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+/**
+ * Copyright (c) 2019, Timothy Stack
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of Timothy Stack nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <string>
+
+#include "styling.hh"
+
+#include "ansi-palette-json.h"
+#include "config.h"
+#include "fmt/format.h"
+#include "xterm-palette-json.h"
+#include "yajlpp/yajlpp.hh"
+#include "yajlpp/yajlpp_def.hh"
+
+static const struct json_path_container term_color_rgb_handler = {
+ yajlpp::property_handler("r").for_field(&rgb_color::rc_r),
+ yajlpp::property_handler("g").for_field(&rgb_color::rc_g),
+ yajlpp::property_handler("b").for_field(&rgb_color::rc_b),
+};
+
+static const struct json_path_container term_color_handler = {
+ yajlpp::property_handler("colorId").for_field(&term_color::xc_id),
+ yajlpp::property_handler("name").for_field(&term_color::xc_name),
+ yajlpp::property_handler("hexString").for_field(&term_color::xc_hex),
+ yajlpp::property_handler("rgb")
+ .for_child(&term_color::xc_color)
+ .with_children(term_color_rgb_handler),
+};
+
+static const struct json_path_container root_color_handler = {
+ yajlpp::property_handler("#")
+ .with_obj_provider<term_color, std::vector<term_color>>(
+ [](const yajlpp_provider_context& ypc,
+ std::vector<term_color>* palette) {
+ if (ypc.ypc_index >= palette->size()) {
+ palette->resize(ypc.ypc_index + 1);
+ }
+ return &((*palette)[ypc.ypc_index]);
+ })
+ .with_children(term_color_handler),
+};
+
+term_color_palette*
+xterm_colors()
+{
+ static term_color_palette retval(xterm_palette_json.get_name(),
+ xterm_palette_json.to_string_fragment());
+
+ return &retval;
+}
+
+term_color_palette*
+ansi_colors()
+{
+ static term_color_palette retval(ansi_palette_json.get_name(),
+ ansi_palette_json.to_string_fragment());
+
+ return &retval;
+}
+
+Result<rgb_color, std::string>
+rgb_color::from_str(const string_fragment& sf)
+{
+ if (sf.empty()) {
+ return Ok(rgb_color());
+ }
+
+ rgb_color rgb_out;
+
+ if (sf[0] == '#') {
+ switch (sf.length()) {
+ case 4:
+ if (sscanf(sf.data(),
+ "#%1hx%1hx%1hx",
+ &rgb_out.rc_r,
+ &rgb_out.rc_g,
+ &rgb_out.rc_b)
+ == 3)
+ {
+ rgb_out.rc_r |= rgb_out.rc_r << 4;
+ rgb_out.rc_g |= rgb_out.rc_g << 4;
+ rgb_out.rc_b |= rgb_out.rc_b << 4;
+ return Ok(rgb_out);
+ }
+ break;
+ case 7:
+ if (sscanf(sf.data(),
+ "#%2hx%2hx%2hx",
+ &rgb_out.rc_r,
+ &rgb_out.rc_g,
+ &rgb_out.rc_b)
+ == 3)
+ {
+ return Ok(rgb_out);
+ }
+ break;
+ }
+
+ return Err(fmt::format(FMT_STRING("Could not parse color: {}"), sf));
+ }
+
+ for (const auto& xc : xterm_colors()->tc_palette) {
+ if (sf.iequal(xc.xc_name)) {
+ return Ok(xc.xc_color);
+ }
+ }
+
+ return Err(fmt::format(
+ FMT_STRING(
+ "Unknown color: '{}'. "
+ "See https://jonasjacek.github.io/colors/ for a list of supported "
+ "color names"),
+ sf));
+}
+
+bool
+rgb_color::operator<(const rgb_color& rhs) const
+{
+ if (rc_r < rhs.rc_r)
+ return true;
+ if (rhs.rc_r < rc_r)
+ return false;
+ if (rc_g < rhs.rc_g)
+ return true;
+ if (rhs.rc_g < rc_g)
+ return false;
+ return rc_b < rhs.rc_b;
+}
+
+bool
+rgb_color::operator>(const rgb_color& rhs) const
+{
+ return rhs < *this;
+}
+
+bool
+rgb_color::operator<=(const rgb_color& rhs) const
+{
+ return !(rhs < *this);
+}
+
+bool
+rgb_color::operator>=(const rgb_color& rhs) const
+{
+ return !(*this < rhs);
+}
+
+bool
+rgb_color::operator==(const rgb_color& rhs) const
+{
+ return rc_r == rhs.rc_r && rc_g == rhs.rc_g && rc_b == rhs.rc_b;
+}
+
+bool
+rgb_color::operator!=(const rgb_color& rhs) const
+{
+ return !(rhs == *this);
+}
+
+term_color_palette::term_color_palette(const char* name,
+ const string_fragment& json)
+{
+ yajlpp_parse_context ypc_xterm(intern_string::lookup(name),
+ &root_color_handler);
+ yajl_handle handle;
+
+ handle = yajl_alloc(&ypc_xterm.ypc_callbacks, nullptr, &ypc_xterm);
+ ypc_xterm.with_ignore_unused(true)
+ .with_obj(this->tc_palette)
+ .with_handle(handle);
+ yajl_status st = ypc_xterm.parse(json);
+ ensure(st == yajl_status_ok);
+ st = ypc_xterm.complete_parse();
+ ensure(st == yajl_status_ok);
+ yajl_free(handle);
+
+ for (auto& xc : this->tc_palette) {
+ xc.xc_lab_color = lab_color(xc.xc_color);
+ }
+}
+
+short
+term_color_palette::match_color(const lab_color& to_match)
+{
+ double lowest = 1000.0;
+ short lowest_id = -1;
+
+ for (auto& xc : this->tc_palette) {
+ double xc_delta = xc.xc_lab_color.deltaE(to_match);
+
+ if (lowest_id == -1) {
+ lowest = xc_delta;
+ lowest_id = xc.xc_id;
+ continue;
+ }
+
+ if (xc_delta < lowest) {
+ lowest = xc_delta;
+ lowest_id = xc.xc_id;
+ }
+ }
+
+ return lowest_id;
+}
+
+namespace styling {
+
+Result<color_unit, std::string>
+color_unit::from_str(const string_fragment& sf)
+{
+ if (sf == "semantic()") {
+ return Ok(color_unit{semantic{}});
+ }
+
+ auto retval = TRY(rgb_color::from_str(sf));
+
+ return Ok(color_unit{retval});
+}
+
+} // namespace styling