Elm entry: changed elm_entry_text_set to set the text with an idler.

The text is split to chunks and then appended from an idler. This makes
the entry very responsive and smooth even with very long texts.

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/elementary@59408 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33

diff --git a/src/lib/elm_entry.c b/src/lib/elm_entry.c
index d9b4f18..fb7c5ce 100644 (file)
--- a/src/lib/elm_entry.c
+++ b/src/lib/elm_entry.c
@@ -93,6 +93,12 @@
  * "anchor,clicked" - The anchor has been clicked
  */
 
+/* Maximum chunk size to be inserted to the entry at once
+ * FIXME: This size is arbitrary, should probably choose a better size.
+ * Possibly also find a way to set it to a low value for weak computers,
+ * and to a big value for better computers. */
+#define _CHUNK_SIZE 10000
+
 typedef struct _Mod_Api Mod_Api;
 
 typedef struct _Widget_Data Widget_Data;
@@ -109,6 +115,11 @@ struct _Widget_Data
    Ecore_Event_Handler *sel_clear_handler;
    Ecore_Timer *longpress_timer;
    Ecore_Timer *delay_write;
+   /* for deferred appending */
+   Ecore_Idler *append_text_idler;
+   char *append_text_left;
+   int append_text_position;
+   int append_text_len;
    /* Only for clipboard */
    const char *cut_sel;
    const char *text;
@@ -509,6 +520,13 @@ _del_hook(Evas_Object *obj)
    if (wd->cut_sel) eina_stringshare_del(wd->cut_sel);
    if (wd->text) eina_stringshare_del(wd->text);
    if (wd->deferred_recalc_job) ecore_job_del(wd->deferred_recalc_job);
+   if (wd->append_text_idler)
+     {
+        ecore_idler_del(wd->append_text_idler);
+        free(wd->append_text_left);
+        wd->append_text_left = NULL;
+        wd->append_text_idler = NULL;
+     }
    if (wd->longpress_timer) ecore_timer_del(wd->longpress_timer);
    EINA_LIST_FREE(wd->items, it)
      {
@@ -1558,6 +1576,56 @@ _text_filter(void *data, Evas_Object *edje __UNUSED__, const char *part __UNUSED
      }
 }
 
+/* This function is used to insert text by chunks in jobs */
+static Eina_Bool
+_text_append_idler(void *data)
+{
+   int start;
+   char backup;
+   Evas_Object *obj = (Evas_Object *) data;
+   Widget_Data *wd = elm_widget_data_get(obj);
+   if (wd->text) eina_stringshare_del(wd->text);
+   wd->text = NULL;
+   wd->changed = EINA_TRUE;
+
+   start = wd->append_text_position;
+   if(start + _CHUNK_SIZE < wd->append_text_len)
+     {
+        wd->append_text_position = (start + _CHUNK_SIZE);
+        /* Go to the start of the nearest codepoint, because we don't want
+         * to cut it in the middle */
+        eina_unicode_utf8_get_prev(wd->append_text_left,
+              &wd->append_text_position);
+     }
+   else
+     {
+        wd->append_text_position = wd->append_text_len;
+     }
+
+   backup = wd->append_text_left[wd->append_text_position];
+   wd->append_text_left[wd->append_text_position] = '\0';
+
+   edje_object_part_text_append(wd->ent, "elm.text",
+         wd->append_text_left + start);
+
+   wd->append_text_left[wd->append_text_position] = backup;
+
+   _sizing_eval(obj);
+
+   /* If there's still more to go, renew the idler, else, cleanup */
+   if (wd->append_text_position < wd->append_text_len)
+     {
+        return ECORE_CALLBACK_RENEW;
+     }
+   else
+     {
+        free(wd->append_text_left);
+        wd->append_text_left = NULL;
+        wd->append_text_idler = NULL;
+        return ECORE_CALLBACK_CANCEL;
+     }
+}
+
 /**
  * This adds an entry to @p parent object.
  *
@@ -1778,15 +1846,40 @@ elm_entry_password_get(const Evas_Object *obj)
 EAPI void
 elm_entry_entry_set(Evas_Object *obj, const char *entry)
 {
+   int len = 0;
    ELM_CHECK_WIDTYPE(obj, widtype);
    Widget_Data *wd = elm_widget_data_get(obj);
    if (!wd) return;
    if (!entry) entry = "";
-   edje_object_part_text_set(wd->ent, "elm.text", entry);
    if (wd->text) eina_stringshare_del(wd->text);
    wd->text = NULL;
    wd->changed = EINA_TRUE;
-   _sizing_eval(obj);
+
+   /* Clear currently pending job if there is one */
+   if (wd->append_text_idler)
+     {
+        ecore_idler_del(wd->append_text_idler);
+        free(wd->append_text_left);
+        wd->append_text_left = NULL;
+        wd->append_text_idler = NULL;
+     }
+
+   len = strlen(entry);
+   /* Split to ~_CHUNK_SIZE chunks */
+   if (len <= _CHUNK_SIZE)
+     {
+        edje_object_part_text_set(wd->ent, "elm.text", entry);
+        _sizing_eval(obj);
+     }
+   else
+     {
+        /* Need to clear the entry first */
+        edje_object_part_text_set(wd->ent, "elm.text", "");
+        wd->append_text_left = strndup(entry, len);
+        wd->append_text_position = 0;
+        wd->append_text_len = len;
+        wd->append_text_idler = ecore_idler_add(_text_append_idler, obj);
+     }
 }
 
 /**