.php.

const JavaScriptMinifier::PAREN_EXPRESSION_OP = 11

Definition at line 38 of file JavaScriptMinifier.php.

const JavaScriptMinifier::PROPERTY_ASSIGNMENT = 2

Definition at line 29 of file JavaScriptMinifier.php.

const JavaScriptMinifier::PROPERTY_EXPRESSION = 13

Definition at line 40 of file JavaScriptMinifier.php.

const JavaScriptMinifier::PROPERTY_EXPRESSION_FUNC = 15

Definition at line 42 of file JavaScriptMinifier.php.

const JavaScriptMinifier::PROPERTY_EXPRESSION_OP = 14

Definition at line 41 of file JavaScriptMinifier.php.

const JavaScriptMinifier::STACK_LIMIT = 1000

Definition at line 64 of file JavaScriptMinifier.php.

const JavaScriptMinifier::STATEMENT = 0

Definition at line 27 of file JavaScriptMinifier.php.

Referenced by minify().

const JavaScriptMinifier::TYPE_ADD_OP = 4

Definition at line 48 of file JavaScriptMinifier.php.

const JavaScriptMinifier::TYPE_BIN_OP = 3

Definition at line 47 of file JavaScriptMinifier.php.

const JavaScriptMinifier::TYPE_BRACE_CLOSE = 10

Definition at line 54 of file JavaScriptMinifier.php.

const JavaScriptMinifier::TYPE_BRACE_OPEN = 9

Definition at line 53 of file JavaScriptMinifier.php.

const JavaScriptMinifier::TYPE_COLON = 6

Definition at line 50 of file JavaScriptMinifier.php.

const JavaScriptMinifier::TYPE_COMMA = 7

Definition at line 51 of file JavaScriptMinifier.php.

const JavaScriptMinifier::TYPE_DO = 15

Definition at line 59 of file JavaScriptMinifier.php.

const JavaScriptMinifier::TYPE_FUNC = 16

Definition at line 60 of file JavaScriptMinifier.php.

const JavaScriptMinifier::TYPE_HOOK = 5

Definition at line 49 of file JavaScriptMinifier.php.

const JavaScriptMinifier::TYPE_IF = 14

Definition at line 58 of file JavaScriptMinifier.php.

const JavaScriptMinifier::TYPE_INCR_OP = 2

Definition at line 46 of file JavaScriptMinifier.php.

const JavaScriptMinifier::TYPE_LITERAL = 17

Definition at line 61 of file JavaScriptMinifier.php.

Referenced by minify().

const JavaScriptMinifier::TYPE_PAREN_CLOSE = 12

Definition at line 56 of file JavaScriptMinifier.php.

const JavaScriptMinifier::TYPE_PAREN_OPEN = 11

Definition at line 55 of file JavaScriptMinifier.php.

const JavaScriptMinifier::TYPE_RETURN = 13

Definition at line 57 of file JavaScriptMinifier.php.

const JavaScriptMinifier::TYPE_SEMICOLON = 8

Definition at line 52 of file JavaScriptMinifier.php.

const JavaScriptMinifier::TYPE_UN_OP = 1

Definition at line 45 of file JavaScriptMinifier.php.

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