// 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
}
// 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
}