Adding upstream version 0.11.1.upstream/0.11.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 246 insertions, 0 deletions

diff --git a/src/styling.cc b/src/styling.cc
new file mode 100644
index 0000000..73e3db4
--- /dev/null
+++ b/src/styling.cc
@@ -0,0 +1,246 @@
+/**
+ * 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