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/*************************************************************************/
/*  marker_2d.cpp                                                        */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/

#include "marker_2d.h"

void Marker2D::_draw_cross() {
	const real_t extents = get_gizmo_extents();

	// Add more points to create a "hard stop" in the color gradient.
	PackedVector2Array points_x = {
		Point2(+extents, 0),
		Point2(),
		Point2(),
		Point2(-extents, 0)
	};

	PackedVector2Array points_y = {
		Point2(0, +extents),
		Point2(),
		Point2(),
		Point2(0, -extents)
	};

	// Use the axis color which is brighter for the positive axis.
	// Use a darkened axis color for the negative axis.
	// This makes it possible to see in which direction the Marker3D node is rotated
	// (which can be important depending on how it's used).
	// Axis colors are taken from `axis_x_color` and `axis_y_color` (defined in `editor/editor_themes.cpp`).
	const Color color_x = Color(0.96, 0.20, 0.32);
	PackedColorArray colors_x = {
		color_x,
		color_x,
		color_x.lerp(Color(0, 0, 0), 0.5),
		color_x.lerp(Color(0, 0, 0), 0.5)
	};
	draw_multiline_colors(points_x, colors_x);

	const Color color_y = Color(0.53, 0.84, 0.01);
	PackedColorArray colors_y = {
		color_y,
		color_y,
		color_y.lerp(Color(0, 0, 0), 0.5),
		color_y.lerp(Color(0, 0, 0), 0.5)
	};
	draw_multiline_colors(points_y, colors_y);
}

#ifdef TOOLS_ENABLED
Rect2 Marker2D::_edit_get_rect() const {
	real_t extents = get_gizmo_extents();
	return Rect2(Point2(-extents, -extents), Size2(extents * 2, extents * 2));
}

bool Marker2D::_edit_use_rect() const {
	return false;
}
#endif

void Marker2D::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_ENTER_TREE: {
			queue_redraw();
		} break;

		case NOTIFICATION_DRAW: {
			if (!is_inside_tree()) {
				break;
			}
			if (Engine::get_singleton()->is_editor_hint()) {
				_draw_cross();
			}
		} break;
	}
}

void Marker2D::set_gizmo_extents(real_t p_extents) {
	gizmo_extents = p_extents;
	queue_redraw();
}

real_t Marker2D::get_gizmo_extents() const {
	return gizmo_extents;
}

void Marker2D::_bind_methods() {
	ClassDB::bind_method(D_METHOD("set_gizmo_extents", "extents"), &Marker2D::set_gizmo_extents);
	ClassDB::bind_method(D_METHOD("get_gizmo_extents"), &Marker2D::get_gizmo_extents);

	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "gizmo_extents", PROPERTY_HINT_RANGE, "0,1000,0.1,or_greater,suffix:px"), "set_gizmo_extents", "get_gizmo_extents");
}

Marker2D::Marker2D() {
}