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();
135 unsigned long old_first = first;
138 /* is any optimiziation possible? */
139 if ((y - old_first) < owner.height()
140 && (old_first - y) < owner.height()) {
141 if (first < old_first) {
142 DrawFromTo(0, old_first - first);
143 XCopyArea (fl_display,
150 owner.height() - old_first + first,
152 owner.ypos() + old_first - first
154 // expose the area drawn
160 owner.height() + old_first - first,
162 XCopyArea (fl_display,
167 owner.ypos() + first - old_first,
169 owner.height() + old_first - first,
172 // expose the area drawn
173 expose(0, owner.height() + old_first - first,
174 owner.workWidth(), first - old_first);
177 /* make a dumb new-draw */
178 DrawFromTo(0, owner.height());
179 expose(0, 0, owner.workWidth(), owner.height());
184 void LyXScreen::ShowCursor()
186 if (!cursor_visible) {
187 Cursor_Shape shape = BAR_SHAPE;
188 if (text->real_current_font.language() !=
189 text->buffer->params.language_info
190 || text->real_current_font.isVisibleRightToLeft()
191 != text->buffer->params.language_info->RightToLeft)
192 shape = (text->real_current_font.isVisibleRightToLeft())
193 ? REVERSED_L_SHAPE : L_SHAPE;
194 ShowManualCursor(text->cursor.x, text->cursor.y,
195 lyxfont::maxAscent(text->real_current_font),
196 lyxfont::maxDescent(text->real_current_font),
202 /* returns true if first has changed, otherwise false */
203 bool LyXScreen::FitManualCursor(long /*x*/, long y, int asc, int desc)
207 if (y + desc - first >= owner.height())
208 newtop = y - 3 * owner.height() / 4; /* the scroll region must be so big!! */
209 else if (y - asc < long(first)
211 newtop = y - owner.height() / 4;
214 newtop = max(newtop, 0L); // can newtop ever be < 0? (Lgb)
216 if (newtop != long(first)) {
225 void LyXScreen::ShowManualCursor(long x, long y, int asc, int desc,
228 unsigned long y1 = max(y - first - asc, 0UL);
229 typedef unsigned long ulong;
231 unsigned long y2 = min(y - first + desc, ulong(owner.height()));
233 // Secure against very strange situations
234 //if (y2 < y1) y2 = y1;
238 XFreePixmap(fl_display, cursor_pixmap);
242 if (y2 > 0 && y1 < owner.height()) {
243 cursor_pixmap_h = y2 - y1 + 1;
244 cursor_pixmap_y = y1;
252 cursor_pixmap_w = cursor_pixmap_h/3;
255 case REVERSED_L_SHAPE:
256 cursor_pixmap_w = cursor_pixmap_h/3;
257 cursor_pixmap_x = x - cursor_pixmap_w + 1;
262 XCreatePixmap (fl_display,
266 fl_get_visual_depth());
267 XCopyArea (fl_display,
271 owner.xpos() + cursor_pixmap_x,
272 owner.ypos() + cursor_pixmap_y,
276 XDrawLine(fl_display,
287 case REVERSED_L_SHAPE:
288 int rectangle_h = (cursor_pixmap_h+10)/20;
289 XFillRectangle(fl_display,
292 cursor_pixmap_x + owner.xpos(),
293 y2 - rectangle_h + 1 + owner.ypos(),
294 cursor_pixmap_w - 1, rectangle_h);
299 cursor_visible = true;
303 void LyXScreen::HideCursor()
305 if (!cursor_visible) return;
308 XCopyArea (fl_display,
313 cursor_pixmap_w, cursor_pixmap_h,
314 cursor_pixmap_x + owner.xpos(),
315 cursor_pixmap_y + owner.ypos());
317 cursor_visible = false;
321 void LyXScreen::CursorToggle()
330 /* returns a new top so that the cursor is visible */
331 unsigned long LyXScreen::TopCursorVisible()
336 - text->cursor.row->baseline
337 + text->cursor.row->height
338 - first >= owner.height()) {
339 if (text->cursor.row->height < owner.height()
340 && text->cursor.row->height > owner.height() / 4)
341 newtop = text->cursor.y
342 + text->cursor.row->height
343 - text->cursor.row->baseline - owner.height();
345 newtop = text->cursor.y
346 - 3 * owner.height() / 4; /* the scroll region must be so big!! */
347 } else if (text->cursor.y - text->cursor.row->baseline < first
349 if (text->cursor.row->height < owner.height()
350 && text->cursor.row->height > owner.height() / 4)
351 newtop = text->cursor.y - text->cursor.row->baseline;
353 newtop = text->cursor.y - owner.height() / 4;
354 //if (newtop > long(first))
355 newtop = min(newtop, long(first));
360 newtop = max(newtop, 0L);
366 /* scrolls the screen so that the cursor is visible, if necessary.
367 * returns true if a change was made, otherwise false */
368 bool LyXScreen::FitCursor()
370 // Is a change necessary?
371 unsigned long newtop = TopCursorVisible();
372 bool result = (newtop != first);
379 void LyXScreen::Update()
381 switch(text->status) {
382 case LyXText::NEED_MORE_REFRESH:
384 long y = max(text->refresh_y - long(first), 0L);
386 DrawFromTo(y, owner.height());
388 text->status = LyXText::UNCHANGED;
390 owner.workWidth(), owner.height() - y);
393 case LyXText::NEED_VERY_LITTLE_REFRESH:
395 /* ok I will update the current cursor row */
396 DrawOneRow(text->refresh_row, text->refresh_y);
397 text->status = LyXText::UNCHANGED;
398 expose(0, text->refresh_y - first,
399 owner.workWidth(), text->refresh_row->height);
402 case LyXText::UNCHANGED:
403 // Nothing needs done
409 void LyXScreen::ToggleSelection(bool kill_selection)
411 /* only if there is a selection */
412 if (!text->selection) return;
414 //long top = text->sel_start_cursor.y
415 // - text->sel_start_cursor.row->baseline;
416 //long bottom = text->sel_end_cursor.y
417 // - text->sel_end_cursor.row->baseline
418 // + text->sel_end_cursor.row->height;
420 //top = max(top, first);
421 //bottom = max(bottom, first);
423 //bottom = min(max(bottom, first), first + owner.height());
424 //top = min(max(top, first), first + owner.height());
425 long bottom = min(max(text->sel_end_cursor.y
426 - text->sel_end_cursor.row->baseline
427 + text->sel_end_cursor.row->height, first),
428 first + owner.height());
429 long top = min(max(text->sel_start_cursor.y
430 - text->sel_start_cursor.row->baseline, first),
431 first + owner.height());
435 DrawFromTo(top - first, bottom - first);
436 expose(0, top - first,
438 bottom - first - (top - first));
442 void LyXScreen::ToggleToggle()
444 if (text->toggle_cursor.par == text->toggle_end_cursor.par
445 && text->toggle_cursor.pos == text->toggle_end_cursor.pos)
448 long top = text->toggle_cursor.y
449 - text->toggle_cursor.row->baseline;
450 long bottom = text->toggle_end_cursor.y
451 - text->toggle_end_cursor.row->baseline
452 + text->toggle_end_cursor.row->height;
454 //top = max(top, first);
455 //bottom = max(bottom, first);
456 typedef unsigned long ulong;
458 bottom = min(max(ulong(bottom), first), first + owner.height());
459 top = min(max(ulong(top), first), first + owner.height());
461 DrawFromTo(top - first, bottom - first);
462 expose(0, top - first, owner.workWidth(),
463 bottom - first - (top - first));