Git: Extend show output on diff editor

Change-Id: I51d3d0af96b28ec56bedaac163f9ce72158d8dc2
Reviewed-by: André Hartmann <aha_1980@gmx.de>
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/git/gitclient.cpp

@@ -273,8 +273,10 @@ void GitDiffHandler::slotShowDescriptionReceived(const QString &description)
     if (m_editor.isNull())
         return;
     DiffEditor::DiffShowEditor *editor = qobject_cast<DiffEditor::DiffShowEditor *>(m_editor);
-    if (editor)
+    if (editor) {
-        editor->setDescription(description);
+        editor->setDescription(GitPlugin::instance()->gitClient()->
+                               extendedShowDescription(m_workingDirectory, description));
+    }
 
     collectFilesList(QStringList()
                      << m_requestedRevisionRange.begin.id
@@ -2554,6 +2556,34 @@ void GitClient::continuePreviousGitCommand(const QString &workingDirectory,
     }
 }
 
+QString GitClient::extendedShowDescription(const QString &workingDirectory, const QString &text)
+{
+    if (!text.startsWith(QLatin1String("commit ")))
+        return text;
+    QString modText = text;
+    QString precedes, follows;
+    int lastHeaderLine = modText.indexOf(QLatin1String("\n\n")) + 1;
+    const QString commit = modText.mid(7, 8);
+    synchronousTagsForCommit(workingDirectory, commit, precedes, follows);
+    if (!precedes.isEmpty())
+        modText.insert(lastHeaderLine, QLatin1String("Precedes: ") + precedes + QLatin1Char('\n'));
+    if (!follows.isEmpty())
+        modText.insert(lastHeaderLine, QLatin1String("Follows: ") + follows + QLatin1Char('\n'));
+    QString moreBranches;
+    QStringList branches = synchronousBranchesForCommit(workingDirectory, commit);
+    const int branchCount = branches.count();
+    // If there are more than 20 branches, list first 10 followed by a hint
+    if (branchCount > 20) {
+        const int leave = 10;
+        moreBranches = tr(" and %1 more").arg(branchCount - leave);
+        branches.erase(branches.begin() + leave, branches.end());
+    }
+    modText.insert(lastHeaderLine, QLatin1String("Branches: ")
+                   + branches.join(QLatin1String(", ")) + moreBranches
+                   + QLatin1Char('\n'));
+    return modText;
+}
+
 // Quietly retrieve branch list of remote repository URL
 //
 // The branch HEAD is pointing to is always returned first.

src/plugins/git/gitclient.h

@@ -302,6 +302,8 @@ public:
     void continuePreviousGitCommand(const QString &workingDirectory, const QString &msgBoxTitle, QString msgBoxText,
                                     const QString &buttonName, const QString &gitCommand, bool requireChanges = true);
 
+    QString extendedShowDescription(const QString &workingDirectory, const QString &text);
+
     void launchGitK(const QString &workingDirectory, const QString &fileName);
     void launchGitK(const QString &workingDirectory) { launchGitK(workingDirectory, QString()); }
     bool launchGitGui(const QString &workingDirectory);

src/plugins/git/giteditor.cpp

@@ -183,32 +183,12 @@ void GitEditor::setPlainTextFiltered(const QString &text)
         break;
     }
     case VcsBase::DiffOutput: {
-        if (modText.isEmpty())
+        if (modText.isEmpty()) {
             modText = QLatin1String("No difference to HEAD");
+        } else {
             const QFileInfo fi(source());
             const QString workingDirectory = fi.isDir() ? fi.absoluteFilePath() : fi.absolutePath();
-        QString precedes, follows;
+            modText = plugin->gitClient()->extendedShowDescription(workingDirectory, modText);
-        if (modText.startsWith(QLatin1String("commit "))) { // show
-            int lastHeaderLine = modText.indexOf(QLatin1String("\n\n")) + 1;
-            const QString commit = modText.mid(7, 8);
-            plugin->gitClient()->synchronousTagsForCommit(workingDirectory, commit, precedes, follows);
-            if (!precedes.isEmpty())
-                modText.insert(lastHeaderLine, QLatin1String("Precedes: ") + precedes + QLatin1Char('\n'));
-            if (!follows.isEmpty())
-                modText.insert(lastHeaderLine, QLatin1String("Follows: ") + follows + QLatin1Char('\n'));
-            QString moreBranches;
-            QStringList branches = plugin->gitClient()->synchronousBranchesForCommit(
-                        workingDirectory, commit);
-            const int branchCount = branches.count();
-            // If there are more than 20 branches, list first 10 followed by a hint
-            if (branchCount > 20) {
-                const int leave = 10;
-                moreBranches = tr(" and %1 more").arg(branchCount - leave);
-                branches.erase(branches.begin() + leave, branches.end());
-            }
-            modText.insert(lastHeaderLine, QLatin1String("Branches: ")
-                           + branches.join(QLatin1String(", ")) + moreBranches
-                           + QLatin1Char('\n'));
         }
         break;
     }