49 lines
1.0 KiB
Go
49 lines
1.0 KiB
Go
package system
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import "git.tebibyte.media/tomo/tomo"
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type styleApplicator struct {
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style *tomo.Style
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role tomo.Role
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rules []*tomo.Rule
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}
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func (this *styleApplicator) apply (box anyBox) {
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if box.Role() != this.role {
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// the role has changed, so re-cache the list of rules
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this.rules = make([]*tomo.Rule, 0, 4)
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for _, rule := range this.style.Rules {
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role := box.Role()
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// blank fields match anything
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if rule.Role.Package == "" { role.Package = "" }
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if rule.Role.Object == "" { role.Object = "" }
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if rule.Role == role {
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this.rules = append(this.rules, &rule)
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}
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}
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}
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// compile list of attributes by searching through the cached ruleset
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attrs := make(tomo.AttrSet)
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for _, rule := range this.rules {
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satisifed := true
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if rule.Tags != nil {
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for _, tag := range rule.Tags {
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if !box.Tag(tag) {
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satisifed = false
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break
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}
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}
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}
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if satisifed {
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attrs.MergeOver(rule.Set)
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}
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}
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// apply that list of attributes
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for _, attr := range attrs {
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box.setAttr(attr, false)
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}
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}
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