Rebrand to Open-Shell (#36) (#58)

* Rebrand to Open-Shell

* Slight installer branding improvement

Src/Lib/DownloadHelper.h

@@ -0,0 +1,72 @@
+// Classic Shell (c) 2009-2017, Ivo Beltchev
+// Open-Shell (c) 2017-2018, The Open-Shell Team
+// Confidential information of Ivo Beltchev. Not for disclosure or distribution without prior written consent from the author
+
+#pragma once
+
+#include <vector>
+
+enum TVersionCheck
+{
+	CHECK_AUTO,
+	CHECK_AUTO_WAIT,
+	CHECK_UPDATE,
+};
+
+enum TSettingsComponent;
+
+struct LanguageVersionData
+{
+	CString language;
+	CString url;
+	DWORD version;
+	DWORD build;
+	DWORD hash;
+	bool bBasic;
+	WORD languageId;
+	HBITMAP bitmap;
+
+	LanguageVersionData( void ) { bBasic=false; bitmap=NULL; }
+};
+
+struct VersionData
+{
+	bool bValid;
+	DWORD newVersion;
+	DWORD encodedLangVersion;
+	CString downloadUrl;
+	CString downloadSigner;
+	CString news;
+	CString updateLink;
+	CString languageLink;
+	CString altUrl;
+	bool bNewVersion;
+	bool bIgnoreVersion;
+	bool bNewLanguage;
+	bool bIgnoreLanguage;
+	CString newLanguage;
+	std::vector<LanguageVersionData> languages;
+
+	~VersionData( void ) { Clear(); }
+	void Clear( void );
+	void Swap( VersionData &data );
+
+	enum TLoadResult
+	{
+		LOAD_OK,
+		LOAD_ERROR, // the file is missing some data
+		LOAD_BAD_VERSION, // the version is wrong
+		LOAD_BAD_FILE, // the file is corrupted
+	};
+
+	TLoadResult Load( const wchar_t *fname, bool bLoadFlags );
+private:
+	void operator=( const VersionData& );
+};
+
+typedef void (*tNewVersionCallback)( VersionData &data );
+
+// 0 - fail, 1 - success, 2 - cancel
+DWORD CheckForNewVersion( HWND owner, TSettingsComponent component, TVersionCheck check, tNewVersionCallback callback );
+DWORD DownloadLanguageDll( HWND owner, TSettingsComponent component, const LanguageVersionData &data, CString &error );
+DWORD DownloadNewVersion( HWND owner, TSettingsComponent component, const wchar_t *url, const wchar_t *signer, CString &fname, CString &error );