From 54e4f6974673b6baf4a45563c330333208424b12 Mon Sep 17 00:00:00 2001
From: "Qinghui.Liu" <Qinghui.Liu@fanruan.com>
Date: Wed, 13 Sep 2023 23:02:49 +0800
Subject: [PATCH] feat: breakText method support line wrapping text

---
 packages/x6-common/src/dom/text.ts | 30 +++++++++++++++++++++++++-----
 1 file changed, 25 insertions(+), 5 deletions(-)

diff --git a/packages/x6-common/src/dom/text.ts b/packages/x6-common/src/dom/text.ts
index 61d5685b9f3..a97eb6ad21b 100644
--- a/packages/x6-common/src/dom/text.ts
+++ b/packages/x6-common/src/dom/text.ts
@@ -1,6 +1,7 @@
 /* eslint-disable no-control-regex */
 
 import { Size } from '../types'
+import { StringExt } from '../string'
 import { Text } from '../text'
 import { attr } from './attr'
 import { Vector } from '../vector'
@@ -442,6 +443,30 @@ export function breakText(
   const width = size.width
   const height = size.height
   const eol = options.eol || '\n'
+  const fontSize = styles.fontSize || 14
+  const lineHeight = styles.lineHeight
+    ? parseFloat(styles.lineHeight)
+    : Math.ceil(fontSize * 1.4)
+  const maxLines = Math.floor(height / lineHeight)
+
+  if (text.indexOf(eol) > -1) {
+    const delimiter = StringExt.uuid()
+    const splitText: string[] = []
+
+    text.split(eol).map((fragment) => {
+      splitText.push(
+        ...breakText(
+          fragment,
+          { ...size, height: Number.MAX_SAFE_INTEGER },
+          styles,
+          { ...options, eol: delimiter },
+        ).split(delimiter),
+      )
+    })
+
+    return splitText.slice(0, maxLines).join(eol)
+  }
+
   const { width: textWidth } = measureText(text, styles)
 
   if (textWidth < width) {
@@ -449,11 +474,6 @@ export function breakText(
   }
 
   const lines = []
-  const fontSize = styles.fontSize || 14
-  const lineHeight = styles.lineHeight
-    ? parseFloat(styles.lineHeight)
-    : Math.ceil(fontSize * 1.4)
-  const maxLines = Math.floor(height / lineHeight)
 
   let remainText = text
   let remainWidth = textWidth