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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| import type vite from '../vite'; | ||
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| import htmlparser2 from 'htmlparser2'; | ||
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| /** Inject tags into HTML */ | ||
| export function injectTags(html: string, tags: vite.HtmlTagDescriptor[]): string { | ||
| // TODO: this usually takes 5ms or less, but if it becomes a bottleneck we can create a WeakMap cache | ||
| let output = html; | ||
| if (!tags.length) return output; | ||
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| const pos = { 'head-prepend': -1, head: -1, 'body-prepend': -1, body: -1 }; | ||
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| try { | ||
| // parse html | ||
| const parser = new htmlparser2.Parser({ | ||
| onopentag(tagname) { | ||
| if (tagname === 'head') pos['head-prepend'] = parser.endIndex + 1; | ||
| if (tagname === 'body') pos['body-prepend'] = parser.endIndex + 1; | ||
| }, | ||
| onclosetag(tagname) { | ||
| if (tagname === 'head') pos['head'] = parser.startIndex; | ||
| if (tagname === 'body') pos['body'] = parser.startIndex; | ||
| }, | ||
| }); | ||
| parser.write(html); | ||
| parser.end(); | ||
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| // inject | ||
| const lastToFirst = Object.entries(pos).sort((a, b) => b[1] - a[1]); | ||
| lastToFirst.forEach(([name, i]) => { | ||
| let selected = tags.filter(({ injectTo }) => { | ||
| if (name === 'head-prepend' && !injectTo) { | ||
| return true; // "head-prepend" is the default | ||
| } else { | ||
| return injectTo === name; | ||
| } | ||
| }); | ||
| if (!selected.length) return; | ||
| output = output.substring(0, i) + serializeTags(selected) + html.substring(i); | ||
| }); | ||
| } catch (err) { | ||
| // on invalid HTML, do nothing | ||
| } | ||
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| return output; | ||
| } | ||
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| // Everything below © Vite | ||
| // https://github.com/vitejs/vite/blob/main/packages/vite/src/node/plugins/html.ts | ||
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| // Vite is released under the MIT license: | ||
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| // MIT License | ||
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| // Copyright (c) 2019-present, Yuxi (Evan) You and Vite contributors | ||
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| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
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| // The above copyright notice and this permission notice shall be included in all | ||
| // copies or substantial portions of the Software. | ||
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| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| // SOFTWARE. | ||
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| const unaryTags = new Set(['link', 'meta', 'base']); | ||
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| function serializeTag({ tag, attrs, children }: vite.HtmlTagDescriptor, indent = ''): string { | ||
| if (unaryTags.has(tag)) { | ||
| return `<${tag}${serializeAttrs(attrs)}>`; | ||
| } else { | ||
| return `<${tag}${serializeAttrs(attrs)}>${serializeTags(children, incrementIndent(indent))}</${tag}>`; | ||
| } | ||
| } | ||
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| function serializeTags(tags: vite.HtmlTagDescriptor['children'], indent = ''): string { | ||
| if (typeof tags === 'string') { | ||
| return tags; | ||
| } else if (tags && tags.length) { | ||
| return tags.map((tag) => `${indent}${serializeTag(tag, indent)}\n`).join(''); | ||
| } | ||
| return ''; | ||
| } | ||
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| function serializeAttrs(attrs: vite.HtmlTagDescriptor['attrs']): string { | ||
| let res = ''; | ||
| for (const key in attrs) { | ||
| if (typeof attrs[key] === 'boolean') { | ||
| res += attrs[key] ? ` ${key}` : ``; | ||
| } else { | ||
| res += ` ${key}=${JSON.stringify(attrs[key])}`; | ||
| } | ||
| } | ||
| return res; | ||
| } | ||
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| function incrementIndent(indent = '') { | ||
| return `${indent}${indent[0] === '\t' ? '\t' : ' '}`; | ||
| } |
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