slot-based emoji input/autocomplete component

src/components/emoji-input/emoji-input.js

@@ -1,15 +1,17 @@
 import Completion from '../../services/completion/completion.js'
-import { take, filter, map } from 'lodash'
+import { take } from 'lodash'
 
 const EmojiInput = {
   props: [
-    'value',
     'placeholder',
+    'suggest',
+    'value',
     'type',
     'classname'
   ],
   data () {
     return {
+      input: undefined,
       highlighted: 0,
       caret: 0
     }
@@ -17,35 +19,46 @@ const EmojiInput = {
   computed: {
     suggestions () {
       const firstchar = this.textAtCaret.charAt(0)
-      if (firstchar === ':') {
-        if (this.textAtCaret === ':') { return }
-        const matchedEmoji = filter(this.emoji.concat(this.customEmoji), (emoji) => emoji.shortcode.startsWith(this.textAtCaret.slice(1)))
-        if (matchedEmoji.length <= 0) {
-          return false
-        }
-        return map(take(matchedEmoji, 5), ({shortcode, image_url, utf}, index) => ({
-          shortcode: `:${shortcode}:`,
-          utf: utf || '',
-          // eslint-disable-next-line camelcase
-          img: utf ? '' : this.$store.state.instance.server + image_url,
-          highlighted: index === this.highlighted
-        }))
-      } else {
+      if (this.textAtCaret === firstchar) { return }
+      const matchedSuggestions = this.suggest(this.textAtCaret)
+      if (matchedSuggestions.length <= 0) {
         return false
       }
+      return take(matchedSuggestions, 5).map(({shortcode, image_url, replacement}, index) => ({
+        shortcode,
+        replacement,
+        // eslint-disable-next-line camelcase
+        img: !image_url ? '' : this.$store.state.instance.server + image_url,
+        highlighted: index === this.highlighted
+      }))
     },
     textAtCaret () {
       return (this.wordAtCaret || {}).word || ''
     },
     wordAtCaret () {
-      const word = Completion.wordAtPosition(this.value, this.caret - 1) || {}
-      return word
+      if (this.value && this.caret) {
+        const word = Completion.wordAtPosition(this.value, this.caret - 1) || {}
+        return word
+      }
     },
-    emoji () {
-      return this.$store.state.instance.emoji || []
-    },
-    customEmoji () {
-      return this.$store.state.instance.customEmoji || []
+  },
+  mounted () {
+    const slots = this.$slots.default
+    if (slots.length === 0) return
+    const input = slots.find(slot => ['input', 'textarea'].includes(slot.tag))
+    if (!input) return
+    this.input = input
+    input.elm.addEventListener('keyup', this.setCaret)
+    input.elm.addEventListener('paste', this.setCaret)
+    input.elm.addEventListener('focus', this.setCaret)
+    input.elm.addEventListener('keydown', this.onKeyDown)
+  },
+  unmounted () {
+    if (this.input) {
+      this.input.elm.removeEventListener('keyup', this.setCaret)
+      this.input.elm.removeEventListener('paste', this.setCaret)
+      this.input.elm.removeEventListener('focus', this.setCaret)
+      this.input.elm.removeEventListener('keydown', this.onKeyDown)
     }
   },
   methods: {
@@ -54,23 +67,21 @@ const EmojiInput = {
       this.$emit('input', newValue)
       this.caret = 0
     },
-    replaceEmoji (e) {
+    replaceText () {
       const len = this.suggestions.length || 0
-      if (this.textAtCaret === ':' || e.ctrlKey) { return }
+      if (this.textAtCaret.length === 1) { return }
       if (len > 0) {
-        e.preventDefault()
-        const emoji = this.suggestions[this.highlighted]
-        const replacement = emoji.utf || (emoji.shortcode + ' ')
+        const suggestion = this.suggestions[this.highlighted]
+        const replacement = suggestion.replacement
         const newValue = Completion.replaceWord(this.value, this.wordAtCaret, replacement)
         this.$emit('input', newValue)
         this.caret = 0
         this.highlighted = 0
       }
     },
-    cycleBackward (e) {
+    cycleBackward () {
       const len = this.suggestions.length || 0
       if (len > 0) {
-        e.preventDefault()
         this.highlighted -= 1
         if (this.highlighted < 0) {
           this.highlighted = this.suggestions.length - 1
@@ -79,11 +90,9 @@ const EmojiInput = {
         this.highlighted = 0
       }
     },
-    cycleForward (e) {
+    cycleForward () {
       const len = this.suggestions.length || 0
       if (len > 0) {
-        if (e.shiftKey) { return }
-        e.preventDefault()
         this.highlighted += 1
         if (this.highlighted >= len) {
           this.highlighted = 0
@@ -92,13 +101,33 @@ const EmojiInput = {
         this.highlighted = 0
       }
     },
-    onKeydown (e) {
+    onKeyDown (e) {
+      this.setCaret(e)
       e.stopPropagation()
+
+      const { ctrlKey, shiftKey, key } = e
+      if (key === 'Tab') {
+        if (shiftKey) {
+          this.cycleBackward()
+        } else {
+          this.cycleForward()
+        }
+      }
+      if (key === 'ArrowUp') {
+        this.cycleBackward()
+      } else if (key === 'ArrowDown') {
+        this.cycleForward()
+      }
+      if (key === 'Enter') {
+        if (!ctrlKey) {
+          this.replaceText()
+        }
+      }
     },
     onInput (e) {
       this.$emit('input', e.target.value)
     },
-    setCaret ({target: {selectionStart}}) {
+    setCaret ({ target: { selectionStart, value } }) {
       this.caret = selectionStart
     }
   }