FEAT(client): Add shortcut to send plain text messages

Add the ability to press Ctrl+Enter to send a plain text message while
preserving line breaks. This adds an easy way of preserving messages
with line breaks without having to resort to using Markdown.

Implements #5707

4 files changed, 25 insertions, 8 deletions

diff --git a/src/mumble/CustomElements.cpp b/src/mumble/CustomElements.cpp
index 085da4c82..43b1d033d 100644
--- a/src/mumble/CustomElements.cpp
+++ b/src/mumble/CustomElements.cpp
@@ -237,7 +237,11 @@ bool ChatbarTextEdit::event(QEvent *evt) {
 			const QString msg = toPlainText();
 			if (!msg.isEmpty()) {
 				addToHistory(msg);
-				emit entered(msg);
+				if (kev->modifiers() & Qt::ControlModifier) {
+					emit ctrlEnterPressed(msg);
+				} else {
+					emit entered(msg);
+				}
 			}
 			return true;
 		}
diff --git a/src/mumble/CustomElements.h b/src/mumble/CustomElements.h
index dcbd63ab6..0de30fbb3 100644
--- a/src/mumble/CustomElements.h
+++ b/src/mumble/CustomElements.h
@@ -63,6 +63,7 @@ signals:
 	void backtabPressed(void);
 	void ctrlSpacePressed(void);
 	void entered(QString);
+	void ctrlEnterPressed(QString);
 	void pastedImage(QString);
 public slots:
 	void pasteAndSend_triggered();
diff --git a/src/mumble/MainWindow.cpp b/src/mumble/MainWindow.cpp
index 2019fb924..cec90ccbc 100644
--- a/src/mumble/MainWindow.cpp
+++ b/src/mumble/MainWindow.cpp
@@ -167,6 +167,7 @@ MainWindow::MainWindow(QWidget *p) : QMainWindow(p) {
 	connect(qmChannel, SIGNAL(aboutToShow()), this, SLOT(qmChannel_aboutToShow()));
 	connect(qmListener, SIGNAL(aboutToShow()), this, SLOT(qmListener_aboutToShow()));
 	connect(qteChat, SIGNAL(entered(QString)), this, SLOT(sendChatbarText(QString)));
+	connect(qteChat, &ChatbarTextEdit::ctrlEnterPressed, [this](const QString &msg) { sendChatbarText(msg, true); });
 	connect(qteChat, SIGNAL(pastedImage(QString)), this, SLOT(sendChatbarMessage(QString)));
 
 	// Tray
@@ -2062,12 +2063,23 @@ void MainWindow::on_qaQuit_triggered() {
 	this->close();
 }
 
-void MainWindow::sendChatbarText(QString qsText) {
-	// Markdown::markdownToHTML also takes care of replacing line breaks (\n) with the respective
-	// HTML code <br/>. Therefore if Markdown support is ever going to be removed from this
-	// function, this job has to be done explicitly as otherwise line breaks won't be shown on
-	// the receiving end of this text message.
-	qsText = Markdown::markdownToHTML(qsText);
+void MainWindow::sendChatbarText(QString qsText, bool plainText) {
+	if (plainText) {
+		// Escape HTML, unify line endings, then convert spaces to non-breaking ones to prevent multiple
+		// simultaneous ones from being collapsed into one (as a normal HTML renderer does).
+		qsText = qsText.toHtmlEscaped()
+					 .replace("\r\n", "\n")
+					 .replace("\r", "\n")
+					 .replace("\n", "<br>")
+					 .replace(" ", "&nbsp;");
+	} else {
+		// Markdown::markdownToHTML also takes care of replacing line breaks (\n) with the respective
+		// HTML code <br/>. Therefore if Markdown support is ever going to be removed from this
+		// function, this job has to be done explicitly as otherwise line breaks won't be shown on
+		// the receiving end of this text message.
+		qsText = Markdown::markdownToHTML(qsText);
+	}
+
 	sendChatbarMessage(qsText);
 
 	qteChat->clear();
diff --git a/src/mumble/MainWindow.h b/src/mumble/MainWindow.h
index 00eb98e19..292aac84e 100644
--- a/src/mumble/MainWindow.h
+++ b/src/mumble/MainWindow.h
@@ -313,7 +313,7 @@ public slots:
 	void destroyUserInformation();
 	void trayAboutToShow();
 	void sendChatbarMessage(QString msg);
-	void sendChatbarText(QString msg);
+	void sendChatbarText(QString msg, bool plainText = false);
 	void pttReleased();
 	void whisperReleased(QVariant scdata);
 	void onResetAudio();