Lessc Class Reference

lessphp v0.8.0 http://leafo.net/lessphp More...

Collaboration diagram for Lessc:

Public Member Functions
	compileValue ($value)
	Compiles a primitive value into a CSS property value.
	colorArgs ($args)
	Helper function to get arguments for color manipulation functions.
	__construct ($fname=null)
	Initialize any static state, can initialize parser for a file $opts isn't used yet.
	cachedCompile ($in, $force=false)
	Execute lessphp on a .less file or a lessphp cache structure.
	throwError ($msg=null)
	Uses the current value of $this->count to show line and line number.

Protected Member Functions
	fileExists ($name)
	fileExists
	compileBlock ($block)
	Recursively compiles a block.
	deduplicate ($lines)
	Deduplicate lines in a block.
	lib_data_uri ($value)
	Given an url, decide whether to output a regular link or the base64-encoded contents of the file.
	lib_tint ($args)
	Mix color with white in variable proportion.
	lib_shade ($args)
	Mix color with black in variable proportion.
	lib_mix ($args)
	lib_mix mixes two colors by weight mix(@color1, @color2, [@weight: 50%]); http://sass-lang.com/docs/yardoc/Sass/Script/Functions.html#mix-instance_method
	lib_contrast ($args)
	lib_contrast
	toRGB ($color)
	Converts a hsl array into a color value in rgb.
	funcToColor ($func)
	Convert the rgb, rgba, hsl color literals of function type as returned by the parser into values of color type.

Detailed Description

lessphp v0.8.0 http://leafo.net/lessphp

LESS CSS compiler, adapted from http://lesscss.org

Copyright 2013, Leaf Corcoran leafo.nosp@m.t@gm.nosp@m.ail.c.nosp@m.om Copyright (C) 2024 Frédéric France frede.nosp@m.ric..nosp@m.franc.nosp@m.e@fr.nosp@m.ee.fr Licensed under MIT or GPLv3, see LICENSE The LESS compiler and parser.

Converting LESS to CSS is a three stage process. The incoming file is parsed by lessc_parser into a syntax tree, then it is compiled into another tree representing the CSS structure by lessc. The CSS tree is fed into a formatter, like lessc_formatter which then outputs CSS as a string.

During the first compile, all values are reduced, which means that their types are brought to the lowest form before being dump as strings. This handles math equations, variable dereferences, and the like.

The parse function of lessc is the entry point.

In summary:

The lessc class creates an instance of the parser, feeds it LESS code, then transforms the resulting tree to a CSS tree. This class also holds the evaluation context, such as all available mixins and variables at any given time.

The lessc_parser class is only concerned with parsing its input.

The lessc_formatter takes a CSS tree, and dumps it to a formatted string, handling things like indentation.

Definition at line 41 of file lessc.class.php.

Member Function Documentation

cachedCompile()

Lessc::cachedCompile	(		$in,
			$force = false )

Execute lessphp on a .less file or a lessphp cache structure.

The lessphp cache structure contains information about a specific less file having been parsed. It can be used as a hint for future calls to determine whether or not a rebuild is required.

The cache structure contains two important keys that may be used externally:

compiled: The final compiled CSS updated: The time (in seconds) the CSS was last compiled

The cache structure is a plain-ol' PHP associative array and can be serialized and unserialized without a hitch.

Parameters

mixed	$in	Input
bool	$force	Force rebuild?

Returns

array|null lessphp cache structure

Definition at line 2287 of file lessc.class.php.

colorArgs()

Lessc::colorArgs

(

$args

)

Helper function to get arguments for color manipulation functions.

takes a list that contains a color like thing and a percentage

Definition at line 1222 of file lessc.class.php.

compileBlock()

Lessc::compileBlock ( $block )

protected

Recursively compiles a block.

A block is analogous to a CSS block in most cases. A single LESS document is encapsulated in a block when parsed, but it does not have parent tags so all of it's children appear on the root level when compiled.

Blocks are made up of props and children.

Props are property instructions, array tuples which describe an action to be taken, eg. write a property, set a variable, mixin a block.

The children of a block are just all the blocks that are defined within. This is used to look up mixins when performing a mixin.

Compiling the block involves pushing a fresh environment on the stack, and iterating through the props, compiling each one.

See Lessc\compileProp()

Definition at line 222 of file lessc.class.php.

References throwError().

compileValue()

Lessc::compileValue

(

$value

)

Compiles a primitive value into a CSS property value.

Values in lessphp are typed by being wrapped in arrays, their format is typically:

array(type, contents [, additional_contents]*)

The input is expected to be reduced. This function will not work on things like expressions and variables.

Definition at line 899 of file lessc.class.php.

References compileValue(), and throwError().

Referenced by compileValue().

deduplicate()

Lessc::deduplicate ( $lines )

protected

Deduplicate lines in a block.

Comments are not deduplicated. If a duplicate rule is detected, the comments immediately preceding each occurence are consolidated.

Definition at line 333 of file lessc.class.php.

fileExists()

Lessc::fileExists ( $name )

protected

fileExists

Parameters

string

$name

Filename

Returns

boolean

Definition at line 98 of file lessc.class.php.

lib_contrast()

Lessc::lib_contrast ( $args )

protected

lib_contrast

Parameters

array

$args

Args

Returns

array

Definition at line 1441 of file lessc.class.php.

lib_data_uri()

Lessc::lib_data_uri ( $value )

protected

Given an url, decide whether to output a regular link or the base64-encoded contents of the file.

Parameters

array

$value

either an argument list (two strings) or a single string

Returns

string formatted url(), either as a link or base64-encoded

Definition at line 1097 of file lessc.class.php.

lib_mix()

Lessc::lib_mix ( $args )

protected

lib_mix mixes two colors by weight mix(@color1, @color2, [@weight: 50%]); http://sass-lang.com/docs/yardoc/Sass/Script/Functions.html#mix-instance_method

Parameters

array

$args

Args

Returns

array

Definition at line 1397 of file lessc.class.php.

References throwError().

Referenced by lib_shade(), and lib_tint().

lib_shade()

Lessc::lib_shade ( $args )

protected

Mix color with black in variable proportion.

It is the same as calling mix(#000000, @color, @weight)

shade(@color, [@weight: 50%]);

http://lesscss.org/functions/#color-operations-shade

Returns

array Color

Definition at line 1375 of file lessc.class.php.

References lib_mix(), and throwError().

lib_tint()

Lessc::lib_tint ( $args )

protected

Mix color with white in variable proportion.

It is the same as calling mix(#ffffff, @color, @weight).

tint(@color, [@weight: 50%]);

http://lesscss.org/functions/#color-operations-tint

Returns

array Color

Definition at line 1351 of file lessc.class.php.

References lib_mix(), and throwError().

toRGB()

Lessc::toRGB ( $color )

protected

Converts a hsl array into a color value in rgb.

Expects H to be in range of 0 to 360, S and L in 0 to 100

Definition at line 1603 of file lessc.class.php.

Referenced by funcToColor().

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

• dolibarr_dev/htdocs/core/class/lessc.class.php