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"
34 val.foreground = BlackPixel(fl_display,
35 DefaultScreen(fl_display));
38 val.graphics_exposures = false;
39 val.line_style = LineSolid;
41 return XCreateGC(fl_display, RootWindow(fl_display, 0),
42 GCForeground | GCFunction | GCGraphicsExposures
43 | GCLineWidth | GCLineStyle , &val);
48 LyXScreen::LyXScreen(WorkArea & o, LyXText * text_ptr)
49 : owner(o), text(text_ptr)
53 // the cursor isnt yet visible
54 cursor_visible = false;
66 void LyXScreen::Redraw()
68 DrawFromTo(0, owner.height());
69 expose(0, 0, owner.workWidth(), owner.height());
71 cursor_visible = false;
77 void LyXScreen::expose(int x, int y, int exp_width, int exp_height)
84 exp_width, exp_height,
90 void LyXScreen::DrawFromTo(int y1, int y2)
92 long y_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 long y = y_text - first;
99 // y1 is now the real beginning of row on the screen
101 while (row != 0 && y < y2) {
102 text->GetVisibleRow(y, row, y + first);
107 // maybe we have to clear the screen at the bottom
109 owner.getPainter().fillRectangle(0, y,
117 void LyXScreen::DrawOneRow(Row * row, long y_text)
119 long y = y_text - first;
121 if (y + row->height > 0 && y - row->height <= long(owner.height())) {
122 // ok there is something visible
123 text->GetVisibleRow(y, row, y + first);
128 /* draws the screen, starting with textposition y. uses as much already
129 * printed pixels as possible */
130 void LyXScreen::Draw(unsigned long y)
132 if (cursor_visible) HideCursor();
134 unsigned long old_first = first;
137 // is any optimiziation possible?
138 if ((y - old_first) < owner.height()
139 && (old_first - y) < owner.height()) {
140 if (first < old_first) {
141 DrawFromTo(0, old_first - first);
142 XCopyArea (fl_display,
149 owner.height() - old_first + first,
151 owner.ypos() + old_first - first
153 // expose the area drawn
159 owner.height() + old_first - first,
161 XCopyArea (fl_display,
166 owner.ypos() + first - old_first,
168 owner.height() + old_first - first,
171 // expose the area drawn
172 expose(0, owner.height() + old_first - first,
173 owner.workWidth(), first - old_first);
176 // make a dumb new-draw
177 DrawFromTo(0, owner.height());
178 expose(0, 0, owner.workWidth(), owner.height());
183 void LyXScreen::ShowCursor()
185 if (!cursor_visible) {
186 Cursor_Shape shape = BAR_SHAPE;
187 if (text->real_current_font.language() !=
188 text->buffer->params.language_info
189 || text->real_current_font.isVisibleRightToLeft()
190 != text->buffer->params.language_info->RightToLeft)
191 shape = (text->real_current_font.isVisibleRightToLeft())
192 ? REVERSED_L_SHAPE : L_SHAPE;
193 ShowManualCursor(text->cursor.x, text->cursor.y,
194 lyxfont::maxAscent(text->real_current_font),
195 lyxfont::maxDescent(text->real_current_font),
201 /* returns true if first has changed, otherwise false */
202 bool LyXScreen::FitManualCursor(long /*x*/, long y, int asc, int desc)
206 if (y + desc - first >= owner.height())
207 newtop = y - 3 * owner.height() / 4; // the scroll region must be so big!!
208 else if (y - asc < long(first)
210 newtop = y - owner.height() / 4;
213 newtop = max(newtop, 0L); // can newtop ever be < 0? (Lgb)
215 if (newtop != long(first)) {
224 void LyXScreen::ShowManualCursor(long x, long y, int asc, int desc,
227 unsigned long y1 = max(y - first - asc, 0UL);
228 typedef unsigned long ulong;
230 unsigned long y2 = min(y - first + desc, ulong(owner.height()));
232 // Secure against very strange situations
236 XFreePixmap(fl_display, cursor_pixmap);
240 if (y2 > 0 && y1 < owner.height()) {
241 cursor_pixmap_h = y2 - y1 + 1;
242 cursor_pixmap_y = y1;
250 cursor_pixmap_w = cursor_pixmap_h/3;
253 case REVERSED_L_SHAPE:
254 cursor_pixmap_w = cursor_pixmap_h/3;
255 cursor_pixmap_x = x - cursor_pixmap_w + 1;
260 XCreatePixmap (fl_display,
264 fl_get_visual_depth());
265 XCopyArea (fl_display,
269 owner.xpos() + cursor_pixmap_x,
270 owner.ypos() + cursor_pixmap_y,
274 XDrawLine(fl_display,
285 case REVERSED_L_SHAPE:
286 int rectangle_h = (cursor_pixmap_h+10)/20;
287 XFillRectangle(fl_display,
290 cursor_pixmap_x + owner.xpos(),
291 y2 - rectangle_h + 1 + owner.ypos(),
292 cursor_pixmap_w - 1, rectangle_h);
297 cursor_visible = true;
301 void LyXScreen::HideCursor()
303 if (!cursor_visible) return;
306 XCopyArea (fl_display,
311 cursor_pixmap_w, cursor_pixmap_h,
312 cursor_pixmap_x + owner.xpos(),
313 cursor_pixmap_y + owner.ypos());
315 cursor_visible = false;
319 void LyXScreen::CursorToggle()
328 /* returns a new top so that the cursor is visible */
329 unsigned long LyXScreen::TopCursorVisible()
334 - text->cursor.row->baseline
335 + text->cursor.row->height
336 - first >= owner.height()) {
337 if (text->cursor.row->height < owner.height()
338 && text->cursor.row->height > owner.height() / 4)
339 newtop = text->cursor.y
340 + text->cursor.row->height
341 - text->cursor.row->baseline - owner.height();
343 newtop = text->cursor.y
344 - 3 * owner.height() / 4; /* the scroll region must be so big!! */
345 } else if (text->cursor.y - text->cursor.row->baseline < first
347 if (text->cursor.row->height < owner.height()
348 && text->cursor.row->height > owner.height() / 4)
349 newtop = text->cursor.y - text->cursor.row->baseline;
351 newtop = text->cursor.y - owner.height() / 4;
352 newtop = min(newtop, long(first));
356 newtop = max(newtop, 0L);
362 /* scrolls the screen so that the cursor is visible, if necessary.
363 * returns true if a change was made, otherwise false */
364 bool LyXScreen::FitCursor()
366 // Is a change necessary?
367 unsigned long newtop = TopCursorVisible();
368 bool result = (newtop != first);
375 void LyXScreen::Update()
377 switch(text->status) {
378 case LyXText::NEED_MORE_REFRESH:
380 long y = max(text->refresh_y - long(first), 0L);
382 DrawFromTo(y, owner.height());
384 text->status = LyXText::UNCHANGED;
386 owner.workWidth(), owner.height() - y);
389 case LyXText::NEED_VERY_LITTLE_REFRESH:
391 // ok I will update the current cursor row
392 DrawOneRow(text->refresh_row, text->refresh_y);
393 text->status = LyXText::UNCHANGED;
394 expose(0, text->refresh_y - first,
395 owner.workWidth(), text->refresh_row->height);
398 case LyXText::UNCHANGED:
399 // Nothing needs done
405 void LyXScreen::ToggleSelection(bool kill_selection)
407 // only if there is a selection
408 if (!text->selection) return;
410 long bottom = min(max(text->sel_end_cursor.y
411 - text->sel_end_cursor.row->baseline
412 + text->sel_end_cursor.row->height, first),
413 first + owner.height());
414 long top = min(max(text->sel_start_cursor.y
415 - text->sel_start_cursor.row->baseline, first),
416 first + owner.height());
420 DrawFromTo(top - first, bottom - first);
421 expose(0, top - first,
423 bottom - first - (top - first));
427 void LyXScreen::ToggleToggle()
429 if (text->toggle_cursor.par == text->toggle_end_cursor.par
430 && text->toggle_cursor.pos == text->toggle_end_cursor.pos)
433 long top = text->toggle_cursor.y
434 - text->toggle_cursor.row->baseline;
435 long bottom = text->toggle_end_cursor.y
436 - text->toggle_end_cursor.row->baseline
437 + text->toggle_end_cursor.row->height;
439 typedef unsigned long ulong;
441 bottom = min(max(ulong(bottom), first), first + owner.height());
442 top = min(max(ulong(top), first), first + owner.height());
444 DrawFromTo(top - first, bottom - first);
445 expose(0, top - first, owner.workWidth(),
446 bottom - first - (top - first));