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  1. ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  2. ;;                                                              ;;
  3. ;; Copyright (C) KolibriOS team 2010. All rights reserved.      ;;
  4. ;; Distributed under terms of the GNU General Public License    ;;
  5. ;;                                                              ;;
  6. ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  7.  
  8. $Revision: 2011 $
  9.  
  10. include 'mousepointer.inc'
  11.  
  12. ;==============================================================================
  13. ;///// public functions ///////////////////////////////////////////////////////
  14. ;==============================================================================
  15.  
  16. mouse.LEFT_BUTTON_FLAG   = 0001b
  17. mouse.RIGHT_BUTTON_FLAG  = 0010b
  18. mouse.MIDDLE_BUTTON_FLAG = 0100b
  19.  
  20. mouse.BUTTONS_MASK = \
  21.   mouse.LEFT_BUTTON_FLAG or \
  22.   mouse.RIGHT_BUTTON_FLAG or \
  23.   mouse.MIDDLE_BUTTON_FLAG
  24.  
  25. mouse.WINDOW_RESIZE_N_FLAG = 000001b
  26. mouse.WINDOW_RESIZE_W_FLAG = 000010b
  27. mouse.WINDOW_RESIZE_S_FLAG = 000100b
  28. mouse.WINDOW_RESIZE_E_FLAG = 001000b
  29. mouse.WINDOW_MOVE_FLAG     = 010000b
  30.  
  31. mouse.WINDOW_RESIZE_SW_FLAG = \
  32.   mouse.WINDOW_RESIZE_S_FLAG or \
  33.   mouse.WINDOW_RESIZE_W_FLAG
  34. mouse.WINDOW_RESIZE_SE_FLAG = \
  35.   mouse.WINDOW_RESIZE_S_FLAG or \
  36.   mouse.WINDOW_RESIZE_E_FLAG
  37.  
  38. align 4
  39. ;------------------------------------------------------------------------------
  40. mouse_check_events: ;//////////////////////////////////////////////////////////
  41. ;------------------------------------------------------------------------------
  42. ;? Check if mouse buttons state or cursor position has changed and call
  43. ;? appropriate handlers
  44. ;------------------------------------------------------------------------------
  45.         push    eax ebx
  46.  
  47.         mov     al, [BTN_DOWN]
  48.         mov     bl, [mouse.state.buttons]
  49.         and     al, mouse.BUTTONS_MASK
  50.         mov     cl, al
  51.         xchg    cl, [mouse.state.buttons]
  52.         xor     bl, al
  53.         push    eax ebx
  54.  
  55.         ; did any mouse button changed its state?
  56.         or      bl, bl
  57.         jz      .check_position
  58.  
  59.         ; yes it did, is that the first button of all pressed down?
  60.         or      cl, cl
  61.         jnz     .check_buttons_released
  62.  
  63.         ; yes it is, activate window user is pointing at, if needed
  64.         call    mouse._.activate_sys_window_under_cursor
  65.  
  66.         ; NOTE: this code wouldn't be necessary if we knew window did
  67.         ;       already redraw itself after call above
  68.         or      eax, eax
  69.         jz      @f
  70.  
  71.         and     [mouse.state.buttons], 0
  72.         jmp     .exit
  73.  
  74.         ; is there any system button under cursor?
  75.     @@: call    mouse._.find_sys_button_under_cursor
  76.         or      eax, eax
  77.         jz      .check_buttons_released
  78.  
  79.         ; yes there is, activate it and exit
  80.         mov     [mouse.active_sys_button.pbid], eax
  81.         mov     [mouse.active_sys_button.coord], ebx
  82.         mov     cl, [mouse.state.buttons]
  83.         mov     [mouse.active_sys_button.buttons], cl
  84.         call    sys_button_activate_handler
  85.         jmp     .exit
  86.  
  87.   .check_buttons_released:
  88.         cmp     [mouse.state.buttons], 0
  89.         jnz     .buttons_changed
  90.  
  91.         ; did we press some button earlier?
  92.         cmp     [mouse.active_sys_button.pbid], 0
  93.         je      .buttons_changed
  94.  
  95.         ; yes we did, deactivate it
  96.         xor     eax, eax
  97.         xchg    eax, [mouse.active_sys_button.pbid]
  98.         mov     ebx, [mouse.active_sys_button.coord]
  99.         mov     cl, [mouse.active_sys_button.buttons]
  100.         push    eax ebx
  101.         call    sys_button_deactivate_handler
  102.         pop     edx ecx
  103.  
  104.         ; is the button under cursor the one we deactivated?
  105.         call    mouse._.find_sys_button_under_cursor
  106.         cmp     eax, ecx
  107.         jne     .exit
  108.         cmp     ebx, edx
  109.         jne     .exit
  110.  
  111.         ; yes it is, perform associated action
  112.         mov     cl, [mouse.active_sys_button.buttons]
  113.         call    sys_button_perform_handler
  114.         jmp     .exit
  115.  
  116.   .buttons_changed:
  117.         test    byte[esp], mouse.LEFT_BUTTON_FLAG
  118.         jz      @f
  119.         mov     eax, [esp + 4]
  120.         call    .call_left_button_handler
  121.  
  122.     @@: test    byte[esp], mouse.RIGHT_BUTTON_FLAG
  123.         jz      @f
  124.         mov     eax, [esp + 4]
  125.         call    .call_right_button_handler
  126.  
  127.     @@: test    byte[esp], mouse.MIDDLE_BUTTON_FLAG
  128.         jz      .check_position
  129.         mov     eax, [esp + 4]
  130.         call    .call_middle_button_handler
  131.  
  132.   .check_position:
  133.         movzx   eax, word[MOUSE_X]
  134.         movzx   ebx, word[MOUSE_Y]
  135.         cmp     eax, [mouse.state.pos.x]
  136.         jne     .position_changed
  137.         cmp     ebx, [mouse.state.pos.y]
  138.         je      .exit
  139.  
  140.   .position_changed:
  141.         xchg    eax, [mouse.state.pos.x]
  142.         xchg    ebx, [mouse.state.pos.y]
  143.  
  144.         call    mouse._.move_handler
  145.  
  146.   .exit:
  147.         add     esp, 8
  148.         pop     ebx eax
  149.         ret
  150.  
  151.   .call_left_button_handler:
  152.         test    eax, mouse.LEFT_BUTTON_FLAG
  153.         jnz     mouse._.left_button_press_handler
  154.         jmp     mouse._.left_button_release_handler
  155.  
  156.   .call_right_button_handler:
  157.         test    eax, mouse.RIGHT_BUTTON_FLAG
  158.         jnz     mouse._.right_button_press_handler
  159.         jmp     mouse._.right_button_release_handler
  160.  
  161.   .call_middle_button_handler:
  162.         test    eax, mouse.MIDDLE_BUTTON_FLAG
  163.         jnz     mouse._.middle_button_press_handler
  164.         jmp     mouse._.middle_button_release_handler
  165.  
  166. ;==============================================================================
  167. ;///// private functions //////////////////////////////////////////////////////
  168. ;==============================================================================
  169.  
  170. uglobal
  171.   mouse.state:
  172.     .pos     POINT
  173.     .buttons db ?
  174.  
  175.   ; NOTE: since there's no unique and lifetime-constant button identifiers,
  176.   ;       we're using two dwords to identify each of them:
  177.   ;       * pbid - process slot (high 8 bits) and button id (low 24 bits) pack
  178.   ;       * coord - left (high 16 bits) and top (low 16 bits) coordinates pack
  179.   align 4
  180.   mouse.active_sys_button:
  181.     .pbid    dd ?
  182.     .coord   dd ?
  183.     .buttons db ?
  184.  
  185.   align 4
  186.   mouse.active_sys_window:
  187.     .pslot      dd ?
  188.     .old_box    BOX
  189.     .new_box    BOX
  190.     .delta      POINT
  191.     .last_ticks dd ?
  192.     .action     db ?
  193. endg
  194.  
  195. align 4
  196. ;------------------------------------------------------------------------------
  197. mouse._.left_button_press_handler: ;///////////////////////////////////////////
  198. ;------------------------------------------------------------------------------
  199. ;? Called when left mouse button has been pressed down
  200. ;------------------------------------------------------------------------------
  201.         test    [mouse.state.buttons], not mouse.LEFT_BUTTON_FLAG
  202.         jnz     .exit
  203.  
  204.         call    mouse._.find_sys_window_under_cursor
  205.         call    mouse._.check_sys_window_actions
  206.         mov     [mouse.active_sys_window.action], al
  207.         or      eax, eax
  208.         jz      .exit
  209.  
  210.         xchg    eax, edx
  211.         test    dl, mouse.WINDOW_MOVE_FLAG
  212.         jz      @f
  213.  
  214.         mov     eax, [timer_ticks]
  215.         mov     ebx, eax
  216.         xchg    ebx, [mouse.active_sys_window.last_ticks]
  217.         sub     eax, ebx
  218.         cmp     eax, 50
  219.         jg      @f
  220.  
  221.         mov     [mouse.active_sys_window.last_ticks], 0
  222.         call    sys_window_maximize_handler
  223.         jmp     .exit
  224.  
  225.     @@: test    [edi + WDATA.fl_wstate], WSTATE_MAXIMIZED
  226.         jnz     .exit
  227.         mov     [mouse.active_sys_window.pslot], esi
  228.         lea     eax, [edi + WDATA.box]
  229.         mov     ebx, mouse.active_sys_window.old_box
  230.         mov     ecx, BOX.sizeof
  231.         call    memmove
  232.         mov     ebx, mouse.active_sys_window.new_box
  233.         call    memmove
  234.         test    edx, mouse.WINDOW_MOVE_FLAG
  235.         jz      @f
  236.  
  237.         call    .calculate_n_delta
  238.         call    .calculate_w_delta
  239.         jmp     .call_window_handler
  240.  
  241.     @@: test    dl, mouse.WINDOW_RESIZE_W_FLAG
  242.         jz      @f
  243.         call    .calculate_w_delta
  244.  
  245.     @@: test    dl, mouse.WINDOW_RESIZE_S_FLAG
  246.         jz      @f
  247.         call    .calculate_s_delta
  248.  
  249.     @@: test    dl, mouse.WINDOW_RESIZE_E_FLAG
  250.         jz      .call_window_handler
  251.         call    .calculate_e_delta
  252.  
  253.   .call_window_handler:
  254.         mov     eax, mouse.active_sys_window.old_box
  255.         call    sys_window_start_moving_handler
  256.  
  257.   .exit:
  258.         ret
  259.  
  260.   .calculate_n_delta:
  261.         mov     eax, [mouse.state.pos.y]
  262.         sub     eax, [mouse.active_sys_window.old_box.top]
  263.         mov     [mouse.active_sys_window.delta.y], eax
  264.         ret
  265.  
  266.   .calculate_w_delta:
  267.         mov     eax, [mouse.state.pos.x]
  268.         sub     eax, [mouse.active_sys_window.old_box.left]
  269.         mov     [mouse.active_sys_window.delta.x], eax
  270.         ret
  271.  
  272.   .calculate_s_delta:
  273.         mov     eax, [mouse.active_sys_window.old_box.top]
  274.         add     eax, [mouse.active_sys_window.old_box.height]
  275.         sub     eax, [mouse.state.pos.y]
  276.         mov     [mouse.active_sys_window.delta.y], eax
  277.         ret
  278.  
  279.   .calculate_e_delta:
  280.         mov     eax, [mouse.active_sys_window.old_box.left]
  281.         add     eax, [mouse.active_sys_window.old_box.width]
  282.         sub     eax, [mouse.state.pos.x]
  283.         mov     [mouse.active_sys_window.delta.x], eax
  284.         ret
  285.  
  286. align 4
  287. ;------------------------------------------------------------------------------
  288. mouse._.left_button_release_handler: ;/////////////////////////////////////////
  289. ;------------------------------------------------------------------------------
  290. ;? Called when left mouse button has been released
  291. ;------------------------------------------------------------------------------
  292.         xor     esi, esi
  293.         xchg    esi, [mouse.active_sys_window.pslot]
  294.         or      esi, esi
  295.         jz      .exit
  296.  
  297.         mov     eax, esi
  298.         shl     eax, 5
  299.         add     eax, window_data + WDATA.box
  300.         mov     ebx, mouse.active_sys_window.old_box
  301.         mov     ecx, BOX.sizeof
  302.         call    memmove
  303.  
  304.         mov     eax, mouse.active_sys_window.old_box
  305.         mov     ebx, mouse.active_sys_window.new_box
  306.         call    sys_window_end_moving_handler
  307.  
  308.   .exit:
  309.         and     [mouse.active_sys_window.action], 0
  310.         ret
  311.  
  312. align 4
  313. ;------------------------------------------------------------------------------
  314. mouse._.right_button_press_handler: ;//////////////////////////////////////////
  315. ;------------------------------------------------------------------------------
  316. ;? Called when right mouse button has been pressed down
  317. ;------------------------------------------------------------------------------
  318.         test    [mouse.state.buttons], not mouse.RIGHT_BUTTON_FLAG
  319.         jnz     .exit
  320.  
  321.         call    mouse._.find_sys_window_under_cursor
  322.         call    mouse._.check_sys_window_actions
  323.         test    al, mouse.WINDOW_MOVE_FLAG
  324.         jz      .exit
  325.  
  326.         call    sys_window_rollup_handler
  327.  
  328.   .exit:
  329.         ret
  330.  
  331. align 4
  332. ;------------------------------------------------------------------------------
  333. mouse._.right_button_release_handler: ;////////////////////////////////////////
  334. ;------------------------------------------------------------------------------
  335. ;? Called when right mouse button has been released
  336. ;------------------------------------------------------------------------------
  337.         ret
  338.  
  339. align 4
  340. ;------------------------------------------------------------------------------
  341. mouse._.middle_button_press_handler: ;/////////////////////////////////////////
  342. ;------------------------------------------------------------------------------
  343. ;? Called when middle mouse button has been pressed down
  344. ;------------------------------------------------------------------------------
  345.         ret
  346.  
  347. align 4
  348. ;------------------------------------------------------------------------------
  349. mouse._.middle_button_release_handler: ;///////////////////////////////////////
  350. ;------------------------------------------------------------------------------
  351. ;? Called when middle mouse button has been released
  352. ;------------------------------------------------------------------------------
  353.         ret
  354.  
  355. align 4
  356. ;------------------------------------------------------------------------------
  357. mouse._.move_handler: ;////////////////////////////////////////////////////////
  358. ;------------------------------------------------------------------------------
  359. ;? Called when cursor has been moved
  360. ;------------------------------------------------------------------------------
  361. ;> eax = old x coord
  362. ;> ebx = old y coord
  363. ;------------------------------------------------------------------------------
  364.         cmp     [mouse.active_sys_button.pbid], 0
  365.         jnz     .exit
  366.  
  367.         mov     esi, [mouse.active_sys_window.pslot]
  368.         or      esi, esi
  369.         jz      .exit
  370.  
  371.         mov     eax, mouse.active_sys_window.new_box
  372.         mov     ebx, mouse.active_sys_window.old_box
  373.         mov     ecx, BOX.sizeof
  374.         call    memmove
  375.  
  376.         mov     dl, [mouse.active_sys_window.action]
  377.         test    dl, mouse.WINDOW_MOVE_FLAG
  378.         jz      .check_resize_w
  379.  
  380.         mov     eax, [mouse.state.pos.x]
  381.         sub     eax, [mouse.active_sys_window.delta.x]
  382.         mov     [mouse.active_sys_window.new_box.left], eax
  383.         mov     eax, [mouse.state.pos.y]
  384.         sub     eax, [mouse.active_sys_window.delta.y]
  385.         mov     [mouse.active_sys_window.new_box.top], eax
  386.  
  387.         mov     eax, [mouse.active_sys_window.new_box.left]
  388.         or      eax, eax
  389.         jge     @f
  390.         xor     eax, eax
  391.         mov     [mouse.active_sys_window.new_box.left], eax
  392.     @@: add     eax, [mouse.active_sys_window.new_box.width]
  393.         cmp     eax, [Screen_Max_X]
  394.         jl      @f
  395.         sub     eax, [Screen_Max_X]
  396.         sub     [mouse.active_sys_window.new_box.left], eax
  397.     @@: mov     eax, [mouse.active_sys_window.new_box.top]
  398.         or      eax, eax
  399.         jge     @f
  400.         xor     eax, eax
  401.         mov     [mouse.active_sys_window.new_box.top], eax
  402.     @@: add     eax, [mouse.active_sys_window.new_box.height]
  403.         cmp     eax, [Screen_Max_Y]
  404.         jle     .call_window_handler
  405.         sub     eax, [Screen_Max_Y]
  406.         sub     [mouse.active_sys_window.new_box.top], eax
  407.         jmp     .call_window_handler
  408.  
  409.   .check_resize_w:
  410.         test    dl, mouse.WINDOW_RESIZE_W_FLAG
  411.         jz      .check_resize_s
  412.  
  413.         mov     eax, [mouse.state.pos.x]
  414.         sub     eax, [mouse.active_sys_window.delta.x]
  415.         mov     [mouse.active_sys_window.new_box.left], eax
  416.         sub     eax, [mouse.active_sys_window.old_box.left]
  417.         sub     [mouse.active_sys_window.new_box.width], eax
  418.  
  419.         mov     eax, [mouse.active_sys_window.new_box.width]
  420.         sub     eax, 127
  421.         jge     @f
  422.         add     [mouse.active_sys_window.new_box.left], eax
  423.         mov     [mouse.active_sys_window.new_box.width], 127
  424.     @@: mov     eax, [mouse.active_sys_window.new_box.left]
  425.         or      eax, eax
  426.         jge     .check_resize_s
  427.         add     [mouse.active_sys_window.new_box.width], eax
  428.         xor     eax, eax
  429.         mov     [mouse.active_sys_window.new_box.left], eax
  430.  
  431.   .check_resize_s:
  432.         test    dl, mouse.WINDOW_RESIZE_S_FLAG
  433.         jz      .check_resize_e
  434.  
  435.         mov     eax, [mouse.state.pos.y]
  436.         add     eax, [mouse.active_sys_window.delta.y]
  437.         sub     eax, [mouse.active_sys_window.old_box.top]
  438.         mov     [mouse.active_sys_window.new_box.height], eax
  439.  
  440.         push    eax
  441.         mov     edi, esi
  442.         shl     edi, 5
  443.         add     edi, window_data
  444.         call    window._.get_rolledup_height
  445.         mov     ecx, eax
  446.         pop     eax
  447.         mov     eax, [mouse.active_sys_window.new_box.height]
  448.         cmp     eax, ecx
  449.         jge     @f
  450.         mov     eax, ecx
  451.         mov     [mouse.active_sys_window.new_box.height], eax
  452.     @@: add     eax, [mouse.active_sys_window.new_box.top]
  453.         cmp     eax, [Screen_Max_Y]
  454.         jle     .check_resize_e
  455.         sub     eax, [Screen_Max_Y]
  456.         neg     eax
  457.         add     [mouse.active_sys_window.new_box.height], eax
  458.         mov     ecx, [Screen_Max_Y]
  459.         cmp     ecx, eax
  460.         jge     .check_resize_e
  461.         mov     [mouse.active_sys_window.new_box.height], ecx
  462.  
  463.   .check_resize_e:
  464.         test    dl, mouse.WINDOW_RESIZE_E_FLAG
  465.         jz      .call_window_handler
  466.  
  467.         mov     eax, [mouse.state.pos.x]
  468.         add     eax, [mouse.active_sys_window.delta.x]
  469.         sub     eax, [mouse.active_sys_window.old_box.left]
  470.         mov     [mouse.active_sys_window.new_box.width], eax
  471.  
  472.         mov     eax, [mouse.active_sys_window.new_box.width]
  473.         cmp     eax, 127
  474.         jge     @f
  475.         mov     eax, 127
  476.         mov     [mouse.active_sys_window.new_box.width], eax
  477.     @@: add     eax, [mouse.active_sys_window.new_box.left]
  478.         cmp     eax, [Screen_Max_X]
  479.         jle     .call_window_handler
  480.         sub     eax, [Screen_Max_X]
  481.         neg     eax
  482.         add     [mouse.active_sys_window.new_box.width], eax
  483.         mov     ecx, [Screen_Max_X]
  484.         cmp     ecx, eax
  485.         jge     .call_window_handler
  486.         mov     [mouse.active_sys_window.new_box.width], ecx
  487.  
  488.   .call_window_handler:
  489.         mov     eax, mouse.active_sys_window.old_box
  490.         mov     ebx, mouse.active_sys_window.new_box
  491.  
  492.         push    esi
  493.         mov     esi, mouse.active_sys_window.old_box
  494.         mov     edi, mouse.active_sys_window.new_box
  495.         mov     ecx, BOX.sizeof / 4
  496.         repe
  497.         cmpsd
  498.         pop     esi
  499.         je      .exit
  500.  
  501.         mov     [mouse.active_sys_window.last_ticks], 0
  502.         call    sys_window_moving_handler
  503.  
  504.   .exit:
  505.         ret
  506.  
  507. align 4
  508. ;------------------------------------------------------------------------------
  509. mouse._.find_sys_window_under_cursor: ;////////////////////////////////////////
  510. ;------------------------------------------------------------------------------
  511. ;? Find system window object which is currently visible on screen and has
  512. ;? mouse cursor within its bounds
  513. ;------------------------------------------------------------------------------
  514. ;< esi = process slot
  515. ;< edi = pointer to WDATA struct
  516. ;------------------------------------------------------------------------------
  517.         mov     esi, [Screen_Max_X]
  518.         inc     esi
  519.         imul    esi, [mouse.state.pos.y]
  520.         add     esi, [_WinMapAddress]
  521.         add     esi, [mouse.state.pos.x]
  522.         movzx   esi, byte[esi]
  523.         mov     edi, esi
  524.         shl     edi, 5
  525.         add     edi, window_data
  526.         ret
  527.  
  528. align 4
  529. ;------------------------------------------------------------------------------
  530. mouse._.activate_sys_window_under_cursor: ;////////////////////////////////////
  531. ;------------------------------------------------------------------------------
  532. ;? <description>
  533. ;------------------------------------------------------------------------------
  534.         ; activate and redraw window under cursor (if necessary)
  535.         call    mouse._.find_sys_window_under_cursor
  536.         movzx   esi, word[WIN_STACK + esi * 2]
  537.         lea     esi, [WIN_POS + esi * 2]
  538.         jmp     waredraw
  539.  
  540. align 4
  541. ;------------------------------------------------------------------------------
  542. mouse._.find_sys_button_under_cursor: ;////////////////////////////////////////
  543. ;------------------------------------------------------------------------------
  544. ;? Find system button object which is currently visible on screen and has
  545. ;? mouse cursor within its bounds
  546. ;------------------------------------------------------------------------------
  547. ;< eax = pack[8(process slot), 24(button id)] or 0
  548. ;< ebx = pack[16(button x coord), 16(button y coord)]
  549. ;------------------------------------------------------------------------------
  550.         push    ecx edx esi edi
  551.  
  552.         call    mouse._.find_sys_window_under_cursor
  553.         mov     edx, esi
  554.  
  555.         ; check if any process button contains cursor
  556.         mov     eax, [BTN_ADDR]
  557.         mov     ecx, [eax]
  558.         imul    esi, ecx, SYS_BUTTON.sizeof
  559.         add     esi, eax
  560.         inc     ecx
  561.         add     esi, SYS_BUTTON.sizeof
  562.  
  563.   .next_button:
  564.         dec     ecx
  565.         jz      .not_found
  566.  
  567.         add     esi, -SYS_BUTTON.sizeof
  568.  
  569.         ; does it belong to our process?
  570.         cmp     dx, [esi + SYS_BUTTON.pslot]
  571.         jne     .next_button
  572.  
  573.         ; does it contain cursor coordinates?
  574.         mov     eax, [mouse.state.pos.x]
  575.         sub     eax, [edi + WDATA.box.left]
  576.         sub     ax, [esi + SYS_BUTTON.left]
  577.         jl      .next_button
  578.         sub     ax, [esi + SYS_BUTTON.width]
  579.         jge     .next_button
  580.         mov     eax, [mouse.state.pos.y]
  581.         sub     eax, [edi + WDATA.box.top]
  582.         sub     ax, [esi + SYS_BUTTON.top]
  583.         jl      .next_button
  584.         sub     ax, [esi + SYS_BUTTON.height]
  585.         jge     .next_button
  586.  
  587.         ; okay, return it
  588.         shl     edx, 24
  589.         mov     eax, dword[esi + SYS_BUTTON.id_hi - 2]
  590.         mov     ax, [esi + SYS_BUTTON.id_lo]
  591.         and     eax, 0x0ffffff
  592.         or      eax, edx
  593.         mov     ebx, dword[esi + SYS_BUTTON.left - 2]
  594.         mov     bx, [esi + SYS_BUTTON.top]
  595.         jmp     .exit
  596.  
  597.   .not_found:
  598.         xor     eax, eax
  599.         xor     ebx, ebx
  600.  
  601.   .exit:
  602.         pop     edi esi edx ecx
  603.         ret
  604.  
  605. align 4
  606. ;------------------------------------------------------------------------------
  607. mouse._.check_sys_window_actions: ;////////////////////////////////////////////
  608. ;------------------------------------------------------------------------------
  609. ;? <description>
  610. ;------------------------------------------------------------------------------
  611. ;< eax = action flags or 0
  612. ;------------------------------------------------------------------------------
  613.         ; is window movable?
  614.         test    byte[edi + WDATA.cl_titlebar + 3], 0x01
  615.         jnz     .no_action
  616.  
  617.         mov     eax, [mouse.state.pos.x]
  618.         mov     ebx, [mouse.state.pos.y]
  619.         sub     eax, [edi + WDATA.box.left]
  620.         sub     ebx, [edi + WDATA.box.top]
  621.  
  622.         ; is there a window titlebar under cursor?
  623.         push    eax
  624.         call    window._.get_titlebar_height
  625.         cmp     ebx, eax
  626.         pop     eax
  627.         jl      .move_action
  628.  
  629.         ; no there isn't, can it be resized then?
  630.         mov     dl, [edi + WDATA.fl_wstyle]
  631.         and     dl, 0x0f
  632.         ; NOTE: dangerous optimization, revise if window types changed;
  633.         ;       this currently implies only types 2 and 3 could be resized
  634.         test    dl, 2
  635.         jz      .no_action
  636.  
  637.         mov     ecx, [edi + WDATA.box.width]
  638.         add     ecx, -window.BORDER_SIZE
  639.         mov     edx, [edi + WDATA.box.height]
  640.         add     edx, -window.BORDER_SIZE
  641.  
  642.         ; is it rolled up?
  643.         test    [edi + WDATA.fl_wstate], WSTATE_ROLLEDUP
  644.         jnz     .resize_w_or_e_action
  645.  
  646.         cmp     eax, window.BORDER_SIZE
  647.         jl      .resize_w_action
  648.         cmp     eax, ecx
  649.         jg      .resize_e_action
  650.         cmp     ebx, edx
  651.         jle     .no_action
  652.  
  653.   .resize_s_action:
  654.         cmp     eax, window.BORDER_SIZE + 10
  655.         jl      .resize_sw_action
  656.         add     ecx, -10
  657.         cmp     eax, ecx
  658.         jge     .resize_se_action
  659.         mov     eax, mouse.WINDOW_RESIZE_S_FLAG
  660.         jmp     .exit
  661.  
  662.   .resize_w_or_e_action:
  663.         cmp     eax, window.BORDER_SIZE + 10
  664.         jl      .resize_w_action.direct
  665.         add     ecx, -10
  666.         cmp     eax, ecx
  667.         jg      .resize_e_action.direct
  668.         jmp     .no_action
  669.  
  670.   .resize_w_action:
  671.         add     edx, -10
  672.         cmp     ebx, edx
  673.         jge     .resize_sw_action
  674.   .resize_w_action.direct:
  675.         mov     eax, mouse.WINDOW_RESIZE_W_FLAG
  676.         jmp     .exit
  677.  
  678.   .resize_e_action:
  679.         add     edx, -10
  680.         cmp     ebx, edx
  681.         jge     .resize_se_action
  682.   .resize_e_action.direct:
  683.         mov     eax, mouse.WINDOW_RESIZE_E_FLAG
  684.         jmp     .exit
  685.  
  686.   .resize_sw_action:
  687.         mov     eax, mouse.WINDOW_RESIZE_SW_FLAG
  688.         jmp     .exit
  689.  
  690.   .resize_se_action:
  691.         mov     eax, mouse.WINDOW_RESIZE_SE_FLAG
  692.         jmp     .exit
  693.  
  694.   .move_action:
  695.         mov     eax, mouse.WINDOW_MOVE_FLAG
  696.         jmp     .exit
  697.  
  698.   .no_action:
  699.         xor     eax, eax
  700.  
  701.   .exit:
  702.         ret
  703.