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CssBuilder.kt
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CssBuilder.kt
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package kotlinx.css
fun CssBuilder(
indent: String = "",
allowClasses: Boolean = true,
parent: RuleContainer? = null,
isHolder: Boolean = false,
isStyledComponent: Boolean = false,
): CssBuilder = CssBuilderImpl(indent, allowClasses, parent, isHolder, isStyledComponent)
interface CssBuilder : StyledElement, RuleContainer {
val allowClasses: Boolean
var parent: RuleContainer?
val classes: MutableList<String>
val styleName: MutableList<String>
// Indicates that the builder holds CSS for further use (forwarding, etc.)
val isHolder: Boolean
// Indicates that the builder was created by kotlin-styled (legacy)
val isStyledComponent: Boolean
operator fun String.invoke(block: RuleSet) = rule(this, passStaticClassesToParent = false, block = block)
operator fun String.invoke(css: CssBuilder) = rule(this, passStaticClassesToParent = false, css = css)
operator fun TagSelector.invoke(block: RuleSet) = tagName(block)
// https://developer.mozilla.org/en/docs/Web/CSS/Pseudo-classes
// The experimental ones were omitted
fun active(block: RuleSet) = "&:active"(block)
fun checked(block: RuleSet) = "&:checked"(block)
fun default(block: RuleSet) = "&:default"(block)
fun defined(block: RuleSet) = "&:defined"(block)
fun disabled(block: RuleSet) = "&:disabled"(block)
fun empty(block: RuleSet) = "&:empty"(block)
fun enabled(block: RuleSet) = "&:enabled"(block)
fun firstChild(block: RuleSet) = "&:first-child"(block)
fun firstOfType(block: RuleSet) = "&:first-of-type"(block)
fun fullscreen(block: RuleSet) = "&:fullscreen"(block)
fun focus(block: RuleSet) = "&:focus"(block)
fun focusVisible(block: RuleSet) = "&:focus-visible"(block)
fun focusWithin(block: RuleSet) = "&:focus-within"(block)
fun hover(block: RuleSet) = "&:hover"(block)
fun indeterminate(block: RuleSet) = "&:indeterminate"(block)
fun inRange(block: RuleSet) = "&:in-range"(block)
fun invalid(block: RuleSet) = "&:invalid"(block)
fun lastChild(block: RuleSet) = "&:last-child"(block)
fun lastOfType(block: RuleSet) = "&:last-of-type"(block)
fun link(block: RuleSet) = "&:link"(block)
fun not(vararg selector: String, block: RuleSet): Rule {
// The verbosity is necessitated by an IR bug, do not inline!
val selectorString = selector.joinToString { "&:not($it)" }
return selectorString(block)
}
fun nthChild(vararg selector: String, block: RuleSet): Rule {
val selectorString = selector.joinToString { "&:nth-child($it)" }
return selectorString(block)
}
fun nthLastChild(vararg selector: String, block: RuleSet): Rule {
val selectorString = selector.joinToString { "&:nth-last-child($it)" }
return selectorString(block)
}
fun nthLastOfType(vararg selector: String, block: RuleSet): Rule {
val selectorString = selector.joinToString { "&:nth-last-of-type($it)" }
return selectorString(block)
}
fun nthOfType(vararg selector: String, block: RuleSet): Rule {
val selectorString = selector.joinToString { "&:nth-of-type($it)" }
return selectorString(block)
}
fun onlyChild(block: RuleSet) = "&:only-child"(block)
fun onlyOfType(block: RuleSet) = "&:only-of-type"(block)
fun optional(block: RuleSet) = "&:optional"(block)
fun outOfRange(block: RuleSet) = "&:out-of-range"(block)
fun placeholderShown(block: RuleSet) = "&:placeholder-shown"(block)
fun readOnly(block: RuleSet) = "&:read-only"(block)
fun readWrite(block: RuleSet) = "&:read-write"(block)
fun required(block: RuleSet) = "&:required"(block)
fun valid(block: RuleSet) = "&:valid"(block)
fun visited(block: RuleSet) = "&:visited"(block)
// Children & descendants
fun children(vararg selector: String = arrayOf("*"), block: RuleSet): Rule {
val selectorString = selector.joinToString { "& > $it" }
return selectorString(block)
}
fun descendants(vararg selector: String = arrayOf("*"), block: RuleSet): Rule {
val selectorString = selector.joinToString { "& $it" }
return selectorString(block)
}
fun dir(vararg selector: String, block: RuleSet): Rule {
val selectorString = selector.joinToString { "&:dir($it)" }
return selectorString(block)
}
fun has(vararg selector: String, block: RuleSet): Rule {
val selectorString = selector.joinToString { "&:has($it)" }
return selectorString(block)
}
fun host(vararg selector: String, block: RuleSet): Rule {
val selectorString = selector.joinToString { "&:host($it)" }
return selectorString(block)
}
fun hostContext(vararg selector: String, block: RuleSet): Rule {
val selectorString = selector.joinToString { "&:host-context($it)" }
return selectorString(block)
}
fun `is`(vararg selector: String, block: RuleSet): Rule {
val selectorString = selector.joinToString { "&:is($it)" }
return selectorString(block)
}
fun lang(vararg selector: String, block: RuleSet): Rule {
val selectorString = selector.joinToString { "&:lang($it)" }
return selectorString(block)
}
fun where(vararg selector: String, block: RuleSet): Rule {
val selectorString = selector.joinToString { "&:where($it)" }
return selectorString(block)
}
fun ancestorHover(vararg selector: String, block: RuleSet): Rule {
// https://github.com/styled-components/styled-components/issues/3244#issuecomment-687676703
val selectorRef = if (isStyledComponent) "&&" else "&"
val selectorString = selector.joinToString { "$it:hover $selectorRef" }
return selectorString(block)
}
// https://developer.mozilla.org/en/docs/Web/CSS/Pseudo-elements
fun after(block: RuleSet) = "&::after" {
content = "".quoted
block()
}
fun before(block: RuleSet) = "&::before" {
content = "".quoted
block()
}
fun firstLetter(block: RuleSet) = "&::first-letter"(block)
fun firstLine(block: RuleSet) = "&::first-line"(block)
fun placeholder(block: RuleSet) {
"&::placeholder"(block)
"&::-webkit-input-placeholder"(block) // Chrome, Opera, Safari
"&::-moz-placeholder"(block) // Firefox 19+
"&::-ms-input-placeholder"(block) // IE 10+
"&:-moz-placeholder"(block) // Firefox 18-
}
fun selection(block: RuleSet) = "&::selection"(block)
// Combinators
fun child(vararg selector: String, block: RuleSet): Rule {
val selectorString = selector.joinToString { "> $it" }
return selectorString(block)
}
fun child(vararg selector: String, css: CssBuilder): Rule {
val selectorString = selector.joinToString { "> $it" }
return selectorString(css)
}
fun sibling(vararg selector: String, block: RuleSet): Rule {
val selectorString = selector.joinToString { "~ $it" }
return selectorString(block)
}
fun adjacentSibling(vararg selector: String, block: RuleSet): Rule {
val selectorString = selector.joinToString { "+ $it" }
return selectorString(block)
}
// Universal selector
fun universal(block: RuleSet) = "*"(block)
operator fun compareTo(rule: Rule): Int {
// remove current rule
rules.removeAt(rules.lastIndex)
child(rule.selector, css = rule.css)
return 0
}
operator fun Rule.not() {
rules.removeAt(rules.lastIndex)
selector.replace(NOT_REGEX, "$1:not($2)")(css)
}
operator fun Rule.unaryPlus() {
rules.removeAt(rules.lastIndex)
"&.$selector"(css)
}
fun specific(specificity: Int = 2, block: RuleSet) = rule("&".repeat(specificity), passStaticClassesToParent = true, block = block)
fun prefix(vararg selector: String, block: RuleSet): Rule {
// https://github.com/styled-components/styled-components/issues/3244#issuecomment-687676703
val selectorRef = if (isStyledComponent) "&&" else "&"
val selectorString = selector.joinToString { "$it $selectorRef" }
return selectorString(block)
}
// https://developer.mozilla.org/en-US/docs/Web/CSS/At-rule
fun media(query: String, block: RuleSet) = "@media $query"(block)
fun supports(query: String, block: RuleSet) = "@supports $query"(block)
fun supportsSelector(query: String, block: RuleSet) = "@supports selector($query)"(block)
fun container(query: String, block: RuleSet) = "@container $query"(block)
fun container(container: ContainerName, query: String, block: RuleSet) = "@container $container $query"(block)
fun fontFace(block: RuleSet) = rule("@font-face", passStaticClassesToParent = false, repeatable = true, block = block)
fun retina(block: RuleSet) {
media("(-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi)") {
block()
}
}
// Custom properties
fun root(block: RuleSet) {
":root" {
block()
}
}
/**
* Add custom property to CSS [declarations]. If the variable name is in the camelCase, it turns it to snake-case
*/
fun setCustomProperty(name: String, value: CssValue) {
put("--$name", value.value)
}
// Functions
fun min(v1: LinearDimension, v2: LinearDimension): LinearDimension =
LinearDimension("min($v1, $v2)")
fun max(v1: LinearDimension, v2: LinearDimension): LinearDimension =
LinearDimension("max($v1, $v2)")
fun minmax(v1: LinearDimension, v2: LinearDimension): LinearDimension =
LinearDimension("minmax($v1, $v2)")
fun clamp(min: LinearDimension, preferred: LinearDimension, max: LinearDimension): LinearDimension =
LinearDimension("clamp($min, $preferred, $max)")
// Operator overrides
operator fun RuleSet.unaryPlus()
operator fun String.unaryPlus() = addClass(this)
operator fun Array<String>.unaryPlus() = this.forEach { addClass(it) }
operator fun Iterable<String>.unaryPlus() = this.forEach { addClass(it) }
private fun addClass(className: String) {
if (allowClasses) {
classes.add(className)
} else {
(parent as? CssBuilder)?.addClass(className)
}
}
fun append(other: CssBuilder) {
declarations.putAll(other.declarations)
other.classes.forEach(this::addClass)
styleName.addAll(other.styleName)
rules.addAll(other.rules)
multiRules.addAll(other.multiRules)
}
companion object {
private val NOT_REGEX by lazy { Regex("^(&?)(.*)$") }
}
}
typealias RuleSet = CssBuilder.() -> Unit
fun ruleSet(set: RuleSet) = set
fun String.toCustomProperty(): String {
return "var(--$this)"
}
open class CssBuilderImpl(
override val indent: String = "",
override val allowClasses: Boolean = true,
override var parent: RuleContainer? = null,
override val isHolder: Boolean = false,
override val isStyledComponent: Boolean = false,
) : CssBuilder {
override val classes = mutableListOf<String>()
override fun RuleSet.unaryPlus() = this()
override val declarations = CssDeclarations()
override val styleName = mutableListOf<String>()
override fun toString() = buildString {
append(declarations)
buildRules(indent)
}
private var memoizedHashCode: Int? = null
override fun hashCode(): Int {
return memoizedHashCode
?: (rules.sumOf { it.hashCode() } + multiRules.sumOf { it.hashCode() } + declarations.hashCode())
.also { hashCode -> memoizedHashCode = hashCode }
}
override fun equals(other: Any?) = this.calculateEquals(other) { otherCss ->
rules == otherCss.rules && multiRules == otherCss.multiRules && declarations == otherCss.declarations
}
override val rules = mutableListOf<Rule>()
override val multiRules = mutableListOf<Rule>()
}