FakeVim: Don't overwrite document with ":!..." commands

Ignore range in ":!..." commands.

Task-number: QTCREATORBUG-7396
Change-Id: I428a403b105499024ed84c6253240e808b3cdcd8
Reviewed-by: hjk <hjk121@nokiamail.com>

src/plugins/fakevim/fakevimhandler.cpp

@@ -693,6 +693,33 @@ static void setClipboardData(const QString &content, RangeMode mode,
     clipboard->setMimeData(data, clipboardMode);
 }
 
+static QByteArray toLocalEncoding(const QString &text)
+{
+    return HostOsInfo::isWindowsHost() ? QString(text).replace(_("\n"), _("\r\n")).toLocal8Bit()
+                                       : text.toLocal8Bit();
+}
+
+static QString fromLocalEncoding(const QByteArray &data)
+{
+    return HostOsInfo::isWindowsHost() ? QString::fromLocal8Bit(data).replace(_("\n"), _("\r\n"))
+                                       : QString::fromLocal8Bit(data);
+}
+
+static QString getProcessOutput(const QString &command, const QString &input)
+{
+    QProcess proc;
+    proc.start(command);
+    proc.waitForStarted();
+    proc.write(toLocalEncoding(input));
+    proc.closeWriteChannel();
+
+    // FIXME: Process should be interruptable by user.
+    //        Solution is to create a QObject for each process and emit finished state.
+    proc.waitForFinished();
+
+    return fromLocalEncoding(proc.readAllStandardOutput());
+}
+
 static const QMap<QString, int> &vimKeyNames()
 {
     static QMap<QString, int> k;
@@ -804,6 +831,11 @@ QString Range::toString() const
         .arg(rangemode);
 }
 
+bool Range::isValid() const
+{
+    return beginPos >= 0 && endPos >= 0;
+}
+
 QDebug operator<<(QDebug ts, const Range &range)
 {
     return ts << '[' << range.beginPos << ',' << range.endPos << ']';
@@ -5038,9 +5070,6 @@ bool FakeVimHandler::Private::parseExCommmand(QString *line, ExCommand *cmd)
     if (line->isEmpty())
         return false;
 
-    // remove leading colons and spaces
-    line->remove(QRegExp(_("^\\s*(:+\\s*)*")));
-
     // parse range first
     if (!parseLineRange(line, cmd))
         return false;
@@ -5093,6 +5122,15 @@ bool FakeVimHandler::Private::parseExCommmand(QString *line, ExCommand *cmd)
 
 bool FakeVimHandler::Private::parseLineRange(QString *line, ExCommand *cmd)
 {
+    // remove leading colons and spaces
+    line->remove(QRegExp(_("^\\s*(:+\\s*)*")));
+
+    // special case ':!...' (use invalid range)
+    if (line->startsWith(QLatin1Char('!'))) {
+        cmd->range = Range();
+        return true;
+    }
+
     // FIXME: that seems to be different for %w and %s
     if (line->startsWith(QLatin1Char('%')))
         line->replace(0, 1, _("1,$"));
@@ -5655,22 +5693,15 @@ bool FakeVimHandler::Private::handleExBangCommand(const ExCommand &cmd) // :!
     if (!cmd.cmd.isEmpty() || !cmd.hasBang)
         return false;
 
-    setCurrentRange(cmd.range);
-    int targetPosition = firstPositionInLine(lineForPosition(cmd.range.beginPos));
-    QString command = QString(cmd.cmd.mid(1) + QLatin1Char(' ') + cmd.args).trimmed();
-    QString text = selectText(cmd.range);
-    QProcess proc;
-    proc.start(command);
-    proc.waitForStarted();
-    if (HostOsInfo::isWindowsHost())
-        text.replace(_("\n"), _("\r\n"));
-    proc.write(text.toUtf8());
-    proc.closeWriteChannel();
-    proc.waitForFinished();
-    QString result = QString::fromUtf8(proc.readAllStandardOutput());
-    if (text.isEmpty()) {
-        emit q->extraInformationChanged(result);
-    } else {
+    bool replaceText = cmd.range.isValid();
+    const QString command = QString(cmd.cmd.mid(1) + QLatin1Char(' ') + cmd.args).trimmed();
+    const QString input = replaceText ? selectText(cmd.range) : QString();
+
+    const QString result = getProcessOutput(command, input);
+
+    if (replaceText) {
+        setCurrentRange(cmd.range);
+        int targetPosition = firstPositionInLine(lineForPosition(cmd.range.beginPos));
         beginEditBlock();
         removeText(currentRange());
         insertText(result);
@@ -5679,8 +5710,11 @@ bool FakeVimHandler::Private::handleExBangCommand(const ExCommand &cmd) // :!
         leaveVisualMode();
         //qDebug() << "FILTER: " << command;
         showMessage(MessageInfo, FakeVimHandler::tr("%n lines filtered.", 0,
-            text.count(QLatin1Char('\n'))));
+            input.count(QLatin1Char('\n'))));
+    } else if (!result.isEmpty()) {
+        emit q->extraInformationChanged(result);
     }
+
     return true;
 }
 

src/plugins/fakevim/fakevimhandler.h

@@ -52,6 +52,7 @@ struct Range
     Range();
     Range(int b, int e, RangeMode m = RangeCharMode);
     QString toString() const;
+    bool isValid() const;
 
     int beginPos;
     int endPos;