add sqlEditor test; refactoring

src/hint.js

@@ -0,0 +1,45 @@
+import CM from 'codemirror'
+import 'codemirror/addon/hint/show-hint.js'
+import 'codemirror/addon/hint/sql-hint.js'
+import store from '@/store'
+import { debounce } from 'debounce'
+
+export function getHints (cm, options) {
+  const token = cm.getTokenAt(cm.getCursor()).string.toUpperCase()
+  const result = CM.hint.sql(cm, options)
+  // Don't show the hint if there is only one option
+  // and the token is already completed with this option
+  if (result.list.length === 1 && result.list[0].text.toUpperCase() === token) {
+    result.list = []
+  }
+  return result
+}
+
+const hintOptions = {
+  get tables () {
+    const tables = {}
+    if (store.state.schema) {
+      store.state.schema.forEach(table => {
+        tables[table.name] = table.columns.map(column => column.name)
+      })
+    }
+    return tables
+  },
+  completeSingle: false,
+  completeOnSingleClick: true,
+  alignWithWord: false
+}
+
+export default {
+  show: debounce(function (editor) {
+    // Don't show autocomplete after a space or semicolon or in string literals
+    const token = editor.getTokenAt(editor.getCursor())
+    const ch = token.string.slice(-1)
+    const tokenType = token.type
+    if (tokenType === 'string' || !ch || ch === ' ' || ch === ';') {
+      return
+    }
+
+    CM.showHint(editor, getHints, hintOptions)
+  }, 400)
+}