janwas
836cd08d5e
also: - renamed wdll to delay_load, and wdll_ver to dll_ver - removed empty wcpu This was SVN commit r3751.
648 lines
19 KiB
C++
648 lines
19 KiB
C++
/**
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* =========================================================================
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* File : wsysdep.cpp
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* Project : 0 A.D.
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* Description : Windows backend of the sysdep interface
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*
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* @author Jan.Wassenberg@stud.uni-karlsruhe.de
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* =========================================================================
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*/
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/*
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* Copyright (c) 2003-2005 Jan Wassenberg
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*
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* Redistribution and/or modification are also permitted under the
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* terms of the GNU General Public License as published by the
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* Free Software Foundation (version 2 or later, at your option).
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include "precompiled.h"
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#include "win_internal.h" // includes windows.h; must come before shlobj
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#include <shlobj.h> // pick_dir
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#include "lib.h"
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#include "posix.h"
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#include "error_dialog.h"
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#include "lib/res/graphics/tex.h"
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#if MSC_VERSION
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#pragma comment(lib, "shell32.lib") // for sys_pick_directory SH* calls
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#endif
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void sys_display_msg(const char* caption, const char* msg)
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{
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MessageBoxA(0, msg, caption, MB_ICONEXCLAMATION|MB_TASKMODAL|MB_SETFOREGROUND);
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}
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void sys_display_msgw(const wchar_t* caption, const wchar_t* msg)
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{
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MessageBoxW(0, msg, caption, MB_ICONEXCLAMATION|MB_TASKMODAL|MB_SETFOREGROUND);
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}
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// workaround: apparently PCH contents may be included after the headers.
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// malloc.h is defining alloca to _alloca and then VC complains about us
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// redefining an intrinsic. so, stomp on the macro here.
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#undef alloca
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void* alloca(size_t size)
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{
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void* ret;
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__try
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{
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ret = _alloca(size);
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}
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// if stack overflow, handle it; otherwise, continue handler search.
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__except(GetExceptionCode() == STATUS_STACK_OVERFLOW)
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{
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// restore guard page - necessary on XP, works everywhere.
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_resetstkoflw();
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ret = 0;
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}
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return ret;
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}
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//-----------------------------------------------------------------------------
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// "program error" dialog (triggered by debug_assert and exception)
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//-----------------------------------------------------------------------------
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// we need to know the app's main window for the error dialog, so that
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// it is modal and actually stops the app. if it keeps running while
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// we're reporting an error, it'll probably crash and take down the
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// error window before it is seen (since we're in the same process).
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static BOOL CALLBACK is_this_our_window(HWND hWnd, LPARAM lParam)
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{
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DWORD pid;
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DWORD tid = GetWindowThreadProcessId(hWnd, &pid);
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UNUSED2(tid); // the function can't fail
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if(pid == GetCurrentProcessId())
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{
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*(HWND*)lParam = hWnd;
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return FALSE; // done
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}
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return TRUE; // keep calling
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}
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// try to determine the app's main window by enumerating all
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// top-level windows and comparing their PIDs.
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// returns 0 if not found, e.g. if the app doesn't have one yet.
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static HWND get_app_main_window()
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{
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HWND our_window = 0;
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DWORD ret = EnumWindows(is_this_our_window, (LPARAM)&our_window);
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UNUSED2(ret);
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// the callback returns FALSE when it has found the window
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// (so as not to waste time); EnumWindows then returns 0.
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// therefore, we can't check this; just return our_window.
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return our_window;
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}
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// support for resizing the dialog / its controls
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// (have to do this manually - grr)
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static POINTS dlg_client_origin;
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static POINTS dlg_prev_client_size;
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static const uint ANCHOR_LEFT = 0x01;
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static const uint ANCHOR_RIGHT = 0x02;
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static const uint ANCHOR_TOP = 0x04;
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static const uint ANCHOR_BOTTOM = 0x08;
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static const uint ANCHOR_ALL = 0x0f;
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static void dlg_resize_control(HWND hDlg, int dlg_item, int dx,int dy, uint anchors)
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{
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HWND hControl = GetDlgItem(hDlg, dlg_item);
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RECT r;
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GetWindowRect(hControl, &r);
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int w = r.right - r.left, h = r.bottom - r.top;
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int x = r.left - dlg_client_origin.x, y = r.top - dlg_client_origin.y;
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if(anchors & ANCHOR_RIGHT)
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{
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// right only
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if(!(anchors & ANCHOR_LEFT))
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x += dx;
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// horizontal (stretch width)
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else
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w += dx;
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}
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if(anchors & ANCHOR_BOTTOM)
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{
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// bottom only
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if(!(anchors & ANCHOR_TOP))
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y += dy;
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// vertical (stretch height)
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else
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h += dy;
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}
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SetWindowPos(hControl, 0, x,y, w,h, SWP_NOZORDER);
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}
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static void dlg_resize(HWND hDlg, WPARAM wParam, LPARAM lParam)
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{
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// 'minimize' was clicked. we need to ignore this, otherwise
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// dx/dy would reduce some control positions to less than 0.
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// since Windows clips them, we wouldn't later be able to
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// reconstruct the previous values when 'restoring'.
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if(wParam == SIZE_MINIMIZED)
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return;
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// first call for this dialog instance. WM_MOVE hasn't been sent yet,
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// so dlg_client_origin are invalid => must not call resize_control().
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// we need to set dlg_prev_client_size for the next call before exiting.
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bool first_call = (dlg_prev_client_size.y == 0);
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POINTS dlg_client_size = MAKEPOINTS(lParam);
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int dx = dlg_client_size.x - dlg_prev_client_size.x;
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int dy = dlg_client_size.y - dlg_prev_client_size.y;
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dlg_prev_client_size = dlg_client_size;
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if(first_call)
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return;
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dlg_resize_control(hDlg, IDC_CONTINUE, dx,dy, ANCHOR_LEFT|ANCHOR_BOTTOM);
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dlg_resize_control(hDlg, IDC_SUPPRESS, dx,dy, ANCHOR_LEFT|ANCHOR_BOTTOM);
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dlg_resize_control(hDlg, IDC_BREAK , dx,dy, ANCHOR_LEFT|ANCHOR_BOTTOM);
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dlg_resize_control(hDlg, IDC_EXIT , dx,dy, ANCHOR_LEFT|ANCHOR_BOTTOM);
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dlg_resize_control(hDlg, IDC_COPY , dx,dy, ANCHOR_RIGHT|ANCHOR_BOTTOM);
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dlg_resize_control(hDlg, IDC_EDIT1 , dx,dy, ANCHOR_ALL);
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}
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struct DialogParams
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{
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const wchar_t* text;
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int flags;
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};
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static INT_PTR CALLBACK error_dialog_proc(HWND hDlg, unsigned int msg, WPARAM wParam, LPARAM lParam)
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{
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switch(msg)
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{
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case WM_INITDIALOG:
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{
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const DialogParams* params = (const DialogParams*)lParam;
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HWND hWnd;
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// need to reset for new instance of dialog
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dlg_client_origin.x = dlg_client_origin.y = 0;
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dlg_prev_client_size.x = dlg_prev_client_size.y = 0;
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if(!(params->flags & DE_ALLOW_SUPPRESS))
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{
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hWnd = GetDlgItem(hDlg, IDC_SUPPRESS);
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EnableWindow(hWnd, FALSE);
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}
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// set fixed font for readability
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hWnd = GetDlgItem(hDlg, IDC_EDIT1);
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HGDIOBJ hObj = (HGDIOBJ)GetStockObject(SYSTEM_FIXED_FONT);
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LPARAM redraw = FALSE;
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SendMessage(hWnd, WM_SETFONT, (WPARAM)hObj, redraw);
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SetDlgItemTextW(hDlg, IDC_EDIT1, params->text);
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return TRUE; // set default keyboard focus
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}
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case WM_SYSCOMMAND:
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// close dialog if [X] is clicked (doesn't happen automatically)
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// note: lower 4 bits are reserved
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if((wParam & 0xFFF0) == SC_CLOSE)
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{
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EndDialog(hDlg, 0);
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return 0; // processed
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}
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break;
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// return 0 if processed, otherwise break
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case WM_COMMAND:
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switch(wParam)
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{
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case IDC_COPY:
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{
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// (allocating on the stack would be easier+safer, but this is
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// too big.)
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const size_t max_chars = 128*KiB;
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wchar_t* buf = (wchar_t*)malloc(max_chars*sizeof(wchar_t));
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if(buf)
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{
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GetDlgItemTextW(hDlg, IDC_EDIT1, buf, max_chars);
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sys_clipboard_set(buf);
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free(buf);
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}
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return 0;
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}
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case IDC_CONTINUE:
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EndDialog(hDlg, ER_CONTINUE);
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return 0;
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case IDC_SUPPRESS:
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EndDialog(hDlg, ER_SUPPRESS);
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return 0;
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case IDC_BREAK:
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EndDialog(hDlg, ER_BREAK);
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return 0;
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case IDC_EXIT:
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EndDialog(hDlg, ER_EXIT);
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return 0;
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default:
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break;
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}
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break;
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case WM_MOVE:
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dlg_client_origin = MAKEPOINTS(lParam);
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break;
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case WM_GETMINMAXINFO:
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{
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// we must make sure resize_control will never set negative coords -
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// Windows would clip them, and its real position would be lost.
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// restrict to a reasonable and good looking minimum size [pixels].
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MINMAXINFO* mmi = (MINMAXINFO*)lParam;
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mmi->ptMinTrackSize.x = 407;
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mmi->ptMinTrackSize.y = 159; // determined experimentally
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return 0;
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}
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case WM_SIZE:
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dlg_resize(hDlg, wParam, lParam);
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break;
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default:
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break;
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}
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// we didn't process the message; caller will perform default action.
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return FALSE;
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}
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// show error dialog with the given text and return user's reaction.
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// exits directly if 'exit' is clicked.
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ErrorReaction sys_display_error(const wchar_t* text, int flags)
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{
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// note: other threads might still be running, crash and take down the
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// process before we have a chance to display this error message.
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// ideally we would suspend them all and resume when finished; however,
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// they may be holding systemwide locks (e.g. heap or loader) that
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// are potentially needed by DialogBoxParam. in that case, deadlock
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// would result; this is much worse than a crash because no error
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// at all is displayed to the end-user. therefore, do nothing here.
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// temporarily remove any pending quit message from the queue because
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// it would prevent the dialog from being displayed (DialogBoxParam
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// returns IDOK without doing anything). will be restored below.
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// notes:
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// - this isn't only relevant at exit - Windows also posts one if
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// window init fails. therefore, it is important that errors can be
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// displayed regardless.
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// - by passing hWnd=0, we check all windows belonging to the current
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// thread. there is no reason to use hWndParent below.
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MSG msg;
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BOOL quit_pending = PeekMessage(&msg, 0, WM_QUIT, WM_QUIT, PM_REMOVE);
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const HINSTANCE hInstance = GetModuleHandle(0);
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LPCSTR lpTemplateName = MAKEINTRESOURCE(IDD_DIALOG1);
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const DialogParams params = { text, flags };
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// get the enclosing app's window handle. we can't just pass 0 or
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// the desktop window because the dialog must be modal (the app
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// must not crash/continue to run before it has been displayed).
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const HWND hWndParent = get_app_main_window();
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INT_PTR ret = DialogBoxParam(hInstance, lpTemplateName, hWndParent, error_dialog_proc, (LPARAM)¶ms);
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if(quit_pending)
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PostQuitMessage((int)msg.wParam);
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// failed; warn user and make sure we return an ErrorReaction.
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if(ret == 0 || ret == -1)
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{
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debug_display_msgw(L"Error", L"Unable to display detailed error dialog.");
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return ER_CONTINUE;
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}
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return (ErrorReaction)ret;
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}
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//-----------------------------------------------------------------------------
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// clipboard
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//-----------------------------------------------------------------------------
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// "copy" text into the clipboard. replaces previous contents.
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LibError sys_clipboard_set(const wchar_t* text)
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{
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const HWND new_owner = 0;
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// MSDN: passing 0 requests the current task be granted ownership;
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// there's no need to pass our window handle.
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if(!OpenClipboard(new_owner))
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WARN_RETURN(ERR_FAIL);
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EmptyClipboard();
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LibError err = ERR_FAIL;
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{
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const size_t len = wcslen(text);
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HGLOBAL hMem = GlobalAlloc(GMEM_MOVEABLE, (len+1) * sizeof(wchar_t));
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if(!hMem)
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{
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err = ERR_NO_MEM;
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goto fail;
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}
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wchar_t* copy = (wchar_t*)GlobalLock(hMem);
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if(copy)
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{
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wcscpy(copy, text);
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GlobalUnlock(hMem);
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if(SetClipboardData(CF_UNICODETEXT, hMem) != 0)
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err = ERR_OK;
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}
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}
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fail:
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CloseClipboard();
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return err;
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}
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// allow "pasting" from clipboard. returns the current contents if they
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// can be represented as text, otherwise 0.
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// when it is no longer needed, the returned pointer must be freed via
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// sys_clipboard_free. (NB: not necessary if zero, but doesn't hurt)
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wchar_t* sys_clipboard_get()
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{
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wchar_t* ret = 0;
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const HWND new_owner = 0;
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// MSDN: passing 0 requests the current task be granted ownership;
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// there's no need to pass our window handle.
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if(!OpenClipboard(new_owner))
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return 0;
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// Windows NT/2000+ auto convert UNICODETEXT <-> TEXT
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HGLOBAL hMem = GetClipboardData(CF_UNICODETEXT);
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if(hMem != 0)
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{
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wchar_t* text = (wchar_t*)GlobalLock(hMem);
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if(text)
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{
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SIZE_T size = GlobalSize(hMem);
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wchar_t* copy = (wchar_t*)malloc(size); // unavoidable
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if(copy)
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{
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wcscpy(copy, text);
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ret = copy;
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}
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GlobalUnlock(hMem);
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}
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}
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CloseClipboard();
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return ret;
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}
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// frees memory used by <copy>, which must have been returned by
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// sys_clipboard_get. see note above.
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LibError sys_clipboard_free(wchar_t* copy)
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{
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free(copy);
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return ERR_OK;
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}
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//-----------------------------------------------------------------------------
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// mouse cursor
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//-----------------------------------------------------------------------------
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static void* ptr_from_HICON(HICON hIcon)
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{
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return (void*)(uintptr_t)hIcon;
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}
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static void* ptr_from_HCURSOR(HCURSOR hCursor)
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{
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return (void*)(uintptr_t)hCursor;
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}
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static HICON HICON_from_ptr(void* p)
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{
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return (HICON)(uintptr_t)p;
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}
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static HCURSOR HCURSOR_from_ptr(void* p)
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{
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return (HCURSOR)(uintptr_t)p;
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}
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// creates a cursor from the given image.
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// w, h specify image dimensions [pixels]. limit is implementation-
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// dependent; 32x32 is typical and safe.
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// bgra_img is the cursor image (BGRA format, bottom-up).
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// it is no longer needed and can be freed after this call returns.
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// hotspot (hx,hy) is the offset from its upper-left corner to the
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// position where mouse clicks are registered.
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// return: negative error code, or 0 on success. cursor is filled with
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// a pointer and undefined on failure. it must be sys_cursor_free-ed
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// when no longer needed.
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LibError sys_cursor_create(uint w, uint h, void* bgra_img,
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uint hx, uint hy, void** cursor)
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{
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// MSDN says selecting this HBITMAP into a DC is slower since we use
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// CreateBitmap; bpp/format must be checked against those of the DC.
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// this is the simplest way and we don't care about slight performance
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// differences because this is typically only called once.
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HBITMAP hbmColour = CreateBitmap(w, h, 1, 32, bgra_img);
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// CreateIconIndirect doesn't access this; we just need to pass
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// an empty bitmap.
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HBITMAP hbmMask = CreateBitmap(w, h, 1, 1, 0);
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// create the cursor (really an icon; they differ only in
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// fIcon and the hotspot definitions).
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ICONINFO ii;
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ii.fIcon = FALSE; // cursor
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ii.xHotspot = hx;
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ii.yHotspot = hy;
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ii.hbmMask = hbmMask;
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ii.hbmColor = hbmColour;
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HICON hIcon = CreateIconIndirect(&ii);
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// CreateIconIndirect makes copies, so we no longer need these.
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DeleteObject(hbmMask);
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DeleteObject(hbmColour);
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if(!hIcon) // not INVALID_HANDLE_VALUE
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WARN_RETURN(ERR_FAIL);
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*cursor = ptr_from_HICON(hIcon);
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return ERR_OK;
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}
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LibError sys_cursor_create_empty(void **cursor)
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{
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u8 bgra_img[] = {0, 0, 0, 0};
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return sys_cursor_create(1, 1, bgra_img, 0, 0, cursor);
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}
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// replaces the current system cursor with the one indicated. need only be
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// called once per cursor; pass 0 to restore the default.
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LibError sys_cursor_set(void* cursor)
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{
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// restore default cursor.
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if(!cursor)
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cursor = ptr_from_HCURSOR(LoadCursor(0, MAKEINTRESOURCE(IDC_ARROW)));
|
|
|
|
(void)SetCursor(HCURSOR_from_ptr(cursor));
|
|
// return value (previous cursor) is useless.
|
|
|
|
return ERR_OK;
|
|
}
|
|
|
|
|
|
// destroys the indicated cursor and frees its resources. if it is
|
|
// currently the system cursor, the default cursor is restored first.
|
|
LibError sys_cursor_free(void* cursor)
|
|
{
|
|
// bail now to prevent potential confusion below; there's nothing to do.
|
|
if(!cursor)
|
|
return ERR_OK;
|
|
|
|
// if the cursor being freed is active, restore the default arrow
|
|
// (just for safety).
|
|
if(ptr_from_HCURSOR(GetCursor()) == cursor)
|
|
WARN_ERR(sys_cursor_set(0));
|
|
|
|
BOOL ok = DestroyIcon(HICON_from_ptr(cursor));
|
|
return LibError_from_win32(ok);
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// misc
|
|
//-----------------------------------------------------------------------------
|
|
|
|
// OS-specific backend for error_description_r.
|
|
// NB: it is expected to be rare that OS return/error codes are actually
|
|
// seen by user code, but we still translate them for completeness.
|
|
LibError sys_error_description_r(int err, char* buf, size_t max_chars)
|
|
{
|
|
// not in our range (Win32 error numbers are positive)
|
|
if(err < 0)
|
|
return ERR_FAIL; // NOWARN
|
|
|
|
const LPCVOID source = 0; // ignored (we're not using FROM_HMODULE etc.)
|
|
const DWORD lang_id = 0; // look for neutral, then current locale
|
|
va_list* args = 0; // we don't care about "inserts"
|
|
DWORD chars_output = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, source, (DWORD)err,
|
|
lang_id, buf, (DWORD)max_chars, args);
|
|
if(!chars_output)
|
|
WARN_RETURN(ERR_FAIL);
|
|
debug_assert(chars_output < max_chars);
|
|
return ERR_OK;
|
|
}
|
|
|
|
|
|
// determine filename of the module to whom the given address belongs.
|
|
// useful for handling exceptions in other modules.
|
|
// <path> receives full path to module; it must hold at least MAX_PATH chars.
|
|
// on error, it is set to L"".
|
|
// return path for convenience.
|
|
wchar_t* sys_get_module_filename(void* addr, wchar_t* path)
|
|
{
|
|
path[0] = '\0'; // in case either API call below fails
|
|
wchar_t* module_filename = path;
|
|
|
|
MEMORY_BASIC_INFORMATION mbi;
|
|
if(VirtualQuery(addr, &mbi, sizeof(mbi)))
|
|
{
|
|
HMODULE hModule = (HMODULE)mbi.AllocationBase;
|
|
if(GetModuleFileNameW(hModule, path, MAX_PATH))
|
|
module_filename = wcsrchr(path, '\\')+1;
|
|
// note: GetModuleFileName returns full path => a '\\' exists
|
|
}
|
|
|
|
return module_filename;
|
|
}
|
|
|
|
|
|
// store full path to the current executable.
|
|
// returns 0 or a negative error code.
|
|
// useful for determining installation directory, e.g. for VFS.
|
|
inline LibError sys_get_executable_name(char* n_path, size_t buf_size)
|
|
{
|
|
DWORD nbytes = GetModuleFileName(0, n_path, (DWORD)buf_size);
|
|
return nbytes? ERR_OK : ERR_FAIL;
|
|
}
|
|
|
|
|
|
// callback for shell directory picker: used to set
|
|
// starting directory to the current directory (for user convenience).
|
|
static int CALLBACK browse_cb(HWND hWnd, unsigned int msg, LPARAM UNUSED(lParam), LPARAM ldata)
|
|
{
|
|
if(msg == BFFM_INITIALIZED)
|
|
{
|
|
const char* cur_dir = (const char*)ldata;
|
|
SendMessage(hWnd, BFFM_SETSELECTIONA, 1, (LPARAM)cur_dir);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
// have the user specify a directory via OS dialog.
|
|
// stores its full path in the given buffer, which must hold at least
|
|
// PATH_MAX chars.
|
|
// returns 0 on success or a negative error code.
|
|
LibError sys_pick_directory(char* path, size_t buf_size)
|
|
{
|
|
// bring up dialog; set starting directory to current working dir.
|
|
WARN_IF_FALSE(GetCurrentDirectory((DWORD)buf_size, path));
|
|
BROWSEINFOA bi;
|
|
memset(&bi, 0, sizeof(bi));
|
|
bi.ulFlags = BIF_RETURNONLYFSDIRS;
|
|
bi.lpfn = (BFFCALLBACK)browse_cb;
|
|
bi.lParam = (LPARAM)path;
|
|
ITEMIDLIST* pidl = SHBrowseForFolderA(&bi);
|
|
|
|
// translate ITEMIDLIST to string. note: SHGetPathFromIDList doesn't
|
|
// support a user-specified char limit *sigh*
|
|
debug_assert(buf_size >= MAX_PATH); //
|
|
BOOL ok = SHGetPathFromIDList(pidl, path);
|
|
|
|
// free the ITEMIDLIST
|
|
IMalloc* p_malloc;
|
|
SHGetMalloc(&p_malloc);
|
|
p_malloc->Free(pidl);
|
|
p_malloc->Release();
|
|
|
|
return LibError_from_win32(ok);
|
|
}
|
|
|