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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.
module layout
implicit none
integer, parameter::line_type_text = 1
integer, parameter::line_type_preformatted = 2
integer, parameter::line_type_link = 3
integer, parameter::line_type_indicator = 99
type::line
character(len=:), allocatable::text
integer::line_type
integer, dimension(:), pointer::breaks
type(line), pointer::next
end type line
contains
subroutine layout_lines(first_line, rendering_engine)
use render
implicit none
type(line), pointer::first_line
class(renderer)::rendering_engine
type(line), pointer::walker
logical::laying_out
walker => first_line
laying_out = .true.
call rendering_engine%prepare_for_layout()
do while(laying_out)
if(.not. associated(walker%breaks)) then
select case (walker%line_type)
case (line_type_text)
walker%breaks => calculate_wrapping(rendering_engine, walker%text)
case (line_type_preformatted)
walker%breaks => calculate_stop(rendering_engine, walker%text)
end select
end if
select case (walker%line_type)
case (line_type_text)
call render_proportional(rendering_engine, walker%text, walker%breaks)
case (line_type_preformatted)
call render_preformatted(rendering_engine, walker%text, walker%breaks(1))
case (line_type_link)
call render_link(rendering_engine, walker%text)
end select
laying_out = associated(walker%next)
if(laying_out) then
walker => walker%next
end if
end do
call rendering_engine%layout_complete()
end subroutine layout_lines
subroutine clear_line_breaks(first_line)
implicit none
type(line), intent(inout), pointer::first_line
type(line), pointer::walker
walker => first_line
do while(associated(walker))
if(associated(walker%breaks)) then
deallocate(walker%breaks)
walker%breaks => null()
end if
walker => walker%next
end do
end subroutine clear_line_breaks
subroutine free_lines(first_line)
implicit none
type(line), intent(inout), pointer::first_line
type(line), pointer::walker, past
call clear_line_breaks(first_line)
walker => first_line
do while(associated(walker))
if(allocated(walker%text)) then
deallocate(walker%text)
end if
past => walker
walker => walker%next
deallocate(past)
end do
first_line => null()
end subroutine free_lines
end module layout
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