445 lines
12 KiB
Perl
445 lines
12 KiB
Perl
package WebGUI::Session::Style;
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=head1 LEGAL
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-------------------------------------------------------------------
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WebGUI is Copyright 2001-2007 Plain Black Corporation.
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-------------------------------------------------------------------
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Please read the legal notices (docs/legal.txt) and the license
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(docs/license.txt) that came with this distribution before using
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this software.
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-------------------------------------------------------------------
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http://www.plainblack.com info@plainblack.com
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-------------------------------------------------------------------
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=cut
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use strict;
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use Tie::CPHash;
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use WebGUI::International;
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use WebGUI::Macro;
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use WebGUI::Asset::Template;
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use WebGUI;
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=head1 NAME
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Package WebGUI::Session::Style
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=head1 DESCRIPTION
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This package contains utility methods for WebGUI's style system.
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=head1 SYNOPSIS
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use WebGUI::Session::Style;
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$style = WebGUI::Session::Style->new($session);
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$html = $style->generateAdditionalHeadTags();
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$html = $style->process($content);
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$session = $style->session;
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$style->makePrintable(1);
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$style->setLink($url,\%params);
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$style->setMeta(\%params);
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$style->setRawHeadTags($html);
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$style->setScript($url, \%params);
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$style->useEmptyStyle(1);
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=head1 METHODS
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These methods are available from this class:
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=cut
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#-------------------------------------------------------------------
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=head2 DESTROY ( )
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Deconstructor.
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=cut
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sub DESTROY {
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my $self = shift;
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undef $self;
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}
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#-------------------------------------------------------------------
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=head2 generateAdditionalHeadTags ( )
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Creates tags that were set using setLink, setMeta, setScript, extraHeadTags, and setRawHeadTags.
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Macros are processed in the tags if processed by this method.
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=cut
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sub generateAdditionalHeadTags {
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my $self = shift;
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my $tags = $self->{_raw};
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delete $self->{_raw};
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delete $self->{_javascript};
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delete $self->{_link};
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WebGUI::Macro::process($self->session,\$tags);
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return $tags;
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}
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#-------------------------------------------------------------------
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=head2 makePrintable ( boolean )
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Tells the system to use the make printable style instead of the normal style.
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=head3 boolean
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If set to 1 then the printable style will be used, otherwise the regular style will be used.
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=cut
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sub makePrintable {
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my $self = shift;
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$self->{_makePrintable} = shift;
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}
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#-------------------------------------------------------------------
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=head2 new ( session )
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Constructor.
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=head3 session
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A reference to the current session.
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=cut
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sub new {
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my $class = shift;
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my $session = shift;
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bless {_session=>$session}, $class;
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}
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#-------------------------------------------------------------------
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=head2 process ( content, templateId )
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Returns a parsed style with content based upon the current WebGUI session information.
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Sets the C<sent> method/flag to be true so that subsequent head data is processed
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right away.
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=head3 content
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The content to be parsed into the style. Usually generated by WebGUI::Page::generate().
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=head3 templateId
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The unique identifier for the template to retrieve.
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If $style->useEmptyStyle has been set, then the empty style
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templateId will be used over templateId. If personalStyleId
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is set in $session->scratch, then that id will be used over the
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other two. Finally, if $style->makePrintable has been called,
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process will try to find a template for making the output printable
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from $style->printableStyleId, from $session->asset or from any of
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$session->asset's ancestors.
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=cut
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sub process {
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my $self = shift;
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my %var;
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$var{'body.content'} = shift;
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my $templateId = shift;
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if ($self->{_makePrintable} && $self->session->asset) {
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$templateId = $self->{_printableStyleId} || $self->session->asset->get("printableStyleTemplateId");
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my $currAsset = $self->session->asset;
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my $rootAssetId = WebGUI::Asset->getRoot($self->session)->getId;
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TEMPLATE: until ($templateId) {
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# some assets don't have this property. But at least one ancestor should....
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$currAsset = $currAsset->getParent;
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$templateId = $currAsset->get("printableStyleTemplateId");
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last TEMPLATE if $currAsset->getId eq $rootAssetId;
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}
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} elsif ($self->session->scratch->get("personalStyleId") ne "") {
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$templateId = $self->session->scratch->get("personalStyleId");
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} elsif ($self->{_useEmptyStyle}) {
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$templateId = 'PBtmpl0000000000000132';
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}
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$var{'head.tags'} = '
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<meta name="generator" content="WebGUI '.$WebGUI::VERSION.'" />
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<meta http-equiv="Content-Script-Type" content="text/javascript" />
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<meta http-equiv="Content-Style-Type" content="text/css" />
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<script type="text/javascript">
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function getWebguiProperty (propName) {
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var props = new Array();
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props["extrasURL"] = "'.$self->session->url->extras().'";
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props["pageURL"] = "'.$self->session->url->page(undef, undef, 1).'";
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return props[propName];
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}
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</script>
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<!--morehead-->
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';
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if ($self->session->user->isInGroup(2) || $self->session->setting->get("preventProxyCache")) {
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# This "triple incantation" panders to the delicate tastes of various browsers for reliable cache suppression.
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$var{'head.tags'} .= '
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<meta http-equiv="Pragma" content="no-cache" />
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<meta http-equiv="Cache-Control" content="no-cache, must-revalidate, max-age=0, private" />
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<meta http-equiv="Expires" content="0" />
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';
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$self->session->http->setCacheControl("none");
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} else {
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$var{'head.tags'} .= '<meta http-equiv="Cache-Control" content="must-revalidate" />'
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}
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my $style = WebGUI::Asset::Template->new($self->session,$templateId);
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my $output;
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if (defined $style) {
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my $meta = {};
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if ($self->session->setting->get("metaDataEnabled")) {
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$meta = $style->getMetaDataFields();
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}
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foreach my $field (keys %$meta) {
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$var{$meta->{$field}{fieldName}} = $meta->{$field}{value};
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}
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$output = $style->process(\%var);
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} else {
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$output = "WebGUI was unable to instantiate your style template.".$var{'body.content'};
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}
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WebGUI::Macro::process($self->session,\$output);
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$self->sent(1);
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my $macroHeadTags = $self->generateAdditionalHeadTags();
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$output =~ s/\<\!--morehead--\>/$macroHeadTags/;
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return $output;
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}
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#-------------------------------------------------------------------
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=head2 session ( )
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Returns a reference to the current session.
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=cut
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sub session {
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my $self = shift;
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return $self->{_session};
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}
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#-------------------------------------------------------------------
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=head2 sent ( boolean )
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Returns a boolean indicating whether the style has already been sent. This is important when trying to set things to the HTML head block.
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=head3 boolean
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Set the value.
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=cut
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sub sent {
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my $self = shift;
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my $boolean = shift;
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if (defined $boolean) {
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$self->session->stow->set("styleHeadSent",$boolean);
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return $boolean;
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}
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return $self->session->stow->get("styleHeadSent");
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}
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#-------------------------------------------------------------------
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=head2 setLink ( url, params )
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Sets a <link> tag into the <head> of this rendered page for this page
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view. This is typically used for dynamically adding references to CSS
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and RSS documents. Tags are normally cached until the $style->sent
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flag is set to be true. If this method is called after that sent is
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true, then the tag will be sent immediately, but will not be processed
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for macros.
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=head3 url
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The URL to the document you are linking. Only one link can be set per url. If a link to this URL exists,
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the old link will remain and this method will return undef.
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=head3 params
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A hash reference containing the other parameters to be included in the link tag, such as "rel" and "type".
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=cut
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sub setLink {
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my $self = shift;
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my $url = shift;
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my $params = shift;
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$params = {} unless (defined $params and ref $params eq 'HASH');
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return if ($self->{_link}{$url});
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my $tag = '<link href="'.$url.'"';
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foreach my $name (keys %{$params}) {
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$tag .= ' '.$name.'="'.$params->{$name}.'"';
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}
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$tag .= ' />'."\n";
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$self->{_link}{$url} = 1;
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$self->setRawHeadTags($tag);
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}
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#-------------------------------------------------------------------
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=head2 setPrintableStyleId ( params )
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Overrides current printable style id defined in assets definition
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=head3 params
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scalar containing id of style to use
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=cut
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sub setPrintableStyleId {
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my $self = shift;
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my $styleId = shift;
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$self->{_printableStyleId} = $styleId;
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}
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#-------------------------------------------------------------------
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=head2 setMeta ( params )
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Sets a <meta> tag into the <head> of this rendered page for this
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page view. Tags are normally cached until the $style->sent flag is
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set to be true. If this method is called after that sent is true,
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then the tag will be sent immediately, but will not be processed
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=head3 params
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A hash reference containing the parameters of the meta tag.
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=cut
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sub setMeta {
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my $self = shift;
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my $params = shift;
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my $tag = '<meta';
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foreach my $name (keys %{$params}) {
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$tag .= ' '.$name.'="'.$params->{$name}.'"';
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}
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$tag .= ' />'."\n";
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$self->setRawHeadTags($tag);
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}
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#-------------------------------------------------------------------
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=head2 setRawHeadTags ( tags )
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Sets data to be output into the <head> of the current rendered page
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for this page view. Tags are normally cached until the $style->sent
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flag is set to be true. If this method is called after that sent is
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true, then the tag will be sent immediately, but will not be processed
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for macros.
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=head3 tags
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A raw string containing tags. This is just a raw string so you must actually pass in the full tag to use this call.
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=cut
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sub setRawHeadTags {
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my $self = shift;
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my $tags = shift;
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if ($self->sent) {
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$self->session->output->print($tags);
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}
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else {
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$self->{_raw} .= $tags;
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}
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}
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#-------------------------------------------------------------------
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=head2 setScript ( url, params )
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Sets a <script> tag into the <head> of this rendered page for this
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page view. This is typically used for dynamically adding references
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to Javascript or ECMA script. Tags are normally cached until the
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$style->sent flag is set to be true. If this method is called after
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that sent is true, then the tag will be sent immediately, but will
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not be processed for macros.
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=head3 url
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The URL to your script.
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=head3 params
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A hash reference containing the additional parameters to include in the script tag, such as "type" and "language".
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=cut
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sub setScript {
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my $self = shift;
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my $url = shift;
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my $params = shift;
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return if ($self->{_javascript}{$url});
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my $tag = '<script src="'.$url.'"';
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foreach my $name (keys %{$params}) {
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$tag .= ' '.$name.'="'.$params->{$name}.'"';
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}
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$tag .= '></script>'."\n";
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$self->{_javascript}{$url} = 1;
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$self->setRawHeadTags($tag);
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}
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#-------------------------------------------------------------------
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=head2 useEmptyStyle ( boolean )
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Tells the style system to use an empty style rather than outputing the normal
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style. This is useful when you want your code to dynamically generate a style.
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=head3 boolean
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If set to 1 it will use an empty style, if set to 0 it will use the regular
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style. Defaults to 0.
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=cut
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sub useEmptyStyle {
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my $self = shift;
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$self->{_useEmptyStyle} = shift;
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}
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#-------------------------------------------------------------------
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=head2 userStyle ( content )
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Wrapper's the content in the user style defined in the settings.
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=head3 content
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The content to be wrappered.
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=cut
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sub userStyle {
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my $self = shift;
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my $output = shift;
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$self->session->http->setCacheControl("none");
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if (defined $output) {
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return $self->process($output,$self->session->setting->get("userFunctionStyleId"));
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} else {
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return;
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}
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}
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1;
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