; ***************************************************************************
; copyright   : (C) 2026 by Martin Preuss
; email       : martin@libchipcard.de
;
; ***************************************************************************
; * This file is part of the project "AqHome".                              *
; * Please see toplevel file COPYING of that project for license details.   *
; ***************************************************************************

#ifndef AQH_AVR_GUI2_WIDGET_ASM
#define AQH_AVR_GUI2_WIDGET_ASM


; ***************************************************************************
; defines

; Widget in flash

.equ WIDGET_OFFS_BEGIN                 =  OBJECT_SIZE
.equ WIDGET_OFFS_X_LO                  =  WIDGET_OFFS_BEGIN+0
.equ WIDGET_OFFS_X_HI                  =  WIDGET_OFFS_BEGIN+1
.equ WIDGET_OFFS_Y_LO                  =  WIDGET_OFFS_BEGIN+2
.equ WIDGET_OFFS_Y_HI                  =  WIDGET_OFFS_BEGIN+3
.equ WIDGET_OFFS_WIDTH_LO              =  WIDGET_OFFS_BEGIN+4
.equ WIDGET_OFFS_WIDTH_HI              =  WIDGET_OFFS_BEGIN+5
.equ WIDGET_OFFS_HEIGHT_LO             =  WIDGET_OFFS_BEGIN+6
.equ WIDGET_OFFS_HEIGHT_HI             =  WIDGET_OFFS_BEGIN+7
.equ WIDGET_OFFS_STYLE_LO              =  WIDGET_OFFS_BEGIN+8  ; byte address (for LPM!)
.equ WIDGET_OFFS_STYLE_HI              =  WIDGET_OFFS_BEGIN+9
.equ WIDGET_SIZE                       =  WIDGET_OFFS_BEGIN+10

; widget style object
.equ WIDGET_STYLE_OFFS_FRONTCOL_NORM       =  0
.equ WIDGET_STYLE_OFFS_BACKCOL_NORM        =  1
.equ WIDGET_STYLE_OFFS_BORDERCOL_NORM      =  2
.equ WIDGET_STYLE_OFFS_SHADOWCOL_NORM      =  3
.equ WIDGET_STYLE_OFFS_FRONTCOL_ACTIVATED  =  4
.equ WIDGET_STYLE_OFFS_BACKCOL_ACTIVATED   =  5
.equ WIDGET_STYLE_OFFS_BORDERCOL_ACTIVATED =  6
.equ WIDGET_STYLE_OFFS_SHADOWCOL_ACTIVATED =  7
.equ WIDGET_STYLE_OFFS_OUTERBORDERSIZE     =  8
.equ WIDGET_STYLE_OFFS_INNERBORDERSIZE     =  9
.equ WIDGET_STYLE_OFFS_FONT_LO             = 10
.equ WIDGET_STYLE_OFFS_FONT_HI             = 11
.equ WIDGET_STYLE_OFFS_CHARWIDTH           = 12
.equ WIDGET_STYLE_OFFS_CHARHEIGHT          = 13
.equ WIDGET_STYLE_SIZE                     = 14

; widget opts_lo (bits 7 and 6 used by OBJECT_OPTSLO)
.equ WIDGET_OPTSLO_INPUT_BIT           =  5 ; TOUCH, KEY
.equ WIDGET_OPTSLO_BORDER_BIT          =  4
.equ WIDGET_OPTSLO_XALIGN1_BIT         =  3 ; (2 bit: left, right, center, filled)
.equ WIDGET_OPTSLO_XALIGN0_BIT         =  2
.equ WIDGET_OPTSLO_YALIGN1_BIT         =  1 ; (2 bit: top, bottom, center, filled)
.equ WIDGET_OPTSLO_YALIGN0_BIT         =  0

; values for WIDGET_OPTSLO_XALIGN (2 bits)
.equ WIDGET_OPTSLO_XALIGN_LEFT         =  0
.equ WIDGET_OPTSLO_XALIGN_RIGHT        =  1
.equ WIDGET_OPTSLO_XALIGN_CENTER       =  2
.equ WIDGET_OPTSLO_XALIGN_FILLED       =  3

; values for WIDGET_OPTSLO_YALIGN (2 bits)
.equ WIDGET_OPTSLO_YALIGN_TOP          =  0
.equ WIDGET_OPTSLO_YALIGN_BOTTOM       =  1
.equ WIDGET_OPTSLO_YALIGN_CENTER       =  2
.equ WIDGET_OPTSLO_YALIGN_FILLED       =  3

; widget flags
.equ WIDGET_FLAGS_VISIBLE_BIT          =  7
.equ WIDGET_FLAGS_TOUCH_BIT            =  6
.equ WIDGET_FLAGS_DIRTY_BIT            =  5
.equ WIDGET_FLAGS_LAYOUT_BIT           =  4
.equ WIDGET_FLAGS_ACTIVATED_BIT        =  3
.equ WIDGET_FLAGS_SELECTED_BIT         =  2

; SDRAM data for signal WIDGET_SIGNAL_TOUCH
.equ WIDGET_TOUCH_OFFS_X_LO            =  0
.equ WIDGET_TOUCH_OFFS_X_HI            =  1
.equ WIDGET_TOUCH_OFFS_Y_LO            =  2
.equ WIDGET_TOUCH_OFFS_Y_HI            =  3
.equ WIDGET_TOUCH_OFFS_STATE           =  4
.equ WIDGET_TOUCH_SIZE                 =  5

; signals
.equ WIDGET_SIGNAL_SHOW                =  OBJECT_SIGNAL_NEXTFREE+0
.equ WIDGET_SIGNAL_HIDE                =  OBJECT_SIGNAL_NEXTFREE+1
.equ WIDGET_SIGNAL_LAYOUT              =  OBJECT_SIGNAL_NEXTFREE+2
.equ WIDGET_SIGNAL_DRAW                =  OBJECT_SIGNAL_NEXTFREE+3
.equ WIDGET_SIGNAL_TOUCH               =  OBJECT_SIGNAL_NEXTFREE+4
.equ WIDGET_SIGNAL_CLICKED             =  OBJECT_SIGNAL_NEXTFREE+5
.equ WIDGET_SIGNAL_NEXTFREE            =  OBJECT_SIGNAL_NEXTFREE+6



; ***************************************************************************
; code

.cseg


; ---------------------------------------------------------------------------
; @routine Widget_Init @global
;
; @param Y address of object in SDRAM
; @param r16 value for OBJECT_OFFS_OPTS_LO
; @param r17 value for OBJECT_OFFS_OPTS_HI
; @clobbers r16, r17, X

Widget_Init:
  ; call base class
  bigcall OBJ_Init                          ; (r16, r17, X)

  ; clear widget-specific data
  mov xl, yl
  mov xh, yh
  adiw xh:xl, WIDGET_OFFS_BEGIN
  clr r16
  ldi r17, (WIDGET_SIZE-WIDGET_OFFS_BEGIN)
  bigcall Utils_FillSram                    ; (r17, X)
  
  ; set default signal map
  ldi r16, LOW(Widget_DefaultSignalmap*2)
  std Y+OBJECT_OFFS_SIGNALMAP_LO, r16
  ldi r16, HIGH(Widget_DefaultSignalmap*2)
  std Y+OBJECT_OFFS_SIGNALMAP_HI, r16
  
  ; set default style
  ldi r16, LOW(Widget_DefaultStyle*2)
  std Y+WIDGET_OFFS_STYLE_LO, r16
  ldi r16, HIGH(Widget_DefaultStyle*2)
  std Y+WIDGET_OFFS_STYLE_HI, r16
  
  ; initial size: 1x1 px
  ldi r16, 1
  clr r17
  std Y+WIDGET_OFFS_WIDTH_LO, r16
  std Y+WIDGET_OFFS_WIDTH_HI, r17
  std Y+WIDGET_OFFS_HEIGHT_LO, r16
  std Y+WIDGET_OFFS_HEIGHT_HI, r17
  
  ret
; @end



; ---------------------------------------------------------------------------
; @routine Widget_Fini @global
;
; @param Y address of object in SDRAM
; @clobbers none

Widget_Fini:
  ret
; @end



; ---------------------------------------------------------------------------
; @routine Widget_Resize @global
;
; @param Y address of widget
; @param r9:r8   W
; @param r11:r10 H
; @clobbers r16

Widget_Resize:
  std Y+WIDGET_OFFS_WIDTH_LO, r8
  std Y+WIDGET_OFFS_WIDTH_HI, r9
  std Y+WIDGET_OFFS_HEIGHT_LO, r10
  std Y+WIDGET_OFFS_HEIGHT_HI, r11
  ldd r16, Y+OBJECT_OFFS_FLAGS
  ori r16, (1<<WIDGET_FLAGS_LAYOUT_BIT) | (1<<WIDGET_FLAGS_DIRTY_BIT)
  std Y+OBJECT_OFFS_FLAGS, r16
  ret
; @end



; ---------------------------------------------------------------------------
; @routine Widget_Move @global
;
; @param Y address of widget
; @param r5:r4   X0
; @param r7:r6   Y0
; @clobbers r16

Widget_Move:
  std Y+WIDGET_OFFS_X_LO, r4
  std Y+WIDGET_OFFS_X_HI, r5
  std Y+WIDGET_OFFS_Y_LO, r6
  std Y+WIDGET_OFFS_Y_HI, r7
  ldd r16, Y+OBJECT_OFFS_FLAGS
  ori r16, (1<<WIDGET_FLAGS_LAYOUT_BIT) | (1<<WIDGET_FLAGS_DIRTY_BIT)
  std Y+OBJECT_OFFS_FLAGS, r16
  ret
; @end



; ---------------------------------------------------------------------------
; @routine Widget_OnDraw @global
;
; @param Y address of widget
; @param xl param1
; @param xh param2
; @return CFLAG set if signal handled
; @clobbers any, !Y

Widget_OnDraw:
  ldd r17, Y+OBJECT_OFFS_FLAGS

  ; check whether widget is visible
  sbrs r17, WIDGET_FLAGS_VISIBLE_BIT
    rjmp Widget_OnDraw_ret

  ; check whether widget is dirty
  sbrs r17, WIDGET_FLAGS_DIRTY_BIT
    rjmp Widget_OnDraw_ret

  ; clear dirty bit
  cbr r17, (1<<WIDGET_FLAGS_DIRTY_BIT)
  std Y+OBJECT_OFFS_FLAGS, r17
  
  ; clear widget background
  rcall Widget_Clear                    ; (any, !Y)

Widget_OnDraw_ret:
  sec
  ret
; @end



; ---------------------------------------------------------------------------
; @routine Widget_OnDrawNop @global
;
; @param Y address of widget
; @param xl param1
; @param xh param2
; @return CFLAG set if signal handled
; @clobbers any, !Y

Widget_OnDrawNop:
  ldd r17, Y+OBJECT_OFFS_FLAGS
  ; only clear dirty bit
  cbr r17, (1<<WIDGET_FLAGS_DIRTY_BIT)
  std Y+OBJECT_OFFS_FLAGS, r17
  sec
  ret
; @end



; ---------------------------------------------------------------------------
; @routine Widget_Clear @global
;
; @param Y address of widget
; @clobbers any, !Y

Widget_Clear:
  rcall widgetLoadDimsForFullWidget   ; (none)
  rcall Widget_MakeAbsPos             ; (r16, r17, r18, r19)
  rcall Widget_SelectColors           ; (R16)
  mov r2, r0                          ; use background
  mov r3, r1
  bigcall Display_FillRect
  ret
; @end



; ---------------------------------------------------------------------------
; @routine Widget_DrawBorder @global
;
; @param Y address of widget
; @param r3:r2 color
; @clobbers any, !Z

Widget_DrawBorder:
  rcall widgetLoadDimsForFullWidget   ; (none)
  rcall Widget_MakeAbsPos             ; (R16, R17)
  rcall Widget_SelectBorderColors     ; (R16)
  bigcall Display_DrawRect
Widget_DrawBorder_ret:
  ret
; @end



; ---------------------------------------------------------------------------
; @routine Widget_FillRect @global
;
; @param Y address of widget
; @param r3:r2   color
; @param r5:r4   X0
; @param r7:r6   Y0
; @param r9:r8   X1/W
; @param r11:r10 Y1/H
; @clobbers any, !Z

Widget_FillRect:
  rcall Widget_MakeAbsPos             ; (r16, r17, r18, r19)
  mov r2, r0                          ; use background
  mov r3, r1
  bigcall Display_FillRect
  ret
; @end



; ---------------------------------------------------------------------------
; @routine Widget_DrawImage @global
;
; @param  Y       address of widget
; @param  R1:R0   background color
; @param  R5:R4   X relative to widget
; @param  R7:R6   Y relative to widget
; @param  Z       byte address pointer to image in FLASH (for LPM!)
; @clobbers all, !Y

Widget_DrawImage:
  push yl
    push yh
      rcall widgetCalcAbsPosAndBorders    ; (R16, R17)
      bigcall ili9341ImageDraw
    pop yh
  pop yl  
  ret
; @end



; ---------------------------------------------------------------------------
; @routine Widget_DrawTextFlash @global
;
; @param  Y       address of widget
; @param  R5:R4   X relative to widget
; @param  R7:R6   Y relative to widget
; @return Z       pointer to next char to write if CFLAG clear
; @clobbers any, !Y

Widget_DrawTextFlash:
  rcall Widget_SelectColors         ; (R16)
  rjmp Widget_DrawColoredTextFlash
; @end



; ---------------------------------------------------------------------------
; @routine Widget_DrawTextRam @global
;
; @param  Y       address of widget
; @param  R5:R4   X relative to widget
; @param  R7:R6   Y relative to widget
; @param  X       pointer to text in SDRAM
; @return CFLAG   set if completely written
; @return X       pointer to next char to write if CFLAG clear
; @clobbers any, !Y

Widget_DrawTextRam:
  rcall Widget_SelectColors         ; (R16)
  rjmp Widget_DrawColoredTextRam
; @end



; ---------------------------------------------------------------------------
; @routine Widget_DrawColoredTextFlash @global
;
; @param  Y       address of widget
; @param  R1:R0   background color
; @param  R3:R2   foreground color
; @param  R5:R4   X relative to widget
; @param  R7:R6   Y relative to widget
; @param  Z       byte address pointer to text in flash (for LPM!)
; @return CFLAG   set if completely written
; @return Z       pointer to next char to write if CFLAG clear
; @clobbers any, !Y

Widget_DrawColoredTextFlash:
  rcall widgetCalcAbsPosAndBorders    ; (R16, R17)

Widget_DrawColoredTextFlash_loop:
    lpm r16, Z
    tst r16
    sec
    breq Widget_DrawColoredTextFlash_loopEnd
    push zl
      push zh
        rcall widgetDrawChar                  ; (any, !Y, !R6, !R7, !R8, !R9, !R10, !R11)
      pop zh
    pop zl
    brcc Widget_DrawColoredTextFlash_loopEnd
    adiw zh:zl, 1
  rjmp Widget_DrawColoredTextFlash_loop
Widget_DrawColoredTextFlash_loopEnd:
  ret
; @end



; ---------------------------------------------------------------------------
; @routine Widget_DrawColoredTextRam @global
;
; @param  Y       address of widget
; @param  R1:R0   background color
; @param  R3:R2   foreground color
; @param  R5:R4   X relative to widget
; @param  R7:R6   Y relative to widget
; @param  X       pointer to text in SDRAM
; @return CFLAG   set if completely written
; @clobbers any, !Y

Widget_DrawColoredTextRam:
  rcall widgetCalcAbsPosAndBorders           ; (R16, R17)

Widget_DrawColoredTextRam_loop:
    ld r16, X
    tst r16
    sec
    breq Widget_DrawColoredTextRam_loopEnd
    push xl
      push xh
        rcall widgetDrawChar                 ; (any, !Y, !R6, !R7, !R8, !R9, !R10, !R11)
      pop xh
    pop xl
    brcc Widget_DrawColoredTextRam_loopEnd
    adiw xh:xl, 1
  rjmp Widget_DrawColoredTextRam_loop
Widget_DrawColoredTextRam_loopEnd:
  ret
; @end



; ---------------------------------------------------------------------------
; @routine Widget_MakeAbsPos @global
;
; @param Y address of widget
; @param r5:r4   X
; @param r7:r6   Y
; @clobbers r16, r17, r18, r19

Widget_MakeAbsPos:
  push yl
    push yh
Widget_MakeAbsPos_loop:
        ; adjust X
        ldd r16, Y+WIDGET_OFFS_X_LO
        ldd r17, Y+WIDGET_OFFS_X_HI
        add r4, r16
        adc r5, r17
        ; adjust Y
        ldd r16, Y+WIDGET_OFFS_Y_LO
        ldd r17, Y+WIDGET_OFFS_Y_HI
        add r6, r16
        adc r7, r17
        ; continue with parent
        rcall OBJ_GetParent             ; r19:r18=parent widget (none)
        brcc Widget_MakeAbsPos_loopEnd
        mov yl, r18
        mov yh, r19
      rjmp Widget_MakeAbsPos_loop
Widget_MakeAbsPos_loopEnd:
    pop yh
  pop yl  
  ret
; @end



; ---------------------------------------------------------------------------
; @routine Widget_SelectColors @global
;
; @param  Y     address of widget
; @return r1:r0 background color
; @return r3:r2 foreground color
; @clobbers R16

Widget_SelectColors:
  push zl
    push zh
      ldd zl, Y+WIDGET_OFFS_STYLE_LO
      ldd zh, Y+WIDGET_OFFS_STYLE_HI
      ldd r16, Y+OBJECT_OFFS_FLAGS
      sbrc r16, WIDGET_FLAGS_ACTIVATED_BIT
        rjmp Widget_SelectColors_activated
      adiw zh:zl, WIDGET_STYLE_OFFS_FRONTCOL_NORM
      rjmp Widget_SelectColors_readColors
Widget_SelectColors_activated:
      adiw zh:zl, WIDGET_STYLE_OFFS_FRONTCOL_ACTIVATED
Widget_SelectColors_readColors:
      lpm r2, Z+                 ; read foreground color
      lpm r3, Z+
      lpm r0, Z+                 ; read background color
      lpm r1, Z
    pop zh
  pop zl
  ret
; @end



; ---------------------------------------------------------------------------
; @routine Widget_SelectBorderColors @global
;
; @param  Y     address of widget
; @return r1:r0 border color
; @return r3:r2 shadow color
; @clobbers R16

Widget_SelectBorderColors:
  push zl
    push zh
      ldd zl, Y+WIDGET_OFFS_STYLE_LO
      ldd zh, Y+WIDGET_OFFS_STYLE_HI
      ldd r16, Y+OBJECT_OFFS_FLAGS
      sbrc r16, WIDGET_FLAGS_ACTIVATED_BIT
        rjmp Widget_SelectBorderColors_activated
      adiw zh:zl, WIDGET_STYLE_OFFS_BORDERCOL_NORM
      rjmp Widget_SelectBorderColors_readColors
Widget_SelectBorderColors_activated:
      adiw zh:zl, WIDGET_STYLE_OFFS_BORDERCOL_ACTIVATED
Widget_SelectBorderColors_readColors:
      lpm r2, Z+                 ; read border color
      lpm r3, Z+
      lpm r0, Z+                 ; read shadow color
      lpm r1, Z
    pop zh
  pop zl
  ret
; @end



; ---------------------------------------------------------------------------
; @routine widgetDrawChar
;
; @param Y address of widget
; @param R16 char to write
; @param  R5:R4   absolute X on screen (in display coords)
; @param  R7:R6   absolute Y on screen (in display coords)
; @param  R9:R8   first X pos right of windows (in display coords)
; @return CFLAG set if char printed, cleared otherwise
; @return R5:R4   X pos behind char
; @clobbers any, !Y, !R6, !R7, !R8, !R9, !R10, !R11

widgetDrawChar:
  push yl
    push yh
      push r16
        ; get font and charWidth
        ldd zl, Y+WIDGET_OFFS_STYLE_LO
        ldd zh, Y+WIDGET_OFFS_STYLE_HI
        adiw zh:zl, WIDGET_STYLE_OFFS_CHARWIDTH
        lpm r18, Z
        sbiw zh:zl, WIDGET_STYLE_OFFS_CHARWIDTH
        adiw zh:zl, WIDGET_STYLE_OFFS_FONT_LO
        lpm r19, Z+
        lpm zh, Z
        mov zl, r19
        
        ; check whether char fits into widget
        clr r17
        add r16, r4                        ; char width+X
        adc r17, r5
        sub r16, r8                        ; check against window width
        sbc r17, r9
      pop r16
      brcc widgetDrawChar_done             ; not fit, jmp
    
      ; draw char
      push r8
        push r9
          push r10
            push r11
              push r18                     ; save char width
                bigcall Display_DrawChar
              pop r18
            pop r11
          pop r10
        pop r9
      pop r8
      ; increment X
      clr r16
      add r4, r18
      adc r5, r16
      sec
widgetDrawChar_done:
    pop yh
  pop yl  
  ret
; @end





; ---------------------------------------------------------------------------
; @routine widgetLoadDimsForFullWidget
;
; @param Y address of widget
; @return r5:r4   X (0)
; @return r7:r6   Y (0)
; @return r9:r8   widget width
; @return r11:R10 widget height
; @clobbers none

widgetLoadDimsForFullWidget:
  clr r4
  clr r5
  clr r6
  clr r7
  ldd r8, Y+WIDGET_OFFS_WIDTH_LO
  ldd r9, Y+WIDGET_OFFS_WIDTH_HI
  ldd r10, Y+WIDGET_OFFS_HEIGHT_LO
  ldd r11, Y+WIDGET_OFFS_HEIGHT_HI
  ret
; @end



; ---------------------------------------------------------------------------
; @routine widgetCalcAbsPosAndBorders
;
; @param  Y       address of widget
; @param  R5:R4   X relative to widget
; @param  R7:R6   Y relative to widget
; @return R9:R8   first X pos right of widget
; @return R5:R4   X relative to screen
; @return R7:R6   Y relative to screen
; @return R9:R8   first X pos right of widget (abs)
; @return R11:R10 first Y pos below widget (abs)
; @clobbers r16, r17

widgetCalcAbsPosAndBorders:
  rcall Widget_MakeAbsPos          ; (R16, R17)
  ldd r8, Y+WIDGET_OFFS_WIDTH_LO
  ldd r9, Y+WIDGET_OFFS_WIDTH_HI
  add r8, r4                       ; convert width to first pos right of widget
  adc r9, r5
  ldd r10, Y+WIDGET_OFFS_HEIGHT_LO
  ldd r11, Y+WIDGET_OFFS_HEIGHT_HI
  add r10, r6
  adc r11, r7                      ; convert height to first pos below widget
  ret
; @end






; ***************************************************************************
; data in FLASH

Widget_DefaultSignalmap:
  .db 0, WIDGET_SIGNAL_DRAW,    LOW(Widget_OnDraw), HIGH(Widget_OnDraw)
  .db 0, OBJECT_SIGNAL_DESTROY, LOW(OBJ_OnDestroy), HIGH(OBJ_OnDestroy)
  .db 0, 0, 0, 0  ; end of table



Widget_DefaultStyle:
  .dw DISPLAY_COLOR_BLACK      ; frontCol_norm
  .dw DISPLAY_COLOR_LIGHTGREY  ; backCol_norm
  .dw DISPLAY_COLOR_BLACK      ; borderCol_norm
  .dw DISPLAY_COLOR_WHITE      ; shadowCol_norm
  
  .dw DISPLAY_COLOR_WHITE      ; frontCol_activated
  .dw DISPLAY_COLOR_NAVY       ; backCol_activated
  .dw DISPLAY_COLOR_BLACK      ; borderCol_activated
  .dw DISPLAY_COLOR_WHITE      ; shadowCol_activated
  
  .db 0, 1                     ; outerBorderSize, innerBorderSize
  .dw ili9341Font12x16_1*2     ; font
  .db 12, 16                   ; charWidth, charHeight


#endif