#include <cxxtest/TestSuite.h>

#include "svg/svg.h"

#include "streq.h"

#include <2geom/affine.h>

#include <algorithm>

#include <glib.h>

#include <iostream>

#include <math.h>

#include <utility>

class SvgAffineTest : public CxxTest::TestSuite

{

private:

struct test_t {

char const * str;

Geom::Affine matrix;

};

struct approx_equal_pred {

bool operator()(Geom::Affine const &ref, Geom::Affine const &cm) const

{

double maxabsdiff = 0;

for(size_t i=0; i<6; i++) {

maxabsdiff = std::max(std::abs(ref[i]-cm[i]), maxabsdiff);

}

return maxabsdiff < 1e-14;

}

};

static test_t const read_matrix_tests[3];

static test_t const read_translate_tests[3];

static test_t const read_scale_tests[3];

static test_t const read_rotate_tests[4];

static test_t const read_skew_tests[3];

static char const * const read_fail_tests[25];

static test_t const write_matrix_tests[2];

static test_t const write_translate_tests[3];

static test_t const write_scale_tests[2];

static test_t const write_rotate_tests[2];

static test_t const write_skew_tests[3];

public:

SvgAffineTest() {

}

static SvgAffineTest *createSuite() { return new SvgAffineTest(); }

static void destroySuite( SvgAffineTest *suite ) { delete suite; }

void testReadIdentity()

{

char const* strs[] = {

//0,

"",

"matrix(1,0,0,1,0,0)",

"translate(0,0)",

"scale(1,1)",

"rotate(0,0,0)",

"skewX(0)",

"skewY(0)"};

size_t n = G_N_ELEMENTS(strs);

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

Geom::Affine cm;

TSM_ASSERT(strs[i] , sp_svg_transform_read(strs[i], &cm));

TSM_ASSERT_EQUALS(strs[i] , Geom::identity() , cm);

}

}

void testWriteIdentity()

{

TS_ASSERT_EQUALS(sp_svg_transform_write(Geom::identity()) , (void*)0)

}

void testReadMatrix()

{

for(size_t i=0; i<G_N_ELEMENTS(read_matrix_tests); i++) {

Geom::Affine cm;

TSM_ASSERT(read_matrix_tests[i].str , sp_svg_transform_read(read_matrix_tests[i].str, &cm));

TSM_ASSERT_RELATION(read_matrix_tests[i].str , approx_equal_pred , read_matrix_tests[i].matrix , cm);

}

}

void testReadTranslate()

{

for(size_t i=0; i<G_N_ELEMENTS(read_translate_tests); i++) {

Geom::Affine cm;

TSM_ASSERT(read_translate_tests[i].str , sp_svg_transform_read(read_translate_tests[i].str, &cm));

TSM_ASSERT_RELATION(read_translate_tests[i].str , approx_equal_pred , read_translate_tests[i].matrix , cm);

}

}

void testReadScale()

{

for(size_t i=0; i<G_N_ELEMENTS(read_scale_tests); i++) {

Geom::Affine cm;

TSM_ASSERT(read_scale_tests[i].str , sp_svg_transform_read(read_scale_tests[i].str, &cm));

TSM_ASSERT_RELATION(read_scale_tests[i].str , approx_equal_pred , read_scale_tests[i].matrix , cm);

}

}

void testReadRotate()

{

for(size_t i=0; i<G_N_ELEMENTS(read_rotate_tests); i++) {

Geom::Affine cm;

TSM_ASSERT(read_rotate_tests[i].str , sp_svg_transform_read(read_rotate_tests[i].str, &cm));

TSM_ASSERT_RELATION(read_rotate_tests[i].str , approx_equal_pred , read_rotate_tests[i].matrix , cm);

}

}

void testReadSkew()

{

for(size_t i=0; i<G_N_ELEMENTS(read_skew_tests); i++) {

Geom::Affine cm;

TSM_ASSERT(read_skew_tests[i].str , sp_svg_transform_read(read_skew_tests[i].str, &cm));

TSM_ASSERT_RELATION(read_skew_tests[i].str , approx_equal_pred , read_skew_tests[i].matrix , cm);

}

}

void testWriteMatrix()

{

for(size_t i=0; i<G_N_ELEMENTS(write_matrix_tests); i++) {

char * str = sp_svg_transform_write(write_matrix_tests[i].matrix);

TS_ASSERT_RELATION(streq_rel , str , write_matrix_tests[i].str);

g_free(str);

}

}

void testWriteTranslate()

{

for(size_t i=0; i<G_N_ELEMENTS(write_translate_tests); i++) {

char * str = sp_svg_transform_write(write_translate_tests[i].matrix);

TS_ASSERT_RELATION(streq_rel , str , write_translate_tests[i].str);

g_free(str);

}

}

void testWriteScale()

{

for(size_t i=0; i<G_N_ELEMENTS(write_scale_tests); i++) {

char * str = sp_svg_transform_write(write_scale_tests[i].matrix);

TS_ASSERT_RELATION(streq_rel , str , write_scale_tests[i].str);

g_free(str);

}

}

void testWriteRotate()

{

for(size_t i=0; i<G_N_ELEMENTS(write_rotate_tests); i++) {

char * str = sp_svg_transform_write(write_rotate_tests[i].matrix);

TS_ASSERT_RELATION(streq_rel , str , write_rotate_tests[i].str);

g_free(str);

}

}

void testWriteSkew()

{

for(size_t i=0; i<G_N_ELEMENTS(write_skew_tests); i++) {

char * str = sp_svg_transform_write(write_skew_tests[i].matrix);

TS_ASSERT_RELATION(streq_rel , str , write_skew_tests[i].str);

g_free(str);

}

}

void testReadConcatenation()

{

// NOTE: According to the SVG specification (see the syntax at http://www.w3.org/TR/SVG/coords.html#TransformAttribute

// there should be 1 or more comma-wsp sequences between transforms... This doesn't make sense and it seems

// likely that instead of a + they meant a ? (zero or one comma-wsp sequences).

char const * str = "skewY(17)skewX(9)translate(7,13)scale(2)rotate(13)translate(3,5)";

Geom::Affine ref(2.0199976232558053, 1.0674773585906016, -0.14125199392774669, 1.9055550612095459, 14.412730624347654, 28.499820929377454); // Precomputed using Mathematica

Geom::Affine cm;

TS_ASSERT(sp_svg_transform_read(str, &cm));

TS_ASSERT_RELATION(approx_equal_pred , ref , cm);

}

void testReadFailures()

{

for(size_t i=0; i<G_N_ELEMENTS(read_fail_tests); i++) {

Geom::Affine cm;

TSM_ASSERT(read_fail_tests[i] , !sp_svg_transform_read(read_fail_tests[i], &cm));

}

}

};

static double const DEGREE = M_PI/180.;

SvgAffineTest::test_t const SvgAffineTest::read_matrix_tests[3] = {

{"matrix(0,0,0,0,0,0)",Geom::Affine(0,0,0,0,0,0)},

{" matrix(1,2,3,4,5,6)",Geom::Affine(1,2,3,4,5,6)},

{"matrix (1 2 -3,-4,5e6,-6e-7)",Geom::Affine(1,2,-3,-4,5e6,-6e-7)}};

SvgAffineTest::test_t const SvgAffineTest::read_translate_tests[3] = {

{"translate(1)",Geom::Affine(1,0,0,1,1,0)},

{"translate(1,1)",Geom::Affine(1,0,0,1,1,1)},

{"translate(-1e3 .123e2)",Geom::Affine(1,0,0,1,-1e3,.123e2)}};

SvgAffineTest::test_t const SvgAffineTest::read_scale_tests[3] = {

{"scale(2)",Geom::Affine(2,0,0,2,0,0)},

{"scale(2,3)",Geom::Affine(2,0,0,3,0,0)},

{"scale(0.1e-2 -.475e0)",Geom::Affine(0.1e-2,0,0,-.475e0,0,0)}};

SvgAffineTest::test_t const SvgAffineTest::read_rotate_tests[4] = {

{"rotate(13 )",Geom::Affine(cos(13.*DEGREE),sin(13.*DEGREE),-sin(13.*DEGREE),cos(13.*DEGREE),0,0)},

{"rotate(-13)",Geom::Affine(cos(-13.*DEGREE),sin(-13.*DEGREE),-sin(-13.*DEGREE),cos(-13.*DEGREE),0,0)},

{"rotate(373)",Geom::Affine(cos(13.*DEGREE),sin(13.*DEGREE),-sin(13.*DEGREE),cos(13.*DEGREE),0,0)},

{"rotate(13,7,11)",Geom::Affine(cos(13.*DEGREE),sin(13.*DEGREE),-sin(13.*DEGREE),cos(13.*DEGREE),(1-cos(13.*DEGREE))*7+sin(13.*DEGREE)*11,(1-cos(13.*DEGREE))*11-sin(13.*DEGREE)*7)}};

SvgAffineTest::test_t const SvgAffineTest::read_skew_tests[3] = {

{"skewX( 30)",Geom::Affine(1,0,tan(30.*DEGREE),1,0,0)},

{"skewX(-30)",Geom::Affine(1,0,tan(-30.*DEGREE),1,0,0)},

{"skewY(390)",Geom::Affine(1,tan(30.*DEGREE),0,1,0,0)}};

char const * const SvgAffineTest::read_fail_tests[25] = {

"matrix((1,2,3,4,5,6)",

"matrix((1,2,3,4,5,6))",

"matrix(1,2,3,4,5,6))",

"matrix(,1,2,3,4,5,6)",

"matrix(1,2,3,4,5,6,)",

"matrix(1,2,3,4,5,)",

"matrix(1,2,3,4,5)",

"matrix(1,2,3,4,5e6-3)", // Here numbers HAVE to be separated by a comma-wsp sequence

"matrix(1,2,3,4,5e6.3)", // Here numbers HAVE to be separated by a comma-wsp sequence

"translate()",

"translate(,)",

"translate(1,)",

"translate(1,6,)",

"translate(1,6,0)",

"scale()",

"scale(1,6,2)",

"rotate()",

"rotate(1,6)",

"rotate(1,6,)",

"rotate(1,6,3,4)",

"skewX()",

"skewX(-)",

"skewX(.)",

"skewY(,)",

"skewY(1,2)"};

SvgAffineTest::test_t const SvgAffineTest::write_matrix_tests[2] = {

{"matrix(1,2,3,4,5,6)",Geom::Affine(1,2,3,4,5,6)},

{"matrix(-1,2123,3,0.4,1e-8,1e20)",Geom::Affine(-1,2.123e3,3+1e-14,0.4,1e-8,1e20)}};

SvgAffineTest::test_t const SvgAffineTest::write_translate_tests[3] = {

{"translate(1,1)",Geom::Affine(1,0,0,1,1,1)},

{"translate(1)",Geom::Affine(1,0,0,1,1,0)},

{"translate(-1345,0.123)",Geom::Affine(1,0,0,1,-1.345e3,.123)}};

SvgAffineTest::test_t const SvgAffineTest::write_scale_tests[2] = {

{"scale(0)",Geom::Affine(0,0,0,0,0,0)},

{"scale(2,3)",Geom::Affine(2,0,0,3,0,0)}};

SvgAffineTest::test_t const SvgAffineTest::write_rotate_tests[2] = {

{"rotate(13)",Geom::Affine(cos(13.*DEGREE),sin(13.*DEGREE),-sin(13.*DEGREE),cos(13.*DEGREE),0,0)},

{"rotate(-13,7,11)",Geom::Affine(cos(-13.*DEGREE),sin(-13.*DEGREE),-sin(-13.*DEGREE),cos(-13.*DEGREE),(1-cos(-13.*DEGREE))*7+sin(-13.*DEGREE)*11,(1-cos(-13.*DEGREE))*11-sin(-13.*DEGREE)*7)}};

SvgAffineTest::test_t const SvgAffineTest::write_skew_tests[3] = {

{"skewX(30)",Geom::Affine(1,0,tan(30.*DEGREE),1,0,0)},

{"skewX(-30)",Geom::Affine(1,0,tan(-30.*DEGREE),1,0,0)},

{"skewY(30)",Geom::Affine(1,tan(30.*DEGREE),0,1,0,0)}};