Show More
This diff has been collapsed as it changes many lines, (694 lines changed) Show them Hide them | |||
@@ -1,978 +1,1052 | |||
|
1 | 1 | # Standard library imports |
|
2 | 2 | import sys |
|
3 | 3 | |
|
4 | 4 | # System library imports |
|
5 | 5 | from PyQt4 import QtCore, QtGui |
|
6 | 6 | |
|
7 | 7 | # Local imports |
|
8 | 8 | from ansi_code_processor import QtAnsiCodeProcessor |
|
9 | 9 | from completion_widget import CompletionWidget |
|
10 | 10 | |
|
11 | 11 | |
|
12 |
class ConsoleWidget(QtGui.Q |
|
|
12 | class ConsoleWidget(QtGui.QWidget): | |
|
13 | 13 | """ Base class for console-type widgets. This class is mainly concerned with |
|
14 | 14 | dealing with the prompt, keeping the cursor inside the editing line, and |
|
15 | 15 | handling ANSI escape sequences. |
|
16 | 16 | """ |
|
17 | 17 | |
|
18 | 18 | # Whether to process ANSI escape codes. |
|
19 | 19 | ansi_codes = True |
|
20 | 20 | |
|
21 | 21 | # The maximum number of lines of text before truncation. |
|
22 | 22 | buffer_size = 500 |
|
23 | 23 | |
|
24 | 24 | # Whether to use a CompletionWidget or plain text output for tab completion. |
|
25 | 25 | gui_completion = True |
|
26 | 26 | |
|
27 | 27 | # Whether to override ShortcutEvents for the keybindings defined by this |
|
28 | 28 | # widget (Ctrl+n, Ctrl+a, etc). Enable this if you want this widget to take |
|
29 | 29 | # priority (when it has focus) over, e.g., window-level menu shortcuts. |
|
30 | 30 | override_shortcuts = False |
|
31 | 31 | |
|
32 | # Signals that indicate ConsoleWidget state. | |
|
33 | copy_available = QtCore.pyqtSignal(bool) | |
|
34 | redo_available = QtCore.pyqtSignal(bool) | |
|
35 | undo_available = QtCore.pyqtSignal(bool) | |
|
36 | ||
|
32 | 37 | # Protected class variables. |
|
33 | 38 | _ctrl_down_remap = { QtCore.Qt.Key_B : QtCore.Qt.Key_Left, |
|
34 | 39 | QtCore.Qt.Key_F : QtCore.Qt.Key_Right, |
|
35 | 40 | QtCore.Qt.Key_A : QtCore.Qt.Key_Home, |
|
36 | 41 | QtCore.Qt.Key_E : QtCore.Qt.Key_End, |
|
37 | 42 | QtCore.Qt.Key_P : QtCore.Qt.Key_Up, |
|
38 | 43 | QtCore.Qt.Key_N : QtCore.Qt.Key_Down, |
|
39 | 44 | QtCore.Qt.Key_D : QtCore.Qt.Key_Delete, } |
|
40 | 45 | _shortcuts = set(_ctrl_down_remap.keys() + |
|
41 | 46 | [ QtCore.Qt.Key_C, QtCore.Qt.Key_V ]) |
|
42 | 47 | |
|
43 | 48 | #--------------------------------------------------------------------------- |
|
44 | 49 | # 'QObject' interface |
|
45 | 50 | #--------------------------------------------------------------------------- |
|
46 | 51 | |
|
47 | def __init__(self, parent=None): | |
|
48 | QtGui.QPlainTextEdit.__init__(self, parent) | |
|
52 | def __init__(self, kind='plain', parent=None): | |
|
53 | """ Create a ConsoleWidget. | |
|
54 | ||
|
55 | Parameters | |
|
56 | ---------- | |
|
57 | kind : str, optional [default 'plain'] | |
|
58 | The type of text widget to use. Valid values are 'plain', which | |
|
59 | specifies a QPlainTextEdit, and 'rich', which specifies an | |
|
60 | QTextEdit. | |
|
61 | ||
|
62 | parent : QWidget, optional [default None] | |
|
63 | The parent for this widget. | |
|
64 | """ | |
|
65 | super(ConsoleWidget, self).__init__(parent) | |
|
66 | ||
|
67 | # Create the underlying text widget. | |
|
68 | self._control = self._create_control(kind) | |
|
49 | 69 | |
|
50 | 70 | # Initialize protected variables. Some variables contain useful state |
|
51 | 71 | # information for subclasses; they should be considered read-only. |
|
52 | 72 | self._ansi_processor = QtAnsiCodeProcessor() |
|
53 | self._completion_widget = CompletionWidget(self) | |
|
73 | self._completion_widget = CompletionWidget(self._control) | |
|
54 | 74 | self._continuation_prompt = '> ' |
|
55 | 75 | self._continuation_prompt_html = None |
|
56 | 76 | self._executing = False |
|
57 | 77 | self._prompt = '' |
|
58 | 78 | self._prompt_html = None |
|
59 | 79 | self._prompt_pos = 0 |
|
60 | 80 | self._reading = False |
|
61 | 81 | self._reading_callback = None |
|
62 | 82 | self._tab_width = 8 |
|
63 | 83 | |
|
64 | # Set a monospaced font. | |
|
65 | self.reset_font() | |
|
66 | ||
|
67 | 84 | # Define a custom context menu. |
|
68 |
self._context_menu = |
|
|
69 | ||
|
70 | copy_action = QtGui.QAction('Copy', self) | |
|
71 | copy_action.triggered.connect(self.copy) | |
|
72 | self.copyAvailable.connect(copy_action.setEnabled) | |
|
73 | self._context_menu.addAction(copy_action) | |
|
85 | self._context_menu = self._create_context_menu() | |
|
74 | 86 | |
|
75 | self._paste_action = QtGui.QAction('Paste', self) | |
|
76 | self._paste_action.triggered.connect(self.paste) | |
|
77 | self._context_menu.addAction(self._paste_action) | |
|
78 | self._context_menu.addSeparator() | |
|
87 | # Set a monospaced font. | |
|
88 | self.reset_font() | |
|
79 | 89 | |
|
80 | select_all_action = QtGui.QAction('Select All', self) | |
|
81 | select_all_action.triggered.connect(self.selectAll) | |
|
82 | self._context_menu.addAction(select_all_action) | |
|
83 | ||
|
84 | def event(self, event): | |
|
85 | """ Reimplemented to override shortcuts, if necessary. | |
|
86 | """ | |
|
87 | # On Mac OS, it is always unnecessary to override shortcuts, hence the | |
|
88 | # check below. Users should just use the Control key instead of the | |
|
89 | # Command key. | |
|
90 | if self.override_shortcuts and \ | |
|
91 | sys.platform != 'darwin' and \ | |
|
92 | event.type() == QtCore.QEvent.ShortcutOverride and \ | |
|
93 | self._control_down(event.modifiers()) and \ | |
|
94 | event.key() in self._shortcuts: | |
|
95 | event.accept() | |
|
96 | return True | |
|
97 | else: | |
|
98 | return QtGui.QPlainTextEdit.event(self, event) | |
|
90 | def eventFilter(self, obj, event): | |
|
91 | """ Reimplemented to ensure a console-like behavior in the underlying | |
|
92 | text widget. | |
|
93 | """ | |
|
94 | if obj == self._control: | |
|
95 | etype = event.type() | |
|
96 | ||
|
97 | # Override the default context menu with one that does not have | |
|
98 | # destructive actions. | |
|
99 | if etype == QtCore.QEvent.ContextMenu: | |
|
100 | self._context_menu.exec_(event.globalPos()) | |
|
101 | return True | |
|
102 | ||
|
103 | # Disable moving text by drag and drop. | |
|
104 | elif etype == QtCore.QEvent.DragMove: | |
|
105 | return True | |
|
106 | ||
|
107 | elif etype == QtCore.QEvent.KeyPress: | |
|
108 | return self._event_filter_keypress(event) | |
|
109 | ||
|
110 | # On Mac OS, it is always unnecessary to override shortcuts, hence | |
|
111 | # the check below. Users should just use the Control key instead of | |
|
112 | # the Command key. | |
|
113 | elif etype == QtCore.QEvent.ShortcutOverride: | |
|
114 | if sys.platform != 'darwin' and \ | |
|
115 | self._control_key_down(event.modifiers()) and \ | |
|
116 | event.key() in self._shortcuts: | |
|
117 | event.accept() | |
|
118 | return False | |
|
119 | ||
|
120 | return super(ConsoleWidget, self).eventFilter(obj, event) | |
|
99 | 121 | |
|
100 | 122 | #--------------------------------------------------------------------------- |
|
101 |
# ' |
|
|
123 | # 'ConsoleWidget' public interface | |
|
102 | 124 | #--------------------------------------------------------------------------- |
|
103 | 125 | |
|
104 | def contextMenuEvent(self, event): | |
|
105 | """ Reimplemented to create a menu without destructive actions like | |
|
106 | 'Cut' and 'Delete'. | |
|
107 | """ | |
|
108 | clipboard_empty = QtGui.QApplication.clipboard().text().isEmpty() | |
|
109 | self._paste_action.setEnabled(not clipboard_empty) | |
|
110 | ||
|
111 | self._context_menu.exec_(event.globalPos()) | |
|
112 | ||
|
113 | def dragMoveEvent(self, event): | |
|
114 | """ Reimplemented to disable moving text by drag and drop. | |
|
115 | """ | |
|
116 | event.ignore() | |
|
117 | ||
|
118 | def keyPressEvent(self, event): | |
|
119 | """ Reimplemented to create a console-like interface. | |
|
120 | """ | |
|
121 | intercepted = False | |
|
122 | cursor = self.textCursor() | |
|
123 | position = cursor.position() | |
|
124 | key = event.key() | |
|
125 | ctrl_down = self._control_down(event.modifiers()) | |
|
126 | alt_down = event.modifiers() & QtCore.Qt.AltModifier | |
|
127 | shift_down = event.modifiers() & QtCore.Qt.ShiftModifier | |
|
128 | ||
|
129 | # Even though we have reimplemented 'paste', the C++ level slot is still | |
|
130 | # called by Qt. So we intercept the key press here. | |
|
131 | if event.matches(QtGui.QKeySequence.Paste): | |
|
132 | self.paste() | |
|
133 | intercepted = True | |
|
134 | ||
|
135 | elif ctrl_down: | |
|
136 | if key in self._ctrl_down_remap: | |
|
137 | ctrl_down = False | |
|
138 | key = self._ctrl_down_remap[key] | |
|
139 | event = QtGui.QKeyEvent(QtCore.QEvent.KeyPress, key, | |
|
140 | QtCore.Qt.NoModifier) | |
|
141 | ||
|
142 | elif key == QtCore.Qt.Key_K: | |
|
143 | if self._in_buffer(position): | |
|
144 | cursor.movePosition(QtGui.QTextCursor.EndOfLine, | |
|
145 | QtGui.QTextCursor.KeepAnchor) | |
|
146 | cursor.removeSelectedText() | |
|
147 | intercepted = True | |
|
148 | ||
|
149 | elif key == QtCore.Qt.Key_X: | |
|
150 | intercepted = True | |
|
151 | ||
|
152 | elif key == QtCore.Qt.Key_Y: | |
|
153 | self.paste() | |
|
154 | intercepted = True | |
|
155 | ||
|
156 | elif alt_down: | |
|
157 | if key == QtCore.Qt.Key_B: | |
|
158 | self.setTextCursor(self._get_word_start_cursor(position)) | |
|
159 | intercepted = True | |
|
160 | ||
|
161 | elif key == QtCore.Qt.Key_F: | |
|
162 | self.setTextCursor(self._get_word_end_cursor(position)) | |
|
163 | intercepted = True | |
|
164 | ||
|
165 | elif key == QtCore.Qt.Key_Backspace: | |
|
166 | cursor = self._get_word_start_cursor(position) | |
|
167 | cursor.setPosition(position, QtGui.QTextCursor.KeepAnchor) | |
|
168 | cursor.removeSelectedText() | |
|
169 | intercepted = True | |
|
170 | ||
|
171 | elif key == QtCore.Qt.Key_D: | |
|
172 | cursor = self._get_word_end_cursor(position) | |
|
173 | cursor.setPosition(position, QtGui.QTextCursor.KeepAnchor) | |
|
174 | cursor.removeSelectedText() | |
|
175 | intercepted = True | |
|
176 | ||
|
177 | if self._completion_widget.isVisible(): | |
|
178 | self._completion_widget.keyPressEvent(event) | |
|
179 | intercepted = event.isAccepted() | |
|
180 | ||
|
181 | else: | |
|
182 | if key in (QtCore.Qt.Key_Return, QtCore.Qt.Key_Enter): | |
|
183 | if self._reading: | |
|
184 | self.appendPlainText('\n') | |
|
185 | self._reading = False | |
|
186 | if self._reading_callback: | |
|
187 | self._reading_callback() | |
|
188 | elif not self._executing: | |
|
189 | self.execute(interactive=True) | |
|
190 | intercepted = True | |
|
191 | ||
|
192 | elif key == QtCore.Qt.Key_Up: | |
|
193 | if self._reading or not self._up_pressed(): | |
|
194 | intercepted = True | |
|
195 | else: | |
|
196 | prompt_line = self._get_prompt_cursor().blockNumber() | |
|
197 | intercepted = cursor.blockNumber() <= prompt_line | |
|
198 | ||
|
199 | elif key == QtCore.Qt.Key_Down: | |
|
200 | if self._reading or not self._down_pressed(): | |
|
201 | intercepted = True | |
|
202 | else: | |
|
203 | end_line = self._get_end_cursor().blockNumber() | |
|
204 | intercepted = cursor.blockNumber() == end_line | |
|
205 | ||
|
206 | elif key == QtCore.Qt.Key_Tab: | |
|
207 | if self._reading: | |
|
208 | intercepted = False | |
|
209 | else: | |
|
210 | intercepted = not self._tab_pressed() | |
|
211 | ||
|
212 | elif key == QtCore.Qt.Key_Left: | |
|
213 | intercepted = not self._in_buffer(position - 1) | |
|
214 | ||
|
215 | elif key == QtCore.Qt.Key_Home: | |
|
216 | cursor.movePosition(QtGui.QTextCursor.StartOfLine) | |
|
217 | start_line = cursor.blockNumber() | |
|
218 | if start_line == self._get_prompt_cursor().blockNumber(): | |
|
219 | start_pos = self._prompt_pos | |
|
220 | else: | |
|
221 | start_pos = cursor.position() | |
|
222 | start_pos += len(self._continuation_prompt) | |
|
223 | if shift_down and self._in_buffer(position): | |
|
224 | self._set_selection(position, start_pos) | |
|
225 | else: | |
|
226 | self._set_position(start_pos) | |
|
227 | intercepted = True | |
|
228 | ||
|
229 | elif key == QtCore.Qt.Key_Backspace and not alt_down: | |
|
230 | ||
|
231 | # Line deletion (remove continuation prompt) | |
|
232 | len_prompt = len(self._continuation_prompt) | |
|
233 | if not self._reading and \ | |
|
234 | cursor.columnNumber() == len_prompt and \ | |
|
235 | position != self._prompt_pos: | |
|
236 | cursor.setPosition(position - len_prompt, | |
|
237 | QtGui.QTextCursor.KeepAnchor) | |
|
238 | cursor.removeSelectedText() | |
|
239 | ||
|
240 | # Regular backwards deletion | |
|
241 | else: | |
|
242 | anchor = cursor.anchor() | |
|
243 | if anchor == position: | |
|
244 | intercepted = not self._in_buffer(position - 1) | |
|
245 | else: | |
|
246 | intercepted = not self._in_buffer(min(anchor, position)) | |
|
247 | ||
|
248 | elif key == QtCore.Qt.Key_Delete: | |
|
249 | anchor = cursor.anchor() | |
|
250 | intercepted = not self._in_buffer(min(anchor, position)) | |
|
251 | ||
|
252 | # Don't move cursor if control is down to allow copy-paste using | |
|
253 | # the keyboard in any part of the buffer. | |
|
254 | if not ctrl_down: | |
|
255 | self._keep_cursor_in_buffer() | |
|
256 | ||
|
257 | if not intercepted: | |
|
258 | QtGui.QPlainTextEdit.keyPressEvent(self, event) | |
|
259 | ||
|
260 | #-------------------------------------------------------------------------- | |
|
261 | # 'QPlainTextEdit' interface | |
|
262 | #-------------------------------------------------------------------------- | |
|
263 | ||
|
264 | def appendHtml(self, html): | |
|
265 | """ Reimplemented to not append HTML as a new paragraph, which doesn't | |
|
266 | make sense for a console widget. | |
|
267 | """ | |
|
268 | cursor = self._get_end_cursor() | |
|
269 | self._insert_html(cursor, html) | |
|
270 | ||
|
271 | def appendPlainText(self, text): | |
|
272 | """ Reimplemented to not append text as a new paragraph, which doesn't | |
|
273 | make sense for a console widget. Also, if enabled, handle ANSI | |
|
274 | codes. | |
|
275 | """ | |
|
276 | cursor = self._get_end_cursor() | |
|
277 | if self.ansi_codes: | |
|
278 | for substring in self._ansi_processor.split_string(text): | |
|
279 | format = self._ansi_processor.get_format() | |
|
280 | cursor.insertText(substring, format) | |
|
281 | else: | |
|
282 | cursor.insertText(text) | |
|
283 | ||
|
284 | 126 | def clear(self, keep_input=False): |
|
285 |
""" |
|
|
127 | """ Clear the console, then write a new prompt. If 'keep_input' is set, | |
|
286 | 128 | restores the old input buffer when the new prompt is written. |
|
287 | 129 | """ |
|
288 | QtGui.QPlainTextEdit.clear(self) | |
|
130 | self._control.clear() | |
|
289 | 131 | if keep_input: |
|
290 | 132 | input_buffer = self.input_buffer |
|
291 | 133 | self._show_prompt() |
|
292 | 134 | if keep_input: |
|
293 | 135 | self.input_buffer = input_buffer |
|
294 | 136 | |
|
295 |
def |
|
|
296 | """ Reimplemented to ensure that text is pasted in the editing region. | |
|
137 | def copy(self): | |
|
138 | """ Copy the current selected text to the clipboard. | |
|
297 | 139 | """ |
|
298 | self._keep_cursor_in_buffer() | |
|
299 | QtGui.QPlainTextEdit.paste(self) | |
|
300 | ||
|
301 | def print_(self, printer): | |
|
302 | """ Reimplemented to work around a bug in PyQt: the C++ level 'print_' | |
|
303 | slot has the wrong signature. | |
|
304 | """ | |
|
305 | QtGui.QPlainTextEdit.print_(self, printer) | |
|
306 | ||
|
307 | #--------------------------------------------------------------------------- | |
|
308 | # 'ConsoleWidget' public interface | |
|
309 | #--------------------------------------------------------------------------- | |
|
140 | self._control.copy() | |
|
310 | 141 | |
|
311 | 142 | def execute(self, source=None, hidden=False, interactive=False): |
|
312 | 143 | """ Executes source or the input buffer, possibly prompting for more |
|
313 | 144 | input. |
|
314 | 145 | |
|
315 | 146 | Parameters: |
|
316 | 147 | ----------- |
|
317 | 148 | source : str, optional |
|
318 | 149 | |
|
319 | 150 | The source to execute. If not specified, the input buffer will be |
|
320 | 151 | used. If specified and 'hidden' is False, the input buffer will be |
|
321 | 152 | replaced with the source before execution. |
|
322 | 153 | |
|
323 | 154 | hidden : bool, optional (default False) |
|
324 | 155 | |
|
325 | 156 | If set, no output will be shown and the prompt will not be modified. |
|
326 | 157 | In other words, it will be completely invisible to the user that |
|
327 | 158 | an execution has occurred. |
|
328 | 159 | |
|
329 | 160 | interactive : bool, optional (default False) |
|
330 | 161 | |
|
331 | 162 | Whether the console is to treat the source as having been manually |
|
332 | 163 | entered by the user. The effect of this parameter depends on the |
|
333 | 164 | subclass implementation. |
|
334 | 165 | |
|
335 | 166 | Raises: |
|
336 | 167 | ------- |
|
337 | 168 | RuntimeError |
|
338 | 169 | If incomplete input is given and 'hidden' is True. In this case, |
|
339 | 170 | it not possible to prompt for more input. |
|
340 | 171 | |
|
341 | 172 | Returns: |
|
342 | 173 | -------- |
|
343 | 174 | A boolean indicating whether the source was executed. |
|
344 | 175 | """ |
|
345 | 176 | if not hidden: |
|
346 | 177 | if source is not None: |
|
347 | 178 | self.input_buffer = source |
|
348 | 179 | |
|
349 |
self.append |
|
|
180 | self._append_plain_text('\n') | |
|
350 | 181 | self._executing_input_buffer = self.input_buffer |
|
351 | 182 | self._executing = True |
|
352 | 183 | self._prompt_finished() |
|
353 | 184 | |
|
354 | 185 | real_source = self.input_buffer if source is None else source |
|
355 | 186 | complete = self._is_complete(real_source, interactive) |
|
356 | 187 | if complete: |
|
357 | 188 | if not hidden: |
|
358 | 189 | # The maximum block count is only in effect during execution. |
|
359 | 190 | # This ensures that _prompt_pos does not become invalid due to |
|
360 | 191 | # text truncation. |
|
361 | self.setMaximumBlockCount(self.buffer_size) | |
|
192 | self._control.document().setMaximumBlockCount(self.buffer_size) | |
|
362 | 193 | self._execute(real_source, hidden) |
|
363 | 194 | elif hidden: |
|
364 | 195 | raise RuntimeError('Incomplete noninteractive input: "%s"' % source) |
|
365 | 196 | else: |
|
366 | 197 | self._show_continuation_prompt() |
|
367 | 198 | |
|
368 | 199 | return complete |
|
369 | 200 | |
|
370 | 201 | def _get_input_buffer(self): |
|
371 | 202 | """ The text that the user has entered entered at the current prompt. |
|
372 | 203 | """ |
|
373 | 204 | # If we're executing, the input buffer may not even exist anymore due to |
|
374 | 205 | # the limit imposed by 'buffer_size'. Therefore, we store it. |
|
375 | 206 | if self._executing: |
|
376 | 207 | return self._executing_input_buffer |
|
377 | 208 | |
|
378 | 209 | cursor = self._get_end_cursor() |
|
379 | 210 | cursor.setPosition(self._prompt_pos, QtGui.QTextCursor.KeepAnchor) |
|
380 | 211 | input_buffer = str(cursor.selection().toPlainText()) |
|
381 | 212 | |
|
382 | 213 | # Strip out continuation prompts. |
|
383 | 214 | return input_buffer.replace('\n' + self._continuation_prompt, '\n') |
|
384 | 215 | |
|
385 | 216 | def _set_input_buffer(self, string): |
|
386 | 217 | """ Replaces the text in the input buffer with 'string'. |
|
387 | 218 | """ |
|
388 | 219 | # Remove old text. |
|
389 | 220 | cursor = self._get_end_cursor() |
|
390 | 221 | cursor.setPosition(self._prompt_pos, QtGui.QTextCursor.KeepAnchor) |
|
391 | 222 | cursor.removeSelectedText() |
|
392 | 223 | |
|
393 | 224 | # Insert new text with continuation prompts. |
|
394 | 225 | lines = string.splitlines(True) |
|
395 | 226 | if lines: |
|
396 |
self.append |
|
|
227 | self._append_plain_text(lines[0]) | |
|
397 | 228 | for i in xrange(1, len(lines)): |
|
398 | 229 | if self._continuation_prompt_html is None: |
|
399 |
self.append |
|
|
230 | self._append_plain_text(self._continuation_prompt) | |
|
400 | 231 | else: |
|
401 |
self.append |
|
|
402 |
self.append |
|
|
403 | self.moveCursor(QtGui.QTextCursor.End) | |
|
232 | self._append_html(self._continuation_prompt_html) | |
|
233 | self._append_plain_text(lines[i]) | |
|
234 | self._control.moveCursor(QtGui.QTextCursor.End) | |
|
404 | 235 | |
|
405 | 236 | input_buffer = property(_get_input_buffer, _set_input_buffer) |
|
406 | 237 | |
|
407 | 238 | def _get_input_buffer_cursor_line(self): |
|
408 | 239 | """ The text in the line of the input buffer in which the user's cursor |
|
409 | 240 | rests. Returns a string if there is such a line; otherwise, None. |
|
410 | 241 | """ |
|
411 | 242 | if self._executing: |
|
412 | 243 | return None |
|
413 | cursor = self.textCursor() | |
|
244 | cursor = self._control.textCursor() | |
|
414 | 245 | if cursor.position() >= self._prompt_pos: |
|
415 | 246 | text = self._get_block_plain_text(cursor.block()) |
|
416 | 247 | if cursor.blockNumber() == self._get_prompt_cursor().blockNumber(): |
|
417 | 248 | return text[len(self._prompt):] |
|
418 | 249 | else: |
|
419 | 250 | return text[len(self._continuation_prompt):] |
|
420 | 251 | else: |
|
421 | 252 | return None |
|
422 | 253 | |
|
423 | 254 | input_buffer_cursor_line = property(_get_input_buffer_cursor_line) |
|
424 | 255 | |
|
425 | 256 | def _get_font(self): |
|
426 | 257 | """ The base font being used by the ConsoleWidget. |
|
427 | 258 | """ |
|
428 | return self.document().defaultFont() | |
|
259 | return self._control.document().defaultFont() | |
|
429 | 260 | |
|
430 | 261 | def _set_font(self, font): |
|
431 | 262 | """ Sets the base font for the ConsoleWidget to the specified QFont. |
|
432 | 263 | """ |
|
433 | 264 | font_metrics = QtGui.QFontMetrics(font) |
|
434 | self.setTabStopWidth(self.tab_width * font_metrics.width(' ')) | |
|
265 | self._control.setTabStopWidth(self.tab_width * font_metrics.width(' ')) | |
|
435 | 266 | |
|
436 | 267 | self._completion_widget.setFont(font) |
|
437 | self.document().setDefaultFont(font) | |
|
268 | self._control.document().setDefaultFont(font) | |
|
438 | 269 | |
|
439 | 270 | font = property(_get_font, _set_font) |
|
440 | 271 | |
|
272 | def paste(self): | |
|
273 | """ Paste the contents of the clipboard into the input region. | |
|
274 | """ | |
|
275 | self._keep_cursor_in_buffer() | |
|
276 | self._control.paste() | |
|
277 | ||
|
278 | def print_(self, printer): | |
|
279 | """ Print the contents of the ConsoleWidget to the specified QPrinter. | |
|
280 | """ | |
|
281 | self._control.print_(printer) | |
|
282 | ||
|
283 | def redo(self): | |
|
284 | """ Redo the last operation. If there is no operation to redo, nothing | |
|
285 | happens. | |
|
286 | """ | |
|
287 | self._control.redo() | |
|
288 | ||
|
441 | 289 | def reset_font(self): |
|
442 | 290 | """ Sets the font to the default fixed-width font for this platform. |
|
443 | 291 | """ |
|
444 | 292 | if sys.platform == 'win32': |
|
445 | 293 | name = 'Courier' |
|
446 | 294 | elif sys.platform == 'darwin': |
|
447 | 295 | name = 'Monaco' |
|
448 | 296 | else: |
|
449 | 297 | name = 'Monospace' |
|
450 | 298 | font = QtGui.QFont(name, QtGui.qApp.font().pointSize()) |
|
451 | 299 | font.setStyleHint(QtGui.QFont.TypeWriter) |
|
452 | 300 | self._set_font(font) |
|
453 | 301 | |
|
302 | def select_all(self): | |
|
303 | """ Selects all the text in the buffer. | |
|
304 | """ | |
|
305 | self._control.selectAll() | |
|
306 | ||
|
454 | 307 | def _get_tab_width(self): |
|
455 | 308 | """ The width (in terms of space characters) for tab characters. |
|
456 | 309 | """ |
|
457 | 310 | return self._tab_width |
|
458 | 311 | |
|
459 | 312 | def _set_tab_width(self, tab_width): |
|
460 | 313 | """ Sets the width (in terms of space characters) for tab characters. |
|
461 | 314 | """ |
|
462 | 315 | font_metrics = QtGui.QFontMetrics(self.font) |
|
463 | self.setTabStopWidth(tab_width * font_metrics.width(' ')) | |
|
316 | self._control.setTabStopWidth(tab_width * font_metrics.width(' ')) | |
|
464 | 317 | |
|
465 | 318 | self._tab_width = tab_width |
|
466 | 319 | |
|
467 | 320 | tab_width = property(_get_tab_width, _set_tab_width) |
|
468 | ||
|
321 | ||
|
322 | def undo(self): | |
|
323 | """ Undo the last operation. If there is no operation to undo, nothing | |
|
324 | happens. | |
|
325 | """ | |
|
326 | self._control.undo() | |
|
327 | ||
|
469 | 328 | #--------------------------------------------------------------------------- |
|
470 | 329 | # 'ConsoleWidget' abstract interface |
|
471 | 330 | #--------------------------------------------------------------------------- |
|
472 | 331 | |
|
473 | 332 | def _is_complete(self, source, interactive): |
|
474 | 333 | """ Returns whether 'source' can be executed. When triggered by an |
|
475 | 334 | Enter/Return key press, 'interactive' is True; otherwise, it is |
|
476 | 335 | False. |
|
477 | 336 | """ |
|
478 | 337 | raise NotImplementedError |
|
479 | 338 | |
|
480 | 339 | def _execute(self, source, hidden): |
|
481 | 340 | """ Execute 'source'. If 'hidden', do not show any output. |
|
482 | 341 | """ |
|
483 | 342 | raise NotImplementedError |
|
484 | 343 | |
|
485 | 344 | def _prompt_started_hook(self): |
|
486 | 345 | """ Called immediately after a new prompt is displayed. |
|
487 | 346 | """ |
|
488 | 347 | pass |
|
489 | 348 | |
|
490 | 349 | def _prompt_finished_hook(self): |
|
491 | 350 | """ Called immediately after a prompt is finished, i.e. when some input |
|
492 | 351 | will be processed and a new prompt displayed. |
|
493 | 352 | """ |
|
494 | 353 | pass |
|
495 | 354 | |
|
496 | 355 | def _up_pressed(self): |
|
497 | 356 | """ Called when the up key is pressed. Returns whether to continue |
|
498 | 357 | processing the event. |
|
499 | 358 | """ |
|
500 | 359 | return True |
|
501 | 360 | |
|
502 | 361 | def _down_pressed(self): |
|
503 | 362 | """ Called when the down key is pressed. Returns whether to continue |
|
504 | 363 | processing the event. |
|
505 | 364 | """ |
|
506 | 365 | return True |
|
507 | 366 | |
|
508 | 367 | def _tab_pressed(self): |
|
509 | 368 | """ Called when the tab key is pressed. Returns whether to continue |
|
510 | 369 | processing the event. |
|
511 | 370 | """ |
|
512 | 371 | return False |
|
513 | 372 | |
|
514 | 373 | #-------------------------------------------------------------------------- |
|
515 | 374 | # 'ConsoleWidget' protected interface |
|
516 | 375 | #-------------------------------------------------------------------------- |
|
517 | 376 | |
|
377 | def _append_html(self, html): | |
|
378 | """ Appends html at the end of the console buffer. | |
|
379 | """ | |
|
380 | cursor = self._get_end_cursor() | |
|
381 | self._insert_html(cursor, html) | |
|
382 | ||
|
518 | 383 | def _append_html_fetching_plain_text(self, html): |
|
519 | 384 | """ Appends 'html', then returns the plain text version of it. |
|
520 | 385 | """ |
|
521 | 386 | anchor = self._get_end_cursor().position() |
|
522 |
self.append |
|
|
387 | self._append_html(html) | |
|
523 | 388 | cursor = self._get_end_cursor() |
|
524 | 389 | cursor.setPosition(anchor, QtGui.QTextCursor.KeepAnchor) |
|
525 | 390 | return str(cursor.selection().toPlainText()) |
|
526 | 391 | |
|
392 | def _append_plain_text(self, text): | |
|
393 | """ Appends plain text at the end of the console buffer, processing | |
|
394 | ANSI codes if enabled. | |
|
395 | """ | |
|
396 | cursor = self._get_end_cursor() | |
|
397 | if self.ansi_codes: | |
|
398 | for substring in self._ansi_processor.split_string(text): | |
|
399 | format = self._ansi_processor.get_format() | |
|
400 | cursor.insertText(substring, format) | |
|
401 | else: | |
|
402 | cursor.insertText(text) | |
|
403 | ||
|
527 | 404 | def _append_plain_text_keeping_prompt(self, text): |
|
528 | 405 | """ Writes 'text' after the current prompt, then restores the old prompt |
|
529 | 406 | with its old input buffer. |
|
530 | 407 | """ |
|
531 | 408 | input_buffer = self.input_buffer |
|
532 |
self.append |
|
|
409 | self._append_plain_text('\n') | |
|
533 | 410 | self._prompt_finished() |
|
534 | 411 | |
|
535 |
self.append |
|
|
412 | self._append_plain_text(text) | |
|
536 | 413 | self._show_prompt() |
|
537 | 414 | self.input_buffer = input_buffer |
|
538 | 415 | |
|
539 | def _control_down(self, modifiers): | |
|
416 | def _complete_with_items(self, cursor, items): | |
|
417 | """ Performs completion with 'items' at the specified cursor location. | |
|
418 | """ | |
|
419 | if len(items) == 1: | |
|
420 | cursor.setPosition(self._control.textCursor().position(), | |
|
421 | QtGui.QTextCursor.KeepAnchor) | |
|
422 | cursor.insertText(items[0]) | |
|
423 | elif len(items) > 1: | |
|
424 | if self.gui_completion: | |
|
425 | self._completion_widget.show_items(cursor, items) | |
|
426 | else: | |
|
427 | text = self._format_as_columns(items) | |
|
428 | self._append_plain_text_keeping_prompt(text) | |
|
429 | ||
|
430 | def _control_key_down(self, modifiers): | |
|
540 | 431 | """ Given a KeyboardModifiers flags object, return whether the Control |
|
541 | 432 | key is down (on Mac OS, treat the Command key as a synonym for |
|
542 | 433 | Control). |
|
543 | 434 | """ |
|
544 | 435 | down = bool(modifiers & QtCore.Qt.ControlModifier) |
|
545 | 436 | |
|
546 | 437 | # Note: on Mac OS, ControlModifier corresponds to the Command key while |
|
547 | 438 | # MetaModifier corresponds to the Control key. |
|
548 | 439 | if sys.platform == 'darwin': |
|
549 | 440 | down = down ^ bool(modifiers & QtCore.Qt.MetaModifier) |
|
550 | 441 | |
|
551 | 442 | return down |
|
552 | ||
|
553 | def _complete_with_items(self, cursor, items): | |
|
554 | """ Performs completion with 'items' at the specified cursor location. | |
|
443 | ||
|
444 | def _create_context_menu(self): | |
|
445 | """ Creates a context menu for the underlying text widget. | |
|
555 | 446 | """ |
|
556 | if len(items) == 1: | |
|
557 | cursor.setPosition(self.textCursor().position(), | |
|
558 | QtGui.QTextCursor.KeepAnchor) | |
|
559 | cursor.insertText(items[0]) | |
|
560 | elif len(items) > 1: | |
|
561 | if self.gui_completion: | |
|
562 | self._completion_widget.show_items(cursor, items) | |
|
563 | else: | |
|
564 | text = self._format_as_columns(items) | |
|
565 | self._append_plain_text_keeping_prompt(text) | |
|
447 | menu = QtGui.QMenu(self) | |
|
448 | clipboard = QtGui.QApplication.clipboard() | |
|
449 | ||
|
450 | copy_action = QtGui.QAction('Copy', self) | |
|
451 | copy_action.triggered.connect(self.copy) | |
|
452 | self.copy_available.connect(copy_action.setEnabled) | |
|
453 | menu.addAction(copy_action) | |
|
454 | ||
|
455 | paste_action = QtGui.QAction('Paste', self) | |
|
456 | paste_action.triggered.connect(self.paste) | |
|
457 | clipboard.dataChanged.connect( | |
|
458 | lambda: paste_action.setEnabled(not clipboard.text().isEmpty())) | |
|
459 | menu.addAction(paste_action) | |
|
460 | menu.addSeparator() | |
|
461 | ||
|
462 | select_all_action = QtGui.QAction('Select All', self) | |
|
463 | select_all_action.triggered.connect(self.select_all) | |
|
464 | menu.addAction(select_all_action) | |
|
465 | ||
|
466 | return menu | |
|
467 | ||
|
468 | def _create_control(self, kind): | |
|
469 | """ Creates and sets the underlying text widget. | |
|
470 | """ | |
|
471 | layout = QtGui.QVBoxLayout(self) | |
|
472 | layout.setMargin(0) | |
|
473 | if kind == 'plain': | |
|
474 | control = QtGui.QPlainTextEdit() | |
|
475 | elif kind == 'rich': | |
|
476 | control = QtGui.QTextEdit() | |
|
477 | else: | |
|
478 | raise ValueError("Kind %s unknown." % repr(kind)) | |
|
479 | layout.addWidget(control) | |
|
480 | ||
|
481 | control.installEventFilter(self) | |
|
482 | control.copyAvailable.connect(self.copy_available) | |
|
483 | control.redoAvailable.connect(self.redo_available) | |
|
484 | control.undoAvailable.connect(self.undo_available) | |
|
485 | ||
|
486 | return control | |
|
487 | ||
|
488 | def _event_filter_keypress(self, event): | |
|
489 | """ Filter key events for the underlying text widget to create a | |
|
490 | console-like interface. | |
|
491 | """ | |
|
492 | intercepted = False | |
|
493 | replaced_event = None | |
|
494 | cursor = self._control.textCursor() | |
|
495 | position = cursor.position() | |
|
496 | key = event.key() | |
|
497 | ctrl_down = self._control_key_down(event.modifiers()) | |
|
498 | alt_down = event.modifiers() & QtCore.Qt.AltModifier | |
|
499 | shift_down = event.modifiers() & QtCore.Qt.ShiftModifier | |
|
500 | ||
|
501 | # Even though we have reimplemented 'paste', the C++ level slot is still | |
|
502 | # called by Qt. So we intercept the key press here. | |
|
503 | if event.matches(QtGui.QKeySequence.Paste): | |
|
504 | self.paste() | |
|
505 | intercepted = True | |
|
506 | ||
|
507 | elif ctrl_down: | |
|
508 | if key in self._ctrl_down_remap: | |
|
509 | ctrl_down = False | |
|
510 | key = self._ctrl_down_remap[key] | |
|
511 | replaced_event = QtGui.QKeyEvent(QtCore.QEvent.KeyPress, key, | |
|
512 | QtCore.Qt.NoModifier) | |
|
513 | ||
|
514 | elif key == QtCore.Qt.Key_K: | |
|
515 | if self._in_buffer(position): | |
|
516 | cursor.movePosition(QtGui.QTextCursor.EndOfLine, | |
|
517 | QtGui.QTextCursor.KeepAnchor) | |
|
518 | cursor.removeSelectedText() | |
|
519 | intercepted = True | |
|
520 | ||
|
521 | elif key == QtCore.Qt.Key_X: | |
|
522 | intercepted = True | |
|
523 | ||
|
524 | elif key == QtCore.Qt.Key_Y: | |
|
525 | self.paste() | |
|
526 | intercepted = True | |
|
527 | ||
|
528 | elif alt_down: | |
|
529 | if key == QtCore.Qt.Key_B: | |
|
530 | self._set_cursor(self._get_word_start_cursor(position)) | |
|
531 | intercepted = True | |
|
532 | ||
|
533 | elif key == QtCore.Qt.Key_F: | |
|
534 | self._set_cursor(self._get_word_end_cursor(position)) | |
|
535 | intercepted = True | |
|
536 | ||
|
537 | elif key == QtCore.Qt.Key_Backspace: | |
|
538 | cursor = self._get_word_start_cursor(position) | |
|
539 | cursor.setPosition(position, QtGui.QTextCursor.KeepAnchor) | |
|
540 | cursor.removeSelectedText() | |
|
541 | intercepted = True | |
|
542 | ||
|
543 | elif key == QtCore.Qt.Key_D: | |
|
544 | cursor = self._get_word_end_cursor(position) | |
|
545 | cursor.setPosition(position, QtGui.QTextCursor.KeepAnchor) | |
|
546 | cursor.removeSelectedText() | |
|
547 | intercepted = True | |
|
548 | ||
|
549 | if self._completion_widget.isVisible(): | |
|
550 | self._completion_widget.keyPressEvent(event) | |
|
551 | intercepted = event.isAccepted() | |
|
552 | ||
|
553 | else: | |
|
554 | if key in (QtCore.Qt.Key_Return, QtCore.Qt.Key_Enter): | |
|
555 | if self._reading: | |
|
556 | self._append_plain_text('\n') | |
|
557 | self._reading = False | |
|
558 | if self._reading_callback: | |
|
559 | self._reading_callback() | |
|
560 | elif not self._executing: | |
|
561 | self.execute(interactive=True) | |
|
562 | intercepted = True | |
|
563 | ||
|
564 | elif key == QtCore.Qt.Key_Up: | |
|
565 | if self._reading or not self._up_pressed(): | |
|
566 | intercepted = True | |
|
567 | else: | |
|
568 | prompt_line = self._get_prompt_cursor().blockNumber() | |
|
569 | intercepted = cursor.blockNumber() <= prompt_line | |
|
570 | ||
|
571 | elif key == QtCore.Qt.Key_Down: | |
|
572 | if self._reading or not self._down_pressed(): | |
|
573 | intercepted = True | |
|
574 | else: | |
|
575 | end_line = self._get_end_cursor().blockNumber() | |
|
576 | intercepted = cursor.blockNumber() == end_line | |
|
577 | ||
|
578 | elif key == QtCore.Qt.Key_Tab: | |
|
579 | if self._reading: | |
|
580 | intercepted = False | |
|
581 | else: | |
|
582 | intercepted = not self._tab_pressed() | |
|
583 | ||
|
584 | elif key == QtCore.Qt.Key_Left: | |
|
585 | intercepted = not self._in_buffer(position - 1) | |
|
586 | ||
|
587 | elif key == QtCore.Qt.Key_Home: | |
|
588 | cursor.movePosition(QtGui.QTextCursor.StartOfLine) | |
|
589 | start_line = cursor.blockNumber() | |
|
590 | if start_line == self._get_prompt_cursor().blockNumber(): | |
|
591 | start_pos = self._prompt_pos | |
|
592 | else: | |
|
593 | start_pos = cursor.position() | |
|
594 | start_pos += len(self._continuation_prompt) | |
|
595 | if shift_down and self._in_buffer(position): | |
|
596 | self._set_selection(position, start_pos) | |
|
597 | else: | |
|
598 | self._set_position(start_pos) | |
|
599 | intercepted = True | |
|
600 | ||
|
601 | elif key == QtCore.Qt.Key_Backspace and not alt_down: | |
|
602 | ||
|
603 | # Line deletion (remove continuation prompt) | |
|
604 | len_prompt = len(self._continuation_prompt) | |
|
605 | if not self._reading and \ | |
|
606 | cursor.columnNumber() == len_prompt and \ | |
|
607 | position != self._prompt_pos: | |
|
608 | cursor.setPosition(position - len_prompt, | |
|
609 | QtGui.QTextCursor.KeepAnchor) | |
|
610 | cursor.removeSelectedText() | |
|
611 | ||
|
612 | # Regular backwards deletion | |
|
613 | else: | |
|
614 | anchor = cursor.anchor() | |
|
615 | if anchor == position: | |
|
616 | intercepted = not self._in_buffer(position - 1) | |
|
617 | else: | |
|
618 | intercepted = not self._in_buffer(min(anchor, position)) | |
|
619 | ||
|
620 | elif key == QtCore.Qt.Key_Delete: | |
|
621 | anchor = cursor.anchor() | |
|
622 | intercepted = not self._in_buffer(min(anchor, position)) | |
|
623 | ||
|
624 | # Don't move cursor if control is down to allow copy-paste using | |
|
625 | # the keyboard in any part of the buffer. | |
|
626 | if not ctrl_down: | |
|
627 | self._keep_cursor_in_buffer() | |
|
628 | ||
|
629 | if not intercepted and replaced_event: | |
|
630 | QtGui.qApp.sendEvent(self._control, replaced_event) | |
|
631 | return intercepted | |
|
566 | 632 | |
|
567 | 633 | def _format_as_columns(self, items, separator=' '): |
|
568 | 634 | """ Transform a list of strings into a single string with columns. |
|
569 | 635 | |
|
570 | 636 | Parameters |
|
571 | 637 | ---------- |
|
572 | 638 | items : sequence of strings |
|
573 | 639 | The strings to process. |
|
574 | 640 | |
|
575 | 641 | separator : str, optional [default is two spaces] |
|
576 | 642 | The string that separates columns. |
|
577 | 643 | |
|
578 | 644 | Returns |
|
579 | 645 | ------- |
|
580 | 646 | The formatted string. |
|
581 | 647 | """ |
|
582 | 648 | # Note: this code is adapted from columnize 0.3.2. |
|
583 | 649 | # See http://code.google.com/p/pycolumnize/ |
|
584 | 650 | |
|
585 | 651 | font_metrics = QtGui.QFontMetrics(self.font) |
|
586 | 652 | displaywidth = max(5, (self.width() / font_metrics.width(' ')) - 1) |
|
587 | 653 | |
|
588 | 654 | # Some degenerate cases. |
|
589 | 655 | size = len(items) |
|
590 | 656 | if size == 0: |
|
591 | 657 | return '\n' |
|
592 | 658 | elif size == 1: |
|
593 | 659 | return '%s\n' % str(items[0]) |
|
594 | 660 | |
|
595 | 661 | # Try every row count from 1 upwards |
|
596 | 662 | array_index = lambda nrows, row, col: nrows*col + row |
|
597 | 663 | for nrows in range(1, size): |
|
598 | 664 | ncols = (size + nrows - 1) // nrows |
|
599 | 665 | colwidths = [] |
|
600 | 666 | totwidth = -len(separator) |
|
601 | 667 | for col in range(ncols): |
|
602 | 668 | # Get max column width for this column |
|
603 | 669 | colwidth = 0 |
|
604 | 670 | for row in range(nrows): |
|
605 | 671 | i = array_index(nrows, row, col) |
|
606 | 672 | if i >= size: break |
|
607 | 673 | x = items[i] |
|
608 | 674 | colwidth = max(colwidth, len(x)) |
|
609 | 675 | colwidths.append(colwidth) |
|
610 | 676 | totwidth += colwidth + len(separator) |
|
611 | 677 | if totwidth > displaywidth: |
|
612 | 678 | break |
|
613 | 679 | if totwidth <= displaywidth: |
|
614 | 680 | break |
|
615 | 681 | |
|
616 | 682 | # The smallest number of rows computed and the max widths for each |
|
617 | 683 | # column has been obtained. Now we just have to format each of the rows. |
|
618 | 684 | string = '' |
|
619 | 685 | for row in range(nrows): |
|
620 | 686 | texts = [] |
|
621 | 687 | for col in range(ncols): |
|
622 | 688 | i = row + nrows*col |
|
623 | 689 | if i >= size: |
|
624 | 690 | texts.append('') |
|
625 | 691 | else: |
|
626 | 692 | texts.append(items[i]) |
|
627 | 693 | while texts and not texts[-1]: |
|
628 | 694 | del texts[-1] |
|
629 | 695 | for col in range(len(texts)): |
|
630 | 696 | texts[col] = texts[col].ljust(colwidths[col]) |
|
631 | 697 | string += '%s\n' % str(separator.join(texts)) |
|
632 | 698 | return string |
|
633 | 699 | |
|
634 | 700 | def _get_block_plain_text(self, block): |
|
635 | 701 | """ Given a QTextBlock, return its unformatted text. |
|
636 | 702 | """ |
|
637 | 703 | cursor = QtGui.QTextCursor(block) |
|
638 | 704 | cursor.movePosition(QtGui.QTextCursor.StartOfBlock) |
|
639 | 705 | cursor.movePosition(QtGui.QTextCursor.EndOfBlock, |
|
640 | 706 | QtGui.QTextCursor.KeepAnchor) |
|
641 | 707 | return str(cursor.selection().toPlainText()) |
|
708 | ||
|
709 | def _get_cursor(self): | |
|
710 | """ Convenience method that returns a cursor for the current position. | |
|
711 | """ | |
|
712 | return self._control.textCursor() | |
|
642 | 713 | |
|
643 | 714 | def _get_end_cursor(self): |
|
644 | 715 | """ Convenience method that returns a cursor for the last character. |
|
645 | 716 | """ |
|
646 | cursor = self.textCursor() | |
|
717 | cursor = self._control.textCursor() | |
|
647 | 718 | cursor.movePosition(QtGui.QTextCursor.End) |
|
648 | 719 | return cursor |
|
649 | 720 | |
|
650 | 721 | def _get_prompt_cursor(self): |
|
651 | 722 | """ Convenience method that returns a cursor for the prompt position. |
|
652 | 723 | """ |
|
653 | cursor = self.textCursor() | |
|
724 | cursor = self._control.textCursor() | |
|
654 | 725 | cursor.setPosition(self._prompt_pos) |
|
655 | 726 | return cursor |
|
656 | 727 | |
|
657 | 728 | def _get_selection_cursor(self, start, end): |
|
658 | 729 | """ Convenience method that returns a cursor with text selected between |
|
659 | 730 | the positions 'start' and 'end'. |
|
660 | 731 | """ |
|
661 | cursor = self.textCursor() | |
|
732 | cursor = self._control.textCursor() | |
|
662 | 733 | cursor.setPosition(start) |
|
663 | 734 | cursor.setPosition(end, QtGui.QTextCursor.KeepAnchor) |
|
664 | 735 | return cursor |
|
665 | 736 | |
|
666 | 737 | def _get_word_start_cursor(self, position): |
|
667 | 738 | """ Find the start of the word to the left the given position. If a |
|
668 | 739 | sequence of non-word characters precedes the first word, skip over |
|
669 | 740 | them. (This emulates the behavior of bash, emacs, etc.) |
|
670 | 741 | """ |
|
671 | document = self.document() | |
|
742 | document = self._control.document() | |
|
672 | 743 | position -= 1 |
|
673 | 744 | while self._in_buffer(position) and \ |
|
674 | 745 | not document.characterAt(position).isLetterOrNumber(): |
|
675 | 746 | position -= 1 |
|
676 | 747 | while self._in_buffer(position) and \ |
|
677 | 748 | document.characterAt(position).isLetterOrNumber(): |
|
678 | 749 | position -= 1 |
|
679 | cursor = self.textCursor() | |
|
750 | cursor = self._control.textCursor() | |
|
680 | 751 | cursor.setPosition(position + 1) |
|
681 | 752 | return cursor |
|
682 | 753 | |
|
683 | 754 | def _get_word_end_cursor(self, position): |
|
684 | 755 | """ Find the end of the word to the right the given position. If a |
|
685 | 756 | sequence of non-word characters precedes the first word, skip over |
|
686 | 757 | them. (This emulates the behavior of bash, emacs, etc.) |
|
687 | 758 | """ |
|
688 | document = self.document() | |
|
759 | document = self._control.document() | |
|
689 | 760 | end = self._get_end_cursor().position() |
|
690 | 761 | while position < end and \ |
|
691 | 762 | not document.characterAt(position).isLetterOrNumber(): |
|
692 | 763 | position += 1 |
|
693 | 764 | while position < end and \ |
|
694 | 765 | document.characterAt(position).isLetterOrNumber(): |
|
695 | 766 | position += 1 |
|
696 | cursor = self.textCursor() | |
|
767 | cursor = self._control.textCursor() | |
|
697 | 768 | cursor.setPosition(position) |
|
698 | 769 | return cursor |
|
699 | 770 | |
|
700 | 771 | def _insert_html(self, cursor, html): |
|
701 | 772 | """ Insert HTML using the specified cursor in such a way that future |
|
702 | 773 | formatting is unaffected. |
|
703 | 774 | """ |
|
704 | 775 | cursor.insertHtml(html) |
|
705 | 776 | |
|
706 | 777 | # After inserting HTML, the text document "remembers" the current |
|
707 | 778 | # formatting, which means that subsequent calls adding plain text |
|
708 | 779 | # will result in similar formatting, a behavior that we do not want. To |
|
709 | 780 | # prevent this, we make sure that the last character has no formatting. |
|
710 | 781 | cursor.movePosition(QtGui.QTextCursor.Left, |
|
711 | 782 | QtGui.QTextCursor.KeepAnchor) |
|
712 | 783 | if cursor.selection().toPlainText().trimmed().isEmpty(): |
|
713 | 784 | # If the last character is whitespace, it doesn't matter how it's |
|
714 | 785 | # formatted, so just clear the formatting. |
|
715 | 786 | cursor.setCharFormat(QtGui.QTextCharFormat()) |
|
716 | 787 | else: |
|
717 | 788 | # Otherwise, add an unformatted space. |
|
718 | 789 | cursor.movePosition(QtGui.QTextCursor.Right) |
|
719 | 790 | cursor.insertText(' ', QtGui.QTextCharFormat()) |
|
720 | 791 | |
|
792 | def _in_buffer(self, position): | |
|
793 | """ Returns whether the given position is inside the editing region. | |
|
794 | """ | |
|
795 | return position >= self._prompt_pos | |
|
796 | ||
|
797 | def _keep_cursor_in_buffer(self): | |
|
798 | """ Ensures that the cursor is inside the editing region. Returns | |
|
799 | whether the cursor was moved. | |
|
800 | """ | |
|
801 | cursor = self._control.textCursor() | |
|
802 | if cursor.position() < self._prompt_pos: | |
|
803 | cursor.movePosition(QtGui.QTextCursor.End) | |
|
804 | self._control.setTextCursor(cursor) | |
|
805 | return True | |
|
806 | else: | |
|
807 | return False | |
|
808 | ||
|
721 | 809 | def _prompt_started(self): |
|
722 | 810 | """ Called immediately after a new prompt is displayed. |
|
723 | 811 | """ |
|
724 | 812 | # Temporarily disable the maximum block count to permit undo/redo and |
|
725 | 813 | # to ensure that the prompt position does not change due to truncation. |
|
726 | self.setMaximumBlockCount(0) | |
|
727 | self.setUndoRedoEnabled(True) | |
|
814 | self._control.document().setMaximumBlockCount(0) | |
|
815 | self._control.setUndoRedoEnabled(True) | |
|
728 | 816 | |
|
729 | self.setReadOnly(False) | |
|
730 | self.moveCursor(QtGui.QTextCursor.End) | |
|
731 | self.centerCursor() | |
|
817 | self._control.setReadOnly(False) | |
|
818 | self._control.moveCursor(QtGui.QTextCursor.End) | |
|
732 | 819 | |
|
733 | 820 | self._executing = False |
|
734 | 821 | self._prompt_started_hook() |
|
735 | 822 | |
|
736 | 823 | def _prompt_finished(self): |
|
737 | 824 | """ Called immediately after a prompt is finished, i.e. when some input |
|
738 | 825 | will be processed and a new prompt displayed. |
|
739 | 826 | """ |
|
740 | self.setUndoRedoEnabled(False) | |
|
741 | self.setReadOnly(True) | |
|
827 | self._control.setUndoRedoEnabled(False) | |
|
828 | self._control.setReadOnly(True) | |
|
742 | 829 | self._prompt_finished_hook() |
|
743 | 830 | |
|
744 | 831 | def _readline(self, prompt='', callback=None): |
|
745 | 832 | """ Reads one line of input from the user. |
|
746 | 833 | |
|
747 | 834 | Parameters |
|
748 | 835 | ---------- |
|
749 | 836 | prompt : str, optional |
|
750 | 837 | The prompt to print before reading the line. |
|
751 | 838 | |
|
752 | 839 | callback : callable, optional |
|
753 | 840 | A callback to execute with the read line. If not specified, input is |
|
754 | 841 | read *synchronously* and this method does not return until it has |
|
755 | 842 | been read. |
|
756 | 843 | |
|
757 | 844 | Returns |
|
758 | 845 | ------- |
|
759 | 846 | If a callback is specified, returns nothing. Otherwise, returns the |
|
760 | 847 | input string with the trailing newline stripped. |
|
761 | 848 | """ |
|
762 | 849 | if self._reading: |
|
763 | 850 | raise RuntimeError('Cannot read a line. Widget is already reading.') |
|
764 | 851 | |
|
765 | 852 | if not callback and not self.isVisible(): |
|
766 | 853 | # If the user cannot see the widget, this function cannot return. |
|
767 | 854 | raise RuntimeError('Cannot synchronously read a line if the widget' |
|
768 | 855 | 'is not visible!') |
|
769 | 856 | |
|
770 | 857 | self._reading = True |
|
771 | 858 | self._show_prompt(prompt, newline=False) |
|
772 | 859 | |
|
773 | 860 | if callback is None: |
|
774 | 861 | self._reading_callback = None |
|
775 | 862 | while self._reading: |
|
776 | 863 | QtCore.QCoreApplication.processEvents() |
|
777 | 864 | return self.input_buffer.rstrip('\n') |
|
778 | 865 | |
|
779 | 866 | else: |
|
780 | 867 | self._reading_callback = lambda: \ |
|
781 | 868 | callback(self.input_buffer.rstrip('\n')) |
|
782 | 869 | |
|
783 | 870 | def _reset(self): |
|
784 | 871 | """ Clears the console and resets internal state variables. |
|
785 | 872 | """ |
|
786 | QtGui.QPlainTextEdit.clear(self) | |
|
873 | self._control.clear() | |
|
787 | 874 | self._executing = self._reading = False |
|
788 | 875 | |
|
789 | 876 | def _set_continuation_prompt(self, prompt, html=False): |
|
790 | 877 | """ Sets the continuation prompt. |
|
791 | 878 | |
|
792 | 879 | Parameters |
|
793 | 880 | ---------- |
|
794 | 881 | prompt : str |
|
795 | 882 | The prompt to show when more input is needed. |
|
796 | 883 | |
|
797 | 884 | html : bool, optional (default False) |
|
798 | 885 | If set, the prompt will be inserted as formatted HTML. Otherwise, |
|
799 | 886 | the prompt will be treated as plain text, though ANSI color codes |
|
800 | 887 | will be handled. |
|
801 | 888 | """ |
|
802 | 889 | if html: |
|
803 | 890 | self._continuation_prompt_html = prompt |
|
804 | 891 | else: |
|
805 | 892 | self._continuation_prompt = prompt |
|
806 | 893 | self._continuation_prompt_html = None |
|
894 | ||
|
895 | def _set_cursor(self, cursor): | |
|
896 | """ Convenience method to set the current cursor. | |
|
897 | """ | |
|
898 | self._control.setTextCursor(cursor) | |
|
807 | 899 | |
|
808 | 900 | def _set_position(self, position): |
|
809 | 901 | """ Convenience method to set the position of the cursor. |
|
810 | 902 | """ |
|
811 | cursor = self.textCursor() | |
|
903 | cursor = self._control.textCursor() | |
|
812 | 904 | cursor.setPosition(position) |
|
813 | self.setTextCursor(cursor) | |
|
905 | self._control.setTextCursor(cursor) | |
|
814 | 906 | |
|
815 | 907 | def _set_selection(self, start, end): |
|
816 | 908 | """ Convenience method to set the current selected text. |
|
817 | 909 | """ |
|
818 | self.setTextCursor(self._get_selection_cursor(start, end)) | |
|
910 | self._control.setTextCursor(self._get_selection_cursor(start, end)) | |
|
819 | 911 | |
|
820 | 912 | def _show_prompt(self, prompt=None, html=False, newline=True): |
|
821 | 913 | """ Writes a new prompt at the end of the buffer. |
|
822 | 914 | |
|
823 | 915 | Parameters |
|
824 | 916 | ---------- |
|
825 | 917 | prompt : str, optional |
|
826 | 918 | The prompt to show. If not specified, the previous prompt is used. |
|
827 | 919 | |
|
828 | 920 | html : bool, optional (default False) |
|
829 | 921 | Only relevant when a prompt is specified. If set, the prompt will |
|
830 | 922 | be inserted as formatted HTML. Otherwise, the prompt will be treated |
|
831 | 923 | as plain text, though ANSI color codes will be handled. |
|
832 | 924 | |
|
833 | 925 | newline : bool, optional (default True) |
|
834 | 926 | If set, a new line will be written before showing the prompt if |
|
835 | 927 | there is not already a newline at the end of the buffer. |
|
836 | 928 | """ |
|
837 | 929 | # Insert a preliminary newline, if necessary. |
|
838 | 930 | if newline: |
|
839 | 931 | cursor = self._get_end_cursor() |
|
840 | 932 | if cursor.position() > 0: |
|
841 | 933 | cursor.movePosition(QtGui.QTextCursor.Left, |
|
842 | 934 | QtGui.QTextCursor.KeepAnchor) |
|
843 | 935 | if str(cursor.selection().toPlainText()) != '\n': |
|
844 |
self.append |
|
|
936 | self._append_plain_text('\n') | |
|
845 | 937 | |
|
846 | 938 | # Write the prompt. |
|
847 | 939 | if prompt is None: |
|
848 | 940 | if self._prompt_html is None: |
|
849 |
self.append |
|
|
941 | self._append_plain_text(self._prompt) | |
|
850 | 942 | else: |
|
851 |
self.append |
|
|
943 | self._append_html(self._prompt_html) | |
|
852 | 944 | else: |
|
853 | 945 | if html: |
|
854 | 946 | self._prompt = self._append_html_fetching_plain_text(prompt) |
|
855 | 947 | self._prompt_html = prompt |
|
856 | 948 | else: |
|
857 |
self.append |
|
|
949 | self._append_plain_text(prompt) | |
|
858 | 950 | self._prompt = prompt |
|
859 | 951 | self._prompt_html = None |
|
860 | 952 | |
|
861 | 953 | self._prompt_pos = self._get_end_cursor().position() |
|
862 | 954 | self._prompt_started() |
|
863 | 955 | |
|
864 | 956 | def _show_continuation_prompt(self): |
|
865 | 957 | """ Writes a new continuation prompt at the end of the buffer. |
|
866 | 958 | """ |
|
867 | 959 | if self._continuation_prompt_html is None: |
|
868 |
self.append |
|
|
960 | self._append_plain_text(self._continuation_prompt) | |
|
869 | 961 | else: |
|
870 | 962 | self._continuation_prompt = self._append_html_fetching_plain_text( |
|
871 | 963 | self._continuation_prompt_html) |
|
872 | 964 | |
|
873 | 965 | self._prompt_started() |
|
874 | 966 | |
|
875 | def _in_buffer(self, position): | |
|
876 | """ Returns whether the given position is inside the editing region. | |
|
877 | """ | |
|
878 | return position >= self._prompt_pos | |
|
879 | ||
|
880 | def _keep_cursor_in_buffer(self): | |
|
881 | """ Ensures that the cursor is inside the editing region. Returns | |
|
882 | whether the cursor was moved. | |
|
883 | """ | |
|
884 | cursor = self.textCursor() | |
|
885 | if cursor.position() < self._prompt_pos: | |
|
886 | cursor.movePosition(QtGui.QTextCursor.End) | |
|
887 | self.setTextCursor(cursor) | |
|
888 | return True | |
|
889 | else: | |
|
890 | return False | |
|
891 | ||
|
892 | 967 | |
|
893 | 968 | class HistoryConsoleWidget(ConsoleWidget): |
|
894 | 969 | """ A ConsoleWidget that keeps a history of the commands that have been |
|
895 | 970 | executed. |
|
896 | 971 | """ |
|
897 | 972 | |
|
898 | 973 | #--------------------------------------------------------------------------- |
|
899 |
# ' |
|
|
974 | # 'object' interface | |
|
900 | 975 | #--------------------------------------------------------------------------- |
|
901 | 976 | |
|
902 |
def __init__(self, |
|
|
903 |
super(HistoryConsoleWidget, self).__init__( |
|
|
904 | ||
|
977 | def __init__(self, *args, **kw): | |
|
978 | super(HistoryConsoleWidget, self).__init__(*args, **kw) | |
|
905 | 979 | self._history = [] |
|
906 | 980 | self._history_index = 0 |
|
907 | 981 | |
|
908 | 982 | #--------------------------------------------------------------------------- |
|
909 | 983 | # 'ConsoleWidget' public interface |
|
910 | 984 | #--------------------------------------------------------------------------- |
|
911 | 985 | |
|
912 | 986 | def execute(self, source=None, hidden=False, interactive=False): |
|
913 | 987 | """ Reimplemented to the store history. |
|
914 | 988 | """ |
|
915 | 989 | if not hidden: |
|
916 | 990 | history = self.input_buffer if source is None else source |
|
917 | 991 | |
|
918 | 992 | executed = super(HistoryConsoleWidget, self).execute( |
|
919 | 993 | source, hidden, interactive) |
|
920 | 994 | |
|
921 | 995 | if executed and not hidden: |
|
922 | 996 | self._history.append(history.rstrip()) |
|
923 | 997 | self._history_index = len(self._history) |
|
924 | 998 | |
|
925 | 999 | return executed |
|
926 | 1000 | |
|
927 | 1001 | #--------------------------------------------------------------------------- |
|
928 | 1002 | # 'ConsoleWidget' abstract interface |
|
929 | 1003 | #--------------------------------------------------------------------------- |
|
930 | 1004 | |
|
931 | 1005 | def _up_pressed(self): |
|
932 | 1006 | """ Called when the up key is pressed. Returns whether to continue |
|
933 | 1007 | processing the event. |
|
934 | 1008 | """ |
|
935 | 1009 | prompt_cursor = self._get_prompt_cursor() |
|
936 |
if self. |
|
|
1010 | if self._get_cursor().blockNumber() == prompt_cursor.blockNumber(): | |
|
937 | 1011 | self.history_previous() |
|
938 | 1012 | |
|
939 | 1013 | # Go to the first line of prompt for seemless history scrolling. |
|
940 | 1014 | cursor = self._get_prompt_cursor() |
|
941 | 1015 | cursor.movePosition(QtGui.QTextCursor.EndOfLine) |
|
942 |
self. |
|
|
1016 | self._set_cursor(cursor) | |
|
943 | 1017 | |
|
944 | 1018 | return False |
|
945 | 1019 | return True |
|
946 | 1020 | |
|
947 | 1021 | def _down_pressed(self): |
|
948 | 1022 | """ Called when the down key is pressed. Returns whether to continue |
|
949 | 1023 | processing the event. |
|
950 | 1024 | """ |
|
951 | 1025 | end_cursor = self._get_end_cursor() |
|
952 |
if self. |
|
|
1026 | if self._get_cursor().blockNumber() == end_cursor.blockNumber(): | |
|
953 | 1027 | self.history_next() |
|
954 | 1028 | return False |
|
955 | 1029 | return True |
|
956 | 1030 | |
|
957 | 1031 | #--------------------------------------------------------------------------- |
|
958 | 1032 | # 'HistoryConsoleWidget' interface |
|
959 | 1033 | #--------------------------------------------------------------------------- |
|
960 | 1034 | |
|
961 | 1035 | def history_previous(self): |
|
962 | 1036 | """ If possible, set the input buffer to the previous item in the |
|
963 | 1037 | history. |
|
964 | 1038 | """ |
|
965 | 1039 | if self._history_index > 0: |
|
966 | 1040 | self._history_index -= 1 |
|
967 | 1041 | self.input_buffer = self._history[self._history_index] |
|
968 | 1042 | |
|
969 | 1043 | def history_next(self): |
|
970 | 1044 | """ Set the input buffer to the next item in the history, or a blank |
|
971 | 1045 | line if there is no subsequent item. |
|
972 | 1046 | """ |
|
973 | 1047 | if self._history_index < len(self._history): |
|
974 | 1048 | self._history_index += 1 |
|
975 | 1049 | if self._history_index < len(self._history): |
|
976 | 1050 | self.input_buffer = self._history[self._history_index] |
|
977 | 1051 | else: |
|
978 | 1052 | self.input_buffer = '' |
@@ -1,382 +1,384 | |||
|
1 | 1 | # Standard library imports |
|
2 | 2 | import signal |
|
3 | 3 | import sys |
|
4 | 4 | |
|
5 | 5 | # System library imports |
|
6 | 6 | from pygments.lexers import PythonLexer |
|
7 | 7 | from PyQt4 import QtCore, QtGui |
|
8 | 8 | import zmq |
|
9 | 9 | |
|
10 | 10 | # Local imports |
|
11 | 11 | from IPython.core.inputsplitter import InputSplitter |
|
12 | 12 | from call_tip_widget import CallTipWidget |
|
13 | 13 | from completion_lexer import CompletionLexer |
|
14 | 14 | from console_widget import HistoryConsoleWidget |
|
15 | 15 | from pygments_highlighter import PygmentsHighlighter |
|
16 | 16 | |
|
17 | 17 | |
|
18 | 18 | class FrontendHighlighter(PygmentsHighlighter): |
|
19 | 19 | """ A PygmentsHighlighter that can be turned on and off and that ignores |
|
20 | 20 | prompts. |
|
21 | 21 | """ |
|
22 | 22 | |
|
23 | 23 | def __init__(self, frontend): |
|
24 | super(FrontendHighlighter, self).__init__(frontend.document()) | |
|
24 | super(FrontendHighlighter, self).__init__(frontend._control.document()) | |
|
25 | 25 | self._current_offset = 0 |
|
26 | 26 | self._frontend = frontend |
|
27 | 27 | self.highlighting_on = False |
|
28 | 28 | |
|
29 | 29 | def highlightBlock(self, qstring): |
|
30 | 30 | """ Highlight a block of text. Reimplemented to highlight selectively. |
|
31 | 31 | """ |
|
32 | 32 | if not self.highlighting_on: |
|
33 | 33 | return |
|
34 | 34 | |
|
35 | 35 | # The input to this function is unicode string that may contain |
|
36 | 36 | # paragraph break characters, non-breaking spaces, etc. Here we acquire |
|
37 | 37 | # the string as plain text so we can compare it. |
|
38 | 38 | current_block = self.currentBlock() |
|
39 | 39 | string = self._frontend._get_block_plain_text(current_block) |
|
40 | 40 | |
|
41 | 41 | # Decide whether to check for the regular or continuation prompt. |
|
42 | 42 | if current_block.contains(self._frontend._prompt_pos): |
|
43 | 43 | prompt = self._frontend._prompt |
|
44 | 44 | else: |
|
45 | 45 | prompt = self._frontend._continuation_prompt |
|
46 | 46 | |
|
47 | 47 | # Don't highlight the part of the string that contains the prompt. |
|
48 | 48 | if string.startswith(prompt): |
|
49 | 49 | self._current_offset = len(prompt) |
|
50 | 50 | qstring.remove(0, len(prompt)) |
|
51 | 51 | else: |
|
52 | 52 | self._current_offset = 0 |
|
53 | 53 | |
|
54 | 54 | PygmentsHighlighter.highlightBlock(self, qstring) |
|
55 | 55 | |
|
56 | 56 | def setFormat(self, start, count, format): |
|
57 | 57 | """ Reimplemented to highlight selectively. |
|
58 | 58 | """ |
|
59 | 59 | start += self._current_offset |
|
60 | 60 | PygmentsHighlighter.setFormat(self, start, count, format) |
|
61 | 61 | |
|
62 | 62 | |
|
63 | 63 | class FrontendWidget(HistoryConsoleWidget): |
|
64 | 64 | """ A Qt frontend for a generic Python kernel. |
|
65 | 65 | """ |
|
66 | 66 | |
|
67 | 67 | # Emitted when an 'execute_reply' is received from the kernel. |
|
68 | 68 | executed = QtCore.pyqtSignal(object) |
|
69 | 69 | |
|
70 | 70 | #--------------------------------------------------------------------------- |
|
71 |
# ' |
|
|
71 | # 'object' interface | |
|
72 | 72 | #--------------------------------------------------------------------------- |
|
73 | 73 | |
|
74 |
def __init__(self, |
|
|
75 |
super(FrontendWidget, self).__init__( |
|
|
74 | def __init__(self, *args, **kw): | |
|
75 | super(FrontendWidget, self).__init__(*args, **kw) | |
|
76 | 76 | |
|
77 | 77 | # FrontendWidget protected variables. |
|
78 | self._call_tip_widget = CallTipWidget(self) | |
|
78 | self._call_tip_widget = CallTipWidget(self._control) | |
|
79 | 79 | self._completion_lexer = CompletionLexer(PythonLexer()) |
|
80 | 80 | self._hidden = True |
|
81 | 81 | self._highlighter = FrontendHighlighter(self) |
|
82 | 82 | self._input_splitter = InputSplitter(input_mode='replace') |
|
83 | 83 | self._kernel_manager = None |
|
84 | 84 | |
|
85 | 85 | # Configure the ConsoleWidget. |
|
86 | 86 | self.tab_width = 4 |
|
87 | 87 | self._set_continuation_prompt('... ') |
|
88 | 88 | |
|
89 | self.document().contentsChange.connect(self._document_contents_change) | |
|
89 | # Connect signal handlers. | |
|
90 | document = self._control.document() | |
|
91 | document.contentsChange.connect(self._document_contents_change) | |
|
90 | 92 | |
|
91 | 93 | #--------------------------------------------------------------------------- |
|
92 | 94 | # 'QWidget' interface |
|
93 | 95 | #--------------------------------------------------------------------------- |
|
94 | 96 | |
|
95 | 97 | def focusOutEvent(self, event): |
|
96 | 98 | """ Reimplemented to hide calltips. |
|
97 | 99 | """ |
|
98 | 100 | self._call_tip_widget.hide() |
|
99 | 101 | super(FrontendWidget, self).focusOutEvent(event) |
|
100 | 102 | |
|
101 | 103 | def keyPressEvent(self, event): |
|
102 | 104 | """ Reimplemented to allow calltips to process events and to send |
|
103 | 105 | signals to the kernel. |
|
104 | 106 | """ |
|
105 | 107 | if self._executing and event.key() == QtCore.Qt.Key_C and \ |
|
106 | 108 | self._control_down(event.modifiers()): |
|
107 | 109 | self._interrupt_kernel() |
|
108 | 110 | else: |
|
109 | 111 | if self._call_tip_widget.isVisible(): |
|
110 | 112 | self._call_tip_widget.keyPressEvent(event) |
|
111 | 113 | super(FrontendWidget, self).keyPressEvent(event) |
|
112 | 114 | |
|
113 | 115 | #--------------------------------------------------------------------------- |
|
114 | 116 | # 'ConsoleWidget' abstract interface |
|
115 | 117 | #--------------------------------------------------------------------------- |
|
116 | 118 | |
|
117 | 119 | def _is_complete(self, source, interactive): |
|
118 | 120 | """ Returns whether 'source' can be completely processed and a new |
|
119 | 121 | prompt created. When triggered by an Enter/Return key press, |
|
120 | 122 | 'interactive' is True; otherwise, it is False. |
|
121 | 123 | """ |
|
122 | 124 | complete = self._input_splitter.push(source.expandtabs(4)) |
|
123 | 125 | if interactive: |
|
124 | 126 | complete = not self._input_splitter.push_accepts_more() |
|
125 | 127 | return complete |
|
126 | 128 | |
|
127 | 129 | def _execute(self, source, hidden): |
|
128 | 130 | """ Execute 'source'. If 'hidden', do not show any output. |
|
129 | 131 | """ |
|
130 | 132 | self.kernel_manager.xreq_channel.execute(source) |
|
131 | 133 | self._hidden = hidden |
|
132 | 134 | |
|
133 | 135 | def _prompt_started_hook(self): |
|
134 | 136 | """ Called immediately after a new prompt is displayed. |
|
135 | 137 | """ |
|
136 | 138 | if not self._reading: |
|
137 | 139 | self._highlighter.highlighting_on = True |
|
138 | 140 | |
|
139 | 141 | # Auto-indent if this is a continuation prompt. |
|
140 | 142 | if self._get_prompt_cursor().blockNumber() != \ |
|
141 | 143 | self._get_end_cursor().blockNumber(): |
|
142 | 144 | spaces = self._input_splitter.indent_spaces |
|
143 |
self.append |
|
|
144 |
self.append |
|
|
145 | self._append_plain_text('\t' * (spaces / self.tab_width)) | |
|
146 | self._append_plain_text(' ' * (spaces % self.tab_width)) | |
|
145 | 147 | |
|
146 | 148 | def _prompt_finished_hook(self): |
|
147 | 149 | """ Called immediately after a prompt is finished, i.e. when some input |
|
148 | 150 | will be processed and a new prompt displayed. |
|
149 | 151 | """ |
|
150 | 152 | if not self._reading: |
|
151 | 153 | self._highlighter.highlighting_on = False |
|
152 | 154 | |
|
153 | 155 | def _tab_pressed(self): |
|
154 | 156 | """ Called when the tab key is pressed. Returns whether to continue |
|
155 | 157 | processing the event. |
|
156 | 158 | """ |
|
157 | 159 | self._keep_cursor_in_buffer() |
|
158 |
cursor = self. |
|
|
160 | cursor = self._get_cursor() | |
|
159 | 161 | return not self._complete() |
|
160 | 162 | |
|
161 | 163 | #--------------------------------------------------------------------------- |
|
162 | 164 | # 'FrontendWidget' interface |
|
163 | 165 | #--------------------------------------------------------------------------- |
|
164 | 166 | |
|
165 | 167 | def execute_file(self, path, hidden=False): |
|
166 | 168 | """ Attempts to execute file with 'path'. If 'hidden', no output is |
|
167 | 169 | shown. |
|
168 | 170 | """ |
|
169 | 171 | self.execute('execfile("%s")' % path, hidden=hidden) |
|
170 | 172 | |
|
171 | 173 | def _get_kernel_manager(self): |
|
172 | 174 | """ Returns the current kernel manager. |
|
173 | 175 | """ |
|
174 | 176 | return self._kernel_manager |
|
175 | 177 | |
|
176 | 178 | def _set_kernel_manager(self, kernel_manager): |
|
177 | 179 | """ Disconnect from the current kernel manager (if any) and set a new |
|
178 | 180 | kernel manager. |
|
179 | 181 | """ |
|
180 | 182 | # Disconnect the old kernel manager, if necessary. |
|
181 | 183 | if self._kernel_manager is not None: |
|
182 | 184 | self._kernel_manager.started_channels.disconnect( |
|
183 | 185 | self._started_channels) |
|
184 | 186 | self._kernel_manager.stopped_channels.disconnect( |
|
185 | 187 | self._stopped_channels) |
|
186 | 188 | |
|
187 | 189 | # Disconnect the old kernel manager's channels. |
|
188 | 190 | sub = self._kernel_manager.sub_channel |
|
189 | 191 | xreq = self._kernel_manager.xreq_channel |
|
190 | 192 | rep = self._kernel_manager.rep_channel |
|
191 | 193 | sub.message_received.disconnect(self._handle_sub) |
|
192 | 194 | xreq.execute_reply.disconnect(self._handle_execute_reply) |
|
193 | 195 | xreq.complete_reply.disconnect(self._handle_complete_reply) |
|
194 | 196 | xreq.object_info_reply.disconnect(self._handle_object_info_reply) |
|
195 | 197 | rep.input_requested.disconnect(self._handle_req) |
|
196 | 198 | |
|
197 | 199 | # Handle the case where the old kernel manager is still listening. |
|
198 | 200 | if self._kernel_manager.channels_running: |
|
199 | 201 | self._stopped_channels() |
|
200 | 202 | |
|
201 | 203 | # Set the new kernel manager. |
|
202 | 204 | self._kernel_manager = kernel_manager |
|
203 | 205 | if kernel_manager is None: |
|
204 | 206 | return |
|
205 | 207 | |
|
206 | 208 | # Connect the new kernel manager. |
|
207 | 209 | kernel_manager.started_channels.connect(self._started_channels) |
|
208 | 210 | kernel_manager.stopped_channels.connect(self._stopped_channels) |
|
209 | 211 | |
|
210 | 212 | # Connect the new kernel manager's channels. |
|
211 | 213 | sub = kernel_manager.sub_channel |
|
212 | 214 | xreq = kernel_manager.xreq_channel |
|
213 | 215 | rep = kernel_manager.rep_channel |
|
214 | 216 | sub.message_received.connect(self._handle_sub) |
|
215 | 217 | xreq.execute_reply.connect(self._handle_execute_reply) |
|
216 | 218 | xreq.complete_reply.connect(self._handle_complete_reply) |
|
217 | 219 | xreq.object_info_reply.connect(self._handle_object_info_reply) |
|
218 | 220 | rep.input_requested.connect(self._handle_req) |
|
219 | 221 | |
|
220 | 222 | # Handle the case where the kernel manager started channels before |
|
221 | 223 | # we connected. |
|
222 | 224 | if kernel_manager.channels_running: |
|
223 | 225 | self._started_channels() |
|
224 | 226 | |
|
225 | 227 | kernel_manager = property(_get_kernel_manager, _set_kernel_manager) |
|
226 | 228 | |
|
227 | 229 | #--------------------------------------------------------------------------- |
|
228 | 230 | # 'FrontendWidget' protected interface |
|
229 | 231 | #--------------------------------------------------------------------------- |
|
230 | 232 | |
|
231 | 233 | def _call_tip(self): |
|
232 | 234 | """ Shows a call tip, if appropriate, at the current cursor location. |
|
233 | 235 | """ |
|
234 | 236 | # Decide if it makes sense to show a call tip |
|
235 |
cursor = self. |
|
|
237 | cursor = self._get_cursor() | |
|
236 | 238 | cursor.movePosition(QtGui.QTextCursor.Left) |
|
237 | document = self.document() | |
|
239 | document = self._control.document() | |
|
238 | 240 | if document.characterAt(cursor.position()).toAscii() != '(': |
|
239 | 241 | return False |
|
240 | 242 | context = self._get_context(cursor) |
|
241 | 243 | if not context: |
|
242 | 244 | return False |
|
243 | 245 | |
|
244 | 246 | # Send the metadata request to the kernel |
|
245 | 247 | name = '.'.join(context) |
|
246 | 248 | self._calltip_id = self.kernel_manager.xreq_channel.object_info(name) |
|
247 |
self._calltip_pos = self. |
|
|
249 | self._calltip_pos = self._get_cursor().position() | |
|
248 | 250 | return True |
|
249 | 251 | |
|
250 | 252 | def _complete(self): |
|
251 | 253 | """ Performs completion at the current cursor location. |
|
252 | 254 | """ |
|
253 | 255 | # Decide if it makes sense to do completion |
|
254 | 256 | context = self._get_context() |
|
255 | 257 | if not context: |
|
256 | 258 | return False |
|
257 | 259 | |
|
258 | 260 | # Send the completion request to the kernel |
|
259 | 261 | text = '.'.join(context) |
|
260 | 262 | self._complete_id = self.kernel_manager.xreq_channel.complete( |
|
261 | 263 | text, self.input_buffer_cursor_line, self.input_buffer) |
|
262 |
self._complete_pos = self. |
|
|
264 | self._complete_pos = self._get_cursor().position() | |
|
263 | 265 | return True |
|
264 | 266 | |
|
265 | 267 | def _get_banner(self): |
|
266 | 268 | """ Gets a banner to display at the beginning of a session. |
|
267 | 269 | """ |
|
268 | 270 | banner = 'Python %s on %s\nType "help", "copyright", "credits" or ' \ |
|
269 | 271 | '"license" for more information.' |
|
270 | 272 | return banner % (sys.version, sys.platform) |
|
271 | 273 | |
|
272 | 274 | def _get_context(self, cursor=None): |
|
273 | 275 | """ Gets the context at the current cursor location. |
|
274 | 276 | """ |
|
275 | 277 | if cursor is None: |
|
276 |
cursor = self. |
|
|
278 | cursor = self._get_cursor() | |
|
277 | 279 | cursor.movePosition(QtGui.QTextCursor.StartOfLine, |
|
278 | 280 | QtGui.QTextCursor.KeepAnchor) |
|
279 | 281 | text = str(cursor.selection().toPlainText()) |
|
280 | 282 | return self._completion_lexer.get_context(text) |
|
281 | 283 | |
|
282 | 284 | def _interrupt_kernel(self): |
|
283 | 285 | """ Attempts to the interrupt the kernel. |
|
284 | 286 | """ |
|
285 | 287 | if self.kernel_manager.has_kernel: |
|
286 | 288 | self.kernel_manager.signal_kernel(signal.SIGINT) |
|
287 | 289 | else: |
|
288 |
self.append |
|
|
289 | 'unspecified. Cannot interrupt.\n') | |
|
290 | self._append_plain_text('Kernel process is either remote or ' | |
|
291 | 'unspecified. Cannot interrupt.\n') | |
|
290 | 292 | |
|
291 | 293 | def _show_interpreter_prompt(self): |
|
292 | 294 | """ Shows a prompt for the interpreter. |
|
293 | 295 | """ |
|
294 | 296 | self._show_prompt('>>> ') |
|
295 | 297 | |
|
296 | 298 | #------ Signal handlers ---------------------------------------------------- |
|
297 | 299 | |
|
298 | 300 | def _started_channels(self): |
|
299 | 301 | """ Called when the kernel manager has started listening. |
|
300 | 302 | """ |
|
301 | 303 | self._reset() |
|
302 |
self.append |
|
|
304 | self._append_plain_text(self._get_banner()) | |
|
303 | 305 | self._show_interpreter_prompt() |
|
304 | 306 | |
|
305 | 307 | def _stopped_channels(self): |
|
306 | 308 | """ Called when the kernel manager has stopped listening. |
|
307 | 309 | """ |
|
308 | 310 | # FIXME: Print a message here? |
|
309 | 311 | pass |
|
310 | 312 | |
|
311 | 313 | def _document_contents_change(self, position, removed, added): |
|
312 | 314 | """ Called whenever the document's content changes. Display a calltip |
|
313 | 315 | if appropriate. |
|
314 | 316 | """ |
|
315 | 317 | # Calculate where the cursor should be *after* the change: |
|
316 | 318 | position += added |
|
317 | 319 | |
|
318 | document = self.document() | |
|
319 |
if position == self. |
|
|
320 | document = self._control.document() | |
|
321 | if position == self._get_cursor().position(): | |
|
320 | 322 | self._call_tip() |
|
321 | 323 | |
|
322 | 324 | def _handle_req(self, req): |
|
323 | 325 | # Make sure that all output from the SUB channel has been processed |
|
324 | 326 | # before entering readline mode. |
|
325 | 327 | self.kernel_manager.sub_channel.flush() |
|
326 | 328 | |
|
327 | 329 | def callback(line): |
|
328 | 330 | self.kernel_manager.rep_channel.input(line) |
|
329 | 331 | self._readline(req['content']['prompt'], callback=callback) |
|
330 | 332 | |
|
331 | 333 | def _handle_sub(self, omsg): |
|
332 | 334 | if self._hidden: |
|
333 | 335 | return |
|
334 | 336 | handler = getattr(self, '_handle_%s' % omsg['msg_type'], None) |
|
335 | 337 | if handler is not None: |
|
336 | 338 | handler(omsg) |
|
337 | 339 | |
|
338 | 340 | def _handle_pyout(self, omsg): |
|
339 |
self.append |
|
|
341 | self._append_plain_text(omsg['content']['data'] + '\n') | |
|
340 | 342 | |
|
341 | 343 | def _handle_stream(self, omsg): |
|
342 |
self.append |
|
|
343 | self.moveCursor(QtGui.QTextCursor.End) | |
|
344 | self._append_plain_text(omsg['content']['data']) | |
|
345 | self._control.moveCursor(QtGui.QTextCursor.End) | |
|
344 | 346 | |
|
345 | 347 | def _handle_execute_reply(self, reply): |
|
346 | 348 | if self._hidden: |
|
347 | 349 | return |
|
348 | 350 | |
|
349 | 351 | # Make sure that all output from the SUB channel has been processed |
|
350 | 352 | # before writing a new prompt. |
|
351 | 353 | self.kernel_manager.sub_channel.flush() |
|
352 | 354 | |
|
353 | 355 | status = reply['content']['status'] |
|
354 | 356 | if status == 'error': |
|
355 | 357 | self._handle_execute_error(reply) |
|
356 | 358 | elif status == 'aborted': |
|
357 | 359 | text = "ERROR: ABORTED\n" |
|
358 |
self.append |
|
|
360 | self._append_plain_text(text) | |
|
359 | 361 | self._hidden = True |
|
360 | 362 | self._show_interpreter_prompt() |
|
361 | 363 | self.executed.emit(reply) |
|
362 | 364 | |
|
363 | 365 | def _handle_execute_error(self, reply): |
|
364 | 366 | content = reply['content'] |
|
365 | 367 | traceback = ''.join(content['traceback']) |
|
366 |
self.append |
|
|
368 | self._append_plain_text(traceback) | |
|
367 | 369 | |
|
368 | 370 | def _handle_complete_reply(self, rep): |
|
369 |
cursor = self. |
|
|
371 | cursor = self._get_cursor() | |
|
370 | 372 | if rep['parent_header']['msg_id'] == self._complete_id and \ |
|
371 | 373 | cursor.position() == self._complete_pos: |
|
372 | 374 | text = '.'.join(self._get_context()) |
|
373 | 375 | cursor.movePosition(QtGui.QTextCursor.Left, n=len(text)) |
|
374 | 376 | self._complete_with_items(cursor, rep['content']['matches']) |
|
375 | 377 | |
|
376 | 378 | def _handle_object_info_reply(self, rep): |
|
377 |
cursor = self. |
|
|
379 | cursor = self._get_cursor() | |
|
378 | 380 | if rep['parent_header']['msg_id'] == self._calltip_id and \ |
|
379 | 381 | cursor.position() == self._calltip_pos: |
|
380 | 382 | doc = rep['content']['docstring'] |
|
381 | 383 | if doc: |
|
382 | 384 | self._call_tip_widget.show_docstring(doc) |
@@ -1,206 +1,206 | |||
|
1 | 1 | # System library imports |
|
2 | 2 | from PyQt4 import QtCore, QtGui |
|
3 | 3 | |
|
4 | 4 | # Local imports |
|
5 | 5 | from IPython.core.usage import default_banner |
|
6 | 6 | from frontend_widget import FrontendWidget |
|
7 | 7 | |
|
8 | 8 | |
|
9 | 9 | class IPythonWidget(FrontendWidget): |
|
10 | 10 | """ A FrontendWidget for an IPython kernel. |
|
11 | 11 | """ |
|
12 | 12 | |
|
13 | 13 | # The default stylesheet: black text on a white background. |
|
14 | 14 | default_stylesheet = """ |
|
15 | 15 | .error { color: red; } |
|
16 | 16 | .in-prompt { color: navy; } |
|
17 | 17 | .in-prompt-number { font-weight: bold; } |
|
18 | 18 | .out-prompt { color: darkred; } |
|
19 | 19 | .out-prompt-number { font-weight: bold; } |
|
20 | 20 | """ |
|
21 | 21 | |
|
22 | 22 | # A dark stylesheet: white text on a black background. |
|
23 | 23 | dark_stylesheet = """ |
|
24 | 24 | QPlainTextEdit { background-color: black; color: white } |
|
25 | 25 | QFrame { border: 1px solid grey; } |
|
26 | 26 | .error { color: red; } |
|
27 | 27 | .in-prompt { color: lime; } |
|
28 | 28 | .in-prompt-number { color: lime; font-weight: bold; } |
|
29 | 29 | .out-prompt { color: red; } |
|
30 | 30 | .out-prompt-number { color: red; font-weight: bold; } |
|
31 | 31 | """ |
|
32 | 32 | |
|
33 | 33 | # Default prompts. |
|
34 | 34 | in_prompt = '<br/>In [<span class="in-prompt-number">%i</span>]: ' |
|
35 | 35 | out_prompt = 'Out[<span class="out-prompt-number">%i</span>]: ' |
|
36 | 36 | |
|
37 | 37 | #--------------------------------------------------------------------------- |
|
38 |
# ' |
|
|
38 | # 'object' interface | |
|
39 | 39 | #--------------------------------------------------------------------------- |
|
40 | 40 | |
|
41 |
def __init__(self, |
|
|
42 |
super(IPythonWidget, self).__init__( |
|
|
41 | def __init__(self, *args, **kw): | |
|
42 | super(IPythonWidget, self).__init__(*args, **kw) | |
|
43 | 43 | |
|
44 | 44 | # Initialize protected variables. |
|
45 | 45 | self._previous_prompt_blocks = [] |
|
46 | 46 | self._prompt_count = 0 |
|
47 | 47 | |
|
48 | 48 | # Set a default stylesheet. |
|
49 | 49 | self.reset_styling() |
|
50 | 50 | |
|
51 | 51 | #--------------------------------------------------------------------------- |
|
52 | 52 | # 'FrontendWidget' interface |
|
53 | 53 | #--------------------------------------------------------------------------- |
|
54 | 54 | |
|
55 | 55 | def execute_file(self, path, hidden=False): |
|
56 | 56 | """ Reimplemented to use the 'run' magic. |
|
57 | 57 | """ |
|
58 | 58 | self.execute('run %s' % path, hidden=hidden) |
|
59 | 59 | |
|
60 | 60 | #--------------------------------------------------------------------------- |
|
61 | 61 | # 'FrontendWidget' protected interface |
|
62 | 62 | #--------------------------------------------------------------------------- |
|
63 | 63 | |
|
64 | 64 | def _get_banner(self): |
|
65 | 65 | """ Reimplemented to return IPython's default banner. |
|
66 | 66 | """ |
|
67 | 67 | return default_banner |
|
68 | 68 | |
|
69 | 69 | def _show_interpreter_prompt(self): |
|
70 | 70 | """ Reimplemented for IPython-style prompts. |
|
71 | 71 | """ |
|
72 | 72 | # Update old prompt numbers if necessary. |
|
73 | 73 | previous_prompt_number = self._prompt_count |
|
74 | 74 | if previous_prompt_number != self._prompt_count: |
|
75 | 75 | for i, (block, length) in enumerate(self._previous_prompt_blocks): |
|
76 | 76 | if block.isValid(): |
|
77 | 77 | cursor = QtGui.QTextCursor(block) |
|
78 | 78 | cursor.movePosition(QtGui.QTextCursor.Right, |
|
79 | 79 | QtGui.QTextCursor.KeepAnchor, length-1) |
|
80 | 80 | if i == 0: |
|
81 | 81 | prompt = self._make_in_prompt(previous_prompt_number) |
|
82 | 82 | else: |
|
83 | 83 | prompt = self._make_out_prompt(previous_prompt_number) |
|
84 | 84 | self._insert_html(cursor, prompt) |
|
85 | 85 | self._previous_prompt_blocks = [] |
|
86 | 86 | |
|
87 | 87 | # Show a new prompt. |
|
88 | 88 | self._prompt_count += 1 |
|
89 | 89 | self._show_prompt(self._make_in_prompt(self._prompt_count), html=True) |
|
90 | 90 | self._save_prompt_block() |
|
91 | 91 | |
|
92 | 92 | # Update continuation prompt to reflect (possibly) new prompt length. |
|
93 | 93 | self._set_continuation_prompt( |
|
94 | 94 | self._make_continuation_prompt(self._prompt), html=True) |
|
95 | 95 | |
|
96 | 96 | #------ Signal handlers ---------------------------------------------------- |
|
97 | 97 | |
|
98 | 98 | def _handle_execute_error(self, reply): |
|
99 | 99 | """ Reimplemented for IPython-style traceback formatting. |
|
100 | 100 | """ |
|
101 | 101 | content = reply['content'] |
|
102 | 102 | traceback_lines = content['traceback'][:] |
|
103 | 103 | traceback = ''.join(traceback_lines) |
|
104 | 104 | traceback = traceback.replace(' ', ' ') |
|
105 | 105 | traceback = traceback.replace('\n', '<br/>') |
|
106 | 106 | |
|
107 | 107 | ename = content['ename'] |
|
108 | 108 | ename_styled = '<span class="error">%s</span>' % ename |
|
109 | 109 | traceback = traceback.replace(ename, ename_styled) |
|
110 | 110 | |
|
111 |
self.append |
|
|
111 | self._append_html(traceback) | |
|
112 | 112 | |
|
113 | 113 | def _handle_pyout(self, omsg): |
|
114 | 114 | """ Reimplemented for IPython-style "display hook". |
|
115 | 115 | """ |
|
116 |
self.append |
|
|
116 | self._append_html(self._make_out_prompt(self._prompt_count)) | |
|
117 | 117 | self._save_prompt_block() |
|
118 | 118 | |
|
119 |
self.append |
|
|
119 | self._append_plain_text(omsg['content']['data'] + '\n') | |
|
120 | 120 | |
|
121 | 121 | #--------------------------------------------------------------------------- |
|
122 | 122 | # 'IPythonWidget' interface |
|
123 | 123 | #--------------------------------------------------------------------------- |
|
124 | 124 | |
|
125 | 125 | def reset_styling(self): |
|
126 | 126 | """ Restores the default IPythonWidget styling. |
|
127 | 127 | """ |
|
128 | 128 | self.set_styling(self.default_stylesheet, syntax_style='default') |
|
129 | 129 | #self.set_styling(self.dark_stylesheet, syntax_style='monokai') |
|
130 | 130 | |
|
131 | 131 | def set_styling(self, stylesheet, syntax_style=None): |
|
132 | 132 | """ Sets the IPythonWidget styling. |
|
133 | 133 | |
|
134 | 134 | Parameters: |
|
135 | 135 | ----------- |
|
136 | 136 | stylesheet : str |
|
137 | 137 | A CSS stylesheet. The stylesheet can contain classes for: |
|
138 | 138 | 1. Qt: QPlainTextEdit, QFrame, QWidget, etc |
|
139 | 139 | 2. Pygments: .c, .k, .o, etc (see PygmentsHighlighter) |
|
140 | 140 | 3. IPython: .error, .in-prompt, .out-prompt, etc. |
|
141 | 141 | |
|
142 | 142 | syntax_style : str or None [default None] |
|
143 | 143 | If specified, use the Pygments style with given name. Otherwise, |
|
144 | 144 | the stylesheet is queried for Pygments style information. |
|
145 | 145 | """ |
|
146 | 146 | self.setStyleSheet(stylesheet) |
|
147 | self.document().setDefaultStyleSheet(stylesheet) | |
|
147 | self._control.document().setDefaultStyleSheet(stylesheet) | |
|
148 | 148 | |
|
149 | 149 | if syntax_style is None: |
|
150 | 150 | self._highlighter.set_style_sheet(stylesheet) |
|
151 | 151 | else: |
|
152 | 152 | self._highlighter.set_style(syntax_style) |
|
153 | 153 | |
|
154 | 154 | #--------------------------------------------------------------------------- |
|
155 | 155 | # 'IPythonWidget' protected interface |
|
156 | 156 | #--------------------------------------------------------------------------- |
|
157 | 157 | |
|
158 | 158 | def _make_in_prompt(self, number): |
|
159 | 159 | """ Given a prompt number, returns an HTML In prompt. |
|
160 | 160 | """ |
|
161 | 161 | body = self.in_prompt % number |
|
162 | 162 | return '<span class="in-prompt">%s</span>' % body |
|
163 | 163 | |
|
164 | 164 | def _make_continuation_prompt(self, prompt): |
|
165 | 165 | """ Given a plain text version of an In prompt, returns an HTML |
|
166 | 166 | continuation prompt. |
|
167 | 167 | """ |
|
168 | 168 | end_chars = '...: ' |
|
169 | 169 | space_count = len(prompt.lstrip('\n')) - len(end_chars) |
|
170 | 170 | body = ' ' * space_count + end_chars |
|
171 | 171 | return '<span class="in-prompt">%s</span>' % body |
|
172 | 172 | |
|
173 | 173 | def _make_out_prompt(self, number): |
|
174 | 174 | """ Given a prompt number, returns an HTML Out prompt. |
|
175 | 175 | """ |
|
176 | 176 | body = self.out_prompt % number |
|
177 | 177 | return '<span class="out-prompt">%s</span>' % body |
|
178 | 178 | |
|
179 | 179 | def _save_prompt_block(self): |
|
180 | 180 | """ Assuming a prompt has just been written at the end of the buffer, |
|
181 | 181 | store the QTextBlock that contains it and its length. |
|
182 | 182 | """ |
|
183 | block = self.document().lastBlock() | |
|
183 | block = self._control.document().lastBlock() | |
|
184 | 184 | self._previous_prompt_blocks.append((block, block.length())) |
|
185 | 185 | |
|
186 | 186 | |
|
187 | 187 | if __name__ == '__main__': |
|
188 | 188 | from IPython.frontend.qt.kernelmanager import QtKernelManager |
|
189 | 189 | |
|
190 | 190 | # Don't let Qt or ZMQ swallow KeyboardInterupts. |
|
191 | 191 | import signal |
|
192 | 192 | signal.signal(signal.SIGINT, signal.SIG_DFL) |
|
193 | 193 | |
|
194 | 194 | # Create a KernelManager. |
|
195 | 195 | kernel_manager = QtKernelManager() |
|
196 | 196 | kernel_manager.start_kernel() |
|
197 | 197 | kernel_manager.start_channels() |
|
198 | 198 | |
|
199 | 199 | # Launch the application. |
|
200 | 200 | app = QtGui.QApplication([]) |
|
201 | 201 | widget = IPythonWidget() |
|
202 | 202 | widget.kernel_manager = kernel_manager |
|
203 | 203 | widget.setWindowTitle('Python') |
|
204 | 204 | widget.resize(640, 480) |
|
205 | 205 | widget.show() |
|
206 | 206 | app.exec_() |
General Comments 0
You need to be logged in to leave comments.
Login now