kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1 | // Copyright 2008 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 29 | #include <cstdio> // NOLINT |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 30 | #include <readline/readline.h> // NOLINT |
| 31 | #include <readline/history.h> // NOLINT |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 32 | |
| 33 | |
| 34 | #include "d8.h" |
| 35 | |
| 36 | |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 37 | // There are incompatibilities between different versions and different |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 38 | // implementations of readline. This smooths out one known incompatibility. |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 39 | #if RL_READLINE_VERSION >= 0x0500 |
| 40 | #define completion_matches rl_completion_matches |
| 41 | #endif |
| 42 | |
| 43 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 44 | namespace v8 { |
| 45 | |
| 46 | |
| 47 | class ReadLineEditor: public LineEditor { |
| 48 | public: |
| 49 | ReadLineEditor() : LineEditor(LineEditor::READLINE, "readline") { } |
| 50 | virtual i::SmartPointer<char> Prompt(const char* prompt); |
| 51 | virtual bool Open(); |
| 52 | virtual bool Close(); |
| 53 | virtual void AddHistory(const char* str); |
| 54 | private: |
| 55 | static char** AttemptedCompletion(const char* text, int start, int end); |
| 56 | static char* CompletionGenerator(const char* text, int state); |
| 57 | static char kWordBreakCharacters[]; |
| 58 | }; |
| 59 | |
| 60 | |
| 61 | static ReadLineEditor read_line_editor; |
| 62 | char ReadLineEditor::kWordBreakCharacters[] = {' ', '\t', '\n', '"', |
| 63 | '\\', '\'', '`', '@', '.', '>', '<', '=', ';', '|', '&', '{', '(', |
| 64 | '\0'}; |
| 65 | |
| 66 | |
| 67 | bool ReadLineEditor::Open() { |
| 68 | rl_initialize(); |
| 69 | rl_attempted_completion_function = AttemptedCompletion; |
| 70 | rl_completer_word_break_characters = kWordBreakCharacters; |
| 71 | rl_bind_key('\t', rl_complete); |
| 72 | using_history(); |
| 73 | return read_history(Shell::kHistoryFileName) == 0; |
| 74 | } |
| 75 | |
| 76 | |
| 77 | bool ReadLineEditor::Close() { |
| 78 | return write_history(Shell::kHistoryFileName) == 0; |
| 79 | } |
| 80 | |
| 81 | |
| 82 | i::SmartPointer<char> ReadLineEditor::Prompt(const char* prompt) { |
| 83 | char* result = readline(prompt); |
| 84 | return i::SmartPointer<char>(result); |
| 85 | } |
| 86 | |
| 87 | |
| 88 | void ReadLineEditor::AddHistory(const char* str) { |
| 89 | add_history(str); |
| 90 | } |
| 91 | |
| 92 | |
| 93 | char** ReadLineEditor::AttemptedCompletion(const char* text, |
| 94 | int start, |
| 95 | int end) { |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 96 | char** result = completion_matches(text, CompletionGenerator); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 97 | rl_attempted_completion_over = true; |
| 98 | return result; |
| 99 | } |
| 100 | |
| 101 | |
| 102 | char* ReadLineEditor::CompletionGenerator(const char* text, int state) { |
| 103 | static unsigned current_index; |
| 104 | static Persistent<Array> current_completions; |
| 105 | if (state == 0) { |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 106 | i::SmartPointer<char> full_text(i::StrNDup(rl_line_buffer, rl_point)); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 107 | HandleScope scope; |
| 108 | Handle<Array> completions = |
| 109 | Shell::GetCompletions(String::New(text), String::New(*full_text)); |
| 110 | current_completions = Persistent<Array>::New(completions); |
| 111 | current_index = 0; |
| 112 | } |
| 113 | if (current_index < current_completions->Length()) { |
| 114 | HandleScope scope; |
| 115 | Handle<Integer> index = Integer::New(current_index); |
| 116 | Handle<Value> str_obj = current_completions->Get(index); |
| 117 | current_index++; |
| 118 | String::Utf8Value str(str_obj); |
| 119 | return strdup(*str); |
| 120 | } else { |
| 121 | current_completions.Dispose(); |
| 122 | current_completions.Clear(); |
| 123 | return NULL; |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | |
| 128 | } // namespace v8 |