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Diffstat (limited to 'src/fe-text/textbuffer-view.c')
| -rw-r--r-- | src/fe-text/textbuffer-view.c | 1059 |
1 files changed, 1059 insertions, 0 deletions
diff --git a/src/fe-text/textbuffer-view.c b/src/fe-text/textbuffer-view.c new file mode 100644 index 00000000..c1d83ac6 --- /dev/null +++ b/src/fe-text/textbuffer-view.c @@ -0,0 +1,1059 @@ +/* + textbuffer-view.c : Text buffer handling + + Copyright (C) 1999-2001 Timo Sirainen + + This program 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 of the License, or + (at your option) any later version. + + This program 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 this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +*/ + +#include "module.h" +#include "textbuffer-view.h" +#include "screen.h" + +typedef struct { + char *name; + LINE_REC *line; +} BOOKMARK_REC; + +/* how often to scan line cache for lines not accessed for a while (ms) */ +#define LINE_CACHE_CHECK_TIME (5*60*1000) +/* how long to keep line cache in memory (seconds) */ +#define LINE_CACHE_KEEP_TIME (10*60) + +static int linecache_tag; +static GSList *views; + +#define view_is_bottom(view) \ + ((view)->ypos >= 0 && (view)->ypos < (view)->height) + +#define view_get_linecount(view, line) \ + textbuffer_view_get_line_cache(view, line)->count + +static GSList *textbuffer_get_views(TEXT_BUFFER_REC *buffer) +{ + GSList *tmp, *list; + + for (tmp = views; tmp != NULL; tmp = tmp->next) { + TEXT_BUFFER_VIEW_REC *view = tmp->data; + + if (view->buffer == buffer) { + list = g_slist_copy(view->siblings); + return g_slist_prepend(list, view); + } + } + + return NULL; +} + +static TEXT_BUFFER_CACHE_REC * +textbuffer_cache_get(GSList *views, int width) +{ + TEXT_BUFFER_CACHE_REC *cache; + + /* check if there's existing cache with correct width */ + while (views != NULL) { + TEXT_BUFFER_VIEW_REC *view = views->data; + + if (view->width == width) { + view->cache->refcount++; + return view->cache; + } + views = views->next; + } + + /* create new cache */ + cache = g_new0(TEXT_BUFFER_CACHE_REC, 1); + cache->refcount = 1; + cache->width = width; + cache->line_cache = g_hash_table_new((GHashFunc) g_direct_hash, + (GCompareFunc) g_direct_equal); + return cache; +} + +static int line_cache_destroy(void *key, LINE_CACHE_REC *cache) +{ + g_free(cache); + return TRUE; +} + +static void textbuffer_cache_destroy(TEXT_BUFFER_CACHE_REC *cache) +{ + g_hash_table_foreach(cache->line_cache, + (GHFunc) line_cache_destroy, NULL); + g_hash_table_destroy(cache->line_cache); + g_free(cache); +} + +static void textbuffer_cache_unref(TEXT_BUFFER_CACHE_REC *cache) +{ + if (--cache->refcount == 0) + textbuffer_cache_destroy(cache); +} + +static LINE_CACHE_REC * +view_update_line_cache(TEXT_BUFFER_VIEW_REC *view, LINE_REC *line) +{ + LINE_CACHE_REC *rec; + LINE_CACHE_SUB_REC *sub; + GSList *lines; + unsigned char cmd; + char *ptr, *last_space_ptr; + int xpos, pos, indent_pos, last_space, last_color, color, linecount; + + g_return_val_if_fail(line->text != NULL, NULL); + + xpos = 0; color = 0; indent_pos = view->default_indent; + last_space = last_color = 0; last_space_ptr = NULL; sub = NULL; + + linecount = 1; + lines = NULL; + for (ptr = line->text;;) { + if (*ptr == '\0') { + /* command */ + ptr++; + cmd = *ptr; + ptr++; + + if (cmd == LINE_CMD_EOL || cmd == LINE_CMD_FORMAT) + break; + + if (cmd == LINE_CMD_CONTINUE) { + char *tmp; + + memcpy(&tmp, ptr, sizeof(char *)); + ptr = tmp; + continue; + } + + if ((cmd & 0x80) == 0) { + /* set color */ + color = (color & ATTR_UNDERLINE) | cmd; + } else switch (cmd) { + case LINE_CMD_UNDERLINE: + color ^= ATTR_UNDERLINE; + break; + case LINE_CMD_COLOR0: + color = color & ATTR_UNDERLINE; + break; + case LINE_CMD_COLOR8: + color &= 0xfff0; + color |= 8|ATTR_COLOR8; + break; + case LINE_CMD_BLINK: + color |= 0x80; + break; + case LINE_CMD_INDENT: + /* set indentation position here - don't do + it if we're too close to right border */ + if (xpos < view->width-5) indent_pos = xpos; + break; + } + continue; + } + + if (xpos == view->width && sub != NULL && + (last_space <= indent_pos || last_space <= 10)) { + /* long word, remove the indentation from this line */ + xpos -= sub->indent; + sub->indent = 0; + } + + if (xpos == view->width) { + xpos = indent_pos; + + sub = g_new0(LINE_CACHE_SUB_REC, 1); + if (last_space > indent_pos && last_space > 10) { + /* go back to last space */ + color = last_color; + ptr = last_space_ptr; + while (*ptr == ' ') ptr++; + } else { + /* long word, no indentation in next line */ + xpos = 0; + sub->continues = TRUE; + } + + sub->start = ptr; + sub->indent = xpos; + sub->color = color; + + lines = g_slist_append(lines, sub); + linecount++; + + last_space = 0; + continue; + } + + xpos++; + if (*ptr++ == ' ') { + last_space = xpos-1; + last_space_ptr = ptr; + last_color = color; + } + } + + rec = g_malloc(sizeof(LINE_CACHE_REC)-sizeof(LINE_CACHE_SUB_REC) + + sizeof(LINE_CACHE_SUB_REC) * (linecount-1)); + rec->last_access = time(NULL); + rec->count = linecount; + + if (rec->count > 1) { + for (pos = 0; lines != NULL; pos++) { + memcpy(&rec->lines[pos], lines->data, + sizeof(LINE_CACHE_SUB_REC)); + + g_free(lines->data); + lines = g_slist_remove(lines, lines->data); + } + } + + g_hash_table_insert(view->cache->line_cache, line, rec); + return rec; +} + +static int view_line_draw(TEXT_BUFFER_VIEW_REC *view, LINE_REC *line, + int subline, int ypos, int max) +{ + LINE_CACHE_REC *cache; + const unsigned char *text, *text_newline; + char *tmp; + int xpos, color, drawcount, first; + + cache = textbuffer_view_get_line_cache(view, line); + if (subline >= cache->count) + return 0; + + xpos = color = drawcount = 0; first = TRUE; + text_newline = text = + subline == 0 ? line->text : cache->lines[subline-1].start; + for (;;) { + if (text == text_newline) { + if (first) + first = FALSE; + else { + ypos++; + if (--max == 0) + break; + } + + if (subline > 0) { + xpos = cache->lines[subline-1].indent; + color = cache->lines[subline-1].color; + } + + set_color(view->window, 0); + wmove(view->window, ypos, 0); + wclrtoeol(view->window); + + wmove(view->window, ypos, xpos); + set_color(view->window, color); + + /* get the beginning of the next subline */ + text_newline = subline == cache->count-1 ? NULL : + cache->lines[subline].start; + + drawcount++; + subline++; + } + + if (*text == '\0') { + /* command */ + text++; + if (*text == LINE_CMD_EOL || *text == LINE_CMD_FORMAT) + break; + + if ((*text & 0x80) == 0) { + /* set color */ + color = (color & ATTR_UNDERLINE) | *text; + } else if (*text == LINE_CMD_CONTINUE) { + /* jump to next block */ + memcpy(&tmp, text+1, sizeof(unsigned char *)); + text = tmp; + continue; + } else switch (*text) { + case LINE_CMD_UNDERLINE: + color ^= ATTR_UNDERLINE; + break; + case LINE_CMD_COLOR0: + color = color & ATTR_UNDERLINE; + break; + case LINE_CMD_COLOR8: + color &= 0xfff0; + color |= 8|ATTR_COLOR8; + break; + case LINE_CMD_BLINK: + color |= 0x80; + break; + } + set_color(view->window, color); + text++; + continue; + } + + if ((*text & 127) >= 32) + waddch(view->window, *text); + else { + /* low-ascii */ + set_color(view->window, ATTR_REVERSE); + waddch(view->window, (*text & 127)+'A'-1); + set_color(view->window, color); + } + text++; + } + + return drawcount; +} + +/* Recalculate view's bottom line information - try to keep the + original if possible */ +static void textbuffer_view_init_bottom(TEXT_BUFFER_VIEW_REC *view) +{ + GList *tmp; + int linecount, total; + + if (view->empty_linecount == 0) { + /* no empty lines in screen, no need to try to keep + the old bottom startline */ + view->bottom_startline = NULL; + } + + total = 0; + tmp = g_list_last(view->buffer->lines); + for (; tmp != NULL; tmp = tmp->prev) { + LINE_REC *line = tmp->data; + + linecount = view_get_linecount(view, line); + if (tmp == view->bottom_startline) { + /* keep the old one, make sure that subline is ok */ + if (view->bottom_subline > linecount) + view->bottom_subline = linecount; + view->empty_linecount = view->height - total - + (linecount-view->bottom_subline); + return; + } + + total += linecount; + if (total >= view->height) { + view->bottom_startline = tmp; + view->bottom_subline = total - view->height; + view->empty_linecount = 0; + return; + } + } + + /* not enough lines so we must be at the beginning of the buffer */ + view->bottom_startline = view->buffer->lines; + view->bottom_subline = 0; + view->empty_linecount = view->height - total; +} + +static void textbuffer_view_init_ypos(TEXT_BUFFER_VIEW_REC *view) +{ + GList *tmp; + + g_return_if_fail(view != NULL); + + view->ypos = -view->subline-1; + for (tmp = view->startline; tmp != NULL; tmp = tmp->next) + view->ypos += view_get_linecount(view, tmp->data); +} + +/* Create new view. */ +TEXT_BUFFER_VIEW_REC *textbuffer_view_create(TEXT_BUFFER_REC *buffer, + int width, int height, + int default_indent) +{ + TEXT_BUFFER_VIEW_REC *view; + + view = g_new0(TEXT_BUFFER_VIEW_REC, 1); + view->buffer = buffer; + view->siblings = textbuffer_get_views(buffer); + + view->width = width; + view->height = height; + view->default_indent = default_indent; + + view->cache = textbuffer_cache_get(view->siblings, width); + textbuffer_view_init_bottom(view); + + view->startline = view->bottom_startline; + view->subline = view->bottom_subline; + view->bottom = TRUE; + + textbuffer_view_init_ypos(view); + + view->bookmarks = g_hash_table_new((GHashFunc) g_str_hash, + (GCompareFunc) g_str_equal); + + views = g_slist_append(views, view); + return view; +} + +/* Destroy the view. */ +void textbuffer_view_destroy(TEXT_BUFFER_VIEW_REC *view) +{ + GSList *tmp; + + views = g_slist_remove(views, view); + + if (view->siblings == NULL) { + /* last view for textbuffer, destroy */ + textbuffer_destroy(view->buffer); + } else { + /* remove ourself from siblings lists */ + for (tmp = view->siblings; tmp != NULL; tmp = tmp->next) { + TEXT_BUFFER_VIEW_REC *rec = tmp->data; + + rec->siblings = g_slist_remove(rec->siblings, view); + } + g_slist_free(view->siblings); + } + + g_hash_table_foreach(view->bookmarks, (GHFunc) g_free, NULL); + g_hash_table_destroy(view->bookmarks); + + textbuffer_cache_unref(view->cache); + g_free(view); +} + +/* Change the default indent position */ +void textbuffer_view_set_default_indent(TEXT_BUFFER_VIEW_REC *view, + int default_indent) +{ + view->default_indent = default_indent; +} + +static int view_get_linecount_all(TEXT_BUFFER_VIEW_REC *view, GList *lines) +{ + int linecount; + + linecount = 0; + while (lines != NULL) { + linecount += view_get_linecount(view, lines->data); + lines = lines->next; + } + + return linecount; +} + +static void view_draw(TEXT_BUFFER_VIEW_REC *view, GList *line, + int subline, int ypos, int lines) +{ + int linecount; + + while (line != NULL && lines > 0) { + LINE_REC *rec = line->data; + + linecount = view_line_draw(view, rec, subline, ypos, lines); + ypos += linecount; lines -= linecount; + + subline = 0; + line = line->next; + } + + /* clear the rest of the view */ + while (ypos < lines) { + wmove(view->window, ypos, 0); + wclrtoeol(view->window); + ypos++; + } +} + +#define view_draw_top(view, lines) \ + view_draw(view, (view)->startline, (view)->subline, 0, lines) + +static void view_draw_bottom(TEXT_BUFFER_VIEW_REC *view, int lines) +{ + GList *line; + int ypos, maxline, subline, linecount; + + maxline = view->height-lines; + line = view->startline; ypos = -view->subline; subline = 0; + while (line != NULL && ypos < maxline) { + linecount = view_get_linecount(view, line->data); + ypos += linecount; + if (ypos > maxline) { + subline = maxline-(ypos-linecount); + break; + } + line = line->next; + } + + view_draw(view, line, subline, maxline, lines); +} + +/* Returns number of lines actually scrolled */ +static int view_scroll(TEXT_BUFFER_VIEW_REC *view, GList **lines, int *subline, + int scrollcount, int draw_nonclean) +{ + int linecount, realcount, scroll_visible; + + /* scroll down */ + scroll_visible = lines == &view->startline; + + realcount = -*subline; + scrollcount += *subline; + *subline = 0; + while (scrollcount > 0) { + linecount = view_get_linecount(view, (*lines)->data); + + if ((scroll_visible && *lines == view->bottom_startline) && + (scrollcount >= view->bottom_subline)) { + *subline = view->bottom_subline; + realcount += view->bottom_subline; + scrollcount = 0; + break; + } + + realcount += linecount; + scrollcount -= linecount; + if (scrollcount < 0) { + realcount += scrollcount; + *subline = linecount+scrollcount; + scrollcount = 0; + break; + } + + *lines = (*lines)->next; + } + + /* scroll up */ + while (scrollcount < 0 && (*lines)->prev != NULL) { + *lines = (*lines)->prev; + linecount = view_get_linecount(view, (*lines)->data); + + realcount -= linecount; + scrollcount += linecount; + if (scrollcount > 0) { + realcount += scrollcount; + *subline = scrollcount; + break; + } + } + + if (scroll_visible && realcount != 0) { + if (realcount <= -view->height || realcount >= view->height) { + /* scrolled more than screenful, redraw the + whole view */ + textbuffer_view_redraw(view); + } else { + scrollok(view->window, TRUE); + wscrl(view->window, realcount); + scrollok(view->window, FALSE); + + if (draw_nonclean) { + if (realcount < 0) + view_draw_top(view, -realcount); + else + view_draw_bottom(view, realcount); + } + + screen_refresh(view->window); + } + } + + return realcount >= 0 ? realcount : -realcount; +} + +/* Resize the view. */ +void textbuffer_view_resize(TEXT_BUFFER_VIEW_REC *view, int width, int height) +{ + int linecount; + + if (view->buffer->lines == NULL) + return; + + if (view->width != width) { + /* line cache needs to be recreated */ + textbuffer_cache_unref(view->cache); + view->cache = textbuffer_cache_get(view->siblings, width); + } + + view->width = width; + view->height = height; + + textbuffer_view_init_bottom(view); + + /* check that we didn't scroll lower than bottom startline.. */ + if (g_list_find(view->bottom_startline->next, + view->startline->data) != NULL) { + view->startline = view->bottom_startline; + view->subline = view->bottom_subline; + } else if (view->startline == view->bottom_startline && + view->subline > view->bottom_subline) { + view->subline = view->bottom_subline; + } else { + /* make sure the subline is still in allowed range */ + linecount = view_get_linecount(view, view->startline->data); + if (view->subline > linecount) + view->subline = linecount; + } + + textbuffer_view_init_ypos(view); + if (view->bottom && !view_is_bottom(view)) { + /* we scrolled to far up, need to get down. go right over + the empty lines if there's any */ + view->startline = view->bottom_startline; + view->subline = view->bottom_subline; + if (view->empty_linecount > 0) { + view_scroll(view, &view->startline, &view->subline, + -view->empty_linecount, FALSE); + } + } + + view->bottom = view_is_bottom(view); + if (view->bottom) { + /* check if we left empty space at the bottom.. */ + linecount = view_get_linecount_all(view, view->startline) - + view->subline; + if (view->empty_linecount < view->height-linecount) + view->empty_linecount = view->height-linecount; + } + + textbuffer_view_redraw(view); +} + +/* Clear the view, don't actually remove any lines from buffer. */ +void textbuffer_view_clear(TEXT_BUFFER_VIEW_REC *view) +{ + view->ypos = -1; + view->bottom_startline = view->startline = + g_list_last(view->buffer->lines); + view->bottom_subline = view->subline = + view->buffer->cur_line == NULL ? 0 : + view_get_linecount(view, view->buffer->cur_line); + view->empty_linecount = view->height; + view->bottom = TRUE; + + textbuffer_view_redraw(view); +} + +/* Scroll the view up/down */ +void textbuffer_view_scroll(TEXT_BUFFER_VIEW_REC *view, int lines) +{ + int count; + + count = view_scroll(view, &view->startline, &view->subline, + lines, TRUE); + view->ypos += lines < 0 ? count : -count; + view->bottom = view_is_bottom(view); + + screen_refresh(view->window); +} + +/* Scroll to specified line */ +void textbuffer_view_scroll_line(TEXT_BUFFER_VIEW_REC *view, LINE_REC *line) +{ + GList *tmp; + + if (g_list_find(view->bottom_startline->next, line) != NULL) { + view->startline = view->bottom_startline; + view->subline = view->bottom_subline; + } else { + for (tmp = view->buffer->lines; tmp != NULL; tmp = tmp->next) { + LINE_REC *rec = tmp->data; + + if (rec == line) { + view->startline = tmp; + view->subline = 0; + break; + } + } + } + + textbuffer_view_init_ypos(view); + view->bottom = view_is_bottom(view); + + textbuffer_view_redraw(view); +} + +/* Return line cache */ +LINE_CACHE_REC *textbuffer_view_get_line_cache(TEXT_BUFFER_VIEW_REC *view, + LINE_REC *line) +{ + LINE_CACHE_REC *cache; + + cache = g_hash_table_lookup(view->cache->line_cache, line); + if (cache == NULL) + cache = view_update_line_cache(view, line); + else + cache->last_access = time(NULL); + + return cache; +} + +static void view_remove_cache(TEXT_BUFFER_VIEW_REC *view, LINE_REC *line, + unsigned char update_counter) +{ + LINE_CACHE_REC *cache; + + if (view->cache->update_counter == update_counter) + return; + view->cache->update_counter = update_counter; + + cache = g_hash_table_lookup(view->cache->line_cache, line); + if (cache != NULL) { + g_free(cache); + g_hash_table_remove(view->cache->line_cache, line); + } +} + +static void view_update_cache(TEXT_BUFFER_VIEW_REC *view, LINE_REC *line, + unsigned char update_counter) +{ + view_remove_cache(view, line, update_counter); + + if (view->buffer->cur_line == line) + view->cache->last_linecount = view_get_linecount(view, line); +} + +static void view_insert_line(TEXT_BUFFER_VIEW_REC *view, LINE_REC *line) +{ + int linecount, ypos, subline; + + if (view->bottom_startline == NULL) { + view->startline = view->bottom_startline = + view->buffer->lines; + } + + if (view->buffer->cur_line != line && + g_list_find(view->bottom_startline, line) == NULL) + return; + + linecount = view->cache->last_linecount; + view->ypos += linecount; + if (view->empty_linecount > 0) { + view->empty_linecount -= linecount; + if (view->empty_linecount >= 0) + linecount = 0; + else { + linecount = -view->empty_linecount; + view->empty_linecount = 0; + } + } + + if (linecount > 0) { + view_scroll(view, &view->bottom_startline, + &view->bottom_subline, linecount, FALSE); + } + + if (view->bottom) { + if (view->ypos >= view->height) { + linecount = view->ypos-view->height+1; + view_scroll(view, &view->startline, + &view->subline, linecount, FALSE); + view->ypos -= linecount; + } + + ypos = view->ypos+1 - view->cache->last_linecount; + if (ypos >= 0) + subline = 0; + else { + subline = -ypos; + ypos = 0; + } + view_line_draw(view, line, subline, ypos, view->height-ypos); + } + screen_refresh(view->window); +} + +/* Update some line in the buffer which has been modified using + textbuffer_append() or textbuffer_insert(). */ +void textbuffer_view_insert_line(TEXT_BUFFER_VIEW_REC *view, LINE_REC *line) +{ + GSList *tmp; + unsigned char update_counter; + + if (!view->buffer->last_eol) + return; + + update_counter = view->cache->update_counter+1; + view_update_cache(view, line, update_counter); + view_insert_line(view, line); + + for (tmp = view->siblings; tmp != NULL; tmp = tmp->next) { + TEXT_BUFFER_VIEW_REC *rec = tmp->data; + + view_update_cache(rec, line, update_counter); + view_insert_line(rec, line); + } +} + +typedef struct { + LINE_REC *remove_line; + GSList *remove_list; +} BOOKMARK_FIND_REC; + +static void bookmark_check_remove(char *key, LINE_REC *line, + BOOKMARK_FIND_REC *rec) +{ + if (line == rec->remove_line) + rec->remove_list = g_slist_append(rec->remove_list, key); +} + +static void view_bookmarks_check(TEXT_BUFFER_VIEW_REC *view, LINE_REC *line) +{ + BOOKMARK_FIND_REC rec; + LINE_REC *newline; + GSList *tmp; + + rec.remove_line = line; + rec.remove_list = NULL; + g_hash_table_foreach(view->bookmarks, + (GHFunc) bookmark_check_remove, &rec); + + if (rec.remove_list != NULL) { + GList *pos = g_list_find(view->buffer->lines, line); + newline = pos->prev == NULL ? NULL : pos->next->data; + for (tmp = rec.remove_list; tmp != NULL; tmp = tmp->next) { + g_hash_table_remove(view->bookmarks, tmp->data); + if (newline != NULL) { + g_hash_table_insert(view->bookmarks, + tmp->data, newline); + } + } + g_slist_free(rec.remove_list); + } +} + +/* Return number of real lines `lines' list takes - + stops counting when the height reaches the view height */ +static int view_get_lines_height(TEXT_BUFFER_VIEW_REC *view, + GList *lines, int subline, + LINE_REC *skip_line) +{ + int height, linecount; + + height = -subline; + while (lines != NULL && height < view->height) { + LINE_REC *line = lines->data; + + if (line != skip_line) { + linecount = view_get_linecount(view, line); + height += linecount; + } + lines = lines->next; + } + + return height < view->height ? height : view->height; +} + +static void view_remove_line(TEXT_BUFFER_VIEW_REC *view, LINE_REC *line, + int linecount) +{ + int realcount, scroll; + + view_bookmarks_check(view, line); + + if (view->buffer->cur_line == line) { + /* the last line is being removed */ + LINE_REC *prevline; + + prevline = view->buffer->lines->data == line ? NULL : + g_list_last(view->bottom_startline)->data; + view->cache->last_linecount = prevline == NULL ? 0 : + view_get_linecount(view, prevline); + } + + if (line == view->buffer->lines->data) { + /* first line in the buffer - this is the most commonly + removed line.. */ + if (line == view->bottom_startline->data) { + /* very small scrollback.. */ + view->bottom_startline = view->bottom_startline->next; + view->bottom_subline = 0; + + if (view->startline->data == line) { + view->startline = view->startline->next; + view->subline = 0; + view->empty_linecount += linecount; + view->ypos -= linecount; + } + } + } else if (g_list_find(view->bottom_startline, line) != NULL) { + realcount = view_scroll(view, &view->bottom_startline, + &view->bottom_subline, + -linecount, FALSE); + if (view->bottom) { + /* we're at the bottom, remove the same amount as + from bottom_startline */ + view_scroll(view, &view->startline, + &view->subline, -linecount, TRUE); + view->ypos -= realcount; + } else { + if (view->startline->data == line) { + view->startline = + view->startline->next != NULL ? + view->startline->next : + view->startline->prev; + view->subline = 0; + } + scroll = view->height - + view_get_lines_height(view, view->startline, + view->subline, line); + if (scroll > 0) { + view_scroll(view, &view->startline, + &view->subline, -scroll, TRUE); + view->ypos -= scroll; + } + } + view->empty_linecount += linecount-realcount; + } + + view->bottom = view_is_bottom(view); + screen_refresh(view->window); +} + +/* Remove one line from buffer. */ +void textbuffer_view_remove_line(TEXT_BUFFER_VIEW_REC *view, LINE_REC *line) +{ + GSList *tmp; + unsigned char update_counter; + int linecount; + + linecount = view_get_linecount(view, line); + update_counter = view->cache->update_counter+1; + + view_remove_line(view, line, linecount); + view_remove_cache(view, line, update_counter); + + for (tmp = view->siblings; tmp != NULL; tmp = tmp->next) { + TEXT_BUFFER_VIEW_REC *rec = tmp->data; + + view_remove_line(rec, line, linecount); + view_remove_cache(rec, line, update_counter); + } + + textbuffer_remove(view->buffer, line); +} + +/* Remove all lines from buffer. */ +void textbuffer_view_remove_all_lines(TEXT_BUFFER_VIEW_REC *view) +{ + GSList *tmp; + + textbuffer_remove_all_lines(view->buffer); + + /* destroy line caches - note that you can't do simultaneously + unrefs + cache_get()s or it will keep using the old caches */ + textbuffer_cache_unref(view->cache); + g_slist_foreach(view->siblings, (GFunc) textbuffer_cache_unref, NULL); + + /* recreate caches, clear screens */ + view->cache = textbuffer_cache_get(view->siblings, view->width); + textbuffer_view_clear(view); + + for (tmp = view->siblings; tmp != NULL; tmp = tmp->next) { + TEXT_BUFFER_VIEW_REC *rec = tmp->data; + + rec->cache = textbuffer_cache_get(rec->siblings, rec->width); + textbuffer_view_clear(rec); + } +} + +/* Set a bookmark in view */ +void textbuffer_view_set_bookmark(TEXT_BUFFER_VIEW_REC *view, + const char *name, LINE_REC *line) +{ + gpointer key, value; + + if (g_hash_table_lookup_extended(view->bookmarks, name, + &key, &value)) { + g_hash_table_remove(view->bookmarks, key); + g_free(key); + } + + g_hash_table_insert(view->bookmarks, g_strdup(name), line); +} + +/* Set a bookmark in view to the bottom line */ +void textbuffer_view_set_bookmark_bottom(TEXT_BUFFER_VIEW_REC *view, + const char *name) +{ + LINE_REC *line; + + if (view->bottom_startline != NULL) { + line = g_list_last(view->bottom_startline)->data; + textbuffer_view_set_bookmark(view, name, line); + } +} + +/* Return the line for bookmark */ +LINE_REC *textbuffer_view_get_bookmark(TEXT_BUFFER_VIEW_REC *view, + const char *name) +{ + return g_hash_table_lookup(view->bookmarks, name); +} + +/* Specify window where the changes in view should be drawn, + NULL disables it. */ +void textbuffer_view_set_window(TEXT_BUFFER_VIEW_REC *view, WINDOW *window) +{ + if (view->window != window) { + view->window = window; + if (window != NULL) + textbuffer_view_redraw(view); + } +} + +/* Redraw a view to window */ +void textbuffer_view_redraw(TEXT_BUFFER_VIEW_REC *view) +{ + if (view->window == NULL) + return; + + view_draw_top(view, view->height); + screen_refresh(view->window); +} + +static int line_cache_check_remove(void *key, LINE_CACHE_REC *cache, + time_t *now) +{ + if (cache->last_access+LINE_CACHE_KEEP_TIME > *now) + return FALSE; + + line_cache_destroy(NULL, cache); + return TRUE; +} + +static int sig_check_linecache(void) +{ + GSList *tmp, *caches; + time_t now; + + now = time(NULL); caches = NULL; + for (tmp = views; tmp != NULL; tmp = tmp->next) { + TEXT_BUFFER_VIEW_REC *rec = tmp->data; + + if (g_slist_find(caches, rec->cache) != NULL) + continue; + + caches = g_slist_append(caches, rec->cache); + g_hash_table_foreach_remove(rec->cache->line_cache, + (GHRFunc) line_cache_check_remove, + &now); + } + return 1; +} + +void textbuffer_view_init(void) +{ + linecache_tag = g_timeout_add(LINE_CACHE_CHECK_TIME, (GSourceFunc) sig_check_linecache, NULL); +} + +void textbuffer_view_deinit(void) +{ + g_source_remove(linecache_tag); +} |