CSS::DOM::Value::Primitive - CSSPrimitiveValue class for CSS::DOM
Version 0.17
# ...
This module implements objects that represent CSS primitive property values (as opposed to lists). It implements the DOM CSSPrimitiveValue, Rect, and RGBColor interfaces.
If you need the constructor, it's below the object methods. Normally you would get an object via CSS::DOM::Style's getPropertyCSSValue method.
getPropertyCSSValue
Returns a string representation of the attribute. Pass an argument to set it.
Returns CSS::DOM::Value::CSS_PRIMITIVE_VALUE.
CSS::DOM::Value::CSS_PRIMITIVE_VALUE
Returns one of the "CONSTANTS" listed below.
Returns a number if the value is numeric.
The rest have still to be implemented.
The four methods top, right, bottom and left each return another value object representing the individual value.
top
right
bottom
left
The four methods red, green, blue and alpha each return another value object representing the individual value.
red
green
blue
alpha
You probably don't need to call this, but here it is anyway:
$val = new CSS::DOM::Value::Primitive:: %args;
The hash-style arguments are as follows. Only type and value are required.
type
value
One of the constants listed below under "CONSTANTS"
The data stored inside the value object. The format expected depends on the type. See below.
CSS code used for serialisation. This will make reading cssText faster at least until the value is modified.
cssText
The style object that owns this value; if this is omitted, then the value is read-only. The value object holds a weak reference to the owner.
The name of the CSS property to which this value belongs. cssText uses this to determine how to parse text passed to it. This does not apply to the sub-values of colours, counters and rects, but it does apply to individual elements of a list value.
The index of this value within a list value (only applies to elements of a list, of course).
This is used by sub-values of colours and rects. It determines how assignment to cssText is handled. This uses the same syntax as the formats in CSS::DOM::PropertyParser.
Here are the formats for the value argument, which depend on the type:
A string of CSS code.
A simple scalar containing a number.
Also a simple scalar containing a number.
This applies to CSS_EMS, CSS_EXS, CSS_PX, CSS_CM, CSS_MM, CSS_IN, CSS_PT, CSS_PC, CSS_DEG, CSS_RAD, CSS_GRAD, CSS_MS, CSS_S, CSS_HZ and CSS_KHZ.
CSS_EMS
CSS_EXS
CSS_PX
CSS_CM
CSS_MM
CSS_IN
CSS_PT
CSS_PC
CSS_DEG
CSS_RAD
CSS_GRAD
CSS_MS
CSS_S
CSS_HZ
CSS_KHZ
An array ref: [$number, $unit_text]
[$number, $unit_text]
A simple scalar containing a string (not a CSS string literal; i.e., no quotes or escapes).
The URL (not a CSS literal)
A string (no escapes)
A string containing the name of the attribute.
An array ref: [$name, $separator, $style]
[$name, $separator, $style]
$separator and $style may each be undef. If $separator is undef, the object represents a counter(...). Otherwise it represents counters(...).
$separator
$style
undef
counter(...)
counters(...)
An array ref: [$top, $right, $bottom, $left]
[$top, $right, $bottom, $left]
The four elements are either CSSValue objects or array refs of arguments to be passed to the constructor. E.g.:
[ [type => CSS_PX, value => 20], [type => CSS_PERCENTAGE, value => 50], [type => CSS_PERCENTAGE, value => 50], [type => CSS_PX, value => 50], ]
When these array refs are converted to objects, the format argument is supplied automatically, so you do not need to include it here.
format
A string beginning with '#', with no escapes (such as '#fff' or '#c0ffee'), a colour name (like red) or an array ref with three to four elements:
[$r, $g, $b] [$r, $g, $b, $alpha]
The elements are either CSSValue objects or array refs of argument lists, as with CSS_RECT.
CSS_RECT
The following constants can be imported with use CSS::DOM::Value::Primitive ':all'. They represent the type of primitive value.
use CSS::DOM::Value::Primitive ':all'
CSS::DOM
CSS::DOM::Value
CSS::DOM::Value::List
CSS::DOM::Style
To install CSS::DOM, copy and paste the appropriate command in to your terminal.
cpanm
cpanm CSS::DOM
CPAN shell
perl -MCPAN -e shell install CSS::DOM
For more information on module installation, please visit the detailed CPAN module installation guide.