Revision 42f69828
Von Sven Schöling vor mehr als 11 Jahren hinzugefügt
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__END__ |
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=encoding utf-8 |
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=head1 NAME |
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SL::Layout::Base - Base class for layouts |
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=head1 SYNOPSIS |
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package SL::Layout::MyLayout; |
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use parent qw(SL::Layout::Base); |
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=head1 DESCRIPTION |
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For a description about the external interface of layouts in general see |
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L<SL::Layout::Dispatcher>. |
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This is a base class for layouts in general. It provides the basic interface |
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and some capabilities to extend and cascade layouts. |
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=head1 IMPLEMENTING LAYOUT CALLBACKS |
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There are eight callbacks (C<pre_content>, C<post_content>, C<start_content>, |
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C<end_content>, C<stylesheets>, C<stylesheets_inline>, C<javscripts>, |
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C<javascripts_inline>) which are documented in L<SL::Layout::Dispatcher>. If |
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you are writing a new simple layout, you can just override some of them like |
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this: |
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package SL::Layout::MyEvilLayout; |
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sub pre_content { |
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'<h1>This is MY page now</h1>' |
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} |
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sub post_content { |
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'<p align="right"><small><em>Brought to you by my own layout class</em></small></p>' |
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} |
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To preserve the sanitizing effects of C<stylesheets> and C<javascripts> you should instead do the following: |
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sub stylesheets { |
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$_[0]->add_stylesheets(qw(mystyle1.css mystyle2.css); |
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$_[0]->SUPER::stylesheets; |
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} |
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If you want to add something to a different layout, you should write a sub |
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layout and add it to the other layouts. |
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=head1 SUB LAYOUTS |
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Layouts can be aggregated, so that common elements can be used in different |
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layouts. Currently this is used for the L<None|SL::Layout::None> sub layout, |
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which contains a lot of the stylesheets and javascripts necessary. Another |
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example is the L<Top|SL::Layout::Top> layout, which is used to generate a |
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common top bar for all menu types. |
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To add a sub layout to your layout just overwrite the sub_layout method: |
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package SL::Layout::MyFinalLayout; |
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sub init_sub_layout { |
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[ |
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SL::Layout::None->new, |
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SL::Layout::MyEvilLayout->new, |
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] |
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} |
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You can also add a sublayout at runtime: |
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$layout->add_sub_layout(SL::Layout::SideBar->new); |
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The standard implementation for the callbacks will see to it that the contents |
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of all sub layouts will get rendered. |
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=head1 COMBINING SUB LAYOUTS AND OWN BEHAVIOUR |
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This is still somewhat rough, and improvements are welcome. |
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For the C<*_content> callbacks this works if you just remember to dispatch to the base method: |
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sub post_content { |
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return $_[0]->render_status_bar . |
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$_[0]->SUPER::post_content |
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} |
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For the stylesheet and javascript callbacks things are hard, because of the |
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backwards compatibility, and the built-in sanity checks. The best way currently |
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is to just add your content and dispatch to the base method. |
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sub stylesheets { |
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$_[0]->add_stylesheets(qw(mystyle1.css mystyle2.css); |
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$_[0]->SUPER::stylesheets; |
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} |
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=head1 GORY DETAILS ABOUT JAVASCRIPT AND STYLESHEET OVERLOADING |
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The original code used to store one stylehsheet in C<< $form->{stylesheet} >> and |
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allowed/expected authors of potential C<bin/mozilla/> controllers to change |
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that into their own modified stylesheet. |
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This was at some point cleaned up into a method C<use stylesheet> which took a |
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string of space separated stylesheets and processed them into the response. |
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A lot of controllers are still using this methods so the layout interface |
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supports it to change as few controller code as possible, while providing the |
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more intuitive C<add_stylesheets> method. |
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At the same time the following things need to be possible: |
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=over 4 |
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=item 1. |
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Runtime additions. |
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$layout->add_stylesheets(...) |
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Since add_stylesheets adds to C<< $self->{stylesheets} >> there must be a way to read |
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from it. Currently this is the deprecated C<use_stylesheet>. |
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=item 2. |
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Overriding Callbacks |
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A leaf layout should be able to override a callback to return a list. |
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=item 3. |
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Sanitizing |
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C<stylesheets> needs to retain it's sanitizing behaviour. |
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=item 4. |
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Aggregation |
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The standard implementation should be able to collect from sub layouts. |
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=item 5. |
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Preserving of Inclusion Order |
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Since there is currently no standard way of mixing own content and including |
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sub layouts, this has to be done manually. Certain things like jquery get added |
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in L<SL::Layout::None> so that they get rendered first. |
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=back |
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The current implementation provides no good candidate for overriding in sub |
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classes, which should be changed. The other points work pretty well. |
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=head1 BUGS |
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None yet, if you don't count the horrible stylesheet/javascript interface. |
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=head1 AUTHOR |
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Sven Schöling E<lt>s.schoeling@linet-services.deE<gt> |
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=cut |
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SL/Layout/Dispatcher.pm | ||
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} |
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1; |
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__END__ |
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=encoding utf-8 |
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=head1 NAME |
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SL::Layout::Dispatcher - provides layouts by name. |
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=head1 SYNOPSIS |
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use SL::Layout::Dispatcher; |
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$::request->layout(SL::Layout::Dispatcher->new(style => 'login')); |
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# same as |
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use SL::Layout::Login; |
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$::request->layout(SL::Layout::Login->new); |
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=head1 INTRODUCTION |
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A layout in kivitendo is anything that should be included into a text/html |
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response without having each controller do it manually. This includes: |
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=over 4 |
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=item * |
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menus |
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=item * |
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status bars |
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=item |
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div containers for error handling and ajax responses |
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=item * |
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javascript and css includes |
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=item * |
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html header and body |
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=back |
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It does not include: |
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=over 4 |
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=item * |
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http headers |
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=item * |
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anthing that is not a text/html response |
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=back |
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All of these tasks are handled by a layout object, which is stored in the |
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global L<$::request|SL::Request> object. An appropriate layout object will be |
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chosen during the login/session_restore process. |
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=head1 INTERFACE |
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Every layout must be instantiated from L<SL::Layout::Base> and must implement |
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the following eight callbacks: |
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=over 4 |
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=item C<pre_content> |
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Content that must, for whatever reason, appear before the main content. |
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=item C<start_content> |
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An introcutory clause for the main content. Usually something like C<< <div |
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class='content'> >>. |
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=item C<end_content> |
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The corresponding end of L</start_content> like C<< </div> >> |
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=item C<post_content> |
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Any extra content that should appear after the main content in the response |
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source. Note that it is preferred to put extra content after the main content, |
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so that it gets rendered faster. |
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=item C<stylesheets> |
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A list of stylesheets that should be included as a full relative web path. Will |
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be rendered into the html header. |
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=item C<stylesheets_inline> |
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A list of stylesheet snippets that need to be included in the response. Will be |
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added to the html header. |
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=item C<javascripts> |
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A list of javascripts that should be included as a full relative web path. |
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Note: |
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There is no guarantee where these will end up in the content. Currently they |
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will be rendered into the header, but are likely to be moved into the footer in |
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the future. |
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=item C<javascripts_inline> |
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A list of javascript snippets that need to be included in the response. |
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Note: |
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These will end up in the footer, so make sure they don't contain |
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initializations to static javascript includes that may be included earlier. |
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=back |
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=head1 RUNTIME INTERFACE |
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Each layout object can add stylesheets and javascripts at runtime, as long as |
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its before the actual rendering has begun. This can be used to add special |
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javascripts only your controller needs. |
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=over 4 |
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=item C<add_stylesheets> |
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Adds the list of arguments to the list of used stylesheets. |
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These will first be searched in the theme folder for the current user, and only |
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after that be searched from the common C<css/> folder. |
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Duplicated files will be only included once. |
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Non-existing files will be pruned from the list. |
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=item C<use_stylesheet> |
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Backwards compatible alias for C<add_stylesheets>. Deprecated. |
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=item C<add_javascripts> |
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Adds the list of arguments to the list of used javascripts. |
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Duplicated files will be only included once. |
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Non-existing files will be pruned from the list. |
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=item C<use_javascript> |
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Backwards compatible alias for C<add_javascripts>. Deprecated. |
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=item C<add_javascripts_inline> |
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Add a snippet of javascript. |
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=item C<add_stylesheets_inline> |
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Add a snippet of css. |
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=item C<focus> |
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If set with a selector, the layout will generate javascript to set the page |
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focus to that selector on document.ready. |
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=back |
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=head1 BUGS |
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None yet :) |
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=head1 TODO |
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non existing css or js includes should generate a log entry. |
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=head1 AUTHOR |
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Sven Schöling E<lt>s.schoeling@linet-services.deE<gt> |
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=cut |
SL/Request.pm | ||
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Returns the requested content type (either C<html>, C<js> or C<json>). |
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=item C<layout> |
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Set and retrieve the layout object for the current request. Must be an instance |
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of L<SL::Layout::Base>. Defaults to an isntance of L<SL::Layout::None>. |
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For more information about layouts, see L<SL::Layout::Dispatcher>. |
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=back |
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=head1 SPECIAL FUNCTIONS |
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