Add a keyboard shortcut to select the word under cursor in TextEdit

This also acts as a general-purpose "deselect" shortcut since pressing
it a second time will deselect text.

This is available both in the script editor and in TextEdit fields
in use, both in the editor and projects.

The Duplicate Line script editor shortcut was moved to Ctrl + Shift + D
since it conflicts with the new shortcut (Ctrl + D). The rationale for
doing so is that Duplicate Line is a less commonly used action, and
its behavior can be replicated by copying and pasting the current line
anyway. (With no selection active, the whole line will be copied.)

2 files changed, 40 insertions, 1 deletions

diff --git a/scene/gui/text_edit.cpp b/scene/gui/text_edit.cpp
index 053af39701..d19d95f6f4 100644
--- a/scene/gui/text_edit.cpp
+++ b/scene/gui/text_edit.cpp
@@ -3381,13 +3381,18 @@ void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
 			return;
 		}
 
-		// SELECT ALL, CUT, COPY, PASTE.
+		// SELECT ALL, SELECT WORD UNDER CARET, CUT, COPY, PASTE.
 
 		if (k->is_action("ui_text_select_all", true)) {
 			select_all();
 			accept_event();
 			return;
 		}
+		if (k->is_action("ui_text_select_word_under_caret", true)) {
+			select_word_under_caret();
+			accept_event();
+			return;
+		}
 		if (k->is_action("ui_cut", true)) {
 			cut();
 			accept_event();
@@ -5149,6 +5154,39 @@ void TextEdit::select_all() {
 	update();
 }
 
+void TextEdit::select_word_under_caret() {
+	if (!selecting_enabled) {
+		return;
+	}
+
+	if (text.size() == 1 && text[0].length() == 0) {
+		return;
+	}
+
+	if (selection.active) {
+		// Allow toggling selection by pressing the shortcut a second time.
+		// This is also usable as a general-purpose "deselect" shortcut after
+		// selecting anything.
+		deselect();
+		return;
+	}
+
+	int begin = 0;
+	int end = 0;
+	const Vector<Vector2i> words = TS->shaped_text_get_word_breaks(text.get_line_data(cursor.line)->get_rid());
+	for (int i = 0; i < words.size(); i++) {
+		if (words[i].x <= cursor.column && words[i].y >= cursor.column) {
+			begin = words[i].x;
+			end = words[i].y;
+			break;
+		}
+	}
+
+	select(cursor.line, begin, cursor.line, end);
+	// Move the cursor to the end of the word for easier editing.
+	cursor_set_column(end, false);
+}
+
 void TextEdit::deselect() {
 	selection.active = false;
 	update();
diff --git a/scene/gui/text_edit.h b/scene/gui/text_edit.h
index 93214a5197..6ca50f3e2d 100644
--- a/scene/gui/text_edit.h
+++ b/scene/gui/text_edit.h
@@ -731,6 +731,7 @@ public:
 	void copy();
 	void paste();
 	void select_all();
+	void select_word_under_caret();
 	void select(int p_from_line, int p_from_column, int p_to_line, int p_to_column);
 	void deselect();
 	void swap_lines(int line1, int line2);