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()) <= (int)owner.height()))
132 // ok there is something visible
133 LyXText::text_status st = text->status;
136 text->GetVisibleRow(owner.owner(), y, x_offset, row,
138 } while (text->status == LyXText::CHANGED_IN_DRAW);
145 /* draws the screen, starting with textposition y. uses as much already
146 * printed pixels as possible */
147 void LyXScreen::Draw(LyXText * text, unsigned int y)
149 if (cursor_visible) HideCursor();
151 int old_first = text->first;
154 // is any optimiziation possible?
155 if ((y - old_first) < owner.height()
156 && (old_first - y) < owner.height()) {
157 if (text->first < old_first) {
158 DrawFromTo(text, 0, old_first - text->first);
159 XCopyArea (fl_get_display(),
166 owner.height() - old_first + text->first,
168 owner.ypos() + old_first - text->first
170 // expose the area drawn
173 old_first - text->first);
176 owner.height() + old_first - text->first,
178 XCopyArea (fl_get_display(),
183 owner.ypos() + text->first - old_first,
185 owner.height() + old_first - text->first,
188 // expose the area drawn
189 expose(0, owner.height() + old_first - text->first,
190 owner.workWidth(), text->first - old_first);
193 // make a dumb new-draw
194 DrawFromTo(text, 0, owner.height());
195 expose(0, 0, owner.workWidth(), owner.height());
200 void LyXScreen::ShowCursor(LyXText const * text)
202 if (!cursor_visible) {
203 Cursor_Shape shape = BAR_SHAPE;
204 if (text->real_current_font.language() !=
205 owner.owner()->buffer()->params.language
206 || text->real_current_font.isVisibleRightToLeft()
207 != owner.owner()->buffer()->params.language->RightToLeft())
208 shape = (text->real_current_font.isVisibleRightToLeft())
209 ? REVERSED_L_SHAPE : L_SHAPE;
210 ShowManualCursor(text, text->cursor.x(), text->cursor.y(),
211 lyxfont::maxAscent(text->real_current_font),
212 lyxfont::maxDescent(text->real_current_font),
218 /* returns true if first has changed, otherwise false */
219 bool LyXScreen::FitManualCursor(LyXText * text,
220 int /*x*/, int y, int asc, int desc)
222 int newtop = text->first;
224 if (y + desc - text->first >= (int)owner.height())
225 newtop = y - 3 * owner.height() / 4; // the scroll region must be so big!!
226 else if (y - asc < (int)text->first
227 && text->first > 0) {
228 newtop = y - owner.height() / 4;
231 newtop = max(newtop, 0); // can newtop ever be < 0? (Lgb)
233 if (newtop != (int)text->first) {
235 text->first = newtop;
242 void LyXScreen::ShowManualCursor(LyXText const * text, int x, int y,
243 int asc, int desc, Cursor_Shape shape)
245 int y1 = max(y - text->first - asc, 0);
246 int y2 = min(y - text->first + desc, (int)owner.height());
248 // Secure against very strange situations
252 XFreePixmap(fl_get_display(), cursor_pixmap);
256 if ((y2 > 0) && (y1 < int(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_get_display(),
280 fl_get_visual_depth());
281 XCopyArea (fl_get_display(),
285 owner.xpos() + cursor_pixmap_x,
286 owner.ypos() + cursor_pixmap_y,
290 XDrawLine(fl_get_display(),
301 case REVERSED_L_SHAPE:
302 int rectangle_h = (cursor_pixmap_h+10)/20;
303 XFillRectangle(fl_get_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_get_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 int LyXScreen::TopCursorVisible(LyXText const * text)
347 int 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 ((int)(text->cursor.y() - text->cursor.row()->baseline()) <
362 text->first && text->first > 0)
364 if (text->cursor.row()->height() < owner.height()
365 && text->cursor.row()->height() > owner.height() / 4)
366 newtop = text->cursor.y() - text->cursor.row()->baseline();
368 newtop = text->cursor.y() - owner.height() / 4;
369 newtop = min(newtop, int(text->first));
373 newtop = max(newtop, 0);
379 /* scrolls the screen so that the cursor is visible, if necessary.
380 * returns true if a change was made, otherwise false */
381 bool LyXScreen::FitCursor(LyXText * text)
383 // Is a change necessary?
384 int newtop = TopCursorVisible(text);
385 bool result = (newtop != text->first);
392 void LyXScreen::Update(LyXText * text, int y_offset, int x_offset)
394 switch(text->status) {
395 case LyXText::NEED_MORE_REFRESH:
397 int y = max(int(text->refresh_y - text->first), 0);
398 DrawFromTo(text, y, owner.height(), y_offset, x_offset);
400 text->status = LyXText::UNCHANGED;
401 expose(0, y, owner.workWidth(), owner.height() - y);
404 case LyXText::NEED_VERY_LITTLE_REFRESH:
406 // ok I will update the current cursor row
407 DrawOneRow(text, text->refresh_row, text->refresh_y,
409 text->status = LyXText::UNCHANGED;
410 expose(0, text->refresh_y - text->first + y_offset,
411 owner.workWidth(), text->refresh_row->height());
414 case LyXText::CHANGED_IN_DRAW: // just to remove the warning
415 case LyXText::UNCHANGED:
416 // Nothing needs done
422 void LyXScreen::ToggleSelection(LyXText * text, bool kill_selection,
423 int y_offset, int x_offset)
425 // only if there is a selection
426 if (!text->selection) return;
428 int bottom = min(max((int)(text->sel_end_cursor.y()
429 - text->sel_end_cursor.row()->baseline()
430 + text->sel_end_cursor.row()->height()), text->first),
431 (int)(text->first + owner.height()));
432 int top = min(max((int)(text->sel_start_cursor.y() -
433 text->sel_start_cursor.row()->baseline()),
435 (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), (int)(text->first + owner.height()));
460 top = min(max(top, text->first), (int)(text->first + owner.height()));
462 DrawFromTo(text, top - text->first, bottom - text->first, y_offset,
464 expose(0, top - text->first, owner.workWidth(),
465 bottom - text->first - (top - text->first));