Class: Alexandria::UI::NewBookDialog

Inherits:
BuilderBase show all
Extended by:
GetText
Includes:
ImageFetcher, Logging, GetText
Defined in:
lib/alexandria/ui/new_book_dialog.rb

Constant Summary collapse

@@last_criterion_was_not_isbn = 
false

Instance Method Summary collapse

Methods included from ImageFetcher

#fetch_image

Methods included from Logging

included, #log

Constructor Details

#initialize(parent, selected_library = nil, &block) ⇒ NewBookDialog

Returns a new instance of NewBookDialog.



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 26

def initialize(parent, selected_library = nil, &block)
  super("new_book_dialog__builder.glade", widget_names)
  log.info { "New Book Dialog" }
  @new_book_dialog.transient_for = @parent = parent
  @block = block
  @destroyed = false
  @selected_library = selected_library
  setup_dialog_gui
  @progressbar.hide
end

Instance Method Details

#add_book_to_library(library, book, cover_uri) ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 409

def add_book_to_library(library, book, cover_uri)
  library.save_cover(book, cover_uri) unless cover_uri.nil?
  library << book
  library.save(book)
end

#add_selected_books(library, _is_new) ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 376

def add_selected_books(library, _is_new)
  books_to_add = []
  @treeview_results.selection.each do |_model, _path, iter|
    @results.each do |book, cover|
      next unless book.ident == iter[1]

      isbn = book.isbn
      if isbn.nil? || isbn.empty?
        log.debug { "noisbn" }
        book.isbn = book.saved_ident = nil
        books_to_add << [book, cover]
        next
      end

      isbn = Library.canonicalise_ean(isbn)
      unless isbn
        log.debug { "invalidisbn #{book.isbn}" }
        next unless KeepBadISBNDialog.new(@new_book_dialog, book).keep?

        book.isbn = book.saved_ident = nil
      end

      book.isbn = isbn
      assert_not_exist(library, isbn)
      books_to_add << [book, cover]
    end
  end
  books_to_add.each do |book, cover_uri|
    add_book_to_library(library, book, cover_uri)
  end
  books_to_add.map(&:first) # array of Books only
end

#add_single_book_by_isbn(library, is_new) ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 331

def add_single_book_by_isbn(library, is_new)
  # Perform the ISBN search via the providers.
  isbn = begin
           Library.canonicalise_isbn(@entry_isbn.text)
         rescue StandardError
           raise _("Couldn't validate the EAN/ISBN you " \
                   "provided.  Make sure it is written " \
                   "correctly, and try again.")
         end
  assert_not_exist(library, @entry_isbn.text)
  @button_add.sensitive = false
  notify_start_add_by_isbn
  GLib::Idle.add do
    @find_thread = Thread.new do
      log.info { "New @find_thread #{Thread.current}" }
      begin
        # MAJOR HACK, add this again...
        Alexandria::BookProviders.instance.add_observer(self)
        book, cover_url = Alexandria::BookProviders.isbn_search(isbn)

        notify_end_add_by_isbn

        if book
          log.debug { "adding book #{book} to library" }
          add_book_to_library(library, book, cover_url)
          @entry_isbn.text = ""

          post_addition([book], library, is_new)
        else
          post_addition([], library, is_new)
        end
      rescue Alexandria::BookProviders::NoResultsError => ex
        @find_error = ex.message
        @button_add.sensitive = true
        notify_end_add_by_isbn
      ensure
        Alexandria::BookProviders.instance.delete_observer(self)
        notify_end_add_by_isbn
      end
    end

    false
  end
end

#copy_results_to_treeview_model(results, model) ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 300

def copy_results_to_treeview_model(results, model)
  results.each do |book, _cover_url|
    s = format(_("%s, by %s"), book.title, book.authors.join(", "))
    similar_books = results.find do |book2, _cover2|
      (book.title == book2.title) &&
        (book.authors == book2.authors)
    end
    s += " (#{book.edition}, #{book.publisher})" if similar_books.length > 1
    log.info { format(_("Copying %s into tree view."), book.title) }
    iter = model.append
    iter[0] = s
    iter[1] = book.ident
    iter[2] = Icons::BOOK
  end
end

#decode_cuecat(entry) ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 316

def decode_cuecat(entry)
  return unless entry.text =~ /^\..*?\..*?\.(.*?)\.$/

  tmp = Regexp.last_match[1].tr("a-zA-Z0-9+-", " -_")
  tmp = ((32 + tmp.length * 3 / 4).to_i.chr << tmp).unpack1("u")
  tmp.chomp!("\000")
  entry.text = tmp.gsub!(/./) { |c| (c[0] ^ 67).chr }
  entry.text = "Bad scan result" if entry.text.count("^ -~") > 0
end

#get_images_async ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 159

def get_images_async
  log.info { "get_images_async" }
  @images = {}
  @image_error = nil
  @image_thread = Thread.new do
    log.info { "New @image_thread #{Thread.current}" }
    begin
      @results.each_with_index do |result, i|
        uri = result[1]
        @images[i] = fetch_image(uri) if uri
      end
    rescue StandardError => ex
      log.error { "Couldn't download image: #{ex.class} #{ex}" }
      log.error { ex.backtrace.join("\n") }
      @image_error = ex.message
    end
  end

  GLib::Timeout.add(100) do
    if @image_error
      image_error_dialog(@image_error).display
      @image_error = nil
    else
      @images.each_pair do |key, value|
        @images.delete(key)

        next unless value

        loader = GdkPixbuf::PixbufLoader.new
        loader.last_write(value)
        pixbuf = loader.pixbuf

        if pixbuf.width > 1
          iter = @treeview_results.model.get_iter(key.to_s)
          unless @treeview_results.model.iter_is_valid?(iter)
            raise format(_("Iter is invalid! %s"), iter)
          end

          iter[2] = pixbuf # I bet you this is it!
        end
      rescue StandardError => ex
        image_error_dialog(ex.message).display
      end
    end

    # Stop if the image download thread has stopped.
    if @image_thread.alive?
      log.info { "@image_thread (#{@image_thread}) still alive." }
      true
    else
      log.info { "@image_thread (#{@image_thread}) asleep now." }
      false
    end
  end
end

#image_error_dialog(error) ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 152

def image_error_dialog(error)
  ErrorDialog.new(
    @parent,
    _("A problem occurred while downloading images"),
    error)
end

#notify_end_add_by_isbn ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 488

def notify_end_add_by_isbn
  MainApp.instance.appbar.children.first.visible = false
  return unless @progress_pulsing

  GLib::Source.remove(@progress_pulsing)
  @progress_pulsing = nil
end

#notify_start_add_by_isbn ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 475

def notify_start_add_by_isbn
  main_progress_bar = MainApp.instance.appbar.children.first
  main_progress_bar.visible = true
  @progress_pulsing = GLib::Timeout.add(100) do
    if @destroyed
      false
    else
      main_progress_bar.pulse
      true
    end
  end
end

#on_add ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 441

def on_add
  return unless @button_add.sensitive?

  @find_thread&.kill
  @image_thread&.kill

  begin
    libraries = LibraryCollection.instance.all_libraries
    library, is_new_library =
      @combo_libraries.selection_from_libraries(libraries)

    # book_was_added = false

    if @isbn_radiobutton.active?
      add_single_book_by_isbn(library, is_new_library)
    else
      books = add_selected_books(library, is_new_library)
      post_addition(books, library, is_new_library)
    end

    # Do not destroy if there is no addition.
    #          return unless book_was_added
  rescue StandardError => ex
    ErrorDialog.new(@new_book_dialog, _("Couldn't add the book"), ex.message).display
  end
  # books_to_add
end

#on_cancel ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 469

def on_cancel
  @find_thread&.kill
  @image_thread&.kill
  @new_book_dialog.destroy
end

#on_changed(entry) ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 146

def on_changed(entry)
  ok = !entry.text.strip.empty?
  decode_cuecat(@entry_isbn) if entry == @entry_isbn
  (entry == @entry_isbn ? @button_add : @button_find).sensitive = ok
end

#on_clicked(widget, event) ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 532

def on_clicked(widget, event)
  if (event.event_type == :button_press) &&
      (event.button == 1)

    radio, target_widget, box2, box3 =
      case widget
      when @eventbox_entry_search
        [@title_radiobutton, @entry_search,
         @eventbox_combo_search, @eventbox_entry_isbn]
      when @eventbox_combo_search
        [@title_radiobutton, @combo_search,
         @eventbox_entry_search, @eventbox_entry_isbn]
      when @eventbox_entry_isbn
        [@isbn_radiobutton, @entry_isbn,
         @eventbox_entry_search, @eventbox_combo_search]
      end
    radio.active = true
    target_widget.grab_focus
    widget.above_child = false
    box2.above_child = box3.above_child = true
  end
end

#on_criterion_toggled(item) ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 102

def on_criterion_toggled(item)
  log.debug { "on_criterion_toggled" }
  return unless item.active?

  # There used to be a strange effect here (pre SVN r1022).
  # When item is first toggled to "Search" the entry_search
  # field was unselectable. One used to have to click the dialog
  # title bar to be able to focus it again. Putting the GUI
  # modifications in an GLib::Idle.add block fixed the problem.

  is_isbn = item == @isbn_radiobutton
  if is_isbn
    GLib::Idle.add do
      @latest_size = @new_book_dialog.size
      @new_book_dialog.resizable = false
      @entry_isbn.grab_focus
      false
    end
  else
    GLib::Idle.add do
      @new_book_dialog.resizable = true
      @new_book_dialog.resize(*@latest_size) unless @latest_size.nil?
      @entry_search.grab_focus
      false
    end
  end
  @entry_isbn.sensitive = is_isbn
  @combo_search.sensitive = !is_isbn
  @entry_search.sensitive = !is_isbn
  @button_find.sensitive = !is_isbn
  @scrolledwindow.visible = !is_isbn
  on_changed(is_isbn ? @entry_isbn : @entry_search)
  unless is_isbn
    @button_add.sensitive =
      @treeview_results.selection.count_selected_rows > 0
  end

  # Remember the last criterion selected (so that we can re-select
  # it when the dialog opens again).
  @@last_criterion_was_not_isbn = !is_isbn

  # @new_book_dialog.present # attempted fix, bring dialog to foreground
end

#on_find ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 215

def on_find
  log.info { "on_find" }
  mode = case @combo_search.active
         when 0
           BookProviders::SEARCH_BY_TITLE
         when 1
           BookProviders::SEARCH_BY_AUTHORS
         when 2
           BookProviders::SEARCH_BY_KEYWORD
         end

  criterion = @entry_search.text.strip
  @treeview_results.model.clear
  log.info do
    format("TreeStore Model: %s columns; ref_counts: %s",
           @treeview_results.model.n_columns,
           @treeview_results.model.ref_count)
  end

  @find_error = nil
  @results = nil

  @find_thread&.kill
  @image_thread&.kill

  notify_start_add_by_isbn
  GLib::Idle.add do
    @find_thread = Thread.new do
      log.info { "New @find_thread #{Thread.current}" }
      begin
        Alexandria::BookProviders.instance.add_observer(self)
        @results = Alexandria::BookProviders.search(criterion, mode)

        log.info { "got #{@results.length} results" }
      rescue StandardError => ex
        @find_error = ex.message
      ensure
        Alexandria::BookProviders.instance.delete_observer(self)
        # notify_end_add_by_isbn
      end
    end
    false
  end

  GLib::Timeout.add(100) do
    # This block copies results into the tree view, or shows an
    # error if the search failed.

    # Err... continue == false if @find_error
    continue = if @find_error
                 ErrorDialog.new(@new_book_dialog,
                                 _("Unable to find matches for your search"),
                                 @find_error).display
                 false
               elsif @results
                 log.info { "Got results: #{@results[0]}..." }
                 copy_results_to_treeview_model(@results, @treeview_results.model)

                 # Kick off the image download thread.
                 if @find_thread.alive?
                   log.info { "@find_thread (#{@find_thread}) still alive." }
                   true
                 else
                   log.info { "@find_thread (#{@find_thread}) asleep now." }
                   # Not really async now.
                   get_images_async
                   false # continue == false if you get to here. Stop timeout.
                 end
               else
                 # Stop if the book find thread has stopped.
                 @find_thread.alive?
               end
    # continue == false if @find_error OR if results are returned
    # timeout ends if continue is false!

    # @find_thread.alive? happens after find_thread is done
    unless continue || @find_thread.alive? || @destroyed
      notify_end_add_by_isbn
      @button_add.sensitive = false
    end

    continue # timeout loop condition
  end
end

#on_focus ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 508

def on_focus
  return unless @isbn_radiobutton.active? && @entry_isbn.text.strip.empty?

  clipboard = Gtk::Clipboard.get(Gdk::Selection::CLIPBOARD)
  text = clipboard.wait_for_text or return

  if Library.valid_isbn?(text) || Library.valid_ean?(text) ||
      Library.valid_upc?(text)
    GLib::Idle.add do
      @entry_isbn.text = text
      @entry_isbn.grab_focus
      @entry_isbn.select_region(0, -1) # select all...
      # @button_add.grab_focus
      false
    end
    log.debug { "Setting ISBN field to #{text}" }
    # FIXME: Get rid of this puts!
    puts text # required, strangely, to prevent GUI strangeness
    # above last checked with ruby-gnome2 0.17.1 2009-12-09
    # if this puts is commented out, the cursor disappears
    # from the @entry_isbn box... weird, ne? - CathalMagus
  end
end

#on_help ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 555

def on_help
  Alexandria::UI.display_help(@preferences_dialog, "add-book-by-isbn")
end

#on_results_button_press_event(_widget, event) ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 326

def on_results_button_press_event(_widget, event)
  # double left click
  on_add if (event.event_type == :"2button_press") && (event.button == 1)
end

#post_addition(books, library, is_new_library) ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 415

def post_addition(books, library, is_new_library)
  log.debug { "post_addition #{books.size}" }
  return if books.empty?

  # books, a 1d array of Alexandria::Book
  @block.call(books, library, is_new_library)

  if @keep_open.active?
    # TODO: reset and clear fields
    if @@last_criterion_was_not_isbn
      @entry_search.select_region(0, -1) # select all, ready to delete
      @treeview_results.model.clear
      @entry_search.grab_focus
    else
      @button_add.sensitive = true #
      @entry_isbn.text = "" # blank ISBN field
      @entry_isbn.grab_focus
    end

  else
    # Now we can destroy the dialog and go back to the main
    # application.
    @new_book_dialog.destroy
  end
end

#setup_dialog_gui ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 49

def setup_dialog_gui
  libraries = LibraryCollection.instance.all_regular_libraries
  @selected_library = libraries.first if @selected_library.is_a?(SmartLibrary)
  @combo_libraries.populate_with_libraries(libraries,
                                           @selected_library)

  @treeview_results.model = Gtk::ListStore.new(String, String,
                                               GdkPixbuf::Pixbuf)
  @treeview_results.selection.mode = :multiple
  @treeview_results.selection.signal_connect("changed") do
    @button_add.sensitive = true
  end

  renderer = Gtk::CellRendererPixbuf.new
  col = Gtk::TreeViewColumn.new("", renderer)
  col.set_cell_data_func(renderer) do |_column, cell, _model, iter|
    pixbuf = iter[2]
    max_height = 25

    if pixbuf.height > max_height
      new_width = pixbuf.width * (max_height.to_f / pixbuf.height)
      pixbuf = pixbuf.scale(new_width, max_height)
    end

    cell.pixbuf = pixbuf
  end
  @treeview_results.append_column(col)

  col = Gtk::TreeViewColumn.new("", Gtk::CellRendererText.new,
                                text: 0)
  @treeview_results.append_column(col)

  @combo_search.active = 0

  # Re-select the last selected criterion.
  # TODO let's do this from a Gconf setting instead, maybe?
  @title_radiobutton.active = @@last_criterion_was_not_isbn

  if @@last_criterion_was_not_isbn
    @entry_search.grab_focus
  else
    @entry_isbn.grab_focus
  end

  @find_thread = nil
  @image_thread = nil

  @new_book_dialog.signal_connect("destroy") do
    @new_book_dialog.destroy
    @destroyed = true
  end
end

#show ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 37

def show
  @new_book_dialog.show
end

#update(status, provider) ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 496

def update(status, provider)
  messages = {
    searching: _("Searching Provider '%s'..."),
    error: _("Error while Searching Provider '%s'"),
    not_found: _("Not Found at Provider '%s'"),
    found: _("Found at Provider '%s'")
  }
  message = messages[status] % provider
  log.debug { "update message : #{message}" }
  MainApp.instance.ui_manager.set_status_label(message)
end

#widget_names ⇒ Object 



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# File 'lib/alexandria/ui/new_book_dialog.rb', line 41

def widget_names
  [:new_book_dialog, :button_add, :button_cancel, :button_find,
   :button_help, :combo_libraries, :combo_search, :entry_isbn,
   :entry_search, :eventbox_combo_search, :eventbox_entry_isbn,
   :eventbox_entry_search, :isbn_radiobutton, :keep_open, :progressbar,
   :scrolledwindow, :title_radiobutton, :treeview_results]
end