5a377a2198
- PdfReader renders PDFs to canvas with page navigation and page-number progress, reusing the same integer progress model as comics. - Reader routes by file container, not media kind, so a PDF in a comics library and a PDF ebook both open in the PDF reader. - pdf.js is dynamically imported: the main bundle stays 443 kB and the 474 kB pdf chunk plus 1.26 MB worker load only when a PDF is actually opened. - comics cover extractor now only handles zip archives. A PDF in a comics library is a valid item but not a zip, so it returns no cover instead of logging an error on every request. - fixed the page scale to leave slack for the vertical scrollbar, which was otherwise forcing a horizontal scrollbar on tall pages. Verified live: a 3-page PDF renders, navigates, and reports 33% progress.
62 lines
1.4 KiB
Go
62 lines
1.4 KiB
Go
package comics
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import (
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"context"
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"database/sql"
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"fmt"
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"os"
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"path"
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"path/filepath"
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"strings"
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"github.com/mithral/vellum/internal/media"
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)
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func init() {
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media.RegisterCoverExtractor(Kind, ExtractCover)
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}
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// ExtractCover writes the first page of the archive into the cache and returns
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// its path. A comic's first page is its cover by convention.
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//
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// Only zip-based archives are handled. A PDF in a comics library is a valid
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// item but not a zip, so it returns no cover rather than logging an error on
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// every request — the grid falls back to a placeholder.
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func ExtractCover(ctx context.Context, db *sql.DB, item media.Item, absPath, cacheDir string) (string, error) {
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switch strings.ToLower(filepath.Ext(item.Path)) {
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case ".cbz", ".zip":
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default:
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return "", nil
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}
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pages, err := ListPages(absPath)
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if err != nil {
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return "", err
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}
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dir, err := media.CoverCacheDir(cacheDir, Kind)
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if err != nil {
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return "", err
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}
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ext := strings.ToLower(path.Ext(pages[0].Name))
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if ext == "" {
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ext = ".jpg"
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}
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outPath := filepath.Join(dir, fmt.Sprintf("%d%s", item.ID, ext))
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data, err := ReadPage(absPath, pages[0].Name)
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if err != nil {
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return "", err
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}
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tmp := outPath + ".tmp"
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if err := os.WriteFile(tmp, data, 0o640); err != nil {
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return "", fmt.Errorf("comics: write cover: %w", err)
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}
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if err := os.Rename(tmp, outPath); err != nil {
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_ = os.Remove(tmp)
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return "", err
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}
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return outPath, nil
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}
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