# Copyright 2021 Google Inc.
#
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import("../../gn/skia.gni")
import("../../third_party/icu/icu.gni")
import("skunicode.gni")

declare_args() {
  skia_use_runtime_icu = false
  skunicode_tests_enabled = true
}

if (skia_use_icu || skia_use_client_icu || skia_use_libgrapheme ||
    skia_use_icu4x) {
  config("public_config") {
    defines = [ "SK_UNICODE_AVAILABLE" ]
    if (skia_use_icu) {
      defines += [ "SK_UNICODE_ICU_IMPLEMENTATION" ]
    }
    if (skia_use_client_icu) {
      defines += [ "SK_UNICODE_CLIENT_IMPLEMENTATION" ]
    }
    if (skia_use_libgrapheme) {
      defines += [ "SK_UNICODE_LIBGRAPHEME_IMPLEMENTATION" ]
    }
    if (skia_use_icu4x) {
      defines += [ "SK_UNICODE_ICU4X_IMPLEMENTATION" ]
    }
  }

  config("cpp20") {
    if (is_win) {
      cflags_cc = [ "/std:c++20" ]
    } else {
      cflags_cc = [ "-std=c++20" ]
    }
  }

  config("module") {
    defines = [ "SKUNICODE_IMPLEMENTATION=1" ]
    if (is_component_build) {
      defines += [ "SKUNICODE_DLL" ]
    }
  }

  component("skunicode_core") {
    check_includes = false
    deps = [ "../..:skia" ]
    configs += [
      ":module",
      "../../:skia_private",
      "../../third_party/icu/config:no_cxx",
    ]
    sources = skia_unicode_sources
  }

  if (skia_use_icu) {
    component("skunicode_icu") {
      check_includes = false
      deps = [
        ":skunicode_core",
        "../..:skia",
      ]
      configs += [
        ":module",
        "../../:skia_private",
        "../../third_party/icu/config:no_cxx",
      ]

      # These are explicitly *not* public defines because we don't want them
      # to leak to dependents.
      defines = [ "U_USING_ICU_NAMESPACE=0" ]
      if (!skia_use_system_icu) {
        defines += [ "U_DISABLE_RENAMING=1" ]
      }

      sources = skia_unicode_icu_bidi_sources
      sources += skia_unicode_bidi_full_sources
      sources += skia_unicode_icu_sources

      # only available for Android at the moment
      if (skia_use_runtime_icu && (is_android || is_linux)) {
        sources += skia_unicode_runtime_icu_sources
        defines += [ "SK_UNICODE_RUNTIME_ICU_AVAILABLE" ]
        deps += [ "//third_party/icu:headers" ]
      } else {
        sources += skia_unicode_builtin_icu_sources
        deps += [ "//third_party/icu" ]
      }
    }
  }

  if (skia_use_client_icu) {
    component("skunicode_client_icu") {
      check_includes = false
      deps = [
        ":skunicode_core",
        "../..:skia",
      ]
      configs += [
        ":module",
        "../../:skia_private",
        "../../third_party/icu/config:no_cxx",
      ]
      defines = [
        # In order to use the bidi_subset at the same time as "full ICU", we must have
        # compiled icu with the given defines also being set. This is to make sure the functions
        # we call are given a suffix of "_skia" to prevent ODR violations if this "subset of ICU"
        # is compiled alongside a full ICU build also.
        # See https://chromium.googlesource.com/chromium/deps/icu.git/+/d94ab131bc8fef3bc17f356a628d8e4cd44d65d9/source/common/unicode/uversion.h
        # for how these are used.
        "U_DISABLE_RENAMING=0",
        "U_USING_ICU_NAMESPACE=0",
        "U_LIB_SUFFIX_C_NAME=_skia",
        "U_HAVE_LIB_SUFFIX=1",
        "U_DISABLE_VERSION_SUFFIX=1",
      ]

      sources = skia_unicode_icu_bidi_sources
      sources += skia_unicode_bidi_subset_sources
      sources += skia_unicode_client_icu_sources
      deps += [ skia_icu_bidi_third_party_dir ]
    }
  }

  if (skia_use_libgrapheme) {
    component("skunicode_libgrapheme") {
      check_includes = false
      deps = [
        ":skunicode_core",
        "../..:skia",
      ]
      configs += [
        ":module",
        "../../:skia_private",
        "../../third_party/icu/config:no_cxx",
      ]
      defines = [
        "U_DISABLE_RENAMING=0",
        "U_USING_ICU_NAMESPACE=0",
        "U_LIB_SUFFIX_C_NAME=_skia",
        "U_HAVE_LIB_SUFFIX=1",
        "U_DISABLE_VERSION_SUFFIX=1",
      ]

      sources = skia_unicode_icu_bidi_sources
      sources += skia_unicode_bidi_subset_sources

      sources += skia_unicode_libgrapheme_sources
      deps += [
        skia_icu_bidi_third_party_dir,
        skia_libgrapheme_third_party_dir,
      ]
    }
  }

  if (skia_use_icu4x) {
    component("skunicode_icu4x") {
      check_includes = false
      deps = [
        ":skunicode_core",
        "../..:skia",
      ]
      configs += [
        ":module",
        "../../:skia_private",
        "../../third_party/icu/config:no_cxx",
      ]

      sources = skia_unicode_icu4x_sources

      deps += [ "//third_party/icu4x" ]
    }
  }

  group("skunicode") {
    public_configs = [ ":public_config" ]
    public_deps = [ ":skunicode_core" ]

    # We have these different flavors of skunicode as independent components because
    # we have to set different defines for different builds of ICU.
    if (skia_use_icu) {
      public_deps += [ ":skunicode_icu" ]
    }
    if (skia_use_client_icu) {
      public_deps += [ ":skunicode_client_icu" ]
    }
    if (skia_use_libgrapheme) {
      public_deps += [ ":skunicode_libgrapheme" ]
    }
    if (skia_use_icu4x) {
      public_deps += [ ":skunicode_icu4x" ]
    }
  }

  if (defined(is_skia_standalone) && skia_enable_tools) {
    skia_source_set("tests") {
      if (skunicode_tests_enabled &&
          (skia_use_icu || skia_use_libgrapheme || skia_use_icu4x)) {
        testonly = true
        deps = [
          ":skunicode",
          "../..:skia",
          "../..:test",
        ]
        sources = skia_unicode_tests
        deps += [ skia_icu_bidi_third_party_dir ]
      } else {
        sources = []
      }
    }
  }
} else {
  group("skunicode") {
  }
  group("tests") {
  }
}