================ @@ -0,0 +1,161 @@ +//===-- Statusline.cpp ---------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "lldb/Core/Statusline.h" +#include "lldb/Core/Debugger.h" +#include "lldb/Core/FormatEntity.h" +#include "lldb/Host/ThreadLauncher.h" +#include "lldb/Interpreter/CommandInterpreter.h" +#include "lldb/Symbol/SymbolContext.h" +#include "lldb/Target/StackFrame.h" +#include "lldb/Utility/AnsiTerminal.h" +#include "lldb/Utility/LLDBLog.h" +#include "lldb/Utility/Log.h" +#include "lldb/Utility/StreamString.h" +#include "llvm/Support/Locale.h" + +#include <sys/ioctl.h> +#include <termios.h> + +#define ESCAPE "\x1b" +#define ANSI_SAVE_CURSOR ESCAPE "7" +#define ANSI_RESTORE_CURSOR ESCAPE "8" +#define ANSI_CLEAR_BELOW ESCAPE "[J" +#define ANSI_CLEAR_LINE "\r\x1B[2K" +#define ANSI_SET_SCROLL_ROWS ESCAPE "[0;%ur" +#define ANSI_TO_START_OF_ROW ESCAPE "[%u;0f" +#define ANSI_UP_ROWS ESCAPE "[%dA" +#define ANSI_DOWN_ROWS ESCAPE "[%dB" +#define ANSI_FORWARD_COLS ESCAPE "\033[%dC" +#define ANSI_BACKWARD_COLS ESCAPE "\033[%dD" + +using namespace lldb; +using namespace lldb_private; + +static size_t ColumnWidth(llvm::StringRef str) { + std::string stripped = ansi::StripAnsiTerminalCodes(str); + return llvm::sys::locale::columnWidth(stripped); +} + +Statusline::Statusline(Debugger &debugger) : m_debugger(debugger) {} + +Statusline::~Statusline() { Disable(); } + +bool Statusline::IsSupported() const { + File &file = m_debugger.GetOutputFile(); + return file.GetIsInteractive() && file.GetIsTerminalWithColors(); +} + +void Statusline::Enable() { + if (!IsSupported()) + return; + + UpdateTerminalProperties(); + + // Reduce the scroll window to make space for the status bar below. + SetScrollWindow(m_terminal_height - 1); + + // Draw the statusline. + Update(); +} + +void Statusline::Disable() { + UpdateTerminalProperties(); + // Clear the previous status bar if any. + Clear(); + // Extend the scroll window to cover the status bar. + SetScrollWindow(m_terminal_height); +} + +void Statusline::Draw(llvm::StringRef str) { + UpdateTerminalProperties(); + + const size_t ellipsis = 3; + const size_t column_width = ColumnWidth(str); + + if (column_width + ellipsis >= m_terminal_width) + str = str.substr(0, m_terminal_width - ellipsis); + + StreamFile &out = m_debugger.GetOutputStream(); + out << ANSI_SAVE_CURSOR; + out.Printf(ANSI_TO_START_OF_ROW, static_cast<unsigned>(m_terminal_height)); + out << ANSI_CLEAR_LINE; + out << str; + out << std::string(m_terminal_width - column_width, ' '); + out << ansi::FormatAnsiTerminalCodes(k_ansi_suffix); + out << ANSI_RESTORE_CURSOR; +} + +void Statusline::Reset() { + StreamFile &out = m_debugger.GetOutputStream(); + out << ANSI_SAVE_CURSOR; + out.Printf(ANSI_TO_START_OF_ROW, static_cast<unsigned>(m_terminal_height)); + out << ANSI_CLEAR_LINE; + out << ANSI_RESTORE_CURSOR; +} + +void Statusline::Clear() { Draw(""); } + +void Statusline::UpdateTerminalProperties() { + if (m_terminal_size_has_changed == 0) + return; + + // Clear the previous statusline. + Reset(); + + // Purposely ignore the terminal settings. If the setting doesn't match + // reality and we draw the status bar over existing text, we have no way to + // recover. + struct winsize window_size; + if ((isatty(STDIN_FILENO) != 0) && + ::ioctl(STDIN_FILENO, TIOCGWINSZ, &window_size) == 0) { ---------------- labath wrote:
- this won't build on windows (it only works in the lldb driver because of a very ugly hack in `driver/Platform.cpp`) - Shouldn't this be getting file/fd from the debuggers stdin? - actually maybe stdout, since stdin might be redirected? - I'm not convinced this is the right thing to do anyway. What's this trying to fix/work around? https://github.com/llvm/llvm-project/pull/121860 _______________________________________________ lldb-commits mailing list lldb-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits
