Utils: Allow full file paths with directory parts

... when creating a new empty file.

This simplifies file creation with file paths cut&paste from external
applications as it removes the need to split it into a directory part
and the file name.

Change-Id: I3f81db89d5ae7db4117c29a4f947cdf92dc4d50c
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/libs/utils/filewizardpage.cpp

@@ -95,6 +95,11 @@ void FileWizardPage::setFileName(const QString &name)
     d->m_ui.nameLineEdit->setText(name);
 }
 
+void FileWizardPage::setAllowDirectoriesInFileSelector(bool allow)
+{
+    d->m_ui.nameLineEdit->setAllowDirectories(allow);
+}
+
 bool FileWizardPage::isComplete() const
 {
     return d->m_complete;

src/libs/utils/filewizardpage.h

@@ -54,6 +54,7 @@ public:
 
     bool forceFirstCapitalLetterForFileName() const;
     void setForceFirstCapitalLetterForFileName(bool b);
+    void setAllowDirectoriesInFileSelector(bool allow);
 
     // Validate a base name entry field (potentially containing extension)
     static bool validateBaseName(const QString &name, QString *errorMessage = nullptr);

src/plugins/projectexplorer/jsonwizard/jsonfilepage.cpp

@@ -27,13 +27,17 @@
 
 #include "jsonwizard.h"
 
-#include <QFileInfo>
-#include <QVariant>
+#include <utils/filepath.h>
+
+using namespace Utils;
 
 namespace ProjectExplorer {
 
-JsonFilePage::JsonFilePage(QWidget *parent) : Utils::FileWizardPage(parent)
-{ }
+JsonFilePage::JsonFilePage(QWidget *parent)
+    : FileWizardPage(parent)
+{
+    setAllowDirectoriesInFileSelector(true);
+}
 
 void JsonFilePage::initializePage()
 {
@@ -53,16 +57,13 @@ bool JsonFilePage::validatePage()
     if (path().isEmpty() || fileName().isEmpty())
         return false;
 
-    QFileInfo d(path());
-    if (!d.isDir())
+    const FilePath dir = FilePath::fromString(path());
+    if (!dir.isDir())
         return false;
 
-    QString target = d.absoluteFilePath();
-    if (!target.endsWith(QLatin1Char('/')))
-        target += QLatin1Char('/');
-    target += fileName();
+    const FilePath target = dir.resolvePath(fileName());
 
-    wizard()->setProperty("TargetPath", target);
+    wizard()->setProperty("TargetPath", target.toString());
     return true;
 }