2 #include "functions.hpp"
5 #include "backtrace.hpp"
7 #include "constants.hpp"
13 #include "utf8_string.hpp"
14 #include "sass/base.h"
33 #define ARG(argname, argtype) get_arg<argtype>(argname, env, sig, pstate, backtrace)
34 #define ARGR(argname, argtype, lo, hi) get_arg_r(argname, env, sig, pstate, lo, hi, backtrace)
35 #define ARGM(argname, argtype, ctx) get_arg_m(argname, env, sig, pstate, backtrace, ctx)
38 using std::stringstream;
41 Definition_Ptr make_native_function(Signature sig, Native_Function func, Context& ctx)
43 Parser sig_parser = Parser::from_c_str(sig, ctx, ParserState("[built-in function]"));
44 sig_parser.lex<Prelexer::identifier>();
45 std::string name(Util::normalize_underscores(sig_parser.lexed));
46 Parameters_Obj params = sig_parser.parse_parameters();
47 return SASS_MEMORY_NEW(Definition,
48 ParserState("[built-in function]"),
56 Definition_Ptr make_c_function(Sass_Function_Entry c_func, Context& ctx)
58 using namespace Prelexer;
60 const char* sig = sass_function_get_signature(c_func);
61 Parser sig_parser = Parser::from_c_str(sig, ctx, ParserState("[c function]"));
62 // allow to overload generic callback plus @warn, @error and @debug with custom functions
63 sig_parser.lex < alternatives < identifier, exactly <'*'>,
64 exactly < Constants::warn_kwd >,
65 exactly < Constants::error_kwd >,
66 exactly < Constants::debug_kwd >
68 std::string name(Util::normalize_underscores(sig_parser.lexed));
69 Parameters_Obj params = sig_parser.parse_parameters();
70 return SASS_MEMORY_NEW(Definition,
71 ParserState("[c function]"),
79 std::string function_name(Signature sig)
82 return str.substr(0, str.find('('));
87 inline void handle_utf8_error (const ParserState& pstate, Backtrace* backtrace)
92 catch (utf8::invalid_code_point) {
93 std::string msg("utf8::invalid_code_point");
94 error(msg, pstate, backtrace);
96 catch (utf8::not_enough_room) {
97 std::string msg("utf8::not_enough_room");
98 error(msg, pstate, backtrace);
100 catch (utf8::invalid_utf8) {
101 std::string msg("utf8::invalid_utf8");
102 error(msg, pstate, backtrace);
104 catch (...) { throw; }
107 template <typename T>
108 T* get_arg(const std::string& argname, Env& env, Signature sig, ParserState pstate, Backtrace* backtrace)
110 // Minimal error handling -- the expectation is that built-ins will be written correctly!
111 T* val = Cast<T>(env[argname]);
113 std::string msg("argument `");
117 msg += "` must be a ";
118 msg += T::type_name();
119 error(msg, pstate, backtrace);
124 Map_Ptr get_arg_m(const std::string& argname, Env& env, Signature sig, ParserState pstate, Backtrace* backtrace, Context& ctx)
126 // Minimal error handling -- the expectation is that built-ins will be written correctly!
127 Map_Ptr val = Cast<Map>(env[argname]);
130 List_Ptr lval = Cast<List>(env[argname]);
131 if (lval && lval->length() == 0) return SASS_MEMORY_NEW(Map, pstate, 0);
133 // fallback on get_arg for error handling
134 val = get_arg<Map>(argname, env, sig, pstate, backtrace);
138 Number_Ptr get_arg_r(const std::string& argname, Env& env, Signature sig, ParserState pstate, double lo, double hi, Backtrace* backtrace)
140 // Minimal error handling -- the expectation is that built-ins will be written correctly!
141 Number_Ptr val = get_arg<Number>(argname, env, sig, pstate, backtrace);
142 double v = val->value();
143 if (!(lo <= v && v <= hi)) {
144 std::stringstream msg;
145 msg << "argument `" << argname << "` of `" << sig << "` must be between ";
146 msg << lo << " and " << hi;
147 error(msg.str(), pstate, backtrace);
152 #define ARGSEL(argname, seltype, contextualize) get_arg_sel<seltype>(argname, env, sig, pstate, backtrace, ctx)
154 template <typename T>
155 T get_arg_sel(const std::string& argname, Env& env, Signature sig, ParserState pstate, Backtrace* backtrace, Context& ctx);
158 Selector_List_Obj get_arg_sel(const std::string& argname, Env& env, Signature sig, ParserState pstate, Backtrace* backtrace, Context& ctx) {
159 Expression_Obj exp = ARG(argname, Expression);
160 if (exp->concrete_type() == Expression::NULL_VAL) {
161 std::stringstream msg;
162 msg << argname << ": null is not a valid selector: it must be a string,\n";
163 msg << "a list of strings, or a list of lists of strings for `" << function_name(sig) << "'";
164 error(msg.str(), pstate);
166 if (String_Constant_Ptr str = Cast<String_Constant>(exp)) {
169 std::string exp_src = exp->to_string(ctx.c_options);
170 return Parser::parse_selector(exp_src.c_str(), ctx);
174 Compound_Selector_Obj get_arg_sel(const std::string& argname, Env& env, Signature sig, ParserState pstate, Backtrace* backtrace, Context& ctx) {
175 Expression_Obj exp = ARG(argname, Expression);
176 if (exp->concrete_type() == Expression::NULL_VAL) {
177 std::stringstream msg;
178 msg << argname << ": null is not a string for `" << function_name(sig) << "'";
179 error(msg.str(), pstate);
181 if (String_Constant_Ptr str = Cast<String_Constant>(exp)) {
184 std::string exp_src = exp->to_string(ctx.c_options);
185 Selector_List_Obj sel_list = Parser::parse_selector(exp_src.c_str(), ctx);
186 if (sel_list->length() == 0) return NULL;
187 return sel_list->first()->tail()->head();
195 CryptAcquireContext(&hp, 0, 0, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT);
196 CryptGenRandom(hp, sizeof(rb), rb);
197 CryptReleaseContext(hp, 0);
200 memcpy(&seed, &rb[0], sizeof(seed));
207 std::random_device rd;
212 // note: the performance of many implementations of
213 // random_device degrades sharply once the entropy pool
214 // is exhausted. For practical use, random_device is
215 // generally only used to seed a PRNG such as mt19937.
216 static std::mt19937 rand(static_cast<unsigned int>(GetSeed()));
219 static std::set<std::string> features {
220 "global-variable-shadowing",
221 "extend-selector-pseudoclass",
230 inline double color_num(Number_Ptr n) {
231 if (n->unit() == "%") {
232 return std::min(std::max(n->value() * 255 / 100.0, 0.0), 255.0);
234 return std::min(std::max(n->value(), 0.0), 255.0);
238 inline double alpha_num(Number_Ptr n) {
239 if (n->unit() == "%") {
240 return std::min(std::max(n->value(), 0.0), 100.0);
242 return std::min(std::max(n->value(), 0.0), 1.0);
246 Signature rgb_sig = "rgb($red, $green, $blue)";
249 return SASS_MEMORY_NEW(Color,
251 color_num(ARG("$red", Number)),
252 color_num(ARG("$green", Number)),
253 color_num(ARG("$blue", Number)));
256 Signature rgba_4_sig = "rgba($red, $green, $blue, $alpha)";
259 return SASS_MEMORY_NEW(Color,
261 color_num(ARG("$red", Number)),
262 color_num(ARG("$green", Number)),
263 color_num(ARG("$blue", Number)),
264 alpha_num(ARG("$alpha", Number)));
267 Signature rgba_2_sig = "rgba($color, $alpha)";
270 Color_Ptr c_arg = ARG("$color", Color);
271 Color_Ptr new_c = SASS_MEMORY_COPY(c_arg);
272 new_c->a(alpha_num(ARG("$alpha", Number)));
277 Signature red_sig = "red($color)";
279 { return SASS_MEMORY_NEW(Number, pstate, ARG("$color", Color)->r()); }
281 Signature green_sig = "green($color)";
283 { return SASS_MEMORY_NEW(Number, pstate, ARG("$color", Color)->g()); }
285 Signature blue_sig = "blue($color)";
287 { return SASS_MEMORY_NEW(Number, pstate, ARG("$color", Color)->b()); }
289 Color* colormix(Context& ctx, ParserState& pstate, Color* color1, Color* color2, Number* weight) {
290 double p = weight->value()/100;
292 double a = color1->a() - color2->a();
294 double w1 = (((w * a == -1) ? w : (w + a)/(1 + w*a)) + 1)/2.0;
297 return SASS_MEMORY_NEW(Color,
299 Sass::round(w1*color1->r() + w2*color2->r(), ctx.c_options.precision),
300 Sass::round(w1*color1->g() + w2*color2->g(), ctx.c_options.precision),
301 Sass::round(w1*color1->b() + w2*color2->b(), ctx.c_options.precision),
302 color1->a()*p + color2->a()*(1-p));
305 Signature mix_sig = "mix($color-1, $color-2, $weight: 50%)";
308 Color_Obj color1 = ARG("$color-1", Color);
309 Color_Obj color2 = ARG("$color-2", Color);
310 Number_Obj weight = ARGR("$weight", Number, 0, 100);
311 return colormix(ctx, pstate, color1, color2, weight);
319 // RGB to HSL helper function
320 struct HSL { double h; double s; double l; };
321 HSL rgb_to_hsl(double r, double g, double b)
324 // Algorithm from http://en.wikipedia.org/wiki/wHSL_and_HSV#Conversion_from_RGB_to_HSL_or_HSV
325 r /= 255.0; g /= 255.0; b /= 255.0;
327 double max = std::max(r, std::max(g, b));
328 double min = std::min(r, std::min(g, b));
329 double delta = max - min;
331 double h = 0, s = 0, l = (max + min) / 2.0;
334 h = s = 0; // achromatic
337 if (l < 0.5) s = delta / (max + min);
338 else s = delta / (2.0 - max - min);
340 if (r == max) h = (g - b) / delta + (g < b ? 6 : 0);
341 else if (g == max) h = (b - r) / delta + 2;
342 else if (b == max) h = (r - g) / delta + 4;
346 hsl_struct.h = h / 6 * 360;
347 hsl_struct.s = s * 100;
348 hsl_struct.l = l * 100;
353 // hue to RGB helper function
354 double h_to_rgb(double m1, double m2, double h) {
355 while (h < 0) h += 1;
356 while (h > 1) h -= 1;
357 if (h*6.0 < 1) return m1 + (m2 - m1)*h*6;
358 if (h*2.0 < 1) return m2;
359 if (h*3.0 < 2) return m1 + (m2 - m1) * (2.0/3.0 - h)*6;
363 Color_Ptr hsla_impl(double h, double s, double l, double a, Context& ctx, ParserState pstate)
373 while (h < 0) h += 1;
374 while (h > 1) h -= 1;
376 // if saturation is exacly zero, we loose
377 // information for hue, since it will evaluate
378 // to zero if converted back from rgb. Setting
379 // saturation to a very tiny number solves this.
380 if (s == 0) s = 1e-10;
382 // Algorithm from the CSS3 spec: http://www.w3.org/TR/css3-color/#hsl-color.
384 if (l <= 0.5) m2 = l*(s+1.0);
385 else m2 = (l+s)-(l*s);
386 double m1 = (l*2.0)-m2;
387 // round the results -- consider moving this into the Color constructor
388 double r = (h_to_rgb(m1, m2, h + 1.0/3.0) * 255.0);
389 double g = (h_to_rgb(m1, m2, h) * 255.0);
390 double b = (h_to_rgb(m1, m2, h - 1.0/3.0) * 255.0);
392 return SASS_MEMORY_NEW(Color, pstate, r, g, b, a);
395 Signature hsl_sig = "hsl($hue, $saturation, $lightness)";
398 return hsla_impl(ARG("$hue", Number)->value(),
399 ARG("$saturation", Number)->value(),
400 ARG("$lightness", Number)->value(),
406 Signature hsla_sig = "hsla($hue, $saturation, $lightness, $alpha)";
409 return hsla_impl(ARG("$hue", Number)->value(),
410 ARG("$saturation", Number)->value(),
411 ARG("$lightness", Number)->value(),
412 ARG("$alpha", Number)->value(),
417 Signature hue_sig = "hue($color)";
420 Color_Ptr rgb_color = ARG("$color", Color);
421 HSL hsl_color = rgb_to_hsl(rgb_color->r(),
424 return SASS_MEMORY_NEW(Number, pstate, hsl_color.h, "deg");
427 Signature saturation_sig = "saturation($color)";
430 Color_Ptr rgb_color = ARG("$color", Color);
431 HSL hsl_color = rgb_to_hsl(rgb_color->r(),
434 return SASS_MEMORY_NEW(Number, pstate, hsl_color.s, "%");
437 Signature lightness_sig = "lightness($color)";
440 Color_Ptr rgb_color = ARG("$color", Color);
441 HSL hsl_color = rgb_to_hsl(rgb_color->r(),
444 return SASS_MEMORY_NEW(Number, pstate, hsl_color.l, "%");
447 Signature adjust_hue_sig = "adjust-hue($color, $degrees)";
450 Color_Ptr rgb_color = ARG("$color", Color);
451 Number_Ptr degrees = ARG("$degrees", Number);
452 HSL hsl_color = rgb_to_hsl(rgb_color->r(),
455 return hsla_impl(hsl_color.h + degrees->value(),
463 Signature lighten_sig = "lighten($color, $amount)";
466 Color_Ptr rgb_color = ARG("$color", Color);
467 Number_Ptr amount = ARGR("$amount", Number, 0, 100);
468 HSL hsl_color = rgb_to_hsl(rgb_color->r(),
471 //Check lightness is not negative before lighten it
472 double hslcolorL = hsl_color.l;
477 return hsla_impl(hsl_color.h,
479 hslcolorL + amount->value(),
485 Signature darken_sig = "darken($color, $amount)";
488 Color_Ptr rgb_color = ARG("$color", Color);
489 Number_Ptr amount = ARGR("$amount", Number, 0, 100);
490 HSL hsl_color = rgb_to_hsl(rgb_color->r(),
494 //Check lightness if not over 100, before darken it
495 double hslcolorL = hsl_color.l;
496 if (hslcolorL > 100) {
500 return hsla_impl(hsl_color.h,
502 hslcolorL - amount->value(),
508 Signature saturate_sig = "saturate($color, $amount: false)";
511 // CSS3 filter function overload: pass literal through directly
512 Number_Ptr amount = Cast<Number>(env["$amount"]);
514 return SASS_MEMORY_NEW(String_Quoted, pstate, "saturate(" + env["$color"]->to_string(ctx.c_options) + ")");
517 ARGR("$amount", Number, 0, 100);
518 Color_Ptr rgb_color = ARG("$color", Color);
519 HSL hsl_color = rgb_to_hsl(rgb_color->r(),
523 double hslcolorS = hsl_color.s + amount->value();
525 // Saturation cannot be below 0 or above 100
529 if (hslcolorS > 100) {
533 return hsla_impl(hsl_color.h,
541 Signature desaturate_sig = "desaturate($color, $amount)";
544 Color_Ptr rgb_color = ARG("$color", Color);
545 Number_Ptr amount = ARGR("$amount", Number, 0, 100);
546 HSL hsl_color = rgb_to_hsl(rgb_color->r(),
550 double hslcolorS = hsl_color.s - amount->value();
552 // Saturation cannot be below 0 or above 100
553 if (hslcolorS <= 0) {
556 if (hslcolorS > 100) {
560 return hsla_impl(hsl_color.h,
568 Signature grayscale_sig = "grayscale($color)";
571 // CSS3 filter function overload: pass literal through directly
572 Number_Ptr amount = Cast<Number>(env["$color"]);
574 return SASS_MEMORY_NEW(String_Quoted, pstate, "grayscale(" + amount->to_string(ctx.c_options) + ")");
577 Color_Ptr rgb_color = ARG("$color", Color);
578 HSL hsl_color = rgb_to_hsl(rgb_color->r(),
581 return hsla_impl(hsl_color.h,
589 Signature complement_sig = "complement($color)";
592 Color_Ptr rgb_color = ARG("$color", Color);
593 HSL hsl_color = rgb_to_hsl(rgb_color->r(),
596 return hsla_impl(hsl_color.h - 180.0,
604 Signature invert_sig = "invert($color, $weight: 100%)";
607 // CSS3 filter function overload: pass literal through directly
608 Number_Ptr amount = Cast<Number>(env["$color"]);
610 return SASS_MEMORY_NEW(String_Quoted, pstate, "invert(" + amount->to_string(ctx.c_options) + ")");
613 Number_Obj weight = ARGR("$weight", Number, 0, 100);
614 Color_Ptr rgb_color = ARG("$color", Color);
615 Color_Obj inv = SASS_MEMORY_NEW(Color,
617 255 - rgb_color->r(),
618 255 - rgb_color->g(),
619 255 - rgb_color->b(),
621 return colormix(ctx, pstate, inv, rgb_color, weight);
627 Signature alpha_sig = "alpha($color)";
628 Signature opacity_sig = "opacity($color)";
631 String_Constant_Ptr ie_kwd = Cast<String_Constant>(env["$color"]);
633 return SASS_MEMORY_NEW(String_Quoted, pstate, "alpha(" + ie_kwd->value() + ")");
636 // CSS3 filter function overload: pass literal through directly
637 Number_Ptr amount = Cast<Number>(env["$color"]);
639 return SASS_MEMORY_NEW(String_Quoted, pstate, "opacity(" + amount->to_string(ctx.c_options) + ")");
642 return SASS_MEMORY_NEW(Number, pstate, ARG("$color", Color)->a());
645 Signature opacify_sig = "opacify($color, $amount)";
646 Signature fade_in_sig = "fade-in($color, $amount)";
649 Color_Ptr color = ARG("$color", Color);
650 double amount = ARGR("$amount", Number, 0, 1)->value();
651 double alpha = std::min(color->a() + amount, 1.0);
652 return SASS_MEMORY_NEW(Color,
660 Signature transparentize_sig = "transparentize($color, $amount)";
661 Signature fade_out_sig = "fade-out($color, $amount)";
662 BUILT_IN(transparentize)
664 Color_Ptr color = ARG("$color", Color);
665 double amount = ARGR("$amount", Number, 0, 1)->value();
666 double alpha = std::max(color->a() - amount, 0.0);
667 return SASS_MEMORY_NEW(Color,
675 ////////////////////////
676 // OTHER COLOR FUNCTIONS
677 ////////////////////////
679 Signature adjust_color_sig = "adjust-color($color, $red: false, $green: false, $blue: false, $hue: false, $saturation: false, $lightness: false, $alpha: false)";
680 BUILT_IN(adjust_color)
682 Color_Ptr color = ARG("$color", Color);
683 Number_Ptr r = Cast<Number>(env["$red"]);
684 Number_Ptr g = Cast<Number>(env["$green"]);
685 Number_Ptr b = Cast<Number>(env["$blue"]);
686 Number_Ptr h = Cast<Number>(env["$hue"]);
687 Number_Ptr s = Cast<Number>(env["$saturation"]);
688 Number_Ptr l = Cast<Number>(env["$lightness"]);
689 Number_Ptr a = Cast<Number>(env["$alpha"]);
691 bool rgb = r || g || b;
692 bool hsl = h || s || l;
695 error("Cannot specify HSL and RGB values for a color at the same time for `adjust-color'", pstate);
698 double rr = r ? ARGR("$red", Number, -255, 255)->value() : 0;
699 double gg = g ? ARGR("$green", Number, -255, 255)->value() : 0;
700 double bb = b ? ARGR("$blue", Number, -255, 255)->value() : 0;
701 double aa = a ? ARGR("$alpha", Number, -1, 1)->value() : 0;
702 return SASS_MEMORY_NEW(Color,
710 HSL hsl_struct = rgb_to_hsl(color->r(), color->g(), color->b());
711 double ss = s ? ARGR("$saturation", Number, -100, 100)->value() : 0;
712 double ll = l ? ARGR("$lightness", Number, -100, 100)->value() : 0;
713 double aa = a ? ARGR("$alpha", Number, -1, 1)->value() : 0;
714 return hsla_impl(hsl_struct.h + (h ? h->value() : 0),
722 return SASS_MEMORY_NEW(Color,
727 color->a() + (a ? a->value() : 0));
729 error("not enough arguments for `adjust-color'", pstate);
734 Signature scale_color_sig = "scale-color($color, $red: false, $green: false, $blue: false, $hue: false, $saturation: false, $lightness: false, $alpha: false)";
735 BUILT_IN(scale_color)
737 Color_Ptr color = ARG("$color", Color);
738 Number_Ptr r = Cast<Number>(env["$red"]);
739 Number_Ptr g = Cast<Number>(env["$green"]);
740 Number_Ptr b = Cast<Number>(env["$blue"]);
741 Number_Ptr h = Cast<Number>(env["$hue"]);
742 Number_Ptr s = Cast<Number>(env["$saturation"]);
743 Number_Ptr l = Cast<Number>(env["$lightness"]);
744 Number_Ptr a = Cast<Number>(env["$alpha"]);
746 bool rgb = r || g || b;
747 bool hsl = h || s || l;
750 error("Cannot specify HSL and RGB values for a color at the same time for `scale-color'", pstate);
753 double rscale = (r ? ARGR("$red", Number, -100.0, 100.0)->value() : 0.0) / 100.0;
754 double gscale = (g ? ARGR("$green", Number, -100.0, 100.0)->value() : 0.0) / 100.0;
755 double bscale = (b ? ARGR("$blue", Number, -100.0, 100.0)->value() : 0.0) / 100.0;
756 double ascale = (a ? ARGR("$alpha", Number, -100.0, 100.0)->value() : 0.0) / 100.0;
757 return SASS_MEMORY_NEW(Color,
759 color->r() + rscale * (rscale > 0.0 ? 255 - color->r() : color->r()),
760 color->g() + gscale * (gscale > 0.0 ? 255 - color->g() : color->g()),
761 color->b() + bscale * (bscale > 0.0 ? 255 - color->b() : color->b()),
762 color->a() + ascale * (ascale > 0.0 ? 1.0 - color->a() : color->a()));
765 double hscale = (h ? ARGR("$hue", Number, -100.0, 100.0)->value() : 0.0) / 100.0;
766 double sscale = (s ? ARGR("$saturation", Number, -100.0, 100.0)->value() : 0.0) / 100.0;
767 double lscale = (l ? ARGR("$lightness", Number, -100.0, 100.0)->value() : 0.0) / 100.0;
768 double ascale = (a ? ARGR("$alpha", Number, -100.0, 100.0)->value() : 0.0) / 100.0;
769 HSL hsl_struct = rgb_to_hsl(color->r(), color->g(), color->b());
770 hsl_struct.h += hscale * (hscale > 0.0 ? 360.0 - hsl_struct.h : hsl_struct.h);
771 hsl_struct.s += sscale * (sscale > 0.0 ? 100.0 - hsl_struct.s : hsl_struct.s);
772 hsl_struct.l += lscale * (lscale > 0.0 ? 100.0 - hsl_struct.l : hsl_struct.l);
773 double alpha = color->a() + ascale * (ascale > 0.0 ? 1.0 - color->a() : color->a());
774 return hsla_impl(hsl_struct.h, hsl_struct.s, hsl_struct.l, alpha, ctx, pstate);
777 double ascale = (a ? ARGR("$alpha", Number, -100.0, 100.0)->value() : 0.0) / 100.0;
778 return SASS_MEMORY_NEW(Color,
783 color->a() + ascale * (ascale > 0.0 ? 1.0 - color->a() : color->a()));
785 error("not enough arguments for `scale-color'", pstate);
790 Signature change_color_sig = "change-color($color, $red: false, $green: false, $blue: false, $hue: false, $saturation: false, $lightness: false, $alpha: false)";
791 BUILT_IN(change_color)
793 Color_Ptr color = ARG("$color", Color);
794 Number_Ptr r = Cast<Number>(env["$red"]);
795 Number_Ptr g = Cast<Number>(env["$green"]);
796 Number_Ptr b = Cast<Number>(env["$blue"]);
797 Number_Ptr h = Cast<Number>(env["$hue"]);
798 Number_Ptr s = Cast<Number>(env["$saturation"]);
799 Number_Ptr l = Cast<Number>(env["$lightness"]);
800 Number_Ptr a = Cast<Number>(env["$alpha"]);
802 bool rgb = r || g || b;
803 bool hsl = h || s || l;
806 error("Cannot specify HSL and RGB values for a color at the same time for `change-color'", pstate);
809 return SASS_MEMORY_NEW(Color,
811 r ? ARGR("$red", Number, 0, 255)->value() : color->r(),
812 g ? ARGR("$green", Number, 0, 255)->value() : color->g(),
813 b ? ARGR("$blue", Number, 0, 255)->value() : color->b(),
814 a ? ARGR("$alpha", Number, 0, 255)->value() : color->a());
817 HSL hsl_struct = rgb_to_hsl(color->r(), color->g(), color->b());
818 if (h) hsl_struct.h = std::fmod(h->value(), 360.0);
819 if (s) hsl_struct.s = ARGR("$saturation", Number, 0, 100)->value();
820 if (l) hsl_struct.l = ARGR("$lightness", Number, 0, 100)->value();
821 double alpha = a ? ARGR("$alpha", Number, 0, 1.0)->value() : color->a();
822 return hsla_impl(hsl_struct.h, hsl_struct.s, hsl_struct.l, alpha, ctx, pstate);
825 double alpha = a ? ARGR("$alpha", Number, 0, 1.0)->value() : color->a();
826 return SASS_MEMORY_NEW(Color,
833 error("not enough arguments for `change-color'", pstate);
838 template <size_t range>
839 static double cap_channel(double c) {
840 if (c > range) return range;
841 else if (c < 0) return 0;
845 Signature ie_hex_str_sig = "ie-hex-str($color)";
848 Color_Ptr c = ARG("$color", Color);
849 double r = cap_channel<0xff>(c->r());
850 double g = cap_channel<0xff>(c->g());
851 double b = cap_channel<0xff>(c->b());
852 double a = cap_channel<1> (c->a()) * 255;
854 std::stringstream ss;
855 ss << '#' << std::setw(2) << std::setfill('0');
856 ss << std::hex << std::setw(2) << static_cast<unsigned long>(Sass::round(a, ctx.c_options.precision));
857 ss << std::hex << std::setw(2) << static_cast<unsigned long>(Sass::round(r, ctx.c_options.precision));
858 ss << std::hex << std::setw(2) << static_cast<unsigned long>(Sass::round(g, ctx.c_options.precision));
859 ss << std::hex << std::setw(2) << static_cast<unsigned long>(Sass::round(b, ctx.c_options.precision));
861 std::string result(ss.str());
862 for (size_t i = 0, L = result.length(); i < L; ++i) {
863 result[i] = std::toupper(result[i]);
865 return SASS_MEMORY_NEW(String_Quoted, pstate, result);
872 Signature unquote_sig = "unquote($string)";
873 BUILT_IN(sass_unquote)
875 AST_Node_Obj arg = env["$string"];
876 if (String_Quoted_Ptr string_quoted = Cast<String_Quoted>(arg)) {
877 String_Constant_Ptr result = SASS_MEMORY_NEW(String_Constant, pstate, string_quoted->value());
878 // remember if the string was quoted (color tokens)
879 result->is_delayed(true); // delay colors
882 else if (String_Constant_Ptr str = Cast<String_Constant>(arg)) {
885 else if (Expression_Ptr ex = Cast<Expression>(arg)) {
886 Sass_Output_Style oldstyle = ctx.c_options.output_style;
887 ctx.c_options.output_style = SASS_STYLE_NESTED;
888 std::string val(arg->to_string(ctx.c_options));
889 val = Cast<Null>(arg) ? "null" : val;
890 ctx.c_options.output_style = oldstyle;
892 deprecated_function("Passing " + val + ", a non-string value, to unquote()", pstate);
895 throw std::runtime_error("Invalid Data Type for unquote");
898 Signature quote_sig = "quote($string)";
901 AST_Node_Obj arg = env["$string"];
902 // only set quote mark to true if already a string
903 if (String_Quoted_Ptr qstr = Cast<String_Quoted>(arg)) {
904 qstr->quote_mark('*');
907 // all other nodes must be converted to a string node
908 std::string str(quote(arg->to_string(ctx.c_options), String_Constant::double_quote()));
909 String_Quoted_Ptr result = SASS_MEMORY_NEW(String_Quoted, pstate, str);
910 result->quote_mark('*');
915 Signature str_length_sig = "str-length($string)";
918 size_t len = std::string::npos;
920 String_Constant_Ptr s = ARG("$string", String_Constant);
921 len = UTF_8::code_point_count(s->value(), 0, s->value().size());
924 // handle any invalid utf8 errors
925 // other errors will be re-thrown
926 catch (...) { handle_utf8_error(pstate, backtrace); }
927 // return something even if we had an error (-1)
928 return SASS_MEMORY_NEW(Number, pstate, (double)len);
931 Signature str_insert_sig = "str-insert($string, $insert, $index)";
936 String_Constant_Ptr s = ARG("$string", String_Constant);
939 String_Constant_Ptr i = ARG("$insert", String_Constant);
940 std::string ins = i->value();
942 Number_Ptr ind = ARG("$index", Number);
943 double index = ind->value();
944 size_t len = UTF_8::code_point_count(str, 0, str.size());
946 if (index > 0 && index <= len) {
947 // positive and within string length
948 str.insert(UTF_8::offset_at_position(str, static_cast<size_t>(index) - 1), ins);
950 else if (index > len) {
951 // positive and past string length
954 else if (index == 0) {
957 else if (std::abs(index) <= len) {
958 // negative and within string length
960 str.insert(UTF_8::offset_at_position(str, static_cast<size_t>(index)), ins);
963 // negative and past string length
967 if (String_Quoted_Ptr ss = Cast<String_Quoted>(s)) {
968 if (ss->quote_mark()) str = quote(str);
971 // handle any invalid utf8 errors
972 // other errors will be re-thrown
973 catch (...) { handle_utf8_error(pstate, backtrace); }
974 return SASS_MEMORY_NEW(String_Quoted, pstate, str);
977 Signature str_index_sig = "str-index($string, $substring)";
980 size_t index = std::string::npos;
982 String_Constant_Ptr s = ARG("$string", String_Constant);
983 String_Constant_Ptr t = ARG("$substring", String_Constant);
984 std::string str = s->value();
986 std::string substr = t->value();
987 substr = unquote(substr);
989 size_t c_index = str.find(substr);
990 if(c_index == std::string::npos) {
991 return SASS_MEMORY_NEW(Null, pstate);
993 index = UTF_8::code_point_count(str, 0, c_index) + 1;
995 // handle any invalid utf8 errors
996 // other errors will be re-thrown
997 catch (...) { handle_utf8_error(pstate, backtrace); }
998 // return something even if we had an error (-1)
999 return SASS_MEMORY_NEW(Number, pstate, (double)index);
1002 Signature str_slice_sig = "str-slice($string, $start-at, $end-at:-1)";
1007 String_Constant_Ptr s = ARG("$string", String_Constant);
1008 double start_at = ARG("$start-at", Number)->value();
1009 double end_at = ARG("$end-at", Number)->value();
1010 String_Quoted_Ptr ss = Cast<String_Quoted>(s);
1012 std::string str = unquote(s->value());
1014 size_t size = utf8::distance(str.begin(), str.end());
1016 if (!Cast<Number>(env["$end-at"])) {
1020 if (end_at == 0 || (end_at + size) < 0) {
1021 if (ss && ss->quote_mark()) newstr = quote("");
1022 return SASS_MEMORY_NEW(String_Quoted, pstate, newstr);
1027 if (end_at == 0) end_at = 1;
1029 if (end_at > size) { end_at = (double)size; }
1031 start_at += size + 1;
1032 if (start_at < 0) start_at = 0;
1034 else if (start_at == 0) { ++ start_at; }
1036 if (start_at <= end_at)
1038 std::string::iterator start = str.begin();
1039 utf8::advance(start, start_at - 1, str.end());
1040 std::string::iterator end = start;
1041 utf8::advance(end, end_at - start_at + 1, str.end());
1042 newstr = std::string(start, end);
1045 if(ss->quote_mark()) newstr = quote(newstr);
1048 // handle any invalid utf8 errors
1049 // other errors will be re-thrown
1050 catch (...) { handle_utf8_error(pstate, backtrace); }
1051 return SASS_MEMORY_NEW(String_Quoted, pstate, newstr);
1054 Signature to_upper_case_sig = "to-upper-case($string)";
1055 BUILT_IN(to_upper_case)
1057 String_Constant_Ptr s = ARG("$string", String_Constant);
1058 std::string str = s->value();
1060 for (size_t i = 0, L = str.length(); i < L; ++i) {
1061 if (Sass::Util::isAscii(str[i])) {
1062 str[i] = std::toupper(str[i]);
1066 if (String_Quoted_Ptr ss = Cast<String_Quoted>(s)) {
1067 String_Quoted_Ptr cpy = SASS_MEMORY_COPY(ss);
1071 return SASS_MEMORY_NEW(String_Quoted, pstate, str);
1075 Signature to_lower_case_sig = "to-lower-case($string)";
1076 BUILT_IN(to_lower_case)
1078 String_Constant_Ptr s = ARG("$string", String_Constant);
1079 std::string str = s->value();
1081 for (size_t i = 0, L = str.length(); i < L; ++i) {
1082 if (Sass::Util::isAscii(str[i])) {
1083 str[i] = std::tolower(str[i]);
1087 if (String_Quoted_Ptr ss = Cast<String_Quoted>(s)) {
1088 String_Quoted_Ptr cpy = SASS_MEMORY_COPY(ss);
1092 return SASS_MEMORY_NEW(String_Quoted, pstate, str);
1100 Signature percentage_sig = "percentage($number)";
1101 BUILT_IN(percentage)
1103 Number_Ptr n = ARG("$number", Number);
1104 if (!n->is_unitless()) error("argument $number of `" + std::string(sig) + "` must be unitless", pstate);
1105 return SASS_MEMORY_NEW(Number, pstate, n->value() * 100, "%");
1108 Signature round_sig = "round($number)";
1111 Number_Ptr n = ARG("$number", Number);
1112 Number_Ptr r = SASS_MEMORY_COPY(n);
1114 r->value(Sass::round(r->value(), ctx.c_options.precision));
1118 Signature ceil_sig = "ceil($number)";
1121 Number_Ptr n = ARG("$number", Number);
1122 Number_Ptr r = SASS_MEMORY_COPY(n);
1124 r->value(std::ceil(r->value()));
1128 Signature floor_sig = "floor($number)";
1131 Number_Ptr n = ARG("$number", Number);
1132 Number_Ptr r = SASS_MEMORY_COPY(n);
1134 r->value(std::floor(r->value()));
1138 Signature abs_sig = "abs($number)";
1141 Number_Ptr n = ARG("$number", Number);
1142 Number_Ptr r = SASS_MEMORY_COPY(n);
1144 r->value(std::abs(r->value()));
1148 Signature min_sig = "min($numbers...)";
1151 List_Ptr arglist = ARG("$numbers", List);
1152 Number_Obj least = NULL;
1153 for (size_t i = 0, L = arglist->length(); i < L; ++i) {
1154 Expression_Obj val = arglist->value_at_index(i);
1155 Number_Obj xi = Cast<Number>(val);
1157 error("\"" + val->to_string(ctx.c_options) + "\" is not a number for `min'", pstate);
1160 if (*xi < *least) least = xi;
1163 return least.detach();
1166 Signature max_sig = "max($numbers...)";
1169 List_Ptr arglist = ARG("$numbers", List);
1170 Number_Obj greatest = NULL;
1171 for (size_t i = 0, L = arglist->length(); i < L; ++i) {
1172 Expression_Obj val = arglist->value_at_index(i);
1173 Number_Obj xi = Cast<Number>(val);
1175 error("\"" + val->to_string(ctx.c_options) + "\" is not a number for `max'", pstate);
1178 if (*greatest < *xi) greatest = xi;
1179 } else greatest = xi;
1181 return greatest.detach();
1184 Signature random_sig = "random($limit:false)";
1187 AST_Node_Obj arg = env["$limit"];
1188 Value_Ptr v = Cast<Value>(arg);
1189 Number_Ptr l = Cast<Number>(arg);
1190 Boolean_Ptr b = Cast<Boolean>(arg);
1192 double v = l->value();
1195 err << "$limit " << v << " must be greater than or equal to 1 for `random'";
1196 error(err.str(), pstate);
1198 bool eq_int = std::fabs(trunc(v) - v) < NUMBER_EPSILON;
1201 err << "Expected $limit to be an integer but got " << v << " for `random'";
1202 error(err.str(), pstate);
1204 std::uniform_real_distribution<> distributor(1, v + 1);
1205 uint_fast32_t distributed = static_cast<uint_fast32_t>(distributor(rand));
1206 return SASS_MEMORY_NEW(Number, pstate, (double)distributed);
1209 std::uniform_real_distribution<> distributor(0, 1);
1210 double distributed = static_cast<double>(distributor(rand));
1211 return SASS_MEMORY_NEW(Number, pstate, distributed);
1213 throw Exception::InvalidArgumentType(pstate, "random", "$limit", "number", v);
1215 throw Exception::InvalidArgumentType(pstate, "random", "$limit", "number");
1224 Signature length_sig = "length($list)";
1227 if (Selector_List_Ptr sl = Cast<Selector_List>(env["$list"])) {
1228 return SASS_MEMORY_NEW(Number, pstate, (double)sl->length());
1230 Expression_Ptr v = ARG("$list", Expression);
1231 if (v->concrete_type() == Expression::MAP) {
1232 Map_Ptr map = Cast<Map>(env["$list"]);
1233 return SASS_MEMORY_NEW(Number, pstate, (double)(map ? map->length() : 1));
1235 if (v->concrete_type() == Expression::SELECTOR) {
1236 if (Compound_Selector_Ptr h = Cast<Compound_Selector>(v)) {
1237 return SASS_MEMORY_NEW(Number, pstate, (double)h->length());
1238 } else if (Selector_List_Ptr ls = Cast<Selector_List>(v)) {
1239 return SASS_MEMORY_NEW(Number, pstate, (double)ls->length());
1241 return SASS_MEMORY_NEW(Number, pstate, 1);
1245 List_Ptr list = Cast<List>(env["$list"]);
1246 return SASS_MEMORY_NEW(Number,
1248 (double)(list ? list->size() : 1));
1251 Signature nth_sig = "nth($list, $n)";
1254 Number_Ptr n = ARG("$n", Number);
1255 Map_Ptr m = Cast<Map>(env["$list"]);
1256 if (Selector_List_Ptr sl = Cast<Selector_List>(env["$list"])) {
1257 size_t len = m ? m->length() : sl->length();
1258 bool empty = m ? m->empty() : sl->empty();
1259 if (empty) error("argument `$list` of `" + std::string(sig) + "` must not be empty", pstate);
1260 double index = std::floor(n->value() < 0 ? len + n->value() : n->value() - 1);
1261 if (index < 0 || index > len - 1) error("index out of bounds for `" + std::string(sig) + "`", pstate);
1262 // return (*sl)[static_cast<int>(index)];
1264 return (*sl)[static_cast<int>(index)]->perform(&listize);
1266 List_Obj l = Cast<List>(env["$list"]);
1267 if (n->value() == 0) error("argument `$n` of `" + std::string(sig) + "` must be non-zero", pstate);
1268 // if the argument isn't a list, then wrap it in a singleton list
1270 l = SASS_MEMORY_NEW(List, pstate, 1);
1271 l->append(ARG("$list", Expression));
1273 size_t len = m ? m->length() : l->length();
1274 bool empty = m ? m->empty() : l->empty();
1275 if (empty) error("argument `$list` of `" + std::string(sig) + "` must not be empty", pstate);
1276 double index = std::floor(n->value() < 0 ? len + n->value() : n->value() - 1);
1277 if (index < 0 || index > len - 1) error("index out of bounds for `" + std::string(sig) + "`", pstate);
1280 l = SASS_MEMORY_NEW(List, pstate, 1);
1281 l->append(m->keys()[static_cast<unsigned int>(index)]);
1282 l->append(m->at(m->keys()[static_cast<unsigned int>(index)]));
1286 Expression_Obj rv = l->value_at_index(static_cast<int>(index));
1287 rv->set_delayed(false);
1292 Signature set_nth_sig = "set-nth($list, $n, $value)";
1295 Map_Obj m = Cast<Map>(env["$list"]);
1296 List_Obj l = Cast<List>(env["$list"]);
1297 Number_Obj n = ARG("$n", Number);
1298 Expression_Obj v = ARG("$value", Expression);
1300 l = SASS_MEMORY_NEW(List, pstate, 1);
1301 l->append(ARG("$list", Expression));
1304 l = m->to_list(ctx, pstate);
1306 if (l->empty()) error("argument `$list` of `" + std::string(sig) + "` must not be empty", pstate);
1307 double index = std::floor(n->value() < 0 ? l->length() + n->value() : n->value() - 1);
1308 if (index < 0 || index > l->length() - 1) error("index out of bounds for `" + std::string(sig) + "`", pstate);
1309 List_Ptr result = SASS_MEMORY_NEW(List, pstate, l->length(), l->separator(), false, l->is_bracketed());
1310 for (size_t i = 0, L = l->length(); i < L; ++i) {
1311 result->append(((i == index) ? v : (*l)[i]));
1316 Signature index_sig = "index($list, $value)";
1319 Map_Obj m = Cast<Map>(env["$list"]);
1320 List_Obj l = Cast<List>(env["$list"]);
1321 Expression_Obj v = ARG("$value", Expression);
1323 l = SASS_MEMORY_NEW(List, pstate, 1);
1324 l->append(ARG("$list", Expression));
1327 l = m->to_list(ctx, pstate);
1329 for (size_t i = 0, L = l->length(); i < L; ++i) {
1330 if (Eval::eq(l->value_at_index(i), v)) return SASS_MEMORY_NEW(Number, pstate, (double)(i+1));
1332 return SASS_MEMORY_NEW(Null, pstate);
1335 Signature join_sig = "join($list1, $list2, $separator: auto, $bracketed: auto)";
1338 Map_Obj m1 = Cast<Map>(env["$list1"]);
1339 Map_Obj m2 = Cast<Map>(env["$list2"]);
1340 List_Obj l1 = Cast<List>(env["$list1"]);
1341 List_Obj l2 = Cast<List>(env["$list2"]);
1342 String_Constant_Obj sep = ARG("$separator", String_Constant);
1343 enum Sass_Separator sep_val = (l1 ? l1->separator() : SASS_SPACE);
1344 Value* bracketed = ARG("$bracketed", Value);
1345 bool is_bracketed = (l1 ? l1->is_bracketed() : false);
1347 l1 = SASS_MEMORY_NEW(List, pstate, 1);
1348 l1->append(ARG("$list1", Expression));
1349 sep_val = (l2 ? l2->separator() : SASS_SPACE);
1350 is_bracketed = (l2 ? l2->is_bracketed() : false);
1353 l2 = SASS_MEMORY_NEW(List, pstate, 1);
1354 l2->append(ARG("$list2", Expression));
1357 l1 = m1->to_list(ctx, pstate);
1358 sep_val = SASS_COMMA;
1361 l2 = m2->to_list(ctx, pstate);
1363 size_t len = l1->length() + l2->length();
1364 std::string sep_str = unquote(sep->value());
1365 if (sep_str == "space") sep_val = SASS_SPACE;
1366 else if (sep_str == "comma") sep_val = SASS_COMMA;
1367 else if (sep_str != "auto") error("argument `$separator` of `" + std::string(sig) + "` must be `space`, `comma`, or `auto`", pstate);
1368 String_Constant_Obj bracketed_as_str = Cast<String_Constant>(bracketed);
1369 bool bracketed_is_auto = bracketed_as_str && unquote(bracketed_as_str->value()) == "auto";
1370 if (!bracketed_is_auto) {
1371 is_bracketed = !bracketed->is_false();
1373 List_Obj result = SASS_MEMORY_NEW(List, pstate, len, sep_val, false, is_bracketed);
1376 return result.detach();
1379 Signature append_sig = "append($list, $val, $separator: auto)";
1382 Map_Obj m = Cast<Map>(env["$list"]);
1383 List_Obj l = Cast<List>(env["$list"]);
1384 Expression_Obj v = ARG("$val", Expression);
1385 if (Selector_List_Ptr sl = Cast<Selector_List>(env["$list"])) {
1387 l = Cast<List>(sl->perform(&listize));
1389 String_Constant_Obj sep = ARG("$separator", String_Constant);
1391 l = SASS_MEMORY_NEW(List, pstate, 1);
1392 l->append(ARG("$list", Expression));
1395 l = m->to_list(ctx, pstate);
1397 List_Ptr result = SASS_MEMORY_COPY(l);
1398 std::string sep_str(unquote(sep->value()));
1399 if (sep_str != "auto") { // check default first
1400 if (sep_str == "space") result->separator(SASS_SPACE);
1401 else if (sep_str == "comma") result->separator(SASS_COMMA);
1402 else error("argument `$separator` of `" + std::string(sig) + "` must be `space`, `comma`, or `auto`", pstate);
1404 if (l->is_arglist()) {
1405 result->append(SASS_MEMORY_NEW(Argument,
1418 Signature zip_sig = "zip($lists...)";
1421 List_Obj arglist = SASS_MEMORY_COPY(ARG("$lists", List));
1422 size_t shortest = 0;
1423 for (size_t i = 0, L = arglist->length(); i < L; ++i) {
1424 List_Obj ith = Cast<List>(arglist->value_at_index(i));
1425 Map_Obj mith = Cast<Map>(arglist->value_at_index(i));
1428 ith = mith->to_list(ctx, pstate);
1430 ith = SASS_MEMORY_NEW(List, pstate, 1);
1431 ith->append(arglist->value_at_index(i));
1433 if (arglist->is_arglist()) {
1434 Argument_Obj arg = (Argument_Ptr)(arglist->at(i).ptr()); // XXX
1437 (*arglist)[i] = ith;
1440 shortest = (i ? std::min(shortest, ith->length()) : ith->length());
1442 List_Ptr zippers = SASS_MEMORY_NEW(List, pstate, shortest, SASS_COMMA);
1443 size_t L = arglist->length();
1444 for (size_t i = 0; i < shortest; ++i) {
1445 List_Ptr zipper = SASS_MEMORY_NEW(List, pstate, L);
1446 for (size_t j = 0; j < L; ++j) {
1447 zipper->append(Cast<List>(arglist->value_at_index(j))->at(i));
1449 zippers->append(zipper);
1454 Signature list_separator_sig = "list_separator($list)";
1455 BUILT_IN(list_separator)
1457 List_Obj l = Cast<List>(env["$list"]);
1459 l = SASS_MEMORY_NEW(List, pstate, 1);
1460 l->append(ARG("$list", Expression));
1462 return SASS_MEMORY_NEW(String_Quoted,
1464 l->separator() == SASS_COMMA ? "comma" : "space");
1471 Signature map_get_sig = "map-get($map, $key)";
1474 // leaks for "map-get((), foo)" if not Obj
1475 // investigate why this is (unexpected)
1476 Map_Obj m = ARGM("$map", Map, ctx);
1477 Expression_Obj v = ARG("$key", Expression);
1479 Expression_Obj val = m->at(v);
1480 return val ? val.detach() : SASS_MEMORY_NEW(Null, pstate);
1481 } catch (const std::out_of_range&) {
1482 return SASS_MEMORY_NEW(Null, pstate);
1484 catch (...) { throw; }
1487 Signature map_has_key_sig = "map-has-key($map, $key)";
1488 BUILT_IN(map_has_key)
1490 Map_Obj m = ARGM("$map", Map, ctx);
1491 Expression_Obj v = ARG("$key", Expression);
1492 return SASS_MEMORY_NEW(Boolean, pstate, m->has(v));
1495 Signature map_keys_sig = "map-keys($map)";
1498 Map_Obj m = ARGM("$map", Map, ctx);
1499 List_Ptr result = SASS_MEMORY_NEW(List, pstate, m->length(), SASS_COMMA);
1500 for ( auto key : m->keys()) {
1501 result->append(key);
1506 Signature map_values_sig = "map-values($map)";
1507 BUILT_IN(map_values)
1509 Map_Obj m = ARGM("$map", Map, ctx);
1510 List_Ptr result = SASS_MEMORY_NEW(List, pstate, m->length(), SASS_COMMA);
1511 for ( auto key : m->keys()) {
1512 result->append(m->at(key));
1517 Signature map_merge_sig = "map-merge($map1, $map2)";
1520 Map_Obj m1 = ARGM("$map1", Map, ctx);
1521 Map_Obj m2 = ARGM("$map2", Map, ctx);
1523 size_t len = m1->length() + m2->length();
1524 Map_Ptr result = SASS_MEMORY_NEW(Map, pstate, len);
1525 // concat not implemented for maps
1531 Signature map_remove_sig = "map-remove($map, $keys...)";
1532 BUILT_IN(map_remove)
1535 Map_Obj m = ARGM("$map", Map, ctx);
1536 List_Obj arglist = ARG("$keys", List);
1537 Map_Ptr result = SASS_MEMORY_NEW(Map, pstate, 1);
1538 for (auto key : m->keys()) {
1540 for (size_t j = 0, K = arglist->length(); j < K && !remove; ++j) {
1541 remove = Eval::eq(key, arglist->value_at_index(j));
1543 if (!remove) *result << std::make_pair(key, m->at(key));
1548 Signature keywords_sig = "keywords($args)";
1551 List_Obj arglist = SASS_MEMORY_COPY(ARG("$args", List)); // copy
1552 Map_Obj result = SASS_MEMORY_NEW(Map, pstate, 1);
1553 for (size_t i = arglist->size(), L = arglist->length(); i < L; ++i) {
1554 Expression_Obj obj = arglist->at(i);
1555 Argument_Obj arg = (Argument_Ptr) obj.ptr(); // XXX
1556 std::string name = std::string(arg->name());
1557 name = name.erase(0, 1); // sanitize name (remove dollar sign)
1558 *result << std::make_pair(SASS_MEMORY_NEW(String_Quoted,
1562 return result.detach();
1565 //////////////////////////
1566 // INTROSPECTION FUNCTIONS
1567 //////////////////////////
1569 Signature type_of_sig = "type-of($value)";
1572 Expression_Ptr v = ARG("$value", Expression);
1573 return SASS_MEMORY_NEW(String_Quoted, pstate, v->type());
1576 Signature unit_sig = "unit($number)";
1578 { return SASS_MEMORY_NEW(String_Quoted, pstate, quote(ARG("$number", Number)->unit(), '"')); }
1580 Signature unitless_sig = "unitless($number)";
1582 { return SASS_MEMORY_NEW(Boolean, pstate, ARG("$number", Number)->is_unitless()); }
1584 Signature comparable_sig = "comparable($number-1, $number-2)";
1585 BUILT_IN(comparable)
1587 Number_Ptr n1 = ARG("$number-1", Number);
1588 Number_Ptr n2 = ARG("$number-2", Number);
1589 if (n1->is_unitless() || n2->is_unitless()) {
1590 return SASS_MEMORY_NEW(Boolean, pstate, true);
1592 Number tmp_n2(n2); // copy
1593 tmp_n2.normalize(n1->find_convertible_unit());
1594 return SASS_MEMORY_NEW(Boolean, pstate, n1->unit() == tmp_n2.unit());
1597 Signature variable_exists_sig = "variable-exists($name)";
1598 BUILT_IN(variable_exists)
1600 std::string s = Util::normalize_underscores(unquote(ARG("$name", String_Constant)->value()));
1602 if(d_env.has("$"+s)) {
1603 return SASS_MEMORY_NEW(Boolean, pstate, true);
1606 return SASS_MEMORY_NEW(Boolean, pstate, false);
1610 Signature global_variable_exists_sig = "global-variable-exists($name)";
1611 BUILT_IN(global_variable_exists)
1613 std::string s = Util::normalize_underscores(unquote(ARG("$name", String_Constant)->value()));
1615 if(d_env.has_global("$"+s)) {
1616 return SASS_MEMORY_NEW(Boolean, pstate, true);
1619 return SASS_MEMORY_NEW(Boolean, pstate, false);
1623 Signature function_exists_sig = "function-exists($name)";
1624 BUILT_IN(function_exists)
1626 std::string s = Util::normalize_underscores(unquote(ARG("$name", String_Constant)->value()));
1628 if(d_env.has_global(s+"[f]")) {
1629 return SASS_MEMORY_NEW(Boolean, pstate, true);
1632 return SASS_MEMORY_NEW(Boolean, pstate, false);
1636 Signature mixin_exists_sig = "mixin-exists($name)";
1637 BUILT_IN(mixin_exists)
1639 std::string s = Util::normalize_underscores(unquote(ARG("$name", String_Constant)->value()));
1641 if(d_env.has_global(s+"[m]")) {
1642 return SASS_MEMORY_NEW(Boolean, pstate, true);
1645 return SASS_MEMORY_NEW(Boolean, pstate, false);
1649 Signature feature_exists_sig = "feature-exists($name)";
1650 BUILT_IN(feature_exists)
1652 std::string s = unquote(ARG("$name", String_Constant)->value());
1654 if(features.find(s) == features.end()) {
1655 return SASS_MEMORY_NEW(Boolean, pstate, false);
1658 return SASS_MEMORY_NEW(Boolean, pstate, true);
1662 Signature call_sig = "call($name, $args...)";
1665 std::string name = Util::normalize_underscores(unquote(ARG("$name", String_Constant)->value()));
1666 List_Obj arglist = SASS_MEMORY_COPY(ARG("$args", List));
1668 Arguments_Obj args = SASS_MEMORY_NEW(Arguments, pstate);
1669 // std::string full_name(name + "[f]");
1670 // Definition_Ptr def = d_env.has(full_name) ? Cast<Definition>((d_env)[full_name]) : 0;
1671 // Parameters_Ptr params = def ? def->parameters() : 0;
1672 // size_t param_size = params ? params->length() : 0;
1673 for (size_t i = 0, L = arglist->length(); i < L; ++i) {
1674 Expression_Obj expr = arglist->value_at_index(i);
1675 // if (params && params->has_rest_parameter()) {
1676 // Parameter_Obj p = param_size > i ? (*params)[i] : 0;
1677 // List_Ptr list = Cast<List>(expr);
1678 // if (list && p && !p->is_rest_parameter()) expr = (*list)[0];
1680 if (arglist->is_arglist()) {
1681 Expression_Obj obj = arglist->at(i);
1682 Argument_Obj arg = (Argument_Ptr) obj.ptr(); // XXX
1683 args->append(SASS_MEMORY_NEW(Argument,
1686 arg ? arg->name() : "",
1687 arg ? arg->is_rest_argument() : false,
1688 arg ? arg->is_keyword_argument() : false));
1690 args->append(SASS_MEMORY_NEW(Argument, pstate, expr));
1693 Function_Call_Obj func = SASS_MEMORY_NEW(Function_Call, pstate, name, args);
1694 Expand expand(ctx, &d_env, backtrace, &selector_stack);
1695 func->via_call(true); // calc invoke is allowed
1696 return func->perform(&expand.eval);
1700 ////////////////////
1701 // BOOLEAN FUNCTIONS
1702 ////////////////////
1704 Signature not_sig = "not($value)";
1707 return SASS_MEMORY_NEW(Boolean, pstate, ARG("$value", Expression)->is_false());
1710 Signature if_sig = "if($condition, $if-true, $if-false)";
1711 // BUILT_IN(sass_if)
1712 // { return ARG("$condition", Expression)->is_false() ? ARG("$if-false", Expression) : ARG("$if-true", Expression); }
1715 Expand expand(ctx, &d_env, backtrace, &selector_stack);
1716 Expression_Obj cond = ARG("$condition", Expression)->perform(&expand.eval);
1717 bool is_true = !cond->is_false();
1718 Expression_Ptr res = ARG(is_true ? "$if-true" : "$if-false", Expression);
1719 res = res->perform(&expand.eval);
1720 res->set_delayed(false); // clone?
1724 //////////////////////////
1725 // MISCELLANEOUS FUNCTIONS
1726 //////////////////////////
1728 // value.check_deprecated_interp if value.is_a?(Sass::Script::Value::String)
1729 // unquoted_string(value.to_sass)
1731 Signature inspect_sig = "inspect($value)";
1734 Expression_Ptr v = ARG("$value", Expression);
1735 if (v->concrete_type() == Expression::NULL_VAL) {
1736 return SASS_MEMORY_NEW(String_Quoted, pstate, "null");
1737 } else if (v->concrete_type() == Expression::BOOLEAN && v->is_false()) {
1738 return SASS_MEMORY_NEW(String_Quoted, pstate, "false");
1739 } else if (v->concrete_type() == Expression::STRING) {
1742 // ToDo: fix to_sass for nested parentheses
1743 Sass_Output_Style old_style;
1744 old_style = ctx.c_options.output_style;
1745 ctx.c_options.output_style = TO_SASS;
1746 Emitter emitter(ctx.c_options);
1748 i.in_declaration = false;
1750 ctx.c_options.output_style = old_style;
1751 return SASS_MEMORY_NEW(String_Quoted, pstate, i.get_buffer());
1755 Signature selector_nest_sig = "selector-nest($selectors...)";
1756 BUILT_IN(selector_nest)
1758 List_Ptr arglist = ARG("$selectors", List);
1760 // Not enough parameters
1761 if( arglist->length() == 0 )
1762 error("$selectors: At least one selector must be passed for `selector-nest'", pstate);
1764 // Parse args into vector of selectors
1765 std::vector<Selector_List_Obj> parsedSelectors;
1766 for (size_t i = 0, L = arglist->length(); i < L; ++i) {
1767 Expression_Obj exp = Cast<Expression>(arglist->value_at_index(i));
1768 if (exp->concrete_type() == Expression::NULL_VAL) {
1769 std::stringstream msg;
1770 msg << "$selectors: null is not a valid selector: it must be a string,\n";
1771 msg << "a list of strings, or a list of lists of strings for 'selector-nest'";
1772 error(msg.str(), pstate);
1774 if (String_Constant_Obj str = Cast<String_Constant>(exp)) {
1777 std::string exp_src = exp->to_string(ctx.c_options);
1778 Selector_List_Obj sel = Parser::parse_selector(exp_src.c_str(), ctx);
1779 parsedSelectors.push_back(sel);
1783 if( parsedSelectors.empty() ) {
1784 return SASS_MEMORY_NEW(Null, pstate);
1787 // Set the first element as the `result`, keep appending to as we go down the parsedSelector vector.
1788 std::vector<Selector_List_Obj>::iterator itr = parsedSelectors.begin();
1789 Selector_List_Obj result = *itr;
1792 for(;itr != parsedSelectors.end(); ++itr) {
1793 Selector_List_Obj child = *itr;
1794 std::vector<Complex_Selector_Obj> exploded;
1795 selector_stack.push_back(result);
1796 Selector_List_Obj rv = child->resolve_parent_refs(ctx, selector_stack);
1797 selector_stack.pop_back();
1798 for (size_t m = 0, mLen = rv->length(); m < mLen; ++m) {
1799 exploded.push_back((*rv)[m]);
1801 result->elements(exploded);
1805 return result->perform(&listize);
1808 Signature selector_append_sig = "selector-append($selectors...)";
1809 BUILT_IN(selector_append)
1811 List_Ptr arglist = ARG("$selectors", List);
1813 // Not enough parameters
1814 if( arglist->length() == 0 )
1815 error("$selectors: At least one selector must be passed for `selector-append'", pstate);
1817 // Parse args into vector of selectors
1818 std::vector<Selector_List_Obj> parsedSelectors;
1819 for (size_t i = 0, L = arglist->length(); i < L; ++i) {
1820 Expression_Obj exp = Cast<Expression>(arglist->value_at_index(i));
1821 if (exp->concrete_type() == Expression::NULL_VAL) {
1822 std::stringstream msg;
1823 msg << "$selectors: null is not a valid selector: it must be a string,\n";
1824 msg << "a list of strings, or a list of lists of strings for 'selector-append'";
1825 error(msg.str(), pstate);
1827 if (String_Constant_Ptr str = Cast<String_Constant>(exp)) {
1830 std::string exp_src = exp->to_string();
1831 Selector_List_Obj sel = Parser::parse_selector(exp_src.c_str(), ctx);
1832 parsedSelectors.push_back(sel);
1836 if( parsedSelectors.empty() ) {
1837 return SASS_MEMORY_NEW(Null, pstate);
1840 // Set the first element as the `result`, keep appending to as we go down the parsedSelector vector.
1841 std::vector<Selector_List_Obj>::iterator itr = parsedSelectors.begin();
1842 Selector_List_Obj result = *itr;
1845 for(;itr != parsedSelectors.end(); ++itr) {
1846 Selector_List_Obj child = *itr;
1847 std::vector<Complex_Selector_Obj> newElements;
1849 // For every COMPLEX_SELECTOR in `result`
1850 // For every COMPLEX_SELECTOR in `child`
1851 // let parentSeqClone equal a copy of result->elements[i]
1852 // let childSeq equal child->elements[j]
1853 // Append all of childSeq head elements into parentSeqClone
1854 // Set the innermost tail of parentSeqClone, to childSeq's tail
1855 // Replace result->elements with newElements
1856 for (size_t i = 0, resultLen = result->length(); i < resultLen; ++i) {
1857 for (size_t j = 0, childLen = child->length(); j < childLen; ++j) {
1858 Complex_Selector_Obj parentSeqClone = SASS_MEMORY_CLONE((*result)[i]);
1859 Complex_Selector_Obj childSeq = (*child)[j];
1860 Complex_Selector_Obj base = childSeq->tail();
1862 // Must be a simple sequence
1863 if( childSeq->combinator() != Complex_Selector::Combinator::ANCESTOR_OF ) {
1864 std::string msg("Can't append \"");
1865 msg += childSeq->to_string();
1867 msg += parentSeqClone->to_string();
1868 msg += "\" for `selector-append'";
1869 error(msg, pstate, backtrace);
1872 // Cannot be a Universal selector
1873 Element_Selector_Obj pType = Cast<Element_Selector>(childSeq->head()->first());
1874 if(pType && pType->name() == "*") {
1875 std::string msg("Can't append \"");
1876 msg += childSeq->to_string();
1878 msg += parentSeqClone->to_string();
1879 msg += "\" for `selector-append'";
1880 error(msg, pstate, backtrace);
1883 // TODO: Add check for namespace stuff
1885 // append any selectors in childSeq's head
1886 parentSeqClone->innermost()->head()->concat(base->head());
1888 // Set parentSeqClone new tail
1889 parentSeqClone->innermost()->tail( base->tail() );
1891 newElements.push_back(parentSeqClone);
1895 result->elements(newElements);
1899 return result->perform(&listize);
1902 Signature selector_unify_sig = "selector-unify($selector1, $selector2)";
1903 BUILT_IN(selector_unify)
1905 Selector_List_Obj selector1 = ARGSEL("$selector1", Selector_List_Obj, p_contextualize);
1906 Selector_List_Obj selector2 = ARGSEL("$selector2", Selector_List_Obj, p_contextualize);
1908 Selector_List_Obj result = selector1->unify_with(selector2, ctx);
1910 return result->perform(&listize);
1913 Signature simple_selectors_sig = "simple-selectors($selector)";
1914 BUILT_IN(simple_selectors)
1916 Compound_Selector_Obj sel = ARGSEL("$selector", Compound_Selector_Obj, p_contextualize);
1918 List_Ptr l = SASS_MEMORY_NEW(List, sel->pstate(), sel->length(), SASS_COMMA);
1920 for (size_t i = 0, L = sel->length(); i < L; ++i) {
1921 Simple_Selector_Obj ss = (*sel)[i];
1922 std::string ss_string = ss->to_string() ;
1924 l->append(SASS_MEMORY_NEW(String_Quoted, ss->pstate(), ss_string));
1930 Signature selector_extend_sig = "selector-extend($selector, $extendee, $extender)";
1931 BUILT_IN(selector_extend)
1933 Selector_List_Obj selector = ARGSEL("$selector", Selector_List_Obj, p_contextualize);
1934 Selector_List_Obj extendee = ARGSEL("$extendee", Selector_List_Obj, p_contextualize);
1935 Selector_List_Obj extender = ARGSEL("$extender", Selector_List_Obj, p_contextualize);
1937 Subset_Map subset_map;
1938 extender->populate_extends(extendee, ctx, subset_map);
1940 Selector_List_Obj result = Extend::extendSelectorList(selector, ctx, subset_map, false);
1943 return result->perform(&listize);
1946 Signature selector_replace_sig = "selector-replace($selector, $original, $replacement)";
1947 BUILT_IN(selector_replace)
1949 Selector_List_Obj selector = ARGSEL("$selector", Selector_List_Obj, p_contextualize);
1950 Selector_List_Obj original = ARGSEL("$original", Selector_List_Obj, p_contextualize);
1951 Selector_List_Obj replacement = ARGSEL("$replacement", Selector_List_Obj, p_contextualize);
1952 Subset_Map subset_map;
1953 replacement->populate_extends(original, ctx, subset_map);
1955 Selector_List_Obj result = Extend::extendSelectorList(selector, ctx, subset_map, true);
1958 return result->perform(&listize);
1961 Signature selector_parse_sig = "selector-parse($selector)";
1962 BUILT_IN(selector_parse)
1964 Selector_List_Obj sel = ARGSEL("$selector", Selector_List_Obj, p_contextualize);
1967 return sel->perform(&listize);
1970 Signature is_superselector_sig = "is-superselector($super, $sub)";
1971 BUILT_IN(is_superselector)
1973 Selector_List_Obj sel_sup = ARGSEL("$super", Selector_List_Obj, p_contextualize);
1974 Selector_List_Obj sel_sub = ARGSEL("$sub", Selector_List_Obj, p_contextualize);
1975 bool result = sel_sup->is_superselector_of(sel_sub);
1976 return SASS_MEMORY_NEW(Boolean, pstate, result);
1979 Signature unique_id_sig = "unique-id()";
1982 std::stringstream ss;
1983 std::uniform_real_distribution<> distributor(0, 4294967296); // 16^8
1984 uint_fast32_t distributed = static_cast<uint_fast32_t>(distributor(rand));
1985 ss << "u" << std::setfill('0') << std::setw(8) << std::hex << distributed;
1986 return SASS_MEMORY_NEW(String_Quoted, pstate, ss.str());
1989 Signature is_bracketed_sig = "is-bracketed($list)";
1990 BUILT_IN(is_bracketed)
1992 Value_Obj value = ARG("$list", Value);
1993 List_Obj list = Cast<List>(value);
1994 return SASS_MEMORY_NEW(Boolean, pstate, list && list->is_bracketed());