Allow dehardcoding documentation branch and URL in docs links

This makes it possible to change the branch of the documentation that
URLs are pointing to without having to modify all class reference
files.

In the XML class reference, the `$DOCS_URL` placeholder should be used,
and will be replaced automatically in the editor and when generating
the RST class reference.

The documentation branch string is set in `version.py`.

Co-authored-by: Hugo Locurcio <hugo.locurcio@hugo.pro>

1 files changed, 11 insertions, 5 deletions

diff --git a/core/string/ustring.cpp b/core/string/ustring.cpp
index 4798cab641..70236231a2 100644
--- a/core/string/ustring.cpp
+++ b/core/string/ustring.cpp
@@ -38,6 +38,7 @@
 #include "core/string/translation.h"
 #include "core/string/ucaps.h"
 #include "core/variant/variant.h"
+#include "core/version_generated.gen.h"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -4868,15 +4869,20 @@ String TTRN(const String &p_text, const String &p_text_plural, int p_n, const St
 	return p_text_plural;
 }
 
+/* DTR and DTRN are used for the documentation, handling descriptions extracted
+ * from the XML.
+ * They also replace `$DOCS_URL` with the actual URL to the documentation's branch,
+ * to allow dehardcoding it in the XML and doing proper substitutions everywhere.
+ */
 String DTR(const String &p_text, const String &p_context) {
 	// Comes straight from the XML, so remove indentation and any trailing whitespace.
 	const String text = p_text.dedent().strip_edges();
 
 	if (TranslationServer::get_singleton()) {
-		return TranslationServer::get_singleton()->doc_translate(text, p_context);
+		return String(TranslationServer::get_singleton()->doc_translate(text, p_context)).replace("$DOCS_URL", VERSION_DOCS_URL);
 	}
 
-	return text;
+	return text.replace("$DOCS_URL", VERSION_DOCS_URL);
 }
 
 String DTRN(const String &p_text, const String &p_text_plural, int p_n, const String &p_context) {
@@ -4884,14 +4890,14 @@ String DTRN(const String &p_text, const String &p_text_plural, int p_n, const St
 	const String text_plural = p_text_plural.dedent().strip_edges();
 
 	if (TranslationServer::get_singleton()) {
-		return TranslationServer::get_singleton()->doc_translate_plural(text, text_plural, p_n, p_context);
+		return String(TranslationServer::get_singleton()->doc_translate_plural(text, text_plural, p_n, p_context)).replace("$DOCS_URL", VERSION_DOCS_URL);
 	}
 
 	// Return message based on English plural rule if translation is not possible.
 	if (p_n == 1) {
-		return text;
+		return text.replace("$DOCS_URL", VERSION_DOCS_URL);
 	}
-	return text_plural;
+	return text_plural.replace("$DOCS_URL", VERSION_DOCS_URL);
 }
 #endif