Fix DraftJS error when pasting over non-collapsed selection

addText uses insertText, so the handlePastedText method was failing if a user
was highlighting text and then pasting to replace the highlighted text.

(error was: Target range must be collapsed for `insertText`)

A similar method, replaceText, has been aded, and the handlePastedText method
has been updated to use replaceText instead.

src/__test__/plugin-test.js

@@ -314,7 +314,7 @@ describe('draft-js-markdown-shortcuts-plugin', () => {
           subject = () => plugin.handlePastedText(pastedText, html, store);
         });
         [
-          'addText',
+          'replaceText',
           'addEmptyBlock',
           'handleBlockType',
           'handleImage',
@@ -342,7 +342,7 @@ describe('draft-js-markdown-shortcuts-plugin', () => {
         describe('pasted just text', () => {
           beforeEach(() => {
             pastedText = 'hello';
-            createMarkdownShortcutsPlugin.__Rewire__('addText', modifierSpy); // eslint-disable-line no-underscore-dangle
+            createMarkdownShortcutsPlugin.__Rewire__('replaceText', modifierSpy); // eslint-disable-line no-underscore-dangle
           });
           it('returns handled', () => {
             expect(subject()).to.equal('handled');

src/__test__/utils-test.js

@@ -1,10 +1,11 @@
 import { expect } from 'chai';
-import Draft, { EditorState } from 'draft-js';
-import { addText, addEmptyBlock } from '../utils';
+import Draft, { EditorState, SelectionState } from 'draft-js';
+import { addText, replaceText, addEmptyBlock } from '../utils';
 
 describe('utils test', () => {
   it('is loaded', () => {
     expect(addText).to.be.a('function');
+    expect(replaceText).to.be.a('function');
     expect(addEmptyBlock).to.be.a('function');
   });
 
@@ -45,4 +46,26 @@ describe('utils test', () => {
     const lastBlock = currentContent.getLastBlock();
     expect(lastBlock.getText()).to.equal(randomText);
   });
+
+  it('should replaceText', () => {
+    let newEditorState = EditorState.createWithContent(Draft.convertFromRaw(newRawContentState));
+    const randomText = Date.now().toString(32);
+    let currentContent = newEditorState.getCurrentContent();
+    let lastBlock = currentContent.getLastBlock();
+    const newSelection = new SelectionState({
+      anchorKey: lastBlock.getKey(),
+      anchorOffset: 0,
+      focusKey: lastBlock.getKey(),
+      focusOffset: lastBlock.getText().length
+    });
+    newEditorState = EditorState.forceSelection(newEditorState, newSelection);
+
+    newEditorState = replaceText(newEditorState, randomText);
+    currentContent = newEditorState.getCurrentContent();
+    expect(currentContent.hasText()).to.equal(true);
+    lastBlock = currentContent.getLastBlock();
+    expect(lastBlock.getText()).to.equal(randomText);
+    const firstBlock = currentContent.getFirstBlock();
+    expect(firstBlock.getText()).to.equal(randomText);
+  });
 });

src/index.js

@@ -16,7 +16,7 @@ import leaveList from './modifiers/leaveList';
 import insertText from './modifiers/insertText';
 import createLinkDecorator from './decorators/link';
 import createImageDecorator from './decorators/image';
-import { addText, addEmptyBlock } from './utils';
+import { replaceText, addEmptyBlock } from './utils';
 
 const INLINE_STYLE_CHARACTERS = [' ', '*', '_'];
 
@@ -140,16 +140,16 @@ const createMarkdownShortcutsPlugin = (config = {}) => {
       let buffer = [];
       for (let i = 0; i < text.length; i++) { // eslint-disable-line no-plusplus
         if (INLINE_STYLE_CHARACTERS.indexOf(text[i]) >= 0) {
-          newEditorState = addText(newEditorState, buffer.join('') + text[i]);
+          newEditorState = replaceText(newEditorState, buffer.join('') + text[i]);
           newEditorState = checkCharacterForState(newEditorState, text[i]);
           buffer = [];
         } else if (text[i].charCodeAt(0) === 10) {
-          newEditorState = addText(newEditorState, buffer.join(''));
+          newEditorState = replaceText(newEditorState, buffer.join(''));
           newEditorState = addEmptyBlock(newEditorState);
           newEditorState = checkReturnForState(newEditorState, {});
           buffer = [];
         } else if (i === text.length - 1) {
-          newEditorState = addText(newEditorState, buffer.join('') + text[i]);
+          newEditorState = replaceText(newEditorState, buffer.join('') + text[i]);
           buffer = [];
         } else {
           buffer.push(text[i]);

src/utils.js

@@ -14,6 +14,11 @@ export function addText(editorState, bufferText) {
   return EditorState.push(editorState, contentState, 'insert-characters');
 }
 
+export function replaceText(editorState, bufferText) {
+  const contentState = Modifier.replaceText(editorState.getCurrentContent(), editorState.getSelection(), bufferText);
+  return EditorState.push(editorState, contentState, 'insert-characters');
+}
+
 export function addEmptyBlock(editorState) {
   let contentState = editorState.getCurrentContent();
   const emptyBlock = getEmptyContentBlock();