improvement: internal command line: edit:file: view:file: take into a…

…ccount the presence of special character `~` (Home directory)

This makes it possible to run commands such as edit:~/.bashrc

far2l/src/cmdline.cpp

@@ -912,6 +912,14 @@ bool CommandLine::ProcessFarCommands(const wchar_t *CmdLine)
 	bool b_far, b_edit = false, b_view = false;
 	std::string::size_type p;
 	std::wstring str_command(CmdLine);
+	auto expandString = [](const std::wstring &Filename) -> std::wstring {
+		std::wstring result = Filename;
+		if ((result.length() >= 2) && (result[0] == '~') && (result[1] == '/')) {
+			const auto &strHome = CachedHomeDir();
+			result.replace(result.begin(), result.begin() + 1, strHome.CPtr());
+		}
+		return result;
+	};
 
 	StrTrim(str_command);
 
@@ -953,10 +961,12 @@ bool CommandLine::ProcessFarCommands(const wchar_t *CmdLine)
 						CP_AUTODETECT, FFILEEDIT_ENABLEF6 | FFILEEDIT_DISABLEHISTORY);
 				}
 			}
-			else // filename
+			else { // filename
+				const std::wstring filename = expandString(str_command.substr(p,std::string::npos));
 				new FileEditor(
-					std::make_shared<FileHolder>( str_command.substr(p,std::string::npos).c_str() ),
+					std::make_shared<FileHolder>( filename.c_str() ),
 					CP_AUTODETECT, FFILEEDIT_CANNEWFILE | FFILEEDIT_ENABLEF6);
+			}
 		}
 		else // new empty file
 			new FileEditor(
@@ -980,9 +990,11 @@ bool CommandLine::ProcessFarCommands(const wchar_t *CmdLine)
 					TRUE/*EnableSwitch*/, TRUE/*DisableHistory*/, FALSE/*DisableEdit*/);
 				}
 			}
-			else // filename
-				new FileViewer(std::make_shared<FileHolder>( str_command.substr(p,std::string::npos).c_str() ),
+			else { // filename
+				const std::wstring filename = expandString(str_command.substr(p,std::string::npos));
+				new FileViewer(std::make_shared<FileHolder>( filename.c_str() ),
 					TRUE/*EnableSwitch*/, FALSE/*DisableHistory*/, FALSE/*DisableEdit*/);
+			}
 		}
 		return true; // anyway prefix correct and was processed
 	}