mirror of
https://github.com/go-gitea/gitea
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The permlink in markdown will be rendered as a code preview block, like GitHub Co-authored-by: silverwind <me@silverwind.io>
154 lines
4.1 KiB
Go
154 lines
4.1 KiB
Go
// Copyright 2017 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package code
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import (
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"bytes"
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"context"
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"html/template"
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"strings"
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"code.gitea.io/gitea/modules/highlight"
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"code.gitea.io/gitea/modules/indexer/code/internal"
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"code.gitea.io/gitea/modules/timeutil"
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)
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// Result a search result to display
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type Result struct {
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RepoID int64
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Filename string
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CommitID string
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UpdatedUnix timeutil.TimeStamp
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Language string
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Color string
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Lines []*ResultLine
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}
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type ResultLine struct {
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Num int
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FormattedContent template.HTML
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}
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type SearchResultLanguages = internal.SearchResultLanguages
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type SearchOptions = internal.SearchOptions
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func indices(content string, selectionStartIndex, selectionEndIndex int) (int, int) {
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startIndex := selectionStartIndex
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numLinesBefore := 0
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for ; startIndex > 0; startIndex-- {
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if content[startIndex-1] == '\n' {
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if numLinesBefore == 1 {
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break
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}
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numLinesBefore++
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}
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}
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endIndex := selectionEndIndex
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numLinesAfter := 0
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for ; endIndex < len(content); endIndex++ {
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if content[endIndex] == '\n' {
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if numLinesAfter == 1 {
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break
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}
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numLinesAfter++
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}
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}
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return startIndex, endIndex
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}
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func writeStrings(buf *bytes.Buffer, strs ...string) error {
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for _, s := range strs {
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_, err := buf.WriteString(s)
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if err != nil {
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return err
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}
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}
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return nil
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}
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func HighlightSearchResultCode(filename, language string, lineNums []int, code string) []*ResultLine {
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// we should highlight the whole code block first, otherwise it doesn't work well with multiple line highlighting
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hl, _ := highlight.Code(filename, language, code)
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highlightedLines := strings.Split(string(hl), "\n")
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// The lineNums outputted by highlight.Code might not match the original lineNums, because "highlight" removes the last `\n`
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lines := make([]*ResultLine, min(len(highlightedLines), len(lineNums)))
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for i := 0; i < len(lines); i++ {
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lines[i] = &ResultLine{
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Num: lineNums[i],
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FormattedContent: template.HTML(highlightedLines[i]),
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}
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}
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return lines
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}
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func searchResult(result *internal.SearchResult, startIndex, endIndex int) (*Result, error) {
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startLineNum := 1 + strings.Count(result.Content[:startIndex], "\n")
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var formattedLinesBuffer bytes.Buffer
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contentLines := strings.SplitAfter(result.Content[startIndex:endIndex], "\n")
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lineNums := make([]int, 0, len(contentLines))
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index := startIndex
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for i, line := range contentLines {
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var err error
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if index < result.EndIndex &&
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result.StartIndex < index+len(line) &&
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result.StartIndex < result.EndIndex {
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openActiveIndex := max(result.StartIndex-index, 0)
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closeActiveIndex := min(result.EndIndex-index, len(line))
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err = writeStrings(&formattedLinesBuffer,
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line[:openActiveIndex],
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line[openActiveIndex:closeActiveIndex],
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line[closeActiveIndex:],
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)
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} else {
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err = writeStrings(&formattedLinesBuffer, line)
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}
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if err != nil {
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return nil, err
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}
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lineNums = append(lineNums, startLineNum+i)
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index += len(line)
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}
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return &Result{
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RepoID: result.RepoID,
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Filename: result.Filename,
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CommitID: result.CommitID,
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UpdatedUnix: result.UpdatedUnix,
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Language: result.Language,
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Color: result.Color,
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Lines: HighlightSearchResultCode(result.Filename, result.Language, lineNums, formattedLinesBuffer.String()),
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}, nil
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}
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// PerformSearch perform a search on a repository
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// if isFuzzy is true set the Damerau-Levenshtein distance from 0 to 2
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func PerformSearch(ctx context.Context, opts *SearchOptions) (int, []*Result, []*SearchResultLanguages, error) {
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if opts == nil || len(opts.Keyword) == 0 {
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return 0, nil, nil, nil
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}
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total, results, resultLanguages, err := (*globalIndexer.Load()).Search(ctx, opts)
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if err != nil {
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return 0, nil, nil, err
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}
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displayResults := make([]*Result, len(results))
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for i, result := range results {
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startIndex, endIndex := indices(result.Content, result.StartIndex, result.EndIndex)
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displayResults[i], err = searchResult(result, startIndex, endIndex)
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if err != nil {
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return 0, nil, nil, err
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}
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}
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return int(total), displayResults, resultLanguages, nil
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}
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