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// License: GPLv3 Copyright: 2023, Kovid Goyal, <kovid at kovidgoyal.net>
package unicode_names
import (
"bytes"
_ "embed"
"encoding/binary"
"fmt"
"strings"
"sync"
"time"
"github.com/kovidgoyal/kitty/tools/utils"
"github.com/kovidgoyal/kitty/tools/utils/images"
)
type mark_set = *utils.Set[uint16]
//go:embed data_generated.bin
var unicode_name_data string
var _ = fmt.Print
var names map[rune]string
var marks []rune
var word_map map[string][]uint16
func add_word(codepoint uint16, word []byte) {
if codepoint <= 32 || codepoint == 127 || (128 <= codepoint && codepoint <= 159) || len(word) < 2 {
return
}
w := utils.UnsafeBytesToString(word)
word_map[w] = append(word_map[w], codepoint)
}
func add_words(codepoint uint16, raw []byte) {
for len(raw) > 0 {
idx := bytes.IndexByte(raw, ' ')
if idx < 0 {
add_word(codepoint, raw)
break
}
if idx > 0 {
add_word(codepoint, raw[:idx])
}
raw = raw[idx+1:]
}
}
func parse_record(record []byte, mark uint16) {
codepoint := rune(binary.LittleEndian.Uint32(record))
record = record[4:]
marks[mark] = codepoint
namelen := binary.LittleEndian.Uint16(record)
record = record[2:]
name := utils.UnsafeBytesToString(record[:namelen])
names[codepoint] = name
add_words(mark, record[:namelen])
if len(record) > int(namelen) {
add_words(mark, record[namelen:])
}
}
var parse_once sync.Once
func parse_data() {
raw := utils.ReadCompressedEmbeddedData(unicode_name_data)
num_of_lines := binary.LittleEndian.Uint32(raw)
raw = raw[4:]
num_of_words := binary.LittleEndian.Uint32(raw)
raw = raw[4:]
names = make(map[rune]string, num_of_lines)
word_map = make(map[string][]uint16, num_of_words)
marks = make([]rune, num_of_lines)
var mark uint16
for len(raw) > 0 {
record_len := binary.LittleEndian.Uint16(raw)
raw = raw[2:]
parse_record(raw[:record_len], mark)
mark += 1
raw = raw[record_len:]
}
}
func Initialize() {
parse_once.Do(parse_data)
}
func NameForCodePoint(cp rune) string {
Initialize()
return names[cp]
}
func find_matching_codepoints(prefix string) (ans mark_set) {
for q, marks := range word_map {
if strings.HasPrefix(q, prefix) {
if ans == nil {
ans = utils.NewSet[uint16](len(marks) * 2)
}
ans.AddItems(marks...)
}
}
return ans
}
func marks_for_query(query string) (ans mark_set) {
Initialize()
prefixes := strings.Split(strings.ToLower(query), " ")
results := make(chan mark_set, len(prefixes))
ctx := images.Context{}
ctx.Parallel(0, len(prefixes), func(nums <-chan int) {
for i := range nums {
results <- find_matching_codepoints(prefixes[i])
}
})
close(results)
for x := range results {
if ans == nil {
ans = x
} else {
ans = ans.Intersect(x)
}
}
if ans == nil {
ans = utils.NewSet[uint16](0)
}
return
}
func CodePointsForQuery(query string) (ans []rune) {
x := marks_for_query(query)
ans = make([]rune, x.Len())
i := 0
for m := range x.Iterable() {
ans[i] = marks[m]
i += 1
}
return
}
func Develop() {
start := time.Now()
Initialize()
fmt.Println("Parsing unicode name data took:", time.Since(start))
start = time.Now()
num := CodePointsForQuery("arr")
fmt.Println("Querying arr took:", time.Since(start), "and found:", len(num))
start = time.Now()
num = CodePointsForQuery("arr right")
fmt.Println("Querying arr right took:", time.Since(start), "and found:", len(num))
}
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