feat: allow continuation of expander menu

README.md

@@ -80,6 +80,7 @@ The returned fragment should be consisted of filtered `[role=option]` items to b
 - `key`: The matched key; for example: `:`.
 - `item`: The selected item. This would be one of the `[role=option]`. Use this to work out the `value`.
 - `value`: A null value placeholder to replace the query. To replace the text query, simply re-assign this value.
+- `continue`: A boolean value to specify whether to continue autocompletion after inserting a value. Defaults to `false`. If set to `true`, will not add a space after inserted value and will keep firing the `text-expander-change` event.
 
 ```js
 const expander = document.querySelector('text-expander')

src/text-expander-element.ts

@@ -120,12 +120,18 @@ class TextExpander {
     const beginning = this.input.value.substring(0, match.position - match.key.length)
     const remaining = this.input.value.substring(match.position + match.text.length)
 
-    const detail = {item, key: match.key, value: null}
+    const detail = {item, key: match.key, value: null, continue: false}
     const canceled = !this.expander.dispatchEvent(new CustomEvent('text-expander-value', {cancelable: true, detail}))
     if (canceled) return
 
     if (!detail.value) return
+
     const suffix = this.expander.getAttribute('suffix') ?? ' '
+
+    if (detail.continue) {
+      suffix = ''
+    }
+
     const value = `${detail.value}${suffix}`
 
     this.input.value = beginning + value + remaining
@@ -139,8 +145,11 @@ class TextExpander {
 
     this.input.selectionStart = cursor
     this.input.selectionEnd = cursor
-    this.lookBackIndex = cursor
-    this.match = null
+
+    if (!detail.continue) {
+      this.lookBackIndex = cursor
+      this.match = null
+    }
 
     this.expander.dispatchEvent(
       new CustomEvent('text-expander-committed', {cancelable: false, detail: {input: this.input}})

test/text-expander-element-test.js

@@ -92,6 +92,77 @@ describe('text-expander element', function () {
 
       assert.deepEqual(receivedText, expectedText)
     })
+
+    it('dispatches value event after selecting item and closes', async function () {
+      const expander = document.querySelector('text-expander')
+      const input = expander.querySelector('textarea')
+      const menu = document.createElement('ul')
+      const item = document.createElement('li')
+      item.setAttribute('role', 'option')
+      menu.appendChild(item)
+
+      expander.addEventListener('text-expander-change', event => {
+        const {provide} = event.detail
+        provide(Promise.resolve({matched: true, fragment: menu}))
+      })
+
+      expander.addEventListener('text-expander-value', event => {
+        event.detail.value = ':1'
+      })
+
+      input.focus()
+      triggerInput(input, ':')
+      await waitForAnimationFrame()
+      assert.exists(expander.querySelector('ul'))
+
+      const result = once(expander, 'text-expander-value')
+      expander.querySelector('li').click()
+      const event = await result
+      assert.equal(false, event.detail.continue)
+
+      assert.equal(input.value, ':1 ')
+
+      await waitForAnimationFrame()
+      assert.isNull(expander.querySelector('ul'))
+    })
+
+    it('dispatches value event after selecting item and keeps menu open', async function () {
+      const expander = document.querySelector('text-expander')
+      const input = expander.querySelector('textarea')
+      const menu = document.createElement('ul')
+      const item = document.createElement('li')
+      item.setAttribute('role', 'option')
+      menu.appendChild(item)
+
+      expander.addEventListener('text-expander-change', event => {
+        const {provide} = event.detail
+        // eslint-disable-next-line no-console
+        console.log('ASDFSDF', event.detail)
+        provide(Promise.resolve({matched: true, fragment: menu}))
+      })
+
+      expander.addEventListener('text-expander-value', event => {
+        event.detail.value = ':1'
+        event.detail.continue = true
+      })
+
+      input.focus()
+      triggerInput(input, ':')
+      await waitForAnimationFrame()
+      assert.exists(expander.querySelector('ul'))
+
+      const result = once(expander, 'text-expander-value')
+      expander.querySelector('li').click()
+      const event = await result
+      assert.equal(true, event.detail.continue)
+
+      triggerInput(input, '#1', true)
+
+      assert.equal(input.value, ':1#1')
+
+      await waitForAnimationFrame()
+      assert.exists(expander.querySelector('ul'))
+    })
   })
 
   describe('multi-word scenarios', function () {