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Versions: 25
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Contents
module Redcar
# A class that holds a cursor navigation history. The maximum length
# defaults to 100.
class NavigationHistory < Array
def initialize
@max_history_size = 100
@current = 0
end
def save(doc)
return if last && last[:path] == doc.path && last[:cursor_offset] == doc.cursor_offset
# Invoking this method means new future is about to be created, so remove old one.
self.slice!(@current...self.size)
ensure_size_less_than_max
self << {:path => doc.path, :cursor_offset => doc.cursor_offset}
@current += 1
end
def can_backward?
return @current > 0
end
def backward
move_current_and_restore(-1) if can_backward?
end
def can_forward?
return @current < self.size - 1
end
def forward
move_current_and_restore(1) if can_forward?
end
private
def ensure_size_less_than_max
while self.size >= @max_history_size
self.delete_at(0)
@current -= 1
end
end
def move_current_and_restore(history_size)
save_current_doc
@current += history_size
restore_hisotry
end
def restore_hisotry
Project::Manager.open_file(self[@current][:path])
new_doc = Redcar.app.focussed_window.focussed_notebook_tab_document
new_doc.cursor_offset = self[@current][:cursor_offset]
new_doc.ensure_cursor_visible
end
def save_current_doc
if win = Redcar.app.focussed_window and cur_doc = win.focussed_notebook_tab_document
history = {:path => cur_doc.path, :cursor_offset => cur_doc.cursor_offset}
if @current < self.size
self[@current] = history
else
save(cur_doc)
@current = self.size - 1
end
end
end
end
end
Version data entries
25 entries across 25 versions & 2 rubygems