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|
------------------------------------------------------------------------------
-- --
-- GNAT ncurses Binding Samples --
-- --
-- ncurses --
-- --
-- B O D Y --
-- --
------------------------------------------------------------------------------
-- Copyright (c) 2000 Free Software Foundation, Inc. --
-- --
-- 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, distribute with modifications, 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 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 ABOVE 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. --
-- --
-- Except as contained in this notice, the name(s) of the above copyright --
-- holders shall not be used in advertising or otherwise to promote the --
-- sale, use or other dealings in this Software without prior written --
-- authorization. --
------------------------------------------------------------------------------
-- Author: Eugene V. Melaragno <aldomel@ix.netcom.com> 2000
-- Version Control
-- $Revision$
-- Binding Version 01.00
------------------------------------------------------------------------------
-- Windows and scrolling tester.
-- Demonstrate windows
with Ada.Strings.Fixed;
with Ada.Strings;
with ncurses2.util; use ncurses2.util;
with ncurses2.genericPuts;
with Terminal_Interface.Curses; use Terminal_Interface.Curses;
with Terminal_Interface.Curses.Mouse; use Terminal_Interface.Curses.Mouse;
with Terminal_Interface.Curses.PutWin; use Terminal_Interface.Curses.PutWin;
with Ada.Streams.Stream_IO; use Ada.Streams.Stream_IO;
with Ada.Streams; use Ada.Streams;
procedure ncurses2.acs_and_scroll is
Macro_Quit : constant Key_Code := Character'Pos ('Q') mod 16#20#;
Macro_Escape : constant Key_Code := Character'Pos ('[') mod 16#20#;
Quit : constant Key_Code := CTRL ('Q');
Escape : constant Key_Code := CTRL ('[');
Botlines : constant Line_Position := 4;
type pair is record
y : Line_Position;
x : Column_Position;
end record;
type Frame;
type FrameA is access Frame;
f : File_Type;
dumpfile : constant String := "screendump";
procedure Outerbox (ul, lr : pair; onoff : Boolean);
function HaveKeyPad (w : Window) return Boolean;
function HaveScroll (w : Window) return Boolean;
procedure newwin_legend (curpw : Window);
procedure transient (curpw : Window; msg : String);
procedure newwin_report (win : Window := Standard_Window);
procedure selectcell (uli : Line_Position;
ulj : Column_Position;
lri : Line_Position;
lrj : Column_Position;
p : out pair;
b : out Boolean);
function getwindow return Window;
procedure newwin_move (win : Window;
dy : Line_Position;
dx : Column_Position);
function delete_framed (fp : FrameA; showit : Boolean) return FrameA;
use Ada.Streams.Stream_IO;
-- A linked list
-- I wish there was a standard library linked list. Oh well.
type Frame is record
next, last : FrameA;
do_scroll : Boolean;
do_keypad : Boolean;
wind : Window;
end record;
current : FrameA;
c : Key_Code;
procedure Outerbox (ul, lr : pair; onoff : Boolean) is
begin
if onoff then
-- Note the fix of an obscure bug
-- try making a 1x1 box then enlarging it, the is a blank
-- upper left corner!
Add (Line => ul.y - 1, Column => ul.x - 1,
Ch => ACS_Map (ACS_Upper_Left_Corner));
Add (Line => ul.y - 1, Column => lr.x + 1,
Ch => ACS_Map (ACS_Upper_Right_Corner));
Add (Line => lr.y + 1, Column => lr.x + 1,
Ch => ACS_Map (ACS_Lower_Right_Corner));
Add (Line => lr.y + 1, Column => ul.x - 1,
Ch => ACS_Map (ACS_Lower_Left_Corner));
Move_Cursor (Line => ul.y - 1, Column => ul.x);
Horizontal_Line (Line_Symbol => ACS_Map (ACS_Horizontal_Line),
Line_Size => Integer (lr.x - ul.x) + 1);
Move_Cursor (Line => ul.y, Column => ul.x - 1);
Vertical_Line (Line_Symbol => ACS_Map (ACS_Vertical_Line),
Line_Size => Integer (lr.y - ul.y) + 1);
Move_Cursor (Line => lr.y + 1, Column => ul.x);
Horizontal_Line (Line_Symbol => ACS_Map (ACS_Horizontal_Line),
Line_Size => Integer (lr.x - ul.x) + 1);
Move_Cursor (Line => ul.y, Column => lr.x + 1);
Vertical_Line (Line_Symbol => ACS_Map (ACS_Vertical_Line),
Line_Size => Integer (lr.y - ul.y) + 1);
else
Add (Line => ul.y - 1, Column => ul.x - 1, Ch => ' ');
Add (Line => ul.y - 1, Column => lr.x + 1, Ch => ' ');
Add (Line => lr.y + 1, Column => lr.x + 1, Ch => ' ');
Add (Line => lr.y + 1, Column => ul.x - 1, Ch => ' ');
Move_Cursor (Line => ul.y - 1, Column => ul.x);
Horizontal_Line (Line_Symbol => Blank2,
Line_Size => Integer (lr.x - ul.x) + 1);
Move_Cursor (Line => ul.y, Column => ul.x - 1);
Vertical_Line (Line_Symbol => Blank2,
Line_Size => Integer (lr.y - ul.y) + 1);
Move_Cursor (Line => lr.y + 1, Column => ul.x);
Horizontal_Line (Line_Symbol => Blank2,
Line_Size => Integer (lr.x - ul.x) + 1);
Move_Cursor (Line => ul.y, Column => lr.x + 1);
Vertical_Line (Line_Symbol => Blank2,
Line_Size => Integer (lr.y - ul.y) + 1);
end if;
end Outerbox;
function HaveKeyPad (w : Window) return Boolean is
begin
return Get_KeyPad_Mode (w);
exception
when Curses_Exception => return False;
end HaveKeyPad;
function HaveScroll (w : Window) return Boolean is
begin
return Scrolling_Allowed (w);
exception
when Curses_Exception => return False;
end HaveScroll;
procedure newwin_legend (curpw : Window) is
package p is new genericPuts (200);
use p;
use p.BS;
type string_a is access String;
type rrr is record
msg : string_a;
code : Integer range 0 .. 3;
end record;
legend : constant array (Positive range <>) of rrr :=
(
(
new String'("^C = create window"), 0
),
(
new String'("^N = next window"), 0
),
(
new String'("^P = previous window"), 0
),
(
new String'("^F = scroll forward"), 0
),
(
new String'("^B = scroll backward"), 0
),
(
new String'("^K = keypad(%s)"), 1
),
(
new String'("^S = scrollok(%s)"), 2
),
(
new String'("^W = save window to file"), 0
),
(
new String'("^R = restore window"), 0
),
(
new String'("^X = resize"), 0
),
(
new String'("^Q%s = exit"), 3
)
);
buf : Bounded_String;
do_keypad : Boolean := HaveKeyPad (curpw);
do_scroll : Boolean := HaveScroll (curpw);
pos : Natural;
mypair : pair;
use Ada.Strings.Fixed;
begin
Move_Cursor (Line => Lines - 4, Column => 0);
for n in legend'Range loop
pos := Ada.Strings.Fixed.Index (Source => legend (n).msg.all,
Pattern => "%s");
-- buf := (others => ' ');
buf := To_Bounded_String (legend (n).msg.all);
case legend (n).code is
when 0 => null;
when 1 =>
if do_keypad then
Replace_Slice (buf, pos, pos + 1, "yes");
else
Replace_Slice (buf, pos, pos + 1, "no");
end if;
when 2 =>
if do_scroll then
Replace_Slice (buf, pos, pos + 1, "yes");
else
Replace_Slice (buf, pos, pos + 1, "no");
end if;
when 3 =>
if do_keypad then
Replace_Slice (buf, pos, pos + 1, "/ESC");
else
Replace_Slice (buf, pos, pos + 1, "");
end if;
end case;
Get_Cursor_Position (Line => mypair.y, Column => mypair.x);
if Columns < mypair.x + 3 + Column_Position (Length (buf)) then
Add (Ch => newl);
elsif n /= 1 then -- n /= legen'First
Add (Str => ", ");
end if;
myAdd (Str => buf);
end loop;
Clear_To_End_Of_Line;
end newwin_legend;
procedure transient (curpw : Window; msg : String) is
begin
newwin_legend (curpw);
if msg /= "" then
Add (Line => Lines - 1, Column => 0, Str => msg);
Refresh;
Nap_Milli_Seconds (1000);
end if;
Move_Cursor (Line => Lines - 1, Column => 0);
if HaveKeyPad (curpw) then
Add (Str => "Non-arrow");
else
Add (Str => "All other");
end if;
Add (str => " characters are echoed, window should ");
if not HaveScroll (curpw) then
Add (Str => "not ");
end if;
Add (str => "scroll");
Clear_To_End_Of_Line;
end transient;
procedure newwin_report (win : Window := Standard_Window) is
y : Line_Position;
x : Column_Position;
use Int_IO;
tmp2a : String (1 .. 2);
tmp2b : String (1 .. 2);
begin
if win /= Standard_Window then
transient (win, "");
end if;
Get_Cursor_Position (win, y, x);
Move_Cursor (Line => Lines - 1, Column => Columns - 17);
Put (tmp2a, Integer (y));
Put (tmp2b, Integer (x));
Add (Str => "Y = " & tmp2a & " X = " & tmp2b);
if win /= Standard_Window then
Refresh;
else
Move_Cursor (win, y, x);
end if;
end newwin_report;
procedure selectcell (uli : Line_Position;
ulj : Column_Position;
lri : Line_Position;
lrj : Column_Position;
p : out pair;
b : out Boolean) is
c : Key_Code;
res : pair;
i : Line_Position := 0;
j : Column_Position := 0;
si : Line_Position := lri - uli + 1;
sj : Column_Position := lrj - ulj + 1;
begin
res.y := uli;
res.x := ulj;
loop
Move_Cursor (Line => uli + i, Column => ulj + j);
newwin_report;
c := Getchar;
case c is
when
Macro_Quit |
Macro_Escape =>
-- on the same line macro calls interfere due to the # comment
-- this is needed because keypad off affects all windows.
-- try removing the ESCAPE and see what happens.
b := False;
return;
when KEY_UP =>
i := i + si - 1;
-- same as i := i - 1 because of Modulus arithetic,
-- on Line_Position, which is a Natural
-- the C version uses this form too, interestingly.
when KEY_DOWN =>
i := i + 1;
when KEY_LEFT =>
j := j + sj - 1;
when KEY_RIGHT =>
j := j + 1;
when Key_Mouse =>
declare
event : Mouse_Event;
y : Line_Position;
x : Column_Position;
Button : Mouse_Button;
State : Button_State;
begin
event := Get_Mouse;
Get_Event (Event => event,
Y => y,
X => x,
Button => Button,
State => State);
if y > uli and x > ulj then
i := y - uli;
j := x - ulj;
-- same as when others =>
res.y := uli + i;
res.x := ulj + j;
p := res;
b := True;
return;
else
Beep;
end if;
end;
when others =>
res.y := uli + i;
res.x := ulj + j;
p := res;
b := True;
return;
end case;
i := i mod si;
j := j mod sj;
end loop;
end selectcell;
function getwindow return Window is
rwindow : Window;
ul, lr : pair;
result : Boolean;
begin
Move_Cursor (Line => 0, Column => 0);
Clear_To_End_Of_Line;
Add (Str => "Use arrows to move cursor, anything else to mark corner 1");
Refresh;
selectcell (2, 1, Lines - Botlines - 2, Columns - 2, ul, result);
if not result then
return Null_Window;
end if;
Add (Line => ul.y - 1, Column => ul.x - 1,
Ch => ACS_Map (ACS_Upper_Left_Corner));
Move_Cursor (Line => 0, Column => 0);
Clear_To_End_Of_Line;
Add (Str => "Use arrows to move cursor, anything else to mark corner 2");
Refresh;
selectcell (ul.y, ul.x, Lines - Botlines - 2, Columns - 2, lr, result);
if not result then
return Null_Window;
end if;
rwindow := Sub_Window (Number_Of_Lines => lr.y - ul.y + 1,
Number_Of_Columns => lr.x - ul.x + 1,
First_Line_Position => ul.y,
First_Column_Position => ul.x);
Outerbox (ul, lr, True);
Refresh;
Refresh (rwindow);
Move_Cursor (Line => 0, Column => 0);
Clear_To_End_Of_Line;
return rwindow;
end getwindow;
procedure newwin_move (win : Window;
dy : Line_Position;
dx : Column_Position) is
cur_y, max_y : Line_Position;
cur_x, max_x : Column_Position;
begin
Get_Cursor_Position (win, cur_y, cur_x);
Get_Size (win, max_y, max_x);
cur_x := Column_Position'Min (Column_Position'Max (cur_x + dx, 0),
max_x - 1);
cur_y := Line_Position'Min (Line_Position'Max (cur_y + dy, 0),
max_y - 1);
Move_Cursor (win, Line => cur_y, Column => cur_x);
end newwin_move;
function delete_framed (fp : FrameA; showit : Boolean) return FrameA is
np : FrameA;
begin
fp.last.next := fp.next;
fp.next.last := fp.last;
if showit then
Erase (fp.wind);
Refresh (fp.wind);
end if;
Delete (fp.wind);
if fp = fp.next then
np := null;
else
np := fp.next;
end if;
-- TODO free(fp);
return np;
end delete_framed;
Mask : Event_Mask := No_Events;
Mask2 : Event_Mask;
usescr : Window;
begin
if Has_Mouse then
Register_Reportable_Event (
Button => Left,
State => Clicked,
Mask => Mask);
Mask2 := Start_Mouse (Mask);
end if;
c := CTRL ('C');
Set_Raw_Mode (SwitchOn => True);
loop
transient (Standard_Window, "");
case c is
when Character'Pos ('c') mod 16#20# => -- Ctrl('c')
declare
neww : FrameA := new Frame'(null, null, False, False,
Null_Window);
begin
neww.wind := getwindow;
if neww.wind = Null_Window then
exit;
-- was goto breakout; ha ha ha
else
if current = null then
neww.next := neww;
neww.last := neww;
else
neww.next := current.next;
neww.last := current;
neww.last.next := neww;
neww.next.last := neww;
end if;
current := neww;
Set_KeyPad_Mode (current.wind, True);
current.do_keypad := HaveKeyPad (current.wind);
current.do_scroll := HaveScroll (current.wind);
end if;
end;
when Character'Pos ('N') mod 16#20# => -- Ctrl('N')
if current /= null then
current := current.next;
end if;
when Character'Pos ('P') mod 16#20# => -- Ctrl('P')
if current /= null then
current := current.last;
end if;
when Character'Pos ('F') mod 16#20# => -- Ctrl('F')
if current /= null and HaveScroll (current.wind) then
Scroll (current.wind, 1);
end if;
when Character'Pos ('B') mod 16#20# => -- Ctrl('B')
if current /= null and HaveScroll (current.wind) then
-- The C version of Scroll may return ERR which is ignored
-- we need to avoid the exception
-- with the 'and HaveScroll(current.wind)'
Scroll (current.wind, -1);
end if;
when Character'Pos ('K') mod 16#20# => -- Ctrl('K')
if current /= null then
current.do_keypad := not current.do_keypad;
Set_KeyPad_Mode (current.wind, current.do_keypad);
end if;
when Character'Pos ('S') mod 16#20# => -- Ctrl('S')
if current /= null then
current.do_scroll := not current.do_scroll;
Allow_Scrolling (current.wind, current.do_scroll);
end if;
when Character'Pos ('W') mod 16#20# => -- Ctrl('W')
if current /= current.next then
Create (f, Name => dumpfile); -- TODO error checking
if not Is_Open (f) then
raise Curses_Exception;
end if;
Put_Window (current.wind, f);
Close (f);
current := delete_framed (current, True);
end if;
when Character'Pos ('R') mod 16#20# => -- Ctrl('R')
declare
neww : FrameA := new Frame'(null, null, False, False,
Null_Window);
begin
Open (f, Mode => In_File, Name => dumpfile);
neww := new Frame'(null, null, False, False, Null_Window);
neww.next := current.next;
neww.last := current;
neww.last.next := neww;
neww.next.last := neww;
neww.wind := Get_Window (f);
Close (f);
Refresh (neww.wind);
end;
when Character'Pos ('X') mod 16#20# => -- Ctrl('X')
if current /= null then
declare
tmp, ul, lr : pair;
mx : Column_Position;
my : Line_Position;
tmpbool : Boolean;
begin
Move_Cursor (Line => 0, Column => 0);
Clear_To_End_Of_Line;
Add (Str => "Use arrows to move cursor, anything else " &
"to mark new corner");
Refresh;
Get_Window_Position (current.wind, ul.y, ul.x);
selectcell (ul.y, ul.x, Lines - Botlines - 2, Columns - 2,
tmp, tmpbool);
if not tmpbool then
-- the C version had a goto. I refuse gotos.
Beep;
else
Get_Size (current.wind, lr.y, lr.x);
lr.y := lr.y + ul.y - 1;
lr.x := lr.x + ul.x - 1;
Outerbox (ul, lr, False);
Refresh_Without_Update;
Get_Size (current.wind, my, mx);
if my > tmp.y - ul.y then
Get_Cursor_Position (current.wind, lr.y, lr.x);
Move_Cursor (current.wind, tmp.y - ul.y + 1, 0);
Clear_To_End_Of_Screen (current.wind);
Move_Cursor (current.wind, lr.y, lr.x);
end if;
if mx > tmp.x - ul.x then
for i in 0 .. my - 1 loop
Move_Cursor (current.wind, i, tmp.x - ul.x + 1);
Clear_To_End_Of_Line (current.wind);
end loop;
end if;
Refresh_Without_Update (current.wind);
lr := tmp;
-- The C version passes invalid args to resize
-- which returns an ERR. For Ada we avoid the exception.
if lr.y /= ul.y and lr.x /= ul.x then
Resize (current.wind, lr.y - ul.y + 0,
lr.x - ul.x + 0);
end if;
Get_Window_Position (current.wind, ul.y, ul.x);
Get_Size (current.wind, lr.y, lr.x);
lr.y := lr.y + ul.y - 1;
lr.x := lr.x + ul.x - 1;
Outerbox (ul, lr, True);
Refresh_Without_Update;
Refresh_Without_Update (current.wind);
Move_Cursor (Line => 0, Column => 0);
Clear_To_End_Of_Line;
Update_Screen;
end if;
end;
end if;
when Key_F10 =>
declare tmp : pair; tmpbool : Boolean;
begin
-- undocumented --- use this to test area clears
selectcell (0, 0, Lines - 1, Columns - 1, tmp, tmpbool);
Clear_To_End_Of_Screen;
Refresh;
end;
when Key_Cursor_Up =>
newwin_move (current.wind, -1, 0);
when Key_Cursor_Down =>
newwin_move (current.wind, 1, 0);
when Key_Cursor_Left =>
newwin_move (current.wind, 0, -1);
when Key_Cursor_Right =>
newwin_move (current.wind, 0, 1);
when Key_Backspace | Key_Delete_Char =>
declare
y : Line_Position;
x : Column_Position;
tmp : Line_Position;
begin
Get_Cursor_Position (current.wind, y, x);
-- x := x - 1;
-- I got tricked by the -1 = Max_Natural - 1 result
-- y := y - 1;
if not (x = 0 and y = 0) then
if x = 0 then
y := y - 1;
Get_Size (current.wind, tmp, x);
end if;
x := x - 1;
Delete_Character (current.wind, y, x);
end if;
end;
when others =>
-- TODO c = '\r' ?
if current /= null then
declare
begin
Add (current.wind, Ch => Code_To_Char (c));
exception
when Curses_Exception => null;
-- this happens if we are at the
-- lower right of a window and add a character.
end;
else
Beep;
end if;
end case;
newwin_report (current.wind);
if current /= null then
usescr := current.wind;
else
usescr := Standard_Window;
end if;
Refresh (usescr);
c := Getchar (usescr);
exit when c = Quit or (c = Escape and HaveKeyPad (usescr));
-- TODO when does c = ERR happen?
end loop;
-- TODO while current /= null loop
-- current := delete_framed(current, False);
-- end loop;
Allow_Scrolling (Mode => True);
End_Mouse;
Set_Raw_Mode (SwitchOn => True);
Erase;
End_Windows;
end ncurses2.acs_and_scroll;
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