# Copyright 2014 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.

import("//third_party/WebKit/Source/core/core_idl_files.gni")
import("//third_party/WebKit/Source/modules/modules_idl_files.gni")

bindings_scripts_dir = get_path_info(".", "abspath")
bindings_scripts_output_dir = "$root_gen_dir/blink/bindings/scripts"

jinja_module_files = [
  "//third_party/jinja2/__init__.py",
  "//third_party/markupsafe/__init__.py",  # jinja2 dep
]

idl_lexer_parser_files = get_path_info([
                                         # PLY (Python Lex-Yacc)
                                         "//third_party/ply/lex.py",
                                         "//third_party/ply/yacc.py",

                                         # Web IDL lexer/parser (base parser)
                                         "//tools/idl_parser/idl_lexer.py",
                                         "//tools/idl_parser/idl_node.py",
                                         "//tools/idl_parser/idl_parser.py",

                                         # Blink IDL lexer/parser/constructor
                                         "blink_idl_lexer.py",
                                         "blink_idl_parser.py",
                                       ],
                                       "abspath")
idl_compiler_files = get_path_info([
                                     "idl_compiler.py",

                                     # Blink IDL front end (ex-lexer/parser)
                                     "idl_definitions.py",
                                     "idl_reader.py",
                                     "idl_types.py",
                                     "idl_validator.py",
                                     "interface_dependency_resolver.py",

                                     # V8 code generator
                                     "code_generator.py",
                                     "code_generator_v8.py",
                                     "code_generator_web_agent_api.py",
                                     "v8_attributes.py",
                                     "v8_callback_function.py",
                                     "v8_callback_interface.py",
                                     "v8_dictionary.py",
                                     "v8_globals.py",
                                     "v8_interface.py",
                                     "v8_methods.py",
                                     "v8_types.py",
                                     "v8_union.py",
                                     "v8_utilities.py",
                                   ],
                                   "abspath")

# Calls the compute_interfaces_info_individual script.
#
# Parameters:
#   sources = list of IDL files to pass as inputs
#   interfaces_info_file = output pickle file for interfaces info.
#   component_info_file = output pickle file for component wide info.
#   deps = dependencies
template("compute_interfaces_info_individual") {
  action(target_name) {
    script = "$bindings_scripts_dir/compute_interfaces_info_individual.py"
    if (defined(invoker.visibility)) {
      visibility = invoker.visibility
    }

    inputs = [ "$bindings_scripts_dir/utilities.py" ] + invoker.sources
    outputs = [
      invoker.interfaces_info_file,
      invoker.component_info_file,
    ]

    response_file_contents = rebase_path(invoker.sources, root_build_dir)
    args = [
      "--cache-directory",
      rebase_path(bindings_scripts_output_dir, root_build_dir),
      "--idl-files-list",
      "{{response_file_name}}",
      "--interfaces-info-file",
      rebase_path(invoker.interfaces_info_file, root_build_dir),
      "--component-info-file",
      rebase_path(invoker.component_info_file, root_build_dir),
    ]

    deps = [ "//third_party/WebKit/Source/bindings/scripts:cached_lex_yacc_tables" ] + invoker.deps
  }
}

# Calls generate_event_interfaces
#
# Parameters:
#   sources = A list of IDL files to process.
#   output_file = The .in file to write, relative to the blink_gen_dir.
#   suffix = (Optional) String to be passed to script via --suffix
template("generate_event_interfaces") {
  action(target_name) {
    # Write the file list to a unique temp file to avoid blowing out the
    # command line length limit.
    idl_files_list = "$target_gen_dir/${target_name}_file_list.tmp"
    write_file(idl_files_list, rebase_path(invoker.sources, root_build_dir))

    inputs = [
               "//third_party/WebKit/Source/bindings/scripts/utilities.py",
               idl_files_list,
             ] + invoker.sources

    output_file = "$root_gen_dir/blink/" + invoker.output_file
    outputs = [
      output_file,
    ]

    script = "//third_party/WebKit/Source/bindings/scripts/generate_event_interfaces.py"
    args = [
      "--event-idl-files-list",
      rebase_path(idl_files_list, root_build_dir),
      "--event-interfaces-file",
      rebase_path(output_file, root_build_dir),
    ]

    if (defined(invoker.suffix)) {
      args += [
        "--suffix",
        invoker.suffix,
      ]
    }
  }
}

# Runs the idl_compiler script over a list of sources.
#
# Parameters:
#   sources = list of IDL files to compile
#   output_dir = string containing the directory to put the output files.
#   output_name_suffix = a suffix after the basename of the output file names.
#   target_component = component to generate code for.
template("idl_compiler") {
  output_dir = invoker.output_dir
  output_name_suffix = invoker.output_name_suffix

  # TODO(brettw): we used to add a "-S" before the script name to skip
  # "import site" to speed up startup. Figure out if we need this and do
  # something similar (not really expressible in GN now).
  _script = "//third_party/WebKit/Source/bindings/scripts/idl_compiler.py"
  _inputs = idl_lexer_parser_files + idl_compiler_files  # to be explicit (covered by parsetab)
  _inputs += [
    "$bindings_scripts_output_dir/lextab.py",
    "$bindings_scripts_output_dir/parsetab.pickle",
    "$bindings_scripts_output_dir/cached_jinja_templates.stamp",
    "$bindings_dir/IDLExtendedAttributes.txt",

    # If the dependency structure or public interface info (e.g.,
    # [ImplementedAs]) changes, we rebuild all files, since we're not
    # computing dependencies file-by-file in the build.
    # This data is generally stable.
    "$bindings_modules_output_dir/InterfacesInfoOverall.pickle",
  ]

  # Further, if any dependency (partial interface or implemented
  # interface) changes, rebuild everything, since every IDL potentially
  # depends on them, because we're not computing dependencies
  # file-by-file.
  # FIXME: This is too conservative, and causes excess rebuilds:
  # compute this file-by-file.  http://crbug.com/341748
  # This should theoretically just be the IDL files passed in.
  _inputs += core_all_dependency_idl_files + modules_all_dependency_idl_files

  _public_deps = [
    "//third_party/WebKit/Source/bindings/core:core_global_constructors_idls",

    # FIXME: should be interfaces_info_core (w/o modules)
    # http://crbug.com/358074
    "//third_party/WebKit/Source/bindings/modules:interfaces_info",
    "//third_party/WebKit/Source/bindings/modules:modules_core_global_constructors_idls",
    "//third_party/WebKit/Source/bindings/modules:modules_global_constructors_idls",
    "//third_party/WebKit/Source/bindings/scripts:cached_jinja_templates",
    "//third_party/WebKit/Source/bindings/scripts:cached_lex_yacc_tables",
    "//third_party/WebKit/Source/core:generated_testing_idls",
  ]

  # On mac spawning a python process per IDL file is slow. Use a single action
  # instead.
  # TODO(bashi,tikuta): Use a pool when crbug.com/635308 is fixed.
  if (is_mac) {
    action(target_name) {
      script = _script
      inputs = _inputs
      public_deps = _public_deps

      sources = invoker.sources
      outputs = []
      foreach(_source, sources) {
        _name_part = get_path_info(_source, "name")
        outputs += [
          "$output_dir/V8${_name_part}${output_name_suffix}.cpp",
          "$output_dir/V8${_name_part}${output_name_suffix}.h",
        ]
      }

      idl_files_list = "$target_gen_dir/${target_name}_file_list.tmp"
      write_file(idl_files_list, rebase_path(invoker.sources, root_build_dir))
      inputs += [ idl_files_list ]

      args = [
        "--cache-dir",
        rebase_path(bindings_scripts_output_dir, root_build_dir),
        "--output-dir",
        rebase_path(output_dir, root_build_dir),
        "--info-dir",
        rebase_path("$bindings_output_dir", root_build_dir),
        "--target-component",
        invoker.target_component,
        "--read-idl-list-from-file",
        rebase_path(idl_files_list, root_build_dir),
      ]
    }
  } else {
    action_foreach(target_name) {
      script = _script
      inputs = _inputs
      public_deps = _public_deps

      sources = invoker.sources
      outputs = [
        "$output_dir/V8{{source_name_part}}${output_name_suffix}.cpp",
        "$output_dir/V8{{source_name_part}}${output_name_suffix}.h",
      ]

      args = [
        "--cache-dir",
        rebase_path(bindings_scripts_output_dir, root_build_dir),
        "--output-dir",
        rebase_path(output_dir, root_build_dir),
        "--info-dir",
        rebase_path("$bindings_output_dir", root_build_dir),
        "--target-component",
        invoker.target_component,
        "{{source}}",
      ]
    }
  }
}

# Runs the idl_compiler to generate IDL dictionary and union impl files.
#
# Parameters:
#   sources = a list of IDL files to process
#   outputs = a list of files to write to
#   output_dir = the directory to put the output files
#   target_component = component to generate code for
template("idl_impl") {
  dictionary_impl_output_dir = "$root_gen_dir/blink/"

  action(target_name) {
    script = "//third_party/WebKit/Source/bindings/scripts/idl_compiler.py"
    idl_files_list = "$target_gen_dir/${target_name}_file_list.tmp"
    write_file(idl_files_list, rebase_path(invoker.sources, root_build_dir))

    inputs = idl_lexer_parser_files + idl_compiler_files  # to be explicit (covered by parsetab)
    inputs += [
      "$bindings_scripts_output_dir/lextab.py",
      "$bindings_scripts_output_dir/parsetab.pickle",
      "$bindings_scripts_output_dir/cached_jinja_templates.stamp",
      "$bindings_dir/IDLExtendedAttributes.txt",
    ]
    inputs += [ idl_files_list ] + invoker.sources
    outputs = invoker.outputs

    args = [
      "--cache-dir",
      rebase_path(bindings_scripts_output_dir, root_build_dir),
      "--output-dir",
      rebase_path(invoker.output_dir, root_build_dir),
      "--impl-output-dir",
      rebase_path(dictionary_impl_output_dir, root_build_dir),
      "--info-dir",
      rebase_path("$bindings_output_dir", root_build_dir),
      "--target-component",
      invoker.target_component,
      "--generate-impl",
      rebase_path(idl_files_list, root_build_dir),
    ]

    deps = [
      # FIXME: should be interfaces_info_core (w/o modules)
      # http://crbug.com/358074
      "//third_party/WebKit/Source/bindings/core:interfaces_info_individual_core",
      "//third_party/WebKit/Source/bindings/modules:interfaces_info",
      "//third_party/WebKit/Source/bindings/modules:interfaces_info_individual_modules",
      "//third_party/WebKit/Source/bindings/scripts:cached_jinja_templates",
      "//third_party/WebKit/Source/bindings/scripts:cached_lex_yacc_tables",
    ]
  }
}

# Calls the aggregate_generated_bindings script.
#
# Parameters:
#   sources = a list of source IDL files.
#   component = a name of directory for these files (one word, no slashes).
#   outputs = a name of file to write to.
template("aggregate_generated_bindings") {
  action(target_name) {
    script = "//third_party/WebKit/Source/bindings/scripts/aggregate_generated_bindings.py"

    inputs = invoker.sources
    outputs = invoker.outputs

    response_file_contents = rebase_path(inputs, root_build_dir)
    args = [
      "--component",
      invoker.component,
      "{{response_file_name}}",
    ]
    args += rebase_path(outputs, root_build_dir)

    public_deps = invoker.public_deps
  }
}

# Calls the compute_global_objects script.
#
# Parameters:
#   sources = a list of source IDL files.
#   sources_generated = a list of generated pickle sources.
#   output_file = a pickle file to write to (need to specify directory)
#
template("compute_global_objects") {
  action(target_name) {
    script =
        "//third_party/WebKit/Source/bindings/scripts/compute_global_objects.py"

    # Write the file list to a unique temp file to avoid blowing out the
    # command line length limit.
    idl_files_list = "$target_gen_dir/${target_name}_file_list.tmp"
    write_file(idl_files_list, rebase_path(invoker.sources, root_build_dir))

    inputs = [
               "//third_party/WebKit/Source/bindings/scripts/utilities.py",
               idl_files_list,
             ] + invoker.sources_generated + invoker.sources

    outputs = [
      invoker.output_file,
    ]

    args = [
      "--idl-files-list",
      rebase_path(idl_files_list, root_build_dir),
    ]
    foreach(component, invoker.sources_generated) {
      args += [
        "--global-objects-component-files",
        rebase_path(component, root_build_dir),
      ]
    }
    args += [ rebase_path(invoker.output_file, root_build_dir) ]

    deps = invoker.deps
  }
}

# Calls the generate_global_constructors script.
#
# Parameters:
#   sources = a list of source IDL files.
#   global_objects_file = a global objects file generated by compute_global_objects
#   interfaces = interfaces to generate global constructors for.
#   component = component to generate global constructors for.
#   output_dir = output directory to generate idl files and header files.
#   deps = dependencies
#
template("generate_global_constructors") {
  action(target_name) {
    script = "//third_party/WebKit/Source/bindings/scripts/generate_global_constructors.py"

    # Write the file list to a unique temp file to avoid blowing out the
    # command line length limit.
    idl_files_list = "$target_gen_dir/${target_name}_file_list.tmp"
    write_file(idl_files_list, rebase_path(invoker.sources, root_build_dir))

    inputs = [
               "//third_party/WebKit/Source/bindings/scripts/utilities.py",
               idl_files_list,
               invoker.global_objects_file,
             ] + invoker.sources

    args = [
      "--idl-files-list",
      rebase_path(idl_files_list, root_build_dir),
      "--global-objects-file",
      rebase_path(invoker.global_objects_file, root_build_dir),
      "--",
    ]

    output_dir = invoker.output_dir
    component = invoker.component

    # generate outputs from invoker.interfaces.
    output_idl_files = []
    output_header_files = []
    foreach(interface, invoker.interfaces) {
      args += [ interface ]
      output_idl_file = "$output_dir/${interface}${component}Constructors.idl"
      args += [ rebase_path(output_idl_file, root_build_dir) ]
      output_idl_files += [ output_idl_file ]
      output_header_files +=
          [ "$output_dir/${interface}${component}Constructors.h" ]
    }

    outputs = output_idl_files + output_header_files
    deps = invoker.deps
  }
}