333 lines
8.6 KiB
Go
333 lines
8.6 KiB
Go
// License: GPLv3 Copyright: 2023, Kovid Goyal, <kovid at kovidgoyal.net>
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package hints
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import (
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"fmt"
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"kitty"
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"kitty/tools/config"
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"kitty/tools/utils"
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"path/filepath"
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"regexp"
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"strings"
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"unicode/utf8"
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"github.com/seancfoley/ipaddress-go/ipaddr"
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"golang.org/x/exp/slices"
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)
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var _ = fmt.Print
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const (
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DEFAULT_HINT_ALPHABET = "0123456789abcdefghijklmnopqrstuvwxyz"
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DEFAULT_REGEX = `(?m)^\s*(.+)\s*$`
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FILE_EXTENSION = `\.(?:[a-zA-Z0-9]{2,7}|[ahcmo])(?!\.)`
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)
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func path_regex() string {
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return fmt.Sprintf(`(?:\S*?/[\r\S]+)|(?:\S[\r\S]*{%s})\b`, FILE_EXTENSION)
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}
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func default_linenum_regex() string {
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return fmt.Sprintf(`(?P<path>%s):(?P<line>\d+)`, path_regex())
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}
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type Mark struct {
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Index, Start, End int
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Text, Group_id string
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Is_hyperlink bool
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Groupdict map[string]string
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}
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func process_escape_codes(text string) (ans string, hyperlinks []Mark) {
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removed_size, idx := 0, 0
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active_hyperlink_url := ""
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active_hyperlink_id := ""
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active_hyperlink_start_offset := 0
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add_hyperlink := func(end int) {
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hyperlinks = append(hyperlinks, Mark{
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Index: idx, Start: active_hyperlink_start_offset, End: end, Text: active_hyperlink_url, Is_hyperlink: true, Group_id: active_hyperlink_id})
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active_hyperlink_url, active_hyperlink_id = "", ""
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active_hyperlink_start_offset = 0
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idx++
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}
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ans = utils.ReplaceAll(utils.MustCompile("\x1b(?:\\[[0-9;:]*?m|\\].*?\x1b\\\\)"), text, func(raw string, groupdict map[string]utils.SubMatch) string {
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if !strings.HasPrefix(raw, "\x1b]8") {
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removed_size += len(raw)
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return ""
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}
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start := groupdict[""].Start - removed_size
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removed_size += len(raw)
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if active_hyperlink_url != "" {
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add_hyperlink(start)
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}
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raw = raw[4 : len(raw)-2]
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if metadata, url, found := strings.Cut(raw, ";"); found && url != "" {
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active_hyperlink_url = url
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active_hyperlink_start_offset = start
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if metadata != "" {
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for _, entry := range strings.Split(metadata, ":") {
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if strings.HasPrefix(entry, "id=") && len(entry) > 3 {
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active_hyperlink_id = entry[3:]
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}
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}
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}
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}
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return ""
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})
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if active_hyperlink_url != "" {
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add_hyperlink(len(ans))
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}
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return
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}
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type PostProcessorFunc = func(string, int, int) (int, int)
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func is_punctuation(b string) bool {
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switch b {
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case ",", ".", "?", "!":
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return true
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}
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return false
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}
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func closing_bracket_for(ch string) string {
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switch ch {
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case "(":
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return ")"
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case "[":
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return "]"
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case "{":
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return "}"
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case "<":
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return ">"
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case "*":
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return "*"
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case `"`:
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return `"`
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case "'":
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return "'"
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case "“":
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return "”"
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case "‘":
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return "’"
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}
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return ""
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}
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func char_at(s string, i int) string {
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ans, _ := utf8.DecodeRuneInString(s[i:])
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if ans == utf8.RuneError {
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return ""
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}
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return string(ans)
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}
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func matching_remover(openers ...string) PostProcessorFunc {
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return func(text string, s, e int) (int, int) {
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if s < e && e <= len(text) {
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before := char_at(text, s)
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if slices.Index(openers, before) > -1 {
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q := closing_bracket_for(before)
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if e > 0 && char_at(text, e-1) == q {
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s++
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e--
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} else if char_at(text, e) == q {
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s++
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}
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}
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}
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return s, e
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}
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}
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var PostProcessorMap = (&utils.Once[map[string]PostProcessorFunc]{Run: func() map[string]PostProcessorFunc {
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return map[string]PostProcessorFunc{
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"url": func(text string, s, e int) (int, int) {
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if s > 4 && text[s-5:s] == "link:" { // asciidoc URLs
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url := text[s:e]
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idx := strings.LastIndex(url, "[")
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if idx > -1 {
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e -= len(url) - idx
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}
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}
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for e > 1 && is_punctuation(char_at(text, e)) { // remove trailing punctuation
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e--
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}
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// truncate url at closing bracket/quote
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if s > 0 && e <= len(text) && closing_bracket_for(char_at(text, s-1)) != "" {
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q := closing_bracket_for(char_at(text, s-1))
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idx := strings.Index(text[s:], q)
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if idx > 0 {
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e = s + idx
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}
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}
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// reStructuredText URLs
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if e > 3 && text[e-2:e] == "`_" {
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e -= 2
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}
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return s, e
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},
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"brackets": matching_remover("(", "{", "[", "<"),
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"quotes": matching_remover("'", `"`, "“", "‘"),
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"ip": func(text string, s, e int) (int, int) {
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addr := ipaddr.NewHostName(text[s:e])
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if !addr.IsAddress() {
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return -1, -1
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}
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return s, e
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},
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}
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}}).Get
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type KittyOpts struct {
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Url_prefixes *utils.Set[string]
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Select_by_word_characters string
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}
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func read_relevant_kitty_opts(path string) KittyOpts {
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ans := KittyOpts{Select_by_word_characters: kitty.KittyConfigDefaults.Select_by_word_characters}
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handle_line := func(key, val string) error {
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switch key {
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case "url_prefixes":
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ans.Url_prefixes = utils.NewSetWithItems(strings.Split(val, " ")...)
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case "select_by_word_characters":
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ans.Select_by_word_characters = strings.TrimSpace(val)
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}
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return nil
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}
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cp := config.ConfigParser{LineHandler: handle_line}
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cp.ParseFiles(path)
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if ans.Url_prefixes == nil {
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ans.Url_prefixes = utils.NewSetWithItems(kitty.KittyConfigDefaults.Url_prefixes...)
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}
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return ans
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}
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var RelevantKittyOpts = (&utils.Once[KittyOpts]{Run: func() KittyOpts {
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return read_relevant_kitty_opts(filepath.Join(utils.ConfigDir(), "kitty.conf"))
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}}).Get
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func functions_for(opts *Options) (pattern string, post_processors []PostProcessorFunc) {
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switch opts.Type {
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case "url":
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var url_prefixes *utils.Set[string]
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if opts.UrlPrefixes == "default" {
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url_prefixes = RelevantKittyOpts().Url_prefixes
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} else {
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url_prefixes = utils.NewSetWithItems(strings.Split(opts.UrlPrefixes, ",")...)
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}
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pattern = fmt.Sprintf(`(?:%s)://[^%s]{3,}`, strings.Join(url_prefixes.AsSlice(), "|"), URL_DELIMITERS)
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post_processors = append(post_processors, PostProcessorMap()["url"])
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case "path":
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pattern = path_regex()
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post_processors = append(post_processors, PostProcessorMap()["brackets"], PostProcessorMap()["quotes"])
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case "line":
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pattern = "(?m)^\\s*(.+)[\\s\x00]*$"
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case "hash":
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pattern = "[0-9a-f][0-9a-f\r]{6,127}"
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case "ip":
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pattern = (
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// IPv4 with no validation
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`((?:\d{1,3}\.){3}\d{1,3}` + "|" +
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// IPv6 with no validation
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`(?:[a-fA-F0-9]{0,4}:){2,7}[a-fA-F0-9]{1,4})`)
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post_processors = append(post_processors, PostProcessorMap()["ip"])
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case "word":
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chars := opts.WordCharacters
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if chars == "" {
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chars = RelevantKittyOpts().Select_by_word_characters
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}
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chars = regexp.QuoteMeta(chars)
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pattern = fmt.Sprintf(`(?u)[%s\pL\pN]{%d,}`, chars, opts.MinimumMatchLength)
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post_processors = append(post_processors, PostProcessorMap()["brackets"], PostProcessorMap()["quotes"])
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default:
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pattern = opts.Regex
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if opts.Type == "linenum" {
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if pattern == DEFAULT_REGEX {
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pattern = default_linenum_regex()
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}
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}
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}
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return
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}
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func mark(r *regexp.Regexp, post_processors []PostProcessorFunc, text string, opts *Options) (ans []Mark) {
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sanitize_pat := regexp.MustCompile("[\r\n\x00]")
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names := r.SubexpNames()
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for i, v := range r.FindAllStringSubmatchIndex(text, -1) {
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match_start, match_end := v[0], v[1]
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for match_end > match_start+1 && text[match_end-1] == 0 {
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match_end--
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}
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full_match := text[match_start:match_end]
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if len([]rune(full_match)) < opts.MinimumMatchLength {
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continue
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}
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for _, f := range post_processors {
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match_start, match_end = f(text, match_start, match_end)
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if match_start < 0 {
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break
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}
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}
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if match_start < 0 {
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continue
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}
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full_match = sanitize_pat.ReplaceAllLiteralString(text[match_start:match_end], "")
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gd := make(map[string]string, len(names))
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for x, name := range names {
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if name != "" {
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idx := 2 * x
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if s, e := v[idx], v[idx]+1; s > -1 && e > -1 {
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s = utils.Max(s, match_start)
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e = utils.Min(e, match_end)
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gd[name] = sanitize_pat.ReplaceAllLiteralString(text[s:e], "")
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}
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}
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}
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ans = append(ans, Mark{
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Index: i, Start: match_start, End: match_end, Text: full_match, Groupdict: gd,
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})
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}
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return
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}
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func find_marks(text string, opts *Options) (ans []Mark, index_map map[int]*Mark, err error) {
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text, hyperlinks := process_escape_codes(text)
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pattern, post_processors := functions_for(opts)
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if opts.Type == "hyperlink" {
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ans = hyperlinks
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} else {
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r, err := regexp.Compile(pattern)
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if err != nil {
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return nil, nil, fmt.Errorf("Failed to compile the regex pattern: %#v with error: %w", pattern, err)
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}
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ans = mark(r, post_processors, text, opts)
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}
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if len(ans) == 0 {
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none_of := "matches"
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switch opts.Type {
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case "urls":
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none_of = "URLs"
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case "hyperlinks":
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none_of = "hyperlinks"
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}
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return nil, nil, fmt.Errorf("No %s found", none_of)
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}
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largest_index := ans[len(ans)-1].Index
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offset := utils.Max(0, opts.HintsOffset)
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index_map = make(map[int]*Mark, len(ans))
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for _, m := range ans {
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if opts.Ascending {
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m.Index += offset
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} else {
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m.Index = largest_index - m.Index + offset
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}
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index_map[m.Index] = &m
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}
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return
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}
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