| //===-- Editline.cpp --------------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include <iomanip> |
| #include <iostream> |
| #include <limits.h> |
| |
| #include "lldb/Host/Editline.h" |
| #include "lldb/Host/ConnectionFileDescriptor.h" |
| #include "lldb/Core/Error.h" |
| #include "lldb/Core/StringList.h" |
| #include "lldb/Core/StreamString.h" |
| #include "lldb/Host/FileSpec.h" |
| #include "lldb/Host/FileSystem.h" |
| #include "lldb/Host/Host.h" |
| #include "lldb/Host/Mutex.h" |
| #include "lldb/Utility/LLDBAssert.h" |
| |
| using namespace lldb_private; |
| using namespace lldb_private::line_editor; |
| |
| // Workaround for what looks like an OS X-specific issue, but other platforms |
| // may benefit from something similar if issues arise. The libedit library |
| // doesn't explicitly initialize the curses termcap library, which it gets away |
| // with until TERM is set to VT100 where it stumbles over an implementation |
| // assumption that may not exist on other platforms. The setupterm() function |
| // would normally require headers that don't work gracefully in this context, so |
| // the function declaraction has been hoisted here. |
| #if defined(__APPLE__) |
| extern "C" { |
| int setupterm(char *term, int fildes, int *errret); |
| } |
| #define USE_SETUPTERM_WORKAROUND |
| #endif |
| |
| // Editline uses careful cursor management to achieve the illusion of editing a multi-line block of text |
| // with a single line editor. Preserving this illusion requires fairly careful management of cursor |
| // state. Read and understand the relationship between DisplayInput(), MoveCursor(), SetCurrentLine(), |
| // and SaveEditedLine() before making changes. |
| |
| #define ESCAPE "\x1b" |
| #define ANSI_FAINT ESCAPE "[2m" |
| #define ANSI_UNFAINT ESCAPE "[22m" |
| #define ANSI_CLEAR_BELOW ESCAPE "[J" |
| #define ANSI_CLEAR_RIGHT ESCAPE "[K" |
| #define ANSI_SET_COLUMN_N ESCAPE "[%dG" |
| #define ANSI_UP_N_ROWS ESCAPE "[%dA" |
| #define ANSI_DOWN_N_ROWS ESCAPE "[%dB" |
| |
| #if LLDB_EDITLINE_USE_WCHAR |
| |
| #define EditLineConstString(str) L##str |
| #define EditLineStringFormatSpec "%ls" |
| |
| #else |
| |
| #define EditLineConstString(str) str |
| #define EditLineStringFormatSpec "%s" |
| |
| // use #defines so wide version functions and structs will resolve to old versions |
| // for case of libedit not built with wide char support |
| #define history_w history |
| #define history_winit history_init |
| #define history_wend history_end |
| #define HistoryW History |
| #define HistEventW HistEvent |
| #define LineInfoW LineInfo |
| |
| #define el_wgets el_gets |
| #define el_wgetc el_getc |
| #define el_wpush el_push |
| #define el_wparse el_parse |
| #define el_wset el_set |
| #define el_wget el_get |
| #define el_wline el_line |
| #define el_winsertstr el_insertstr |
| #define el_wdeletestr el_deletestr |
| |
| #endif // #if LLDB_EDITLINE_USE_WCHAR |
| |
| bool |
| IsOnlySpaces (const EditLineStringType & content) |
| { |
| for (wchar_t ch : content) |
| { |
| if (ch != EditLineCharType(' ')) |
| return false; |
| } |
| return true; |
| } |
| |
| EditLineStringType |
| CombineLines (const std::vector<EditLineStringType> & lines) |
| { |
| EditLineStringStreamType combined_stream; |
| for (EditLineStringType line : lines) |
| { |
| combined_stream << line.c_str() << "\n"; |
| } |
| return combined_stream.str(); |
| } |
| |
| std::vector<EditLineStringType> |
| SplitLines (const EditLineStringType & input) |
| { |
| std::vector<EditLineStringType> result; |
| size_t start = 0; |
| while (start < input.length()) |
| { |
| size_t end = input.find ('\n', start); |
| if (end == std::string::npos) |
| { |
| result.insert (result.end(), input.substr (start)); |
| break; |
| } |
| result.insert (result.end(), input.substr (start, end - start)); |
| start = end + 1; |
| } |
| return result; |
| } |
| |
| EditLineStringType |
| FixIndentation (const EditLineStringType & line, int indent_correction) |
| { |
| if (indent_correction == 0) |
| return line; |
| if (indent_correction < 0) |
| return line.substr (-indent_correction); |
| return EditLineStringType (indent_correction, EditLineCharType(' ')) + line; |
| } |
| |
| int |
| GetIndentation (const EditLineStringType & line) |
| { |
| int space_count = 0; |
| for (EditLineCharType ch : line) |
| { |
| if (ch != EditLineCharType(' ')) |
| break; |
| ++space_count; |
| } |
| return space_count; |
| } |
| |
| bool |
| IsInputPending (FILE * file) |
| { |
| // FIXME: This will be broken on Windows if we ever re-enable Editline. You can't use select |
| // on something that isn't a socket. This will have to be re-written to not use a FILE*, but |
| // instead use some kind of yet-to-be-created abstraction that select-like functionality on |
| // non-socket objects. |
| const int fd = fileno (file); |
| fd_set fds; |
| FD_ZERO (&fds); |
| FD_SET (fd, &fds); |
| timeval timeout = { 0, 0 }; |
| return select (fd + 1, &fds, NULL, NULL, &timeout); |
| } |
| |
| namespace lldb_private |
| { |
| namespace line_editor |
| { |
| typedef std::weak_ptr<EditlineHistory> EditlineHistoryWP; |
| |
| // EditlineHistory objects are sometimes shared between multiple |
| // Editline instances with the same program name. |
| |
| class EditlineHistory |
| { |
| private: |
| // Use static GetHistory() function to get a EditlineHistorySP to one of these objects |
| EditlineHistory (const std::string &prefix, uint32_t size, bool unique_entries) : |
| m_history (NULL), |
| m_event (), |
| m_prefix (prefix), |
| m_path () |
| { |
| m_history = history_winit(); |
| history_w (m_history, &m_event, H_SETSIZE, size); |
| if (unique_entries) |
| history_w (m_history, &m_event, H_SETUNIQUE, 1); |
| } |
| |
| const char * |
| GetHistoryFilePath() |
| { |
| if (m_path.empty() && m_history && !m_prefix.empty()) |
| { |
| FileSpec parent_path{"~/.lldb", true}; |
| char history_path[PATH_MAX]; |
| if (FileSystem::MakeDirectory(parent_path, lldb::eFilePermissionsDirectoryDefault).Success()) |
| { |
| snprintf (history_path, sizeof (history_path), "~/.lldb/%s-history", m_prefix.c_str()); |
| } |
| else |
| { |
| snprintf (history_path, sizeof (history_path), "~/%s-widehistory", m_prefix.c_str()); |
| } |
| m_path = std::move (FileSpec (history_path, true).GetPath()); |
| } |
| if (m_path.empty()) |
| return NULL; |
| return m_path.c_str(); |
| } |
| |
| public: |
| |
| ~EditlineHistory() |
| { |
| Save(); |
| |
| if (m_history) |
| { |
| history_wend (m_history); |
| m_history = NULL; |
| } |
| } |
| |
| static EditlineHistorySP |
| GetHistory (const std::string &prefix) |
| { |
| typedef std::map<std::string, EditlineHistoryWP> WeakHistoryMap; |
| static Mutex g_mutex (Mutex::eMutexTypeRecursive); |
| static WeakHistoryMap g_weak_map; |
| Mutex::Locker locker (g_mutex); |
| WeakHistoryMap::const_iterator pos = g_weak_map.find (prefix); |
| EditlineHistorySP history_sp; |
| if (pos != g_weak_map.end()) |
| { |
| history_sp = pos->second.lock(); |
| if (history_sp) |
| return history_sp; |
| g_weak_map.erase (pos); |
| } |
| history_sp.reset (new EditlineHistory (prefix, 800, true)); |
| g_weak_map[prefix] = history_sp; |
| return history_sp; |
| } |
| |
| bool IsValid() const |
| { |
| return m_history != NULL; |
| } |
| |
| HistoryW * |
| GetHistoryPtr () |
| { |
| return m_history; |
| } |
| |
| void |
| Enter (const EditLineCharType *line_cstr) |
| { |
| if (m_history) |
| history_w (m_history, &m_event, H_ENTER, line_cstr); |
| } |
| |
| bool |
| Load () |
| { |
| if (m_history) |
| { |
| const char *path = GetHistoryFilePath(); |
| if (path) |
| { |
| history_w (m_history, &m_event, H_LOAD, path); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| bool |
| Save () |
| { |
| if (m_history) |
| { |
| const char *path = GetHistoryFilePath(); |
| if (path) |
| { |
| history_w (m_history, &m_event, H_SAVE, path); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| protected: |
| HistoryW * m_history; // The history object |
| HistEventW m_event; // The history event needed to contain all history events |
| std::string m_prefix; // The prefix name (usually the editline program name) to use when loading/saving history |
| std::string m_path; // Path to the history file |
| }; |
| } |
| } |
| |
| //------------------------------------------------------------------ |
| // Editline private methods |
| //------------------------------------------------------------------ |
| |
| void |
| Editline::SetBaseLineNumber (int line_number) |
| { |
| std::stringstream line_number_stream; |
| line_number_stream << line_number; |
| m_base_line_number = line_number; |
| m_line_number_digits = std::max (3, (int)line_number_stream.str().length() + 1); |
| } |
| |
| std::string |
| Editline::PromptForIndex (int line_index) |
| { |
| bool use_line_numbers = m_multiline_enabled && m_base_line_number > 0; |
| std::string prompt = m_set_prompt; |
| if (use_line_numbers && prompt.length() == 0) |
| { |
| prompt = ": "; |
| } |
| std::string continuation_prompt = prompt; |
| if (m_set_continuation_prompt.length() > 0) |
| { |
| continuation_prompt = m_set_continuation_prompt; |
| |
| // Ensure that both prompts are the same length through space padding |
| while (continuation_prompt.length() < prompt.length()) |
| { |
| continuation_prompt += ' '; |
| } |
| while (prompt.length() < continuation_prompt.length()) |
| { |
| prompt += ' '; |
| } |
| } |
| |
| if (use_line_numbers) |
| { |
| StreamString prompt_stream; |
| prompt_stream.Printf("%*d%s", m_line_number_digits, m_base_line_number + line_index, |
| (line_index == 0) ? prompt.c_str() : continuation_prompt.c_str()); |
| return std::move (prompt_stream.GetString()); |
| } |
| return (line_index == 0) ? prompt : continuation_prompt; |
| } |
| |
| void |
| Editline::SetCurrentLine (int line_index) |
| { |
| m_current_line_index = line_index; |
| m_current_prompt = PromptForIndex (line_index); |
| } |
| |
| int |
| Editline::GetPromptWidth() |
| { |
| return (int)PromptForIndex (0).length(); |
| } |
| |
| bool |
| Editline::IsEmacs() |
| { |
| const char * editor; |
| el_get (m_editline, EL_EDITOR, &editor); |
| return editor[0] == 'e'; |
| } |
| |
| bool |
| Editline::IsOnlySpaces() |
| { |
| const LineInfoW * info = el_wline (m_editline); |
| for (const EditLineCharType * character = info->buffer; character < info->lastchar; character++) |
| { |
| if (*character != ' ') |
| return false; |
| } |
| return true; |
| } |
| |
| int |
| Editline::GetLineIndexForLocation (CursorLocation location, int cursor_row) |
| { |
| int line = 0; |
| if (location == CursorLocation::EditingPrompt || location == CursorLocation::BlockEnd || |
| location == CursorLocation::EditingCursor) |
| { |
| for (unsigned index = 0; index < m_current_line_index; index++) |
| { |
| line += CountRowsForLine (m_input_lines[index]); |
| } |
| if (location == CursorLocation::EditingCursor) |
| { |
| line += cursor_row; |
| } |
| else if (location == CursorLocation::BlockEnd) |
| { |
| for (unsigned index = m_current_line_index; index < m_input_lines.size(); index++) |
| { |
| line += CountRowsForLine (m_input_lines[index]); |
| } |
| --line; |
| } |
| } |
| return line; |
| } |
| |
| void |
| Editline::MoveCursor (CursorLocation from, CursorLocation to) |
| { |
| const LineInfoW * info = el_wline (m_editline); |
| int editline_cursor_position = (int)((info->cursor - info->buffer) + GetPromptWidth()); |
| int editline_cursor_row = editline_cursor_position / m_terminal_width; |
| |
| // Determine relative starting and ending lines |
| int fromLine = GetLineIndexForLocation (from, editline_cursor_row); |
| int toLine = GetLineIndexForLocation (to, editline_cursor_row); |
| if (toLine != fromLine) |
| { |
| fprintf (m_output_file, (toLine > fromLine) ? ANSI_DOWN_N_ROWS : ANSI_UP_N_ROWS, std::abs (toLine - fromLine)); |
| } |
| |
| // Determine target column |
| int toColumn = 1; |
| if (to == CursorLocation::EditingCursor) |
| { |
| toColumn = editline_cursor_position - (editline_cursor_row * m_terminal_width) + 1; |
| } |
| else if (to == CursorLocation::BlockEnd) |
| { |
| toColumn = ((m_input_lines[m_input_lines.size() - 1].length() + GetPromptWidth()) % 80) + 1; |
| } |
| fprintf (m_output_file, ANSI_SET_COLUMN_N, toColumn); |
| } |
| |
| void |
| Editline::DisplayInput (int firstIndex) |
| { |
| fprintf (m_output_file, ANSI_SET_COLUMN_N ANSI_CLEAR_BELOW, 1); |
| int line_count = (int)m_input_lines.size(); |
| const char *faint = m_color_prompts ? ANSI_FAINT : ""; |
| const char *unfaint = m_color_prompts ? ANSI_UNFAINT : ""; |
| |
| for (int index = firstIndex; index < line_count; index++) |
| { |
| fprintf (m_output_file, "%s" "%s" "%s" EditLineStringFormatSpec " ", |
| faint, |
| PromptForIndex (index).c_str(), |
| unfaint, |
| m_input_lines[index].c_str()); |
| if (index < line_count - 1) |
| fprintf (m_output_file, "\n"); |
| } |
| } |
| |
| |
| int |
| Editline::CountRowsForLine (const EditLineStringType & content) |
| { |
| auto prompt = PromptForIndex (0); // Prompt width is constant during an edit session |
| int line_length = (int)(content.length() + prompt.length()); |
| return (line_length / m_terminal_width) + 1; |
| } |
| |
| void |
| Editline::SaveEditedLine() |
| { |
| const LineInfoW * info = el_wline (m_editline); |
| m_input_lines[m_current_line_index] = EditLineStringType (info->buffer, info->lastchar - info->buffer); |
| } |
| |
| StringList |
| Editline::GetInputAsStringList(int line_count) |
| { |
| StringList lines; |
| for (EditLineStringType line : m_input_lines) |
| { |
| if (line_count == 0) |
| break; |
| #if LLDB_EDITLINE_USE_WCHAR |
| lines.AppendString (m_utf8conv.to_bytes (line)); |
| #else |
| lines.AppendString(line); |
| #endif |
| --line_count; |
| } |
| return lines; |
| } |
| |
| unsigned char |
| Editline::RecallHistory (bool earlier) |
| { |
| if (!m_history_sp || !m_history_sp->IsValid()) |
| return CC_ERROR; |
| |
| HistoryW * pHistory = m_history_sp->GetHistoryPtr(); |
| HistEventW history_event; |
| std::vector<EditLineStringType> new_input_lines; |
| |
| // Treat moving from the "live" entry differently |
| if (!m_in_history) |
| { |
| if (earlier == false) |
| return CC_ERROR; // Can't go newer than the "live" entry |
| if (history_w (pHistory, &history_event, H_FIRST) == -1) |
| return CC_ERROR; |
| |
| // Save any edits to the "live" entry in case we return by moving forward in history |
| // (it would be more bash-like to save over any current entry, but libedit doesn't |
| // offer the ability to add entries anywhere except the end.) |
| SaveEditedLine(); |
| m_live_history_lines = m_input_lines; |
| m_in_history = true; |
| } |
| else |
| { |
| if (history_w (pHistory, &history_event, earlier ? H_NEXT : H_PREV) == -1) |
| { |
| // Can't move earlier than the earliest entry |
| if (earlier) |
| return CC_ERROR; |
| |
| // ... but moving to newer than the newest yields the "live" entry |
| new_input_lines = m_live_history_lines; |
| m_in_history = false; |
| } |
| } |
| |
| // If we're pulling the lines from history, split them apart |
| if (m_in_history) |
| new_input_lines = SplitLines (history_event.str); |
| |
| // Erase the current edit session and replace it with a new one |
| MoveCursor (CursorLocation::EditingCursor, CursorLocation::BlockStart); |
| m_input_lines = new_input_lines; |
| DisplayInput(); |
| |
| // Prepare to edit the last line when moving to previous entry, or the first line |
| // when moving to next entry |
| SetCurrentLine (m_current_line_index = earlier ? (int)m_input_lines.size() - 1 : 0); |
| MoveCursor (CursorLocation::BlockEnd, CursorLocation::EditingPrompt); |
| return CC_NEWLINE; |
| } |
| |
| int |
| Editline::GetCharacter (EditLineCharType * c) |
| { |
| const LineInfoW * info = el_wline (m_editline); |
| |
| // Paint a faint version of the desired prompt over the version libedit draws |
| // (will only be requested if colors are supported) |
| if (m_needs_prompt_repaint) |
| { |
| MoveCursor (CursorLocation::EditingCursor, CursorLocation::EditingPrompt); |
| fprintf (m_output_file, "%s" "%s" "%s", ANSI_FAINT, Prompt(), ANSI_UNFAINT); |
| MoveCursor (CursorLocation::EditingPrompt, CursorLocation::EditingCursor); |
| m_needs_prompt_repaint = false; |
| } |
| |
| if (m_multiline_enabled) |
| { |
| // Detect when the number of rows used for this input line changes due to an edit |
| int lineLength = (int)((info->lastchar - info->buffer) + GetPromptWidth()); |
| int new_line_rows = (lineLength / m_terminal_width) + 1; |
| if (m_current_line_rows != -1 && new_line_rows != m_current_line_rows) |
| { |
| // Respond by repainting the current state from this line on |
| MoveCursor (CursorLocation::EditingCursor, CursorLocation::EditingPrompt); |
| SaveEditedLine(); |
| DisplayInput (m_current_line_index); |
| MoveCursor (CursorLocation::BlockEnd, CursorLocation::EditingCursor); |
| } |
| m_current_line_rows = new_line_rows; |
| } |
| |
| // Read an actual character |
| while (true) |
| { |
| lldb::ConnectionStatus status = lldb::eConnectionStatusSuccess; |
| char ch = 0; |
| |
| // This mutex is locked by our caller (GetLine). Unlock it while we read a character |
| // (blocking operation), so we do not hold the mutex indefinitely. This gives a chance |
| // for someone to interrupt us. After Read returns, immediately lock the mutex again and |
| // check if we were interrupted. |
| m_output_mutex.Unlock(); |
| int read_count = m_input_connection.Read(&ch, 1, UINT32_MAX, status, NULL); |
| m_output_mutex.Lock(); |
| if (m_editor_status == EditorStatus::Interrupted) |
| { |
| while (read_count > 0 && status == lldb::eConnectionStatusSuccess) |
| read_count = m_input_connection.Read(&ch, 1, UINT32_MAX, status, NULL); |
| lldbassert(status == lldb::eConnectionStatusInterrupted); |
| return 0; |
| } |
| |
| if (read_count) |
| { |
| #if LLDB_EDITLINE_USE_WCHAR |
| // After the initial interruptible read, this is guaranteed not to block |
| ungetc (ch, m_input_file); |
| *c = fgetwc (m_input_file); |
| if (*c != WEOF) |
| return 1; |
| #else |
| *c = ch; |
| if(ch != (char)EOF) |
| return 1; |
| #endif |
| } |
| else |
| { |
| switch (status) |
| { |
| case lldb::eConnectionStatusSuccess: // Success |
| break; |
| |
| case lldb::eConnectionStatusInterrupted: |
| lldbassert(0 && "Interrupts should have been handled above."); |
| |
| case lldb::eConnectionStatusError: // Check GetError() for details |
| case lldb::eConnectionStatusTimedOut: // Request timed out |
| case lldb::eConnectionStatusEndOfFile: // End-of-file encountered |
| case lldb::eConnectionStatusNoConnection: // No connection |
| case lldb::eConnectionStatusLostConnection: // Lost connection while connected to a valid connection |
| m_editor_status = EditorStatus::EndOfInput; |
| return 0; |
| } |
| } |
| } |
| } |
| |
| const char * |
| Editline::Prompt() |
| { |
| if (m_color_prompts) |
| m_needs_prompt_repaint = true; |
| return m_current_prompt.c_str(); |
| } |
| |
| unsigned char |
| Editline::BreakLineCommand (int ch) |
| { |
| // Preserve any content beyond the cursor, truncate and save the current line |
| const LineInfoW * info = el_wline (m_editline); |
| auto current_line = EditLineStringType (info->buffer, info->cursor - info->buffer); |
| auto new_line_fragment = EditLineStringType (info->cursor, info->lastchar - info->cursor); |
| m_input_lines[m_current_line_index] = current_line; |
| |
| // Ignore whitespace-only extra fragments when breaking a line |
| if (::IsOnlySpaces (new_line_fragment)) |
| new_line_fragment = EditLineConstString(""); |
| |
| // Establish the new cursor position at the start of a line when inserting a line break |
| m_revert_cursor_index = 0; |
| |
| // Don't perform end of input detection or automatic formatting when pasting |
| if (!IsInputPending (m_input_file)) |
| { |
| // If this is the end of the last line, treat this as a potential exit |
| if (m_current_line_index == m_input_lines.size() - 1 && new_line_fragment.length() == 0) |
| { |
| bool end_of_input = true; |
| if (m_is_input_complete_callback) |
| { |
| SaveEditedLine(); |
| auto lines = GetInputAsStringList(); |
| end_of_input = m_is_input_complete_callback (this, lines, m_is_input_complete_callback_baton); |
| |
| // The completion test is allowed to change the input lines when complete |
| if (end_of_input) |
| { |
| m_input_lines.clear(); |
| for (unsigned index = 0; index < lines.GetSize(); index++) |
| { |
| #if LLDB_EDITLINE_USE_WCHAR |
| m_input_lines.insert (m_input_lines.end(), m_utf8conv.from_bytes (lines[index])); |
| #else |
| m_input_lines.insert (m_input_lines.end(), lines[index]); |
| #endif |
| } |
| } |
| } |
| if (end_of_input) |
| { |
| fprintf (m_output_file, "\n"); |
| m_editor_status = EditorStatus::Complete; |
| return CC_NEWLINE; |
| } |
| } |
| |
| // Apply smart indentation |
| if (m_fix_indentation_callback) |
| { |
| StringList lines = GetInputAsStringList (m_current_line_index + 1); |
| #if LLDB_EDITLINE_USE_WCHAR |
| lines.AppendString (m_utf8conv.to_bytes (new_line_fragment)); |
| #else |
| lines.AppendString (new_line_fragment); |
| #endif |
| |
| int indent_correction = m_fix_indentation_callback (this, lines, 0, m_fix_indentation_callback_baton); |
| new_line_fragment = FixIndentation(new_line_fragment, indent_correction); |
| m_revert_cursor_index = GetIndentation(new_line_fragment); |
| } |
| } |
| |
| // Insert the new line and repaint everything from the split line on down |
| m_input_lines.insert (m_input_lines.begin() + m_current_line_index + 1, new_line_fragment); |
| MoveCursor (CursorLocation::EditingCursor, CursorLocation::EditingPrompt); |
| DisplayInput (m_current_line_index); |
| |
| // Reposition the cursor to the right line and prepare to edit the new line |
| SetCurrentLine (m_current_line_index + 1); |
| MoveCursor (CursorLocation::BlockEnd, CursorLocation::EditingPrompt); |
| return CC_NEWLINE; |
| } |
| |
| unsigned char |
| Editline::DeleteNextCharCommand (int ch) |
| { |
| LineInfoW * info = const_cast<LineInfoW *>(el_wline (m_editline)); |
| |
| // Just delete the next character normally if possible |
| if (info->cursor < info->lastchar) |
| { |
| info->cursor++; |
| el_deletestr (m_editline, 1); |
| return CC_REFRESH; |
| } |
| |
| // Fail when at the end of the last line, except when ^D is pressed on |
| // the line is empty, in which case it is treated as EOF |
| if (m_current_line_index == m_input_lines.size() - 1) |
| { |
| if (ch == 4 && info->buffer == info->lastchar) |
| { |
| fprintf (m_output_file, "^D\n"); |
| m_editor_status = EditorStatus::EndOfInput; |
| return CC_EOF; |
| } |
| return CC_ERROR; |
| } |
| |
| // Prepare to combine this line with the one below |
| MoveCursor (CursorLocation::EditingCursor, CursorLocation::EditingPrompt); |
| |
| // Insert the next line of text at the cursor and restore the cursor position |
| const EditLineCharType * cursor = info->cursor; |
| el_winsertstr (m_editline, m_input_lines[m_current_line_index + 1].c_str()); |
| info->cursor = cursor; |
| SaveEditedLine(); |
| |
| // Delete the extra line |
| m_input_lines.erase (m_input_lines.begin() + m_current_line_index + 1); |
| |
| // Clear and repaint from this line on down |
| DisplayInput (m_current_line_index); |
| MoveCursor (CursorLocation::BlockEnd, CursorLocation::EditingCursor); |
| return CC_REFRESH; |
| } |
| |
| unsigned char |
| Editline::DeletePreviousCharCommand (int ch) |
| { |
| LineInfoW * info = const_cast<LineInfoW *>(el_wline (m_editline)); |
| |
| // Just delete the previous character normally when not at the start of a line |
| if (info->cursor > info->buffer) |
| { |
| el_deletestr (m_editline, 1); |
| return CC_REFRESH; |
| } |
| |
| // No prior line and no prior character? Let the user know |
| if (m_current_line_index == 0) |
| return CC_ERROR; |
| |
| // No prior character, but prior line? Combine with the line above |
| SaveEditedLine(); |
| SetCurrentLine (m_current_line_index - 1); |
| auto priorLine = m_input_lines[m_current_line_index]; |
| m_input_lines.erase (m_input_lines.begin() + m_current_line_index); |
| m_input_lines[m_current_line_index] = priorLine + m_input_lines[m_current_line_index]; |
| |
| // Repaint from the new line down |
| fprintf (m_output_file, ANSI_UP_N_ROWS ANSI_SET_COLUMN_N, CountRowsForLine (priorLine), 1); |
| DisplayInput (m_current_line_index); |
| |
| // Put the cursor back where libedit expects it to be before returning to editing |
| // by telling libedit about the newly inserted text |
| MoveCursor (CursorLocation::BlockEnd, CursorLocation::EditingPrompt); |
| el_winsertstr (m_editline, priorLine.c_str()); |
| return CC_REDISPLAY; |
| } |
| |
| unsigned char |
| Editline::PreviousLineCommand (int ch) |
| { |
| SaveEditedLine(); |
| |
| if (m_current_line_index == 0) { |
| return RecallHistory (true); |
| } |
| |
| // Start from a known location |
| MoveCursor (CursorLocation::EditingCursor, CursorLocation::EditingPrompt); |
| |
| // Treat moving up from a blank last line as a deletion of that line |
| if (m_current_line_index == m_input_lines.size() - 1 && IsOnlySpaces()) |
| { |
| m_input_lines.erase (m_input_lines.begin() + m_current_line_index); |
| fprintf (m_output_file, ANSI_CLEAR_BELOW); |
| } |
| |
| SetCurrentLine (m_current_line_index - 1); |
| fprintf (m_output_file, ANSI_UP_N_ROWS ANSI_SET_COLUMN_N, |
| CountRowsForLine (m_input_lines[m_current_line_index]), 1); |
| return CC_NEWLINE; |
| } |
| |
| unsigned char |
| Editline::NextLineCommand (int ch) |
| { |
| SaveEditedLine(); |
| |
| // Handle attempts to move down from the last line |
| if (m_current_line_index == m_input_lines.size() - 1) |
| { |
| // Don't add an extra line if the existing last line is blank, move through history instead |
| if (IsOnlySpaces()) |
| { |
| return RecallHistory (false); |
| } |
| |
| // Determine indentation for the new line |
| int indentation = 0; |
| if (m_fix_indentation_callback) |
| { |
| StringList lines = GetInputAsStringList(); |
| lines.AppendString(""); |
| indentation = m_fix_indentation_callback (this, lines, 0, m_fix_indentation_callback_baton); |
| } |
| m_input_lines.insert (m_input_lines.end(), EditLineStringType (indentation, EditLineCharType(' '))); |
| } |
| |
| // Move down past the current line using newlines to force scrolling if needed |
| SetCurrentLine (m_current_line_index + 1); |
| const LineInfoW * info = el_wline (m_editline); |
| int cursor_position = (int)((info->cursor - info->buffer) + GetPromptWidth()); |
| int cursor_row = cursor_position / m_terminal_width; |
| for (int line_count = 0; line_count < m_current_line_rows - cursor_row; line_count++) |
| { |
| fprintf (m_output_file, "\n"); |
| } |
| return CC_NEWLINE; |
| } |
| |
| unsigned char |
| Editline::FixIndentationCommand (int ch) |
| { |
| if (!m_fix_indentation_callback) |
| return CC_NORM; |
| |
| // Insert the character by hand prior to correction |
| EditLineCharType inserted[] = { (EditLineCharType)ch, 0 }; |
| el_winsertstr (m_editline, inserted); |
| SaveEditedLine(); |
| StringList lines = GetInputAsStringList (m_current_line_index + 1); |
| |
| // Determine the cursor position |
| LineInfoW * info = const_cast<LineInfoW *>(el_wline (m_editline)); |
| int cursor_position = info->cursor - info->buffer; |
| |
| int indent_correction = m_fix_indentation_callback (this, lines, cursor_position, m_fix_indentation_callback_baton); |
| |
| // Adjust the input buffer to correct indentation |
| if (indent_correction > 0) |
| { |
| info->cursor = info->buffer; |
| el_winsertstr (m_editline, EditLineStringType (indent_correction, EditLineCharType(' ')).c_str()); |
| } |
| else if (indent_correction < 0) |
| { |
| info->cursor = info->buffer - indent_correction; |
| el_wdeletestr (m_editline, -indent_correction); |
| } |
| info->cursor = info->buffer + cursor_position + indent_correction; |
| return CC_REFRESH; |
| } |
| |
| unsigned char |
| Editline::RevertLineCommand (int ch) |
| { |
| el_winsertstr (m_editline, m_input_lines[m_current_line_index].c_str()); |
| if (m_revert_cursor_index >= 0) |
| { |
| LineInfoW * info = const_cast<LineInfoW *>(el_wline (m_editline)); |
| info->cursor = info->buffer + m_revert_cursor_index; |
| if (info->cursor > info->lastchar) |
| { |
| info->cursor = info->lastchar; |
| } |
| m_revert_cursor_index = -1; |
| } |
| return CC_REFRESH; |
| } |
| |
| unsigned char |
| Editline::BufferStartCommand (int ch) |
| { |
| SaveEditedLine(); |
| MoveCursor (CursorLocation::EditingCursor, CursorLocation::BlockStart); |
| SetCurrentLine (0); |
| m_revert_cursor_index = 0; |
| return CC_NEWLINE; |
| } |
| |
| unsigned char |
| Editline::BufferEndCommand (int ch) |
| { |
| SaveEditedLine(); |
| MoveCursor (CursorLocation::EditingCursor, CursorLocation::BlockEnd); |
| SetCurrentLine ((int)m_input_lines.size() - 1); |
| MoveCursor (CursorLocation::BlockEnd, CursorLocation::EditingPrompt); |
| return CC_NEWLINE; |
| } |
| |
| unsigned char |
| Editline::TabCommand (int ch) |
| { |
| if (m_completion_callback == nullptr) |
| return CC_ERROR; |
| |
| const LineInfo *line_info = el_line (m_editline); |
| StringList completions; |
| int page_size = 40; |
| |
| const int num_completions = m_completion_callback (line_info->buffer, |
| line_info->cursor, |
| line_info->lastchar, |
| 0, // Don't skip any matches (start at match zero) |
| -1, // Get all the matches |
| completions, |
| m_completion_callback_baton); |
| |
| if (num_completions == 0) |
| return CC_ERROR; |
| // if (num_completions == -1) |
| // { |
| // el_insertstr (m_editline, m_completion_key); |
| // return CC_REDISPLAY; |
| // } |
| // else |
| if (num_completions == -2) |
| { |
| // Replace the entire line with the first string... |
| el_deletestr (m_editline, line_info->cursor - line_info->buffer); |
| el_insertstr (m_editline, completions.GetStringAtIndex (0)); |
| return CC_REDISPLAY; |
| } |
| |
| // If we get a longer match display that first. |
| const char *completion_str = completions.GetStringAtIndex (0); |
| if (completion_str != nullptr && *completion_str != '\0') |
| { |
| el_insertstr (m_editline, completion_str); |
| return CC_REDISPLAY; |
| } |
| |
| if (num_completions > 1) |
| { |
| int num_elements = num_completions + 1; |
| fprintf (m_output_file, "\n" ANSI_CLEAR_BELOW "Available completions:"); |
| if (num_completions < page_size) |
| { |
| for (int i = 1; i < num_elements; i++) |
| { |
| completion_str = completions.GetStringAtIndex (i); |
| fprintf (m_output_file, "\n\t%s", completion_str); |
| } |
| fprintf (m_output_file, "\n"); |
| } |
| else |
| { |
| int cur_pos = 1; |
| char reply; |
| int got_char; |
| while (cur_pos < num_elements) |
| { |
| int endpoint = cur_pos + page_size; |
| if (endpoint > num_elements) |
| endpoint = num_elements; |
| for (; cur_pos < endpoint; cur_pos++) |
| { |
| completion_str = completions.GetStringAtIndex (cur_pos); |
| fprintf (m_output_file, "\n\t%s", completion_str); |
| } |
| |
| if (cur_pos >= num_elements) |
| { |
| fprintf (m_output_file, "\n"); |
| break; |
| } |
| |
| fprintf (m_output_file, "\nMore (Y/n/a): "); |
| reply = 'n'; |
| got_char = el_getc(m_editline, &reply); |
| if (got_char == -1 || reply == 'n') |
| break; |
| if (reply == 'a') |
| page_size = num_elements - cur_pos; |
| } |
| } |
| DisplayInput(); |
| MoveCursor(CursorLocation::BlockEnd, CursorLocation::EditingCursor); |
| } |
| return CC_REDISPLAY; |
| } |
| |
| void |
| Editline::ConfigureEditor (bool multiline) |
| { |
| if (m_editline && m_multiline_enabled == multiline) |
| return; |
| m_multiline_enabled = multiline; |
| |
| if (m_editline) |
| { |
| // Disable edit mode to stop the terminal from flushing all input |
| // during the call to el_end() since we expect to have multiple editline |
| // instances in this program. |
| el_set (m_editline, EL_EDITMODE, 0); |
| el_end (m_editline); |
| } |
| |
| m_editline = el_init (m_editor_name.c_str(), m_input_file, m_output_file, m_error_file); |
| TerminalSizeChanged(); |
| |
| if (m_history_sp && m_history_sp->IsValid()) |
| { |
| m_history_sp->Load(); |
| el_wset (m_editline, EL_HIST, history, m_history_sp->GetHistoryPtr()); |
| } |
| el_set (m_editline, EL_CLIENTDATA, this); |
| el_set (m_editline, EL_SIGNAL, 0); |
| el_set (m_editline, EL_EDITOR, "emacs"); |
| el_set (m_editline, EL_PROMPT, (EditlinePromptCallbackType)([] (EditLine *editline) { |
| return Editline::InstanceFor (editline)->Prompt(); |
| })); |
| |
| el_wset (m_editline, EL_GETCFN, |
| (EditlineGetCharCallbackType)([] (EditLine * editline, EditLineCharType * c) { |
| return Editline::InstanceFor (editline)->GetCharacter (c); |
| })); |
| |
| // Commands used for multiline support, registered whether or not they're used |
| el_set (m_editline, EL_ADDFN, "lldb-break-line", "Insert a line break", |
| (EditlineCommandCallbackType)([] (EditLine * editline, int ch) { |
| return Editline::InstanceFor (editline)->BreakLineCommand (ch); |
| })); |
| el_set (m_editline, EL_ADDFN, "lldb-delete-next-char", "Delete next character", |
| (EditlineCommandCallbackType)([] (EditLine * editline, int ch) { |
| return Editline::InstanceFor (editline)->DeleteNextCharCommand (ch); |
| })); |
| el_set (m_editline, EL_ADDFN, "lldb-delete-previous-char", "Delete previous character", |
| (EditlineCommandCallbackType)([] (EditLine * editline, int ch) { |
| return Editline::InstanceFor (editline)->DeletePreviousCharCommand (ch); |
| })); |
| el_set (m_editline, EL_ADDFN, "lldb-previous-line", "Move to previous line", |
| (EditlineCommandCallbackType)([] (EditLine * editline, int ch) { |
| return Editline::InstanceFor (editline)->PreviousLineCommand (ch); |
| })); |
| el_set (m_editline, EL_ADDFN, "lldb-next-line", "Move to next line", |
| (EditlineCommandCallbackType)([] (EditLine * editline, int ch) { |
| return Editline::InstanceFor (editline)->NextLineCommand (ch); |
| })); |
| el_set (m_editline, EL_ADDFN, "lldb-buffer-start", "Move to start of buffer", |
| (EditlineCommandCallbackType)([] (EditLine * editline, int ch) { |
| return Editline::InstanceFor (editline)->BufferStartCommand (ch); |
| })); |
| el_set (m_editline, EL_ADDFN, "lldb-buffer-end", "Move to end of buffer", |
| (EditlineCommandCallbackType)([] (EditLine * editline, int ch) { |
| return Editline::InstanceFor (editline)->BufferEndCommand (ch); |
| })); |
| el_set (m_editline, EL_ADDFN, "lldb-fix-indentation", "Fix line indentation", |
| (EditlineCommandCallbackType)([] (EditLine * editline, int ch) { |
| return Editline::InstanceFor (editline)->FixIndentationCommand (ch); |
| })); |
| |
| // Register the complete callback under two names for compatibility with older clients using |
| // custom .editrc files (largely becuase libedit has a bad bug where if you have a bind command |
| // that tries to bind to a function name that doesn't exist, it can corrupt the heap and |
| // crash your process later.) |
| EditlineCommandCallbackType complete_callback = [] (EditLine * editline, int ch) { |
| return Editline::InstanceFor (editline)->TabCommand (ch); |
| }; |
| el_set (m_editline, EL_ADDFN, "lldb-complete", "Invoke completion", complete_callback); |
| el_set (m_editline, EL_ADDFN, "lldb_complete", "Invoke completion", complete_callback); |
| |
| // General bindings we don't mind being overridden |
| if (!multiline) { |
| el_set (m_editline, EL_BIND, "^r", "em-inc-search-prev", NULL); // Cycle through backwards search, entering string |
| } |
| el_set (m_editline, EL_BIND, "^w", "ed-delete-prev-word", NULL); // Delete previous word, behave like bash in emacs mode |
| el_set (m_editline, EL_BIND, "\t", "lldb-complete", NULL); // Bind TAB to auto complete |
| |
| // Allow user-specific customization prior to registering bindings we absolutely require |
| el_source (m_editline, NULL); |
| |
| // Register an internal binding that external developers shouldn't use |
| el_set (m_editline, EL_ADDFN, "lldb-revert-line", "Revert line to saved state", |
| (EditlineCommandCallbackType)([] (EditLine * editline, int ch) { |
| return Editline::InstanceFor (editline)->RevertLineCommand (ch); |
| })); |
| |
| // Register keys that perform auto-indent correction |
| if (m_fix_indentation_callback && m_fix_indentation_callback_chars) |
| { |
| char bind_key[2] = { 0, 0 }; |
| const char * indent_chars = m_fix_indentation_callback_chars; |
| while (*indent_chars) |
| { |
| bind_key[0] = *indent_chars; |
| el_set (m_editline, EL_BIND, bind_key, "lldb-fix-indentation", NULL); |
| ++indent_chars; |
| } |
| } |
| |
| // Multi-line editor bindings |
| if (multiline) |
| { |
| el_set (m_editline, EL_BIND, "\n", "lldb-break-line", NULL); |
| el_set (m_editline, EL_BIND, "\r", "lldb-break-line", NULL); |
| el_set (m_editline, EL_BIND, "^p", "lldb-previous-line", NULL); |
| el_set (m_editline, EL_BIND, "^n", "lldb-next-line", NULL); |
| el_set (m_editline, EL_BIND, "^?", "lldb-delete-previous-char", NULL); |
| el_set (m_editline, EL_BIND, "^d", "lldb-delete-next-char", NULL); |
| el_set (m_editline, EL_BIND, ESCAPE "[3~", "lldb-delete-next-char", NULL); |
| el_set (m_editline, EL_BIND, ESCAPE "[\\^", "lldb-revert-line", NULL); |
| |
| // Editor-specific bindings |
| if (IsEmacs()) |
| { |
| el_set (m_editline, EL_BIND, ESCAPE "<", "lldb-buffer-start", NULL); |
| el_set (m_editline, EL_BIND, ESCAPE ">", "lldb-buffer-end", NULL); |
| el_set (m_editline, EL_BIND, ESCAPE "[A", "lldb-previous-line", NULL); |
| el_set (m_editline, EL_BIND, ESCAPE "[B", "lldb-next-line", NULL); |
| } |
| else |
| { |
| el_set (m_editline, EL_BIND, "^H", "lldb-delete-previous-char", NULL); |
| |
| el_set (m_editline, EL_BIND, "-a", ESCAPE "[A", "lldb-previous-line", NULL); |
| el_set (m_editline, EL_BIND, "-a", ESCAPE "[B", "lldb-next-line", NULL); |
| el_set (m_editline, EL_BIND, "-a", "x", "lldb-delete-next-char", NULL); |
| el_set (m_editline, EL_BIND, "-a", "^H", "lldb-delete-previous-char", NULL); |
| el_set (m_editline, EL_BIND, "-a", "^?", "lldb-delete-previous-char", NULL); |
| |
| // Escape is absorbed exiting edit mode, so re-register important sequences |
| // without the prefix |
| el_set (m_editline, EL_BIND, "-a", "[A", "lldb-previous-line", NULL); |
| el_set (m_editline, EL_BIND, "-a", "[B", "lldb-next-line", NULL); |
| el_set (m_editline, EL_BIND, "-a", "[\\^", "lldb-revert-line", NULL); |
| } |
| } |
| } |
| |
| //------------------------------------------------------------------ |
| // Editline public methods |
| //------------------------------------------------------------------ |
| |
| Editline * |
| Editline::InstanceFor (EditLine * editline) |
| { |
| Editline * editor; |
| el_get (editline, EL_CLIENTDATA, &editor); |
| return editor; |
| } |
| |
| Editline::Editline (const char * editline_name, FILE * input_file, FILE * output_file, FILE * error_file, bool color_prompts) : |
| m_editor_status (EditorStatus::Complete), |
| m_color_prompts(color_prompts), |
| m_input_file (input_file), |
| m_output_file (output_file), |
| m_error_file (error_file), |
| m_input_connection (fileno(input_file), false) |
| { |
| // Get a shared history instance |
| m_editor_name = (editline_name == nullptr) ? "lldb-tmp" : editline_name; |
| m_history_sp = EditlineHistory::GetHistory (m_editor_name); |
| } |
| |
| Editline::~Editline() |
| { |
| if (m_editline) |
| { |
| // Disable edit mode to stop the terminal from flushing all input |
| // during the call to el_end() since we expect to have multiple editline |
| // instances in this program. |
| el_set (m_editline, EL_EDITMODE, 0); |
| el_end (m_editline); |
| m_editline = nullptr; |
| } |
| |
| // EditlineHistory objects are sometimes shared between multiple |
| // Editline instances with the same program name. So just release |
| // our shared pointer and if we are the last owner, it will save the |
| // history to the history save file automatically. |
| m_history_sp.reset(); |
| } |
| |
| void |
| Editline::SetPrompt (const char * prompt) |
| { |
| m_set_prompt = prompt == nullptr ? "" : prompt; |
| } |
| |
| void |
| Editline::SetContinuationPrompt (const char * continuation_prompt) |
| { |
| m_set_continuation_prompt = continuation_prompt == nullptr ? "" : continuation_prompt; |
| } |
| |
| void |
| Editline::TerminalSizeChanged() |
| { |
| if (m_editline != nullptr) |
| { |
| el_resize (m_editline); |
| int columns; |
| // Despite the man page claiming non-zero indicates success, it's actually zero |
| if (el_get (m_editline, EL_GETTC, "co", &columns) == 0) |
| { |
| m_terminal_width = columns; |
| if (m_current_line_rows != -1) |
| { |
| const LineInfoW * info = el_wline (m_editline); |
| int lineLength = (int)((info->lastchar - info->buffer) + GetPromptWidth()); |
| m_current_line_rows = (lineLength / columns) + 1; |
| } |
| } |
| else |
| { |
| m_terminal_width = INT_MAX; |
| m_current_line_rows = 1; |
| } |
| } |
| } |
| |
| const char * |
| Editline::GetPrompt() |
| { |
| return m_set_prompt.c_str(); |
| } |
| |
| uint32_t |
| Editline::GetCurrentLine() |
| { |
| return m_current_line_index; |
| } |
| |
| bool |
| Editline::Interrupt() |
| { |
| bool result = true; |
| Mutex::Locker locker(m_output_mutex); |
| if (m_editor_status == EditorStatus::Editing) { |
| fprintf(m_output_file, "^C\n"); |
| result = m_input_connection.InterruptRead(); |
| } |
| m_editor_status = EditorStatus::Interrupted; |
| return result; |
| } |
| |
| bool |
| Editline::Cancel() |
| { |
| bool result = true; |
| Mutex::Locker locker(m_output_mutex); |
| if (m_editor_status == EditorStatus::Editing) { |
| MoveCursor(CursorLocation::EditingCursor, CursorLocation::BlockStart); |
| fprintf(m_output_file, ANSI_CLEAR_BELOW); |
| result = m_input_connection.InterruptRead(); |
| } |
| m_editor_status = EditorStatus::Interrupted; |
| return result; |
| } |
| |
| void |
| Editline::SetAutoCompleteCallback (CompleteCallbackType callback, void * baton) |
| { |
| m_completion_callback = callback; |
| m_completion_callback_baton = baton; |
| } |
| |
| void |
| Editline::SetIsInputCompleteCallback (IsInputCompleteCallbackType callback, void * baton) |
| { |
| m_is_input_complete_callback = callback; |
| m_is_input_complete_callback_baton = baton; |
| } |
| |
| bool |
| Editline::SetFixIndentationCallback (FixIndentationCallbackType callback, |
| void * baton, |
| const char * indent_chars) |
| { |
| m_fix_indentation_callback = callback; |
| m_fix_indentation_callback_baton = baton; |
| m_fix_indentation_callback_chars = indent_chars; |
| return false; |
| } |
| |
| bool |
| Editline::GetLine (std::string &line, bool &interrupted) |
| { |
| ConfigureEditor (false); |
| m_input_lines = std::vector<EditLineStringType>(); |
| m_input_lines.insert (m_input_lines.begin(), EditLineConstString("")); |
| |
| Mutex::Locker locker(m_output_mutex); |
| |
| lldbassert(m_editor_status != EditorStatus::Editing); |
| if (m_editor_status == EditorStatus::Interrupted) |
| { |
| m_editor_status = EditorStatus::Complete; |
| interrupted = true; |
| return true; |
| } |
| |
| SetCurrentLine (0); |
| m_in_history = false; |
| m_editor_status = EditorStatus::Editing; |
| m_revert_cursor_index = -1; |
| |
| #ifdef USE_SETUPTERM_WORKAROUND |
| setupterm((char *)0, fileno(m_output_file), (int *)0); |
| #endif |
| |
| int count; |
| auto input = el_wgets (m_editline, &count); |
| |
| interrupted = m_editor_status == EditorStatus::Interrupted; |
| if (!interrupted) |
| { |
| if (input == nullptr) |
| { |
| fprintf (m_output_file, "\n"); |
| m_editor_status = EditorStatus::EndOfInput; |
| } |
| else |
| { |
| m_history_sp->Enter (input); |
| #if LLDB_EDITLINE_USE_WCHAR |
| line = m_utf8conv.to_bytes (SplitLines (input)[0]); |
| #else |
| line = SplitLines (input)[0]; |
| #endif |
| m_editor_status = EditorStatus::Complete; |
| } |
| } |
| return m_editor_status != EditorStatus::EndOfInput; |
| } |
| |
| bool |
| Editline::GetLines (int first_line_number, StringList &lines, bool &interrupted) |
| { |
| ConfigureEditor (true); |
| |
| // Print the initial input lines, then move the cursor back up to the start of input |
| SetBaseLineNumber (first_line_number); |
| m_input_lines = std::vector<EditLineStringType>(); |
| m_input_lines.insert (m_input_lines.begin(), EditLineConstString("")); |
| |
| Mutex::Locker locker(m_output_mutex); |
| // Begin the line editing loop |
| DisplayInput(); |
| SetCurrentLine (0); |
| MoveCursor (CursorLocation::BlockEnd, CursorLocation::BlockStart); |
| m_editor_status = EditorStatus::Editing; |
| m_in_history = false; |
| |
| m_revert_cursor_index = -1; |
| while (m_editor_status == EditorStatus::Editing) |
| { |
| #ifdef USE_SETUPTERM_WORKAROUND |
| setupterm((char *)0, fileno(m_output_file), (int *)0); |
| #endif |
| int count; |
| m_current_line_rows = -1; |
| el_wpush (m_editline, EditLineConstString("\x1b[^")); // Revert to the existing line content |
| el_wgets (m_editline, &count); |
| } |
| |
| interrupted = m_editor_status == EditorStatus::Interrupted; |
| if (!interrupted) |
| { |
| // Save the completed entry in history before returning |
| m_history_sp->Enter (CombineLines (m_input_lines).c_str()); |
| |
| lines = GetInputAsStringList(); |
| } |
| return m_editor_status != EditorStatus::EndOfInput; |
| } |
| |
| void |
| Editline::PrintAsync (Stream *stream, const char *s, size_t len) |
| { |
| Mutex::Locker locker(m_output_mutex); |
| if (m_editor_status == EditorStatus::Editing) |
| { |
| MoveCursor(CursorLocation::EditingCursor, CursorLocation::BlockStart); |
| fprintf(m_output_file, ANSI_CLEAR_BELOW); |
| } |
| stream->Write (s, len); |
| stream->Flush(); |
| if (m_editor_status == EditorStatus::Editing) |
| { |
| DisplayInput(); |
| MoveCursor(CursorLocation::BlockEnd, CursorLocation::EditingCursor); |
| } |
| } |