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defmodule Chessh.SSH.Client.SelectPaginatePoller do
@callback dynamic_options() :: boolean()
@callback tick_delay_ms() :: integer()
@callback max_displayed_options() :: integer()
@callback max_box_cols() :: integer()
@callback make_process_tuple(selected :: any(), state :: any()) ::
{module :: module(), state :: any()}
@callback initial_options(state :: any()) ::
[{line :: any(), selected :: any()}]
@callback refresh_options_ms() :: integer()
@callback refresh_options(state :: any()) ::
[{line :: any(), selected :: any()}]
@callback next_page_options(state :: any()) ::
[{line :: any(), selected :: any()}]
@callback previous_page_options(state :: any()) ::
[{line :: any(), selected :: any()}]
@callback title() :: [any()]
defmodule State do
defstruct client_pid: nil,
selected_option_idx: 0,
player_session: nil,
options: [],
tick: 0,
cursor: nil,
extra_info: %{}
end
defmacro __using__(_) do
quote do
@behaviour Chessh.SSH.Client.SelectPaginatePoller
use Chessh.SSH.Client.Screen
alias IO.ANSI
alias Chessh.{Utils, PlayerSession}
alias Chessh.SSH.Client.SelectPaginatePoller.State
alias Chessh.SSH.Client.SelectPaginatePoller
require Logger
def init([%State{} = state | _]) do
if dynamic_options() do
Process.send_after(self(), :refresh_options, refresh_options_ms())
end
Process.send_after(self(), :tick, tick_delay_ms())
{:ok, %State{state | options: initial_options(state)}}
end
def handle_info(
:refresh_options,
%State{
selected_option_idx: selected_option_idx,
tick: tick,
client_pid: client_pid
} = state
) do
if dynamic_options() do
options = refresh_options(state)
Process.send_after(self(), :refresh_options, refresh_options_ms())
{:noreply,
%State{
state
| selected_option_idx: min(selected_option_idx, length(options) - 1),
options: options
}}
else
{:noreply, state}
end
end
def handle_info(
:tick,
%State{
tick: tick,
client_pid: client_pid
} = state
) do
Process.send_after(self(), :tick, tick_delay_ms())
if client_pid do
send(client_pid, :refresh)
end
{:noreply, %State{state | tick: tick + 1}}
end
def handle_info(
x,
state
) do
Logger.debug("unknown message in pagination poller - #{inspect(x)}")
{:noreply, state}
end
def render(
width,
height,
%State{
client_pid: client_pid
} = state
) do
send(
client_pid,
{:send_to_ssh, render_state(width, height, state)}
)
state
end
def input(
width,
height,
action,
_data,
%State{
client_pid: client_pid,
options: options,
selected_option_idx: selected_option_idx
} = state
) do
max_item = min(length(options), max_displayed_options())
new_state =
if max_item > 0 do
if action == :return do
{_, selected} = Enum.at(options, selected_option_idx)
{module, state} = make_process_tuple(selected, state)
send(client_pid, {:set_screen_process, module, state})
state
else
if(max_item > 1) do
case action do
:up ->
%State{
state
| selected_option_idx: Utils.wrap_around(selected_option_idx, -1, max_item),
tick: 0
}
:down ->
%State{
state
| selected_option_idx: Utils.wrap_around(selected_option_idx, 1, max_item),
tick: 0
}
:left ->
if dynamic_options(),
do: %State{
state
| options: previous_page_options(state),
selected_option_idx: 0,
tick: 0
}
:right ->
if dynamic_options(),
do: %State{
state
| options: next_page_options(state),
selected_option_idx: 0,
tick: 0
}
_ ->
state
end
else
state
end
end
end
if !(action == :return) do
render(width, height, new_state)
end
new_state
end
defp render_state(
width,
height,
%State{} = state
) do
lines =
title() ++
[""] ++
render_lines(width, height, state) ++
if dynamic_options(), do: ["", "<- Previous | Next ->"], else: []
{y, x} = Utils.center_rect({min(width, max_box_cols()), length(lines)}, {width, height})
[ANSI.clear()] ++
Enum.flat_map(
Enum.zip(0..(length(lines) - 1), lines),
fn {i, line} ->
[
ANSI.cursor(y + i, x),
line
]
end
) ++ [ANSI.home()]
end
defp render_lines(width, _height, %State{
tick: tick,
options: options,
selected_option_idx: selected_option_idx
}) do
if options && length(options) > 0 do
Enum.map(
Enum.zip(0..(max_displayed_options() - 1), options),
fn {i, {line, _}} ->
box_cols = min(max_box_cols(), width) - 2
linelen = String.length(line)
line =
if linelen > box_cols do
delta = max(box_cols - 3 - 1 - if(i == selected_option_idx, do: 4, else: 0), 0)
overflow = linelen - delta
start = if i == selected_option_idx, do: rem(tick, overflow), else: 0
"#{String.slice(line, start..(start + delta))}..."
else
line
end
if i == selected_option_idx do
ANSI.format_fragment(
[:light_cyan, :bright, "♜ #{line} ♜", :reset],
true
)
else
line
end
end
)
else
["Looks like there's nothing here.", "Use Ctrl+b return to the menu."]
end
end
def refresh_options_ms(), do: 3000
def next_page_options(%State{options: options}), do: options
def previous_page_options(%State{options: options}), do: options
def refresh_options(%State{options: options}), do: options
def tick_delay_ms(), do: 1000
def max_displayed_options(), do: 10
def max_box_cols(), do: 90
defoverridable refresh_options_ms: 0,
next_page_options: 1,
previous_page_options: 1,
refresh_options: 1,
tick_delay_ms: 0,
max_displayed_options: 0,
max_box_cols: 0
end
end
end
|
