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tomo-old/theme/theme.go

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package theme
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import "image"
import "image/color"
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import "golang.org/x/image/font"
import "git.tebibyte.media/sashakoshka/tomo/artist"
import "git.tebibyte.media/sashakoshka/tomo/canvas"
// IconSize is a type representing valid icon sizes.
type IconSize int
const (
IconSizeSmall IconSize = 16
IconSizeLarge IconSize = 48
)
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// Pattern lists a number of cannonical pattern types, each with its own ID.
// This allows custom elements to follow themes, even those that do not
// explicitly support them.
type Pattern int; const (
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// PatternBackground is the window background of the theme. It appears
// in things like containers and behind text.
PatternBackground Pattern = iota
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// PatternDead is a pattern that is displayed on a "dead area" where no
// controls exist, but there still must be some indication of visual
// structure (such as in the corner between two scroll bars).
PatternDead
// PatternRaised is a generic raised pattern.
PatternRaised
// PatternSunken is a generic sunken pattern.
PatternSunken
// PatternPinboard is similar to PatternSunken, but it is textured.
PatternPinboard
// PatternButton is a button pattern.
PatternButton
// PatternInput is a pattern for input fields, editable text areas, etc.
PatternInput
// PatternGutter is a track for things to slide on.
PatternGutter
// PatternHandle is a handle that slides along a gutter.
PatternHandle
// PatternLine is an engraved line that separates things.
PatternLine
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// PatternMercury is a fill pattern for progress bars, meters, etc.
PatternMercury
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)
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type Color int; const (
// ColorAccent is the accent color of the theme.
ColorAccent Color = iota
// ColorForeground is the text/icon color of the theme.
ColorForeground
)
// Hints specifies rendering hints for a particular pattern. Elements can take
// these into account in order to gain extra performance.
type Hints struct {
// StaticInset defines an inset rectangular area in the middle of the
// pattern that does not change between PatternStates. If the inset is
// zero on all sides, this hint does not apply.
StaticInset artist.Inset
// Uniform specifies a singular color for the entire pattern. If the
// alpha channel is zero, this hint does not apply.
Uniform color.RGBA
}
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// Theme represents a visual style configuration,
type Theme interface {
// FontFace returns the proper font for a given style, size, and case.
FontFace (FontStyle, FontSize, Case) font.Face
// Icon returns an appropriate icon given an icon name, size, and case.
Icon (string, IconSize, Case) canvas.Image
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// Pattern returns an appropriate pattern given a pattern name, case,
// and state.
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Pattern (Pattern, State, Case) artist.Pattern
// Color returns an appropriate pattern given a color name, case, and
// state.
Color (Color, State, Case) color.RGBA
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// Padding returns how much space should be between the bounds of a
// pattern whatever an element draws inside of it.
Padding (Pattern, Case) artist.Inset
// Margin returns the left/right (x) and top/bottom (y) margins that
// should be put between any self-contained objects drawn within this
// pattern (if applicable).
Margin (Pattern, Case) image.Point
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// Sink returns a vector that should be added to an element's inner
// content when it is pressed down (if applicable) to simulate a 3D
// sinking effect.
Sink (Pattern, Case) image.Point
// Hints returns rendering optimization hints for a particular pattern.
// These are optional, but following them may result in improved
// performance.
Hints (Pattern, Case) Hints
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}