#include "sass.hpp"
#include "functions.hpp"
#include "ast.hpp"
#include "context.hpp"
#include "backtrace.hpp"
#include "parser.hpp"
#include "constants.hpp"
#include "inspect.hpp"
#include "extend.hpp"
#include "eval.hpp"
#include "util.hpp"
#include "expand.hpp"
#include "utf8_string.hpp"
#include "sass/base.h"
#include "utf8.h"
#include <cstdint>
#include <cstdlib>
#include <cmath>
#include <cctype>
#include <sstream>
#include <string>
#include <iomanip>
#include <iostream>
#include <random>
#include <set>
#ifdef __MINGW32__
#include "windows.h"
#include "wincrypt.h"
#endif
#define ARG(argname, argtype) get_arg<argtype>(argname, env, sig, pstate, backtrace)
#define ARGR(argname, argtype, lo, hi) get_arg_r(argname, env, sig, pstate, lo, hi, backtrace)
#define ARGM(argname, argtype, ctx) get_arg_m(argname, env, sig, pstate, backtrace, ctx)
namespace Sass {
using std::stringstream;
using std::endl;
Definition_Ptr make_native_function(Signature sig, Native_Function func, Context& ctx)
{
Parser sig_parser = Parser::from_c_str(sig, ctx, ParserState("[built-in function]"));
sig_parser.lex<Prelexer::identifier>();
std::string name(Util::normalize_underscores(sig_parser.lexed));
Parameters_Obj params = sig_parser.parse_parameters();
return SASS_MEMORY_NEW(Definition,
ParserState("[built-in function]"),
sig,
name,
params,
func,
false);
}
Definition_Ptr make_c_function(Sass_Function_Entry c_func, Context& ctx)
{
using namespace Prelexer;
const char* sig = sass_function_get_signature(c_func);
Parser sig_parser = Parser::from_c_str(sig, ctx, ParserState("[c function]"));
// allow to overload generic callback plus @warn, @error and @debug with custom functions
sig_parser.lex < alternatives < identifier, exactly <'*'>,
exactly < Constants::warn_kwd >,
exactly < Constants::error_kwd >,
exactly < Constants::debug_kwd >
> >();
std::string name(Util::normalize_underscores(sig_parser.lexed));
Parameters_Obj params = sig_parser.parse_parameters();
return SASS_MEMORY_NEW(Definition,
ParserState("[c function]"),
sig,
name,
params,
c_func,
false, true);
}
std::string function_name(Signature sig)
{
std::string str(sig);
return str.substr(0, str.find('('));
}
namespace Functions {
inline void handle_utf8_error (const ParserState& pstate, Backtrace* backtrace)
{
try {
throw;
}
catch (utf8::invalid_code_point) {
std::string msg("utf8::invalid_code_point");
error(msg, pstate, backtrace);
}
catch (utf8::not_enough_room) {
std::string msg("utf8::not_enough_room");
error(msg, pstate, backtrace);
}
catch (utf8::invalid_utf8) {
std::string msg("utf8::invalid_utf8");
error(msg, pstate, backtrace);
}
catch (...) { throw; }
}
template <typename T>
T* get_arg(const std::string& argname, Env& env, Signature sig, ParserState pstate, Backtrace* backtrace)
{
// Minimal error handling -- the expectation is that built-ins will be written correctly!
T* val = Cast<T>(env[argname]);
if (!val) {
std::string msg("argument `");
msg += argname;
msg += "` of `";
msg += sig;
msg += "` must be a ";
msg += T::type_name();
error(msg, pstate, backtrace);
}
return val;
}
Map_Ptr get_arg_m(const std::string& argname, Env& env, Signature sig, ParserState pstate, Backtrace* backtrace, Context& ctx)
{
// Minimal error handling -- the expectation is that built-ins will be written correctly!
Map_Ptr val = Cast<Map>(env[argname]);
if (val) return val;
List_Ptr lval = Cast<List>(env[argname]);
if (lval && lval->length() == 0) return SASS_MEMORY_NEW(Map, pstate, 0);
// fallback on get_arg for error handling
val = get_arg<Map>(argname, env, sig, pstate, backtrace);
return val;
}
Number_Ptr get_arg_r(const std::string& argname, Env& env, Signature sig, ParserState pstate, double lo, double hi, Backtrace* backtrace)
{
// Minimal error handling -- the expectation is that built-ins will be written correctly!
Number_Ptr val = get_arg<Number>(argname, env, sig, pstate, backtrace);
double v = val->value();
if (!(lo <= v && v <= hi)) {
std::stringstream msg;
msg << "argument `" << argname << "` of `" << sig << "` must be between ";
msg << lo << " and " << hi;
error(msg.str(), pstate, backtrace);
}
return val;
}
#define ARGSEL(argname, seltype, contextualize) get_arg_sel<seltype>(argname, env, sig, pstate, backtrace, ctx)
template <typename T>
T get_arg_sel(const std::string& argname, Env& env, Signature sig, ParserState pstate, Backtrace* backtrace, Context& ctx);
template <>
Selector_List_Obj get_arg_sel(const std::string& argname, Env& env, Signature sig, ParserState pstate, Backtrace* backtrace, Context& ctx) {
Expression_Obj exp = ARG(argname, Expression);
if (exp->concrete_type() == Expression::NULL_VAL) {
std::stringstream msg;
msg << argname << ": null is not a valid selector: it must be a string,\n";
msg << "a list of strings, or a list of lists of strings for `" << function_name(sig) << "'";
error(msg.str(), pstate);
}
if (String_Constant_Ptr str = Cast<String_Constant>(exp)) {
str->quote_mark(0);
}
std::string exp_src = exp->to_string(ctx.c_options);
return Parser::parse_selector(exp_src.c_str(), ctx);
}
template <>
Compound_Selector_Obj get_arg_sel(const std::string& argname, Env& env, Signature sig, ParserState pstate, Backtrace* backtrace, Context& ctx) {
Expression_Obj exp = ARG(argname, Expression);
if (exp->concrete_type() == Expression::NULL_VAL) {
std::stringstream msg;
msg << argname << ": null is not a string for `" << function_name(sig) << "'";
error(msg.str(), pstate);
}
if (String_Constant_Ptr str = Cast<String_Constant>(exp)) {
str->quote_mark(0);
}
std::string exp_src = exp->to_string(ctx.c_options);
Selector_List_Obj sel_list = Parser::parse_selector(exp_src.c_str(), ctx);
if (sel_list->length() == 0) return NULL;
Complex_Selector_Obj first = sel_list->first();
if (!first->tail()) return first->head();
return first->tail()->head();
}
#ifdef __MINGW32__
uint64_t GetSeed()
{
HCRYPTPROV hp = 0;
BYTE rb[8];
CryptAcquireContext(&hp, 0, 0, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT);
CryptGenRandom(hp, sizeof(rb), rb);
CryptReleaseContext(hp, 0);
uint64_t seed;
memcpy(&seed, &rb[0], sizeof(seed));
return seed;
}
#else
uint64_t GetSeed()
{
std::random_device rd;
return rd();
}
#endif
// note: the performance of many implementations of
// random_device degrades sharply once the entropy pool
// is exhausted. For practical use, random_device is
// generally only used to seed a PRNG such as mt19937.
static std::mt19937 rand(static_cast<unsigned int>(GetSeed()));
// features
static std::set<std::string> features {
"global-variable-shadowing",
"extend-selector-pseudoclass",
"at-error",
"units-level-3"
};
////////////////
// RGB FUNCTIONS
////////////////
inline double color_num(Number_Ptr n) {
if (n->unit() == "%") {
return std::min(std::max(n->value() * 255 / 100.0, 0.0), 255.0);
} else {
return std::min(std::max(n->value(), 0.0), 255.0);
}
}
inline double alpha_num(Number_Ptr n) {
if (n->unit() == "%") {
return std::min(std::max(n->value(), 0.0), 100.0);
} else {
return std::min(std::max(n->value(), 0.0), 1.0);
}
}
Signature rgb_sig = "rgb($red, $green, $blue)";
BUILT_IN(rgb)
{
return SASS_MEMORY_NEW(Color,
pstate,
color_num(ARG("$red", Number)),
color_num(ARG("$green", Number)),
color_num(ARG("$blue", Number)));
}
Signature rgba_4_sig = "rgba($red, $green, $blue, $alpha)";
BUILT_IN(rgba_4)
{
return SASS_MEMORY_NEW(Color,
pstate,
color_num(ARG("$red", Number)),
color_num(ARG("$green", Number)),
color_num(ARG("$blue", Number)),
alpha_num(ARG("$alpha", Number)));
}
Signature rgba_2_sig = "rgba($color, $alpha)";
BUILT_IN(rgba_2)
{
Color_Ptr c_arg = ARG("$color", Color);
Color_Ptr new_c = SASS_MEMORY_COPY(c_arg);
new_c->a(alpha_num(ARG("$alpha", Number)));
new_c->disp("");
return new_c;
}
Signature red_sig = "red($color)";
BUILT_IN(red)
{ return SASS_MEMORY_NEW(Number, pstate, ARG("$color", Color)->r()); }
Signature green_sig = "green($color)";
BUILT_IN(green)
{ return SASS_MEMORY_NEW(Number, pstate, ARG("$color", Color)->g()); }
Signature blue_sig = "blue($color)";
BUILT_IN(blue)
{ return SASS_MEMORY_NEW(Number, pstate, ARG("$color", Color)->b()); }
Signature mix_sig = "mix($color-1, $color-2, $weight: 50%)";
BUILT_IN(mix)
{
Color_Obj color1 = ARG("$color-1", Color);
Color_Obj color2 = ARG("$color-2", Color);
Number_Obj weight = ARGR("$weight", Number, 0, 100);
double p = weight->value()/100;
double w = 2*p - 1;
double a = color1->a() - color2->a();
double w1 = (((w * a == -1) ? w : (w + a)/(1 + w*a)) + 1)/2.0;
double w2 = 1 - w1;
return SASS_MEMORY_NEW(Color,
pstate,
Sass::round(w1*color1->r() + w2*color2->r(), ctx.c_options.precision),
Sass::round(w1*color1->g() + w2*color2->g(), ctx.c_options.precision),
Sass::round(w1*color1->b() + w2*color2->b(), ctx.c_options.precision),
color1->a()*p + color2->a()*(1-p));
}
////////////////
// HSL FUNCTIONS
////////////////
// RGB to HSL helper function
struct HSL { double h; double s; double l; };
HSL rgb_to_hsl(double r, double g, double b)
{
// Algorithm from http://en.wikipedia.org/wiki/wHSL_and_HSV#Conversion_from_RGB_to_HSL_or_HSV
r /= 255.0; g /= 255.0; b /= 255.0;
double max = std::max(r, std::max(g, b));
double min = std::min(r, std::min(g, b));
double delta = max - min;
double h = 0;
double s;
double l = (max + min) / 2.0;
if (max == min) {
h = s = 0; // achromatic
}
else {
if (l < 0.5) s = delta / (max + min);
else s = delta / (2.0 - max - min);
if (r == max) h = (g - b) / delta + (g < b ? 6 : 0);
else if (g == max) h = (b - r) / delta + 2;
else if (b == max) h = (r - g) / delta + 4;
}
HSL hsl_struct;
hsl_struct.h = h / 6 * 360;
hsl_struct.s = s * 100;
hsl_struct.l = l * 100;
return hsl_struct;
}
// hue to RGB helper function
double h_to_rgb(double m1, double m2, double h) {
while (h < 0) h += 1;
while (h > 1) h -= 1;
if (h*6.0 < 1) return m1 + (m2 - m1)*h*6;
if (h*2.0 < 1) return m2;
if (h*3.0 < 2) return m1 + (m2 - m1) * (2.0/3.0 - h)*6;
return m1;
}
Color_Ptr hsla_impl(double h, double s, double l, double a, Context& ctx, ParserState pstate)
{
h /= 360.0;
s /= 100.0;
l /= 100.0;
if (l < 0) l = 0;
if (s < 0) s = 0;
if (l > 1) l = 1;
if (s > 1) s = 1;
while (h < 0) h += 1;
while (h > 1) h -= 1;
// if saturation is exacly zero, we loose
// information for hue, since it will evaluate
// to zero if converted back from rgb. Setting
// saturation to a very tiny number solves this.
if (s == 0) s = 1e-10;
// Algorithm from the CSS3 spec: http://www.w3.org/TR/css3-color/#hsl-color.
double m2;
if (l <= 0.5) m2 = l*(s+1.0);
else m2 = (l+s)-(l*s);
double m1 = (l*2.0)-m2;
// round the results -- consider moving this into the Color constructor
double r = (h_to_rgb(m1, m2, h + 1.0/3.0) * 255.0);
double g = (h_to_rgb(m1, m2, h) * 255.0);
double b = (h_to_rgb(m1, m2, h - 1.0/3.0) * 255.0);
return SASS_MEMORY_NEW(Color, pstate, r, g, b, a);
}
Signature hsl_sig = "hsl($hue, $saturation, $lightness)";
BUILT_IN(hsl)
{
return hsla_impl(ARG("$hue", Number)->value(),
ARG("$saturation", Number)->value(),
ARG("$lightness", Number)->value(),
1.0,
ctx,
pstate);
}
Signature hsla_sig = "hsla($hue, $saturation, $lightness, $alpha)";
BUILT_IN(hsla)
{
return hsla_impl(ARG("$hue", Number)->value(),
ARG("$saturation", Number)->value(),
ARG("$lightness", Number)->value(),
ARG("$alpha", Number)->value(),
ctx,
pstate);
}
Signature hue_sig = "hue($color)";
BUILT_IN(hue)
{
Color_Ptr rgb_color = ARG("$color", Color);
HSL hsl_color = rgb_to_hsl(rgb_color->r(),
rgb_color->g(),
rgb_color->b());
return SASS_MEMORY_NEW(Number, pstate, hsl_color.h, "deg");
}
Signature saturation_sig = "saturation($color)";
BUILT_IN(saturation)
{
Color_Ptr rgb_color = ARG("$color", Color);
HSL hsl_color = rgb_to_hsl(rgb_color->r(),
rgb_color->g(),
rgb_color->b());
return SASS_MEMORY_NEW(Number, pstate, hsl_color.s, "%");
}
Signature lightness_sig = "lightness($color)";
BUILT_IN(lightness)
{
Color_Ptr rgb_color = ARG("$color", Color);
HSL hsl_color = rgb_to_hsl(rgb_color->r(),
rgb_color->g(),
rgb_color->b());
return SASS_MEMORY_NEW(Number, pstate, hsl_color.l, "%");
}
Signature adjust_hue_sig = "adjust-hue($color, $degrees)";
BUILT_IN(adjust_hue)
{
Color_Ptr rgb_color = ARG("$color", Color);
Number_Ptr degrees = ARG("$degrees", Number);
HSL hsl_color = rgb_to_hsl(rgb_color->r(),
rgb_color->g(),
rgb_color->b());
return hsla_impl(hsl_color.h + degrees->value(),
hsl_color.s,
hsl_color.l,
rgb_color->a(),
ctx,
pstate);
}
Signature lighten_sig = "lighten($color, $amount)";
BUILT_IN(lighten)
{
Color_Ptr rgb_color = ARG("$color", Color);
Number_Ptr amount = ARGR("$amount", Number, 0, 100);
HSL hsl_color = rgb_to_hsl(rgb_color->r(),
rgb_color->g(),
rgb_color->b());
//Check lightness is not negative before lighten it
double hslcolorL = hsl_color.l;
if (hslcolorL < 0) {
hslcolorL = 0;
}
return hsla_impl(hsl_color.h,
hsl_color.s,
hslcolorL + amount->value(),
rgb_color->a(),
ctx,
pstate);
}
Signature darken_sig = "darken($color, $amount)";
BUILT_IN(darken)
{
Color_Ptr rgb_color = ARG("$color", Color);
Number_Ptr amount = ARGR("$amount", Number, 0, 100);
HSL hsl_color = rgb_to_hsl(rgb_color->r(),
rgb_color->g(),
rgb_color->b());
//Check lightness if not over 100, before darken it
double hslcolorL = hsl_color.l;
if (hslcolorL > 100) {
hslcolorL = 100;
}
return hsla_impl(hsl_color.h,
hsl_color.s,
hslcolorL - amount->value(),
rgb_color->a(),
ctx,
pstate);
}
Signature saturate_sig = "saturate($color, $amount: false)";
BUILT_IN(saturate)
{
// CSS3 filter function overload: pass literal through directly
Number_Ptr amount = Cast<Number>(env["$amount"]);
if (!amount) {
return SASS_MEMORY_NEW(String_Quoted, pstate, "saturate(" + env["$color"]->to_string(ctx.c_options) + ")");
}
ARGR("$amount", Number, 0, 100);
Color_Ptr rgb_color = ARG("$color", Color);
HSL hsl_color = rgb_to_hsl(rgb_color->r(),
rgb_color->g(),
rgb_color->b());
double hslcolorS = hsl_color.s + amount->value();
// Saturation cannot be below 0 or above 100
if (hslcolorS < 0) {
hslcolorS = 0;
}
if (hslcolorS > 100) {
hslcolorS = 100;
}
return hsla_impl(hsl_color.h,
hslcolorS,
hsl_color.l,
rgb_color->a(),
ctx,
pstate);
}
Signature desaturate_sig = "desaturate($color, $amount)";
BUILT_IN(desaturate)
{
Color_Ptr rgb_color = ARG("$color", Color);
Number_Ptr amount = ARGR("$amount", Number, 0, 100);
HSL hsl_color = rgb_to_hsl(rgb_color->r(),
rgb_color->g(),
rgb_color->b());
double hslcolorS = hsl_color.s - amount->value();
// Saturation cannot be below 0 or above 100
if (hslcolorS <= 0) {
hslcolorS = 0;
}
if (hslcolorS > 100) {
hslcolorS = 100;
}
return hsla_impl(hsl_color.h,
hslcolorS,
hsl_color.l,
rgb_color->a(),
ctx,
pstate);
}
Signature grayscale_sig = "grayscale($color)";
BUILT_IN(grayscale)
{
// CSS3 filter function overload: pass literal through directly
Number_Ptr amount = Cast<Number>(env["$color"]);
if (amount) {
return SASS_MEMORY_NEW(String_Quoted, pstate, "grayscale(" + amount->to_string(ctx.c_options) + ")");
}
Color_Ptr rgb_color = ARG("$color", Color);
HSL hsl_color = rgb_to_hsl(rgb_color->r(),
rgb_color->g(),
rgb_color->b());
return hsla_impl(hsl_color.h,
0.0,
hsl_color.l,
rgb_color->a(),
ctx,
pstate);
}
Signature complement_sig = "complement($color)";
BUILT_IN(complement)
{
Color_Ptr rgb_color = ARG("$color", Color);
HSL hsl_color = rgb_to_hsl(rgb_color->r(),
rgb_color->g(),
rgb_color->b());
return hsla_impl(hsl_color.h - 180.0,
hsl_color.s,
hsl_color.l,
rgb_color->a(),
ctx,
pstate);
}
Signature invert_sig = "invert($color)";
BUILT_IN(invert)
{
// CSS3 filter function overload: pass literal through directly
Number_Ptr amount = Cast<Number>(env["$color"]);
if (amount) {
return SASS_MEMORY_NEW(String_Quoted, pstate, "invert(" + amount->to_string(ctx.c_options) + ")");
}
Color_Ptr rgb_color = ARG("$color", Color);
return SASS_MEMORY_NEW(Color,
pstate,
255 - rgb_color->r(),
255 - rgb_color->g(),
255 - rgb_color->b(),
rgb_color->a());
}
////////////////////
// OPACITY FUNCTIONS
////////////////////
Signature alpha_sig = "alpha($color)";
Signature opacity_sig = "opacity($color)";
BUILT_IN(alpha)
{
String_Constant_Ptr ie_kwd = Cast<String_Constant>(env["$color"]);
if (ie_kwd) {
return SASS_MEMORY_NEW(String_Quoted, pstate, "alpha(" + ie_kwd->value() + ")");
}
// CSS3 filter function overload: pass literal through directly
Number_Ptr amount = Cast<Number>(env["$color"]);
if (amount) {
return SASS_MEMORY_NEW(String_Quoted, pstate, "opacity(" + amount->to_string(ctx.c_options) + ")");
}
return SASS_MEMORY_NEW(Number, pstate, ARG("$color", Color)->a());
}
Signature opacify_sig = "opacify($color, $amount)";
Signature fade_in_sig = "fade-in($color, $amount)";
BUILT_IN(opacify)
{
Color_Ptr color = ARG("$color", Color);
double amount = ARGR("$amount", Number, 0, 1)->value();
double alpha = std::min(color->a() + amount, 1.0);
return SASS_MEMORY_NEW(Color,
pstate,
color->r(),
color->g(),
color->b(),
alpha);
}
Signature transparentize_sig = "transparentize($color, $amount)";
Signature fade_out_sig = "fade-out($color, $amount)";
BUILT_IN(transparentize)
{
Color_Ptr color = ARG("$color", Color);
double amount = ARGR("$amount", Number, 0, 1)->value();
double alpha = std::max(color->a() - amount, 0.0);
return SASS_MEMORY_NEW(Color,
pstate,
color->r(),
color->g(),
color->b(),
alpha);
}
////////////////////////
// OTHER COLOR FUNCTIONS
////////////////////////
Signature adjust_color_sig = "adjust-color($color, $red: false, $green: false, $blue: false, $hue: false, $saturation: false, $lightness: false, $alpha: false)";
BUILT_IN(adjust_color)
{
Color_Ptr color = ARG("$color", Color);
Number_Ptr r = Cast<Number>(env["$red"]);
Number_Ptr g = Cast<Number>(env["$green"]);
Number_Ptr b = Cast<Number>(env["$blue"]);
Number_Ptr h = Cast<Number>(env["$hue"]);
Number_Ptr s = Cast<Number>(env["$saturation"]);
Number_Ptr l = Cast<Number>(env["$lightness"]);
Number_Ptr a = Cast<Number>(env["$alpha"]);
bool rgb = r || g || b;
bool hsl = h || s || l;
if (rgb && hsl) {
error("Cannot specify HSL and RGB values for a color at the same time for `adjust-color'", pstate);
}
if (rgb) {
double rr = r ? ARGR("$red", Number, -255, 255)->value() : 0;
double gg = g ? ARGR("$green", Number, -255, 255)->value() : 0;
double bb = b ? ARGR("$blue", Number, -255, 255)->value() : 0;
double aa = a ? ARGR("$alpha", Number, -1, 1)->value() : 0;
return SASS_MEMORY_NEW(Color,
pstate,
color->r() + rr,
color->g() + gg,
color->b() + bb,
color->a() + aa);
}
if (hsl) {
HSL hsl_struct = rgb_to_hsl(color->r(), color->g(), color->b());
double ss = s ? ARGR("$saturation", Number, -100, 100)->value() : 0;
double ll = l ? ARGR("$lightness", Number, -100, 100)->value() : 0;
double aa = a ? ARGR("$alpha", Number, -1, 1)->value() : 0;
return hsla_impl(hsl_struct.h + (h ? h->value() : 0),
hsl_struct.s + ss,
hsl_struct.l + ll,
color->a() + aa,
ctx,
pstate);
}
if (a) {
return SASS_MEMORY_NEW(Color,
pstate,
color->r(),
color->g(),
color->b(),
color->a() + (a ? a->value() : 0));
}
error("not enough arguments for `adjust-color'", pstate);
// unreachable
return color;
}
Signature scale_color_sig = "scale-color($color, $red: false, $green: false, $blue: false, $hue: false, $saturation: false, $lightness: false, $alpha: false)";
BUILT_IN(scale_color)
{
Color_Ptr color = ARG("$color", Color);
Number_Ptr r = Cast<Number>(env["$red"]);
Number_Ptr g = Cast<Number>(env["$green"]);
Number_Ptr b = Cast<Number>(env["$blue"]);
Number_Ptr h = Cast<Number>(env["$hue"]);
Number_Ptr s = Cast<Number>(env["$saturation"]);
Number_Ptr l = Cast<Number>(env["$lightness"]);
Number_Ptr a = Cast<Number>(env["$alpha"]);
bool rgb = r || g || b;
bool hsl = h || s || l;
if (rgb && hsl) {
error("Cannot specify HSL and RGB values for a color at the same time for `scale-color'", pstate);
}
if (rgb) {
double rscale = (r ? ARGR("$red", Number, -100.0, 100.0)->value() : 0.0) / 100.0;
double gscale = (g ? ARGR("$green", Number, -100.0, 100.0)->value() : 0.0) / 100.0;
double bscale = (b ? ARGR("$blue", Number, -100.0, 100.0)->value() : 0.0) / 100.0;
double ascale = (a ? ARGR("$alpha", Number, -100.0, 100.0)->value() : 0.0) / 100.0;
return SASS_MEMORY_NEW(Color,
pstate,
color->r() + rscale * (rscale > 0.0 ? 255 - color->r() : color->r()),
color->g() + gscale * (gscale > 0.0 ? 255 - color->g() : color->g()),
color->b() + bscale * (bscale > 0.0 ? 255 - color->b() : color->b()),
color->a() + ascale * (ascale > 0.0 ? 1.0 - color->a() : color->a()));
}
if (hsl) {
double hscale = (h ? ARGR("$hue", Number, -100.0, 100.0)->value() : 0.0) / 100.0;
double sscale = (s ? ARGR("$saturation", Number, -100.0, 100.0)->value() : 0.0) / 100.0;
double lscale = (l ? ARGR("$lightness", Number, -100.0, 100.0)->value() : 0.0) / 100.0;
double ascale = (a ? ARGR("$alpha", Number, -100.0, 100.0)->value() : 0.0) / 100.0;
HSL hsl_struct = rgb_to_hsl(color->r(), color->g(), color->b());
hsl_struct.h += hscale * (hscale > 0.0 ? 360.0 - hsl_struct.h : hsl_struct.h);
hsl_struct.s += sscale * (sscale > 0.0 ? 100.0 - hsl_struct.s : hsl_struct.s);
hsl_struct.l += lscale * (lscale > 0.0 ? 100.0 - hsl_struct.l : hsl_struct.l);
double alpha = color->a() + ascale * (ascale > 0.0 ? 1.0 - color->a() : color->a());
return hsla_impl(hsl_struct.h, hsl_struct.s, hsl_struct.l, alpha, ctx, pstate);
}
if (a) {
double ascale = (ARGR("$alpha", Number, -100.0, 100.0)->value()) / 100.0;
return SASS_MEMORY_NEW(Color,
pstate,
color->r(),
color->g(),
color->b(),
color->a() + ascale * (ascale > 0.0 ? 1.0 - color->a() : color->a()));
}
error("not enough arguments for `scale-color'", pstate);
// unreachable
return color;
}
Signature change_color_sig = "change-color($color, $red: false, $green: false, $blue: false, $hue: false, $saturation: false, $lightness: false, $alpha: false)";
BUILT_IN(change_color)
{
Color_Ptr color = ARG("$color", Color);
Number_Ptr r = Cast<Number>(env["$red"]);
Number_Ptr g = Cast<Number>(env["$green"]);
Number_Ptr b = Cast<Number>(env["$blue"]);
Number_Ptr h = Cast<Number>(env["$hue"]);
Number_Ptr s = Cast<Number>(env["$saturation"]);
Number_Ptr l = Cast<Number>(env["$lightness"]);
Number_Ptr a = Cast<Number>(env["$alpha"]);
bool rgb = r || g || b;
bool hsl = h || s || l;
if (rgb && hsl) {
error("Cannot specify HSL and RGB values for a color at the same time for `change-color'", pstate);
}
if (rgb) {
return SASS_MEMORY_NEW(Color,
pstate,
r ? ARGR("$red", Number, 0, 255)->value() : color->r(),
g ? ARGR("$green", Number, 0, 255)->value() : color->g(),
b ? ARGR("$blue", Number, 0, 255)->value() : color->b(),
a ? ARGR("$alpha", Number, 0, 255)->value() : color->a());
}
if (hsl) {
HSL hsl_struct = rgb_to_hsl(color->r(), color->g(), color->b());
if (h) hsl_struct.h = std::fmod(h->value(), 360.0);
if (s) hsl_struct.s = ARGR("$saturation", Number, 0, 100)->value();
if (l) hsl_struct.l = ARGR("$lightness", Number, 0, 100)->value();
double alpha = a ? ARGR("$alpha", Number, 0, 1.0)->value() : color->a();
return hsla_impl(hsl_struct.h, hsl_struct.s, hsl_struct.l, alpha, ctx, pstate);
}
if (a) {
double alpha = ARGR("$alpha", Number, 0, 1.0)->value();
return SASS_MEMORY_NEW(Color,
pstate,
color->r(),
color->g(),
color->b(),
alpha);
}
error("not enough arguments for `change-color'", pstate);
// unreachable
return color;
}
template <size_t range>
static double cap_channel(double c) {
if (c > range) return range;
else if (c < 0) return 0;
else return c;
}
Signature ie_hex_str_sig = "ie-hex-str($color)";
BUILT_IN(ie_hex_str)
{
Color_Ptr c = ARG("$color", Color);
double r = cap_channel<0xff>(c->r());
double g = cap_channel<0xff>(c->g());
double b = cap_channel<0xff>(c->b());
double a = cap_channel<1> (c->a()) * 255;
std::stringstream ss;
ss << '#' << std::setw(2) << std::setfill('0');
ss << std::hex << std::setw(2) << static_cast<unsigned long>(Sass::round(a, ctx.c_options.precision));
ss << std::hex << std::setw(2) << static_cast<unsigned long>(Sass::round(r, ctx.c_options.precision));
ss << std::hex << std::setw(2) << static_cast<unsigned long>(Sass::round(g, ctx.c_options.precision));
ss << std::hex << std::setw(2) << static_cast<unsigned long>(Sass::round(b, ctx.c_options.precision));
std::string result(ss.str());
for (size_t i = 0, L = result.length(); i < L; ++i) {
result[i] = std::toupper(result[i]);
}
return SASS_MEMORY_NEW(String_Quoted, pstate, result);
}
///////////////////
// STRING FUNCTIONS
///////////////////
Signature unquote_sig = "unquote($string)";
BUILT_IN(sass_unquote)
{
AST_Node_Obj arg = env["$string"];
if (String_Quoted_Ptr string_quoted = Cast<String_Quoted>(arg)) {
String_Constant_Ptr result = SASS_MEMORY_NEW(String_Constant, pstate, string_quoted->value());
// remember if the string was quoted (color tokens)
result->is_delayed(true); // delay colors
return result;
}
else if (String_Constant_Ptr str = Cast<String_Constant>(arg)) {
return str;
}
else if (Expression_Ptr ex = Cast<Expression>(arg)) {
Sass_Output_Style oldstyle = ctx.c_options.output_style;
ctx.c_options.output_style = SASS_STYLE_NESTED;
std::string val(arg->to_string(ctx.c_options));
val = Cast<Null>(arg) ? "null" : val;
ctx.c_options.output_style = oldstyle;
deprecated_function("Passing " + val + ", a non-string value, to unquote()", pstate);
return ex;
}
throw std::runtime_error("Invalid Data Type for unquote");
}
Signature quote_sig = "quote($string)";
BUILT_IN(sass_quote)
{
AST_Node_Obj arg = env["$string"];
// only set quote mark to true if already a string
if (String_Quoted_Ptr qstr = Cast<String_Quoted>(arg)) {
qstr->quote_mark('*');
return qstr;
}
// all other nodes must be converted to a string node
std::string str(quote(arg->to_string(ctx.c_options), String_Constant::double_quote()));
String_Quoted_Ptr result = SASS_MEMORY_NEW(String_Quoted, pstate, str);
result->quote_mark('*');
return result;
}
Signature str_length_sig = "str-length($string)";
BUILT_IN(str_length)
{
size_t len = std::string::npos;
try {
String_Constant_Ptr s = ARG("$string", String_Constant);
len = UTF_8::code_point_count(s->value(), 0, s->value().size());
}
// handle any invalid utf8 errors
// other errors will be re-thrown
catch (...) { handle_utf8_error(pstate, backtrace); }
// return something even if we had an error (-1)
return SASS_MEMORY_NEW(Number, pstate, (double)len);
}
Signature str_insert_sig = "str-insert($string, $insert, $index)";
BUILT_IN(str_insert)
{
std::string str;
try {
String_Constant_Ptr s = ARG("$string", String_Constant);
str = s->value();
str = unquote(str);
String_Constant_Ptr i = ARG("$insert", String_Constant);
std::string ins = i->value();
ins = unquote(ins);
Number_Ptr ind = ARG("$index", Number);
double index = ind->value();
size_t len = UTF_8::code_point_count(str, 0, str.size());
if (index > 0 && index <= len) {
// positive and within string length
str.insert(UTF_8::offset_at_position(str, static_cast<size_t>(index) - 1), ins);
}
else if (index > len) {
// positive and past string length
str += ins;
}
else if (index == 0) {
str = ins + str;
}
else if (std::abs(index) <= len) {
// negative and within string length
index += len + 1;
str.insert(UTF_8::offset_at_position(str, static_cast<size_t>(index)), ins);
}
else {
// negative and past string length
str = ins + str;
}
if (String_Quoted_Ptr ss = Cast<String_Quoted>(s)) {
if (ss->quote_mark()) str = quote(str);
}
}
// handle any invalid utf8 errors
// other errors will be re-thrown
catch (...) { handle_utf8_error(pstate, backtrace); }
return SASS_MEMORY_NEW(String_Quoted, pstate, str);
}
Signature str_index_sig = "str-index($string, $substring)";
BUILT_IN(str_index)
{
size_t index = std::string::npos;
try {
String_Constant_Ptr s = ARG("$string", String_Constant);
String_Constant_Ptr t = ARG("$substring", String_Constant);
std::string str = s->value();
str = unquote(str);
std::string substr = t->value();
substr = unquote(substr);
size_t c_index = str.find(substr);
if(c_index == std::string::npos) {
return SASS_MEMORY_NEW(Null, pstate);
}
index = UTF_8::code_point_count(str, 0, c_index) + 1;
}
// handle any invalid utf8 errors
// other errors will be re-thrown
catch (...) { handle_utf8_error(pstate, backtrace); }
// return something even if we had an error (-1)
return SASS_MEMORY_NEW(Number, pstate, (double)index);
}
Signature str_slice_sig = "str-slice($string, $start-at, $end-at:-1)";
BUILT_IN(str_slice)
{
std::string newstr;
try {
String_Constant_Ptr s = ARG("$string", String_Constant);
double start_at = ARG("$start-at", Number)->value();
double end_at = ARG("$end-at", Number)->value();
String_Quoted_Ptr ss = Cast<String_Quoted>(s);
std::string str = unquote(s->value());
size_t size = utf8::distance(str.begin(), str.end());
if (!Cast<Number>(env["$end-at"])) {
end_at = -1;
}
if (end_at == 0 || (end_at + size) < 0) {
if (ss && ss->quote_mark()) newstr = quote("");
return SASS_MEMORY_NEW(String_Quoted, pstate, newstr);
}
if (end_at < 0) {
end_at += size + 1;
if (end_at == 0) end_at = 1;
}
if (end_at > size) { end_at = (double)size; }
if (start_at < 0) {
start_at += size + 1;
if (start_at < 0) start_at = 0;
}
else if (start_at == 0) { ++ start_at; }
if (start_at <= end_at)
{
std::string::iterator start = str.begin();
utf8::advance(start, start_at - 1, str.end());
std::string::iterator end = start;
utf8::advance(end, end_at - start_at + 1, str.end());
newstr = std::string(start, end);
}
if (ss) {
if(ss->quote_mark()) newstr = quote(newstr);
}
}
// handle any invalid utf8 errors
// other errors will be re-thrown
catch (...) { handle_utf8_error(pstate, backtrace); }
return SASS_MEMORY_NEW(String_Quoted, pstate, newstr);
}
Signature to_upper_case_sig = "to-upper-case($string)";
BUILT_IN(to_upper_case)
{
String_Constant_Ptr s = ARG("$string", String_Constant);
std::string str = s->value();
for (size_t i = 0, L = str.length(); i < L; ++i) {
if (Sass::Util::isAscii(str[i])) {
str[i] = std::toupper(str[i]);
}
}
if (String_Quoted_Ptr ss = Cast<String_Quoted>(s)) {
String_Quoted_Ptr cpy = SASS_MEMORY_COPY(ss);
cpy->value(str);
return cpy;
} else {
return SASS_MEMORY_NEW(String_Quoted, pstate, str);
}
}
Signature to_lower_case_sig = "to-lower-case($string)";
BUILT_IN(to_lower_case)
{
String_Constant_Ptr s = ARG("$string", String_Constant);
std::string str = s->value();
for (size_t i = 0, L = str.length(); i < L; ++i) {
if (Sass::Util::isAscii(str[i])) {
str[i] = std::tolower(str[i]);
}
}
if (String_Quoted_Ptr ss = Cast<String_Quoted>(s)) {
String_Quoted_Ptr cpy = SASS_MEMORY_COPY(ss);
cpy->value(str);
return cpy;
} else {
return SASS_MEMORY_NEW(String_Quoted, pstate, str);
}
}
///////////////////
// NUMBER FUNCTIONS
///////////////////
Signature percentage_sig = "percentage($number)";
BUILT_IN(percentage)
{
Number_Ptr n = ARG("$number", Number);
if (!n->is_unitless()) error("argument $number of `" + std::string(sig) + "` must be unitless", pstate);
return SASS_MEMORY_NEW(Number, pstate, n->value() * 100, "%");
}
Signature round_sig = "round($number)";
BUILT_IN(round)
{
Number_Ptr n = ARG("$number", Number);
Number_Ptr r = SASS_MEMORY_COPY(n);
r->pstate(pstate);
r->value(Sass::round(r->value(), ctx.c_options.precision));
return r;
}
Signature ceil_sig = "ceil($number)";
BUILT_IN(ceil)
{
Number_Ptr n = ARG("$number", Number);
Number_Ptr r = SASS_MEMORY_COPY(n);
r->pstate(pstate);
r->value(std::ceil(r->value()));
return r;
}
Signature floor_sig = "floor($number)";
BUILT_IN(floor)
{
Number_Ptr n = ARG("$number", Number);
Number_Ptr r = SASS_MEMORY_COPY(n);
r->pstate(pstate);
r->value(std::floor(r->value()));
return r;
}
Signature abs_sig = "abs($number)";
BUILT_IN(abs)
{
Number_Ptr n = ARG("$number", Number);
Number_Ptr r = SASS_MEMORY_COPY(n);
r->pstate(pstate);
r->value(std::abs(r->value()));
return r;
}
Signature min_sig = "min($numbers...)";
BUILT_IN(min)
{
List_Ptr arglist = ARG("$numbers", List);
Number_Obj least = NULL;
for (size_t i = 0, L = arglist->length(); i < L; ++i) {
Expression_Obj val = arglist->value_at_index(i);
Number_Obj xi = Cast<Number>(val);
if (!xi) {
error("\"" + val->to_string(ctx.c_options) + "\" is not a number for `min'", pstate);
}
if (least) {
if (*xi < *least) least = xi;
} else least = xi;
}
return least.detach();
}
Signature max_sig = "max($numbers...)";
BUILT_IN(max)
{
List_Ptr arglist = ARG("$numbers", List);
Number_Obj greatest = NULL;
for (size_t i = 0, L = arglist->length(); i < L; ++i) {
Expression_Obj val = arglist->value_at_index(i);
Number_Obj xi = Cast<Number>(val);
if (!xi) {
error("\"" + val->to_string(ctx.c_options) + "\" is not a number for `max'", pstate);
}
if (greatest) {
if (*greatest < *xi) greatest = xi;
} else greatest = xi;
}
return greatest.detach();
}
Signature random_sig = "random($limit:false)";
BUILT_IN(random)
{
AST_Node_Obj arg = env["$limit"];
Value_Ptr v = Cast<Value>(arg);
Number_Ptr l = Cast<Number>(arg);
Boolean_Ptr b = Cast<Boolean>(arg);
if (l) {
double lv = l->value();
if (lv < 1) {
stringstream err;
err << "$limit " << lv << " must be greater than or equal to 1 for `random'";
error(err.str(), pstate);
}
bool eq_int = std::fabs(trunc(lv) - lv) < NUMBER_EPSILON;
if (!eq_int) {
stringstream err;
err << "Expected $limit to be an integer but got " << lv << " for `random'";
error(err.str(), pstate);
}
std::uniform_real_distribution<> distributor(1, lv + 1);
uint_fast32_t distributed = static_cast<uint_fast32_t>(distributor(rand));
return SASS_MEMORY_NEW(Number, pstate, (double)distributed);
}
else if (b) {
std::uniform_real_distribution<> distributor(0, 1);
double distributed = static_cast<double>(distributor(rand));
return SASS_MEMORY_NEW(Number, pstate, distributed);
} else if (v) {
throw Exception::InvalidArgumentType(pstate, "random", "$limit", "number", v);
} else {
throw Exception::InvalidArgumentType(pstate, "random", "$limit", "number");
}
}
/////////////////
// LIST FUNCTIONS
/////////////////
Signature length_sig = "length($list)";
BUILT_IN(length)
{
if (Selector_List_Ptr sl = Cast<Selector_List>(env["$list"])) {
return SASS_MEMORY_NEW(Number, pstate, (double)sl->length());
}
Expression_Ptr v = ARG("$list", Expression);
if (v->concrete_type() == Expression::MAP) {
Map_Ptr map = Cast<Map>(env["$list"]);
return SASS_MEMORY_NEW(Number, pstate, (double)(map ? map->length() : 1));
}
if (v->concrete_type() == Expression::SELECTOR) {
if (Compound_Selector_Ptr h = Cast<Compound_Selector>(v)) {
return SASS_MEMORY_NEW(Number, pstate, (double)h->length());
} else if (Selector_List_Ptr ls = Cast<Selector_List>(v)) {
return SASS_MEMORY_NEW(Number, pstate, (double)ls->length());
} else {
return SASS_MEMORY_NEW(Number, pstate, 1);
}
}
List_Ptr list = Cast<List>(env["$list"]);
return SASS_MEMORY_NEW(Number,
pstate,
(double)(list ? list->size() : 1));
}
Signature nth_sig = "nth($list, $n)";
BUILT_IN(nth)
{
Number_Ptr n = ARG("$n", Number);
Map_Ptr m = Cast<Map>(env["$list"]);
if (Selector_List_Ptr sl = Cast<Selector_List>(env["$list"])) {
size_t len = m ? m->length() : sl->length();
bool empty = m ? m->empty() : sl->empty();
if (empty) error("argument `$list` of `" + std::string(sig) + "` must not be empty", pstate);
double index = std::floor(n->value() < 0 ? len + n->value() : n->value() - 1);
if (index < 0 || index > len - 1) error("index out of bounds for `" + std::string(sig) + "`", pstate);
// return (*sl)[static_cast<int>(index)];
Listize listize;
return (*sl)[static_cast<int>(index)]->perform(&listize);
}
List_Obj l = Cast<List>(env["$list"]);
if (n->value() == 0) error("argument `$n` of `" + std::string(sig) + "` must be non-zero", pstate);
// if the argument isn't a list, then wrap it in a singleton list
if (!m && !l) {
l = SASS_MEMORY_NEW(List, pstate, 1);
l->append(ARG("$list", Expression));
}
size_t len = m ? m->length() : l->length();
bool empty = m ? m->empty() : l->empty();
if (empty) error("argument `$list` of `" + std::string(sig) + "` must not be empty", pstate);
double index = std::floor(n->value() < 0 ? len + n->value() : n->value() - 1);
if (index < 0 || index > len - 1) error("index out of bounds for `" + std::string(sig) + "`", pstate);
if (m) {
l = SASS_MEMORY_NEW(List, pstate, 1);
l->append(m->keys()[static_cast<unsigned int>(index)]);
l->append(m->at(m->keys()[static_cast<unsigned int>(index)]));
return l.detach();
}
else {
Expression_Obj rv = l->value_at_index(static_cast<int>(index));
rv->set_delayed(false);
return rv.detach();
}
}
Signature set_nth_sig = "set-nth($list, $n, $value)";
BUILT_IN(set_nth)
{
Map_Obj m = Cast<Map>(env["$list"]);
List_Obj l = Cast<List>(env["$list"]);
Number_Obj n = ARG("$n", Number);
Expression_Obj v = ARG("$value", Expression);
if (!l) {
l = SASS_MEMORY_NEW(List, pstate, 1);
l->append(ARG("$list", Expression));
}
if (m) {
l = m->to_list(pstate);
}
if (l->empty()) error("argument `$list` of `" + std::string(sig) + "` must not be empty", pstate);
double index = std::floor(n->value() < 0 ? l->length() + n->value() : n->value() - 1);
if (index < 0 || index > l->length() - 1) error("index out of bounds for `" + std::string(sig) + "`", pstate);
List_Ptr result = SASS_MEMORY_NEW(List, pstate, l->length(), l->separator());
for (size_t i = 0, L = l->length(); i < L; ++i) {
result->append(((i == index) ? v : (*l)[i]));
}
return result;
}
Signature index_sig = "index($list, $value)";
BUILT_IN(index)
{
Map_Obj m = Cast<Map>(env["$list"]);
List_Obj l = Cast<List>(env["$list"]);
Expression_Obj v = ARG("$value", Expression);
if (!l) {
l = SASS_MEMORY_NEW(List, pstate, 1);
l->append(ARG("$list", Expression));
}
if (m) {
l = m->to_list(pstate);
}
for (size_t i = 0, L = l->length(); i < L; ++i) {
if (Eval::eq(l->value_at_index(i), v)) return SASS_MEMORY_NEW(Number, pstate, (double)(i+1));
}
return SASS_MEMORY_NEW(Null, pstate);
}
Signature join_sig = "join($list1, $list2, $separator: auto)";
BUILT_IN(join)
{
Map_Obj m1 = Cast<Map>(env["$list1"]);
Map_Obj m2 = Cast<Map>(env["$list2"]);
List_Obj l1 = Cast<List>(env["$list1"]);
List_Obj l2 = Cast<List>(env["$list2"]);
String_Constant_Obj sep = ARG("$separator", String_Constant);
enum Sass_Separator sep_val = (l1 ? l1->separator() : SASS_SPACE);
if (!l1) {
l1 = SASS_MEMORY_NEW(List, pstate, 1);
l1->append(ARG("$list1", Expression));
sep_val = (l2 ? l2->separator() : SASS_SPACE);
}
if (!l2) {
l2 = SASS_MEMORY_NEW(List, pstate, 1);
l2->append(ARG("$list2", Expression));
}
if (m1) {
l1 = m1->to_list(pstate);
sep_val = SASS_COMMA;
}
if (m2) {
l2 = m2->to_list(pstate);
}
size_t len = l1->length() + l2->length();
std::string sep_str = unquote(sep->value());
if (sep_str == "space") sep_val = SASS_SPACE;
else if (sep_str == "comma") sep_val = SASS_COMMA;
else if (sep_str != "auto") error("argument `$separator` of `" + std::string(sig) + "` must be `space`, `comma`, or `auto`", pstate);
List_Obj result = SASS_MEMORY_NEW(List, pstate, len, sep_val);
result->concat(l1);
result->concat(l2);
return result.detach();
}
Signature append_sig = "append($list, $val, $separator: auto)";
BUILT_IN(append)
{
Map_Obj m = Cast<Map>(env["$list"]);
List_Obj l = Cast<List>(env["$list"]);
Expression_Obj v = ARG("$val", Expression);
if (Selector_List_Ptr sl = Cast<Selector_List>(env["$list"])) {
Listize listize;
l = Cast<List>(sl->perform(&listize));
}
String_Constant_Obj sep = ARG("$separator", String_Constant);
if (!l) {
l = SASS_MEMORY_NEW(List, pstate, 1);
l->append(ARG("$list", Expression));
}
if (m) {
l = m->to_list(pstate);
}
List_Ptr result = SASS_MEMORY_COPY(l);
std::string sep_str(unquote(sep->value()));
if (sep_str != "auto") { // check default first
if (sep_str == "space") result->separator(SASS_SPACE);
else if (sep_str == "comma") result->separator(SASS_COMMA);
else error("argument `$separator` of `" + std::string(sig) + "` must be `space`, `comma`, or `auto`", pstate);
}
if (l->is_arglist()) {
result->append(SASS_MEMORY_NEW(Argument,
v->pstate(),
v,
"",
false,
false));
} else {
result->append(v);
}
return result;
}
Signature zip_sig = "zip($lists...)";
BUILT_IN(zip)
{
List_Obj arglist = SASS_MEMORY_COPY(ARG("$lists", List));
size_t shortest = 0;
for (size_t i = 0, L = arglist->length(); i < L; ++i) {
List_Obj ith = Cast<List>(arglist->value_at_index(i));
Map_Obj mith = Cast<Map>(arglist->value_at_index(i));
if (!ith) {
if (mith) {
ith = mith->to_list(pstate);
} else {
ith = SASS_MEMORY_NEW(List, pstate, 1);
ith->append(arglist->value_at_index(i));
}
if (arglist->is_arglist()) {
Argument_Obj arg = (Argument_Ptr)(arglist->at(i).ptr()); // XXX
arg->value(ith);
} else {
(*arglist)[i] = ith;
}
}
shortest = (i ? std::min(shortest, ith->length()) : ith->length());
}
List_Ptr zippers = SASS_MEMORY_NEW(List, pstate, shortest, SASS_COMMA);
size_t L = arglist->length();
for (size_t i = 0; i < shortest; ++i) {
List_Ptr zipper = SASS_MEMORY_NEW(List, pstate, L);
for (size_t j = 0; j < L; ++j) {
zipper->append(Cast<List>(arglist->value_at_index(j))->at(i));
}
zippers->append(zipper);
}
return zippers;
}
Signature list_separator_sig = "list_separator($list)";
BUILT_IN(list_separator)
{
List_Obj l = Cast<List>(env["$list"]);
if (!l) {
l = SASS_MEMORY_NEW(List, pstate, 1);
l->append(ARG("$list", Expression));
}
return SASS_MEMORY_NEW(String_Quoted,
pstate,
l->separator() == SASS_COMMA ? "comma" : "space");
}
/////////////////
// MAP FUNCTIONS
/////////////////
Signature map_get_sig = "map-get($map, $key)";
BUILT_IN(map_get)
{
// leaks for "map-get((), foo)" if not Obj
// investigate why this is (unexpected)
Map_Obj m = ARGM("$map", Map, ctx);
Expression_Obj v = ARG("$key", Expression);
try {
Expression_Obj val = m->at(v);
if (!val) return SASS_MEMORY_NEW(Null, pstate);
val->set_delayed(false);
return val.detach();
} catch (const std::out_of_range&) {
return SASS_MEMORY_NEW(Null, pstate);
}
catch (...) { throw; }
}
Signature map_has_key_sig = "map-has-key($map, $key)";
BUILT_IN(map_has_key)
{
Map_Obj m = ARGM("$map", Map, ctx);
Expression_Obj v = ARG("$key", Expression);
return SASS_MEMORY_NEW(Boolean, pstate, m->has(v));
}
Signature map_keys_sig = "map-keys($map)";
BUILT_IN(map_keys)
{
Map_Obj m = ARGM("$map", Map, ctx);
List_Ptr result = SASS_MEMORY_NEW(List, pstate, m->length(), SASS_COMMA);
for ( auto key : m->keys()) {
result->append(key);
}
return result;
}
Signature map_values_sig = "map-values($map)";
BUILT_IN(map_values)
{
Map_Obj m = ARGM("$map", Map, ctx);
List_Ptr result = SASS_MEMORY_NEW(List, pstate, m->length(), SASS_COMMA);
for ( auto key : m->keys()) {
result->append(m->at(key));
}
return result;
}
Signature map_merge_sig = "map-merge($map1, $map2)";
BUILT_IN(map_merge)
{
Map_Obj m1 = ARGM("$map1", Map, ctx);
Map_Obj m2 = ARGM("$map2", Map, ctx);
size_t len = m1->length() + m2->length();
Map_Ptr result = SASS_MEMORY_NEW(Map, pstate, len);
// concat not implemented for maps
*result += m1;
*result += m2;
return result;
}
Signature map_remove_sig = "map-remove($map, $keys...)";
BUILT_IN(map_remove)
{
bool remove;
Map_Obj m = ARGM("$map", Map, ctx);
List_Obj arglist = ARG("$keys", List);
Map_Ptr result = SASS_MEMORY_NEW(Map, pstate, 1);
for (auto key : m->keys()) {
remove = false;
for (size_t j = 0, K = arglist->length(); j < K && !remove; ++j) {
remove = Eval::eq(key, arglist->value_at_index(j));
}
if (!remove) *result << std::make_pair(key, m->at(key));
}
return result;
}
Signature keywords_sig = "keywords($args)";
BUILT_IN(keywords)
{
List_Obj arglist = SASS_MEMORY_COPY(ARG("$args", List)); // copy
Map_Obj result = SASS_MEMORY_NEW(Map, pstate, 1);
for (size_t i = arglist->size(), L = arglist->length(); i < L; ++i) {
Expression_Obj obj = arglist->at(i);
Argument_Obj arg = (Argument_Ptr) obj.ptr(); // XXX
std::string name = std::string(arg->name());
name = name.erase(0, 1); // sanitize name (remove dollar sign)
*result << std::make_pair(SASS_MEMORY_NEW(String_Quoted,
pstate, name),
arg->value());
}
return result.detach();
}
//////////////////////////
// INTROSPECTION FUNCTIONS
//////////////////////////
Signature type_of_sig = "type-of($value)";
BUILT_IN(type_of)
{
Expression_Ptr v = ARG("$value", Expression);
return SASS_MEMORY_NEW(String_Quoted, pstate, v->type());
}
Signature unit_sig = "unit($number)";
BUILT_IN(unit)
{ return SASS_MEMORY_NEW(String_Quoted, pstate, quote(ARG("$number", Number)->unit(), '"')); }
Signature unitless_sig = "unitless($number)";
BUILT_IN(unitless)
{ return SASS_MEMORY_NEW(Boolean, pstate, ARG("$number", Number)->is_unitless()); }
Signature comparable_sig = "comparable($number-1, $number-2)";
BUILT_IN(comparable)
{
Number_Ptr n1 = ARG("$number-1", Number);
Number_Ptr n2 = ARG("$number-2", Number);
if (n1->is_unitless() || n2->is_unitless()) {
return SASS_MEMORY_NEW(Boolean, pstate, true);
}
Number tmp_n2(n2); // copy
tmp_n2.normalize(n1->find_convertible_unit());
return SASS_MEMORY_NEW(Boolean, pstate, n1->unit() == tmp_n2.unit());
}
Signature variable_exists_sig = "variable-exists($name)";
BUILT_IN(variable_exists)
{
std::string s = Util::normalize_underscores(unquote(ARG("$name", String_Constant)->value()));
if(d_env.has("$"+s)) {
return SASS_MEMORY_NEW(Boolean, pstate, true);
}
else {
return SASS_MEMORY_NEW(Boolean, pstate, false);
}
}
Signature global_variable_exists_sig = "global-variable-exists($name)";
BUILT_IN(global_variable_exists)
{
std::string s = Util::normalize_underscores(unquote(ARG("$name", String_Constant)->value()));
if(d_env.has_global("$"+s)) {
return SASS_MEMORY_NEW(Boolean, pstate, true);
}
else {
return SASS_MEMORY_NEW(Boolean, pstate, false);
}
}
Signature function_exists_sig = "function-exists($name)";
BUILT_IN(function_exists)
{
std::string s = Util::normalize_underscores(unquote(ARG("$name", String_Constant)->value()));
if(d_env.has_global(s+"[f]")) {
return SASS_MEMORY_NEW(Boolean, pstate, true);
}
else {
return SASS_MEMORY_NEW(Boolean, pstate, false);
}
}
Signature mixin_exists_sig = "mixin-exists($name)";
BUILT_IN(mixin_exists)
{
std::string s = Util::normalize_underscores(unquote(ARG("$name", String_Constant)->value()));
if(d_env.has_global(s+"[m]")) {
return SASS_MEMORY_NEW(Boolean, pstate, true);
}
else {
return SASS_MEMORY_NEW(Boolean, pstate, false);
}
}
Signature feature_exists_sig = "feature-exists($name)";
BUILT_IN(feature_exists)
{
std::string s = unquote(ARG("$name", String_Constant)->value());
if(features.find(s) == features.end()) {
return SASS_MEMORY_NEW(Boolean, pstate, false);
}
else {
return SASS_MEMORY_NEW(Boolean, pstate, true);
}
}
Signature call_sig = "call($name, $args...)";
BUILT_IN(call)
{
std::string name = Util::normalize_underscores(unquote(ARG("$name", String_Constant)->value()));
List_Obj arglist = SASS_MEMORY_COPY(ARG("$args", List));
Arguments_Obj args = SASS_MEMORY_NEW(Arguments, pstate);
// std::string full_name(name + "[f]");
// Definition_Ptr def = d_env.has(full_name) ? Cast<Definition>((d_env)[full_name]) : 0;
// Parameters_Ptr params = def ? def->parameters() : 0;
// size_t param_size = params ? params->length() : 0;
for (size_t i = 0, L = arglist->length(); i < L; ++i) {
Expression_Obj expr = arglist->value_at_index(i);
// if (params && params->has_rest_parameter()) {
// Parameter_Obj p = param_size > i ? (*params)[i] : 0;
// List_Ptr list = Cast<List>(expr);
// if (list && p && !p->is_rest_parameter()) expr = (*list)[0];
// }
if (arglist->is_arglist()) {
Expression_Obj obj = arglist->at(i);
Argument_Obj arg = (Argument_Ptr) obj.ptr(); // XXX
args->append(SASS_MEMORY_NEW(Argument,
pstate,
expr,
arg ? arg->name() : "",
arg ? arg->is_rest_argument() : false,
arg ? arg->is_keyword_argument() : false));
} else {
args->append(SASS_MEMORY_NEW(Argument, pstate, expr));
}
}
Function_Call_Obj func = SASS_MEMORY_NEW(Function_Call, pstate, name, args);
Expand expand(ctx, &d_env, backtrace, &selector_stack);
func->via_call(true); // calc invoke is allowed
return func->perform(&expand.eval);
}
////////////////////
// BOOLEAN FUNCTIONS
////////////////////
Signature not_sig = "not($value)";
BUILT_IN(sass_not)
{
return SASS_MEMORY_NEW(Boolean, pstate, ARG("$value", Expression)->is_false());
}
Signature if_sig = "if($condition, $if-true, $if-false)";
// BUILT_IN(sass_if)
// { return ARG("$condition", Expression)->is_false() ? ARG("$if-false", Expression) : ARG("$if-true", Expression); }
BUILT_IN(sass_if)
{
Expand expand(ctx, &d_env, backtrace, &selector_stack);
Expression_Obj cond = ARG("$condition", Expression)->perform(&expand.eval);
bool is_true = !cond->is_false();
Expression_Ptr res = ARG(is_true ? "$if-true" : "$if-false", Expression);
res = res->perform(&expand.eval);
res->set_delayed(false); // clone?
return res;
}
//////////////////////////
// MISCELLANEOUS FUNCTIONS
//////////////////////////
// value.check_deprecated_interp if value.is_a?(Sass::Script::Value::String)
// unquoted_string(value.to_sass)
Signature inspect_sig = "inspect($value)";
BUILT_IN(inspect)
{
Expression_Ptr v = ARG("$value", Expression);
if (v->concrete_type() == Expression::NULL_VAL) {
return SASS_MEMORY_NEW(String_Quoted, pstate, "null");
} else if (v->concrete_type() == Expression::BOOLEAN && v->is_false()) {
return SASS_MEMORY_NEW(String_Quoted, pstate, "false");
} else if (v->concrete_type() == Expression::STRING) {
return v;
} else {
// ToDo: fix to_sass for nested parentheses
Sass_Output_Style old_style;
old_style = ctx.c_options.output_style;
ctx.c_options.output_style = TO_SASS;
Emitter emitter(ctx.c_options);
Inspect i(emitter);
i.in_declaration = false;
v->perform(&i);
ctx.c_options.output_style = old_style;
return SASS_MEMORY_NEW(String_Quoted, pstate, i.get_buffer());
}
// return v;
}
Signature selector_nest_sig = "selector-nest($selectors...)";
BUILT_IN(selector_nest)
{
List_Ptr arglist = ARG("$selectors", List);
// Not enough parameters
if( arglist->length() == 0 )
error("$selectors: At least one selector must be passed for `selector-nest'", pstate);
// Parse args into vector of selectors
std::vector<Selector_List_Obj> parsedSelectors;
for (size_t i = 0, L = arglist->length(); i < L; ++i) {
Expression_Obj exp = Cast<Expression>(arglist->value_at_index(i));
if (exp->concrete_type() == Expression::NULL_VAL) {
std::stringstream msg;
msg << "$selectors: null is not a valid selector: it must be a string,\n";
msg << "a list of strings, or a list of lists of strings for 'selector-nest'";
error(msg.str(), pstate);
}
if (String_Constant_Obj str = Cast<String_Constant>(exp)) {
str->quote_mark(0);
}
std::string exp_src = exp->to_string(ctx.c_options);
Selector_List_Obj sel = Parser::parse_selector(exp_src.c_str(), ctx);
parsedSelectors.push_back(sel);
}
// Nothing to do
if( parsedSelectors.empty() ) {
return SASS_MEMORY_NEW(Null, pstate);
}
// Set the first element as the `result`, keep appending to as we go down the parsedSelector vector.
std::vector<Selector_List_Obj>::iterator itr = parsedSelectors.begin();
Selector_List_Obj result = *itr;
++itr;
for(;itr != parsedSelectors.end(); ++itr) {
Selector_List_Obj child = *itr;
std::vector<Complex_Selector_Obj> exploded;
selector_stack.push_back(result);
Selector_List_Obj rv = child->resolve_parent_refs(selector_stack);
selector_stack.pop_back();
for (size_t m = 0, mLen = rv->length(); m < mLen; ++m) {
exploded.push_back((*rv)[m]);
}
result->elements(exploded);
}
Listize listize;
return result->perform(&listize);
}
Signature selector_append_sig = "selector-append($selectors...)";
BUILT_IN(selector_append)
{
List_Ptr arglist = ARG("$selectors", List);
// Not enough parameters
if( arglist->length() == 0 )
error("$selectors: At least one selector must be passed for `selector-append'", pstate);
// Parse args into vector of selectors
std::vector<Selector_List_Obj> parsedSelectors;
for (size_t i = 0, L = arglist->length(); i < L; ++i) {
Expression_Obj exp = Cast<Expression>(arglist->value_at_index(i));
if (exp->concrete_type() == Expression::NULL_VAL) {
std::stringstream msg;
msg << "$selectors: null is not a valid selector: it must be a string,\n";
msg << "a list of strings, or a list of lists of strings for 'selector-append'";
error(msg.str(), pstate);
}
if (String_Constant_Ptr str = Cast<String_Constant>(exp)) {
str->quote_mark(0);
}
std::string exp_src = exp->to_string();
Selector_List_Obj sel = Parser::parse_selector(exp_src.c_str(), ctx);
parsedSelectors.push_back(sel);
}
// Nothing to do
if( parsedSelectors.empty() ) {
return SASS_MEMORY_NEW(Null, pstate);
}
// Set the first element as the `result`, keep appending to as we go down the parsedSelector vector.
std::vector<Selector_List_Obj>::iterator itr = parsedSelectors.begin();
Selector_List_Obj result = *itr;
++itr;
for(;itr != parsedSelectors.end(); ++itr) {
Selector_List_Obj child = *itr;
std::vector<Complex_Selector_Obj> newElements;
// For every COMPLEX_SELECTOR in `result`
// For every COMPLEX_SELECTOR in `child`
// let parentSeqClone equal a copy of result->elements[i]
// let childSeq equal child->elements[j]
// Append all of childSeq head elements into parentSeqClone
// Set the innermost tail of parentSeqClone, to childSeq's tail
// Replace result->elements with newElements
for (size_t i = 0, resultLen = result->length(); i < resultLen; ++i) {
for (size_t j = 0, childLen = child->length(); j < childLen; ++j) {
Complex_Selector_Obj parentSeqClone = SASS_MEMORY_CLONE((*result)[i]);
Complex_Selector_Obj childSeq = (*child)[j];
Complex_Selector_Obj base = childSeq->tail();
// Must be a simple sequence
if( childSeq->combinator() != Complex_Selector::Combinator::ANCESTOR_OF ) {
std::string msg("Can't append \"");
msg += childSeq->to_string();
msg += "\" to \"";
msg += parentSeqClone->to_string();
msg += "\" for `selector-append'";
error(msg, pstate, backtrace);
}
// Cannot be a Universal selector
Element_Selector_Obj pType = Cast<Element_Selector>(childSeq->head()->first());
if(pType && pType->name() == "*") {
std::string msg("Can't append \"");
msg += childSeq->to_string();
msg += "\" to \"";
msg += parentSeqClone->to_string();
msg += "\" for `selector-append'";
error(msg, pstate, backtrace);
}
// TODO: Add check for namespace stuff
// append any selectors in childSeq's head
parentSeqClone->innermost()->head()->concat(base->head());
// Set parentSeqClone new tail
parentSeqClone->innermost()->tail( base->tail() );
newElements.push_back(parentSeqClone);
}
}
result->elements(newElements);
}
Listize listize;
return result->perform(&listize);
}
Signature selector_unify_sig = "selector-unify($selector1, $selector2)";
BUILT_IN(selector_unify)
{
Selector_List_Obj selector1 = ARGSEL("$selector1", Selector_List_Obj, p_contextualize);
Selector_List_Obj selector2 = ARGSEL("$selector2", Selector_List_Obj, p_contextualize);
Selector_List_Obj result = selector1->unify_with(selector2);
Listize listize;
return result->perform(&listize);
}
Signature simple_selectors_sig = "simple-selectors($selector)";
BUILT_IN(simple_selectors)
{
Compound_Selector_Obj sel = ARGSEL("$selector", Compound_Selector_Obj, p_contextualize);
List_Ptr l = SASS_MEMORY_NEW(List, sel->pstate(), sel->length(), SASS_COMMA);
for (size_t i = 0, L = sel->length(); i < L; ++i) {
Simple_Selector_Obj ss = (*sel)[i];
std::string ss_string = ss->to_string() ;
l->append(SASS_MEMORY_NEW(String_Quoted, ss->pstate(), ss_string));
}
return l;
}
Signature selector_extend_sig = "selector-extend($selector, $extendee, $extender)";
BUILT_IN(selector_extend)
{
Selector_List_Obj selector = ARGSEL("$selector", Selector_List_Obj, p_contextualize);
Selector_List_Obj extendee = ARGSEL("$extendee", Selector_List_Obj, p_contextualize);
Selector_List_Obj extender = ARGSEL("$extender", Selector_List_Obj, p_contextualize);
Subset_Map subset_map;
extender->populate_extends(extendee, subset_map);
Extend extend(subset_map);
Selector_List_Obj result = extend.extendSelectorList(selector, false);
Listize listize;
return result->perform(&listize);
}
Signature selector_replace_sig = "selector-replace($selector, $original, $replacement)";
BUILT_IN(selector_replace)
{
Selector_List_Obj selector = ARGSEL("$selector", Selector_List_Obj, p_contextualize);
Selector_List_Obj original = ARGSEL("$original", Selector_List_Obj, p_contextualize);
Selector_List_Obj replacement = ARGSEL("$replacement", Selector_List_Obj, p_contextualize);
Subset_Map subset_map;
replacement->populate_extends(original, subset_map);
Extend extend(subset_map);
Selector_List_Obj result = extend.extendSelectorList(selector, true);
Listize listize;
return result->perform(&listize);
}
Signature selector_parse_sig = "selector-parse($selector)";
BUILT_IN(selector_parse)
{
Selector_List_Obj sel = ARGSEL("$selector", Selector_List_Obj, p_contextualize);
Listize listize;
return sel->perform(&listize);
}
Signature is_superselector_sig = "is-superselector($super, $sub)";
BUILT_IN(is_superselector)
{
Selector_List_Obj sel_sup = ARGSEL("$super", Selector_List_Obj, p_contextualize);
Selector_List_Obj sel_sub = ARGSEL("$sub", Selector_List_Obj, p_contextualize);
bool result = sel_sup->is_superselector_of(sel_sub);
return SASS_MEMORY_NEW(Boolean, pstate, result);
}
Signature unique_id_sig = "unique-id()";
BUILT_IN(unique_id)
{
std::stringstream ss;
std::uniform_real_distribution<> distributor(0, 4294967296); // 16^8
uint_fast32_t distributed = static_cast<uint_fast32_t>(distributor(rand));
ss << "u" << std::setfill('0') << std::setw(8) << std::hex << distributed;
return SASS_MEMORY_NEW(String_Quoted, pstate, ss.str());
}
}
}