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https://github.com/cwinfo/matterbridge.git
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Update dependencies (#1610)
* Update dependencies * Update module to go 1.17
This commit is contained in:
Wim
311
vendor/github.com/gomarkdown/markdown/parser/block_table.go
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vendored
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311
vendor/github.com/gomarkdown/markdown/parser/block_table.go
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@@ -0,0 +1,311 @@
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package parser
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import "github.com/gomarkdown/markdown/ast"
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// check if the specified position is preceded by an odd number of backslashes
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func isBackslashEscaped(data []byte, i int) bool {
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backslashes := 0
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for i-backslashes-1 >= 0 && data[i-backslashes-1] == '\\' {
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backslashes++
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}
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return backslashes&1 == 1
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}
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func (p *Parser) tableRow(data []byte, columns []ast.CellAlignFlags, header bool) {
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p.addBlock(&ast.TableRow{})
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col := 0
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i := skipChar(data, 0, '|')
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n := len(data)
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colspans := 0 // keep track of total colspan in this row.
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for col = 0; col < len(columns) && i < n; col++ {
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colspan := 0
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i = skipChar(data, i, ' ')
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cellStart := i
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for i < n && (data[i] != '|' || isBackslashEscaped(data, i)) && data[i] != '\n' {
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i++
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}
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cellEnd := i
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// skip the end-of-cell marker, possibly taking us past end of buffer
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// each _extra_ | means a colspan
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for i < len(data) && data[i] == '|' && !isBackslashEscaped(data, i) {
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i++
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colspan++
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}
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// only colspan > 1 make sense.
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if colspan < 2 {
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colspan = 0
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}
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for cellEnd > cellStart && cellEnd-1 < n && data[cellEnd-1] == ' ' {
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cellEnd--
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}
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block := &ast.TableCell{
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IsHeader: header,
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Align: columns[col],
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ColSpan: colspan,
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}
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block.Content = data[cellStart:cellEnd]
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if cellStart == cellEnd && colspans > 0 {
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// an empty cell that we should ignore, it exists because of colspan
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colspans--
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} else {
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p.addBlock(block)
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}
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if colspan > 0 {
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colspans += colspan - 1
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}
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}
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// pad it out with empty columns to get the right number
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for ; col < len(columns); col++ {
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block := &ast.TableCell{
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IsHeader: header,
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Align: columns[col],
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}
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p.addBlock(block)
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}
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// silently ignore rows with too many cells
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}
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// tableFooter parses the (optional) table footer.
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func (p *Parser) tableFooter(data []byte) bool {
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colCount := 1
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// ignore up to 3 spaces
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n := len(data)
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i := skipCharN(data, 0, ' ', 3)
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for ; i < n && data[i] != '\n'; i++ {
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if data[i] == '|' && !isBackslashEscaped(data, i) {
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colCount++
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continue
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}
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// remaining data must be the = character
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if data[i] != '=' {
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return false
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}
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}
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// doesn't look like a table footer
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if colCount == 1 {
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return false
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}
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p.addBlock(&ast.TableFooter{})
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return true
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}
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// tableHeaders parses the header. If recognized it will also add a table.
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func (p *Parser) tableHeader(data []byte) (size int, columns []ast.CellAlignFlags, table ast.Node) {
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i := 0
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colCount := 1
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headerIsUnderline := true
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headerIsWithEmptyFields := true
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for i = 0; i < len(data) && data[i] != '\n'; i++ {
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if data[i] == '|' && !isBackslashEscaped(data, i) {
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colCount++
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}
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if data[i] != '-' && data[i] != ' ' && data[i] != ':' && data[i] != '|' {
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headerIsUnderline = false
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}
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if data[i] != ' ' && data[i] != '|' {
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headerIsWithEmptyFields = false
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}
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}
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// doesn't look like a table header
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if colCount == 1 {
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return
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}
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// include the newline in the data sent to tableRow
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j := skipCharN(data, i, '\n', 1)
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header := data[:j]
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// column count ignores pipes at beginning or end of line
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if data[0] == '|' {
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colCount--
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}
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{
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tmp := header
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// remove whitespace from the end
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for len(tmp) > 0 {
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lastIdx := len(tmp) - 1
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if tmp[lastIdx] == '\n' || tmp[lastIdx] == ' ' {
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tmp = tmp[:lastIdx]
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} else {
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break
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}
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}
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n := len(tmp)
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if n > 2 && tmp[n-1] == '|' && !isBackslashEscaped(tmp, n-1) {
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colCount--
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}
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}
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// if the header looks like a underline, then we omit the header
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// and parse the first line again as underline
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if headerIsUnderline && !headerIsWithEmptyFields {
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header = nil
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i = 0
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} else {
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i++ // move past newline
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}
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columns = make([]ast.CellAlignFlags, colCount)
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// move on to the header underline
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if i >= len(data) {
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return
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}
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if data[i] == '|' && !isBackslashEscaped(data, i) {
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i++
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}
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i = skipChar(data, i, ' ')
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// each column header is of form: / *:?-+:? *|/ with # dashes + # colons >= 3
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// and trailing | optional on last column
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col := 0
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n := len(data)
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for i < n && data[i] != '\n' {
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dashes := 0
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if data[i] == ':' {
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i++
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columns[col] |= ast.TableAlignmentLeft
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dashes++
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}
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for i < n && data[i] == '-' {
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i++
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dashes++
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}
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if i < n && data[i] == ':' {
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i++
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columns[col] |= ast.TableAlignmentRight
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dashes++
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}
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for i < n && data[i] == ' ' {
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i++
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}
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if i == n {
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return
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}
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// end of column test is messy
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switch {
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case dashes < 3:
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// not a valid column
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return
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case data[i] == '|' && !isBackslashEscaped(data, i):
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// marker found, now skip past trailing whitespace
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col++
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i++
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for i < n && data[i] == ' ' {
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i++
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}
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// trailing junk found after last column
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if col >= colCount && i < len(data) && data[i] != '\n' {
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return
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}
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case (data[i] != '|' || isBackslashEscaped(data, i)) && col+1 < colCount:
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// something else found where marker was required
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return
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case data[i] == '\n':
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// marker is optional for the last column
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col++
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default:
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// trailing junk found after last column
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return
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}
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}
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if col != colCount {
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return
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}
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table = &ast.Table{}
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p.addBlock(table)
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if header != nil {
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p.addBlock(&ast.TableHeader{})
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p.tableRow(header, columns, true)
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}
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size = skipCharN(data, i, '\n', 1)
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return
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}
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/*
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Table:
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Name | Age | Phone
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------|-----|---------
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Bob | 31 | 555-1234
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Alice | 27 | 555-4321
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*/
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func (p *Parser) table(data []byte) int {
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i, columns, table := p.tableHeader(data)
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if i == 0 {
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return 0
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}
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p.addBlock(&ast.TableBody{})
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for i < len(data) {
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pipes, rowStart := 0, i
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for ; i < len(data) && data[i] != '\n'; i++ {
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if data[i] == '|' {
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pipes++
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}
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}
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if pipes == 0 {
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i = rowStart
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break
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}
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// include the newline in data sent to tableRow
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i = skipCharN(data, i, '\n', 1)
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if p.tableFooter(data[rowStart:i]) {
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continue
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}
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p.tableRow(data[rowStart:i], columns, false)
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}
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if captionContent, id, consumed := p.caption(data[i:], []byte("Table: ")); consumed > 0 {
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caption := &ast.Caption{}
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p.Inline(caption, captionContent)
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// Some switcheroo to re-insert the parsed table as a child of the captionfigure.
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figure := &ast.CaptionFigure{}
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figure.HeadingID = id
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table2 := &ast.Table{}
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// Retain any block level attributes.
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table2.AsContainer().Attribute = table.AsContainer().Attribute
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children := table.GetChildren()
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ast.RemoveFromTree(table)
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table2.SetChildren(children)
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ast.AppendChild(figure, table2)
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ast.AppendChild(figure, caption)
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p.addChild(figure)
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p.finalize(figure)
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i += consumed
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}
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return i
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}
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