Core: Allow users to open output window contents in scratch buffer

Task-number: QTCREATORBUG-31144
Change-Id: I474e60392281c5e3bd769d64719c3c6a31c57d2f
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/libs/utils/fileutils.cpp

@@ -15,6 +15,7 @@
 #include <QDataStream>
 #include <QDateTime>
 #include <QDebug>
+#include <QFileInfo>
 #include <QRegularExpression>
 #include <QTemporaryFile>
 #include <QTextStream>
@@ -828,6 +829,27 @@ FilePath FileUtils::homePath()
     return FilePath::fromUserInput(QDir::homePath());
 }
 
+expected_str<FilePath> FileUtils::scratchBufferFilePath(const QString &pattern)
+{
+    QString tmp = pattern;
+    QFileInfo fi(tmp);
+    if (!fi.isAbsolute()) {
+        QString tempPattern = QDir::tempPath();
+        if (!tempPattern.endsWith(QLatin1Char('/')))
+            tempPattern += QLatin1Char('/');
+        tmp = tempPattern + tmp;
+    }
+
+    QTemporaryFile file(tmp);
+    file.setAutoRemove(false);
+    if (!file.open()) {
+        return make_unexpected(Tr::tr("Failed to set up scratch buffer in \"%1\".")
+                                   .arg(FilePath::fromString(tmp).parentDir().toUserOutput()));
+    }
+    file.close();
+    return FilePath::fromString(file.fileName());
+}
+
 FilePaths FileUtils::toFilePathList(const QStringList &paths)
 {
     return transform(paths, &FilePath::fromString);

src/libs/utils/fileutils.h

@@ -5,6 +5,7 @@
 
 #include "utils_global.h"
 
+#include "expected.h"
 #include "filepath.h"
 
 #include <QCoreApplication>
@@ -79,6 +80,7 @@ public:
     static FilePath commonPath(const FilePath &oldCommonPath, const FilePath &fileName);
     static FilePath commonPath(const FilePaths &paths);
     static FilePath homePath();
+    static expected_str<FilePath> scratchBufferFilePath(const QString &pattern);
 
     static FilePaths toFilePathList(const QStringList &paths);
 

src/plugins/coreplugin/corejsextensions.cpp

@@ -3,6 +3,8 @@
 
 #include "corejsextensions.h"
 
+#include "messagemanager.h"
+
 #include <utils/appinfo.h>
 #include <utils/fileutils.h>
 #include <utils/mimeutils.h>
@@ -126,20 +128,12 @@ QString UtilsJsExtension::mktemp(const QString &pattern) const
     QString tmp = pattern;
     if (tmp.isEmpty())
         tmp = QStringLiteral("qt_temp.XXXXXX");
-    QFileInfo fi(tmp);
-    if (!fi.isAbsolute()) {
-        QString tempPattern = QDir::tempPath();
-        if (!tempPattern.endsWith(QLatin1Char('/')))
-            tempPattern += QLatin1Char('/');
-        tmp = tempPattern + tmp;
+    const auto res = FileUtils::scratchBufferFilePath(tmp);
+    if (!res) {
+        MessageManager::writeDisrupting(res.error());
+        return {};
     }
-
-    QTemporaryFile file(tmp);
-    file.setAutoRemove(false);
-    const bool isOpen = file.open();
-    QTC_ASSERT(isOpen, return {});
-    file.close();
-    return file.fileName();
+    return res->toFSPathString();
 }
 
 QString UtilsJsExtension::asciify(const QString &input) const

src/plugins/coreplugin/outputwindow.cpp

@@ -10,9 +10,11 @@
 #include "editormanager/editormanager.h"
 #include "find/basetextfind.h"
 #include "icore.h"
+#include "messagemanager.h"
 
 #include <aggregation/aggregate.h>
 
+#include <utils/fileutils.h>
 #include <utils/outputformatter.h>
 #include <utils/qtcassert.h>
 
@@ -294,6 +296,27 @@ void OutputWindow::contextMenuEvent(QContextMenuEvent *event)
         QFileDialog::saveFileContent(toPlainText().toUtf8(), d->outputFileNameHint);
     });
     saveAction->setEnabled(!document()->isEmpty());
+    QAction *openAction = menu->addAction(Tr::tr("Copy Contents to Scratch Buffer"));
+    connect(openAction, &QAction::triggered, this, [this] {
+        QString scratchBufferPrefix = FilePath::fromString(d->outputFileNameHint).baseName();
+        if (scratchBufferPrefix.isEmpty())
+            scratchBufferPrefix = "scratch";
+        const auto tempPath = FileUtils::scratchBufferFilePath(
+            QString::fromUtf8("%1-XXXXXX.txt").arg(scratchBufferPrefix));
+        if (!tempPath) {
+            MessageManager::writeDisrupting(tempPath.error());
+            return;
+        }
+        IEditor * const editor = EditorManager::openEditor(*tempPath);
+        if (!editor) {
+            MessageManager::writeDisrupting(
+                Tr::tr("Failed to open editor for \"%1\".").arg(tempPath->toUserOutput()));
+            return;
+        }
+        editor->document()->setTemporary(true);
+        editor->document()->setContents(toPlainText().toUtf8());
+    });
+    openAction->setEnabled(!document()->isEmpty());
 
     menu->addSeparator();
     QAction *clearAction = menu->addAction(Tr::tr("Clear"));