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initial viewing of content / ansi img
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| package ui | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "image/color" | ||
| "io" | ||
| "net/http" | ||
|
|
||
| "code.rocketnine.space/tslocum/cview" | ||
| "github.com/eliukblau/pixterm/pkg/ansimage" | ||
| "github.com/gdamore/tcell/v2" | ||
| api "github.com/ipfs/go-ipfs-api" | ||
| ) | ||
|
|
||
| type Content struct { | ||
| *cview.TextView | ||
|
|
||
| app *App | ||
| entry *api.MfsLsEntry | ||
| } | ||
|
|
||
| func NewContentView(app *App) *Content { | ||
| m := &Content{ | ||
| TextView: cview.NewTextView(), | ||
| app: app, | ||
| } | ||
| m.SetBorder(true) | ||
| m.SetPadding(1, 1, 1, 1) | ||
| m.SetTitle("content") | ||
| m.SetBackgroundColor(tcell.ColorDefault) | ||
|
|
||
| return m | ||
| } | ||
|
|
||
| func (c *Content) SetItem(path string, entry *api.MfsLsEntry) { | ||
|
|
||
| data, err := c.app.client.ReadFile(path, entry) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| contentType, err := getFileContentType(data) | ||
| if err != nil { | ||
| c.SetText(err.Error()) | ||
| } | ||
|
|
||
| switch contentType { | ||
| case "image/png": | ||
| c.SetDynamicColors(true) | ||
| _, _, w, h := c.GetInnerRect() | ||
| r := bytes.NewReader(data) | ||
| img := translateImage(r, w, h) | ||
| c.SetText(img) | ||
| default: | ||
| c.SetText(contentType) | ||
| } | ||
| } | ||
|
|
||
| func translateImage(reader io.Reader, x, y int) string { | ||
| img, err := buildImage(reader, x, y) | ||
| if err != nil { | ||
| return "" | ||
| } | ||
| ansi := img.Render() | ||
| return cview.TranslateANSI(ansi) | ||
|
|
||
| } | ||
|
|
||
| func buildImage(reader io.Reader, x, y int) (*ansimage.ANSImage, error) { | ||
| pix, err := ansimage.NewScaledFromReader(reader, y, x, color.Transparent, ansimage.ScaleModeFill, ansimage.NoDithering) | ||
| // pix, err := ansimage.NewScaledFromURL(url, y, x, color.Transparent, ansimage.ScaleModeResize, ansimage.NoDithering) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return pix, nil | ||
|
|
||
| } | ||
|
|
||
| func getFileContentType(data []byte) (string, error) { | ||
|
|
||
| s := bytes.NewBuffer(data) | ||
|
|
||
| // Only the first 512 bytes are used to sniff the content type. | ||
| buffer := make([]byte, 512) | ||
|
|
||
| _, err := s.Read(buffer) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| // Use the net/http package's handy DectectContentType function. Always returns a valid | ||
| // content-type by returning "application/octet-stream" if no others seemed to match. | ||
| contentType := http.DetectContentType(buffer) | ||
|
|
||
| return contentType, nil | ||
| } |