From c3a9fc5efb4a81f6efb28d0c787e17503deaee46 Mon Sep 17 00:00:00 2001
From: Campbell Barton <ideasman42@gmail.com>
Date: Sun, 11 Aug 2019 20:50:02 +1000
Subject: Text: support comment without selection

D5451 by @Poulpator with fixes.
---
 source/blender/blenkernel/intern/text.c      | 17 +++++++----
 source/blender/editors/space_text/text_ops.c | 42 +++++++++++++---------------
 2 files changed, 31 insertions(+), 28 deletions(-)

diff --git a/source/blender/blenkernel/intern/text.c b/source/blender/blenkernel/intern/text.c
index 1a3e42a7da2..83be64e84c9 100644
--- a/source/blender/blenkernel/intern/text.c
+++ b/source/blender/blenkernel/intern/text.c
@@ -1931,7 +1931,7 @@ bool txt_replace_char(Text *text, unsigned int add)
  *
  * \note caller must handle undo.
  */
-static void txt_select_prefix(Text *text, const char *add)
+static void txt_select_prefix(Text *text, const char *add, bool skip_blank_lines)
 {
   int len, num, curc_old, selc_old;
   char *tmp;
@@ -1947,7 +1947,7 @@ static void txt_select_prefix(Text *text, const char *add)
   while (true) {
 
     /* don't indent blank lines */
-    if (text->curl->len != 0) {
+    if ((text->curl->len != 0) || (skip_blank_lines == 0)) {
       tmp = MEM_mallocN(text->curl->len + indentlen + 1, "textline_string");
 
       text->curc = 0;
@@ -1971,7 +1971,9 @@ static void txt_select_prefix(Text *text, const char *add)
     }
 
     if (text->curl == text->sell) {
-      text->selc += indentlen;
+      if (text->curl->len != 0) {
+        text->selc += indentlen;
+      }
       break;
     }
     else {
@@ -1995,7 +1997,9 @@ static void txt_select_prefix(Text *text, const char *add)
     text->curc = 0;
   }
   else {
-    text->curc = curc_old + indentlen;
+    if (text->curl->len != 0) {
+      text->curc = curc_old + indentlen;
+    }
   }
 }
 
@@ -2089,7 +2093,8 @@ void txt_comment(Text *text)
     return;
   }
 
-  txt_select_prefix(text, prefix);
+  const bool skip_blank_lines = txt_has_sel(text);
+  txt_select_prefix(text, prefix, skip_blank_lines);
 }
 
 bool txt_uncomment(Text *text)
@@ -2111,7 +2116,7 @@ void txt_indent(Text *text)
     return;
   }
 
-  txt_select_prefix(text, prefix);
+  txt_select_prefix(text, prefix, true);
 }
 
 bool txt_unindent(Text *text)
diff --git a/source/blender/editors/space_text/text_ops.c b/source/blender/editors/space_text/text_ops.c
index a8af9c73bf2..e1550deb659 100644
--- a/source/blender/editors/space_text/text_ops.c
+++ b/source/blender/editors/space_text/text_ops.c
@@ -1217,36 +1217,34 @@ static int text_comment_exec(bContext *C, wmOperator *op)
   Text *text = CTX_data_edit_text(C);
   int type = RNA_enum_get(op->ptr, "type");
 
-  if (txt_has_sel(text)) {
-    text_drawcache_tag_update(CTX_wm_space_text(C), 0);
+  text_drawcache_tag_update(CTX_wm_space_text(C), 0);
 
-    ED_text_undo_push_init(C);
+  ED_text_undo_push_init(C);
 
+  if (txt_has_sel(text)) {
     txt_order_cursors(text, false);
+  }
 
-    switch (type) {
-      case 1:
+  switch (type) {
+    case 1:
+      txt_comment(text);
+      break;
+    case -1:
+      txt_uncomment(text);
+      break;
+    default:
+      if (txt_uncomment(text) == false) {
         txt_comment(text);
-        break;
-      case -1:
-        txt_uncomment(text);
-        break;
-      default:
-        if (txt_uncomment(text) == false) {
-          txt_comment(text);
-        }
-        break;
-    }
-
-    text_update_edited(text);
+      }
+      break;
+  }
 
-    text_update_cursor_moved(C);
-    WM_event_add_notifier(C, NC_TEXT | NA_EDITED, text);
+  text_update_edited(text);
 
-    return OPERATOR_FINISHED;
-  }
+  text_update_cursor_moved(C);
+  WM_event_add_notifier(C, NC_TEXT | NA_EDITED, text);
 
-  return OPERATOR_CANCELLED;
+  return OPERATOR_FINISHED;
 }
 
 void TEXT_OT_comment_toggle(wmOperatorType *ot)
-- 
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