feat: update contentEditable property to plaintext-only

Author: SSShooter

src/mouse.ts

@@ -58,14 +58,14 @@ export default function (mind: MindElixirInstance) {
    */
   mind.map.addEventListener('mousemove', e => {
     // click trigger mousemove in windows chrome
-    if ((e.target as HTMLElement).contentEditable !== 'true') {
+    if ((e.target as HTMLElement).contentEditable === 'inherit') {
       dragMoveHelper.onMove(e, mind)
     }
   })
   mind.map.addEventListener('mousedown', e => {
     const mouseMoveButton = mind.mouseSelectionButton === 0 ? 2 : 0
     if (e.button !== mouseMoveButton) return
-    if ((e.target as HTMLElement).contentEditable !== 'true') {
+    if ((e.target as HTMLElement).contentEditable === 'inherit') {
       dragMoveHelper.moved = false
       dragMoveHelper.mousedown = true
     }

src/utils/dom.ts

@@ -143,7 +143,7 @@ export const editTopic = function (this: MindElixirInstance, el: Topic) {
   el.appendChild(div)
   div.id = 'input-box'
   div.textContent = origin
-  div.contentEditable = 'true'
+  div.contentEditable = 'plaintext-only'
   div.spellcheck = false
   const style = getComputedStyle(el)
   div.style.cssText = `min-width:${el.offsetWidth - 8}px;

src/utils/svg.ts

@@ -63,7 +63,7 @@ export const editSvgText = function (mei: MindElixirInstance, textEl: SVGTextEle
   const origin = textEl.innerHTML
   div.id = 'input-box'
   div.textContent = origin
-  div.contentEditable = 'true'
+  div.contentEditable = 'plaintext-only'
   div.spellcheck = false
   const bbox = textEl.getBBox()
   console.log(bbox)