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// 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.
#include "tools/gn/visibility.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_util.h"
#include "tools/gn/err.h"
#include "tools/gn/filesystem_utils.h"
#include "tools/gn/item.h"
#include "tools/gn/label.h"
#include "tools/gn/scope.h"
#include "tools/gn/value.h"
#include "tools/gn/variables.h"
Visibility::Visibility() {
}
Visibility::~Visibility() {
}
bool Visibility::Set(const SourceDir& current_dir,
const Value& value,
Err* err) {
patterns_.clear();
if (!value.VerifyTypeIs(Value::LIST, err)) {
CHECK(err->has_error());
return false;
}
for (const auto& item : value.list_value()) {
patterns_.push_back(LabelPattern::GetPattern(current_dir, item, err));
if (err->has_error())
return false;
}
return true;
}
void Visibility::SetPublic() {
patterns_.clear();
patterns_.push_back(
LabelPattern(LabelPattern::RECURSIVE_DIRECTORY, SourceDir(),
std::string(), Label()));
}
void Visibility::SetPrivate(const SourceDir& current_dir) {
patterns_.clear();
patterns_.push_back(
LabelPattern(LabelPattern::DIRECTORY, current_dir, std::string(),
Label()));
}
bool Visibility::CanSeeMe(const Label& label) const {
for (const auto& pattern : patterns_) {
if (pattern.Matches(label))
return true;
}
return false;
}
std::string Visibility::Describe(int indent, bool include_brackets) const {
std::string outer_indent_string(indent, ' ');
if (patterns_.empty())
return outer_indent_string + "[] (no visibility)\n";
std::string result;
std::string inner_indent_string = outer_indent_string;
if (include_brackets) {
result += outer_indent_string + "[\n";
// Indent the insides more if brackets are requested.
inner_indent_string += " ";
}
for (const auto& pattern : patterns_)
result += inner_indent_string + pattern.Describe() + "\n";
if (include_brackets)
result += outer_indent_string + "]\n";
return result;
}
// static
bool Visibility::CheckItemVisibility(const Item* from,
const Item* to,
Err* err) {
if (!to->visibility().CanSeeMe(from->label())) {
std::string to_label = to->label().GetUserVisibleName(false);
*err = Err(from->defined_from(), "Dependency not allowed.",
"The item " + from->label().GetUserVisibleName(false) + "\n"
"can not depend on " + to_label + "\n"
"because it is not in " + to_label + "'s visibility list: " +
to->visibility().Describe(0, true));
return false;
}
return true;
}
// static
bool Visibility::FillItemVisibility(Item* item, Scope* scope, Err* err) {
const Value* vis_value = scope->GetValue(variables::kVisibility, true);
if (vis_value)
item->visibility().Set(scope->GetSourceDir(), *vis_value, err);
else // Default to public.
item->visibility().SetPublic();
return !err->has_error();
}
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