forked from unidoc/unioffice
/
mailmerge.go
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/
mailmerge.go
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// Copyright 2018 Baliance. All rights reserved.
package document
import (
"bytes"
"strings"
"unicode"
"github.com/Preciselyco/unioffice/schema/soo/wml"
)
type mergeFieldInfo struct {
fieldName string
followText string
beforeText string
upper bool
lower bool
firstCap bool
caps bool
// normal merge fields
para Paragraph
begIdx, sepIdx, endIdx int
// simple fields
pc *wml.EG_PContent
isSimple bool
}
func parseField(mf string) mergeFieldInfo {
//fields := strings.Fields(mf)
fields := []string{}
sb := bytes.Buffer{}
pq := -1
for i, c := range mf {
switch c {
case ' ':
if sb.Len() != 0 {
fields = append(fields, sb.String())
}
sb.Reset()
case '"':
if pq != -1 {
// this doesn't handled nested quotes, but it's good enough
// for the field info I've seen
fields = append(fields, mf[pq+1:i])
pq = -1
} else {
pq = i
}
default:
sb.WriteRune(c)
}
}
if sb.Len() != 0 {
fields = append(fields, sb.String())
}
field := mergeFieldInfo{}
for i := 0; i < len(fields)-1; i++ {
k := fields[i]
switch k {
case "MERGEFIELD":
field.fieldName = fields[i+1]
i++
case "\\f":
field.followText = fields[i+1]
i++
case "\\b":
field.beforeText = fields[i+1]
i++
case "\\*":
switch fields[i+1] {
case "Upper":
field.upper = true
case "Lower":
field.lower = true
case "Caps":
field.caps = true
case "FirstCap":
field.firstCap = true
}
i++
}
}
return field
}
// MergeFields returns the list of all mail merge fields found in the document.
func (d Document) mergeFields() []mergeFieldInfo {
paragraphs := []Paragraph{}
mf := []mergeFieldInfo{}
for _, t := range d.Tables() {
for _, r := range t.Rows() {
for _, c := range r.Cells() {
paragraphs = append(paragraphs, c.Paragraphs()...)
}
}
}
paragraphs = append(paragraphs, d.Paragraphs()...)
for _, p := range paragraphs {
runs := p.Runs()
begIdx := -1
sepIdx := -1
endIdx := -1
mergeField := mergeFieldInfo{}
for _, pc := range p.x.EG_PContent {
for _, fs := range pc.FldSimple {
if strings.Contains(fs.InstrAttr, "MERGEFIELD") {
f := parseField(fs.InstrAttr)
f.isSimple = true
f.para = p
f.pc = pc
mf = append(mf, f)
}
}
}
for i := 0; i < len(runs); i++ {
r := runs[i]
for _, ic := range r.X().EG_RunInnerContent {
if ic.FldChar != nil {
switch ic.FldChar.FldCharTypeAttr {
case wml.ST_FldCharTypeBegin:
begIdx = i
case wml.ST_FldCharTypeSeparate:
sepIdx = i
case wml.ST_FldCharTypeEnd:
endIdx = i
if mergeField.fieldName != "" {
mergeField.para = p
mergeField.begIdx = begIdx
mergeField.endIdx = endIdx
mergeField.sepIdx = sepIdx
mf = append(mf, mergeField)
}
begIdx = -1
sepIdx = -1
endIdx = -1
mergeField = mergeFieldInfo{}
}
} else if ic.InstrText != nil && strings.Contains(ic.InstrText.Content, "MERGEFIELD") {
if begIdx != -1 && endIdx == -1 {
mergeField = parseField(ic.InstrText.Content)
}
}
}
}
}
return mf
}
// MergeFields returns the list of all mail merge fields found in the document.
func (d Document) MergeFields() []string {
flds := map[string]struct{}{}
for _, mf := range d.mergeFields() {
flds[mf.fieldName] = struct{}{}
}
ret := []string{}
for k := range flds {
ret = append(ret, k)
}
return ret
}
// MailMerge finds mail merge fields and replaces them with the text provided. It also removes
// the mail merge source info from the document settings.
func (d *Document) MailMerge(mergeContent map[string]string) {
fields := d.mergeFields()
remove := map[Paragraph][]Run{}
for _, v := range fields {
repText, ok := mergeContent[v.fieldName]
if ok {
if v.upper {
repText = strings.ToUpper(repText)
} else if v.lower {
repText = strings.ToLower(repText)
} else if v.caps {
repText = strings.Title(repText)
} else if v.firstCap {
sb := bytes.Buffer{}
for i, v := range repText {
if i == 0 {
sb.WriteRune(unicode.ToUpper(v))
} else {
sb.WriteRune(v)
}
}
repText = sb.String()
}
if repText != "" && v.beforeText != "" {
repText = v.beforeText + repText
}
if repText != "" && v.followText != "" {
repText = repText + v.followText
}
}
if v.isSimple {
// simple field replacement, just promote the run
if len(v.pc.FldSimple) == 1 &&
len(v.pc.FldSimple[0].EG_PContent) == 1 &&
len(v.pc.FldSimple[0].EG_PContent[0].EG_ContentRunContent) == 1 {
rc := &wml.EG_ContentRunContent{}
rc.R = v.pc.FldSimple[0].EG_PContent[0].EG_ContentRunContent[0].R
v.pc.FldSimple = nil
run := Run{d, rc.R}
run.ClearContent()
run.AddText(repText)
v.pc.EG_ContentRunContent = append(v.pc.EG_ContentRunContent, rc)
}
} else {
// non-simple so we'll remove the extra stuff
runs := v.para.Runs()
for i := v.begIdx; i <= v.endIdx; i++ {
if i == v.sepIdx+1 {
runs[i].ClearContent()
runs[i].AddText(repText)
} else {
remove[v.para] = append(remove[v.para], runs[i])
}
}
}
}
// remove any of the mail merge field runs except for the one immediately after 'separate'
for p, runs := range remove {
for _, r := range runs {
p.RemoveRun(r)
}
}
d.Settings.RemoveMailMerge()
}