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https://github.com/sitegeist/Sitegeist.Kaleidoscope

Responsive Images for Neos CMS
https://github.com/sitegeist/Sitegeist.Kaleidoscope

hacktoberfest neos-fusion neoscms responsive responsive-images

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Responsive Images for Neos CMS

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README 

        
# Sitegeist.Kaleidoscope






## Responsive Images for Neos - with Atomic.Fusion & Monocle in mind



This package implements responsive-images for Neos for being used via Fusion.



```

imageSource = Sitegeist.Kaleidoscope:DummyImageSource



renderer = afx`

    

`

```



By separating the aspects of image-definition, size-constraining and  rendering

we enable the separation of those aspects into different fusion-components.



We want to help implementing responsive-images in the context of atomic-fusion

and enable previewing fusion-components and their full responsive behavior in the

Sitegeist.Monocle living styleguide.



Sitegeist.Kaleidoscope comes with four Fusion-ImageSources:



- Sitegeist.Kaleidoscope:AssetImageSource: Images uploaded by Editors

- Sitegeist.Kaleidoscope:DummyImageSource: Dummy images created by a local service

- Sitegeist.Kaleidoscope:ResourceImageSource: Static resources from Packages

- Sitegeist.Kaleidoscope:UriImageSource: any Url



### Authors & Sponsors



* Martin Ficzel - [email protected]

* Wilhelm Behncke - [email protected]



*The development and the public-releases of this package is generously sponsored

by our employer http://www.sitegeist.de.*



## Installation



Sitegeist.Kaleidoscope is available via packagist run `composer require sitegeist/kaleidoscope`.

We use semantic versioning so every breaking change will increase the major-version number.



## Configuration



Some image libraries have problems with WebP image formats. To avoid problems, a fallback image

format can be configured, which will be used for rendering if the requested format fails. The default value is `png`.



```yaml

Sitegeist:

  Kaleidoscope:

    dummyImage:

      fallbackFormat: 'png'

```



Moreover, as some image libraries (like Vips) also have problems with the generation of the dummy image, the driver can be overriden.

By default, this value is `false` and the default driver as configured in `Neos.Imagine` is used.

Possible values are `Gd`, `Imagick`, `Gmagick` or `Vips`.



```yaml

Sitegeist:

  Kaleidoscope:

    dummyImage:

      overrideImagineDriver: 'Imagick'

```



## Usage



## Image/Picture FusionObjects



The Kaleidoscope package integrates two main fusion-objects that an render

the given ImageSource as `img`- or `picture`-tag.



### `Sitegeist.Kaleidoscope:Image`



Render an `img`-tag with optional `srcset` based on `sizes` or `resolutions`.



Props:



- `imageSource`: the imageSource to render

- `srcset`: media descriptors like '1.5x' or '600w' of the default image (string ot array)

- `sizes`: sizes attribute of the default image (string ot array)

- `loading`: (optional, default "lazy") loading attribute for the img tag

- `format`: (optional) the image-format like `webp` or `png`, will be applied to the `imageSource`

- `quality`: (optional) the image quality from 0 to 100, will be applied to the `imageSource`

- `width`: (optional) the base width, will be applied to the `imageSource`

- `height`: (optional) the base height, will be applied to the `imageSource`

- `alt`: alt-attribute for the img tag (default "")

- `title`: title attribute for the img tag

- `class`: class attribute for the img tag (deprecated in favor of attributes.class)

- `attributes`: tag-attributes, will override any automatically rendered ones

- `renderDimensionAttributes`: render dimension attributes (width/height) when the data is available from the imageSource. Enabled by default



#### Image with srcset in multiple resolutions:



```

imageSource = Sitegeist.Kaleidoscope:DummyImageSource



renderer = afx`

    

`

```



#### Image with srcset in multiple sizes:



```

imageSource = Sitegeist.Kaleidoscope:DummyImageSource



renderer = afx`

    

`

```



### `Sitegeist.Kaleidoscope:Picture`



Render a `picture`-tag with various sources.



Props:

- `imageSource`: the imageSource to render

- `sources`: an array of source definitions that supports the following keys

   - `imageSource`: alternate image-source for art direction purpose

   - `srcset`: (optional) media descriptors like '1.5x' or '600w' (string ot array)

   - `sizes`: (optional) sizes attribute (string or array)

   - `media`: (optional) the media attribute for this source

   - `type`: (optional) the type attribute for this source

   - `format`: (optional) the image-format for the source like `webp` or `png`, is applied to `imageSource` and `type`

   - `quality`: (optional) the image quality from 0 to 100, will be applied to the `imageSource`

   - `width`: (optional) the base width, will be applied to the `imageSource`

   - `height`: (optional) the base height, will be applied to the `imageSource`

- `srcset`: media descriptors like '1.5x' or '600w' of the default image (string ot array)

- `sizes`: sizes attribute of the default image (string ot array)

- `formats`: (optional) image formats that will be rendered as sources of separate type (string or array)

- `quality`: (optional) the image quality from 0 to 100, will be applied to the `imageSource`

- `width`: (optional) the base width, will be applied to the `imageSource`

- `height`: (optional) the base height, will be applied to the `imageSource`

- `loading`: (optional, default "lazy") loading attribute for the img tag

- `alt`: alt-attribute for the img tag

- `title`: title attribute for the img tag

- `attributes`: picture-tag-attributes, will override any automatically rendered ones

- `imgAttributes`: img-tag-attributes, will override any automatically rendered ones

- `class`: class attribute for the picture tag (deprecated in favor of attributes.class)

- `renderDimensionAttributes`: render dimension attributes (width/height) for the img-tag when the data is available from the imageSource

  if not specified renderDimensionAttributes will be enabled automatically for pictures that only use the `formats` options.



#### Picture multiple formats:



The following code will render a picture with an img-tag and two additional

source-tags for the formats webp and png in addition to the default img.



```

imageSource = Sitegeist.Kaleidoscope:DummyImageSource



renderer = afx`

    

        

        

        

    

`

```



### `Sitegeist.Kaleidoscope:Source`



Render an `src`-tag with `srcset`, `sizes`, `type` and `media` attributes.



Props:



- `imageSource`: the imageSource to render (inherited from picture)

- `srcset`: media descriptors like '1.5x' or '600w' of the default image (string ot array, inherited from picture)

- `sizes`: (optional) sizes attribute (string or array, inherited from picture)

- `format`: (optional) the image-format like `webp` or `png`, will be applied to `imageSource` and `type`

- `quality`: (optional) the image quality from 0 to 100, will be applied to the `imageSource`

- `width`: (optional) the base width, will be applied to the `imageSource`

- `height`: (optional) the base height, will be applied to the `imageSource`

- `type`: (optional) the type attribute for the source like `image/png` or `image/webp`, the actual format is enforced via `imageSource.withFormat()`

- `media`: (optional) the media query for the given source

- `renderDimensionAttributes`: render dimension attributes (width/height) for the source-tag when the data is available from the imageSource

  if not specified renderDimensionAttributes will be enabled automatically.



## Responsive Images with AtomicFusion-Components and Sitegeist.Monocle



```

prototype (Vendor.Site:Component.ResponsiveKevisualImage) < prototype(Neos.Fusion:Component) {



    #

    # Use the DummyImageSource inside the styleguide

    #

    @styleguide {

        props {

            imageSource = Sitegeist.Kaleidoscope:DummyImageSource

        }

    }



    #

    # Enforce the dimensions of the passed images by cropping to 1600 x 800

    #

    imageSource = null

    [email protected] = ${value ? value.withWidth(1600).withHeight(900) : null}



    renderer = afx`

        

    `

}

```



Please note that the enforced dimensions are applied in the presentational component.

The dimension enforcement is applied to the DummySource aswell as to the AssetSource

which will be defined by the integration.



The integration of the component above as content-element works like this:



```

prototype (Vendor.Site:Content.ResponsiveKevisual) < prototype(Neos.Neos:ContentComponent) {

    renderer = Vendor.Site:Component.ResponsiveKevisualImage {

        imageSource = Sitegeist.Kaleidoscope:AssetImageSource {

            asset = ${q(node).property('image')}

            title = ${q(node).property('title')}

            alt = ${q(node).property('alternativeText')}

        }

    }

}

```



This shows that integration-code dos not need to know the required image dimensions or wich

variants are needed. This frontend know-how is now encapsulated into the presentational-component.



## Dynamically enable/disable the lazy rendering



To optimize the initial load time lazy loading should be disabled for the first contents but be

enabled for others. This can be implemented by enabling the `lazy`ness in the ContentCase prototype

depending on whether or not the current node is the first content in the main collection.



```

renderer = Neos.Neos:ContentCollection {

    nodePath = 'main'



    // configure seperate iterator for main content

    content.iterationName = 'mainContentIterator'



    // enable lazynes for first items

    prototype(Sitegeist.Kaleidoscope:Image) {

        loading = ${mainContentIterator.isFirst ? 'eager' : 'lazy'}

    }

    prototype(Sitegeist.Kaleidoscope:Picture) {

        loading = ${mainContentIterator.isFirst ? 'eager' : 'lazy'}

    }

}

```



## ImageSource FusionObjects



The package contains ImageSource-FusionObjects that encapsulate the intention to

render an image. ImageSource-Objects return Eel-Helpers that allow to

enforcing the rendered dimensions later in the rendering process.



Note: The settings for `width`, `height`, `thumbnailPreset` and `variantPreset` can be defined

via fusion but can also applied to the returned object which will override the fusion-settings.



### `Sitegeist.Kaleidoscope:AssetImageSource`



Arguments:



- `asset`: An image asset that shall be rendered (defaults to the context value `asset`)

- `async`: Defer image-rendering until the image is actually requested by the browser (default true)

- `thumbnailPreset`: `width` and `height` are supported as explained above

- `variantPreset`: as explained above

- `format`: Set the image output format, like webp (default null)

- `quality`: Set the image quality from 0 to 100 (default null)

- `alt`: The alt attribute if not specified otherwise (default null)

- `title`: The title attribute if not specified otherwise (default null)



### `Sitegeist.Kaleidoscope:DummyImageSource`






Arguments:

- `baseWidth`: The default width for the image before scaling (default = 600)

- `baseHeight`: The default height for the image before scaling (default = 400)

- `backgroundColor`: The background color of the dummy image (default = '999')

- `foregroundColor`: The foreground color of the dummy image (default = 'fff')

- `text`: The text that is rendered on the image (default = null, show size)

- `thumbnailPreset`: `width` and `height` are supported as explained above

- `variantPreset`: as explained above

- `alt`: The alt attribute if not specified otherwise (default null)

- `title`: The title attribute if not specified otherwise (default null)



### `Sitegeist.Kaleidoscope:UriImageSource`



Arguments:

- `uri`: The uri that will be rendered

- `alt`: The alt attribute if not specified otherwise (default null)

- `title`: The title attribute if not specified otherwise (default null)

-

### `Sitegeist.Kaleidoscope:ResourceImageSource`



Arguments:

- `package`: The package key (e.g. `'My.Package'`) (default = false)

- `path`: Path to resource, either a path relative to `Public` and `package` or a `resource://` URI (default = null)

- !!! `thumbnailPreset`: `width` and `height` have no effect on this ImageSource

- !!! `variantPreset`: has no effect on this ImageSource



## ImageSource Eel-Helpers



The ImageSource-helpers are created by the fusion-objects above and are passed to a

rendering component. The helpers allow to set or override the intended

dimensions and to render the `src` and `srcset`-attributes.



Methods of ImageSource-Helpers that are accessible via Eel:



- `withWidth( integer $width, bool $preserveAspect = false )`: Set the intend width modify height as well if

- `withHeight( integer $height, bool $preserveAspect = false )`: Set the intended height

- `withDimensions( integer, interger)`: Set the intended width and height

- `withThumbnailPreset( string )`: Set width and/or height via named thumbnail preset from Settings `Neos.Media.thumbnailPresets`

- `withVariantPreset( string, string )`: Select image variant via the named variant preset (parameters are "preset identifier" key and "preset variant name" key from Settings `Neos.Media.variantPresets`)

- `withFormat( string )`: Set the image format to generate like  `webp`, `png` or `jpeg`

- `withQuality( integer )`: Set the image quality from 0 to 100

- `withAlt( ?string )`: Set the alt atttribute for the image tag

- `withTitle( ?string )`: Set the title atttribute for the image tag



- `src()`: Render a src attribute for the given ImageSource-object

- `srcset( array of descriptors )`: render a srcset attribute for the ImageSource with given media descriptors like `2.x` or `800w`

- `width()`: The current width of the ImageSource if available

- `height()`: The current height of the ImageSource if available

- `alt()`: The alt value of the ImageSource if available

- `title()`: The title value of the ImageSource if available



deprecated methods:



- `applyThumbnailPreset( string )`: Set width and/or height via named thumbnail preset from Settings `Neos.Media.thumbnailPresets`

- `useVariantPreset( string, string )`: Select image variant via the named variant preset (parameters are "preset identifier" key and "preset variant name" key from Settings `Neos.Media.variantPresets`)

- `setWidth( integer $width, bool $preserveAspect = false )`: Set the intend width modify height as well if

- `setHeight( integer $height, bool $preserveAspect = false )`: Set the intended height

- `setDimensions( integer, interger)`: Set the intended width and height

- `setFormat( string )`: Set the image format to generate like  `webp`, `png` or `jpeg`

- `setQuality( integer )`: Set the image quality from 0 to 100



Note: The Eel-helpers cannot be created directly. They have to be created

by using the `Sitegeist.Kaleidoscope:AssetImageSource` or

`Sitegeist.Kaleidoscope:DummyImageSource` fusion-objects.



### Examples



Render an `img`-tag with `src` and a `srcset` in multiple resolutions:



```

    imageSource = Sitegeist.Kaleidoscope:DummyImageSource

    renderer = afx`

        

    `

```



Render an `img`-tag with `src` plus `srcset` and `sizes`:



```

    imageSource = Sitegeist.Kaleidoscope:DummyImageSource

    renderer = afx`

        

    `

```

Render a `picture`-tag with multiple `source`-children and an `img`-fallback :



```

    imageSource = Sitegeist.Kaleidoscope:DummyImageSource

    renderer = afx`

        

            

            

            

        

    `

```



In this example devices smaller than 800px will show a square image,

while larger devices will render a multires-source in the original image dimension.



## Contribution



We will gladly accept contributions. Please send us pull requests.