Git: Allow colorful logs

Requires Git 2.3 or higher for RGB colors.

Can be enabled for the normal or graph log
with the "Color" tool button. For the diff
log, the old behavior is kept (highlighter
is used for the "normal" log, no colors at
all for the graph log)

Fixes: QTCREATORBUG-19624
Change-Id: I8a42a7ad0ebf99ceb459355310311d702dcf9977
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/git/giteditor.cpp

@@ -38,6 +38,7 @@
 #include <vcsbase/vcsbaseeditorconfig.h>
 #include <vcsbase/vcsoutputwindow.h>
 
+#include <utils/ansiescapecodehandler.h>
 #include <utils/qtcassert.h>
 #include <utils/temporaryfile.h>
 
@@ -205,6 +206,20 @@ void GitEditorWidget::setPlainText(const QString &text)
     // If desired, filter out the date from annotation
     switch (contentType())
     {
+    case LogOutput: {
+        Utils::AnsiEscapeCodeHandler handler;
+        const QList<Utils::FormattedText> formattedTextList
+                = handler.parseText(Utils::FormattedText(text));
+
+        clear();
+        QTextCursor cursor = textCursor();
+        cursor.beginEditBlock();
+        for (auto formattedChunk : formattedTextList)
+            cursor.insertText(formattedChunk.text, formattedChunk.format);
+        cursor.endEditBlock();
+
+        return;
+    }
     case AnnotateOutput:
         modText = sanitizeBlameOutput(text);
         break;