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