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// Copyright 2020 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <cstring>
#include "src/diagnostic/printer.h"
#define WIN32_LEAN_AND_MEAN 1
#include <Windows.h>
namespace tint {
namespace diag {
namespace {
struct ConsoleInfo {
HANDLE handle = INVALID_HANDLE_VALUE;
WORD default_attributes = 0;
operator bool() const { return handle != INVALID_HANDLE_VALUE; }
};
ConsoleInfo console_info(FILE* file) {
if (file == nullptr) {
return {};
}
ConsoleInfo console{};
if (file == stdout) {
console.handle = GetStdHandle(STD_OUTPUT_HANDLE);
} else if (file == stderr) {
console.handle = GetStdHandle(STD_ERROR_HANDLE);
} else {
return {};
}
CONSOLE_SCREEN_BUFFER_INFO info{};
if (GetConsoleScreenBufferInfo(console.handle, &info) == 0) {
return {};
}
console.default_attributes = info.wAttributes;
return console;
}
class PrinterWindows : public Printer {
public:
PrinterWindows(FILE* f, bool use_colors)
: file(f), console(console_info(use_colors ? f : nullptr)) {}
void write(const std::string& str, const Style& style) override {
write_color(style.color, style.bold);
fwrite(str.data(), 1, str.size(), file);
write_color(Color::kDefault, false);
}
private:
WORD attributes(Color color, bool bold) {
switch (color) {
case Color::kDefault:
return console.default_attributes;
case Color::kBlack:
return 0;
case Color::kRed:
return FOREGROUND_RED | (bold ? FOREGROUND_INTENSITY : 0);
case Color::kGreen:
return FOREGROUND_GREEN | (bold ? FOREGROUND_INTENSITY : 0);
case Color::kYellow:
return FOREGROUND_RED | FOREGROUND_GREEN |
(bold ? FOREGROUND_INTENSITY : 0);
case Color::kBlue:
return FOREGROUND_BLUE | (bold ? FOREGROUND_INTENSITY : 0);
case Color::kMagenta:
return FOREGROUND_RED | FOREGROUND_BLUE |
(bold ? FOREGROUND_INTENSITY : 0);
case Color::kCyan:
return FOREGROUND_GREEN | FOREGROUND_BLUE |
(bold ? FOREGROUND_INTENSITY : 0);
case Color::kWhite:
return FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE |
(bold ? FOREGROUND_INTENSITY : 0);
}
return 0; // unreachable
}
void write_color(Color color, bool bold) {
if (console) {
SetConsoleTextAttribute(console.handle, attributes(color, bold));
fflush(file);
}
}
FILE* const file;
ConsoleInfo const console;
};
} // namespace
std::unique_ptr<Printer> Printer::create(FILE* out, bool use_colors) {
return std::make_unique<PrinterWindows>(out, use_colors);
}
} // namespace diag
} // namespace tint