From 74b30216910076243828e56b8583f66c45246030 Mon Sep 17 00:00:00 2001
From: Mateo Kuruk Miccino <mateomiccino@gmail.com>
Date: Sun, 28 Feb 2021 17:41:11 -0300
Subject: [PATCH] LineEdit: Now double click to select a word, and triple click
 to select all the content

---
 scene/gui/line_edit.cpp | 34 ++++++++++++++++++++++++++++------
 scene/gui/line_edit.h   |  1 +
 2 files changed, 29 insertions(+), 6 deletions(-)

diff --git a/scene/gui/line_edit.cpp b/scene/gui/line_edit.cpp
index 45c9b81737ff..5f72fe391e51 100644
--- a/scene/gui/line_edit.cpp
+++ b/scene/gui/line_edit.cpp
@@ -88,12 +88,34 @@ void LineEdit::_gui_input(Ref<InputEvent> p_event) {
 
 			} else {
 
-				if (b->is_doubleclick() && selecting_enabled) {
-
-					selection.enabled = true;
-					selection.begin = 0;
-					selection.end = text.length();
-					selection.doubleclick = true;
+				if (selecting_enabled) {
+					if (!b->is_doubleclick() && (OS::get_singleton()->get_ticks_msec() - selection.last_dblclk) < 600) {
+						// Triple-click select all.
+						selection.enabled = true;
+						selection.begin = 0;
+						selection.end = text.length();
+						selection.doubleclick = true;
+						selection.last_dblclk = 0;
+					} else if (b->is_doubleclick()) {
+						// Double-click select word.
+						selection.enabled = true;
+						int beg = cursor_pos;
+						int end = beg;
+						bool symbol = beg < text.length() && is_symbol(text[beg]);
+						while (beg > 0 && text[beg - 1] > 32 && (symbol == is_symbol(text[beg - 1]))) {
+							beg--;
+						}
+						while (end < text.length() && text[end + 1] > 32 && (symbol == is_symbol(text[end + 1]))) {
+							end++;
+						}
+						if (end < text.length()) {
+							end += 1;
+						}
+						selection.begin = beg;
+						selection.end = end;
+						selection.doubleclick = true;
+						selection.last_dblclk = OS::get_singleton()->get_ticks_msec();
+					}
 				}
 
 				selection.drag_attempt = false;
diff --git a/scene/gui/line_edit.h b/scene/gui/line_edit.h
index d1ebda9bf605..85df7cbb0359 100644
--- a/scene/gui/line_edit.h
+++ b/scene/gui/line_edit.h
@@ -104,6 +104,7 @@ class LineEdit : public Control {
 		bool creating;
 		bool doubleclick;
 		bool drag_attempt;
+		uint64_t last_dblclk = 0;
 	} selection;
 
 	struct TextOperation {