tdesktop/Telegram/SourceFiles/editor/editor_paint.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 "editor/editor_paint.h"
#include "core/mime_type.h"
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#include "ui/boxes/confirm_box.h"
#include "editor/controllers/controllers.h"
#include "editor/scene/scene.h"
#include "editor/scene/scene_item_canvas.h"
#include "editor/scene/scene_item_image.h"
#include "editor/scene/scene_item_sticker.h"
#include "lottie/lottie_single_player.h"
#include "storage/storage_media_prepare.h"
#include "ui/chat/attach/attach_prepare.h"
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#include "ui/ui_utility.h"
#include <QGraphicsView>
#include <QtCore/QMimeData>
namespace Editor {
namespace {
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constexpr auto kMaxBrush = 25.;
constexpr auto kMinBrush = 1.;
std::shared_ptr<Scene> EnsureScene(
PhotoModifications &mods,
const QSize &size) {
if (!mods.paint) {
mods.paint = std::make_shared<Scene>(QRectF(QPointF(), size));
}
return mods.paint;
}
} // namespace
using ItemPtr = std::shared_ptr<QGraphicsItem>;
Paint::Paint(
not_null<Ui::RpWidget*> parent,
PhotoModifications &modifications,
const QSize &imageSize,
std::shared_ptr<Controllers> controllers)
: RpWidget(parent)
, _controllers(controllers)
, _scene(EnsureScene(modifications, imageSize))
, _view(base::make_unique_q<QGraphicsView>(_scene.get(), this))
, _imageSize(imageSize) {
Expects(modifications.paint != nullptr);
keepResult();
_view->show();
_view->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
_view->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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_view->setFrameStyle(int(QFrame::NoFrame) | QFrame::Plain);
_view->viewport()->setAutoFillBackground(false);
// Undo / Redo.
controllers->undoController->performRequestChanges(
) | rpl::start_with_next([=](const Undo &command) {
if (command == Undo::Undo) {
_scene->performUndo();
} else {
_scene->performRedo();
}
_hasUndo = _scene->hasUndo();
_hasRedo = _scene->hasRedo();
}, lifetime());
controllers->undoController->setCanPerformChanges(rpl::merge(
_hasUndo.value() | rpl::map([](bool enable) {
return UndoController::EnableRequest{
.command = Undo::Undo,
.enable = enable,
};
}),
_hasRedo.value() | rpl::map([](bool enable) {
return UndoController::EnableRequest{
.command = Undo::Redo,
.enable = enable,
};
})));
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if (controllers->stickersPanelController) {
using ShowRequest = StickersPanelController::ShowRequest;
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controllers->stickersPanelController->setShowRequestChanges(
controllers->stickersPanelController->stickerChosen(
) | rpl::map_to(ShowRequest::HideAnimated));
controllers->stickersPanelController->stickerChosen(
) | rpl::start_with_next([=](not_null<DocumentData*> document) {
const auto item = std::make_shared<ItemSticker>(
document,
itemBaseData());
_scene->addItem(item);
_scene->clearSelection();
}, lifetime());
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}
rpl::merge(
controllers->stickersPanelController
? controllers->stickersPanelController->stickerChosen(
) | rpl::to_empty
: rpl::never<>() | rpl::type_erased(),
_scene->addsItem()
) | rpl::start_with_next([=] {
clearRedoList();
updateUndoState();
}, lifetime());
_scene->removesItem(
) | rpl::start_with_next([=] {
updateUndoState();
}, lifetime());
}
void Paint::applyTransform(QRect geometry, int angle, bool flipped) {
if (geometry.isEmpty()) {
return;
}
setGeometry(geometry);
const auto size = geometry.size();
const auto rotatedImageSize = QTransform()
.rotate(angle)
.mapRect(QRect(QPoint(), _imageSize));
const auto ratioW = size.width() / float64(rotatedImageSize.width())
* (flipped ? -1 : 1);
const auto ratioH = size.height() / float64(rotatedImageSize.height());
_view->setTransform(QTransform().scale(ratioW, ratioH).rotate(angle));
_view->setGeometry(QRect(QPoint(), size));
_transform = {
.angle = angle,
.flipped = flipped,
.zoom = size.width() / float64(_scene->sceneRect().width()),
};
_scene->updateZoom(_transform.zoom);
}
std::shared_ptr<Scene> Paint::saveScene() const {
_scene->save(SaveState::Save);
return _scene->items().empty()
? nullptr
: _scene;
}
void Paint::restoreScene() {
_scene->restore(SaveState::Save);
}
void Paint::cancel() {
_scene->restore(SaveState::Keep);
}
void Paint::keepResult() {
_scene->save(SaveState::Keep);
}
void Paint::clearRedoList() {
_scene->clearRedoList();
_hasRedo = false;
}
void Paint::updateUndoState() {
_hasUndo = _scene->hasUndo();
_hasRedo = _scene->hasRedo();
}
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void Paint::applyBrush(const Brush &brush) {
_scene->applyBrush(
brush.color,
(kMinBrush + float64(kMaxBrush - kMinBrush) * brush.sizeRatio));
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}
void Paint::handleMimeData(const QMimeData *data) {
const auto add = [&](QImage image) {
if (image.isNull()) {
return;
}
if (!Ui::ValidateThumbDimensions(image.width(), image.height())) {
_controllers->show->showBox(
Ui::MakeInformBox(tr::lng_edit_media_invalid_file()));
return;
}
const auto item = std::make_shared<ItemImage>(
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Ui::PixmapFromImage(std::move(image)),
itemBaseData());
_scene->addItem(item);
_scene->clearSelection();
};
using Error = Ui::PreparedList::Error;
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const auto premium = false; // Don't support > 2GB files here.
const auto list = Core::ReadMimeUrls(data);
auto result = !list.isEmpty()
? Storage::PrepareMediaList(
list.mid(0, 1),
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_imageSize.width() / 2,
premium)
: Ui::PreparedList(Error::EmptyFile, QString());
if (result.error == Error::None) {
add(base::take(result.files.front().preview));
} else if (auto read = Core::ReadMimeImage(data)) {
add(std::move(read.image));
}
}
ItemBase::Data Paint::itemBaseData() const {
const auto s = _scene->sceneRect().toRect().size();
const auto size = std::min(s.width(), s.height()) / 2;
const auto x = s.width() / 2;
const auto y = s.height() / 2;
return ItemBase::Data{
.initialZoom = _transform.zoom,
.zPtr = _scene->lastZ(),
.size = size,
.x = x,
.y = y,
.flipped = _transform.flipped,
.rotation = -_transform.angle,
.imageSize = _imageSize,
};
}
} // namespace Editor