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- /* Synchronize redisplay structures and output changes.
- Copyright (C) 1994, 1995 Board of Trustees, University of Illinois
-
- 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 2, 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; see the file COPYING. If not, write to the Free
- Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* Synched up with: Not in FSF. */
-
- /* This file has been Mule-ized. */
-
- /* Author: Chuck Thompson */
-
- #include <config.h>
- #include "lisp.h"
- #include "debug.h"
-
- #include "buffer.h"
- #include "window.h"
- #include "frame.h"
- #include "device.h"
- #include "glyphs.h"
- #include "redisplay.h"
- #include "faces.h"
-
- #include "sysdep.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);
- void redisplay_output_window (struct window *w);
-
- /*****************************************************************************
- sync_rune_structs
-
- Synchronize the given rune blocks.
- ****************************************************************************/
- static void
- sync_rune_structs (struct window *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_size (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.
- ****************************************************************************/
- static void
- sync_display_line_structs (struct window *w, int line, int do_blocks,
- display_line_dynarr *cdla,
- display_line_dynarr *ddla)
- {
- int cdla_len = Dynarr_length (cdla);
-
- struct display_line dl, *clp, *dlp;
- int db_elt;
-
- dlp = Dynarr_atp (ddla, line);
- if (line >= Dynarr_largest (cdla))
- {
- clp = &dl;
- clp->display_blocks = Dynarr_new (struct display_block);
- }
- 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 >= cdla_len)
- {
- Dynarr_add (cdla, *clp);
- return;
- }
-
- 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 (struct 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_increment (clp->display_blocks);
- }
-
- sync_rune_structs (w, cdb->runes, ddb->runes);
- }
-
- if (line >= cdla_len)
- Dynarr_add (cdla, *clp);
- }
-
- /*****************************************************************************
- compare_runes
-
- Compare to 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 bufpos and endpos. They do not
- affect the display characteristics. */
-
- if ((crb->findex != drb->findex) ||
- (FACE_CACHE_ELEMENT_DIRTY (w, drb->findex)))
- return 0;
- else if (!EQ (crb->extent, drb->extent))
- return 0;
- else 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 == CHAR && (crb->object.ch != drb->object.ch))
- return 0;
- else if (crb->type == DGLYPH &&
- (!EQ (crb->object.dglyph.glyph, drb->object.dglyph.glyph) ||
- crb->object.dglyph.xoffset != drb->object.dglyph.xoffset))
- return 0;
- else if (crb->type == HLINE &&
- (crb->object.hline.thickness != drb->object.hline.thickness ||
- crb->object.hline.yoffset != drb->object.hline.yoffset))
- return 0;
- else
- return 1;
- }
-
- /*****************************************************************************
- 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 ();
- }
-
- 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 device *d = XDEVICE (XFRAME (w->frame)->device);
- struct rune *rb;
- struct font_metric_info fm;
-
- if (Dynarr_length (db->runes) <= cursor_location)
- abort ();
-
- rb = Dynarr_atp (db->runes, cursor_location);
- *cursor_start = rb->xpos;
-
- DEVMETH (d, font_metric_info, (d, FACE_CACHE_ELEMENT_FONT (w, DEFAULT_INDEX),
- &fm));
- *cursor_height = fm.height;
-
- if (rb->type == BLANK)
- *cursor_width = fm.width;
- 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 device *d = XDEVICE (f->device);
-
- struct display_block *cdb, *ddb;
- int start_pos;
- int stop_pos;
- int force = 0;
- int block_end;
-
- 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));
-
- block_end =
- (!Dynarr_length (ddb->runes)
- ? 0
- : (Dynarr_atp (ddb->runes, Dynarr_length (ddb->runes) - 1)->xpos +
- Dynarr_atp (ddb->runes, Dynarr_length (ddb->runes) - 1)->width));
-
- /* 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
- && ((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)))
- force = 1;
-
- if (f->windows_structure_changed ||
- f->faces_changed ||
- cdl->ypos != ddl->ypos ||
- cdl->ascent != ddl->ascent ||
- cdl->descent != ddl->descent ||
- cdl->clip != ddl->clip ||
- 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;
- }
-
- DEVMETH (d, 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);
- struct device *d = XDEVICE (f->device);
- Lisp_Object window;
-
- XSETWINDOW (window, w);
- DEVMETH (d, clear_region, (window, DEFAULT_INDEX,
- FRAME_LEFT_BORDER_START (f), y,
- FRAME_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);
- struct device *d = XDEVICE (f->device);
- Lisp_Object window;
-
- XSETWINDOW (window, w);
- DEVMETH (d, clear_region, (window, DEFAULT_INDEX,
- FRAME_RIGHT_BORDER_START (f),
- y, FRAME_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 device *d = XDEVICE (f->device);
- 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;
- }
-
- ddl = Dynarr_atp (ddla, line); /* assert line < Dynarr_length (ddla) */
- 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_atp (ddba, 0);
- 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 necesssary 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
- {
- DEVMETH (d, 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->clip != ddl->clip)))
- {
- int x, y, width, height;
- Lisp_Object face;
-
- must_sync = 1;
- x = start_pixpos;
- y = ddl->ypos - ddl->ascent;
- width = min (next_start_pixpos, block_end) - x;
- height = ddl->ascent + ddl->descent - ddl->clip;
-
- if (x < ddl->bounds.left_in)
- face = Vleft_margin_face;
- else if (x < ddl->bounds.right_in)
- face = Vdefault_face;
- else if (x < ddl->bounds.right_out)
- face = Vright_margin_face;
- else
- face = Qnil;
-
- if (!NILP (face))
- {
- Lisp_Object window;
-
- XSETWINDOW (window, w);
-
- /* Clear the empty area. */
- DEVMETH (d, clear_region,
- (window, get_builtin_face_cache_index (w, face),
- 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 && 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;
- DEVMETH (d, 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 = ddl->ypos - ddl->ascent;
- int height = ddl->ascent + ddl->descent - ddl->clip;
-
- 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_BUFPOS (rb->bufpos + dl->offset)
- #define ADJ_ENDPOS (rb->endpos + dl->offset)
-
- int
- redisplay_move_cursor (struct window *w, Bufpos 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];
-
- 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_BUFPOS == new_point
- || (ADJ_ENDPOS && (new_point >= ADJ_BUFPOS)
- && (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_number (ADJ_BUFPOS),
- w->buffer);
- dl->cursor_elt = x;
- return 1;
- }
- else
- {
- DEVMETH (d, output_begin, (d));
-
- /* #### This is a gross kludge. Cursor handling is such a royal
- pain in the ass. */
- if (rb->type == DGLYPH &&
- (EQ (rb->object.dglyph.glyph, Vtruncation_glyph) ||
- EQ (rb->object.dglyph.glyph, Vcontinuation_glyph)))
- rb->cursor_type = NO_CURSOR;
- else
- 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)
- DEVMETH (d, output_end, (d));
-
- 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_atp (db->runes, 0);
- 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)
- DEVMETH (d, output_end, (d));
- return 1;
- }
- else
- {
- int cur_rb = 0;
- int first = 0;
- int cur_dl, up;
-
- if (ADJ_BUFPOS < new_point)
- {
- up = 1;
- cur_rb = x + 1;
- cur_dl = y;
- }
- else /* (rb->bufpos + 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_BUFPOS == new_point
- || (ADJ_ENDPOS && (new_point >= ADJ_BUFPOS)
- && (new_point <= ADJ_BUFPOS))))
- {
- 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_number (ADJ_BUFPOS), w->buffer);
-
- if (!no_output_end)
- DEVMETH (d, output_end, (d));
- return 1;
- }
-
- (up ? cur_rb++ : cur_rb--);
- }
-
- (up ? (cur_rb = 0) : (first = 0));
- (up ? cur_dl++ : cur_dl--);
- }
- }
-
- if (!no_output_end)
- DEVMETH (d, output_end, (d));
- return 0;
- }
- #undef ADJ_BUFPOS
- #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 (y < 0 || y >= Dynarr_length (dla))
- return;
-
- if (MINI_WINDOW_P (w) && f != device_selected_frame (d))
- 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)
- {
- if (run_end_begin_meths)
- DEVMETH (d, output_begin, (d));
-
- output_display_line (w, 0, dla, y, rb->xpos, rb->xpos + rb->width);
-
- if (run_end_begin_meths)
- DEVMETH (d, output_end, (d));
- }
- }
-
- /*****************************************************************************
- 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)
- {
- struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f));
-
- redraw_cursor_in_window (w, run_end_begin_meths);
- }
-
- /*****************************************************************************
- redisplay_clear_top_of_window
-
- If window is topmost, clear the internal border above it.
- ****************************************************************************/
- static void
- redisplay_clear_top_of_window (struct window *w)
- {
- Lisp_Object window;
- XSETWINDOW (window, w);
-
- if (!NILP (Fwindow_highest_p (window)))
- {
- struct frame *f = XFRAME (w->frame);
- struct device *d = XDEVICE (f->device);
- int x, y, width, height;
-
- x = w->pixel_left;
- width = w->pixel_width;
-
- if (window_is_leftmost (w))
- {
- x -= FRAME_BORDER_WIDTH (f);
- width += FRAME_BORDER_WIDTH (f);
- }
- if (window_is_rightmost (w))
- width += FRAME_BORDER_WIDTH (f);
-
- y = FRAME_TOP_BORDER_START (f) - 1;
- height = FRAME_BORDER_HEIGHT (f) + 1;
-
- DEVMETH (d, clear_region, (window, DEFAULT_INDEX, x, y, width, 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);
- struct device *d = XDEVICE (f->device);
- int ypos1, ypos2;
- int ddla_len = Dynarr_length (ddla);
-
- ypos2 = WINDOW_TEXT_BOTTOM (w);
- /* This adjustment is to catch the intersection of any scrollbars. */
- if (f->windows_structure_changed && !f->scrollbar_on_top)
- ypos2 += window_scrollbar_height (w);
-
- if (ddla_len)
- {
- if (ddla_len == 1 && Dynarr_atp (ddla, 0)->modeline)
- {
- ypos1 = WINDOW_TEXT_TOP (w);
- /* This adjustment is to catch the intersection of any scrollbars. */
- if (f->windows_structure_changed && f->scrollbar_on_top)
- ypos1 -= window_scrollbar_height (w);
- }
- 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_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;
-
- DEVMETH (d, 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);
-
- DEVMETH (d, output_begin, (d));
-
- while (first_line <= last_line)
- {
- Charcount old_len = (Dynarr_atp (cdla, first_line)->end_bufpos -
- Dynarr_atp (cdla, first_line)->bufpos);
- Charcount new_len = (Dynarr_atp (ddla, first_line)->end_bufpos -
- Dynarr_atp (ddla, first_line)->bufpos);
-
- 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. */
- update_window_scrollbars (w, NULL, 1, 1);
-
- /* This has to be done after we've updated the values. We don't
- call output_end for tty frames. Redisplay will do this after all
- tty windows have been updated. This cuts down on cursor
- flicker. */
- if (FRAME_IS_TTY (f))
- redisplay_redraw_cursor (f, 0);
- else
- DEVMETH (d, output_end, (d));
- }
-
- /*****************************************************************************
- 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_atp (cdla, 0);
- if (ddla_len)
- ddl = Dynarr_atp (ddla, 0);
-
- 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)
- 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. */
- DEVMETH (d, output_begin, (d));
-
- /* 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)
- 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_length (cdla) = ddla_len;
- }
-
- /* Output a vertical divider between windows, if necessary. */
- if (window_needs_vertical_divider (w)
- && (f->windows_structure_changed || f->clear))
- {
- 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_number (marker_position (w->start[DESIRED_DISP])),
- w->buffer);
- Fset_marker (w->pointm[CURRENT_DISP],
- make_number (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);
-
- /* We don't call output_end for tty frames. Redisplay will do this
- after all tty windows have been updated. This cuts down on
- cursor flicker. */
- if (FRAME_IS_TTY (f))
- redisplay_redraw_cursor (f, 0);
- else
- DEVMETH (d, output_end, (d));
-
- update_window_scrollbars (w, NULL, !MINI_WINDOW_P (w), 0);
- }
-