/*  nine_patch_rect.cpp                                                  */


#include "nine_patch_rect.h"

#include "core/config/project_settings.h"
#include "servers/rendering_server.h"

void NinePatchRect::_notification(int p_what) {
	if (p_what == NOTIFICATION_DRAW) {
		if (texture.is_null()) {
			return;
		}

		Rect2 rect = Rect2(Point2(), get_size());
		Rect2 src_rect = region_rect;

		texture->get_rect_region(rect, src_rect, rect, src_rect);

		RID ci = get_canvas_item();
		RS::get_singleton()->canvas_item_add_nine_patch(ci, rect, src_rect, texture->get_rid(), Vector2(margin[MARGIN_LEFT], margin[MARGIN_TOP]), Vector2(margin[MARGIN_RIGHT], margin[MARGIN_BOTTOM]), RS::NinePatchAxisMode(axis_h), RS::NinePatchAxisMode(axis_v), draw_center);
	}
}

Size2 NinePatchRect::get_minimum_size() const {
	return Size2(margin[MARGIN_LEFT] + margin[MARGIN_RIGHT], margin[MARGIN_TOP] + margin[MARGIN_BOTTOM]);
}
void NinePatchRect::_bind_methods() {
	ClassDB::bind_method(D_METHOD("set_texture", "texture"), &NinePatchRect::set_texture);
	ClassDB::bind_method(D_METHOD("get_texture"), &NinePatchRect::get_texture);
	ClassDB::bind_method(D_METHOD("set_patch_margin", "margin", "value"), &NinePatchRect::set_patch_margin);
	ClassDB::bind_method(D_METHOD("get_patch_margin", "margin"), &NinePatchRect::get_patch_margin);
	ClassDB::bind_method(D_METHOD("set_region_rect", "rect"), &NinePatchRect::set_region_rect);
	ClassDB::bind_method(D_METHOD("get_region_rect"), &NinePatchRect::get_region_rect);
	ClassDB::bind_method(D_METHOD("set_draw_center", "draw_center"), &NinePatchRect::set_draw_center);
	ClassDB::bind_method(D_METHOD("is_draw_center_enabled"), &NinePatchRect::is_draw_center_enabled);
	ClassDB::bind_method(D_METHOD("set_h_axis_stretch_mode", "mode"), &NinePatchRect::set_h_axis_stretch_mode);
	ClassDB::bind_method(D_METHOD("get_h_axis_stretch_mode"), &NinePatchRect::get_h_axis_stretch_mode);
	ClassDB::bind_method(D_METHOD("set_v_axis_stretch_mode", "mode"), &NinePatchRect::set_v_axis_stretch_mode);
	ClassDB::bind_method(D_METHOD("get_v_axis_stretch_mode"), &NinePatchRect::get_v_axis_stretch_mode);

	ADD_SIGNAL(MethodInfo("texture_changed"));

	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "texture", PROPERTY_HINT_RESOURCE_TYPE, "Texture"), "set_texture", "get_texture");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "draw_center"), "set_draw_center", "is_draw_center_enabled");
	ADD_PROPERTY(PropertyInfo(Variant::RECT2, "region_rect"), "set_region_rect", "get_region_rect");

	ADD_GROUP("Patch Margin", "patch_margin_");
	ADD_PROPERTYI(PropertyInfo(Variant::INT, "patch_margin_left", PROPERTY_HINT_RANGE, "0,16384,1"), "set_patch_margin", "get_patch_margin", MARGIN_LEFT);
	ADD_PROPERTYI(PropertyInfo(Variant::INT, "patch_margin_top", PROPERTY_HINT_RANGE, "0,16384,1"), "set_patch_margin", "get_patch_margin", MARGIN_TOP);
	ADD_PROPERTYI(PropertyInfo(Variant::INT, "patch_margin_right", PROPERTY_HINT_RANGE, "0,16384,1"), "set_patch_margin", "get_patch_margin", MARGIN_RIGHT);
	ADD_PROPERTYI(PropertyInfo(Variant::INT, "patch_margin_bottom", PROPERTY_HINT_RANGE, "0,16384,1"), "set_patch_margin", "get_patch_margin", MARGIN_BOTTOM);
	ADD_GROUP("Axis Stretch", "axis_stretch_");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "axis_stretch_horizontal", PROPERTY_HINT_ENUM, "Stretch,Tile,Tile Fit"), "set_h_axis_stretch_mode", "get_h_axis_stretch_mode");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "axis_stretch_vertical", PROPERTY_HINT_ENUM, "Stretch,Tile,Tile Fit"), "set_v_axis_stretch_mode", "get_v_axis_stretch_mode");

	BIND_ENUM_CONSTANT(AXIS_STRETCH_MODE_STRETCH);
	BIND_ENUM_CONSTANT(AXIS_STRETCH_MODE_TILE);
	BIND_ENUM_CONSTANT(AXIS_STRETCH_MODE_TILE_FIT);
}

void NinePatchRect::set_texture(const Ref<Texture> &p_tex) {
	if (texture == p_tex) {
		return;
	}
	texture = p_tex;
	update();
	/*
	if (texture.is_valid())
		texture->set_flags(texture->get_flags()&(~Texture::FLAG_REPEAT)); //remove repeat from texture, it looks bad in sprites
	*/
	minimum_size_changed();
	emit_signal("texture_changed");
	_change_notify("texture");
}

Ref<Texture> NinePatchRect::get_texture() const {
	return texture;
}

void NinePatchRect::set_patch_margin(Margin p_margin, int p_size) {
	ERR_FAIL_INDEX((int)p_margin, 4);
	margin[p_margin] = p_size;
	update();
	minimum_size_changed();
	switch (p_margin) {
		case MARGIN_LEFT:
			_change_notify("patch_margin_left");
			break;
		case MARGIN_TOP:
			_change_notify("patch_margin_top");
			break;
		case MARGIN_RIGHT:
			_change_notify("patch_margin_right");
			break;
		case MARGIN_BOTTOM:
			_change_notify("patch_margin_bottom");
			break;
	}
}

int NinePatchRect::get_patch_margin(Margin p_margin) const {
	ERR_FAIL_INDEX_V((int)p_margin, 4, 0);
	return margin[p_margin];
}

void NinePatchRect::set_region_rect(const Rect2 &p_region_rect) {
	if (region_rect == p_region_rect) {
		return;
	}

	region_rect = p_region_rect;

	item_rect_changed();
	_change_notify("region_rect");
}

Rect2 NinePatchRect::get_region_rect() const {
	return region_rect;
}

void NinePatchRect::set_draw_center(bool p_enabled) {
	draw_center = p_enabled;
	update();
}

bool NinePatchRect::is_draw_center_enabled() const {
	return draw_center;
}

void NinePatchRect::set_h_axis_stretch_mode(AxisStretchMode p_mode) {
	axis_h = p_mode;
	update_configuration_warning();
	update();
}

NinePatchRect::AxisStretchMode NinePatchRect::get_h_axis_stretch_mode() const {
	return axis_h;
}

void NinePatchRect::set_v_axis_stretch_mode(AxisStretchMode p_mode) {
	axis_v = p_mode;
	update_configuration_warning();
	update();
}

NinePatchRect::AxisStretchMode NinePatchRect::get_v_axis_stretch_mode() const {
	return axis_v;
}

String NinePatchRect::get_configuration_warning() const {
	String warning = Control::get_configuration_warning();

	if (String(GLOBAL_GET("rendering/quality/driver/driver_name")) == "GLES2") {
		if (axis_v > AXIS_STRETCH_MODE_STRETCH || axis_h > AXIS_STRETCH_MODE_STRETCH) {
			if (!warning.empty()) {
				warning += "\n\n";
			}
			warning += TTR("The Tile and Tile Fit options for Axis Stretch properties are only effective when using the GLES3 rendering backend.\nThe GLES2 backend is currently in use, so these modes will act like Stretch instead.");
		}
	}

	return warning;
}

NinePatchRect::NinePatchRect() {
	margin[MARGIN_LEFT] = 0;
	margin[MARGIN_RIGHT] = 0;
	margin[MARGIN_BOTTOM] = 0;
	margin[MARGIN_TOP] = 0;

	set_mouse_filter(MOUSE_FILTER_IGNORE);
	draw_center = true;

	axis_h = AXIS_STRETCH_MODE_STRETCH;
	axis_v = AXIS_STRETCH_MODE_STRETCH;
}

NinePatchRect::~NinePatchRect() {
}