Docs

1 files changed, 302 insertions, 0 deletions

diff --git a/node_modules/autoprefixer/lib/supports.js b/node_modules/autoprefixer/lib/supports.js
new file mode 100644
index 0000000..58bd5af
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+++ b/node_modules/autoprefixer/lib/supports.js
@@ -0,0 +1,302 @@
+let featureQueries = require('caniuse-lite/data/features/css-featurequeries.js')
+let feature = require('caniuse-lite/dist/unpacker/feature')
+let { parse } = require('postcss')
+
+let Browsers = require('./browsers')
+let brackets = require('./brackets')
+let Value = require('./value')
+let utils = require('./utils')
+
+let data = feature(featureQueries)
+
+let supported = []
+for (let browser in data.stats) {
+  let versions = data.stats[browser]
+  for (let version in versions) {
+    let support = versions[version]
+    if (/y/.test(support)) {
+      supported.push(browser + ' ' + version)
+    }
+  }
+}
+
+class Supports {
+  constructor(Prefixes, all) {
+    this.Prefixes = Prefixes
+    this.all = all
+  }
+
+  /**
+   * Add prefixes
+   */
+  add(nodes, all) {
+    return nodes.map(i => {
+      if (this.isProp(i)) {
+        let prefixed = this.prefixed(i[0])
+        if (prefixed.length > 1) {
+          return this.convert(prefixed)
+        }
+
+        return i
+      }
+
+      if (typeof i === 'object') {
+        return this.add(i, all)
+      }
+
+      return i
+    })
+  }
+
+  /**
+   * Clean brackets with one child
+   */
+  cleanBrackets(nodes) {
+    return nodes.map(i => {
+      if (typeof i !== 'object') {
+        return i
+      }
+
+      if (i.length === 1 && typeof i[0] === 'object') {
+        return this.cleanBrackets(i[0])
+      }
+
+      return this.cleanBrackets(i)
+    })
+  }
+
+  /**
+   * Add " or " between properties and convert it to brackets format
+   */
+  convert(progress) {
+    let result = ['']
+    for (let i of progress) {
+      result.push([`${i.prop}: ${i.value}`])
+      result.push(' or ')
+    }
+    result[result.length - 1] = ''
+    return result
+  }
+
+  /**
+   * Check global options
+   */
+  disabled(node) {
+    if (!this.all.options.grid) {
+      if (node.prop === 'display' && node.value.includes('grid')) {
+        return true
+      }
+      if (node.prop.includes('grid') || node.prop === 'justify-items') {
+        return true
+      }
+    }
+
+    if (this.all.options.flexbox === false) {
+      if (node.prop === 'display' && node.value.includes('flex')) {
+        return true
+      }
+      let other = ['order', 'justify-content', 'align-items', 'align-content']
+      if (node.prop.includes('flex') || other.includes(node.prop)) {
+        return true
+      }
+    }
+
+    return false
+  }
+
+  /**
+   * Return true if prefixed property has no unprefixed
+   */
+  isHack(all, unprefixed) {
+    let check = new RegExp(`(\\(|\\s)${utils.escapeRegexp(unprefixed)}:`)
+    return !check.test(all)
+  }
+
+  /**
+   * Return true if brackets node is "not" word
+   */
+  isNot(node) {
+    return typeof node === 'string' && /not\s*/i.test(node)
+  }
+
+  /**
+   * Return true if brackets node is "or" word
+   */
+  isOr(node) {
+    return typeof node === 'string' && /\s*or\s*/i.test(node)
+  }
+
+  /**
+   * Return true if brackets node is (prop: value)
+   */
+  isProp(node) {
+    return (
+      typeof node === 'object' &&
+      node.length === 1 &&
+      typeof node[0] === 'string'
+    )
+  }
+
+  /**
+   * Compress value functions into a string nodes
+   */
+  normalize(nodes) {
+    if (typeof nodes !== 'object') {
+      return nodes
+    }
+
+    nodes = nodes.filter(i => i !== '')
+
+    if (typeof nodes[0] === 'string') {
+      let firstNode = nodes[0].trim()
+
+      if (
+        firstNode.includes(':') ||
+        firstNode === 'selector' ||
+        firstNode === 'not selector'
+      ) {
+        return [brackets.stringify(nodes)]
+      }
+    }
+    return nodes.map(i => this.normalize(i))
+  }
+
+  /**
+   * Parse string into declaration property and value
+   */
+  parse(str) {
+    let parts = str.split(':')
+    let prop = parts[0]
+    let value = parts[1]
+    if (!value) value = ''
+    return [prop.trim(), value.trim()]
+  }
+
+  /**
+   * Return array of Declaration with all necessary prefixes
+   */
+  prefixed(str) {
+    let rule = this.virtual(str)
+    if (this.disabled(rule.first)) {
+      return rule.nodes
+    }
+
+    let result = { warn: () => null }
+
+    let prefixer = this.prefixer().add[rule.first.prop]
+    prefixer && prefixer.process && prefixer.process(rule.first, result)
+
+    for (let decl of rule.nodes) {
+      for (let value of this.prefixer().values('add', rule.first.prop)) {
+        value.process(decl)
+      }
+      Value.save(this.all, decl)
+    }
+
+    return rule.nodes
+  }
+
+  /**
+   * Return prefixer only with @supports supported browsers
+   */
+  prefixer() {
+    if (this.prefixerCache) {
+      return this.prefixerCache
+    }
+
+    let filtered = this.all.browsers.selected.filter(i => {
+      return supported.includes(i)
+    })
+
+    let browsers = new Browsers(
+      this.all.browsers.data,
+      filtered,
+      this.all.options
+    )
+    this.prefixerCache = new this.Prefixes(
+      this.all.data,
+      browsers,
+      this.all.options
+    )
+    return this.prefixerCache
+  }
+
+  /**
+   * Add prefixed declaration
+   */
+  process(rule) {
+    let ast = brackets.parse(rule.params)
+    ast = this.normalize(ast)
+    ast = this.remove(ast, rule.params)
+    ast = this.add(ast, rule.params)
+    ast = this.cleanBrackets(ast)
+    rule.params = brackets.stringify(ast)
+  }
+
+  /**
+   * Remove all unnecessary prefixes
+   */
+  remove(nodes, all) {
+    let i = 0
+    while (i < nodes.length) {
+      if (
+        !this.isNot(nodes[i - 1]) &&
+        this.isProp(nodes[i]) &&
+        this.isOr(nodes[i + 1])
+      ) {
+        if (this.toRemove(nodes[i][0], all)) {
+          nodes.splice(i, 2)
+          continue
+        }
+
+        i += 2
+        continue
+      }
+
+      if (typeof nodes[i] === 'object') {
+        nodes[i] = this.remove(nodes[i], all)
+      }
+
+      i += 1
+    }
+    return nodes
+  }
+
+  /**
+   * Return true if we need to remove node
+   */
+  toRemove(str, all) {
+    let [prop, value] = this.parse(str)
+    let unprefixed = this.all.unprefixed(prop)
+
+    let cleaner = this.all.cleaner()
+
+    if (
+      cleaner.remove[prop] &&
+      cleaner.remove[prop].remove &&
+      !this.isHack(all, unprefixed)
+    ) {
+      return true
+    }
+
+    for (let checker of cleaner.values('remove', unprefixed)) {
+      if (checker.check(value)) {
+        return true
+      }
+    }
+
+    return false
+  }
+
+  /**
+   * Create virtual rule to process it by prefixer
+   */
+  virtual(str) {
+    let [prop, value] = this.parse(str)
+    let rule = parse('a{}').first
+    rule.append({ prop, raws: { before: '' }, value })
+    return rule
+  }
+}
+
+module.exports = Supports