[Chrome Colors] Generate icon data for preselected colors.

To display selected colors in the menu, generate icon data for all the
colors listed in selected_colors_info.h and write it out to
generated_colors_info.h

Bug: 960982
Change-Id: I4f0c82af64802073745920fe743ccdb736865442
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1636251
Commit-Queue: Gayane Petrosyan <gayane@chromium.org>
Reviewed-by: Gayane Petrosyan <gayane@chromium.org>
Reviewed-by: Kyle Milka <kmilka@chromium.org>
Cr-Commit-Position: refs/heads/master@{#665609}

chrome/browser/search/BUILD.gn

@@ -2,6 +2,8 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/compiled_action.gni")
+
 local_ntp_resources = "//chrome/browser/resources/local_ntp"
 
 action("local_ntp_code_generate") {
@@ -38,10 +40,30 @@ action("local_ntp_code_generate") {
   ]
 }
 
+executable("generate_colors_info") {
+  sources = [
+    "chrome_colors/generate_colors_info.cc",
+    "chrome_colors/selected_colors_info.h",
+  ]
+  deps = [
+    "//base",
+    "//skia",
+  ]
+}
+
+compiled_action("generate_chrome_colors_info") {
+  tool = ":generate_colors_info"
+  outputs = [
+    "$target_gen_dir/chrome_colors/",
+  ]
+  args = rebase_path(outputs, root_build_dir)
+}
+
 source_set("generated") {
   sources = get_target_outputs(":local_ntp_code_generate")
 
   public_deps = [
+    ":generate_chrome_colors_info",
     ":local_ntp_code_generate",
   ]
 }

chrome/browser/search/chrome_colors/generate_colors_info.cc

+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/base64.h"
+#include "base/files/file_util.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
+#include "chrome/browser/search/chrome_colors/selected_colors_info.h"
+
+// TODO(gayane): Replace with real template.
+// Template for the icon svg.
+// $1 - primary color
+// $2 - secondary color
+const char kIconTemplate[] =
+    "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><!DOCTYPE svg "
+    "PUBLIC \"-//W3C//DTD SVG 1.1//EN\" "
+    "\"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\"><svg version=\"1.1\" "
+    "xmlns=\"http://www.w3.org/2000/svg\" "
+    "xmlns:xlink=\"http://www.w3.org/1999/xlink\" "
+    "preserveAspectRatio=\"xMidYMid meet\" viewBox=\"0 0 640 640\" "
+    "width=\"640\" height=\"640\"><defs><path d=\"M0 0L640 0L640 640L0 640L0 "
+    "0Z\" id=\"a1Y0EmMoCp\"></path><path d=\"M499.23 317.62C499.23 396.82 "
+    "420.79 461.12 324.17 461.12C227.55 461.12 149.11 396.82 149.11 "
+    "317.62C149.11 238.42 227.55 174.12 324.17 174.12C420.79 174.12 499.23 "
+    "238.42 499.23 317.62Z\" id=\"f7eUC88KqB\"></path></defs><g><g><g "
+    "transform=\"matrix(1 0 0 1 0 0)\" "
+    "vector-effect=\"non-scaling-stroke\"><use xlink:href=\"#a1Y0EmMoCp\" "
+    "opacity=\"1\" fill=$1 fill-opacity=\"1\"></use></g><g><use "
+    "xlink:href=\"#f7eUC88KqB\" opacity=\"1\" fill=$2 "
+    "fill-opacity=\"1\"></use></g></g></g></svg>";
+
+// Template for color info line.
+// $1 - color id
+// $2 - red value of primary color
+// $3 - green value of primary color
+// $4 - blue value of primary color
+// $5 - color label
+// $6 - icon data
+const char kColorInfoLineTemplate[] =
+    "   ColorInfo($1, SkColorSetRGB($2, $3, $4), \"$5\", "
+    "\"data:image/svg+xml;base64,$6\")";
+
+// Template for the generated file content.
+// $1 - lines for updated color info.
+const char kFileContentTemplate[] =
+    "// Generated from generate_colors_info.cc. Do not edit!\n"
+    "\n"
+    "#ifndef CHROME_BROWSER_SEARCH_CHROME_COLORS_GENERATED_COLORS_INFO_H_\n"
+    "#define CHROME_BROWSER_SEARCH_CHROME_COLORS_GENERATED_COLORS_INFO_H_\n"
+    "\n"
+    "#include <stdint.h>\n"
+    "\n"
+    "#include \"chrome/common/search/instant_types.h\"\n"
+    "#include \"third_party/skia/include/core/SkColor.h\"\n"
+    "\n"
+    "namespace chrome_colors {\n"
+    "\n"
+    "// List of preselected colors with icon data to show in Chrome Colors"
+    " menu.\n"
+    "constexpr ColorInfo kGeneratedColorsInfo[] = {\n"
+    "$1\n"
+    "};\n"
+    "\n"
+    "} // namespace chrome_colors\n"
+    "\n"
+    "#endif  // CHROME_BROWSER_SEARCH_CHROME_COLORS_GENERATED_COLORS_INFO_H_\n";
+
+// Generated file name.
+const base::FilePath::CharType kColorsInfoFilename[] =
+    FILE_PATH_LITERAL("generated_colors_info.h");
+
+// Returns hex string representation for the |color| in "#FFFFFF" format.
+std::string SkColorToHexString(SkColor color) {
+  return base::StringPrintf("\"#%02X%02X%02X\"", SkColorGetR(color),
+                            SkColorGetG(color), SkColorGetB(color));
+}
+
+// Returns icon data for the given |color| as encoded svg.
+// The returned string can be later directly set in JS with the following
+// format: "data:image/svg+xml;base64<ENCODED_SVG>"
+std::string GenerateIconDataForColor(SkColor color) {
+  std::vector<std::string> subst;
+  subst.push_back(SkColorToHexString(color));
+  // TODO(gayane): Replace white will secondary color calculated using
+  // browser_theme_pack.
+  subst.push_back(SkColorToHexString(SK_ColorWHITE));
+
+  std::string svg_base64;
+  base::Base64Encode(
+      base::ReplaceStringPlaceholders(kIconTemplate, subst, NULL), &svg_base64);
+  return svg_base64;
+}
+
+// Generates color info line in the following format:
+// ColorInfo(ID, SkColorSetRGB(R, G, B), LABEL, ICON_DATA)
+std::string GenerateColorLine(chrome_colors::ColorInfo color_info) {
+  std::vector<std::string> subst;
+  subst.push_back(base::NumberToString(color_info.id));
+  subst.push_back(base::NumberToString(SkColorGetR(color_info.color)));
+  subst.push_back(base::NumberToString(SkColorGetG(color_info.color)));
+  subst.push_back(base::NumberToString(SkColorGetB(color_info.color)));
+  subst.push_back(color_info.label);
+  subst.push_back(GenerateIconDataForColor(color_info.color));
+  return base::ReplaceStringPlaceholders(kColorInfoLineTemplate, subst, NULL);
+}
+
+// Generates 'generated_colors_info.h' that contains selected colors from
+// |chrome_colors::kSelectedColorsInfo| along with generated icon data.
+void GenerateColorsInfoFile(std::string output_dir) {
+  std::vector<std::string> updated_color_info;
+  for (chrome_colors::ColorInfo color_info : chrome_colors::kSelectedColorsInfo)
+    updated_color_info.push_back(GenerateColorLine(color_info));
+
+  std::vector<std::string> subst;
+  subst.push_back(base::JoinString(updated_color_info, ",\n"));
+  std::string output =
+      base::ReplaceStringPlaceholders(kFileContentTemplate, subst, NULL);
+
+  base::FilePath output_path = base::FilePath::FromUTF8Unsafe(output_dir);
+  if (!base::DirectoryExists(output_path))
+    base::CreateDirectory(output_path);
+
+  output_path = output_path.Append(kColorsInfoFilename);
+  if (base::WriteFile(output_path, output.c_str(),
+                      static_cast<uint32_t>(output.size())) <= 0) {
+    LOG(ERROR) << "Failed to write output to " << output_path;
+  }
+}
+
+int main(int argc, char* argv[]) {
+  GenerateColorsInfoFile(argv[1]);
+  return 0;
+}

chrome/browser/search/chrome_colors/selected_colors_info.h

+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_SEARCH_CHROME_COLORS_SELECTED_COLORS_INFO_H_
+#define CHROME_BROWSER_SEARCH_CHROME_COLORS_SELECTED_COLORS_INFO_H_
+
+#include <stdint.h>
+
+#include "third_party/skia/include/core/SkColor.h"
+
+namespace chrome_colors {
+
+struct ColorInfo {
+  ColorInfo(int id, SkColor color, const char* label)
+      : id(id), color(color), label(label) {}
+  constexpr ColorInfo(int id,
+                      SkColor color,
+                      const char* label,
+                      const char* icon_data)
+      : id(id), color(color), label(label), icon_data(icon_data) {}
+  int id;
+  SkColor color;
+  const char* label;
+  const char* icon_data;
+};
+
+// TODO(gayane): Add colors selected by UX.
+// List of preselected colors to show in Chrome Colors menu.
+const ColorInfo kSelectedColorsInfo[] = {};
+
+}  // namespace chrome_colors
+
+#endif  // CHROME_BROWSER_SEARCH_CHROME_COLORS_SELECTED_COLORS_INFO_H_