RegPlus/help.cpp at main · FireBlade211/RegPlus · GitHub

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///
///	help.cpp:
///		Provides methods for displaying help information.
///

#include "help.h"
#include "macro.h"
#include "utility.h"
#include <string>
#include <htmlhelp.h>
#include <tchar.h>
#include <shlwapi.h>
#include "mdichild.h"
#include <windowsx.h>

void ShowCmdHelpDialog(HWND hwnd)
{
	MessageBox(hwnd, (STR("Syntax: \n")
		+ STR("   RegPlus.exe [<PATH>] [/go] [/?] [/h] [/help]\n\n")
		+ STR("Parameters:\n")
		+ STR("   <PATH>      The registry path to open. Can include short\n")
		+ STR("                       root key names (e.g, HKEY_LOCAL_MACHINE\n")
		+ STR("                       -> HKLM) (optional)\n\n")
		+ STR("Options:\n")
		+ STR("   /go                 Open the Go to Key dialog to open RegPlus\n")
		+ STR("                          directly to a key.\n")
		+ STR("   /?, /h, /help   Show this help message.")
		).c_str(), TEXT("Command-line usage"), MB_ICONINFORMATION);
}

void OpenHelpFile(HWND hwnd, LPCWSTR lpTopic)
{
	HMODULE hLib = LoadLibrary(TEXT("hhctrl.ocx"));

	if (hLib)
	{
		typedef HWND(WINAPI* PFN_HtmlHelpW)(
			HWND      hwndCaller,
			LPCWSTR   pszFile,
			UINT      uCommand,
			DWORD_PTR dwData
		);

		PFN_HtmlHelpW pHtmlHelpW = (PFN_HtmlHelpW)GetProcAddress(hLib, "HtmlHelpW");

		if (pHtmlHelpW)
		{
			TCHAR bufExe[MAX_PATH] = TEXT("");
			GetModuleFileName(nullptr, bufExe, MAX_PATH);
			PathRemoveFileSpec(bufExe);

			WCHAR bufChm[MAX_PATH] = L"";
			if (lpTopic)
				swprintf_s(bufChm, MAX_PATH, TEXT("%s\\help.chm::/%s"), bufExe, lpTopic);
			else
				swprintf_s(bufChm, MAX_PATH, TEXT("%s\\help.chm"), bufExe);

			auto result = pHtmlHelpW(hwnd, bufChm, HH_DISPLAY_TOC, NULL);

			if (!result)
			{
				HH_LAST_ERROR hhle = {};
				hhle.cbStruct = sizeof(hhle);

				result = pHtmlHelpW(hwnd, NULL, HH_GET_LAST_ERROR, PTR(DWORD_PTR, LPHH_LAST_ERROR, &hhle));

				if (result && FAILED(hhle.hr) && hhle.description)
				{
					TCHAR buffer[256] = TEXT("");
					_stprintf_s(buffer, 256, TEXT("Could not display the help contents.\n\n%s"), hhle.description);

					MessageBox(hwnd, buffer, NULL, MB_ICONWARNING);

					SysFreeString(hhle.description);
 				}
			}
			else
			{
				EnumChildWindows(result, [](HWND hChild, LPARAM lp) -> BOOL CALLBACK {
					TCHAR bufClass[256] = TEXT("");
					GetClassName(hChild, bufClass, 256);

					TCHAR bufText[256] = TEXT("");
					GetWindowText(hChild, bufText, 256);

					TCHAR bufOut[600] = TEXT("");
					_stprintf_s(bufOut, 600, TEXT("Class: %s\nText: %s\n"), bufClass, bufText);

					OutputDebugString(bufOut);

					if (_tcscmp(bufClass, WC_TREEVIEW) == 0)
					{
						HMODULE hUxtheme = LoadLibrary(TEXT("Uxtheme.dll"));

						if (hUxtheme)
						{
							PFN_SetWindowTheme SetWindowTheme = (PFN_SetWindowTheme)GetProcAddress(hUxtheme, "SetWindowTheme");

							if (SetWindowTheme)
							{
								SetWindowTheme(hChild, L"Explorer", NULL);
							}

							FreeLibrary(hUxtheme);
						}

						//TreeView_SetExtendedStyle(hChild, TVS_EX_FADEINOUTEXPANDOS, TVS_EX_FADEINOUTEXPANDOS);

						return FALSE; // stop enumeration
					}

					return TRUE;
					}, NULL);
			}

			return;
		}

		FreeLibrary(hLib);
	}

	MessageBox(hwnd, TEXT("Could not display the help contents. The Compiled HTML Help (CHM) help format is not supported on your operating system.\n\nNOTE: This message should not appear on Windows Vista+! If it does, please report at: http://github.com/fireblade211/regplus/issues/new/choose."),
		NULL, MB_ICONWARNING);
}