sup

lib/sup/modes/thread_view_mode.rb (33963B) - raw

 module Redwood
 
 class ThreadViewMode < LineCursorMode
   ## this holds all info we need to lay out a message
   class MessageLayout
     attr_accessor :top, :bot, :prev, :next, :depth, :width, :state, :color, :star_color, :orig_new, :toggled_state
   end
 
   class ChunkLayout
     attr_accessor :state
   end
 
   HookManager.register "detailed-headers", <<EOS
 Add or remove headers from the detailed header display of a message.
 Variables:
   message: The message whose headers are to be formatted.
   headers: A hash of header (name, value) pairs, initialized to the default
            headers.
 Return value:
   None. The variable 'headers' should be modified in place.
 EOS
 
   HookManager.register "bounce-command", <<EOS
 Determines the command used to bounce a message.
 Variables:
       from: The From header of the message being bounced
             (eg: likely _not_ your address).
         to: The addresses you asked the message to be bounced to as an array.
 Return value:
   A string representing the command to pipe the mail into.  This
   should include the entire command except for the destination addresses,
   which will be appended by sup.
 EOS
 
   HookManager.register "publish", <<EOS
 Executed when a message or a chunk is requested to be published.
 Variables:
      chunk: Redwood::Message or Redwood::Chunk::* to be published.
 Return value:
   None.
 EOS
 
   HookManager.register "goto", <<EOS
 Open the uri given as a parameter.
 Variables:
       uri: The uri
 Return value:
   None.
 EOS
 
   register_keymap do |k|
     k.add :toggle_detailed_header, "Toggle detailed header", 'h'
     k.add :show_header, "Show full message header", 'H'
     k.add :show_message, "Show full message (raw form)", 'V'
     k.add :reload, "Update message in thread", '@'
     k.add :activate_chunk, "Expand/collapse or activate item", :enter
     k.add :expand_all_messages, "Expand/collapse all messages", 'E'
     k.add :edit_draft, "Edit draft", 'e'
     k.add :send_draft, "Send draft", 'y'
     k.add :edit_labels, "Edit or add labels for a thread", 'l'
     k.add :expand_all_quotes, "Expand/collapse all quotes in a message", 'o'
     k.add :jump_to_next_open, "Jump to next open message", 'n'
     k.add :jump_to_next_and_open, "Jump to next message and open", "\C-n"
     k.add :jump_to_prev_open, "Jump to previous open message", 'p'
     k.add :jump_to_prev_and_open, "Jump to previous message and open", "\C-p"
     k.add :align_current_message, "Align current message in buffer", 'z'
     k.add :toggle_starred, "Star or unstar message", '*'
     k.add :toggle_new, "Toggle unread/read status of message", 'N'
 #    k.add :collapse_non_new_messages, "Collapse all but unread messages", 'N'
     k.add :reply, "Reply to a message", 'r'
     k.add :reply_all, "Reply to all participants of this message", 'G'
     k.add :forward, "Forward a message or attachment", 'f'
     k.add :bounce, "Bounce message to other recipient(s)", '!'
     k.add :alias, "Edit alias/nickname for a person", 'i'
     k.add :edit_as_new, "Edit message as new", 'D'
     k.add :save_to_disk, "Save message/attachment to disk", 's'
     k.add :save_all_to_disk, "Save all attachments to disk", 'A'
     k.add :publish, "Publish message/attachment using publish-hook", 'P'
     k.add :search, "Search for messages from particular people", 'S'
     k.add :compose, "Compose message to person", 'm'
     k.add :subscribe_to_list, "Subscribe to/unsubscribe from mailing list", "("
     k.add :unsubscribe_from_list, "Subscribe to/unsubscribe from mailing list", ")"
     k.add :pipe_message, "Pipe message or attachment to a shell command", '|'
 
     k.add :archive_and_next, "Archive this thread, kill buffer, and view next", 'a'
     k.add :delete_and_next, "Delete this thread, kill buffer, and view next", 'd'
     k.add :kill_and_next, "Kill this thread, kill buffer, and view next", '&'
     k.add :toggle_wrap, "Toggle wrapping of text", 'w'
 
     k.add :goto_uri, "Goto uri under cursor", 'g'
     k.add :fetch_and_verify, "Fetch the PGP key on poolserver and re-verify message", "v"
 
     k.add_multi "(a)rchive/(d)elete/mark as (s)pam/mark as u(N)read:", '.' do |kk|
       kk.add :archive_and_kill, "Archive this thread and kill buffer", 'a'
       kk.add :delete_and_kill, "Delete this thread and kill buffer", 'd'
       kk.add :kill_and_kill, "Kill this thread and kill buffer", '&'
       kk.add :spam_and_kill, "Mark this thread as spam and kill buffer", 's'
       kk.add :unread_and_kill, "Mark this thread as unread and kill buffer", 'N'
       kk.add :do_nothing_and_kill, "Just kill this buffer", '.'
     end
 
     k.add_multi "(a)rchive/(d)elete/mark as (s)pam/mark as u(N)read/do (n)othing:", ',' do |kk|
       kk.add :archive_and_next, "Archive this thread, kill buffer, and view next", 'a'
       kk.add :delete_and_next, "Delete this thread, kill buffer, and view next", 'd'
       kk.add :kill_and_next, "Kill this thread, kill buffer, and view next", '&'
       kk.add :spam_and_next, "Mark this thread as spam, kill buffer, and view next", 's'
       kk.add :unread_and_next, "Mark this thread as unread, kill buffer, and view next", 'N'
       kk.add :do_nothing_and_next, "Kill buffer, and view next", 'n', ','
     end
 
     k.add_multi "(a)rchive/(d)elete/mark as (s)pam/mark as u(N)read/do (n)othing:", ']' do |kk|
       kk.add :archive_and_prev, "Archive this thread, kill buffer, and view previous", 'a'
       kk.add :delete_and_prev, "Delete this thread, kill buffer, and view previous", 'd'
       kk.add :kill_and_prev, "Kill this thread, kill buffer, and view previous", '&'
       kk.add :spam_and_prev, "Mark this thread as spam, kill buffer, and view previous", 's'
       kk.add :unread_and_prev, "Mark this thread as unread, kill buffer, and view previous", 'N'
       kk.add :do_nothing_and_prev, "Kill buffer, and view previous", 'n', ']'
     end
   end
 
   ## there are a couple important instance variables we hold to format
   ## the thread and to provide line-based functionality. @layout is a
   ## map from Messages to MessageLayouts, and @chunk_layout from
   ## Chunks to ChunkLayouts.  @message_lines is a map from row #s to
   ## Message objects.  @chunk_lines is a map from row #s to Chunk
   ## objects. @person_lines is a map from row #s to Person objects.
 
   def initialize thread, hidden_labels=[], index_mode=nil
     @indent_spaces = $config[:indent_spaces]
     super :slip_rows => $config[:slip_rows]
     @thread = thread
     @hidden_labels = hidden_labels
 
     ## used for dispatch-and-next
     @index_mode = index_mode
     @dying = false
 
     @layout = SavingHash.new { MessageLayout.new }
     @chunk_layout = SavingHash.new { ChunkLayout.new }
     earliest, latest = nil, nil
     latest_date = nil
     altcolor = false
 
     @thread.each do |m, d, p|
       next unless m
       earliest ||= m
       @layout[m].state = initial_state_for m
       @layout[m].toggled_state = false
       @layout[m].color = altcolor ? :alternate_patina_color : :message_patina_color
       @layout[m].star_color = altcolor ? :alternate_starred_patina_color : :starred_patina_color
       @layout[m].orig_new = m.has_label? :read
       altcolor = !altcolor
       if latest_date.nil? || m.date > latest_date
         latest_date = m.date
         latest = m
       end
     end
 
     @wrap = true
 
     @layout[latest].state = :open if @layout[latest].state == :closed
     @layout[earliest].state = :detailed if earliest.has_label?(:unread) || @thread.size == 1
   end
 
   def toggle_wrap
     @wrap = !@wrap
     regen_text
     buffer.mark_dirty if buffer
   end
 
   def draw_line ln, opts={}
     if ln == curpos
       super ln, :highlight => true
     else
       super
     end
   end
   def lines; @text.length; end
   def [] i; @text[i]; end
 
   ## a little hacky---since regen_text can depend on buffer features like the
   ## content_width, we don't call it in the constructor, and instead call it
   ## here, which is set before we're responsible for drawing ourself.
   def buffer= b
     super
     regen_text
   end
 
   def show_header
     m = @message_lines[curpos] or return
     BufferManager.spawn_unless_exists("Full header for #{m.id}") do
       TextMode.new m.raw_header.ascii
     end
   end
 
   def show_message
     m = @message_lines[curpos] or return
     BufferManager.spawn_unless_exists("Raw message for #{m.id}") do
       TextMode.new m.raw_message.ascii
     end
   end
 
   def toggle_detailed_header
     m = @message_lines[curpos] or return
     @layout[m].state = (@layout[m].state == :detailed ? :open : :detailed)
     update
   end
 
   def reload
     update
   end
 
   def reply type_arg=nil
     m = @message_lines[curpos] or return
     mode = ReplyMode.new m, type_arg
     BufferManager.spawn "Reply to #{m.subj}", mode
   end
 
   def reply_all; reply :all; end
 
   def subscribe_to_list
     m = @message_lines[curpos] or return
     if m.list_subscribe && m.list_subscribe =~ /<mailto:(.*?)(\?subject=(.*?))?>/
       ComposeMode.spawn_nicely :from => AccountManager.account_for(m.recipient_email), :to => [Person.from_address($1)], :subj => ($3 || "subscribe")
     else
       BufferManager.flash "Can't find List-Subscribe header for this message."
     end
   end
 
   def unsubscribe_from_list
     m = @message_lines[curpos] or return
     BufferManager.flash "Can't find List-Unsubscribe header for this message." unless m.list_unsubscribe
 
     if m.list_unsubscribe =~ /<mailto:(.*?)(\?subject=(.*?))?>/
       ComposeMode.spawn_nicely :from => AccountManager.account_for(m.recipient_email), :to => [Person.from_address($1)], :subj => ($3 || "unsubscribe")
     elsif m.list_unsubscribe =~ /<(http.*)?>/
       unless HookManager.enabled? "goto"
         BufferManager.flash "You must add a goto.rb hook before you can goto an unsubscribe URI."
         return
       end
 
       begin
         u = URI.parse($1)
       rescue URI::InvalidURIError
         BufferManager.flash("Invalid unsubscribe link")
         return
       end
 
       HookManager.run "goto", :uri => Shellwords.escape(u.to_s)
     end
   end
 
   def forward
     if(chunk = @chunk_lines[curpos]) && chunk.is_a?(Chunk::Attachment)
       ForwardMode.spawn_nicely :attachments => [chunk]
     elsif(m = @message_lines[curpos])
       ForwardMode.spawn_nicely :message => m
     end
   end
 
   def bounce
     m = @message_lines[curpos] or return
     to = BufferManager.ask_for_contacts(:people, "Bounce To: ") or return
 
     defcmd = AccountManager.default_account.bounce_sendmail
 
     cmd = case (hookcmd = HookManager.run "bounce-command", :from => m.from, :to => to)
           when nil, /^$/ then defcmd
           else hookcmd
           end + ' ' + to.map { |t| t.email }.join(' ')
 
     bt = to.size > 1 ? "#{to.size} recipients" : to[0].to_s
 
     if BufferManager.ask_yes_or_no "Really bounce to #{bt}?"
       debug "bounce command: #{cmd}"
       begin
         IO.popen(cmd, 'w') do |sm|
           sm.puts m.raw_message
         end
         raise SendmailCommandFailed, "Couldn't execute #{cmd}" unless $? == 0
         m.add_label :forwarded
         Index.save_message m
       rescue SystemCallError, SendmailCommandFailed => e
         warn "problem sending mail: #{e.message}"
         BufferManager.flash "Problem sending mail: #{e.message}"
       end
     end
   end
 
   include CanAliasContacts
   def alias
     p = @person_lines[curpos] or return
     alias_contact p
     update
   end
 
   def search
     p = @person_lines[curpos] or return
     mode = PersonSearchResultsMode.new [p]
     BufferManager.spawn "Search for #{p.name}", mode
   end
 
   def compose
     p = @person_lines[curpos]
     if p
       ComposeMode.spawn_nicely :to_default => p
     else
       ComposeMode.spawn_nicely
     end
   end
 
   def edit_labels
     old_labels = @thread.labels
     reserved_labels = old_labels.select { |l| LabelManager::RESERVED_LABELS.include? l }
     new_labels = BufferManager.ask_for_labels :label, "Labels for thread: ", @thread.labels.sort_by {|x| x.to_s}
 
     return unless new_labels
     @thread.labels = Set.new(reserved_labels) + new_labels
     new_labels.each { |l| LabelManager << l }
     update
     UpdateManager.relay self, :labeled, @thread.first
     Index.save_thread @thread
     UndoManager.register "labeling thread" do
       @thread.labels = old_labels
       Index.save_thread @thread
       UpdateManager.relay self, :labeled, @thread.first
     end
   end
 
   def toggle_starred
     m = @message_lines[curpos] or return
     toggle_label m, :starred
   end
 
   def toggle_new
     m = @message_lines[curpos] or return
     toggle_label m, :unread
   end
 
   def toggle_label m, label
     if m.has_label? label
       m.remove_label label
     else
       m.add_label label
     end
     ## TODO: don't recalculate EVERYTHING just to add a stupid little
     ## star to the display
     update
     UpdateManager.relay self, :single_message_labeled, m
     Index.save_thread @thread
   end
 
   ## called when someone presses enter when the cursor is highlighting
   ## a chunk. for expandable chunks (including messages) we toggle
   ## open/closed state; for viewable chunks (like attachments) we
   ## view.
   def activate_chunk
     chunk = @chunk_lines[curpos] or return
     if chunk.is_a? Chunk::Text
       ## if the cursor is over a text region, expand/collapse the
       ## entire message
       chunk = @message_lines[curpos]
     end
     layout = if chunk.is_a?(Message)
       @layout[chunk]
     elsif chunk.expandable?
       @chunk_layout[chunk]
     end
     if layout
       layout.state = (layout.state != :closed ? :closed : :open)
       #cursor_down if layout.state == :closed # too annoying
       update
     elsif chunk.viewable?
       view chunk
     end
     if chunk.is_a?(Message) && $config[:jump_to_open_message]
       jump_to_message chunk
       jump_to_next_open if layout.state == :closed
     end
   end
 
   def edit_as_new
     m = @message_lines[curpos] or return
     mode = ComposeMode.new(:body => m.quotable_body_lines, :to => m.to, :cc => m.cc, :subj => m.subj, :bcc => m.bcc, :refs => m.refs, :replytos => m.replytos)
     BufferManager.spawn "edit as new", mode
     mode.default_edit_message
   end
 
   def save_to_disk
     chunk = @chunk_lines[curpos] or return
     case chunk
     when Chunk::Attachment
       default_dir = $config[:default_attachment_save_dir]
       default_dir = ENV["HOME"] if default_dir.nil? || default_dir.empty?
       default_fn = File.expand_path File.join(default_dir, chunk.filesafe_filename)
       fn = BufferManager.ask_for_filename :filename, "Save attachment to file or directory: ", default_fn, true
 
       # if user selects directory use file name from message
       if fn and File.directory? fn
         fn = File.join(fn, chunk.filename)
       end
 
       save_to_file(fn) { |f| f.print chunk.raw_content } if fn
     else
       m = @message_lines[curpos]
       fn = BufferManager.ask_for_filename :filename, "Save message to file: "
       return unless fn
       save_to_file(fn) do |f|
         m.each_raw_message_line { |l| f.print l }
       end
     end
   end
 
   def save_all_to_disk
     m = @message_lines[curpos] or return
     default_dir = ($config[:default_attachment_save_dir] || ".")
     folder = BufferManager.ask_for_filename :filename, "Save all attachments to folder: ", default_dir, true
     return unless folder
 
     num = 0
     num_errors = 0
     m.chunks.each do |chunk|
       next unless chunk.is_a?(Chunk::Attachment)
       fn = File.join(folder, chunk.filesafe_filename)
       num_errors += 1 unless save_to_file(fn, false) { |f| f.print chunk.raw_content }
       num += 1
     end
 
     if num == 0
       BufferManager.flash "Didn't find any attachments!"
     else
       if num_errors == 0
         BufferManager.flash "Wrote #{num.pluralize 'attachment'} to #{folder}."
       else
         BufferManager.flash "Wrote #{(num - num_errors).pluralize 'attachment'} to #{folder}; couldn't write #{num_errors} of them (see log)."
       end
     end
   end
 
   def publish
     chunk = @chunk_lines[curpos] or return
     if HookManager.enabled? "publish"
       HookManager.run "publish", :chunk => chunk
     else
       BufferManager.flash "Publishing hook not defined."
     end
   end
 
   def edit_draft
     m = @message_lines[curpos] or return
     if m.is_draft?
       mode = ResumeMode.new m
       BufferManager.spawn "Edit message", mode
       BufferManager.kill_buffer self.buffer
       mode.default_edit_message
     else
       BufferManager.flash "Not a draft message!"
     end
   end
 
   def send_draft
     m = @message_lines[curpos] or return
     if m.is_draft?
       mode = ResumeMode.new m
       BufferManager.spawn "Send message", mode
       BufferManager.kill_buffer self.buffer
       mode.send_message
     else
       BufferManager.flash "Not a draft message!"
     end
   end
 
   def jump_to_first_open
     m = @message_lines[0] or return
     if @layout[m].state != :closed
       jump_to_message m#, true
     else
       jump_to_next_open #true
     end
   end
 
   def jump_to_next_and_open
     return continue_search_in_buffer if in_search? # err.. don't know why im doing this
 
     m = (curpos ... @message_lines.length).argfind { |i| @message_lines[i] }
     return unless m
 
     nextm = @layout[m].next
     return unless nextm
 
     if @layout[m].toggled_state == true
       @layout[m].state = :closed
       @layout[m].toggled_state = false
       update
     end
 
     if @layout[nextm].state == :closed
       @layout[nextm].state = :open
       @layout[nextm].toggled_state = true
     end
 
     jump_to_message nextm if nextm
 
     update if @layout[nextm].toggled_state
   end
 
   def jump_to_next_open force_alignment=nil
     return continue_search_in_buffer if in_search? # hack: allow 'n' to apply to both operations
     m = (curpos ... @message_lines.length).argfind { |i| @message_lines[i] }
     return unless m
     while nextm = @layout[m].next
       break if @layout[nextm].state != :closed
       m = nextm
     end
     jump_to_message nextm, force_alignment if nextm
   end
 
   def align_current_message
     m = @message_lines[curpos] or return
     jump_to_message m, true
   end
 
   def jump_to_prev_and_open force_alignment=nil
     m = (0 .. curpos).to_a.reverse.argfind { |i| @message_lines[i] }
     return unless m
 
     nextm = @layout[m].prev
     return unless nextm
 
     if @layout[m].toggled_state == true
       @layout[m].state = :closed
       @layout[m].toggled_state = false
       update
     end
 
     if @layout[nextm].state == :closed
       @layout[nextm].state = :open
       @layout[nextm].toggled_state = true
     end
 
     jump_to_message nextm if nextm
     update if @layout[nextm].toggled_state
   end
 
   def jump_to_prev_open
     m = (0 .. curpos).to_a.reverse.argfind { |i| @message_lines[i] } # bah, .to_a
     return unless m
     ## jump to the top of the current message if we're in the body;
     ## otherwise, to the previous message
 
     top = @layout[m].top
     if curpos == top
       while(prevm = @layout[m].prev)
         break if @layout[prevm].state != :closed
         m = prevm
       end
       jump_to_message prevm if prevm
     else
       jump_to_message m
     end
   end
 
   def jump_to_message m, force_alignment=false
     l = @layout[m]
 
     ## boundaries of the message
     message_left = l.depth * @indent_spaces
     message_right = message_left + l.width
 
     ## calculate leftmost colum
     left = if force_alignment # force mode: align exactly
       message_left
     else # regular: minimize cursor movement
       ## leftmost and rightmost are boundaries of all valid left-column
       ## alignments.
       leftmost = [message_left, message_right - buffer.content_width + 1].min
       rightmost = message_left
       leftcol.clamp(leftmost, rightmost)
     end
 
     jump_to_line l.top    # move vertically
     jump_to_col left      # move horizontally
     set_cursor_pos l.top  # set cursor pos
   end
 
   def expand_all_messages
     @global_message_state ||= :closed
     @global_message_state = (@global_message_state == :closed ? :open : :closed)
     @layout.each { |m, l| l.state = @global_message_state }
     update
   end
 
   def collapse_non_new_messages
     @layout.each { |m, l| l.state = l.orig_new ? :open : :closed }
     update
   end
 
   def expand_all_quotes
     if(m = @message_lines[curpos])
       quotes = m.chunks.select { |c| (c.is_a?(Chunk::Quote) || c.is_a?(Chunk::Signature)) && c.lines.length > 1 }
       numopen = quotes.inject(0) { |s, c| s + (@chunk_layout[c].state == :open ? 1 : 0) }
       newstate = numopen > quotes.length / 2 ? :closed : :open
       quotes.each { |c| @chunk_layout[c].state = newstate }
       update
     end
   end
 
   def cleanup
     @layout = @chunk_layout = @text = nil # for good luck
   end
 
   def archive_and_kill; archive_and_then :kill end
   def spam_and_kill; spam_and_then :kill end
   def delete_and_kill; delete_and_then :kill end
   def kill_and_kill; kill_and_then :kill end
   def unread_and_kill; unread_and_then :kill end
   def do_nothing_and_kill; do_nothing_and_then :kill end
 
   def archive_and_next; archive_and_then :next end
   def spam_and_next; spam_and_then :next end
   def delete_and_next; delete_and_then :next end
   def kill_and_next; kill_and_then :next end
   def unread_and_next; unread_and_then :next end
   def do_nothing_and_next; do_nothing_and_then :next end
 
   def archive_and_prev; archive_and_then :prev end
   def spam_and_prev; spam_and_then :prev end
   def delete_and_prev; delete_and_then :prev end
   def kill_and_prev; kill_and_then :prev end
   def unread_and_prev; unread_and_then :prev end
   def do_nothing_and_prev; do_nothing_and_then :prev end
 
   def archive_and_then op
     dispatch op do
       @thread.remove_label :inbox
       UpdateManager.relay self, :archived, @thread.first
       Index.save_thread @thread
       UndoManager.register "archiving 1 thread" do
         @thread.apply_label :inbox
         Index.save_thread @thread
         UpdateManager.relay self, :unarchived, @thread.first
       end
     end
   end
 
   def spam_and_then op
     dispatch op do
       @thread.apply_label :spam
       UpdateManager.relay self, :spammed, @thread.first
       Index.save_thread @thread
       UndoManager.register "marking 1 thread as spam" do
         @thread.remove_label :spam
         Index.save_thread @thread
         UpdateManager.relay self, :unspammed, @thread.first
       end
     end
   end
 
   def delete_and_then op
     dispatch op do
       @thread.apply_label :deleted
       UpdateManager.relay self, :deleted, @thread.first
       Index.save_thread @thread
       UndoManager.register "deleting 1 thread" do
         @thread.remove_label :deleted
         Index.save_thread @thread
         UpdateManager.relay self, :undeleted, @thread.first
       end
     end
   end
 
   def kill_and_then op
     dispatch op do
       @thread.apply_label :killed
       UpdateManager.relay self, :killed, @thread.first
       Index.save_thread @thread
       UndoManager.register "killed 1 thread" do
         @thread.remove_label :killed
         Index.save_thread @thread
         UpdateManager.relay self, :unkilled, @thread.first
       end
     end
   end
 
   def unread_and_then op
     dispatch op do
       @thread.apply_label :unread
       UpdateManager.relay self, :unread, @thread.first
       Index.save_thread @thread
     end
   end
 
   def do_nothing_and_then op
     dispatch op
   end
 
   def dispatch op
     return if @dying
     @dying = true
 
     l = lambda do
       yield if block_given?
       BufferManager.kill_buffer_safely buffer
     end
 
     case op
     when :next
       @index_mode.launch_next_thread_after @thread, &l
     when :prev
       @index_mode.launch_prev_thread_before @thread, &l
     when :kill
       l.call
     else
       raise ArgumentError, "unknown thread dispatch operation #{op.inspect}"
     end
   end
   private :dispatch
 
   def pipe_message
     chunk = @chunk_lines[curpos]
     chunk = nil unless chunk.is_a?(Chunk::Attachment)
     message = @message_lines[curpos] unless chunk
 
     return unless chunk || message
 
     command = BufferManager.ask(:shell, "pipe command: ")
     return if command.nil? || command.empty?
 
     output, success = pipe_to_process(command) do |stream|
       if chunk
         stream.print chunk.raw_content
       else
         message.each_raw_message_line { |l| stream.print l }
       end
     end
 
     unless success
       BufferManager.flash "Invalid command: '#{command}' is not an executable"
       return
     end
 
     if output
       BufferManager.spawn "Output of '#{command}'", TextMode.new(output.ascii)
     else
       BufferManager.flash "'#{command}' done!"
     end
   end
 
 
   def status
     user_labels = @thread.labels.to_a.map do |l|
       l.to_s if LabelManager.user_defined_labels.member?(l)
     end.compact.join(",")
     user_labels = (user_labels.empty? and "" or "<#{user_labels}>")
     [user_labels, super].join(" -- ")
   end
 
   def goto_uri
     unless (chunk = @chunk_lines[curpos])
       BufferManager.flash "No URI found."
       return
     end
     unless HookManager.enabled? "goto"
       BufferManager.flash "You must add a goto.rb hook before you can goto a URI."
       return
     end
 
     # @text is a list of lines with this format:
     # [
     #   [[:text_color, "Some text"]]
     #   [[:text_color, " continued here"]]
     # ]
 
     linetext = @text.slice(curpos, @text.length).flatten(1)
       .take_while{|d| [:text_color, :sig_color].include?(d[0]) and d[1].strip != ""} # Only take up to the first "" alone on its line
       .map{|d| d[1].strip}.join("").strip
 
     found = false
     URI.extract(linetext || "").each do |match|
       begin
         u = URI.parse(match)
         next unless u.absolute?
         next unless ["http", "https"].include?(u.scheme)
 
         reallink = Shellwords.escape(u.to_s)
         BufferManager.flash "Going to #{reallink} ..."
         HookManager.run "goto", :uri => reallink
         BufferManager.completely_redraw_screen
         found = true
 
       rescue URI::InvalidURIError => e
         debug "not a uri: #{e}"
         # Do nothing, this is an ok flow
       end
     end
     BufferManager.flash "No URI found." unless found
   end
 
   def fetch_and_verify
     message = @message_lines[curpos]
     crypto_chunk = message.chunks.select {|chunk| chunk.is_a?(Chunk::CryptoNotice)}.first
     return unless crypto_chunk
     return unless crypto_chunk.unknown_fingerprint
 
     BufferManager.flash "Retrieving key #{crypto_chunk.unknown_fingerprint} ..."
 
     error = CryptoManager.retrieve crypto_chunk.unknown_fingerprint
 
     if error
       BufferManager.flash "Couldn't retrieve key: #{error.to_s}"
     else
       BufferManager.flash "Key #{crypto_chunk.unknown_fingerprint} successfully retrieved !"
     end
 
     # Re-trigger gpg verification
     message.reload_from_source!
     update
   end
 
 private
 
   def initial_state_for m
     if m.has_label?(:starred) || m.has_label?(:unread)
       :open
     else
       :closed
     end
   end
 
   def update
     regen_text
     buffer.mark_dirty if buffer
   end
 
   ## here we generate the actual content lines. we accumulate
   ## everything into @text, and we set @chunk_lines and
   ## @message_lines, and we update @layout.
   def regen_text
     @text = []
     @chunk_lines = []
     @message_lines = []
     @person_lines = []
 
     prevm = nil
     @thread.each do |m, depth, parent|
       unless m.is_a? Message # handle nil and :fake_root
         @text += chunk_to_lines m, nil, @text.length, depth, parent
         next
       end
       l = @layout[m]
 
       ## is this still necessary?
       next unless @layout[m].state # skip discarded drafts
 
       ## build the patina
       text = chunk_to_lines m, l.state, @text.length, depth, parent, l.color, l.star_color
 
       l.top = @text.length
       l.bot = @text.length + text.length # updated below
       l.prev = prevm
       l.next = nil
       l.depth = depth
       # l.state we preserve
       l.width = 0 # updated below
       @layout[l.prev].next = m if l.prev
 
       (0 ... text.length).each do |i|
         @chunk_lines[@text.length + i] = m
         @message_lines[@text.length + i] = m
       end
 
       @text += text
       prevm = m
       if l.state != :closed
         m.chunks.each do |c|
           cl = @chunk_layout[c]
 
           ## set the default state for chunks
           cl.state ||=
             if c.expandable? && c.respond_to?(:initial_state)
               c.initial_state
             else
               :closed
             end
 
           text = chunk_to_lines c, cl.state, @text.length, depth
           (0 ... text.length).each do |i|
             @chunk_lines[@text.length + i] = c
             @message_lines[@text.length + i] = m
             lw = text[i].flatten.select { |x| x.is_a? String }.map { |x| x.display_length }.sum - (depth * @indent_spaces)
             l.width = lw if lw > l.width
           end
           @text += text
         end
         @layout[m].bot = @text.length
       end
     end
   end
 
   def message_patina_lines m, state, start, parent, prefix, color, star_color
     prefix_widget = [color, prefix]
 
     open_widget = [color, (state == :closed ? "+ " : "- ")]
     new_widget = [color, (m.has_label?(:unread) ? "N" : " ")]
     starred_widget = if m.has_label?(:starred)
         [star_color, "*"]
       else
         [color, " "]
       end
     attach_widget = [color, (m.has_label?(:attachment) ? "@" : " ")]
 
     case state
     when :open
       @person_lines[start] = m.from
       [[prefix_widget, open_widget, new_widget, attach_widget, starred_widget,
         [color,
             "#{m.from ? m.from.mediumname.fix_encoding! : '?'} to #{m.recipients.map { |l| l.shortname.fix_encoding! }.join(', ')} #{m.date.to_nice_s.fix_encoding!} (#{m.date.to_nice_distance_s.fix_encoding!})"]]]
 
     when :closed
       @person_lines[start] = m.from
       [[prefix_widget, open_widget, new_widget, attach_widget, starred_widget,
         [color,
         "#{m.from ? m.from.mediumname.fix_encoding! : '?'}, #{m.date.to_nice_s.fix_encoding!} (#{m.date.to_nice_distance_s.fix_encoding!})  #{m.snippet ? m.snippet.fix_encoding! : ''}"]]]
 
     when :detailed
       @person_lines[start] = m.from
       from_line = [[prefix_widget, open_widget, new_widget, attach_widget, starred_widget,
           [color, "From: #{m.from ? format_person(m.from) : '?'}"]]]
 
       addressee_lines = []
       unless m.to.empty?
         m.to.each_with_index { |p, i| @person_lines[start + addressee_lines.length + from_line.length + i] = p }
         addressee_lines += format_person_list "   To: ", m.to
       end
       unless m.cc.empty?
         m.cc.each_with_index { |p, i| @person_lines[start + addressee_lines.length + from_line.length + i] = p }
         addressee_lines += format_person_list "   Cc: ", m.cc
       end
       unless m.bcc.empty?
         m.bcc.each_with_index { |p, i| @person_lines[start + addressee_lines.length + from_line.length + i] = p }
         addressee_lines += format_person_list "   Bcc: ", m.bcc
       end
 
       headers = {
         "Date" => "#{m.date.to_message_nice_s} (#{m.date.to_nice_distance_s})",
         "Subject" => m.subj
       }
 
       show_labels = @thread.labels - LabelManager::HIDDEN_RESERVED_LABELS
       unless show_labels.empty?
         headers["Labels"] = show_labels.map { |x| x.to_s }.sort.join(', ')
       end
       if parent
         headers["In reply to"] = "#{parent.from.mediumname}'s message of #{parent.date.to_message_nice_s}"
       end
 
       HookManager.run "detailed-headers", :message => m, :headers => headers
 
       from_line + (addressee_lines + headers.map { |k, v| "   #{k}: #{v}" }).map { |l| [[color, prefix + "  " + l]] }
     end
   end
 
   def format_person_list prefix, people
     ptext = people.map { |p| format_person p }
     pad = " " * prefix.display_length
     [prefix + ptext.first + (ptext.length > 1 ? "," : "")] +
       ptext[1 .. -1].map_with_index do |e, i|
         pad + e + (i == ptext.length - 1 ? "" : ",")
       end
   end
 
   def format_person p
     p.longname + (ContactManager.is_aliased_contact?(p) ? " (#{ContactManager.alias_for p})" : "")
   end
 
   def maybe_wrap_text lines
     if @wrap
       config_width = $config[:wrap_width]
       if config_width and config_width != 0
         width = [config_width, buffer.content_width].min
       else
         width = buffer.content_width
       end
       # lines can apparently be both String and Array, convert to Array for map.
       if lines.kind_of? String
         lines = lines.lines.to_a
       end
       lines = lines.map { |l| l.chomp.wrap width if l }.flatten
     end
     return lines
   end
 
   ## todo: check arguments on this overly complex function
   def chunk_to_lines chunk, state, start, depth, parent=nil, color=nil, star_color=nil
     prefix = " " * @indent_spaces * depth
     case chunk
     when :fake_root
       [[[:missing_message_color, "#{prefix}<one or more unreceived messages>"]]]
     when nil
       [[[:missing_message_color, "#{prefix}<an unreceived message>"]]]
     when Message
       message_patina_lines(chunk, state, start, parent, prefix, color, star_color) +
         (chunk.is_draft? ? [[[:draft_notification_color, prefix + " >>> This message is a draft. Hit 'e' to edit, 'y' to send. <<<"]]] : [])
 
     else
       raise "Bad chunk: #{chunk.inspect}" unless chunk.respond_to?(:inlineable?) ## debugging
       if chunk.inlineable?
         lines = maybe_wrap_text(chunk.lines)
         lines.map { |line| [[chunk.color, "#{prefix}#{line}"]] }
       elsif chunk.expandable?
         case state
         when :closed
           [[[chunk.patina_color, "#{prefix}+ #{chunk.patina_text}"]]]
         when :open
           lines = maybe_wrap_text(chunk.lines)
           [[[chunk.patina_color, "#{prefix}- #{chunk.patina_text}"]]] + lines.map { |line| [[chunk.color, "#{prefix}#{line}"]] }
         end
       else
         [[[chunk.patina_color, "#{prefix}x #{chunk.patina_text}"]]]
       end
     end
   end
 
   def view chunk
     BufferManager.flash "viewing #{chunk.content_type} attachment..."
     success = chunk.view!
     BufferManager.erase_flash
     BufferManager.completely_redraw_screen
     unless success
       BufferManager.spawn "Attachment: #{chunk.filename}", TextMode.new(chunk.to_s.ascii, chunk.filename)
       BufferManager.flash "Couldn't execute view command, viewing as text."
     end
   end
 end
 
 end