From 0608c394259146682e59ab69bdee6b10bd82d993 Mon Sep 17 00:00:00 2001
From: Evgeni B <26095528+devgeni@users.noreply.github.com>
Date: Mon, 25 Oct 2021 19:37:15 +0300
Subject: [PATCH] feat: insert new row on enter at the last row

---
 src/component/sheet.js |  7 +++++++
 src/core/data_proxy.js | 14 ++++++++++++++
 src/core/row.js        | 18 ++++++++++++++++++
 3 files changed, 39 insertions(+)

diff --git a/src/component/sheet.js b/src/component/sheet.js
index 918e023a..a8487e10 100644
--- a/src/component/sheet.js
+++ b/src/component/sheet.js
@@ -505,6 +505,8 @@ function insertDeleteRowColumn(type) {
   if (data.settings.mode === 'read') return;
   if (type === 'insert-row') {
     data.insert('row');
+  } else if (type === 'insert-row-below') {
+    data.insertRowBelow();
   } else if (type === 'delete-row') {
     data.delete('row');
   } else if (type === 'insert-column') {
@@ -831,6 +833,11 @@ function sheetInitEvents() {
           break;
         case 13: // enter
           editor.clear();
+          const { eri } = this.selector.range;
+          const rows = this.data.rows;
+          if (eri === rows.len - 1 && !shiftKey) {
+            insertDeleteRowColumn.call(this, 'insert-row-below');
+          }
           // shift + enter => move up
           // enter => move down
           selectorMove.call(this, false, shiftKey ? 'up' : 'down');
diff --git a/src/core/data_proxy.js b/src/core/data_proxy.js
index a59ef6ef..ed80fd5e 100644
--- a/src/core/data_proxy.js
+++ b/src/core/data_proxy.js
@@ -848,6 +848,20 @@ export default class DataProxy {
     });
   }
 
+  insertRowBelow(n = 1) {
+    this.changeData(() => {
+      const { sri } = this.selector.range;
+      const { rows, merges } = this;
+      let si = sri;
+      rows.insertBelow(sri, n);
+      merges.shift('row', si, n, (ri, ci, rn, cn) => {
+        const cell = rows.getCell(ri, ci);
+        cell.merge[0] += rn;
+        cell.merge[1] += cn;
+      });
+    });
+  }
+
   // type: row | column
   delete(type) {
     this.changeData(() => {
diff --git a/src/core/row.js b/src/core/row.js
index dc3243a7..c2dff3fb 100644
--- a/src/core/row.js
+++ b/src/core/row.js
@@ -225,6 +225,24 @@ class Rows {
     this.len += n;
   }
 
+  insertBelow(sri, n = 1) {
+    const ndata = {};
+    this.each((ri, row) => {
+      let nri = parseInt(ri, 10);
+      if (nri > sri) {
+        nri += n;
+        this.eachCells(ri, (ci, cell) => {
+          if (cell.text && cell.text[0] === '=') {
+            cell.text = cell.text.replace(/[a-zA-Z]{1,3}\d+/g, word => expr2expr(word, 0, n, (x, y) => y >= sri));
+          }
+        });
+      }
+      ndata[nri] = row;
+    });
+    this._ = ndata;
+    this.len += n;
+  }
+
   delete(sri, eri) {
     const n = eri - sri + 1;
     const ndata = {};