note description: "Help engine, displays help context, GTK implementation" legal: "See notice at end of class." status: "See notice at end of class." class EB_HELP_ENGINE_IMP inherit EB_HELP_ENGINE_I EB_SHARED_PREFERENCES EB_CONSTANTS EIFFEL_LAYOUT create make feature {NONE} -- Initialization make do end feature -- Access application_name: STRING = "ec"; feature -- Status Report last_show_successful: BOOLEAN -- Was last call to `show' successful? last_error_message: STRING_GENERAL -- Last error message, if any feature -- Basic Operations show (a_help_context: EB_HELP_CONTEXT) -- Show help with context `a_help_context'. local cmd: STRING_32 url: PATH exists: BOOLEAN do cmd := preferences.misc_data.internet_browser_preference.value if cmd.is_empty then last_show_successful := False elseif cmd.substring_index ("$url", 1) <= 0 then last_show_successful := False else cmd.append_character (' ') url := eiffel_layout.docs_path.extended (a_help_context.url) if (create {DIRECTORY}.make_with_path (url)).exists then url := url.extended ("index.html") end exists := (create {RAW_FILE}.make_with_path (url)).exists if exists then cmd.replace_substring_all ("$url", url.name) (create {EXECUTION_ENVIRONMENT}).launch (cmd) last_show_successful := True else last_show_successful := False end end if last_show_successful then last_error_message := Void else last_error_message := Warning_messages.w_help_topic_could_not_be_displayed end end note copyright: "Copyright (c) 1984-2012, Eiffel Software" license: "GPL version 2 (see http://www.eiffel.com/licensing/gpl.txt)" licensing_options: "http://www.eiffel.com/licensing" copying: "[ This file is part of Eiffel Software's Eiffel Development Environment. Eiffel Software's Eiffel Development Environment is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2 of the License (available at the URL listed under "license" above). Eiffel Software's Eiffel Development Environment is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Eiffel Software's Eiffel Development Environment; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA ]" source: "[ Eiffel Software 5949 Hollister Ave., Goleta, CA 93117 USA Telephone 805-685-1006, Fax 805-685-6869 Website http://www.eiffel.com Customer support http://support.eiffel.com ]" end -- class EB_HELP_ENGINE_IMP