Class: PDFWalker::PDFTree

Inherits:
TreeView
  • Object
show all
Includes:
PopupMenu
Defined in:
lib/pdfwalker/treeview.rb

Constant Summary collapse

OBJCOL = 
0
TEXTCOL = 
1
WEIGHTCOL = 
2
STYLECOL = 
3
FGCOL = 
4
BGCOL = 
5
LOADCOL = 
6
@@appearance = 
Hash.new(Weight: :normal, Style: :normal)

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from PopupMenu

#popup_menu

Constructor Details

#initialize(parent) ⇒ PDFTree

Returns a new instance of PDFTree.



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# File 'lib/pdfwalker/treeview.rb', line 58

def initialize(parent)
    @parent = parent

    reset_appearance

    @treestore = TreeStore.new(Object::Object, String, Pango::Weight, Pango::Style, String, String, Integer)
    super(@treestore)

    signal_connect('cursor-changed') {
        iter = selection.selected
        if iter
            obj = @treestore.get_value(iter, OBJCOL)

            parent.hexview.load(obj)
            parent.objectview.load(obj)
        end
    }

    signal_connect('row-activated') { |_tree, path,_column|
        if selection.selected
            obj = @treestore.get_value(selection.selected, OBJCOL)

            if row_expanded?(path)
                collapse_row(path)
            else
                expand_row(path, false)
            end

            goto(obj) if obj.is_a?(Origami::Reference)
        end
    }

    signal_connect('row-expanded') { |_tree, iter, _path|
        obj = @treestore.get_value(iter, OBJCOL)

        if obj.is_a?(Origami::Stream) and iter.n_children == 1

            # Processing with an XRef or Object Stream
            if obj.is_a?(Origami::ObjectStream)
                obj.each { |embeddedobj|
                    load_object(iter, embeddedobj)
                }

            elsif obj.is_a?(Origami::XRefStream)
                obj.each { |xref|
                    load_xrefstm(iter, xref)
                }
            end
        end

        for i in 0...iter.n_children
            subiter = iter.nth_child(i)
            subobj = @treestore.get_value(subiter, OBJCOL)

            load_sub_objects(subiter, subobj)
        end
    }

    add_events(Gdk::Event::BUTTON_PRESS_MASK)
    signal_connect('button_press_event') { |_widget, event|
        if event.button == 3 && parent.opened
            path = get_path(event.x,event.y).first
            set_cursor(path, nil, false)

            obj = @treestore.get_value(@treestore.get_iter(path), OBJCOL)
            popup_menu(obj, event, path)
        end
    }
end

Instance Attribute Details

#parent ⇒ Object (readonly)

Returns the value of attribute parent.



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# File 'lib/pdfwalker/treeview.rb', line 56

def parent
  @parent
end

Instance Method Details

#clear ⇒ Object 



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# File 'lib/pdfwalker/treeview.rb', line 128

def clear
    @treestore.clear
end

#goto(obj, follow_references: true) ⇒ Object 



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# File 'lib/pdfwalker/treeview.rb', line 132

def goto(obj, follow_references: true)
    if obj.is_a?(TreePath)
        set_cursor(obj, nil, false)
    else
        if obj.is_a?(Origami::Name) and obj.parent.is_a?(Origami::Dictionary) and obj.parent.has_key?(obj)
            obj = obj.parent[obj]
        elsif obj.is_a?(Origami::Reference) and follow_references
            obj =
                begin
                    obj.solve
                rescue Origami::InvalidReferenceError
                    @parent.error("Object not found : #{obj}")
                    return
                end
        end

        _, path = object_to_tree_pos(obj)
        if path.nil?
            @parent.error("Object not found : #{obj.type}")
            return
        end

        expand_to_path(path) unless row_expanded?(path)
        @parent.explorer_history << cursor.first if cursor.first
        set_cursor(path, nil, false)
    end
end

#highlight(obj, color) ⇒ Object 



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# File 'lib/pdfwalker/treeview.rb', line 160

def highlight(obj, color)
    if obj.is_a?(Origami::Name) and obj.parent.is_a?(Origami::Dictionary) and obj.parent.has_key?(obj)
        obj = obj.parent[obj]
    end

    iter, path = object_to_tree_pos(obj)
    if iter.nil? or path.nil?
        @parent.error("Object not found : #{obj.type}")
        return
    end

    @treestore.set_value(iter, BGCOL, color)
    expand_to_path(path) unless row_expanded?(path)
end

#load(pdf) ⇒ Object 



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# File 'lib/pdfwalker/treeview.rb', line 175

def load(pdf)
    return unless pdf

    self.clear

    begin
        #
        # Create root entry
        #
        root = @treestore.append(nil)
        @treestore.set_value(root, OBJCOL, pdf)

        set_node(root, :Filename, @parent.filename)

        #
        # Create header entry
        #
        header = @treestore.append(root)
        @treestore.set_value(header, OBJCOL, pdf.header)

        set_node(header, :Header,
                 "Header (version #{pdf.header.major_version}.#{pdf.header.minor_version})")

        no = 1
        pdf.revisions.each { |revision|
            load_revision(root, no, revision)
            no = no + 1
        }

        set_model(@treestore)

    ensure
        expand(@treestore.iter_first, 3)
        set_cursor(@treestore.iter_first.path, nil, false)
    end
end

#object_by_path(path) ⇒ Object 



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# File 'lib/pdfwalker/treeview.rb', line 212

def object_by_path(path)
    iter = @treestore.get_iter(path)

    @treestore.get_value(iter, OBJCOL)
end