style

package

v0.1.0 Latest Latest Go to latest Published: Oct 5, 2026 License: MIT Imports: 12 Imported by: 0

Details

Valid go.mod file
Redistributable license
Tagged version
Stable version
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Repository

github.com/RevoTale/esp32-e-paper-manager

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Documentation ¶

Overview ¶

Package style parses the engine's bounded inline CSS profile into typed values. It is manager-only and does not add parsing dependencies to TinyGo firmware.

Index ¶

Constants
Variables
type Block
- func Parse(source string, element uint32) (Block, error)
type Computed
- func Compute(tag string, block Block, parent *Computed, metrics Metrics) (Computed, error)
type Kind
type Length
- func ParseLength(source string) (Length, error)
- func (l Length) Resolve(metrics Metrics) (float64, error)
type Metrics
type Unit
type Value

Constants ¶

View Source

const MaxDeclarations = 4096

Variables ¶

View Source

var ErrValue = errors.New("style: invalid or unsupported value")

Functions ¶

This section is empty.

Types ¶

type Block ¶

type Block struct {
	// contains filtered or unexported fields
}

func Parse ¶

func Parse(source string, element uint32) (Block, error)

Parse consumes an inline declaration list, not selectors or a stylesheet. Parser recovery never turns invalid input into a partially applied scene. https://pkg.go.dev/github.com/tdewolff/parse/v2/css#NewParser

func (Block) Count ¶

func (b Block) Count() int

func (Block) Error ¶

func (b Block) Error(name string, code renderdiag.Code) error

Error retains the winning declaration's source range after shorthand/cascade. A generated semantic default has HTML identity but no fabricated CSS range.

func (Block) Get ¶

func (b Block) Get(name string) (Value, bool)

func (Block) WithDimensionHints ¶

func (b Block) WithDimensionHints(width, height float64) (Block, error)

WithDimensionHints applies HTML image width/height below inline declarations. Zero means absent. It preserves CSS source ranges and never changes b.

type Computed ¶

type Computed struct {
	// contains filtered or unexported fields
}

Computed owns resolved inheritance and font metrics for one element. Layout still resolves percentages and box-relative lengths against its containing box.

func Compute ¶

func Compute(tag string, block Block, parent *Computed, metrics Metrics) (Computed, error)

func (Computed) Color ¶

func (c Computed) Color(name string) color.NRGBA

func (Computed) FontSize ¶

func (c Computed) FontSize() float64

func (Computed) Get ¶

func (c Computed) Get(name string) Value

func (Computed) Keyword ¶

func (c Computed) Keyword(name string) string

func (Computed) Length ¶

func (c Computed) Length(name string) Length

func (Computed) Number ¶

func (c Computed) Number(name string) float64

func (Computed) RootFont ¶

func (c Computed) RootFont() float64

type Kind ¶

type Kind uint8

const (
	LengthValue Kind = iota + 1
	KeywordValue
	NumberValue
	ColorValue
	ImageValue
)

type Length ¶

type Length struct {
	Value float64
	Unit  Unit
}

func ParseLength ¶

func ParseLength(source string) (Length, error)

func (Length) Resolve ¶

func (l Length) Resolve(metrics Metrics) (float64, error)

type Metrics ¶

type Metrics struct {
	Containing, Font, RootFont, ViewportWidth, ViewportHeight float64
}

Metrics supplies the reference for this property, not a global percentage base. For font-size, Font is the inherited size (including root's initial size). https://www.w3.org/TR/css-values-3/#font-relative-lengths

type Unit ¶

type Unit uint8

const (
	Px Unit = iota
	Percent
	Em
	Rem
	VW
	VH
	Auto
	None
)

type Value ¶

type Value struct {
	Kind    Kind
	Length  Length
	Number  float64
	Color   color.NRGBA
	Keyword string
	Image   string
}

Value is a closed typed union, validated at Parse. A property's grammar determines its Kind; source strings never reach geometry or paint arithmetic.

Source Files ¶

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