//

// Created by Alan Freitas on 2020-07-07.

//

#include <cmath>

#include <matplot/axes_objects/line.h>

#include <matplot/core/axes.h>

#include <matplot/util/common.h>

#include <regex>

#include <sstream>

namespace matplot {

line::line(class axes *parent) : axes_object(parent) {}

line::line(class axes *parent, const std::vector<double> &y_data,

const std::string &line_spec)

: axes_object(parent), y_data_(y_data), line_spec_(this, line_spec) {}

line::line(class axes *parent, const std::vector<double> &x_data,

const std::vector<double> &y_data, const std::string &line_spec)

: axes_object(parent), x_data_(x_data), y_data_(y_data),

line_spec_(this, line_spec) {}

line::line(class axes *parent, const std::vector<double> &x_data,

const std::vector<double> &y_data,

const std::vector<double> &z_data, const std::string &line_spec)

: axes_object(parent), x_data_(x_data), y_data_(y_data),

z_data_(z_data), line_spec_(this, line_spec) {}

std::vector<line_spec::style_to_plot> line::styles_to_plot() {

std::vector<line_spec::style_to_plot> result;

// if it has a line...

if (line_spec_.has_line()) {

// ...and a marker

if (line_spec_.has_non_custom_marker()) {

if (line_spec_.line_and_marker_are_the_same_color()) {

if (marker_indices_.empty()) {

result.emplace_back(

line_spec::style_to_plot::plot_line_and_marker);

} else {

result.emplace_back(

line_spec::style_to_plot::plot_line_only);

result.emplace_back(

line_spec::style_to_plot::plot_marker_only);

}

} else {

result.emplace_back(

line_spec::style_to_plot::plot_line_only);

result.emplace_back(

line_spec::style_to_plot::plot_marker_only);

}

if (line_spec_.marker_face()) {

if (!line_spec_.marker_and_face_are_the_same_color()) {

result.emplace_back(

line_spec::style_to_plot::plot_marker_face_only);

}

}

} else {

// ...and no marker

result.emplace_back(line_spec::style_to_plot::plot_line_only);

}

} else {

// ...only a marker

if (line_spec_.has_non_custom_marker()) {

result.emplace_back(line_spec::style_to_plot::plot_marker_only);

if (line_spec_.marker_face() &&

!line_spec_.marker_and_face_are_the_same_color()) {

result.emplace_back(

line_spec::style_to_plot::plot_marker_face_only);

}

} else {

// has nothing, fallback to a solid line

result.emplace_back(line_spec::style_to_plot::plot_line_only);

}

}

// if we draw the line as impulse

if (impulse_ || fill_) {

// we cannot plot the line and marker together

auto it = std::find(result.begin(), result.end(),

line_spec::style_to_plot::plot_line_and_marker);

if (it != result.end()) {

result.erase(it);

result.emplace_back(line_spec::style_to_plot::plot_line_only);

result.emplace_back(line_spec::style_to_plot::plot_marker_only);

}

}

return result;

}

std::string line::plot_string() {

maybe_update_line_spec();

std::string res;

bool first = true;

for (const auto &style : styles_to_plot()) {

if (!first) {

res += ",";

}

const bool marker_size_is_variable = !marker_sizes_.empty();

const bool we_are_plotting_marker =

style != line_spec::style_to_plot::plot_line_only;

std::string str;

if (impulse_ && style == line_spec::style_to_plot::plot_line_only) {

str =

" '-' with impulse " + line_spec_.plot_string(style, false);

} else if (fill_ &&

style == line_spec::style_to_plot::plot_line_only) {

str = " '-' with filledcurves " +

line_spec_.plot_string(style, false);

} else {

str = " '-' " + line_spec_.plot_string(style, true);

}

if (marker_size_is_variable && we_are_plotting_marker) {

str = std::regex_replace(str,

std::regex(" pointsize \\d*\\.?\\d* "),

" pointsize variable ");

}

const bool color_is_variable = !marker_colors_.empty();

if (color_is_variable && we_are_plotting_marker) {

str = std::regex_replace(str,

std::regex(" linecolor rgb +[^ ]+ "),

" linecolor palette ");

}

if (use_y2_) {

str += " axes x1y2";

}

res += str;

if (first) {

first = false;

}

}

return res;

}

std::string line::legend_string(const std::string &title) {

if (line_spec_.has_line() && line_spec_.has_non_custom_marker()) {

return " keyentry " +

line_spec_.plot_string(

line_spec::style_to_plot::plot_line_and_marker) +

" title \"" + escape(title) + "\"";

} else if (line_spec_.has_line()) {

return " keyentry " +

line_spec_.plot_string(

line_spec::style_to_plot::plot_line_only) +

" title \"" + escape(title) + "\"";

} else {

return " keyentry " +

line_spec_.plot_string(

line_spec::style_to_plot::plot_marker_only) +

" title \"" + escape(title) + "\"";

}

}

std::string line::data_string() {

const bool markers_are_automatic = marker_indices_.empty();

const bool has_line_and_marker =

line_spec_.has_line() && line_spec_.has_non_custom_marker();

const bool can_plot_together =

markers_are_automatic &&

line_spec_.can_plot_line_and_marker_together() &&

has_line_and_marker;

const bool needs_to_plot_twice =

!can_plot_together && has_line_and_marker;

size_t repetitions = 1 + needs_to_plot_twice;

const bool x_is_manual = !x_data_.empty();

std::stringstream ss;

for (const auto &style : styles_to_plot()) {

if (visible_) {

const bool data_is_for_markers =

style == line_spec::style_to_plot::plot_marker_only ||

style == line_spec::style_to_plot::plot_marker_face_only;

const bool only_at_marker_indices =

!markers_are_automatic && data_is_for_markers;

const size_t n_points = only_at_marker_indices

? marker_indices_.size()

: y_data_.size();

const bool marker_size_is_variable = !marker_sizes_.empty();

const bool we_are_plotting_markers =

style != line_spec::style_to_plot::plot_line_only;

const bool include_marker_size =

marker_size_is_variable && we_are_plotting_markers;

const double marker_size_denominator =

style == line_spec::style_to_plot::plot_marker_face_only

? 10

: 6;

const bool color_is_variable = !marker_colors_.empty();

const bool include_marker_color =

color_is_variable && we_are_plotting_markers;

for (size_t i = 0; i < n_points; ++i) {

size_t index =

only_at_marker_indices ? marker_indices_[i] : i;

double x_value = x_is_manual ? x_data_[index] : index + 1;

if (!std::isfinite(x_value) || !std::isfinite(y_data_[i])) {

ss << " \n";

continue;

}

ss << " " << x_value;

ss << " " << y_data_[index];

if (is_3d()) {

ss << " " << z_data_[index];

}

if (include_marker_size) {

ss << " "

<< marker_sizes_[index] / marker_size_denominator;

}

if (include_marker_color) {

ss << " " << marker_colors_[index];

}

ss << " \n";

}

}

ss << " "

<< "e\n";

}

return ss.str();

}

void line::maybe_update_line_spec() {

if (line_spec_.has_line() && !line_spec_.user_color()) {

// if user didn't set the color, get color from xlim

auto c = parent_->get_color_and_bump();

line_spec_.color(c);

} else if (line_spec_.has_non_custom_marker() &&

!line_spec_.user_color() &&

!line_spec_.marker_user_color()) {

auto c = parent_->get_color_and_bump();

line_spec_.marker_color(c);

}

}

double line::xmax() {

if (!is_polar()) {

if (x_data_.empty()) {

if (!y_data_.empty()) {

return y_data_.size() - 1;

} else {

return axes_object::xmax();

}

}

return *std::max_element(x_data_.begin(), x_data_.end());

} else {

// y = rho

if (parent_->r_axis().limits_mode_manual()) {

return +(parent_->r_axis().limits()[1] -

parent_->r_axis().limits()[0]);

}

auto [min_rho, max_rho] =

std::minmax_element(y_data_.begin(), y_data_.end());

if (max_rho != y_data_.end() && min_rho != y_data_.end()) {

return +round_polar_max(std::abs(*max_rho));

} else {

return 1;

}

}

}

double line::xmin() {

if (!is_polar()) {

if (x_data_.empty()) {

if (!y_data_.empty()) {

return 0;

} else {

return axes_object::xmin();

}

}

return *std::min_element(x_data_.begin(), x_data_.end());

} else {

// y = rho

if (parent_->r_axis().limits_mode_manual()) {

return -(parent_->r_axis().limits()[1] -

parent_->r_axis().limits()[0]);

}

auto [min_rho, max_rho] =

std::minmax_element(y_data_.begin(), y_data_.end());

if (max_rho != y_data_.end() && min_rho != y_data_.end()) {

return -round_polar_max(std::abs(*max_rho));

} else {

return -1;

}

}

}

double line::ymax() {

if (!is_polar()) {

if (y_data_.empty()) {

return axes_object::ymax();

}

return *std::max_element(y_data_.begin(), y_data_.end());

} else {

// y = rho

if (parent_->r_axis().limits_mode_manual()) {

return +(parent_->r_axis().limits()[1] -

parent_->r_axis().limits()[0]);

}

auto [min_rho, max_rho] =

std::minmax_element(y_data_.begin(), y_data_.end());

if (max_rho != y_data_.end() && min_rho != y_data_.end()) {

return +round_polar_max(std::abs(*max_rho));

} else {

return 1;

}

}

}

double line::ymin() {

if (!is_polar()) {

if (y_data_.empty()) {

return axes_object::ymin();

}

return *std::min_element(y_data_.begin(), y_data_.end());

} else {

// y = rho

if (parent_->r_axis().limits_mode_manual()) {

return -(parent_->r_axis().limits()[1] -

parent_->r_axis().limits()[0]);

}

auto [min_rho, max_rho] =

std::minmax_element(y_data_.begin(), y_data_.end());

if (max_rho != y_data_.end() && min_rho != y_data_.end()) {

return -round_polar_max(std::abs(*max_rho));

} else {

return -1;

}

}

}

enum axes_object::axes_category line::axes_category() {

if (z_data_.empty()) {

if (!polar_) {

return axes_object::axes_category::two_dimensional;

} else {

return axes_object::axes_category::polar;

}

} else {

return axes_object::axes_category::three_dimensional;

}

}

bool line::requires_colormap() { return !marker_colors_.empty(); }

class line &line::line_style(const std::string &str) {

line_spec_.parse_string(str);

touch();

return *this;

}

const line_spec &line::line_spec() const { return line_spec_; }

line_spec &line::line_spec() { return line_spec_; }

class line &line::line_spec(const class line_spec &line_spec) {

line_spec_ = line_spec;

touch();

return *this;

}

const std::vector<double> &line::y_data() const { return y_data_; }

class line &line::y_data(const std::vector<double> &y_data) {

y_data_ = y_data;

touch();

return *this;

}

const std::vector<double> &line::x_data() const { return x_data_; }

class line &line::x_data(const std::vector<double> &x_data) {

x_data_ = x_data;

touch();

return *this;

}

const std::vector<double> &line::z_data() const { return z_data_; }

class line &line::z_data(const std::vector<double> &z_data) {

z_data_ = z_data;

touch();

return *this;

}

const std::vector<size_t> &line::marker_indices() const {

return marker_indices_;

}

class line &

line::marker_indices(const std::vector<size_t> &marker_indices) {

marker_indices_ = marker_indices;

touch();

return *this;

}

bool line::visible() const { return visible_; }

class line &line::visible(bool visible) {

visible_ = visible;

touch();

return *this;

}

float line::line_width() const { return line_spec().line_width(); }

class line &line::line_width(float line_width) {

line_spec().line_width(line_width);

return *this;

}

enum line_spec::marker_style line::marker_style() const {

return line_spec().marker();

}

enum line_spec::marker_style line::marker() const {

return line_spec().marker();

}

float line::marker_size() const { return line_spec().marker_size(); }

class line &line::marker_size(float size) {

line_spec().marker_size(size);

return *this;

}

class line &line::marker_size(const std::vector<float> &size_vector) {

marker_sizes_ = size_vector;

touch();

return *this;

}

class line &line::marker_size(const std::vector<double> &size_vector) {

std::vector<float> size_vector_float(size_vector.begin(),

size_vector.end());

marker_size(size_vector_float);

return *this;

}

bool line::marker_face() const { return line_spec().marker_face(); }

class line &line::marker_face(bool marker_face) {

line_spec().marker_face(marker_face);

return *this;

}

const std::array<float, 4> &line::color() const {

return line_spec().color();

}

const std::array<float, 4> &line::marker_color() const {

return line_spec().marker_color();

}

const std::array<float, 4> &line::marker_face_color() const {

return line_spec().marker_face_color();

}

bool line::use_y2() const { return use_y2_; }

class line &line::use_y2(bool use_y_2) {

use_y2_ = use_y_2;

if (!parent()->y2_axis().visible()) {

parent()->y2_axis().visible(true);

parent()->y_axis().color(parent()->colororder()[0]);

parent()->y2_axis().color(parent()->colororder()[1]);

}

touch();

return *this;

}

bool line::impulse() const { return impulse_; }

class line &line::impulse(bool impulse) {

impulse_ = impulse;

touch();

return *this;

}

bool line::fill() const { return fill_; }

class line &line::fill(bool fill) {

fill_ = fill;

touch();

return *this;

}

bool line::use_y_2() const { return use_y2_; }

class line &line::use_y_2(bool use_y_2) {

use_y2_ = use_y_2;

touch();

return *this;

}

bool line::polar() const { return polar_; }

class line &line::polar(bool polar) {

polar_ = polar;

touch();

return *this;

}

void line::run_draw_commands() {

// ask axes to draw the line

maybe_update_line_spec();

parent_->draw_path(x_data_,y_data_,line_spec_.color());

}

} // namespace matplot