Class: JSON::Editor::PopUpMenu

Inherits:
Object
  • Object
show all
Includes:
MenuExtension
Defined in:
lib/json/editor.rb

Overview

This class creates the popup menu, that opens when clicking onto the treeview.

Instance Attribute Summary

Attributes included from MenuExtension

#menu, #treeview

Instance Method Summary collapse

Methods included from MenuExtension

#add_item, #add_separator, #initialize, #method_missing

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class JSON::Editor::MenuExtension

Instance Method Details

#append_new_node(item) ⇒ Object

Append a new node to the selected Hash or Array.



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# File 'lib/json/editor.rb', line 357

def append_new_node(item)
  if parent = selection.selected
    parent_type = parent.type
    case parent_type
    when 'Hash'
      key, type, content = ask_for_hash_pair(parent)
      key or return
      iter = create_node(parent, 'Key', key)
      iter = create_node(iter, type, content)
      toplevel.display_status(
        "Added a (key, value)-pair to '#{parent_type}'.")
      window.change
    when 'Array'
      type, content = ask_for_element(parent)
      type or return
      iter = create_node(parent, type, content)
      window.change
      toplevel.display_status("Appendend an element to '#{parent_type}'.")
    else
      toplevel.display_status("Cannot append to '#{parent_type}'!")
    end
  else
    type, content = ask_for_element
    type or return
    iter = create_node(nil, type, content)
    window.change
  end
end

#change_node(item) ⇒ Object

Change the type or content of the selected node.



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# File 'lib/json/editor.rb', line 234

def change_node(item)
  if current = selection.selected
    parent = current.parent
    old_type, old_content = current.type, current.content
    if ALL_TYPES.include?(old_type)
      @clipboard_data = Editor.model2data(current)
      type, content = ask_for_element(parent, current.type,
        current.content)
      if type
        current.type, current.content = type, content
        current.remove_subtree(model)
        toplevel.display_status("Changed a node in tree.")
        window.change
      end
    else
      toplevel.display_status(
        "Cannot change node of type #{old_type} in tree!")
    end
  end
end

#collapse_expand(item) ⇒ Object

Recursively collapse/expand a subtree starting from the selected node.



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# File 'lib/json/editor.rb', line 413

def collapse_expand(item)
  if current = selection.selected
    if row_expanded?(current.path)
      collapse_row(current.path)
    else
      expand_row(current.path, true)
    end
  else
      toplevel.display_status("Append a node into the root first!")
  end
end

#copy_node(item) ⇒ Object

Copy the selected node and its subtree, and save it into the clipboard.



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# File 'lib/json/editor.rb', line 274

def copy_node(item)
  if current = selection.selected
    if current and current.type == 'Key'
      @clipboard_data = {
        current.content => Editor.model2data(current.first_child)
      }
    else
      @clipboard_data = Editor.model2data(current)
    end
    window.change
    toplevel.display_status("Copied a node from tree.")
  end
end

#create ⇒ Object

Create the menu.



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# File 'lib/json/editor.rb', line 426

def create
  add_item("Change node", &method(:change_node))
  add_separator
  add_item("Cut node", &method(:cut_node))
  add_item("Copy node", &method(:copy_node))
  add_item("Paste node (appending)", &method(:paste_node_appending))
  add_item("Paste node (inserting before)",
    &method(:paste_node_inserting_before))
  add_separator
  add_item("Append new node", &method(:append_new_node))
  add_item("Insert new node before", &method(:insert_new_node))
  add_separator 
  add_item("Collapse/Expand node (recursively)",
    &method(:collapse_expand))

  menu.show_all
  signal_connect(:button_press_event) do |widget, event|
    if event.kind_of? Gdk::EventButton and event.button == 3
      menu.popup(nil, nil, event.button, event.time)
    end
  end
  signal_connect(:popup_menu) do
    menu.popup(nil, nil, 0, Gdk::Event::CURRENT_TIME)
  end
end

#cut_node(item) ⇒ Object

Cut the selected node and its subtree, and save it into the clipboard.



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# File 'lib/json/editor.rb', line 257

def cut_node(item)
  if current = selection.selected
    if current and current.type == 'Key'
      @clipboard_data = {
        current.content => Editor.model2data(current.first_child)
      }
    else
      @clipboard_data = Editor.model2data(current)
    end
    model.remove(current)
    window.change
    toplevel.display_status("Cut a node from tree.")
  end
end

#insert_new_node(item) ⇒ Object

Insert a new node into an Array before the selected element.



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# File 'lib/json/editor.rb', line 387

def insert_new_node(item)
  if current = selection.selected
    parent = current.parent or return
    parent_parent = parent.parent
    parent_type = parent.type
    if parent_type == 'Array'
      selected_index = parent.each_with_index do |c, i|
        break i if c == current
      end
      type, content = ask_for_element(parent)
      type or return
      iter = model.insert_before(parent, current)
      iter.type, iter.content = type, content
      toplevel.display_status("Inserted an element to " +
        "'#{parent_type}' before index #{selected_index}.")
      window.change
    else
      toplevel.display_status(
        "Cannot insert node below '#{parent_type}'!")
    end
  else
      toplevel.display_status("Append a node into the root first!")
  end
end

#paste_node_appending(item) ⇒ Object

Paste the data in the clipboard into the selected Array or Hash by appending it.



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# File 'lib/json/editor.rb', line 290

def paste_node_appending(item)
  if current = selection.selected
    if @clipboard_data
      case current.type
      when 'Array'
        Editor.data2model(@clipboard_data, model, current)
        expand_collapse(current)
      when 'Hash'
        if @clipboard_data.is_a? Hash
          parent = current.parent
          hash = Editor.model2data(current)
          model.remove(current)
          hash.update(@clipboard_data)
          Editor.data2model(hash, model, parent)
          if parent
            expand_collapse(parent)
          elsif @expanded
            expand_all
          end
          window.change
        else
          toplevel.display_status(
            "Cannot paste non-#{current.type} data into '#{current.type}'!")
        end
      else
        toplevel.display_status(
          "Cannot paste node below '#{current.type}'!")
      end
    else
      toplevel.display_status("Nothing to paste in clipboard!")
    end
  else
      toplevel.display_status("Append a node into the root first!")
  end
end

#paste_node_inserting_before(item) ⇒ Object

Paste the data in the clipboard into the selected Array inserting it before the selected element.



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# File 'lib/json/editor.rb', line 328

def paste_node_inserting_before(item)
  if current = selection.selected
    if @clipboard_data
      parent = current.parent or return
      parent_type = parent.type
      if parent_type == 'Array'
        selected_index = parent.each_with_index do |c, i|
          break i if c == current
        end
        Editor.data2model(@clipboard_data, model, parent) do |m|
          m.insert_before(parent, current)
        end
        expand_collapse(current)
        toplevel.display_status("Inserted an element to " +
          "'#{parent_type}' before index #{selected_index}.")
        window.change
      else
        toplevel.display_status(
          "Cannot insert node below '#{parent_type}'!")
      end
    else
      toplevel.display_status("Nothing to paste in clipboard!")
    end
  else
      toplevel.display_status("Append a node into the root first!")
  end
end