1 /* This file is part of
2 * ======================================================
4 * LyX, The Document Processor
6 * Copyright 1995 Matthias Ettrich
7 * Copyright 1995-1998 The LyX Team
9 * ====================================================== */
14 #pragma implementation "lyxscreen.h"
19 #include "lyxscreen.h"
26 #include "insets/insettext.h"
35 val.foreground = BlackPixel(fl_get_display(),
36 DefaultScreen(fl_get_display()));
39 val.graphics_exposures = false;
40 val.line_style = LineSolid;
42 return XCreateGC(fl_get_display(), RootWindow(fl_get_display(), 0),
43 GCForeground | GCFunction | GCGraphicsExposures
44 | GCLineWidth | GCLineStyle , &val);
49 LyXScreen::LyXScreen(WorkArea & o) //, LyXText * text_ptr)
50 : owner(o), force_clear(true) //, text(text_ptr)
52 // the cursor isnt yet visible
53 cursor_visible = false;
65 void LyXScreen::Redraw(LyXText * text)
67 DrawFromTo(text, 0, owner.height());
68 expose(0, 0, owner.workWidth(), owner.height());
70 cursor_visible = false;
76 void LyXScreen::expose(int x, int y, int exp_width, int exp_height)
78 XCopyArea(fl_get_display(),
83 exp_width, exp_height,
89 void LyXScreen::DrawFromTo(LyXText * text,
90 int y1, int y2, int y_offset, int x_offset)
92 int y_text = text->first + y1;
94 // get the first needed row
95 Row * row = text->GetRowNearY(y_text);
96 // y_text is now the real beginning of the row
98 int y = y_text - text->first;
99 // y1 is now the real beginning of row on the screen
101 while (row != 0 && y < y2) {
102 LyXText::text_status st = text->status;
105 text->GetVisibleRow(owner.owner(), y+y_offset,
106 x_offset, row, y + text->first);
107 } while (text->status == LyXText::CHANGED_IN_DRAW);
114 // maybe we have to clear the screen at the bottom
115 if ((y < y2) && text->bv_owner) {
116 owner.getPainter().fillRectangle(0, y,
124 void LyXScreen::DrawOneRow(LyXText * text, Row * row, int y_text,
125 int y_offset, int x_offset)
127 int y = y_text - text->first + y_offset;
129 if (((y + row->height()) > 0) &&
130 ((y - row->height()) <= static_cast<int>(owner.height()))) {
131 // ok there is something visible
132 LyXText::text_status st = text->status;
135 text->GetVisibleRow(owner.owner(), y, x_offset, row,
137 } while (text->status == LyXText::CHANGED_IN_DRAW);
144 /* draws the screen, starting with textposition y. uses as much already
145 * printed pixels as possible */
146 void LyXScreen::Draw(LyXText * text, unsigned int y)
148 if (cursor_visible) HideCursor();
150 int old_first = text->first;
153 // is any optimiziation possible?
154 if ((y - old_first) < owner.height()
155 && (old_first - y) < owner.height()) {
156 if (text->first < old_first) {
157 DrawFromTo(text, 0, old_first - text->first);
158 XCopyArea (fl_get_display(),
165 owner.height() - old_first + text->first,
167 owner.ypos() + old_first - text->first
169 // expose the area drawn
172 old_first - text->first);
175 owner.height() + old_first - text->first,
177 XCopyArea (fl_get_display(),
182 owner.ypos() + text->first - old_first,
184 owner.height() + old_first - text->first,
187 // expose the area drawn
188 expose(0, owner.height() + old_first - text->first,
189 owner.workWidth(), text->first - old_first);
192 // make a dumb new-draw
193 DrawFromTo(text, 0, owner.height());
194 expose(0, 0, owner.workWidth(), owner.height());
199 void LyXScreen::ShowCursor(LyXText const * text)
201 if (!cursor_visible) {
202 Cursor_Shape shape = BAR_SHAPE;
203 if (text->real_current_font.language() !=
204 owner.owner()->buffer()->params.language
205 || text->real_current_font.isVisibleRightToLeft()
206 != owner.owner()->buffer()->params.language->RightToLeft())
207 shape = (text->real_current_font.isVisibleRightToLeft())
208 ? REVERSED_L_SHAPE : L_SHAPE;
209 ShowManualCursor(text, text->cursor.x(), text->cursor.y(),
210 lyxfont::maxAscent(text->real_current_font),
211 lyxfont::maxDescent(text->real_current_font),
217 /* returns true if first has changed, otherwise false */
218 bool LyXScreen::FitManualCursor(LyXText * text,
219 int /*x*/, int y, int asc, int desc)
221 int newtop = text->first;
223 if (y + desc - text->first >= static_cast<int>(owner.height()))
224 newtop = y - 3 * owner.height() / 4; // the scroll region must be so big!!
225 else if (y - asc < static_cast<int>(text->first)
226 && text->first > 0) {
227 newtop = y - owner.height() / 4;
230 newtop = max(newtop, 0); // can newtop ever be < 0? (Lgb)
232 if (newtop != static_cast<int>(text->first)) {
234 text->first = newtop;
241 void LyXScreen::ShowManualCursor(LyXText const * text, int x, int y,
242 int asc, int desc, Cursor_Shape shape)
244 int y1 = max(y - text->first - asc, 0);
245 int y2 = min(y - text->first + desc, static_cast<int>(owner.height()));
247 // Secure against very strange situations
251 XFreePixmap(fl_get_display(), cursor_pixmap);
255 if (y2 > 0 && y1 < int(owner.height())) {
256 cursor_pixmap_h = y2 - y1 + 1;
257 cursor_pixmap_y = y1;
265 cursor_pixmap_w = cursor_pixmap_h/3;
268 case REVERSED_L_SHAPE:
269 cursor_pixmap_w = cursor_pixmap_h/3;
270 cursor_pixmap_x = x - cursor_pixmap_w + 1;
275 XCreatePixmap (fl_get_display(),
279 fl_get_visual_depth());
280 XCopyArea (fl_get_display(),
284 owner.xpos() + cursor_pixmap_x,
285 owner.ypos() + cursor_pixmap_y,
289 XDrawLine(fl_get_display(),
300 case REVERSED_L_SHAPE:
301 int rectangle_h = (cursor_pixmap_h+10)/20;
302 XFillRectangle(fl_get_display(),
305 cursor_pixmap_x + owner.xpos(),
306 y2 - rectangle_h + 1 + owner.ypos(),
307 cursor_pixmap_w - 1, rectangle_h);
312 cursor_visible = true;
316 void LyXScreen::HideCursor()
318 if (!cursor_visible) return;
321 XCopyArea (fl_get_display(),
326 cursor_pixmap_w, cursor_pixmap_h,
327 cursor_pixmap_x + owner.xpos(),
328 cursor_pixmap_y + owner.ypos());
330 cursor_visible = false;
334 void LyXScreen::CursorToggle(LyXText const * text)
343 /* returns a new top so that the cursor is visible */
344 unsigned int LyXScreen::TopCursorVisible(LyXText const * text)
346 int newtop = text->first;
349 - text->cursor.row()->baseline()
350 + text->cursor.row()->height()
351 - text->first >= owner.height()) {
352 if (text->cursor.row()->height() < owner.height()
353 && text->cursor.row()->height() > owner.height() / 4)
354 newtop = text->cursor.y()
355 + text->cursor.row()->height()
356 - text->cursor.row()->baseline() - owner.height();
358 newtop = text->cursor.y()
359 - 3 * owner.height() / 4; /* the scroll region must be so big!! */
360 } else if (static_cast<int>((text->cursor.y()) - text->cursor.row()->baseline()) <
361 text->first && text->first > 0)
363 if (text->cursor.row()->height() < owner.height()
364 && text->cursor.row()->height() > owner.height() / 4)
365 newtop = text->cursor.y() - text->cursor.row()->baseline();
367 newtop = text->cursor.y() - owner.height() / 4;
368 newtop = min(newtop, int(text->first));
372 newtop = max(newtop, 0);
378 /* scrolls the screen so that the cursor is visible, if necessary.
379 * returns true if a change was made, otherwise false */
380 bool LyXScreen::FitCursor(LyXText * text)
382 // Is a change necessary?
383 int newtop = TopCursorVisible(text);
384 bool result = (newtop != text->first);
391 void LyXScreen::Update(LyXText * text, int y_offset, int x_offset)
393 switch (text->status) {
394 case LyXText::NEED_MORE_REFRESH:
396 int y = max(int(text->refresh_y - text->first), 0);
397 DrawFromTo(text, y, owner.height(), y_offset, x_offset);
399 text->status = LyXText::UNCHANGED;
400 expose(0, y, owner.workWidth(), owner.height() - y);
403 case LyXText::NEED_VERY_LITTLE_REFRESH:
405 // ok I will update the current cursor row
406 DrawOneRow(text, text->refresh_row, text->refresh_y,
408 text->status = LyXText::UNCHANGED;
409 expose(0, text->refresh_y - text->first + y_offset,
410 owner.workWidth(), text->refresh_row->height());
413 case LyXText::CHANGED_IN_DRAW: // just to remove the warning
414 case LyXText::UNCHANGED:
415 // Nothing needs done
421 void LyXScreen::ToggleSelection(LyXText * text, bool kill_selection,
422 int y_offset, int x_offset)
424 // only if there is a selection
425 if (!text->selection) return;
427 int bottom = min(max(static_cast<int>(text->sel_end_cursor.y()
428 - text->sel_end_cursor.row()->baseline()
429 + text->sel_end_cursor.row()->height()),
431 static_cast<int>(text->first + owner.height()));
432 int top = min(max(static_cast<int>(text->sel_start_cursor.y() -
433 text->sel_start_cursor.row()->baseline()),
435 static_cast<int>(text->first + owner.height()));
439 DrawFromTo(text, top - text->first, bottom - text->first,
441 expose(0, top - text->first,
443 bottom - text->first - (top - text->first));
447 void LyXScreen::ToggleToggle(LyXText * text, int y_offset, int x_offset)
449 if (text->toggle_cursor.par() == text->toggle_end_cursor.par()
450 && text->toggle_cursor.pos() == text->toggle_end_cursor.pos())
453 int top = text->toggle_cursor.y()
454 - text->toggle_cursor.row()->baseline();
455 int bottom = text->toggle_end_cursor.y()
456 - text->toggle_end_cursor.row()->baseline()
457 + text->toggle_end_cursor.row()->height();
459 bottom = min(max(bottom, text->first),
460 static_cast<int>(text->first + owner.height()));
461 top = min(max(top, text->first),
462 static_cast<int>(text->first + owner.height()));
464 DrawFromTo(text, top - text->first, bottom - text->first, y_offset,
466 expose(0, top - text->first, owner.workWidth(),
467 bottom - text->first - (top - text->first));