/* Synchronize redisplay structures and output changes. Copyright (C) 1994, 1995 Board of Trustees, University of Illinois. Copyright (C) 1995, 1996, 2002, 2003 Ben Wing. Copyright (C) 1996 Chuck Thompson. Copyright (C) 1999, 2002 Andy Piper. Copyright (C) 2010 Didier Verna This file is part of XEmacs. XEmacs is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. XEmacs is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with XEmacs. If not, see . */ /* Synched up with: Not in FSF. */ /* This file has been Mule-ized. */ /* Author: Chuck Thompson */ /* Heavily hacked for modularity, gutter and subwindow support by Andy Piper. */ #include #include "lisp.h" #include "buffer.h" #include "window.h" #include "frame-impl.h" #include "device-impl.h" #include "glyphs.h" #include "redisplay.h" #include "faces.h" #include "gutter.h" static int compare_runes (struct window *w, struct rune *crb, struct rune *drb); static void redraw_cursor_in_window (struct window *w, int run_end_begin_glyphs); static void redisplay_output_display_block (struct window *w, struct display_line *dl, int block, int start, int end, int start_pixpos, int cursor_start, int cursor_width, int cursor_height); static void redisplay_normalize_display_box (struct display_box* dest, struct display_glyph_area* src); static int redisplay_display_boxes_in_window_p (struct window* w, struct display_box* db, struct display_glyph_area* dga); static void redisplay_clear_clipped_region (Lisp_Object locale, face_index findex, struct display_box* dest, struct display_glyph_area* glyphsrc, int fullheight_p, Lisp_Object); static void redisplay_redraw_exposed_windows (Lisp_Object window, int x, int y, int width, int height); /***************************************************************************** sync_rune_structs Synchronize the given rune blocks. ****************************************************************************/ static void sync_rune_structs (struct window *UNUSED (w), rune_dynarr *cra, rune_dynarr *dra) { int rune_elt; int max_move = ((Dynarr_length (dra) > Dynarr_largest (cra)) ? Dynarr_largest (cra) : Dynarr_length (dra)); if (max_move) { /* #### Doing this directly breaks the encapsulation. But, the running time of this function has a measurable impact on redisplay performance so avoiding all excess overhead is a good thing. Is all of this true? */ memcpy (cra->base, dra->base, sizeof (struct rune) * max_move); Dynarr_set_lengthr (cra, max_move); } else Dynarr_reset (cra); for (rune_elt = max_move; rune_elt < Dynarr_length (dra); rune_elt++) { struct rune rb, *crb; struct rune *drb = Dynarr_atp (dra, rune_elt); crb = &rb; memcpy (crb, drb, sizeof (struct rune)); Dynarr_add (cra, *crb); } } /***************************************************************************** sync_display_line_structs For the given LINE in window W, make the current display line equal the desired display line. ****************************************************************************/ void sync_display_line_structs (struct window *w, int line, int do_blocks, display_line_dynarr *cdla, display_line_dynarr *ddla) { struct display_line dl, *clp, *dlp; int db_elt; int local = 0; /* #### NOTE: practically, this is not needed because of the memcpy below. #### However, it's cleaner and bugs-in-the-future proof. -- dvl */ DISPLAY_LINE_INIT (dl); dlp = Dynarr_atp (ddla, line); if (line >= Dynarr_largest (cdla)) { clp = &dl; clp->display_blocks = Dynarr_new (display_block); local = 1; } else { clp = Dynarr_atp (cdla, line); if (clp->display_blocks) Dynarr_reset (clp->display_blocks); if (clp->left_glyphs) { Dynarr_free (clp->left_glyphs); clp->left_glyphs = 0; } if (clp->right_glyphs) { Dynarr_free (clp->right_glyphs); clp->right_glyphs = 0; } } { display_block_dynarr *tdb = clp->display_blocks; memcpy (clp, dlp, sizeof (struct display_line)); clp->display_blocks = tdb; clp->left_glyphs = 0; clp->right_glyphs = 0; } if (do_blocks || line < Dynarr_length (cdla)) { for (db_elt = 0; db_elt < Dynarr_length (dlp->display_blocks); db_elt++) { struct display_block db, *cdb; struct display_block *ddb = Dynarr_atp (dlp->display_blocks, db_elt); if (db_elt >= Dynarr_largest (clp->display_blocks)) { cdb = &db; memcpy (cdb, ddb, sizeof (struct display_block)); cdb->runes = Dynarr_new (rune); Dynarr_add (clp->display_blocks, *cdb); } else { rune_dynarr *tr; cdb = Dynarr_atp (clp->display_blocks, db_elt); tr = cdb->runes; memcpy (cdb, ddb, sizeof (struct display_block)); cdb->runes = tr; Dynarr_incrementr (clp->display_blocks); } sync_rune_structs (w, cdb->runes, ddb->runes); } } if (local) Dynarr_add (cdla, *clp); else if (line >= Dynarr_length (cdla)) { assert (line == Dynarr_length (cdla)); Dynarr_incrementr (cdla); } } /***************************************************************************** compare_runes Compare two runes to see if each of their fields is equal. If so, return true otherwise return false. ****************************************************************************/ static int compare_runes (struct window *w, struct rune *crb, struct rune *drb) { /* Do not compare the values of charbpos and endpos. They do not affect the display characteristics. */ /* Note: (hanoi 6) spends 95% of its time in redisplay, and about 30% here. Not using bitfields for rune.type alone gives a redisplay speed up of 10%. #### In profile arcs run of a normal Gnus session this function is run 6.76 million times, only to return 1 in 6.73 million of those. In addition a quick look GCC sparc assembly shows that GCC is not doing a good job here. 1. The function is not inlined (too complicated?) 2. It seems to be reloading the crb and drb variables all the time. 3. It doesn't seem to notice that the second half of these if's are really a switch statement. So I (JV) conjecture #### It would really be worth it to arrange for this function to be (almost) a single call to memcmp. */ if (crb->xpos != drb->xpos) return 0; else if (crb->width != drb->width) return 0; else if (crb->cursor_type != drb->cursor_type) return 0; else if (crb->type != drb->type) return 0; else if (crb->type == RUNE_CHAR && (crb->object.chr.ch != drb->object.chr.ch)) return 0; else if (crb->type == RUNE_HLINE && (crb->object.hline.thickness != drb->object.hline.thickness || crb->object.hline.yoffset != drb->object.hline.yoffset)) return 0; else if (crb->type == RUNE_DGLYPH && (!EQ (crb->object.dglyph.glyph, drb->object.dglyph.glyph) || !EQ (crb->object.dglyph.extent, drb->object.dglyph.extent) || crb->object.dglyph.xoffset != drb->object.dglyph.xoffset || crb->object.dglyph.yoffset != drb->object.dglyph.yoffset || crb->object.dglyph.ascent != drb->object.dglyph.ascent || crb->object.dglyph.descent != drb->object.dglyph.descent)) return 0; /* Only check dirtiness if we know something has changed. */ else if (crb->type == RUNE_DGLYPH && (XGLYPH_DIRTYP (crb->object.dglyph.glyph) || crb->findex != drb->findex)) { /* We need some way of telling redisplay_output_layout () that the only reason we are outputting it is because something has changed internally. That way we can optimize whether we need to clear the layout first and also only output the components that have changed. The image_instance dirty flag and display_hash are no good to us because these will invariably have been set anyway if the layout has changed. So it looks like we need yet another change flag that we can set here and then clear in redisplay_output_layout (). */ Lisp_Object window, image; Lisp_Image_Instance* ii; window = wrap_window (w); image = glyph_image_instance (crb->object.dglyph.glyph, window, ERROR_ME_DEBUG_WARN, 1); if (!IMAGE_INSTANCEP (image)) return 0; ii = XIMAGE_INSTANCE (image); if (TEXT_IMAGE_INSTANCEP (image) && (crb->findex != drb->findex || WINDOW_FACE_CACHEL_DIRTY (w, drb->findex))) return 0; /* It is quite common for the two glyphs to be EQ since in many cases they will actually be the same object. This does not mean, however, that nothing has changed. We therefore need to check the current hash of the glyph against the last recorded display hash and the pending display items. See update_subwindow (). */ if (image_instance_changed (image) || crb->findex != drb->findex || WINDOW_FACE_CACHEL_DIRTY (w, drb->findex)) { /* Now we are going to re-output the glyph, but since this is for some internal reason not related to geometry changes, send a hint to the output routines that they can take some short cuts. This is most useful for layouts. This flag should get reset by the output routines. #### It is possible for us to get here when the face_cachel is dirty. I do not know what the implications of this are.*/ IMAGE_INSTANCE_OPTIMIZE_OUTPUT (ii) = 1; return 0; } else return 1; } /* We now do this last so that glyph checks can do their own thing for face changes. Face changes quite often happen when we are trying to output something in the gutter, this would normally lead to a lot of flashing. The indices can quite often be different and yet the faces are the same, we do not want to re-output in this instance. */ else if (crb->findex != drb->findex || WINDOW_FACE_CACHEL_DIRTY (w, drb->findex)) return 0; else return 1; } #if 0 void compare_runes_2 (struct window *w, struct rune *crb, struct rune *drb) { if (crb->type == DGLYPH) { if (!EQ (crb->object.dglyph.glyph, drb->object.dglyph.glyph) || !EQ (crb->object.dglyph.extent, drb->object.dglyph.extent) || crb->object.dglyph.xoffset != drb->object.dglyph.xoffset || crb->object.dglyph.yoffset != drb->object.dglyph.yoffset || crb->object.dglyph.ascent != drb->object.dglyph.ascent || crb->object.dglyph.descent != drb->object.dglyph.descent) return 0; /* Only check dirtiness if we know something has changed. */ else if (XGLYPH_DIRTYP (crb->object.dglyph.glyph) || crb->findex != drb->findex) { /* We need some way of telling redisplay_output_layout () that the only reason we are outputting it is because something has changed internally. That way we can optimize whether we need to clear the layout first and also only output the components that have changed. The image_instance dirty flag and display_hash are no good to us because these will invariably have been set anyway if the layout has changed. So it looks like we need yet another change flag that we can set here and then clear in redisplay_output_layout (). */ Lisp_Object window, image; Lisp_Image_Instance* ii; window = wrap_window (w); image = glyph_image_instance (crb->object.dglyph.glyph, window, crb->object.dglyph.matchspec, ERROR_ME_DEBUG_WARN, 1); if (!IMAGE_INSTANCEP (image)) return 0; ii = XIMAGE_INSTANCE (image); if (TEXT_IMAGE_INSTANCEP (image) && (crb->findex != drb->findex || WINDOW_FACE_CACHEL_DIRTY (w, drb->findex))) return 0; /* It is quite common for the two glyphs to be EQ since in many cases they will actually be the same object. This does not mean, however, that nothing has changed. We therefore need to check the current hash of the glyph against the last recorded display hash and the pending display items. See update_widget () ^^#### which function?. */ if (image_instance_changed (image) || crb->findex != drb->findex || WINDOW_FACE_CACHEL_DIRTY (w, drb->findex)) { /* Now we are going to re-output the glyph, but since this is for some internal reason not related to geometry changes, send a hint to the output routines that they can take some short cuts. This is most useful for layouts. This flag should get reset by the output routines. #### It is possible for us to get here when the face_cachel is dirty. I do not know what the implications of this are.*/ IMAGE_INSTANCE_OPTIMIZE_OUTPUT (ii) = 1; return 0; } else return 1; } else if (crb->findex != drb->findex || WINDOW_FACE_CACHEL_DIRTY (w, drb->findex)) return 0; else return 1; } else return !(memcmp (crb, drb, sizeof (*crb)) || WINDOW_FACE_CACHEL_DIRTY (w, drb->findex)); } #endif /***************************************************************************** get_next_display_block Return the next display starting at or overlapping START_POS. Return the start of the next region in NEXT_START. ****************************************************************************/ int get_next_display_block (layout_bounds bounds, display_block_dynarr *dba, int start_pos, int *next_start) { int next_display_block = NO_BLOCK; int priority = -1; int block; /* If we don't find a display block covering or starting at start_pos, then we return the starting point of the next display block or the next division boundary, whichever is closer to start_pos. */ if (next_start) { if (start_pos >= bounds.left_out && start_pos < bounds.left_in) *next_start = bounds.left_in; else if (start_pos < bounds.left_white) *next_start = bounds.left_white; else if (start_pos < bounds.right_white) *next_start = bounds.right_white; else if (start_pos < bounds.right_in) *next_start = bounds.right_in; else if (start_pos <= bounds.right_out) *next_start = bounds.right_out; else { ABORT (); *next_start = 0; } } for (block = 0; block < Dynarr_length (dba); block++) { struct display_block *db = Dynarr_atp (dba, block); if (db->start_pos <= start_pos && db->end_pos > start_pos) { if ((int) db->type > priority) { priority = db->type; next_display_block = block; if (next_start) *next_start = db->end_pos; } } else if (next_start && db->start_pos > start_pos) { if (db->start_pos < *next_start) *next_start = db->start_pos; } } return next_display_block; } /***************************************************************************** get_cursor_size_and_location Return the information defining the pixel location of the cursor. ****************************************************************************/ static void get_cursor_size_and_location (struct window *w, struct display_block *db, int cursor_location, int *cursor_start, int *cursor_width, int *cursor_height) { struct rune *rb; Lisp_Object window; int defheight, defwidth; if (Dynarr_length (db->runes) <= cursor_location) ABORT (); window = wrap_window (w); rb = Dynarr_atp (db->runes, cursor_location); *cursor_start = rb->xpos; default_face_width_and_height (window, &defwidth, &defheight); *cursor_height = defheight; if (rb->type == RUNE_BLANK) *cursor_width = defwidth; else *cursor_width = rb->width; } /***************************************************************************** compare_display_blocks Given two display blocks, output only those areas where they differ. ****************************************************************************/ static int compare_display_blocks (struct window *w, struct display_line *cdl, struct display_line *ddl, int c_block, int d_block, int start_pixpos, int cursor_start, int cursor_width, int cursor_height) { struct frame *f = XFRAME (w->frame); struct display_block *cdb, *ddb; int start_pos; int stop_pos; int force = 0; #if 0 int block_end; #endif cdb = Dynarr_atp (cdl->display_blocks, c_block); ddb = Dynarr_atp (ddl->display_blocks, d_block); assert (cdb->type == ddb->type); start_pos = -1; stop_pos = min (Dynarr_length (cdb->runes), Dynarr_length (ddb->runes)); #if 0 block_end = (!Dynarr_length (ddb->runes) ? 0 : (Dynarr_lastp (ddb->runes)->xpos + Dynarr_lastp (ddb->runes)->width)); #endif /* If the new block type is not text and the cursor status is changing and it overlaps the position of this block then force a full redraw of the block in order to make sure that the cursor is updated properly. */ if (ddb->type != TEXT #if 0 /* I'm not sure exactly what this code wants to do, but it's * not right--it doesn't update when cursor_elt changes from, e.g., * 0 to 8, and the new or old cursor loc overlaps this block. * I've replaced it with the more conservative test below. * -dkindred@cs.cmu.edu 23-Mar-1997 */ && ((cdl->cursor_elt == -1 && ddl->cursor_elt != -1) || (cdl->cursor_elt != -1 && ddl->cursor_elt == -1)) && (ddl->cursor_elt == -1 || (cursor_start && cursor_width && (cursor_start + cursor_width) >= start_pixpos && cursor_start <= block_end)) #else && (cdl->cursor_elt != ddl->cursor_elt) #endif ) force = 1; if (f->windows_structure_changed || /* #### Why is this so? We have face cachels so that we don't have to recalculate all the display blocks when faces change. I have fixed this for glyphs and am inclined to think that faces should "Just Work", but I'm not feeling brave today. Maybe its because the face cachels represent merged faces rather than simply instantiations in a particular domain. */ f->faces_changed || cdl->ypos != ddl->ypos || cdl->ascent != ddl->ascent || cdl->descent != ddl->descent || cdl->clip != ddl->clip || cdl->clear_findex != ddl->clear_findex || force) { start_pos = 0; force = 1; } else { int elt = 0; while (start_pos < 0 && elt < stop_pos) { if (!compare_runes (w, Dynarr_atp (cdb->runes, elt), Dynarr_atp (ddb->runes, elt))) { start_pos = elt; } else { elt++; } } /* If nothing has changed in the area where the blocks overlap, but there are new blocks in the desired block, then adjust the start point accordingly. */ if (elt == stop_pos && stop_pos < Dynarr_length (ddb->runes)) start_pos = stop_pos; } if (start_pos >= 0) { if ((Dynarr_length (ddb->runes) != Dynarr_length (cdb->runes)) || force) { stop_pos = Dynarr_length (ddb->runes); } else { /* If the lines have the same number of runes and we are not forcing a full redraw because the display line has changed position then we try and optimize how much of the line we actually redraw by scanning backwards from the end for the first changed rune. This optimization is almost always triggered by face changes. */ int elt = Dynarr_length (ddb->runes) - 1; while (elt > start_pos) { if (!compare_runes (w, Dynarr_atp (cdb->runes, elt), Dynarr_atp (ddb->runes, elt))) break; else elt--; } stop_pos = elt + 1; } redisplay_output_display_block (w, ddl, d_block, start_pos, stop_pos, start_pixpos, cursor_start, cursor_width, cursor_height); return 1; } return 0; } /***************************************************************************** clear_left_border Clear the lefthand outside border. ****************************************************************************/ static void clear_left_border (struct window *w, int y, int height) { struct frame *f = XFRAME (w->frame); Lisp_Object window = wrap_window (w); redisplay_clear_region (window, DEFAULT_INDEX, FRAME_LEFT_INTERNAL_BORDER_START (f), y, FRAME_INTERNAL_BORDER_WIDTH (f), height); } /***************************************************************************** clear_right_border Clear the righthand outside border. ****************************************************************************/ static void clear_right_border (struct window *w, int y, int height) { struct frame *f = XFRAME (w->frame); Lisp_Object window = wrap_window (w); redisplay_clear_region (window, DEFAULT_INDEX, FRAME_RIGHT_INTERNAL_BORDER_START (f), y, FRAME_INTERNAL_BORDER_WIDTH (f), height); } /***************************************************************************** output_display_line Ensure that the contents of the given display line is correct on-screen. The force_ parameters are used by redisplay_move_cursor to correctly update cursor locations and only cursor locations. ****************************************************************************/ void output_display_line (struct window *w, display_line_dynarr *cdla, display_line_dynarr *ddla, int line, int force_start, int force_end) { struct frame *f = XFRAME (w->frame); struct buffer *b = XBUFFER (w->buffer); struct buffer *old_b = window_display_buffer (w); struct display_line *cdl, *ddl; display_block_dynarr *cdba, *ddba; int start_pixpos, end_pixpos; int cursor_start, cursor_width, cursor_height; int force = (force_start >= 0 || force_end >= 0); int clear_border = 0; int must_sync = 0; if (cdla && line < Dynarr_length (cdla)) { cdl = Dynarr_atp (cdla, line); cdba = cdl->display_blocks; } else { cdl = NULL; cdba = NULL; } /* The following will assert line < Dynarr_length (ddla) */ ddl = Dynarr_atp (ddla, line); ddba = ddl->display_blocks; if (force_start >= 0 && force_start >= ddl->bounds.left_out) start_pixpos = force_start; else start_pixpos = ddl->bounds.left_out; if (force_end >= 0 && force_end < ddl->bounds.right_out) end_pixpos = force_end; else end_pixpos = ddl->bounds.right_out; /* Get the cursor parameters. */ if (ddl->cursor_elt != -1) { struct display_block *db; /* If the lines cursor parameter is not -1 then it indicates which rune in the TEXT block contains the cursor. This means that there must be at least one display block. The TEXT block, if present, must always be the first display block. */ assert (Dynarr_length (ddba) != 0); db = Dynarr_begin (ddba); assert (db->type == TEXT); get_cursor_size_and_location (w, db, ddl->cursor_elt, &cursor_start, &cursor_width, &cursor_height); } else { cursor_start = cursor_width = cursor_height = 0; } /* The modeline should only have a single block and it had better be a TEXT block. */ if (ddl->modeline) { /* The shadow thickness check is necessary if only the sign of the size changed. */ if (cdba && !w->shadow_thickness_changed) { must_sync |= compare_display_blocks (w, cdl, ddl, 0, 0, start_pixpos, 0, 0, 0); } else { redisplay_output_display_block (w, ddl, 0, 0, -1, start_pixpos, 0, 0, 0); must_sync = 1; } if (must_sync) clear_border = 1; } while (!ddl->modeline && start_pixpos < end_pixpos) { int block; int next_start_pixpos; block = get_next_display_block (ddl->bounds, ddba, start_pixpos, &next_start_pixpos); /* If we didn't find a block then we should blank the area between start_pos and next_start if necessary. */ if (block == NO_BLOCK) { /* We only erase those areas which were actually previously covered by a display block unless the window structure changed. In that case we clear all areas since the current structures may actually represent a different buffer. */ while (start_pixpos < next_start_pixpos) { int block_end; int old_block; if (cdba) old_block = get_next_display_block (ddl->bounds, cdba, start_pixpos, &block_end); else { old_block = NO_BLOCK; block_end = next_start_pixpos; } if (!cdba || old_block != NO_BLOCK || b != old_b || f->windows_structure_changed || f->faces_changed || force || (cdl && (cdl->ypos != ddl->ypos || cdl->ascent != ddl->ascent || cdl->descent != ddl->descent || cdl->top_clip != ddl->top_clip || cdl->clip != ddl->clip || cdl->clear_findex != ddl->clear_findex))) { int x, y, width, height; face_index findex; must_sync = 1; x = start_pixpos; y = DISPLAY_LINE_YPOS (ddl); width = min (next_start_pixpos, block_end) - x; height = DISPLAY_LINE_HEIGHT (ddl); if (x < ddl->bounds.left_in) { findex = (ddl->left_margin_findex > DEFAULT_INDEX) ? ddl->left_margin_findex : get_builtin_face_cache_index (w, Vleft_margin_face); } else if (x < ddl->bounds.right_in) { findex = (ddl->clear_findex >= DEFAULT_INDEX) ? ddl->clear_findex : DEFAULT_INDEX; } else if (x < ddl->bounds.right_out) { findex = (ddl->right_margin_findex > DEFAULT_INDEX) ? ddl->right_margin_findex : get_builtin_face_cache_index (w, Vright_margin_face); } else findex = (face_index) -1; if (findex != (face_index) -1) { Lisp_Object window = wrap_window (w); /* Clear the empty area. */ redisplay_clear_region (window, findex, x, y, width, height); /* Mark that we should clear the border. This is necessary because italic fonts may leave droppings in the border. */ clear_border = 1; } } start_pixpos = min (next_start_pixpos, block_end); } } else { struct display_block *cdb, *ddb; int block_end; int old_block; if (cdba) old_block = get_next_display_block (ddl->bounds, cdba, start_pixpos, &block_end); else old_block = NO_BLOCK; ddb = Dynarr_atp (ddba, block); cdb = (old_block != NO_BLOCK ? Dynarr_atp (cdba, old_block) : 0); /* If there was formerly no block over the current region or if it was a block of a different type, then output the entire ddb. Otherwise, compare cdb and ddb and output only the changed region. */ if (!force && cdb && ddb->type == cdb->type /* If there was no buffer being display before the compare anyway as we might be outputting a gutter. */ && (b == old_b || !old_b)) { must_sync |= compare_display_blocks (w, cdl, ddl, old_block, block, start_pixpos, cursor_start, cursor_width, cursor_height); } else { int elt; int first_elt = 0; int last_elt = -1; for (elt = 0; elt < Dynarr_length (ddb->runes); elt++) { struct rune *rb = Dynarr_atp (ddb->runes, elt); if (start_pixpos >= rb->xpos && start_pixpos < rb->xpos + rb->width) first_elt = elt; if (end_pixpos > rb->xpos && end_pixpos <= rb->xpos + rb->width) { last_elt = elt + 1; if (last_elt > Dynarr_length (ddb->runes)) last_elt = Dynarr_length (ddb->runes); break; } } must_sync = 1; redisplay_output_display_block (w, ddl, block, first_elt, last_elt, start_pixpos, cursor_start, cursor_width, cursor_height); } start_pixpos = next_start_pixpos; } } /* Clear the internal border if we are next to it and the window structure or frame size has changed or if something caused clear_border to be tripped. */ /* #### Doing this on f->clear sucks but is necessary because of window-local background values. */ if (f->windows_structure_changed || f->faces_changed || clear_border || f->clear) { int y = DISPLAY_LINE_YPOS (ddl); int height = DISPLAY_LINE_HEIGHT (ddl); /* If we are in the gutter then we musn't clear the borders. */ if (y >= WINDOW_TEXT_TOP (w) && (y + height) <= WINDOW_TEXT_BOTTOM (w)) { if (ddl->modeline) { y -= MODELINE_SHADOW_THICKNESS (w); height += (2 * MODELINE_SHADOW_THICKNESS (w)); } if (window_is_leftmost (w)) clear_left_border (w, y, height); if (window_is_rightmost (w)) clear_right_border (w, y, height); } } if (cdla) sync_display_line_structs (w, line, must_sync, cdla, ddla); } /***************************************************************************** redisplay_move_cursor For the given window W, move the cursor to NEW_POINT. Returns a boolean indicating success or failure. ****************************************************************************/ #define ADJ_CHARPOS (rb->charpos + dl->offset) #define ADJ_ENDPOS (rb->endpos + dl->offset) int redisplay_move_cursor (struct window *w, Charbpos new_point, int no_output_end) { struct frame *f = XFRAME (w->frame); struct device *d = XDEVICE (f->device); display_line_dynarr *cla = window_display_lines (w, CURRENT_DISP); struct display_line *dl; struct display_block *db; struct rune *rb; int x = w->last_point_x[CURRENT_DISP]; int y = w->last_point_y[CURRENT_DISP]; /* * Bail if cursor_in_echo_area is non-zero and we're fiddling with * the cursor in a non-active minibuffer window, since that is a * special case that is handled elsewhere and this function need * not handle it. Return 1 so the caller will assume we * succeeded. */ if (cursor_in_echo_area && MINI_WINDOW_P (w) && w != XWINDOW (FRAME_SELECTED_WINDOW (f))) return 1; if (y < 0 || y >= Dynarr_length (cla)) return 0; dl = Dynarr_atp (cla, y); db = get_display_block_from_line (dl, TEXT); if (x < 0 || x >= Dynarr_length (db->runes)) return 0; rb = Dynarr_atp (db->runes, x); if (rb->cursor_type == CURSOR_OFF) return 0; else if (ADJ_CHARPOS == new_point || (ADJ_ENDPOS && (new_point >= ADJ_CHARPOS) && (new_point <= ADJ_ENDPOS))) { w->last_point_x[CURRENT_DISP] = x; w->last_point_y[CURRENT_DISP] = y; Fset_marker (w->last_point[CURRENT_DISP], make_fixnum (ADJ_CHARPOS), w->buffer); dl->cursor_elt = x; return 1; } else { { MAYBE_DEVMETH (d, frame_output_begin, (f)); MAYBE_DEVMETH (d, window_output_begin, (w)); } rb->cursor_type = CURSOR_OFF; dl->cursor_elt = -1; output_display_line (w, 0, cla, y, rb->xpos, rb->xpos + rb->width); } w->last_point_x[CURRENT_DISP] = -1; w->last_point_y[CURRENT_DISP] = -1; Fset_marker (w->last_point[CURRENT_DISP], Qnil, w->buffer); /* If this isn't the selected frame, then erasing the old cursor is all we actually had to do. */ if (w != XWINDOW (FRAME_SELECTED_WINDOW (device_selected_frame (d)))) { if (!no_output_end) { MAYBE_DEVMETH (d, window_output_end, (w)); MAYBE_DEVMETH (d, frame_output_end, (f)); } return 1; } /* This should only occur in the minibuffer. */ if (new_point == 0) { w->last_point_x[CURRENT_DISP] = 0; w->last_point_y[CURRENT_DISP] = y; Fset_marker (w->last_point[CURRENT_DISP], Qzero, w->buffer); rb = Dynarr_begin (db->runes); rb->cursor_type = CURSOR_ON; dl->cursor_elt = 0; output_display_line (w, 0, cla, y, rb->xpos, rb->xpos + rb->width); if (!no_output_end) { MAYBE_DEVMETH (d, window_output_end, (w)); MAYBE_DEVMETH (d, frame_output_end, (f)); } return 1; } else { int cur_rb = 0; int first = 0; int cur_dl, up; if (ADJ_CHARPOS < new_point) { up = 1; cur_rb = x + 1; cur_dl = y; } else /* (rb->charbpos + dl->offset) > new_point */ { up = 0; if (!x) { cur_dl = y - 1; first = 0; } else { cur_rb = x - 1; cur_dl = y; first = 1; } } while (up ? (cur_dl < Dynarr_length (cla)) : (cur_dl >= 0)) { dl = Dynarr_atp (cla, cur_dl); db = get_display_block_from_line (dl, TEXT); if (!up && !first) cur_rb = Dynarr_length (db->runes) - 1; while ((!scroll_on_clipped_lines || !dl->clip) && (up ? (cur_rb < Dynarr_length (db->runes)) : (cur_rb >= 0))) { rb = Dynarr_atp (db->runes, cur_rb); if (rb->cursor_type != IGNORE_CURSOR && rb->cursor_type != NO_CURSOR && (ADJ_CHARPOS == new_point || (ADJ_ENDPOS && (new_point >= ADJ_CHARPOS) && (new_point <= ADJ_CHARPOS)))) { rb->cursor_type = CURSOR_ON; dl->cursor_elt = cur_rb; output_display_line (w, 0, cla, cur_dl, rb->xpos, rb->xpos + rb->width); w->last_point_x[CURRENT_DISP] = cur_rb; w->last_point_y[CURRENT_DISP] = cur_dl; Fset_marker (w->last_point[CURRENT_DISP], make_fixnum (ADJ_CHARPOS), w->buffer); if (!no_output_end) { MAYBE_DEVMETH (d, window_output_end, (w)); MAYBE_DEVMETH (d, frame_output_end, (f)); } return 1; } (up ? cur_rb++ : cur_rb--); } (up ? (cur_rb = 0) : (first = 0)); (up ? cur_dl++ : cur_dl--); } } if (!no_output_end) { MAYBE_DEVMETH (d, window_output_end, (w)); MAYBE_DEVMETH (d, frame_output_end, (f)); } return 0; } #undef ADJ_CHARPOS #undef ADJ_ENDPOS /***************************************************************************** redraw_cursor_in_window For the given window W, redraw the cursor if it is contained within the window. ****************************************************************************/ static void redraw_cursor_in_window (struct window *w, int run_end_begin_meths) { struct frame *f = XFRAME (w->frame); struct device *d = XDEVICE (f->device); display_line_dynarr *dla = window_display_lines (w, CURRENT_DISP); struct display_line *dl; struct display_block *db; struct rune *rb; int x = w->last_point_x[CURRENT_DISP]; int y = w->last_point_y[CURRENT_DISP]; if (cursor_in_echo_area && MINI_WINDOW_P (w) && !echo_area_active (f) && minibuf_level == 0) { MAYBE_DEVMETH (d, set_final_cursor_coords, (f, w->pixel_top, 0)); } if (y < 0 || y >= Dynarr_length (dla)) return; if (MINI_WINDOW_P (w) && f != device_selected_frame (d) && !is_surrogate_for_selected_frame (f)) return; dl = Dynarr_atp (dla, y); db = get_display_block_from_line (dl, TEXT); if (x < 0 || x >= Dynarr_length (db->runes)) return; rb = Dynarr_atp (db->runes, x); /* Don't call the output routine if the block isn't actually the cursor. */ if (rb->cursor_type == CURSOR_ON) { MAYBE_DEVMETH (d, set_final_cursor_coords, (f, dl->ypos - 1, rb->xpos)); if (run_end_begin_meths) { MAYBE_DEVMETH (d, frame_output_begin, (f)); MAYBE_DEVMETH (d, window_output_begin, (w)); } output_display_line (w, 0, dla, y, rb->xpos, rb->xpos + rb->width); if (run_end_begin_meths) { MAYBE_DEVMETH (d, window_output_end, (w)); MAYBE_DEVMETH (d, frame_output_end, (f)); } } } /***************************************************************************** redisplay_redraw_cursor For the given frame F, redraw the cursor on the selected window. This is used to update the cursor after focus changes. ****************************************************************************/ void redisplay_redraw_cursor (struct frame *f, int run_end_begin_meths) { Lisp_Object window; if (!cursor_in_echo_area) window = FRAME_SELECTED_WINDOW (f); else if (FRAME_HAS_MINIBUF_P (f)) window = FRAME_MINIBUF_WINDOW (f); else return; redraw_cursor_in_window (XWINDOW (window), run_end_begin_meths); } /**************************************************************************** redisplay_output_display_block Given a display line, a block number for that start line, output all runes between start and end in the specified display block. ****************************************************************************/ static void redisplay_output_display_block (struct window *w, struct display_line *dl, int block, int start, int end, int start_pixpos, int cursor_start, int cursor_width, int cursor_height) { struct frame *f = XFRAME (w->frame); struct device *d = XDEVICE (f->device); /* Temporarily disabled until generalization is done. */ #if 0 struct display_block *db = Dynarr_atp (dl->display_blocks, block); rune_dynarr *rba = db->runes; struct rune *rb; int xpos, width; rb = Dynarr_atp (rba, start); if (!rb) /* Nothing to do so don't do anything. */ return; xpos = max (start_pixpos, rb->xpos); if (end < 0) end = Dynarr_length (rba); rb = Dynarr_atp (rba, end - 1); width = rb->xpos + rb->width - xpos; #endif /* now actually output the block. */ DEVMETH (d, output_display_block, (w, dl, block, start, end, start_pixpos, cursor_start, cursor_width, cursor_height)); } /**************************************************************************** redisplay_unmap_subwindows Remove subwindows from the area in the box defined by the given parameters. ****************************************************************************/ static void redisplay_unmap_subwindows (struct frame* f, int x, int y, int width, int height, Lisp_Object ignored_window) { Lisp_Object rest; LIST_LOOP (rest, XWEAK_LIST_LIST (FRAME_SUBWINDOW_CACHE (f))) { Lisp_Image_Instance *ii = XIMAGE_INSTANCE (XCAR (rest)); if (IMAGE_INSTANCE_SUBWINDOW_DISPLAYEDP (ii) && IMAGE_INSTANCE_DISPLAY_X (ii) + IMAGE_INSTANCE_DISPLAY_WIDTH (ii) > x && IMAGE_INSTANCE_DISPLAY_X (ii) < x + width && IMAGE_INSTANCE_DISPLAY_Y (ii) + IMAGE_INSTANCE_DISPLAY_HEIGHT (ii) > y && IMAGE_INSTANCE_DISPLAY_Y (ii) < y + height && !EQ (XCAR (rest), ignored_window)) { unmap_subwindow (XCAR (rest)); } } } /**************************************************************************** redisplay_unmap_subwindows_maybe Potentially subwindows from the area in the box defined by the given parameters. ****************************************************************************/ void redisplay_unmap_subwindows_maybe (struct frame *f, int x, int y, int width, int height) { if (!NILP (XWEAK_LIST_LIST (FRAME_SUBWINDOW_CACHE (f)))) { redisplay_unmap_subwindows (f, x, y, width, height, Qnil); } } static void redisplay_unmap_subwindows_except_us (struct frame *f, int x, int y, int width, int height, Lisp_Object subwindow) { if (!NILP (XWEAK_LIST_LIST (FRAME_SUBWINDOW_CACHE (f)))) { redisplay_unmap_subwindows (f, x, y, width, height, subwindow); } } /**************************************************************************** redisplay_output_subwindow output a subwindow. This code borrows heavily from the pixmap stuff, although is much simpler not needing to account for partial pixmaps, backgrounds etc. ****************************************************************************/ void redisplay_output_subwindow (struct window *w, Lisp_Object image_instance, struct display_box* db, struct display_glyph_area* dga, face_index findex, int UNUSED (cursor_start), int UNUSED (cursor_width), int UNUSED (cursor_height)) { Lisp_Image_Instance *p = XIMAGE_INSTANCE (image_instance); Lisp_Object window; struct display_glyph_area sdga; dga->height = IMAGE_INSTANCE_HEIGHT (p); dga->width = IMAGE_INSTANCE_WIDTH (p); /* The first thing we are going to do is update the display characteristics of the subwindow. This also clears the dirty flags as a side effect. */ redisplay_subwindow (image_instance); /* This makes the glyph area fit into the display area. */ if (!redisplay_normalize_glyph_area (db, dga)) return; window = wrap_window (w); /* Clear the area the subwindow is going into. */ redisplay_clear_clipped_region (window, findex, db, dga, 0, image_instance); /* This shrinks the display box to exactly enclose the glyph area. */ redisplay_normalize_display_box (db, dga); /* if we can't view the whole window we can't view any of it. We have to be careful here since we may be being asked to display part of a subwindow, the rest of which is on-screen as well. We need to allow this case and map the entire subwindow. We also need to be careful since the subwindow could be outside the window in the gutter or modeline - we also need to allow these cases.*/ sdga.xoffset = -dga->xoffset; sdga.yoffset = -dga->yoffset; sdga.height = IMAGE_INSTANCE_HEIGHT (p); sdga.width = IMAGE_INSTANCE_WIDTH (p); if (redisplay_display_boxes_in_window_p (w, db, &sdga) == 0 || /* We only want to do full subwindow display for windows that are completely in the gutter, otherwise we must clip to be safe. */ display_boxes_in_gutter_p (XFRAME (w->frame), db, &sdga) <= 0) { map_subwindow (image_instance, db->xpos, db->ypos, dga); } else { sdga.xoffset = sdga.yoffset = 0; map_subwindow (image_instance, db->xpos - dga->xoffset, db->ypos - dga->yoffset, &sdga); } } /**************************************************************************** redisplay_output_layout Output a widget hierarchy. This can safely call itself recursively. The complexity of outputting layouts is deciding whether to do it or not. Consider a layout enclosing some text, the text changes and is marked as dirty, but the enclosing layout has not been marked as dirty so no updates occur and the text will potentially be truncated. Alternatively we hold a back pointer in the image instance to the parent and mark the parent as dirty. But the layout code assumes that if the layout is dirty then the whole layout should be redisplayed, so we then get lots of flashing even though only the text has changed size. Of course if the text shrinks in size then we do actually need to redisplay the layout to repaint the exposed area. So what happens if we make a non-structural change like changing color? Either we redisplay everything, or we redisplay nothing. These are exactly the issues lwlib has to grapple with. We really need to know what has actually changed and make a layout decision based on that. We also really need to know what has changed so that we can only make the necessary changes in update_subwindow. This has all now been implemented, Viva la revolution! ****************************************************************************/ void redisplay_output_layout (Lisp_Object domain, Lisp_Object image_instance, struct display_box* db, struct display_glyph_area* dga, face_index findex, int UNUSED (cursor_start), int UNUSED (cursor_width), int UNUSED (cursor_height)) { Lisp_Image_Instance *p = XIMAGE_INSTANCE (image_instance); Lisp_Object rest, window = DOMAIN_WINDOW (domain); Ichar_dynarr *buf; struct window *w = XWINDOW (window); struct device *d = DOMAIN_XDEVICE (domain); int layout_height, layout_width; layout_height = glyph_height (image_instance, domain); layout_width = glyph_width (image_instance, domain); dga->height = layout_height; dga->width = layout_width; #ifdef DEBUG_WIDGET_OUTPUT printf ("outputing layout glyph %p\n", p); #endif /* This makes the glyph area fit into the display area. */ if (!redisplay_normalize_glyph_area (db, dga)) return; buf = Dynarr_new (Ichar); /* Highly dodgy optimization. We want to only output the whole layout if we really have to. */ if (!IMAGE_INSTANCE_OPTIMIZE_OUTPUT (p) || IMAGE_INSTANCE_LAYOUT_CHANGED (p) || IMAGE_INSTANCE_WIDGET_FACE_CHANGED (p) || IMAGE_INSTANCE_SIZE_CHANGED (p) || IMAGE_INSTANCE_WIDGET_ITEMS_CHANGED (p)) { /* First clear the area we are drawing into. This is the easiest thing to do since we have many gaps that we have to make sure are filled in. */ redisplay_clear_clipped_region (window, findex, db, dga, 1, Qnil); /* Output a border if required */ if (!NILP (IMAGE_INSTANCE_LAYOUT_BORDER (p))) { int edges = 0; enum edge_style style; int ypos = db->ypos; int xpos = db->xpos; int height = dga->height; int width = dga->width; /* The bevel_area routines always draw in from the specified area so there is no need to adjust the displayed area to make sure that the lines are visible. */ if (dga->xoffset >= 0) edges |= EDGE_LEFT; if (dga->width - dga->xoffset == layout_width) edges |= EDGE_RIGHT; if (dga->yoffset >= 0) edges |= EDGE_TOP; if (dga->height - dga->yoffset == layout_height) edges |= EDGE_BOTTOM; if (EQ (IMAGE_INSTANCE_LAYOUT_BORDER (p), Qetched_in)) style = EDGE_ETCHED_IN; else if (EQ (IMAGE_INSTANCE_LAYOUT_BORDER (p), Qetched_out)) style = EDGE_ETCHED_OUT; else if (EQ (IMAGE_INSTANCE_LAYOUT_BORDER (p), Qbevel_in)) style = EDGE_BEVEL_IN; else if (FIXNUMP (IMAGE_INSTANCE_LAYOUT_BORDER (p))) { style = EDGE_ETCHED_IN; if (edges & EDGE_TOP) { ypos += XFIXNUM (IMAGE_INSTANCE_LAYOUT_BORDER (p)); height -= XFIXNUM (IMAGE_INSTANCE_LAYOUT_BORDER (p)); } } else style = EDGE_BEVEL_OUT; MAYBE_DEVMETH (d, bevel_area, (w, findex, xpos, ypos, width, height, DEFAULT_WIDGET_SHADOW_WIDTH, edges, style)); } } /* This shrinks the display box to exactly enclose the glyph area. */ redisplay_normalize_display_box (db, dga); /* Flip through the widgets in the layout displaying as necessary */ LIST_LOOP (rest, IMAGE_INSTANCE_LAYOUT_CHILDREN (p)) { Lisp_Object child = glyph_image_instance (XCAR (rest), image_instance, ERROR_ME_DEBUG_WARN, 1); struct display_box cdb; /* For losing HP-UX */ cdb.xpos = db->xpos; cdb.ypos = db->ypos; cdb.width = db->width; cdb.height = db->height; /* First determine if the image is visible at all */ if (IMAGE_INSTANCEP (child)) { Lisp_Image_Instance* childii = XIMAGE_INSTANCE (child); /* The enclosing layout offsets are +ve at this point */ struct display_glyph_area cdga; cdga.xoffset = IMAGE_INSTANCE_XOFFSET (childii) - dga->xoffset; cdga.yoffset = IMAGE_INSTANCE_YOFFSET (childii) - dga->yoffset; cdga.width = glyph_width (child, image_instance); cdga.height = glyph_height (child, image_instance); IMAGE_INSTANCE_OPTIMIZE_OUTPUT (childii) = IMAGE_INSTANCE_OPTIMIZE_OUTPUT (p); /* Although normalization is done by the output routines we have to do it here so that they don't try and clear all of db. This is true below also. */ if (redisplay_normalize_glyph_area (&cdb, &cdga)) { redisplay_normalize_display_box (&cdb, &cdga); /* Since the display boxes will now be totally in the window if they are visible at all we can now check this easily. */ if (cdb.xpos < db->xpos || cdb.ypos < db->ypos || cdb.xpos + cdb.width > db->xpos + db->width || cdb.ypos + cdb.height > db->ypos + db->height) continue; /* We have to invert the offset here as normalization will have made them positive which the output routines will treat as a truly +ve offset. */ cdga.xoffset = -cdga.xoffset; cdga.yoffset = -cdga.yoffset; switch (IMAGE_INSTANCE_TYPE (childii)) { case IMAGE_TEXT: { /* #### This is well hacked and could use some generalisation.*/ if (redisplay_normalize_glyph_area (&cdb, &cdga) && (!IMAGE_INSTANCE_OPTIMIZE_OUTPUT (childii) || IMAGE_INSTANCE_DIRTYP (childii))) { struct display_line dl; /* this is fake */ Lisp_Object string = IMAGE_INSTANCE_TEXT_STRING (childii); unsigned char charsets[NUM_LEADING_BYTES]; struct face_cachel *cachel = WINDOW_FACE_CACHEL (w, findex); DISPLAY_LINE_INIT (dl); find_charsets_in_ibyte_string (charsets, XSTRING_DATA (string), XSTRING_LENGTH (string)); ensure_face_cachel_complete (cachel, window, charsets); convert_ibyte_string_into_ichar_dynarr (XSTRING_DATA (string), XSTRING_LENGTH (string), buf); redisplay_normalize_display_box (&cdb, &cdga); /* Offsets are now +ve again so be careful when fixing up the display line. */ /* Munge boxes into display lines. */ dl.ypos = (cdb.ypos - cdga.yoffset) + glyph_ascent (child, image_instance); dl.ascent = glyph_ascent (child, image_instance); dl.descent = glyph_descent (child, image_instance); dl.top_clip = cdga.yoffset; dl.clip = (dl.ypos + dl.descent) - (cdb.ypos + cdb.height); /* output_string doesn't understand offsets in the same way as other routines - we have to add the offset to the width so that we output the full string. */ MAYBE_DEVMETH (d, output_string, (w, &dl, buf, cdb.xpos, cdga.xoffset, cdb.xpos, cdga.width + cdga.xoffset, findex, 0, 0, 0, 0)); Dynarr_reset (buf); } } break; case IMAGE_MONO_PIXMAP: case IMAGE_COLOR_PIXMAP: if (!IMAGE_INSTANCE_OPTIMIZE_OUTPUT (childii) || IMAGE_INSTANCE_DIRTYP (childii)) redisplay_output_pixmap (w, child, &cdb, &cdga, findex, 0, 0, 0, 0); break; case IMAGE_WIDGET: if (EQ (IMAGE_INSTANCE_WIDGET_TYPE (childii), Qlayout)) { redisplay_output_layout (image_instance, child, &cdb, &cdga, findex, 0, 0, 0); break; } case IMAGE_SUBWINDOW: if (!IMAGE_INSTANCE_OPTIMIZE_OUTPUT (childii) || IMAGE_INSTANCE_DIRTYP (childii)) redisplay_output_subwindow (w, child, &cdb, &cdga, findex, 0, 0, 0); break; case IMAGE_NOTHING: /* nothing is as nothing does */ break; case IMAGE_POINTER: default: ABORT (); } } IMAGE_INSTANCE_OPTIMIZE_OUTPUT (childii) = 0; } } /* Update any display properties. I'm not sure whether this actually does anything for layouts except clear the changed flags. */ redisplay_subwindow (image_instance); Dynarr_free (buf); } /**************************************************************************** redisplay_output_pixmap output a pixmap. ****************************************************************************/ void redisplay_output_pixmap (struct window *w, Lisp_Object image_instance, struct display_box* db, struct display_glyph_area* dga, face_index findex, int cursor_start, int cursor_width, int cursor_height, int offset_bitmap) { struct frame *f = XFRAME (w->frame); struct device *d = XDEVICE (f->device); Lisp_Image_Instance *p = XIMAGE_INSTANCE (image_instance); Lisp_Object window = wrap_window (w); dga->height = IMAGE_INSTANCE_PIXMAP_HEIGHT (p); dga->width = IMAGE_INSTANCE_PIXMAP_WIDTH (p); #ifdef DEBUG_REDISPLAY printf ("redisplay_output_pixmap(request) [%dx%d@%d+%d] in [%dx%d@%d+%d]\n", db->width, db->height, db->xpos, db->ypos, dga->width, dga->height, dga->xoffset, dga->yoffset); #endif /* This makes the glyph area fit into the display area. */ if (!redisplay_normalize_glyph_area (db, dga)) return; #ifdef DEBUG_REDISPLAY printf ("redisplay_output_pixmap(normalized) [%dx%d@%d+%d] in [%dx%d@%d+%d]\n", db->width, db->height, db->xpos, db->ypos, dga->width, dga->height, dga->xoffset, dga->yoffset); #endif /* Clear the area the pixmap is going into. The pixmap itself will always take care of the full width. We don't want to clear where it is going to go in order to avoid flicker. So, all we have to take care of is any area above or below the pixmap. If the pixmap has a mask in which case we have to clear the whole damn thing since we can't yet clear just the area not included in the mask. */ if (!offset_bitmap) { redisplay_clear_clipped_region (window, findex, db, dga, (IMAGE_INSTANCE_PIXMAP_MASK (p) != 0), Qnil); /* This shrinks the display box to exactly enclose the glyph area. */ redisplay_normalize_display_box (db, dga); } assert (db->xpos >= 0 && db->ypos >= 0); MAYBE_DEVMETH (d, output_pixmap, (w, image_instance, db, dga, findex, cursor_start, cursor_width, cursor_height, offset_bitmap)); } /**************************************************************************** redisplay_clear_region Clear the area in the box defined by the given parameters using the given face. This has been generalised so that subwindows can be coped with effectively. ****************************************************************************/ void redisplay_clear_region (Lisp_Object locale, face_index findex, int x, int y, int width, int height) { struct window *w = NULL; struct frame *f = NULL; struct device *d; Lisp_Object background_pixmap = Qunbound; Lisp_Object background_placement = Qunbound; Lisp_Object fcolor = Qnil, bcolor = Qnil; if (!width || !height) return; if (WINDOWP (locale)) { w = XWINDOW (locale); f = XFRAME (w->frame); } else if (FRAMEP (locale)) { w = NULL; f = XFRAME (locale); } else ABORT (); d = XDEVICE (f->device); /* if we have subwindows in the region we have to unmap them */ redisplay_unmap_subwindows_maybe (f, x, y, width, height); /* #### This isn't quite right for when this function is called from the toolbar code. */ /* #### GEOM! This uses a backing pixmap in the gutter. Correct? */ /* Don't use a backing pixmap in the border area */ if (x >= FRAME_LEFT_INTERNAL_BORDER_END (f) && x < FRAME_RIGHT_INTERNAL_BORDER_START (f) && y >= FRAME_TOP_INTERNAL_BORDER_END (f) && y < FRAME_BOTTOM_INTERNAL_BORDER_START (f)) { Lisp_Object temp; if (w) { temp = WINDOW_FACE_CACHEL_BACKGROUND_PIXMAP (w, findex); if (IMAGE_INSTANCEP (temp) && IMAGE_INSTANCE_PIXMAP_TYPE_P (XIMAGE_INSTANCE (temp))) { /* #### maybe we could implement such that a string can be a background pixmap? */ background_pixmap = temp; background_placement = WINDOW_FACE_CACHEL_BACKGROUND_PLACEMENT (w, findex); } } else { temp = FACE_BACKGROUND_PIXMAP (Vdefault_face, locale); if (IMAGE_INSTANCEP (temp) && IMAGE_INSTANCE_PIXMAP_TYPE_P (XIMAGE_INSTANCE (temp))) { background_pixmap = temp; background_placement = FACE_BACKGROUND_PLACEMENT (Vdefault_face, locale); } } } if (!UNBOUNDP (background_pixmap) && XIMAGE_INSTANCE_PIXMAP_DEPTH (background_pixmap) == 0) { if (w) { fcolor = WINDOW_FACE_CACHEL_FOREBACK (w, findex); bcolor = WINDOW_FACE_CACHEL_BACKGROUND (w, findex); } else { fcolor = FACE_FOREBACK (Vdefault_face, locale); bcolor = FACE_BACKGROUND (Vdefault_face, locale); } } else { fcolor = (w ? WINDOW_FACE_CACHEL_BACKGROUND (w, findex) : FACE_BACKGROUND (Vdefault_face, locale)); } if (UNBOUNDP (background_pixmap)) background_pixmap = Qnil; DEVMETH (d, clear_region, (locale, f, findex, x, y, width, height, fcolor, bcolor, background_pixmap, background_placement)); } /**************************************************************************** redisplay_clear_clipped_region Clear the area in the dest display_box not covered by the src display_glyph_area using the given face. This is a common occurrence for images shorter than the display line. Clipping can be played around with by altering these. glyphsrc should be normalized. ****************************************************************************/ static void redisplay_clear_clipped_region (Lisp_Object window, face_index findex, struct display_box* dest, struct display_glyph_area* glyphsrc, int fullheight_p, Lisp_Object ignored_subwindow) { /* assume dest->xpos >= 0 */ int clear_x; struct frame* f = XFRAME (XWINDOW (window)->frame); if (glyphsrc->xoffset > 0) { clear_x = dest->xpos + glyphsrc->xoffset; } else { clear_x = dest->xpos; } /* If we need the whole height cleared then just do it. */ if (fullheight_p) { redisplay_clear_region (window, findex, clear_x, dest->ypos, glyphsrc->width, dest->height); } else { int yoffset = (glyphsrc->yoffset > 0 ? glyphsrc->yoffset : 0); /* We need to make sure that subwindows are unmapped from the whole area. */ redisplay_unmap_subwindows_except_us (f, clear_x, dest->ypos, glyphsrc->width, dest->height, ignored_subwindow); /* first the top box */ if (yoffset > 0) { redisplay_clear_region (window, findex, clear_x, dest->ypos, glyphsrc->width, yoffset); } /* Then the bottom box */ if (yoffset + glyphsrc->height < dest->height) { redisplay_clear_region (window, findex, clear_x, dest->ypos + yoffset + glyphsrc->height, glyphsrc->width, dest->height - (yoffset + glyphsrc->height)); } } } /***************************************************************************** redisplay_normalize_glyph_area redisplay_normalize_display_box Calculate the visible box for displaying glyphsrc in dest. display_box and display_glyph_area are used to represent an area to displayed and where to display it. Using these two structures all combinations of clipping and position can be accommodated. dest - display_box xpos - absolute horizontal position of area. ypos - absolute vertical position of area. glyphsrc - display_glyph_area xoffset - horizontal offset of the glyph, +ve means display the glyph with the x position offset by xoffset, -ve means display starting xoffset into the glyph. yoffset - vertical offset of the glyph, +ve means display the glyph with y position offset by yoffset, -ve means display starting xoffset into the glyph. ****************************************************************************/ int redisplay_normalize_glyph_area (struct display_box* dest, struct display_glyph_area* glyphsrc) { if (dest->xpos + glyphsrc->xoffset > dest->xpos + dest->width || dest->ypos + glyphsrc->yoffset > dest->ypos + dest->height || -glyphsrc->xoffset >= glyphsrc->width || -glyphsrc->yoffset >= glyphsrc->height || /* #### Not sure why this wasn't coped with before but normalizing to zero width or height is definitely wrong. */ (dest->xpos + glyphsrc->xoffset + glyphsrc->width > dest->xpos + dest->width && dest->width - glyphsrc->xoffset <= 0) || (dest->ypos + glyphsrc->yoffset + glyphsrc->height > dest->ypos + dest->height && dest->height - glyphsrc->yoffset <= 0)) { /* It's all clipped out */ return 0; } /* Horizontal offsets. This works because xoffset can be -ve as well as +ve. When we enter this function the glyphsrc width and height are set to the actual glyph width and height irrespective of how much can be displayed. We are trying to clip both the offset into the image and the rightmost bounding box. Its possible for the glyph width to be much larger than the area we are displaying into (e.g. a large glyph in a small frame). */ if (dest->xpos + glyphsrc->xoffset + glyphsrc->width > dest->xpos + dest->width) { /* glyphsrc offset is +ve we are trying to display offset from the origin (the bounding box contains some space and then the glyph). At most the width we want to display is dest->width - glyphsrc->xoffset. */ if (glyphsrc->xoffset > 0) glyphsrc->width = dest->width - glyphsrc->xoffset; /* glyphsrc offset is -ve we are trying to display hard up against the dest corner inset into the glyphsrc by xoffset.*/ else if (glyphsrc->xoffset < 0) { glyphsrc->width += glyphsrc->xoffset; glyphsrc->width = min (glyphsrc->width, dest->width); } else glyphsrc->width = dest->width; } else if (glyphsrc->xoffset < 0) glyphsrc->width += glyphsrc->xoffset; /* Vertical offsets. This works because yoffset can be -ve as well as +ve */ if (dest->ypos + glyphsrc->yoffset + glyphsrc->height > dest->ypos + dest->height) { if ((glyphsrc->yoffset > 0) && (dest->height > glyphsrc->yoffset)) glyphsrc->height = dest->height - glyphsrc->yoffset; else if (glyphsrc->yoffset < 0) { glyphsrc->height += glyphsrc->yoffset; glyphsrc->height = min (glyphsrc->height, dest->height); } else glyphsrc->height = dest->height; } else if (glyphsrc->yoffset < 0) glyphsrc->height += glyphsrc->yoffset; return 1; } static void redisplay_normalize_display_box (struct display_box* dest, struct display_glyph_area* glyphsrc) { /* Adjust the destination area. At the end of this the destination area will exactly enclose the glyph area. The only remaining adjustment will be offsets into the glyph area. */ /* Horizontal adjustment. */ if (glyphsrc->xoffset > 0) { dest->xpos += glyphsrc->xoffset; dest->width -= glyphsrc->xoffset; glyphsrc->xoffset = 0; } else glyphsrc->xoffset = -glyphsrc->xoffset; if (glyphsrc->width < dest->width) dest->width = glyphsrc->width; /* Vertical adjustment. */ if (glyphsrc->yoffset > 0) { dest->ypos += glyphsrc->yoffset; dest->height -= glyphsrc->yoffset; glyphsrc->yoffset = 0; } else glyphsrc->yoffset = -glyphsrc->yoffset; if (glyphsrc->height < dest->height) dest->height = glyphsrc->height; } /***************************************************************************** redisplay_display_boxes_in_window_p Determine whether the required display_glyph_area is completely inside the window. -1 means the display_box is not in the window. 1 means the display_box and the display_glyph_area are in the window. 0 means the display_box is in the window but the display_glyph_area is not. ****************************************************************************/ static int redisplay_display_boxes_in_window_p (struct window* w, struct display_box* db, struct display_glyph_area* dga) { int left = WINDOW_TEXT_LEFT (w); int right = WINDOW_TEXT_RIGHT (w); int top = WINDOW_TEXT_TOP (w); int bottom = WINDOW_TEXT_BOTTOM (w); if (db->xpos < left || db->ypos < top || db->xpos + db->width > right || db->ypos + db->height > bottom) /* We are not displaying in a window at all */ return -1; if (db->xpos + dga->xoffset >= left && db->ypos + dga->yoffset >= top && db->xpos + dga->xoffset + dga->width <= right && db->ypos + dga->yoffset + dga->height <= bottom) return 1; return 0; } /***************************************************************************** redisplay_calculate_display_boxes Convert from rune/display_line co-ordinates to display_box co-ordinates. ****************************************************************************/ int redisplay_calculate_display_boxes (struct display_line *dl, int xpos, int xoffset, int yoffset, int start_pixpos, int width, struct display_box* dest, struct display_glyph_area* src) { dest->xpos = xpos; dest->ypos = DISPLAY_LINE_YPOS (dl); dest->width = width; dest->height = DISPLAY_LINE_HEIGHT (dl); src->xoffset = -xoffset; src->width = 0; src->height = 0; src->yoffset = -dl->top_clip + yoffset; if (start_pixpos >=0 && start_pixpos > xpos) { /* Oops, we're asking for a start outside of the displayable area. */ if (start_pixpos > xpos + width) return 0; dest->xpos = start_pixpos; dest->width -= (start_pixpos - xpos); /* Offsets are -ve when we want to clip pixels off the displayed glyph. */ src->xoffset -= (start_pixpos - xpos); } return 1; } /***************************************************************************** redisplay_clear_top_of_window If window is topmost, clear the internal border above it. ****************************************************************************/ void redisplay_clear_top_of_window (struct window *w) { Lisp_Object window = wrap_window (w); /* #### GEOM! FIXME #### This is definitely wrong. It was clearly not fixed up to accommodate the gutter. The internal border width is now no longer adjacent to the leftmost window, since the gutter intervenes. */ if (!NILP (Fwindow_highest_p (window))) { struct frame *f = XFRAME (w->frame); int x, y, width, height; x = w->pixel_left; width = w->pixel_width; if (window_is_leftmost (w)) { x -= FRAME_INTERNAL_BORDER_WIDTH (f); width += FRAME_INTERNAL_BORDER_WIDTH (f); } if (window_is_rightmost (w)) width += FRAME_INTERNAL_BORDER_WIDTH (f); /* #### This off-by-one stuff also occurs in XLIKE_clear_frame(). */ y = FRAME_TOP_INTERNAL_BORDER_START (f) - 1; height = FRAME_INTERNAL_BORDER_HEIGHT (f) + 1; redisplay_clear_region (window, DEFAULT_INDEX, x, y, width, height); } } /***************************************************************************** redisplay_clear_to_window_end Clear the area between ypos1 and ypos2. Each margin area and the text area is handled separately since they may each have their own background color. ****************************************************************************/ void redisplay_clear_to_window_end (struct window *w, int ypos1, int ypos2) { struct frame *f = XFRAME (w->frame); struct device *d = XDEVICE (f->device); if (HAS_DEVMETH_P (d, clear_to_window_end)) DEVMETH (d, clear_to_window_end, (w, ypos1, ypos2)); else { int height = ypos2 - ypos1; if (height) { Lisp_Object window; int bflag = 0 ; /* (window_needs_vertical_divider (w) ? 0 : 1);*/ layout_bounds bounds; bounds = calculate_display_line_boundaries (w, bflag); window = wrap_window (w); if (window_is_leftmost (w)) redisplay_clear_region (window, DEFAULT_INDEX, FRAME_LEFT_INTERNAL_BORDER_START (f), ypos1, FRAME_INTERNAL_BORDER_WIDTH (f), height); if (bounds.left_in - bounds.left_out > 0) redisplay_clear_region (window, get_builtin_face_cache_index (w, Vleft_margin_face), bounds.left_out, ypos1, bounds.left_in - bounds.left_out, height); if (bounds.right_in - bounds.left_in > 0) redisplay_clear_region (window, DEFAULT_INDEX, bounds.left_in, ypos1, bounds.right_in - bounds.left_in, height); if (bounds.right_out - bounds.right_in > 0) redisplay_clear_region (window, get_builtin_face_cache_index (w, Vright_margin_face), bounds.right_in, ypos1, bounds.right_out - bounds.right_in, height); if (window_is_rightmost (w)) redisplay_clear_region (window, DEFAULT_INDEX, FRAME_RIGHT_INTERNAL_BORDER_START (f), ypos1, FRAME_INTERNAL_BORDER_WIDTH (f), height); } } } /***************************************************************************** redisplay_clear_bottom_of_window Clear window from right below the last display line to right above the modeline. The calling function can limit the area actually erased by setting min_start and/or max_end to positive values. ****************************************************************************/ void redisplay_clear_bottom_of_window (struct window *w, display_line_dynarr *ddla, int min_start, int max_end) { struct frame *f = XFRAME (w->frame); int ypos1, ypos2; int ddla_len = Dynarr_length (ddla); ypos2 = WINDOW_TEXT_BOTTOM (w); #ifdef HAVE_SCROLLBARS /* This adjustment is to catch the intersection of any scrollbars. */ if (f->windows_structure_changed && NILP (w->scrollbar_on_top_p)) ypos2 += window_scrollbar_height (w); #endif if (ddla_len) { if (ddla_len == 1 && Dynarr_begin (ddla)->modeline) { ypos1 = WINDOW_TEXT_TOP (w); #ifdef HAVE_SCROLLBARS /* This adjustment is to catch the intersection of any scrollbars. */ if (f->windows_structure_changed && !NILP (w->scrollbar_on_top_p)) ypos1 -= window_scrollbar_height (w); #endif } else { struct display_line *dl = Dynarr_atp (ddla, ddla_len - 1); ypos1 = dl->ypos + dl->descent - dl->clip; } } else ypos1 = WINDOW_TEXT_TOP (w); /* #### See if this can be made conditional on the frame changing size. */ if (MINI_WINDOW_P (w)) ypos2 += FRAME_INTERNAL_BORDER_HEIGHT (f); if (min_start >= 0 && ypos1 < min_start) ypos1 = min_start; if (max_end >= 0 && ypos2 > max_end) ypos2 = max_end; if (ypos2 <= ypos1) return; redisplay_clear_to_window_end (w, ypos1, ypos2); } /***************************************************************************** redisplay_update_line This is used during incremental updates to update a single line and correct the offsets on all lines below it. At the moment update_values is false if we are only updating the modeline. ****************************************************************************/ void redisplay_update_line (struct window *w, int first_line, int last_line, int update_values) { struct frame *f = XFRAME (w->frame); struct device *d = XDEVICE (f->device); display_line_dynarr *cdla = window_display_lines (w, CURRENT_DISP); display_line_dynarr *ddla = window_display_lines (w, DESIRED_DISP); MAYBE_DEVMETH (d, window_output_begin, (w)); while (first_line <= last_line) { Charcount old_len = (Dynarr_atp (cdla, first_line)->end_charpos - Dynarr_atp (cdla, first_line)->charpos); Charcount new_len = (Dynarr_atp (ddla, first_line)->end_charpos - Dynarr_atp (ddla, first_line)->charpos); assert (Dynarr_length (cdla) == Dynarr_length (ddla)); /* Output the changes. */ output_display_line (w, cdla, ddla, first_line, -1, -1); /* Update the offsets. */ if (update_values) { int cur_line = first_line + 1; while (cur_line < Dynarr_length (cdla)) { Dynarr_atp (cdla, cur_line)->offset += (new_len - old_len); Dynarr_atp (ddla, cur_line)->offset += (new_len - old_len); cur_line++; } } /* Update the window_end_pos and other settings. */ if (update_values) { w->window_end_pos[CURRENT_DISP] -= (new_len - old_len); if (Dynarr_atp (ddla, first_line)->cursor_elt != -1) { w->last_point_x[CURRENT_DISP] = w->last_point_x[DESIRED_DISP]; w->last_point_y[CURRENT_DISP] = w->last_point_y[DESIRED_DISP]; } } first_line++; } /* Update the window max line length. We have to scan the entire set of display lines otherwise we might not detect if the max is supposed to shrink. */ if (update_values) { int line = 0; w->max_line_len = 0; while (line < Dynarr_length (ddla)) { struct display_line *dl = Dynarr_atp (ddla, line); if (!dl->modeline) w->max_line_len = max (dl->num_chars, w->max_line_len); line++; } } w->last_modified[CURRENT_DISP] = w->last_modified[DESIRED_DISP]; w->last_facechange[CURRENT_DISP] = w->last_facechange[DESIRED_DISP]; Fset_marker (w->last_point[CURRENT_DISP], Fmarker_position (w->last_point[DESIRED_DISP]), w->buffer); Fset_marker (w->last_start[CURRENT_DISP], Fmarker_position (w->last_start[DESIRED_DISP]), w->buffer); /* We don't bother updating the vertical scrollbars here. This gives us a performance increase while having minimal loss of quality to the scrollbar slider size and position since when this function is called we know that the changes to the buffer were very localized. We have to update the horizontal scrollbars, though, because this routine could cause a change which has a larger impact on their sizing. */ /* #### See if we can get away with only calling this if max_line_len is greater than the window_char_width. */ /* #### BILL!!! Should we do this for GTK as well? */ #if defined(HAVE_SCROLLBARS) && defined(HAVE_X_WINDOWS) { extern int stupid_vertical_scrollbar_drag_hack; update_window_scrollbars (w, NULL, 1, stupid_vertical_scrollbar_drag_hack); stupid_vertical_scrollbar_drag_hack = 1; } #endif redisplay_redraw_cursor (f, 0); MAYBE_DEVMETH (d, window_output_end, (w)); } /***************************************************************************** redisplay_output_window For the given window W, ensure that the current display lines are equal to the desired display lines, outputing changes as necessary. #### Fuck me. This just isn't going to cut it for tty's. The output decisions for them must be based on the contents of the entire frame because that is how the available output capabilities think. The solution is relatively simple. Create redisplay_output_frame. This will basically merge all of the separate window display structs into a single one for the frame. This combination structure will be able to be passed to the same output_display_line which works for windows on X frames and the right things will happen. It just takes time to do. ****************************************************************************/ void redisplay_output_window (struct window *w) { struct frame *f = XFRAME (w->frame); struct device *d = XDEVICE (f->device); display_line_dynarr *cdla = window_display_lines (w, CURRENT_DISP); display_line_dynarr *ddla = window_display_lines (w, DESIRED_DISP); int cdla_len = Dynarr_length (cdla); int ddla_len = Dynarr_length (ddla); int line; int need_to_clear_bottom = 0; int need_to_clear_start = -1; int need_to_clear_end = -1; /* Backgrounds may have changed or windows may have gone away leaving dividers lying around. */ if (f->faces_changed || f->windows_structure_changed || w->shadow_thickness_changed) need_to_clear_bottom = 1; /* The first thing we do is determine if we are going to need to clear the bottom of the window. We only need to do this if the bottom of the current display lines is below the bottom of the desired display lines. Note that the number of lines is irrelevant. Only the position matters. We also clear to the bottom of the window if the modeline has shifted position. */ /* #### We can't blindly not clear the bottom if f->clear is true since there might be a window-local background. However, for those cases where there isn't, clearing the end of the window in this case sucks. */ if (!need_to_clear_bottom) { struct display_line *cdl, *ddl; /* If the modeline has changed position or size, clear the bottom of the window. */ if (!need_to_clear_bottom) { cdl = ddl = 0; if (cdla_len) cdl = Dynarr_begin (cdla); if (ddla_len) ddl = Dynarr_begin (ddla); if (!cdl || !ddl) need_to_clear_bottom = 1; else if ((!cdl->modeline && ddl->modeline) || (cdl->modeline && !ddl->modeline)) need_to_clear_bottom = 1; else if (cdl->ypos != ddl->ypos || cdl->ascent != ddl->ascent || cdl->descent != ddl->descent || cdl->clip != ddl->clip || cdl->clear_findex != ddl->clear_findex) need_to_clear_bottom = 1; /* #### This kludge is to make sure the modeline shadows get redrawn if the modeline position shifts. */ if (need_to_clear_bottom) w->shadow_thickness_changed = 1; } if (!need_to_clear_bottom) { cdl = ddl = 0; if (cdla_len) cdl = Dynarr_atp (cdla, cdla_len - 1); if (ddla_len) ddl = Dynarr_atp (ddla, ddla_len - 1); if (!cdl || !ddl) need_to_clear_bottom = 1; else { int cdl_bottom, ddl_bottom; cdl_bottom = cdl->ypos + cdl->descent; ddl_bottom = ddl->ypos + ddl->descent; if (cdl_bottom > ddl_bottom) { need_to_clear_bottom = 1; need_to_clear_start = ddl_bottom; need_to_clear_end = cdl_bottom; } } } } /* Perform any output initialization. */ MAYBE_DEVMETH (d, window_output_begin, (w)); /* If the window's structure has changed clear the internal border above it if it is topmost (the function will check). */ if (f->windows_structure_changed || f->faces_changed) redisplay_clear_top_of_window (w); /* Output each line. */ for (line = 0; line < Dynarr_length (ddla); line++) { output_display_line (w, cdla, ddla, line, -1, -1); } /* If the number of display lines has shrunk, adjust. */ if (cdla_len > ddla_len) { Dynarr_set_lengthr (cdla, ddla_len); } /* Output a vertical divider between windows, if necessary. */ if (window_needs_vertical_divider (w) && (f->windows_structure_changed || f->clear)) { MAYBE_DEVMETH (d, output_vertical_divider, (w, f->windows_structure_changed)); } /* Clear the rest of the window, if necessary. */ if (need_to_clear_bottom) { redisplay_clear_bottom_of_window (w, ddla, need_to_clear_start, need_to_clear_end); } w->window_end_pos[CURRENT_DISP] = w->window_end_pos[DESIRED_DISP]; Fset_marker (w->start[CURRENT_DISP], make_fixnum (marker_position (w->start[DESIRED_DISP])), w->buffer); Fset_marker (w->pointm[CURRENT_DISP], make_fixnum (marker_position (w->pointm[DESIRED_DISP])), w->buffer); w->last_modified[CURRENT_DISP] = w->last_modified[DESIRED_DISP]; w->last_facechange[CURRENT_DISP] = w->last_facechange[DESIRED_DISP]; Fset_marker (w->last_start[CURRENT_DISP], Fmarker_position (w->last_start[DESIRED_DISP]), w->buffer); Fset_marker (w->last_point[CURRENT_DISP], Fmarker_position (w->last_point[DESIRED_DISP]), w->buffer); w->last_point_x[CURRENT_DISP] = w->last_point_x[DESIRED_DISP]; w->last_point_y[CURRENT_DISP] = w->last_point_y[DESIRED_DISP]; w->shadow_thickness_changed = 0; set_window_display_buffer (w, XBUFFER (w->buffer)); find_window_mirror (w)->truncate_win = window_truncation_on (w); /* Overkill on invalidating the cache. It is very bad for it to not get invalidated when it should be. */ INVALIDATE_DEVICE_PIXEL_TO_GLYPH_CACHE (d); redisplay_redraw_cursor (f, 0); MAYBE_DEVMETH (d, window_output_end, (w)); #ifdef HAVE_SCROLLBARS update_window_scrollbars (w, NULL, !MINI_WINDOW_P (w), 0); #endif } /***************************************************************************** redisplay_redraw_exposed_window Given a bounding box for an area that needs to be redrawn, determine what parts of what lines are contained within and re-output their contents. ****************************************************************************/ static void redisplay_redraw_exposed_window (struct window *w, int x, int y, int width, int height) { struct frame *f = XFRAME (w->frame); int line; int start_x, start_y, end_x, end_y; int orig_windows_structure_changed; display_line_dynarr *cdla = window_display_lines (w, CURRENT_DISP); if (!NILP (w->vchild)) { redisplay_redraw_exposed_windows (w->vchild, x, y, width, height); return; } else if (!NILP (w->hchild)) { redisplay_redraw_exposed_windows (w->hchild, x, y, width, height); return; } /* If the window doesn't intersect the exposed region, we're done here. */ if (x >= WINDOW_RIGHT (w) || (x + width) <= WINDOW_LEFT (w) || y >= WINDOW_BOTTOM (w) || (y + height) <= WINDOW_TOP (w)) { return; } else { start_x = max (WINDOW_LEFT (w), x); end_x = min (WINDOW_RIGHT (w), (x + width)); start_y = max (WINDOW_TOP (w), y); end_y = min (WINDOW_BOTTOM (w), y + height); /* We do this to make sure that the 3D modelines get redrawn if they are in the exposed region. */ orig_windows_structure_changed = f->windows_structure_changed; f->windows_structure_changed = 1; } /* #### Not in GTK or MS Windows. I think is because of toolbars, which are handled as widgets in GTK and MS Windows, but drawn ourselves in X. For the moment I'm leaving this in, if it causes problems we have some device method indicating whether we're drawing our own toolbars. */ redisplay_clear_top_of_window (w); if (window_needs_vertical_divider (w)) { FRAMEMETH (f, output_vertical_divider, (w, 0)); } for (line = 0; line < Dynarr_length (cdla); line++) { struct display_line *cdl = Dynarr_atp (cdla, line); int top_y = DISPLAY_LINE_YPOS (cdl); int bottom_y = DISPLAY_LINE_YPOS (cdl) + DISPLAY_LINE_HEIGHT (cdl); if (bottom_y >= start_y) { if (top_y > end_y) { if (line == 0) continue; else break; } else { output_display_line (w, 0, cdla, line, start_x, end_x); } } } f->windows_structure_changed = orig_windows_structure_changed; /* If there have never been any face cache_elements created, then this expose event doesn't actually have anything to do. */ if (Dynarr_largest (w->face_cachels)) redisplay_clear_bottom_of_window (w, cdla, start_y, end_y); #ifdef HAVE_SCROLLBARS MAYBE_FRAMEMETH (f, redisplay_deadbox, (w, x, y, width, height)); #endif } /***************************************************************************** redisplay_redraw_exposed_windows For each window beneath the given window in the window hierarchy, ensure that it is redrawn if necessary after an Expose event. ****************************************************************************/ static void redisplay_redraw_exposed_windows (Lisp_Object window, int x, int y, int width, int height) { for (; !NILP (window); window = XWINDOW (window)->next) redisplay_redraw_exposed_window (XWINDOW (window), x, y, width, height); } static void redisplay_redraw_exposed_area_1 (Lisp_Object arg) { assert (!in_display); redisplay_redraw_exposed_area (XFRAME (X1ST (arg)), XFIXNUM (X2ND (arg)), XFIXNUM (X3RD (arg)), XFIXNUM (X4TH (arg)), XFIXNUM (X5TH (arg))); free_list (arg); } /***************************************************************************** redisplay_redraw_exposed_area For each window on the given frame, ensure that any area in the Exposed area is redrawn. ****************************************************************************/ void redisplay_redraw_exposed_area (struct frame *f, int x, int y, int width, int height) { int depth; if (in_display) { /* Not safe to do it now, so delay it */ register_post_redisplay_action (redisplay_redraw_exposed_area_1, list5 (wrap_frame (f), make_fixnum (x), make_fixnum (y), make_fixnum (width), make_fixnum (height))); return; } depth = enter_redisplay_critical_section (); MAYBE_FRAMEMETH (f, frame_output_begin, (f)); /* If any window on the frame has had its face cache reset then the redisplay structures are effectively invalid. If we attempt to use them we'll blow up. We mark the frame as changed to ensure that redisplay will do a full update. This probably isn't necessary but it can't hurt. */ #ifdef HAVE_TOOLBARS /* #### We would rather put these off as well but there is currently no combination of flags which will force an unchanged toolbar to redraw anyhow. */ MAYBE_FRAMEMETH (f, redraw_exposed_toolbars, (f, x, y, width, height)); #endif redraw_exposed_gutters (f, x, y, width, height); if (!f->window_face_cache_reset) { redisplay_redraw_exposed_windows (f->root_window, x, y, width, height); /* #### Why not call this always? */ MAYBE_FRAMEMETH (f, frame_output_end, (f)); } else MARK_FRAME_CHANGED (f); exit_redisplay_critical_section (depth); } /***************************************************************************** bevel_modeline Draw a 3d border around the modeline on window W. ****************************************************************************/ void bevel_modeline (struct window *w, struct display_line *dl) { struct frame *f = XFRAME (w->frame); struct device *d = XDEVICE (f->device); int x, y, width, height; int shadow_thickness = MODELINE_SHADOW_THICKNESS (w); enum edge_style style; x = WINDOW_MODELINE_LEFT (w); width = WINDOW_MODELINE_RIGHT (w) - x; y = dl->ypos - dl->ascent - shadow_thickness; height = dl->ascent + dl->descent + 2 * shadow_thickness; if (XFIXNUM (w->modeline_shadow_thickness) < 0) { style = EDGE_BEVEL_IN; } else { style = EDGE_BEVEL_OUT; } MAYBE_DEVMETH (d, bevel_area, (w, MODELINE_INDEX, x, y, width, height, shadow_thickness, EDGE_ALL, style)); }