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_display,
36 DefaultScreen(fl_display));
39 val.graphics_exposures = false;
40 val.line_style = LineSolid;
42 return XCreateGC(fl_display, RootWindow(fl_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)
83 exp_width, exp_height,
89 void LyXScreen::DrawFromTo(LyXText * text, int y1, int y2, int y_offset, int x_offset)
91 long y_text = text->first + y1;
93 // get the first needed row
94 Row * row = text->GetRowNearY(y_text);
95 // y_text is now the real beginning of the row
97 long y = y_text - text->first;
98 // y1 is now the real beginning of row on the screen
100 while (row != 0 && y < y2) {
101 LyXText::text_status st = text->status;
104 text->GetVisibleRow(owner.owner(), y+y_offset,
105 x_offset, row, y + text->first);
106 } while (text->status == LyXText::CHANGED_IN_DRAW);
113 // maybe we have to clear the screen at the bottom
114 if ((y < y2) && text->bv_owner) {
115 owner.getPainter().fillRectangle(0, y,
123 void LyXScreen::DrawOneRow(LyXText * text, Row * row, long y_text,
124 int y_offset, int x_offset)
126 long y = y_text - text->first + y_offset;
128 if (y + row->height() > 0
129 && y - row->height() <= long(owner.height())) {
130 // ok there is something visible
131 LyXText::text_status st = text->status;
134 text->GetVisibleRow(owner.owner(), y, x_offset, row,
136 } while (text->status == LyXText::CHANGED_IN_DRAW);
143 /* draws the screen, starting with textposition y. uses as much already
144 * printed pixels as possible */
145 void LyXScreen::Draw(LyXText * text, unsigned long y)
147 if (cursor_visible) HideCursor();
149 unsigned long old_first = text->first;
152 // is any optimiziation possible?
153 if ((y - old_first) < owner.height()
154 && (old_first - y) < owner.height()) {
155 if (text->first < old_first) {
156 DrawFromTo(text, 0, old_first - text->first);
157 XCopyArea (fl_display,
164 owner.height() - old_first + text->first,
166 owner.ypos() + old_first - text->first
168 // expose the area drawn
171 old_first - text->first);
174 owner.height() + old_first - text->first,
176 XCopyArea (fl_display,
181 owner.ypos() + text->first - old_first,
183 owner.height() + old_first - text->first,
186 // expose the area drawn
187 expose(0, owner.height() + old_first - text->first,
188 owner.workWidth(), text->first - old_first);
191 // make a dumb new-draw
192 DrawFromTo(text, 0, owner.height());
193 expose(0, 0, owner.workWidth(), owner.height());
198 void LyXScreen::ShowCursor(LyXText const * text)
200 if (!cursor_visible) {
201 Cursor_Shape shape = BAR_SHAPE;
202 if (text->real_current_font.language() !=
203 owner.owner()->buffer()->params.language_info
204 || text->real_current_font.isVisibleRightToLeft()
205 != owner.owner()->buffer()->params.language_info->RightToLeft())
206 shape = (text->real_current_font.isVisibleRightToLeft())
207 ? REVERSED_L_SHAPE : L_SHAPE;
208 ShowManualCursor(text, text->cursor.x(), text->cursor.y(),
209 lyxfont::maxAscent(text->real_current_font),
210 lyxfont::maxDescent(text->real_current_font),
216 /* returns true if first has changed, otherwise false */
217 bool LyXScreen::FitManualCursor(LyXText * text,
218 long /*x*/, long y, int asc, int desc)
220 long newtop = text->first;
222 if (y + desc - text->first >= owner.height())
223 newtop = y - 3 * owner.height() / 4; // the scroll region must be so big!!
224 else if (y - asc < long(text->first)
225 && text->first > 0) {
226 newtop = y - owner.height() / 4;
229 newtop = max(newtop, 0L); // can newtop ever be < 0? (Lgb)
231 if (newtop != long(text->first)) {
233 text->first = newtop;
240 void LyXScreen::ShowManualCursor(LyXText const * text, long x, long y,
241 int asc, int desc, Cursor_Shape shape)
243 unsigned long y1 = max(y - text->first - asc, 0UL);
244 typedef unsigned long ulong;
246 unsigned long y2 = min(y - text->first + desc, ulong(owner.height()));
248 // Secure against very strange situations
252 XFreePixmap(fl_display, cursor_pixmap);
256 if (y2 > 0 && y1 < owner.height()) {
257 cursor_pixmap_h = y2 - y1 + 1;
258 cursor_pixmap_y = y1;
266 cursor_pixmap_w = cursor_pixmap_h/3;
269 case REVERSED_L_SHAPE:
270 cursor_pixmap_w = cursor_pixmap_h/3;
271 cursor_pixmap_x = x - cursor_pixmap_w + 1;
276 XCreatePixmap (fl_display,
280 fl_get_visual_depth());
281 XCopyArea (fl_display,
285 owner.xpos() + cursor_pixmap_x,
286 owner.ypos() + cursor_pixmap_y,
290 XDrawLine(fl_display,
301 case REVERSED_L_SHAPE:
302 int rectangle_h = (cursor_pixmap_h+10)/20;
303 XFillRectangle(fl_display,
306 cursor_pixmap_x + owner.xpos(),
307 y2 - rectangle_h + 1 + owner.ypos(),
308 cursor_pixmap_w - 1, rectangle_h);
313 cursor_visible = true;
317 void LyXScreen::HideCursor()
319 if (!cursor_visible) return;
322 XCopyArea (fl_display,
327 cursor_pixmap_w, cursor_pixmap_h,
328 cursor_pixmap_x + owner.xpos(),
329 cursor_pixmap_y + owner.ypos());
331 cursor_visible = false;
335 void LyXScreen::CursorToggle(LyXText const * text)
344 /* returns a new top so that the cursor is visible */
345 unsigned long LyXScreen::TopCursorVisible(LyXText const * text)
347 long newtop = text->first;
350 - text->cursor.row()->baseline()
351 + text->cursor.row()->height()
352 - text->first >= owner.height()) {
353 if (text->cursor.row()->height() < owner.height()
354 && text->cursor.row()->height() > owner.height() / 4)
355 newtop = text->cursor.y()
356 + text->cursor.row()->height()
357 - text->cursor.row()->baseline() - owner.height();
359 newtop = text->cursor.y()
360 - 3 * owner.height() / 4; /* the scroll region must be so big!! */
361 } else if (text->cursor.y() - text->cursor.row()->baseline() < text->first
362 && 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, long(text->first));
372 newtop = max(newtop, 0L);
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 unsigned long 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 long y = max(text->refresh_y - long(text->first), 0L);
398 if (text->inset_owner)
399 height = text->inset_owner->ascent(owner.owner(),
400 text->real_current_font)
401 + text->inset_owner->descent(owner.owner(),
402 text->real_current_font);
404 height = owner.height();
405 DrawFromTo(text, y, owner.height(), y_offset, x_offset);
407 text->status = LyXText::UNCHANGED;
409 owner.workWidth(), owner.height() - y);
412 case LyXText::NEED_VERY_LITTLE_REFRESH:
414 // ok I will update the current cursor row
415 DrawOneRow(text, text->refresh_row, text->refresh_y,
417 text->status = LyXText::UNCHANGED;
418 expose(0, text->refresh_y - text->first + y_offset,
419 owner.workWidth(), text->refresh_row->height());
422 case LyXText::CHANGED_IN_DRAW: // just to remove the warning
423 case LyXText::UNCHANGED:
424 // Nothing needs done
430 void LyXScreen::ToggleSelection(LyXText * text, bool kill_selection,
431 int y_offset, int x_offset)
433 // only if there is a selection
434 if (!text->selection) return;
436 long bottom = min(max(text->sel_end_cursor.y()
437 - text->sel_end_cursor.row()->baseline()
438 + text->sel_end_cursor.row()->height(), text->first),
439 text->first + owner.height());
440 long top = min(max(text->sel_start_cursor.y()
441 - text->sel_start_cursor.row()->baseline(), text->first),
442 text->first + owner.height());
446 DrawFromTo(text, top - text->first, bottom - text->first,
448 expose(0, top - text->first,
450 bottom - text->first - (top - text->first));
454 void LyXScreen::ToggleToggle(LyXText * text, int y_offset, int x_offset)
456 if (text->toggle_cursor.par() == text->toggle_end_cursor.par()
457 && text->toggle_cursor.pos() == text->toggle_end_cursor.pos())
460 long top = text->toggle_cursor.y()
461 - text->toggle_cursor.row()->baseline();
462 long bottom = text->toggle_end_cursor.y()
463 - text->toggle_end_cursor.row()->baseline()
464 + text->toggle_end_cursor.row()->height();
466 typedef unsigned long ulong;
468 bottom = min(max(ulong(bottom), text->first), text->first + owner.height());
469 top = min(max(ulong(top), text->first), text->first + owner.height());
471 DrawFromTo(text, top - text->first, bottom - text->first, y_offset,
473 expose(0, top - text->first, owner.workWidth(),
474 bottom - text->first - (top - text->first));