1 line
7.7 KiB
Plaintext
1 line
7.7 KiB
Plaintext
{"version":3,"file":"style-map.js","sources":["../../../src/directives/style-map.ts"],"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 CSS properties and values.\n *\n * The key should be either a valid CSS property name string, like\n * `'background-color'`, or a valid JavaScript camel case property name\n * for CSSStyleDeclaration like `backgroundColor`.\n */\nexport interface StyleInfo {\n [name: string]: string | number | undefined | null;\n}\n\nconst important = 'important';\n// The leading space is important\nconst importantFlag = ' !' + important;\n// How many characters to remove from a value, as a negative number\nconst flagTrim = 0 - importantFlag.length;\n\nclass StyleMapDirective extends Directive {\n _previousStyleProperties?: Set<string>;\n\n constructor(partInfo: PartInfo) {\n super(partInfo);\n if (\n partInfo.type !== PartType.ATTRIBUTE ||\n partInfo.name !== 'style' ||\n (partInfo.strings?.length as number) > 2\n ) {\n throw new Error(\n 'The `styleMap` directive must be used in the `style` attribute ' +\n 'and must be the only part in the attribute.'\n );\n }\n }\n\n render(styleInfo: Readonly<StyleInfo>) {\n return Object.keys(styleInfo).reduce((style, prop) => {\n const value = styleInfo[prop];\n if (value == null) {\n return style;\n }\n // Convert property names from camel-case to dash-case, i.e.:\n // `backgroundColor` -> `background-color`\n // Vendor-prefixed names need an extra `-` appended to front:\n // `webkitAppearance` -> `-webkit-appearance`\n // Exception is any property name containing a dash, including\n // custom properties; we assume these are already dash-cased i.e.:\n // `--my-button-color` --> `--my-button-color`\n prop = prop.includes('-')\n ? prop\n : prop\n .replace(/(?:^(webkit|moz|ms|o)|)(?=[A-Z])/g, '-$&')\n .toLowerCase();\n return style + `${prop}:${value};`;\n }, '');\n }\n\n override update(part: AttributePart, [styleInfo]: DirectiveParameters<this>) {\n const {style} = part.element as HTMLElement;\n\n if (this._previousStyleProperties === undefined) {\n this._previousStyleProperties = new Set();\n for (const name in styleInfo) {\n this._previousStyleProperties.add(name);\n }\n return this.render(styleInfo);\n }\n\n // Remove old properties that no longer exist in styleInfo\n // We use forEach() instead of for-of so that re don't require down-level\n // iteration.\n this._previousStyleProperties!.forEach((name) => {\n // If the name isn't in styleInfo or it's null/undefined\n if (styleInfo[name] == null) {\n this._previousStyleProperties!.delete(name);\n if (name.includes('-')) {\n style.removeProperty(name);\n } else {\n // Note reset using empty string (vs null) as IE11 does not always\n // reset via null (https://developer.mozilla.org/en-US/docs/Web/API/ElementCSSInlineStyle/style#setting_styles)\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n (style as any)[name] = '';\n }\n }\n });\n\n // Add or update properties\n for (const name in styleInfo) {\n const value = styleInfo[name];\n if (value != null) {\n this._previousStyleProperties.add(name);\n const isImportant =\n typeof value === 'string' && value.endsWith(importantFlag);\n if (name.includes('-') || isImportant) {\n style.setProperty(\n name,\n isImportant\n ? (value as string).slice(0, flagTrim)\n : (value as string),\n isImportant ? important : ''\n );\n } else {\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n (style as any)[name] = value;\n }\n }\n }\n return noChange;\n }\n}\n\n/**\n * A directive that applies CSS properties to an element.\n *\n * `styleMap` can only be used in the `style` attribute and must be the only\n * expression in the attribute. It takes the property names in the\n * {@link StyleInfo styleInfo} object and adds the properties to the inline\n * style of the element.\n *\n * Property names with dashes (`-`) are assumed to be valid CSS\n * property names and set on the element's style object using `setProperty()`.\n * Names without dashes are assumed to be camelCased JavaScript property names\n * and set on the element's style object using property assignment, allowing the\n * style object to translate JavaScript-style names to CSS property names.\n *\n * For example `styleMap({backgroundColor: 'red', 'border-top': '5px', '--size':\n * '0'})` sets the `background-color`, `border-top` and `--size` properties.\n *\n * @param styleInfo\n * @see {@link https://lit.dev/docs/templates/directives/#stylemap styleMap code samples on Lit.dev}\n */\nexport const styleMap = directive(StyleMapDirective);\n\n/**\n * The type of the class that powers this directive. Necessary for naming the\n * directive's return type.\n */\nexport type {StyleMapDirective};\n"],"names":[],"mappings":";;;AAAA;;;;AAIG;AAsBH,MAAM,SAAS,GAAG,WAAW,CAAC;AAC9B;AACA,MAAM,aAAa,GAAG,IAAI,GAAG,SAAS,CAAC;AACvC;AACA,MAAM,QAAQ,GAAG,CAAC,GAAG,aAAa,CAAC,MAAM,CAAC;AAE1C,MAAM,iBAAkB,SAAQ,SAAS,CAAA;AAGvC,IAAA,WAAA,CAAY,QAAkB,EAAA;;QAC5B,KAAK,CAAC,QAAQ,CAAC,CAAC;AAChB,QAAA,IACE,QAAQ,CAAC,IAAI,KAAK,QAAQ,CAAC,SAAS;YACpC,QAAQ,CAAC,IAAI,KAAK,OAAO;YACzB,CAAC,CAAA,EAAA,GAAA,QAAQ,CAAC,OAAO,0CAAE,MAAiB,IAAG,CAAC,EACxC;YACA,MAAM,IAAI,KAAK,CACb,iEAAiE;AAC/D,gBAAA,6CAA6C,CAChD,CAAC;AACH,SAAA;KACF;AAED,IAAA,MAAM,CAAC,SAA8B,EAAA;AACnC,QAAA,OAAO,MAAM,CAAC,IAAI,CAAC,SAAS,CAAC,CAAC,MAAM,CAAC,CAAC,KAAK,EAAE,IAAI,KAAI;AACnD,YAAA,MAAM,KAAK,GAAG,SAAS,CAAC,IAAI,CAAC,CAAC;YAC9B,IAAI,KAAK,IAAI,IAAI,EAAE;AACjB,gBAAA,OAAO,KAAK,CAAC;AACd,aAAA;;;;;;;;AAQD,YAAA,IAAI,GAAG,IAAI,CAAC,QAAQ,CAAC,GAAG,CAAC;AACvB,kBAAE,IAAI;AACN,kBAAE,IAAI;AACD,qBAAA,OAAO,CAAC,mCAAmC,EAAE,KAAK,CAAC;AACnD,qBAAA,WAAW,EAAE,CAAC;AACrB,YAAA,OAAO,KAAK,GAAG,CAAA,EAAG,IAAI,CAAI,CAAA,EAAA,KAAK,GAAG,CAAC;SACpC,EAAE,EAAE,CAAC,CAAC;KACR;AAEQ,IAAA,MAAM,CAAC,IAAmB,EAAE,CAAC,SAAS,CAA4B,EAAA;AACzE,QAAA,MAAM,EAAC,KAAK,EAAC,GAAG,IAAI,CAAC,OAAsB,CAAC;AAE5C,QAAA,IAAI,IAAI,CAAC,wBAAwB,KAAK,SAAS,EAAE;AAC/C,YAAA,IAAI,CAAC,wBAAwB,GAAG,IAAI,GAAG,EAAE,CAAC;AAC1C,YAAA,KAAK,MAAM,IAAI,IAAI,SAAS,EAAE;AAC5B,gBAAA,IAAI,CAAC,wBAAwB,CAAC,GAAG,CAAC,IAAI,CAAC,CAAC;AACzC,aAAA;AACD,YAAA,OAAO,IAAI,CAAC,MAAM,CAAC,SAAS,CAAC,CAAC;AAC/B,SAAA;;;;QAKD,IAAI,CAAC,wBAAyB,CAAC,OAAO,CAAC,CAAC,IAAI,KAAI;;AAE9C,YAAA,IAAI,SAAS,CAAC,IAAI,CAAC,IAAI,IAAI,EAAE;AAC3B,gBAAA,IAAI,CAAC,wBAAyB,CAAC,MAAM,CAAC,IAAI,CAAC,CAAC;AAC5C,gBAAA,IAAI,IAAI,CAAC,QAAQ,CAAC,GAAG,CAAC,EAAE;AACtB,oBAAA,KAAK,CAAC,cAAc,CAAC,IAAI,CAAC,CAAC;AAC5B,iBAAA;AAAM,qBAAA;;;;AAIJ,oBAAA,KAAa,CAAC,IAAI,CAAC,GAAG,EAAE,CAAC;AAC3B,iBAAA;AACF,aAAA;AACH,SAAC,CAAC,CAAC;;AAGH,QAAA,KAAK,MAAM,IAAI,IAAI,SAAS,EAAE;AAC5B,YAAA,MAAM,KAAK,GAAG,SAAS,CAAC,IAAI,CAAC,CAAC;YAC9B,IAAI,KAAK,IAAI,IAAI,EAAE;AACjB,gBAAA,IAAI,CAAC,wBAAwB,CAAC,GAAG,CAAC,IAAI,CAAC,CAAC;AACxC,gBAAA,MAAM,WAAW,GACf,OAAO,KAAK,KAAK,QAAQ,IAAI,KAAK,CAAC,QAAQ,CAAC,aAAa,CAAC,CAAC;gBAC7D,IAAI,IAAI,CAAC,QAAQ,CAAC,GAAG,CAAC,IAAI,WAAW,EAAE;AACrC,oBAAA,KAAK,CAAC,WAAW,CACf,IAAI,EACJ,WAAW;0BACN,KAAgB,CAAC,KAAK,CAAC,CAAC,EAAE,QAAQ,CAAC;AACtC,0BAAG,KAAgB,EACrB,WAAW,GAAG,SAAS,GAAG,EAAE,CAC7B,CAAC;AACH,iBAAA;AAAM,qBAAA;;AAEJ,oBAAA,KAAa,CAAC,IAAI,CAAC,GAAG,KAAK,CAAC;AAC9B,iBAAA;AACF,aAAA;AACF,SAAA;AACD,QAAA,OAAO,QAAQ,CAAC;KACjB;AACF,CAAA;AAED;;;;;;;;;;;;;;;;;;;AAmBG;MACU,QAAQ,GAAG,SAAS,CAAC,iBAAiB;;;;"} |