ref: 3ddf47ad691b8fdae0aa930543107052a6ee2d6d
dir: /style/experimental.go/
package style import ( "9fans.net/go/draw" "github.com/chris-ramon/douceur/css" "fmt" "github.com/mjl-/duit" "image" "github.com/psilva261/opossum" "github.com/psilva261/opossum/img" "strings" ) var colorCache = make(map[draw.Color]*draw.Image) var fetcher opossum.Fetcher func SetFetcher(f opossum.Fetcher) { fetcher = f } var TextNode = Map{ Declarations: map[string]css.Declaration{ "display": css.Declaration{ Property: "display", Value: "inline", }, }, } func (cs Map) BoxBackground() (i *draw.Image, err error) { var bgImg *draw.Image bgImg = cs.backgroundImage() if bgImg == nil { bgColor, ok := cs.backgroundColor() if !ok { return } log.Printf("bgColor=%+v", bgColor) i, ok = colorCache[bgColor] if !ok { var err error i, err = dui.Display.AllocImage(image.Rect(0, 0, 10, 10), draw.ARGB32, true, bgColor) if err != nil { return nil, fmt.Errorf("alloc img: %w", err) } colorCache[bgColor] = i } } else { i = bgImg } return } func (cs Map) backgroundColor() (c draw.Color, ok bool) { _, ok = cs.Declarations["background-color"] if ok { c, ok = cs.colorHex("background-color") if !ok { return } return c, true } _, ok = cs.Declarations["background"] if ok { c, ok = cs.colorHex("background") if !ok { return } return c, true } return } func backgroundImageUrl(decl css.Declaration) (url string, ok bool) { if v := decl.Value; strings.Contains(v, "url(") && strings.Contains(v, ")") { v = strings.ReplaceAll(v, `"`, "") v = strings.ReplaceAll(v, `'`, "") from := strings.Index(v, "url(") if from < 0 { log.Printf("bg img: no url: %v", decl.Value) return } from += len("url(") imgUrl := v[from:] to := strings.Index(imgUrl, ")") if to < 0 { log.Printf("bg img: no ): %v", decl.Value) return } imgUrl = imgUrl[:to] return imgUrl, true } else { log.Printf("bg img: missing ( or ) '%+v'", decl.Value) return } } func (cs Map) backgroundImage() (i *draw.Image) { decl, ok := cs.Declarations["background-image"] if !ok { decl, ok = cs.Declarations["background"] } if ok { imgUrl, ok := backgroundImageUrl(decl) if !ok { log.Printf("bg img not ok") return } w := cs.Width() h := cs.Height() r, err := img.Load(fetcher, imgUrl, w, h) if err != nil { log.Errorf("bg img load %v: %v", imgUrl, err) return nil } i, err = duit.ReadImage(dui.Display, r) if err != nil { log.Errorf("bg read image %v: %v", imgUrl, err) return } return i } return }