328 lines
13 KiB
Text
328 lines
13 KiB
Text
[[_themes]]
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== Themes
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{project_name} provides theme support for web pages and emails. This allows customizing the look and feel of end-user facing pages so they can be
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integrated with your applications.
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image::images/login-sunrise.png[caption="",title="Login page with sunrise example theme"]
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=== Theme Types
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A theme can provide one or more types to customize different aspects of {project_name}. The types available are:
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* Account - Account management
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* Admin - Admin console
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* Email - Emails
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* Login - Login forms
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* Welcome - Welcome page
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=== Configure Theme
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All theme types, except welcome, are configured through the `Admin Console`. To change the theme used for a realm open the `Admin Console`, select
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your realm from the drop-down box in the top left corner. Under `Realm Settings` click `Themes`.
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NOTE: To set the theme for the `master` admin console you need to set the admin console theme for the `master` realm. To see the changes to the admin console
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refresh the page.
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To change the welcome theme you need to edit `standalone.xml`, `standalone-ha.xml`, or `domain.xml`.
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For more information on where these files reside see the link:{installguide_link}[{installguide_name}].
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Add `welcomeTheme` to the theme element, for example:
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[source,xml]
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----
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<theme>
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...
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<welcomeTheme>custom-theme</welcomeTheme>
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...
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</theme>
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----
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If the server is running you need to restart the server for the changes to the welcome theme to take effect.
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=== Default Themes
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{project_name} comes bundled with default themes in the server's root `themes` directory. To simplify upgrading you should not edit the bundled themes
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directly. Instead create your own theme that extends one of the bundled themes.
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=== Creating a Theme
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A theme consists of:
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* HTML templates (https://freemarker.apache.org/[Freemarker Templates])
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* Images
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* Message bundles
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* Stylesheets
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* Scripts
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* Theme properties
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Unless you plan to replace every single page you should extend another theme. Most likely you will want to extend the {project_name} theme, but you could also
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consider extending the base theme if you are significantly changing the look and feel of the pages. The base theme primarily consists of HTML templates and
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message bundles, while the {project_name} theme primarily contains images and stylesheets.
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When extending a theme you can override individual resources (templates, stylesheets, etc.). If you decide to override HTML templates bear in mind that you may
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need to update your custom template when upgrading to a new release.
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While creating a theme it's a good idea to disable caching as this makes it possible to edit theme resources directly from the `themes` directory without
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restarting {project_name}. To do this edit `standalone.xml`. For `theme` set `staticMaxAge` to `-1` and both
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`cacheTemplates` and `cacheThemes` to `false`:
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[source,xml]
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----
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<theme>
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<staticMaxAge>-1</staticMaxAge>
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<cacheThemes>false</cacheThemes>
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<cacheTemplates>false</cacheTemplates>
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...
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</theme>
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----
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Remember to re-enable caching in production as it will significantly impact performance.
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To create a new theme start by creating a new directory in the `themes` directory. The name of the directory becomes the name of the theme. For example to
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create a theme called `mytheme` create the directory `themes/mytheme`.
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Inside the theme directory create a directory for each of the types your theme is going to provide. For example to add the login type to the `mytheme`
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theme create the directory `themes/mytheme/login`.
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For each type create a file `theme.properties` which allows setting some configuration for the theme. For example to configure the theme `themes/mytheme/login`
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that we just created to extend the base theme and import some common resources create the file `themes/mytheme/login/theme.properties` with following contents:
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[source]
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----
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parent=base
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import=common/keycloak
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----
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You have now created a theme with support for the login type. To check that it works open the admin console. Select your realm and click on `Themes`.
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For `Login Theme` select `mytheme` and click `Save`. Then open the login page for the realm.
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You can do this either by login through your application or by opening the Account Management console (`/realms/{realm name}/account`).
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To see the effect of changing the parent theme, set `parent=keycloak` in `theme.properties` and refresh the login page.
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==== Theme Properties
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Theme properties are set in the file `<THEME TYPE>/theme.properties` in the theme directory.
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* parent - Parent theme to extend
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* import - Import resources from another theme
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* styles - Space-separated list of styles to include
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* locales - Comma-separated list of supported locales
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There are a list of properties that can be used to change the css class used for certain element types. For a list of these properties look at the theme.properties
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file in the corresponding type of the keycloak theme (`themes/keycloak/<THEME TYPE>/theme.properties`).
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You can also add your own custom properties and use them from custom templates.
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==== Stylesheets
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A theme can have one or more stylesheets. To add a stylesheet create a file in the `<THEME TYPE>/resources/css` directory of your theme. Then add it to the `styles`
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property in `theme.properties`.
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For example to add `styles.css` to the `mytheme` create `themes/mytheme/login/resources/css/styles.css` with the following content:
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[source,css]
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----
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.login-pf body {
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background: DimGrey none;
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}
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----
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Then edit `themes/mytheme/login/theme.properties` and add:
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[source]
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----
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styles=css/styles.css
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----
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To see the changes open the login page for your realm. You will notice that the only styles being applied are those from your custom stylesheet. To include the
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styles from the parent theme you need to load the styles from that theme as well. Do this by editing `themes/mytheme/login/theme.properties` and changing `styles`
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to:
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[source]
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----
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styles=node_modules/patternfly/dist/css/patternfly.css node_modules/patternfly/dist/css/patternfly-additions.css lib/zocial/zocial.css css/login.css css/styles.css
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----
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NOTE: To override styles from the parent stylesheets it's important that your stylesheet is listed last.
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==== Scripts
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A theme can have one or more scripts, to add a script create a file in the `<THEME TYPE>/resources/js` directory of your theme. Then add it to the `scripts`
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property in `theme.properties`.
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For example to add `script.js` to the `mytheme` create `themes/mytheme/login/resources/js/script.js` with the following content:
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[source,javascript]
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----
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alert('Hello');
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----
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Then edit `themes/mytheme/login/theme.properties` and add:
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[source]
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----
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scripts=js/script.js
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----
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==== Images
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To make images available to the theme add them to the `<THEME TYPE>/resources/img` directory of your theme. These can be used from within stylesheets or
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directly in HTML templates.
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For example to add an image to the `mytheme` copy an image to `themes/mytheme/login/resources/img/image.jpg`.
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You can then use this image from within a custom stylesheet with:
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[source,css]
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----
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body {
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background-image: url('../img/image.jpg');
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background-size: cover;
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}
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----
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Or to use directly in HTML templates add the following to a custom HTML template:
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[source,html]
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----
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<img src="${url.resourcesPath}/img/image.jpg">
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----
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==== Messages
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Text in the templates is loaded from message bundles. A theme that extends another theme will inherit all messages from the parent's message bundle and you can
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override individual messages by adding `<THEME TYPE>/messages/messages_en.properties` to your theme.
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For example to replace `Username` on the login form with `Your Username` for the `mytheme` create the file
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`themes/mytheme/login/messages/messages_en.properties` with the following content:
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[source]
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----
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usernameOrEmail=Your Username
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----
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Within a message values like `{0}` and `{1}` are replaced with arguments when the message is used. For example {0} in `Log in to {0}` is replaced with the name
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of the realm.
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==== Internationalization
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{project_name} supports internationalization. To enable internationalization for a realm see {adminguide_link}[{adminguide_name}]. This
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section describes how you can add your own language.
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To add a new language create the file `<THEME TYPE>/messages/messages_<LOCALE>.properties` in the directory of your theme. Then add it to the `locales` property in
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`<THEME TYPE>/theme.properties`. For a language to be available to users the realms `login`, `account` and `email` theme has to support the language, so you
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need to add your language for those theme types.
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For example, to add Norwegian translations to the `mytheme` theme create the file `themes/mytheme/login/messages/messages_no.properties` with the
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following content:
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[source]
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----
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usernameOrEmail=Brukernavn
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password=Passord
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----
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All messages you don't provide a translation for will use the default English translation.
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Then edit `themes/mytheme/login/theme.properties` and add:
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[source]
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----
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locales=en,no
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----
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You also need to do the same for the `account` and `email` theme types. To do this create `themes/mytheme/account/messages/messages_no.properties` and
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`themes/mytheme/email/messages/messages_no.properties`. Leaving these files empty will result in the English messages being used. Then copy
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`themes/mytheme/login/theme.properties` to `themes/mytheme/account/theme.properties` and `themes/mytheme/email/theme.properties`.
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Finally you need to add a translation for the language selector. This is done by adding a message to the English translation. To do this add the following to
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`themes/mytheme/account/messages/messages_en.properties` and `themes/mytheme/login/messages/messages_en.properties`:
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[source]
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----
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locale_no=Norsk
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----
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By default message properties files should be encoded using ISO-8859-1. It's also possible to specify the encoding using a special header. For example to use UTF-8 encoding:
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[source]
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----
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# encoding: UTF-8
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usernameOrEmail=....
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----
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See <<_locale_selector,Locale Selector>> on details on how the current locale is selected.
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==== HTML Templates
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{project_name} uses https://freemarker.apache.org/[Freemarker Templates] in order to generate HTML. You can override individual templates in your own theme by
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creating `<THEME TYPE>/<TEMPLATE>.ftl`. For a list of templates used see `themes/base/<THEME TYPE>`.
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When creating a custom template it is a good idea to copy the template from the base theme to your own theme, then applying the modifications you need. Bear in
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mind when upgrading to a new version of {project_name} you may need to update your custom templates to apply changes to the original template if
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applicable.
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For example to create a custom login form for the `mytheme` theme copy `themes/base/login/login.ftl` to `themes/mytheme/login` and open it in an editor.
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After the first line (<#import ...>) add `<h1>HELLO WORLD!</h1>` like so:
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[source,html]
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----
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<#import "template.ftl" as layout>
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<h1>HELLO WORLD!</h1>
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...
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----
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Check out the https://freemarker.apache.org/docs/index.html[FreeMarker Manual] for more details on how to edit templates.
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==== Emails
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To edit the subject and contents for emails, for example password recovery email, add a message bundle to the `email` type of your theme. There are three messages for each email. One for the subject, one for the plain text body and one for the html body.
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To see all emails available take a look at `themes/base/email/messages/messages_en.properties`.
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For example to change the password recovery email for the `mytheme` theme create `themes/mytheme/email/messages/messages_en.properties` with the following
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content:
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[source]
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----
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passwordResetSubject=My password recovery
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passwordResetBody=Reset password link: {0}
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passwordResetBodyHtml=<a href="{0}">Reset password</a>
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----
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=== Deploying Themes
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Themes can be deployed to {project_name} by copying the theme directory to `themes` or it can be deployed as an archive. During development you can copy the
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theme to the `themes` directory, but in production you may want to consider using an `archive`. An `archive` makes it simpler to have a versioned copy of
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the theme, especially when you have multiple instances of {project_name} for example with clustering.
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To deploy a theme as an archive you need to create a JAR archive with the theme resources. You also need to add a file `META-INF/keycloak-themes.json` to the
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archive that lists the available themes in the archive as well as what types each theme provides.
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For example for the `mytheme` theme create `mytheme.jar` with the contents:
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* META-INF/keycloak-themes.json
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* theme/mytheme/login/theme.properties
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* theme/mytheme/login/login.ftl
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* theme/mytheme/login/resources/css/styles.css
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* theme/mytheme/login/resources/img/image.png
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* theme/mytheme/login/messages/messages_en.properties
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* theme/mytheme/email/messages/messages_en.properties
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The contents of `META-INF/keycloak-themes.json` in this case would be:
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[source,json]
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----
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{
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"themes": [{
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"name" : "mytheme",
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"types": [ "login", "email" ]
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}]
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}
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----
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A single archive can contain multiple themes and each theme can support one or more types.
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To deploy the archive to {project_name} simply drop it into the `standalone/deployments/` directory of
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{project_name} and it will be automatically loaded.
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