fix: export image should be compatible with .text

Author: SSShooter

package.json

@@ -1,6 +1,6 @@
 {
   "name": "mind-elixir",
-  "version": "3.2.5",
+  "version": "3.2.6",
   "type": "module",
   "description": "Mind elixir is a free open source mind map core.",
   "keywords": [

src/index.less

@@ -248,6 +248,9 @@
       margin-bottom: 8px;
       object-fit: cover;
     }
+    & > .text {
+      display: inline-block;
+    }
   }
   .circle {
     position: absolute;

src/index.ts

@@ -126,7 +126,7 @@ MindElixir.DARK_THEME = DARK_THEME
  * @memberof MindElixir
  * @static
  */
-MindElixir.version = '3.2.5'
+MindElixir.version = '3.2.6'
 /**
  * @function
  * @memberof MindElixir

src/plugin/exportImage.ts

@@ -20,7 +20,12 @@ function lineHightToPadding(lineHeight: string, fontSize: string) {
 
 function generateSvgText(tpc: HTMLElement, tpcStyle: CSSStyleDeclaration, x: number, y: number) {
   const g = document.createElementNS('http://www.w3.org/2000/svg', 'g')
-  const content = tpc.childNodes[0].textContent
+  let content = ''
+  if ((tpc as Topic).text) {
+    content = (tpc as Topic).text.textContent!
+  } else {
+    content = tpc.childNodes[0].textContent!
+  }
   const lines = content!.split('\n')
   lines.forEach((line, index) => {
     const text = document.createElementNS('http://www.w3.org/2000/svg', 'text')
@@ -45,7 +50,12 @@ function generateSvgText(tpc: HTMLElement, tpcStyle: CSSStyleDeclaration, x: num
 }
 
 function generateSvgTextUsingForeignObject(tpc: HTMLElement, tpcStyle: CSSStyleDeclaration, x: number, y: number) {
-  const content = tpc.childNodes[0].textContent!
+  let content = ''
+  if ((tpc as Topic).text) {
+    content = (tpc as Topic).text.textContent!
+  } else {
+    content = tpc.childNodes[0].textContent!
+  }
   const foreignObject = document.createElementNS('http://www.w3.org/2000/svg', 'foreignObject')
   setAttributes(foreignObject, {
     x: x + parseInt(tpcStyle.paddingLeft) + '',
@@ -144,7 +154,7 @@ const generateSvg = (mei: MindElixirInstance, noForiegnObject = false) => {
   summaries && g.appendChild(summaries)
 
   mapDiv.querySelectorAll('me-tpc').forEach(tpc => {
-    g.appendChild(convertDivToSvg(mei, (tpc as Topic).text, noForiegnObject ? false : true))
+    g.appendChild(convertDivToSvg(mei, tpc as Topic, noForiegnObject ? false : true))
   })
   mapDiv.querySelectorAll('.tags > span').forEach(tag => {
     g.appendChild(convertDivToSvg(mei, tag as HTMLElement))