Add Modal InfoStyle used for bufer reload info box

Modal info style wont be replaced by other info boxes.
NCursesUI will center that info box.

Fixes #1060

src/client.cc

@@ -287,7 +287,7 @@ void Client::close_buffer_reload_dialog()
 {
     kak_assert(m_buffer_reload_dialog_opened);
     m_buffer_reload_dialog_opened = false;
-    info_hide();
+    info_hide(true);
     m_input_handler.reset_normal_mode();
 }
 
@@ -311,7 +311,7 @@ void Client::check_if_buffer_needs_reloading()
         info_show(format("reload '{}' ?", bufname),
                   format("'{}' was modified externally\n"
                          "press <ret> or y to reload, <esc> or n to keep",
-                         bufname), {}, InfoStyle::Prompt);
+                         bufname), {}, InfoStyle::Modal);
 
         m_buffer_reload_dialog_opened = true;
         m_input_handler.on_next_key(KeymapMode::None, [this](Key key, Context&){ on_buffer_reload_key(key); });
@@ -360,13 +360,19 @@ void Client::menu_hide()
 
 void Client::info_show(String title, String content, BufferCoord anchor, InfoStyle style)
 {
+    if (m_info.style == InfoStyle::Modal) // We already have a modal info opened, do not touch it.
+        return;
+
     m_info = Info{ std::move(title), std::move(content), anchor, {}, style };
     m_ui_pending |= InfoShow;
     m_ui_pending &= ~InfoHide;
 }
 
-void Client::info_hide()
+void Client::info_hide(bool even_modal)
 {
+    if (not even_modal and m_info.style == InfoStyle::Modal)
+        return;
+
     m_info = Info{};
     m_ui_pending |= InfoHide;
     m_ui_pending &= ~InfoShow;

src/client.hh

@@ -41,7 +41,7 @@ public:
     void menu_hide();
 
     void info_show(String title, String content, BufferCoord anchor, InfoStyle style);
-    void info_hide();
+    void info_hide(bool even_modal = false);
 
     void print_status(DisplayLine status_line, bool immediate = false);
 

src/json_ui.cc

@@ -137,6 +137,7 @@ String to_json(InfoStyle style)
         case InfoStyle::InlineAbove: return R"("inlineAbove")";
         case InfoStyle::InlineBelow: return R"("inlineBelow")";
         case InfoStyle::MenuDoc: return R"("menuDoc")";
+        case InfoStyle::Modal: return R"("modal")";
     }
     return "";
 }

src/ncurses_ui.cc

@@ -893,6 +893,9 @@ void NCursesUI::info_show(StringView title, StringView content,
         anchor = DisplayCoord{m_status_on_top ? 0 : m_dimensions.line,
                            m_dimensions.column-1};
     }
+    else if (style == InfoStyle::Modal)
+        info_box = make_info_box(m_info.title, m_info.content,
+                                 m_dimensions.column, {});
     else
     {
         if (m_status_on_top)
@@ -913,6 +916,11 @@ void NCursesUI::info_show(StringView title, StringView content,
     const Rect rect = {m_status_on_top ? 1_line : 0_line, m_dimensions};
     if (style == InfoStyle::MenuDoc and m_menu)
         pos = m_menu.pos + DisplayCoord{0_line, m_menu.size.column};
+    else if (style == InfoStyle::Modal)
+    {
+        auto half = [](const DisplayCoord& c) { return DisplayCoord{c.line / 2, c.column / 2}; };
+        pos = rect.pos + half(rect.size) - half(size);
+    }
     else
         pos = compute_pos(anchor, size, rect, m_menu, style == InfoStyle::InlineAbove);
 

src/user_interface.hh

@@ -28,7 +28,8 @@ enum class InfoStyle
     Inline,
     InlineAbove,
     InlineBelow,
-    MenuDoc
+    MenuDoc,
+    Modal
 };
 
 enum class EventMode;