Git: Add full blame and showing file from Instant Blame

Add actions to get the full file blame at the current lines
revsion respective its parent revision and to show the whole
file at the lines revision.

Change-Id: I2c6a1e98967cd40d658afe6bfedf0a0d9e988186
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/git/instantblame.cpp

@@ -67,8 +67,31 @@ bool BlameMark::addToolTipContent(QLayout *target) const
     auto textLabel = new QLabel;
     textLabel->setText(toolTip());
     target->addWidget(textLabel);
-    QObject::connect(textLabel, &QLabel::linkActivated, textLabel, [this] {
-        gitClient().show(m_info.filePath, m_info.sha1);
+    QObject::connect(textLabel, &QLabel::linkActivated, textLabel, [this](const QString &link) {
+        qCInfo(log) << "Link activated with target:" << link;
+        const QString sha1 = (link == "blameParent") ? m_info.sha1 + "^" : m_info.sha1;
+
+        if (link.startsWith("blame") || link == "showFile") {
+            const VcsBasePluginState state = currentState();
+            QTC_ASSERT(state.hasTopLevel(), return);
+            const Utils::FilePath path = state.topLevel();
+
+            const QString originalFileName = m_info.originalFileName;
+            if (link.startsWith("blame")) {
+                qCInfo(log).nospace().noquote() << "Blaming: \"" << path << "/" << originalFileName
+                                                << "\":" << m_info.line << " @ " << sha1;
+                gitClient().annotate(path, originalFileName, m_info.line, sha1);
+            } else {
+                qCInfo(log).nospace().noquote() << "Showing file: \"" << path << "/"
+                                                << originalFileName << "\" @ " << sha1;
+
+                const auto fileName = Utils::FilePath::fromString(originalFileName);
+                gitClient().openShowEditor(path, sha1, fileName);
+            }
+        } else {
+            qCInfo(log).nospace().noquote() << "Showing commit: " << sha1 << " for " << m_info.filePath;
+            gitClient().show(m_info.filePath, sha1);
+        }
     });
 
     return true;
@@ -77,14 +100,20 @@ bool BlameMark::addToolTipContent(QLayout *target) const
 QString BlameMark::toolTipText(const CommitInfo &info) const
 {
     QString result = QString(
+                         "<table cellspacing=\"10\"><tr>"
+                         "  <td><a href=\"blame\">Blame %1</a></td>"
+                         "  <td><a href=\"blameParent\">Blame Parent</a></td>"
+                         "  <td><a href=\"showFile\">File at %1</a></td>"
+                         "</tr></table>"
+                         "<p></p>"
                          "<table>"
-                         "  <tr><td>commit</td><td><a href>%1</a></td></tr>"
+                         "  <tr><td>commit</td><td><a href=\"show\">%1</a></td></tr>"
                          "  <tr><td>Author:</td><td>%2 &lt;%3&gt;</td></tr>"
                          "  <tr><td>Date:</td><td>%4</td></tr>"
                          "  <tr></tr>"
                          "  <tr><td colspan='2' align='left'>%5</td></tr>"
                          "</table>")
-                         .arg(info.sha1, info.author, info.authorMail,
+                         .arg(info.sha1.left(8), info.author, info.authorMail,
                               info.authorTime.toString("yyyy-MM-dd hh:mm:ss"), info.summary);
 
     if (settings().instantBlameIgnoreSpaceChanges()
@@ -186,12 +215,12 @@ void InstantBlame::setup()
 // committer-time 1613752312
 // committer-tz +0100
 // summary Add greeting to script
-// boundary
+// (boundary/previous f6b5868032a5dc0e73b82b09184086d784949646 oldfile)
 // filename foo
 //     echo Hello World!
 
 static CommitInfo parseBlameOutput(const QStringList &blame, const Utils::FilePath &filePath,
-                                   const Git::Internal::Author &author)
+                                   int line, const Git::Internal::Author &author)
 {
     CommitInfo result;
     if (blame.size() <= 12)
@@ -208,6 +237,12 @@ static CommitInfo parseBlameOutput(const QStringList &blame, const Utils::FilePa
     result.authorTime = QDateTime::fromSecsSinceEpoch(timeStamp);
     result.summary = blame.at(9).mid(8);
     result.filePath = filePath;
+    // blame.at(10) can be "boundary", "previous" or "filename"
+    if (blame.at(10).startsWith("filename"))
+        result.originalFileName = blame.at(10).mid(9);
+    else
+        result.originalFileName = blame.at(11).mid(9);
+    result.line = line;
     return result;
 }
 
@@ -287,7 +322,7 @@ void InstantBlame::perform()
             stop();
             return;
         }
-        const CommitInfo info = parseBlameOutput(output.split('\n'), filePath, m_author);
+        const CommitInfo info = parseBlameOutput(output.split('\n'), filePath, line, m_author);
         m_blameMark.reset(new BlameMark(filePath, line, info));
     };
     QStringList options = {"blame", "-p"};

src/plugins/git/instantblame.h

@@ -26,6 +26,8 @@ public:
     QDateTime authorTime;
     QString summary;
     Utils::FilePath filePath;
+    QString originalFileName; // relative file path from project root
+    int line = -1;
 };
 
 class BlameMark : public TextEditor::TextMark