forked from mia/Aegisub
137 lines
3.8 KiB
C++
137 lines
3.8 KiB
C++
// Copyright (c) 2010, Amar Takhar <verm@aegisub.org>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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/// @file mru.cpp
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/// @brief Most Recently Used (MRU) Lists
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/// @ingroup libaegisub
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#include "../config.h"
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#include "libaegisub/mru.h"
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#include "libaegisub/cajun/writer.h"
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#include "libaegisub/io.h"
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#include "libaegisub/json.h"
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#include "libaegisub/log.h"
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#include "libaegisub/option.h"
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#include "libaegisub/option_value.h"
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#include <fstream>
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namespace agi {
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MRUManager::MRUManager(agi::fs::path const& config, std::string const& default_config, agi::Options *options)
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: config_name(config)
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, options(options)
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{
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option_names["Audio"] = "Limits/MRU";
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option_names["Keyframes"] = "Limits/MRU";
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option_names["Subtitle"] = "Limits/MRU";
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option_names["Timecodes"] = "Limits/MRU";
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option_names["Video"] = "Limits/MRU";
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option_names["Find"] = "Limits/Find Replace";
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option_names["Replace"] = "Limits/Find Replace";
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LOG_D("agi/mru") << "Loading MRU List";
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json::Object root(json_util::file(config, default_config));
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for (auto const& it : root)
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Load(it.first, it.second);
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}
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MRUManager::~MRUManager() {
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}
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MRUManager::MRUListMap &MRUManager::Find(std::string const& key) {
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auto index = mru.find(key);
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if (index == mru.end())
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throw MRUErrorInvalidKey("Invalid key value");
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return index->second;
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}
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void MRUManager::Add(std::string const& key, agi::fs::path const& entry) {
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MRUListMap &map = Find(key);
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auto it = find(begin(map), end(map), entry);
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if (it == begin(map) && it != end(map))
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return;
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if (it != end(map))
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map.splice(begin(map), map, it);
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else {
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map.push_front(entry);
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Prune(key, map);
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}
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Flush();
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}
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void MRUManager::Remove(std::string const& key, agi::fs::path const& entry) {
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Find(key).remove(entry);
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Flush();
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}
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const MRUManager::MRUListMap* MRUManager::Get(std::string const& key) {
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return &Find(key);
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}
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agi::fs::path const& MRUManager::GetEntry(std::string const& key, const size_t entry) {
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const MRUManager::MRUListMap *const map = Get(key);
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if (entry >= map->size())
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throw MRUErrorIndexOutOfRange("Requested element index is out of range.");
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return *next(map->begin(), entry);
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}
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void MRUManager::Flush() {
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json::Object out;
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for (auto const& mru_map : mru) {
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json::Array &array = out[mru_map.first];
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transform(begin(mru_map.second), end(mru_map.second),
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back_inserter(array), [](agi::fs::path const& p) { return p.string(); });
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}
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json::Writer::Write(out, io::Save(config_name).Get());
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}
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/// @brief Prune MRUListMap to the desired length.
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/// This uses the user-set values for MRU list length.
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void MRUManager::Prune(std::string const& key, MRUListMap& map) const {
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size_t limit = 16u;
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if (options) {
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auto it = option_names.find(key);
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if (it != option_names.end())
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limit = (size_t)options->Get(it->second)->GetInt();
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}
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map.resize(std::min(limit, map.size()));
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}
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/// @brief Load MRU Lists.
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/// @param key List name.
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/// @param array json::Array of values.
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void MRUManager::Load(std::string const& key, const json::Array& array) {
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try {
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transform(begin(array), end(array),
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back_inserter(mru[key]), [](std::string const& s) { return s; });
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}
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catch (json::Exception const&) {
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// Out of date MRU file; just discard the data and skip it
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}
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Prune(key, mru[key]);
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}
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}
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