update vendor

Signed-off-by: Ronni Skansing <rskansing@gmail.com>

backend/vendor/github.com/go-sourcemap/sourcemap/consumer.go

@@ -0,0 +1,253 @@
+package sourcemap
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/url"
+	"path"
+	"sort"
+)
+
+type sourceMap struct {
+	Version        int               `json:"version"`
+	File           string            `json:"file"`
+	SourceRoot     string            `json:"sourceRoot"`
+	Sources        []string          `json:"sources"`
+	SourcesContent []string          `json:"sourcesContent"`
+	Names          []json.RawMessage `json:"names,string"`
+	Mappings       string            `json:"mappings"`
+
+	mappings []mapping
+}
+
+type v3 struct {
+	sourceMap
+	Sections []section `json:"sections"`
+}
+
+func (m *sourceMap) parse(sourcemapURL string) error {
+	if err := checkVersion(m.Version); err != nil {
+		return err
+	}
+
+	var sourceRootURL *url.URL
+	if m.SourceRoot != "" {
+		u, err := url.Parse(m.SourceRoot)
+		if err != nil {
+			return err
+		}
+		if u.IsAbs() {
+			sourceRootURL = u
+		}
+	} else if sourcemapURL != "" {
+		u, err := url.Parse(sourcemapURL)
+		if err != nil {
+			return err
+		}
+		if u.IsAbs() {
+			u.Path = path.Dir(u.Path)
+			sourceRootURL = u
+		}
+	}
+
+	for i, src := range m.Sources {
+		m.Sources[i] = m.absSource(sourceRootURL, src)
+	}
+
+	mappings, err := parseMappings(m.Mappings)
+	if err != nil {
+		return err
+	}
+
+	m.mappings = mappings
+	// Free memory.
+	m.Mappings = ""
+
+	return nil
+}
+
+func (m *sourceMap) absSource(root *url.URL, source string) string {
+	if path.IsAbs(source) {
+		return source
+	}
+
+	if u, err := url.Parse(source); err == nil && u.IsAbs() {
+		return source
+	}
+
+	if root != nil {
+		u := *root
+		u.Path = path.Join(u.Path, source)
+		return u.String()
+	}
+
+	if m.SourceRoot != "" {
+		return path.Join(m.SourceRoot, source)
+	}
+
+	return source
+}
+
+func (m *sourceMap) name(idx int) string {
+	if idx >= len(m.Names) {
+		return ""
+	}
+
+	raw := m.Names[idx]
+	if len(raw) == 0 {
+		return ""
+	}
+
+	if raw[0] == '"' && raw[len(raw)-1] == '"' {
+		var str string
+		if err := json.Unmarshal(raw, &str); err == nil {
+			return str
+		}
+	}
+
+	return string(raw)
+}
+
+type section struct {
+	Offset struct {
+		Line   int `json:"line"`
+		Column int `json:"column"`
+	} `json:"offset"`
+	Map *sourceMap `json:"map"`
+}
+
+type Consumer struct {
+	sourcemapURL string
+	file         string
+	sections     []section
+}
+
+func Parse(sourcemapURL string, b []byte) (*Consumer, error) {
+	v3 := new(v3)
+	err := json.Unmarshal(b, v3)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := checkVersion(v3.Version); err != nil {
+		return nil, err
+	}
+
+	if len(v3.Sections) == 0 {
+		v3.Sections = append(v3.Sections, section{
+			Map: &v3.sourceMap,
+		})
+	}
+
+	for _, s := range v3.Sections {
+		err := s.Map.parse(sourcemapURL)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	reverse(v3.Sections)
+	return &Consumer{
+		sourcemapURL: sourcemapURL,
+		file:         v3.File,
+		sections:     v3.Sections,
+	}, nil
+}
+
+func (c *Consumer) SourcemapURL() string {
+	return c.sourcemapURL
+}
+
+// File returns an optional name of the generated code
+// that this source map is associated with.
+func (c *Consumer) File() string {
+	return c.file
+}
+
+// Source returns the original source, name, line, and column information
+// for the generated source's line and column positions.
+func (c *Consumer) Source(
+	genLine, genColumn int,
+) (source, name string, line, column int, ok bool) {
+	for i := range c.sections {
+		s := &c.sections[i]
+		if s.Offset.Line < genLine ||
+			(s.Offset.Line+1 == genLine && s.Offset.Column <= genColumn) {
+			genLine -= s.Offset.Line
+			genColumn -= s.Offset.Column
+			return c.source(s.Map, genLine, genColumn)
+		}
+	}
+	return
+}
+
+func (c *Consumer) source(
+	m *sourceMap, genLine, genColumn int,
+) (source, name string, line, column int, ok bool) {
+	i := sort.Search(len(m.mappings), func(i int) bool {
+		m := &m.mappings[i]
+		if int(m.genLine) == genLine {
+			return int(m.genColumn) >= genColumn
+		}
+		return int(m.genLine) >= genLine
+	})
+
+	// Mapping not found.
+	if i == len(m.mappings) {
+		return
+	}
+
+	match := &m.mappings[i]
+
+	// Fuzzy match.
+	if int(match.genLine) > genLine || int(match.genColumn) > genColumn {
+		if i == 0 {
+			return
+		}
+		match = &m.mappings[i-1]
+	}
+
+	if match.sourcesInd >= 0 {
+		source = m.Sources[match.sourcesInd]
+	}
+	if match.namesInd >= 0 {
+		name = m.name(int(match.namesInd))
+	}
+	line = int(match.sourceLine)
+	column = int(match.sourceColumn)
+	ok = true
+	return
+}
+
+// SourceContent returns the original source content for the source.
+func (c *Consumer) SourceContent(source string) string {
+	for i := range c.sections {
+		s := &c.sections[i]
+		for i, src := range s.Map.Sources {
+			if src == source {
+				if i < len(s.Map.SourcesContent) {
+					return s.Map.SourcesContent[i]
+				}
+				break
+			}
+		}
+	}
+	return ""
+}
+
+func checkVersion(version int) error {
+	if version == 3 || version == 0 {
+		return nil
+	}
+	return fmt.Errorf(
+		"sourcemap: got version=%d, but only 3rd version is supported",
+		version,
+	)
+}
+
+func reverse(ss []section) {
+	last := len(ss) - 1
+	for i := 0; i < len(ss)/2; i++ {
+		ss[i], ss[last-i] = ss[last-i], ss[i]
+	}
+}