Evas: Add API to reinit the language and use it in elementary.

Summary:
evas_common_language_from_locale_* functions kept static pointers
inside of its functions. Once these function was called, it was never reset.
It made big problems for harfbuzz and hyphenation. Also, Elementary
provides elm_language_set() API. Then we need to support it fully.
@fix

Test Plan: Test case for hyphenation is included in Evas test suite.

Reviewers: raster, tasn, herdsman, woohyun, z-wony, Blackmole, minudf

Subscribers: cedric, jpeg

Differential Revision: https://phab.enlightenment.org/D3864

2 files changed, 16 insertions, 6 deletions

diff --git a/src/lib/evas/common/language/evas_language_utils.c b/src/lib/evas/common/language/evas_language_utils.c
index 19638d528d..f8b38b6abd 100644
--- a/src/lib/evas/common/language/evas_language_utils.c
+++ b/src/lib/evas/common/language/evas_language_utils.c
@@ -45,6 +45,9 @@
 #define EXPLICIT_SCRIPT(script) \
    (((script) != EVAS_SCRIPT_UNKNOWN) && ((script) > EVAS_SCRIPT_INHERITED))
 
+static char lang[6]; /* FIXME: Maximum length I know about */
+static char lang_full[32];
+
 static Evas_Script_Type
 _evas_common_language_char_script_search(Eina_Unicode unicode)
 {
@@ -135,7 +138,6 @@ evas_common_language_script_type_get(const Eina_Unicode *str, size_t len)
 const char *
 evas_common_language_from_locale_get(void)
 {
-   static char lang[6]; /* FIXME: Maximum length I know about */
    if (*lang) return lang;
 
    const char *locale;
@@ -163,8 +165,7 @@ evas_common_language_from_locale_get(void)
 const char *
 evas_common_language_from_locale_full_get(void)
 {
-   static char lang[32];
-   if (*lang) return lang;
+   if (*lang_full) return lang_full;
 
    const char *locale;
    locale = setlocale(LC_MESSAGES, NULL);
@@ -177,14 +178,20 @@ evas_common_language_from_locale_full_get(void)
              if ((c == '.') || (c == '@') || (c == ' ')) /* Looks like en_US.UTF8 or de_DE@euro or aa_ER UTF-8*/
                 break;
           }
-        strncpy(lang, locale, i);
-        lang[i] = '\0';
-        return lang;
+        strncpy(lang_full, locale, i);
+        lang_full[i] = '\0';
+        return lang_full;
      }
 
    return "";
 }
 
+void
+evas_common_language_reinit(void)
+{
+   *lang = *lang_full = '\0';
+}
+
 /*
  * @}
  */
diff --git a/src/lib/evas/common/language/evas_language_utils.h b/src/lib/evas/common/language/evas_language_utils.h
index 5e249121fd..8c7529a572 100644
--- a/src/lib/evas/common/language/evas_language_utils.h
+++ b/src/lib/evas/common/language/evas_language_utils.h
@@ -131,5 +131,8 @@ evas_common_language_from_locale_get(void);
 
 const char *
 evas_common_language_from_locale_full_get(void);
+
+void
+evas_common_language_reinit(void);
 #endif