実行可能サンプル(RUN)を Web Worker 化して停止・タイムアウトに対応

lib/bitclust/subcommands/statichtml_command.rb

@@ -327,18 +327,26 @@ def create_search_index(outputdir, db, fdb)
                      :verbose => @verbose, :preserve => true)
       end
 
-      # Copy the RUN-button script (statichtml --run-ruby-wasm). A themedir
-      # without js/run.js is tolerated: warn and skip instead of aborting the
-      # whole build.
+      # Scripts for the RUN-button feature (statichtml --run-ruby-wasm):
+      # run.js sets up the button and compiles the wasm module on the main
+      # thread; run-worker.js is the module Worker it spawns per execution
+      # (see theme/default/js/run.js for why: STOP/timeout both just
+      # Worker#terminate() it). Both are required for the feature to work.
+      RUN_RUBY_WASM_JS_FILES = %w[run.js run-worker.js].freeze
+
+      # Copy the RUN-button scripts. A themedir missing one of them is
+      # tolerated: warn and skip instead of aborting the whole build.
       def copy_run_ruby_wasm_script
-        run_js = @manager_config[:themedir] + "js" + "run.js"
-        unless run_js.file?
-          $stderr.puts "warning: #{run_js} not found; RUN button script not copied"
-          return
-        end
         jsdir = @outputdir + "js"
-        FileUtils.mkdir_p(jsdir) unless jsdir.directory?
-        FileUtils.cp(run_js.to_s, jsdir.to_s, :verbose => @verbose, :preserve => true)
+        RUN_RUBY_WASM_JS_FILES.each do |name|
+          src = @manager_config[:themedir] + "js" + name
+          unless src.file?
+            $stderr.puts "warning: #{src} not found; RUN button script not copied"
+            next
+          end
+          FileUtils.mkdir_p(jsdir) unless jsdir.directory?
+          FileUtils.cp(src.to_s, jsdir.to_s, :verbose => @verbose, :preserve => true)
+        end
       end
 
       def create_html_file(entry, manager, outputdir, db)

sig/bitclust/subcommands/statichtml_command.rbs

@@ -121,6 +121,8 @@ module BitClust
 
       def create_index_html: (Pathname outputdir) -> void
 
+      RUN_RUBY_WASM_JS_FILES: Array[String]
+
       def copy_run_ruby_wasm_script: () -> void
 
       SEARCH_JS_FILES: Array[String]

test/js/test_run.mjs

@@ -1,8 +1,16 @@
-// QuickJS-based tests for the pure logic in theme/default/js/run.js.
+// QuickJS-based tests for the pure logic in theme/default/js/run.js and
+// theme/default/js/run-worker.js.
 // Run with: qjs test/js/test_run.mjs   (see the "test:js" rake task)
-// Importing the module doubles as a syntax/eval smoke test: its DOM setup is
-// guarded by `typeof window !== 'undefined'`.
-import { createOnceLoader, PRELUDE, formatRunError, truncateOutput } from '../../theme/default/js/run.js'
+// Importing each module doubles as a syntax/eval smoke test: run.js's DOM
+// setup is guarded by `typeof window !== 'undefined'`, and run-worker.js's
+// Worker setup is guarded by `typeof self !== 'undefined' && typeof
+// WorkerGlobalScope !== 'undefined'` -- neither exists under QuickJS, so
+// importing either file here never touches a real DOM/Worker.
+import {
+  createOnceLoader, formatRunError, truncateOutput,
+  accumulateOutput, STOPPED_NOTE, DONE_NOTE, timeoutNote, editableText,
+} from '../../theme/default/js/run.js'
+import { PRELUDE, formatRunError as formatWorkerRunError } from '../../theme/default/js/run-worker.js'
 
 let failures = 0
 function assert(cond, message) {
@@ -52,11 +60,20 @@ function assert(cond, message) {
          'next call after a rejection retries the load')
 }
 
-// PRELUDE captures both streams into one StringIO
-assert(PRELUDE.includes('require "stringio"') &&
-       PRELUDE.includes('$stdout = StringIO.new') &&
+// PRELUDE (run-worker.js) streams both channels to the main thread via the
+// JS bridge, instead of buffering into a StringIO like the old single-eval
+// PRELUDE did.
+assert(PRELUDE.includes('require "js"') &&
+       PRELUDE.includes('JS.global.call(:postOutput, text)') &&
+       PRELUDE.includes('$stdout = JSStreamIO.new') &&
        PRELUDE.includes('$stderr = $stdout'),
-       'PRELUDE redirects $stdout and $stderr into one StringIO')
+       'PRELUDE redirects $stdout and $stderr through postOutput()')
+
+// run-worker.js's formatRunError is the same shape as run.js's copy (each
+// runs in its own realm -- main thread vs. worker -- so it is a small
+// intentional duplication rather than an import cycle across the two files)
+assert(formatWorkerRunError(new Error('boom')) === 'boom',
+       'run-worker.js formatRunError matches run.js formatRunError')
 
 // formatRunError
 assert(formatRunError(new Error('boom')) === 'boom',
@@ -78,6 +95,43 @@ assert(truncateOutput('short') === 'short', 'truncateOutput keeps short output')
          'truncateOutput cuts long output with a marker')
 }
 
+// accumulateOutput: incremental version of truncateOutput, used to append
+// each Worker 'output' message to what is already on screen.
+assert(accumulateOutput('foo', 'bar') === 'foobar',
+       'accumulateOutput appends a chunk to the existing text')
+assert(accumulateOutput('', 'first') === 'first',
+       'accumulateOutput handles an empty starting value')
+{
+  const grown = accumulateOutput('x'.repeat(8), 'y'.repeat(8), 10)
+  assert(grown === 'x'.repeat(8) + 'y'.repeat(2) + '\n... (truncated)',
+         'accumulateOutput truncates once the cap is crossed mid-chunk')
+}
+{
+  // A chunk arriving after the cap was already hit must be a no-op, not a
+  // second "... (truncated)" marker or renewed growth.
+  const alreadyTruncated = truncateOutput('x'.repeat(20), 10)
+  const next = accumulateOutput(alreadyTruncated, 'more output', 10)
+  assert(next === alreadyTruncated,
+         'accumulateOutput drops further chunks once truncated')
+}
+
+// STOPPED_NOTE / DONE_NOTE / timeoutNote: the notes appended to the output
+// on STOP / normal completion / timeout
+assert(STOPPED_NOTE === '(停止しました)', 'STOPPED_NOTE is the stop notice')
+assert(DONE_NOTE === '(正常終了しました)',
+       'DONE_NOTE marks a normal completion (visible even with empty output)')
+assert(timeoutNote(30) === '(30秒でタイムアウトしました)',
+       'timeoutNote formats the configured timeout in seconds')
+
+// editableText: flattening for edit drops the compiler's leading newline
+// (the artifact after <code>) but keeps interior/trailing newlines intact
+assert(editableText('\np 1\np 2\n') === 'p 1\np 2\n',
+       'editableText strips the leading newline artifact')
+assert(editableText('\n\n\np 1\n') === 'p 1\n',
+       'editableText strips all leading blank lines')
+assert(editableText('p 1\n\np 2\n') === 'p 1\n\np 2\n',
+       'editableText keeps interior and trailing newlines')
+
 if (failures > 0) {
   throw new Error(failures + ' JS test(s) failed')
 }

test/js/test_script.mjs

@@ -37,24 +37,38 @@ class FakeElement {
     if (name === 'class') this.className = value
   }
   select() {}
+  // 実 DOM 同様、挿入時は元の親から外して付け替える(parentNode も追跡)
   appendChild(child) {
+    if (child.parentNode) child.parentNode.removeChild(child)
+    child.parentNode = this
     this.children.push(child)
     return child
   }
   insertBefore(child, ref) {
+    if (child.parentNode) child.parentNode.removeChild(child)
+    child.parentNode = this
     const i = this.children.indexOf(ref)
     if (ref == null || i < 0) this.children.push(child)
     else this.children.splice(i, 0, child)
     return child
   }
   removeChild(child) {
     const i = this.children.indexOf(child)
-    if (i >= 0) this.children.splice(i, 1)
+    if (i >= 0) {
+      this.children.splice(i, 1)
+      child.parentNode = null
+    }
     return child
   }
   get firstChild() {
     return this.children.length > 0 ? this.children[0] : null
   }
+  get previousElementSibling() {
+    if (!this.parentNode) return null
+    const siblings = this.parentNode.children
+    const i = siblings.indexOf(this)
+    return i > 0 ? siblings[i - 1] : null
+  }
   get textContent() {
     return this.ownText + this.children.map(c => c.textContent).join('')
   }
@@ -108,13 +122,17 @@ function makeDocument(elements) {
 const here = import.meta.url.replace(/^file:\/\//, '').replace(/\/[^/]*$/, '')
 const source = std.loadFile(here + '/../../theme/default/script.js')
 
+// script.js は pre の直前(親の子リスト)にツールバーを差し込むので、
+// テスト対象の要素は root(body 相当)にぶら下げて親を持たせる
 function runOnload(elements, navigatorFake) {
+  const root = new FakeElement('div')
+  elements.forEach((e) => root.appendChild(e))
   globalThis.document = makeDocument(elements)
   globalThis.window = { setTimeout() { return 0 } }
   globalThis.navigator = navigatorFake || {}
   ;(0, eval)(source)
   globalThis.window.onload()
-  return elements
+  return root
 }
 
 // Clipboard API を捕捉する navigator フェイク
@@ -139,15 +157,35 @@ async function settle() {
   await 0
 }
 
+// pre の直前のツールバー行 → ボタン置き場 → COPY を辿るヘルパー
+function toolbarOf(elem) {
+  const prev = elem.previousElementSibling
+  if (prev && prev.className.split(' ').indexOf('highlight__toolbar') >= 0) return prev
+  return null
+}
+function buttonGroupOf(elem) {
+  const toolbar = toolbarOf(elem)
+  return toolbar && toolbar.childByClass('highlight__button-group')
+}
+function copyButtonOf(elem) {
+  const group = buttonGroupOf(elem)
+  return group && group.childByClass('highlight__copy-button')
+}
+
 // A ruby sample keeps getting the COPY button (regression)
 {
   const spy = clipboardSpy()
   const pre = new FakeElement('pre', 'highlight ruby')
   pre.appendChild(new FakeElement('code', '', 'puts 1\n'))
   runOnload([pre], spy.navigator)
-  const btn = pre.childByClass('highlight__copy-button')
+  const btn = copyButtonOf(pre)
   assert(btn !== null, 'pre.highlight.ruby gets a COPY button')
-  assert(pre.firstChild === btn, 'COPY button is prepended as the first child')
+  assert(toolbarOf(pre) !== null,
+         'a toolbar row is inserted just before the pre (outside of it)')
+  assert(pre.childByClass('highlight__button-group') === null,
+         'no button container is injected inside the pre itself')
+  assert(buttonGroupOf(pre).firstChild === btn,
+         'COPY button lives inside the toolbar button group')
   btn.onclick()
   await settle()
   assert(spy.written.length === 1 && spy.written[0] === 'puts 1\n',
@@ -161,7 +199,7 @@ async function settle() {
   const spy = clipboardSpy()
   const pre = new FakeElement('pre', '', 'ary = []\n')
   runOnload([pre], spy.navigator)
-  const btn = pre.childByClass('highlight__copy-button')
+  const btn = copyButtonOf(pre)
   assert(btn !== null, 'plain <pre> without highlight class gets a COPY button')
   btn.onclick()
   await settle()
@@ -174,7 +212,7 @@ async function settle() {
   const pre = new FakeElement('pre', 'highlight c')
   pre.appendChild(new FakeElement('code', '', 'VALUE v;\n'))
   runOnload([pre], clipboardSpy().navigator)
-  assert(pre.childByClass('highlight__copy-button') !== null,
+  assert(copyButtonOf(pre) !== null,
          'pre.highlight.c gets a COPY button')
 }
 
@@ -183,7 +221,7 @@ async function settle() {
   const div = new FakeElement('div', 'highlight')
   const pre = new FakeElement('pre', '')
   runOnload([div, pre], clipboardSpy().navigator)
-  assert(div.childByClass('highlight__copy-button') === null,
+  assert(copyButtonOf(div) === null,
          'non-pre element does not get a COPY button')
 }
 
@@ -194,7 +232,7 @@ async function settle() {
   pre.appendChild(new FakeElement('span', 'caption', '例'))
   pre.appendChild(new FakeElement('code', '', 'p 42\n'))
   runOnload([pre], spy.navigator)
-  pre.childByClass('highlight__copy-button').onclick()
+  copyButtonOf(pre).onclick()
   await settle()
   assert(spy.written[0] === 'p 42\n',
          'caption text is excluded from the copied text')
@@ -207,25 +245,48 @@ async function settle() {
   const spy = clipboardSpy()
   const pre = new FakeElement('pre', '', '\n\nputs 1\n\n\n')
   runOnload([pre], spy.navigator)
-  pre.childByClass('highlight__copy-button').onclick()
+  copyButtonOf(pre).onclick()
   await settle()
   assert(spy.written[0] === 'puts 1\n',
          'copied text is trimmed (leading newlines dropped, trailing squeezed)')
 }
 
+// pre の直前に caption(タブ)があれば、ツールバーの左端に取り込まれる
+{
+  const caption = new FakeElement('span', 'caption', '例')
+  const pre = new FakeElement('pre', 'highlight ruby')
+  pre.appendChild(new FakeElement('code', '', 'p 42\n'))
+  const root = runOnload([caption, pre], clipboardSpy().navigator)
+  const toolbar = toolbarOf(pre)
+  assert(toolbar !== null && toolbar.firstChild === caption,
+         'a sibling caption is moved to the left edge of the toolbar')
+  assert(root.children.indexOf(caption) < 0,
+         'the caption is no longer a direct sibling of the pre')
+  assert(toolbar.childByClass('highlight__button-group') !== null,
+         'the button group sits in the same toolbar row as the caption')
+}
+
 // RUN 出力など、後から生成される pre にもボタンを付けられる公開フック。
 // getText はクリック時に評価されるので、内容が変わる要素にも使える
 {
   const spy = clipboardSpy()
   const pre = new FakeElement('pre', '')
-  runOnload([pre], spy.navigator)
+  const root = runOnload([pre], spy.navigator)
   assert(typeof globalThis.window.ruremaAddCopyButton === 'function',
          'window.ruremaAddCopyButton is exposed for dynamically created pre')
+  // 実際の run.js と同様、DOM に挿入してからフックを呼ぶ
   const output = new FakeElement('pre', 'highlight__run-output')
+  root.appendChild(output)
   let current = 'first output\n'
   const btn = globalThis.window.ruremaAddCopyButton(output, () => current)
-  assert(output.firstChild === btn,
-         'the hook prepends a COPY button to the given element')
+  assert(toolbarOf(output) !== null &&
+         buttonGroupOf(output).childByClass('highlight__copy-button') === btn,
+         'the hook inserts a toolbar with the COPY button before the element')
+  // 既にツールバーがある要素にもう一度呼んでも、ツールバーは1つのまま再利用される
+  globalThis.window.ruremaAddCopyButton(output, () => current)
+  assert(root.children.filter(
+           c => c.className === 'highlight__toolbar').length === 2,
+         'an existing toolbar is reused (one for the sample, one for the output)')
   btn.onclick()
   await settle()
   current = 'second output\n'
@@ -239,6 +300,8 @@ async function settle() {
 // Clipboard API が無い環境では textarea + execCommand にフォールバックする
 {
   const pre = new FakeElement('pre', '', 'fallback code\n')
+  const root = new FakeElement('div')
+  root.appendChild(pre)
   const elements = [pre]
   globalThis.document = makeDocument(elements)
   let captured = null
@@ -253,7 +316,7 @@ async function settle() {
   globalThis.navigator = {}   // clipboard なし
   ;(0, eval)(source)
   globalThis.window.onload()
-  const btn = pre.childByClass('highlight__copy-button')
+  const btn = copyButtonOf(pre)
   btn.onclick()
   await settle()
   assert(captured === 'fallback code\n',