application_helper.rb
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# Methods added to this helper will be available to all templates in the application.
module ApplicationHelper
# Directories to be rejected of the directories list when needed.
# TODO I think the better way is create a Dir class method that returns a list of files of a given path
REJECTED_DIRS = %w[
.
..
.svn
]
ICONS_DIR_PATH = "#{RAILS_ROOT}/public/icons"
THEME_DIR_PATH = "#{RAILS_ROOT}/public/themes"
# Generate a select option to choose one of the available themes.
# The available themes are those in 'public/themes'
def select_theme(object, chosen_theme = nil)
return '' if object.nil?
available_themes = Dir.new("#{THEME_DIR_PATH}").to_a - REJECTED_DIRS
theme_options = options_for_select(available_themes.map{|theme| [theme, theme] }, chosen_theme)
select_tag('theme_name', theme_options ) +
change_theme('theme_name', object)
end
# Generate a observer to reload a page when a theme is selected
def change_theme(observed_field, object)
observe_field( observed_field,
:url => {:action => 'set_default_theme'},
:with =>"'theme_name=' + escape(value) + '&object_id=' + escape(#{object.id})",
:complete => "document.location.reload();"
)
end
# Generate a select option to choose one of the available icons themes.
# The available icons themes are those in 'public/icons'
def select_icons_theme(object, chosen_icons_theme = nil)
return '' if object.nil?
available_icons_themes = Dir.new("#{ICONS_DIR_PATH}").to_a - REJECTED_DIRS
icons_theme_options = options_for_select(available_icons_themes.map{|icons_theme| [icons_theme, icons_theme] }, chosen_icons_theme)
select_tag('icons_theme_name', icons_theme_options ) +
change_icons_theme('icons_theme_name', object)
end
# Generate a observer to reload a page when a icons theme is selected
def change_icons_theme(observed_field, object)
observe_field( observed_field,
:url => {:action => 'set_default_icons_theme'},
:with =>"'icons_theme_name=' + escape(value) + '&object_id=' + escape(#{object.id})",
:complete => "document.location.reload();"
)
end
#Display a given icon passed as argument
#The icon path should be '/icons/{icons_theme}/{icon_image}'
def display_icon(icon , icons_theme = "default", options = {})
image_tag("/icons/#{icons_theme}/#{icon}", options)
end
# Load all the css files of a existing theme with the theme_name passed as argument.
#
# The files loaded are in the path:
#
# 'public/themes/#{theme_name}/*'
# If a invalid theme it's passed the 'default' theme is applied
def stylesheet_link_tag_theme(theme_name)
if !File.exists? "#{THEME_DIR_PATH}/#{theme_name}"
flash[:notice] = _("The theme %s it's not a valid theme") % theme_name
theme_name = 'default'
end
d = Dir.new("#{THEME_DIR_PATH}/#{theme_name}/").to_a - REJECTED_DIRS
d.map do |filename|
stylesheet_link_tag("/themes/#{theme_name}/#{filename}")
end
end
end