(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004-2015 Andrey Korotaev <unC0Rr@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; version 2 of the License

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 *)

{$INCLUDE "options.inc"}

unit uInputHandler;

interface

uses SDLh, uTypes;

procedure initModule;

procedure freeModule;

function  KeyNameToCode(name: shortstring): LongInt; inline;

function  KeyNameToCode(name: shortstring; Modifier: shortstring): LongInt;

function  KeyBindToCode(bind: shortstring): LongInt;

function  KeyBindToName(bind: shortstring): ansistring;

//procedure MaskModifier(var code: LongInt; modifier: LongWord);

procedure MaskModifier(Modifier: shortstring; var code: LongInt);

procedure ProcessMouse(event: TSDL_MouseButtonEvent; ButtonDown: boolean);

//procedure ProcessMouseWheel(x, y: LongInt);

procedure ProcessMouseWheel(y: LongInt);

procedure ProcessKey(event: TSDL_KeyboardEvent); inline;

procedure ProcessKey(code: LongInt; KeyDown: boolean);

procedure ResetKbd;

procedure ResetMouseWheel;

procedure FreezeEnterKey;

procedure InitKbdKeyTable;

procedure SetBinds(var binds: TBinds);

procedure SetDefaultBinds;

procedure chDefaultBind(var id: shortstring);

procedure loadBinds(cmd, s: shortstring);

procedure addBind(var binds: TBinds; var id: shortstring);

procedure ControllerInit;

procedure ControllerAxisEvent(joy, axis: Byte; value: Integer);

procedure ControllerHatEvent(joy, hat, value: Byte);

procedure ControllerButtonEvent(joy, button: Byte; pressed: Boolean);

implementation

uses uConsole, uCommands, uVariables, uConsts, uUtils, uDebug, uPhysFSLayer;

const

    LSHIFT = $0200;

    RSHIFT = $0400;

    LALT   = $0800;

    RALT   = $1000;

    LCTRL  = $2000;

    RCTRL  = $4000;

var tkbd: array[0..cKbdMaxIndex] of boolean;

    KeyNames: array [0..cKeyMaxIndex] of string[15];

    CurrentBinds: TBinds;

    ControllerNumControllers: Integer;

    ControllerEnabled: Integer;

    ControllerNumAxes: array[0..5] of Integer;

    //ControllerNumBalls: array[0..5] of Integer;

    ControllerNumHats: array[0..5] of Integer;

    ControllerNumButtons: array[0..5] of Integer;

    //ControllerAxes: array[0..5] of array[0..19] of Integer;

    //ControllerBalls: array[0..5] of array[0..19] of array[0..1] of Integer;

    //ControllerHats: array[0..5] of array[0..19] of Byte;

    //ControllerButtons: array[0..5] of array[0..19] of Byte;

function  KeyNameToCode(name: shortstring): LongInt; inline;

begin

    KeyNameToCode:= KeyNameToCode(name, '');

end;

function KeyNameToCode(name: shortstring; Modifier: shortstring): LongInt;

var code: LongInt;

begin

    name:= LowerCase(name);

    code:= 0;

    while (code <= cKeyMaxIndex) and (KeyNames[code] <> name) do inc(code);

    MaskModifier(Modifier, code);

    KeyNameToCode:= code;

end;

// Takes a control name (e.g. 'quit') and returns the corresponding key code,

// if it has been bound.

// Returns -1 if the control has not been bound.

function KeyBindToCode(bind: shortstring): LongInt;

var code, index: LongInt;

begin

    index:= 0;

    while (index <= High(CurrentBinds.binds)) and (CurrentBinds.binds[index] <> bind) do inc(index);

    if index > High(CurrentBinds.binds) then

        // Return error

        KeyBindToCode:= -1

    else begin

        code:= 0;

        while (code <= High(CurrentBinds.indices)) and (CurrentBinds.indices[code] <> index) do inc(code);

        checkFails(code <= High(CurrentBinds.indices), 'binds registry inconsistency', True);

        KeyBindToCode:= code;

    end;

end;

// Takes a control name (e.g. 'quit') and returns the corresponding

// human-readable key name from SDL.

// FIXME: Does not work 100% for all keys yet, but at least it no

//        longer hardcodes any key name.

// TODO: Localize

function KeyBindToName(bind: shortstring): ansistring;

var code: LongInt;

    name: ansistring;

begin

    code:= KeyBindToCode(bind);

    if code = -1 then

        KeyBindToName:= trmsg[sidUnknownKey]

    else

        begin

        name:= SDL_GetKeyName(SDL_GetKeyFromScancode(code));

        if (name = 'Escape') then

            // Let's shorten the name “Escape” for the quit menu

            KeyBindToName:= 'Esc'

        else if (name <> '') then

            KeyBindToName:= name

        else

            begin

            WriteLnToConsole('Error: KeyBindToName('+bind+') failed to find SDL key name!');

            KeyBindToName:= trmsg[sidUnknownKey];

            end;

        end;

end;

(*

procedure MaskModifier(var code: LongInt; Modifier: LongWord);

begin

    if(Modifier and KMOD_LSHIFT) <> 0 then code:= code or LSHIFT;

    if(Modifier and KMOD_RSHIFT) <> 0 then code:= code or LSHIFT;

    if(Modifier and KMOD_LALT) <> 0 then code:= code or LALT;

    if(Modifier and KMOD_RALT) <> 0 then code:= code or LALT;

    if(Modifier and KMOD_LCTRL) <> 0 then code:= code or LCTRL;

    if(Modifier and KMOD_RCTRL) <> 0 then code:= code or LCTRL;

end;

*)

procedure MaskModifier(Modifier: shortstring; var code: LongInt);

var mod_ : shortstring = '';

    ModifierCount, i: LongInt;

begin

if Modifier = '' then exit;

ModifierCount:= 0;

for i:= 1 to Length(Modifier) do

    if(Modifier[i] = ':') then inc(ModifierCount);

SplitByChar(Modifier, mod_, ':');//remove the first mod: part

Modifier:= mod_;

for i:= 0 to ModifierCount do

    begin

    mod_:= '';

    SplitByChar(Modifier, mod_, ':');

    if (Modifier = 'lshift')                    then code:= code or LSHIFT;

    if (Modifier = 'rshift')                    then code:= code or RSHIFT;

    if (Modifier = 'lalt')                      then code:= code or LALT;

    if (Modifier = 'ralt')                      then code:= code or RALT;

    if (Modifier = 'lctrl') or (mod_ = 'lmeta') then code:= code or LCTRL;

    if (Modifier = 'rctrl') or (mod_ = 'rmeta') then code:= code or RCTRL;

    Modifier:= mod_;

    end;

end;

procedure ProcessKey(code: LongInt; KeyDown: boolean);

var

    Trusted: boolean;

    s      : string;

begin

if not(tkbd[code] xor KeyDown) then exit;

tkbd[code]:= KeyDown;

Trusted:= (CurrentTeam <> nil)

          and (not CurrentTeam^.ExtDriven)

          and (CurrentHedgehog^.BotLevel = 0);

// REVIEW OR FIXME

// ctrl/cmd + q to close engine and frontend - this seems like a bad idea, since we let people set arbitrary binds, and don't warn them of this.

// There's no confirmation at all

// ctrl/cmd + q to close engine and frontend

if(KeyDown and (code = SDLK_q)) then

    begin

{$IFDEF DARWIN}

    if tkbd[KeyNameToCode('left_meta')] or tkbd[KeyNameToCode('right_meta')] then

{$ELSE}

    if tkbd[KeyNameToCode('left_ctrl')] or tkbd[KeyNameToCode('right_ctrl')] then

{$ENDIF}

        ParseCommand('halt', true);

    end;

// ctrl/cmd + w to close engine

if(KeyDown and (code = SDLK_w)) then

    begin

{$IFDEF DARWIN}

    // on OS X it this is expected behaviour

    if tkbd[KeyNameToCode('left_meta')] or tkbd[KeyNameToCode('right_meta')] then

{$ELSE}

    // on other systems use this shortcut only if the keys are not bound to any command

    if tkbd[KeyNameToCode('left_ctrl')] or tkbd[KeyNameToCode('right_ctrl')] then

        if ((CurrentBinds.indices[KeyNameToCode('left_ctrl')] = 0) or

            (CurrentBinds.indices[KeyNameToCode('right_ctrl')] = 0)) and

            (CurrentBinds.indices[SDLK_w] = 0) then

{$ENDIF}

        ParseCommand('forcequit', true);

    end;

if CurrentBinds.indices[code] > 0 then

    begin

    if (code < cKeyMaxIndex - 2) // means not mouse buttons

        and KeyDown

        and (not ((CurrentBinds.binds[CurrentBinds.indices[code]] = 'put') 

                  or (CurrentBinds.binds[CurrentBinds.indices[code]] = 'ammomenu') 

                  or (CurrentBinds.binds[CurrentBinds.indices[code]] = '+cur_u') 

                  or (CurrentBinds.binds[CurrentBinds.indices[code]] = '+cur_d') 

                  or (CurrentBinds.binds[CurrentBinds.indices[code]] = '+cur_l') 

                  or (CurrentBinds.binds[CurrentBinds.indices[code]] = '+cur_r')))

        and (CurrentTeam <> nil) 

        and (not CurrentTeam^.ExtDriven) 

        then bShowAmmoMenu:= false;

    if KeyDown then

        begin

        Trusted:= Trusted and (not isPaused); //releasing keys during pause should be allowed on the other hand

        if CurrentBinds.binds[CurrentBinds.indices[code]] = 'switch' then

            LocalMessage:= LocalMessage or gmSwitch

        else if CurrentBinds.binds[CurrentBinds.indices[code]] = '+precise' then

            LocalMessage:= LocalMessage or gmPrecise;

        ParseCommand(CurrentBinds.binds[CurrentBinds.indices[code]], Trusted);

        if (CurrentTeam <> nil) and (not CurrentTeam^.ExtDriven) and (ReadyTimeLeft > 1) then

            ParseCommand('gencmd R', true)

        end

    else if (CurrentBinds.binds[CurrentBinds.indices[code]][1] = '+') then

        begin

        if CurrentBinds.binds[CurrentBinds.indices[code]] = '+precise' then

            LocalMessage:= LocalMessage and (not gmPrecise);

        s:= CurrentBinds.binds[CurrentBinds.indices[code]];

        s[1]:= '-';

        ParseCommand(s, Trusted);

        if (CurrentTeam <> nil) and (not CurrentTeam^.ExtDriven) and (ReadyTimeLeft > 1) then

            ParseCommand('gencmd R', true)

        end

    else

        begin

        if CurrentBinds.binds[CurrentBinds.indices[code]] = 'switch' then

            LocalMessage:= LocalMessage and (not gmSwitch)

        end

    end

end;

procedure ProcessKey(event: TSDL_KeyboardEvent); inline;

var code: LongInt;

begin

    // TODO

    code:= LongInt(event.keysym.scancode);

    //writelntoconsole('[KEY] '+inttostr(code)+ ' -> ''' +KeyNames[code] + ''', type = '+inttostr(event.type_));

    ProcessKey(code, event.type_ = SDL_KEYDOWN);

end;

procedure ProcessMouse(event: TSDL_MouseButtonEvent; ButtonDown: boolean);

begin

    //writelntoconsole('[MOUSE] '+inttostr(event.button));

    case event.button of

        SDL_BUTTON_LEFT:

            ProcessKey(KeyNameToCode('mousel'), ButtonDown);

        SDL_BUTTON_MIDDLE:

            ProcessKey(KeyNameToCode('mousem'), ButtonDown);

        SDL_BUTTON_RIGHT:

            ProcessKey(KeyNameToCode('mouser'), ButtonDown);

        end;

end;

var mwheelupCode, mwheeldownCode: Integer;

//procedure ProcessMouseWheel(x, y: LongInt);

procedure ProcessMouseWheel(y: LongInt);

begin

    // we don't use 

    //writelntoconsole('[MOUSEWHEEL] '+inttostr(x)+', '+inttostr(y));

    if y > 0 then

        begin

        // reset other direction

        if tkbd[mwheeldownCode] then

            ProcessKey(mwheeldownCode, false);

        // trigger "button down" event

        if (not tkbd[mwheelupCode]) then

            ProcessKey(mwheelupCode, true);

        end

    else if y < 0 then

        begin

        // reset other direction

        if tkbd[mwheelupCode] then

            ProcessKey(mwheelupCode, false);

        // trigger "button down" event

        if (not tkbd[mwheeldownCode]) then

            ProcessKey(mwheeldownCode, true);

        end;

end;

procedure ResetMouseWheel();

begin

    if tkbd[mwheelupCode] then

        ProcessKey(mwheelupCode, false);

    if tkbd[mwheeldownCode] then

        ProcessKey(mwheeldownCode, false);

end;

procedure ResetKbd;

var t: LongInt;

begin

for t:= 0 to cKbdMaxIndex do

    if tkbd[t] then

        ProcessKey(t, False);

end;

procedure RegisterBind(var binds: TBinds; key, value: shortstring);

var code: LongInt;

begin

    checkFails(binds.lastIndex < 255, 'too many binds', true);

    code:= KeyNameToCode(key);

    checkFails(code >= 0, 'unknown key', true);

    inc(binds.lastIndex);

    binds.indices[code]:= binds.lastIndex;

    binds.binds[binds.lastIndex]:= value

end;

procedure InitDefaultBinds;

var i: Longword;

begin

    RegisterBind(DefaultBinds, 'escape', 'quit');

    RegisterBind(DefaultBinds, _S'`', 'history');

    RegisterBind(DefaultBinds, 'delete', 'rotmask');

    RegisterBind(DefaultBinds, 'home', 'rottags');

    //numpad

    //DefaultBinds[265]:= '+volup';

    //DefaultBinds[256]:= '+voldown';

    RegisterBind(DefaultBinds, _S'0', '+volup');

    RegisterBind(DefaultBinds, _S'9', '+voldown');

    RegisterBind(DefaultBinds, _S'8', 'mute');

    RegisterBind(DefaultBinds, _S'c', 'capture');

    RegisterBind(DefaultBinds, _S'r', 'record');

    RegisterBind(DefaultBinds, _S'h', 'findhh');

    RegisterBind(DefaultBinds, _S'p', 'pause');

    RegisterBind(DefaultBinds, _S's', '+speedup');

    RegisterBind(DefaultBinds, _S't', 'chat');

    RegisterBind(DefaultBinds, _S'y', 'confirm');

    RegisterBind(DefaultBinds, 'mousem', 'zoomreset');

    RegisterBind(DefaultBinds, 'wheelup', 'zoomin');

    RegisterBind(DefaultBinds, 'wheeldown', 'zoomout');

    RegisterBind(DefaultBinds, 'f12', 'fullscr');

    RegisterBind(DefaultBinds, 'mousel', '/put');

    RegisterBind(DefaultBinds, 'mouser', 'ammomenu');

    RegisterBind(DefaultBinds, 'backspace', 'hjump');

    RegisterBind(DefaultBinds, 'tab', 'switch');

    RegisterBind(DefaultBinds, 'return', 'ljump');

    RegisterBind(DefaultBinds, 'space', '+attack');

    RegisterBind(DefaultBinds, 'up', '+up');

    RegisterBind(DefaultBinds, 'down', '+down');

    RegisterBind(DefaultBinds, 'left', '+left');

    RegisterBind(DefaultBinds, 'right', '+right');

    RegisterBind(DefaultBinds, 'left_shift', '+precise');

    RegisterBind(DefaultBinds, 'j0a0u', '+left');

    RegisterBind(DefaultBinds, 'j0a0d', '+right');

    RegisterBind(DefaultBinds, 'j0a1u', '+up');

    RegisterBind(DefaultBinds, 'j0a1d', '+down');

    for i:= 1 to 10 do RegisterBind(DefaultBinds, 'f'+IntToStr(i), 'slot '+char(48+i));

    for i:= 1 to 5  do RegisterBind(DefaultBinds, IntToStr(i), 'timer '+IntToStr(i));

    loadBinds('dbind', cPathz[ptConfig] + '/settings.ini');

end;

procedure InitKbdKeyTable;

var i, j, k, t: LongInt;

    s: string[15];

begin

    KeyNames[cKeyMaxIndex    ]:= 'mousel';

    KeyNames[cKeyMaxIndex - 1]:= 'mousem';

    KeyNames[cKeyMaxIndex - 2]:= 'mouser';

    mwheelupCode:= cKeyMaxIndex - 3;

    KeyNames[mwheelupCode]:= 'wheelup';

    mwheeldownCode:= cKeyMaxIndex - 4;

    KeyNames[mwheeldownCode]:= 'wheeldown';

    for i:= 0 to cKeyMaxIndex - 5 do

        begin

        s:= shortstring(SDL_GetScancodeName(TSDL_Scancode(i)));

        for t:= 1 to Length(s) do

            if s[t] = ' ' then

                s[t]:= '_';

        KeyNames[i]:= LowerCase(s)

        end;

    // get the size of keyboard array

    SDL_GetKeyboardState(@k);

    // Controller(s)

    for j:= 0 to Pred(ControllerNumControllers) do

        begin

        for i:= 0 to Pred(ControllerNumAxes[j]) do

            begin

            KeyNames[k + 0]:= 'j' + IntToStr(j) + 'a' + IntToStr(i) + 'u';

            KeyNames[k + 1]:= 'j' + IntToStr(j) + 'a' + IntToStr(i) + 'd';

            inc(k, 2);

            end;

        for i:= 0 to Pred(ControllerNumHats[j]) do

            begin

            KeyNames[k + 0]:= 'j' + IntToStr(j) + 'h' + IntToStr(i) + 'u';

            KeyNames[k + 1]:= 'j' + IntToStr(j) + 'h' + IntToStr(i) + 'r';

            KeyNames[k + 2]:= 'j' + IntToStr(j) + 'h' + IntToStr(i) + 'd';

            KeyNames[k + 3]:= 'j' + IntToStr(j) + 'h' + IntToStr(i) + 'l';

            inc(k, 4);

            end;

        for i:= 0 to Pred(ControllerNumButtons[j]) do

            begin

            KeyNames[k]:= 'j' + IntToStr(j) + 'b' + IntToStr(i);

            inc(k, 1);

            end;

        end;

        InitDefaultBinds

end;

{$IFNDEF MOBILE}

procedure SetBinds(var binds: TBinds);

var

    t: LongInt;

begin

    for t:= 0 to cKbdMaxIndex do

        if (CurrentBinds.binds[CurrentBinds.indices[t]] <> binds.binds[binds.indices[t]]) and tkbd[t] then

            ProcessKey(t, False);

    CurrentBinds:= binds;

end;

{$ELSE}

procedure SetBinds(var binds: TBinds);

begin

    binds:= binds; // avoid hint

    CurrentBinds:= DefaultBinds;

end;

{$ENDIF}

procedure SetDefaultBinds;

begin

    CurrentBinds:= DefaultBinds;

end;

procedure FreezeEnterKey;

begin

    tkbd[3]:= True;

    tkbd[13]:= True;