Initial commit

2021-10-23 19:59:20 +10:00
commit ba4c9a7d7a
1851 changed files with 1250444 additions and 0 deletions
--- a/node_modules/canvas/lib/parse-font.js
+++ b/node_modules/canvas/lib/parse-font.js
@@ -0,0 +1,102 @@
+'use strict'
+
+/**
+ * Font RegExp helpers.
+ */
+
+const weights = 'bold|bolder|lighter|[1-9]00'
+  , styles = 'italic|oblique'
+  , variants = 'small-caps'
+  , stretches = 'ultra-condensed|extra-condensed|condensed|semi-condensed|semi-expanded|expanded|extra-expanded|ultra-expanded'
+  , units = 'px|pt|pc|in|cm|mm|%|em|ex|ch|rem|q'
+  , string = '\'([^\']+)\'|"([^"]+)"|[\\w\\s-]+'
+
+// [ [ <‘font-style’> || <font-variant-css21> || <‘font-weight’> || <‘font-stretch’> ]?
+//    <‘font-size’> [ / <‘line-height’> ]? <‘font-family’> ]
+// https://drafts.csswg.org/css-fonts-3/#font-prop
+const weightRe = new RegExp('(' + weights + ') +', 'i')
+const styleRe = new RegExp('(' + styles + ') +', 'i')
+const variantRe = new RegExp('(' + variants + ') +', 'i')
+const stretchRe = new RegExp('(' + stretches + ') +', 'i')
+const sizeFamilyRe = new RegExp(
+  '([\\d\\.]+)(' + units + ') *'
+  + '((?:' + string + ')( *, *(?:' + string + '))*)')
+
+/**
+ * Cache font parsing.
+ */
+
+const cache = {}
+
+const defaultHeight = 16 // pt, common browser default
+
+/**
+ * Parse font `str`.
+ *
+ * @param {String} str
+ * @return {Object} Parsed font. `size` is in device units. `unit` is the unit
+ *   appearing in the input string.
+ * @api private
+ */
+
+module.exports = function (str) {
+  // Cached
+  if (cache[str]) return cache[str]
+
+  // Try for required properties first.
+  const sizeFamily = sizeFamilyRe.exec(str)
+  if (!sizeFamily) return // invalid
+
+  // Default values and required properties
+  const font = {
+    weight: 'normal',
+    style: 'normal',
+    stretch: 'normal',
+    variant: 'normal',
+    size: parseFloat(sizeFamily[1]),
+    unit: sizeFamily[2],
+    family: sizeFamily[3].replace(/["']/g, '').replace(/ *, */g, ',')
+  }
+
+  // Optional, unordered properties.
+  let weight, style, variant, stretch
+  // Stop search at `sizeFamily.index`
+  let substr = str.substring(0, sizeFamily.index)
+  if ((weight = weightRe.exec(substr))) font.weight = weight[1]
+  if ((style = styleRe.exec(substr))) font.style = style[1]
+  if ((variant = variantRe.exec(substr))) font.variant = variant[1]
+  if ((stretch = stretchRe.exec(substr))) font.stretch = stretch[1]
+
+  // Convert to device units. (`font.unit` is the original unit)
+  // TODO: ch, ex
+  switch (font.unit) {
+    case 'pt':
+      font.size /= 0.75
+      break
+    case 'pc':
+      font.size *= 16
+      break
+    case 'in':
+      font.size *= 96
+      break
+    case 'cm':
+      font.size *= 96.0 / 2.54
+      break
+    case 'mm':
+      font.size *= 96.0 / 25.4
+      break
+    case '%':
+      // TODO disabled because existing unit tests assume 100
+      // font.size *= defaultHeight / 100 / 0.75
+      break
+    case 'em':
+    case 'rem':
+      font.size *= defaultHeight / 0.75
+      break
+    case 'q':
+      font.size *= 96 / 25.4 / 4
+      break
+  }
+
+  return (cache[str] = font)
+}