tdesktop/Telegram/SourceFiles/info/downloads/info_downloads_provider.cpp

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/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.
For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
#include "info/downloads/info_downloads_provider.h"
#include "info/media/info_media_widget.h"
#include "info/media/info_media_list_section.h"
#include "info/info_controller.h"
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#include "ui/text/format_song_document_name.h"
#include "data/data_download_manager.h"
#include "data/data_document.h"
#include "data/data_media_types.h"
#include "data/data_session.h"
#include "main/main_session.h"
#include "main/main_account.h"
#include "history/history_item.h"
#include "history/history.h"
#include "core/application.h"
#include "storage/storage_shared_media.h"
#include "layout/layout_selection.h"
namespace Info::Downloads {
namespace {
using namespace Media;
} // namespace
Provider::Provider(not_null<AbstractController*> controller)
: _controller(controller) {
style::PaletteChanged(
) | rpl::start_with_next([=] {
for (auto &layout : _layouts) {
layout.second.item->invalidateCache();
}
}, _lifetime);
}
Type Provider::type() {
return Type::File;
}
bool Provider::hasSelectRestriction() {
return false;
}
rpl::producer<bool> Provider::hasSelectRestrictionChanges() {
return rpl::never<bool>();
}
bool Provider::sectionHasFloatingHeader() {
return false;
}
QString Provider::sectionTitle(not_null<const BaseLayout*> item) {
return QString();
}
bool Provider::sectionItemBelongsHere(
not_null<const BaseLayout*> item,
not_null<const BaseLayout*> previous) {
return true;
}
bool Provider::isPossiblyMyItem(not_null<const HistoryItem*> item) {
return true;
}
std::optional<int> Provider::fullCount() {
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return _queryWords.empty()
? _fullCount
: (_foundCount || _fullCount.has_value())
? _foundCount
: std::optional<int>();
}
void Provider::restart() {
}
void Provider::checkPreload(
QSize viewport,
not_null<BaseLayout*> topLayout,
not_null<BaseLayout*> bottomLayout,
bool preloadTop,
bool preloadBottom) {
}
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void Provider::setSearchQuery(QString query) {
if (_query == query) {
return;
}
_query = query;
auto words = TextUtilities::PrepareSearchWords(_query);
if (!_started || _queryWords == words) {
return;
}
_queryWords = std::move(words);
if (searchMode()) {
_foundCount = 0;
for (auto &element : _elements) {
if ((element.found = computeIsFound(element))) {
++_foundCount;
}
}
}
_refreshed.fire({});
}
void Provider::refreshViewer() {
if (_started) {
return;
}
_started = true;
auto &manager = Core::App().downloadManager();
rpl::single(rpl::empty) | rpl::then(
manager.loadingListChanges() | rpl::to_empty
) | rpl::start_with_next([=, &manager] {
auto copy = _downloading;
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for (const auto id : manager.loadingList()) {
if (!id->done) {
const auto item = id->object.item;
if (!copy.remove(item) && !_downloaded.contains(item)) {
_downloading.emplace(item);
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addElementNow({
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.item = item,
.started = id->started,
.path = id->path,
});
trackItemSession(item);
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refreshPostponed(true);
}
}
}
for (const auto &item : copy) {
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Assert(!_downloaded.contains(item));
remove(item);
}
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if (!_fullCount.has_value()) {
refreshPostponed(false);
}
}, _lifetime);
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for (const auto id : manager.loadedList()) {
addPostponed(id);
}
manager.loadedAdded(
) | rpl::start_with_next([=](not_null<const Data::DownloadedId*> entry) {
addPostponed(entry);
}, _lifetime);
manager.loadedRemoved(
) | rpl::start_with_next([=](not_null<const HistoryItem*> item) {
if (!_downloading.contains(item)) {
remove(item);
} else {
_downloaded.remove(item);
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_addPostponed.erase(
ranges::remove(_addPostponed, item, &Element::item),
end(_addPostponed));
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}
}, _lifetime);
manager.loadedResolveDone(
) | rpl::start_with_next([=] {
if (!_fullCount.has_value()) {
_fullCount = 0;
}
}, _lifetime);
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performAdd();
performRefresh();
}
void Provider::addPostponed(not_null<const Data::DownloadedId*> entry) {
Expects(entry->object != nullptr);
const auto item = entry->object->item;
trackItemSession(item);
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const auto i = ranges::find(_addPostponed, item, &Element::item);
if (i != end(_addPostponed)) {
i->path = entry->path;
i->started = entry->started;
} else {
_addPostponed.push_back({
.item = item,
.started = entry->started,
.path = entry->path,
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});
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if (_addPostponed.size() == 1) {
Ui::PostponeCall(this, [=] {
performAdd();
});
}
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}
}
void Provider::performAdd() {
if (_addPostponed.empty()) {
return;
}
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for (auto &element : base::take(_addPostponed)) {
_downloaded.emplace(element.item);
if (!_downloading.remove(element.item)) {
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addElementNow(std::move(element));
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}
}
refreshPostponed(true);
}
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void Provider::addElementNow(Element &&element) {
_elements.push_back(std::move(element));
auto &added = _elements.back();
fillSearchIndex(added);
added.found = searchMode() && computeIsFound(added);
if (added.found) {
++_foundCount;
}
}
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void Provider::remove(not_null<const HistoryItem*> item) {
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_addPostponed.erase(
ranges::remove(_addPostponed, item, &Element::item),
end(_addPostponed));
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_downloading.remove(item);
_downloaded.remove(item);
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const auto proj = [&](const Element &element) {
if (element.item != item) {
return false;
} else if (element.found && searchMode()) {
--_foundCount;
}
return true;
};
_elements.erase(ranges::remove_if(_elements, proj), end(_elements));
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if (const auto i = _layouts.find(item); i != end(_layouts)) {
_layoutRemoved.fire(i->second.item.get());
_layouts.erase(i);
}
refreshPostponed(false);
}
void Provider::refreshPostponed(bool added) {
if (added) {
_postponedRefreshSort = true;
}
if (!_postponedRefresh) {
_postponedRefresh = true;
Ui::PostponeCall(this, [=] {
performRefresh();
});
}
}
void Provider::performRefresh() {
if (!_postponedRefresh) {
return;
}
_postponedRefresh = false;
if (!_elements.empty() || _fullCount.has_value()) {
_fullCount = _elements.size();
}
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if (base::take(_postponedRefreshSort)) {
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ranges::sort(_elements, ranges::less(), &Element::started);
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}
_refreshed.fire({});
}
void Provider::trackItemSession(not_null<const HistoryItem*> item) {
const auto session = &item->history()->session();
if (_trackedSessions.contains(session)) {
return;
}
auto &lifetime = _trackedSessions.emplace(session).first->second;
session->data().itemRemoved(
) | rpl::start_with_next([this](auto item) {
itemRemoved(item);
}, lifetime);
session->account().sessionChanges(
) | rpl::take(1) | rpl::start_with_next([=] {
_trackedSessions.remove(session);
}, lifetime);
}
rpl::producer<> Provider::refreshed() {
return _refreshed.events();
}
std::vector<ListSection> Provider::fillSections(
not_null<Overview::Layout::Delegate*> delegate) {
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const auto search = searchMode();
if (!search) {
markLayoutsStale();
}
const auto guard = gsl::finally([&] { clearStaleLayouts(); });
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if (_elements.empty() || (search && !_foundCount)) {
return {};
}
auto result = std::vector<ListSection>();
result.emplace_back(Type::File, sectionDelegate());
auto &section = result.back();
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for (const auto &element : ranges::views::reverse(_elements)) {
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if (search && !element.found) {
continue;
} else if (auto layout = getLayout(element, delegate)) {
section.addItem(layout);
}
}
section.finishSection();
return result;
}
void Provider::markLayoutsStale() {
for (auto &layout : _layouts) {
layout.second.stale = true;
}
}
void Provider::clearStaleLayouts() {
for (auto i = _layouts.begin(); i != _layouts.end();) {
if (i->second.stale) {
_layoutRemoved.fire(i->second.item.get());
i = _layouts.erase(i);
} else {
++i;
}
}
}
rpl::producer<not_null<BaseLayout*>> Provider::layoutRemoved() {
return _layoutRemoved.events();
}
BaseLayout *Provider::lookupLayout(const HistoryItem *item) {
return nullptr;
}
bool Provider::isMyItem(not_null<const HistoryItem*> item) {
return _downloading.contains(item) || _downloaded.contains(item);
}
bool Provider::isAfter(
not_null<const HistoryItem*> a,
not_null<const HistoryItem*> b) {
if (a != b) {
for (const auto &element : _elements) {
if (element.item == a) {
return false;
} else if (element.item == b) {
return true;
}
}
}
return false;
}
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bool Provider::searchMode() const {
return !_queryWords.empty();
}
void Provider::fillSearchIndex(Element &element) {
auto strings = QStringList(QFileInfo(element.path).fileName());
if (const auto media = element.item->media()) {
if (const auto document = media->document()) {
strings.append(document->filename());
strings.append(Ui::Text::FormatDownloadsName(document).text);
}
}
element.words = TextUtilities::PrepareSearchWords(strings.join(' '));
element.letters.clear();
for (const auto &word : element.words) {
element.letters.emplace(word.front());
}
}
bool Provider::computeIsFound(const Element &element) const {
Expects(!_queryWords.empty());
const auto has = [&](const QString &queryWord) {
if (!element.letters.contains(queryWord.front())) {
return false;
}
for (const auto &word : element.words) {
if (word.startsWith(queryWord)) {
return true;
}
}
return false;
};
for (const auto &queryWord : _queryWords) {
if (!has(queryWord)) {
return false;
}
}
return true;
}
void Provider::itemRemoved(not_null<const HistoryItem*> item) {
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remove(item);
}
BaseLayout *Provider::getLayout(
Element element,
not_null<Overview::Layout::Delegate*> delegate) {
auto it = _layouts.find(element.item);
if (it == _layouts.end()) {
if (auto layout = createLayout(element, delegate)) {
layout->initDimensions();
it = _layouts.emplace(element.item, std::move(layout)).first;
} else {
return nullptr;
}
}
it->second.stale = false;
return it->second.item.get();
}
std::unique_ptr<BaseLayout> Provider::createLayout(
Element element,
not_null<Overview::Layout::Delegate*> delegate) {
const auto getFile = [&]() -> DocumentData* {
if (auto media = element.item->media()) {
return media->document();
}
return nullptr;
};
using namespace Overview::Layout;
auto &songSt = st::overviewFileLayout;
if (const auto file = getFile()) {
return std::make_unique<Document>(
delegate,
element.item,
DocumentFields{
.document = file,
.dateOverride = Data::DateFromDownloadDate(element.started),
.forceFileLayout = true,
},
songSt);
}
return nullptr;
}
ListItemSelectionData Provider::computeSelectionData(
not_null<const HistoryItem*> item,
TextSelection selection) {
auto result = ListItemSelectionData(selection);
result.canDelete = true;
result.canForward = item->allowsForward()
&& (&item->history()->session() == &_controller->session());
return result;
}
void Provider::applyDragSelection(
ListSelectedMap &selected,
not_null<const HistoryItem*> fromItem,
bool skipFrom,
not_null<const HistoryItem*> tillItem,
bool skipTill) {
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auto from = ranges::find(_elements, fromItem, &Element::item);
auto till = ranges::find(_elements, tillItem, &Element::item);
if (from == end(_elements) || till == end(_elements)) {
return;
}
if (skipFrom) {
++from;
}
if (!skipTill) {
++till;
}
if (from >= till) {
selected.clear();
return;
}
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const auto search = !_queryWords.isEmpty();
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auto chosen = base::flat_set<not_null<const HistoryItem*>>();
chosen.reserve(till - from);
for (auto i = from; i != till; ++i) {
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if (search && !i->found) {
continue;
}
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const auto item = i->item;
chosen.emplace(item);
ChangeItemSelection(
selected,
item,
computeSelectionData(item, FullSelection));
}
if (selected.size() != chosen.size()) {
for (auto i = begin(selected); i != end(selected);) {
if (selected.contains(i->first)) {
++i;
} else {
i = selected.erase(i);
}
}
}
}
bool Provider::allowSaveFileAs(
not_null<const HistoryItem*> item,
not_null<DocumentData*> document) {
return false;
}
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QString Provider::showInFolderPath(
not_null<const HistoryItem*> item,
not_null<DocumentData*> document) {
const auto i = ranges::find(_elements, item, &Element::item);
return (i != end(_elements)) ? i->path : QString();
}
int64 Provider::scrollTopStatePosition(not_null<HistoryItem*> item) {
const auto i = ranges::find(_elements, item, &Element::item);
return (i != end(_elements)) ? i->started : 0;
}
HistoryItem *Provider::scrollTopStateItem(ListScrollTopState state) {
if (!state.position) {
return _elements.empty() ? nullptr : _elements.back().item.get();
}
const auto i = ranges::lower_bound(
_elements,
state.position,
ranges::less(),
&Element::started);
return (i != end(_elements))
? i->item.get()
: _elements.empty()
? nullptr
: _elements.back().item.get();
}
void Provider::saveState(
not_null<Media::Memento*> memento,
ListScrollTopState scrollState) {
if (!_elements.empty() && scrollState.item) {
memento->setAroundId({ PeerId(), 1 });
memento->setScrollTopItem(scrollState.item->globalId());
memento->setScrollTopItemPosition(scrollState.position);
memento->setScrollTopShift(scrollState.shift);
}
}
void Provider::restoreState(
not_null<Media::Memento*> memento,
Fn<void(ListScrollTopState)> restoreScrollState) {
if (memento->aroundId() == FullMsgId(PeerId(), 1)) {
restoreScrollState({
.position = memento->scrollTopItemPosition(),
.item = MessageByGlobalId(memento->scrollTopItem()),
.shift = memento->scrollTopShift(),
});
refreshViewer();
}
}
} // namespace Info::Downloads