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.\" ========================================================================
.\"
.IX Title "PDF::API2::Outline 3pm"
.TH PDF::API2::Outline 3pm "2023-09-29" "perl v5.36.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
PDF::API2::Outline \- Manage PDF outlines (a.k.a. bookmarks)
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&    # Get/create the top\-level outline tree
\&    my $outline = $pdf\->outline();
\&
\&    # Add an entry
\&    my $item = $outline\->outline();
\&    $item\->title(\*(AqFirst Page\*(Aq);
\&    $item\->destination($pdf\->open_page(1));
.Ve
.SH "METHODS"
.IX Header "METHODS"
.SS "Examine the Outline Tree"
.IX Subsection "Examine the Outline Tree"
\fIhas_children\fR
.IX Subsection "has_children"
.PP
.Vb 1
\&    my $boolean = $outline\->has_children();
.Ve
.PP
Return true if the current outline item has child items.
.PP
\fIcount\fR
.IX Subsection "count"
.PP
.Vb 1
\&    my $integer = $outline\->count();
.Ve
.PP
Return the number of descendants that are visible when the current outline item
is open (expanded).
.PP
\fIfirst\fR
.IX Subsection "first"
.PP
.Vb 1
\&    my $child = $outline\->first();
.Ve
.PP
Return the first child of the current outline level, if one exists.
.PP
\fIlast\fR
.IX Subsection "last"
.PP
.Vb 1
\&    my $child = $outline\->last();
.Ve
.PP
Return the last child of the current outline level, if one exists.
.PP
\fIparent\fR
.IX Subsection "parent"
.PP
.Vb 1
\&    my $parent = $outline\->parent();
.Ve
.PP
Return the parent of the current item, if not at the top level of the outline
tree.
.PP
\fIprev\fR
.IX Subsection "prev"
.PP
.Vb 1
\&    my $sibling = $outline\->prev();
.Ve
.PP
Return the previous item of the current level of the outline tree.
.PP
\fInext\fR
.IX Subsection "next"
.PP
.Vb 1
\&    my $sibling = $outline\->next();
.Ve
.PP
Return the next item of the current level of the outline tree.
.SS "Modify the Outline Tree"
.IX Subsection "Modify the Outline Tree"
\fIoutline\fR
.IX Subsection "outline"
.PP
.Vb 1
\&    my $child = $outline\->outline();
.Ve
.PP
Add an outline item at the end of the current outline's list of children.
.PP
\fIinsert_after\fR
.IX Subsection "insert_after"
.PP
.Vb 1
\&    my $sibling = $outline\->insert_after();
.Ve
.PP
Add an outline item immediately following the current item.
.PP
\fIinsert_before\fR
.IX Subsection "insert_before"
.PP
.Vb 1
\&    $sibling = $outline\->insert_before();
.Ve
.PP
Add an outline item immediately preceding the current item.
.PP
\fIdelete\fR
.IX Subsection "delete"
.PP
.Vb 1
\&    $outline\->delete();
.Ve
.PP
Remove the current outline item from the outline tree.  If the item has any
children, they will effectively be deleted as well since they will no longer be
linked.
.PP
\fIis_open\fR
.IX Subsection "is_open"
.PP
.Vb 2
\&    # Get
\&    my $boolean = $outline\->is_open();
\&
\&    # Set
\&    my $outline = $outline\->is_open($boolean);
.Ve
.PP
Get/set whether the outline is expanded or collapsed.
.SS "Set Outline Attributes"
.IX Subsection "Set Outline Attributes"
\fItitle\fR
.IX Subsection "title"
.PP
.Vb 2
\&    # Get
\&    my $title = $outline\->title();
\&
\&    # Set
\&    $outline = $outline\->title($text);
.Ve
.PP
Get/set the title of the outline item.
.PP
\fIdestination\fR
.IX Subsection "destination"
.PP
.Vb 1
\&    $outline = $outline\->destination($destination, $location, @args);
.Ve
.PP
Set the destination page and optional position of the outline.  \f(CW$location\fR and
\&\f(CW@args\fR are as defined in \*(L"destination\*(R" in PDF::API2::NamedDestination.
.PP
\&\f(CW$destination\fR can optionally be the name of a named destination defined
elsewhere.
.PP
\fIuri\fR
.IX Subsection "uri"
.PP
.Vb 1
\&    $outline = $outline\->uri($uri);
.Ve
.PP
Launch a \s-1URI\s0 \*(-- typically a web page \*(-- when the outline item is activated.
.PP
\fIlaunch\fR
.IX Subsection "launch"
.PP
.Vb 1
\&    $outline\->launch($file);
.Ve
.PP
Launch an application or file when the outline item is activated.
.PP
\fIpdf\fR
.IX Subsection "pdf"
.PP
.Vb 1
\&    $outline = $outline\->pdf($filename, $page_number, $location, @args);
.Ve
.PP
Open another \s-1PDF\s0 file to a particular page number (first page is zero, which is
also the default).  The page can optionally be positioned at a particular
location if \f(CW$location\fR and \f(CW@args\fR are set \*(-- see
\&\*(L"destination\*(R" in PDF::API2::NamedDestination for possible settings.