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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
use appgraphics, only: setapplicationdpiaware
#else
!use sdl_render
use dumb_render
use dumb_binary
#endif
use render
use gemini_protocol
use layout
use file_handling
use history
use internal_links, only: handle_internal_url, internal_url
#ifdef WINDOWS
use wsa_network, only: windows_network_startup => startup
#endif
use favorite_handling
use favicon
implicit none
character(256)::initial_site
character(1024)::current_url, desired_url, input
character(1024)::server
#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
logical::redo_layout
integer::return_code
character(256)::return_type
integer, parameter::io = 100
type(line), pointer::first_line
type(location), pointer::locations_visited
type(favorite), dimension(:), pointer::faves
#ifdef WINDOWS
call windows_network_startup()
#endif
#ifdef WINDOWS_GUI
!call setapplicationdpiaware()
#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
#ifdef WINDOWS
initial_site = "lr87://home"
#else
initial_site = "gemini://medusae.space/"
#endif
end if
running = .true.
loaded = .false.
redo_layout = .false.
call r%initialize()
! Load in any favorites
faves => load_favorites()
locations_visited => null()
desired_url = initial_site
current_url = " "
first_line => null()
open(unit=io, form="formatted", status='scratch', access='stream')
do while(running)
! Check for an internal url first
if(index(desired_url, internal_url) == 1) then
if(handle_internal_url(desired_url, io, faves)) then
populated = .true.
loaded = .true.
return_code = STATUS_SUCCESS
return_type = "text/gemini"
call update_status(r, desired_url, return_code)
end if
else if(index(desired_url, "gemini://") /= 1) then
redo_layout = r%report_unsupported_protocol(trim(desired_url))
populated = .false.
loaded = .true.
return_code = STATUS_PROTOCOLFAIL
end if
if(.not. loaded) then
call check_slashless_url(desired_url)
call r%clear_favicon()
call r%report_status("Requesting "//trim(desired_url))
return_code = request_url(desired_url, io, return_type, bh)
populated = .not. is_failure_code(return_code)
call update_status(r, desired_url, return_code)
end if
if(return_code == STATUS_REDIRECT) then
call get_redirect_url(io, desired_url)
loaded = .false.
populated = .false.
else if(return_code == STATUS_INPUT) then
if(handle_input(r, desired_url, io)) then
! Should force a new load
loaded = .false.
else
loaded = .true.
end if
else if(populated) then
current_url = desired_url
desired_url = " "
locations_visited => add_location(locations_visited, current_url)
call get_server_from_url(current_url, server)
call r%set_favicon(get_favicon(server))
if(r%type_supported(return_type)) then
! Only erase if we're loading new lines!
if(associated(first_line)) then
call free_lines(first_line)
end if
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, desired_url)
end if
else if(redo_layout) then
if(associated(first_line)) then
call r%report_status("Performing Layout")
call layout_lines(first_line, r)
call r%status_ready()
end if
redo_layout = .false.
else if(.not. redo_layout .and. is_failure_code(return_code) .and. len_trim(current_url) == 0) then
call r%draw_error("Exiting without initial site")
running = .false.
else if(is_failure_code(return_code)) then
! Only explicitly show an error if it isn't a protocol failure
if(return_code /= STATUS_PROTOCOLFAIL) then
call r%draw_error("Could not connect to "//desired_url)
end if
loaded = .true.
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, desired_url)
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_rewrap)
if(associated(first_line)) then
call r%report_status("Performing Layout")
call clear_line_breaks(first_line)
call layout_lines(first_line, r)
call r%status_ready()
end if
case (render_action_goto)
if(index(input, "://") > 0) then
desired_url = input
else
desired_url = current_url
call handle_relative_url(desired_url, input)
end if
call r%clear_favicon()
loaded = .false.
case (render_action_favorite)
if(is_favorite(faves, current_url)) then
call remove_favorite(faves, current_url)
call r%report_status(trim(current_url)//" removed as favorite")
else
call add_favorite(faves, current_url, current_url)
call r%report_status("Added favorite: "//trim(current_url))
end if
call save_favorites(faves)
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
function load_favorites() result(faves)
use platform, only: get_favorites_file
use favorite_handling, only: read_favorites, favorite
implicit none
type(favorite), dimension(:), pointer::faves
character(260)::filename
integer::ios, loadunit
call get_favorites_file(filename)
open(newunit=loadunit, file=filename, status='old', action='read', iostat=ios)
if(ios == 0) then
faves => read_favorites(loadunit)
close(loadunit)
else
faves => null()
end if
end function load_favorites
subroutine save_favorites(faves)
use platform, only: get_favorites_file
use favorite_handling, only: write_favorites, favorite
implicit none
type(favorite), dimension(:), intent(in), pointer::faves
character(260)::filename
integer::ios, loadunit
call get_favorites_file(filename)
open(newunit=loadunit, file=filename, status='unknown', action='write', iostat=ios)
if(ios == 0) then
call write_favorites(loadunit, faves)
close(loadunit)
end if
end subroutine save_favorites
! Checks to see if the url is just a server name with no
! trailing slash, and fixes it
subroutine check_slashless_url(url)
implicit none
character(*), intent(inout)::url
integer::i, slash_count
slash_count = 0
if(index(url, "://") /= 0) then
do i = 1, len_trim(url)
if(url(i:i) == '/') then
slash_count = slash_count + 1
end if
end do
if(slash_count == 2) then
url(i:i) = "/"
end if
end if
end subroutine check_slashless_url
end program gemini
|
