-
Notifications
You must be signed in to change notification settings - Fork 182
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
implement thumbnail support for txt files
- Loading branch information
David Christofas
committed
Apr 29, 2021
1 parent
9ddfab8
commit 12b4a26
Showing
16 changed files
with
160 additions
and
59 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,5 @@ | ||
| Enhancement: Support thumbnails for txt files | ||
|
|
||
| Implemented support for thumbnails for txt files in the thumbnails service. | ||
|
|
||
| https://github.com/owncloud/ocis/pull/1988 |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| package preprocessor | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "github.com/golang/freetype" | ||
| "github.com/golang/freetype/truetype" | ||
| "github.com/pkg/errors" | ||
| "golang.org/x/image/font" | ||
| "golang.org/x/image/font/gofont/goregular" | ||
| "image" | ||
| "image/draw" | ||
| "io" | ||
| "mime" | ||
| "strings" | ||
| ) | ||
|
|
||
| const ( | ||
| fontSize = 12 | ||
| spacing float64 = 1.5 | ||
| ) | ||
|
|
||
| type FileConverter interface { | ||
| Convert(r io.Reader) (image.Image, error) | ||
| } | ||
|
|
||
| type ImageDecoder struct{} | ||
|
|
||
| func (i ImageDecoder) Convert(r io.Reader) (image.Image, error) { | ||
| img, _, err := image.Decode(r) | ||
| if err != nil { | ||
| return nil, errors.Wrap(err, `could not decode the image`) | ||
| } | ||
| return img, nil | ||
| } | ||
|
|
||
| type TxtToImageConverter struct{} | ||
|
|
||
| func (t TxtToImageConverter) Convert(r io.Reader) (image.Image, error) { | ||
| img := image.NewRGBA(image.Rect(0, 0, 640, 480)) | ||
| draw.Draw(img, img.Bounds(), image.White, image.Point{}, draw.Src) | ||
|
|
||
| c := freetype.NewContext() | ||
| // Ignoring the error since we are using the embedded Golang font. | ||
| // This shouldn't return an error. | ||
| f, _ := truetype.Parse(goregular.TTF) | ||
| c.SetFont(f) | ||
| c.SetFontSize(fontSize) | ||
| c.SetClip(img.Bounds()) | ||
| c.SetDst(img) | ||
| c.SetSrc(image.Black) | ||
| c.SetHinting(font.HintingFull) | ||
| pt := freetype.Pt(10, 10+int(c.PointToFixed(fontSize)>>6)) | ||
|
|
||
| scanner := bufio.NewScanner(r) | ||
| for scanner.Scan() { | ||
| txt := scanner.Text() | ||
| cs := chunks(txt, 80) | ||
| for _, s := range cs { | ||
| _, err := c.DrawString(strings.TrimSpace(s), pt) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| pt.Y += c.PointToFixed(fontSize * spacing) | ||
| if pt.Y.Round() >= img.Bounds().Dy() { | ||
| return img, scanner.Err() | ||
| } | ||
| } | ||
|
|
||
| } | ||
| return img, scanner.Err() | ||
| } | ||
|
|
||
| // Code from https://stackoverflow.com/a/61469854 | ||
| // Written By Igor Mikushkin | ||
| func chunks(s string, chunkSize int) []string { | ||
| if chunkSize >= len(s) { | ||
| return []string{s} | ||
| } | ||
| var chunks []string | ||
| chunk := make([]rune, chunkSize) | ||
| length := 0 | ||
| for _, r := range s { | ||
| chunk[length] = r | ||
| length++ | ||
| if length == chunkSize { | ||
| chunks = append(chunks, string(chunk)) | ||
| length = 0 | ||
| } | ||
| } | ||
| if length > 0 { | ||
| chunks = append(chunks, string(chunk[:length])) | ||
| } | ||
| return chunks | ||
| } | ||
|
|
||
| func ForType(mimeType string) FileConverter { | ||
| // We can ignore the error here because we parse it in IsMimeTypeSupported before and if it fails | ||
| // return the service call. So we should only get here when the mimeType parses fine. | ||
| mimeType, _, _ = mime.ParseMediaType(mimeType) | ||
| switch mimeType { | ||
| case "text/plain": | ||
| return TxtToImageConverter{} | ||
| default: | ||
| return ImageDecoder{} | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.