Index: lldb/include/lldb/Core/Debugger.h =================================================================== --- lldb/include/lldb/Core/Debugger.h +++ lldb/include/lldb/Core/Debugger.h @@ -273,6 +273,8 @@ bool SetUseColor(bool use_color); + bool GetUseAutosuggestion() const; + bool GetUseSourceCache() const; bool SetUseSourceCache(bool use_source_cache); Index: lldb/include/lldb/Core/IOHandler.h =================================================================== --- lldb/include/lldb/Core/IOHandler.h +++ lldb/include/lldb/Core/IOHandler.h @@ -202,6 +202,9 @@ virtual void IOHandlerDeactivated(IOHandler &io_handler) {} + virtual void IOHandlerSuggestion(IOHandler &io_handler, llvm::StringRef line, + std::string &result); + virtual void IOHandlerComplete(IOHandler &io_handler, CompletionRequest &request); @@ -419,6 +422,9 @@ static int FixIndentationCallback(Editline *editline, const StringList &lines, int cursor_position, void *baton); + static void SuggestionCallback(llvm::StringRef line, std::string &result, + void *baton); + static void AutoCompleteCallback(CompletionRequest &request, void *baton); #endif Index: lldb/include/lldb/Host/Editline.h =================================================================== --- lldb/include/lldb/Host/Editline.h +++ lldb/include/lldb/Host/Editline.h @@ -98,6 +98,9 @@ const StringList &lines, int cursor_position, void *baton); +typedef void (*SuggestionCallbackType)(llvm::StringRef line, + std::string &result, void *baton); + typedef void (*CompleteCallbackType)(CompletionRequest &request, void *baton); /// Status used to decide when and how to start editing another line in @@ -184,6 +187,8 @@ /// Cancel this edit and oblitarate all trace of it bool Cancel(); + void SetSuggestionCallback(SuggestionCallbackType callback, void *baton); + /// Register a callback for the tab key void SetAutoCompleteCallback(CompleteCallbackType callback, void *baton); @@ -312,6 +317,12 @@ /// tab key is typed. unsigned char TabCommand(int ch); + /// Apply autosuggestion part in gray as editline. + unsigned char ApplyCompleteCommand(int ch); + + /// Command used when a character is typed. + unsigned char TypedCharacter(int ch); + /// Respond to normal character insertion by fixing line indentation unsigned char FixIndentationCommand(int ch); @@ -359,9 +370,11 @@ FixIndentationCallbackType m_fix_indentation_callback = nullptr; void *m_fix_indentation_callback_baton = nullptr; const char *m_fix_indentation_callback_chars = nullptr; + SuggestionCallbackType m_suggestion_callback = nullptr; + void *m_suggestion_callback_baton = nullptr; CompleteCallbackType m_completion_callback = nullptr; void *m_completion_callback_baton = nullptr; - + std::string m_current_autosuggestion = ""; std::mutex m_output_mutex; }; } Index: lldb/include/lldb/Interpreter/CommandInterpreter.h =================================================================== --- lldb/include/lldb/Interpreter/CommandInterpreter.h +++ lldb/include/lldb/Interpreter/CommandInterpreter.h @@ -350,6 +350,11 @@ CommandObject *GetCommandObjectForCommand(llvm::StringRef &command_line); + /// Returns the auto-suggestion string that should be added to the given + /// command line. + llvm::Optional GetAutoSuggestionForCommand(llvm::StringRef line, + std::string &result); + // This handles command line completion. void HandleCompletion(CompletionRequest &request); Index: lldb/source/Core/CoreProperties.td =================================================================== --- lldb/source/Core/CoreProperties.td +++ lldb/source/Core/CoreProperties.td @@ -131,4 +131,8 @@ Global, DefaultStringValue<"frame #${frame.index}: ${ansi.fg.yellow}${frame.pc}${ansi.normal}{ ${module.file.basename}{`${function.name-without-args}{${frame.no-debug}${function.pc-offset}}}}{ at ${ansi.fg.cyan}${line.file.basename}${ansi.normal}:${ansi.fg.yellow}${line.number}${ansi.normal}{:${ansi.fg.yellow}${line.column}${ansi.normal}}}{${function.is-optimized} [opt]}{${frame.is-artificial} [artificial]}\\\\n">, Desc<"The default frame format string to use when displaying stack frameinformation for threads from thread backtrace unique.">; + def ShowAutosuggestion: Property<"show-autosuggestion", "Boolean">, + Global, + DefaultFalse, + Desc<"If true, LLDB will show suggestions on possible commands the user might want to type.">; } Index: lldb/source/Core/Debugger.cpp =================================================================== --- lldb/source/Core/Debugger.cpp +++ lldb/source/Core/Debugger.cpp @@ -346,6 +346,12 @@ return ret; } +bool Debugger::GetUseAutosuggestion() const { + const uint32_t idx = ePropertyShowAutosuggestion; + return m_collection_sp->GetPropertyAtIndexAsBoolean( + nullptr, idx, g_debugger_properties[idx].default_uint_value != 0); +} + bool Debugger::GetUseSourceCache() const { const uint32_t idx = ePropertyUseSourceCache; return m_collection_sp->GetPropertyAtIndexAsBoolean( Index: lldb/source/Core/IOHandler.cpp =================================================================== --- lldb/source/Core/IOHandler.cpp +++ lldb/source/Core/IOHandler.cpp @@ -195,6 +195,15 @@ } } +void IOHandlerDelegate::IOHandlerSuggestion(IOHandler &io_handler, + llvm::StringRef line, + std::string &result) { + if (io_handler.GetDebugger().GetUseAutosuggestion()) + io_handler.GetDebugger() + .GetCommandInterpreter() + .GetAutoSuggestionForCommand(line, result); +} + void IOHandlerDelegate::IOHandlerComplete(IOHandler &io_handler, CompletionRequest &request) { switch (m_completion) { @@ -257,6 +266,7 @@ GetOutputFILE(), GetErrorFILE(), m_color_prompts)); m_editline_up->SetIsInputCompleteCallback(IsInputCompleteCallback, this); + m_editline_up->SetSuggestionCallback(SuggestionCallback, this); m_editline_up->SetAutoCompleteCallback(AutoCompleteCallback, this); // See if the delegate supports fixing indentation const char *indent_chars = delegate.IOHandlerGetFixIndentationCharacters(); @@ -429,6 +439,14 @@ *editline_reader, lines, cursor_position); } +void IOHandlerEditline::SuggestionCallback(llvm::StringRef line, + std::string &result, void *baton) { + IOHandlerEditline *editline_reader = (IOHandlerEditline *)baton; + if (editline_reader) + editline_reader->m_delegate.IOHandlerSuggestion(*editline_reader, line, + result); +} + void IOHandlerEditline::AutoCompleteCallback(CompletionRequest &request, void *baton) { IOHandlerEditline *editline_reader = (IOHandlerEditline *)baton; Index: lldb/source/Host/common/Editline.cpp =================================================================== --- lldb/source/Host/common/Editline.cpp +++ lldb/source/Host/common/Editline.cpp @@ -14,6 +14,7 @@ #include "lldb/Host/Editline.h" #include "lldb/Host/FileSystem.h" #include "lldb/Host/Host.h" +#include "lldb/Utility/AnsiTerminal.h" #include "lldb/Utility/CompletionRequest.h" #include "lldb/Utility/FileSpec.h" #include "lldb/Utility/LLDBAssert.h" @@ -1040,6 +1041,36 @@ return CC_REDISPLAY; } +unsigned char Editline::ApplyCompleteCommand(int ch) { + el_insertstr(m_editline, m_current_autosuggestion.c_str()); + m_current_autosuggestion = ""; + return CC_REDISPLAY; +} + +unsigned char Editline::TypedCharacter(int ch) { + std::string typed = std::string(1, ch); + el_insertstr(m_editline, typed.c_str()); + const LineInfo *line_info = el_line(m_editline); + llvm::StringRef line(line_info->buffer, + line_info->lastchar - line_info->buffer); + + std::string to_add; + m_suggestion_callback(line, to_add, m_suggestion_callback_baton); + m_current_autosuggestion = to_add; + + if (to_add.empty()) + return CC_REDISPLAY; + + std::string to_add_color = ansi::FormatAnsiTerminalCodes("${ansi.faint}") + + to_add + + ansi::FormatAnsiTerminalCodes("${ansi.normal}"); + fputs(typed.c_str(), m_output_file); + fputs(to_add_color.c_str(), m_output_file); + MoveCursor(CursorLocation::BlockEnd, CursorLocation::EditingPrompt); + + return CC_REFRESH; +} + void Editline::ConfigureEditor(bool multiline) { if (m_editline && m_multiline_enabled == multiline) return; @@ -1159,6 +1190,21 @@ el_set(m_editline, EL_BIND, "\t", "lldb-complete", NULL); // Bind TAB to auto complete + el_wset(m_editline, EL_ADDFN, EditLineConstString("lldb-apply-complete"), + EditLineConstString("Adopt autocompletion"), + (EditlineCommandCallbackType)([](EditLine *editline, int ch) { + return Editline::InstanceFor(editline)->ApplyCompleteCommand(ch); + })); + + el_set(m_editline, EL_BIND, "^f", "lldb-apply-complete", + NULL); // Apply a part that is suggested automatically + + el_wset(m_editline, EL_ADDFN, EditLineConstString("lldb-typed-character"), + EditLineConstString("Typed character"), + (EditlineCommandCallbackType)([](EditLine *editline, int ch) { + return Editline::InstanceFor(editline)->TypedCharacter(ch); + })); + // Allow ctrl-left-arrow and ctrl-right-arrow for navigation, behave like // bash in emacs mode. el_set(m_editline, EL_BIND, ESCAPE "[1;5C", "em-next-word", NULL); @@ -1190,6 +1236,17 @@ } } + if (true) { + char bind_key[2] = {0, 0}; + llvm::StringRef indent_chars = + "abcdefghijklmnopqrstuvwxzyABCDEFGHIJKLMNOPQRSTUVWXZY1234567890!\"#$%&'" + "()*+,./:;<=>?@[]_`{|}~ "; + for (char c : indent_chars) { + bind_key[0] = c; + el_set(m_editline, EL_BIND, bind_key, "lldb-typed-character", NULL); + } + } + // Multi-line editor bindings if (multiline) { el_set(m_editline, EL_BIND, "\n", "lldb-end-or-add-line", NULL); @@ -1364,6 +1421,12 @@ return result; } +void Editline::SetSuggestionCallback(SuggestionCallbackType callback, + void *baton) { + m_suggestion_callback = callback; + m_suggestion_callback_baton = baton; +} + void Editline::SetAutoCompleteCallback(CompleteCallbackType callback, void *baton) { m_completion_callback = callback; Index: lldb/source/Interpreter/CommandInterpreter.cpp =================================================================== --- lldb/source/Interpreter/CommandInterpreter.cpp +++ lldb/source/Interpreter/CommandInterpreter.cpp @@ -1866,6 +1866,21 @@ HandleCompletionMatches(request); } +llvm::Optional +CommandInterpreter::GetAutoSuggestionForCommand(llvm::StringRef line, + std::string &result) { + const size_t s = m_command_history.GetSize(); + for (size_t i = 0; i < s; ++i) { + llvm::StringRef entry = m_command_history.GetStringAtIndex(i); + if (entry.startswith(line)) { + llvm::StringRef res = entry.substr(line.size()); + result = res.str(); + return result; + } + } + return llvm::None; +} + CommandInterpreter::~CommandInterpreter() {} void CommandInterpreter::UpdatePrompt(llvm::StringRef new_prompt) {