add SplitByParagraph

.github/workflows/pull.yml

@@ -8,7 +8,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@master
         with:
-          go-version: 1.19
+          go-version: '1.20'
 
       - name: Check out code into the Go module directory
         uses: actions/checkout@master

.github/workflows/push.yml

@@ -8,7 +8,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@master
         with:
-          go-version: 1.19
+          go-version: '1.20'
 
       - name: Check out code into the Go module directory
         uses: actions/checkout@master

.golangci.yml

@@ -59,7 +59,7 @@ run:
   tests: false
   skip-dirs:
     - order
-  go: '1.19'
+  go: '1.20'
 
 # output configuration options
 output:

apitable.go

@@ -23,7 +23,7 @@ package docx
 // AddTable add a new table to body by col*row
 //
 // unit: twips (1/20 point)
-func (f *Docx) AddTable(row int, col int) *WTable {
+func (f *Docx) AddTable(row int, col int) *Table {
 	trs := make([]*WTableRow, row)
 	for i := 0; i < row; i++ {
 		cells := make([]*WTableCell, col)
@@ -40,7 +40,7 @@ func (f *Docx) AddTable(row int, col int) *WTable {
 			TableCells:         cells,
 		}
 	}
-	tbl := &WTable{
+	tbl := &Table{
 		TableProperties: &WTableProperties{
 			Width: &WTableWidth{Type: "auto"},
 			TableBorders: &WTableBorders{
@@ -65,7 +65,7 @@ func (f *Docx) AddTable(row int, col int) *WTable {
 // AddTableTwips add a new table to body by height and width
 //
 // unit: twips (1/20 point)
-func (f *Docx) AddTableTwips(rowHeights []int64, colWidths []int64) *WTable {
+func (f *Docx) AddTableTwips(rowHeights []int64, colWidths []int64) *Table {
 	grids := make([]*WGridCol, len(colWidths))
 	trs := make([]*WTableRow, len(rowHeights))
 	for i, w := range colWidths {
@@ -95,7 +95,7 @@ func (f *Docx) AddTableTwips(rowHeights []int64, colWidths []int64) *WTable {
 			}
 		}
 	}
-	tbl := &WTable{
+	tbl := &Table{
 		TableProperties: &WTableProperties{
 			Width: &WTableWidth{Type: "auto"},
 			TableBorders: &WTableBorders{
@@ -127,7 +127,7 @@ func (f *Docx) AddTableTwips(rowHeights []int64, colWidths []int64) *WTable {
 //		end：右对齐。
 //		both：两端对齐。
 //		distribute：分散对齐。
-func (t *WTable) Justification(val string) *WTable {
+func (t *Table) Justification(val string) *Table {
 	if t.TableProperties.Justification == nil {
 		t.TableProperties.Justification = &Justification{Val: val}
 		return t

cmd/main/main.go

@@ -192,7 +192,7 @@ func main() {
 	fmt.Println("Plain text:")
 	for _, it := range doc.Document.Body.Items {
 		switch it.(type) {
-		case *docx.Paragraph, *docx.WTable: // printable
+		case *docx.Paragraph, *docx.Table: // printable
 			fmt.Println(it)
 		}
 	}

docx.go

@@ -24,7 +24,6 @@ package docx
 
 import (
 	"archive/zip"
-	"bytes"
 	"io"
 	"io/fs"
 	"sync"
@@ -50,9 +49,6 @@ type Docx struct {
 	tmplfs   fs.FS
 	tmpfslst []string
 
-	buf        *bytes.Buffer
-	isbufempty bool
-
 	io.Reader
 	io.WriterTo
 }
@@ -109,20 +105,9 @@ func (f *Docx) WriteTo(writer io.Writer) (_ int64, err error) {
 	return 0, f.pack(zipWriter)
 }
 
-// Read allows to save a docx to buf
+// Read is a fake function and cannot be used
 func (f *Docx) Read(p []byte) (n int, err error) {
-	if !f.isbufempty {
-		n, err = f.buf.Read(p)
-		if err == io.EOF {
-			f.buf.Reset()
-			f.isbufempty = true
-			return
-		}
-	}
-	zipWriter := zip.NewWriter(f.buf)
-	defer zipWriter.Close()
-	f.isbufempty = false
-	return f.buf.Read(p)
+	panic("fake stub!")
 }
 
 // UseTemplate will replace template files

empty.go

@@ -21,7 +21,6 @@
 package docx
 
 import (
-	"bytes"
 	"encoding/xml"
 )
 
@@ -71,7 +70,6 @@ func newEmptyA4File() *Docx {
 		slowIDs:      make(map[string]uintptr, 64),
 		template:     "a4",
 		tmpfslst:     A4TemplateFilesList,
-		buf:          bytes.NewBuffer(make([]byte, 0, 1024*1024)),
 	}
 	docx.Document.Body.file = docx
 	return docx

go.mod

@@ -1,5 +1,5 @@
 module github.com/fumiama/go-docx
 
-go 1.18
+go 1.20
 
 require github.com/fumiama/imgsz v0.0.2

structdoc.go

@@ -81,7 +81,7 @@ func (b *Body) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
 				value.file = b.file
 				b.Items = append(b.Items, &value)
 			case "tbl":
-				var value WTable
+				var value Table
 				err = d.DecodeElement(&value, &tt)
 				if err != nil && !strings.HasPrefix(err.Error(), "expected") {
 					return err
@@ -146,3 +146,131 @@ func (doc *Document) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error
 	}
 	return nil
 }
+
+// ParagraphSplitRule check whether the paragraph is a separator or not
+type ParagraphSplitRule func(*Paragraph) bool
+
+// SplitByParagraph splits a doc to many docs by using a matched paragraph
+// as the separator.
+//
+// The separator will be placed to the first doc item
+func (doc *Docx) SplitByParagraph(separator ParagraphSplitRule) (docs []*Docx) {
+	items := doc.Document.Body.Items
+newdoclop:
+	for len(items) > 0 {
+		ndoc := new(Docx)
+
+		// migrate base data
+		ndoc.mediaNameIdx = make(map[string]int, 64)
+		ndoc.slowIDs = make(map[string]uintptr, 64)
+		ndoc.template = doc.template
+		ndoc.tmplfs = doc.tmplfs
+		ndoc.tmpfslst = doc.tmpfslst
+
+		ndoc.Document.XMLW = XMLNS_W
+		ndoc.Document.XMLR = XMLNS_R
+		ndoc.Document.XMLWP = XMLNS_WP
+		// ndoc.Document.XMLMC = XMLNS_MC
+		// ndoc.Document.XMLO = XMLNS_O
+		// ndoc.Document.XMLV = XMLNS_V
+		ndoc.Document.XMLWPS = XMLNS_WPS
+		ndoc.Document.XMLWPC = XMLNS_WPC
+		ndoc.Document.XMLWPG = XMLNS_WPG
+		// ndoc.Document.XMLWP14 = XMLNS_WP14
+		ndoc.Document.XMLName.Space = XMLNS_W
+		ndoc.Document.XMLName.Local = "document"
+		ndoc.Document.Body.file = ndoc
+
+		ndoc.docRelation = Relationships{
+			Xmlns: XMLNS_REL,
+			Relationship: []Relationship{
+				{
+					ID:     "rId1",
+					Type:   `http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles`,
+					Target: "styles.xml",
+				},
+				{
+					ID:     "rId2",
+					Type:   `http://schemas.openxmlformats.org/officeDocument/2006/relationships/theme`,
+					Target: "theme/theme1.xml",
+				},
+				{
+					ID:     "rId3",
+					Type:   `http://schemas.openxmlformats.org/officeDocument/2006/relationships/fontTable`,
+					Target: "fontTable.xml",
+				},
+			},
+		}
+
+		ndoc.rID = 3
+
+		for i, item := range items {
+			switch o := item.(type) {
+			case *Paragraph:
+				if separator(o) && len(ndoc.Document.Body.Items) > 0 {
+					items = items[i:]
+					docs = append(docs, ndoc)
+					continue newdoclop
+				}
+				np := o.copymedia(ndoc)
+				ndoc.Document.Body.Items = append(ndoc.Document.Body.Items, &np)
+			case *Table:
+				nt := o.copymedia(ndoc)
+				ndoc.Document.Body.Items = append(ndoc.Document.Body.Items, &nt)
+			default:
+				ndoc.Document.Body.Items = append(ndoc.Document.Body.Items, o)
+			}
+		}
+
+		if len(ndoc.Document.Body.Items) > 0 {
+			docs = append(docs, ndoc)
+		}
+		break
+	}
+	return
+}
+
+func (p *Paragraph) copymedia(to *Docx) (np Paragraph) {
+	np = *p
+	np.Children = make([]interface{}, 0, len(p.Children))
+	np.file = to
+	for _, pc := range p.Children {
+		if r, ok := pc.(*Run); ok {
+			nr := *r
+			nr.Children = make([]interface{}, 0, len(r.Children))
+			nr.file = to
+			for _, rc := range r.Children {
+				if d, ok := rc.(*Drawing); ok {
+					nr.Children = append(nr.Children, d.copymedia(to))
+					continue
+				}
+				nr.Children = append(nr.Children, rc)
+			}
+			continue
+		}
+		np.Children = append(np.Children, pc)
+	}
+	return
+}
+
+func (t *Table) copymedia(to *Docx) (nt Table) {
+	nt = *t
+	nt.TableRows = make([]*WTableRow, 0, len(t.TableRows))
+	nt.file = to
+	for _, tr := range t.TableRows {
+		ntr := *tr
+		ntr.TableCells = make([]*WTableCell, 0, len(tr.TableCells))
+		ntr.file = to
+		for _, tc := range tr.TableCells {
+			ntc := *tc
+			ntc.Paragraphs = make([]Paragraph, 0, len(tc.Paragraphs))
+			ntc.file = to
+			for _, p := range tc.Paragraphs {
+				ntc.Paragraphs = append(ntc.Paragraphs, p.copymedia(to))
+			}
+			ntr.TableCells = append(ntr.TableCells, &ntc)
+		}
+		nt.TableRows = append(nt.TableRows, &ntr)
+	}
+	return
+}

structdrawing.go

@@ -27,6 +27,7 @@ import (
 	"io"
 	"strconv"
 	"strings"
+	"sync/atomic"
 )
 
 //nolint:revive,stylecheck
@@ -89,6 +90,22 @@ func (r *Drawing) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
 	return nil
 }
 
+func (r *Drawing) copymedia(to *Docx) *Drawing {
+	if r.Inline != nil {
+		return &Drawing{
+			Inline: r.Inline.copymedia(to),
+			file:   to,
+		}
+	}
+	if r.Anchor != nil {
+		return &Drawing{
+			Anchor: r.Anchor.copymedia(to),
+			file:   to,
+		}
+	}
+	return &Drawing{file: to}
+}
+
 // WPInline is an element that represents an inline image within a text paragraph.
 //
 // It contains information about the image's size and position,
@@ -275,6 +292,64 @@ func (r *WPInline) String() string {
 	return "![inln?](unknown)"
 }
 
+func (r *WPInline) copymedia(to *Docx) *WPInline {
+	if r.Graphic.GraphicData.Pic != nil {
+		if r.Graphic.GraphicData.Pic.BlipFill != nil {
+			tgt, err := r.file.ReferTarget(r.Graphic.GraphicData.Pic.BlipFill.Blip.Embed)
+			if err != nil {
+				return nil
+			}
+			format := tgt[strings.LastIndex(tgt, ".")+1:]
+			idn := int(atomic.AddUintptr(&to.docID, 1))
+			id := int(to.IncreaseID("图片"))
+			ids := strconv.Itoa(id)
+			m := r.file.Media(tgt[6:])
+			if m == nil {
+				return nil
+			}
+			rid := to.addImage(format, m.Data)
+			inln := *r
+			grph := *r.Graphic
+			inln.Graphic = &grph
+			grphdata := *r.Graphic.GraphicData
+			grph.GraphicData = &grphdata
+			pic := *r.Graphic.GraphicData.Pic
+			grphdata.Pic = &pic
+			grphdata.file = to
+			grph.file = to
+			inln.file = to
+
+			inln.DocPr = &WPDocPr{
+				ID:   idn,
+				Name: "图片 " + ids,
+			}
+			pic.NonVisualPicProperties = &PICNonVisualPicProperties{
+				NonVisualDrawingProperties: NonVisualProperties{
+					ID:   id,
+					Name: "图片 " + ids,
+				},
+				CNvPicPr: r.Graphic.GraphicData.Pic.NonVisualPicProperties.CNvPicPr,
+			}
+			pic.BlipFill = &PICBlipFill{
+				Blip: ABlip{
+					Embed:  rid,
+					Cstate: r.Graphic.GraphicData.Pic.BlipFill.Blip.Cstate,
+				},
+				Stretch: r.Graphic.GraphicData.Pic.BlipFill.Stretch,
+			}
+			return &inln
+		}
+		return nil
+	}
+	if r.Graphic.GraphicData.Shape != nil { // shape has no media
+		return r
+	}
+	if r.Graphic.GraphicData.Canvas != nil { //TODO: copy canvas media
+		return r
+	}
+	return nil
+}
+
 // WPExtent represents the extent of a drawing in a Word document.
 //
 //	CX CY 's unit is English Metric Units, which is 1/914400 inch
@@ -1350,6 +1425,64 @@ func (r *WPAnchor) String() string {
 	return "![anch?](unknown)"
 }
 
+func (r *WPAnchor) copymedia(to *Docx) *WPAnchor {
+	if r.Graphic.GraphicData.Pic != nil {
+		if r.Graphic.GraphicData.Pic.BlipFill != nil {
+			tgt, err := r.file.ReferTarget(r.Graphic.GraphicData.Pic.BlipFill.Blip.Embed)
+			if err != nil {
+				return nil
+			}
+			format := tgt[strings.LastIndex(tgt, ".")+1:]
+			idn := int(atomic.AddUintptr(&to.docID, 1))
+			id := int(to.IncreaseID("图片"))
+			ids := strconv.Itoa(id)
+			m := r.file.Media(tgt[6:])
+			if m == nil {
+				return nil
+			}
+			rid := to.addImage(format, m.Data)
+			anch := *r
+			grph := *r.Graphic
+			anch.Graphic = &grph
+			grphdata := *r.Graphic.GraphicData
+			grph.GraphicData = &grphdata
+			pic := *r.Graphic.GraphicData.Pic
+			grphdata.Pic = &pic
+			grphdata.file = to
+			grph.file = to
+			anch.file = to
+
+			anch.DocPr = &WPDocPr{
+				ID:   idn,
+				Name: "图片 " + ids,
+			}
+			pic.NonVisualPicProperties = &PICNonVisualPicProperties{
+				NonVisualDrawingProperties: NonVisualProperties{
+					ID:   id,
+					Name: "图片 " + ids,
+				},
+				CNvPicPr: r.Graphic.GraphicData.Pic.NonVisualPicProperties.CNvPicPr,
+			}
+			pic.BlipFill = &PICBlipFill{
+				Blip: ABlip{
+					Embed:  rid,
+					Cstate: r.Graphic.GraphicData.Pic.BlipFill.Blip.Cstate,
+				},
+				Stretch: r.Graphic.GraphicData.Pic.BlipFill.Stretch,
+			}
+			return &anch
+		}
+		return nil
+	}
+	if r.Graphic.GraphicData.Shape != nil { // shape has no media
+		return r
+	}
+	if r.Graphic.GraphicData.Canvas != nil { //TODO: copy canvas media
+		return r
+	}
+	return nil
+}
+
 // WPSimplePos represents the position of an object in a Word document.
 type WPSimplePos struct {
 	XMLName xml.Name `xml:"wp:simplePos,omitempty"`

structtable.go

@@ -27,8 +27,8 @@ import (
 	"strings"
 )
 
-// WTable represents a table within a Word document.
-type WTable struct {
+// Table represents a table within a Word document.
+type Table struct {
 	XMLName         xml.Name `xml:"w:tbl,omitempty"`
 	TableProperties *WTableProperties
 	TableGrid       *WTableGrid
@@ -37,7 +37,7 @@ type WTable struct {
 	file *Docx
 }
 
-func (t *WTable) String() string {
+func (t *Table) String() string {
 	if len(t.TableRows) == 0 || len(t.TableRows[0].TableCells) == 0 {
 		return ""
 	}
@@ -62,7 +62,7 @@ func (t *WTable) String() string {
 }
 
 // UnmarshalXML implements the xml.Unmarshaler interface.
-func (t *WTable) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+func (t *Table) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
 	for {
 		token, err := d.Token()
 		if err == io.EOF {

unpack.go

@@ -22,7 +22,6 @@ package docx
 
 import (
 	"archive/zip"
-	"bytes"
 	"encoding/xml"
 	"io"
 	"strings"
@@ -67,7 +66,8 @@ func unpack(zipReader *zip.Reader) (docx *Docx, err error) {
 		// fill remaining files into tmpfslst
 		docx.tmpfslst = append(docx.tmpfslst, f.Name)
 	}
-	docx.buf = bytes.NewBuffer(make([]byte, 0, 1024*1024))
+	//TODO: find last imageID
+	docx.imageID = 100000
 	return
 }
 
@@ -94,6 +94,7 @@ func (f *Docx) parseDocument(file *zip.File) error {
 
 	f.Document.Body.file = f
 	//TODO: find last docID
+	f.docID = 100000
 	err = xml.NewDecoder(zf).Decode(&f.Document)
 	return err
 }
@@ -108,12 +109,12 @@ func (f *Docx) parseDocRelation(file *zip.File) error {
 
 	f.docRelation.Xmlns = XMLNS_R
 	//TODO: find last rID
+	f.rID = 100000
 	return xml.NewDecoder(zf).Decode(&f.docRelation)
 }
 
 // parseMedia add the media into Docx struct
 func (f *Docx) parseMedia(file *zip.File) error {
-	//TODO: find last imageID
 	name := file.Name[len(MEDIA_FOLDER):]
 	zf, err := file.Open()
 	if err != nil {