#255 - add emoji input component

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

@@ -0,0 +1,106 @@
+import Completion from '../../services/completion/completion.js'
+import { take, filter, map } from 'lodash'
+
+const EmojiInput = {
+  props: [
+    'value',
+    'placeholder',
+    'type'
+  ],
+  data () {
+    return {
+      highlighted: 0,
+      caret: 0
+    }
+  },
+  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 {
+        return false
+      }
+    },
+    textAtCaret () {
+      return (this.wordAtCaret || {}).word || ''
+    },
+    wordAtCaret () {
+      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 || []
+    }
+  },
+  methods: {
+    replace (replacement) {
+      const newValue = Completion.replaceWord(this.value, this.wordAtCaret, replacement)
+      this.$emit('input', newValue)
+      this.caret = 0
+    },
+    replaceEmoji (e) {
+      const len = this.suggestions.length || 0
+      if (this.textAtCaret === ':' || e.ctrlKey) { return }
+      if (len > 0) {
+        e.preventDefault()
+        const emoji = this.suggestions[this.highlighted]
+        const replacement = emoji.utf || (emoji.shortcode + ' ')
+        const newValue = Completion.replaceWord(this.value, this.wordAtCaret, replacement)
+        this.$emit('input', newValue)
+        this.caret = 0
+        this.highlighted = 0
+      }
+    },
+    cycleBackward (e) {
+      const len = this.suggestions.length || 0
+      if (len > 0) {
+        e.preventDefault()
+        this.highlighted -= 1
+        if (this.highlighted < 0) {
+          this.highlighted = this.suggestions.length - 1
+        }
+      } else {
+        this.highlighted = 0
+      }
+    },
+    cycleForward (e) {
+      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
+        }
+      } else {
+        this.highlighted = 0
+      }
+    },
+    onKeydown (e) {
+      e.stopPropagation()
+    },
+    onInput (e) {
+      this.$emit('input', e.target.value)
+    },
+    setCaret ({target: {selectionStart}}) {
+      this.caret = selectionStart
+    }
+  }
+}
+
+export default EmojiInput