Added in explicit touchscreen keyboard support. (#1389)

data/core/commandview.lua

@@ -84,6 +84,11 @@ function CommandView:get_line_screen_position(line, col)
 end
 
 
+function CommandView:supports_text_input()
+  return true
+end
+
+
 function CommandView:get_scrollable_size()
   return 0
 end

data/core/docview.lua

@@ -252,6 +252,11 @@ function DocView:scroll_to_line(line, ignore_if_visible, instant)
 end
 
 
+function DocView:supports_text_input()
+  return true
+end
+
+
 function DocView:scroll_to_make_visible(line, col)
   local ox, oy = self:get_content_offset()
   local _, ly = self:get_line_screen_position(line, col)

data/core/init.lua

@@ -1105,6 +1105,7 @@ function core.set_active_view(view)
   -- Reset the IME even if the focus didn't change
   ime.stop()
   if view ~= core.active_view then
+    system.text_input(view:supports_text_input())
     if core.active_view and core.active_view.force_focus then
       core.next_active_view = view
       return

data/core/view.lua

@@ -108,6 +108,10 @@ function View:get_h_scrollable_size()
 end
 
 
+function View:supports_text_input()
+  return false
+end
+
 ---@param x number
 ---@param y number
 ---@return boolean

src/api/system.c

@@ -966,7 +966,7 @@ static int f_library_gc(lua_State *L) {
   lua_getfield(L, 1, "handle");
   void* handle = lua_touserdata(L, -1);
   SDL_UnloadObject(handle);
-  
+
   return 0;
 }
 
@@ -1069,6 +1069,15 @@ static int f_path_compare(lua_State *L) {
 }
 
 
+static int f_text_input(lua_State* L) {
+  if (lua_toboolean(L, 1))
+    SDL_StartTextInput();
+  else
+    SDL_StopTextInput();
+  return 0;
+}
+
+
 static const luaL_Reg lib[] = {
   { "poll_event",          f_poll_event          },
   { "wait_event",          f_wait_event          },
@@ -1102,12 +1111,13 @@ static const luaL_Reg lib[] = {
   { "load_native_plugin",  f_load_native_plugin  },
   { "path_compare",        f_path_compare        },
   { "get_fs_type",         f_get_fs_type         },
+  { "text_input",          f_text_input          },
   { NULL, NULL }
 };
 
 
 int luaopen_system(lua_State *L) {
-  luaL_newmetatable(L, API_TYPE_NATIVE_PLUGIN); 
+  luaL_newmetatable(L, API_TYPE_NATIVE_PLUGIN);
   lua_pushcfunction(L, f_library_gc);
   lua_setfield(L, -2, "__gc");
   luaL_newlib(L, lib);

src/main.c

@@ -212,6 +212,8 @@ init_lua:
     set_macos_bundle_resources(L);
   #endif
 #endif
+  SDL_EventState(SDL_TEXTINPUT, SDL_ENABLE);
+  SDL_EventState(SDL_TEXTEDITING, SDL_ENABLE);
 
   const char *init_lite_code = \
     "local core\n"