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! Copyright (c) 2020 Jeffrey Armstrong <jeff@rainbow-100.com>
!
! Permission is hereby granted, free of charge, to any person obtaining a copy
! of this software and associated documentation files (the "Software"), to deal
! in the Software without restriction, including without limitation the rights
! to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
! copies of the Software, and to permit persons to whom the Software is
! furnished to do so, subject to the following conditions:
!
! The above copyright notice and this permission notice shall be included in
! all copies or substantial portions of the Software.
!
! The Software shall be used for Good, not Evil.
!
! THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
! IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
! FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
! AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
! LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
! OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
! SOFTWARE.
program gemini
use request
#ifdef WINDOWS_GUI
use ag_render, only: appgraphics_renderer
use ag_binary, only: appgraphics_binary_handler
#else
use dumb_render
use dumb_binary
#endif
use render
use gemini_protocol
use layout
use file_handling
use history
#ifdef WINDOWS
use wsa_network, only: windows_network_startup => startup
#endif
implicit none
character(256)::initial_site
character(1024)::current_url, input
type(connection)::conn
#ifdef WINDOWS_GUI
type(appgraphics_renderer)::r
type(appgraphics_binary_handler)::bh
#else
type(dumb_renderer)::r
type(dumb_binary_handler)::bh
#endif
logical::running
logical::loaded
logical::populated
integer::return_code
character(256)::return_type
integer, parameter::io = 100
type(line), pointer::first_line
type(location), pointer::locations_visited
#ifdef WINDOWS
call windows_network_startup()
#endif
if(command_argument_count() > 0) then
call get_command_argument(1, initial_site)
if(index(initial_site, "//") > 0) then
if(index(initial_site, "gemini://") /= 1) then
Print *, "Please provide a gemini URL to start (or nothing at all)"
stop
end if
else
initial_site = "gemini://"//trim(initial_site)
end if
else
initial_site = "gemini://gemini.circumlunar.space/"
end if
running = .true.
loaded = .false.
call r%initialize()
locations_visited => null()
current_url = initial_site
open(unit=io, form="formatted", status="scratch", access='stream')
do while(running)
if(index(current_url, "gemini://") /= 1) then
call r%report_unsupported_protocol(trim(current_url))
populated = .false.
loaded = .true.
return_code = STATUS_LOCALFAIL
end if
if(.not. loaded) then
call r%report_status("Requesting "//trim(current_url))
return_code = request_url(current_url, io, return_type, bh)
populated = .true.
call update_status(r, current_url, return_code)
end if
if(return_code == STATUS_REDIRECT) then
call get_redirect_url(io, current_url)
loaded = .false.
populated = .false.
else if(return_code == STATUS_INPUT) then
if(handle_input(r, current_url, io)) then
! Should force a new load
loaded = .false.
else
loaded = .true.
end if
else if(populated) then
locations_visited => add_location(locations_visited, current_url)
if(r%type_supported(return_type)) then
first_line => load_unit(io, file_type_gemini)
loaded = .true.
call r%new_page()
call r%report_status("Performing Layout")
call layout_lines(first_line, r)
call r%status_ready()
else
call r%draw_error("Cannot display file of type "//return_type)
call back_location(locations_visited, current_url)
end if
end if
do while(loaded .and. running)
select case(r%request_action(input))
case (render_action_quit)
running = .false.
case (render_action_back)
call back_location(locations_visited, current_url)
if(associated(first_line)) then
call free_lines(first_line)
end if
loaded = .false.
case (render_action_layout)
if(associated(first_line)) then
call r%report_status("Performing Layout")
call layout_lines(first_line, r)
call r%status_ready()
end if
case (render_action_goto)
if(index(input, "://") > 0) then
current_url = input
else
call handle_relative_url(current_url, input)
end if
if(associated(first_line)) then
call free_lines(first_line)
end if
loaded = .false.
end select
end do
end do
close(io)
contains
subroutine update_status(r, url, code)
use gemini_protocol
implicit none
class(renderer)::r
character(*), intent(in)::url
integer, intent(in)::code
select case (code)
case (STATUS_LOCALFAIL)
call r%report_status("Network failure loading "//trim(url))
call r%report_displayed_page("...")
case (STATUS_INPUT)
call r%report_status("Ok (input)")
call r%report_displayed_page(url)
case (STATUS_SUCCESS)
call r%report_status("Ok")
call r%report_displayed_page(url)
case (STATUS_REDIRECT)
call r%report_status("Ok (redirect)")
call r%report_displayed_page(url)
case (STATUS_TEMPFAIL)
call r%report_status("Server reports temporary failure")
call r%report_displayed_page("...")
case (STATUS_PERMFAIL)
call r%report_status("Server reports permanent failure")
call r%report_displayed_page("...")
case (STATUS_CERTREQ)
call r%report_status("Server requesting certificate (unsupported)")
call r%report_displayed_page("...")
case (STATUS_BADRESPONSE)
call r%report_status("Bad response code from server")
call r%report_displayed_page("...")
end select
end subroutine update_status
end program gemini
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