Add line length guideline to code editors

5 files changed, 39 insertions, 0 deletions

diff --git a/scene/gui/text_edit.cpp b/scene/gui/text_edit.cpp
index cabd6520b4..eee3ab462a 100644
--- a/scene/gui/text_edit.cpp
+++ b/scene/gui/text_edit.cpp
@@ -482,6 +482,14 @@ void TextEdit::_notification(int p_what) {
 			Color color = cache.font_color;
 			int in_region=-1;
 
+			if (line_length_guideline) {
+				int x=xmargin_beg+cache.font->get_char_size('0').width*line_length_guideline_col-cursor.x_ofs;
+				if (x>xmargin_beg && x<xmargin_end) {
+					Color guideline_color(color.r,color.g,color.b,color.a*0.25f);
+					VisualServer::get_singleton()->canvas_item_add_line(ci,Point2(x,0),Point2(x,cache.size.height),guideline_color);
+				}
+			}
+
 			if (syntax_coloring) {
 
 				if (custom_bg_color.a>0.01) {
@@ -4508,6 +4516,16 @@ bool TextEdit::is_show_line_numbers_enabled() const {
 	return line_numbers;
 }
 
+void TextEdit::set_show_line_length_guideline(bool p_show) {
+	line_length_guideline=p_show;
+	update();
+}
+
+void TextEdit::set_line_length_guideline_column(int p_column) {
+	line_length_guideline_col=p_column;
+	update();
+}
+
 void TextEdit::set_draw_breakpoint_gutter(bool p_draw) {
 	draw_breakpoint_gutter = p_draw;
 	update();
@@ -4785,6 +4803,8 @@ TextEdit::TextEdit()  {
 	completion_line_ofs=0;
 	tooltip_obj=NULL;
 	line_numbers=false;
+	line_length_guideline=false;
+	line_length_guideline_col=80;
 	draw_breakpoint_gutter=false;
 	next_operation_is_complex=false;
 	scroll_past_end_of_file_enabled=false;
diff --git a/scene/gui/text_edit.h b/scene/gui/text_edit.h
index 37477e3b7e..2a451ff45f 100644
--- a/scene/gui/text_edit.h
+++ b/scene/gui/text_edit.h
@@ -232,6 +232,8 @@ class TextEdit : public Control  {
 	bool text_changed_dirty;
 	bool undo_enabled;
 	bool line_numbers;
+	bool line_length_guideline;
+	int line_length_guideline_col;
 	bool draw_breakpoint_gutter;
 	int breakpoint_gutter_width;
 
@@ -485,6 +487,9 @@ public:
 	void set_show_line_numbers(bool p_show);
 	bool is_show_line_numbers_enabled() const;
 
+	void set_show_line_length_guideline(bool p_show);
+	void set_line_length_guideline_column(int p_column);
+
 	void set_draw_breakpoint_gutter(bool p_draw);
 	bool is_drawing_breakpoint_gutter() const;
 
diff --git a/tools/editor/editor_settings.cpp b/tools/editor/editor_settings.cpp
index a5ba4847f5..0ab42c5adb 100644
--- a/tools/editor/editor_settings.cpp
+++ b/tools/editor/editor_settings.cpp
@@ -549,6 +549,10 @@ void EditorSettings::_load_defaults(Ref<ConfigFile> p_extra_config) {
 	set("text_editor/show_line_numbers", true);
 	set("text_editor/show_breakpoint_gutter", true);
 
+	set("text_editor/show_line_length_guideline", false);
+	set("text_editor/line_length_guideline_column", 80);
+	hints["text_editor/line_length_guideline_column"]=PropertyInfo(Variant::INT,"text_editor/line_length_guideline_column",PROPERTY_HINT_RANGE,"20, 160, 10");
+
 	set("text_editor/trim_trailing_whitespace_on_save", false);
 	set("text_editor/idle_parse_delay",2);
 	set("text_editor/create_signal_callbacks",true);
diff --git a/tools/editor/plugins/script_text_editor.cpp b/tools/editor/plugins/script_text_editor.cpp
index 2f807eaa19..214582f759 100644
--- a/tools/editor/plugins/script_text_editor.cpp
+++ b/tools/editor/plugins/script_text_editor.cpp
@@ -254,6 +254,8 @@ void ScriptTextEditor::update_settings() {
 	code_editor->get_text_edit()->set_tab_size(EditorSettings::get_singleton()->get("text_editor/tab_size"));
 	code_editor->get_text_edit()->set_draw_tabs(EditorSettings::get_singleton()->get("text_editor/draw_tabs"));
 	code_editor->get_text_edit()->set_show_line_numbers(EditorSettings::get_singleton()->get("text_editor/show_line_numbers"));
+	code_editor->get_text_edit()->set_show_line_length_guideline(EditorSettings::get_singleton()->get("text_editor/show_line_length_guideline"));
+	code_editor->get_text_edit()->set_line_length_guideline_column(EditorSettings::get_singleton()->get("text_editor/line_length_guideline_column"));
 	code_editor->get_text_edit()->set_syntax_coloring(EditorSettings::get_singleton()->get("text_editor/syntax_highlighting"));
 	code_editor->get_text_edit()->set_highlight_all_occurrences(EditorSettings::get_singleton()->get("text_editor/highlight_all_occurrences"));
 	code_editor->get_text_edit()->cursor_set_blink_enabled(EditorSettings::get_singleton()->get("text_editor/caret_blink"));
@@ -1281,6 +1283,8 @@ ScriptTextEditor::ScriptTextEditor() {
 	code_editor->get_text_edit()->set_tab_size(EditorSettings::get_singleton()->get("text_editor/tab_size"));
 	code_editor->get_text_edit()->set_draw_tabs(EditorSettings::get_singleton()->get("text_editor/draw_tabs"));
 	code_editor->get_text_edit()->set_show_line_numbers(EditorSettings::get_singleton()->get("text_editor/show_line_numbers"));
+	code_editor->get_text_edit()->set_show_line_length_guideline(EditorSettings::get_singleton()->get("text_editor/show_line_length_guideline"));
+	code_editor->get_text_edit()->set_line_length_guideline_column(EditorSettings::get_singleton()->get("text_editor/line_length_guideline_column"));
 	code_editor->get_text_edit()->set_syntax_coloring(EditorSettings::get_singleton()->get("text_editor/syntax_highlighting"));
 	code_editor->get_text_edit()->set_highlight_all_occurrences(EditorSettings::get_singleton()->get("text_editor/highlight_all_occurrences"));
 	code_editor->get_text_edit()->cursor_set_blink_enabled(EditorSettings::get_singleton()->get("text_editor/caret_blink"));
diff --git a/tools/editor/plugins/shader_editor_plugin.cpp b/tools/editor/plugins/shader_editor_plugin.cpp
index b3317e8313..f7964eef54 100644
--- a/tools/editor/plugins/shader_editor_plugin.cpp
+++ b/tools/editor/plugins/shader_editor_plugin.cpp
@@ -377,6 +377,8 @@ void ShaderEditor::_editor_settings_changed() {
 		vertex_editor->get_text_edit()->set_tab_size(EditorSettings::get_singleton()->get("text_editor/tab_size"));
 		vertex_editor->get_text_edit()->set_draw_tabs(EditorSettings::get_singleton()->get("text_editor/draw_tabs"));
 		vertex_editor->get_text_edit()->set_show_line_numbers(EditorSettings::get_singleton()->get("text_editor/show_line_numbers"));
+		vertex_editor->get_text_edit()->set_show_line_length_guideline(EditorSettings::get_singleton()->get("text_editor/show_line_length_guideline"));
+		vertex_editor->get_text_edit()->set_line_length_guideline_column(EditorSettings::get_singleton()->get("text_editor/line_length_guideline_column"));
 		vertex_editor->get_text_edit()->set_syntax_coloring(EditorSettings::get_singleton()->get("text_editor/syntax_highlighting"));
 		vertex_editor->get_text_edit()->set_highlight_all_occurrences(EditorSettings::get_singleton()->get("text_editor/highlight_all_occurrences"));
 		vertex_editor->get_text_edit()->cursor_set_blink_enabled(EditorSettings::get_singleton()->get("text_editor/caret_blink"));
@@ -389,6 +391,8 @@ void ShaderEditor::_editor_settings_changed() {
 		fragment_editor->get_text_edit()->set_tab_size(EditorSettings::get_singleton()->get("text_editor/tab_size"));
 		fragment_editor->get_text_edit()->set_draw_tabs(EditorSettings::get_singleton()->get("text_editor/draw_tabs"));
 		fragment_editor->get_text_edit()->set_show_line_numbers(EditorSettings::get_singleton()->get("text_editor/show_line_numbers"));
+		fragment_editor->get_text_edit()->set_show_line_length_guideline(EditorSettings::get_singleton()->get("text_editor/show_line_length_guideline"));
+		fragment_editor->get_text_edit()->set_line_length_guideline_column(EditorSettings::get_singleton()->get("text_editor/line_length_guideline_column"));
 		fragment_editor->get_text_edit()->set_syntax_coloring(EditorSettings::get_singleton()->get("text_editor/syntax_highlighting"));
 		fragment_editor->get_text_edit()->set_highlight_all_occurrences(EditorSettings::get_singleton()->get("text_editor/highlight_all_occurrences"));
 		fragment_editor->get_text_edit()->cursor_set_blink_enabled(EditorSettings::get_singleton()->get("text_editor/caret_blink"));
@@ -401,6 +405,8 @@ void ShaderEditor::_editor_settings_changed() {
 		light_editor->get_text_edit()->set_tab_size(EditorSettings::get_singleton()->get("text_editor/tab_size"));
 		light_editor->get_text_edit()->set_draw_tabs(EditorSettings::get_singleton()->get("text_editor/draw_tabs"));
 		light_editor->get_text_edit()->set_show_line_numbers(EditorSettings::get_singleton()->get("text_editor/show_line_numbers"));
+		light_editor->get_text_edit()->set_show_line_length_guideline(EditorSettings::get_singleton()->get("text_editor/show_line_length_guideline"));
+		light_editor->get_text_edit()->set_line_length_guideline_column(EditorSettings::get_singleton()->get("text_editor/line_length_guideline_column"));
 		light_editor->get_text_edit()->set_syntax_coloring(EditorSettings::get_singleton()->get("text_editor/syntax_highlighting"));
 		light_editor->get_text_edit()->set_highlight_all_occurrences(EditorSettings::get_singleton()->get("text_editor/highlight_all_occurrences"));
 		light_editor->get_text_edit()->cursor_set_blink_enabled(EditorSettings::get_singleton()->get("text_editor/caret_blink"));