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Description: install a message handler for Qt
If the QT_MESSAGE_PATTERN envvar is set (i.e. the user has defined
their own log pattern), just skip loglevel debug messages unless
running in debug mode. Otherwise (default), format messages in the
Debian-præfixed style and with file/function/line number.
Author: mirabilos <tg@debian.org>
Forwarded: no
--- a/mscore/musescore.cpp
+++ b/mscore/musescore.cpp
@@ -2843,6 +2843,104 @@ static void mscoreMessageHandler(QtMsgTy
abort();
}
}
+#else
+// helper
+static void
+mudeb_debmsgout(const void *s_)
+{
+ const unsigned char *s;
+ unsigned char c;
+
+ s = (const unsigned char *)s_;
+ if (!s || !*s) {
+ fputs("(nil)\n", stderr);
+ return;
+ }
+ do {
+ c = *s++;
+ putc(c, stderr);
+ if (c == '\n' && *s) {
+ putc('N', stderr);
+ putc(':', stderr);
+ putc(' ', stderr);
+ }
+ } while (*s);
+ if (c != '\n')
+ putc('\n', stderr);
+}
+
+// by default; Debian loglevel præficēs, file/func/line, silence debug unless enabled
+static void
+mudeb_debmsghandler(QtMsgType type, const QMessageLogContext &ctx, const QString &msg)
+{
+ QString s;
+ bool needsp;
+
+ switch (type) {
+ case QtDebugMsg:
+ if (!MScore::debugMode)
+ return;
+ putc('D', stderr);
+ break;
+ case QtWarningMsg:
+ putc('W', stderr);
+ break;
+ case QtCriticalMsg:
+ case QtFatalMsg:
+ putc('E', stderr);
+ break;
+ default:
+ putc('I', stderr);
+ }
+ putc(':', stderr);
+ if (ctx.category && strcmp(ctx.category, "default") != 0) {
+ putc(' ', stderr);
+ putc('<', stderr);
+ fputs(ctx.category, stderr);
+ putc('>', stderr);
+ }
+ needsp = true;
+ if (ctx.file) {
+ if (needsp) {
+ putc(' ', stderr);
+ needsp = false;
+ }
+ fputs(ctx.file, stderr);
+ }
+ if (ctx.function) {
+ if (needsp) {
+ putc(' ', stderr);
+ needsp = false;
+ }
+ putc('{', stderr);
+ fputs(ctx.function, stderr);
+ putc('}', stderr);
+ }
+ if (ctx.line && (ctx.file || ctx.function))
+ fprintf(stderr, ":%d", ctx.line);
+ if (!needsp)
+ putc(':', stderr);
+ putc(' ', stderr);
+ mudeb_debmsgout(qPrintable(msg));
+ fflush(stderr);
+}
+
+#if QT_VERSION >= QT_VERSION_CHECK(5, 4, 0)
+// if QT_MESSAGE_PATTERN is set: silence debug unless enabled
+static void
+mudeb_qtmsghandler(QtMsgType type, const QMessageLogContext &ctx, const QString &msg)
+{
+ if (type == QtDebugMsg && !MScore::debugMode)
+ return;
+
+ QString s = qFormatLogMessage(type, ctx, msg);
+ if (s.isNull())
+ return;
+ fputs(qPrintable(s), stderr);
+ putc('\n', stderr);
+ fflush(stderr);
+}
+#endif
#endif
//---------------------------------------------------------
@@ -5769,8 +5867,14 @@ int main(int argc, char* av[])
QApplication::setDesktopSettingsAware(true);
#if defined(QT_DEBUG) && defined(Q_OS_WIN)
MScore::msgHandler = mscoreMessageHandler;
- qInstallMessageHandler(mscoreMessageHandler);
+#else
+ MScore::msgHandler = mudeb_debmsghandler;
+#if QT_VERSION >= QT_VERSION_CHECK(5, 4, 0)
+ if (getenv("QT_MESSAGE_PATTERN") != NULL)
+ MScore::msgHandler = mudeb_qtmsghandler;
+#endif
#endif
+ qInstallMessageHandler(MScore::msgHandler);
QFile f(":/revision.h");
f.open(QIODevice::ReadOnly);
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