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CSS::DOM::Value::Primitive - CSSPrimitiveValue class for CSS::DOM

CSS::DOM::Value::Primitive(3pm) User Contributed Perl Documentation CSS::DOM::Value::Primitive(3pm)

NAME

CSS::DOM::Value::Primitive - CSSPrimitiveValue class for CSS::DOM

VERSION

Version 0.16

SYNOPSIS

  # ...

DESCRIPTION

This module implements objects that represent CSS primitive property values (as opposed to lists). It implements the DOM CSSPrimitiveValue, Rect, and RGBColor interfaces.

METHODS

If you need the constructor, it's below the object methods. Normally you would get an object via CSS::DOM::Style's "getPropertyCSSValue" method.

CSSValue Interface

cssText
Returns a string representation of the attribute. Pass an argument to set it.
cssValueType
Returns "CSS::DOM::Value::CSS_PRIMITIVE_VALUE".

CSSPrimitiveValue Interface

primitiveType
Returns one of the "CONSTANTS" listed below.
getFloatValue
Returns a number if the value is numeric.
The rest have still to be implemented.

Rect Interface

The four methods "top", "right", "bottom" and "left" each return another value object representing the individual value.

RGBColor Interface

The four methods "red", "green", "blue" and "alpha" each return another value object representing the individual value.

Constructor

You probably don't need to call this, but here it is anyway:
  $val = new CSS::DOM::Value::Primitive:: %args;
The hash-style arguments are as follows. Only "type" and "value" are required.
type
One of the constants listed below under "CONSTANTS"
value
The data stored inside the value object. The format expected depends on the type. See below.
css
CSS code used for serialisation. This will make reading "cssText" faster at least until the value is modified.
owner
The style object that owns this value; if this is omitted, then the value is read-only. The value object holds a weak reference to the owner.
property
The name of the CSS property to which this value belongs. "cssText" uses this to determine how to parse text passed to it. This does not apply to the sub-values of colours, counters and rects, but it does apply to individual elements of a list value.
index
The index of this value within a list value (only applies to elements of a list, of course).
format
This is used by sub-values of colours and rects. It determines how assignment to "cssText" is handled. This uses the same syntax as the formats in CSS::DOM::PropertyParser.
Here are the formats for the "value" argument, which depend on the type:
CSS_UNKNOWN
A string of CSS code.
CSS_NUMBER, CSS_PERCENTAGE
A simple scalar containing a number.
Standard Dimensions
Also a simple scalar containing a number.
 
This applies to "CSS_EMS", "CSS_EXS", "CSS_PX", "CSS_CM", "CSS_MM", "CSS_IN", "CSS_PT", "CSS_PC", "CSS_DEG", "CSS_RAD", "CSS_GRAD", "CSS_MS", "CSS_S", "CSS_HZ" and "CSS_KHZ".
CSS_DIMENSION
An array ref: "[$number, $unit_text]"
CSS_STRING
A simple scalar containing a string (not a CSS string literal; i.e., no quotes or escapes).
CSS_URI
The URL (not a CSS literal)
CSS_IDENT
A string (no escapes)
CSS_ATTR
A string containing the name of the attribute.
CSS_COUNTER
An array ref: "[$name, $separator, $style]"
 
$separator and $style may each be "undef". If $separator is "undef", the object represents a "counter(...)". Otherwise it represents "counters(...)".
CSS_RECT
An array ref: "[$top, $right, $bottom, $left]"
 
The four elements are either CSSValue objects or array refs of arguments to be passed to the constructor. E.g.:
 
 [
     [type => CSS_PX, value => 20],
     [type => CSS_PERCENTAGE, value => 50],
     [type => CSS_PERCENTAGE, value => 50],
     [type => CSS_PX, value => 50],
 ]
    
 
When these array refs are converted to objects, the "format" argument is supplied automatically, so you do not need to include it here.
CSS_RGBCOLOR
A string beginning with '#', with no escapes (such as '#fff' or '#c0ffee'), a colour name (like red) or an array ref with three to four elements:
 
 [$r, $g, $b]
 [$r, $g, $b, $alpha]
    
 
The elements are either CSSValue objects or array refs of argument lists, as with "CSS_RECT".

CONSTANTS

The following constants can be imported with "use CSS::DOM::Value::Primitive ':all'". They represent the type of primitive value.
CSS_UNKNOWN
CSS_NUMBER
CSS_PERCENTAGE
CSS_EMS
CSS_EXS
CSS_PX
CSS_CM
CSS_MM
CSS_IN
CSS_PT
CSS_PC
CSS_DEG
CSS_RAD
CSS_GRAD
CSS_MS
CSS_S
CSS_HZ
CSS_KHZ
CSS_DIMENSION
CSS_STRING
CSS_URI
CSS_IDENT
CSS_ATTR
CSS_COUNTER
CSS_RECT
CSS_RGBCOLOR

SEE ALSO

CSS::DOM
CSS::DOM::Value
CSS::DOM::Value::List
CSS::DOM::Style
2015-11-29 perl v5.20.2