100 lines
2.7 KiB
Ruby
100 lines
2.7 KiB
Ruby
# Translation of the bookmark class from the PHP FPDF script from Olivier Plathey
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# Translated by Sylvain Lafleur and ?? with the help of Brian Ollenberger
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#
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# First added in 1.53b
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#
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# Usage is as follows:
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#
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# require 'fpdf'
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# require 'bookmark'
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# pdf = FPDF.new
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# pdf.extend(PDF_Bookmark)
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#
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# This allows it to be combined with other extensions, such as the Chinese
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# module.
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module PDF_Bookmark
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def PDF_Bookmark.extend_object(o)
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o.instance_eval('@outlines,@OutlineRoot=[],0')
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super(o)
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end
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def Bookmark(txt,level=0,y=0)
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y=self.GetY() if y==-1
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@outlines.push({'t'=>txt,'l'=>level,'y'=>y,'p'=>self.PageNo()})
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end
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def putbookmarks
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@nb=@outlines.size
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return if @nb==0
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lru=[]
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level=0
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@outlines.each_index do |i|
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o=@outlines[i]
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if o['l']>0
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parent=lru[o['l']-1]
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# Set parent and last pointers
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@outlines[i]['parent']=parent
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@outlines[parent]['last']=i
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if o['l']>level
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# Level increasing: set first pointer
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@outlines[parent]['first']=i
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end
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else
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@outlines[i]['parent']=@nb
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end
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if o['l']<=level and i>0
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# Set prev and next pointers
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prev=lru[o['l']]
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@outlines[prev]['next']=i
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@outlines[i]['prev']=prev
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end
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lru[o['l']]=i
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level=o['l']
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end
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# Outline items
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n=@n+1
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@outlines.each_index do |i|
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o=@outlines[i]
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newobj
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out('<</Title '+(textstring(o['t'])))
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out('/Parent '+(n+o['parent']).to_s+' 0 R')
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if o['prev']
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out('/Prev '+(n+o['prev']).to_s+' 0 R')
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end
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if o['next']
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out('/Next '+(n+o['next']).to_s+' 0 R')
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end
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if o['first']
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out('/First '+(n+o['first']).to_s+' 0 R')
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end
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if o['last']
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out('/Last '+(n+o['last']).to_s+' 0 R')
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end
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out(sprintf('/Dest [%d 0 R /XYZ 0 %.2f
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null]',1+2*o['p'],(@h-o['y'])*@k))
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out('/Count 0>>')
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out('endobj')
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end
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# Outline root
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newobj
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@OutlineRoot=@n
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out('<</Type /Outlines /First '+n.to_s+' 0 R')
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out('/Last '+(n+lru[0]).to_s+' 0 R>>')
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out('endobj')
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end
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def putresources
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super
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putbookmarks
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end
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def putcatalog
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super
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if not @outlines.empty?
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out('/Outlines '+@OutlineRoot.to_s+' 0 R')
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out('/PageMode /UseOutlines')
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end
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end
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end
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