/*************************************************************************/
/*  style_box.cpp                                                        */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 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 "style_box.h"

bool StyleBox::test_mask(const Point2 &p_point, const Rect2 &p_rect) const {

	return true;
}

void StyleBox::set_default_margin(Margin p_margin, float p_value) {

	margin[p_margin] = p_value;
	emit_changed();
}
float StyleBox::get_default_margin(Margin p_margin) const {

	return margin[p_margin];
}

float StyleBox::get_margin(Margin p_margin) const {

	if (margin[p_margin] < 0)
		return get_style_margin(p_margin);
	else
		return margin[p_margin];
}

Size2 StyleBox::get_minimum_size() const {

	return Size2(get_margin(MARGIN_LEFT) + get_margin(MARGIN_RIGHT), get_margin(MARGIN_TOP) + get_margin(MARGIN_BOTTOM));
}

Point2 StyleBox::get_offset() const {

	return Point2(get_margin(MARGIN_LEFT), get_margin(MARGIN_TOP));
}

Size2 StyleBox::get_center_size() const {

	return Size2();
}

void StyleBox::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("test_mask", "point", "rect"), &StyleBox::test_mask);

	ObjectTypeDB::bind_method(_MD("set_default_margin", "margin", "offset"), &StyleBox::set_default_margin);
	ObjectTypeDB::bind_method(_MD("get_default_margin", "margin"), &StyleBox::get_default_margin);

	//	ObjectTypeDB::bind_method(_MD("set_default_margin"),&StyleBox::set_default_margin);
	//	ObjectTypeDB::bind_method(_MD("get_default_margin"),&StyleBox::get_default_margin);

	ObjectTypeDB::bind_method(_MD("get_margin", "margin"), &StyleBox::get_margin);
	ObjectTypeDB::bind_method(_MD("get_minimum_size"), &StyleBox::get_minimum_size);
	ObjectTypeDB::bind_method(_MD("get_center_size"), &StyleBox::get_center_size);
	ObjectTypeDB::bind_method(_MD("get_offset"), &StyleBox::get_offset);

	ObjectTypeDB::bind_method(_MD("draw", "canvas_item", "rect"), &StyleBox::draw);

	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "content_margin/left", PROPERTY_HINT_RANGE, "-1,2048,1"), _SCS("set_default_margin"), _SCS("get_default_margin"), MARGIN_LEFT);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "content_margin/right", PROPERTY_HINT_RANGE, "-1,2048,1"), _SCS("set_default_margin"), _SCS("get_default_margin"), MARGIN_RIGHT);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "content_margin/top", PROPERTY_HINT_RANGE, "-1,2048,1"), _SCS("set_default_margin"), _SCS("get_default_margin"), MARGIN_TOP);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "content_margin/bottom", PROPERTY_HINT_RANGE, "-1,2048,1"), _SCS("set_default_margin"), _SCS("get_default_margin"), MARGIN_BOTTOM);
}

StyleBox::StyleBox() {

	for (int i = 0; i < 4; i++) {

		margin[i] = -1;
	}
}

void StyleBoxTexture::set_texture(RES p_texture) {

	if (texture == p_texture)
		return;
	texture = p_texture;
	emit_signal("texture_changed");
	emit_changed();
}
RES StyleBoxTexture::get_texture() const {

	return texture;
}

void StyleBoxTexture::set_margin_size(Margin p_margin, float p_size) {

	margin[p_margin] = p_size;
	emit_changed();
}
float StyleBoxTexture::get_margin_size(Margin p_margin) const {

	return margin[p_margin];
}

float StyleBoxTexture::get_style_margin(Margin p_margin) const {

	return margin[p_margin];
}

void StyleBoxTexture::draw(RID p_canvas_item, const Rect2 &p_rect) const {
	if (texture.is_null())
		return;

	Rect2 r = p_rect;
	r.pos.x -= expand_margin[MARGIN_LEFT];
	r.pos.y -= expand_margin[MARGIN_TOP];
	r.size.x += expand_margin[MARGIN_LEFT] + expand_margin[MARGIN_RIGHT];
	r.size.y += expand_margin[MARGIN_TOP] + expand_margin[MARGIN_BOTTOM];
	VisualServer::get_singleton()->canvas_item_add_style_box(p_canvas_item, r, region_rect, texture->get_rid(), Vector2(margin[MARGIN_LEFT], margin[MARGIN_TOP]), Vector2(margin[MARGIN_RIGHT], margin[MARGIN_BOTTOM]), draw_center);
}

void StyleBoxTexture::set_draw_center(bool p_draw) {

	draw_center = p_draw;
	emit_changed();
}

bool StyleBoxTexture::get_draw_center() const {

	return draw_center;
}

Size2 StyleBoxTexture::get_center_size() const {

	if (texture.is_null())
		return Size2();

	return texture->get_size() - get_minimum_size();
}

void StyleBoxTexture::set_expand_margin_size(Margin p_expand_margin, float p_size) {

	ERR_FAIL_INDEX(p_expand_margin, 4);
	expand_margin[p_expand_margin] = p_size;
	emit_changed();
}

float StyleBoxTexture::get_expand_margin_size(Margin p_expand_margin) const {

	ERR_FAIL_INDEX_V(p_expand_margin, 4, 0);
	return expand_margin[p_expand_margin];
}

void StyleBoxTexture::set_region_rect(const Rect2 &p_region_rect) {

	if (region_rect == p_region_rect)
		return;

	region_rect = p_region_rect;
	emit_changed();
}

Rect2 StyleBoxTexture::get_region_rect() const {

	return region_rect;
}

void StyleBoxTexture::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("set_texture", "texture:Texture"), &StyleBoxTexture::set_texture);
	ObjectTypeDB::bind_method(_MD("get_texture:Texture"), &StyleBoxTexture::get_texture);

	ObjectTypeDB::bind_method(_MD("set_margin_size", "margin", "size"), &StyleBoxTexture::set_margin_size);
	ObjectTypeDB::bind_method(_MD("get_margin_size", "margin"), &StyleBoxTexture::get_margin_size);

	ObjectTypeDB::bind_method(_MD("set_expand_margin_size", "margin", "size"), &StyleBoxTexture::set_expand_margin_size);
	ObjectTypeDB::bind_method(_MD("get_expand_margin_size", "margin"), &StyleBoxTexture::get_expand_margin_size);

	ObjectTypeDB::bind_method(_MD("set_region_rect", "region"), &StyleBoxTexture::set_region_rect);
	ObjectTypeDB::bind_method(_MD("get_region_rect"), &StyleBoxTexture::get_region_rect);

	ObjectTypeDB::bind_method(_MD("set_draw_center", "enable"), &StyleBoxTexture::set_draw_center);
	ObjectTypeDB::bind_method(_MD("get_draw_center"), &StyleBoxTexture::get_draw_center);

	ADD_SIGNAL(MethodInfo("texture_changed"));

	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "texture", PROPERTY_HINT_RESOURCE_TYPE, "Texture"), _SCS("set_texture"), _SCS("get_texture"));
	ADD_PROPERTYNZ(PropertyInfo(Variant::RECT2, "region_rect"), _SCS("set_region_rect"), _SCS("get_region_rect"));
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "margin/left", PROPERTY_HINT_RANGE, "0,2048,1"), _SCS("set_margin_size"), _SCS("get_margin_size"), MARGIN_LEFT);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "margin/right", PROPERTY_HINT_RANGE, "0,2048,1"), _SCS("set_margin_size"), _SCS("get_margin_size"), MARGIN_RIGHT);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "margin/top", PROPERTY_HINT_RANGE, "0,2048,1"), _SCS("set_margin_size"), _SCS("get_margin_size"), MARGIN_TOP);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "margin/bottom", PROPERTY_HINT_RANGE, "0,2048,1"), _SCS("set_margin_size"), _SCS("get_margin_size"), MARGIN_BOTTOM);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "expand_margin/left", PROPERTY_HINT_RANGE, "0,2048,1"), _SCS("set_expand_margin_size"), _SCS("get_expand_margin_size"), MARGIN_LEFT);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "expand_margin/right", PROPERTY_HINT_RANGE, "0,2048,1"), _SCS("set_expand_margin_size"), _SCS("get_expand_margin_size"), MARGIN_RIGHT);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "expand_margin/top", PROPERTY_HINT_RANGE, "0,2048,1"), _SCS("set_expand_margin_size"), _SCS("get_expand_margin_size"), MARGIN_TOP);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "expand_margin/bottom", PROPERTY_HINT_RANGE, "0,2048,1"), _SCS("set_expand_margin_size"), _SCS("get_expand_margin_size"), MARGIN_BOTTOM);
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "draw_center"), _SCS("set_draw_center"), _SCS("get_draw_center"));
}

StyleBoxTexture::StyleBoxTexture() {

	for (int i = 0; i < 4; i++) {
		margin[i] = 0;
		expand_margin[i] = 0;
	}
	draw_center = true;
}
StyleBoxTexture::~StyleBoxTexture() {
}

////////////////

void StyleBoxFlat::set_bg_color(const Color &p_color) {

	bg_color = p_color;
	emit_changed();
}

void StyleBoxFlat::set_light_color(const Color &p_color) {

	light_color = p_color;
	emit_changed();
}
void StyleBoxFlat::set_dark_color(const Color &p_color) {

	dark_color = p_color;
	emit_changed();
}

Color StyleBoxFlat::get_bg_color() const {

	return bg_color;
}
Color StyleBoxFlat::get_light_color() const {

	return light_color;
}
Color StyleBoxFlat::get_dark_color() const {

	return dark_color;
}

void StyleBoxFlat::set_border_size(int p_size) {

	border_size = p_size;
	emit_changed();
}
int StyleBoxFlat::get_border_size() const {

	return border_size;
}

void StyleBoxFlat::set_border_blend(bool p_blend) {

	blend = p_blend;
	emit_changed();
}

bool StyleBoxFlat::get_border_blend() const {

	return blend;
}

void StyleBoxFlat::set_draw_center(bool p_draw) {

	draw_center = p_draw;
	emit_changed();
}
bool StyleBoxFlat::get_draw_center() const {

	return draw_center;
}
Size2 StyleBoxFlat::get_center_size() const {

	return Size2();
}

void StyleBoxFlat::draw(RID p_canvas_item, const Rect2 &p_rect) const {

	VisualServer *vs = VisualServer::get_singleton();
	Rect2i r = p_rect;

	for (int i = 0; i < border_size; i++) {

		Color color_upleft = light_color;
		Color color_downright = dark_color;

		if (blend) {

			color_upleft.r = (border_size - i) * color_upleft.r / border_size + i * bg_color.r / border_size;
			color_upleft.g = (border_size - i) * color_upleft.g / border_size + i * bg_color.g / border_size;
			color_upleft.b = (border_size - i) * color_upleft.b / border_size + i * bg_color.b / border_size;

			color_downright.r = (border_size - i) * color_downright.r / border_size + i * bg_color.r / border_size;
			color_downright.g = (border_size - i) * color_downright.g / border_size + i * bg_color.g / border_size;
			color_downright.b = (border_size - i) * color_downright.b / border_size + i * bg_color.b / border_size;
		}

		vs->canvas_item_add_rect(p_canvas_item, Rect2(Point2i(r.pos.x, r.pos.y + r.size.y - 1), Size2(r.size.x, 1)), color_downright);
		vs->canvas_item_add_rect(p_canvas_item, Rect2(Point2i(r.pos.x + r.size.x - 1, r.pos.y), Size2(1, r.size.y)), color_downright);

		vs->canvas_item_add_rect(p_canvas_item, Rect2(r.pos, Size2(r.size.x, 1)), color_upleft);
		vs->canvas_item_add_rect(p_canvas_item, Rect2(r.pos, Size2(1, r.size.y)), color_upleft);

		r.pos.x++;
		r.pos.y++;
		r.size.x -= 2;
		r.size.y -= 2;
	}

	if (draw_center)
		vs->canvas_item_add_rect(p_canvas_item, Rect2(r.pos, r.size), bg_color);
}

float StyleBoxFlat::get_style_margin(Margin p_margin) const {

	return border_size;
}
void StyleBoxFlat::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("set_bg_color", "color"), &StyleBoxFlat::set_bg_color);
	ObjectTypeDB::bind_method(_MD("get_bg_color"), &StyleBoxFlat::get_bg_color);
	ObjectTypeDB::bind_method(_MD("set_light_color", "color"), &StyleBoxFlat::set_light_color);
	ObjectTypeDB::bind_method(_MD("get_light_color"), &StyleBoxFlat::get_light_color);
	ObjectTypeDB::bind_method(_MD("set_dark_color", "color"), &StyleBoxFlat::set_dark_color);
	ObjectTypeDB::bind_method(_MD("get_dark_color"), &StyleBoxFlat::get_dark_color);
	ObjectTypeDB::bind_method(_MD("set_border_size", "size"), &StyleBoxFlat::set_border_size);
	ObjectTypeDB::bind_method(_MD("get_border_size"), &StyleBoxFlat::get_border_size);
	ObjectTypeDB::bind_method(_MD("set_border_blend", "blend"), &StyleBoxFlat::set_border_blend);
	ObjectTypeDB::bind_method(_MD("get_border_blend"), &StyleBoxFlat::get_border_blend);
	ObjectTypeDB::bind_method(_MD("set_draw_center", "size"), &StyleBoxFlat::set_draw_center);
	ObjectTypeDB::bind_method(_MD("get_draw_center"), &StyleBoxFlat::get_draw_center);

	ADD_PROPERTY(PropertyInfo(Variant::COLOR, "bg_color"), _SCS("set_bg_color"), _SCS("get_bg_color"));
	ADD_PROPERTY(PropertyInfo(Variant::COLOR, "light_color"), _SCS("set_light_color"), _SCS("get_light_color"));
	ADD_PROPERTY(PropertyInfo(Variant::COLOR, "dark_color"), _SCS("set_dark_color"), _SCS("get_dark_color"));
	ADD_PROPERTY(PropertyInfo(Variant::INT, "border_size", PROPERTY_HINT_RANGE, "0,4096"), _SCS("set_border_size"), _SCS("get_border_size"));
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "border_blend"), _SCS("set_border_blend"), _SCS("get_border_blend"));
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "draw_bg"), _SCS("set_draw_center"), _SCS("get_draw_center"));
}

StyleBoxFlat::StyleBoxFlat() {

	bg_color = Color(0.6, 0.6, 0.6);
	light_color = Color(0.8, 0.8, 0.8);
	dark_color = Color(0.8, 0.8, 0.8);
	draw_center = true;
	blend = true;
	border_size = 0;
}
StyleBoxFlat::~StyleBoxFlat() {
}

////////////////

void StyleBoxImageMask::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("set_image", "image"), &StyleBoxImageMask::set_image);
	ObjectTypeDB::bind_method(_MD("get_image"), &StyleBoxImageMask::get_image);
	ObjectTypeDB::bind_method(_MD("set_expand", "expand"), &StyleBoxImageMask::set_expand);
	ObjectTypeDB::bind_method(_MD("get_expand"), &StyleBoxImageMask::get_expand);
	ObjectTypeDB::bind_method(_MD("set_expand_margin_size", "margin", "size"), &StyleBoxImageMask::set_expand_margin_size);
	ObjectTypeDB::bind_method(_MD("get_expand_margin_size", "margin"), &StyleBoxImageMask::get_expand_margin_size);

	ADD_PROPERTY(PropertyInfo(Variant::IMAGE, "image"), _SCS("set_image"), _SCS("get_image"));
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "expand"), _SCS("set_expand"), _SCS("get_expand"));
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "expand_margin/left", PROPERTY_HINT_RANGE, "0,2048,1"), _SCS("set_expand_margin_size"), _SCS("get_expand_margin_size"), MARGIN_LEFT);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "expand_margin/right", PROPERTY_HINT_RANGE, "0,2048,1"), _SCS("set_expand_margin_size"), _SCS("get_expand_margin_size"), MARGIN_RIGHT);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "expand_margin/top", PROPERTY_HINT_RANGE, "0,2048,1"), _SCS("set_expand_margin_size"), _SCS("get_expand_margin_size"), MARGIN_TOP);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "expand_margin/bottom", PROPERTY_HINT_RANGE, "0,2048,1"), _SCS("set_expand_margin_size"), _SCS("get_expand_margin_size"), MARGIN_BOTTOM);
}

bool StyleBoxImageMask::test_mask(const Point2 &p_point, const Rect2 &p_rect) const {

	if (image.empty())
		return false;
	if (p_rect.size.x < 1)
		return false;
	if (p_rect.size.y < 1)
		return false;

	Size2i imgsize(image.get_width(), image.get_height());
	if (imgsize.x <= 0 || imgsize.y <= 0)
		return false;

	Point2i img_expand_size(imgsize.x - expand_margin[MARGIN_LEFT] - expand_margin[MARGIN_RIGHT], imgsize.y - expand_margin[MARGIN_TOP] - expand_margin[MARGIN_BOTTOM]);
	Point2i rect_expand_size(p_rect.size.x - expand_margin[MARGIN_LEFT] - expand_margin[MARGIN_RIGHT], p_rect.size.y - expand_margin[MARGIN_TOP] - expand_margin[MARGIN_BOTTOM]);
	if (rect_expand_size.x < 1)
		rect_expand_size.x = 1;
	if (rect_expand_size.y < 1)
		rect_expand_size.y = 1;

	Point2i click_pos;

	//treat x

	if (p_point.x < p_rect.pos.x)
		click_pos.x = 0;
	else if (expand) {

		if (p_point.x >= p_rect.pos.x + p_rect.size.x)
			click_pos.x = imgsize.x - 1;
		else if ((p_point.x - p_rect.pos.x) < expand_margin[MARGIN_LEFT])
			click_pos.x = p_point.x;
		else if ((p_point.x - (p_rect.pos.x + p_rect.size.x)) < expand_margin[MARGIN_RIGHT])
			click_pos.x = imgsize.x - (p_point.x - (p_rect.pos.x + p_rect.size.x));
		else //expand
			click_pos.x = (p_point.x - p_rect.pos.x - expand_margin[MARGIN_LEFT]) * img_expand_size.x / rect_expand_size.x;
	} else if ((p_point.x - p_rect.pos.x) > imgsize.x)
		click_pos.x = imgsize.x;

	//treat y

	if (p_point.y < p_rect.pos.y)
		click_pos.y = 0;
	else if (expand) {

		if (p_point.y >= p_rect.pos.y + p_rect.size.y)
			click_pos.y = imgsize.y - 1;
		else if ((p_point.y - p_rect.pos.y) < expand_margin[MARGIN_TOP])
			click_pos.y = p_point.y;
		else if ((p_point.y - (p_rect.pos.y + p_rect.size.y)) < expand_margin[MARGIN_BOTTOM])
			click_pos.y = imgsize.y - (p_point.y - (p_rect.pos.y + p_rect.size.y));
		else //expand
			click_pos.y = (p_point.y - p_rect.pos.y - expand_margin[MARGIN_TOP]) * img_expand_size.y / rect_expand_size.y;
	} else if ((p_point.y - p_rect.pos.y) > imgsize.y)
		click_pos.y = imgsize.y;

	return image.get_pixel(click_pos.x, click_pos.y).gray() > 0.5;
}

void StyleBoxImageMask::set_image(const Image &p_image) {

	image = p_image;
}
Image StyleBoxImageMask::get_image() const {

	return image;
}

void StyleBoxImageMask::set_expand(bool p_expand) {

	expand = p_expand;
}
bool StyleBoxImageMask::get_expand() const {

	return expand;
}
void StyleBoxImageMask::set_expand_margin_size(Margin p_expand_margin, float p_size) {

	ERR_FAIL_INDEX(p_expand_margin, 4);
	expand_margin[p_expand_margin] = p_size;
}

float StyleBoxImageMask::get_expand_margin_size(Margin p_expand_margin) const {

	ERR_FAIL_INDEX_V(p_expand_margin, 4, 0);
	return expand_margin[p_expand_margin];
}

StyleBoxImageMask::StyleBoxImageMask() {

	for (int i = 0; i < 4; i++) {
		expand_margin[i] = 0;
	}
	expand = true;
}