UE4文件选择窗口的插件

// Copyright Epic Games, Inc. All Rights Reserved. #include "DesktopPlatformBase.h" #include "HAL/FileManager.h" #include "Misc/FileHelper.h" #include "Misc/Paths.h" #include "Misc/Guid.h" #include "Misc/ConfigCacheIni.h" #include "Misc/FeedbackContext.h" #include "Misc/App.h" #include "Misc/EngineVersion.h" #include "Serialization/JsonTypes.h" #include "Serialization/JsonReader.h" #include "Serialization/JsonSerializer.h" #include "Modules/ModuleManager.h" #include "DesktopPlatformPrivate.h" #include "Misc/OutputDeviceRedirector.h" #define LOCTEXT_NAMESPACE "DesktopPlatform" FDesktopPlatformBase::FDesktopPlatformBase() { LauncherInstallationTimestamp = FDateTime::MinValue(); } FString FDesktopPlatformBase::GetEngineDescription(const FString& Identifier) { // Official release versions just have a version number if(IsStockEngineRelease(Identifier)) { return Identifier; } // Otherwise get the path FString RootDir; if(!GetEngineRootDirFromIdentifier(Identifier, RootDir)) { return FString(); } // Convert it to a platform directory FString PlatformRootDir = RootDir; FPaths::MakePlatformFilename(PlatformRootDir); // Perforce build if (IsSourceDistribution(RootDir)) { return FString::Printf(TEXT("Source build at %s"), *PlatformRootDir); } else { return FString::Printf(TEXT("Binary build at %s"), *PlatformRootDir); } } FString FDesktopPlatformBase::GetCurrentEngineIdentifier() { if(CurrentEngineIdentifier.Len() == 0 && !GetEngineIdentifierFromRootDir(FPlatformMisc::RootDir(), CurrentEngineIdentifier)) { CurrentEngineIdentifier.Empty(); } return CurrentEngineIdentifier; } void FDesktopPlatformBase::EnumerateLauncherEngineInstallations(TMap<FString, FString> &OutInstallations) { // Cache the launcher install list if necessary ReadLauncherInstallationList(); // We've got a list of launcher installations. Filter it by the engine installations. for(TMap<FString, FString>::TConstIterator Iter(LauncherInstallationList); Iter; ++Iter) { FString AppName = Iter.Key(); if(AppName.RemoveFromStart(TEXT("UE_"), ESearchCase::CaseSensitive)) { OutInstallations.Add(AppName, Iter.Value()); } } } void FDesktopPlatformBase::EnumerateLauncherSampleInstallations(TArray<FString> &OutInstallations) { // Cache the launcher install list if necessary ReadLauncherInstallationList(); // We've got a list of launcher installations. Filter it by the engine installations. for(TMap<FString, FString>::TConstIterator Iter(LauncherInstallationList); Iter; ++Iter) { FString AppName = Iter.Key(); if(!AppName.StartsWith(TEXT("UE_"), ESearchCase::CaseSensitive)) { OutInstallations.Add(Iter.Value()); } } } void FDesktopPlatformBase::EnumerateLauncherSampleProjects(TArray<FString> &OutFileNames) { // Enumerate all the sample installation directories TArray<FString> LauncherSampleDirectories; EnumerateLauncherSampleInstallations(LauncherSampleDirectories); // Find all the project files within them for(int32 Idx = 0; Idx < LauncherSampleDirectories.Num(); Idx++) { TArray<FString> FileNames; IFileManager::Get().FindFiles(FileNames, *(LauncherSampleDirectories[Idx] / TEXT("*.uproject")), true, false); OutFileNames.Append(FileNames); } } bool FDesktopPlatformBase::GetEngineRootDirFromIdentifier(const FString &Identifier, FString &OutRootDir) { // Get all the installations TMap<FString, FString> Installations; EnumerateEngineInstallations(Installations); // Find the one with the right identifier for (TMap<FString, FString>::TConstIterator Iter(Installations); Iter; ++Iter) { if (Iter->Key == Identifier) { OutRootDir = Iter->Value; return true; } } return false; } bool FDesktopPlatformBase::GetEngineIdentifierFromRootDir(const FString &RootDir, FString &OutIdentifier) { // Get all the installations TMap<FString, FString> Installations; EnumerateEngineInstallations(Installations); // Normalize the root directory FString NormalizedRootDir = RootDir; FPaths::CollapseRelativeDirectories(NormalizedRootDir); FPaths::NormalizeDirectoryName(NormalizedRootDir); // Find the label for the given directory for (TMap<FString, FString>::TConstIterator Iter(Installations); Iter; ++Iter) { if (Iter->Value == NormalizedRootDir) { OutIdentifier = Iter->Key; return true; } } // Otherwise just try to add it return RegisterEngineInstallation(RootDir, OutIdentifier); } bool FDesktopPlatformBase::GetDefaultEngineIdentifier(FString &OutId) { TMap<FString, FString> Installations; EnumerateEngineInstallations(Installations); bool bRes = false; if (Installations.Num() > 0) { // Default to the first install TMap<FString, FString>::TConstIterator Iter(Installations); OutId = Iter.Key(); ++Iter; // Try to find the most preferred install for(; Iter; ++Iter) { if(IsPreferredEngineIdentifier(Iter.Key(), OutId)) { OutId = Iter.Key(); } } } return bRes; } bool FDesktopPlatformBase::GetDefaultEngineRootDir(FString &OutDirName) { FString Identifier; return GetDefaultEngineIdentifier(Identifier) && GetEngineRootDirFromIdentifier(Identifier, OutDirName); } bool FDesktopPlatformBase::IsPreferredEngineIdentifier(const FString &Identifier, const FString &OtherIdentifier) { int32 Version = ParseReleaseVersion(Identifier); int32 OtherVersion = ParseReleaseVersion(OtherIdentifier); if(Version != OtherVersion) { return Version > OtherVersion; } else { return Identifier > OtherIdentifier; } } bool FDesktopPlatformBase::TryGetEngineVersion(const FString& RootDir, FEngineVersion& OutVersion) { // Read the file to a string FString VersionText; if(FFileHelper::LoadFileToString(VersionText, *(RootDir / TEXT("Engine/Build/Build.version")))) { // Deserialize a JSON object from the string TSharedPtr< FJsonObject > Object; TSharedRef< TJsonReader<> > Reader = TJsonReaderFactory<>::Create(VersionText); if(FJsonSerializer::Deserialize(Reader, Object) && Object.IsValid()) { int32 MajorVersion = 0; int32 MinorVersion = 0; int32 PatchVersion = 0; if(Object->TryGetNumberField(TEXT("MajorVersion"), MajorVersion) && Object->TryGetNumberField(TEXT("MinorVersion"), MinorVersion) && Object->TryGetNumberField(TEXT("PatchVersion"), PatchVersion)) { int32 Changelist = 0; if(!Object->TryGetNumberField(TEXT("Changelist"), Changelist)) { Changelist = 0; } int32 IsLicenseeVersion = 0; if(!Object->TryGetNumberField(TEXT("IsLicenseeVersion"), IsLicenseeVersion)) { IsLicenseeVersion = 0; } FString BranchName; if(!Object->TryGetStringField(TEXT("BranchName"), BranchName)) { BranchName = FString(); } int EncodedChangelist = (IsLicenseeVersion == 0)? Changelist : FEngineVersionBase::EncodeLicenseeChangelist(Changelist); OutVersion = FEngineVersion(MajorVersion, MinorVersion, PatchVersion, EncodedChangelist, BranchName); return true; } } } // Try to read the version file FString VersionHeader; if(FFileHelper::LoadFileToString(VersionHeader, *(RootDir / TEXT("Engine/Source/Runtime/Launch/Resources/Version.h")))) { int32 MajorVersion = -1; int32 MinorVersion = -1; int32 PatchVersion = -1; int32 Changelist = 0; int32 IsLicenseeVersion = 0; FString BranchName; // Scan the file for version defines const TCHAR* TextPos = *VersionHeader; while(*TextPos) { // Skip over any newlines while(FChar::IsWhitespace(*TextPos)) { TextPos++; } // Buffer up a line of tokens TArray<FString> Tokens; while(*TextPos != '\n' && *TextPos != 0) { if(*TextPos == ' ' || *TextPos == '\t' || *TextPos == '\r') { // Skip over whitespace TextPos++; } else if(FC