evas textblock: update format nodes when a Evas Textblock Style is updated

Summary:
A style tag among a text has to be replcaed by its matched tag when
a format node is created. If the matched tag is changed, format nodes
should be updated.
But, if a style text for Evas Textblock Style is changed,
related format nodes are not updated without setting new text.
The patch changes to update format nodes when new style text is set.
@fix

Test Plan: Included in Evas Test Suite.

Reviewers: raster, tasn, herdsman, subodh6129, zmike

Subscribers: zmike, cedric, z-wony, Blackmole

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D4697

Committer's note: rebased.

src/lib/evas/canvas/evas_object_textblock.c

@@ -766,6 +766,7 @@ static Eina_Bool _evas_textblock_cursor_format_is_visible_get(const Efl_Text_Cur
 static void _evas_textblock_cursor_at_format_set(Efl_Text_Cursor_Cursor *cur, const Evas_Object_Textblock_Node_Format *fmt);
 static void _evas_textblock_cursor_init(Efl_Text_Cursor_Cursor *cur, const Evas_Object *tb);
 static Evas_Filter_Program *_format_filter_program_get(Efl_Canvas_Text_Data *o, Evas_Object_Textblock_Format *fmt);
+static const char *_textblock_format_node_from_style_tag(Efl_Canvas_Text_Data *o, Evas_Object_Textblock_Node_Format *fnode, const char *format, size_t format_len);
 #ifdef HAVE_HYPHEN
 /* Hyphenation */
 #include "evas_textblock_hyphenation.x"
@@ -6954,6 +6955,47 @@ evas_textblock_style_free(Evas_Textblock_Style *ts)
    free(ts);
 }
 
+static void
+_evas_textblock_update_format_nodes_from_style_tag(Efl_Canvas_Text_Data *o)
+{
+   Evas_Object_Textblock_Node_Format *fnode = o->format_nodes;
+
+   if (!o)
+     {
+        ERR("The given address Efl_Canvas_Text_Data is NULL");
+        return;
+     }
+
+   while (fnode)
+     {
+        const char *match;
+        size_t format_len = eina_stringshare_strlen(fnode->orig_format);
+        /* Is this safe to use alloca here? Strings might possibly get large */
+
+        if (fnode->own_closer &&
+            (format_len > 0) && (fnode->orig_format[format_len - 1] == '/'))
+          {
+             format_len--;
+          }
+
+        match = _textblock_format_node_from_style_tag(o, fnode, fnode->orig_format,
+                                                      format_len);
+
+        if (match && fnode->format && strcmp(match, fnode->format))
+          {
+             if ((*match == '+') || (*match == '-'))
+               {
+                  match++;
+                  while (*match == ' ') match++;
+               }
+             fnode->is_new = EINA_TRUE;
+             eina_stringshare_replace(&fnode->format, match);
+          }
+
+        fnode = _NODE_FORMAT(EINA_INLIST_GET(fnode)->next);
+     }
+}
+
 EAPI void
 evas_textblock_style_set(Evas_Textblock_Style *ts, const char *text)
 {
@@ -6968,11 +7010,8 @@ evas_textblock_style_set(Evas_Textblock_Style *ts, const char *text)
 
    EINA_LIST_FOREACH(ts->objects, l, eo_obj)
      {
-        Efl_Canvas_Text_Data *o = efl_data_scope_get(eo_obj, MY_CLASS);
         Evas_Object_Protected_Data *obj = efl_data_scope_get(eo_obj, EFL_CANVAS_OBJECT_CLASS);
         evas_object_async_block(obj);
-        _evas_textblock_invalidate_all(o);
-        _evas_textblock_changed(o, eo_obj);
      }
 
    _style_replace(ts, text);
@@ -7095,6 +7134,14 @@ evas_textblock_style_set(Evas_Textblock_Style *ts, const char *text)
              p++;
           }
      }
+
+   EINA_LIST_FOREACH(ts->objects, l, eo_obj)
+     {
+        Efl_Canvas_Text_Data *o = efl_data_scope_get(eo_obj, MY_CLASS);
+        _evas_textblock_update_format_nodes_from_style_tag(o);
+        _evas_textblock_invalidate_all(o);
+        _evas_textblock_changed(o, eo_obj);
+     }
 }
 
 EAPI const char *
@@ -7167,34 +7214,7 @@ _textblock_style_generic_set(Evas_Object *eo_obj, Evas_Textblock_Style *ts,
      }
    *obj_ts = ts;
 
-   Evas_Object_Textblock_Node_Format *fnode = o->format_nodes;
-   while (fnode)
-     {
-        const char *match;
-        size_t format_len = eina_stringshare_strlen(fnode->orig_format);
-        /* Is this safe to use alloca here? Strings might possibly get large */
-
-        if (fnode->own_closer &&
-           (format_len > 0) && (fnode->orig_format[format_len - 1] == '/'))
-          {
-             format_len--;
-          }
-
-        match = _textblock_format_node_from_style_tag(o, fnode, fnode->orig_format,
-              format_len);
-
-        if (match && fnode->format && strcmp(match, fnode->format))
-          {
-             if ((*match == '+') || (*match == '-'))
-               {
-                  match++;
-                  while (*match == ' ') match++;
-               }
-             fnode->is_new = EINA_TRUE;
-             eina_stringshare_replace(&fnode->format, match);
-          }
-        fnode = _NODE_FORMAT(EINA_INLIST_GET(fnode)->next);
-     }
+   _evas_textblock_update_format_nodes_from_style_tag(o);
 
    o->format_changed = EINA_TRUE;
    _evas_textblock_invalidate_all(o);

src/tests/evas/evas_test_textblock.c

@@ -3702,6 +3702,16 @@ EFL_START_TEST(evas_textblock_style)
    evas_object_textblock_size_formatted_get(tb, &nw, &nh);
    ck_assert_int_eq(nw, bw);
 
+   evas_textblock_style_set(newst, "DEFAULT='font=Sans font_size=30'small_size='+ font_size=10'");
+   evas_object_textblock_text_markup_set(tb, "Test <small_size>SMALL</small_size>");
+   evas_object_textblock_size_formatted_get(tb, &w, &h);
+   ck_assert_int_gt(w, 0);
+   ck_assert_int_gt(h, 0);
+
+   evas_textblock_style_set(newst, "DEFAULT='font=Sans font_size=30'small_size='+font_size=50'");
+   evas_object_textblock_size_formatted_get(tb, &nw, &nh);
+   ck_assert_int_gt(nw, w);
+   ck_assert_int_gt(nh, h);
 
    END_TB_TEST();
 }