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{"version":3,"file":"class-map.js","sourceRoot":"","sources":["../../src/directives/class-map.ts"],"names":[],"mappings":"AAAA;;;;GAIG;AAEH,OAAO,EAAgB,QAAQ,EAAC,MAAM,gBAAgB,CAAC;AACvD,OAAO,EACL,SAAS,EACT,SAAS,EAGT,QAAQ,GACT,MAAM,iBAAiB,CAAC;AASzB,MAAM,iBAAkB,SAAQ,SAAS;IAQvC,YAAY,QAAkB;;QAC5B,KAAK,CAAC,QAAQ,CAAC,CAAC;QAChB,IACE,QAAQ,CAAC,IAAI,KAAK,QAAQ,CAAC,SAAS;YACpC,QAAQ,CAAC,IAAI,KAAK,OAAO;YACzB,CAAC,MAAA,QAAQ,CAAC,OAAO,0CAAE,MAAiB,IAAG,CAAC,EACxC;YACA,MAAM,IAAI,KAAK,CACb,yDAAyD;gBACvD,6CAA6C,CAChD,CAAC;SACH;IACH,CAAC;IAED,MAAM,CAAC,SAAoB;QACzB,sDAAsD;QACtD,OAAO,CACL,GAAG;YACH,MAAM,CAAC,IAAI,CAAC,SAAS,CAAC;iBACnB,MAAM,CAAC,CAAC,GAAG,EAAE,EAAE,CAAC,SAAS,CAAC,GAAG,CAAC,CAAC;iBAC/B,IAAI,CAAC,GAAG,CAAC;YACZ,GAAG,CACJ,CAAC;IACJ,CAAC;IAEQ,MAAM,CAAC,IAAmB,EAAE,CAAC,SAAS,CAA4B;;QACzE,+CAA+C;QAC/C,IAAI,IAAI,CAAC,gBAAgB,KAAK,SAAS,EAAE;YACvC,IAAI,CAAC,gBAAgB,GAAG,IAAI,GAAG,EAAE,CAAC;YAClC,IAAI,IAAI,CAAC,OAAO,KAAK,SAAS,EAAE;gBAC9B,IAAI,CAAC,cAAc,GAAG,IAAI,GAAG,CAC3B,IAAI,CAAC,OAAO;qBACT,IAAI,CAAC,GAAG,CAAC;qBACT,KAAK,CAAC,IAAI,CAAC;qBACX,MAAM,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC,CAAC,KAAK,EAAE,CAAC,CAC3B,CAAC;aACH;YACD,KAAK,MAAM,IAAI,IAAI,SAAS,EAAE;gBAC5B,IAAI,SAAS,CAAC,IAAI,CAAC,IAAI,CAAC,CAAA,MAAA,IAAI,CAAC,cAAc,0CAAE,GAAG,CAAC,IAAI,CAAC,CAAA,EAAE;oBACtD,IAAI,CAAC,gBAAgB,CAAC,GAAG,CAAC,IAAI,CAAC,CAAC;iBACjC;aACF;YACD,OAAO,IAAI,CAAC,MAAM,CAAC,SAAS,CAAC,CAAC;SAC/B;QAED,MAAM,SAAS,GAAG,IAAI,CAAC,OAAO,CAAC,SAAS,CAAC;QAEzC,0CAA0C;QAC1C,yEAAyE;QACzE,aAAa;QACb,IAAI,CAAC,gBAAgB,CAAC,OAAO,CAAC,CAAC,IAAI,EAAE,EAAE;YACrC,IAAI,CAAC,CAAC,IAAI,IAAI,SAAS,CAAC,EAAE;gBACxB,SAAS,CAAC,MAAM,CAAC,IAAI,CAAC,CAAC;gBACvB,IAAI,CAAC,gBAAiB,CAAC,MAAM,CAAC,IAAI,CAAC,CAAC;aACrC;QACH,CAAC,CAAC,CAAC;QAEH,sDAAsD;QACtD,KAAK,MAAM,IAAI,IAAI,SAAS,EAAE;YAC5B,sEAAsE;YACtE,6CAA6C;YAC7C,MAAM,KAAK,GAAG,CAAC,CAAC,SAAS,CAAC,IAAI,CAAC,CAAC;YAChC,IACE,KAAK,KAAK,IAAI,CAAC,gBAAgB,CAAC,GAAG,CAAC,IAAI,CAAC;gBACzC,CAAC,CAAA,MAAA,IAAI,CAAC,cAAc,0CAAE,GAAG,CAAC,IAAI,CAAC,CAAA,EAC/B;gBACA,IAAI,KAAK,EAAE;oBACT,SAAS,CAAC,GAAG,CAAC,IAAI,CAAC,CAAC;oBACpB,IAAI,CAAC,gBAAgB,CAAC,GAAG,CAAC,IAAI,CAAC,CAAC;iBACjC;qBAAM;oBACL,SAAS,CAAC,MAAM,CAAC,IAAI,CAAC,CAAC;oBACvB,IAAI,CAAC,gBAAgB,CAAC,MAAM,CAAC,IAAI,CAAC,CAAC;iBACpC;aACF;SACF;QACD,OAAO,QAAQ,CAAC;IAClB,CAAC;CACF;AAED;;;;;;;;;;;;;GAaG;AACH,MAAM,CAAC,MAAM,QAAQ,GAAG,SAAS,CAAC,iBAAiB,CAAC,CAAC","sourcesContent":["/**\n * @license\n * Copyright 2018 Google LLC\n * SPDX-License-Identifier: BSD-3-Clause\n */\n\nimport {AttributePart, noChange} from '../lit-html.js';\nimport {\n directive,\n Directive,\n DirectiveParameters,\n PartInfo,\n PartType,\n} from '../directive.js';\n\n/**\n * A key-value set of class names to truthy values.\n */\nexport interface ClassInfo {\n readonly [name: string]: string | boolean | number;\n}\n\nclass ClassMapDirective extends Directive {\n /**\n * Stores the ClassInfo object applied to a given AttributePart.\n * Used to unset existing values when a new ClassInfo object is applied.\n */\n private _previousClasses?: Set<string>;\n private _staticClasses?: Set<string>;\n\n constructor(partInfo: PartInfo) {\n super(partInfo);\n if (\n partInfo.type !== PartType.ATTRIBUTE ||\n partInfo.name !== 'class' ||\n (partInfo.strings?.length as number) > 2\n ) {\n throw new Error(\n '`classMap()` can only be used in the `class` attribute ' +\n 'and must be the only part in the attribute.'\n );\n }\n }\n\n render(classInfo: ClassInfo) {\n // Add spaces to ensure separation from static classes\n return (\n ' ' +\n Object.keys(classInfo)\n .filter((key) => classInfo[key])\n .join(' ') +\n ' '\n );\n }\n\n override update(part: AttributePart, [classInfo]: DirectiveParameters<this>) {\n // Remember dynamic classes on the first render\n if (this._previousClasses === undefined) {\n this._previousClasses = new Set();\n if (part.strings !== undefined) {\n this._staticClasses = new Set(\n part.strings\n .join(' ')\n .split(/\\s/)\n .filter((s) => s !== '')\n );\n }\n for (const name in classInfo) {\n if (classInfo[name] && !this._staticClasses?.has(name)) {\n this._previousClasses.add(name);\n }\n }\n return this.render(classInfo);\n }\n\n const classList = part.element.classList;\n\n // Remove old classes that no longer apply\n // We use forEach() instead of for-of so that we don't require down-level\n // iteration.\n this._previousClasses.forEach((name) => {\n if (!(name in classInfo)) {\n classList.remove(name);\n this._previousClasses!.delete(name);\n }\n });\n\n // Add or remove classes based on their classMap value\n for (const name in classInfo) {\n // We explicitly want a loose truthy check of `value` because it seems\n // more convenient that '' and 0 are skipped.\n const value = !!classInfo[name];\n if (\n value !== this._previousClasses.has(name) &&\n !this._staticClasses?.has(name)\n ) {\n if (value) {\n classList.add(name);\n this._previousClasses.add(name);\n } else {\n classList.remove(name);\n this._previousClasses.delete(name);\n }\n }\n }\n return noChange;\n }\n}\n\n/**\n * A directive that applies dynamic CSS classes.\n *\n * This must be used in the `class` attribute and must be the only part used in\n * the attribute. It takes each property in the `classInfo` argument and adds\n * the property name to the element's `classList` if the property value is\n * truthy; if the property value is falsey, the property name is removed from\n * the element's `class`.\n *\n * For example `{foo: bar}` applies the class `foo` if the value of `bar` is\n * truthy.\n *\n * @param classInfo\n */\nexport const classMap = directive(ClassMapDirective);\n\n/**\n * The type of the class that powers this directive. Necessary for naming the\n * directive's return type.\n */\nexport type {ClassMapDirective};\n"]} |