api: add translated string in evaluation of expressions with "translate:xxx" (issue #1622)

src/core/wee-command.c

@@ -7571,9 +7571,10 @@ command_init ()
            "\"if:condition?value_if_true:value_if_false\")\n"
            "  17. result of an expression with parentheses and operators "
            "+ - * / // % ** (format: \"calc:xxx\")\n"
-           "  18. an option (format: \"file.section.option\")\n"
-           "  19. a local variable in buffer\n"
-           "  20. a hdata name/variable (the value is automatically converted "
+           "  18. a translated string (format: \"translate:xxx\")\n"
+           "  19. an option (format: \"file.section.option\")\n"
+           "  20. a local variable in buffer\n"
+           "  21. a hdata name/variable (the value is automatically converted "
            "to string), by default \"window\" and \"buffer\" point to current "
            "window/buffer.\n"
            "Format for hdata can be one of following:\n"
@@ -7617,6 +7618,7 @@ command_init ()
            "  /eval -n ${calc:(5+2)*3}                       ==> 21\n"
            "  /eval -n ${base_encode:64,test}                ==> dGVzdA==\n"
            "  /eval -n ${base_decode:64,dGVzdA==}            ==> test\n"
+           "  /eval -n ${translate:Plugin}                   ==> Extension\n"
            "\n"
            "Examples (conditions):\n"
            "  /eval -n -c ${window.buffer.number} > 2 ==> 0\n"

src/core/wee-eval.c

@@ -725,6 +725,25 @@ eval_string_if (const char *text, struct t_eval_context *eval_context)
     return (value) ? value : strdup ("");
 }
 
+/*
+ * Translates text.
+ *
+ * Note: result must be freed after use.
+ */
+
+char *
+eval_translate (const char *text)
+{
+    const char *ptr_string;
+
+    if (!text || !text[0])
+        return strdup ("");
+
+    ptr_string = gettext (text);
+
+    return strdup ((ptr_string) ? ptr_string : "");
+}
+
 /*
  * Gets value of hdata using "path" to a variable.
  *
@@ -1034,10 +1053,11 @@ end:
  *  18. an environment variable (format: env:XXX)
  *  19. a ternary operator (format: if:condition?value_if_true:value_if_false)
  *  20. calculate result of an expression (format: calc:xxx)
- *  21. an option (format: file.section.option)
- *  22. a buffer local variable
- *  23. a pointer name from hashtable "pointers"
- *  24. a hdata variable (format: hdata.var1.var2 or hdata[list].var1.var2
+ *  21. a translated string (format: translate:xxx)
+ *  22. an option (format: file.section.option)
+ *  23. a buffer local variable
+ *  24. a pointer name from hashtable "pointers"
+ *  25. a hdata variable (format: hdata.var1.var2 or hdata[list].var1.var2
  *                        or hdata[ptr].var1.var2 or hdata[ptr_name].var1.var2)
  *
  * See /help in WeeChat for examples.
@@ -1285,7 +1305,16 @@ eval_replace_vars_cb (void *data, const char *text)
         goto end;
     }
 
-    /* 21. option: if found, return this value */
+    /*
+     * 21. translated text
+     */
+    if (strncmp (text, "translate:", 10) == 0)
+    {
+        value = eval_translate (text + 10);
+        goto end;
+    }
+
+    /* 22. option: if found, return this value */
     if (strncmp (text, "sec.data.", 9) == 0)
     {
         ptr_value = hashtable_get (secure_hashtable_data, text + 9);
@@ -1328,7 +1357,7 @@ eval_replace_vars_cb (void *data, const char *text)
         }
     }
 
-    /* 22. local variable in buffer */
+    /* 23. local variable in buffer */
     ptr_buffer = hashtable_get (eval_context->pointers, "buffer");
     if (ptr_buffer)
     {
@@ -1340,7 +1369,7 @@ eval_replace_vars_cb (void *data, const char *text)
         }
     }
 
-    /* 23. hdata */
+    /* 24. hdata */
     value = eval_string_hdata (text, eval_context);
 
 end: