63 lines
1.5 KiB
Go
63 lines
1.5 KiB
Go
package config
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// Config can return global configuration parameters.
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type Config interface {
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// HandleWidth returns how large grab handles should typically be. This
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// is important for accessibility reasons.
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HandleWidth () int
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// ScrollVelocity returns how many pixels should be scrolled every time
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// a scroll button is pressed.
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ScrollVelocity () int
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// ThemePath returns the directory path to the theme.
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ThemePath () string
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}
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// Default specifies default configuration values.
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type Default struct { }
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// HandleWidth returns the default handle width value.
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func (Default) HandleWidth () int {
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return 16
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}
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// ScrollVelocity returns the default scroll velocity value.
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func (Default) ScrollVelocity () int {
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return 16
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}
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// ThemePath returns the default theme path.
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func (Default) ThemePath () (string) {
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return ""
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}
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// Wrapped wraps a configuration and uses Default if it is nil.
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type Wrapped struct {
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Config
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}
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// HandleWidth returns how large grab handles should typically be. This
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// is important for accessibility reasons.
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func (wrapped Wrapped) HandleWidth () int {
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return wrapped.ensure().HandleWidth()
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}
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// ScrollVelocity returns how many pixels should be scrolled every time
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// a scroll button is pressed.
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func (wrapped Wrapped) ScrollVelocity () int {
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return wrapped.ensure().ScrollVelocity()
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}
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// ThemePath returns the directory path to the theme.
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func (wrapped Wrapped) ThemePath () string {
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return wrapped.ensure().ThemePath()
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}
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func (wrapped Wrapped) ensure () (real Config) {
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real = wrapped.Config
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if real == nil { real = Default { } }
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return
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}
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