forked from KolibriOS/kolibrios
148 lines
3.8 KiB
PHP
148 lines
3.8 KiB
PHP
; adjustWindowDimensions
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; adjust menut window dimensions to get a certain work area size.
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; or so. who on earth cares anyway, i certinaly don't, i'm just
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; writing this code because i've got to kill time somehow...
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;
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; Copyright (c) 2002 Thomas Mathys
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; killer@vantage.ch
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;
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; This program is free software; you can redistribute it and/or modify
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; it under the terms of the GNU General Public License as published by
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; the Free Software Foundation; either version 2 of the License, or
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; (at your option) any later version.
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;
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; This program is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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; GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public License
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; along with this program; if not, write to the Free Software
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; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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;
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%ifndef _ADJSTWND_INC
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%define _ADJSTWND_INC
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;window types
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ADJSTWND_TYPE_SKINNED equ 0
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;********************************************************************
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; adjust window dimensions to get a certain work area size
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;
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; - first the window width and height are adjusted
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; and clamped if they're too large for the screen.
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; - then the window positions are adjusted, if the
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; window goes out of the screen.
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;
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; input:
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; eax window type, one of the ADJSTWND_TYPE_xxx constants
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; ebx window x position
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; ecx window y position
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; edx desired work area width
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; esi desired work area height
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;
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; output:
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; eax return code. 0 = ok, -1 = invalid window type
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; ebx adjusted window x position
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; ecx adjusted window y position
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; edx window width to get desired work area width
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; esi window height to get desired work area height
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;
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; destroys:
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; nothing
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;
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; normally x and y are the upper left corner of the window,
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; relative to the upper left corner of the screen.
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; if you pass a negative x or y it will be treated as the
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; lower right corner of the window, relative to the lower
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; right corner of the screen.
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;********************************************************************
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adjustWindowDimensions:
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push edi
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push ebp
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pushfd
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; adjust window dimensions, depending on the window type
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cmp eax,ADJSTWND_TYPE_SKINNED
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je .adjust_skinned
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mov eax,-1 ; invalid window type,
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jmp .bye ; return error code
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; clamp window dimensions
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.clamp:
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mov eax,MOS_SC_GETSCREENMAX ; get screen dimensions
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int 0x40
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mov edi,eax ; edi = screen width
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shr edi,16
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mov ebp,eax ; ebp = screen height
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and ebp,0xffff
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cmp edx,edi ; window width > screen width ?
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jna .widthok
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mov edx,edi ; yes -> use screen width
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.widthok:
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cmp esi,ebp ; wnd height > screen height ?
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jna .heightok
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mov esi,ebp ; yes -> use screen height
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.heightok:
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; adjust x position
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or ebx,ebx ; do the lower right corner
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jns .foo ; stuff if x is negative.
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add ebx,edi
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sub ebx,edx
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.foo:
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or ebx,ebx ; x < 0 ?
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jns .xnotnegative
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xor ebx,ebx ; yes -> x = 0
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.xnotnegative:
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mov eax,ebx ; x + width > screen width ?
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add eax,edx
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cmp eax,edi
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jna .xok
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sub eax,edi ; yes -> adjust
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sub ebx,eax
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.xok:
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; adjust y position
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or ecx,ecx ; do the lower right corner
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jns .bar ; stuff if y is negative.
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add ecx,ebp
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sub ecx,esi
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.bar:
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or ecx,ecx ; y < 0 ?
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jns .ynotnegative
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xor ecx,ecx ; yes -> y = 0
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.ynotnegative:
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mov eax,ecx ; y + height > screen height ?
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add eax,esi
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cmp eax,ebp
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jna .yok
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sub eax,ebp ; yes -> adjust
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sub ecx,eax
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.yok:
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.done:
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xor eax,eax
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.bye:
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popfd
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pop ebp
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pop edi
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ret
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.adjust_skinned:
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; adjust width (edx)
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add edx,MOS_WND_SKIN_BORDER_LEFT+MOS_WND_SKIN_BORDER_RIGHT
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; adjust height (esi). we need the skin height to do this.
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push ebx
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mov eax,MOS_SC_WINDOWPROPERTIES
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mov ebx,4
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int 0x40
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lea esi,[esi+eax+MOS_WND_SKIN_BORDER_BOTTOM]
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pop ebx
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jmp .clamp
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%endif
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