From 19139a9a5f962e684a4b8e224b53cb7138d90659 Mon Sep 17 00:00:00 2001
From: 23rd <23rd@vivaldi.net>
Date: Mon, 12 Jul 2021 13:50:02 +0300
Subject: [PATCH] Added ability to generate single file preview from history
item.
---
Telegram/CMakeLists.txt | 2 +
.../attach_item_single_file_preview.cpp | 101 ++++++++++++++++++
.../attach/attach_item_single_file_preview.h | 39 +++++++
3 files changed, 142 insertions(+)
create mode 100644 Telegram/SourceFiles/ui/chat/attach/attach_item_single_file_preview.cpp
create mode 100644 Telegram/SourceFiles/ui/chat/attach/attach_item_single_file_preview.h
diff --git a/Telegram/CMakeLists.txt b/Telegram/CMakeLists.txt
index e31886e43..e49b62047 100644
--- a/Telegram/CMakeLists.txt
+++ b/Telegram/CMakeLists.txt
@@ -1069,6 +1069,8 @@ PRIVATE
support/support_helper.h
support/support_templates.cpp
support/support_templates.h
+ ui/chat/attach/attach_item_single_file_preview.cpp
+ ui/chat/attach/attach_item_single_file_preview.h
ui/effects/fireworks_animation.cpp
ui/effects/fireworks_animation.h
ui/effects/round_checkbox.cpp
diff --git a/Telegram/SourceFiles/ui/chat/attach/attach_item_single_file_preview.cpp b/Telegram/SourceFiles/ui/chat/attach/attach_item_single_file_preview.cpp
new file mode 100644
index 000000000..608320e0b
--- /dev/null
+++ b/Telegram/SourceFiles/ui/chat/attach/attach_item_single_file_preview.cpp
@@ -0,0 +1,101 @@
+/*
+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 "ui/chat/attach/attach_item_single_file_preview.h"
+
+#include "data/data_document.h"
+#include "data/data_document_media.h"
+#include "data/data_file_origin.h"
+#include "history/history_item.h"
+#include "history/view/media/history_view_document.h"
+#include "lang/lang_keys.h"
+#include "main/main_session.h"
+#include "ui/chat/attach/attach_prepare.h"
+#include "ui/text/format_song_name.h"
+#include "ui/text/format_values.h"
+#include "styles/style_chat.h"
+
+namespace Ui {
+
+ItemSingleFilePreview::ItemSingleFilePreview(
+ QWidget *parent,
+ not_null<HistoryItem*> item)
+: AbstractSingleFilePreview(parent) {
+ const auto media = item->media();
+ Assert(media != nullptr);
+ const auto document = media->document();
+ Assert(document != nullptr);
+
+ _documentMedia = document->createMediaView();
+ _documentMedia->thumbnailWanted(item->fullId());
+
+ rpl::single(
+ rpl::empty_value()
+ ) | rpl::then(
+ document->session().downloaderTaskFinished()
+ ) | rpl::start_with_next([=] {
+ if (_documentMedia->thumbnail()) {
+ _lifetimeDownload.destroy();
+ }
+ preparePreview(document);
+ }, _lifetimeDownload);
+}
+
+void ItemSingleFilePreview::preparePreview(not_null<DocumentData*> document) {
+ AbstractSingleFilePreview::Data data;
+
+ const auto preview = _documentMedia->thumbnail()
+ ? _documentMedia->thumbnail()->original()
+ : QImage();
+
+ prepareThumbFor(data, preview);
+ data.fileIsImage = document->isImage();
+ data.fileIsAudio = document->isAudioFile() || document->isVoiceMessage();
+
+ if (data.fileIsImage) {
+ data.name = document->filename();
+ // data.statusText = FormatImageSizeText(preview.size()
+ // / preview.devicePixelRatio());
+ } else if (data.fileIsAudio) {
+ auto filename = document->filename();
+
+ auto songTitle = QString();
+ auto songPerformer = QString();
+ if (const auto song = document->song()) {
+ songTitle = song->title;
+ songPerformer = song->performer;
+
+ if (document->isSongWithCover()) {
+ const auto size = QSize(
+ st::attachPreviewLayout.thumbSize,
+ st::attachPreviewLayout.thumbSize);
+ auto thumb = QPixmap(size);
+ thumb.fill(Qt::transparent);
+ Painter p(&thumb);
+
+ HistoryView::DrawThumbnailAsSongCover(
+ p,
+ _documentMedia,
+ QRect(QPoint(), size));
+ data.fileThumb = std::move(thumb);
+ }
+ } else if (document->isVoiceMessage()) {
+ songTitle = tr::lng_media_audio(tr::now);
+ }
+
+ data.name = Text::FormatSongName(filename, songTitle, songPerformer)
+ .string();
+ data.statusText = FormatSizeText(document->size);
+ } else {
+ data.name = document->filename();
+ }
+ data.statusText = FormatSizeText(document->size);
+
+ setData(data);
+}
+
+} // namespace Ui
diff --git a/Telegram/SourceFiles/ui/chat/attach/attach_item_single_file_preview.h b/Telegram/SourceFiles/ui/chat/attach/attach_item_single_file_preview.h
new file mode 100644
index 000000000..db6e90d79
--- /dev/null
+++ b/Telegram/SourceFiles/ui/chat/attach/attach_item_single_file_preview.h
@@ -0,0 +1,39 @@
+/*
+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
+*/
+#pragma once
+
+#include "ui/chat/attach/attach_abstract_single_file_preview.h"
+
+class HistoryItem;
+class DocumentData;
+
+namespace Data {
+class DocumentMedia;
+} // namespace Data
+
+namespace Ui {
+
+struct PreparedFile;
+class IconButton;
+
+class ItemSingleFilePreview final : public AbstractSingleFilePreview {
+public:
+ ItemSingleFilePreview(
+ QWidget *parent,
+ not_null<HistoryItem*> item);
+
+private:
+ void preparePreview(not_null<DocumentData*> document);
+
+ std::shared_ptr<::Data::DocumentMedia> _documentMedia;
+
+ rpl::lifetime _lifetimeDownload;
+
+};
+
+} // namespace Ui