================ @@ -0,0 +1,171 @@ +//===-- 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/StreamFile.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" + +#define ESCAPE "\x1b" +#define ANSI_NORMAL ESCAPE "[0m" +#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) { Enable(); } + +Statusline::~Statusline() { Disable(); } + +void Statusline::TerminalSizeChanged() { + m_terminal_size_has_changed = 1; + + // This definitely isn't signal safe, but the best we can do, until we + // have proper signal-catching thread. + Redraw(/*update=*/false); +} + +void Statusline::Enable() { + UpdateTerminalProperties(); + + // Reduce the scroll window to make space for the status bar below. + SetScrollWindow(m_terminal_height - 1); + + // Draw the statusline. + Redraw(); +} + +void Statusline::Disable() { + UpdateTerminalProperties(); + + // Extend the scroll window to cover the status bar. + SetScrollWindow(m_terminal_height); +} + +void Statusline::Draw(std::string str) { + static constexpr const size_t g_ellipsis = 3; + + UpdateTerminalProperties(); + + m_last_str = str; + + size_t column_width = ColumnWidth(str); + + if (column_width + g_ellipsis >= m_terminal_width) { + // FIXME: If there are hidden characters (e.g. UTF-8, ANSI escape + // characters), this will strip the string more than necessary. Ideally we + // want to strip until column_width == m_terminal_width. + str = str.substr(0, m_terminal_width); + str.replace(m_terminal_width - g_ellipsis, g_ellipsis, "..."); + column_width = ColumnWidth(str); + } + + if (lldb::LockableStreamFileSP stream_sp = m_debugger.GetOutputStreamSP()) { ---------------- DavidSpickett wrote:
If we don't have an output steam sp here, was there any point doing the work above? 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
