示例#1
0
// ImageWidth takes a file path (or sprite glob) and returns the
// width in pixels of the image being referenced.
func ImageWidth(mainctx context.Context, usv libsass.SassValue) (rsv *libsass.SassValue, err error) {
	var (
		glob, name string
	)
	comp, err := libsass.CompFromCtx(mainctx)
	if err != nil {
		return
	}

	err = libsass.Unmarshal(usv, &name)
	// Check for sprite-file override first
	if err != nil {
		var inf interface{}
		var infs []interface{}
		// Can't unmarshal to []interface{}, so unmarshal to
		// interface{} then reflect it into a []interface{}
		err = libsass.Unmarshal(usv, &inf)
		k := reflect.ValueOf(&infs).Elem()
		k.Set(reflect.ValueOf(inf))

		if err != nil {
			return
		}
		glob = infs[0].(string)
		name = infs[1].(string)
	}
	paths := comp.(libsass.Pather)
	imgs := sw.New(&sw.Options{
		ImageDir:  paths.ImgDir(),
		BuildDir:  paths.BuildDir(),
		GenImgDir: paths.ImgBuildDir(),
	})

	loadctx := comp.Payload()
	var images payload.Payloader

	if len(glob) == 0 {
		images = payload.Image(loadctx)
		hit := images.Get(name)
		if hit != nil {
			imgs = hit
		} else {
			imgs.Decode(name)
			images.Set(name, imgs)
		}
	} else {
		// Glob present, look up in sprites
		sprites := payload.Sprite(loadctx)
		imgs = sprites.Get(glob)
	}
	w := imgs.SImageWidth(name)
	ww := libs.SassNumber{
		Value: float64(w),
		Unit:  "px",
	}
	res, err := libsass.Marshal(ww)
	return &res, err
}
示例#2
0
func testSprite(t *testing.T, comp libsass.Compiler) {
	paths := comp.(libsass.Pather)
	// Generate test sprite
	imgs := spritewell.New(&spritewell.Options{
		ImageDir:  paths.ImgDir(),
		BuildDir:  paths.BuildDir(),
		GenImgDir: paths.ImgBuildDir(),
	})
	glob := "*.png"
	err := imgs.Decode(glob)
	if err != nil {
		t.Fatal(err)
	}

}
示例#3
0
// SpriteMap returns a sprite from the passed glob and sprite
// parameters.
func SpriteMap(mainctx context.Context, usv libsass.SassValue) (*libsass.SassValue, error) {
	var glob string
	var spacing libs.SassNumber
	err := libsass.Unmarshal(usv, &glob, &spacing)
	if err != nil {
		return nil, err
	}
	comp, err := libsass.CompFromCtx(mainctx)
	if err != nil {
		return nil, err
	}
	paths := comp.(libsass.Pather)
	imgs := sw.New(&sw.Options{
		ImageDir:  paths.ImgDir(),
		BuildDir:  paths.BuildDir(),
		GenImgDir: paths.ImgBuildDir(),
		Padding:   int(spacing.Value),
	})
	if cglob, err := strconv.Unquote(glob); err == nil {
		glob = cglob
	}

	key := glob + strconv.FormatInt(int64(spacing.Value), 10)

	loadctx := comp.Payload()
	sprites := payload.Sprite(loadctx)

	// FIXME: wtf is this?
	// sprites.RLock()
	// if _, ok := sprites.M[key]; ok {
	// 	defer sprites.RUnlock()
	// 	res, err := libsass.Marshal(key)
	// 	if err != nil {
	// 		return setErrorAndReturn(err, rsv)
	// 	}
	// 	if rsv != nil {
	// 		*rsv = res
	// 	}
	// 	return nil
	// }
	// sprites.RUnlock()

	err = imgs.Decode(glob)
	if err != nil {
		return nil, err
	}

	_, err = imgs.Export()
	if err != nil {
		return nil, err
	}

	res, err := libsass.Marshal(key)
	if err != nil {
		return nil, err
	}

	sprites.Set(key, imgs)

	return &res, nil
}
示例#4
0
// ImageHeight takes a file path (or sprite glob) and returns the
// height in pixels of the image being referenced.
func ImageHeight(mainctx context.Context, usv libsass.SassValue) (*libsass.SassValue, error) {
	var (
		glob string
		name string
	)

	comp, err := libsass.CompFromCtx(mainctx)
	if err != nil {
		return nil, err
	}

	err = libsass.Unmarshal(usv, &name)
	// Check for sprite-file override first
	if err != nil {
		var inf interface{}
		var infs []interface{}
		// Can't unmarshal to []interface{}, so unmarshal to
		// interface{} then reflect it into a []interface{}
		err = libsass.Unmarshal(usv, &inf)
		k := reflect.ValueOf(&infs).Elem()
		k.Set(reflect.ValueOf(inf))

		if err != nil {
			return nil, err
		}
		glob = infs[0].(string)
		name = infs[1].(string)
	}
	paths := comp.(libsass.Pather)
	imgs := sw.New(&sw.Options{
		ImageDir:  paths.ImgDir(),
		BuildDir:  paths.BuildDir(),
		GenImgDir: paths.ImgBuildDir(),
	})

	loadctx := comp.Payload()
	if loadctx == nil {
		return nil, ErrPayloadNil
	}

	images := payload.Image(loadctx)
	if images == nil {
		return nil, errors.New("inline payload not available")
	}

	if len(glob) == 0 {
		exst := images.Get(name)
		if exst != nil {
			imgs = exst
		} else {
			imgs.Decode(name)
			// Store images in global cache
			images.Set(name, imgs)
		}
	} else {
		sprites := payload.Sprite(loadctx)
		imgs = sprites.Get(glob)
		if imgs == nil {
			return nil, errors.New("Sprite not found")
		}
	}
	height := imgs.SImageHeight(name)
	Hheight := libs.SassNumber{
		Value: float64(height),
		Unit:  "px",
	}
	res, err := libsass.Marshal(Hheight)
	return &res, err
}