Theme
A theme is a collection of resource files that gives a site its visual identity through the use of colors and typography. A theme consists of Cascading Style Sheets (CSS), Javascript files and an imaging configuration which tells the Imaging module what to do with images for a particular page or component.
When to use a theme
The Site module provides theme functionality. You can only create a theme if you use this module and have configured a site definition.
Themes and modules
Theme resources can be stored in light (YAML) or Maven modules. Themes can reside in a dedicated theme module or form part of another module. A special module version handler is not necessary.
Resource loading
All Magnolia resources, including theme
resources, are loaded under the /.resources
(dot resources
) path.
-
In a Maven module the resources are located in
/src/main/resources/<moduleName>
and any subfolder. -
In a light module resources can be located any subfolder of your module, for example,
/<moduleName>/webresources/
Theme resources can also be loaded from an external source by specifying the full URL. This is very useful if you use a CDN to store, cache and deliver your static resources.
See Resources and Module structure for more.
Benefits of using a theme
Themes offer a number of benefits:
-
Theme resources are applied to the entire site.
-
Resources are all in one place.
-
Themes are an easy way to work with resources without having to modify the head section of your HTML
-
You can define more than one theme and switch between them, or apply a different theme to a variation of your site. For example, you could use a different theme for pages targeted at U.S. users and European users, or a seasonal theme for different times of the year.
-
You can still use different or additional overriding resources on a page-template level.
Configuring a theme
Where to configure a theme
Themes can be configured:
-
In any module.
-
In YAML on the file system or in the JCR.
Example
travel-demo-theme
in travel-demo/themes/travel-demo-theme.yaml
.
travel-demo/themes/travel-demo-theme.yaml
cssFiles:
#CSS files configuration
jsFiles:
#JavaScript files configuration
imaging:
#Imaging variations configuration
Three configuration nodes define the individual elements of a theme:
travel-demo-theme
Property | Description |
---|---|
|
Optional References CSS files. |
|
Optional References JavaScript files. |
|
Optional Defines Image variations a.k.a renditions. |
CSS files
Links to CSS resources are configured in the cssFiles
node of the
theme.
CSS defines the presentation semantics of an HTML document, and creates the look and feel of the site.
Example: cssFiles
configuration in travel-demo-theme
in
travel-demo/themes/travel-demo-theme.yaml
.
travel-demo/themes/travel-demo-theme.yaml
cssFiles:
bootstrap:
addFingerPrint: true
link: /.resources/travel-demo-theme/libs/twitterbootstrap/css/bootstrap.min.css
media: all
roboto-condensed:
addFingerPrint: true
link: https://fonts.googleapis.com/css?family=Roboto-Condensed:400,300,700
media: all
slick:
addFingerPrint: true
link: /.resources/travel-demo-theme/libs/slick-carousel/css/slick.css
media: all
slick-theme:
addFingerPrint: true
link: /.resources/travel-demo-theme/libs/slick-carousel/css/slick-theme.css
media: all
travels-magnolia:
addFingerPrint: true
link: /.resources/travel-demo-theme/css/travels-magnolia.css
media: all
video:
addFingerPrint: true
link: /.resources/mtk/css/video.css
media: all
jsFiles:
#JavaScript files configuration
imaging:
#Imaging variations configuration
Property | Description |
---|---|
|
optional CSS node of the theme. |
|
required Arbitrary node name. Add a node for each sheet. |
|
optional Embeds a file content fingerprint in the resource URL. The fingerprint
consists of a timestamp in the |
|
required Path to the CSS file that is added to the HTML. See Adding style to HTML for more. See also Web resources and Origins and loading order for different options for storing and loading resources. |
|
optional Media associated with the linked CSS file. If you use a responsive web
design framework like Bootstrap or
Foundation set this property to |
|
optional Defines the conditional
comment attribute for the linked CSS file. Conditional comments are
used to overcome the limitations of legacy browsers such as Internet
Explorer 9 and earlier. For example, the conditional comment "
|
This simple theme example uses only the default Bootstrap minimized CSS with no customizations.
JavaScript files
Links to JavaScripts are configured in the jsFiles
node of the theme.
JavaScript is responsible for client-side functionality such as carousel paging, AJAX, menu animations, trees, embedded video player, mouse wheel support, Google Analytics and much more.
Example: jsFiles
configuration in travel-demo-theme
in
travel-demo/themes/travel-demo-theme.yaml
.
travel-demo/themes/travel-demo-theme.yaml
cssFiles:
#CSS files configuration
jsFiles:
respimage:
addFingerPrint: true
link: /.resources/travel-demo-theme/libs/lazysizes/respimage.min.js
lazysizes:
addFingerPrint: true
link: /.resources/travel-demo-theme/libs/lazysizes/lazysizes.min.js
modernizr:
addFingerPrint: true
link: /.resources/travel-demo-theme/js/modernizr-2.6.2.min.js
jquery:
addFingerPrint: true
link: /.resources/travel-demo-theme/js/jquery-1.10.2.min.js
js.cookies:
addFingerPrint: true
link: /.resources/travel-demo-theme/js/js.cookies-2.1.2.js
jquery.object-fit-cover-simple:
addFingerPrint: true
link: /.resources/travel-demo-theme/js/jquery.object-fit-cover-simple.js
slick:
addFingerPrint: true
link: /.resources/travel-demo-theme/libs/slick-carousel/js/slick.min.js
addtoany:
link: https://static.addtoany.com/menu/page.js
imaging:
#Imaging variations configuration
Property | Description |
---|---|
|
optional JavaScript node of the theme. |
|
required Arbitrary node name. Add a node for each JavaScript file. |
|
optional Embeds a file content fingerprint in the resource URL. The fingerprint
consists of a timestamp in the |
|
required Path to the JavaScript file. See Web resources and Origins and loading order for different options for storing and loading resources. Here’s an example JavaScript alert box using JQuery and the default Bootstrap minimized CSS. |
Image variations
Themes can make use of the Imaging module to preconfigure image variations. A variation is a specific configuration that defines features of a target image. Variations can range from complex operations, such as applying filters and overlays, to simple resizing of the target image.
Variations are an effective alternative to resizing images with CSS:
-
Image size is reduced and less data transferred.
-
Editors can upload images of any size which will automatically be resized to fit the template.
-
Image sizes are uniform throughout the site.
Variations are configured in the imaging
node of the theme.
Example: imaging
configuration in travel-demo-theme
in
travel-demo/themes/travel-demo-theme.yaml
.
travel-demo/themes/travel-demo-theme.yaml
cssFiles:
#CSS files configuration
jsFiles:
#JavaScript files configuration
imaging:
class: info.magnolia.templating.imaging.VariationAwareImagingSupport
variations:
"1600":
class: info.magnolia.templating.imaging.variation.SimpleResizeVariation
width: 1600
"1366":
class: info.magnolia.templating.imaging.variation.SimpleResizeVariation
width: 1366
#......
"240":
class: info.magnolia.templating.imaging.variation.SimpleResizeVariation
width: 240
"1600x1200":
class: info.magnolia.templating.imaging.variation.SimpleResizeVariation
height: 1200
width: 1600
"1366x1024":
class: info.magnolia.templating.imaging.variation.SimpleResizeVariation
height: 1024
width: 1366
#.....
"240x180":
class: info.magnolia.templating.imaging.variation.SimpleResizeVariation
height: 180
width: 240
Property | Description |
---|---|
|
optional Imaging node of the theme. |
|
required Image variations node. |
|
required The name of the variation, a.k.a the rendition name. The name is used to call the variation in template scripts. Add one node for every variation. |
|
required You can use one of the available classes or create a custom one. The available properties depend on the class used for the variation. Any custom class must implement Variation. MTE module provides SimpleResizeVariation that resizes images to a defined size in pixels (see below for available properties).
Add properties that are supported by the class used. |
|
required VariationAwareImagingSupport provides support for variations. |
|
optional Enables and disables variation support. |
Configuring a simple resize
The SimpleResizeVariation
class is suitable for most resize
variations. It resizes the original image to a defined size in pixels.
Property |
Description
|
|
required
|
|
optional, default is Whether cropping is allowed. |
|
optional An integer that defines the height in pixels. |
|
optional An integer that defines the width in pixels. Behavior:
|
See damfn and How to work with images using damfn for how to use variations in your scripts. |
Assigning a theme to a site
Themes are assigned to a site in the theme
node of the
site definition in the
Site app.
Example: Travel Demo Site Definition (CE)
Property | Description |
---|---|
|
required Theme node. |
|
required The value of this property must match the name of the theme
configured in |
Using theme resources in template scripts
Theme resources are typically added to the <head>
element of a page
template.
-
Retrieve the configured theme configured over the sitefn function class:
[#assign site = sitefn.site()!] [#assign theme = sitefn.theme(site)!]
-
Iterate over the theme configuration and include the configured resources:
[#list theme.cssFiles as cssFile] <link rel="stylesheet" href="${cssFile.link}" media="${cssFile.media}" /> [/#list] [#list theme.jsFiles as jsFile] <script src="${jsFile.link}"></script> [/#list]
Viewing and editing themes
Theme definitions from all sources and origins are available in the
Definitions app. Select
themes
in Type to find all theme definitions. You can hotfix themes
in the Resource Files app.
Select the theme definition and click Show in Resources app in the
Definitions app to access the file.
Example: travel-demo-theme in Definitions app and Resource Files app.