Changes between Version 1 and Version 2 of TracInterfaceCustomization


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Timestamp:
Aug 22, 2019, 8:54:20 AM (5 years ago)
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trac
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  • TracInterfaceCustomization

    v1 v2  
    1 = Customizing the Trac Interface =
     1= Customizing the Trac Interface
    22[[TracGuideToc]]
     3[[PageOutline(2-5,Contents,pullout)]]
    34
    4 == Introduction ==
    5 This page is meant to give users suggestions on how they can customize the look of Trac.  Topics on this page cover editing the HTML templates and CSS files, but not the program code itself.  The topics are intended to show users how they can modify the look of Trac to meet their specific needs.  Suggestions for changes to Trac's interface applicable to all users should be filed as tickets, not listed on this page.
     5This page gives suggestions on how to customize the look of Trac. Topics include editing the HTML templates and CSS files, but not the program code itself. The topics show users how they can modify the look of Trac to meet their specific needs. Suggestions for changes to Trac's interface applicable to all users should be filed as tickets, not listed on this page.
    66
    7 == Project Logo and Icon ==
    8 The easiest parts of the Trac interface to customize are the logo and the site icon.  Both of these can be configured with settings in [wiki:TracIni trac.ini].
     7== Project Logo and Icon
     8The easiest parts of the Trac interface to customize are the logo and the site icon. Both of these can be configured with settings in [TracIni#project-section trac.ini].
    99
    10 The logo or icon image should be put in a folder named "htdocs" in your project's environment folder.  (''Note: in projects created with a Trac version prior to 0.9 you will need to create this folder'')
     10The logo or icon image should be put your environment's `htdocs` directory. You can actually put the logo and icon anywhere on your server (as long as it's accessible through the web server), and use their absolute or server-relative URLs in the configuration.
    1111
    12  ''Note: you can actually put the logo and icon anywhere on your server (as long as it's accessible through the web server), and use their absolute or server-relative URLs in the configuration.''
     12Next, configure the appropriate section of your trac.ini:
    1313
    14 Now configure the appropriate section of your [wiki:TracIni trac.ini]:
     14=== Logo
     15Change the `src` setting to `site/` followed by the name of your image file. The `width` and `height` settings should be modified to match your image's dimensions. The Trac chrome handler uses `site/` for files within the project directory `htdocs`, and `common/` for the common `htdocs` directory belonging to a Trac installation. Note that `site/` is not a placeholder for your project name, it is the literal prefix. For example, if your project is named `sandbox`, and the image file is `red_logo.gif` then the `src` setting would be `site/red_logo.gif`, not `sandbox/red_logo.gif`.
    1516
    16 === Logo ===
    17 Change the `src` setting to `site/` followed by the name of your image file.  The `width` and `height` settings should be modified to match your image's dimensions (the Trac chrome handler uses "`site/`" for files within the project directory `htdocs` and "`common/`" for the common ones).
    18 
    19 {{{
     17{{{#!ini
    2018[header_logo]
    2119src = site/my_logo.gif
    … …  
    2523}}}
    2624
    27 === Icon ===
    28 Icons should be a 16x16 image in `.gif` or `.ico` format.  Change the `icon` setting to `site/` followed by the name of your icon file.  Icons will typically be displayed by your web browser next to the site's URL and in the `Bookmarks` menu.
     25=== Icon
     26Icons are small images displayed by your web browser next to the site's URL and in the `Bookmarks` menu. Icons should be a 32x32 image in `.gif` or `.ico` format. Change the `icon` setting to `site/` followed by the name of your icon file:
    2927
    30 {{{
     28{{{#!ini
    3129[project]
    3230icon = site/my_icon.ico
    3331}}}
    3432
    35 Note though that this icon is ignored by Internet Explorer, which only accepts a file named ``favicon.ico`` at the root of the host. To make the project icon work in both IE and other browsers, you can store the icon in the document root of the host, and reference it from ``trac.ini`` as follows:
     33== Custom Navigation Entries
     34The `[mainnav]` and `[metanav]` sections of trac.ini be used to customize the navigation items' text and link, or even disable them, but not for adding new ones.
    3635
    37 {{{
    38 [project]
    39 icon = /favicon.ico
     36In the following example, we rename the link to the Wiki start "Home", and hide the "!Help/Guide". We also make the "View Tickets" entry link to a specific report:
     37{{{#!ini
     38[mainnav]
     39wiki.label = Home
     40tickets.href = /report/24
     41
     42[metanav]
     43help = disabled
    4044}}}
    4145
    42 == Site Header & Footer ==
     46See also TracNavigation for a more detailed explanation of the mainnav and metanav navigation.
    4347
    44 In the environment folder for each Trac project there should be a directory called {{{templates}}}.  This folder contains files {{{site_header.cs}}} and {{{site_footer.cs}}}.  Users can customize their Trac site by adding the required HTML markup to these files.  The content of these two files will be placed immediately following the opening {{{<body>}}} tag and immediately preceding the closing {{{</body>}}} tag of each page in the site, respectively.
     48== Site Appearance #SiteAppearance
    4549
    46 These files may contain static HTML, though if users desire to have dynamically generated content they can make use of the [http://www.clearsilver.net/ ClearSilver] templating language from within the pages as well. When you need to see what variables are available to the template, append the query string `?hdfdump=1` to the URL of your Trac site. This will display a structured view of the template data.
     50Trac is using [https://genshi.edgewall.org Genshi] as the templating engine. Say you want to add a link to a custom stylesheet, and then your own header and footer. Save the following content as `site.html` inside your projects `templates/` directory (each Trac project can have their own `site.html`), eg `/path/to/env/templates/site.html`:
    4751
    48 == Site CSS ==
    49 The primary means to adjust the layout of a Trac site is to add [http://www.w3.org/TR/REC-CSS2/ CSS] style rules that overlay the default rules. This is best done by editing the `site_css.cs` file in the enviroment's `templates` directory. The content of that template gets inserted into a `<style type="text/css"></style>` element on every HTML page generated by Trac.
     52{{{#!xml
     53<html xmlns="http://www.w3.org/1999/xhtml"
     54      xmlns:py="http://genshi.edgewall.org/"
     55      py:strip="">
    5056
    51 While you can add your custom style rules directly to the `site_css.cs` file, it is recommended that you simply reference an external style sheet, thereby enabling browsers to cache the CSS file instead of transmitting the rules with every response.
     57  <!--! Add site-specific style sheet -->
     58  <head py:match="head" py:attrs="select('@*')">
     59    ${select('*|comment()|text()')}
     60    <link rel="stylesheet" href="${href.chrome('site/style.css')}" />
     61  </head>
    5262
    53 The following example would import a style sheet located in the `style` root directory of your host:
    54 {{{
    55 @import url(/style/mytrac.css);
     63  <body py:match="body" py:attrs="select('@*')">
     64    <!--! Add site-specific header -->
     65    <div id="siteheader">
     66      <!--! Place your header content here... -->
     67    </div>
     68
     69    ${select('*|text()')}
     70
     71    <!--! Add site-specific footer -->
     72    <div id="sitefooter">
     73      <!--! Place your footer content here... -->
     74    </div>
     75  </body>
     76</html>
    5677}}}
    5778
    58 You can use a !ClearSilver variable to reference a style sheet stored in the project environment's `htdocs` directory:
    59 {{{
    60 @import url(<?cs var:chrome.href ?>/site/style.css);
     79Notice that XSLT bears some similarities with Genshi templates. However, there are some Trac specific features, for example the `${href.chrome('site/style.css')}` attribute references `style.css` in the environment's `htdocs/` directory. In a similar fashion `${chrome.htdocs_location}` is used to specify the common `htdocs/` directory belonging to a Trac installation. That latter location can however be overriden using the [TracIni#trac-htdocs_location-option "[trac] htdocs_location"] setting.
     80
     81`site.html` is one file to contain all your modifications. It usually works using the `py:match` directive (element or attribute), and it allows you to modify the page as it renders. The matches hook into specific sections. See [https://groups.google.com/group/trac-users/browse_thread/thread/70487fb2c406c937/ this thread] for a detailed explanation of the above example `site.html`.
     82A `site.html` can contain any number of `py:match` sections. This is all Genshi, so the [https://genshi.edgewall.org/wiki/Documentation/xml-templates.html docs on the exact syntax] can be found there.
     83
     84Example snippet of adding introduction text to the new ticket form (but not shown during preview):
     85
     86{{{#!xml
     87<form py:match="div[@id='content' and @class='ticket']/form" py:attrs="select('@*')">
     88  <py:if test="req.path_info == '/newticket' and (not 'preview' in req.args)">
     89    <p>Please make sure to search for existing tickets before reporting a new one!</p>
     90  </py:if>
     91  ${select('*')}
     92</form>
    6193}}}
    6294
    63 == Project List ==
    64 You can use a custom ClearSilver template to display the list of projects if you are using Trac with multiple projects. 
     95This example illustrates a technique of using `req.path_info` to limit scope of changes to one view only. For instance, to make changes in `site.html` only for timeline and avoid modifying other sections, use `req.path_info == '/timeline'` as the condition in a `<py:if>` test.
    6596
    66 The following is the basic template used by Trac to display a list of links to the projects.  For projects that could not be loaded it displays an error message. You can use this as a starting point for your own index template.
     97More examples snippets for `site.html` can be found at [trac:wiki:CookBook/SiteHtml CookBook/SiteHtml].
    6798
    68 {{{
    69 #!text/html
    70 <html>
    71 <head><title>Available Projects</title></head>
    72 <body>
    73  <h1>Available Projects</h1>
    74  <ul><?cs
    75  each:project = projects ?><li><?cs
    76   if:project.href ?>
    77    <a href="<?cs var:project.href ?>" title="<?cs var:project.description ?>">
    78     <?cs var:project.name ?></a><?cs
    79   else ?>
    80    <small><?cs var:project.name ?>: <em>Error</em> <br />
    81    (<?cs var:project.description ?>)</small><?cs
    82   /if ?>
    83   </li><?cs
    84  /each ?>
    85  </ul>
    86 </body>
     99Example snippets for `style.css` can be found at [trac:wiki:CookBook/SiteStyleCss CookBook/SiteStyleCss].
     100
     101Note that the `site.html`, despite its name, can be put in a shared templates directory, see the [[TracIni#inherit-templates_dir-option|[inherit] templates_dir]] option. This could provide easier maintainence as one new global `site.html` file can be made to include any existing header, footer and newticket snippets.
     102
     103== Project List #ProjectList
     104
     105You can use a custom Genshi template to display the list of projects if you are using Trac with multiple projects.
     106
     107The following is the basic template used by Trac to display a list of links to the projects. For projects that could not be loaded, it displays an error message. You can use this as a starting point for your own index template:
     108
     109{{{#!text/html
     110<!DOCTYPE html
     111    PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
     112    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
     113<html xmlns="http://www.w3.org/1999/xhtml"
     114      xmlns:py="http://genshi.edgewall.org/"
     115      xmlns:xi="http://www.w3.org/2001/XInclude">
     116  <head>
     117    <title>Available Projects</title>
     118  </head>
     119  <body>
     120    <h1>Available Projects</h1>
     121    <ul>
     122      <li py:for="project in projects" py:choose="">
     123        <a py:when="project.href" href="$project.href"
     124           title="$project.description">$project.name</a>
     125        <py:otherwise>
     126          <small>$project.name: <em>Error</em> <br /> ($project.description)</small>
     127        </py:otherwise>
     128      </li>
     129    </ul>
     130  </body>
    87131</html>
    88132}}}
    … …  
    90134Once you've created your custom template you will need to configure the webserver to tell Trac where the template is located:
    91135
    92 For [wiki:TracFastCgi FastCGI]:
    93 {{{
     136For [wiki:TracModWSGI mod_wsgi]:
     137{{{#!python
     138os.environ['TRAC_ENV_INDEX_TEMPLATE'] = '/path/to/template.html'
     139}}}
     140
     141For [TracFastCgi FastCGI]:
     142{{{#!apache
    94143FastCgiConfig -initial-env TRAC_ENV_PARENT_DIR=/parent/dir/of/projects \
    95144              -initial-env TRAC_ENV_INDEX_TEMPLATE=/path/to/template
    96145}}}
    97146
    98 For [wiki:TracModPython mod_python]:
    99 {{{
     147For [TracModPython mod_python]:
     148{{{#!apache
     149PythonOption TracEnvParentDir /parent/dir/of/projects
    100150PythonOption TracEnvIndexTemplate /path/to/template
    101151}}}
    102152
    103 For [wiki:TracCgi CGI]:
    104 {{{
     153For [TracCgi CGI]:
     154{{{#!apache
    105155SetEnv TRAC_ENV_INDEX_TEMPLATE /path/to/template
    106156}}}
    107157
     158For TracStandalone, you'll need to set up the `TRAC_ENV_INDEX_TEMPLATE` environment variable in the shell used to launch tracd:
     159 - Unix:
     160   {{{#!sh
     161$ export TRAC_ENV_INDEX_TEMPLATE=/path/to/template
     162   }}}
     163 - Windows:
     164   {{{#!sh
     165$ set TRAC_ENV_INDEX_TEMPLATE=/path/to/template
     166   }}}
    108167
    109 == Main Templates ==
     168== Project Templates
    110169
    111 It is also possible to use your own modified versions of the Trac [http://www.clearsilver.net/ ClearSilver] templates. Note though that this technique is not recommended because it makes upgrading Trac rather problematic: there are unfortunately several dependencies between the templates and the application code, such as the name of form fields and the structure of the template data, and these are likely to change between different versions of Trac.
     170The appearance of each individual Trac environment, ie instance of a project, can be customized independently of other projects, even those hosted on the same server. The recommended way is to use a `site.html` template whenever possible, see [#SiteAppearance]. Using `site.html` means changes are made to the original templates as they are rendered, and you should not normally need to redo modifications whenever Trac is upgraded. If you do make a copy of `theme.html` or any other Trac template, you need to migrate your modifiations to the newer version. If not, new Trac features or bug fixes may not work as expected.
    112171
    113 If you absolutely need to use modified templates, copy the template files from the default templates directory (usually in found in `$prefix/share/trac/templates`) into the `templates` directory of the project environment. Then modify those copies to get the desired results.
     172With that word of caution, any Trac template may be copied and customized. The default Trac templates are located in the Trac egg or wheel, such as `/usr/lib/pythonVERSION/site-packages/Trac-VERSION.egg/trac/templates, ../trac/ticket/templates, ../trac/wiki/templates`. The [#ProjectList] template file is called `index.html`, while the template responsible for main layout is called `theme.html`. Page assets such as images and CSS style sheets are located in the egg's or wheel's `trac/htdocs` directory.
     173
     174However, do not edit templates or site resources inside the Trac egg/wheel. Reinstalling Trac overwrites your modifications. Instead use one of these alternatives:
     175 * For a modification to one project only, copy the template to project `templates` directory.
     176 * For a modification shared by several projects, copy the template to a shared location and have each project point to this location using the [[TracIni#inherit-templates_dir-option|[inherit] templates_dir]] option.
     177
     178Trac resolves requests for a template by first looking inside the project, then in any inherited templates location, and finally inside the Trac egg or wheel.
     179
     180Trac caches templates in memory by default to improve performance. To apply a template you need to restart the web server.
    114181
    115182----
    116 See also TracGuide, TracIni
     183See also TracIni, TracNavigation