From 89b85934f60ba0012f3de6da03eb12959e4b4b72 Mon Sep 17 00:00:00 2001
From: xuri <xuri.me@gmail.com>
Date: Mon, 27 Dec 2021 23:34:14 +0800
Subject: This closes #1096, memory usage optimization and another 4 changes

- Unzip shared string table to system temporary file when large inner XML, reduce memory usage about 70%
- Remove unnecessary exported variable `XMLHeader`, we can using `encoding/xml` package's `xml.Header` instead of it
- Using constant instead of inline text for default XML path
- Rename exported option field `WorksheetUnzipMemLimit` to `UnzipXMLSizeLimit`
- Unit test and documentation updated
---
 templates.go | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

(limited to 'templates.go')

diff --git a/templates.go b/templates.go
index 56588c4..1783d7c 100644
--- a/templates.go
+++ b/templates.go
@@ -14,13 +14,22 @@
 
 package excelize
 
-// XMLHeader define an XML declaration can also contain a standalone declaration.
-const XMLHeader = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n"
+import "encoding/xml"
 
 var (
 	// XMLHeaderByte define an XML declaration can also contain a standalone
 	// declaration.
-	XMLHeaderByte = []byte(XMLHeader)
+	XMLHeaderByte = []byte(xml.Header)
+)
+
+const (
+	defaultXMLPathContentTypes  = "[Content_Types].xml"
+	dafaultXMLPathDocPropsApp   = "docProps/app.xml"
+	dafaultXMLPathDocPropsCore  = "docProps/core.xml"
+	dafaultXMLPathCalcChain     = "xl/calcChain.xml"
+	dafaultXMLPathSharedStrings = "xl/sharedStrings.xml"
+	defaultXMLPathStyles        = "xl/styles.xml"
+	defaultXMLPathWorkbook      = "xl/workbook.xml"
 )
 
 const templateDocpropsApp = `<Properties xmlns="http://schemas.openxmlformats.org/officeDocument/2006/extended-properties" xmlns:vt="http://schemas.openxmlformats.org/officeDocument/2006/docPropsVTypes"><TotalTime>0</TotalTime><Application>Go Excelize</Application></Properties>`
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