super- and subscript brackets (note that there are no Unicode codepoints assigned to these glyphs; they are purely for substitution with sups and subs features)

2 files changed, 641 insertions, 237 deletions

diff --git a/docs/lab/index.html b/docs/lab/index.html
index 948f33e0f..f989045c9 100644
--- a/docs/lab/index.html
+++ b/docs/lab/index.html
@@ -216,92 +216,64 @@ left side cascades up to 5 characters:
 `)
 
 
-samples.set('Feature: sups', `
-Dedicated glyphs, corresponding ASCII, codepoint
-\u2070 \t 0 \t U+2070
-\u00b9 \t 1 \t U+00B9
-\u00b2 \t 2 \t U+00B2
-\u00b3 \t 3 \t U+00B3
-\u2074 \t 4 \t U+2074
-\u2075 \t 5 \t U+2075
-\u2076 \t 6 \t U+2076
-\u2077 \t 7 \t U+2077
-\u2078 \t 8 \t U+2078
-\u2079 \t 9 \t U+2079
-\u207a \t + \t U+207A
-\u207b \t - \t U+207B
-\u207c \t = \t U+207C
-\u207d \t ( \t U+207D
-\u207e \t ) \t U+207E
-\u1d43 \t a \t U+1D43
-\u1d47 \t b \t U+1D47
-\u1d9c \t c \t U+1D9C
-\u1d48 \t d \t U+1D48
-\u1d49 \t e \t U+1D49
-\u1da0 \t f \t U+1DA0
-\u1d4d \t g \t U+1D4D
-\u02b0 \t h \t U+02B0
-\u1da6 \t i \t U+1DA6
-\u02b2 \t j \t U+02B2
-\u1d4f \t k \t U+1D4F
-\u02e1 \t l \t U+02E1
-\u1d50 \t m \t U+1D50
-\u207f \t n \t U+207F
-\u1d52 \t o \t U+1D52
-\u1d56 \t p \t U+1D56
-\u146b \t q \t U+146B
-\u02b3 \t r \t U+02B3
-\u02e2 \t s \t U+02E2
-\u1d57 \t t \t U+1D57
-\u1d58 \t u \t U+1D58
-\u1d5b \t v \t U+1D5B
-\u02b7 \t w \t U+02B7
-\u02e3 \t x \t U+02E3
-\u02b8 \t y \t U+02B8
-\u1dbb \t z \t U+1DBB
-
-(enable sups feature to turn column 2 == column 1)
+samples.set('Feature: sups & subs', `
+#!enableFeatures:tnum,sups
+Superscript and subscript tests
+
+m⁽ˣ⁾[ˣ][³]ᵗ⁺⁴x
+m(x)[x][3]t+4x
+
+Table of super- and subscript characters.
+Enable/disable sups and subs feature to explore substitutions.
+
+sups \t \t \t \t |   subs
+———————————————————————
+0 \t \u2070 \t U+2070 \t |   0 \t \u2080 \t U+2080
+1 \t \u00b9 \t U+00B9 \t |   1 \t \u2081 \t U+2081
+2 \t \u00b2 \t U+00B2 \t |   2 \t \u2082 \t U+2082
+3 \t \u00b3 \t U+00B3 \t |   3 \t \u2083 \t U+2083
+4 \t \u2074 \t U+2074 \t |   4 \t \u2084 \t U+2084
+5 \t \u2075 \t U+2075 \t |   5 \t \u2085 \t U+2085
+6 \t \u2076 \t U+2076 \t |   6 \t \u2086 \t U+2086
+7 \t \u2077 \t U+2077 \t |   7 \t \u2087 \t U+2087
+8 \t \u2078 \t U+2078 \t |   8 \t \u2088 \t U+2088
+9 \t \u2079 \t U+2079 \t |   9 \t \u2089 \t U+2089
++ \t \u207a \t U+207A \t |   + \t \u208A \t U+208A
+- \t \u207b \t U+207B \t |   - \t \u208B \t U+208B
+= \t \u207c \t U+207C \t |   = \t \u208C \t U+208C
+( \t \u207d \t U+207D \t |   ( \t \u208D \t U+208D
+) \t \u207e \t U+207E \t |   ) \t \u208E \t U+208E
+[ \t \u0020 \t        \t |   [ \t
+] \t \u0020 \t        \t |   ] \t
+a \t \u1d43 \t U+1D43 \t |   a \t \u2090 \t U+2090
+b \t \u1d47 \t U+1D47 \t |   b \t
+c \t \u1d9c \t U+1D9C \t |   c \t
+d \t \u1d48 \t U+1D48 \t |   d \t
+e \t \u1d49 \t U+1D49 \t |   e \t \u2091 \t U+2091
+f \t \u1da0 \t U+1DA0 \t |   f \t 
+g \t \u1d4d \t U+1D4D \t |   g \t 
+h \t \u02b0 \t U+02B0 \t |   h \t \u2095 \t U+2095
+i \t \u1da6 \t U+1DA6 \t |   i \t \u1D62 \t U+1D62
+j \t \u02b2 \t U+02B2 \t |   j \t \u2C7C \t U+2C7C
+k \t \u1d4f \t U+1D4F \t |   k \t \u2096 \t U+2096
+l \t \u02e1 \t U+02E1 \t |   l \t \u2097 \t U+2097
+m \t \u1d50 \t U+1D50 \t |   m \t \u2098 \t U+2098
+n \t \u207f \t U+207F \t |   n \t \u2099 \t U+2099
+o \t \u1d52 \t U+1D52 \t |   o \t \u2092 \t U+2092
+p \t \u1d56 \t U+1D56 \t |   p \t \u209A \t U+209A
+q \t \u146b \t U+146B \t |   q \t 
+r \t \u02b3 \t U+02B3 \t |   r \t \u1D63 \t U+1D63
+s \t \u02e2 \t U+02E2 \t |   s \t \u209B \t U+209B
+t \t \u1d57 \t U+1D57 \t |   t \t \u209C \t U+209C
+u \t \u1d58 \t U+1D58 \t |   u \t \u1D64 \t U+1D64
+v \t \u1d5b \t U+1D5B \t |   v \t \u1D65 \t U+1D65
+w \t \u02b7 \t U+02B7 \t |   w \t 
+x \t \u02e3 \t U+02E3 \t |   x \t \u2093 \t x \t U+2093
+y \t \u02b8 \t U+02B8 \t |   y \t 
+z \t \u1dbb \t U+1DBB \t |   z \t 
 `)
 
 
-samples.set('Feature: subs', `
-Dedicated glyphs, corresponding ASCII, codepoint
-\u2080 \t 0 \t U+2080
-\u2081 \t 1 \t U+2081
-\u2082 \t 2 \t U+2082
-\u2083 \t 3 \t U+2083
-\u2084 \t 4 \t U+2084
-\u2085 \t 5 \t U+2085
-\u2086 \t 6 \t U+2086
-\u2087 \t 7 \t U+2087
-\u2088 \t 8 \t U+2088
-\u2089 \t 9 \t U+2089
-\u208A \t + \t U+208A
-\u208B \t - \t U+208B
-\u208C \t = \t U+208C
-\u208D \t ( \t U+208D
-\u208E \t ) \t U+208E
-\u2090 \t a \t U+2090
-\u2091 \t e \t U+2091
-\u2095 \t h \t U+2095
-\u1D62 \t i \t U+1D62
-\u2C7C \t j \t U+2C7C
-\u2096 \t k \t U+2096
-\u2097 \t l \t U+2097
-\u2098 \t m \t U+2098
-\u2099 \t n \t U+2099
-\u2092 \t o \t U+2092
-\u209A \t p \t U+209A
-\u1D63 \t r \t U+1D63
-\u209B \t s \t U+209B
-\u209C \t t \t U+209C
-\u1D64 \t u \t U+1D64
-\u1D65 \t v \t U+1D65
-\u2093 \t x \t U+2093
-
-(enable subs feature to turn column 2 == column 1)
-`)
-
 
 // From http://justanotherfoundry.com/generator
 samples.set('Kerning body en',
@@ -1886,59 +1858,6 @@ function main() {
     })
   }
 
-  // sample text
-  const samplesSelect = document.querySelector('select[name="sample"]')
-  for (let [k,v] of samples) {
-    const opt = document.createElement('option')
-    opt.innerText = k
-    if (v) {
-      opt.value = k
-    } else {
-      opt.disabled = true
-    }
-    samplesSelect.appendChild(opt)
-  }
-  sampleVar = vars.bind('sample', samplesSelect, (e, v) => {
-    let sampleText = samples.get(v) || ''+v
-
-    if (v == 'Repertoire') {
-      repertoireControl.style.display = null
-    } else {
-      repertoireControl.style.display = 'none'
-    }
-
-    if (typeof sampleText == 'object' && sampleText.toHTML) {
-      const html = sampleText.toHTML()
-      interUISample.innerHTML   = html
-      secondarySample.innerHTML = html
-    } else {
-      sampleText = String(sampleText).replace(/^[\s\r\n\r]+|[\s\r\n\r]+$/g, '')
-      if (sampleText) {
-        interUISample.innerText   = sampleText
-        secondarySample.innerText = sampleText
-      }
-    }
-
-    if (v == 'Repertoire') {
-      requestAnimationFrame(() => {
-        if (sizeVar) {
-          sizeVar.refreshValue(null)
-        }
-      })
-    }
-  })
-
-  vars.bind('repertoireOrder', (e, v) => {
-    let currOrder = repertoireOrder
-    if (v == 'u') {
-      repertoireOrder = RepertoireOrderUnicode
-    } else {
-      repertoireOrder = RepertoireOrderGlyphList
-    }
-    if (sampleVar && currOrder != repertoireOrder) {
-      sampleVar.refreshValue(null)
-    }
-  })
 
   const lineHeightInput = document.querySelector('[name="lineHeight"]')
   let measurePending = false
@@ -1982,6 +1901,67 @@ function main() {
     setCSSProp('-ms-' + name, value)
   }
 
+
+  let feats = new Map()
+  let featVars = new Map()
+  let updateFeaturesStyleTimer = null
+
+  function updateFeaturesStyle() {
+    let css = Array.from(feats).map(f => `"${f[0]}" ${f[1]}`).join(', ')
+    setCSSProp('font-feature-settings', css)
+  }
+
+  function scheduleUpdateFeaturesStyle() {
+    if (updateFeaturesStyleTimer === null) {
+      updateFeaturesStyleTimer = setTimeout(() => {
+        updateFeaturesStyleTimer = null
+        updateFeaturesStyle()
+      }, 1)
+    }
+  }
+
+  function setFeature(feat, val, dontUpdateVar/*=false*/) {
+    if (typeof val == 'boolean') {
+      val = val ? 1 : 0
+    }
+    let prevVal = feats.get(feat)
+    if (prevVal !== val) {
+      feats.set(feat, val)
+      scheduleUpdateFeaturesStyle()
+      if (!dontUpdateVar) {
+        let vr = featVars.get(feat)
+        if (vr) {
+          vr.setValue(val)
+        }
+      }
+    }
+  }
+
+  // sample text
+  const samplesSelect = document.querySelector('select[name="sample"]')
+  for (let [k,v] of samples) {
+    const opt = document.createElement('option')
+    opt.innerText = k
+    if (v) {
+      opt.value = k
+    } else {
+      opt.disabled = true
+    }
+    samplesSelect.appendChild(opt)
+  }
+
+  vars.bind('repertoireOrder', (e, v) => {
+    let currOrder = repertoireOrder
+    if (v == 'u') {
+      repertoireOrder = RepertoireOrderUnicode
+    } else {
+      repertoireOrder = RepertoireOrderGlyphList
+    }
+    if (sampleVar && currOrder != repertoireOrder) {
+      sampleVar.refreshValue(null)
+    }
+  })
+
   const boxes = document.querySelector('boxes')
   sizeVar = vars.bind('size', (e, v) => {
     boxes.style.display = (v > 20) ? 'none' : null
@@ -2213,73 +2193,70 @@ function main() {
   //   setCSSProp('font-variant-numeric', e.value = v)
   // })
 
-  let features = new Set()
-  for (let e of Array.prototype.slice.call(document.querySelectorAll('input.featopt'))) {
+
+  for (let e of Array.from(document.querySelectorAll('input.featopt'))) {
     let p = e.name.replace(/^feat\:/, '').split('=')
-    let name = p[0], value = p[1] || '1'
-    vars.bind('feat-' + name, e, (e, on) => {
-      let val = '"' + name + '" ' + value
-      if (on) {
-        features.add(val)
-      } else {
-        features.delete(val)
-      }
-      setCSSProp('font-feature-settings', Array.from(features).join(', '))
+    let name = p[0]
+    let valueOn = parseInt(p[1] || '1')
+    let valueOff = valueOn == 0 ? 1 : 0
+    let vr = vars.bind('feat-' + name, e, (e, on) => {
+      setFeature(name, on ? valueOn : valueOff, /*dontUpdateVar=*/true)
     })
+    featVars.set(name, vr)
   }
 
-  function initCanvas(canvas) {
-    const w = parseInt(canvas.width)
-    const h = parseInt(canvas.height)
-    const scale = window.devicePixelRatio || 1
-    if (scale != 1) {
-      canvas.width  = w * scale
-      canvas.height = h * scale
-      canvas.style.width  = w + 'px'
-      canvas.style.height = h + 'px'
-    }
-  }
+  updateFeaturesStyle()
 
-  initCanvas(renderCanvas)
-  initCanvas(displayCanvas)
-
-  function rasterize(text) {
-    const ctx = renderCanvas.getContext('2d')
-    const width = parseInt(renderCanvas.width)
-    const height = parseInt(renderCanvas.height)
-
-    ctx.clearRect(0, 0, width, height)
-
-    ctx.font = '22px/36px ' + fontFamilyName
-    ctx.fillText(text, 4, 24)
-
-    ctx.font = '11px/18px ' + fontFamilyName
-    ctx.fillText(text, 4, 44)
-    
-    const zctx = displayCanvas.getContext('2d')
-    zctx.webkitImageSmoothingEnabled = false;
-    zctx.mozImageSmoothingEnabled = false;
-    zctx.imageSmoothingEnabled = false;
-    const zwidth = parseInt(displayCanvas.width)
-    const zheight = parseInt(displayCanvas.height)
-    zctx.clearRect(0, 0, zwidth, zheight)
-    zctx.drawImage(
-      renderCanvas,
-      0, 0, width, height,
-      0, 0, zwidth, zheight
-    )
-  }
+  sampleVar = vars.bind('sample', samplesSelect, (e, v) => {
+    let sampleText = samples.get(v) || ''+v
+
+    if (v == 'Repertoire') {
+      repertoireControl.style.display = null
+    } else {
+      repertoireControl.style.display = 'none'
+    }
 
-  let didSetInitialValue = false
+    if (typeof sampleText == 'object' && sampleText.toHTML) {
+      const html = sampleText.toHTML()
+      interUISample.innerHTML   = html
+      secondarySample.innerHTML = html
+    } else {
+      // look for directive
+      // #!directive:value
+      sampleText = String(sampleText).replace(/^[\s\r\n\r]+|[\s\r\n\r]+$/g, '')
+      let m = /(?:^|\n)#\!([\w_\-]+):(.+)(?:\n|$)/.exec(sampleText)
+      if (m) {
+        // parse directive
+        sampleText = (
+          sampleText.substring(0, m.index) +
+          sampleText.substr(m.index + m[0].length)
+        )
+        let directive = m[1].toLowerCase()
+        console.log('dir', m[1], '=>', m[2])
+        if (directive == 'enablefeatures') {
+          // #!enableFeatures:tnum,dlig
+          for (let feat of m[2].toLowerCase().split(/\s*,\s*/)) {
+            setFeature(feat, 1)
+          }
+        } else {
+          console.warn(`ignoring unknown directive ${m[0]} in sample text`)
+        }
+      }
+      if (sampleText) {
+        interUISample.innerText   = sampleText
+        secondarySample.innerText = sampleText
+      }
+    }
 
-  let rasterizePhraseVar = vars.bind('rasterizePhrase', (e, v) => {
-    if (document.readyState == 'complete') {
-      rasterize(v)
+    if (v == 'Repertoire') {
+      requestAnimationFrame(() => {
+        if (sizeVar) {
+          sizeVar.refreshValue(null)
+        }
+      })
     }
   })
 
-  document.onreadystatechange = () => vars.refreshValue('rasterizePhrase')
-
 }
     </script>
   </body>
diff --git a/src/Inter.glyphs b/src/Inter.glyphs
index 70902cffa..80f7b01e7 100644
--- a/src/Inter.glyphs
+++ b/src/Inter.glyphs
@@ -1,8 +1,10 @@
 {
 .appVersion = "1208";
 DisplayStrings = (
-"/crossbar bdH/dcroat",
-"/dong/dcroat"
+"m/parenleft.sups/x.sups/parenright.sups/bracketleft.sups/x.sups/bracketright.sups/bracketleft.sups ³/bracketright.sups/t.sups/plus.sups/four.sups x/parenleft.subs/x.subs/parenright.subs/bracketleft.subs/x.subs/bracketright.subs",
+"/parenleft.subs/x.subs/parenright.subs/bracketleft.subs/x.subs/bracketright.subs",
+"/bracketleft.subs/bracketright.subs",
+"/t.sups/four.sups/plus.sups"
 );
 classes = (
 {
@@ -1483,6 +1485,8 @@ eight.sups,
 nine.sups,
 parenleft.sups,
 parenright.sups,
+bracketleft.sups,
+bracketright.sups,
 plus.sups,
 minus.sups,
 equal.sups,
@@ -1524,6 +1528,8 @@ eight.subs,
 nine.subs,
 parenleft.subs,
 parenright.subs,
+bracketleft.subs,
+bracketright.subs,
 plus.subs,
 minus.subs,
 equal.subs,
@@ -2583,11 +2589,11 @@ code = "sub exclam question by interrobang;\012sub question exclam by interroban
 name = dlig;
 },
 {
-code = "sub a by a.sups;\012sub b by b.sups;\012sub c by c.sups;\012sub d by d.sups;\012sub e by e.sups;\012sub f by f.sups;\012sub g by g.sups;\012sub h by h.sups;\012sub i by i.sups;\012sub j by j.sups;\012sub k by k.sups;\012sub l by l.sups;\012sub m by m.sups;\012sub n by n.sups;\012sub o by o.sups;\012sub p by p.sups;\012sub q by q.sups;\012sub r by r.sups;\012sub s by s.sups;\012sub t by t.sups;\012sub u by u.sups;\012sub v by v.sups;\012sub w by w.sups;\012sub x by x.sups;\012sub y by y.sups;\012sub z by z.sups;\012sub [zero zero.slash] by zero.sups;\012sub [one one.ss01] by one.sups;\012sub two by two.sups;\012sub three by three.sups;\012sub [four four.ss01] by four.sups;\012sub five by five.sups;\012sub [six six.ss01] by six.sups;\012sub seven by seven.sups;\012sub eight by eight.sups;\012sub [nine nine.ss01] by nine.sups;\012sub [parenleft parenleft.case] by parenleft.sups;\012sub [parenright parenright.case] by parenright.sups;\012sub [plus plus.case] by plus.sups;\012sub [minus minus.case hyphen hyphen.case] by minus.sups;\012sub [equal equal.case] by equal.sups;";
+code = "sub a by a.sups;\012sub b by b.sups;\012sub c by c.sups;\012sub d by d.sups;\012sub e by e.sups;\012sub f by f.sups;\012sub g by g.sups;\012sub h by h.sups;\012sub i by i.sups;\012sub j by j.sups;\012sub k by k.sups;\012sub [l l.ss02] by l.sups;\012sub m by m.sups;\012sub n by n.sups;\012sub o by o.sups;\012sub p by p.sups;\012sub q by q.sups;\012sub [r r.1] by r.sups;\012sub s by s.sups;\012sub t by t.sups;\012sub u by u.sups;\012sub v by v.sups;\012sub w by w.sups;\012sub x by x.sups;\012sub y by y.sups;\012sub z by z.sups;\012sub [zero zero.slash zero.tf zero.tf.slash] by zero.sups;\012sub [one one.ss01 one.tf one.tf.ss01] by one.sups;\012sub [two two.tf] by two.sups;\012sub [three three.1 three.tf three.1.tf] by three.sups;\012sub [four four.ss01 four.tf four.tf.ss01] by four.sups;\012sub [five five.tf] by five.sups;\012sub [six six.ss01 six.tf six.tf.ss01] by six.sups;\012sub [seven seven.tf] by seven.sups;\012sub [eight eight.tf] by eight.sups;\012sub [nine nine.ss01 nine.tf nine.tf.ss01] by nine.sups;\012sub [parenleft parenleft.case] by parenleft.sups;\012sub [parenright parenright.case] by parenright.sups;\012sub [bracketleft bracketleft.case] by bracketleft.sups;\012sub [bracketright bracketright.case] by bracketright.sups;\012sub [plus plus.case] by plus.sups;\012sub [minus minus.case hyphen hyphen.case] by minus.sups;\012sub [equal equal.case] by equal.sups;\012";
 name = sups;
 },
 {
-code = "sub a by a.subs;\012sub b by b.subs;\012sub c by c.subs;\012sub d by d.subs;\012sub e by e.subs;\012sub f by f.subs;\012sub g by g.subs;\012sub h by h.subs;\012sub i by i.subs;\012sub j by j.subs;\012sub k by k.subs;\012sub l by l.subs;\012sub m by m.subs;\012sub n by n.subs;\012sub o by o.subs;\012sub p by p.subs;\012sub q by q.subs;\012sub r by r.subs;\012sub s by s.subs;\012sub t by t.subs;\012sub u by u.subs;\012sub v by v.subs;\012sub w by w.subs;\012sub x by x.subs;\012sub y by y.subs;\012sub z by z.subs;\012sub [zero zero.slash] by zero.subs;\012sub [one one.ss01] by one.subs;\012sub two by two.subs;\012sub three by three.subs;\012sub [four four.ss01] by four.subs;\012sub five by five.subs;\012sub [six six.ss01] by six.subs;\012sub seven by seven.subs;\012sub eight by eight.subs;\012sub [nine nine.ss01] by nine.subs;\012sub [parenleft parenleft.case] by parenleft.subs;\012sub [parenright parenright.case] by parenright.subs;\012sub [plus plus.case] by plus.subs;\012sub [minus minus.case hyphen hyphen.case] by minus.subs;\012sub [equal equal.case] by equal.subs;";
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