feat: Drag and drop to load subtitle

linuxdeepin/developer-center#927   (#38)

Author: BLumia

src/common/mainwindow.cpp

@@ -2794,8 +2794,30 @@ void MainWindow::dropEvent(QDropEvent *ev)
         return;
     }
 
-    auto urls = ev->mimeData()->urls();
-    auto valids = _engine->addPlayFiles(urls);
+    QList<QUrl> urls = ev->mimeData()->urls();
+    QList<QUrl> valids = _engine->addPlayFiles(urls);
+
+    if (urls.count() == 1 && valids.count() == 0) {
+        // check if the dropped file is a subtitle.
+        QFileInfo fileInfo(urls.first().toLocalFile());
+        if (_engine->subtitle_suffixs.contains(fileInfo.suffix())) {
+            bool succ = _engine->loadSubtitle(fileInfo);
+            // notice that the file loaded but won't automatically selected.
+            const PlayingMovieInfo& pmf = _engine->playingMovieInfo();
+            for (const SubtitleInfo& sub: pmf.subs) {
+                if (sub["external"].toBool()) {
+                    QString path = sub["external-filename"].toString();
+                    if (path == fileInfo.canonicalFilePath()) {
+                        _engine->selectSubtitle(pmf.subs.indexOf(sub));
+                        break;
+                    }
+                }
+            }
+            QPixmap icon = utils::LoadHiDPIPixmap(QString(":/resources/icons/%1.svg").arg(succ ? "success" : "fail"));
+            _nwComm->popupWithIcon(succ ? tr("Load successfully") : tr("Load failed"), icon);
+        }
+        return;
+    }
 
     {
         auto all = urls.toSet();

src/libdmr/player_engine.h

@@ -70,7 +70,7 @@ class PlayerEngine: public QWidget {
         "*.3g2","*.3ga","*.3gp","*.3gp2","*.3gpp","*.amv","*.asf","*.asx","*.avf","*.avi","*.bdm","*.bdmv","*.bik","*.clpi", "*.cpi","*.dat","*.divx","*.drc","*.dv","*.dvr-ms","*.f4v","*.flv","*.gvi","*.gxf","*.hdmov","*.hlv","*.iso","*.letv", "*.lrv","*.m1v","*.m2p","*.m2t","*.m2ts","*.m2v","*.m3u","*.m3u8","*.m4v","*.mkv","*.moov", "*.mov","*.mov","*.mp2","*.mp2v","*.mp4","*.mp4v","*.mpe","*.mpeg","*.mpeg1","*.mpeg2","*.mpeg4","*.mpg","*.mpl","*.mpls","*.mpv","*.mpv2","*.mqv", "*.mts","*.mts","*.mtv","*.mxf","*.mxg","*.nsv","*.nuv","*.ogg","*.ogm","*.ogv","*.ogx","*.ps","*.qt","*.qtvr","*.ram","*.rec", "*.rm","*.rm","*.rmj","*.rmm","*.rms","*.rmvb","*.rmx","*.rp","*.rpl","*.rv","*.rvx","*.thp","*.tod","*.tp","*.trp","*.ts","*.tts","*.txd","*.vcd", "*.vdr","*.vob","*.vp8","*.vro","*.webm","*.wm","*.wmv","*.wtv","*.xesc" ,"*.xspf"
     };
 
-    const QStringList subtitle_filetypes {"*.sub","*.srt","*.ass","*.ssa","*.smi","*.rt","*.txt","*.mks","*.vtt","*.sup"};
+    const QStringList subtitle_suffixs {"ass", "sub", "srt", "aqt", "jss", "gsub", "ssf", "ssa", "smi", "usf", "idx"};
 
     /* backend like mpv will asynchronously report end of playback. 
      * there are situations when we need to see the end-event before