Fix #27319: Text editor "Find" does not locate words.

Added new option to find panel of space text which toggles
case-esensitive search.

Additional changes:
- Send NC_TEXT|NA_EDITED when removing markers in find_and_replace modifier
  this prevents "sticked" markers which disappears on first redraw when
  search text wasn't found
- Do not show "Text wasn't found" error when text to be searched is contained
  in the end of buffer and it's selected. Replacing/marking used to happen, but
  this popup message was really annoying for this case.

TODO: It's incorrect to use UI_GetThemeColor4ubv from this operator

release/scripts/startup/bl_ui/space_text.py

@@ -129,6 +129,7 @@ class TEXT_PT_find(bpy.types.Panel):
         layout.operator("text.mark_all")
 
         # settings
+        layout.prop(st, "use_match_case")
         row = layout.row()
         row.prop(st, "use_find_wrap", text="Wrap")
         row.prop(st, "use_find_all", text="All")

source/blender/blenkernel/BKE_text.h

@@ -58,7 +58,7 @@ void			write_text(struct Text *text, const char *str);
 char*	txt_to_buf			(struct Text *text);
 void	txt_clean_text		(struct Text *text);
 void	txt_order_cursors	(struct Text *text);
-int		txt_find_string		(struct Text *text, char *findstr, int wrap);
+int		txt_find_string		(struct Text *text, char *findstr, int wrap, int match_case);
 int		txt_has_sel			(struct Text *text);
 int		txt_get_span		(struct TextLine *from, struct TextLine *to);
 void	txt_move_up			(struct Text *text, short sel);

source/blender/blenkernel/intern/text.c

@@ -1232,7 +1232,7 @@ char *txt_to_buf (Text *text)
 	return buf;
 }
 
-int txt_find_string(Text *text, char *findstr, int wrap)
+int txt_find_string(Text *text, char *findstr, int wrap, int match_case)
 {
 	TextLine *tl, *startl;
 	char *s= NULL;
@@ -1246,7 +1246,8 @@ int txt_find_string(Text *text, char *findstr, int wrap)
 	oldsl= txt_get_span(text->lines.first, text->sell);
 	tl= startl= text->sell;
 	
-	s= strstr(&tl->line[text->selc], findstr);
+	if(match_case) s= strstr(&tl->line[text->selc], findstr);
+	else s= BLI_strcasestr(&tl->line[text->selc], findstr);
 	while (!s) {
 		tl= tl->next;
 		if (!tl) {
@@ -1256,7 +1257,8 @@ int txt_find_string(Text *text, char *findstr, int wrap)
 				break;
 		}
 
-		s= strstr(tl->line, findstr);
+		if(match_case) s= strstr(tl->line, findstr);
+		else s= BLI_strcasestr(tl->line, findstr);
 		if (tl==startl)
 			break;
 	}

source/blender/editors/space_text/text_ops.c

@@ -2841,8 +2841,14 @@ static int find_and_replace(bContext *C, wmOperator *op, short mode)
 		flags ^= ST_FIND_WRAP;
 
 	do {
-		if(first)
+		int proceed= 0;
+
+		if(first) {
+			if(text->markers.first)
+				WM_event_add_notifier(C, NC_TEXT|NA_EDITED, text);
+
 			txt_clear_markers(text, TMARK_GRP_FINDALL, 0);
+		}
 
 		first= 0;
 		
@@ -2850,7 +2856,10 @@ static int find_and_replace(bContext *C, wmOperator *op, short mode)
 		if(mode!=TEXT_FIND && txt_has_sel(text)) {
 			tmp= txt_sel_to_buf(text);
 
-			if(strcmp(st->findstr, tmp)==0) {
+			if(flags & ST_MATCH_CASE) proceed= strcmp(st->findstr, tmp)==0;
+			else proceed= BLI_strcasecmp(st->findstr, tmp)==0;
+
+			if(proceed) {
 				if(mode==TEXT_REPLACE) {
 					txt_insert_buf(text, st->replacestr);
 					if(text->curl && text->curl->format) {
@@ -2880,7 +2889,7 @@ static int find_and_replace(bContext *C, wmOperator *op, short mode)
 		}
 
 		/* Find next */
-		if(txt_find_string(text, st->findstr, flags & ST_FIND_WRAP)) {
+		if(txt_find_string(text, st->findstr, flags & ST_FIND_WRAP, flags & ST_MATCH_CASE)) {
 			text_update_cursor_moved(C);
 			WM_event_add_notifier(C, NC_TEXT|ND_CURSOR, text);
 		}
@@ -2897,7 +2906,7 @@ static int find_and_replace(bContext *C, wmOperator *op, short mode)
 			first= 1;
 		}
 		else {
-			if(!found) BKE_reportf(op->reports, RPT_ERROR, "Text not found: %s", st->findstr);
+			if(!found && !proceed) BKE_reportf(op->reports, RPT_ERROR, "Text not found: %s", st->findstr);
 			break;
 		}
 		found = 1;

source/blender/makesdna/DNA_space_types.h

@@ -824,6 +824,7 @@ enum {
 #define	ST_FIND_WRAP			0x0020
 #define	ST_FIND_ALL				0x0040
 #define	ST_SHOW_MARGIN			0x0080
+#define	ST_MATCH_CASE			0x0100
 
 
 /* stext->findstr/replacestr */

source/blender/makesrna/intern/rna_space.c

@@ -1825,6 +1825,11 @@ static void rna_def_space_text(BlenderRNA *brna)
 	RNA_def_property_ui_text(prop, "Find Wrap", "Search again from the start of the file when reaching the end");
 	RNA_def_property_update(prop, NC_SPACE|ND_SPACE_TEXT, NULL);
 
+	prop= RNA_def_property(srna, "use_match_case", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "flags", ST_MATCH_CASE);
+	RNA_def_property_ui_text(prop, "Match case", "Search string is sensitive to uppercase and lowercase letters");
+	RNA_def_property_update(prop, NC_SPACE|ND_SPACE_TEXT, NULL);
+
 	prop= RNA_def_property(srna, "find_text", PROP_STRING, PROP_NONE);
 	RNA_def_property_string_sdna(prop, NULL, "findstr");
 	RNA_def_property_ui_text(prop, "Find Text", "Text to search for with the find tool");