Fix Q(Quick)WebEngineDownloadItem::setDownloadDirectory()

Keep the custom file name if the calling order of setDownloadDirectory()
and setDownloadFileName() changes.

Also do not emit patchChanged signal twice if setDownloadDirectory()
changes the uniquifier of the file name.

Add TempDir for qml auto tests what uses QTemporaryDir() to create
temporary directory for downloads.

See https://cgit.kde.org/messagelib.git/commit/?id=2c113dcb155b11bf2c0af3c85544962485784b26
for details.

Fixes: QTBUG-80566
Change-Id: Ia76f263558eaf55cb297700407948523788c6229
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

3 files changed, 19 insertions, 9 deletions

diff --git a/src/webengine/api/qquickwebenginedownloaditem.cpp b/src/webengine/api/qquickwebenginedownloaditem.cpp
index 6abd89910..767ada58f 100644
--- a/src/webengine/api/qquickwebenginedownloaditem.cpp
+++ b/src/webengine/api/qquickwebenginedownloaditem.cpp
@@ -112,6 +112,7 @@ QQuickWebEngineDownloadItemPrivate::QQuickWebEngineDownloadItemPrivate(QQuickWeb
     , downloadPaused(false)
     , view(nullptr)
     , downloadUrl(url)
+    , isCustomFileName(false)
 {
 }
 
@@ -511,25 +512,31 @@ void QQuickWebEngineDownloadItem::setDownloadDirectory(const QString &directory)
         return;
     }
 
+    bool isPathChanged = false;
     QString changeDirectory = d->downloadDirectory;
     if (!directory.isEmpty() && changeDirectory != directory) {
         changeDirectory = directory;
 
         if (d->downloadDirectory != changeDirectory) {
             d->downloadDirectory = changeDirectory;
-            Q_EMIT pathChanged();
             Q_EMIT downloadDirectoryChanged();
+            isPathChanged = true;
         }
 
-        QString newFileName = QFileInfo(d->profile->d_ptr->profileAdapter()->determineDownloadPath(d->downloadDirectory,
-                                                                                                   d->suggestedFileName,
-                                                                                                   d->startTime)).fileName();
-        if (d->downloadFileName != newFileName) {
-            d->downloadFileName = newFileName;
-            Q_EMIT pathChanged();
-            Q_EMIT downloadFileNameChanged();
+        if (!d->isCustomFileName) {
+            QString newFileName = QFileInfo(d->profile->d_ptr->profileAdapter()->determineDownloadPath(d->downloadDirectory,
+                                                                                                       d->suggestedFileName,
+                                                                                                       d->startTime)).fileName();
+            if (d->downloadFileName != newFileName) {
+                d->downloadFileName = newFileName;
+                Q_EMIT downloadFileNameChanged();
+                isPathChanged = true;
+            }
         }
     }
+
+    if (isPathChanged)
+        Q_EMIT pathChanged();
 }
 
 /*!
@@ -561,8 +568,9 @@ void QQuickWebEngineDownloadItem::setDownloadFileName(const QString &fileName)
 
     if (d->downloadFileName != fileName && !fileName.isEmpty()) {
         d->downloadFileName = fileName;
-        Q_EMIT pathChanged();
+        d->isCustomFileName = true;
         Q_EMIT downloadFileNameChanged();
+        Q_EMIT pathChanged();
     }
 }
 
diff --git a/src/webengine/api/qquickwebenginedownloaditem_p.h b/src/webengine/api/qquickwebenginedownloaditem_p.h
index beb359622..e1b1b9040 100644
--- a/src/webengine/api/qquickwebenginedownloaditem_p.h
+++ b/src/webengine/api/qquickwebenginedownloaditem_p.h
@@ -169,6 +169,7 @@ public:
     void setDownloadDirectory(const QString &directory);
     QString downloadFileName() const;
     void setDownloadFileName(const QString &fileName);
+    bool isCustomFileName;
 
 Q_SIGNALS:
     void stateChanged();
diff --git a/src/webengine/api/qquickwebenginedownloaditem_p_p.h b/src/webengine/api/qquickwebenginedownloaditem_p_p.h
index 1be6434ec..acd7fe806 100644
--- a/src/webengine/api/qquickwebenginedownloaditem_p_p.h
+++ b/src/webengine/api/qquickwebenginedownloaditem_p_p.h
@@ -87,6 +87,7 @@ public:
     QString suggestedFileName;
     QString downloadDirectory;
     QString downloadFileName;
+    bool isCustomFileName;
 
     void update(const QtWebEngineCore::ProfileAdapterClient::DownloadItemInfo &info);
     void updateState(QQuickWebEngineDownloadItem::DownloadState newState);