mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-12-12 07:42:08 +01:00
319 lines
10 KiB
Go
319 lines
10 KiB
Go
package extension
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"regexp"
|
|
|
|
"github.com/yuin/goldmark"
|
|
gast "github.com/yuin/goldmark/ast"
|
|
"github.com/yuin/goldmark/extension/ast"
|
|
"github.com/yuin/goldmark/parser"
|
|
"github.com/yuin/goldmark/renderer"
|
|
"github.com/yuin/goldmark/renderer/html"
|
|
"github.com/yuin/goldmark/text"
|
|
"github.com/yuin/goldmark/util"
|
|
)
|
|
|
|
var tableDelimRegexp = regexp.MustCompile(`^[\s\-\|\:]+$`)
|
|
var tableDelimLeft = regexp.MustCompile(`^\s*\:\-+\s*$`)
|
|
var tableDelimRight = regexp.MustCompile(`^\s*\-+\:\s*$`)
|
|
var tableDelimCenter = regexp.MustCompile(`^\s*\:\-+\:\s*$`)
|
|
var tableDelimNone = regexp.MustCompile(`^\s*\-+\s*$`)
|
|
|
|
type tableParagraphTransformer struct {
|
|
}
|
|
|
|
var defaultTableParagraphTransformer = &tableParagraphTransformer{}
|
|
|
|
// NewTableParagraphTransformer returns a new ParagraphTransformer
|
|
// that can transform paragraphs into tables.
|
|
func NewTableParagraphTransformer() parser.ParagraphTransformer {
|
|
return defaultTableParagraphTransformer
|
|
}
|
|
|
|
func (b *tableParagraphTransformer) Transform(node *gast.Paragraph, reader text.Reader, pc parser.Context) {
|
|
lines := node.Lines()
|
|
if lines.Len() < 2 {
|
|
return
|
|
}
|
|
alignments := b.parseDelimiter(lines.At(1), reader)
|
|
if alignments == nil {
|
|
return
|
|
}
|
|
header := b.parseRow(lines.At(0), alignments, true, reader)
|
|
if header == nil || len(alignments) != header.ChildCount() {
|
|
return
|
|
}
|
|
table := ast.NewTable()
|
|
table.Alignments = alignments
|
|
table.AppendChild(table, ast.NewTableHeader(header))
|
|
for i := 2; i < lines.Len(); i++ {
|
|
table.AppendChild(table, b.parseRow(lines.At(i), alignments, false, reader))
|
|
}
|
|
node.Parent().InsertBefore(node.Parent(), node, table)
|
|
node.Parent().RemoveChild(node.Parent(), node)
|
|
}
|
|
|
|
func (b *tableParagraphTransformer) parseRow(segment text.Segment, alignments []ast.Alignment, isHeader bool, reader text.Reader) *ast.TableRow {
|
|
source := reader.Source()
|
|
line := segment.Value(source)
|
|
pos := 0
|
|
pos += util.TrimLeftSpaceLength(line)
|
|
limit := len(line)
|
|
limit -= util.TrimRightSpaceLength(line)
|
|
row := ast.NewTableRow(alignments)
|
|
if len(line) > 0 && line[pos] == '|' {
|
|
pos++
|
|
}
|
|
if len(line) > 0 && line[limit-1] == '|' {
|
|
limit--
|
|
}
|
|
i := 0
|
|
for ; pos < limit; i++ {
|
|
alignment := ast.AlignNone
|
|
if i >= len(alignments) {
|
|
if !isHeader {
|
|
return row
|
|
}
|
|
} else {
|
|
alignment = alignments[i]
|
|
}
|
|
closure := util.FindClosure(line[pos:], byte(0), '|', true, false)
|
|
if closure < 0 {
|
|
closure = len(line[pos:])
|
|
}
|
|
node := ast.NewTableCell()
|
|
seg := text.NewSegment(segment.Start+pos, segment.Start+pos+closure)
|
|
seg = seg.TrimLeftSpace(source)
|
|
seg = seg.TrimRightSpace(source)
|
|
node.Lines().Append(seg)
|
|
node.Alignment = alignment
|
|
row.AppendChild(row, node)
|
|
pos += closure + 1
|
|
}
|
|
for ; i < len(alignments); i++ {
|
|
row.AppendChild(row, ast.NewTableCell())
|
|
}
|
|
return row
|
|
}
|
|
|
|
func (b *tableParagraphTransformer) parseDelimiter(segment text.Segment, reader text.Reader) []ast.Alignment {
|
|
line := segment.Value(reader.Source())
|
|
if !tableDelimRegexp.Match(line) {
|
|
return nil
|
|
}
|
|
cols := bytes.Split(line, []byte{'|'})
|
|
if util.IsBlank(cols[0]) {
|
|
cols = cols[1:]
|
|
}
|
|
if len(cols) > 0 && util.IsBlank(cols[len(cols)-1]) {
|
|
cols = cols[:len(cols)-1]
|
|
}
|
|
|
|
var alignments []ast.Alignment
|
|
for _, col := range cols {
|
|
if tableDelimLeft.Match(col) {
|
|
alignments = append(alignments, ast.AlignLeft)
|
|
} else if tableDelimRight.Match(col) {
|
|
alignments = append(alignments, ast.AlignRight)
|
|
} else if tableDelimCenter.Match(col) {
|
|
alignments = append(alignments, ast.AlignCenter)
|
|
} else if tableDelimNone.Match(col) {
|
|
alignments = append(alignments, ast.AlignNone)
|
|
} else {
|
|
return nil
|
|
}
|
|
}
|
|
return alignments
|
|
}
|
|
|
|
// TableHTMLRenderer is a renderer.NodeRenderer implementation that
|
|
// renders Table nodes.
|
|
type TableHTMLRenderer struct {
|
|
html.Config
|
|
}
|
|
|
|
// NewTableHTMLRenderer returns a new TableHTMLRenderer.
|
|
func NewTableHTMLRenderer(opts ...html.Option) renderer.NodeRenderer {
|
|
r := &TableHTMLRenderer{
|
|
Config: html.NewConfig(),
|
|
}
|
|
for _, opt := range opts {
|
|
opt.SetHTMLOption(&r.Config)
|
|
}
|
|
return r
|
|
}
|
|
|
|
// RegisterFuncs implements renderer.NodeRenderer.RegisterFuncs.
|
|
func (r *TableHTMLRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
|
|
reg.Register(ast.KindTable, r.renderTable)
|
|
reg.Register(ast.KindTableHeader, r.renderTableHeader)
|
|
reg.Register(ast.KindTableRow, r.renderTableRow)
|
|
reg.Register(ast.KindTableCell, r.renderTableCell)
|
|
}
|
|
|
|
// TableAttributeFilter defines attribute names which table elements can have.
|
|
var TableAttributeFilter = html.GlobalAttributeFilter.Extend(
|
|
[]byte("align"), // [Deprecated]
|
|
[]byte("bgcolor"), // [Deprecated]
|
|
[]byte("border"), // [Deprecated]
|
|
[]byte("cellpadding"), // [Deprecated]
|
|
[]byte("cellspacing"), // [Deprecated]
|
|
[]byte("frame"), // [Deprecated]
|
|
[]byte("rules"), // [Deprecated]
|
|
[]byte("summary"), // [Deprecated]
|
|
[]byte("width"), // [Deprecated]
|
|
)
|
|
|
|
func (r *TableHTMLRenderer) renderTable(w util.BufWriter, source []byte, n gast.Node, entering bool) (gast.WalkStatus, error) {
|
|
if entering {
|
|
_, _ = w.WriteString("<table")
|
|
if n.Attributes() != nil {
|
|
html.RenderAttributes(w, n, TableAttributeFilter)
|
|
}
|
|
_, _ = w.WriteString(">\n")
|
|
} else {
|
|
_, _ = w.WriteString("</table>\n")
|
|
}
|
|
return gast.WalkContinue, nil
|
|
}
|
|
|
|
// TableHeaderAttributeFilter defines attribute names which <thead> elements can have.
|
|
var TableHeaderAttributeFilter = html.GlobalAttributeFilter.Extend(
|
|
[]byte("align"), // [Deprecated since HTML4] [Obsolete since HTML5]
|
|
[]byte("bgcolor"), // [Not Standardized]
|
|
[]byte("char"), // [Deprecated since HTML4] [Obsolete since HTML5]
|
|
[]byte("charoff"), // [Deprecated since HTML4] [Obsolete since HTML5]
|
|
[]byte("valign"), // [Deprecated since HTML4] [Obsolete since HTML5]
|
|
)
|
|
|
|
func (r *TableHTMLRenderer) renderTableHeader(w util.BufWriter, source []byte, n gast.Node, entering bool) (gast.WalkStatus, error) {
|
|
if entering {
|
|
_, _ = w.WriteString("<thead")
|
|
if n.Attributes() != nil {
|
|
html.RenderAttributes(w, n, TableHeaderAttributeFilter)
|
|
}
|
|
_, _ = w.WriteString(">\n")
|
|
_, _ = w.WriteString("<tr>\n") // Header <tr> has no separate handle
|
|
} else {
|
|
_, _ = w.WriteString("</tr>\n")
|
|
_, _ = w.WriteString("</thead>\n")
|
|
if n.NextSibling() != nil {
|
|
_, _ = w.WriteString("<tbody>\n")
|
|
}
|
|
}
|
|
return gast.WalkContinue, nil
|
|
}
|
|
|
|
// TableRowAttributeFilter defines attribute names which <tr> elements can have.
|
|
var TableRowAttributeFilter = html.GlobalAttributeFilter.Extend(
|
|
[]byte("align"), // [Obsolete since HTML5]
|
|
[]byte("bgcolor"), // [Obsolete since HTML5]
|
|
[]byte("char"), // [Obsolete since HTML5]
|
|
[]byte("charoff"), // [Obsolete since HTML5]
|
|
[]byte("valign"), // [Obsolete since HTML5]
|
|
)
|
|
|
|
func (r *TableHTMLRenderer) renderTableRow(w util.BufWriter, source []byte, n gast.Node, entering bool) (gast.WalkStatus, error) {
|
|
if entering {
|
|
_, _ = w.WriteString("<tr")
|
|
if n.Attributes() != nil {
|
|
html.RenderAttributes(w, n, TableRowAttributeFilter)
|
|
}
|
|
_, _ = w.WriteString(">\n")
|
|
} else {
|
|
_, _ = w.WriteString("</tr>\n")
|
|
if n.Parent().LastChild() == n {
|
|
_, _ = w.WriteString("</tbody>\n")
|
|
}
|
|
}
|
|
return gast.WalkContinue, nil
|
|
}
|
|
|
|
// TableThCellAttributeFilter defines attribute names which table <th> cells can have.
|
|
var TableThCellAttributeFilter = html.GlobalAttributeFilter.Extend(
|
|
[]byte("abbr"), // [OK] Contains a short abbreviated description of the cell's content [NOT OK in <td>]
|
|
|
|
[]byte("align"), // [Obsolete since HTML5]
|
|
[]byte("axis"), // [Obsolete since HTML5]
|
|
[]byte("bgcolor"), // [Not Standardized]
|
|
[]byte("char"), // [Obsolete since HTML5]
|
|
[]byte("charoff"), // [Obsolete since HTML5]
|
|
|
|
[]byte("colspan"), // [OK] Number of columns that the cell is to span
|
|
[]byte("headers"), // [OK] This attribute contains a list of space-separated strings, each corresponding to the id attribute of the <th> elements that apply to this element
|
|
|
|
[]byte("height"), // [Deprecated since HTML4] [Obsolete since HTML5]
|
|
|
|
[]byte("rowspan"), // [OK] Number of rows that the cell is to span
|
|
[]byte("scope"), // [OK] This enumerated attribute defines the cells that the header (defined in the <th>) element relates to [NOT OK in <td>]
|
|
|
|
[]byte("valign"), // [Obsolete since HTML5]
|
|
[]byte("width"), // [Deprecated since HTML4] [Obsolete since HTML5]
|
|
)
|
|
|
|
// TableTdCellAttributeFilter defines attribute names which table <td> cells can have.
|
|
var TableTdCellAttributeFilter = html.GlobalAttributeFilter.Extend(
|
|
[]byte("abbr"), // [Obsolete since HTML5] [OK in <th>]
|
|
[]byte("align"), // [Obsolete since HTML5]
|
|
[]byte("axis"), // [Obsolete since HTML5]
|
|
[]byte("bgcolor"), // [Not Standardized]
|
|
[]byte("char"), // [Obsolete since HTML5]
|
|
[]byte("charoff"), // [Obsolete since HTML5]
|
|
|
|
[]byte("colspan"), // [OK] Number of columns that the cell is to span
|
|
[]byte("headers"), // [OK] This attribute contains a list of space-separated strings, each corresponding to the id attribute of the <th> elements that apply to this element
|
|
|
|
[]byte("height"), // [Deprecated since HTML4] [Obsolete since HTML5]
|
|
|
|
[]byte("rowspan"), // [OK] Number of rows that the cell is to span
|
|
|
|
[]byte("scope"), // [Obsolete since HTML5] [OK in <th>]
|
|
[]byte("valign"), // [Obsolete since HTML5]
|
|
[]byte("width"), // [Deprecated since HTML4] [Obsolete since HTML5]
|
|
)
|
|
|
|
func (r *TableHTMLRenderer) renderTableCell(w util.BufWriter, source []byte, node gast.Node, entering bool) (gast.WalkStatus, error) {
|
|
n := node.(*ast.TableCell)
|
|
tag := "td"
|
|
if n.Parent().Kind() == ast.KindTableHeader {
|
|
tag = "th"
|
|
}
|
|
if entering {
|
|
align := ""
|
|
if n.Alignment != ast.AlignNone {
|
|
if _, ok := n.AttributeString("align"); !ok { // Skip align render if overridden
|
|
// TODO: "align" is deprecated. style="text-align:%s" instead?
|
|
align = fmt.Sprintf(` align="%s"`, n.Alignment.String())
|
|
}
|
|
}
|
|
fmt.Fprintf(w, "<%s", tag)
|
|
if n.Attributes() != nil {
|
|
if tag == "td" {
|
|
html.RenderAttributes(w, n, TableTdCellAttributeFilter) // <td>
|
|
} else {
|
|
html.RenderAttributes(w, n, TableThCellAttributeFilter) // <th>
|
|
}
|
|
}
|
|
fmt.Fprintf(w, "%s>", align)
|
|
} else {
|
|
fmt.Fprintf(w, "</%s>\n", tag)
|
|
}
|
|
return gast.WalkContinue, nil
|
|
}
|
|
|
|
type table struct {
|
|
}
|
|
|
|
// Table is an extension that allow you to use GFM tables .
|
|
var Table = &table{}
|
|
|
|
func (e *table) Extend(m goldmark.Markdown) {
|
|
m.Parser().AddOptions(parser.WithParagraphTransformers(
|
|
util.Prioritized(NewTableParagraphTransformer(), 200),
|
|
))
|
|
m.Renderer().AddOptions(renderer.WithNodeRenderers(
|
|
util.Prioritized(NewTableHTMLRenderer(), 500),
|
|
))
|
|
}
|