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// Copyright 2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <cstdio> // NOLINT
#include <readline/readline.h>
#include <readline/history.h>
#include "d8.h"
// There are incompatibilities between different versions and different
// implementations of readline. This smooths out one known incompatibility.
#if RL_READLINE_VERSION >= 0x0500
#define completion_matches rl_completion_matches
#endif
namespace v8 {
class ReadLineEditor: public LineEditor {
public:
ReadLineEditor() : LineEditor(LineEditor::READLINE, "readline") { }
virtual i::SmartPointer<char> Prompt(const char* prompt);
virtual bool Open();
virtual bool Close();
virtual void AddHistory(const char* str);
private:
static char** AttemptedCompletion(const char* text, int start, int end);
static char* CompletionGenerator(const char* text, int state);
static char kWordBreakCharacters[];
};
static ReadLineEditor read_line_editor;
char ReadLineEditor::kWordBreakCharacters[] = {' ', '\t', '\n', '"',
'\\', '\'', '`', '@', '.', '>', '<', '=', ';', '|', '&', '{', '(',
'\0'};
bool ReadLineEditor::Open() {
rl_initialize();
rl_attempted_completion_function = AttemptedCompletion;
rl_completer_word_break_characters = kWordBreakCharacters;
rl_bind_key('\t', rl_complete);
using_history();
return read_history(Shell::kHistoryFileName) == 0;
}
bool ReadLineEditor::Close() {
return write_history(Shell::kHistoryFileName) == 0;
}
i::SmartPointer<char> ReadLineEditor::Prompt(const char* prompt) {
char* result = readline(prompt);
return i::SmartPointer<char>(result);
}
void ReadLineEditor::AddHistory(const char* str) {
add_history(str);
}
char** ReadLineEditor::AttemptedCompletion(const char* text,
int start,
int end) {
char** result = completion_matches(text, CompletionGenerator);
rl_attempted_completion_over = true;
return result;
}
char* ReadLineEditor::CompletionGenerator(const char* text, int state) {
static unsigned current_index;
static Persistent<Array> current_completions;
if (state == 0) {
i::SmartPointer<char> full_text(i::StrNDup(rl_line_buffer, rl_point));
HandleScope scope;
Handle<Array> completions =
Shell::GetCompletions(String::New(text), String::New(*full_text));
current_completions = Persistent<Array>::New(completions);
current_index = 0;
}
if (current_index < current_completions->Length()) {
HandleScope scope;
Handle<Integer> index = Integer::New(current_index);
Handle<Value> str_obj = current_completions->Get(index);
current_index++;
String::Utf8Value str(str_obj);
return strdup(*str);
} else {
current_completions.Dispose();
current_completions.Clear();
return NULL;
}
}
} // namespace v8
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