Terminal now scrolls to bottom when a new process prints output

src/terminal.cpp

@@ -76,6 +76,7 @@ Terminal::Terminal() : Source::SearchView() {
 }
 
 int Terminal::process(const std::string &command, const boost::filesystem::path &path, bool use_pipes) {
+  perform_scroll_to_bottom = true;
   std::unique_ptr<TinyProcessLib::Process> process;
   if(use_pipes)
     process = std::make_unique<TinyProcessLib::Process>(command, path.string(), [this](const char *bytes, size_t n) {
@@ -95,6 +96,7 @@ int Terminal::process(const std::string &command, const boost::filesystem::path
 }
 
 int Terminal::process(std::istream &stdin_stream, std::ostream &stdout_stream, const std::string &command, const boost::filesystem::path &path, std::ostream *stderr_stream) {
+  perform_scroll_to_bottom = true;
   TinyProcessLib::Process process(command, path.string(), [&stdout_stream](const char *bytes, size_t n) {
     Glib::ustring umessage(std::string(bytes, n));
     Glib::ustring::iterator iter;
@@ -133,6 +135,7 @@ int Terminal::process(std::istream &stdin_stream, std::ostream &stdout_stream, c
 
 void Terminal::async_process(const std::string &command, const boost::filesystem::path &path, const std::function<void(int exit_status)> &callback, bool quiet) {
   std::thread async_execute_thread([this, command, path, callback, quiet]() {
+    perform_scroll_to_bottom = true;
     LockGuard lock(processes_mutex);
     stdin_buffer.clear();
     auto process = std::make_shared<TinyProcessLib::Process>(command, path.string(), [this, quiet](const char *bytes, size_t n) {
@@ -265,6 +268,10 @@ void Terminal::print(std::string message, bool bold) {
   if(auto parent = get_parent()) {
     if(!parent->is_visible())
       parent->show();
+
+    bool expected = true;
+    if(perform_scroll_to_bottom.compare_exchange_strong(expected, false) && scroll_to_bottom)
+      scroll_to_bottom();
   }
 
 #ifdef _WIN32

src/terminal.hpp

@@ -32,6 +32,8 @@ public:
 
   void clear();
 
+  std::function<void()> scroll_to_bottom;
+
 protected:
   bool on_motion_notify_event(GdkEventMotion *motion_event) override;
   bool on_button_press_event(GdkEventButton *button_event) override;
@@ -55,4 +57,6 @@ private:
   Mutex processes_mutex;
   std::vector<std::shared_ptr<TinyProcessLib::Process>> processes GUARDED_BY(processes_mutex);
   Glib::ustring stdin_buffer;
+
+  std::atomic<bool> perform_scroll_to_bottom = {false};
 };

src/window.cpp

@@ -1794,12 +1794,15 @@ void Window::add_widgets() {
     if(adjustment->get_value() == adjustment->get_upper() - adjustment->get_page_size()) // If for instance the terminal has been cleared
       *scrolled_to_bottom = true;
   });
-  Terminal::get().signal_size_allocate().connect([this, scrolled_to_bottom](Gtk::Allocation &allocation) mutable {
+  Terminal::get().scroll_to_bottom = [this, scrolled_to_bottom] {
+    auto adjustment = terminal_scrolled_window.get_vadjustment();
+    adjustment->set_value(adjustment->get_upper() - adjustment->get_page_size());
+    *scrolled_to_bottom = true;
+    Terminal::get().queue_draw();
+  };
+  Terminal::get().signal_size_allocate().connect([scrolled_to_bottom](Gtk::Allocation & /*allocation*/) {
     if(*scrolled_to_bottom) {
-      auto adjustment = terminal_scrolled_window.get_vadjustment();
+      Terminal::get().scroll_to_bottom();
-      adjustment->set_value(adjustment->get_upper() - adjustment->get_page_size());
-      *scrolled_to_bottom = true;
-      Terminal::get().queue_draw();
     }
   });