common: support more app/core properties

Support language, links up to date, and document security
flag and update unit test golden files.

common/appproperties.go

@@ -25,6 +25,8 @@ func NewAppProperties() AppProperties {
 	p := AppProperties{x: extended_properties.NewProperties()}
 	p.SetCompany("Baliance LLC")
 	p.SetApplication("baliance.com/gooxml")
+	p.SetDocSecurity(0)
+	p.SetLinksUpToDate(false)
 	p.SetApplicationVersion(strings.Replace(gooxml.ReleaseVersion, "v", "", -1))
 	return p
 }
@@ -38,6 +40,16 @@ func (a AppProperties) Application() string {
 	return ""
 }
 
+// SetLinksUpToDate sets the links up to date flag.
+func (a AppProperties) SetLinksUpToDate(v bool) {
+	a.x.LinksUpToDate = gooxml.Bool(v)
+}
+
+// SetDocSecurity sets the document security flag.
+func (a AppProperties) SetDocSecurity(v int32) {
+	a.x.DocSecurity = gooxml.Int32(v)
+}
+
 // SetApplication sets the name of the application that created the document.
 func (a AppProperties) SetApplication(s string) {
 	a.x.Application = &s

common/coreproperties.go

@@ -85,6 +85,12 @@ func (c CoreProperties) SetLastModifiedBy(s string) {
 	c.x.LastModifiedBy = &s
 }
 
+// SetLanguage records the language of the document.
+func (c CoreProperties) SetLanguage(s string) {
+	c.x.Language = &gooxml.XSDAny{XMLName: xml.Name{Local: "dc:language"}}
+	c.x.Language.Data = []byte(s)
+}
+
 const cpTimeFormatW3CDTF = "2006-01-02T15:04:05Z"
 
 func parseTime(x *gooxml.XSDAny) time.Time {