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syntax-tree · Jan 18, 2020 · 4d1a20c · 4d1a20c
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diff --git a/.editorconfig b/.editorconfig
@@ -0,0 +1,9 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1,6 @@
+.DS_Store
+*.log
+.nyc_output/
+coverage/
+node_modules/
+yarn.lock
diff --git a/.npmrc b/.npmrc
@@ -0,0 +1 @@
+package-lock=false
diff --git a/.prettierignore b/.prettierignore
@@ -0,0 +1 @@
+coverage/
diff --git a/.travis.yml b/.travis.yml
@@ -0,0 +1,5 @@
+language: node_js
+node_js:
+  - lts/dubnium
+  - node
+after_script: bash <(curl -s https://codecov.io/bash)
diff --git a/index.js b/index.js
@@ -0,0 +1,177 @@
+'use strict'
+
+var xtend = require('xtend')
+var zwitch = require('zwitch')
+var namespaces = require('web-namespaces')
+var html = require('property-information/html')
+var svg = require('property-information/svg')
+var find = require('property-information/find')
+var spaces = require('space-separated-tokens').stringify
+var commas = require('comma-separated-tokens').stringify
+var position = require('unist-util-position')
+
+module.exports = toXast
+
+var one = zwitch('type')
+
+one.invalid = invalid
+one.unknown = unknown
+one.handlers.root = root
+one.handlers.element = element
+one.handlers.text = text
+one.handlers.comment = comment
+one.handlers.doctype = doctype
+
+function invalid(value) {
+  throw new Error('Expected node, not `' + value + '`')
+}
+
+function unknown(value) {
+  throw new Error('Cannot transform node of type `' + value.type + '`')
+}
+
+function toXast(tree, options) {
+  var opts = typeof options === 'string' ? {space: options} : options || {}
+  var space = opts.space === 'svg' ? 'svg' : 'html'
+
+  return one(tree, {schema: space === 'svg' ? svg : html, ns: null})
+}
+
+function root(node, config) {
+  return patch(node, {type: 'root'}, config)
+}
+
+function text(node, config) {
+  return patch(node, {type: 'text', value: node.value || ''}, config)
+}
+
+function comment(node, config) {
+  return patch(node, {type: 'comment', value: node.value || ''}, config)
+}
+
+function doctype(node, config) {
+  return patch(
+    node,
+    {
+      type: 'doctype',
+      name: node.name || '',
+      public: node.public || undefined,
+      system: node.system || undefined
+    },
+    config
+  )
+}
+
+function element(node, parentConfig) {
+  var schema = parentConfig.schema
+  var name = node.tagName
+  var props = node.properties || {}
+  var xmlns = props.xmlns || null
+  var ns = namespaces[schema.space]
+  var attrs = {}
+  var config
+
+  if (xmlns) {
+    if (xmlns === namespaces.svg) {
+      schema = svg
+      ns = xmlns
+    } else if (xmlns === namespaces.html) {
+      schema = html
+      ns = xmlns
+    } else {
+      // We don’t support non-HTML, non-SVG namespaces, so stay in the same.
+    }
+  } else if (ns === namespaces.html && name === 'svg') {
+    schema = svg
+    ns = namespaces.svg
+  }
+
+  if (parentConfig.ns !== ns) {
+    attrs.xmlns = ns
+  }
+
+  config = xtend(parentConfig, {schema: schema, ns: ns})
+  attrs = xtend(attrs, toAttributes(props, config))
+
+  return patch(node, {type: 'element', name: name, attributes: attrs}, config)
+}
+
+function patch(origin, node, config) {
+  var pos = origin.position
+  var hastChildren = origin.children
+  var length
+  var children
+  var index
+
+  if (
+    config.ns === namespaces.html &&
+    origin.type === 'element' &&
+    origin.tagName === 'template'
+  ) {
+    node.children = root(origin.content, config).children
+  } else if (origin.type === 'element' || origin.type === 'root') {
+    length = hastChildren && hastChildren.length
+    children = []
+    index = -1
+
+    while (++index < length) {
+      children[index] = one(hastChildren[index], config)
+    }
+
+    node.children = children
+  }
+
+  if (pos) {
+    node.position = {
+      start: position.start(origin),
+      end: position.end(origin)
+    }
+  }
+
+  return node
+}
+
+function toAttributes(props, config) {
+  var attributes = {}
+  var value
+  var key
+  var info
+  var name
+
+  for (key in props) {
+    info = find(config.schema, key)
+    name = info.attribute
+    value = props[key]
+
+    // Ignore nully, false, and `NaN` values, and falsey known booleans.
+    if (
+      value === null ||
+      value === undefined ||
+      value === false ||
+      value !== value ||
+      (info.boolean && !value)
+    ) {
+      continue
+    }
+
+    // Accept `array`.
+    // Most props are space-separated.
+    if (typeof value === 'object' && 'length' in value) {
+      value = (info.commaSeparated ? commas : spaces)(value)
+    }
+
+    // Treat `true` and truthy known booleans.
+    if (value === true || info.boolean) {
+      value = ''
+    }
+
+    // Cast everything else to string.
+    if (typeof value !== 'string') {
+      value = String(value)
+    }
+
+    attributes[name] = value
+  }
+
+  return attributes
+}
diff --git a/license b/license
@@ -0,0 +1,22 @@
+(The MIT License)
+
+Copyright (c) 2020 Titus Wormer <tituswormer@gmail.com>
+
+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:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+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.
diff --git a/package.json b/package.json
@@ -0,0 +1,81 @@
+{
+  "name": "hast-util-to-xast",
+  "version": "0.0.0",
+  "description": "hast utility to transform to xast",
+  "license": "MIT",
+  "keywords": [
+    "xast",
+    "hast",
+    "unist",
+    "dsl",
+    "xml",
+    "html"
+  ],
+  "repository": "syntax-tree/hast-util-to-xast",
+  "bugs": "https://github.com/syntax-tree/hast-util-to-xast/issues",
+  "funding": {
+    "type": "opencollective",
+    "url": "https://opencollective.com/unified"
+  },
+  "author": "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)",
+  "contributors": [
+    "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
+  ],
+  "files": [
+    "index.js"
+  ],
+  "dependencies": {
+    "comma-separated-tokens": "^1.0.0",
+    "property-information": "^5.0.0",
+    "space-separated-tokens": "^1.0.0",
+    "unist-util-position": "^3.0.0",
+    "web-namespaces": "^1.0.0",
+    "xtend": "^4.0.0",
+    "zwitch": "^1.0.0"
+  },
+  "devDependencies": {
+    "hastscript": "^5.0.0",
+    "nyc": "^15.0.0",
+    "prettier": "^1.0.0",
+    "remark-cli": "^7.0.0",
+    "remark-preset-wooorm": "^6.0.0",
+    "tape": "^4.0.0",
+    "unist-builder": "^2.0.0",
+    "xastscript": "^1.0.0",
+    "xo": "^0.25.0"
+  },
+  "scripts": {
+    "format": "remark . -qfo && prettier --write \"**/*.js\" && xo --fix",
+    "test-api": "node test",
+    "test-coverage": "nyc --reporter lcov tape test.js",
+    "test": "npm run format && npm run test-coverage"
+  },
+  "nyc": {
+    "check-coverage": true,
+    "lines": 100,
+    "functions": 100,
+    "branches": 100
+  },
+  "prettier": {
+    "tabWidth": 2,
+    "useTabs": false,
+    "singleQuote": true,
+    "bracketSpacing": false,
+    "semi": false,
+    "trailingComma": "none"
+  },
+  "xo": {
+    "prettier": true,
+    "esnext": false,
+    "rules": {
+      "unicorn/prefer-includes": "off",
+      "no-self-compare": "off",
+      "guard-for-in": "off"
+    }
+  },
+  "remarkConfig": {
+    "plugins": [
+      "preset-wooorm"
+    ]
+  }
+}