21
0
xls/col.go
Tamás Gulácsi 80a9dc03c7 Expand format recognition for dates
Read in and use DATEMODE (0x22), and recognize more formats as dates (both built-in and user-defined).
2015-11-25 14:50:29 +01:00

194 lines
3.3 KiB
Go

package xls
import (
"fmt"
"math"
"strconv"
"strings"
"time"
)
//content type
type contentHandler interface {
String(*WorkBook) []string
FirstCol() uint16
LastCol() uint16
}
type Col struct {
RowB uint16
FirstColB uint16
}
type Coler interface {
Row() uint16
}
func (c *Col) Row() uint16 {
return c.RowB
}
func (c *Col) FirstCol() uint16 {
return c.FirstColB
}
func (c *Col) LastCol() uint16 {
return c.FirstColB
}
func (c *Col) String(wb *WorkBook) []string {
return []string{"default"}
}
type XfRk struct {
Index uint16
Rk RK
}
func (xf *XfRk) String(wb *WorkBook) string {
idx := int(xf.Index)
if len(wb.Xfs) > idx {
fNo := wb.Xfs[idx].formatNo()
if fNo >= 164 { // user defined format
if fmt := wb.Formats[fNo]; fmt != nil && strings.Contains(fmt.str, "YY") {
i, f, isFloat := xf.Rk.number()
if !isFloat {
f = float64(i)
}
t := timeFromExcelTime(f, wb.dateMode == 1)
return t.Format(time.RFC3339) //TODO it should be international
}
// see http://www.openoffice.org/sc/excelfileformat.pdf
} else if 14 <= fNo && fNo <= 17 || fNo == 22 || fNo <= 27 && fNo <= 36 || fNo <= 50 && fNo <= 58 { // jp. date format
i, f, isFloat := xf.Rk.number()
if !isFloat {
f = float64(i)
}
t := timeFromExcelTime(f, wb.dateMode == 1)
return t.Format("2006.01") //TODO it should be international
}
}
return xf.Rk.String()
}
type RK uint32
func (rk RK) number() (intNum int64, floatNum float64, isFloat bool) {
multiplied := rk & 1
isInt := rk & 2
val := rk >> 2
if isInt == 0 {
isFloat = true
floatNum = math.Float64frombits(uint64(val) << 34)
if multiplied != 0 {
floatNum = floatNum / 100
}
return
}
return int64(val), 0, false
}
func (rk RK) String() string {
i, f, isFloat := rk.number()
if isFloat {
return fmt.Sprintf("%.1f", f)
}
return strconv.FormatInt(i, 10)
}
var ErrIsInt = fmt.Errorf("is int")
func (rk RK) Float() (float64, error) {
_, f, isFloat := rk.number()
if !isFloat {
return 0, ErrIsInt
}
return f, nil
}
type MulrkCol struct {
Col
Xfrks []XfRk
LastColB uint16
}
func (c *MulrkCol) LastCol() uint16 {
return c.LastColB
}
func (c *MulrkCol) String(wb *WorkBook) []string {
var res = make([]string, len(c.Xfrks))
for i := 0; i < len(c.Xfrks); i++ {
xfrk := c.Xfrks[i]
res[i] = xfrk.String(wb)
}
return res
}
type MulBlankCol struct {
Col
Xfs []uint16
LastColB uint16
}
func (c *MulBlankCol) LastCol() uint16 {
return c.LastColB
}
func (c *MulBlankCol) String(wb *WorkBook) []string {
return make([]string, len(c.Xfs))
}
type NumberCol struct {
Col
Index uint16
Float float64
}
func (c *NumberCol) String(wb *WorkBook) []string {
return []string{fmt.Sprintf("%f", c.Float)}
}
type FormulaCol struct {
Header struct {
Col
IndexXf uint16
Result [8]byte
Flags uint16
_ uint32
}
Bts []byte
}
func (c *FormulaCol) String(wb *WorkBook) []string {
return []string{"FormulaCol"}
}
type RkCol struct {
Col
Xfrk XfRk
}
func (c *RkCol) String(wb *WorkBook) []string {
return []string{c.Xfrk.String(wb)}
}
type LabelsstCol struct {
Col
Xf uint16
Sst uint32
}
func (c *LabelsstCol) String(wb *WorkBook) []string {
return []string{wb.sst[int(c.Sst)]}
}
type BlankCol struct {
Col
Xf uint16
}
func (c *BlankCol) String(wb *WorkBook) []string {
return []string{""}
}