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LibLine: Unify history reading, prefer File over DeprecatedFile

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This commit is contained in:
Ben Wiederhake 2023-05-19 18:10:15 +02:00 • committed by Jelle Raaijmakers
parent 64a2a63df6
commit f93ee3142d
2 changed files with 37 additions and 28 deletions
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64
Userland/Libraries/LibLine/Editor.cpp
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@ -18,7 +18,6 @@
#include <AK/Utf32View.h>
#include <AK/Utf8View.h>
#include <LibCore/ConfigFile.h>
#include <LibCore/DeprecatedFile.h>
#include <LibCore/Event.h>
#include <LibCore/EventLoop.h>
#include <LibCore/Notifier.h>
@ -249,26 +248,33 @@ void Editor::add_to_history(DeprecatedString const& line)
m_history_dirty = true;
}
bool Editor::load_history(DeprecatedString const& path)
ErrorOr<Vector<Editor::HistoryEntry>> Editor::try_load_history(StringView path)
{
auto history_file_or_error = Core::File::open(path, Core::File::OpenMode::Read);
if (history_file_or_error.is_error())
return false;
auto data_or_error = history_file_or_error.value()->read_until_eof();
if (data_or_error.is_error())
return false;
auto hist = StringView { data_or_error.value() };
auto history_file = TRY(Core::File::open(path, Core::File::OpenMode::Read));
auto data = TRY(history_file->read_until_eof());
auto hist = StringView { data };
Vector<HistoryEntry> history;
for (auto& str : hist.split_view("\n\n"sv)) {
auto it = str.find("::"sv).value_or(0);
auto time = str.substring_view(0, it).to_int<time_t>().value_or(0);
auto string = str.substring_view(it == 0 ? it : it + 2);
m_history.append({ string, time });
history.append({ string, time });
}
return true;
return history;
}
template<typename It0, typename It1, typename OutputT, typename MapperT, typename LessThan>
static void merge(It0&& begin0, It0 const& end0, It1&& begin1, It1 const& end1, OutputT& output, MapperT left_mapper, LessThan less_than)
bool Editor::load_history(DeprecatedString const& path)
{
auto history_or_error = try_load_history(path);
if (history_or_error.is_error())
return false;
auto maybe_error = m_history.try_extend(history_or_error.release_value());
auto okay = !maybe_error.is_error();
return okay;
}
template<typename It0, typename It1, typename OutputT, typename LessThan>
static void merge(It0&& begin0, It0 const& end0, It1&& begin1, It1 const& end1, OutputT& output, LessThan less_than)
{
for (;;) {
if (begin0 == end0 && begin1 == end1)
@ -282,7 +288,7 @@ static void merge(It0&& begin0, It0 const& end0, It1&& begin1, It1 const& end1,
continue;
}
auto&& left = left_mapper(*begin0);
auto&& left = *begin0;
if (left.entry.is_whitespace()) {
++begin0;
continue;
@ -311,30 +317,32 @@ static void merge(It0&& begin0, It0 const& end0, It1&& begin1, It1 const& end1,
bool Editor::save_history(DeprecatedString const& path)
{
// Note: Use a dummy entry to simplify merging.
Vector<HistoryEntry> final_history { { "", 0 } };
{
auto file_or_error = Core::DeprecatedFile::open(path, Core::OpenMode::ReadWrite, 0600);
if (file_or_error.is_error())
auto history_or_error = try_load_history(path);
if (history_or_error.is_error())
return false;
auto file = file_or_error.release_value();
Vector<HistoryEntry> old_history = history_or_error.release_value();
merge(
file->line_begin(), file->line_end(), m_history.begin(), m_history.end(), final_history,
[](StringView str) {
auto it = str.find("::"sv).value_or(0);
auto time = str.substring_view(0, it).to_int<time_t>().value_or(0);
auto string = str.substring_view(it == 0 ? it : it + 2);
return HistoryEntry { string, time };
},
old_history.begin(), old_history.end(),
m_history.begin(), m_history.end(),
final_history,
[](HistoryEntry const& left, HistoryEntry const& right) { return left.timestamp < right.timestamp; });
}
auto file_or_error = Core::DeprecatedFile::open(path, Core::OpenMode::WriteOnly, 0600);
auto file_or_error = Core::File::open(path, Core::File::OpenMode::Write, 0600);
if (file_or_error.is_error())
return false;
auto file = file_or_error.release_value();
final_history.take_first();
for (auto const& entry : final_history)
file->write(DeprecatedString::formatted("{}::{}\n\n", entry.timestamp, entry.entry));
// Skip the dummy entry:
for (auto iter = final_history.begin() + 1; iter != final_history.end(); ++iter) {
auto const& entry = *iter;
auto buffer = DeprecatedString::formatted("{}::{}\n\n", entry.timestamp, entry.entry);
auto maybe_error = file->write_until_depleted(buffer.bytes());
if (maybe_error.is_error())
return false;
}
m_history_dirty = false;
return true;