]> git.lyx.org Git - lyx.git/blob - src/frontends/WorkArea.C
Fix singlePar update. This should result in a nice speed improvment for Mac.
[lyx.git] / src / frontends / WorkArea.C
1 /**
2  * \file WorkArea.C
3  * This file is part of LyX, the document processor.
4  * Licence details can be found in the file COPYING.
5  *
6  * \author John Levon
7  * \author Abdelrazak Younes
8  *
9  * Full author contact details are available in file CREDITS.
10  *
11  * Splash screen code added by Angus Leeming
12  */
13
14 #include <config.h>
15
16 #include "frontends/WorkArea.h"
17
18 #include "frontends/Application.h"
19 #include "frontends/FontMetrics.h"
20
21 #include "funcrequest.h"
22 #include "lyxfunc.h"
23 #include "Painter.h"
24
25 #include "BufferView.h"
26 #include "buffer.h"
27 #include "bufferparams.h"
28 #include "coordcache.h"
29 #include "cursor.h"
30 #include "debug.h"
31 #include "language.h"
32 #include "LColor.h"
33 #include "lyxfont.h"
34 #include "lyxrc.h"
35 #include "lyxrow.h"
36 #include "lyxtext.h"
37 #include "LyXView.h"
38 #include "metricsinfo.h"
39 #include "paragraph.h"
40 #include "rowpainter.h"
41
42 #include "gettext.h"
43 #include "support/filetools.h" // LibFileSearch
44 #include "support/forkedcontr.h"
45
46 #include <boost/utility.hpp>
47 #include <boost/bind.hpp>
48 #include <boost/current_function.hpp>
49
50 using lyx::support::libFileSearch;
51 using lyx::support::ForkedcallsController;
52
53 using std::endl;
54 using std::min;
55 using std::max;
56 using std::string;
57
58
59 namespace {
60
61 // All the below connection objects are needed because of a bug in some
62 // versions of GCC (<=2.96 are on the suspects list.) By having and assigning
63 // to these connections we avoid a segfault upon startup, and also at exit.
64 // (Lgb)
65
66 boost::signals::connection timecon;
67
68 } // anon namespace
69
70 namespace lyx {
71 namespace frontend {
72
73 WorkArea::WorkArea(int id, LyXView & lyx_view)
74         : buffer_view_(0), lyx_view_(lyx_view), greyed_out_(true),
75           id_(id), cursor_visible_(false), cursor_timeout_(400)
76 {
77         // Start loading the pixmap as soon as possible
78         //if (lyxrc.show_banner) {
79         //      showBanner();
80         //}
81
82         // Setup the signals
83         timecon = cursor_timeout_.timeout
84                 .connect(boost::bind(&WorkArea::toggleCursor, this));
85
86         cursor_timeout_.start();
87 }
88
89
90 void WorkArea::setBufferView(BufferView * buffer_view)
91 {
92         if (buffer_view_) {
93                 message_connection_.disconnect();
94                 lyx_view_.disconnectBufferView();
95         }
96
97         theApp->setBufferView(buffer_view);
98
99         hideCursor();
100         buffer_view_ = buffer_view;
101         toggleCursor();
102
103         message_connection_ = buffer_view_->message.connect(
104                         boost::bind(&WorkArea::displayMessage, this, _1));
105
106         lyx_view_.connectBufferView(*buffer_view);
107 }
108
109
110 BufferView & WorkArea::bufferView()
111 {
112         return *buffer_view_;
113 }
114
115
116 BufferView const & WorkArea::bufferView() const
117 {
118         return *buffer_view_;
119 }
120
121
122 void WorkArea::stopBlinkingCursor()
123 {
124         cursor_timeout_.stop();
125 }
126
127
128 void WorkArea::startBlinkingCursor()
129 {
130         cursor_timeout_.restart();
131 }
132
133
134 void WorkArea::checkAndGreyOut()
135 {
136         if (greyed_out_)
137                 greyOut();
138 }
139
140
141 void WorkArea::redraw(bool singlePar)
142 {
143         if (!buffer_view_)
144                 return;
145
146         if (!buffer_view_->buffer()) {
147                 checkAndGreyOut();
148                 return;
149         }
150
151         buffer_view_->updateMetrics(singlePar);
152
153         updateScrollbar();
154
155         ViewMetricsInfo const & vi = buffer_view_->viewMetricsInfo();
156         greyed_out_ = false;
157
158         lyxerr[Debug::WORKAREA] << "WorkArea::redraw screen" << endl;
159         int const ymin = std::max(vi.y1, 0);
160         int const ymax = vi.p2 < vi.size - 1 ? vi.y2 : height();
161
162         expose(0, ymin, width(), ymax - ymin);
163
164         //lyxerr[Debug::WORKAREA]
165         //<< "  ymin = " << ymin << "  width() = " << width()
166 //              << "  ymax-ymin = " << ymax-ymin << std::endl;
167
168         if (lyxerr.debugging(Debug::WORKAREA))
169                 buffer_view_->coordCache().dump();
170 }
171
172
173 void WorkArea::processKeySym(LyXKeySymPtr key,
174                                                          key_modifier::state state)
175 {
176         hideCursor();
177
178         theLyXFunc().setLyXView(&lyx_view_);
179         theLyXFunc().processKeySym(key, state);
180
181         /* This is perhaps a bit of a hack. When we move
182          * around, or type, it's nice to be able to see
183          * the cursor immediately after the keypress. So
184          * we reset the toggle timeout and force the visibility
185          * of the cursor. Note we cannot do this inside
186          * dispatch() itself, because that's called recursively.
187          */
188 //      if (buffer_view_->buffer())
189         toggleCursor();
190 }
191
192
193 void WorkArea::dispatch(FuncRequest const & cmd0)
194 {
195         // Handle drag&drop
196         if (cmd0.action == LFUN_FILE_OPEN) {
197                 lyx_view_.dispatch(cmd0);
198                 return;
199         }
200
201         theLyXFunc().setLyXView(&lyx_view_);
202
203         buffer_view_->workAreaDispatch(cmd0);
204
205         // Skip these when selecting
206         if (cmd0.action != LFUN_MOUSE_MOTION) {
207                 lyx_view_.updateLayoutChoice();
208                 lyx_view_.updateMenubar();
209                 lyx_view_.updateToolbars();
210         }
211
212         // Slight hack: this is only called currently when we
213         // clicked somewhere, so we force through the display
214         // of the new status here.
215         lyx_view_.clearMessage();
216
217         redraw();
218 }
219
220
221 void WorkArea::resizeBufferView()
222 {
223         lyx_view_.busy(true);
224         lyx_view_.message(_("Formatting document..."));
225         buffer_view_->workAreaResize(width(), height());
226         lyx_view_.updateLayoutChoice();
227         redraw();
228         lyx_view_.busy(false);
229         lyx_view_.clearMessage();
230 }
231
232
233 void WorkArea::updateScrollbar()
234 {
235         buffer_view_->updateScrollbar(); 
236         ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
237         setScrollbarParams(scroll_.height, scroll_.position,
238                 scroll_.lineScrollHeight);
239 }
240
241
242 void WorkArea::scrollBufferView(int position)
243 {
244         buffer_view_->scrollDocView(position);
245         redraw();
246         hideCursor();
247         if (lyxrc.cursor_follows_scrollbar) {
248                 buffer_view_->setCursorFromScrollbar();
249                 lyx_view_.updateLayoutChoice();
250         }
251         toggleCursor();
252 }
253
254
255 void WorkArea::greyOut()
256 {
257         greyed_out_ = true;
258         expose(4, 5, 3, 3);
259 }
260
261
262 void WorkArea::showCursor()
263 {
264         if (cursor_visible_)
265                 return;
266
267         if (!buffer_view_->buffer())
268                 return;
269
270         CursorShape shape = BAR_SHAPE;
271
272         LyXText const & text = *buffer_view_->getLyXText();
273         LyXFont const & realfont = text.real_current_font;
274         BufferParams const & bp = buffer_view_->buffer()->params();
275         bool const samelang = realfont.language() == bp.language;
276         bool const isrtl = realfont.isVisibleRightToLeft();
277
278         if (!samelang || isrtl != bp.language->rightToLeft()) {
279                 shape = L_SHAPE;
280                 if (isrtl)
281                         shape = REVERSED_L_SHAPE;
282         }
283
284         // The ERT language hack needs fixing up
285         if (realfont.language() == latex_language)
286                 shape = BAR_SHAPE;
287
288         LyXFont const font = buffer_view_->cursor().getFont();
289         FontMetrics const & fm = theFontMetrics(font);
290         int const asc = fm.maxAscent();
291         int const des = fm.maxDescent();
292         int h = asc + des;
293         int x = 0;
294         int y = 0;
295         buffer_view_->cursor().getPos(x, y);
296         y -= asc;
297
298         // if it doesn't touch the screen, don't try to show it
299         if (y + h < 0 || y >= height())
300                 return;
301
302         cursor_visible_ = true;
303         showCursor(x, y, h, shape);
304 }
305
306
307 void WorkArea::hideCursor()
308 {
309         if (!cursor_visible_)
310                 return;
311
312         cursor_visible_ = false;
313         removeCursor();
314 }
315
316
317 void WorkArea::toggleCursor()
318 {
319         if (buffer_view_->buffer()) {
320
321                 if (cursor_visible_)
322                         hideCursor();
323                 else
324                         showCursor();
325
326                 // Use this opportunity to deal with any child processes that
327                 // have finished but are waiting to communicate this fact
328                 // to the rest of LyX.
329                 ForkedcallsController & fcc = ForkedcallsController::get();
330                 fcc.handleCompletedProcesses();
331         }
332
333         cursor_timeout_.restart();
334 }
335
336
337 void WorkArea::displayMessage(lyx::docstring const & message)
338 {
339         lyx_view_.message(message);
340 }
341
342 } // namespace frontend
343 } // namespace lyx