feat(playlist): compact rows with clean titles and durations

src/CMakeLists.txt

@@ -1,6 +1,8 @@
 # Code without UI (subtitles, mpv.conf handling, where translations are saved), kept
 # apart from the app so autotests can link it.
 add_library(qtpotato_core STATIC
+    media/mediainfo.cpp
+    media/mediainfo.h
     mpv/mpvuserconfig.cpp
     mpv/mpvuserconfig.h
     mpv/trackselection.cpp
@@ -12,7 +14,7 @@ add_library(qtpotato_core STATIC
     translate/translationstore.cpp
     translate/translationstore.h
 )
-target_include_directories(qtpotato_core PUBLIC mpv subtitles translate)
+target_include_directories(qtpotato_core PUBLIC media mpv subtitles translate)
 target_link_libraries(qtpotato_core PUBLIC
     Qt6::Core
     KF6::I18n

src/media/mediainfo.cpp

@@ -0,0 +1,129 @@
+// SPDX-FileCopyrightText: 2026 Tri Vo Khac
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "mediainfo.h"
+
+#include <QRegularExpression>
+#include <QSet>
+#include <QStringList>
+
+#include <algorithm>
+
+extern "C" {
+#include <libavformat/avformat.h>
+}
+
+using namespace Qt::Literals::StringLiterals;
+
+namespace
+{
+// Words that start the release details in scene-style names; everything after them is dropped.
+bool isReleaseTag(const QString &word)
+{
+    static const QSet<QString> tags{
+        u"web"_s,    u"web-dl"_s, u"webdl"_s,  u"webrip"_s, u"bluray"_s, u"blu-ray"_s, u"bdrip"_s,  u"brrip"_s,  u"hdtv"_s,
+        u"dvdrip"_s, u"hdrip"_s,  u"remux"_s,  u"uhd"_s,    u"dsnp"_s,   u"amzn"_s,    u"nf"_s,     u"hmax"_s,   u"atvp"_s,
+        u"hulu"_s,   u"pcok"_s,   u"dv"_s,     u"hdr"_s,    u"hdr10"_s,  u"hdr10+"_s,  u"sdr"_s,    u"x264"_s,   u"x265"_s,
+        u"h264"_s,   u"h265"_s,   u"hevc"_s,   u"avc"_s,    u"aac"_s,    u"ac3"_s,     u"dts"_s,    u"ddp"_s,    u"10bit"_s,
+        u"8bit"_s,   u"repack"_s, u"proper"_s, u"internal"_s, u"imax"_s, u"multi"_s,
+    };
+    static const QRegularExpression pattern(uR"(^(\d{3,4}[pi]|[248]k|ddp?\d.*|h\d{3}|aac\d.*|dts-.*)$)"_s, QRegularExpression::CaseInsensitiveOption);
+    const QString lower = word.toLower();
+    return tags.contains(lower) || pattern.match(lower).hasMatch();
+}
+
+bool isYear(const QString &word)
+{
+    static const QRegularExpression pattern(uR"(^\(?(19|20)\d\d\)?$)"_s);
+    return pattern.match(word).hasMatch();
+}
+
+// The words before the first release tag, joined by spaces.
+QString untilReleaseTags(const QString &text)
+{
+    QStringList kept;
+    const QStringList words = text.split(u' ', Qt::SkipEmptyParts);
+    for (const QString &word : words) {
+        if (isReleaseTag(word)) {
+            break;
+        }
+        kept.append(word);
+    }
+    // "Movie 2024" reads better as "Movie (2024)".
+    if (kept.size() > 1 && isYear(kept.last())) {
+        QString year = kept.takeLast();
+        year.remove(u'(').remove(u')');
+        kept.append(u"(%1)"_s.arg(year));
+    }
+    QString result = kept.join(u' ');
+    // Leftover separators like "Show -" when the tags followed a dash.
+    static const QRegularExpression trailing(uR"([\s\-–—:·]+$)"_s);
+    static const QRegularExpression leading(uR"(^[\s\-–—:·]+)"_s);
+    return result.remove(trailing).remove(leading);
+}
+}
+
+namespace MediaInfo
+{
+QString cleanTitle(const QString &fileName)
+{
+    QString base = fileName;
+    static const QRegularExpression extension(uR"(\.[A-Za-z0-9]{2,4}$)"_s);
+    base.remove(extension);
+    const QString fallback = base;
+
+    // "[Group] Name [1080p] (ABCD1234)": bracketed parts are release details.
+    static const QRegularExpression brackets(uR"(\[[^\]]*\]|\{[^}]*\})"_s);
+    base.remove(brackets);
+    // Parentheses too, when they hold release tags or a checksum, but not "(2024)".
+    static const QRegularExpression parens(uR"(\(([^)]*)\))"_s);
+    static const QRegularExpression wordSeparator(uR"([\s,]+)"_s);
+    static const QRegularExpression checksum(uR"(^[0-9A-Fa-f]{8}$)"_s);
+    for (auto it = parens.globalMatch(QString(base)); it.hasNext();) {
+        const auto match = it.next();
+        const QStringList words = match.captured(1).split(wordSeparator, Qt::SkipEmptyParts);
+        if (std::any_of(words.begin(), words.end(), isReleaseTag) || checksum.match(match.captured(1)).hasMatch()) {
+            base.replace(match.captured(0), u" "_s);
+        }
+    }
+
+    // Scene names use dots or underscores between words.
+    base.replace(u'_', u' ');
+    if (!base.trimmed().contains(u' ')) {
+        base.replace(u'.', u' ');
+    }
+    base = base.simplified();
+
+    static const QRegularExpression episode(uR"(\b[Ss](\d{1,2})[ ._-]?[Ee](\d{1,3})(?:-?[Ee]\d{1,3})*\b)"_s);
+    if (const auto match = episode.match(base); match.hasMatch()) {
+        const QString code = match.captured(0).toUpper().remove(u' ').remove(u'.').remove(u'_');
+        const QString episodeTitle = untilReleaseTags(base.mid(match.capturedEnd()));
+        if (!episodeTitle.isEmpty()) {
+            return u"%1 · %2"_s.arg(code, episodeTitle);
+        }
+        const QString show = untilReleaseTags(base.left(match.capturedStart()));
+        return show.isEmpty() ? code : u"%1 · %2"_s.arg(show, code);
+    }
+
+    const QString title = untilReleaseTags(base);
+    return title.isEmpty() ? fallback : title;
+}
+
+std::optional<double> probeDuration(const QString &path)
+{
+    AVFormatContext *context = nullptr;
+    if (avformat_open_input(&context, path.toUtf8().constData(), nullptr, nullptr) < 0) {
+        return std::nullopt;
+    }
+    // Most containers store the length in their header; others need a look at the streams.
+    if (context->duration == AV_NOPTS_VALUE || context->duration <= 0) {
+        avformat_find_stream_info(context, nullptr);
+    }
+    std::optional<double> seconds;
+    if (context->duration != AV_NOPTS_VALUE && context->duration > 0) {
+        seconds = double(context->duration) / AV_TIME_BASE;
+    }
+    avformat_close_input(&context);
+    return seconds;
+}
+}

src/media/mediainfo.h

@@ -0,0 +1,19 @@
+// SPDX-FileCopyrightText: 2026 Tri Vo Khac
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <QString>
+
+#include <optional>
+
+namespace MediaInfo
+{
+// A short title for a media file name, without the release tags: "Show.S01E01.Pilot.1080p.WEB.mkv"
+// becomes "S01E01 · Pilot" and "Movie.2024.2160p.BluRay.mkv" becomes "Movie (2024)". Returns the
+// name without its extension when nothing better is found.
+QString cleanTitle(const QString &fileName);
+
+// Length of the media file at \a path in seconds, or nothing when it can't be read.
+std::optional<double> probeDuration(const QString &path);
+}

src/playlist/playlistmodel.cpp

@@ -3,10 +3,13 @@
 
 #include "playlistmodel.h"
 
+#include "mediainfo.h"
+
 #include <QCollator>
 #include <QDir>
 #include <QFileInfo>
 #include <QMimeDatabase>
+#include <QtConcurrentRun>
 
 #include <algorithm>
 
@@ -15,6 +18,13 @@ using namespace Qt::Literals::StringLiterals;
 PlaylistModel::PlaylistModel(QObject *parent)
     : QAbstractListModel(parent)
 {
+    // Reading many files at once from one disk is slower than a few at a time.
+    m_probePool.setMaxThreadCount(2);
+}
+
+PlaylistModel::~PlaylistModel()
+{
+    m_probePool.clear();
 }
 
 int PlaylistModel::rowCount(const QModelIndex &parent) const
@@ -36,6 +46,10 @@ QVariant PlaylistModel::data(const QModelIndex &index, int role) const
         return url.isLocalFile() ? url.fileName() : url.toDisplayString();
     case IsPlayingRole:
         return index.row() == m_playingIndex;
+    case TitleRole:
+        return url.isLocalFile() ? MediaInfo::cleanTitle(url.fileName()) : url.toDisplayString();
+    case DurationRole:
+        return m_durations.value(url, -1);
     }
     return {};
 }
@@ -46,6 +60,8 @@ QHash<int, QByteArray> PlaylistModel::roleNames() const
         {UrlRole, "url"},
         {NameRole, "name"},
         {IsPlayingRole, "isPlaying"},
+        {TitleRole, "title"},
+        {DurationRole, "duration"},
     };
 }
 
@@ -127,6 +143,7 @@ void PlaylistModel::openFile(const QUrl &url, bool loadSiblings)
     m_playingIndex = -1;
     endResetModel();
     Q_EMIT countChanged();
+    probeDurations(m_urls);
     play(std::max<int>(0, int(m_urls.indexOf(url))));
 }
 
@@ -140,6 +157,7 @@ void PlaylistModel::append(const QList<QUrl> &urls)
     m_urls.append(added);
     endInsertRows();
     Q_EMIT countChanged();
+    probeDurations(added);
 }
 
 void PlaylistModel::replace(const QList<QUrl> &urls)
@@ -153,6 +171,7 @@ void PlaylistModel::replace(const QList<QUrl> &urls)
     m_playingIndex = -1;
     endResetModel();
     Q_EMIT countChanged();
+    probeDurations(m_urls);
     play(0);
 }
 
@@ -274,3 +293,25 @@ void PlaylistModel::setPlayingIndex(int index)
     }
     Q_EMIT playingIndexChanged();
 }
+
+void PlaylistModel::probeDurations(const QList<QUrl> &urls)
+{
+    for (const QUrl &url : urls) {
+        // Streams are skipped: opening them can take long and costs bandwidth.
+        if (!url.isLocalFile() || m_durations.contains(url)) {
+            continue;
+        }
+        m_durations.insert(url, -1);
+        QtConcurrent::run(&m_probePool, MediaInfo::probeDuration, url.toLocalFile()).then(this, [this, url](std::optional<double> seconds) {
+            if (!seconds) {
+                return;
+            }
+            m_durations.insert(url, *seconds);
+            for (int row = 0; row < m_urls.size(); ++row) {
+                if (m_urls.at(row) == url) {
+                    Q_EMIT dataChanged(index(row), index(row), {DurationRole});
+                }
+            }
+        });
+    }
+}

src/playlist/playlistmodel.h

@@ -4,7 +4,9 @@
 #pragma once
 
 #include <QAbstractListModel>
+#include <QHash>
 #include <QList>
+#include <QThreadPool>
 #include <QUrl>
 #include <QtQml/qqmlregistration.h>
 
@@ -24,10 +26,15 @@ public:
         UrlRole = Qt::UserRole + 1,
         NameRole,
         IsPlayingRole,
+        // Short name without release tags; see MediaInfo::cleanTitle().
+        TitleRole,
+        // Length in seconds, or -1 while unknown. Local files are read in the background.
+        DurationRole,
     };
     Q_ENUM(Roles)
 
     explicit PlaylistModel(QObject *parent = nullptr);
+    ~PlaylistModel() override;
 
     int rowCount(const QModelIndex &parent = {}) const override;
     QVariant data(const QModelIndex &index, int role) const override;
@@ -66,7 +73,12 @@ Q_SIGNALS:
 private:
     QList<QUrl> expand(const QList<QUrl> &urls) const;
     void setPlayingIndex(int index);
+    void probeDurations(const QList<QUrl> &urls);
 
     QList<QUrl> m_urls;
     int m_playingIndex = -1;
+    // Known lengths in seconds; -1 for files that couldn't be read or are still being read.
+    QHash<QUrl, double> m_durations;
+    // Declared last so it is destroyed first and waits for running probes.
+    QThreadPool m_probePool;
 };

src/qml/PlaylistItem.qml

@@ -8,20 +8,23 @@ import QtQuick.Layouts
 import org.kde.ki18n
 import org.kde.kirigami as Kirigami
 
-// One row of the playlist: row number, playing icon and file name.
+// One compact row of the playlist: row number (or playing icon), short title, length and,
+// on hover or focus, a remove button.
 Item {
     id: root
 
     required property int index
     required property url url
     required property string name
+    required property string title
+    required property real duration
     required property bool isPlaying
     required property PlaylistModel playlist
     required property MpvItem mpv
     property real alpha: QtPotatoSettings.playlistOverlayVideo ? 0.6 : 1
 
     readonly property bool hovered: hoverHandler.hovered
-    readonly property real fontSize: Kirigami.Theme.defaultFont.pointSize
+    readonly property bool highlighted: root.isPlaying && !root.hovered
     activeFocusOnTab: true
 
     function activate() {
@@ -32,6 +35,18 @@ Item {
         contextMenu.popup()
     }
 
+    // "1:02:03" or "4:05".
+    function formatDuration(seconds: real): string {
+        if (seconds < 0) {
+            return ""
+        }
+        const total = Math.round(seconds)
+        const hours = Math.floor(total / 3600)
+        const minutes = Math.floor(total / 60) % 60
+        const secs = String(total % 60).padStart(2, "0")
+        return hours > 0 ? `${hours}:${String(minutes).padStart(2, "0")}:${secs}` : `${minutes}:${secs}`
+    }
+
     Keys.onReturnPressed: root.activate()
     Keys.onEnterPressed: root.activate()
     Keys.onMenuPressed: root.showContextMenu()
@@ -42,15 +57,8 @@ Item {
         }
     }
 
-    function labelColor(): color {
-        if (root.isPlaying && !root.hovered) {
-            return Kirigami.Theme.highlightedTextColor
-        }
-        return Kirigami.Theme.textColor
-    }
-
     implicitWidth: ListView.view.width
-    implicitHeight: fontSize * 3
+    implicitHeight: titleLabel.implicitHeight + Kirigami.Units.smallSpacing * 2
 
     HoverHandler {
         id: hoverHandler
@@ -71,7 +79,7 @@ Item {
         anchors.fill: parent
         Kirigami.Theme.colorSet: Kirigami.Theme.View
         color: {
-            if (root.isPlaying && !root.hovered) {
+            if (root.highlighted) {
                 return Qt.alpha(Kirigami.Theme.highlightColor, root.alpha)
             }
             if (root.hovered) {
@@ -85,67 +93,75 @@ Item {
 
         RowLayout {
             anchors.fill: parent
+            anchors.leftMargin: Kirigami.Units.largeSpacing
+            anchors.rightMargin: removeButton.visible ? Kirigami.Units.smallSpacing : Kirigami.Units.largeSpacing
             spacing: Kirigami.Units.largeSpacing
 
-            Label {
-                text: root.index + 1
-                color: root.labelColor()
-                visible: QtPotatoSettings.playlistShowRowNumber
-                font.pointSize: root.fontSize
-                font.features: { "tnum": 1 }
-                horizontalAlignment: Qt.AlignHCenter
-                Layout.leftMargin: Kirigami.Units.largeSpacing
-                Layout.preferredWidth: rowNumberMetrics.width
-            }
-
-            TextMetrics {
-                id: rowNumberMetrics
-                font.pointSize: root.fontSize
-                text: String(root.playlist.count).replace(/./g, "0")
-            }
-
-            Rectangle {
-                color: Qt.alpha(Kirigami.Theme.textColor, 0.2)
-                visible: QtPotatoSettings.playlistShowRowNumber
-                Layout.preferredWidth: 1
+            // Same width on every row, so the titles line up.
+            Item {
                 Layout.fillHeight: true
-                Layout.topMargin: Kirigami.Units.smallSpacing
-                Layout.bottomMargin: Kirigami.Units.smallSpacing
-            }
+                Layout.preferredWidth: Math.max(QtPotatoSettings.playlistShowRowNumber ? rowNumberMetrics.width : 0,
+                                                Kirigami.Units.iconSizes.small)
 
-            Kirigami.Icon {
-                source: "media-playback-start"
-                color: root.labelColor()
-                visible: root.isPlaying
-                Layout.leftMargin: QtPotatoSettings.playlistShowRowNumber ? 0 : Kirigami.Units.largeSpacing
-                Layout.preferredHeight: Kirigami.Units.iconSizes.smallMedium
-                Layout.preferredWidth: Kirigami.Units.iconSizes.smallMedium
+                Label {
+                    anchors.centerIn: parent
+                    text: root.index + 1
+                    visible: QtPotatoSettings.playlistShowRowNumber && !root.isPlaying
+                    color: Kirigami.Theme.disabledTextColor
+                    font: Kirigami.Theme.smallFont
+                }
+
+                Kirigami.Icon {
+                    anchors.centerIn: parent
+                    width: Kirigami.Units.iconSizes.small
+                    height: Kirigami.Units.iconSizes.small
+                    source: "media-playback-start"
+                    color: root.highlighted ? Kirigami.Theme.highlightedTextColor : Kirigami.Theme.textColor
+                    visible: root.isPlaying
+                }
+
+                TextMetrics {
+                    id: rowNumberMetrics
+                    font: Kirigami.Theme.smallFont
+                    text: String(root.playlist.count).replace(/./g, "0")
+                }
             }
 
             LabelWithTooltip {
-                text: root.name
-                toolTipText: root.url.toString().startsWith("file://") ? decodeURIComponent(root.url.toString().substring(7)) : root.url
-                color: root.labelColor()
+                id: titleLabel
+                text: root.title
+                toolTipText: root.name
+                alwaysShowToolTip: root.title !== root.name
+                color: root.highlighted ? Kirigami.Theme.highlightedTextColor : Kirigami.Theme.textColor
                 elide: Text.ElideRight
-                font.pointSize: root.fontSize
-                font.bold: root.isPlaying
+                maximumLineCount: 1
                 verticalAlignment: Qt.AlignVCenter
                 Layout.fillWidth: true
-                Layout.leftMargin: !QtPotatoSettings.playlistShowRowNumber && !root.isPlaying ? Kirigami.Units.largeSpacing : 0
-                Layout.rightMargin: Kirigami.Units.largeSpacing
             }
 
-            Button {
+            Label {
+                text: root.formatDuration(root.duration)
+                visible: text !== ""
+                color: root.highlighted ? Kirigami.Theme.highlightedTextColor : Kirigami.Theme.disabledTextColor
+                font: Kirigami.Theme.smallFont
+            }
+
+            ToolButton {
+                id: removeButton
                 text: KI18n.i18nc("@action:button remove playlist item", "Remove")
                 icon.name: "list-remove"
+                icon.width: Kirigami.Units.iconSizes.small
+                icon.height: Kirigami.Units.iconSizes.small
                 display: AbstractButton.IconOnly
-                flat: true
+                focusPolicy: Qt.TabFocus
+                visible: root.hovered || root.activeFocus || activeFocus
+                padding: 0
                 Accessible.name: text
                 ToolTip.text: text
                 ToolTip.visible: hovered
                 ToolTip.delay: Kirigami.Units.toolTipDelay
-                Layout.preferredWidth: Kirigami.Units.iconSizes.smallMedium + Kirigami.Units.smallSpacing * 2
-                Layout.rightMargin: Kirigami.Units.smallSpacing
+                Layout.fillHeight: true
+                Layout.preferredWidth: height
                 onClicked: root.playlist.remove(root.index)
             }
         }