terminal/src/cascadia/TerminalSettingsModel/CascadiaSettingsSerialization.cpp
Mike Griese 20a722ce50
Fix crash on saving the settings twice (#10148)
## Summary of the Pull Request

Check for null before serializing the default terminal. Because the _currentDefaultTerminal is only initialized when the `Launch` page is navigated to, this _could_ be null if you navigate to another page, save, then save again. 


## PR Checklist
* [x] Closes #10003
* [x] I work here
* [n/a] Tests added/passed
* [n/a] Requires documentation to be updated

## Validation Steps Performed

It crashed consistently before, it doesn't now.
2021-05-21 16:38:52 +00:00

1370 lines
57 KiB
C++

// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.
#include "pch.h"
#include <argb.h>
#include "CascadiaSettings.h"
#include "../../types/inc/utils.hpp"
#include "Utils.h"
#include "JsonUtils.h"
#include <appmodel.h>
#include <shlobj.h>
#include <fmt/chrono.h>
#include "DefaultProfileUtils.h"
// defaults.h is a file containing the default json settings in a std::string_view
#include "defaults.h"
#include "defaults-universal.h"
// userDefault.h is like the above, but with a default template for the user's settings.json.
#include "userDefaults.h"
// Both defaults.h and userDefaults.h are generated at build time into the
// "Generated Files" directory.
using namespace winrt::Microsoft::Terminal::Settings::Model::implementation;
using namespace ::Microsoft::Console;
static constexpr std::wstring_view SettingsFilename{ L"settings.json" };
static constexpr std::wstring_view LegacySettingsFilename{ L"profiles.json" };
static constexpr std::wstring_view UnpackagedSettingsFolderName{ L"Microsoft\\Windows Terminal\\" };
static constexpr std::wstring_view DefaultsFilename{ L"defaults.json" };
static constexpr std::string_view SchemaKey{ "$schema" };
static constexpr std::string_view SchemaValue{ "https://aka.ms/terminal-profiles-schema" };
static constexpr std::string_view ProfilesKey{ "profiles" };
static constexpr std::string_view DefaultSettingsKey{ "defaults" };
static constexpr std::string_view ProfilesListKey{ "list" };
static constexpr std::string_view LegacyKeybindingsKey{ "keybindings" };
static constexpr std::string_view ActionsKey{ "actions" };
static constexpr std::string_view SchemesKey{ "schemes" };
static constexpr std::string_view NameKey{ "name" };
static constexpr std::string_view UpdatesKey{ "updates" };
static constexpr std::string_view GuidKey{ "guid" };
static constexpr std::string_view DisabledProfileSourcesKey{ "disabledProfileSources" };
static constexpr std::string_view Utf8Bom{ u8"\uFEFF" };
static constexpr std::string_view SettingsSchemaFragment{ "\n"
R"( "$schema": "https://aka.ms/terminal-profiles-schema")" };
static constexpr std::string_view jsonExtension{ ".json" };
static constexpr std::string_view FragmentsSubDirectory{ "\\Fragments" };
static constexpr std::wstring_view FragmentsPath{ L"\\Microsoft\\Windows Terminal\\Fragments" };
static constexpr std::string_view AppExtensionHostName{ "com.microsoft.windows.terminal.settings" };
// Function Description:
// - Extracting the value from an async task (like talking to the app catalog) when we are on the
// UI thread causes C++/WinRT to complain quite loudly (and halt execution!)
// This templated function extracts the result from a task with chicanery.
template<typename TTask>
static auto _extractValueFromTaskWithoutMainThreadAwait(TTask&& task) -> decltype(task.get())
{
using TVal = decltype(task.get());
std::optional<TVal> finalVal{};
std::condition_variable cv;
std::mutex mtx;
auto waitOnBackground = [&]() -> winrt::fire_and_forget {
co_await winrt::resume_background();
auto v{ co_await task };
std::unique_lock<std::mutex> lock{ mtx };
finalVal.emplace(std::move(v));
cv.notify_all();
};
std::unique_lock<std::mutex> lock{ mtx };
waitOnBackground();
cv.wait(lock, [&]() { return finalVal.has_value(); });
return *finalVal;
}
static std::tuple<size_t, size_t> _LineAndColumnFromPosition(const std::string_view string, ptrdiff_t position)
{
size_t line = 1, column = position + 1;
auto lastNL = string.find_last_of('\n', position);
if (lastNL != std::string::npos)
{
column = (position - lastNL);
line = std::count(string.cbegin(), string.cbegin() + lastNL + 1, '\n') + 1;
}
return { line, column };
}
static void _CatchRethrowSerializationExceptionWithLocationInfo(std::string_view settingsString)
{
std::string msg;
try
{
throw;
}
catch (const JsonUtils::DeserializationError& e)
{
static constexpr std::string_view basicHeader{ "* Line {line}, Column {column}\n{message}" };
static constexpr std::string_view keyedHeader{ "* Line {line}, Column {column} ({key})\n{message}" };
std::string jsonValueAsString{ "array or object" };
try
{
jsonValueAsString = e.jsonValue.asString();
if (e.jsonValue.isString())
{
jsonValueAsString = fmt::format("\"{}\"", jsonValueAsString);
}
}
catch (...)
{
// discard: we're in the middle of error handling
}
msg = fmt::format(" Have: {}\n Expected: {}", jsonValueAsString, e.expectedType);
auto [l, c] = _LineAndColumnFromPosition(settingsString, e.jsonValue.getOffsetStart());
msg = fmt::format((e.key ? keyedHeader : basicHeader),
fmt::arg("line", l),
fmt::arg("column", c),
fmt::arg("key", e.key.value_or("")),
fmt::arg("message", msg));
throw SettingsTypedDeserializationException{ msg };
}
}
// Method Description:
// - Creates a CascadiaSettings from whatever's saved on disk, or instantiates
// a new one with the default values. If we're running as a packaged app,
// it will load the settings from our packaged localappdata. If we're
// running as an unpackaged application, it will read it from the path
// we've set under localappdata.
// - Loads both the settings from the defaults.json and the user's settings.json
// - Also runs and dynamic profile generators. If any of those generators create
// new profiles, we'll write the user settings back to the file, with the new
// profiles inserted into their list of profiles.
// Return Value:
// - a unique_ptr containing a new CascadiaSettings object.
winrt::Microsoft::Terminal::Settings::Model::CascadiaSettings CascadiaSettings::LoadAll()
{
try
{
auto settings = LoadDefaults();
auto resultPtr = winrt::get_self<CascadiaSettings>(settings);
resultPtr->ClearWarnings();
// GH 3588, we need this below to know if the user chose something that wasn't our default.
// Collect it up here in case it gets modified by any of the other layers between now and when
// the user's preferences are loaded and layered.
const auto hardcodedDefaultGuid = resultPtr->GlobalSettings().DefaultProfile();
std::optional<std::string> fileData = _ReadUserSettings();
const bool foundFile = fileData.has_value();
// Make sure the file isn't totally empty. If it is, we'll treat the file
// like it doesn't exist at all.
const bool fileHasData = foundFile && !fileData.value().empty();
bool needToWriteFile = false;
if (fileHasData)
{
resultPtr->_ParseJsonString(fileData.value(), false);
}
// Load profiles from dynamic profile generators. _userSettings should be
// created by now, because we're going to check in there for any generators
// that should be disabled (if the user had any settings.)
resultPtr->_LoadDynamicProfiles();
try
{
resultPtr->_LoadFragmentExtensions();
}
CATCH_LOG();
if (!fileHasData)
{
// We didn't find the user settings. We'll need to create a file
// to use as the user defaults.
// For now, just parse our user settings template as their user settings.
auto userSettings{ resultPtr->_ApplyFirstRunChangesToSettingsTemplate(UserSettingsJson) };
resultPtr->_ParseJsonString(userSettings, false);
needToWriteFile = true;
}
try
{
// See microsoft/terminal#2325: find the defaultSettings from the user's
// settings. Layer those settings upon all the existing profiles we have
// (defaults and dynamic profiles). We'll also set
// _userDefaultProfileSettings here. When we LayerJson below to apply the
// user settings, we'll make sure to use these defaultSettings _before_ any
// profiles the user might have.
resultPtr->_ApplyDefaultsFromUserSettings();
// Apply the user's settings
resultPtr->LayerJson(resultPtr->_userSettings);
}
catch (...)
{
_CatchRethrowSerializationExceptionWithLocationInfo(resultPtr->_userSettingsString);
}
// After layering the user settings, check if there are any new profiles
// that need to be inserted into their user settings file.
needToWriteFile = resultPtr->_AppendDynamicProfilesToUserSettings() || needToWriteFile;
if (needToWriteFile)
{
// For safety's sake, we need to re-parse the JSON document to ensure that
// all future patches are applied with updated object offsets.
resultPtr->_ParseJsonString(resultPtr->_userSettingsString, false);
}
// Make sure there's a $schema at the top of the file.
needToWriteFile = resultPtr->_PrependSchemaDirective() || needToWriteFile;
// TODO:GH#2721 If powershell core is installed, we need to set that to the
// default profile, but only when the settings file was newly created. We'll
// re-write the segment of the user settings for "default profile" to have
// the powershell core GUID instead.
// If we created the file, or found new dynamic profiles, write the user
// settings string back to the file.
if (needToWriteFile)
{
// If AppendDynamicProfilesToUserSettings (or the pwsh check above)
// changed the file, then our local settings JSON is no longer accurate.
// We should re-parse, but not re-layer
resultPtr->_ParseJsonString(resultPtr->_userSettingsString, false);
try
{
_WriteSettings(resultPtr->_userSettingsString, CascadiaSettings::SettingsPath());
}
catch (...)
{
resultPtr->AppendWarning(SettingsLoadWarnings::FailedToWriteToSettings);
}
}
// If this throws, the app will catch it and use the default settings
resultPtr->_ValidateSettings();
return *resultPtr;
}
catch (const SettingsException& ex)
{
auto settings{ winrt::make_self<implementation::CascadiaSettings>() };
settings->_loadError = ex.Error();
return *settings;
}
catch (const SettingsTypedDeserializationException& e)
{
auto settings{ winrt::make_self<implementation::CascadiaSettings>() };
std::string_view what{ e.what() };
settings->_deserializationErrorMessage = til::u8u16(what);
return *settings;
}
}
// Function Description:
// - Loads a batch of settings curated for the Universal variant of the terminal app
// Arguments:
// - <none>
// Return Value:
// - a unique_ptr to a CascadiaSettings with the connection types and settings for Universal terminal
winrt::Microsoft::Terminal::Settings::Model::CascadiaSettings CascadiaSettings::LoadUniversal()
{
// We're going to do this ourselves because we want to exclude almost everything
// from the special Universal-for-developers configuration
try
{
// Create settings and get the universal defaults loaded up.
auto resultPtr = winrt::make_self<CascadiaSettings>();
resultPtr->_ParseJsonString(DefaultUniversalJson, true);
resultPtr->LayerJson(resultPtr->_defaultSettings);
// Now validate.
// If this throws, the app will catch it and use the default settings
resultPtr->_ValidateSettings();
return *resultPtr;
}
catch (const SettingsException& ex)
{
auto settings{ winrt::make_self<implementation::CascadiaSettings>() };
settings->_loadError = ex.Error();
return *settings;
}
catch (const SettingsTypedDeserializationException& e)
{
auto settings{ winrt::make_self<implementation::CascadiaSettings>() };
std::string_view what{ e.what() };
settings->_deserializationErrorMessage = til::u8u16(what);
return *settings;
}
}
// Function Description:
// - Creates a new CascadiaSettings object initialized with settings from the
// hardcoded defaults.json.
// Arguments:
// - <none>
// Return Value:
// - a unique_ptr to a CascadiaSettings with the settings from defaults.json
winrt::Microsoft::Terminal::Settings::Model::CascadiaSettings CascadiaSettings::LoadDefaults()
{
auto resultPtr{ winrt::make_self<CascadiaSettings>() };
// We already have the defaults in memory, because we stamp them into a
// header as part of the build process. We don't need to bother with reading
// them from a file (and the potential that could fail)
resultPtr->_ParseJsonString(DefaultJson, true);
resultPtr->LayerJson(resultPtr->_defaultSettings);
resultPtr->_ResolveDefaultProfile();
resultPtr->_UpdateActiveProfiles();
// tag these profiles as in-box
for (const auto& profile : resultPtr->AllProfiles())
{
const auto& profileImpl{ winrt::get_self<implementation::Profile>(profile) };
profileImpl->Origin(OriginTag::InBox);
}
return *resultPtr;
}
// Method Description:
// - Runs each of the configured dynamic profile generators (DPGs). Adds
// profiles from any DPGs that ran to the end of our list of profiles.
// - Uses the Json::Value _userSettings to check which DPGs should not be run.
// If the user settings has any namespaces in the "disabledProfileSources"
// property, we'll ensure that any DPGs with a matching namespace _don't_ run.
// Arguments:
// - <none>
// Return Value:
// - <none>
void CascadiaSettings::_LoadDynamicProfiles()
{
std::unordered_set<std::wstring> ignoredNamespaces;
const auto disabledProfileSources = CascadiaSettings::_GetDisabledProfileSourcesJsonObject(_userSettings);
if (disabledProfileSources.isArray())
{
for (const auto& json : disabledProfileSources)
{
ignoredNamespaces.emplace(JsonUtils::GetValue<std::wstring>(json));
}
}
const GUID nullGuid{ 0 };
for (auto& generator : _profileGenerators)
{
const std::wstring generatorNamespace{ generator->GetNamespace() };
if (ignoredNamespaces.find(generatorNamespace) != ignoredNamespaces.end())
{
// namespace should be ignored
}
else
{
try
{
auto profiles = generator->GenerateProfiles();
for (auto& profile : profiles)
{
profile.Source(generatorNamespace);
_allProfiles.Append(profile);
}
}
CATCH_LOG_MSG("Dynamic Profile Namespace: \"%ls\"", generatorNamespace.data());
}
}
}
// Method Description:
// - Searches the local app data folder, global app data folder and app
// extensions for json stubs we should use to create new profiles,
// modify existing profiles or add new color schemes
// - If the user settings has any namespaces in the "disabledProfileSources"
// property, we'll ensure that the corresponding folders do not get searched
void CascadiaSettings::_LoadFragmentExtensions()
{
// First, accumulate the namespaces the user wants to ignore
std::unordered_set<std::wstring> ignoredNamespaces;
const auto disabledProfileSources = CascadiaSettings::_GetDisabledProfileSourcesJsonObject(_userSettings);
if (disabledProfileSources.isArray())
{
for (const auto& json : disabledProfileSources)
{
ignoredNamespaces.emplace(JsonUtils::GetValue<std::wstring>(json));
}
}
// Search through the local app data folder
wil::unique_cotaskmem_string localAppDataFolder;
THROW_IF_FAILED(SHGetKnownFolderPath(FOLDERID_LocalAppData, 0, nullptr, &localAppDataFolder));
auto localAppDataFragments = std::wstring(localAppDataFolder.get()) + FragmentsPath.data();
if (std::filesystem::exists(localAppDataFragments))
{
_ApplyJsonStubsHelper(localAppDataFragments, ignoredNamespaces);
}
// Search through the program data folder
wil::unique_cotaskmem_string programDataFolder;
THROW_IF_FAILED(SHGetKnownFolderPath(FOLDERID_ProgramData, 0, nullptr, &programDataFolder));
auto programDataFragments = std::wstring(programDataFolder.get()) + FragmentsPath.data();
if (std::filesystem::exists(programDataFragments))
{
_ApplyJsonStubsHelper(programDataFragments, ignoredNamespaces);
}
// Search through app extensions
// Gets the catalog of extensions with the name "com.microsoft.windows.terminal.settings"
const auto catalog = Windows::ApplicationModel::AppExtensions::AppExtensionCatalog::Open(winrt::to_hstring(AppExtensionHostName));
auto extensions = _extractValueFromTaskWithoutMainThreadAwait(catalog.FindAllAsync());
for (const auto& ext : extensions)
{
// Only apply the stubs if the package name is not in ignored namespaces
if (ignoredNamespaces.find(ext.Package().Id().FamilyName().c_str()) == ignoredNamespaces.end())
{
// Likewise, getting the public folder from an extension is an async operation
// So we use another mutex and condition variable
auto foundFolder = _extractValueFromTaskWithoutMainThreadAwait(ext.GetPublicFolderAsync());
if (foundFolder)
{
// the StorageFolder class has its own methods for obtaining the files within the folder
// however, all those methods are Async methods
// you may have noticed that we need to resort to clunky implementations for async operations
// (they are in _extractValueFromTaskWithoutMainThreadAwait)
// so for now we will just take the folder path and access the files that way
auto path = winrt::to_string(foundFolder.Path());
path.append(FragmentsSubDirectory);
// If the directory exists, use the fragments in it
if (std::filesystem::exists(path))
{
const auto jsonFiles = _AccumulateJsonFilesInDirectory(til::u8u16(path));
// Provide the package name as the source
_ParseAndLayerFragmentFiles(jsonFiles, ext.Package().Id().FamilyName().c_str());
}
}
}
}
}
// Method Description:
// - Helper function to apply json stubs in the local app data folder and the global program data folder
// Arguments:
// - The directory to find json files in
// - The set of ignored namespaces
void CascadiaSettings::_ApplyJsonStubsHelper(const std::wstring_view directory, const std::unordered_set<std::wstring>& ignoredNamespaces)
{
// The json files should be within subdirectories where the subdirectory name is the app name
for (const auto& fragmentExtFolder : std::filesystem::directory_iterator(directory))
{
// We only want the parent folder name as the source (not the full path)
const auto source = fragmentExtFolder.path().filename().wstring();
// Only apply the stubs if the parent folder name is not in ignored namespaces
// (also make sure this is a directory for sanity)
if (std::filesystem::is_directory(fragmentExtFolder) && ignoredNamespaces.find(source) == ignoredNamespaces.end())
{
const auto jsonFiles = _AccumulateJsonFilesInDirectory(fragmentExtFolder.path().c_str());
_ParseAndLayerFragmentFiles(jsonFiles, winrt::hstring{ source });
}
}
}
// Method Description:
// - Finds all the json files within the given directory
// Arguments:
// - directory: the directory to search
// Return Value:
// - A set containing all the found file data
std::unordered_set<std::string> CascadiaSettings::_AccumulateJsonFilesInDirectory(const std::wstring_view directory)
{
std::unordered_set<std::string> jsonFiles;
for (const auto& fragmentExt : std::filesystem::directory_iterator(directory))
{
if (fragmentExt.path().extension() == jsonExtension)
{
wil::unique_hfile hFile{ CreateFileW(fragmentExt.path().c_str(),
GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE,
nullptr,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
nullptr) };
if (!hFile)
{
LOG_LAST_ERROR();
}
else
{
const auto fileData = _ReadFile(hFile.get()).value();
jsonFiles.emplace(fileData);
}
}
}
return jsonFiles;
}
// Method Description:
// - Given a set of json files, uses them to modify existing profiles,
// create new profiles, and create new color schemes
// Arguments:
// - files: the set of json files (each item in the set is the file data)
// - source: the location the files came from
void CascadiaSettings::_ParseAndLayerFragmentFiles(const std::unordered_set<std::string> files, const winrt::hstring source)
{
for (const auto& file : files)
{
// A file could have many new profiles/many profiles it wants to modify/many new color schemes
// so we first parse the entire file into one json object
auto fullFile = _ParseUtf8JsonString(file.data());
if (fullFile.isMember(JsonKey(ProfilesKey)))
{
// Now we separately get each stub that modifies/adds a profile
// We intentionally don't use a const reference here because we modify
// the profile stub by giving it a guid so we can call _FindMatchingProfile
for (auto& profileStub : fullFile[JsonKey(ProfilesKey)])
{
if (profileStub.isMember(JsonKey(UpdatesKey)))
{
// This stub is meant to be a modification to an existing profile,
// try to find the matching profile
profileStub[JsonKey(GuidKey)] = profileStub[JsonKey(UpdatesKey)];
auto matchingProfile = _FindMatchingProfile(profileStub);
if (matchingProfile)
{
// We found a matching profile, create a child of it and put the modifications there
// (we add a new inheritance layer)
auto childImpl{ matchingProfile->CreateChild() };
childImpl->LayerJson(profileStub);
childImpl->Origin(OriginTag::Fragment);
// replace parent in _profiles with child
_allProfiles.SetAt(_FindMatchingProfileIndex(matchingProfile->ToJson()).value(), *childImpl);
}
}
else
{
// This is a new profile, check that it meets our minimum requirements first
// (it must have at least a name)
if (profileStub.isMember(JsonKey(NameKey)))
{
auto newProfile = Profile::FromJson(profileStub);
// Make sure to give the new profile a source, then we add it to our list of profiles
// We don't make modifications to the user's settings file yet, that will happen when
// _AppendDynamicProfilesToUserSettings() is called later
newProfile->Source(source);
newProfile->Origin(OriginTag::Fragment);
_allProfiles.Append(*newProfile);
}
}
}
}
if (fullFile.isMember(JsonKey(SchemesKey)))
{
// Now we separately get each stub that adds a color scheme
for (const auto& schemeStub : fullFile[JsonKey(SchemesKey)])
{
if (_FindMatchingColorScheme(schemeStub))
{
// We do not allow modifications to existing color schemes
}
else
{
// This is a new color scheme, add it only if it specifies _all_ the fields
if (ColorScheme::ValidateColorScheme(schemeStub))
{
const auto newScheme = ColorScheme::FromJson(schemeStub);
_globals->AddColorScheme(*newScheme);
}
}
}
}
}
}
// Method Description:
// - Attempts to read the given data as a string of JSON and parse that JSON
// into a Json::Value.
// - Will ignore leading UTF-8 BOMs.
// - Additionally, will store the parsed JSON in this object, as either our
// _defaultSettings or our _userSettings, depending on isDefaultSettings.
// - Does _not_ apply the json onto our current settings. Callers should make
// sure to call LayerJson to ensure the settings are applied.
// Arguments:
// - fileData: the string to parse as JSON data
// - isDefaultSettings: if true, we should store the parsed JSON as our
// defaultSettings. Otherwise, we'll store the parsed JSON as our user
// settings.
// Return Value:
// - <none>
void CascadiaSettings::_ParseJsonString(std::string_view fileData, const bool isDefaultSettings)
{
// Parse the json data into either our defaults or user settings. We'll keep
// these original json values around for later, in case we need to parse
// their raw contents again.
Json::Value& root = isDefaultSettings ? _defaultSettings : _userSettings;
root = _ParseUtf8JsonString(fileData);
// If this is the user settings, also store away the original settings
// string. We'll need to keep it around so we can modify it without
// re-serializing their settings.
if (!isDefaultSettings)
{
_userSettingsString = fileData;
}
}
// Method Description:
// - Attempts to read the given data as a string of JSON and parse that JSON
// into a Json::Value
// - Will ignore leading UTF-8 BOMs
// Arguments:
// - fileData: the string to parse as JSON data
// Return value:
// - the parsed json value
Json::Value CascadiaSettings::_ParseUtf8JsonString(std::string_view fileData)
{
Json::Value result;
// Ignore UTF-8 BOM
auto actualDataStart = fileData.data();
const auto actualDataEnd = fileData.data() + fileData.size();
if (fileData.compare(0, Utf8Bom.size(), Utf8Bom) == 0)
{
actualDataStart += Utf8Bom.size();
}
std::string errs; // This string will receive any error text from failing to parse.
std::unique_ptr<Json::CharReader> reader{ Json::CharReaderBuilder::CharReaderBuilder().newCharReader() };
// `parse` will return false if it fails.
if (!reader->parse(actualDataStart, actualDataEnd, &result, &errs))
{
// This will be caught by App::_TryLoadSettings, who will display
// the text to the user.
throw winrt::hresult_error(WEB_E_INVALID_JSON_STRING, winrt::to_hstring(errs));
}
return result;
}
// Method Description:
// - Determines whether the user's settings file is missing a schema directive
// and, if so, inserts one.
// - Assumes that the body of the root object is at an indentation of 4 spaces, and
// therefore each member should be indented 4 spaces. If the user's settings
// have a different indentation, we'll still insert valid json, it'll just be
// indented incorrectly.
// Arguments:
// - <none>
// Return Value:
// - true iff we've made changes to the _userSettingsString that should be persisted.
bool CascadiaSettings::_PrependSchemaDirective()
{
if (_userSettings.isMember(JsonKey(SchemaKey)))
{
return false;
}
// start points at the opening { for the root object.
auto offset = _userSettings.getOffsetStart() + 1;
_userSettingsString.insert(offset, SettingsSchemaFragment);
offset += SettingsSchemaFragment.size();
if (_userSettings.size() > 0)
{
_userSettingsString.insert(offset, ",");
}
return true;
}
// Method Description:
// - Finds all the dynamic profiles we've generated that _don't_ exist in the
// user's settings. Generates a minimal blob of json for them, and inserts
// them into the user's settings at the end of the list of profiles.
// - Does not reformat the user's settings file.
// - Does not write the file! Only modifies in-place the _userSettingsString
// member. Callers should make sure to call
// _WriteSettings(_userSettingsString) to make sure to persist these changes!
// - Assumes that the `profiles` object is at an indentation of 4 spaces, and
// therefore each profile should be indented 8 spaces. If the user's settings
// have a different indentation, we'll still insert valid json, it'll just be
// indented incorrectly.
// Arguments:
// - <none>
// Return Value:
// - true iff we've made changes to the _userSettingsString that should be persisted.
bool CascadiaSettings::_AppendDynamicProfilesToUserSettings()
{
// - Find the set of profiles that weren't either in the default profiles or
// in the user profiles. TODO:GH#2723 Do this in not O(N^2)
// - For each of those profiles,
// * Diff them from the default profile
// * Serialize that diff
// * Insert that diff to the end of the list of profiles.
Json::StreamWriterBuilder wbuilder;
// Use 4 spaces to indent instead of \t
wbuilder.settings_["indentation"] = " ";
wbuilder.settings_["enableYAMLCompatibility"] = true; // suppress spaces around colons
auto isInJsonObj = [](const auto& profile, const auto& json) {
for (auto profileJson : _GetProfilesJsonObject(json))
{
if (profileJson.isObject())
{
const auto profileImpl = winrt::get_self<implementation::Profile>(profile);
if (profileImpl->ShouldBeLayered(profileJson))
{
return true;
}
// If the profileJson doesn't have a GUID, then it might be in
// the file still. We returned false because it shouldn't be
// layered, but it might be a name-only profile.
}
}
return false;
};
// Get the index in the user settings string of the _last_ profile.
// We want to start inserting profiles immediately following the last profile.
const auto userProfilesObj = _GetProfilesJsonObject(_userSettings);
const auto numProfiles = userProfilesObj.size();
const auto lastProfile = userProfilesObj[numProfiles - 1];
size_t currentInsertIndex = lastProfile.getOffsetLimit();
// Find the position of the first non-tab/space character before the last profile...
const auto lastProfileIndentStartsAt{ _userSettingsString.find_last_not_of(" \t", lastProfile.getOffsetStart() - 1) };
// ... and impute the user's preferred indentation.
// (we're taking a copy because a string_view into a string we mutate is a no-no.)
const std::string indentation{ _userSettingsString, lastProfileIndentStartsAt + 1, lastProfile.getOffsetStart() - lastProfileIndentStartsAt - 1 };
bool changedFile = false;
for (const auto& profile : _allProfiles)
{
// Skip profiles that are in the user settings or the default settings.
if (isInJsonObj(profile, _userSettings) || isInJsonObj(profile, _defaultSettings))
{
continue;
}
// Generate a diff for the profile, that contains the minimal set of
// changes to re-create this profile.
const auto profileImpl = winrt::get_self<implementation::Profile>(profile);
const auto diff = profileImpl->GenerateStub();
auto profileSerialization = Json::writeString(wbuilder, diff);
// Add the user's indent to the start of each line
profileSerialization.insert(0, indentation);
// Get the first newline
size_t pos = profileSerialization.find("\n");
// for each newline...
while (pos != std::string::npos)
{
// Insert 8 spaces immediately following the current newline
profileSerialization.insert(pos + 1, indentation);
// Get the next newline
pos = profileSerialization.find("\n", pos + indentation.size() + 1);
}
// Write a comma, newline to the file
changedFile = true;
_userSettingsString.insert(currentInsertIndex, ",");
currentInsertIndex++;
_userSettingsString.insert(currentInsertIndex, "\n");
currentInsertIndex++;
// Write the profile's serialization to the file
_userSettingsString.insert(currentInsertIndex, profileSerialization);
currentInsertIndex += profileSerialization.size();
}
return changedFile;
}
// Function Description:
// - Given a json serialization of a profile, this function will determine
// whether it is "well-formed". We introduced a bug (GH#9962, fixed in GH#9964)
// that would result in one or more nameless, guid-less profiles being emitted
// into the user's settings file. Those profiles would show up in the list as
// "Default" later.
static bool _IsValidProfileObject(const Json::Value& profileJson)
{
return profileJson.isMember(&*NameKey.cbegin(), (&*NameKey.cbegin()) + NameKey.size()) || // has a name (can generate a guid)
profileJson.isMember(&*GuidKey.cbegin(), (&*GuidKey.cbegin()) + GuidKey.size()); // or has a guid
}
// Method Description:
// - Create a new instance of this class from a serialized JsonObject.
// Arguments:
// - json: an object which should be a serialization of a CascadiaSettings object.
// Return Value:
// - a new CascadiaSettings instance created from the values in `json`
winrt::com_ptr<CascadiaSettings> CascadiaSettings::FromJson(const Json::Value& json)
{
auto resultPtr = winrt::make_self<CascadiaSettings>();
resultPtr->LayerJson(json);
return resultPtr;
}
// Method Description:
// - Layer values from the given json object on top of the existing properties
// of this object. For any keys we're expecting to be able to parse in the
// given object, we'll parse them and replace our settings with values from
// the new json object. Properties that _aren't_ in the json object will _not_
// be replaced.
// Arguments:
// - json: an object which should be a partial serialization of a CascadiaSettings object.
// Return Value:
// <none>
void CascadiaSettings::LayerJson(const Json::Value& json)
{
// add a new inheritance layer, and apply json values to child
_globals = _globals->CreateChild();
_globals->LayerJson(json);
if (auto schemes{ json[SchemesKey.data()] })
{
for (auto schemeJson : schemes)
{
if (schemeJson.isObject())
{
_LayerOrCreateColorScheme(schemeJson);
}
}
}
for (auto profileJson : _GetProfilesJsonObject(json))
{
if (profileJson.isObject() && _IsValidProfileObject(profileJson))
{
_LayerOrCreateProfile(profileJson);
}
}
}
// Method Description:
// - Given a partial json serialization of a Profile object, either layers that
// json on a matching Profile we already have, or creates a new Profile
// object from those settings.
// - For profiles that were created from a dynamic profile source, they'll have
// both a guid and source guid that must both match. If a user profile with a
// source set does not find a matching profile at load time, the profile
// should be ignored.
// Arguments:
// - json: an object which may be a partial serialization of a Profile object.
// Return Value:
// - <none>
void CascadiaSettings::_LayerOrCreateProfile(const Json::Value& profileJson)
{
// Layer the json on top of an existing profile, if we have one:
auto profileIndex{ _FindMatchingProfileIndex(profileJson) };
if (profileIndex)
{
auto parentProj{ _allProfiles.GetAt(*profileIndex) };
auto parent{ winrt::get_self<Profile>(parentProj) };
if (_userDefaultProfileSettings)
{
// We don't actually need to CreateChild() here.
// When we loaded Profile.Defaults, we created an empty child already.
// So this just populates the empty child
parent->LayerJson(profileJson);
}
else
{
// otherwise, add a new inheritance layer
auto childImpl{ parent->CreateChild() };
childImpl->LayerJson(profileJson);
// replace parent in _profiles with child
_allProfiles.SetAt(*profileIndex, *childImpl);
}
}
else
{
// If this JSON represents a dynamic profile, we _shouldn't_ create the
// profile here. We only want to create profiles for profiles without a
// `source`. Dynamic profiles _must_ be layered on an existing profile.
if (!Profile::IsDynamicProfileObject(profileJson))
{
auto profile{ winrt::make_self<Profile>() };
// GH#2325: If we have a set of default profile settings, set that as my parent.
// We _won't_ have these settings yet for defaults, dynamic profiles.
if (_userDefaultProfileSettings)
{
Profile::InsertParentHelper(profile, _userDefaultProfileSettings, 0);
}
profile->LayerJson(profileJson);
_allProfiles.Append(*profile);
}
}
}
// Method Description:
// - Finds a profile from our list of profiles that matches the given json
// object. Uses Profile::ShouldBeLayered to determine if the Json::Value is a
// match or not. This method should be used to find a profile to layer the
// given settings upon.
// - Returns nullptr if no such match exists.
// Arguments:
// - json: an object which may be a partial serialization of a Profile object.
// Return Value:
// - a Profile that can be layered with the given json object, iff such a
// profile exists.
winrt::com_ptr<Profile> CascadiaSettings::_FindMatchingProfile(const Json::Value& profileJson)
{
auto index{ _FindMatchingProfileIndex(profileJson) };
if (index)
{
auto profile{ _allProfiles.GetAt(*index) };
auto profileImpl{ winrt::get_self<Profile>(profile) };
return profileImpl->get_strong();
}
return nullptr;
}
// Method Description:
// - Finds a profile from our list of profiles that matches the given json
// object. Uses Profile::ShouldBeLayered to determine if the Json::Value is a
// match or not. This method should be used to find a profile to layer the
// given settings upon.
// - Returns nullopt if no such match exists.
// Arguments:
// - json: an object which may be a partial serialization of a Profile object.
// Return Value:
// - The index for the matching Profile, iff it exists. Otherwise, nullopt.
std::optional<uint32_t> CascadiaSettings::_FindMatchingProfileIndex(const Json::Value& profileJson)
{
for (uint32_t i = 0; i < _allProfiles.Size(); ++i)
{
const auto profile{ _allProfiles.GetAt(i) };
const auto profileImpl = winrt::get_self<Profile>(profile);
if (profileImpl->ShouldBeLayered(profileJson))
{
return i;
}
}
return std::nullopt;
}
// Method Description:
// - Finds the "default profile settings" if they exist in the users settings,
// and applies them to the existing profiles. The "default profile settings"
// are settings that should be applied to every profile a user has, with the
// option of being overridden by explicit values in the profile. This should
// be called _after_ the defaults have been parsed and dynamic profiles have
// been generated, but before the other user profiles have been loaded.
// Arguments:
// - <none>
// Return Value:
// - <none>
void CascadiaSettings::_ApplyDefaultsFromUserSettings()
{
// If `profiles` was an object, then look for the `defaults` object
// underneath it for the default profile settings.
// If there isn't one, we still want to add an empty "default" profile to the inheritance tree.
Json::Value defaultSettings{ Json::ValueType::objectValue };
if (const auto profiles{ _userSettings[JsonKey(ProfilesKey)] })
{
if (profiles.isObject() && !profiles[JsonKey(DefaultSettingsKey)].empty())
{
defaultSettings = profiles[JsonKey(DefaultSettingsKey)];
}
}
// Remove the `guid` member from the default settings. That'll
// hyper-explode, so just don't let them do that.
defaultSettings.removeMember({ "guid" });
_userDefaultProfileSettings = winrt::make_self<Profile>();
_userDefaultProfileSettings->LayerJson(defaultSettings);
_userDefaultProfileSettings->Origin(OriginTag::ProfilesDefaults);
const auto numOfProfiles{ _allProfiles.Size() };
for (uint32_t profileIndex = 0; profileIndex < numOfProfiles; ++profileIndex)
{
// create a child, so we inherit from the defaults.json layer
auto parentProj{ _allProfiles.GetAt(profileIndex) };
auto parentImpl{ winrt::get_self<Profile>(parentProj) };
auto childImpl{ parentImpl->CreateChild() };
// Add profile.defaults as the _first_ parent to the child
Profile::InsertParentHelper(childImpl, _userDefaultProfileSettings, 0);
// replace parent in _profiles with child
_allProfiles.SetAt(profileIndex, *childImpl);
}
}
// Method Description:
// - Given a partial json serialization of a ColorScheme object, either layers that
// json on a matching ColorScheme we already have, or creates a new ColorScheme
// object from those settings.
// Arguments:
// - json: an object which should be a partial serialization of a ColorScheme object.
// Return Value:
// - <none>
void CascadiaSettings::_LayerOrCreateColorScheme(const Json::Value& schemeJson)
{
// Layer the json on top of an existing profile, if we have one:
auto pScheme = _FindMatchingColorScheme(schemeJson);
if (pScheme)
{
pScheme->LayerJson(schemeJson);
}
else
{
const auto scheme = ColorScheme::FromJson(schemeJson);
_globals->AddColorScheme(*scheme);
}
}
// Method Description:
// - Finds a color scheme from our list of color schemes that matches the given
// json object. Uses ColorScheme::GetNameFromJson to find the name and then
// performs a lookup in the global map. This method should be used to find a
// color scheme to layer the given settings upon.
// - Returns nullptr if no such match exists.
// Arguments:
// - json: an object which should be a partial serialization of a ColorScheme object.
// Return Value:
// - a ColorScheme that can be layered with the given json object, iff such a
// color scheme exists.
winrt::com_ptr<ColorScheme> CascadiaSettings::_FindMatchingColorScheme(const Json::Value& schemeJson)
{
if (auto schemeName = ColorScheme::GetNameFromJson(schemeJson))
{
if (auto scheme{ _globals->ColorSchemes().TryLookup(*schemeName) })
{
return winrt::get_self<ColorScheme>(scheme)->get_strong();
}
}
return nullptr;
}
// Function Description:
// - Returns true if we're running in a packaged context.
// If we are, we want to change our settings path slightly.
// Arguments:
// - <none>
// Return Value:
// - true iff we're running in a packaged context.
bool CascadiaSettings::_IsPackaged()
{
UINT32 length = 0;
LONG rc = GetCurrentPackageFullName(&length, nullptr);
return rc != APPMODEL_ERROR_NO_PACKAGE;
}
// Method Description:
// - Writes the given content in UTF-8 to a settings file using the Win32 APIS's.
// Will overwrite any existing content in the file.
// Arguments:
// - content: the given string of content to write to the file.
// Return Value:
// - <none>
// This can throw an exception if we fail to open the file for writing, or we
// fail to write the file
void CascadiaSettings::_WriteSettings(const std::string_view content, const hstring filepath)
{
wil::unique_hfile hOut{ CreateFileW(filepath.c_str(),
GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
nullptr,
CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
nullptr) };
if (!hOut)
{
THROW_LAST_ERROR();
}
THROW_LAST_ERROR_IF(!WriteFile(hOut.get(), content.data(), gsl::narrow<DWORD>(content.size()), nullptr, nullptr));
}
// Method Description:
// - Reads the content in UTF-8 encoding of our settings file using the Win32 APIs
// Arguments:
// - <none>
// Return Value:
// - an optional with the content of the file if we were able to open it,
// otherwise the optional will be empty.
// If the file exists, but we fail to read it, this can throw an exception
// from reading the file
std::optional<std::string> CascadiaSettings::_ReadUserSettings()
{
const auto pathToSettingsFile{ CascadiaSettings::SettingsPath() };
wil::unique_hfile hFile{ CreateFileW(pathToSettingsFile.c_str(),
GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE,
nullptr,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
nullptr) };
if (!hFile)
{
// GH#5186 - We moved from profiles.json to settings.json; we want to
// migrate any file we find. We're using MoveFile in case their settings.json
// is a symbolic link.
std::filesystem::path pathToLegacySettingsFile{ std::wstring_view{ pathToSettingsFile } };
pathToLegacySettingsFile.replace_filename(LegacySettingsFilename);
wil::unique_hfile hLegacyFile{ CreateFileW(pathToLegacySettingsFile.c_str(),
GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE,
nullptr,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
nullptr) };
if (hLegacyFile)
{
// Close the file handle, move it, and re-open the file in its new location.
hLegacyFile.reset();
// Note: We're unsure if this is unsafe. Theoretically it's possible
// that two instances of the app will try and move the settings file
// simultaneously. We don't know what might happen in that scenario,
// but we're also not sure how to safely lock the file to prevent
// that from occurring.
THROW_LAST_ERROR_IF(!MoveFile(pathToLegacySettingsFile.c_str(),
pathToSettingsFile.c_str()));
hFile.reset(CreateFileW(pathToSettingsFile.c_str(),
GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE,
nullptr,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
nullptr));
// hFile shouldn't be INVALID. That's unexpected - We just moved the
// file, we should be able to open it. Throw the error so we can get
// some information here.
THROW_LAST_ERROR_IF(!hFile);
}
else
{
// If the roaming file didn't exist, and the local file doesn't exist,
// that's fine. Just log the error and return nullopt - we'll
// create the defaults.
LOG_LAST_ERROR();
return std::nullopt;
}
}
return _ReadFile(hFile.get());
}
// Method Description:
// - Reads the content in UTF-8 encoding of the given file using the Win32 APIs
// Arguments:
// - <none>
// Return Value:
// - an optional with the content of the file if we were able to read it. If we
// fail to read it, this can throw an exception from reading the file
std::optional<std::string> CascadiaSettings::_ReadFile(HANDLE hFile)
{
// fileSize is in bytes
const auto fileSize = GetFileSize(hFile, nullptr);
THROW_LAST_ERROR_IF(fileSize == INVALID_FILE_SIZE);
auto utf8buffer = std::make_unique<char[]>(fileSize);
DWORD bytesRead = 0;
THROW_LAST_ERROR_IF(!ReadFile(hFile, utf8buffer.get(), fileSize, &bytesRead, nullptr));
// convert buffer to UTF-8 string
std::string utf8string(utf8buffer.get(), fileSize);
return { utf8string };
}
// function Description:
// - Returns the full path to the settings file, either within the application
// package, or in its unpackaged location. This path is under the "Local
// AppData" folder, so it _doesn't_ roam to other machines.
// - If the application is unpackaged,
// the file will end up under e.g. C:\Users\admin\AppData\Local\Microsoft\Windows Terminal\settings.json
// Arguments:
// - <none>
// Return Value:
// - the full path to the settings file
winrt::hstring CascadiaSettings::SettingsPath()
{
wil::unique_cotaskmem_string localAppDataFolder;
// KF_FLAG_FORCE_APP_DATA_REDIRECTION, when engaged, causes SHGet... to return
// the new AppModel paths (Packages/xxx/RoamingState, etc.) for standard path requests.
// Using this flag allows us to avoid Windows.Storage.ApplicationData completely.
THROW_IF_FAILED(SHGetKnownFolderPath(FOLDERID_LocalAppData, KF_FLAG_FORCE_APP_DATA_REDIRECTION, nullptr, &localAppDataFolder));
std::filesystem::path parentDirectoryForSettingsFile{ localAppDataFolder.get() };
if (!_IsPackaged())
{
parentDirectoryForSettingsFile /= UnpackagedSettingsFolderName;
}
// Create the directory if it doesn't exist
std::filesystem::create_directories(parentDirectoryForSettingsFile);
return winrt::hstring{ (parentDirectoryForSettingsFile / SettingsFilename).wstring() };
}
winrt::hstring CascadiaSettings::DefaultSettingsPath()
{
// Both of these posts suggest getting the path to the exe, then removing
// the exe's name to get the package root:
// * https://blogs.msdn.microsoft.com/appconsult/2017/06/23/accessing-to-the-files-in-the-installation-folder-in-a-desktop-bridge-application/
// * https://blogs.msdn.microsoft.com/appconsult/2017/03/06/handling-data-in-a-converted-desktop-app-with-the-desktop-bridge/
//
// This would break if we ever moved our exe out of the package root.
// HOWEVER, if we try to look for a defaults.json that's simply in the same
// directory as the exe, that will work for unpackaged scenarios as well. So
// let's try that.
HMODULE hModule = GetModuleHandle(nullptr);
THROW_LAST_ERROR_IF(hModule == nullptr);
std::wstring exePathString;
THROW_IF_FAILED(wil::GetModuleFileNameW(hModule, exePathString));
const std::filesystem::path exePath{ exePathString };
const std::filesystem::path rootDir = exePath.parent_path();
return winrt::hstring{ (rootDir / DefaultsFilename).wstring() };
}
// Function Description:
// - Gets the object in the given JSON object under the "profiles" key. Returns
// null if there's no "profiles" key.
// Arguments:
// - json: the json object to get the profiles from.
// Return Value:
// - the Json::Value representing the profiles property from the given object
const Json::Value& CascadiaSettings::_GetProfilesJsonObject(const Json::Value& json)
{
const auto& profilesProperty = json[JsonKey(ProfilesKey)];
return profilesProperty.isArray() ?
profilesProperty :
profilesProperty[JsonKey(ProfilesListKey)];
}
// Function Description:
// - Gets the object in the given JSON object under the "disabledProfileSources"
// key. Returns null if there's no "disabledProfileSources" key.
// Arguments:
// - json: the json object to get the disabled profile sources from.
// Return Value:
// - the Json::Value representing the `disabledProfileSources` property from the
// given object
const Json::Value& CascadiaSettings::_GetDisabledProfileSourcesJsonObject(const Json::Value& json)
{
if (!json)
{
return Json::Value::nullSingleton();
}
return json[JsonKey(DisabledProfileSourcesKey)];
}
// Method Description:
// - Write the current state of CascadiaSettings to our settings file
// - Create a backup file with the current contents, if one does not exist
// - Persists the default terminal handler choice to the registry
// Arguments:
// - <none>
// Return Value:
// - <none>
void CascadiaSettings::WriteSettingsToDisk() const
{
const auto settingsPath{ CascadiaSettings::SettingsPath() };
try
{
// create a timestamped backup file
const auto clock{ std::chrono::system_clock() };
const auto timeStamp{ clock.to_time_t(clock.now()) };
const winrt::hstring backupSettingsPath{ fmt::format(L"{}.{:%Y-%m-%dT%H-%M-%S}.backup", settingsPath, fmt::localtime(timeStamp)) };
_WriteSettings(_userSettingsString, backupSettingsPath);
}
CATCH_LOG();
// write current settings to current settings file
Json::StreamWriterBuilder wbuilder;
wbuilder.settings_["indentation"] = " ";
wbuilder.settings_["enableYAMLCompatibility"] = true; // suppress spaces around colons
const auto styledString{ Json::writeString(wbuilder, ToJson()) };
_WriteSettings(styledString, settingsPath);
// Persists the default terminal choice
//
// GH#10003 - Only do this if _currentDefaultTerminal was actually
// initialized. It's only initialized when Launch.cpp calls
// `CascadiaSettings::RefreshDefaultTerminals`. We really don't need it
// otherwise.
if (_currentDefaultTerminal)
{
Model::DefaultTerminal::Current(_currentDefaultTerminal);
}
}
// Method Description:
// - Create a new serialized JsonObject from an instance of this class
// Arguments:
// - <none>
// Return Value:
// the JsonObject representing this instance
Json::Value CascadiaSettings::ToJson() const
{
// top-level json object
// directly inject "globals", "$schema", and "disabledProfileSources" into here
Json::Value json{ _globals->ToJson() };
JsonUtils::SetValueForKey(json, SchemaKey, JsonKey(SchemaValue));
if (_userSettings.isMember(JsonKey(DisabledProfileSourcesKey)))
{
json[JsonKey(DisabledProfileSourcesKey)] = _userSettings[JsonKey(DisabledProfileSourcesKey)];
}
// "profiles" will always be serialized as an object
Json::Value profiles{ Json::ValueType::objectValue };
profiles[JsonKey(DefaultSettingsKey)] = _userDefaultProfileSettings ? _userDefaultProfileSettings->ToJson() :
Json::ValueType::objectValue;
Json::Value profilesList{ Json::ValueType::arrayValue };
for (const auto& entry : _allProfiles)
{
const auto prof{ winrt::get_self<implementation::Profile>(entry) };
profilesList.append(prof->ToJson());
}
profiles[JsonKey(ProfilesListKey)] = profilesList;
json[JsonKey(ProfilesKey)] = profiles;
// TODO GH#8100:
// "schemes" will be an accumulation of _all_ the color schemes
// including all of the ones from defaults.json
Json::Value schemes{ Json::ValueType::arrayValue };
for (const auto& entry : _globals->ColorSchemes())
{
const auto scheme{ winrt::get_self<implementation::ColorScheme>(entry.Value()) };
schemes.append(scheme->ToJson());
}
json[JsonKey(SchemesKey)] = schemes;
return json;
}