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/*
* A library for storing parameters in the registry.
*
* Jonathan Westhues, 2002
*/
#include <windows.h>
#include <stdlib.h>
#include <stdio.h>
/*
* store a window's position in the registry, or fail silently if the registry calls don't work
*/
void FreezeWindowPosF(HWND hwnd, char *subKey, char *name)
{
RECT r;
GetWindowRect(hwnd, &r);
HKEY software;
if(RegOpenKeyEx(HKEY_CURRENT_USER, "Software", 0, KEY_ALL_ACCESS, &software) != ERROR_SUCCESS)
return;
char *keyName = (char *)malloc(strlen(name) + 30);
if(!keyName)
return;
HKEY sub;
if(RegCreateKeyEx(software, subKey, 0, "", REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, NULL, &sub, NULL) != ERROR_SUCCESS)
return;
sprintf(keyName, "%s_left", name);
if(RegSetValueEx(sub, keyName, 0, REG_DWORD, (BYTE *)&(r.left), sizeof(DWORD)) != ERROR_SUCCESS)
return;
sprintf(keyName, "%s_right", name);
if(RegSetValueEx(sub, keyName, 0, REG_DWORD, (BYTE *)&(r.right), sizeof(DWORD)) != ERROR_SUCCESS)
return;
sprintf(keyName, "%s_top", name);
if(RegSetValueEx(sub, keyName, 0, REG_DWORD, (BYTE *)&(r.top), sizeof(DWORD)) != ERROR_SUCCESS)
return;
sprintf(keyName, "%s_bottom", name);
if(RegSetValueEx(sub, keyName, 0, REG_DWORD, (BYTE *)&(r.bottom), sizeof(DWORD)) != ERROR_SUCCESS)
return;
sprintf(keyName, "%s_maximized", name);
DWORD v = IsZoomed(hwnd);
if(RegSetValueEx(sub, keyName, 0, REG_DWORD, (BYTE *)&(v), sizeof(DWORD)) != ERROR_SUCCESS)
return;
free(keyName);
}
static void Clamp(LONG *v, LONG min, LONG max)
{
if(*v < min) *v = min;
if(*v > max) *v = max;
}
/*
* retrieve a window's position from the registry, or do nothing if there is no info saved
*/
void ThawWindowPosF(HWND hwnd, char *subKey, char *name)
{
HKEY software;
if(RegOpenKeyEx(HKEY_CURRENT_USER, "Software", 0, KEY_ALL_ACCESS, &software) != ERROR_SUCCESS)
return;
HKEY sub;
if(RegOpenKeyEx(software, subKey, 0, KEY_ALL_ACCESS, &sub) != ERROR_SUCCESS)
return;
char *keyName = (char *)malloc(strlen(name) + 30);
if(!keyName)
return;
DWORD l;
RECT r;
sprintf(keyName, "%s_left", name);
l = sizeof(DWORD);
if(RegQueryValueEx(sub, keyName, NULL, NULL, (BYTE *)&(r.left), &l) != ERROR_SUCCESS)
return;
sprintf(keyName, "%s_right", name);
l = sizeof(DWORD);
if(RegQueryValueEx(sub, keyName, NULL, NULL, (BYTE *)&(r.right), &l) != ERROR_SUCCESS)
return;
sprintf(keyName, "%s_top", name);
l = sizeof(DWORD);
if(RegQueryValueEx(sub, keyName, NULL, NULL, (BYTE *)&(r.top), &l) != ERROR_SUCCESS)
return;
sprintf(keyName, "%s_bottom", name);
l = sizeof(DWORD);
if(RegQueryValueEx(sub, keyName, NULL, NULL, (BYTE *)&(r.bottom), &l) != ERROR_SUCCESS)
return;
sprintf(keyName, "%s_maximized", name);
DWORD v;
l = sizeof(DWORD);
if(RegQueryValueEx(sub, keyName, NULL, NULL, (BYTE *)&v, &l) != ERROR_SUCCESS)
return;
if(v)
ShowWindow(hwnd, SW_MAXIMIZE);
RECT dr;
GetWindowRect(GetDesktopWindow(), &dr);
// If it somehow ended up off-screen, then put it back.
Clamp(&(r.left), dr.left, dr.right);
Clamp(&(r.right), dr.left, dr.right);
Clamp(&(r.top), dr.top, dr.bottom);
Clamp(&(r.bottom), dr.top, dr.bottom);
if(r.right - r.left < 100) {
r.left -= 300; r.right += 300;
}
if(r.bottom - r.top < 100) {
r.top -= 300; r.bottom += 300;
}
Clamp(&(r.left), dr.left, dr.right);
Clamp(&(r.right), dr.left, dr.right);
Clamp(&(r.top), dr.top, dr.bottom);
Clamp(&(r.bottom), dr.top, dr.bottom);
MoveWindow(hwnd, r.left, r.top, r.right - r.left, r.bottom - r.top, TRUE);
free(keyName);
}
/*
* store a DWORD setting in the registry
*/
void FreezeDWORDF(DWORD val, char *subKey, char *name)
{
HKEY software;
if(RegOpenKeyEx(HKEY_CURRENT_USER, "Software", 0, KEY_ALL_ACCESS, &software) != ERROR_SUCCESS)
return;
HKEY sub;
if(RegCreateKeyEx(software, subKey, 0, "", REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, NULL, &sub, NULL) != ERROR_SUCCESS)
return;
if(RegSetValueEx(sub, name, 0, REG_DWORD, (BYTE *)&val, sizeof(DWORD)) != ERROR_SUCCESS)
return;
}
/*
* retrieve a DWORD setting, or return the default if that setting is unavailable
*/
DWORD ThawDWORDF(DWORD val, char *subKey, char *name)
{
HKEY software;
if(RegOpenKeyEx(HKEY_CURRENT_USER, "Software", 0, KEY_ALL_ACCESS, &software) != ERROR_SUCCESS)
return val;
HKEY sub;
if(RegOpenKeyEx(software, subKey, 0, KEY_ALL_ACCESS, &sub) != ERROR_SUCCESS)
return val;
DWORD l = sizeof(DWORD);
DWORD v;
if(RegQueryValueEx(sub, name, NULL, NULL, (BYTE *)&v, &l) != ERROR_SUCCESS)
return val;
return v;
}
/*
* store a string setting in the registry
*/
void FreezeStringF(char *val, char *subKey, char *name)
{
HKEY software;
if(RegOpenKeyEx(HKEY_CURRENT_USER, "Software", 0, KEY_ALL_ACCESS, &software) != ERROR_SUCCESS)
return;
HKEY sub;
if(RegCreateKeyEx(software, subKey, 0, "", REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, NULL, &sub, NULL) != ERROR_SUCCESS)
return;
if(RegSetValueEx(sub, name, 0, REG_SZ, (BYTE *)val, strlen(val)+1) != ERROR_SUCCESS)
return;
}
/*
* retrieve a string setting, or return the default if that setting is unavailable
*/
void ThawStringF(char *val, int max, char *subKey, char *name)
{
HKEY software;
if(RegOpenKeyEx(HKEY_CURRENT_USER, "Software", 0, KEY_ALL_ACCESS, &software) != ERROR_SUCCESS)
return;
HKEY sub;
if(RegOpenKeyEx(software, subKey, 0, KEY_ALL_ACCESS, &sub) != ERROR_SUCCESS)
return;
DWORD l = max;
if(RegQueryValueEx(sub, name, NULL, NULL, (BYTE *)val, &l) != ERROR_SUCCESS)
return;
if(l >= (DWORD)max) return;
val[l] = '\0';
return;
}
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