From 770026e956508e1ff0d1563617d7a3c8f212fb22 Mon Sep 17 00:00:00 2001
From: Ri Xu <xuri.me@gmail.com>
Date: Mon, 12 Mar 2018 20:14:39 +0800
Subject: [PATCH] - New function `SetSheetRow()` has been added for support
 write whole line at once, relate issue #96 and #194; - go test and godoc
 updated; - Note that this function performance has not been tested

---
 cell.go          | 42 ++++++++++++++++++++++++++++++++++++++++++
 excelize_test.go | 17 +++++++++++++++++
 2 files changed, 59 insertions(+)

diff --git a/cell.go b/cell.go
index 808c413a..281ab454 100644
--- a/cell.go
+++ b/cell.go
@@ -3,6 +3,7 @@ package excelize
 import (
 	"encoding/xml"
 	"fmt"
+	"reflect"
 	"strconv"
 	"strings"
 	"time"
@@ -483,6 +484,47 @@ func (f *File) SetCellDefault(sheet, axis, value string) {
 	xlsx.SheetData.Row[xAxis].C[yAxis].V = value
 }
 
+// SetSheetRow writes an array to row by given worksheet name, starting
+// coordinate and a pointer to array type 'slice'. For example, writes an
+// array to row 6 start with the cell B6 on Sheet1:
+//
+//     xlsx.SetSheetRow("Sheet1", "B6", &[]interface{}{"1", nil, 2})
+//
+func (f *File) SetSheetRow(sheet, axis string, slice interface{}) {
+	xlsx := f.workSheetReader(sheet)
+	axis = f.mergeCellsParser(xlsx, axis)
+	col := string(strings.Map(letterOnlyMapF, axis))
+	row, err := strconv.Atoi(strings.Map(intOnlyMapF, axis))
+	if err != nil {
+		return
+	}
+	// Make sure 'slice' is a Ptr to Slice
+	v := reflect.ValueOf(slice)
+	if v.Kind() != reflect.Ptr {
+		return
+	}
+	v = v.Elem()
+	if v.Kind() != reflect.Slice {
+		return
+	}
+
+	xAxis := row - 1
+	yAxis := TitleToNumber(col)
+
+	rows := xAxis + 1
+	cell := yAxis + 1
+
+	completeRow(xlsx, rows, cell)
+	completeCol(xlsx, rows, cell)
+
+	idx := 0
+	for i := cell - 1; i < v.Len()+cell-1; i++ {
+		c := ToAlphaString(i) + strconv.Itoa(row)
+		f.SetCellValue(sheet, c, v.Index(idx).Interface())
+		idx++
+	}
+}
+
 // checkCellInArea provides function to determine if a given coordinate is
 // within an area.
 func checkCellInArea(cell, area string) bool {
diff --git a/excelize_test.go b/excelize_test.go
index 41a2d7f8..2b67c9e8 100644
--- a/excelize_test.go
+++ b/excelize_test.go
@@ -1043,3 +1043,20 @@ func TestSharedStrings(t *testing.T) {
 	}
 	xlsx.GetRows("Sheet1")
 }
+
+func TestSetSheetRow(t *testing.T) {
+	xlsx, err := OpenFile("./test/Book1.xlsx")
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	xlsx.SetSheetRow("Sheet1", "B27", &[]interface{}{"cell", nil, int32(42), float64(42), time.Now()})
+	xlsx.SetSheetRow("Sheet1", "", &[]interface{}{"cell", nil, 2})
+	xlsx.SetSheetRow("Sheet1", "B27", []interface{}{})
+	xlsx.SetSheetRow("Sheet1", "B27", &xlsx)
+	err = xlsx.Save()
+	if err != nil {
+		t.Error(err)
+		return
+	}
+}