From c4d60f326a5b7641bc5e9ddc8799ec91bac715d4 Mon Sep 17 00:00:00 2001
From: Jaehyun Cho <jae_hyun.cho@samsung.com>
Date: Wed, 23 Nov 2016 15:53:15 +0900
Subject: [PATCH] syntax_indent: Insert spaces by tab key.

Previously, tab key causes that both spaces for indent and spaces for
tab are inserted.
Now, tab key causes that either spaces for indent or spaces for tab are
inserted.

If paragraph is shorter than spaces for indent then only spaces for
indent are inserted. Otherwise, only spaces for tab are inserted.
---
 src/lib/syntax_indent.c | 74 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)

diff --git a/src/lib/syntax_indent.c b/src/lib/syntax_indent.c
index f040c43..176e643 100644
--- a/src/lib/syntax_indent.c
+++ b/src/lib/syntax_indent.c
@@ -94,6 +94,75 @@ indent_insert_br_case(indent_data *id)
    elm_entry_entry_insert(entry, p);
 }
 
+static void
+indent_insert_tab_case(indent_data *id)
+{
+   Evas_Object *entry = id->entry;
+   Evas_Object *tb = elm_entry_textblock_get(entry);
+   Evas_Textblock_Cursor *cur_orig = evas_object_textblock_cursor_get(tb);
+   Evas_Textblock_Cursor *cur = evas_object_textblock_cursor_new(tb);
+   char *utf8 = NULL;
+   int utf8_len = 0;
+   char *p = NULL;
+   Eina_Bool insert_indent_space = EINA_FALSE;
+
+   //Remove inserted "<tab/>".
+   evas_textblock_cursor_pos_set(cur, evas_textblock_cursor_pos_get(cur_orig));
+   evas_textblock_cursor_char_prev(cur);
+   if (!strncmp(evas_textblock_cursor_content_get(cur), TAB, TAB_LEN))
+     {
+        //Cancel added "<tab/>" from redoundo.
+        redoundo_n_diff_cancel(id->rd, 1);
+        evas_textblock_cursor_char_delete(cur);
+     }
+   evas_textblock_cursor_pos_set(cur, evas_textblock_cursor_pos_get(cur_orig));
+
+   /* Spaces for indent are not required.
+      Insert spaces for tab. */
+   int space = indent_space_get(id);
+   if (space <= 0) goto end;
+
+   evas_textblock_cursor_paragraph_prev(cur);
+   evas_textblock_cursor_paragraph_next(cur);
+   utf8 = evas_textblock_cursor_range_text_get(cur, cur_orig,
+                                               EVAS_TEXTBLOCK_TEXT_PLAIN);
+   /* There is no paragraph.
+      Insert spaces for indent. */
+   if (!utf8)
+     {
+        insert_indent_space = EINA_TRUE;
+        goto end;
+     }
+
+   utf8_len = strlen(utf8);
+   /* Paragraph is shorter than spaces for indent.
+      Insert spaces for indent. */
+   if (utf8_len < space)
+     insert_indent_space = EINA_TRUE;
+
+end:
+   if (insert_indent_space)
+     {
+        //Allocate spaces for indent.
+        p = alloca(space - utf8_len + 1);
+        memset(p, ' ', space - utf8_len);
+        p[space - utf8_len] = '\0';
+     }
+   else
+     {
+        //Allocate spaces for tab.
+        p = alloca(TAB_SPACE + 1);
+        memset(p, ' ', TAB_SPACE);
+        p[TAB_SPACE] = '\0';
+     }
+
+   redoundo_text_push(id->rd, p, elm_entry_cursor_pos_get(entry), 0, EINA_TRUE);
+   elm_entry_entry_insert(entry, p);
+
+   if (utf8) free(utf8);
+   evas_textblock_cursor_free(cur);
+}
+
 static void
 indent_insert_bracket_case(indent_data *id, int cur_line)
 {
@@ -941,6 +1010,11 @@ indent_insert_apply(indent_data *id, const char *insert, int cur_line)
              indent_insert_br_case(id);
              return 1;
           }
+        else if (!strcmp(insert, TAB))
+          {
+             indent_insert_tab_case(id);
+             return 0;
+          }
         else if (!strcmp(insert, QUOT))
           return 0;
         else if (!strcmp(insert, LESS))