Enhancement: save to temporary file, open external application and reload

A new button has been added in "Edit DB Cell" dock, which saves the cell
data to a temporary file with extension according to detected data and
opens default external application for the file type. It then asks user to
reload the data in a dialog when they have finished editing the data. It
can be also used for viewing if the user cancels the reload.

See related issues #1791 and #1746

src/EditDialog.cpp

@@ -88,6 +88,7 @@ EditDialog::EditDialog(QWidget* parent)
             return;
         }
     });
+    connect(ui->actionOpenInExternal, &QAction::triggered, this, &EditDialog::openDataWithExternal);
 
     mustIndentAndCompact = Settings::getValue("databrowser", "indent_compact").toBool();
     ui->actionIndent->setChecked(mustIndentAndCompact);
@@ -1177,3 +1178,76 @@ void EditDialog::setWordWrapping(bool value)
     sciEdit->setWrapMode(value ? QsciScintilla::WrapWord : QsciScintilla::WrapNone);
     ui->qtEdit->setWordWrapMode(value ? QTextOption::WrapAtWordBoundaryOrAnywhere : QTextOption::NoWrap);
 }
+
+void EditDialog::openDataWithExternal()
+{
+    QString extension;
+    QStringList filters;
+    switch (dataType) {
+    case Image: {
+        // Images get special treatment.
+        // Determine the likely filename extension.
+        QByteArray cellData = hexEdit->data();
+        QBuffer imageBuffer(&cellData);
+        QImageReader imageReader(&imageBuffer);
+        extension = imageReader.format().toLower().prepend(".");
+        break;
+    }
+    case Binary:
+        extension = FILE_EXT_BIN_DEFAULT;
+        break;
+    case RtlText:
+    case Text:
+        if (ui->comboMode->currentIndex() == XmlEditor)
+            extension = FILE_EXT_XML_DEFAULT;
+        else
+            extension = FILE_EXT_TXT_DEFAULT;
+        break;
+    case JSON:
+        extension = FILE_EXT_JSON_DEFAULT;
+        break;
+    case SVG:
+        extension = FILE_EXT_SVG_DEFAULT;
+        break;
+    case XML:
+        extension = FILE_EXT_XML_DEFAULT;
+        break;
+    case Null:
+        return;
+    }
+    QTemporaryFile file (QDir::tempPath() + QString("/DB4S-XXXXXX") + extension);
+
+    if(file.open())
+    {
+        switch (dataSource) {
+        case HexBuffer:
+            file.write(hexEdit->data());
+            break;
+        case SciBuffer:
+            // Data source is the Scintilla buffer
+            file.write(sciEdit->text().toUtf8());
+            break;
+        case QtBuffer:
+            // Data source is the text buffer
+            file.write(ui->qtEdit->toPlainText().toUtf8());
+            break;
+        }
+        file.close();
+
+        emit requestUrlOrFileOpen(file.fileName());
+
+        QMessageBox::StandardButton reply = QMessageBox::information
+            (nullptr,
+             QApplication::applicationName(),
+             tr("The data has been saved to a temporary file and has been opened with the default application."
+                "You can edit now the file and when your are ready, you can apply the saved new data to the cell or cancel any changes."),
+             QMessageBox::Apply | QMessageBox::Cancel);
+
+        QFile readFile(file.fileName());
+        if(reply == QMessageBox::Apply && readFile.open(QIODevice::ReadOnly)){
+            QByteArray d = readFile.readAll();
+            loadData(d);
+            readFile.close();
+        }
+    }
+}

src/EditDialog.h

@@ -100,6 +100,7 @@ private:
     bool promptInvalidData(const QString& data_type, const QString& errorString);
     void setDataInBuffer(const QByteArray& bArrdata, DataSources source);
     void setStackCurrentIndex(int editMode);
+    void openDataWithExternal();
 };
 
 #endif

src/EditDialog.ui

@@ -124,6 +124,7 @@
        <addaction name="actionIndent"/>
        <addaction name="actionImport"/>
        <addaction name="actionExport"/>
+       <addaction name="actionOpenInExternal"/>
        <addaction name="actionOpenInApp"/>
        <addaction name="actionNull"/>
        <addaction name="actionPrint"/>
@@ -448,6 +449,18 @@ Errors are indicated with a red squiggle underline.</string>
     <string>Opens a file dialog used to import any kind of data to this database cell.</string>
    </property>
   </action>
+  <action name="actionOpenInExternal">
+   <property name="icon">
+    <iconset resource="icons/icons.qrc">
+     <normaloff>:/icons/open_data_in_app</normaloff>:/icons/open_data_in_app</iconset>
+   </property>
+   <property name="text">
+    <string>Open in external application</string>
+   </property>
+   <property name="toolTip">
+    <string>Open in external application</string>
+   </property>
+  </action>
  </widget>
  <tabstops>
   <tabstop>comboMode</tabstop>

src/FileDialog.h

@@ -25,6 +25,7 @@ static const QString FILE_FILTER_ALL(QObject::tr("All Files (*)"));
 
 // Text Files Extensions Filter
 static const QString FILE_FILTER_TXT(QObject::tr("Text Files (*.txt)"));
+static const QString FILE_EXT_TXT_DEFAULT(".txt");
 
 // Comma,Tab,or Delimiter-Separated Values File Extensions Filter
 static const QString FILE_FILTER_CSV(QObject::tr("Comma-Separated Values Files (*.csv)"));
@@ -38,12 +39,15 @@ static const QString FILE_EXT_JSON_DEFAULT(".json");
 
 // XML File Extensions Filter
 static const QString FILE_FILTER_XML(QObject::tr("XML Files (*.xml)"));
+static const QString FILE_EXT_XML_DEFAULT(".xml");
 
 // Binary File Extensions Filter
 static const QString FILE_FILTER_BIN(QObject::tr("Binary Files (*.bin *.dat)"));
+static const QString FILE_EXT_BIN_DEFAULT(".bin");
 
 // Scalar Vector Graphics File Extensions Filter
 static const QString FILE_FILTER_SVG(QObject::tr("SVG Files (*.svg)"));
+static const QString FILE_EXT_SVG_DEFAULT(".svg");
 
 // Hex-Dump File Extension Filter
 static const QString FILE_FILTER_HEX(QObject::tr("Hex Dump Files (*.dat *.bin)"));

src/icons/icons.qrc

@@ -100,5 +100,6 @@
         <file alias="add_cond_format">style_add.png</file>
         <file alias="open_in_app">application_link.png</file>
         <file alias="document_link">document-link.png</file>
+        <file alias="open_data_in_app">application_go.png</file>
     </qresource>
 </RCC>