mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 13:52:43 +00:00
d8faafef14
You can now watch the clipboard for changes and run a command each time the clipboard contents change like this: $ paste --watch some command here The command will be spawned each time the clipboard contents change. It can read the clipboard contents from its stdin, and CLIPBOARD_STATE environment variable will be set to "data" if there is data to be read, or to "nil"/"clear" if the clipboard has been cleared.
108 lines
3 KiB
C++
108 lines
3 KiB
C++
/*
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* Copyright (c) 2019-2021, Sergey Bugaev <bugaevc@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Format.h>
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#include <AK/String.h>
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#include <LibCore/ArgsParser.h>
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#include <LibGUI/Application.h>
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#include <LibGUI/Clipboard.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/wait.h>
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#include <unistd.h>
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static void spawn_command(const Vector<const char*>& command, const ByteBuffer& data, const char* state)
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{
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int pipefd[2];
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if (pipe(pipefd) < 0) {
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perror("pipe");
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return;
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}
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pid_t pid = fork();
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if (pid < 0) {
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perror("fork");
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return;
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} else if (pid == 0) {
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// We're the child.
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dup2(pipefd[0], 0);
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close(pipefd[0]);
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close(pipefd[1]);
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setenv("CLIPBOARD_STATE", state, true);
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execvp(command[0], const_cast<char**>(command.data()));
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perror("exec");
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exit(1);
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}
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// We're the parent.
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close(pipefd[0]);
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FILE* f = fdopen(pipefd[1], "w");
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fwrite(data.data(), data.size(), 1, f);
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if (ferror(f))
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warnln("failed to write data to the pipe: {}", strerror(ferror(f)));
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fclose(f);
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if (wait(nullptr) < 0)
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perror("wait");
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}
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int main(int argc, char* argv[])
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{
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bool print_type = false;
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bool no_newline = false;
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bool watch = false;
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Vector<const char*> watch_command;
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Core::ArgsParser args_parser;
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args_parser.set_general_help("Paste from the clipboard to stdout.");
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args_parser.add_option(print_type, "Display the copied type", "print-type", 0);
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args_parser.add_option(no_newline, "Do not append a newline", "no-newline", 'n');
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args_parser.add_option(watch, "Run a command when clipboard data changes", "watch", 'w');
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args_parser.add_positional_argument(watch_command, "Command to run in watch mode", "command", Core::ArgsParser::Required::No);
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args_parser.parse(argc, argv);
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auto app = GUI::Application::construct(argc, argv);
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auto& clipboard = GUI::Clipboard::the();
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if (watch) {
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watch_command.append(nullptr);
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clipboard.on_change = [&](const String&) {
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// Technically there's a race here...
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auto data_and_type = clipboard.data_and_type();
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if (data_and_type.mime_type.is_null()) {
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spawn_command(watch_command, {}, "clear");
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} else {
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spawn_command(watch_command, data_and_type.data, "data");
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}
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};
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// Trigger it the first time immediately.
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clipboard.on_change({});
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return app->exec();
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}
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auto data_and_type = clipboard.data_and_type();
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if (data_and_type.mime_type.is_null()) {
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warnln("Nothing copied");
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return 1;
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}
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if (!print_type) {
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out("{}", StringView(data_and_type.data));
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// Append a newline to text contents, unless the caller says otherwise.
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if (data_and_type.mime_type.starts_with("text/") && !no_newline)
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outln();
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} else {
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outln("{}", data_and_type.mime_type);
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}
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return 0;
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}
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