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table.go
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table.go
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package html
import (
"fmt"
"io"
)
const (
defaultBackground = "white"
defaultForeground = "black"
headingBackground = "#f0f0f0"
highlightBackground = "#fafafa"
)
func newTableWriter(writer io.Writer, doHighlighting bool,
columns []string) (*TableWriter, error) {
if len(columns) > 0 {
if doHighlighting {
fmt.Fprintf(writer, " <tr style=\"background-color:%s\">\n",
headingBackground)
} else {
fmt.Fprintln(writer, " <tr>")
}
}
for _, column := range columns {
fmt.Fprintf(writer, " <th>%s</th>\n", column)
}
fmt.Fprintln(writer, " </tr>")
return &TableWriter{
doHighlighting: doHighlighting,
writer: writer,
}, nil
}
func (tw *TableWriter) closeRow() error {
_, err := fmt.Fprintln(tw.writer, " </tr>")
return err
}
func (tw *TableWriter) openRow(foreground, background string) error {
if foreground == "" {
foreground = defaultForeground
}
if background == "" {
background = defaultBackground
}
if background == defaultBackground &&
tw.lastBackground == defaultBackground {
background = highlightBackground
}
var err error
if background == defaultBackground {
if foreground == defaultForeground {
_, err = fmt.Fprintln(tw.writer, " <tr>")
} else {
_, err = fmt.Fprintf(tw.writer, " <tr style=\"color:%s\">\n",
foreground)
}
} else {
if foreground == defaultForeground {
_, err = fmt.Fprintf(tw.writer,
" <tr style=\"background-color:%s\">\n", background)
} else {
_, err = fmt.Fprintf(tw.writer,
" <tr style=\"background-color:%s;color:%s\">\n",
background, foreground)
}
}
tw.lastBackground = background
return err
}
func (tw *TableWriter) writeData(foreground, data string) error {
if foreground == "" {
foreground = defaultForeground
}
var err error
if foreground == defaultForeground {
_, err = fmt.Fprintf(tw.writer, " <td>%s</td>\n", data)
} else {
_, err = fmt.Fprintf(tw.writer,
" <td><font color=\"%s\">%s</font></td>\n",
foreground, data)
}
return err
}
func (tw *TableWriter) writeRow(foreground, background string,
columns []string) error {
if err := tw.OpenRow(foreground, background); err != nil {
return err
}
for _, column := range columns {
fmt.Fprintf(tw.writer, " <td>%s</td>\n", column)
}
return tw.CloseRow()
}