101 lines
3.2 KiB
Go
101 lines
3.2 KiB
Go
package theme
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import "image"
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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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// FontStyle specifies stylistic alterations to a font face.
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type FontStyle int; const (
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FontStyleRegular FontStyle = 0
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FontStyleBold FontStyle = 1
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FontStyleItalic FontStyle = 2
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FontStyleBoldItalic FontStyle = 1 | 2
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)
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// FontSize specifies the general size of a font face in a semantic way.
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type FontSize int; const (
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// FontSizeNormal is the default font size that should be used for most
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// things.
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FontSizeNormal FontSize = iota
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// FontSizeLarge is a larger font size suitable for things like section
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// headings.
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FontSizeLarge
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// FontSizeHuge is a very large font size suitable for things like
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// titles, wizard step names, digital clocks, etc.
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FontSizeHuge
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// FontSizeSmall is a smaller font size. Try not to use this unless it
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// makes a lot of sense to do so, because it can negatively impact
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// accessibility. It is useful for things like copyright notices at the
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// bottom of some window that the average user doesn't actually care
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// about.
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FontSizeSmall
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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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// PatternAccent is the accent color of the theme. It is safe to assume
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// that this is, by default, a solid color.
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PatternAccent Pattern = iota
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// PatternBackground is the background color of the theme. It is safe to
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// assume that this is, by default, a solid color.
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PatternBackground
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// PatternForeground is the foreground text color of the theme. It is
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// safe to assume that this is, by default, a solid color.
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PatternForeground
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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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// 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 and case.
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Icon (string, Case) artist.Pattern
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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, Case, PatternState) artist.Pattern
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// Inset returns the area on all sides of a given pattern that is not
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// meant to be drawn on.
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Inset (Pattern, Case) Inset
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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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}
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