Git/VCS: Use spinning progress indicator for log view

Show a spinning progress indicator instead of the "Waiting for data"
text for e.g. the git log view and other commands that use
VcsBaseEditor.

Change-Id: Ie4c73f85397f8809bda6bb276140eb695d96174f
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/git/gitclient.cpp

@@ -727,7 +727,6 @@ const char *GitClient::stashNamePrefix = "stash@{";
 
 GitClient::GitClient(GitSettings *settings) :
     m_cachedGitVersion(0),
-    m_msgWait(tr("Waiting for data...")),
     m_settings(settings),
     m_disableEditor(false)
 {
@@ -797,7 +796,7 @@ VcsBaseEditorWidget *GitClient::findExistingVCSEditor(const char *registerDynami
 
     // Exists already
     EditorManager::activateEditor(outputEditor);
-    outputEditor->document()->setContents(m_msgWait.toUtf8());
+    outputEditor->document()->setContents(QByteArray()); // clear
     rc = VcsBaseEditor::getVcsBaseEditor(outputEditor);
 
     return rc;
@@ -926,8 +925,7 @@ VcsBaseEditorWidget *GitClient::createVcsEditor(
     QTC_CHECK(!findExistingVCSEditor(registerDynamicProperty, dynamicPropertyValue));
 
     // Create new, set wait message, set up with source and codec
-    IEditor *outputEditor = EditorManager::openEditorWithContents(id, &title,
-                                                                              m_msgWait.toUtf8());
+    IEditor *outputEditor = EditorManager::openEditorWithContents(id, &title);
     outputEditor->document()->setProperty(registerDynamicProperty, dynamicPropertyValue);
     rc = VcsBaseEditor::getVcsBaseEditor(outputEditor);
     connect(rc, SIGNAL(annotateRevisionRequested(QString,QString,QString,int)),

src/plugins/git/gitclient.h

@@ -435,7 +435,6 @@ private:
     mutable Utils::FileName m_gitVersionForBinary;
     mutable unsigned m_cachedGitVersion;
 
-    const QString m_msgWait;
     GitSettings *m_settings;
     QString m_gitQtcEditor;
     QMap<QString, StashInfo> m_stashInfo;

src/plugins/vcsbase/vcsbaseeditor.cpp

@@ -46,6 +46,7 @@
 #include <projectexplorer/session.h>
 #include <texteditor/textdocument.h>
 #include <texteditor/textdocumentlayout.h>
+#include <utils/progressindicator.h>
 #include <utils/qtcassert.h>
 
 #include <QDebug>
@@ -573,6 +574,7 @@ public:
     QPointer<VcsCommand> m_command;
     QObject *m_describeReceiver;
     const char *m_describeSlot;
+    Utils::ProgressIndicator *m_progressIndicator;
 
 private:
     QComboBox *m_entriesComboBox;
@@ -589,6 +591,7 @@ VcsBaseEditorWidgetPrivate::VcsBaseEditorWidgetPrivate(VcsBaseEditorWidget *edit
     m_mouseDragging(false),
     m_describeReceiver(0),
     m_describeSlot(0),
+    m_progressIndicator(0),
     m_entriesComboBox(0)
 {
     m_textCursorHandlers.append(new ChangeTextCursorHandler(editorWidget));
@@ -1352,9 +1355,18 @@ VcsBaseEditorParameterWidget *VcsBaseEditorWidget::configurationWidget() const
 
 void VcsBaseEditorWidget::setCommand(VcsCommand *command)
 {
-    if (d->m_command)
+    if (d->m_command) {
         d->m_command->abort();
+        hideProgressIndicator();
+    }
     d->m_command = command;
+    if (d->m_command) {
+        d->m_progressIndicator = new Utils::ProgressIndicator(Utils::ProgressIndicator::Large);
+        d->m_progressIndicator->attachToWidget(this);
+        connect(d->m_command, &VcsCommand::finished,
+                this, &VcsBaseEditorWidget::hideProgressIndicator);
+        QTimer::singleShot(100, this, SLOT(showProgressIndicator()));
+    }
 }
 
 // Find the complete file from a diff relative specification.
@@ -1439,6 +1451,19 @@ void VcsBaseEditorWidget::slotPaste()
     }
 }
 
+void VcsBaseEditorWidget::showProgressIndicator()
+{
+    if (!d->m_progressIndicator) // already stopped and deleted
+        return;
+    d->m_progressIndicator->show();
+}
+
+void VcsBaseEditorWidget::hideProgressIndicator()
+{
+    delete d->m_progressIndicator;
+    d->m_progressIndicator = 0;
+}
+
 bool VcsBaseEditorWidget::canApplyDiffChunk(const DiffChunk &dc) const
 {
     if (!dc.isValid())

src/plugins/vcsbase/vcsbaseeditor.h

@@ -242,6 +242,8 @@ private slots:
     void slotAnnotateRevision();
     void slotApplyDiffChunk();
     void slotPaste();
+    void showProgressIndicator();
+    void hideProgressIndicator();
 
 protected:
     /* A helper that can be used to locate a file in a diff in case it