From 22ef9673dd78caba3f0eebb2c1e0ddb4d7dfca41 Mon Sep 17 00:00:00 2001
From: Paulb23 <p_batty@hotmail.co.uk>
Date: Thu, 31 Mar 2016 20:49:30 +0100
Subject: [PATCH] Added insert mode to text editor

(cherry picked from commit 2b57cb94da8bfad1f32a89437f4978301da92e10)
---
 scene/gui/text_edit.cpp | 45 ++++++++++++++++++++++++++++++++++++++---
 scene/gui/text_edit.h   |  4 ++++
 2 files changed, 46 insertions(+), 3 deletions(-)

diff --git a/scene/gui/text_edit.cpp b/scene/gui/text_edit.cpp
index 99efce42c85..f7dbae9dec6 100644
--- a/scene/gui/text_edit.cpp
+++ b/scene/gui/text_edit.cpp
@@ -908,7 +908,12 @@ void TextEdit::_notification(int p_what) {
 					if (cursor.column==j && cursor.line==line) {
 
 						cursor_pos = Point2i( char_ofs+char_margin, ofs_y );
-						VisualServer::get_singleton()->canvas_item_add_rect(ci,Rect2(cursor_pos, Size2i(1,get_row_height())),cache.font_color);
+						if (insert_mode) {
+							cursor_pos.y += get_row_height();
+							VisualServer::get_singleton()->canvas_item_add_rect(ci,Rect2(cursor_pos, Size2i(char_w,1)),cache.font_color);
+						} else {
+							VisualServer::get_singleton()->canvas_item_add_rect(ci,Rect2(cursor_pos, Size2i(1,get_row_height())),cache.font_color);
+						}
 
 
 					}
@@ -919,8 +924,13 @@ void TextEdit::_notification(int p_what) {
 				if (cursor.column==str.length() && cursor.line==line && (char_ofs+char_margin)>=xmargin_beg) {
 
 					cursor_pos=Point2i( char_ofs+char_margin, ofs_y );
-					VisualServer::get_singleton()->canvas_item_add_rect(ci,Rect2(cursor_pos, Size2i(1,get_row_height())),cache.font_color);
-
+					if (insert_mode) {
+						cursor_pos.y += get_row_height();
+						int char_w = cache.font->get_char_size(' ').width;
+						VisualServer::get_singleton()->canvas_item_add_rect(ci,Rect2(cursor_pos, Size2i(char_w,1)),cache.font_color);
+					} else {
+						VisualServer::get_singleton()->canvas_item_add_rect(ci,Rect2(cursor_pos, Size2i(1,get_row_height())),cache.font_color);
+					}
 				}
 			}
 
@@ -2332,6 +2342,12 @@ void TextEdit::_input_event(const InputEvent& p_input_event) {
 		}
 	    }
 */
+			if (k.scancode==KEY_INSERT) {
+				set_insert_mode(!insert_mode);
+				accept_event();
+				return;
+			}
+
 			if (!scancode_handled && !k.mod.command) { //for german kbds
 
 				if (k.unicode>=32) {
@@ -2339,6 +2355,16 @@ void TextEdit::_input_event(const InputEvent& p_input_event) {
 					if (readonly)
 						break;
 
+					// remove the old character if in insert mode
+					if (insert_mode) {
+						_begin_compex_operation();
+
+						// make sure we don't try and remove empty space
+						if (cursor.column < get_line(cursor.line).length()) {
+							_remove_text(cursor.line, cursor.column, cursor.line, cursor.column + 1);
+						}
+					}
+
 					const CharType chr[2] = {(CharType)k.unicode, 0};
 
 					if (completion_hint!="" && k.unicode==')') {
@@ -2350,6 +2376,9 @@ void TextEdit::_input_event(const InputEvent& p_input_event) {
 						_insert_text_at_cursor(chr);
 					}
 
+					if (insert_mode) {
+						_end_compex_operation();
+					}
 					accept_event();
 				} else {
 
@@ -3593,6 +3622,15 @@ bool TextEdit::is_drawing_tabs() const{
 	return draw_tabs;
 }
 
+void TextEdit::set_insert_mode(bool p_enabled) {
+	insert_mode = p_enabled;
+	update();
+}
+
+bool TextEdit::is_insert_mode() const {
+	return insert_mode;
+}
+
 uint32_t TextEdit::get_version() const {
 	return current_op.version;
 }
@@ -4085,6 +4123,7 @@ TextEdit::TextEdit()  {
 	auto_brace_completion_enabled=false;
 	brace_matching_enabled=false;
 	auto_indent=false;
+	insert_mode = false;
 }
 
 TextEdit::~TextEdit()
diff --git a/scene/gui/text_edit.h b/scene/gui/text_edit.h
index 39ed367a1cc..22071640a24 100644
--- a/scene/gui/text_edit.h
+++ b/scene/gui/text_edit.h
@@ -221,6 +221,7 @@ class TextEdit : public Control  {
 	bool brace_matching_enabled;
 	bool auto_indent;
 	bool cut_copy_line;
+	bool insert_mode;
 
 	uint64_t last_dblclk;
 
@@ -390,6 +391,9 @@ public:
 	void set_draw_tabs(bool p_draw);
 	bool is_drawing_tabs() const;
 
+	void set_insert_mode(bool p_enabled);
+	bool is_insert_mode() const;
+
 	void add_keyword_color(const String& p_keyword,const Color& p_color);
 	void add_color_region(const String& p_begin_key=String(),const String& p_end_key=String(),const Color &p_color=Color(),bool p_line_only=false);
 	void set_symbol_color(const Color& p_color);