picture.go 17.3 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532
// Copyright 2016 - 2019 The excelize Authors. All rights reserved. Use of
// this source code is governed by a BSD-style license that can be found in
// the LICENSE file.
//
// Package excelize providing a set of functions that allow you to write to
// and read from XLSX files. Support reads and writes XLSX file generated by
// Microsoft Excel™ 2007 and later. Support save file without losing original
// charts of XLSX. This library needs Go version 1.10 or later.

package excelize

import (
	"bytes"
	"encoding/json"
	"encoding/xml"
	"errors"
	"image"
	"io/ioutil"
	"os"
	"path"
	"path/filepath"
	"strconv"
	"strings"
)

// parseFormatPictureSet provides a function to parse the format settings of
// the picture with default value.
func parseFormatPictureSet(formatSet string) (*formatPicture, error) {
	format := formatPicture{
		FPrintsWithSheet: true,
		FLocksWithSheet:  false,
		NoChangeAspect:   false,
		OffsetX:          0,
		OffsetY:          0,
		XScale:           1.0,
		YScale:           1.0,
	}
	err := json.Unmarshal(parseFormatSet(formatSet), &format)
	return &format, err
}

// AddPicture provides the method to add picture in a sheet by given picture
// format set (such as offset, scale, aspect ratio setting and print settings)
// and file path. For example:
//
//    package main
//
//    import (
//        "fmt"
//        _ "image/gif"
//        _ "image/jpeg"
//        _ "image/png"
//
//        "github.com/360EntSecGroup-Skylar/excelize"
//    )
//
//    func main() {
//        f := excelize.NewFile()
//        // Insert a picture.
//        err := f.AddPicture("Sheet1", "A2", "./image1.jpg", "")
//        if err != nil {
//            fmt.Println(err)
//        }
//        // Insert a picture scaling in the cell with location hyperlink.
//        err = f.AddPicture("Sheet1", "D2", "./image1.png", `{"x_scale": 0.5, "y_scale": 0.5, "hyperlink": "#Sheet2!D8", "hyperlink_type": "Location"}`)
//        if err != nil {
//            fmt.Println(err)
//        }
//        // Insert a picture offset in the cell with external hyperlink, printing and positioning support.
//        err = f.AddPicture("Sheet1", "H2", "./image3.gif", `{"x_offset": 15, "y_offset": 10, "hyperlink": "https://github.com/360EntSecGroup-Skylar/excelize", "hyperlink_type": "External", "print_obj": true, "lock_aspect_ratio": false, "locked": false, "positioning": "oneCell"}`)
//        if err != nil {
//            fmt.Println(err)
//        }
//        err = f.SaveAs("./Book1.xlsx")
//        if err != nil {
//            fmt.Println(err)
//        }
//    }
//
// LinkType defines two types of hyperlink "External" for web site or
// "Location" for moving to one of cell in this workbook. When the
// "hyperlink_type" is "Location", coordinates need to start with "#".
//
// Positioning defines two types of the position of a picture in an Excel
// spreadsheet, "oneCell" (Move but don't size with cells) or "absolute"
// (Don't move or size with cells). If you don't set this parameter, default
// positioning is move and size with cells.
func (f *File) AddPicture(sheet, cell, picture, format string) error {
	var err error
	// Check picture exists first.
	if _, err = os.Stat(picture); os.IsNotExist(err) {
		return err
	}
	ext, ok := supportImageTypes[path.Ext(picture)]
	if !ok {
		return errors.New("unsupported image extension")
	}
	file, _ := ioutil.ReadFile(picture)
	_, name := filepath.Split(picture)
	return f.AddPictureFromBytes(sheet, cell, format, name, ext, file)
}

// AddPictureFromBytes provides the method to add picture in a sheet by given
// picture format set (such as offset, scale, aspect ratio setting and print
// settings), file base name, extension name and file bytes. For example:
//
//    package main
//
//    import (
//        "fmt"
//        _ "image/jpeg"
//        "io/ioutil"
//
//        "github.com/360EntSecGroup-Skylar/excelize"
//    )
//
//    func main() {
//        f := excelize.NewFile()
//
//        file, err := ioutil.ReadFile("./image1.jpg")
//        if err != nil {
//            fmt.Println(err)
//        }
//        err = f.AddPictureFromBytes("Sheet1", "A2", "", "Excel Logo", ".jpg", file)
//        if err != nil {
//            fmt.Println(err)
//        }
//        err = f.SaveAs("./Book1.xlsx")
//        if err != nil {
//            fmt.Println(err)
//        }
//    }
//
func (f *File) AddPictureFromBytes(sheet, cell, format, name, extension string, file []byte) error {
	var drawingHyperlinkRID int
	var hyperlinkType string
	ext, ok := supportImageTypes[extension]
	if !ok {
		return errors.New("unsupported image extension")
	}
	formatSet, err := parseFormatPictureSet(format)
	if err != nil {
		return err
	}
	img, _, err := image.DecodeConfig(bytes.NewReader(file))
	if err != nil {
		return err
	}
	// Read sheet data.
	xlsx, err := f.workSheetReader(sheet)
	if err != nil {
		return err
	}
	// Add first picture for given sheet, create xl/drawings/ and xl/drawings/_rels/ folder.
	drawingID := f.countDrawings() + 1
	drawingXML := "xl/drawings/drawing" + strconv.Itoa(drawingID) + ".xml"
	drawingID, drawingXML = f.prepareDrawing(xlsx, drawingID, sheet, drawingXML)
	drawingRels := "xl/drawings/_rels/drawing" + strconv.Itoa(drawingID) + ".xml.rels"
	mediaStr := ".." + strings.TrimPrefix(f.addMedia(file, ext), "xl")
	drawingRID := f.addRels(drawingRels, SourceRelationshipImage, mediaStr, hyperlinkType)
	// Add picture with hyperlink.
	if formatSet.Hyperlink != "" && formatSet.HyperlinkType != "" {
		if formatSet.HyperlinkType == "External" {
			hyperlinkType = formatSet.HyperlinkType
		}
		drawingHyperlinkRID = f.addRels(drawingRels, SourceRelationshipHyperLink, formatSet.Hyperlink, hyperlinkType)
	}
	err = f.addDrawingPicture(sheet, drawingXML, cell, name, img.Width, img.Height, drawingRID, drawingHyperlinkRID, formatSet)
	if err != nil {
		return err
	}
	f.addContentTypePart(drawingID, "drawings")
	return err
}

// deleteSheetRelationships provides a function to delete relationships in
// xl/worksheets/_rels/sheet%d.xml.rels by given worksheet name and
// relationship index.
func (f *File) deleteSheetRelationships(sheet, rID string) {
	name, ok := f.sheetMap[trimSheetName(sheet)]
	if !ok {
		name = strings.ToLower(sheet) + ".xml"
	}
	var rels = "xl/worksheets/_rels/" + strings.TrimPrefix(name, "xl/worksheets/") + ".rels"
	sheetRels := f.relsReader(rels)
	if sheetRels == nil {
		sheetRels = &xlsxRelationships{}
	}
	for k, v := range sheetRels.Relationships {
		if v.ID == rID {
			sheetRels.Relationships = append(sheetRels.Relationships[:k], sheetRels.Relationships[k+1:]...)
		}
	}
	f.Relationships[rels] = sheetRels
}

// addSheetLegacyDrawing provides a function to add legacy drawing element to
// xl/worksheets/sheet%d.xml by given worksheet name and relationship index.
func (f *File) addSheetLegacyDrawing(sheet string, rID int) {
	xlsx, _ := f.workSheetReader(sheet)
	xlsx.LegacyDrawing = &xlsxLegacyDrawing{
		RID: "rId" + strconv.Itoa(rID),
	}
}

// addSheetDrawing provides a function to add drawing element to
// xl/worksheets/sheet%d.xml by given worksheet name and relationship index.
func (f *File) addSheetDrawing(sheet string, rID int) {
	xlsx, _ := f.workSheetReader(sheet)
	xlsx.Drawing = &xlsxDrawing{
		RID: "rId" + strconv.Itoa(rID),
	}
}

// addSheetPicture provides a function to add picture element to
// xl/worksheets/sheet%d.xml by given worksheet name and relationship index.
func (f *File) addSheetPicture(sheet string, rID int) {
	xlsx, _ := f.workSheetReader(sheet)
	xlsx.Picture = &xlsxPicture{
		RID: "rId" + strconv.Itoa(rID),
	}
}

// countDrawings provides a function to get drawing files count storage in the
// folder xl/drawings.
func (f *File) countDrawings() int {
	c1, c2 := 0, 0
	for k := range f.XLSX {
		if strings.Contains(k, "xl/drawings/drawing") {
			c1++
		}
	}
	for rel := range f.Drawings {
		if strings.Contains(rel, "xl/drawings/drawing") {
			c2++
		}
	}
	if c1 < c2 {
		return c2
	}
	return c1
}

// addDrawingPicture provides a function to add picture by given sheet,
// drawingXML, cell, file name, width, height relationship index and format
// sets.
func (f *File) addDrawingPicture(sheet, drawingXML, cell, file string, width, height, rID, hyperlinkRID int, formatSet *formatPicture) error {
	col, row, err := CellNameToCoordinates(cell)
	if err != nil {
		return err
	}
	width = int(float64(width) * formatSet.XScale)
	height = int(float64(height) * formatSet.YScale)
	col--
	row--
	colStart, rowStart, _, _, colEnd, rowEnd, x2, y2 :=
		f.positionObjectPixels(sheet, col, row, formatSet.OffsetX, formatSet.OffsetY, width, height)
	content, cNvPrID := f.drawingParser(drawingXML)
	twoCellAnchor := xdrCellAnchor{}
	twoCellAnchor.EditAs = formatSet.Positioning
	from := xlsxFrom{}
	from.Col = colStart
	from.ColOff = formatSet.OffsetX * EMU
	from.Row = rowStart
	from.RowOff = formatSet.OffsetY * EMU
	to := xlsxTo{}
	to.Col = colEnd
	to.ColOff = x2 * EMU
	to.Row = rowEnd
	to.RowOff = y2 * EMU
	twoCellAnchor.From = &from
	twoCellAnchor.To = &to
	pic := xlsxPic{}
	pic.NvPicPr.CNvPicPr.PicLocks.NoChangeAspect = formatSet.NoChangeAspect
	pic.NvPicPr.CNvPr.ID = cNvPrID
	pic.NvPicPr.CNvPr.Descr = file
	pic.NvPicPr.CNvPr.Name = "Picture " + strconv.Itoa(cNvPrID)
	if hyperlinkRID != 0 {
		pic.NvPicPr.CNvPr.HlinkClick = &xlsxHlinkClick{
			R:   SourceRelationship,
			RID: "rId" + strconv.Itoa(hyperlinkRID),
		}
	}
	pic.BlipFill.Blip.R = SourceRelationship
	pic.BlipFill.Blip.Embed = "rId" + strconv.Itoa(rID)
	pic.SpPr.PrstGeom.Prst = "rect"

	twoCellAnchor.Pic = &pic
	twoCellAnchor.ClientData = &xdrClientData{
		FLocksWithSheet:  formatSet.FLocksWithSheet,
		FPrintsWithSheet: formatSet.FPrintsWithSheet,
	}
	content.TwoCellAnchor = append(content.TwoCellAnchor, &twoCellAnchor)
	f.Drawings[drawingXML] = content
	return err
}

// countMedia provides a function to get media files count storage in the
// folder xl/media/image.
func (f *File) countMedia() int {
	count := 0
	for k := range f.XLSX {
		if strings.Contains(k, "xl/media/image") {
			count++
		}
	}
	return count
}

// addMedia provides a function to add a picture into folder xl/media/image by
// given file and extension name. Duplicate images are only actually stored once
// and drawings that use it will reference the same image.
func (f *File) addMedia(file []byte, ext string) string {
	count := f.countMedia()
	for name, existing := range f.XLSX {
		if !strings.HasPrefix(name, "xl/media/image") {
			continue
		}
		if bytes.Equal(file, existing) {
			return name
		}
	}
	media := "xl/media/image" + strconv.Itoa(count+1) + ext
	f.XLSX[media] = file
	return media
}

// setContentTypePartImageExtensions provides a function to set the content
// type for relationship parts and the Main Document part.
func (f *File) setContentTypePartImageExtensions() {
	var imageTypes = map[string]bool{"jpeg": false, "png": false, "gif": false, "tiff": false}
	content := f.contentTypesReader()
	for _, v := range content.Defaults {
		_, ok := imageTypes[v.Extension]
		if ok {
			imageTypes[v.Extension] = true
		}
	}
	for k, v := range imageTypes {
		if !v {
			content.Defaults = append(content.Defaults, xlsxDefault{
				Extension:   k,
				ContentType: "image/" + k,
			})
		}
	}
}

// setContentTypePartVMLExtensions provides a function to set the content type
// for relationship parts and the Main Document part.
func (f *File) setContentTypePartVMLExtensions() {
	vml := false
	content := f.contentTypesReader()
	for _, v := range content.Defaults {
		if v.Extension == "vml" {
			vml = true
		}
	}
	if !vml {
		content.Defaults = append(content.Defaults, xlsxDefault{
			Extension:   "vml",
			ContentType: "application/vnd.openxmlformats-officedocument.vmlDrawing",
		})
	}
}

// addContentTypePart provides a function to add content type part
// relationships in the file [Content_Types].xml by given index.
func (f *File) addContentTypePart(index int, contentType string) {
	setContentType := map[string]func(){
		"comments": f.setContentTypePartVMLExtensions,
		"drawings": f.setContentTypePartImageExtensions,
	}
	partNames := map[string]string{
		"chart":      "/xl/charts/chart" + strconv.Itoa(index) + ".xml",
		"comments":   "/xl/comments" + strconv.Itoa(index) + ".xml",
		"drawings":   "/xl/drawings/drawing" + strconv.Itoa(index) + ".xml",
		"table":      "/xl/tables/table" + strconv.Itoa(index) + ".xml",
		"pivotTable": "/xl/pivotTables/pivotTable" + strconv.Itoa(index) + ".xml",
		"pivotCache": "/xl/pivotCache/pivotCacheDefinition" + strconv.Itoa(index) + ".xml",
	}
	contentTypes := map[string]string{
		"chart":      "application/vnd.openxmlformats-officedocument.drawingml.chart+xml",
		"comments":   "application/vnd.openxmlformats-officedocument.spreadsheetml.comments+xml",
		"drawings":   "application/vnd.openxmlformats-officedocument.drawing+xml",
		"table":      "application/vnd.openxmlformats-officedocument.spreadsheetml.table+xml",
		"pivotTable": "application/vnd.openxmlformats-officedocument.spreadsheetml.pivotTable+xml",
		"pivotCache": "application/vnd.openxmlformats-officedocument.spreadsheetml.pivotCacheDefinition+xml",
	}
	s, ok := setContentType[contentType]
	if ok {
		s()
	}
	content := f.contentTypesReader()
	for _, v := range content.Overrides {
		if v.PartName == partNames[contentType] {
			return
		}
	}
	content.Overrides = append(content.Overrides, xlsxOverride{
		PartName:    partNames[contentType],
		ContentType: contentTypes[contentType],
	})
}

// getSheetRelationshipsTargetByID provides a function to get Target attribute
// value in xl/worksheets/_rels/sheet%d.xml.rels by given worksheet name and
// relationship index.
func (f *File) getSheetRelationshipsTargetByID(sheet, rID string) string {
	name, ok := f.sheetMap[trimSheetName(sheet)]
	if !ok {
		name = strings.ToLower(sheet) + ".xml"
	}
	var rels = "xl/worksheets/_rels/" + strings.TrimPrefix(name, "xl/worksheets/") + ".rels"
	sheetRels := f.relsReader(rels)
	if sheetRels == nil {
		sheetRels = &xlsxRelationships{}
	}
	for _, v := range sheetRels.Relationships {
		if v.ID == rID {
			return v.Target
		}
	}
	return ""
}

// GetPicture provides a function to get picture base name and raw content
// embed in XLSX by given worksheet and cell name. This function returns the
// file name in XLSX and file contents as []byte data types. For example:
//
//    f, err := excelize.OpenFile("./Book1.xlsx")
//    if err != nil {
//        fmt.Println(err)
//        return
//    }
//    file, raw, err := f.GetPicture("Sheet1", "A2")
//    if err != nil {
//        fmt.Println(err)
//        return
//    }
//    err = ioutil.WriteFile(file, raw, 0644)
//    if err != nil {
//        fmt.Println(err)
//    }
//
func (f *File) GetPicture(sheet, cell string) (string, []byte, error) {
	col, row, err := CellNameToCoordinates(cell)
	if err != nil {
		return "", nil, err
	}
	col--
	row--
	xlsx, err := f.workSheetReader(sheet)
	if err != nil {
		return "", nil, err
	}
	if xlsx.Drawing == nil {
		return "", nil, err
	}
	target := f.getSheetRelationshipsTargetByID(sheet, xlsx.Drawing.RID)
	drawingXML := strings.Replace(target, "..", "xl", -1)
	_, ok := f.XLSX[drawingXML]
	if !ok {
		return "", nil, err
	}
	drawingRelationships := strings.Replace(
		strings.Replace(target, "../drawings", "xl/drawings/_rels", -1), ".xml", ".xml.rels", -1)

	return f.getPicture(row, col, drawingXML, drawingRelationships)
}

// getPicture provides a function to get picture base name and raw content
// embed in XLSX by given coordinates and drawing relationships.
func (f *File) getPicture(row, col int, drawingXML, drawingRelationships string) (string, []byte, error) {
	wsDr, _ := f.drawingParser(drawingXML)
	for _, anchor := range wsDr.TwoCellAnchor {
		if anchor.From != nil && anchor.Pic != nil {
			if anchor.From.Col == col && anchor.From.Row == row {
				xlsxRelationship := f.getDrawingRelationships(drawingRelationships,
					anchor.Pic.BlipFill.Blip.Embed)
				_, ok := supportImageTypes[filepath.Ext(xlsxRelationship.Target)]
				if ok {
					return filepath.Base(xlsxRelationship.Target),
						[]byte(f.XLSX[strings.Replace(xlsxRelationship.Target,
							"..", "xl", -1)]), nil
				}
			}
		}
	}

	decodeWsDr := decodeWsDr{}
	_ = xml.Unmarshal(namespaceStrictToTransitional(f.readXML(drawingXML)), &decodeWsDr)
	for _, anchor := range decodeWsDr.TwoCellAnchor {
		decodeTwoCellAnchor := decodeTwoCellAnchor{}
		_ = xml.Unmarshal([]byte("<decodeTwoCellAnchor>"+anchor.Content+"</decodeTwoCellAnchor>"), &decodeTwoCellAnchor)
		if decodeTwoCellAnchor.From != nil && decodeTwoCellAnchor.Pic != nil {
			if decodeTwoCellAnchor.From.Col == col && decodeTwoCellAnchor.From.Row == row {
				xlsxRelationship := f.getDrawingRelationships(drawingRelationships, decodeTwoCellAnchor.Pic.BlipFill.Blip.Embed)
				_, ok := supportImageTypes[filepath.Ext(xlsxRelationship.Target)]
				if ok {
					return filepath.Base(xlsxRelationship.Target), []byte(f.XLSX[strings.Replace(xlsxRelationship.Target, "..", "xl", -1)]), nil
				}
			}
		}
	}
	return "", nil, nil
}

// getDrawingRelationships provides a function to get drawing relationships
// from xl/drawings/_rels/drawing%s.xml.rels by given file name and
// relationship ID.
func (f *File) getDrawingRelationships(rels, rID string) *xlsxRelationship {
	if drawingRels := f.relsReader(rels); drawingRels != nil {
		for _, v := range drawingRels.Relationships {
			if v.ID == rID {
				return &v
			}
		}
	}
	return nil
}

// drawingsWriter provides a function to save xl/drawings/drawing%d.xml after
// serialize structure.
func (f *File) drawingsWriter() {
	for path, d := range f.Drawings {
		if d != nil {
			v, _ := xml.Marshal(d)
			f.saveFileList(path, v)
		}
	}
}