spellcheck -> context menu with spelling suggestions

browser/lib/contextMenuBuilder.js

@@ -0,0 +1,65 @@
+const {remote} = require('electron')
+const {Menu} = remote.require('electron')
+const spellcheck = require('./spellcheck')
+
+/**
+ * Creates the context menu that is shown when there is a right click in the editor of a (not-snippet) note.
+ * If the word is does not contains a spelling error (determined by the 'error style', no suggestions for corrections are requested
+ * => they are not visible in the context menu
+ * @param editor CodeMirror editor
+ * @param {MouseEvent} event that has triggered the creation of the context menu
+ * @returns {Electron.Menu} The created electron context menu
+ */
+const buildEditorContextMenu = function (editor, event) {
+  if (editor == null || event == null || event.pageX == null || event.pageY == null) {
+    return null
+  }
+  const cursor = editor.coordsChar({left: event.pageX, top: event.pageY})
+  const wordRange = editor.findWordAt(cursor)
+  const word = editor.getRange(wordRange.anchor, wordRange.head)
+  const existingMarks = editor.findMarks(wordRange.anchor, wordRange.head) || []
+  let isMisspelled = false
+  for (const mark of existingMarks) {
+    if (mark.className === spellcheck.getCSSClassName()) {
+      isMisspelled = true
+      break
+    }
+  }
+  let suggestion = []
+  if (isMisspelled) {
+    suggestion = spellcheck.getSpellingSuggestion(word)
+  }
+
+  const selection = {
+    isMisspelled: isMisspelled,
+    spellingSuggestions: suggestion
+  }
+  const template = [{
+    role: 'cut'
+  }, {
+    role: 'copy'
+  }, {
+    role: 'paste'
+  }, {
+    role: 'selectall'
+  }]
+
+  if (selection.isMisspelled) {
+    const suggestions = selection.spellingSuggestions
+    template.unshift.apply(template, suggestions.map(function (suggestion) {
+      return {
+        label: suggestion,
+        click: function (suggestion) {
+          if (editor != null) {
+            editor.replaceRange(suggestion.label, wordRange.anchor, wordRange.head)
+          }
+        }
+      }
+    }).concat({
+      type: 'separator'
+    }))
+  }
+  return Menu.buildFromTemplate(template)
+}
+
+module.exports = buildEditorContextMenu