allow lua to clear the textbuffer

corescripts/_global.lua

@@ -1,25 +1,22 @@
 --[[ utility functions ]]--
 
-function _el(name)
-    return function(args)
-        return { name, args }
-    end
-end
-
-t = _el("t")
+--
 
 --[[ page module ]]--
 
 page = {}
 
-function page.Commit(content)
-    --__ext_pageview_clear()
+function page.Set(text)
+    __ext_pageview_set_content(text)
+end
+
+function page.Append(content)
     for i, v in pairs(content) do
-        -- tag_name = v[1]
-        -- tag_props = v[2]
-
-        print(v[1], v[2])
-
-        __ext_pageview_append_tag(v[1], v[2])
+        __ext_pageview_append_tag("t", v[1] or v)
     end
 end
+
+function page.Commit(content)
+    page.Set("")
+    page.Append(content)
+end

lua.c

@@ -39,7 +39,13 @@ int lua_init_state(lua_State* L, struct application_state* state) {
         return 0;
     }
 
+    int pageview_set_content(lua_State* L) {
+        const char* new_content = luaL_checkstring(L, 1);
+        page_application_text_buffer_set_text(state, new_content);
+    }
+
     lua_create_c_function(L, "__ext_pageview_append_tag", pageview_append_tag);
+    lua_create_c_function(L, "__ext_pageview_set_content", pageview_set_content);
 
     status = lua_pcall_file(L, "corescripts/_global.lua");
     if (status != 0) return 1;

main.c

@@ -12,7 +12,8 @@ static void activate(GtkApplication* app, struct application_state* state) {
     page_application_init(state);
     int status = lua_init_state(state->L, state);
     if (status != 0) {
-        printf("error: lua_init_state failed with non-zero error code %d\n", status);
+        fprintf(stderr, "error: lua_init_state failed with non-zero error code %d\n", status);
+        return;
     }
     page_application_show(state);
     lua_close(state->L);

pages/test.lua

@@ -1,8 +1,3 @@
-function Home()
-    return {
-        t("Hello"),
-        t(" wow")
+page.Commit{
+    "yeah"
 }
-end
-
-page.Commit(Home())

ui.c

@@ -36,3 +36,7 @@ void page_application_text_buffer_append_text(struct application_state* state, c
     gtk_text_buffer_get_end_iter(GTK_TEXT_BUFFER(state->pageview_buffer), &iter);
     gtk_text_buffer_insert(GTK_TEXT_BUFFER(state->pageview_buffer), &iter, display_text, -1);
 }
+
+void page_application_text_buffer_set_text(struct application_state* state, const char* text) {
+    gtk_text_buffer_set_text(state->pageview_buffer, text, -1);
+}

ui.h

@@ -18,5 +18,6 @@ struct application_state* page_application_new();
 void page_application_init(struct application_state* state);
 void page_application_show(struct application_state* state);
 void page_application_text_buffer_append_text(struct application_state* state, const char* display_text);
+void page_application_text_buffer_set_text(struct application_state* state, const char* text);
 
 #endif